"Fossies" - the Fresh Open Source Software Archive

Member "openssl-1.0.2q/CHANGES" (20 Nov 2018, 506570 Bytes) of package /linux/misc/openssl-1.0.2q.tar.gz:


As a special service "Fossies" has tried to format the requested text file into HTML format (style: standard) with prefixed line numbers. Alternatively you can here view or download the uninterpreted source code file. See also the last Fossies "Diffs" side-by-side code changes report for "CHANGES": 1.1.1-pre8_vs_1.1.1-pre9.

    1 
    2  OpenSSL CHANGES
    3  _______________
    4 
    5  This is a high-level summary of the most important changes.
    6  For a full list of changes, see the git commit log; for example,
    7  https://github.com/openssl/openssl/commits/ and pick the appropriate
    8  release branch.
    9 
   10  Changes between 1.0.2p and 1.0.2q [20 Nov 2018]
   11 
   12   *) Microarchitecture timing vulnerability in ECC scalar multiplication
   13 
   14      OpenSSL ECC scalar multiplication, used in e.g. ECDSA and ECDH, has been
   15      shown to be vulnerable to a microarchitecture timing side channel attack.
   16      An attacker with sufficient access to mount local timing attacks during
   17      ECDSA signature generation could recover the private key.
   18 
   19      This issue was reported to OpenSSL on 26th October 2018 by Alejandro
   20      Cabrera Aldaya, Billy Brumley, Sohaib ul Hassan, Cesar Pereida Garcia and
   21      Nicola Tuveri.
   22      (CVE-2018-5407)
   23      [Billy Brumley]
   24 
   25   *) Timing vulnerability in DSA signature generation
   26 
   27      The OpenSSL DSA signature algorithm has been shown to be vulnerable to a
   28      timing side channel attack. An attacker could use variations in the signing
   29      algorithm to recover the private key.
   30 
   31      This issue was reported to OpenSSL on 16th October 2018 by Samuel Weiser.
   32      (CVE-2018-0734)
   33      [Paul Dale]
   34 
   35   *) Resolve a compatibility issue in EC_GROUP handling with the FIPS Object
   36      Module, accidentally introduced while backporting security fixes from the
   37      development branch and hindering the use of ECC in FIPS mode.
   38      [Nicola Tuveri]
   39 
   40  Changes between 1.0.2o and 1.0.2p [14 Aug 2018]
   41 
   42   *) Client DoS due to large DH parameter
   43 
   44      During key agreement in a TLS handshake using a DH(E) based ciphersuite a
   45      malicious server can send a very large prime value to the client. This will
   46      cause the client to spend an unreasonably long period of time generating a
   47      key for this prime resulting in a hang until the client has finished. This
   48      could be exploited in a Denial Of Service attack.
   49 
   50      This issue was reported to OpenSSL on 5th June 2018 by Guido Vranken
   51      (CVE-2018-0732)
   52      [Guido Vranken]
   53 
   54   *) Cache timing vulnerability in RSA Key Generation
   55 
   56      The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to
   57      a cache timing side channel attack. An attacker with sufficient access to
   58      mount cache timing attacks during the RSA key generation process could
   59      recover the private key.
   60 
   61      This issue was reported to OpenSSL on 4th April 2018 by Alejandro Cabrera
   62      Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis Manuel Alvarez Tapia.
   63      (CVE-2018-0737)
   64      [Billy Brumley]
   65 
   66   *) Make EVP_PKEY_asn1_new() a bit stricter about its input.  A NULL pem_str
   67      parameter is no longer accepted, as it leads to a corrupt table.  NULL
   68      pem_str is reserved for alias entries only.
   69      [Richard Levitte]
   70 
   71   *) Revert blinding in ECDSA sign and instead make problematic addition
   72      length-invariant. Switch even to fixed-length Montgomery multiplication.
   73      [Andy Polyakov]
   74 
   75   *) Change generating and checking of primes so that the error rate of not
   76      being prime depends on the intended use based on the size of the input.
   77      For larger primes this will result in more rounds of Miller-Rabin.
   78      The maximal error rate for primes with more than 1080 bits is lowered
   79      to 2^-128.
   80      [Kurt Roeckx, Annie Yousar]
   81 
   82   *) Increase the number of Miller-Rabin rounds for DSA key generating to 64.
   83      [Kurt Roeckx]
   84 
   85   *) Add blinding to ECDSA and DSA signatures to protect against side channel
   86      attacks discovered by Keegan Ryan (NCC Group).
   87      [Matt Caswell]
   88 
   89   *) When unlocking a pass phrase protected PEM file or PKCS#8 container, we
   90      now allow empty (zero character) pass phrases.
   91      [Richard Levitte]
   92 
   93   *) Certificate time validation (X509_cmp_time) enforces stricter
   94      compliance with RFC 5280. Fractional seconds and timezone offsets
   95      are no longer allowed.
   96      [Emilia Käsper]
   97 
   98  Changes between 1.0.2n and 1.0.2o [27 Mar 2018]
   99 
  100   *) Constructed ASN.1 types with a recursive definition could exceed the stack
  101 
  102      Constructed ASN.1 types with a recursive definition (such as can be found
  103      in PKCS7) could eventually exceed the stack given malicious input with
  104      excessive recursion. This could result in a Denial Of Service attack. There
  105      are no such structures used within SSL/TLS that come from untrusted sources
  106      so this is considered safe.
  107 
  108      This issue was reported to OpenSSL on 4th January 2018 by the OSS-fuzz
  109      project.
  110      (CVE-2018-0739)
  111      [Matt Caswell]
  112 
  113  Changes between 1.0.2m and 1.0.2n [7 Dec 2017]
  114 
  115   *) Read/write after SSL object in error state
  116 
  117      OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state"
  118      mechanism. The intent was that if a fatal error occurred during a handshake
  119      then OpenSSL would move into the error state and would immediately fail if
  120      you attempted to continue the handshake. This works as designed for the
  121      explicit handshake functions (SSL_do_handshake(), SSL_accept() and
  122      SSL_connect()), however due to a bug it does not work correctly if
  123      SSL_read() or SSL_write() is called directly. In that scenario, if the
  124      handshake fails then a fatal error will be returned in the initial function
  125      call. If SSL_read()/SSL_write() is subsequently called by the application
  126      for the same SSL object then it will succeed and the data is passed without
  127      being decrypted/encrypted directly from the SSL/TLS record layer.
  128 
  129      In order to exploit this issue an application bug would have to be present
  130      that resulted in a call to SSL_read()/SSL_write() being issued after having
  131      already received a fatal error.
  132 
  133      This issue was reported to OpenSSL by David Benjamin (Google).
  134      (CVE-2017-3737)
  135      [Matt Caswell]
  136 
  137   *) rsaz_1024_mul_avx2 overflow bug on x86_64
  138 
  139      There is an overflow bug in the AVX2 Montgomery multiplication procedure
  140      used in exponentiation with 1024-bit moduli. No EC algorithms are affected.
  141      Analysis suggests that attacks against RSA and DSA as a result of this
  142      defect would be very difficult to perform and are not believed likely.
  143      Attacks against DH1024 are considered just feasible, because most of the
  144      work necessary to deduce information about a private key may be performed
  145      offline. The amount of resources required for such an attack would be
  146      significant. However, for an attack on TLS to be meaningful, the server
  147      would have to share the DH1024 private key among multiple clients, which is
  148      no longer an option since CVE-2016-0701.
  149 
  150      This only affects processors that support the AVX2 but not ADX extensions
  151      like Intel Haswell (4th generation).
  152 
  153      This issue was reported to OpenSSL by David Benjamin (Google). The issue
  154      was originally found via the OSS-Fuzz project.
  155      (CVE-2017-3738)
  156      [Andy Polyakov]
  157 
  158  Changes between 1.0.2l and 1.0.2m [2 Nov 2017]
  159 
  160   *) bn_sqrx8x_internal carry bug on x86_64
  161 
  162      There is a carry propagating bug in the x86_64 Montgomery squaring
  163      procedure. No EC algorithms are affected. Analysis suggests that attacks
  164      against RSA and DSA as a result of this defect would be very difficult to
  165      perform and are not believed likely. Attacks against DH are considered just
  166      feasible (although very difficult) because most of the work necessary to
  167      deduce information about a private key may be performed offline. The amount
  168      of resources required for such an attack would be very significant and
  169      likely only accessible to a limited number of attackers. An attacker would
  170      additionally need online access to an unpatched system using the target
  171      private key in a scenario with persistent DH parameters and a private
  172      key that is shared between multiple clients.
  173 
  174      This only affects processors that support the BMI1, BMI2 and ADX extensions
  175      like Intel Broadwell (5th generation) and later or AMD Ryzen.
  176 
  177      This issue was reported to OpenSSL by the OSS-Fuzz project.
  178      (CVE-2017-3736)
  179      [Andy Polyakov]
  180 
  181   *) Malformed X.509 IPAddressFamily could cause OOB read
  182 
  183      If an X.509 certificate has a malformed IPAddressFamily extension,
  184      OpenSSL could do a one-byte buffer overread. The most likely result
  185      would be an erroneous display of the certificate in text format.
  186 
  187      This issue was reported to OpenSSL by the OSS-Fuzz project.
  188      (CVE-2017-3735)
  189      [Rich Salz]
  190 
  191  Changes between 1.0.2k and 1.0.2l [25 May 2017]
  192 
  193   *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target
  194      platform rather than 'mingw'.
  195      [Richard Levitte]
  196 
  197  Changes between 1.0.2j and 1.0.2k [26 Jan 2017]
  198 
  199   *) Truncated packet could crash via OOB read
  200 
  201      If one side of an SSL/TLS path is running on a 32-bit host and a specific
  202      cipher is being used, then a truncated packet can cause that host to
  203      perform an out-of-bounds read, usually resulting in a crash.
  204 
  205      This issue was reported to OpenSSL by Robert Święcki of Google.
  206      (CVE-2017-3731)
  207      [Andy Polyakov]
  208 
  209   *) BN_mod_exp may produce incorrect results on x86_64
  210 
  211      There is a carry propagating bug in the x86_64 Montgomery squaring
  212      procedure. No EC algorithms are affected. Analysis suggests that attacks
  213      against RSA and DSA as a result of this defect would be very difficult to
  214      perform and are not believed likely. Attacks against DH are considered just
  215      feasible (although very difficult) because most of the work necessary to
  216      deduce information about a private key may be performed offline. The amount
  217      of resources required for such an attack would be very significant and
  218      likely only accessible to a limited number of attackers. An attacker would
  219      additionally need online access to an unpatched system using the target
  220      private key in a scenario with persistent DH parameters and a private
  221      key that is shared between multiple clients. For example this can occur by
  222      default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very
  223      similar to CVE-2015-3193 but must be treated as a separate problem.
  224 
  225      This issue was reported to OpenSSL by the OSS-Fuzz project.
  226      (CVE-2017-3732)
  227      [Andy Polyakov]
  228 
  229   *) Montgomery multiplication may produce incorrect results
  230 
  231      There is a carry propagating bug in the Broadwell-specific Montgomery
  232      multiplication procedure that handles input lengths divisible by, but
  233      longer than 256 bits. Analysis suggests that attacks against RSA, DSA
  234      and DH private keys are impossible. This is because the subroutine in
  235      question is not used in operations with the private key itself and an input
  236      of the attacker's direct choice. Otherwise the bug can manifest itself as
  237      transient authentication and key negotiation failures or reproducible
  238      erroneous outcome of public-key operations with specially crafted input.
  239      Among EC algorithms only Brainpool P-512 curves are affected and one
  240      presumably can attack ECDH key negotiation. Impact was not analyzed in
  241      detail, because pre-requisites for attack are considered unlikely. Namely
  242      multiple clients have to choose the curve in question and the server has to
  243      share the private key among them, neither of which is default behaviour.
  244      Even then only clients that chose the curve will be affected.
  245 
  246      This issue was publicly reported as transient failures and was not
  247      initially recognized as a security issue. Thanks to Richard Morgan for
  248      providing reproducible case.
  249      (CVE-2016-7055)
  250      [Andy Polyakov]
  251 
  252   *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0
  253      or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to
  254      prevent issues where no progress is being made and the peer continually
  255      sends unrecognised record types, using up resources processing them.
  256      [Matt Caswell]
  257 
  258  Changes between 1.0.2i and 1.0.2j [26 Sep 2016]
  259 
  260   *) Missing CRL sanity check
  261 
  262      A bug fix which included a CRL sanity check was added to OpenSSL 1.1.0
  263      but was omitted from OpenSSL 1.0.2i. As a result any attempt to use
  264      CRLs in OpenSSL 1.0.2i will crash with a null pointer exception.
  265 
  266      This issue only affects the OpenSSL 1.0.2i
  267      (CVE-2016-7052)
  268      [Matt Caswell]
  269 
  270  Changes between 1.0.2h and 1.0.2i [22 Sep 2016]
  271 
  272   *) OCSP Status Request extension unbounded memory growth
  273 
  274      A malicious client can send an excessively large OCSP Status Request
  275      extension. If that client continually requests renegotiation, sending a
  276      large OCSP Status Request extension each time, then there will be unbounded
  277      memory growth on the server. This will eventually lead to a Denial Of
  278      Service attack through memory exhaustion. Servers with a default
  279      configuration are vulnerable even if they do not support OCSP. Builds using
  280      the "no-ocsp" build time option are not affected.
  281 
  282      This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
  283      (CVE-2016-6304)
  284      [Matt Caswell]
  285 
  286   *) In order to mitigate the SWEET32 attack, the DES ciphers were moved from
  287      HIGH to MEDIUM.
  288 
  289      This issue was reported to OpenSSL Karthikeyan Bhargavan and Gaetan
  290      Leurent (INRIA)
  291      (CVE-2016-2183)
  292      [Rich Salz]
  293 
  294   *) OOB write in MDC2_Update()
  295 
  296      An overflow can occur in MDC2_Update() either if called directly or
  297      through the EVP_DigestUpdate() function using MDC2. If an attacker
  298      is able to supply very large amounts of input data after a previous
  299      call to EVP_EncryptUpdate() with a partial block then a length check
  300      can overflow resulting in a heap corruption.
  301 
  302      The amount of data needed is comparable to SIZE_MAX which is impractical
  303      on most platforms.
  304 
  305      This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
  306      (CVE-2016-6303)
  307      [Stephen Henson]
  308 
  309   *) Malformed SHA512 ticket DoS
  310 
  311      If a server uses SHA512 for TLS session ticket HMAC it is vulnerable to a
  312      DoS attack where a malformed ticket will result in an OOB read which will
  313      ultimately crash.
  314 
  315      The use of SHA512 in TLS session tickets is comparatively rare as it requires
  316      a custom server callback and ticket lookup mechanism.
  317 
  318      This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
  319      (CVE-2016-6302)
  320      [Stephen Henson]
  321 
  322   *) OOB write in BN_bn2dec()
  323 
  324      The function BN_bn2dec() does not check the return value of BN_div_word().
  325      This can cause an OOB write if an application uses this function with an
  326      overly large BIGNUM. This could be a problem if an overly large certificate
  327      or CRL is printed out from an untrusted source. TLS is not affected because
  328      record limits will reject an oversized certificate before it is parsed.
  329 
  330      This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
  331      (CVE-2016-2182)
  332      [Stephen Henson]
  333 
  334   *) OOB read in TS_OBJ_print_bio()
  335 
  336      The function TS_OBJ_print_bio() misuses OBJ_obj2txt(): the return value is
  337      the total length the OID text representation would use and not the amount
  338      of data written. This will result in OOB reads when large OIDs are
  339      presented.
  340 
  341      This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
  342      (CVE-2016-2180)
  343      [Stephen Henson]
  344 
  345   *) Pointer arithmetic undefined behaviour
  346 
  347      Avoid some undefined pointer arithmetic
  348 
  349      A common idiom in the codebase is to check limits in the following manner:
  350      "p + len > limit"
  351 
  352      Where "p" points to some malloc'd data of SIZE bytes and
  353      limit == p + SIZE
  354 
  355      "len" here could be from some externally supplied data (e.g. from a TLS
  356      message).
  357 
  358      The rules of C pointer arithmetic are such that "p + len" is only well
  359      defined where len <= SIZE. Therefore the above idiom is actually
  360      undefined behaviour.
  361 
  362      For example this could cause problems if some malloc implementation
  363      provides an address for "p" such that "p + len" actually overflows for
  364      values of len that are too big and therefore p + len < limit.
  365 
  366      This issue was reported to OpenSSL by Guido Vranken
  367      (CVE-2016-2177)
  368      [Matt Caswell]
  369 
  370   *) Constant time flag not preserved in DSA signing
  371 
  372      Operations in the DSA signing algorithm should run in constant time in
  373      order to avoid side channel attacks. A flaw in the OpenSSL DSA
  374      implementation means that a non-constant time codepath is followed for
  375      certain operations. This has been demonstrated through a cache-timing
  376      attack to be sufficient for an attacker to recover the private DSA key.
  377 
  378      This issue was reported by César Pereida (Aalto University), Billy Brumley
  379      (Tampere University of Technology), and Yuval Yarom (The University of
  380      Adelaide and NICTA).
  381      (CVE-2016-2178)
  382      [César Pereida]
  383 
  384   *) DTLS buffered message DoS
  385 
  386      In a DTLS connection where handshake messages are delivered out-of-order
  387      those messages that OpenSSL is not yet ready to process will be buffered
  388      for later use. Under certain circumstances, a flaw in the logic means that
  389      those messages do not get removed from the buffer even though the handshake
  390      has been completed. An attacker could force up to approx. 15 messages to
  391      remain in the buffer when they are no longer required. These messages will
  392      be cleared when the DTLS connection is closed. The default maximum size for
  393      a message is 100k. Therefore the attacker could force an additional 1500k
  394      to be consumed per connection. By opening many simulataneous connections an
  395      attacker could cause a DoS attack through memory exhaustion.
  396 
  397      This issue was reported to OpenSSL by Quan Luo.
  398      (CVE-2016-2179)
  399      [Matt Caswell]
  400 
  401   *) DTLS replay protection DoS
  402 
  403      A flaw in the DTLS replay attack protection mechanism means that records
  404      that arrive for future epochs update the replay protection "window" before
  405      the MAC for the record has been validated. This could be exploited by an
  406      attacker by sending a record for the next epoch (which does not have to
  407      decrypt or have a valid MAC), with a very large sequence number. This means
  408      that all subsequent legitimate packets are dropped causing a denial of
  409      service for a specific DTLS connection.
  410 
  411      This issue was reported to OpenSSL by the OCAP audit team.
  412      (CVE-2016-2181)
  413      [Matt Caswell]
  414 
  415   *) Certificate message OOB reads
  416 
  417      In OpenSSL 1.0.2 and earlier some missing message length checks can result
  418      in OOB reads of up to 2 bytes beyond an allocated buffer. There is a
  419      theoretical DoS risk but this has not been observed in practice on common
  420      platforms.
  421 
  422      The messages affected are client certificate, client certificate request
  423      and server certificate. As a result the attack can only be performed
  424      against a client or a server which enables client authentication.
  425 
  426      This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
  427      (CVE-2016-6306)
  428      [Stephen Henson]
  429 
  430  Changes between 1.0.2g and 1.0.2h [3 May 2016]
  431 
  432   *) Prevent padding oracle in AES-NI CBC MAC check
  433 
  434      A MITM attacker can use a padding oracle attack to decrypt traffic
  435      when the connection uses an AES CBC cipher and the server support
  436      AES-NI.
  437 
  438      This issue was introduced as part of the fix for Lucky 13 padding
  439      attack (CVE-2013-0169). The padding check was rewritten to be in
  440      constant time by making sure that always the same bytes are read and
  441      compared against either the MAC or padding bytes. But it no longer
  442      checked that there was enough data to have both the MAC and padding
  443      bytes.
  444 
  445      This issue was reported by Juraj Somorovsky using TLS-Attacker.
  446      (CVE-2016-2107)
  447      [Kurt Roeckx]
  448 
  449   *) Fix EVP_EncodeUpdate overflow
  450 
  451      An overflow can occur in the EVP_EncodeUpdate() function which is used for
  452      Base64 encoding of binary data. If an attacker is able to supply very large
  453      amounts of input data then a length check can overflow resulting in a heap
  454      corruption.
  455 
  456      Internally to OpenSSL the EVP_EncodeUpdate() function is primarly used by
  457      the PEM_write_bio* family of functions. These are mainly used within the
  458      OpenSSL command line applications, so any application which processes data
  459      from an untrusted source and outputs it as a PEM file should be considered
  460      vulnerable to this issue. User applications that call these APIs directly
  461      with large amounts of untrusted data may also be vulnerable.
  462 
  463      This issue was reported by Guido Vranken.
  464      (CVE-2016-2105)
  465      [Matt Caswell]
  466 
  467   *) Fix EVP_EncryptUpdate overflow
  468 
  469      An overflow can occur in the EVP_EncryptUpdate() function. If an attacker
  470      is able to supply very large amounts of input data after a previous call to
  471      EVP_EncryptUpdate() with a partial block then a length check can overflow
  472      resulting in a heap corruption. Following an analysis of all OpenSSL
  473      internal usage of the EVP_EncryptUpdate() function all usage is one of two
  474      forms. The first form is where the EVP_EncryptUpdate() call is known to be
  475      the first called function after an EVP_EncryptInit(), and therefore that
  476      specific call must be safe. The second form is where the length passed to
  477      EVP_EncryptUpdate() can be seen from the code to be some small value and
  478      therefore there is no possibility of an overflow. Since all instances are
  479      one of these two forms, it is believed that there can be no overflows in
  480      internal code due to this problem. It should be noted that
  481      EVP_DecryptUpdate() can call EVP_EncryptUpdate() in certain code paths.
  482      Also EVP_CipherUpdate() is a synonym for EVP_EncryptUpdate(). All instances
  483      of these calls have also been analysed too and it is believed there are no
  484      instances in internal usage where an overflow could occur.
  485 
  486      This issue was reported by Guido Vranken.
  487      (CVE-2016-2106)
  488      [Matt Caswell]
  489 
  490   *) Prevent ASN.1 BIO excessive memory allocation
  491 
  492      When ASN.1 data is read from a BIO using functions such as d2i_CMS_bio()
  493      a short invalid encoding can casuse allocation of large amounts of memory
  494      potentially consuming excessive resources or exhausting memory.
  495 
  496      Any application parsing untrusted data through d2i BIO functions is
  497      affected. The memory based functions such as d2i_X509() are *not* affected.
  498      Since the memory based functions are used by the TLS library, TLS
  499      applications are not affected.
  500 
  501      This issue was reported by Brian Carpenter.
  502      (CVE-2016-2109)
  503      [Stephen Henson]
  504 
  505   *) EBCDIC overread
  506 
  507      ASN1 Strings that are over 1024 bytes can cause an overread in applications
  508      using the X509_NAME_oneline() function on EBCDIC systems. This could result
  509      in arbitrary stack data being returned in the buffer.
  510 
  511      This issue was reported by Guido Vranken.
  512      (CVE-2016-2176)
  513      [Matt Caswell]
  514 
  515   *) Modify behavior of ALPN to invoke callback after SNI/servername
  516      callback, such that updates to the SSL_CTX affect ALPN.
  517      [Todd Short]
  518 
  519   *) Remove LOW from the DEFAULT cipher list.  This removes singles DES from the
  520      default.
  521      [Kurt Roeckx]
  522 
  523   *) Only remove the SSLv2 methods with the no-ssl2-method option. When the
  524      methods are enabled and ssl2 is disabled the methods return NULL.
  525      [Kurt Roeckx]
  526 
  527  Changes between 1.0.2f and 1.0.2g [1 Mar 2016]
  528 
  529   * Disable weak ciphers in SSLv3 and up in default builds of OpenSSL.
  530     Builds that are not configured with "enable-weak-ssl-ciphers" will not
  531     provide any "EXPORT" or "LOW" strength ciphers.
  532     [Viktor Dukhovni]
  533 
  534   * Disable SSLv2 default build, default negotiation and weak ciphers.  SSLv2
  535     is by default disabled at build-time.  Builds that are not configured with
  536     "enable-ssl2" will not support SSLv2.  Even if "enable-ssl2" is used,
  537     users who want to negotiate SSLv2 via the version-flexible SSLv23_method()
  538     will need to explicitly call either of:
  539 
  540         SSL_CTX_clear_options(ctx, SSL_OP_NO_SSLv2);
  541     or
  542         SSL_clear_options(ssl, SSL_OP_NO_SSLv2);
  543 
  544     as appropriate.  Even if either of those is used, or the application
  545     explicitly uses the version-specific SSLv2_method() or its client and
  546     server variants, SSLv2 ciphers vulnerable to exhaustive search key
  547     recovery have been removed.  Specifically, the SSLv2 40-bit EXPORT
  548     ciphers, and SSLv2 56-bit DES are no longer available.
  549     (CVE-2016-0800)
  550     [Viktor Dukhovni]
  551 
  552   *) Fix a double-free in DSA code
  553 
  554      A double free bug was discovered when OpenSSL parses malformed DSA private
  555      keys and could lead to a DoS attack or memory corruption for applications
  556      that receive DSA private keys from untrusted sources.  This scenario is
  557      considered rare.
  558 
  559      This issue was reported to OpenSSL by Adam Langley(Google/BoringSSL) using
  560      libFuzzer.
  561      (CVE-2016-0705)
  562      [Stephen Henson]
  563 
  564   *) Disable SRP fake user seed to address a server memory leak.
  565 
  566      Add a new method SRP_VBASE_get1_by_user that handles the seed properly.
  567 
  568      SRP_VBASE_get_by_user had inconsistent memory management behaviour.
  569      In order to fix an unavoidable memory leak, SRP_VBASE_get_by_user
  570      was changed to ignore the "fake user" SRP seed, even if the seed
  571      is configured.
  572 
  573      Users should use SRP_VBASE_get1_by_user instead. Note that in
  574      SRP_VBASE_get1_by_user, caller must free the returned value. Note
  575      also that even though configuring the SRP seed attempts to hide
  576      invalid usernames by continuing the handshake with fake
  577      credentials, this behaviour is not constant time and no strong
  578      guarantees are made that the handshake is indistinguishable from
  579      that of a valid user.
  580      (CVE-2016-0798)
  581      [Emilia Käsper]
  582 
  583   *) Fix BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption
  584 
  585      In the BN_hex2bn function the number of hex digits is calculated using an
  586      int value |i|. Later |bn_expand| is called with a value of |i * 4|. For
  587      large values of |i| this can result in |bn_expand| not allocating any
  588      memory because |i * 4| is negative. This can leave the internal BIGNUM data
  589      field as NULL leading to a subsequent NULL ptr deref. For very large values
  590      of |i|, the calculation |i * 4| could be a positive value smaller than |i|.
  591      In this case memory is allocated to the internal BIGNUM data field, but it
  592      is insufficiently sized leading to heap corruption. A similar issue exists
  593      in BN_dec2bn. This could have security consequences if BN_hex2bn/BN_dec2bn
  594      is ever called by user applications with very large untrusted hex/dec data.
  595      This is anticipated to be a rare occurrence.
  596 
  597      All OpenSSL internal usage of these functions use data that is not expected
  598      to be untrusted, e.g. config file data or application command line
  599      arguments. If user developed applications generate config file data based
  600      on untrusted data then it is possible that this could also lead to security
  601      consequences. This is also anticipated to be rare.
  602 
  603      This issue was reported to OpenSSL by Guido Vranken.
  604      (CVE-2016-0797)
  605      [Matt Caswell]
  606 
  607   *) Fix memory issues in BIO_*printf functions
  608 
  609      The internal |fmtstr| function used in processing a "%s" format string in
  610      the BIO_*printf functions could overflow while calculating the length of a
  611      string and cause an OOB read when printing very long strings.
  612 
  613      Additionally the internal |doapr_outch| function can attempt to write to an
  614      OOB memory location (at an offset from the NULL pointer) in the event of a
  615      memory allocation failure. In 1.0.2 and below this could be caused where
  616      the size of a buffer to be allocated is greater than INT_MAX. E.g. this
  617      could be in processing a very long "%s" format string. Memory leaks can
  618      also occur.
  619 
  620      The first issue may mask the second issue dependent on compiler behaviour.
  621      These problems could enable attacks where large amounts of untrusted data
  622      is passed to the BIO_*printf functions. If applications use these functions
  623      in this way then they could be vulnerable. OpenSSL itself uses these
  624      functions when printing out human-readable dumps of ASN.1 data. Therefore
  625      applications that print this data could be vulnerable if the data is from
  626      untrusted sources. OpenSSL command line applications could also be
  627      vulnerable where they print out ASN.1 data, or if untrusted data is passed
  628      as command line arguments.
  629 
  630      Libssl is not considered directly vulnerable. Additionally certificates etc
  631      received via remote connections via libssl are also unlikely to be able to
  632      trigger these issues because of message size limits enforced within libssl.
  633 
  634      This issue was reported to OpenSSL Guido Vranken.
  635      (CVE-2016-0799)
  636      [Matt Caswell]
  637 
  638   *) Side channel attack on modular exponentiation
  639 
  640      A side-channel attack was found which makes use of cache-bank conflicts on
  641      the Intel Sandy-Bridge microarchitecture which could lead to the recovery
  642      of RSA keys.  The ability to exploit this issue is limited as it relies on
  643      an attacker who has control of code in a thread running on the same
  644      hyper-threaded core as the victim thread which is performing decryptions.
  645 
  646      This issue was reported to OpenSSL by Yuval Yarom, The University of
  647      Adelaide and NICTA, Daniel Genkin, Technion and Tel Aviv University, and
  648      Nadia Heninger, University of Pennsylvania with more information at
  649      http://cachebleed.info.
  650      (CVE-2016-0702)
  651      [Andy Polyakov]
  652 
  653   *) Change the req app to generate a 2048-bit RSA/DSA key by default,
  654      if no keysize is specified with default_bits. This fixes an
  655      omission in an earlier change that changed all RSA/DSA key generation
  656      apps to use 2048 bits by default.
  657      [Emilia Käsper]
  658 
  659  Changes between 1.0.2e and 1.0.2f [28 Jan 2016]
  660 
  661   *) DH small subgroups
  662 
  663      Historically OpenSSL only ever generated DH parameters based on "safe"
  664      primes. More recently (in version 1.0.2) support was provided for
  665      generating X9.42 style parameter files such as those required for RFC 5114
  666      support. The primes used in such files may not be "safe". Where an
  667      application is using DH configured with parameters based on primes that are
  668      not "safe" then an attacker could use this fact to find a peer's private
  669      DH exponent. This attack requires that the attacker complete multiple
  670      handshakes in which the peer uses the same private DH exponent. For example
  671      this could be used to discover a TLS server's private DH exponent if it's
  672      reusing the private DH exponent or it's using a static DH ciphersuite.
  673 
  674      OpenSSL provides the option SSL_OP_SINGLE_DH_USE for ephemeral DH (DHE) in
  675      TLS. It is not on by default. If the option is not set then the server
  676      reuses the same private DH exponent for the life of the server process and
  677      would be vulnerable to this attack. It is believed that many popular
  678      applications do set this option and would therefore not be at risk.
  679 
  680      The fix for this issue adds an additional check where a "q" parameter is
  681      available (as is the case in X9.42 based parameters). This detects the
  682      only known attack, and is the only possible defense for static DH
  683      ciphersuites. This could have some performance impact.
  684 
  685      Additionally the SSL_OP_SINGLE_DH_USE option has been switched on by
  686      default and cannot be disabled. This could have some performance impact.
  687 
  688      This issue was reported to OpenSSL by Antonio Sanso (Adobe).
  689      (CVE-2016-0701)
  690      [Matt Caswell]
  691 
  692   *) SSLv2 doesn't block disabled ciphers
  693 
  694      A malicious client can negotiate SSLv2 ciphers that have been disabled on
  695      the server and complete SSLv2 handshakes even if all SSLv2 ciphers have
  696      been disabled, provided that the SSLv2 protocol was not also disabled via
  697      SSL_OP_NO_SSLv2.
  698 
  699      This issue was reported to OpenSSL on 26th December 2015 by Nimrod Aviram
  700      and Sebastian Schinzel.
  701      (CVE-2015-3197)
  702      [Viktor Dukhovni]
  703 
  704   *) Reject DH handshakes with parameters shorter than 1024 bits.
  705      [Kurt Roeckx]
  706 
  707  Changes between 1.0.2d and 1.0.2e [3 Dec 2015]
  708 
  709   *) BN_mod_exp may produce incorrect results on x86_64
  710 
  711      There is a carry propagating bug in the x86_64 Montgomery squaring
  712      procedure. No EC algorithms are affected. Analysis suggests that attacks
  713      against RSA and DSA as a result of this defect would be very difficult to
  714      perform and are not believed likely. Attacks against DH are considered just
  715      feasible (although very difficult) because most of the work necessary to
  716      deduce information about a private key may be performed offline. The amount
  717      of resources required for such an attack would be very significant and
  718      likely only accessible to a limited number of attackers. An attacker would
  719      additionally need online access to an unpatched system using the target
  720      private key in a scenario with persistent DH parameters and a private
  721      key that is shared between multiple clients. For example this can occur by
  722      default in OpenSSL DHE based SSL/TLS ciphersuites.
  723 
  724      This issue was reported to OpenSSL by Hanno Böck.
  725      (CVE-2015-3193)
  726      [Andy Polyakov]
  727 
  728   *) Certificate verify crash with missing PSS parameter
  729 
  730      The signature verification routines will crash with a NULL pointer
  731      dereference if presented with an ASN.1 signature using the RSA PSS
  732      algorithm and absent mask generation function parameter. Since these
  733      routines are used to verify certificate signature algorithms this can be
  734      used to crash any certificate verification operation and exploited in a
  735      DoS attack. Any application which performs certificate verification is
  736      vulnerable including OpenSSL clients and servers which enable client
  737      authentication.
  738 
  739      This issue was reported to OpenSSL by Loïc Jonas Etienne (Qnective AG).
  740      (CVE-2015-3194)
  741      [Stephen Henson]
  742 
  743   *) X509_ATTRIBUTE memory leak
  744 
  745      When presented with a malformed X509_ATTRIBUTE structure OpenSSL will leak
  746      memory. This structure is used by the PKCS#7 and CMS routines so any
  747      application which reads PKCS#7 or CMS data from untrusted sources is
  748      affected. SSL/TLS is not affected.
  749 
  750      This issue was reported to OpenSSL by Adam Langley (Google/BoringSSL) using
  751      libFuzzer.
  752      (CVE-2015-3195)
  753      [Stephen Henson]
  754 
  755   *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs.
  756      This changes the decoding behaviour for some invalid messages,
  757      though the change is mostly in the more lenient direction, and
  758      legacy behaviour is preserved as much as possible.
  759      [Emilia Käsper]
  760 
  761   *) In DSA_generate_parameters_ex, if the provided seed is too short,
  762      use a random seed, as already documented.
  763      [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>]
  764 
  765  Changes between 1.0.2c and 1.0.2d [9 Jul 2015]
  766 
  767   *) Alternate chains certificate forgery
  768 
  769      During certificate verfification, OpenSSL will attempt to find an
  770      alternative certificate chain if the first attempt to build such a chain
  771      fails. An error in the implementation of this logic can mean that an
  772      attacker could cause certain checks on untrusted certificates to be
  773      bypassed, such as the CA flag, enabling them to use a valid leaf
  774      certificate to act as a CA and "issue" an invalid certificate.
  775 
  776      This issue was reported to OpenSSL by Adam Langley/David Benjamin
  777      (Google/BoringSSL).
  778      (CVE-2015-1793)
  779      [Matt Caswell]
  780 
  781   *) Race condition handling PSK identify hint
  782 
  783      If PSK identity hints are received by a multi-threaded client then
  784      the values are wrongly updated in the parent SSL_CTX structure. This can
  785      result in a race condition potentially leading to a double free of the
  786      identify hint data.
  787      (CVE-2015-3196)
  788      [Stephen Henson]
  789 
  790  Changes between 1.0.2b and 1.0.2c [12 Jun 2015]
  791 
  792   *) Fix HMAC ABI incompatibility. The previous version introduced an ABI
  793      incompatibility in the handling of HMAC. The previous ABI has now been
  794      restored.
  795 
  796  Changes between 1.0.2a and 1.0.2b [11 Jun 2015]
  797 
  798   *) Malformed ECParameters causes infinite loop
  799 
  800      When processing an ECParameters structure OpenSSL enters an infinite loop
  801      if the curve specified is over a specially malformed binary polynomial
  802      field.
  803 
  804      This can be used to perform denial of service against any
  805      system which processes public keys, certificate requests or
  806      certificates.  This includes TLS clients and TLS servers with
  807      client authentication enabled.
  808 
  809      This issue was reported to OpenSSL by Joseph Barr-Pixton.
  810      (CVE-2015-1788)
  811      [Andy Polyakov]
  812 
  813   *) Exploitable out-of-bounds read in X509_cmp_time
  814 
  815      X509_cmp_time does not properly check the length of the ASN1_TIME
  816      string and can read a few bytes out of bounds. In addition,
  817      X509_cmp_time accepts an arbitrary number of fractional seconds in the
  818      time string.
  819 
  820      An attacker can use this to craft malformed certificates and CRLs of
  821      various sizes and potentially cause a segmentation fault, resulting in
  822      a DoS on applications that verify certificates or CRLs. TLS clients
  823      that verify CRLs are affected. TLS clients and servers with client
  824      authentication enabled may be affected if they use custom verification
  825      callbacks.
  826 
  827      This issue was reported to OpenSSL by Robert Swiecki (Google), and
  828      independently by Hanno Böck.
  829      (CVE-2015-1789)
  830      [Emilia Käsper]
  831 
  832   *) PKCS7 crash with missing EnvelopedContent
  833 
  834      The PKCS#7 parsing code does not handle missing inner EncryptedContent
  835      correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
  836      with missing content and trigger a NULL pointer dereference on parsing.
  837 
  838      Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
  839      structures from untrusted sources are affected. OpenSSL clients and
  840      servers are not affected.
  841 
  842      This issue was reported to OpenSSL by Michal Zalewski (Google).
  843      (CVE-2015-1790)
  844      [Emilia Käsper]
  845 
  846   *) CMS verify infinite loop with unknown hash function
  847 
  848      When verifying a signedData message the CMS code can enter an infinite loop
  849      if presented with an unknown hash function OID. This can be used to perform
  850      denial of service against any system which verifies signedData messages using
  851      the CMS code.
  852      This issue was reported to OpenSSL by Johannes Bauer.
  853      (CVE-2015-1792)
  854      [Stephen Henson]
  855 
  856   *) Race condition handling NewSessionTicket
  857 
  858      If a NewSessionTicket is received by a multi-threaded client when attempting to
  859      reuse a previous ticket then a race condition can occur potentially leading to
  860      a double free of the ticket data.
  861      (CVE-2015-1791)
  862      [Matt Caswell]
  863 
  864   *) Removed support for the two export grade static DH ciphersuites
  865      EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites
  866      were newly added (along with a number of other static DH ciphersuites) to
  867      1.0.2. However the two export ones have *never* worked since they were
  868      introduced. It seems strange in any case to be adding new export
  869      ciphersuites, and given "logjam" it also does not seem correct to fix them.
  870      [Matt Caswell]
  871 
  872   *) Only support 256-bit or stronger elliptic curves with the
  873      'ecdh_auto' setting (server) or by default (client). Of supported
  874      curves, prefer P-256 (both).
  875      [Emilia Kasper]
  876 
  877   *) Reject DH handshakes with parameters shorter than 768 bits.
  878      [Kurt Roeckx and Emilia Kasper]
  879 
  880  Changes between 1.0.2 and 1.0.2a [19 Mar 2015]
  881 
  882   *) ClientHello sigalgs DoS fix
  883 
  884      If a client connects to an OpenSSL 1.0.2 server and renegotiates with an
  885      invalid signature algorithms extension a NULL pointer dereference will
  886      occur. This can be exploited in a DoS attack against the server.
  887 
  888      This issue was was reported to OpenSSL by David Ramos of Stanford
  889      University.
  890      (CVE-2015-0291)
  891      [Stephen Henson and Matt Caswell]
  892 
  893   *) Multiblock corrupted pointer fix
  894 
  895      OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
  896      feature only applies on 64 bit x86 architecture platforms that support AES
  897      NI instructions. A defect in the implementation of "multiblock" can cause
  898      OpenSSL's internal write buffer to become incorrectly set to NULL when
  899      using non-blocking IO. Typically, when the user application is using a
  900      socket BIO for writing, this will only result in a failed connection.
  901      However if some other BIO is used then it is likely that a segmentation
  902      fault will be triggered, thus enabling a potential DoS attack.
  903 
  904      This issue was reported to OpenSSL by Daniel Danner and Rainer Mueller.
  905      (CVE-2015-0290)
  906      [Matt Caswell]
  907 
  908   *) Segmentation fault in DTLSv1_listen fix
  909 
  910      The DTLSv1_listen function is intended to be stateless and processes the
  911      initial ClientHello from many peers. It is common for user code to loop
  912      over the call to DTLSv1_listen until a valid ClientHello is received with
  913      an associated cookie. A defect in the implementation of DTLSv1_listen means
  914      that state is preserved in the SSL object from one invocation to the next
  915      that can lead to a segmentation fault. Errors processing the initial
  916      ClientHello can trigger this scenario. An example of such an error could be
  917      that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
  918      server.
  919 
  920      This issue was reported to OpenSSL by Per Allansson.
  921      (CVE-2015-0207)
  922      [Matt Caswell]
  923 
  924   *) Segmentation fault in ASN1_TYPE_cmp fix
  925 
  926      The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
  927      made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
  928      certificate signature algorithm consistency this can be used to crash any
  929      certificate verification operation and exploited in a DoS attack. Any
  930      application which performs certificate verification is vulnerable including
  931      OpenSSL clients and servers which enable client authentication.
  932      (CVE-2015-0286)
  933      [Stephen Henson]
  934 
  935   *) Segmentation fault for invalid PSS parameters fix
  936 
  937      The signature verification routines will crash with a NULL pointer
  938      dereference if presented with an ASN.1 signature using the RSA PSS
  939      algorithm and invalid parameters. Since these routines are used to verify
  940      certificate signature algorithms this can be used to crash any
  941      certificate verification operation and exploited in a DoS attack. Any
  942      application which performs certificate verification is vulnerable including
  943      OpenSSL clients and servers which enable client authentication.
  944 
  945      This issue was was reported to OpenSSL by Brian Carpenter.
  946      (CVE-2015-0208)
  947      [Stephen Henson]
  948 
  949   *) ASN.1 structure reuse memory corruption fix
  950 
  951      Reusing a structure in ASN.1 parsing may allow an attacker to cause
  952      memory corruption via an invalid write. Such reuse is and has been
  953      strongly discouraged and is believed to be rare.
  954 
  955      Applications that parse structures containing CHOICE or ANY DEFINED BY
  956      components may be affected. Certificate parsing (d2i_X509 and related
  957      functions) are however not affected. OpenSSL clients and servers are
  958      not affected.
  959      (CVE-2015-0287)
  960      [Stephen Henson]
  961 
  962   *) PKCS7 NULL pointer dereferences fix
  963 
  964      The PKCS#7 parsing code does not handle missing outer ContentInfo
  965      correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
  966      missing content and trigger a NULL pointer dereference on parsing.
  967 
  968      Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
  969      otherwise parse PKCS#7 structures from untrusted sources are
  970      affected. OpenSSL clients and servers are not affected.
  971 
  972      This issue was reported to OpenSSL by Michal Zalewski (Google).
  973      (CVE-2015-0289)
  974      [Emilia Käsper]
  975 
  976   *) DoS via reachable assert in SSLv2 servers fix
  977 
  978      A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
  979      servers that both support SSLv2 and enable export cipher suites by sending
  980      a specially crafted SSLv2 CLIENT-MASTER-KEY message.
  981 
  982      This issue was discovered by Sean Burford (Google) and Emilia Käsper
  983      (OpenSSL development team).
  984      (CVE-2015-0293)
  985      [Emilia Käsper]
  986 
  987   *) Empty CKE with client auth and DHE fix
  988 
  989      If client auth is used then a server can seg fault in the event of a DHE
  990      ciphersuite being selected and a zero length ClientKeyExchange message
  991      being sent by the client. This could be exploited in a DoS attack.
  992      (CVE-2015-1787)
  993      [Matt Caswell]
  994 
  995   *) Handshake with unseeded PRNG fix
  996 
  997      Under certain conditions an OpenSSL 1.0.2 client can complete a handshake
  998      with an unseeded PRNG. The conditions are:
  999      - The client is on a platform where the PRNG has not been seeded
 1000      automatically, and the user has not seeded manually
 1001      - A protocol specific client method version has been used (i.e. not
 1002      SSL_client_methodv23)
 1003      - A ciphersuite is used that does not require additional random data from
 1004      the PRNG beyond the initial ClientHello client random (e.g. PSK-RC4-SHA).
 1005 
 1006      If the handshake succeeds then the client random that has been used will
 1007      have been generated from a PRNG with insufficient entropy and therefore the
 1008      output may be predictable.
 1009 
 1010      For example using the following command with an unseeded openssl will
 1011      succeed on an unpatched platform:
 1012 
 1013      openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
 1014      (CVE-2015-0285)
 1015      [Matt Caswell]
 1016 
 1017   *) Use After Free following d2i_ECPrivatekey error fix
 1018 
 1019      A malformed EC private key file consumed via the d2i_ECPrivateKey function
 1020      could cause a use after free condition. This, in turn, could cause a double
 1021      free in several private key parsing functions (such as d2i_PrivateKey
 1022      or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
 1023      for applications that receive EC private keys from untrusted
 1024      sources. This scenario is considered rare.
 1025 
 1026      This issue was discovered by the BoringSSL project and fixed in their
 1027      commit 517073cd4b.
 1028      (CVE-2015-0209)
 1029      [Matt Caswell]
 1030 
 1031   *) X509_to_X509_REQ NULL pointer deref fix
 1032 
 1033      The function X509_to_X509_REQ will crash with a NULL pointer dereference if
 1034      the certificate key is invalid. This function is rarely used in practice.
 1035 
 1036      This issue was discovered by Brian Carpenter.
 1037      (CVE-2015-0288)
 1038      [Stephen Henson]
 1039 
 1040   *) Removed the export ciphers from the DEFAULT ciphers
 1041      [Kurt Roeckx]
 1042 
 1043  Changes between 1.0.1l and 1.0.2 [22 Jan 2015]
 1044 
 1045   *) Change RSA and DH/DSA key generation apps to generate 2048-bit
 1046      keys by default.
 1047      [Kurt Roeckx]
 1048 
 1049   *) Facilitate "universal" ARM builds targeting range of ARM ISAs, e.g.
 1050      ARMv5 through ARMv8, as opposite to "locking" it to single one.
 1051      So far those who have to target multiple plaforms would compromise
 1052      and argue that binary targeting say ARMv5 would still execute on
 1053      ARMv8. "Universal" build resolves this compromise by providing
 1054      near-optimal performance even on newer platforms.
 1055      [Andy Polyakov]
 1056 
 1057   *) Accelerated NIST P-256 elliptic curve implementation for x86_64
 1058      (other platforms pending).
 1059      [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
 1060 
 1061   *) Add support for the SignedCertificateTimestampList certificate and
 1062      OCSP response extensions from RFC6962.
 1063      [Rob Stradling]
 1064 
 1065   *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
 1066      for corner cases. (Certain input points at infinity could lead to
 1067      bogus results, with non-infinity inputs mapped to infinity too.)
 1068      [Bodo Moeller]
 1069 
 1070   *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
 1071      This covers AES, SHA256/512 and GHASH. "Initial" means that most
 1072      common cases are optimized and there still is room for further
 1073      improvements. Vector Permutation AES for Altivec is also added.
 1074      [Andy Polyakov]
 1075 
 1076   *) Add support for little-endian ppc64 Linux target.
 1077      [Marcelo Cerri (IBM)]
 1078 
 1079   *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
 1080      SHA1, SHA256 and GHASH. "Initial" means that most common cases
 1081      are optimized and there still is room for further improvements.
 1082      Both 32- and 64-bit modes are supported.
 1083      [Andy Polyakov, Ard Biesheuvel (Linaro)]
 1084 
 1085   *) Improved ARMv7 NEON support.
 1086      [Andy Polyakov]
 1087 
 1088   *) Support for SPARC Architecture 2011 crypto extensions, first
 1089      implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
 1090      SHA256/512, MD5, GHASH and modular exponentiation.
 1091      [Andy Polyakov, David Miller]
 1092 
 1093   *) Accelerated modular exponentiation for Intel processors, a.k.a.
 1094      RSAZ.
 1095      [Shay Gueron & Vlad Krasnov (Intel Corp)]
 1096 
 1097   *) Support for new and upcoming Intel processors, including AVX2,
 1098      BMI and SHA ISA extensions. This includes additional "stitched"
 1099      implementations, AESNI-SHA256 and GCM, and multi-buffer support
 1100      for TLS encrypt.
 1101 
 1102      This work was sponsored by Intel Corp.
 1103      [Andy Polyakov]
 1104 
 1105   *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
 1106      supports both DTLS 1.2 and 1.0 and should use whatever version the peer
 1107      supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
 1108      [Steve Henson]
 1109 
 1110   *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
 1111      this fixes a limiation in previous versions of OpenSSL.
 1112      [Steve Henson]
 1113 
 1114   *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
 1115      MGF1 digest and OAEP label.
 1116      [Steve Henson]
 1117 
 1118   *) Add EVP support for key wrapping algorithms, to avoid problems with
 1119      existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
 1120      the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
 1121      algorithms and include tests cases.
 1122      [Steve Henson]
 1123 
 1124   *) Add functions to allocate and set the fields of an ECDSA_METHOD
 1125      structure.
 1126      [Douglas E. Engert, Steve Henson]
 1127 
 1128   *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
 1129      difference in days and seconds between two tm or ASN1_TIME structures.
 1130      [Steve Henson]
 1131 
 1132   *) Add -rev test option to s_server to just reverse order of characters
 1133      received by client and send back to server. Also prints an abbreviated
 1134      summary of the connection parameters.
 1135      [Steve Henson]
 1136 
 1137   *) New option -brief for s_client and s_server to print out a brief summary
 1138      of connection parameters.
 1139      [Steve Henson]
 1140 
 1141   *) Add callbacks for arbitrary TLS extensions.
 1142      [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
 1143 
 1144   *) New option -crl_download in several openssl utilities to download CRLs
 1145      from CRLDP extension in certificates.
 1146      [Steve Henson]
 1147 
 1148   *) New options -CRL and -CRLform for s_client and s_server for CRLs.
 1149      [Steve Henson]
 1150 
 1151   *) New function X509_CRL_diff to generate a delta CRL from the difference
 1152      of two full CRLs. Add support to "crl" utility.
 1153      [Steve Henson]
 1154 
 1155   *) New functions to set lookup_crls function and to retrieve
 1156      X509_STORE from X509_STORE_CTX.
 1157      [Steve Henson]
 1158 
 1159   *) Print out deprecated issuer and subject unique ID fields in
 1160      certificates.
 1161      [Steve Henson]
 1162 
 1163   *) Extend OCSP I/O functions so they can be used for simple general purpose
 1164      HTTP as well as OCSP. New wrapper function which can be used to download
 1165      CRLs using the OCSP API.
 1166      [Steve Henson]
 1167 
 1168   *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
 1169      [Steve Henson]
 1170 
 1171   *) SSL_CONF* functions. These provide a common framework for application
 1172      configuration using configuration files or command lines.
 1173      [Steve Henson]
 1174 
 1175   *) SSL/TLS tracing code. This parses out SSL/TLS records using the
 1176      message callback and prints the results. Needs compile time option
 1177      "enable-ssl-trace". New options to s_client and s_server to enable
 1178      tracing.
 1179      [Steve Henson]
 1180 
 1181   *) New ctrl and macro to retrieve supported points extensions.
 1182      Print out extension in s_server and s_client.
 1183      [Steve Henson]
 1184 
 1185   *) New functions to retrieve certificate signature and signature
 1186      OID NID.
 1187      [Steve Henson]
 1188 
 1189   *) Add functions to retrieve and manipulate the raw cipherlist sent by a
 1190      client to OpenSSL.
 1191      [Steve Henson]
 1192 
 1193   *) New Suite B modes for TLS code. These use and enforce the requirements
 1194      of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
 1195      only use Suite B curves. The Suite B modes can be set by using the
 1196      strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
 1197      [Steve Henson]
 1198 
 1199   *) New chain verification flags for Suite B levels of security. Check
 1200      algorithms are acceptable when flags are set in X509_verify_cert.
 1201      [Steve Henson]
 1202 
 1203   *) Make tls1_check_chain return a set of flags indicating checks passed
 1204      by a certificate chain. Add additional tests to handle client
 1205      certificates: checks for matching certificate type and issuer name
 1206      comparison.
 1207      [Steve Henson]
 1208 
 1209   *) If an attempt is made to use a signature algorithm not in the peer
 1210      preference list abort the handshake. If client has no suitable
 1211      signature algorithms in response to a certificate request do not
 1212      use the certificate.
 1213      [Steve Henson]
 1214 
 1215   *) If server EC tmp key is not in client preference list abort handshake.
 1216      [Steve Henson]
 1217 
 1218   *) Add support for certificate stores in CERT structure. This makes it
 1219      possible to have different stores per SSL structure or one store in
 1220      the parent SSL_CTX. Include distint stores for certificate chain
 1221      verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
 1222      to build and store a certificate chain in CERT structure: returing
 1223      an error if the chain cannot be built: this will allow applications
 1224      to test if a chain is correctly configured.
 1225 
 1226      Note: if the CERT based stores are not set then the parent SSL_CTX
 1227      store is used to retain compatibility with existing behaviour.
 1228 
 1229      [Steve Henson]
 1230 
 1231   *) New function ssl_set_client_disabled to set a ciphersuite disabled
 1232      mask based on the current session, check mask when sending client
 1233      hello and checking the requested ciphersuite.
 1234      [Steve Henson]
 1235 
 1236   *) New ctrls to retrieve and set certificate types in a certificate
 1237      request message. Print out received values in s_client. If certificate
 1238      types is not set with custom values set sensible values based on
 1239      supported signature algorithms.
 1240      [Steve Henson]
 1241 
 1242   *) Support for distinct client and server supported signature algorithms.
 1243      [Steve Henson]
 1244 
 1245   *) Add certificate callback. If set this is called whenever a certificate
 1246      is required by client or server. An application can decide which
 1247      certificate chain to present based on arbitrary criteria: for example
 1248      supported signature algorithms. Add very simple example to s_server.
 1249      This fixes many of the problems and restrictions of the existing client
 1250      certificate callback: for example you can now clear an existing
 1251      certificate and specify the whole chain.
 1252      [Steve Henson]
 1253 
 1254   *) Add new "valid_flags" field to CERT_PKEY structure which determines what
 1255      the certificate can be used for (if anything). Set valid_flags field 
 1256      in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
 1257      to have similar checks in it.
 1258 
 1259      Add new "cert_flags" field to CERT structure and include a "strict mode".
 1260      This enforces some TLS certificate requirements (such as only permitting
 1261      certificate signature algorithms contained in the supported algorithms
 1262      extension) which some implementations ignore: this option should be used
 1263      with caution as it could cause interoperability issues.
 1264      [Steve Henson]
 1265 
 1266   *) Update and tidy signature algorithm extension processing. Work out
 1267      shared signature algorithms based on preferences and peer algorithms
 1268      and print them out in s_client and s_server. Abort handshake if no
 1269      shared signature algorithms.
 1270      [Steve Henson]
 1271 
 1272   *) Add new functions to allow customised supported signature algorithms
 1273      for SSL and SSL_CTX structures. Add options to s_client and s_server
 1274      to support them.
 1275      [Steve Henson]
 1276 
 1277   *) New function SSL_certs_clear() to delete all references to certificates
 1278      from an SSL structure. Before this once a certificate had been added
 1279      it couldn't be removed.
 1280      [Steve Henson]
 1281 
 1282   *) Integrate hostname, email address and IP address checking with certificate
 1283      verification. New verify options supporting checking in opensl utility.
 1284      [Steve Henson]
 1285 
 1286   *) Fixes and wildcard matching support to hostname and email checking
 1287      functions. Add manual page.
 1288      [Florian Weimer (Red Hat Product Security Team)]
 1289 
 1290   *) New functions to check a hostname email or IP address against a
 1291      certificate. Add options x509 utility to print results of checks against
 1292      a certificate.
 1293      [Steve Henson]
 1294 
 1295   *) Fix OCSP checking.
 1296      [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
 1297 
 1298   *) Initial experimental support for explicitly trusted non-root CAs. 
 1299      OpenSSL still tries to build a complete chain to a root but if an
 1300      intermediate CA has a trust setting included that is used. The first
 1301      setting is used: whether to trust (e.g., -addtrust option to the x509
 1302      utility) or reject.
 1303      [Steve Henson]
 1304 
 1305   *) Add -trusted_first option which attempts to find certificates in the
 1306      trusted store even if an untrusted chain is also supplied.
 1307      [Steve Henson]
 1308 
 1309   *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
 1310      platform support for Linux and Android.
 1311      [Andy Polyakov]
 1312 
 1313   *) Support for linux-x32, ILP32 environment in x86_64 framework.
 1314      [Andy Polyakov]
 1315 
 1316   *) Experimental multi-implementation support for FIPS capable OpenSSL.
 1317      When in FIPS mode the approved implementations are used as normal,
 1318      when not in FIPS mode the internal unapproved versions are used instead.
 1319      This means that the FIPS capable OpenSSL isn't forced to use the
 1320      (often lower perfomance) FIPS implementations outside FIPS mode.
 1321      [Steve Henson]
 1322 
 1323   *) Transparently support X9.42 DH parameters when calling
 1324      PEM_read_bio_DHparameters. This means existing applications can handle
 1325      the new parameter format automatically.
 1326      [Steve Henson]
 1327 
 1328   *) Initial experimental support for X9.42 DH parameter format: mainly
 1329      to support use of 'q' parameter for RFC5114 parameters.
 1330      [Steve Henson]
 1331 
 1332   *) Add DH parameters from RFC5114 including test data to dhtest.
 1333      [Steve Henson]
 1334 
 1335   *) Support for automatic EC temporary key parameter selection. If enabled
 1336      the most preferred EC parameters are automatically used instead of
 1337      hardcoded fixed parameters. Now a server just has to call:
 1338      SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
 1339      support ECDH and use the most appropriate parameters.
 1340      [Steve Henson]
 1341 
 1342   *) Enhance and tidy EC curve and point format TLS extension code. Use
 1343      static structures instead of allocation if default values are used.
 1344      New ctrls to set curves we wish to support and to retrieve shared curves.
 1345      Print out shared curves in s_server. New options to s_server and s_client
 1346      to set list of supported curves.
 1347      [Steve Henson]
 1348 
 1349   *) New ctrls to retrieve supported signature algorithms and 
 1350      supported curve values as an array of NIDs. Extend openssl utility
 1351      to print out received values.
 1352      [Steve Henson]
 1353 
 1354   *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
 1355      between NIDs and the more common NIST names such as "P-256". Enhance
 1356      ecparam utility and ECC method to recognise the NIST names for curves.
 1357      [Steve Henson]
 1358 
 1359   *) Enhance SSL/TLS certificate chain handling to support different
 1360      chains for each certificate instead of one chain in the parent SSL_CTX.
 1361      [Steve Henson]
 1362 
 1363   *) Support for fixed DH ciphersuite client authentication: where both
 1364      server and client use DH certificates with common parameters.
 1365      [Steve Henson]
 1366 
 1367   *) Support for fixed DH ciphersuites: those requiring DH server
 1368      certificates.
 1369      [Steve Henson]
 1370 
 1371   *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
 1372      the certificate.
 1373      Note: Related 1.0.2-beta specific macros X509_get_cert_info,
 1374      X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
 1375      X509_CINF_get_signature were reverted post internal team review.
 1376 
 1377  Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
 1378 
 1379   *) Build fixes for the Windows and OpenVMS platforms
 1380      [Matt Caswell and Richard Levitte]
 1381 
 1382  Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
 1383 
 1384   *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
 1385      message can cause a segmentation fault in OpenSSL due to a NULL pointer
 1386      dereference. This could lead to a Denial Of Service attack. Thanks to
 1387      Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
 1388      (CVE-2014-3571)
 1389      [Steve Henson]
 1390 
 1391   *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
 1392      dtls1_buffer_record function under certain conditions. In particular this
 1393      could occur if an attacker sent repeated DTLS records with the same
 1394      sequence number but for the next epoch. The memory leak could be exploited
 1395      by an attacker in a Denial of Service attack through memory exhaustion.
 1396      Thanks to Chris Mueller for reporting this issue.
 1397      (CVE-2015-0206)
 1398      [Matt Caswell]
 1399 
 1400   *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
 1401      built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
 1402      method would be set to NULL which could later result in a NULL pointer
 1403      dereference. Thanks to Frank Schmirler for reporting this issue.
 1404      (CVE-2014-3569)
 1405      [Kurt Roeckx]
 1406 
 1407   *) Abort handshake if server key exchange message is omitted for ephemeral
 1408      ECDH ciphersuites.
 1409 
 1410      Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
 1411      reporting this issue.
 1412      (CVE-2014-3572)
 1413      [Steve Henson]
 1414 
 1415   *) Remove non-export ephemeral RSA code on client and server. This code
 1416      violated the TLS standard by allowing the use of temporary RSA keys in
 1417      non-export ciphersuites and could be used by a server to effectively
 1418      downgrade the RSA key length used to a value smaller than the server
 1419      certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
 1420      INRIA or reporting this issue.
 1421      (CVE-2015-0204)
 1422      [Steve Henson]
 1423 
 1424   *) Fixed issue where DH client certificates are accepted without verification.
 1425      An OpenSSL server will accept a DH certificate for client authentication
 1426      without the certificate verify message. This effectively allows a client to
 1427      authenticate without the use of a private key. This only affects servers
 1428      which trust a client certificate authority which issues certificates
 1429      containing DH keys: these are extremely rare and hardly ever encountered.
 1430      Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
 1431      this issue.
 1432      (CVE-2015-0205)
 1433      [Steve Henson]
 1434 
 1435   *) Ensure that the session ID context of an SSL is updated when its
 1436      SSL_CTX is updated via SSL_set_SSL_CTX.
 1437 
 1438      The session ID context is typically set from the parent SSL_CTX,
 1439      and can vary with the CTX.
 1440      [Adam Langley]
 1441 
 1442   *) Fix various certificate fingerprint issues.
 1443 
 1444      By using non-DER or invalid encodings outside the signed portion of a
 1445      certificate the fingerprint can be changed without breaking the signature.
 1446      Although no details of the signed portion of the certificate can be changed
 1447      this can cause problems with some applications: e.g. those using the
 1448      certificate fingerprint for blacklists.
 1449 
 1450      1. Reject signatures with non zero unused bits.
 1451 
 1452      If the BIT STRING containing the signature has non zero unused bits reject
 1453      the signature. All current signature algorithms require zero unused bits.
 1454 
 1455      2. Check certificate algorithm consistency.
 1456 
 1457      Check the AlgorithmIdentifier inside TBS matches the one in the
 1458      certificate signature. NB: this will result in signature failure
 1459      errors for some broken certificates.
 1460 
 1461      Thanks to Konrad Kraszewski from Google for reporting this issue.
 1462 
 1463      3. Check DSA/ECDSA signatures use DER.
 1464 
 1465      Reencode DSA/ECDSA signatures and compare with the original received
 1466      signature. Return an error if there is a mismatch.
 1467 
 1468      This will reject various cases including garbage after signature
 1469      (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
 1470      program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
 1471      (negative or with leading zeroes).
 1472 
 1473      Further analysis was conducted and fixes were developed by Stephen Henson
 1474      of the OpenSSL core team.
 1475 
 1476      (CVE-2014-8275)
 1477      [Steve Henson]
 1478 
 1479    *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
 1480       results on some platforms, including x86_64. This bug occurs at random
 1481       with a very low probability, and is not known to be exploitable in any
 1482       way, though its exact impact is difficult to determine. Thanks to Pieter
 1483       Wuille (Blockstream) who reported this issue and also suggested an initial
 1484       fix. Further analysis was conducted by the OpenSSL development team and
 1485       Adam Langley of Google. The final fix was developed by Andy Polyakov of
 1486       the OpenSSL core team.
 1487       (CVE-2014-3570)
 1488       [Andy Polyakov]
 1489 
 1490    *) Do not resume sessions on the server if the negotiated protocol
 1491       version does not match the session's version. Resuming with a different
 1492       version, while not strictly forbidden by the RFC, is of questionable
 1493       sanity and breaks all known clients.
 1494       [David Benjamin, Emilia Käsper]
 1495 
 1496    *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
 1497       early CCS messages during renegotiation. (Note that because
 1498       renegotiation is encrypted, this early CCS was not exploitable.)
 1499       [Emilia Käsper]
 1500 
 1501    *) Tighten client-side session ticket handling during renegotiation:
 1502       ensure that the client only accepts a session ticket if the server sends
 1503       the extension anew in the ServerHello. Previously, a TLS client would
 1504       reuse the old extension state and thus accept a session ticket if one was
 1505       announced in the initial ServerHello.
 1506 
 1507       Similarly, ensure that the client requires a session ticket if one
 1508       was advertised in the ServerHello. Previously, a TLS client would
 1509       ignore a missing NewSessionTicket message.
 1510       [Emilia Käsper]
 1511 
 1512  Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
 1513 
 1514   *) SRTP Memory Leak.
 1515 
 1516      A flaw in the DTLS SRTP extension parsing code allows an attacker, who
 1517      sends a carefully crafted handshake message, to cause OpenSSL to fail
 1518      to free up to 64k of memory causing a memory leak. This could be
 1519      exploited in a Denial Of Service attack. This issue affects OpenSSL
 1520      1.0.1 server implementations for both SSL/TLS and DTLS regardless of
 1521      whether SRTP is used or configured. Implementations of OpenSSL that
 1522      have been compiled with OPENSSL_NO_SRTP defined are not affected.
 1523 
 1524      The fix was developed by the OpenSSL team.
 1525      (CVE-2014-3513)
 1526      [OpenSSL team]
 1527 
 1528   *) Session Ticket Memory Leak.
 1529 
 1530      When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
 1531      integrity of that ticket is first verified. In the event of a session
 1532      ticket integrity check failing, OpenSSL will fail to free memory
 1533      causing a memory leak. By sending a large number of invalid session
 1534      tickets an attacker could exploit this issue in a Denial Of Service
 1535      attack.
 1536      (CVE-2014-3567)
 1537      [Steve Henson]
 1538 
 1539   *) Build option no-ssl3 is incomplete.
 1540 
 1541      When OpenSSL is configured with "no-ssl3" as a build option, servers
 1542      could accept and complete a SSL 3.0 handshake, and clients could be
 1543      configured to send them.
 1544      (CVE-2014-3568)
 1545      [Akamai and the OpenSSL team]
 1546 
 1547   *) Add support for TLS_FALLBACK_SCSV.
 1548      Client applications doing fallback retries should call
 1549      SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
 1550      (CVE-2014-3566)
 1551      [Adam Langley, Bodo Moeller]
 1552 
 1553   *) Add additional DigestInfo checks.
 1554  
 1555      Reencode DigestInto in DER and check against the original when
 1556      verifying RSA signature: this will reject any improperly encoded
 1557      DigestInfo structures.
 1558 
 1559      Note: this is a precautionary measure and no attacks are currently known.
 1560 
 1561      [Steve Henson]
 1562 
 1563  Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
 1564 
 1565   *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
 1566      SRP code can be overrun an internal buffer. Add sanity check that
 1567      g, A, B < N to SRP code.
 1568 
 1569      Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
 1570      Group for discovering this issue.
 1571      (CVE-2014-3512)
 1572      [Steve Henson]
 1573 
 1574   *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
 1575      TLS 1.0 instead of higher protocol versions when the ClientHello message
 1576      is badly fragmented. This allows a man-in-the-middle attacker to force a
 1577      downgrade to TLS 1.0 even if both the server and the client support a
 1578      higher protocol version, by modifying the client's TLS records.
 1579 
 1580      Thanks to David Benjamin and Adam Langley (Google) for discovering and
 1581      researching this issue.
 1582      (CVE-2014-3511)
 1583      [David Benjamin]
 1584 
 1585   *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
 1586      to a denial of service attack. A malicious server can crash the client
 1587      with a null pointer dereference (read) by specifying an anonymous (EC)DH
 1588      ciphersuite and sending carefully crafted handshake messages.
 1589 
 1590      Thanks to Felix Gröbert (Google) for discovering and researching this
 1591      issue.
 1592      (CVE-2014-3510)
 1593      [Emilia Käsper]
 1594 
 1595   *) By sending carefully crafted DTLS packets an attacker could cause openssl
 1596      to leak memory. This can be exploited through a Denial of Service attack.
 1597      Thanks to Adam Langley for discovering and researching this issue.
 1598      (CVE-2014-3507)
 1599      [Adam Langley]
 1600 
 1601   *) An attacker can force openssl to consume large amounts of memory whilst
 1602      processing DTLS handshake messages. This can be exploited through a
 1603      Denial of Service attack.
 1604      Thanks to Adam Langley for discovering and researching this issue.
 1605      (CVE-2014-3506)
 1606      [Adam Langley]
 1607 
 1608   *) An attacker can force an error condition which causes openssl to crash
 1609      whilst processing DTLS packets due to memory being freed twice. This
 1610      can be exploited through a Denial of Service attack.
 1611      Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
 1612      this issue.
 1613      (CVE-2014-3505)
 1614      [Adam Langley]
 1615 
 1616   *) If a multithreaded client connects to a malicious server using a resumed
 1617      session and the server sends an ec point format extension it could write
 1618      up to 255 bytes to freed memory.
 1619 
 1620      Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
 1621      issue.
 1622      (CVE-2014-3509)
 1623      [Gabor Tyukasz]
 1624 
 1625   *) A malicious server can crash an OpenSSL client with a null pointer
 1626      dereference (read) by specifying an SRP ciphersuite even though it was not
 1627      properly negotiated with the client. This can be exploited through a
 1628      Denial of Service attack.
 1629 
 1630      Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
 1631      discovering and researching this issue.
 1632      (CVE-2014-5139)
 1633      [Steve Henson]
 1634 
 1635   *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
 1636      X509_name_oneline, X509_name_print_ex et al. to leak some information
 1637      from the stack. Applications may be affected if they echo pretty printing
 1638      output to the attacker.
 1639 
 1640      Thanks to Ivan Fratric (Google) for discovering this issue.
 1641      (CVE-2014-3508)
 1642      [Emilia Käsper, and Steve Henson]
 1643 
 1644   *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
 1645      for corner cases. (Certain input points at infinity could lead to
 1646      bogus results, with non-infinity inputs mapped to infinity too.)
 1647      [Bodo Moeller]
 1648 
 1649  Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
 1650 
 1651   *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
 1652      handshake can force the use of weak keying material in OpenSSL
 1653      SSL/TLS clients and servers.
 1654 
 1655      Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
 1656      researching this issue. (CVE-2014-0224)
 1657      [KIKUCHI Masashi, Steve Henson]
 1658 
 1659   *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
 1660      OpenSSL DTLS client the code can be made to recurse eventually crashing
 1661      in a DoS attack.
 1662 
 1663      Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
 1664      (CVE-2014-0221)
 1665      [Imre Rad, Steve Henson]
 1666 
 1667   *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
 1668      be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
 1669      client or server. This is potentially exploitable to run arbitrary
 1670      code on a vulnerable client or server.
 1671 
 1672      Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
 1673      [Jüri Aedla, Steve Henson]
 1674 
 1675   *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
 1676      are subject to a denial of service attack.
 1677 
 1678      Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
 1679      this issue. (CVE-2014-3470)
 1680      [Felix Gröbert, Ivan Fratric, Steve Henson]
 1681 
 1682   *) Harmonize version and its documentation. -f flag is used to display
 1683      compilation flags.
 1684      [mancha <mancha1@zoho.com>]
 1685 
 1686   *) Fix eckey_priv_encode so it immediately returns an error upon a failure
 1687      in i2d_ECPrivateKey.  Thanks to Ted Unangst for feedback on this issue.
 1688      [mancha <mancha1@zoho.com>]
 1689 
 1690   *) Fix some double frees. These are not thought to be exploitable.
 1691      [mancha <mancha1@zoho.com>]
 1692 
 1693  Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
 1694 
 1695   *) A missing bounds check in the handling of the TLS heartbeat extension
 1696      can be used to reveal up to 64k of memory to a connected client or
 1697      server.
 1698 
 1699      Thanks for Neel Mehta of Google Security for discovering this bug and to
 1700      Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
 1701      preparing the fix (CVE-2014-0160)
 1702      [Adam Langley, Bodo Moeller]
 1703 
 1704   *) Fix for the attack described in the paper "Recovering OpenSSL
 1705      ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
 1706      by Yuval Yarom and Naomi Benger. Details can be obtained from:
 1707      http://eprint.iacr.org/2014/140
 1708 
 1709      Thanks to Yuval Yarom and Naomi Benger for discovering this
 1710      flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
 1711      [Yuval Yarom and Naomi Benger]
 1712 
 1713   *) TLS pad extension: draft-agl-tls-padding-03
 1714 
 1715      Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
 1716      TLS client Hello record length value would otherwise be > 255 and
 1717      less that 512 pad with a dummy extension containing zeroes so it
 1718      is at least 512 bytes long.
 1719 
 1720      [Adam Langley, Steve Henson]
 1721 
 1722  Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
 1723 
 1724   *) Fix for TLS record tampering bug. A carefully crafted invalid 
 1725      handshake could crash OpenSSL with a NULL pointer exception.
 1726      Thanks to Anton Johansson for reporting this issues.
 1727      (CVE-2013-4353)
 1728 
 1729   *) Keep original DTLS digest and encryption contexts in retransmission
 1730      structures so we can use the previous session parameters if they need
 1731      to be resent. (CVE-2013-6450)
 1732      [Steve Henson]
 1733 
 1734   *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
 1735      avoids preferring ECDHE-ECDSA ciphers when the client appears to be
 1736      Safari on OS X.  Safari on OS X 10.8..10.8.3 advertises support for
 1737      several ECDHE-ECDSA ciphers, but fails to negotiate them.  The bug
 1738      is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
 1739      10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
 1740      [Rob Stradling, Adam Langley]
 1741 
 1742  Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
 1743 
 1744   *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
 1745      supporting platforms or when small records were transferred.
 1746      [Andy Polyakov, Steve Henson]
 1747 
 1748  Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
 1749 
 1750   *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
 1751 
 1752      This addresses the flaw in CBC record processing discovered by 
 1753      Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
 1754      at: http://www.isg.rhul.ac.uk/tls/     
 1755 
 1756      Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
 1757      Security Group at Royal Holloway, University of London
 1758      (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
 1759      Emilia Käsper for the initial patch.
 1760      (CVE-2013-0169)
 1761      [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
 1762 
 1763   *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
 1764      ciphersuites which can be exploited in a denial of service attack.
 1765      Thanks go to and to Adam Langley <agl@chromium.org> for discovering
 1766      and detecting this bug and to Wolfgang Ettlinger
 1767      <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
 1768      (CVE-2012-2686)
 1769      [Adam Langley]
 1770 
 1771   *) Return an error when checking OCSP signatures when key is NULL.
 1772      This fixes a DoS attack. (CVE-2013-0166)
 1773      [Steve Henson]
 1774 
 1775   *) Make openssl verify return errors.
 1776      [Chris Palmer <palmer@google.com> and Ben Laurie]
 1777 
 1778   *) Call OCSP Stapling callback after ciphersuite has been chosen, so
 1779      the right response is stapled. Also change SSL_get_certificate()
 1780      so it returns the certificate actually sent.
 1781      See http://rt.openssl.org/Ticket/Display.html?id=2836.
 1782      [Rob Stradling <rob.stradling@comodo.com>]
 1783 
 1784   *) Fix possible deadlock when decoding public keys.
 1785      [Steve Henson]
 1786 
 1787   *) Don't use TLS 1.0 record version number in initial client hello
 1788      if renegotiating.
 1789      [Steve Henson]
 1790 
 1791  Changes between 1.0.1b and 1.0.1c [10 May 2012]
 1792 
 1793   *) Sanity check record length before skipping explicit IV in TLS
 1794      1.2, 1.1 and DTLS to fix DoS attack.
 1795 
 1796      Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
 1797      fuzzing as a service testing platform.
 1798      (CVE-2012-2333)
 1799      [Steve Henson]
 1800 
 1801   *) Initialise tkeylen properly when encrypting CMS messages.
 1802      Thanks to Solar Designer of Openwall for reporting this issue.
 1803      [Steve Henson]
 1804 
 1805   *) In FIPS mode don't try to use composite ciphers as they are not
 1806      approved.
 1807      [Steve Henson]
 1808 
 1809  Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
 1810 
 1811   *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
 1812      1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
 1813      mean any application compiled against OpenSSL 1.0.0 headers setting
 1814      SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
 1815      TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
 1816      0x10000000L Any application which was previously compiled against
 1817      OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
 1818      will need to be recompiled as a result. Letting be results in
 1819      inability to disable specifically TLS 1.1 and in client context,
 1820      in unlike event, limit maximum offered version to TLS 1.0 [see below].
 1821      [Steve Henson]
 1822 
 1823   *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
 1824      disable just protocol X, but all protocols above X *if* there are
 1825      protocols *below* X still enabled. In more practical terms it means
 1826      that if application wants to disable TLS1.0 in favor of TLS1.1 and
 1827      above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
 1828      SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
 1829      client side.
 1830      [Andy Polyakov]
 1831 
 1832  Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
 1833 
 1834   *) Check for potentially exploitable overflows in asn1_d2i_read_bio
 1835      BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
 1836      in CRYPTO_realloc_clean.
 1837 
 1838      Thanks to Tavis Ormandy, Google Security Team, for discovering this
 1839      issue and to Adam Langley <agl@chromium.org> for fixing it.
 1840      (CVE-2012-2110)
 1841      [Adam Langley (Google), Tavis Ormandy, Google Security Team]
 1842 
 1843   *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
 1844      [Adam Langley]
 1845 
 1846   *) Workarounds for some broken servers that "hang" if a client hello
 1847      record length exceeds 255 bytes.
 1848 
 1849      1. Do not use record version number > TLS 1.0 in initial client
 1850         hello: some (but not all) hanging servers will now work.
 1851      2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
 1852 	the number of ciphers sent in the client hello. This should be
 1853         set to an even number, such as 50, for example by passing:
 1854         -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
 1855         Most broken servers should now work.
 1856      3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
 1857 	TLS 1.2 client support entirely.
 1858      [Steve Henson]
 1859 
 1860   *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
 1861      [Andy Polyakov]
 1862 
 1863  Changes between 1.0.0h and 1.0.1  [14 Mar 2012]
 1864 
 1865   *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
 1866      STRING form instead of a DigestInfo.
 1867      [Steve Henson]
 1868 
 1869   *) The format used for MDC2 RSA signatures is inconsistent between EVP
 1870      and the RSA_sign/RSA_verify functions. This was made more apparent when
 1871      OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
 1872      those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect 
 1873      the correct format in RSA_verify so both forms transparently work.
 1874      [Steve Henson]
 1875 
 1876   *) Some servers which support TLS 1.0 can choke if we initially indicate
 1877      support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
 1878      encrypted premaster secret. As a workaround use the maximum pemitted
 1879      client version in client hello, this should keep such servers happy
 1880      and still work with previous versions of OpenSSL.
 1881      [Steve Henson]
 1882 
 1883   *) Add support for TLS/DTLS heartbeats.
 1884      [Robin Seggelmann <seggelmann@fh-muenster.de>]
 1885 
 1886   *) Add support for SCTP.
 1887      [Robin Seggelmann <seggelmann@fh-muenster.de>]
 1888 
 1889   *) Improved PRNG seeding for VOS.
 1890      [Paul Green <Paul.Green@stratus.com>]
 1891 
 1892   *) Extensive assembler packs updates, most notably:
 1893 
 1894 	- x86[_64]:     AES-NI, PCLMULQDQ, RDRAND support;
 1895 	- x86[_64]:     SSSE3 support (SHA1, vector-permutation AES);
 1896 	- x86_64:       bit-sliced AES implementation;
 1897 	- ARM:          NEON support, contemporary platforms optimizations;
 1898 	- s390x:        z196 support;
 1899 	- *:            GHASH and GF(2^m) multiplication implementations;
 1900 
 1901      [Andy Polyakov]
 1902 
 1903   *) Make TLS-SRP code conformant with RFC 5054 API cleanup
 1904      (removal of unnecessary code)
 1905      [Peter Sylvester <peter.sylvester@edelweb.fr>]
 1906 
 1907   *) Add TLS key material exporter from RFC 5705.
 1908      [Eric Rescorla]
 1909 
 1910   *) Add DTLS-SRTP negotiation from RFC 5764.
 1911      [Eric Rescorla]
 1912 
 1913   *) Add Next Protocol Negotiation,
 1914      http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
 1915      disabled with a no-npn flag to config or Configure. Code donated
 1916      by Google.
 1917      [Adam Langley <agl@google.com> and Ben Laurie]
 1918 
 1919   *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
 1920      NIST-P256, NIST-P521, with constant-time single point multiplication on
 1921      typical inputs. Compiler support for the nonstandard type __uint128_t is
 1922      required to use this (present in gcc 4.4 and later, for 64-bit builds).
 1923      Code made available under Apache License version 2.0.
 1924 
 1925      Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
 1926      line to include this in your build of OpenSSL, and run "make depend" (or
 1927      "make update"). This enables the following EC_METHODs:
 1928 
 1929          EC_GFp_nistp224_method()
 1930          EC_GFp_nistp256_method()
 1931          EC_GFp_nistp521_method()
 1932 
 1933      EC_GROUP_new_by_curve_name() will automatically use these (while
 1934      EC_GROUP_new_curve_GFp() currently prefers the more flexible
 1935      implementations).
 1936      [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
 1937 
 1938   *) Use type ossl_ssize_t instad of ssize_t which isn't available on
 1939      all platforms. Move ssize_t definition from e_os.h to the public
 1940      header file e_os2.h as it now appears in public header file cms.h
 1941      [Steve Henson]
 1942 
 1943   *) New -sigopt option to the ca, req and x509 utilities. Additional
 1944      signature parameters can be passed using this option and in
 1945      particular PSS. 
 1946      [Steve Henson]
 1947 
 1948   *) Add RSA PSS signing function. This will generate and set the
 1949      appropriate AlgorithmIdentifiers for PSS based on those in the
 1950      corresponding EVP_MD_CTX structure. No application support yet.
 1951      [Steve Henson]
 1952 
 1953   *) Support for companion algorithm specific ASN1 signing routines.
 1954      New function ASN1_item_sign_ctx() signs a pre-initialised
 1955      EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
 1956      the appropriate parameters.
 1957      [Steve Henson]
 1958 
 1959   *) Add new algorithm specific ASN1 verification initialisation function
 1960      to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
 1961      handling will be the same no matter what EVP_PKEY_METHOD is used.
 1962      Add a PSS handler to support verification of PSS signatures: checked
 1963      against a number of sample certificates.
 1964      [Steve Henson]
 1965 
 1966   *) Add signature printing for PSS. Add PSS OIDs.
 1967      [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
 1968 
 1969   *) Add algorithm specific signature printing. An individual ASN1 method
 1970      can now print out signatures instead of the standard hex dump. 
 1971 
 1972      More complex signatures (e.g. PSS) can print out more meaningful
 1973      information. Include DSA version that prints out the signature
 1974      parameters r, s.
 1975      [Steve Henson]
 1976 
 1977   *) Password based recipient info support for CMS library: implementing
 1978      RFC3211.
 1979      [Steve Henson]
 1980 
 1981   *) Split password based encryption into PBES2 and PBKDF2 functions. This
 1982      neatly separates the code into cipher and PBE sections and is required
 1983      for some algorithms that split PBES2 into separate pieces (such as
 1984      password based CMS).
 1985      [Steve Henson]
 1986 
 1987   *) Session-handling fixes:
 1988      - Fix handling of connections that are resuming with a session ID,
 1989        but also support Session Tickets.
 1990      - Fix a bug that suppressed issuing of a new ticket if the client
 1991        presented a ticket with an expired session.
 1992      - Try to set the ticket lifetime hint to something reasonable.
 1993      - Make tickets shorter by excluding irrelevant information.
 1994      - On the client side, don't ignore renewed tickets.
 1995      [Adam Langley, Bodo Moeller (Google)]
 1996 
 1997   *) Fix PSK session representation.
 1998      [Bodo Moeller]
 1999 
 2000   *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
 2001 
 2002      This work was sponsored by Intel.
 2003      [Andy Polyakov]
 2004 
 2005   *) Add GCM support to TLS library. Some custom code is needed to split
 2006      the IV between the fixed (from PRF) and explicit (from TLS record)
 2007      portions. This adds all GCM ciphersuites supported by RFC5288 and 
 2008      RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
 2009      add a special AESGCM string for GCM only.
 2010      [Steve Henson]
 2011 
 2012   *) Expand range of ctrls for AES GCM. Permit setting invocation
 2013      field on decrypt and retrieval of invocation field only on encrypt.
 2014      [Steve Henson]
 2015 
 2016   *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
 2017      As required by RFC5289 these ciphersuites cannot be used if for
 2018      versions of TLS earlier than 1.2.
 2019      [Steve Henson]
 2020 
 2021   *) For FIPS capable OpenSSL interpret a NULL default public key method
 2022      as unset and return the appopriate default but do *not* set the default.
 2023      This means we can return the appopriate method in applications that
 2024      swicth between FIPS and non-FIPS modes.
 2025      [Steve Henson]
 2026 
 2027   *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
 2028      ENGINE is used then we cannot handle that in the FIPS module so we
 2029      keep original code iff non-FIPS operations are allowed.
 2030      [Steve Henson]
 2031 
 2032   *) Add -attime option to openssl utilities.
 2033      [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
 2034 
 2035   *) Redirect DSA and DH operations to FIPS module in FIPS mode.
 2036      [Steve Henson]
 2037 
 2038   *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
 2039      FIPS EC methods unconditionally for now.
 2040      [Steve Henson]
 2041 
 2042   *) New build option no-ec2m to disable characteristic 2 code.
 2043      [Steve Henson]
 2044 
 2045   *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
 2046      all cases can be covered as some introduce binary incompatibilities.
 2047      [Steve Henson]
 2048 
 2049   *) Redirect RSA operations to FIPS module including keygen,
 2050      encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
 2051      [Steve Henson]
 2052 
 2053   *) Add similar low level API blocking to ciphers.
 2054      [Steve Henson]
 2055 
 2056   *) Low level digest APIs are not approved in FIPS mode: any attempt
 2057      to use these will cause a fatal error. Applications that *really* want
 2058      to use them can use the private_* version instead.
 2059      [Steve Henson]
 2060 
 2061   *) Redirect cipher operations to FIPS module for FIPS builds. 
 2062      [Steve Henson]
 2063 
 2064   *) Redirect digest operations to FIPS module for FIPS builds. 
 2065      [Steve Henson]
 2066 
 2067   *) Update build system to add "fips" flag which will link in fipscanister.o
 2068      for static and shared library builds embedding a signature if needed.
 2069      [Steve Henson]
 2070 
 2071   *) Output TLS supported curves in preference order instead of numerical
 2072      order. This is currently hardcoded for the highest order curves first.
 2073      This should be configurable so applications can judge speed vs strength.
 2074      [Steve Henson]
 2075 
 2076   *) Add TLS v1.2 server support for client authentication. 
 2077      [Steve Henson]
 2078 
 2079   *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
 2080      and enable MD5.
 2081      [Steve Henson]
 2082 
 2083   *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
 2084      FIPS modules versions.
 2085      [Steve Henson]
 2086 
 2087   *) Add TLS v1.2 client side support for client authentication. Keep cache
 2088      of handshake records longer as we don't know the hash algorithm to use
 2089      until after the certificate request message is received.
 2090      [Steve Henson]
 2091 
 2092   *) Initial TLS v1.2 client support. Add a default signature algorithms
 2093      extension including all the algorithms we support. Parse new signature
 2094      format in client key exchange. Relax some ECC signing restrictions for
 2095      TLS v1.2 as indicated in RFC5246.
 2096      [Steve Henson]
 2097 
 2098   *) Add server support for TLS v1.2 signature algorithms extension. Switch
 2099      to new signature format when needed using client digest preference.
 2100      All server ciphersuites should now work correctly in TLS v1.2. No client
 2101      support yet and no support for client certificates.
 2102      [Steve Henson]
 2103 
 2104   *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
 2105      to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
 2106      ciphersuites. At present only RSA key exchange ciphersuites work with
 2107      TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
 2108      SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
 2109      and version checking.
 2110      [Steve Henson]
 2111 
 2112   *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
 2113      with this defined it will not be affected by any changes to ssl internal
 2114      structures. Add several utility functions to allow openssl application
 2115      to work with OPENSSL_NO_SSL_INTERN defined.
 2116      [Steve Henson]
 2117 
 2118   *) A long standing patch to add support for SRP from EdelWeb (Peter
 2119      Sylvester and Christophe Renou) was integrated.
 2120      [Christophe Renou <christophe.renou@edelweb.fr>, Peter Sylvester
 2121      <peter.sylvester@edelweb.fr>, Tom Wu <tjw@cs.stanford.edu>, and
 2122      Ben Laurie]
 2123 
 2124   *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
 2125      [Steve Henson]
 2126 
 2127   *) Permit abbreviated handshakes when renegotiating using the function
 2128      SSL_renegotiate_abbreviated().
 2129      [Robin Seggelmann <seggelmann@fh-muenster.de>]
 2130 
 2131   *) Add call to ENGINE_register_all_complete() to
 2132      ENGINE_load_builtin_engines(), so some implementations get used
 2133      automatically instead of needing explicit application support.
 2134      [Steve Henson]
 2135 
 2136   *) Add support for TLS key exporter as described in RFC5705.
 2137      [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
 2138 
 2139   *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
 2140      a few changes are required:
 2141 
 2142        Add SSL_OP_NO_TLSv1_1 flag.
 2143        Add TLSv1_1 methods.
 2144        Update version checking logic to handle version 1.1.
 2145        Add explicit IV handling (ported from DTLS code).
 2146        Add command line options to s_client/s_server.
 2147      [Steve Henson]
 2148 
 2149  Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
 2150 
 2151   *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
 2152      in CMS and PKCS7 code. When RSA decryption fails use a random key for
 2153      content decryption and always return the same error. Note: this attack
 2154      needs on average 2^20 messages so it only affects automated senders. The
 2155      old behaviour can be reenabled in the CMS code by setting the
 2156      CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
 2157      an MMA defence is not necessary.
 2158      Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
 2159      this issue. (CVE-2012-0884)
 2160      [Steve Henson]
 2161 
 2162   *) Fix CVE-2011-4619: make sure we really are receiving a 
 2163      client hello before rejecting multiple SGC restarts. Thanks to
 2164      Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
 2165      [Steve Henson]
 2166 
 2167  Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
 2168 
 2169   *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
 2170      Thanks to Antonio Martin, Enterprise Secure Access Research and
 2171      Development, Cisco Systems, Inc. for discovering this bug and
 2172      preparing a fix. (CVE-2012-0050)
 2173      [Antonio Martin]
 2174 
 2175  Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
 2176 
 2177   *) Nadhem Alfardan and Kenny Paterson have discovered an extension
 2178      of the Vaudenay padding oracle attack on CBC mode encryption
 2179      which enables an efficient plaintext recovery attack against
 2180      the OpenSSL implementation of DTLS. Their attack exploits timing
 2181      differences arising during decryption processing. A research
 2182      paper describing this attack can be found at:
 2183                   http://www.isg.rhul.ac.uk/~kp/dtls.pdf
 2184      Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
 2185      Security Group at Royal Holloway, University of London
 2186      (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
 2187      <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
 2188      for preparing the fix. (CVE-2011-4108)
 2189      [Robin Seggelmann, Michael Tuexen]
 2190 
 2191   *) Clear bytes used for block padding of SSL 3.0 records.
 2192      (CVE-2011-4576)
 2193      [Adam Langley (Google)]
 2194 
 2195   *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
 2196      Kadianakis <desnacked@gmail.com> for discovering this issue and
 2197      Adam Langley for preparing the fix. (CVE-2011-4619)
 2198      [Adam Langley (Google)]
 2199 
 2200   *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
 2201      [Andrey Kulikov <amdeich@gmail.com>]
 2202 
 2203   *) Prevent malformed RFC3779 data triggering an assertion failure.
 2204      Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
 2205      and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
 2206      [Rob Austein <sra@hactrn.net>]
 2207 
 2208   *) Improved PRNG seeding for VOS.
 2209      [Paul Green <Paul.Green@stratus.com>]
 2210 
 2211   *) Fix ssl_ciph.c set-up race.
 2212      [Adam Langley (Google)]
 2213 
 2214   *) Fix spurious failures in ecdsatest.c.
 2215      [Emilia Käsper (Google)]
 2216 
 2217   *) Fix the BIO_f_buffer() implementation (which was mixing different
 2218      interpretations of the '..._len' fields).
 2219      [Adam Langley (Google)]
 2220 
 2221   *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
 2222      BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
 2223      threads won't reuse the same blinding coefficients.
 2224 
 2225      This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
 2226      lock to call BN_BLINDING_invert_ex, and avoids one use of
 2227      BN_BLINDING_update for each BN_BLINDING structure (previously,
 2228      the last update always remained unused).
 2229      [Emilia Käsper (Google)]
 2230 
 2231   *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
 2232      [Bob Buckholz (Google)]
 2233 
 2234  Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
 2235 
 2236   *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
 2237      by initialising X509_STORE_CTX properly. (CVE-2011-3207)
 2238      [Kaspar Brand <ossl@velox.ch>]
 2239 
 2240   *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
 2241      for multi-threaded use of ECDH. (CVE-2011-3210)
 2242      [Adam Langley (Google)]
 2243 
 2244   *) Fix x509_name_ex_d2i memory leak on bad inputs.
 2245      [Bodo Moeller]
 2246 
 2247   *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
 2248      signature public key algorithm by using OID xref utilities instead.
 2249      Before this you could only use some ECC ciphersuites with SHA1 only.
 2250      [Steve Henson]
 2251 
 2252   *) Add protection against ECDSA timing attacks as mentioned in the paper
 2253      by Billy Bob Brumley and Nicola Tuveri, see:
 2254 
 2255 	http://eprint.iacr.org/2011/232.pdf
 2256 
 2257      [Billy Bob Brumley and Nicola Tuveri]
 2258 
 2259  Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
 2260 
 2261   *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
 2262      [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
 2263 
 2264   *) Fix bug in string printing code: if *any* escaping is enabled we must
 2265      escape the escape character (backslash) or the resulting string is
 2266      ambiguous.
 2267      [Steve Henson]
 2268 
 2269  Changes between 1.0.0b and 1.0.0c  [2 Dec 2010]
 2270 
 2271   *) Disable code workaround for ancient and obsolete Netscape browsers
 2272      and servers: an attacker can use it in a ciphersuite downgrade attack.
 2273      Thanks to Martin Rex for discovering this bug. CVE-2010-4180
 2274      [Steve Henson]
 2275 
 2276   *) Fixed J-PAKE implementation error, originally discovered by
 2277      Sebastien Martini, further info and confirmation from Stefan
 2278      Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
 2279      [Ben Laurie]
 2280 
 2281  Changes between 1.0.0a and 1.0.0b  [16 Nov 2010]
 2282 
 2283   *) Fix extension code to avoid race conditions which can result in a buffer
 2284      overrun vulnerability: resumed sessions must not be modified as they can
 2285      be shared by multiple threads. CVE-2010-3864
 2286      [Steve Henson]
 2287 
 2288   *) Fix WIN32 build system to correctly link an ENGINE directory into
 2289      a DLL. 
 2290      [Steve Henson]
 2291 
 2292  Changes between 1.0.0 and 1.0.0a  [01 Jun 2010]
 2293 
 2294   *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover 
 2295      (CVE-2010-1633)
 2296      [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
 2297 
 2298  Changes between 0.9.8n and 1.0.0  [29 Mar 2010]
 2299 
 2300   *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
 2301      context. The operation can be customised via the ctrl mechanism in
 2302      case ENGINEs want to include additional functionality.
 2303      [Steve Henson]
 2304 
 2305   *) Tolerate yet another broken PKCS#8 key format: private key value negative.
 2306      [Steve Henson]
 2307 
 2308   *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
 2309      output hashes compatible with older versions of OpenSSL.
 2310      [Willy Weisz <weisz@vcpc.univie.ac.at>]
 2311 
 2312   *) Fix compression algorithm handling: if resuming a session use the
 2313      compression algorithm of the resumed session instead of determining
 2314      it from client hello again. Don't allow server to change algorithm.
 2315      [Steve Henson]
 2316 
 2317   *) Add load_crls() function to apps tidying load_certs() too. Add option
 2318      to verify utility to allow additional CRLs to be included.
 2319      [Steve Henson]
 2320 
 2321   *) Update OCSP request code to permit adding custom headers to the request:
 2322      some responders need this.
 2323      [Steve Henson]
 2324 
 2325   *) The function EVP_PKEY_sign() returns <=0 on error: check return code
 2326      correctly.
 2327      [Julia Lawall <julia@diku.dk>]
 2328 
 2329   *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
 2330      needlessly dereferenced structures, used obsolete functions and
 2331      didn't handle all updated verify codes correctly.
 2332      [Steve Henson]
 2333 
 2334   *) Disable MD2 in the default configuration.
 2335      [Steve Henson]
 2336 
 2337   *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
 2338      indicate the initial BIO being pushed or popped. This makes it possible
 2339      to determine whether the BIO is the one explicitly called or as a result
 2340      of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
 2341      it handles reference counts correctly and doesn't zero out the I/O bio
 2342      when it is not being explicitly popped. WARNING: applications which
 2343      included workarounds for the old buggy behaviour will need to be modified
 2344      or they could free up already freed BIOs.
 2345      [Steve Henson]
 2346 
 2347   *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
 2348      renaming to all platforms (within the 0.9.8 branch, this was
 2349      done conditionally on Netware platforms to avoid a name clash).
 2350      [Guenter <lists@gknw.net>]
 2351 
 2352   *) Add ECDHE and PSK support to DTLS.
 2353      [Michael Tuexen <tuexen@fh-muenster.de>]
 2354 
 2355   *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
 2356      be used on C++.
 2357      [Steve Henson]
 2358 
 2359   *) Add "missing" function EVP_MD_flags() (without this the only way to
 2360      retrieve a digest flags is by accessing the structure directly. Update
 2361      EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
 2362      or cipher is registered as in the "from" argument. Print out all
 2363      registered digests in the dgst usage message instead of manually 
 2364      attempting to work them out.
 2365      [Steve Henson]
 2366 
 2367   *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
 2368      this allows the use of compression and extensions. Change default cipher
 2369      string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
 2370      by default unless an application cipher string requests it.
 2371      [Steve Henson]
 2372 
 2373   *) Alter match criteria in PKCS12_parse(). It used to try to use local
 2374      key ids to find matching certificates and keys but some PKCS#12 files
 2375      don't follow the (somewhat unwritten) rules and this strategy fails.
 2376      Now just gather all certificates together and the first private key
 2377      then look for the first certificate that matches the key.
 2378      [Steve Henson]
 2379 
 2380   *) Support use of registered digest and cipher names for dgst and cipher
 2381      commands instead of having to add each one as a special case. So now
 2382      you can do:
 2383 
 2384         openssl sha256 foo
 2385 
 2386      as well as:
 2387 
 2388         openssl dgst -sha256 foo
 2389 
 2390      and this works for ENGINE based algorithms too.
 2391 
 2392      [Steve Henson]
 2393 
 2394   *) Update Gost ENGINE to support parameter files.
 2395      [Victor B. Wagner <vitus@cryptocom.ru>]
 2396 
 2397   *) Support GeneralizedTime in ca utility. 
 2398      [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
 2399 
 2400   *) Enhance the hash format used for certificate directory links. The new
 2401      form uses the canonical encoding (meaning equivalent names will work
 2402      even if they aren't identical) and uses SHA1 instead of MD5. This form
 2403      is incompatible with the older format and as a result c_rehash should
 2404      be used to rebuild symbolic links.
 2405      [Steve Henson]
 2406 
 2407   *) Make PKCS#8 the default write format for private keys, replacing the
 2408      traditional format. This form is standardised, more secure and doesn't
 2409      include an implicit MD5 dependency.
 2410      [Steve Henson]
 2411 
 2412   *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
 2413      committed to OpenSSL should pass this lot as a minimum.
 2414      [Steve Henson]
 2415 
 2416   *) Add session ticket override functionality for use by EAP-FAST.
 2417      [Jouni Malinen <j@w1.fi>]
 2418 
 2419   *) Modify HMAC functions to return a value. Since these can be implemented
 2420      in an ENGINE errors can occur.
 2421      [Steve Henson]
 2422 
 2423   *) Type-checked OBJ_bsearch_ex.
 2424      [Ben Laurie]
 2425 
 2426   *) Type-checked OBJ_bsearch. Also some constification necessitated
 2427      by type-checking.  Still to come: TXT_DB, bsearch(?),
 2428      OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
 2429      CONF_VALUE.
 2430      [Ben Laurie]
 2431 
 2432   *) New function OPENSSL_gmtime_adj() to add a specific number of days and
 2433      seconds to a tm structure directly, instead of going through OS
 2434      specific date routines. This avoids any issues with OS routines such
 2435      as the year 2038 bug. New *_adj() functions for ASN1 time structures
 2436      and X509_time_adj_ex() to cover the extended range. The existing
 2437      X509_time_adj() is still usable and will no longer have any date issues.
 2438      [Steve Henson]
 2439 
 2440   *) Delta CRL support. New use deltas option which will attempt to locate
 2441      and search any appropriate delta CRLs available.
 2442 
 2443      This work was sponsored by Google.
 2444      [Steve Henson]
 2445 
 2446   *) Support for CRLs partitioned by reason code. Reorganise CRL processing
 2447      code and add additional score elements. Validate alternate CRL paths
 2448      as part of the CRL checking and indicate a new error "CRL path validation
 2449      error" in this case. Applications wanting additional details can use
 2450      the verify callback and check the new "parent" field. If this is not
 2451      NULL CRL path validation is taking place. Existing applications wont
 2452      see this because it requires extended CRL support which is off by
 2453      default.
 2454 
 2455      This work was sponsored by Google.
 2456      [Steve Henson]
 2457 
 2458   *) Support for freshest CRL extension.
 2459 
 2460      This work was sponsored by Google.
 2461      [Steve Henson]
 2462 
 2463   *) Initial indirect CRL support. Currently only supported in the CRLs
 2464      passed directly and not via lookup. Process certificate issuer
 2465      CRL entry extension and lookup CRL entries by bother issuer name
 2466      and serial number. Check and process CRL issuer entry in IDP extension.
 2467 
 2468      This work was sponsored by Google.
 2469      [Steve Henson]
 2470 
 2471   *) Add support for distinct certificate and CRL paths. The CRL issuer
 2472      certificate is validated separately in this case. Only enabled if
 2473      an extended CRL support flag is set: this flag will enable additional
 2474      CRL functionality in future.
 2475 
 2476      This work was sponsored by Google.
 2477      [Steve Henson]
 2478 
 2479   *) Add support for policy mappings extension.
 2480 
 2481      This work was sponsored by Google.
 2482      [Steve Henson]
 2483 
 2484   *) Fixes to pathlength constraint, self issued certificate handling,
 2485      policy processing to align with RFC3280 and PKITS tests.
 2486 
 2487      This work was sponsored by Google.
 2488      [Steve Henson]
 2489 
 2490   *) Support for name constraints certificate extension. DN, email, DNS
 2491      and URI types are currently supported.
 2492 
 2493      This work was sponsored by Google.
 2494      [Steve Henson]
 2495 
 2496   *) To cater for systems that provide a pointer-based thread ID rather
 2497      than numeric, deprecate the current numeric thread ID mechanism and
 2498      replace it with a structure and associated callback type. This
 2499      mechanism allows a numeric "hash" to be extracted from a thread ID in
 2500      either case, and on platforms where pointers are larger than 'long',
 2501      mixing is done to help ensure the numeric 'hash' is usable even if it
 2502      can't be guaranteed unique. The default mechanism is to use "&errno"
 2503      as a pointer-based thread ID to distinguish between threads.
 2504 
 2505      Applications that want to provide their own thread IDs should now use
 2506      CRYPTO_THREADID_set_callback() to register a callback that will call
 2507      either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
 2508 
 2509      Note that ERR_remove_state() is now deprecated, because it is tied
 2510      to the assumption that thread IDs are numeric.  ERR_remove_state(0)
 2511      to free the current thread's error state should be replaced by
 2512      ERR_remove_thread_state(NULL).
 2513 
 2514      (This new approach replaces the functions CRYPTO_set_idptr_callback(),
 2515      CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
 2516      OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
 2517      application was previously providing a numeric thread callback that
 2518      was inappropriate for distinguishing threads, then uniqueness might
 2519      have been obtained with &errno that happened immediately in the
 2520      intermediate development versions of OpenSSL; this is no longer the
 2521      case, the numeric thread callback will now override the automatic use
 2522      of &errno.)
 2523      [Geoff Thorpe, with help from Bodo Moeller]
 2524 
 2525   *) Initial support for different CRL issuing certificates. This covers a
 2526      simple case where the self issued certificates in the chain exist and
 2527      the real CRL issuer is higher in the existing chain.
 2528 
 2529      This work was sponsored by Google.
 2530      [Steve Henson]
 2531 
 2532   *) Removed effectively defunct crypto/store from the build.
 2533      [Ben Laurie]
 2534 
 2535   *) Revamp of STACK to provide stronger type-checking. Still to come:
 2536      TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
 2537      ASN1_STRING, CONF_VALUE.
 2538      [Ben Laurie]
 2539 
 2540   *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
 2541      RAM on SSL connections.  This option can save about 34k per idle SSL.
 2542      [Nick Mathewson]
 2543 
 2544   *) Revamp of LHASH to provide stronger type-checking. Still to come:
 2545      STACK, TXT_DB, bsearch, qsort.
 2546      [Ben Laurie]
 2547 
 2548   *) Initial support for Cryptographic Message Syntax (aka CMS) based
 2549      on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
 2550      support for data, signedData, compressedData, digestedData and
 2551      encryptedData, envelopedData types included. Scripts to check against
 2552      RFC4134 examples draft and interop and consistency checks of many
 2553      content types and variants.
 2554      [Steve Henson]
 2555 
 2556   *) Add options to enc utility to support use of zlib compression BIO.
 2557      [Steve Henson]
 2558 
 2559   *) Extend mk1mf to support importing of options and assembly language
 2560      files from Configure script, currently only included in VC-WIN32.
 2561      The assembly language rules can now optionally generate the source
 2562      files from the associated perl scripts.
 2563      [Steve Henson]
 2564 
 2565   *) Implement remaining functionality needed to support GOST ciphersuites.
 2566      Interop testing has been performed using CryptoPro implementations.
 2567      [Victor B. Wagner <vitus@cryptocom.ru>]
 2568 
 2569   *) s390x assembler pack.
 2570      [Andy Polyakov]
 2571 
 2572   *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
 2573      "family."
 2574      [Andy Polyakov]
 2575 
 2576   *) Implement Opaque PRF Input TLS extension as specified in
 2577      draft-rescorla-tls-opaque-prf-input-00.txt.  Since this is not an
 2578      official specification yet and no extension type assignment by
 2579      IANA exists, this extension (for now) will have to be explicitly
 2580      enabled when building OpenSSL by providing the extension number
 2581      to use.  For example, specify an option
 2582 
 2583          -DTLSEXT_TYPE_opaque_prf_input=0x9527
 2584 
 2585      to the "config" or "Configure" script to enable the extension,
 2586      assuming extension number 0x9527 (which is a completely arbitrary
 2587      and unofficial assignment based on the MD5 hash of the Internet
 2588      Draft).  Note that by doing so, you potentially lose
 2589      interoperability with other TLS implementations since these might
 2590      be using the same extension number for other purposes.
 2591 
 2592      SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
 2593      opaque PRF input value to use in the handshake.  This will create
 2594      an interal copy of the length-'len' string at 'src', and will
 2595      return non-zero for success.
 2596 
 2597      To get more control and flexibility, provide a callback function
 2598      by using
 2599 
 2600           SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
 2601           SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
 2602 
 2603      where
 2604 
 2605           int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
 2606           void *arg;
 2607 
 2608      Callback function 'cb' will be called in handshakes, and is
 2609      expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
 2610      Argument 'arg' is for application purposes (the value as given to
 2611      SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
 2612      be provided to the callback function).  The callback function
 2613      has to return non-zero to report success: usually 1 to use opaque
 2614      PRF input just if possible, or 2 to enforce use of the opaque PRF
 2615      input.  In the latter case, the library will abort the handshake
 2616      if opaque PRF input is not successfully negotiated.
 2617 
 2618      Arguments 'peerinput' and 'len' given to the callback function
 2619      will always be NULL and 0 in the case of a client.  A server will
 2620      see the client's opaque PRF input through these variables if
 2621      available (NULL and 0 otherwise).  Note that if the server
 2622      provides an opaque PRF input, the length must be the same as the
 2623      length of the client's opaque PRF input.
 2624 
 2625      Note that the callback function will only be called when creating
 2626      a new session (session resumption can resume whatever was
 2627      previously negotiated), and will not be called in SSL 2.0
 2628      handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
 2629      SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
 2630      for applications that need to enforce opaque PRF input.
 2631 
 2632      [Bodo Moeller]
 2633 
 2634   *) Update ssl code to support digests other than SHA1+MD5 for handshake
 2635      MAC. 
 2636 
 2637      [Victor B. Wagner <vitus@cryptocom.ru>]
 2638 
 2639   *) Add RFC4507 support to OpenSSL. This includes the corrections in
 2640      RFC4507bis. The encrypted ticket format is an encrypted encoded
 2641      SSL_SESSION structure, that way new session features are automatically
 2642      supported.
 2643 
 2644      If a client application caches session in an SSL_SESSION structure
 2645      support is transparent because tickets are now stored in the encoded
 2646      SSL_SESSION.
 2647      
 2648      The SSL_CTX structure automatically generates keys for ticket
 2649      protection in servers so again support should be possible
 2650      with no application modification.
 2651 
 2652      If a client or server wishes to disable RFC4507 support then the option
 2653      SSL_OP_NO_TICKET can be set.
 2654 
 2655      Add a TLS extension debugging callback to allow the contents of any client
 2656      or server extensions to be examined.
 2657 
 2658      This work was sponsored by Google.
 2659      [Steve Henson]
 2660 
 2661   *) Final changes to avoid use of pointer pointer casts in OpenSSL.
 2662      OpenSSL should now compile cleanly on gcc 4.2
 2663      [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
 2664 
 2665   *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
 2666      support including streaming MAC support: this is required for GOST
 2667      ciphersuite support.
 2668      [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
 2669 
 2670   *) Add option -stream to use PKCS#7 streaming in smime utility. New
 2671      function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
 2672      to output in BER and PEM format.
 2673      [Steve Henson]
 2674 
 2675   *) Experimental support for use of HMAC via EVP_PKEY interface. This
 2676      allows HMAC to be handled via the EVP_DigestSign*() interface. The
 2677      EVP_PKEY "key" in this case is the HMAC key, potentially allowing
 2678      ENGINE support for HMAC keys which are unextractable. New -mac and
 2679      -macopt options to dgst utility.
 2680      [Steve Henson]
 2681 
 2682   *) New option -sigopt to dgst utility. Update dgst to use
 2683      EVP_Digest{Sign,Verify}*. These two changes make it possible to use
 2684      alternative signing paramaters such as X9.31 or PSS in the dgst 
 2685      utility.
 2686      [Steve Henson]
 2687 
 2688   *) Change ssl_cipher_apply_rule(), the internal function that does
 2689      the work each time a ciphersuite string requests enabling
 2690      ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
 2691      removing ("!foo+bar") a class of ciphersuites: Now it maintains
 2692      the order of disabled ciphersuites such that those ciphersuites
 2693      that most recently went from enabled to disabled not only stay
 2694      in order with respect to each other, but also have higher priority
 2695      than other disabled ciphersuites the next time ciphersuites are
 2696      enabled again.
 2697 
 2698      This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
 2699      the same ciphersuites as with "HIGH" alone, but in a specific
 2700      order where the PSK ciphersuites come first (since they are the
 2701      most recently disabled ciphersuites when "HIGH" is parsed).
 2702 
 2703      Also, change ssl_create_cipher_list() (using this new
 2704      funcionality) such that between otherwise identical
 2705      cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
 2706      the default order.
 2707      [Bodo Moeller]
 2708 
 2709   *) Change ssl_create_cipher_list() so that it automatically
 2710      arranges the ciphersuites in reasonable order before starting
 2711      to process the rule string.  Thus, the definition for "DEFAULT"
 2712      (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
 2713      remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
 2714      This makes it much easier to arrive at a reasonable default order
 2715      in applications for which anonymous ciphers are OK (meaning
 2716      that you can't actually use DEFAULT).
 2717      [Bodo Moeller; suggested by Victor Duchovni]
 2718 
 2719   *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
 2720      processing) into multiple integers instead of setting
 2721      "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
 2722      "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
 2723      (These masks as well as the individual bit definitions are hidden
 2724      away into the non-exported interface ssl/ssl_locl.h, so this
 2725      change to the definition of the SSL_CIPHER structure shouldn't
 2726      affect applications.)  This give us more bits for each of these
 2727      categories, so there is no longer a need to coagulate AES128 and
 2728      AES256 into a single algorithm bit, and to coagulate Camellia128
 2729      and Camellia256 into a single algorithm bit, which has led to all
 2730      kinds of kludges.
 2731 
 2732      Thus, among other things, the kludge introduced in 0.9.7m and
 2733      0.9.8e for masking out AES256 independently of AES128 or masking
 2734      out Camellia256 independently of AES256 is not needed here in 0.9.9.
 2735 
 2736      With the change, we also introduce new ciphersuite aliases that
 2737      so far were missing: "AES128", "AES256", "CAMELLIA128", and
 2738      "CAMELLIA256".
 2739      [Bodo Moeller]
 2740 
 2741   *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
 2742      Use the leftmost N bytes of the signature input if the input is
 2743      larger than the prime q (with N being the size in bytes of q).
 2744      [Nils Larsch]
 2745 
 2746   *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
 2747      it yet and it is largely untested.
 2748      [Steve Henson]
 2749 
 2750   *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
 2751      [Nils Larsch]
 2752 
 2753   *) Initial incomplete changes to avoid need for function casts in OpenSSL
 2754      some compilers (gcc 4.2 and later) reject their use. Safestack is
 2755      reimplemented.  Update ASN1 to avoid use of legacy functions. 
 2756      [Steve Henson]
 2757 
 2758   *) Win32/64 targets are linked with Winsock2.
 2759      [Andy Polyakov]
 2760 
 2761   *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
 2762      to external functions. This can be used to increase CRL handling 
 2763      efficiency especially when CRLs are very large by (for example) storing
 2764      the CRL revoked certificates in a database.
 2765      [Steve Henson]
 2766 
 2767   *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
 2768      new CRLs added to a directory can be used. New command line option
 2769      -verify_return_error to s_client and s_server. This causes real errors
 2770      to be returned by the verify callback instead of carrying on no matter
 2771      what. This reflects the way a "real world" verify callback would behave.
 2772      [Steve Henson]
 2773 
 2774   *) GOST engine, supporting several GOST algorithms and public key formats.
 2775      Kindly donated by Cryptocom.
 2776      [Cryptocom]
 2777 
 2778   *) Partial support for Issuing Distribution Point CRL extension. CRLs
 2779      partitioned by DP are handled but no indirect CRL or reason partitioning
 2780      (yet). Complete overhaul of CRL handling: now the most suitable CRL is
 2781      selected via a scoring technique which handles IDP and AKID in CRLs.
 2782      [Steve Henson]
 2783 
 2784   *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
 2785      will ultimately be used for all verify operations: this will remove the
 2786      X509_STORE dependency on certificate verification and allow alternative
 2787      lookup methods.  X509_STORE based implementations of these two callbacks.
 2788      [Steve Henson]
 2789 
 2790   *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
 2791      Modify get_crl() to find a valid (unexpired) CRL if possible.
 2792      [Steve Henson]
 2793 
 2794   *) New function X509_CRL_match() to check if two CRLs are identical. Normally
 2795      this would be called X509_CRL_cmp() but that name is already used by
 2796      a function that just compares CRL issuer names. Cache several CRL 
 2797      extensions in X509_CRL structure and cache CRLDP in X509.
 2798      [Steve Henson]
 2799 
 2800   *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
 2801      this maps equivalent X509_NAME structures into a consistent structure.
 2802      Name comparison can then be performed rapidly using memcmp().
 2803      [Steve Henson]
 2804 
 2805   *) Non-blocking OCSP request processing. Add -timeout option to ocsp 
 2806      utility.
 2807      [Steve Henson]
 2808 
 2809   *) Allow digests to supply their own micalg string for S/MIME type using
 2810      the ctrl EVP_MD_CTRL_MICALG.
 2811      [Steve Henson]
 2812 
 2813   *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
 2814      EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
 2815      ctrl. It can then customise the structure before and/or after signing
 2816      if necessary.
 2817      [Steve Henson]
 2818 
 2819   *) New function OBJ_add_sigid() to allow application defined signature OIDs
 2820      to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
 2821      to free up any added signature OIDs.
 2822      [Steve Henson]
 2823 
 2824   *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
 2825      EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
 2826      digest and cipher tables. New options added to openssl utility:
 2827      list-message-digest-algorithms and list-cipher-algorithms.
 2828      [Steve Henson]
 2829 
 2830   *) Change the array representation of binary polynomials: the list
 2831      of degrees of non-zero coefficients is now terminated with -1.
 2832      Previously it was terminated with 0, which was also part of the
 2833      value; thus, the array representation was not applicable to
 2834      polynomials where t^0 has coefficient zero.  This change makes
 2835      the array representation useful in a more general context.
 2836      [Douglas Stebila]
 2837 
 2838   *) Various modifications and fixes to SSL/TLS cipher string
 2839      handling.  For ECC, the code now distinguishes between fixed ECDH
 2840      with RSA certificates on the one hand and with ECDSA certificates
 2841      on the other hand, since these are separate ciphersuites.  The
 2842      unused code for Fortezza ciphersuites has been removed.
 2843 
 2844      For consistency with EDH, ephemeral ECDH is now called "EECDH"
 2845      (not "ECDHE").  For consistency with the code for DH
 2846      certificates, use of ECDH certificates is now considered ECDH
 2847      authentication, not RSA or ECDSA authentication (the latter is
 2848      merely the CA's signing algorithm and not actively used in the
 2849      protocol).
 2850 
 2851      The temporary ciphersuite alias "ECCdraft" is no longer
 2852      available, and ECC ciphersuites are no longer excluded from "ALL"
 2853      and "DEFAULT".  The following aliases now exist for RFC 4492
 2854      ciphersuites, most of these by analogy with the DH case:
 2855 
 2856          kECDHr   - ECDH cert, signed with RSA
 2857          kECDHe   - ECDH cert, signed with ECDSA
 2858          kECDH    - ECDH cert (signed with either RSA or ECDSA)
 2859          kEECDH   - ephemeral ECDH
 2860          ECDH     - ECDH cert or ephemeral ECDH
 2861 
 2862          aECDH    - ECDH cert
 2863          aECDSA   - ECDSA cert
 2864          ECDSA    - ECDSA cert
 2865 
 2866          AECDH    - anonymous ECDH
 2867          EECDH    - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
 2868 
 2869      [Bodo Moeller]
 2870 
 2871   *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
 2872      Use correct micalg parameters depending on digest(s) in signed message.
 2873      [Steve Henson]
 2874 
 2875   *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
 2876      an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
 2877      [Steve Henson]
 2878 
 2879   *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
 2880      an engine to register a method. Add ENGINE lookups for methods and
 2881      functional reference processing.
 2882      [Steve Henson]
 2883 
 2884   *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
 2885      EVP_{Sign,Verify}* which allow an application to customise the signature
 2886      process.
 2887      [Steve Henson]
 2888 
 2889   *) New -resign option to smime utility. This adds one or more signers
 2890      to an existing PKCS#7 signedData structure. Also -md option to use an
 2891      alternative message digest algorithm for signing.
 2892      [Steve Henson]
 2893 
 2894   *) Tidy up PKCS#7 routines and add new functions to make it easier to
 2895      create PKCS7 structures containing multiple signers. Update smime
 2896      application to support multiple signers.
 2897      [Steve Henson]
 2898 
 2899   *) New -macalg option to pkcs12 utility to allow setting of an alternative
 2900      digest MAC.
 2901      [Steve Henson]
 2902 
 2903   *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
 2904      Reorganize PBE internals to lookup from a static table using NIDs,
 2905      add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
 2906      EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
 2907      PRF which will be automatically used with PBES2.
 2908      [Steve Henson]
 2909 
 2910   *) Replace the algorithm specific calls to generate keys in "req" with the
 2911      new API.
 2912      [Steve Henson]
 2913 
 2914   *) Update PKCS#7 enveloped data routines to use new API. This is now
 2915      supported by any public key method supporting the encrypt operation. A
 2916      ctrl is added to allow the public key algorithm to examine or modify
 2917      the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
 2918      a no op.
 2919      [Steve Henson]
 2920 
 2921   *) Add a ctrl to asn1 method to allow a public key algorithm to express
 2922      a default digest type to use. In most cases this will be SHA1 but some
 2923      algorithms (such as GOST) need to specify an alternative digest. The
 2924      return value indicates how strong the prefernce is 1 means optional and
 2925      2 is mandatory (that is it is the only supported type). Modify
 2926      ASN1_item_sign() to accept a NULL digest argument to indicate it should
 2927      use the default md. Update openssl utilities to use the default digest
 2928      type for signing if it is not explicitly indicated.
 2929      [Steve Henson]
 2930 
 2931   *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New 
 2932      EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
 2933      signing method from the key type. This effectively removes the link
 2934      between digests and public key types.
 2935      [Steve Henson]
 2936 
 2937   *) Add an OID cross reference table and utility functions. Its purpose is to
 2938      translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
 2939      rsaEncryption. This will allow some of the algorithm specific hackery
 2940      needed to use the correct OID to be removed. 
 2941      [Steve Henson]
 2942 
 2943   *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
 2944      structures for PKCS7_sign(). They are now set up by the relevant public
 2945      key ASN1 method.
 2946      [Steve Henson]
 2947 
 2948   *) Add provisional EC pkey method with support for ECDSA and ECDH.
 2949      [Steve Henson]
 2950 
 2951   *) Add support for key derivation (agreement) in the API, DH method and
 2952      pkeyutl.
 2953      [Steve Henson]
 2954 
 2955   *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
 2956      public and private key formats. As a side effect these add additional 
 2957      command line functionality not previously available: DSA signatures can be
 2958      generated and verified using pkeyutl and DH key support and generation in
 2959      pkey, genpkey.
 2960      [Steve Henson]
 2961 
 2962   *) BeOS support.
 2963      [Oliver Tappe <zooey@hirschkaefer.de>]
 2964 
 2965   *) New make target "install_html_docs" installs HTML renditions of the
 2966      manual pages.
 2967      [Oliver Tappe <zooey@hirschkaefer.de>]
 2968 
 2969   *) New utility "genpkey" this is analagous to "genrsa" etc except it can
 2970      generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
 2971      support key and parameter generation and add initial key generation
 2972      functionality for RSA.
 2973      [Steve Henson]
 2974 
 2975   *) Add functions for main EVP_PKEY_method operations. The undocumented
 2976      functions EVP_PKEY_{encrypt,decrypt} have been renamed to
 2977      EVP_PKEY_{encrypt,decrypt}_old. 
 2978      [Steve Henson]
 2979 
 2980   *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
 2981      key API, doesn't do much yet.
 2982      [Steve Henson]
 2983 
 2984   *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
 2985      public key algorithms. New option to openssl utility:
 2986      "list-public-key-algorithms" to print out info.
 2987      [Steve Henson]
 2988 
 2989   *) Implement the Supported Elliptic Curves Extension for
 2990      ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
 2991      [Douglas Stebila]
 2992 
 2993   *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
 2994      EVP_CIPHER structures to avoid later problems in EVP_cleanup().
 2995      [Steve Henson]
 2996 
 2997   *) New utilities pkey and pkeyparam. These are similar to algorithm specific
 2998      utilities such as rsa, dsa, dsaparam etc except they process any key
 2999      type.
 3000      [Steve Henson]
 3001 
 3002   *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New 
 3003      functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
 3004      EVP_PKEY_print_param() to print public key data from an EVP_PKEY
 3005      structure.
 3006      [Steve Henson]
 3007 
 3008   *) Initial support for pluggable public key ASN1.
 3009      De-spaghettify the public key ASN1 handling. Move public and private
 3010      key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
 3011      algorithm specific handling to a single module within the relevant
 3012      algorithm directory. Add functions to allow (near) opaque processing
 3013      of public and private key structures.
 3014      [Steve Henson]
 3015 
 3016   *) Implement the Supported Point Formats Extension for
 3017      ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
 3018      [Douglas Stebila]
 3019 
 3020   *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
 3021      for the psk identity [hint] and the psk callback functions to the
 3022      SSL_SESSION, SSL and SSL_CTX structure.
 3023      
 3024      New ciphersuites:
 3025          PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
 3026          PSK-AES256-CBC-SHA
 3027  
 3028      New functions:
 3029          SSL_CTX_use_psk_identity_hint
 3030          SSL_get_psk_identity_hint
 3031          SSL_get_psk_identity
 3032          SSL_use_psk_identity_hint
 3033 
 3034      [Mika Kousa and Pasi Eronen of Nokia Corporation]
 3035 
 3036   *) Add RFC 3161 compliant time stamp request creation, response generation
 3037      and response verification functionality.
 3038      [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
 3039 
 3040   *) Add initial support for TLS extensions, specifically for the server_name
 3041      extension so far.  The SSL_SESSION, SSL_CTX, and SSL data structures now
 3042      have new members for a host name.  The SSL data structure has an
 3043      additional member SSL_CTX *initial_ctx so that new sessions can be
 3044      stored in that context to allow for session resumption, even after the
 3045      SSL has been switched to a new SSL_CTX in reaction to a client's
 3046      server_name extension.
 3047 
 3048      New functions (subject to change):
 3049 
 3050          SSL_get_servername()
 3051          SSL_get_servername_type()
 3052          SSL_set_SSL_CTX()
 3053 
 3054      New CTRL codes and macros (subject to change):
 3055 
 3056          SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
 3057                                  - SSL_CTX_set_tlsext_servername_callback()
 3058          SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
 3059                                       - SSL_CTX_set_tlsext_servername_arg()
 3060          SSL_CTRL_SET_TLSEXT_HOSTNAME           - SSL_set_tlsext_host_name()
 3061 
 3062      openssl s_client has a new '-servername ...' option.
 3063 
 3064      openssl s_server has new options '-servername_host ...', '-cert2 ...',
 3065      '-key2 ...', '-servername_fatal' (subject to change).  This allows
 3066      testing the HostName extension for a specific single host name ('-cert'
 3067      and '-key' remain fallbacks for handshakes without HostName
 3068      negotiation).  If the unrecogninzed_name alert has to be sent, this by
 3069      default is a warning; it becomes fatal with the '-servername_fatal'
 3070      option.
 3071 
 3072      [Peter Sylvester,  Remy Allais, Christophe Renou]
 3073 
 3074   *) Whirlpool hash implementation is added.
 3075      [Andy Polyakov]
 3076 
 3077   *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
 3078      bn(64,32). Because of instruction set limitations it doesn't have
 3079      any negative impact on performance. This was done mostly in order
 3080      to make it possible to share assembler modules, such as bn_mul_mont
 3081      implementations, between 32- and 64-bit builds without hassle.
 3082      [Andy Polyakov]
 3083 
 3084   *) Move code previously exiled into file crypto/ec/ec2_smpt.c
 3085      to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
 3086      macro.
 3087      [Bodo Moeller]
 3088 
 3089   *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
 3090      dedicated Montgomery multiplication procedure, is introduced.
 3091      BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
 3092      "64-bit" performance on certain 32-bit targets.
 3093      [Andy Polyakov]
 3094 
 3095   *) New option SSL_OP_NO_COMP to disable use of compression selectively
 3096      in SSL structures. New SSL ctrl to set maximum send fragment size. 
 3097      Save memory by seeting the I/O buffer sizes dynamically instead of
 3098      using the maximum available value.
 3099      [Steve Henson]
 3100 
 3101   *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
 3102      in addition to the text details.
 3103      [Bodo Moeller]
 3104 
 3105   *) Very, very preliminary EXPERIMENTAL support for printing of general
 3106      ASN1 structures. This currently produces rather ugly output and doesn't
 3107      handle several customised structures at all.
 3108      [Steve Henson]
 3109 
 3110   *) Integrated support for PVK file format and some related formats such
 3111      as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
 3112      these in the 'rsa' and 'dsa' utilities.
 3113      [Steve Henson]
 3114 
 3115   *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
 3116      [Steve Henson]
 3117 
 3118   *) Remove the ancient ASN1_METHOD code. This was only ever used in one
 3119      place for the (very old) "NETSCAPE" format certificates which are now
 3120      handled using new ASN1 code equivalents.
 3121      [Steve Henson]
 3122 
 3123   *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
 3124      pointer and make the SSL_METHOD parameter in SSL_CTX_new,
 3125      SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
 3126      [Nils Larsch]
 3127 
 3128   *) Modify CRL distribution points extension code to print out previously
 3129      unsupported fields. Enhance extension setting code to allow setting of
 3130      all fields.
 3131      [Steve Henson]
 3132 
 3133   *) Add print and set support for Issuing Distribution Point CRL extension.
 3134      [Steve Henson]
 3135 
 3136   *) Change 'Configure' script to enable Camellia by default.
 3137      [NTT]
 3138 
 3139  Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
 3140 
 3141   *) When rejecting SSL/TLS records due to an incorrect version number, never
 3142      update s->server with a new major version number.  As of
 3143      - OpenSSL 0.9.8m if 'short' is a 16-bit type,
 3144      - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
 3145      the previous behavior could result in a read attempt at NULL when
 3146      receiving specific incorrect SSL/TLS records once record payload
 3147      protection is active.  (CVE-2010-0740)
 3148      [Bodo Moeller, Adam Langley <agl@chromium.org>]
 3149 
 3150   *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL 
 3151      could be crashed if the relevant tables were not present (e.g. chrooted).
 3152      [Tomas Hoger <thoger@redhat.com>]
 3153 
 3154  Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
 3155 
 3156   *) Always check bn_wexpend() return values for failure.  (CVE-2009-3245)
 3157      [Martin Olsson, Neel Mehta]
 3158 
 3159   *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
 3160      accommodate for stack sorting, always a write lock!).
 3161      [Bodo Moeller]
 3162 
 3163   *) On some versions of WIN32 Heap32Next is very slow. This can cause
 3164      excessive delays in the RAND_poll(): over a minute. As a workaround
 3165      include a time check in the inner Heap32Next loop too.
 3166      [Steve Henson]
 3167 
 3168   *) The code that handled flushing of data in SSL/TLS originally used the
 3169      BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
 3170      the problem outlined in PR#1949. The fix suggested there however can
 3171      trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
 3172      of Apache). So instead simplify the code to flush unconditionally.
 3173      This should be fine since flushing with no data to flush is a no op.
 3174      [Steve Henson]
 3175 
 3176   *) Handle TLS versions 2.0 and later properly and correctly use the
 3177      highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
 3178      off ancient servers have a habit of sticking around for a while...
 3179      [Steve Henson]
 3180 
 3181   *) Modify compression code so it frees up structures without using the
 3182      ex_data callbacks. This works around a problem where some applications
 3183      call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
 3184      restarting) then use compression (e.g. SSL with compression) later.
 3185      This results in significant per-connection memory leaks and
 3186      has caused some security issues including CVE-2008-1678 and
 3187      CVE-2009-4355.
 3188      [Steve Henson]
 3189 
 3190   *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
 3191      change when encrypting or decrypting.
 3192      [Bodo Moeller]
 3193 
 3194   *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
 3195      connect and renegotiate with servers which do not support RI.
 3196      Until RI is more widely deployed this option is enabled by default.
 3197      [Steve Henson]
 3198 
 3199   *) Add "missing" ssl ctrls to clear options and mode.
 3200      [Steve Henson]
 3201 
 3202   *) If client attempts to renegotiate and doesn't support RI respond with
 3203      a no_renegotiation alert as required by RFC5746.  Some renegotiating
 3204      TLS clients will continue a connection gracefully when they receive
 3205      the alert. Unfortunately OpenSSL mishandled this alert and would hang
 3206      waiting for a server hello which it will never receive. Now we treat a
 3207      received no_renegotiation alert as a fatal error. This is because
 3208      applications requesting a renegotiation might well expect it to succeed
 3209      and would have no code in place to handle the server denying it so the
 3210      only safe thing to do is to terminate the connection.
 3211      [Steve Henson]
 3212 
 3213   *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
 3214      peer supports secure renegotiation and 0 otherwise. Print out peer
 3215      renegotiation support in s_client/s_server.
 3216      [Steve Henson]
 3217 
 3218   *) Replace the highly broken and deprecated SPKAC certification method with
 3219      the updated NID creation version. This should correctly handle UTF8.
 3220      [Steve Henson]
 3221 
 3222   *) Implement RFC5746. Re-enable renegotiation but require the extension
 3223      as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
 3224      turns out to be a bad idea. It has been replaced by
 3225      SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
 3226      SSL_CTX_set_options(). This is really not recommended unless you
 3227      know what you are doing.
 3228      [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
 3229 
 3230   *) Fixes to stateless session resumption handling. Use initial_ctx when
 3231      issuing and attempting to decrypt tickets in case it has changed during
 3232      servername handling. Use a non-zero length session ID when attempting
 3233      stateless session resumption: this makes it possible to determine if
 3234      a resumption has occurred immediately after receiving server hello
 3235      (several places in OpenSSL subtly assume this) instead of later in
 3236      the handshake.
 3237      [Steve Henson]
 3238 
 3239   *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
 3240      CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
 3241      fixes for a few places where the return code is not checked
 3242      correctly.
 3243      [Julia Lawall <julia@diku.dk>]
 3244 
 3245   *) Add --strict-warnings option to Configure script to include devteam
 3246      warnings in other configurations.
 3247      [Steve Henson]
 3248 
 3249   *) Add support for --libdir option and LIBDIR variable in makefiles. This
 3250      makes it possible to install openssl libraries in locations which
 3251      have names other than "lib", for example "/usr/lib64" which some
 3252      systems need.
 3253      [Steve Henson, based on patch from Jeremy Utley]
 3254 
 3255   *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
 3256      X690 8.9.12 and can produce some misleading textual output of OIDs.
 3257      [Steve Henson, reported by Dan Kaminsky]
 3258 
 3259   *) Delete MD2 from algorithm tables. This follows the recommendation in
 3260      several standards that it is not used in new applications due to
 3261      several cryptographic weaknesses. For binary compatibility reasons
 3262      the MD2 API is still compiled in by default.
 3263      [Steve Henson]
 3264 
 3265   *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
 3266      and restored.
 3267      [Steve Henson]
 3268 
 3269   *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
 3270      OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
 3271      clash.
 3272      [Guenter <lists@gknw.net>]
 3273 
 3274   *) Fix the server certificate chain building code to use X509_verify_cert(),
 3275      it used to have an ad-hoc builder which was unable to cope with anything
 3276      other than a simple chain.
 3277      [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
 3278 
 3279   *) Don't check self signed certificate signatures in X509_verify_cert()
 3280      by default (a flag can override this): it just wastes time without
 3281      adding any security. As a useful side effect self signed root CAs
 3282      with non-FIPS digests are now usable in FIPS mode.
 3283      [Steve Henson]
 3284 
 3285   *) In dtls1_process_out_of_seq_message() the check if the current message
 3286      is already buffered was missing. For every new message was memory
 3287      allocated, allowing an attacker to perform an denial of service attack
 3288      with sending out of seq handshake messages until there is no memory
 3289      left. Additionally every future messege was buffered, even if the
 3290      sequence number made no sense and would be part of another handshake.
 3291      So only messages with sequence numbers less than 10 in advance will be
 3292      buffered.  (CVE-2009-1378)
 3293      [Robin Seggelmann, discovered by Daniel Mentz] 	
 3294 
 3295   *) Records are buffered if they arrive with a future epoch to be
 3296      processed after finishing the corresponding handshake. There is
 3297      currently no limitation to this buffer allowing an attacker to perform
 3298      a DOS attack with sending records with future epochs until there is no
 3299      memory left. This patch adds the pqueue_size() function to detemine
 3300      the size of a buffer and limits the record buffer to 100 entries.
 3301      (CVE-2009-1377)
 3302      [Robin Seggelmann, discovered by Daniel Mentz] 	
 3303 
 3304   *) Keep a copy of frag->msg_header.frag_len so it can be used after the
 3305      parent structure is freed.  (CVE-2009-1379)
 3306      [Daniel Mentz] 	
 3307 
 3308   *) Handle non-blocking I/O properly in SSL_shutdown() call.
 3309      [Darryl Miles <darryl-mailinglists@netbauds.net>]
 3310 
 3311   *) Add 2.5.4.* OIDs
 3312      [Ilya O. <vrghost@gmail.com>]
 3313 
 3314  Changes between 0.9.8k and 0.9.8l  [5 Nov 2009]
 3315 
 3316   *) Disable renegotiation completely - this fixes a severe security
 3317      problem (CVE-2009-3555) at the cost of breaking all
 3318      renegotiation. Renegotiation can be re-enabled by setting
 3319      SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
 3320      run-time. This is really not recommended unless you know what
 3321      you're doing.
 3322      [Ben Laurie]
 3323 
 3324  Changes between 0.9.8j and 0.9.8k  [25 Mar 2009]
 3325 
 3326   *) Don't set val to NULL when freeing up structures, it is freed up by
 3327      underlying code. If sizeof(void *) > sizeof(long) this can result in
 3328      zeroing past the valid field. (CVE-2009-0789)
 3329      [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
 3330 
 3331   *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
 3332      checked correctly. This would allow some invalid signed attributes to
 3333      appear to verify correctly. (CVE-2009-0591)
 3334      [Ivan Nestlerode <inestlerode@us.ibm.com>]
 3335 
 3336   *) Reject UniversalString and BMPString types with invalid lengths. This
 3337      prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
 3338      a legal length. (CVE-2009-0590)
 3339      [Steve Henson]
 3340 
 3341   *) Set S/MIME signing as the default purpose rather than setting it 
 3342      unconditionally. This allows applications to override it at the store
 3343      level.
 3344      [Steve Henson]
 3345 
 3346   *) Permit restricted recursion of ASN1 strings. This is needed in practice
 3347      to handle some structures.
 3348      [Steve Henson]
 3349 
 3350   *) Improve efficiency of mem_gets: don't search whole buffer each time
 3351      for a '\n'
 3352      [Jeremy Shapiro <jnshapir@us.ibm.com>]
 3353 
 3354   *) New -hex option for openssl rand.
 3355      [Matthieu Herrb]
 3356 
 3357   *) Print out UTF8String and NumericString when parsing ASN1.
 3358      [Steve Henson]
 3359 
 3360   *) Support NumericString type for name components.
 3361      [Steve Henson]
 3362 
 3363   *) Allow CC in the environment to override the automatically chosen
 3364      compiler. Note that nothing is done to ensure flags work with the
 3365      chosen compiler.
 3366      [Ben Laurie]
 3367 
 3368  Changes between 0.9.8i and 0.9.8j  [07 Jan 2009]
 3369 
 3370   *) Properly check EVP_VerifyFinal() and similar return values
 3371      (CVE-2008-5077).
 3372      [Ben Laurie, Bodo Moeller, Google Security Team]
 3373 
 3374   *) Enable TLS extensions by default.
 3375      [Ben Laurie]
 3376 
 3377   *) Allow the CHIL engine to be loaded, whether the application is
 3378      multithreaded or not. (This does not release the developer from the
 3379      obligation to set up the dynamic locking callbacks.)
 3380      [Sander Temme <sander@temme.net>]
 3381 
 3382   *) Use correct exit code if there is an error in dgst command.
 3383      [Steve Henson; problem pointed out by Roland Dirlewanger]
 3384 
 3385   *) Tweak Configure so that you need to say "experimental-jpake" to enable
 3386      JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
 3387      [Bodo Moeller]
 3388 
 3389   *) Add experimental JPAKE support, including demo authentication in
 3390      s_client and s_server.
 3391      [Ben Laurie]
 3392 
 3393   *) Set the comparison function in v3_addr_canonize().
 3394      [Rob Austein <sra@hactrn.net>]
 3395 
 3396   *) Add support for XMPP STARTTLS in s_client.
 3397      [Philip Paeps <philip@freebsd.org>]
 3398 
 3399   *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
 3400      to ensure that even with this option, only ciphersuites in the
 3401      server's preference list will be accepted.  (Note that the option
 3402      applies only when resuming a session, so the earlier behavior was
 3403      just about the algorithm choice for symmetric cryptography.)
 3404      [Bodo Moeller]
 3405 
 3406  Changes between 0.9.8h and 0.9.8i  [15 Sep 2008]
 3407 
 3408   *) Fix NULL pointer dereference if a DTLS server received
 3409      ChangeCipherSpec as first record (CVE-2009-1386).
 3410      [PR #1679]
 3411 
 3412   *) Fix a state transitition in s3_srvr.c and d1_srvr.c
 3413      (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
 3414      [Nagendra Modadugu]
 3415 
 3416   *) The fix in 0.9.8c that supposedly got rid of unsafe
 3417      double-checked locking was incomplete for RSA blinding,
 3418      addressing just one layer of what turns out to have been
 3419      doubly unsafe triple-checked locking.
 3420 
 3421      So now fix this for real by retiring the MONT_HELPER macro
 3422      in crypto/rsa/rsa_eay.c.
 3423 
 3424      [Bodo Moeller; problem pointed out by Marius Schilder]
 3425 
 3426   *) Various precautionary measures:
 3427 
 3428      - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
 3429 
 3430      - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
 3431        (NB: This would require knowledge of the secret session ticket key
 3432        to exploit, in which case you'd be SOL either way.)
 3433 
 3434      - Change bn_nist.c so that it will properly handle input BIGNUMs
 3435        outside the expected range.
 3436 
 3437      - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
 3438        builds.
 3439 
 3440      [Neel Mehta, Bodo Moeller]
 3441 
 3442   *) Allow engines to be "soft loaded" - i.e. optionally don't die if
 3443      the load fails. Useful for distros.
 3444      [Ben Laurie and the FreeBSD team]
 3445 
 3446   *) Add support for Local Machine Keyset attribute in PKCS#12 files.
 3447      [Steve Henson]
 3448 
 3449   *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
 3450      [Huang Ying]
 3451 
 3452   *) Expand ENGINE to support engine supplied SSL client certificate functions.
 3453 
 3454      This work was sponsored by Logica.
 3455      [Steve Henson]
 3456 
 3457   *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
 3458      keystores. Support for SSL/TLS client authentication too.
 3459      Not compiled unless enable-capieng specified to Configure.
 3460 
 3461      This work was sponsored by Logica.
 3462      [Steve Henson]
 3463 
 3464   *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
 3465      ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
 3466      attribute creation routines such as certifcate requests and PKCS#12
 3467      files.
 3468      [Steve Henson]
 3469 
 3470  Changes between 0.9.8g and 0.9.8h  [28 May 2008]
 3471 
 3472   *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
 3473      handshake which could lead to a cilent crash as found using the
 3474      Codenomicon TLS test suite (CVE-2008-1672) 
 3475      [Steve Henson, Mark Cox]
 3476 
 3477   *) Fix double free in TLS server name extensions which could lead to
 3478      a remote crash found by Codenomicon TLS test suite (CVE-2008-0891) 
 3479      [Joe Orton]
 3480 
 3481   *) Clear error queue in SSL_CTX_use_certificate_chain_file()
 3482 
 3483      Clear the error queue to ensure that error entries left from
 3484      older function calls do not interfere with the correct operation.
 3485      [Lutz Jaenicke, Erik de Castro Lopo]
 3486 
 3487   *) Remove root CA certificates of commercial CAs:
 3488 
 3489      The OpenSSL project does not recommend any specific CA and does not
 3490      have any policy with respect to including or excluding any CA.
 3491      Therefore it does not make any sense to ship an arbitrary selection
 3492      of root CA certificates with the OpenSSL software.
 3493      [Lutz Jaenicke]
 3494 
 3495   *) RSA OAEP patches to fix two separate invalid memory reads.
 3496      The first one involves inputs when 'lzero' is greater than
 3497      'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
 3498      before the beginning of from). The second one involves inputs where
 3499      the 'db' section contains nothing but zeroes (there is a one-byte
 3500      invalid read after the end of 'db').
 3501      [Ivan Nestlerode <inestlerode@us.ibm.com>]
 3502 
 3503   *) Partial backport from 0.9.9-dev:
 3504 
 3505      Introduce bn_mul_mont (dedicated Montgomery multiplication
 3506      procedure) as a candidate for BIGNUM assembler implementation.
 3507      While 0.9.9-dev uses assembler for various architectures, only
 3508      x86_64 is available by default here in the 0.9.8 branch, and
 3509      32-bit x86 is available through a compile-time setting.
 3510 
 3511      To try the 32-bit x86 assembler implementation, use Configure
 3512      option "enable-montasm" (which exists only for this backport).
 3513 
 3514      As "enable-montasm" for 32-bit x86 disclaims code stability
 3515      anyway, in this constellation we activate additional code
 3516      backported from 0.9.9-dev for further performance improvements,
 3517      namely BN_from_montgomery_word.  (To enable this otherwise,
 3518      e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
 3519 
 3520      [Andy Polyakov (backport partially by Bodo Moeller)]
 3521 
 3522   *) Add TLS session ticket callback. This allows an application to set
 3523      TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
 3524      values. This is useful for key rollover for example where several key
 3525      sets may exist with different names.
 3526      [Steve Henson]
 3527 
 3528   *) Reverse ENGINE-internal logic for caching default ENGINE handles.
 3529      This was broken until now in 0.9.8 releases, such that the only way
 3530      a registered ENGINE could be used (assuming it initialises
 3531      successfully on the host) was to explicitly set it as the default
 3532      for the relevant algorithms. This is in contradiction with 0.9.7
 3533      behaviour and the documentation. With this fix, when an ENGINE is
 3534      registered into a given algorithm's table of implementations, the
 3535      'uptodate' flag is reset so that auto-discovery will be used next
 3536      time a new context for that algorithm attempts to select an
 3537      implementation.
 3538      [Ian Lister (tweaked by Geoff Thorpe)]
 3539 
 3540   *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
 3541      implemention in the following ways:
 3542 
 3543      Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
 3544      hard coded.
 3545 
 3546      Lack of BER streaming support means one pass streaming processing is
 3547      only supported if data is detached: setting the streaming flag is
 3548      ignored for embedded content.
 3549 
 3550      CMS support is disabled by default and must be explicitly enabled
 3551      with the enable-cms configuration option.
 3552      [Steve Henson]
 3553 
 3554   *) Update the GMP engine glue to do direct copies between BIGNUM and
 3555      mpz_t when openssl and GMP use the same limb size. Otherwise the
 3556      existing "conversion via a text string export" trick is still used.
 3557      [Paul Sheer <paulsheer@gmail.com>]
 3558 
 3559   *) Zlib compression BIO. This is a filter BIO which compressed and
 3560      uncompresses any data passed through it.
 3561      [Steve Henson]
 3562 
 3563   *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
 3564      RFC3394 compatible AES key wrapping.
 3565      [Steve Henson]
 3566 
 3567   *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
 3568      sets string data without copying. X509_ALGOR_set0() and
 3569      X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
 3570      data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
 3571      from an X509_ATTRIBUTE structure optionally checking it occurs only
 3572      once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
 3573      data.
 3574      [Steve Henson]
 3575 
 3576   *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
 3577      to get the expected BN_FLG_CONSTTIME behavior.
 3578      [Bodo Moeller (Google)]
 3579   
 3580   *) Netware support:
 3581 
 3582      - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
 3583      - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
 3584      - added some more tests to do_tests.pl
 3585      - fixed RunningProcess usage so that it works with newer LIBC NDKs too
 3586      - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
 3587      - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
 3588        netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
 3589      - various changes to netware.pl to enable gcc-cross builds on Win32
 3590        platform
 3591      - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
 3592      - various changes to fix missing prototype warnings
 3593      - fixed x86nasm.pl to create correct asm files for NASM COFF output
 3594      - added AES, WHIRLPOOL and CPUID assembler code to build files
 3595      - added missing AES assembler make rules to mk1mf.pl
 3596      - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
 3597      [Guenter Knauf <eflash@gmx.net>]
 3598 
 3599   *) Implement certificate status request TLS extension defined in RFC3546.
 3600      A client can set the appropriate parameters and receive the encoded
 3601      OCSP response via a callback. A server can query the supplied parameters
 3602      and set the encoded OCSP response in the callback. Add simplified examples
 3603      to s_client and s_server.
 3604      [Steve Henson]
 3605 
 3606  Changes between 0.9.8f and 0.9.8g  [19 Oct 2007]
 3607 
 3608   *) Fix various bugs:
 3609      + Binary incompatibility of ssl_ctx_st structure
 3610      + DTLS interoperation with non-compliant servers
 3611      + Don't call get_session_cb() without proposed session
 3612      + Fix ia64 assembler code
 3613      [Andy Polyakov, Steve Henson]
 3614 
 3615  Changes between 0.9.8e and 0.9.8f  [11 Oct 2007]
 3616 
 3617   *) DTLS Handshake overhaul. There were longstanding issues with
 3618      OpenSSL DTLS implementation, which were making it impossible for
 3619      RFC 4347 compliant client to communicate with OpenSSL server.
 3620      Unfortunately just fixing these incompatibilities would "cut off"
 3621      pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
 3622      server keeps tolerating non RFC compliant syntax. The opposite is
 3623      not true, 0.9.8f client can not communicate with earlier server.
 3624      This update even addresses CVE-2007-4995.
 3625      [Andy Polyakov]
 3626 
 3627   *) Changes to avoid need for function casts in OpenSSL: some compilers
 3628      (gcc 4.2 and later) reject their use.
 3629      [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
 3630       Steve Henson]
 3631   
 3632   *) Add RFC4507 support to OpenSSL. This includes the corrections in
 3633      RFC4507bis. The encrypted ticket format is an encrypted encoded
 3634      SSL_SESSION structure, that way new session features are automatically
 3635      supported.
 3636 
 3637      If a client application caches session in an SSL_SESSION structure
 3638      support is transparent because tickets are now stored in the encoded
 3639      SSL_SESSION.
 3640      
 3641      The SSL_CTX structure automatically generates keys for ticket
 3642      protection in servers so again support should be possible
 3643      with no application modification.
 3644 
 3645      If a client or server wishes to disable RFC4507 support then the option
 3646      SSL_OP_NO_TICKET can be set.
 3647 
 3648      Add a TLS extension debugging callback to allow the contents of any client
 3649      or server extensions to be examined.
 3650 
 3651      This work was sponsored by Google.
 3652      [Steve Henson]
 3653 
 3654   *) Add initial support for TLS extensions, specifically for the server_name
 3655      extension so far.  The SSL_SESSION, SSL_CTX, and SSL data structures now
 3656      have new members for a host name.  The SSL data structure has an
 3657      additional member SSL_CTX *initial_ctx so that new sessions can be
 3658      stored in that context to allow for session resumption, even after the
 3659      SSL has been switched to a new SSL_CTX in reaction to a client's
 3660      server_name extension.
 3661 
 3662      New functions (subject to change):
 3663 
 3664          SSL_get_servername()
 3665          SSL_get_servername_type()
 3666          SSL_set_SSL_CTX()
 3667 
 3668      New CTRL codes and macros (subject to change):
 3669 
 3670          SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
 3671                                  - SSL_CTX_set_tlsext_servername_callback()
 3672          SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
 3673                                       - SSL_CTX_set_tlsext_servername_arg()
 3674          SSL_CTRL_SET_TLSEXT_HOSTNAME           - SSL_set_tlsext_host_name()
 3675 
 3676      openssl s_client has a new '-servername ...' option.
 3677 
 3678      openssl s_server has new options '-servername_host ...', '-cert2 ...',
 3679      '-key2 ...', '-servername_fatal' (subject to change).  This allows
 3680      testing the HostName extension for a specific single host name ('-cert'
 3681      and '-key' remain fallbacks for handshakes without HostName
 3682      negotiation).  If the unrecogninzed_name alert has to be sent, this by
 3683      default is a warning; it becomes fatal with the '-servername_fatal'
 3684      option.
 3685 
 3686      [Peter Sylvester,  Remy Allais, Christophe Renou, Steve Henson]
 3687 
 3688   *) Add AES and SSE2 assembly language support to VC++ build.
 3689      [Steve Henson]
 3690 
 3691   *) Mitigate attack on final subtraction in Montgomery reduction.
 3692      [Andy Polyakov]
 3693 
 3694   *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
 3695      (which previously caused an internal error).
 3696      [Bodo Moeller]
 3697 
 3698   *) Squeeze another 10% out of IGE mode when in != out.
 3699      [Ben Laurie]
 3700 
 3701   *) AES IGE mode speedup.
 3702      [Dean Gaudet (Google)]
 3703 
 3704   *) Add the Korean symmetric 128-bit cipher SEED (see
 3705      http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
 3706      add SEED ciphersuites from RFC 4162:
 3707 
 3708         TLS_RSA_WITH_SEED_CBC_SHA      =  "SEED-SHA"
 3709         TLS_DHE_DSS_WITH_SEED_CBC_SHA  =  "DHE-DSS-SEED-SHA"
 3710         TLS_DHE_RSA_WITH_SEED_CBC_SHA  =  "DHE-RSA-SEED-SHA"
 3711         TLS_DH_anon_WITH_SEED_CBC_SHA  =  "ADH-SEED-SHA"
 3712 
 3713      To minimize changes between patchlevels in the OpenSSL 0.9.8
 3714      series, SEED remains excluded from compilation unless OpenSSL
 3715      is configured with 'enable-seed'.
 3716      [KISA, Bodo Moeller]
 3717 
 3718   *) Mitigate branch prediction attacks, which can be practical if a
 3719      single processor is shared, allowing a spy process to extract
 3720      information.  For detailed background information, see
 3721      http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
 3722      J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
 3723      and Necessary Software Countermeasures").  The core of the change
 3724      are new versions BN_div_no_branch() and
 3725      BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
 3726      respectively, which are slower, but avoid the security-relevant
 3727      conditional branches.  These are automatically called by BN_div()
 3728      and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
 3729      of the input BIGNUMs.  Also, BN_is_bit_set() has been changed to
 3730      remove a conditional branch.
 3731 
 3732      BN_FLG_CONSTTIME is the new name for the previous
 3733      BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
 3734      modular exponentiation.  (Since OpenSSL 0.9.7h, setting this flag
 3735      in the exponent causes BN_mod_exp_mont() to use the alternative
 3736      implementation in BN_mod_exp_mont_consttime().)  The old name
 3737      remains as a deprecated alias.
 3738 
 3739      Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
 3740      RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
 3741      constant-time implementations for more than just exponentiation.
 3742      Here too the old name is kept as a deprecated alias.
 3743 
 3744      BN_BLINDING_new() will now use BN_dup() for the modulus so that
 3745      the BN_BLINDING structure gets an independent copy of the
 3746      modulus.  This means that the previous "BIGNUM *m" argument to
 3747      BN_BLINDING_new() and to BN_BLINDING_create_param() now
 3748      essentially becomes "const BIGNUM *m", although we can't actually
 3749      change this in the header file before 0.9.9.  It allows
 3750      RSA_setup_blinding() to use BN_with_flags() on the modulus to
 3751      enable BN_FLG_CONSTTIME.
 3752 
 3753      [Matthew D Wood (Intel Corp)]
 3754 
 3755   *) In the SSL/TLS server implementation, be strict about session ID
 3756      context matching (which matters if an application uses a single
 3757      external cache for different purposes).  Previously,
 3758      out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
 3759      set.  This did ensure strict client verification, but meant that,
 3760      with applications using a single external cache for quite
 3761      different requirements, clients could circumvent ciphersuite
 3762      restrictions for a given session ID context by starting a session
 3763      in a different context.
 3764      [Bodo Moeller]
 3765 
 3766   *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
 3767      a ciphersuite string such as "DEFAULT:RSA" cannot enable
 3768      authentication-only ciphersuites.
 3769      [Bodo Moeller]
 3770 
 3771   *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
 3772      not complete and could lead to a possible single byte overflow
 3773      (CVE-2007-5135) [Ben Laurie]
 3774 
 3775  Changes between 0.9.8d and 0.9.8e  [23 Feb 2007]
 3776 
 3777   *) Since AES128 and AES256 (and similarly Camellia128 and
 3778      Camellia256) share a single mask bit in the logic of
 3779      ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
 3780      kludge to work properly if AES128 is available and AES256 isn't
 3781      (or if Camellia128 is available and Camellia256 isn't).
 3782      [Victor Duchovni]
 3783 
 3784   *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
 3785      (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
 3786      When a point or a seed is encoded in a BIT STRING, we need to
 3787      prevent the removal of trailing zero bits to get the proper DER
 3788      encoding.  (By default, crypto/asn1/a_bitstr.c assumes the case
 3789      of a NamedBitList, for which trailing 0 bits need to be removed.)
 3790      [Bodo Moeller]
 3791 
 3792   *) Have SSL/TLS server implementation tolerate "mismatched" record
 3793      protocol version while receiving ClientHello even if the
 3794      ClientHello is fragmented.  (The server can't insist on the
 3795      particular protocol version it has chosen before the ServerHello
 3796      message has informed the client about his choice.)
 3797      [Bodo Moeller]
 3798 
 3799   *) Add RFC 3779 support.
 3800      [Rob Austein for ARIN, Ben Laurie]
 3801 
 3802   *) Load error codes if they are not already present instead of using a
 3803      static variable. This allows them to be cleanly unloaded and reloaded.
 3804      Improve header file function name parsing.
 3805      [Steve Henson]
 3806 
 3807   *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
 3808      or CAPABILITY handshake as required by RFCs.
 3809      [Goetz Babin-Ebell]
 3810 
 3811  Changes between 0.9.8c and 0.9.8d  [28 Sep 2006]
 3812 
 3813   *) Introduce limits to prevent malicious keys being able to
 3814      cause a denial of service.  (CVE-2006-2940)
 3815      [Steve Henson, Bodo Moeller]
 3816 
 3817   *) Fix ASN.1 parsing of certain invalid structures that can result
 3818      in a denial of service.  (CVE-2006-2937)  [Steve Henson]
 3819 
 3820   *) Fix buffer overflow in SSL_get_shared_ciphers() function. 
 3821      (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
 3822 
 3823   *) Fix SSL client code which could crash if connecting to a
 3824      malicious SSLv2 server.  (CVE-2006-4343)
 3825      [Tavis Ormandy and Will Drewry, Google Security Team]
 3826 
 3827   *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
 3828      match only those.  Before that, "AES256-SHA" would be interpreted
 3829      as a pattern and match "AES128-SHA" too (since AES128-SHA got
 3830      the same strength classification in 0.9.7h) as we currently only
 3831      have a single AES bit in the ciphersuite description bitmap.
 3832      That change, however, also applied to ciphersuite strings such as
 3833      "RC4-MD5" that intentionally matched multiple ciphersuites --
 3834      namely, SSL 2.0 ciphersuites in addition to the more common ones
 3835      from SSL 3.0/TLS 1.0.
 3836 
 3837      So we change the selection algorithm again: Naming an explicit
 3838      ciphersuite selects this one ciphersuite, and any other similar
 3839      ciphersuite (same bitmap) from *other* protocol versions.
 3840      Thus, "RC4-MD5" again will properly select both the SSL 2.0
 3841      ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
 3842 
 3843      Since SSL 2.0 does not have any ciphersuites for which the
 3844      128/256 bit distinction would be relevant, this works for now.
 3845      The proper fix will be to use different bits for AES128 and
 3846      AES256, which would have avoided the problems from the beginning;
 3847      however, bits are scarce, so we can only do this in a new release
 3848      (not just a patchlevel) when we can change the SSL_CIPHER
 3849      definition to split the single 'unsigned long mask' bitmap into
 3850      multiple values to extend the available space.
 3851 
 3852      [Bodo Moeller]
 3853 
 3854  Changes between 0.9.8b and 0.9.8c  [05 Sep 2006]
 3855 
 3856   *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
 3857      (CVE-2006-4339)  [Ben Laurie and Google Security Team]
 3858 
 3859   *) Add AES IGE and biIGE modes.
 3860      [Ben Laurie]
 3861 
 3862   *) Change the Unix randomness entropy gathering to use poll() when
 3863      possible instead of select(), since the latter has some
 3864      undesirable limitations.
 3865      [Darryl Miles via Richard Levitte and Bodo Moeller]
 3866 
 3867   *) Disable "ECCdraft" ciphersuites more thoroughly.  Now special
 3868      treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
 3869      cannot be implicitly activated as part of, e.g., the "AES" alias.
 3870      However, please upgrade to OpenSSL 0.9.9[-dev] for
 3871      non-experimental use of the ECC ciphersuites to get TLS extension
 3872      support, which is required for curve and point format negotiation
 3873      to avoid potential handshake problems.
 3874      [Bodo Moeller]
 3875 
 3876   *) Disable rogue ciphersuites:
 3877 
 3878       - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
 3879       - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
 3880       - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
 3881 
 3882      The latter two were purportedly from
 3883      draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
 3884      appear there.
 3885 
 3886      Also deactivate the remaining ciphersuites from
 3887      draft-ietf-tls-56-bit-ciphersuites-01.txt.  These are just as
 3888      unofficial, and the ID has long expired.
 3889      [Bodo Moeller]
 3890 
 3891   *) Fix RSA blinding Heisenbug (problems sometimes occured on
 3892      dual-core machines) and other potential thread-safety issues.
 3893      [Bodo Moeller]
 3894 
 3895   *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
 3896      versions), which is now available for royalty-free use
 3897      (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
 3898      Also, add Camellia TLS ciphersuites from RFC 4132.
 3899 
 3900      To minimize changes between patchlevels in the OpenSSL 0.9.8
 3901      series, Camellia remains excluded from compilation unless OpenSSL
 3902      is configured with 'enable-camellia'.
 3903      [NTT]
 3904 
 3905   *) Disable the padding bug check when compression is in use. The padding
 3906      bug check assumes the first packet is of even length, this is not
 3907      necessarily true if compresssion is enabled and can result in false
 3908      positives causing handshake failure. The actual bug test is ancient
 3909      code so it is hoped that implementations will either have fixed it by
 3910      now or any which still have the bug do not support compression.
 3911      [Steve Henson]
 3912 
 3913  Changes between 0.9.8a and 0.9.8b  [04 May 2006]
 3914 
 3915   *) When applying a cipher rule check to see if string match is an explicit
 3916      cipher suite and only match that one cipher suite if it is.
 3917      [Steve Henson]
 3918 
 3919   *) Link in manifests for VC++ if needed.
 3920      [Austin Ziegler <halostatue@gmail.com>]
 3921 
 3922   *) Update support for ECC-based TLS ciphersuites according to
 3923      draft-ietf-tls-ecc-12.txt with proposed changes (but without
 3924      TLS extensions, which are supported starting with the 0.9.9
 3925      branch, not in the OpenSSL 0.9.8 branch).
 3926      [Douglas Stebila]
 3927 
 3928   *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
 3929      opaque EVP_CIPHER_CTX handling.
 3930      [Steve Henson]
 3931 
 3932   *) Fixes and enhancements to zlib compression code. We now only use
 3933      "zlib1.dll" and use the default __cdecl calling convention on Win32
 3934      to conform with the standards mentioned here:
 3935            http://www.zlib.net/DLL_FAQ.txt
 3936      Static zlib linking now works on Windows and the new --with-zlib-include
 3937      --with-zlib-lib options to Configure can be used to supply the location
 3938      of the headers and library. Gracefully handle case where zlib library
 3939      can't be loaded.
 3940      [Steve Henson]
 3941 
 3942   *) Several fixes and enhancements to the OID generation code. The old code
 3943      sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
 3944      handle numbers larger than ULONG_MAX, truncated printing and had a
 3945      non standard OBJ_obj2txt() behaviour.
 3946      [Steve Henson]
 3947 
 3948   *) Add support for building of engines under engine/ as shared libraries
 3949      under VC++ build system.
 3950      [Steve Henson]
 3951 
 3952   *) Corrected the numerous bugs in the Win32 path splitter in DSO.
 3953      Hopefully, we will not see any false combination of paths any more.
 3954      [Richard Levitte]
 3955 
 3956  Changes between 0.9.8 and 0.9.8a  [11 Oct 2005]
 3957 
 3958   *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
 3959      (part of SSL_OP_ALL).  This option used to disable the
 3960      countermeasure against man-in-the-middle protocol-version
 3961      rollback in the SSL 2.0 server implementation, which is a bad
 3962      idea.  (CVE-2005-2969)
 3963 
 3964      [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
 3965      for Information Security, National Institute of Advanced Industrial
 3966      Science and Technology [AIST], Japan)]
 3967 
 3968   *) Add two function to clear and return the verify parameter flags.
 3969      [Steve Henson]
 3970 
 3971   *) Keep cipherlists sorted in the source instead of sorting them at
 3972      runtime, thus removing the need for a lock.
 3973      [Nils Larsch]
 3974 
 3975   *) Avoid some small subgroup attacks in Diffie-Hellman.
 3976      [Nick Mathewson and Ben Laurie]
 3977 
 3978   *) Add functions for well-known primes.
 3979      [Nick Mathewson]
 3980 
 3981   *) Extended Windows CE support.
 3982      [Satoshi Nakamura and Andy Polyakov]
 3983 
 3984   *) Initialize SSL_METHOD structures at compile time instead of during
 3985      runtime, thus removing the need for a lock.
 3986      [Steve Henson]
 3987 
 3988   *) Make PKCS7_decrypt() work even if no certificate is supplied by
 3989      attempting to decrypt each encrypted key in turn. Add support to
 3990      smime utility.
 3991      [Steve Henson]
 3992 
 3993  Changes between 0.9.7h and 0.9.8  [05 Jul 2005]
 3994 
 3995   [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
 3996   OpenSSL 0.9.8.]
 3997 
 3998   *) Add libcrypto.pc and libssl.pc for those who feel they need them.
 3999      [Richard Levitte]
 4000 
 4001   *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
 4002      key into the same file any more.
 4003      [Richard Levitte]
 4004 
 4005   *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
 4006      [Andy Polyakov]
 4007 
 4008   *) Add -utf8 command line and config file option to 'ca'.
 4009      [Stefan <stf@udoma.org]
 4010 
 4011   *) Removed the macro des_crypt(), as it seems to conflict with some
 4012      libraries.  Use DES_crypt().
 4013      [Richard Levitte]
 4014 
 4015   *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
 4016      involves renaming the source and generated shared-libs for
 4017      both. The engines will accept the corrected or legacy ids
 4018      ('ncipher' and '4758_cca' respectively) when binding. NB,
 4019      this only applies when building 'shared'.
 4020      [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
 4021 
 4022   *) Add attribute functions to EVP_PKEY structure. Modify
 4023      PKCS12_create() to recognize a CSP name attribute and
 4024      use it. Make -CSP option work again in pkcs12 utility.
 4025      [Steve Henson]
 4026 
 4027   *) Add new functionality to the bn blinding code:
 4028      - automatic re-creation of the BN_BLINDING parameters after
 4029        a fixed number of uses (currently 32)
 4030      - add new function for parameter creation
 4031      - introduce flags to control the update behaviour of the
 4032        BN_BLINDING parameters
 4033      - hide BN_BLINDING structure
 4034      Add a second BN_BLINDING slot to the RSA structure to improve
 4035      performance when a single RSA object is shared among several
 4036      threads.
 4037      [Nils Larsch]
 4038 
 4039   *) Add support for DTLS.
 4040      [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
 4041 
 4042   *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
 4043      to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
 4044      [Walter Goulet]
 4045 
 4046   *) Remove buggy and incompletet DH cert support from
 4047      ssl/ssl_rsa.c and ssl/s3_both.c
 4048      [Nils Larsch]
 4049 
 4050   *) Use SHA-1 instead of MD5 as the default digest algorithm for
 4051      the apps/openssl applications.
 4052      [Nils Larsch]
 4053 
 4054   *) Compile clean with "-Wall -Wmissing-prototypes
 4055      -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
 4056      DEBUG_SAFESTACK must also be set.
 4057      [Ben Laurie]
 4058 
 4059   *) Change ./Configure so that certain algorithms can be disabled by default.
 4060      The new counterpiece to "no-xxx" is "enable-xxx".
 4061 
 4062      The patented RC5 and MDC2 algorithms will now be disabled unless
 4063      "enable-rc5" and "enable-mdc2", respectively, are specified.
 4064 
 4065      (IDEA remains enabled despite being patented.  This is because IDEA
 4066      is frequently required for interoperability, and there is no license
 4067      fee for non-commercial use.  As before, "no-idea" can be used to
 4068      avoid this algorithm.)
 4069 
 4070      [Bodo Moeller]
 4071 
 4072   *) Add processing of proxy certificates (see RFC 3820).  This work was
 4073      sponsored by KTH (The Royal Institute of Technology in Stockholm) and
 4074      EGEE (Enabling Grids for E-science in Europe).
 4075      [Richard Levitte]
 4076 
 4077   *) RC4 performance overhaul on modern architectures/implementations, such
 4078      as Intel P4, IA-64 and AMD64.
 4079      [Andy Polyakov]
 4080 
 4081   *) New utility extract-section.pl. This can be used specify an alternative
 4082      section number in a pod file instead of having to treat each file as
 4083      a separate case in Makefile. This can be done by adding two lines to the
 4084      pod file:
 4085 
 4086      =for comment openssl_section:XXX
 4087 
 4088      The blank line is mandatory.
 4089 
 4090      [Steve Henson]
 4091 
 4092   *) New arguments -certform, -keyform and -pass for s_client and s_server
 4093      to allow alternative format key and certificate files and passphrase
 4094      sources.
 4095      [Steve Henson]
 4096 
 4097   *) New structure X509_VERIFY_PARAM which combines current verify parameters,
 4098      update associated structures and add various utility functions.
 4099 
 4100      Add new policy related verify parameters, include policy checking in 
 4101      standard verify code. Enhance 'smime' application with extra parameters
 4102      to support policy checking and print out.
 4103      [Steve Henson]
 4104 
 4105   *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
 4106      Nehemiah processors. These extensions support AES encryption in hardware
 4107      as well as RNG (though RNG support is currently disabled).
 4108      [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
 4109 
 4110   *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
 4111      [Geoff Thorpe]
 4112 
 4113   *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
 4114      [Andy Polyakov and a number of other people]
 4115 
 4116   *) Improved PowerPC platform support. Most notably BIGNUM assembler
 4117      implementation contributed by IBM.
 4118      [Suresh Chari, Peter Waltenberg, Andy Polyakov]
 4119 
 4120   *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
 4121      exponent rather than 'unsigned long'. There is a corresponding change to
 4122      the new 'rsa_keygen' element of the RSA_METHOD structure.
 4123      [Jelte Jansen, Geoff Thorpe]
 4124 
 4125   *) Functionality for creating the initial serial number file is now
 4126      moved from CA.pl to the 'ca' utility with a new option -create_serial.
 4127 
 4128      (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
 4129      number file to 1, which is bound to cause problems.  To avoid
 4130      the problems while respecting compatibility between different 0.9.7
 4131      patchlevels, 0.9.7e  employed 'openssl x509 -next_serial' in
 4132      CA.pl for serial number initialization.  With the new release 0.9.8,
 4133      we can fix the problem directly in the 'ca' utility.)
 4134      [Steve Henson]
 4135 
 4136   *) Reduced header interdepencies by declaring more opaque objects in
 4137      ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
 4138      give fewer recursive includes, which could break lazy source code - so
 4139      this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
 4140      developers should define this symbol when building and using openssl to
 4141      ensure they track the recommended behaviour, interfaces, [etc], but
 4142      backwards-compatible behaviour prevails when this isn't defined.
 4143      [Geoff Thorpe]
 4144 
 4145   *) New function X509_POLICY_NODE_print() which prints out policy nodes.
 4146      [Steve Henson]
 4147 
 4148   *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
 4149      This will generate a random key of the appropriate length based on the 
 4150      cipher context. The EVP_CIPHER can provide its own random key generation
 4151      routine to support keys of a specific form. This is used in the des and 
 4152      3des routines to generate a key of the correct parity. Update S/MIME
 4153      code to use new functions and hence generate correct parity DES keys.
 4154      Add EVP_CHECK_DES_KEY #define to return an error if the key is not 
 4155      valid (weak or incorrect parity).
 4156      [Steve Henson]
 4157 
 4158   *) Add a local set of CRLs that can be used by X509_verify_cert() as well
 4159      as looking them up. This is useful when the verified structure may contain
 4160      CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
 4161      present unless the new PKCS7_NO_CRL flag is asserted.
 4162      [Steve Henson]
 4163 
 4164   *) Extend ASN1 oid configuration module. It now additionally accepts the
 4165      syntax:
 4166 
 4167      shortName = some long name, 1.2.3.4
 4168      [Steve Henson]
 4169 
 4170   *) Reimplemented the BN_CTX implementation. There is now no more static
 4171      limitation on the number of variables it can handle nor the depth of the
 4172      "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
 4173      information can now expand as required, and rather than having a single
 4174      static array of bignums, BN_CTX now uses a linked-list of such arrays
 4175      allowing it to expand on demand whilst maintaining the usefulness of
 4176      BN_CTX's "bundling".
 4177      [Geoff Thorpe]
 4178 
 4179   *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
 4180      to allow all RSA operations to function using a single BN_CTX.
 4181      [Geoff Thorpe]
 4182 
 4183   *) Preliminary support for certificate policy evaluation and checking. This
 4184      is initially intended to pass the tests outlined in "Conformance Testing
 4185      of Relying Party Client Certificate Path Processing Logic" v1.07.
 4186      [Steve Henson]
 4187 
 4188   *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
 4189      remained unused and not that useful. A variety of other little bignum
 4190      tweaks and fixes have also been made continuing on from the audit (see
 4191      below).
 4192      [Geoff Thorpe]
 4193 
 4194   *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
 4195      associated ASN1, EVP and SSL functions and old ASN1 macros.
 4196      [Richard Levitte]
 4197 
 4198   *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
 4199      and this should never fail. So the return value from the use of
 4200      BN_set_word() (which can fail due to needless expansion) is now deprecated;
 4201      if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
 4202      [Geoff Thorpe]
 4203 
 4204   *) BN_CTX_get() should return zero-valued bignums, providing the same
 4205      initialised value as BN_new().
 4206      [Geoff Thorpe, suggested by Ulf Möller]
 4207 
 4208   *) Support for inhibitAnyPolicy certificate extension.
 4209      [Steve Henson]
 4210 
 4211   *) An audit of the BIGNUM code is underway, for which debugging code is
 4212      enabled when BN_DEBUG is defined. This makes stricter enforcements on what
 4213      is considered valid when processing BIGNUMs, and causes execution to
 4214      assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
 4215      further steps are taken to deliberately pollute unused data in BIGNUM
 4216      structures to try and expose faulty code further on. For now, openssl will
 4217      (in its default mode of operation) continue to tolerate the inconsistent
 4218      forms that it has tolerated in the past, but authors and packagers should
 4219      consider trying openssl and their own applications when compiled with
 4220      these debugging symbols defined. It will help highlight potential bugs in
 4221      their own code, and will improve the test coverage for OpenSSL itself. At
 4222      some point, these tighter rules will become openssl's default to improve
 4223      maintainability, though the assert()s and other overheads will remain only
 4224      in debugging configurations. See bn.h for more details.
 4225      [Geoff Thorpe, Nils Larsch, Ulf Möller]
 4226 
 4227   *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
 4228      that can only be obtained through BN_CTX_new() (which implicitly
 4229      initialises it). The presence of this function only made it possible
 4230      to overwrite an existing structure (and cause memory leaks).
 4231      [Geoff Thorpe]
 4232 
 4233   *) Because of the callback-based approach for implementing LHASH as a
 4234      template type, lh_insert() adds opaque objects to hash-tables and
 4235      lh_doall() or lh_doall_arg() are typically used with a destructor callback
 4236      to clean up those corresponding objects before destroying the hash table
 4237      (and losing the object pointers). So some over-zealous constifications in
 4238      LHASH have been relaxed so that lh_insert() does not take (nor store) the
 4239      objects as "const" and the lh_doall[_arg] callback wrappers are not
 4240      prototyped to have "const" restrictions on the object pointers they are
 4241      given (and so aren't required to cast them away any more).
 4242      [Geoff Thorpe]
 4243 
 4244   *) The tmdiff.h API was so ugly and minimal that our own timing utility
 4245      (speed) prefers to use its own implementation. The two implementations
 4246      haven't been consolidated as yet (volunteers?) but the tmdiff API has had
 4247      its object type properly exposed (MS_TM) instead of casting to/from "char
 4248      *". This may still change yet if someone realises MS_TM and "ms_time_***"
 4249      aren't necessarily the greatest nomenclatures - but this is what was used
 4250      internally to the implementation so I've used that for now.
 4251      [Geoff Thorpe]
 4252 
 4253   *) Ensure that deprecated functions do not get compiled when
 4254      OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
 4255      the self-tests were still using deprecated key-generation functions so
 4256      these have been updated also.
 4257      [Geoff Thorpe]
 4258 
 4259   *) Reorganise PKCS#7 code to separate the digest location functionality
 4260      into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
 4261      New function PKCS7_set_digest() to set the digest type for PKCS#7
 4262      digestedData type. Add additional code to correctly generate the
 4263      digestedData type and add support for this type in PKCS7 initialization
 4264      functions.
 4265      [Steve Henson]
 4266 
 4267   *) New function PKCS7_set0_type_other() this initializes a PKCS7 
 4268      structure of type "other".
 4269      [Steve Henson]
 4270 
 4271   *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
 4272      sure the loop does correctly stop and breaking ("division by zero")
 4273      modulus operations are not performed. The (pre-generated) prime
 4274      table crypto/bn/bn_prime.h was already correct, but it could not be
 4275      re-generated on some platforms because of the "division by zero"
 4276      situation in the script.
 4277      [Ralf S. Engelschall]
 4278 
 4279   *) Update support for ECC-based TLS ciphersuites according to
 4280      draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
 4281      SHA-1 now is only used for "small" curves (where the
 4282      representation of a field element takes up to 24 bytes); for
 4283      larger curves, the field element resulting from ECDH is directly
 4284      used as premaster secret.
 4285      [Douglas Stebila (Sun Microsystems Laboratories)]
 4286 
 4287   *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
 4288      curve secp160r1 to the tests.
 4289      [Douglas Stebila (Sun Microsystems Laboratories)]
 4290 
 4291   *) Add the possibility to load symbols globally with DSO.
 4292      [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
 4293 
 4294   *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
 4295      control of the error stack.
 4296      [Richard Levitte]
 4297 
 4298   *) Add support for STORE in ENGINE.
 4299      [Richard Levitte]
 4300 
 4301   *) Add the STORE type.  The intention is to provide a common interface
 4302      to certificate and key stores, be they simple file-based stores, or
 4303      HSM-type store, or LDAP stores, or...
 4304      NOTE: The code is currently UNTESTED and isn't really used anywhere.
 4305      [Richard Levitte]
 4306 
 4307   *) Add a generic structure called OPENSSL_ITEM.  This can be used to
 4308      pass a list of arguments to any function as well as provide a way
 4309      for a function to pass data back to the caller.
 4310      [Richard Levitte]
 4311 
 4312   *) Add the functions BUF_strndup() and BUF_memdup().  BUF_strndup()
 4313      works like BUF_strdup() but can be used to duplicate a portion of
 4314      a string.  The copy gets NUL-terminated.  BUF_memdup() duplicates
 4315      a memory area.
 4316      [Richard Levitte]
 4317 
 4318   *) Add the function sk_find_ex() which works like sk_find(), but will
 4319      return an index to an element even if an exact match couldn't be
 4320      found.  The index is guaranteed to point at the element where the
 4321      searched-for key would be inserted to preserve sorting order.
 4322      [Richard Levitte]
 4323 
 4324   *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
 4325      takes an extra flags argument for optional functionality.  Currently,
 4326      the following flags are defined:
 4327 
 4328 	OBJ_BSEARCH_VALUE_ON_NOMATCH
 4329 	This one gets OBJ_bsearch_ex() to return a pointer to the first
 4330 	element where the comparing function returns a negative or zero
 4331 	number.
 4332 
 4333 	OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
 4334 	This one gets OBJ_bsearch_ex() to return a pointer to the first
 4335 	element where the comparing function returns zero.  This is useful
 4336 	if there are more than one element where the comparing function
 4337 	returns zero.
 4338      [Richard Levitte]
 4339 
 4340   *) Make it possible to create self-signed certificates with 'openssl ca'
 4341      in such a way that the self-signed certificate becomes part of the
 4342      CA database and uses the same mechanisms for serial number generation
 4343      as all other certificate signing.  The new flag '-selfsign' enables
 4344      this functionality.  Adapt CA.sh and CA.pl.in.
 4345      [Richard Levitte]
 4346 
 4347   *) Add functionality to check the public key of a certificate request
 4348      against a given private.  This is useful to check that a certificate
 4349      request can be signed by that key (self-signing).
 4350      [Richard Levitte]
 4351 
 4352   *) Make it possible to have multiple active certificates with the same
 4353      subject in the CA index file.  This is done only if the keyword
 4354      'unique_subject' is set to 'no' in the main CA section (default
 4355      if 'CA_default') of the configuration file.  The value is saved
 4356      with the database itself in a separate index attribute file,
 4357      named like the index file with '.attr' appended to the name.
 4358      [Richard Levitte]
 4359 
 4360   *) Generate muti valued AVAs using '+' notation in config files for
 4361      req and dirName.
 4362      [Steve Henson]
 4363 
 4364   *) Support for nameConstraints certificate extension.
 4365      [Steve Henson]
 4366 
 4367   *) Support for policyConstraints certificate extension.
 4368      [Steve Henson]
 4369 
 4370   *) Support for policyMappings certificate extension.
 4371      [Steve Henson]
 4372 
 4373   *) Make sure the default DSA_METHOD implementation only uses its
 4374      dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
 4375      and change its own handlers to be NULL so as to remove unnecessary
 4376      indirection. This lets alternative implementations fallback to the
 4377      default implementation more easily.
 4378      [Geoff Thorpe]
 4379 
 4380   *) Support for directoryName in GeneralName related extensions
 4381      in config files.
 4382      [Steve Henson]
 4383 
 4384   *) Make it possible to link applications using Makefile.shared.
 4385      Make that possible even when linking against static libraries!
 4386      [Richard Levitte]
 4387 
 4388   *) Support for single pass processing for S/MIME signing. This now
 4389      means that S/MIME signing can be done from a pipe, in addition
 4390      cleartext signing (multipart/signed type) is effectively streaming
 4391      and the signed data does not need to be all held in memory.
 4392 
 4393      This is done with a new flag PKCS7_STREAM. When this flag is set
 4394      PKCS7_sign() only initializes the PKCS7 structure and the actual signing
 4395      is done after the data is output (and digests calculated) in
 4396      SMIME_write_PKCS7().
 4397      [Steve Henson]
 4398 
 4399   *) Add full support for -rpath/-R, both in shared libraries and
 4400      applications, at least on the platforms where it's known how
 4401      to do it.
 4402      [Richard Levitte]
 4403 
 4404   *) In crypto/ec/ec_mult.c, implement fast point multiplication with
 4405      precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
 4406      will now compute a table of multiples of the generator that
 4407      makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
 4408      faster (notably in the case of a single point multiplication,
 4409      scalar * generator).
 4410      [Nils Larsch, Bodo Moeller]
 4411 
 4412   *) IPv6 support for certificate extensions. The various extensions
 4413      which use the IP:a.b.c.d can now take IPv6 addresses using the
 4414      formats of RFC1884 2.2 . IPv6 addresses are now also displayed
 4415      correctly.
 4416      [Steve Henson]
 4417 
 4418   *) Added an ENGINE that implements RSA by performing private key
 4419      exponentiations with the GMP library. The conversions to and from
 4420      GMP's mpz_t format aren't optimised nor are any montgomery forms
 4421      cached, and on x86 it appears OpenSSL's own performance has caught up.
 4422      However there are likely to be other architectures where GMP could
 4423      provide a boost. This ENGINE is not built in by default, but it can be
 4424      specified at Configure time and should be accompanied by the necessary
 4425      linker additions, eg;
 4426          ./config -DOPENSSL_USE_GMP -lgmp
 4427      [Geoff Thorpe]
 4428 
 4429   *) "openssl engine" will not display ENGINE/DSO load failure errors when
 4430      testing availability of engines with "-t" - the old behaviour is
 4431      produced by increasing the feature's verbosity with "-tt".
 4432      [Geoff Thorpe]
 4433 
 4434   *) ECDSA routines: under certain error conditions uninitialized BN objects
 4435      could be freed. Solution: make sure initialization is performed early
 4436      enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
 4437      via PR#459)
 4438      [Lutz Jaenicke]
 4439 
 4440   *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
 4441      and DH_METHOD (eg. by ENGINE implementations) to override the normal
 4442      software implementations. For DSA and DH, parameter generation can
 4443      also be overriden by providing the appropriate method callbacks.
 4444      [Geoff Thorpe]
 4445 
 4446   *) Change the "progress" mechanism used in key-generation and
 4447      primality testing to functions that take a new BN_GENCB pointer in
 4448      place of callback/argument pairs. The new API functions have "_ex"
 4449      postfixes and the older functions are reimplemented as wrappers for
 4450      the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
 4451      declarations of the old functions to help (graceful) attempts to
 4452      migrate to the new functions. Also, the new key-generation API
 4453      functions operate on a caller-supplied key-structure and return
 4454      success/failure rather than returning a key or NULL - this is to
 4455      help make "keygen" another member function of RSA_METHOD etc.
 4456 
 4457      Example for using the new callback interface:
 4458 
 4459           int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
 4460           void *my_arg = ...;
 4461           BN_GENCB my_cb;
 4462 
 4463           BN_GENCB_set(&my_cb, my_callback, my_arg);
 4464 
 4465           return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
 4466           /* For the meaning of a, b in calls to my_callback(), see the
 4467            * documentation of the function that calls the callback.
 4468            * cb will point to my_cb; my_arg can be retrieved as cb->arg.
 4469            * my_callback should return 1 if it wants BN_is_prime_ex()
 4470            * to continue, or 0 to stop.
 4471            */
 4472 
 4473      [Geoff Thorpe]
 4474 
 4475   *) Change the ZLIB compression method to be stateful, and make it
 4476      available to TLS with the number defined in 
 4477      draft-ietf-tls-compression-04.txt.
 4478      [Richard Levitte]
 4479 
 4480   *) Add the ASN.1 structures and functions for CertificatePair, which
 4481      is defined as follows (according to X.509_4thEditionDraftV6.pdf):
 4482 
 4483      CertificatePair ::= SEQUENCE {
 4484         forward		[0]	Certificate OPTIONAL,
 4485         reverse		[1]	Certificate OPTIONAL,
 4486         -- at least one of the pair shall be present -- }
 4487 
 4488      Also implement the PEM functions to read and write certificate
 4489      pairs, and defined the PEM tag as "CERTIFICATE PAIR".
 4490 
 4491      This needed to be defined, mostly for the sake of the LDAP
 4492      attribute crossCertificatePair, but may prove useful elsewhere as
 4493      well.
 4494      [Richard Levitte]
 4495 
 4496   *) Make it possible to inhibit symlinking of shared libraries in
 4497      Makefile.shared, for Cygwin's sake.
 4498      [Richard Levitte]
 4499 
 4500   *) Extend the BIGNUM API by creating a function 
 4501           void BN_set_negative(BIGNUM *a, int neg);
 4502      and a macro that behave like
 4503           int  BN_is_negative(const BIGNUM *a);
 4504 
 4505      to avoid the need to access 'a->neg' directly in applications.
 4506      [Nils Larsch]
 4507 
 4508   *) Implement fast modular reduction for pseudo-Mersenne primes
 4509      used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
 4510      EC_GROUP_new_curve_GFp() will now automatically use this
 4511      if applicable.
 4512      [Nils Larsch <nla@trustcenter.de>]
 4513 
 4514   *) Add new lock type (CRYPTO_LOCK_BN).
 4515      [Bodo Moeller]
 4516 
 4517   *) Change the ENGINE framework to automatically load engines
 4518      dynamically from specific directories unless they could be
 4519      found to already be built in or loaded.  Move all the
 4520      current engines except for the cryptodev one to a new
 4521      directory engines/.
 4522      The engines in engines/ are built as shared libraries if
 4523      the "shared" options was given to ./Configure or ./config.
 4524      Otherwise, they are inserted in libcrypto.a.
 4525      /usr/local/ssl/engines is the default directory for dynamic
 4526      engines, but that can be overriden at configure time through
 4527      the usual use of --prefix and/or --openssldir, and at run
 4528      time with the environment variable OPENSSL_ENGINES.
 4529      [Geoff Thorpe and Richard Levitte]
 4530 
 4531   *) Add Makefile.shared, a helper makefile to build shared
 4532      libraries.  Addapt Makefile.org.
 4533      [Richard Levitte]
 4534 
 4535   *) Add version info to Win32 DLLs.
 4536      [Peter 'Luna' Runestig" <peter@runestig.com>]
 4537 
 4538   *) Add new 'medium level' PKCS#12 API. Certificates and keys
 4539      can be added using this API to created arbitrary PKCS#12
 4540      files while avoiding the low level API.
 4541 
 4542      New options to PKCS12_create(), key or cert can be NULL and
 4543      will then be omitted from the output file. The encryption
 4544      algorithm NIDs can be set to -1 for no encryption, the mac
 4545      iteration count can be set to 0 to omit the mac.
 4546 
 4547      Enhance pkcs12 utility by making the -nokeys and -nocerts
 4548      options work when creating a PKCS#12 file. New option -nomac
 4549      to omit the mac, NONE can be set for an encryption algorithm.
 4550      New code is modified to use the enhanced PKCS12_create()
 4551      instead of the low level API.
 4552      [Steve Henson]
 4553 
 4554   *) Extend ASN1 encoder to support indefinite length constructed
 4555      encoding. This can output sequences tags and octet strings in
 4556      this form. Modify pk7_asn1.c to support indefinite length
 4557      encoding. This is experimental and needs additional code to
 4558      be useful, such as an ASN1 bio and some enhanced streaming
 4559      PKCS#7 code.
 4560 
 4561      Extend template encode functionality so that tagging is passed
 4562      down to the template encoder.
 4563      [Steve Henson]
 4564 
 4565   *) Let 'openssl req' fail if an argument to '-newkey' is not
 4566      recognized instead of using RSA as a default.
 4567      [Bodo Moeller]
 4568 
 4569   *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
 4570      As these are not official, they are not included in "ALL";
 4571      the "ECCdraft" ciphersuite group alias can be used to select them.
 4572      [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
 4573 
 4574   *) Add ECDH engine support.
 4575      [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
 4576 
 4577   *) Add ECDH in new directory crypto/ecdh/.
 4578      [Douglas Stebila (Sun Microsystems Laboratories)]
 4579 
 4580   *) Let BN_rand_range() abort with an error after 100 iterations
 4581      without success (which indicates a broken PRNG).
 4582      [Bodo Moeller]
 4583 
 4584   *) Change BN_mod_sqrt() so that it verifies that the input value
 4585      is really the square of the return value.  (Previously,
 4586      BN_mod_sqrt would show GIGO behaviour.)
 4587      [Bodo Moeller]
 4588 
 4589   *) Add named elliptic curves over binary fields from X9.62, SECG,
 4590      and WAP/WTLS; add OIDs that were still missing.
 4591 
 4592      [Sheueling Chang Shantz and Douglas Stebila
 4593      (Sun Microsystems Laboratories)]
 4594 
 4595   *) Extend the EC library for elliptic curves over binary fields
 4596      (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
 4597      New EC_METHOD:
 4598 
 4599           EC_GF2m_simple_method
 4600 
 4601      New API functions:
 4602 
 4603           EC_GROUP_new_curve_GF2m
 4604           EC_GROUP_set_curve_GF2m
 4605           EC_GROUP_get_curve_GF2m
 4606           EC_POINT_set_affine_coordinates_GF2m
 4607           EC_POINT_get_affine_coordinates_GF2m
 4608           EC_POINT_set_compressed_coordinates_GF2m
 4609 
 4610      Point compression for binary fields is disabled by default for
 4611      patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
 4612      enable it).
 4613 
 4614      As binary polynomials are represented as BIGNUMs, various members
 4615      of the EC_GROUP and EC_POINT data structures can be shared
 4616      between the implementations for prime fields and binary fields;
 4617      the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
 4618      are essentially identical to their ..._GFp counterparts.
 4619      (For simplicity, the '..._GFp' prefix has been dropped from
 4620      various internal method names.)
 4621 
 4622      An internal 'field_div' method (similar to 'field_mul' and
 4623      'field_sqr') has been added; this is used only for binary fields.
 4624 
 4625      [Sheueling Chang Shantz and Douglas Stebila
 4626      (Sun Microsystems Laboratories)]
 4627 
 4628   *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
 4629      through methods ('mul', 'precompute_mult').
 4630 
 4631      The generic implementations (now internally called 'ec_wNAF_mul'
 4632      and 'ec_wNAF_precomputed_mult') remain the default if these
 4633      methods are undefined.
 4634 
 4635      [Sheueling Chang Shantz and Douglas Stebila
 4636      (Sun Microsystems Laboratories)]
 4637 
 4638   *) New function EC_GROUP_get_degree, which is defined through
 4639      EC_METHOD.  For curves over prime fields, this returns the bit
 4640      length of the modulus.
 4641 
 4642      [Sheueling Chang Shantz and Douglas Stebila
 4643      (Sun Microsystems Laboratories)]
 4644 
 4645   *) New functions EC_GROUP_dup, EC_POINT_dup.
 4646      (These simply call ..._new  and ..._copy).
 4647 
 4648      [Sheueling Chang Shantz and Douglas Stebila
 4649      (Sun Microsystems Laboratories)]
 4650 
 4651   *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
 4652      Polynomials are represented as BIGNUMs (where the sign bit is not
 4653      used) in the following functions [macros]:  
 4654 
 4655           BN_GF2m_add
 4656           BN_GF2m_sub             [= BN_GF2m_add]
 4657           BN_GF2m_mod             [wrapper for BN_GF2m_mod_arr]
 4658           BN_GF2m_mod_mul         [wrapper for BN_GF2m_mod_mul_arr]
 4659           BN_GF2m_mod_sqr         [wrapper for BN_GF2m_mod_sqr_arr]
 4660           BN_GF2m_mod_inv
 4661           BN_GF2m_mod_exp         [wrapper for BN_GF2m_mod_exp_arr]
 4662           BN_GF2m_mod_sqrt        [wrapper for BN_GF2m_mod_sqrt_arr]
 4663           BN_GF2m_mod_solve_quad  [wrapper for BN_GF2m_mod_solve_quad_arr]
 4664           BN_GF2m_cmp             [= BN_ucmp]
 4665 
 4666      (Note that only the 'mod' functions are actually for fields GF(2^m).
 4667      BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
 4668 
 4669      For some functions, an the irreducible polynomial defining a
 4670      field can be given as an 'unsigned int[]' with strictly
 4671      decreasing elements giving the indices of those bits that are set;
 4672      i.e., p[] represents the polynomial
 4673           f(t) = t^p[0] + t^p[1] + ... + t^p[k]
 4674      where
 4675           p[0] > p[1] > ... > p[k] = 0.
 4676      This applies to the following functions:
 4677 
 4678           BN_GF2m_mod_arr
 4679           BN_GF2m_mod_mul_arr
 4680           BN_GF2m_mod_sqr_arr
 4681           BN_GF2m_mod_inv_arr        [wrapper for BN_GF2m_mod_inv]
 4682           BN_GF2m_mod_div_arr        [wrapper for BN_GF2m_mod_div]
 4683           BN_GF2m_mod_exp_arr
 4684           BN_GF2m_mod_sqrt_arr
 4685           BN_GF2m_mod_solve_quad_arr
 4686           BN_GF2m_poly2arr
 4687           BN_GF2m_arr2poly
 4688 
 4689      Conversion can be performed by the following functions:
 4690 
 4691           BN_GF2m_poly2arr
 4692           BN_GF2m_arr2poly
 4693 
 4694      bntest.c has additional tests for binary polynomial arithmetic.
 4695 
 4696      Two implementations for BN_GF2m_mod_div() are available.
 4697      The default algorithm simply uses BN_GF2m_mod_inv() and
 4698      BN_GF2m_mod_mul().  The alternative algorithm is compiled in only
 4699      if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
 4700      copyright notice in crypto/bn/bn_gf2m.c before enabling it).
 4701 
 4702      [Sheueling Chang Shantz and Douglas Stebila
 4703      (Sun Microsystems Laboratories)]
 4704 
 4705   *) Add new error code 'ERR_R_DISABLED' that can be used when some
 4706      functionality is disabled at compile-time.
 4707      [Douglas Stebila <douglas.stebila@sun.com>]
 4708 
 4709   *) Change default behaviour of 'openssl asn1parse' so that more
 4710      information is visible when viewing, e.g., a certificate:
 4711 
 4712      Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
 4713      mode the content of non-printable OCTET STRINGs is output in a
 4714      style similar to INTEGERs, but with '[HEX DUMP]' prepended to
 4715      avoid the appearance of a printable string.
 4716      [Nils Larsch <nla@trustcenter.de>]
 4717 
 4718   *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
 4719      functions
 4720           EC_GROUP_set_asn1_flag()
 4721           EC_GROUP_get_asn1_flag()
 4722           EC_GROUP_set_point_conversion_form()
 4723           EC_GROUP_get_point_conversion_form()
 4724      These control ASN1 encoding details:
 4725      - Curves (i.e., groups) are encoded explicitly unless asn1_flag
 4726        has been set to OPENSSL_EC_NAMED_CURVE.
 4727      - Points are encoded in uncompressed form by default; options for
 4728        asn1_for are as for point2oct, namely
 4729           POINT_CONVERSION_COMPRESSED
 4730           POINT_CONVERSION_UNCOMPRESSED
 4731           POINT_CONVERSION_HYBRID
 4732 
 4733      Also add 'seed' and 'seed_len' members to EC_GROUP with access
 4734      functions
 4735           EC_GROUP_set_seed()
 4736           EC_GROUP_get0_seed()
 4737           EC_GROUP_get_seed_len()
 4738      This is used only for ASN1 purposes (so far).
 4739      [Nils Larsch <nla@trustcenter.de>]
 4740 
 4741   *) Add 'field_type' member to EC_METHOD, which holds the NID
 4742      of the appropriate field type OID.  The new function
 4743      EC_METHOD_get_field_type() returns this value.
 4744      [Nils Larsch <nla@trustcenter.de>]
 4745 
 4746   *) Add functions 
 4747           EC_POINT_point2bn()
 4748           EC_POINT_bn2point()
 4749           EC_POINT_point2hex()
 4750           EC_POINT_hex2point()
 4751      providing useful interfaces to EC_POINT_point2oct() and
 4752      EC_POINT_oct2point().
 4753      [Nils Larsch <nla@trustcenter.de>]
 4754 
 4755   *) Change internals of the EC library so that the functions
 4756           EC_GROUP_set_generator()
 4757           EC_GROUP_get_generator()
 4758           EC_GROUP_get_order()
 4759           EC_GROUP_get_cofactor()
 4760      are implemented directly in crypto/ec/ec_lib.c and not dispatched
 4761      to methods, which would lead to unnecessary code duplication when
 4762      adding different types of curves.
 4763      [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
 4764 
 4765   *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
 4766      arithmetic, and such that modified wNAFs are generated
 4767      (which avoid length expansion in many cases).
 4768      [Bodo Moeller]
 4769 
 4770   *) Add a function EC_GROUP_check_discriminant() (defined via
 4771      EC_METHOD) that verifies that the curve discriminant is non-zero.
 4772 
 4773      Add a function EC_GROUP_check() that makes some sanity tests
 4774      on a EC_GROUP, its generator and order.  This includes
 4775      EC_GROUP_check_discriminant().
 4776      [Nils Larsch <nla@trustcenter.de>]
 4777 
 4778   *) Add ECDSA in new directory crypto/ecdsa/.
 4779 
 4780      Add applications 'openssl ecparam' and 'openssl ecdsa'
 4781      (these are based on 'openssl dsaparam' and 'openssl dsa').
 4782 
 4783      ECDSA support is also included in various other files across the
 4784      library.  Most notably,
 4785      - 'openssl req' now has a '-newkey ecdsa:file' option;
 4786      - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
 4787      - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
 4788        d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
 4789        them suitable for ECDSA where domain parameters must be
 4790        extracted before the specific public key;
 4791      - ECDSA engine support has been added.
 4792      [Nils Larsch <nla@trustcenter.de>]
 4793 
 4794   *) Include some named elliptic curves, and add OIDs from X9.62,
 4795      SECG, and WAP/WTLS.  Each curve can be obtained from the new
 4796      function
 4797           EC_GROUP_new_by_curve_name(),
 4798      and the list of available named curves can be obtained with
 4799           EC_get_builtin_curves().
 4800      Also add a 'curve_name' member to EC_GROUP objects, which can be
 4801      accessed via
 4802          EC_GROUP_set_curve_name()
 4803          EC_GROUP_get_curve_name()
 4804      [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
 4805  
 4806   *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
 4807      was actually never needed) and in BN_mul().  The removal in BN_mul()
 4808      required a small change in bn_mul_part_recursive() and the addition
 4809      of the functions bn_cmp_part_words(), bn_sub_part_words() and
 4810      bn_add_part_words(), which do the same thing as bn_cmp_words(),
 4811      bn_sub_words() and bn_add_words() except they take arrays with
 4812      differing sizes.
 4813      [Richard Levitte]
 4814 
 4815  Changes between 0.9.7l and 0.9.7m  [23 Feb 2007]
 4816 
 4817   *) Cleanse PEM buffers before freeing them since they may contain 
 4818      sensitive data.
 4819      [Benjamin Bennett <ben@psc.edu>]
 4820 
 4821   *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
 4822      a ciphersuite string such as "DEFAULT:RSA" cannot enable
 4823      authentication-only ciphersuites.
 4824      [Bodo Moeller]
 4825 
 4826   *) Since AES128 and AES256 share a single mask bit in the logic of
 4827      ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
 4828      kludge to work properly if AES128 is available and AES256 isn't.
 4829      [Victor Duchovni]
 4830 
 4831   *) Expand security boundary to match 1.1.1 module.
 4832      [Steve Henson]
 4833 
 4834   *) Remove redundant features: hash file source, editing of test vectors
 4835      modify fipsld to use external fips_premain.c signature.
 4836      [Steve Henson]
 4837 
 4838   *) New perl script mkfipsscr.pl to create shell scripts or batch files to
 4839      run algorithm test programs.
 4840      [Steve Henson]
 4841 
 4842   *) Make algorithm test programs more tolerant of whitespace.
 4843      [Steve Henson]
 4844 
 4845   *) Have SSL/TLS server implementation tolerate "mismatched" record
 4846      protocol version while receiving ClientHello even if the
 4847      ClientHello is fragmented.  (The server can't insist on the
 4848      particular protocol version it has chosen before the ServerHello
 4849      message has informed the client about his choice.)
 4850      [Bodo Moeller]
 4851 
 4852   *) Load error codes if they are not already present instead of using a
 4853      static variable. This allows them to be cleanly unloaded and reloaded.
 4854      [Steve Henson]
 4855 
 4856  Changes between 0.9.7k and 0.9.7l  [28 Sep 2006]
 4857 
 4858   *) Introduce limits to prevent malicious keys being able to
 4859      cause a denial of service.  (CVE-2006-2940)
 4860      [Steve Henson, Bodo Moeller]
 4861 
 4862   *) Fix ASN.1 parsing of certain invalid structures that can result
 4863      in a denial of service.  (CVE-2006-2937)  [Steve Henson]
 4864 
 4865   *) Fix buffer overflow in SSL_get_shared_ciphers() function. 
 4866      (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
 4867 
 4868   *) Fix SSL client code which could crash if connecting to a
 4869      malicious SSLv2 server.  (CVE-2006-4343)
 4870      [Tavis Ormandy and Will Drewry, Google Security Team]
 4871 
 4872   *) Change ciphersuite string processing so that an explicit
 4873      ciphersuite selects this one ciphersuite (so that "AES256-SHA"
 4874      will no longer include "AES128-SHA"), and any other similar
 4875      ciphersuite (same bitmap) from *other* protocol versions (so that
 4876      "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
 4877      SSL 3.0/TLS 1.0 ciphersuite).  This is a backport combining
 4878      changes from 0.9.8b and 0.9.8d.
 4879      [Bodo Moeller]
 4880 
 4881  Changes between 0.9.7j and 0.9.7k  [05 Sep 2006]
 4882 
 4883   *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
 4884      (CVE-2006-4339)  [Ben Laurie and Google Security Team]
 4885 
 4886   *) Change the Unix randomness entropy gathering to use poll() when
 4887      possible instead of select(), since the latter has some
 4888      undesirable limitations.
 4889      [Darryl Miles via Richard Levitte and Bodo Moeller]
 4890 
 4891   *) Disable rogue ciphersuites:
 4892 
 4893       - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
 4894       - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
 4895       - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
 4896 
 4897      The latter two were purportedly from
 4898      draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
 4899      appear there.
 4900 
 4901      Also deactive the remaining ciphersuites from
 4902      draft-ietf-tls-56-bit-ciphersuites-01.txt.  These are just as
 4903      unofficial, and the ID has long expired.
 4904      [Bodo Moeller]
 4905 
 4906   *) Fix RSA blinding Heisenbug (problems sometimes occured on
 4907      dual-core machines) and other potential thread-safety issues.
 4908      [Bodo Moeller]
 4909 
 4910  Changes between 0.9.7i and 0.9.7j  [04 May 2006]
 4911 
 4912   *) Adapt fipsld and the build system to link against the validated FIPS
 4913      module in FIPS mode.
 4914      [Steve Henson]
 4915 
 4916   *) Fixes for VC++ 2005 build under Windows.
 4917      [Steve Henson]
 4918 
 4919   *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make 
 4920      from a Windows bash shell such as MSYS. It is autodetected from the
 4921      "config" script when run from a VC++ environment. Modify standard VC++
 4922      build to use fipscanister.o from the GNU make build. 
 4923      [Steve Henson]
 4924 
 4925  Changes between 0.9.7h and 0.9.7i  [14 Oct 2005]
 4926 
 4927   *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
 4928      The value now differs depending on if you build for FIPS or not.
 4929      BEWARE!  A program linked with a shared FIPSed libcrypto can't be
 4930      safely run with a non-FIPSed libcrypto, as it may crash because of
 4931      the difference induced by this change.
 4932      [Andy Polyakov]
 4933 
 4934  Changes between 0.9.7g and 0.9.7h  [11 Oct 2005]
 4935 
 4936   *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
 4937      (part of SSL_OP_ALL).  This option used to disable the
 4938      countermeasure against man-in-the-middle protocol-version
 4939      rollback in the SSL 2.0 server implementation, which is a bad
 4940      idea.  (CVE-2005-2969)
 4941 
 4942      [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
 4943      for Information Security, National Institute of Advanced Industrial
 4944      Science and Technology [AIST], Japan)]
 4945 
 4946   *) Minimal support for X9.31 signatures and PSS padding modes. This is
 4947      mainly for FIPS compliance and not fully integrated at this stage.
 4948      [Steve Henson]
 4949 
 4950   *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
 4951      the exponentiation using a fixed-length exponent.  (Otherwise,
 4952      the information leaked through timing could expose the secret key
 4953      after many signatures; cf. Bleichenbacher's attack on DSA with
 4954      biased k.)
 4955      [Bodo Moeller]
 4956 
 4957   *) Make a new fixed-window mod_exp implementation the default for
 4958      RSA, DSA, and DH private-key operations so that the sequence of
 4959      squares and multiplies and the memory access pattern are
 4960      independent of the particular secret key.  This will mitigate
 4961      cache-timing and potential related attacks.
 4962 
 4963      BN_mod_exp_mont_consttime() is the new exponentiation implementation,
 4964      and this is automatically used by BN_mod_exp_mont() if the new flag
 4965      BN_FLG_EXP_CONSTTIME is set for the exponent.  RSA, DSA, and DH
 4966      will use this BN flag for private exponents unless the flag
 4967      RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
 4968      DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
 4969 
 4970      [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
 4971 
 4972   *) Change the client implementation for SSLv23_method() and
 4973      SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
 4974      Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
 4975      (Previously, the SSL 2.0 backwards compatible Client Hello
 4976      message format would be used even with SSL_OP_NO_SSLv2.)
 4977      [Bodo Moeller]
 4978 
 4979   *) Add support for smime-type MIME parameter in S/MIME messages which some
 4980      clients need.
 4981      [Steve Henson]
 4982 
 4983   *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
 4984      a threadsafe manner. Modify rsa code to use new function and add calls
 4985      to dsa and dh code (which had race conditions before).
 4986      [Steve Henson]
 4987 
 4988   *) Include the fixed error library code in the C error file definitions
 4989      instead of fixing them up at runtime. This keeps the error code
 4990      structures constant.
 4991      [Steve Henson]
 4992 
 4993  Changes between 0.9.7f and 0.9.7g  [11 Apr 2005]
 4994 
 4995   [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
 4996   OpenSSL 0.9.8.]
 4997 
 4998   *) Fixes for newer kerberos headers. NB: the casts are needed because
 4999      the 'length' field is signed on one version and unsigned on another
 5000      with no (?) obvious way to tell the difference, without these VC++
 5001      complains. Also the "definition" of FAR (blank) is no longer included
 5002      nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
 5003      some needed definitions.
 5004      [Steve Henson]
 5005 
 5006   *) Undo Cygwin change.
 5007      [Ulf Möller]
 5008 
 5009   *) Added support for proxy certificates according to RFC 3820.
 5010      Because they may be a security thread to unaware applications,
 5011      they must be explicitely allowed in run-time.  See
 5012      docs/HOWTO/proxy_certificates.txt for further information.
 5013      [Richard Levitte]
 5014 
 5015  Changes between 0.9.7e and 0.9.7f  [22 Mar 2005]
 5016 
 5017   *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
 5018      server and client random values. Previously
 5019      (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
 5020      less random data when sizeof(time_t) > 4 (some 64 bit platforms).
 5021 
 5022      This change has negligible security impact because:
 5023 
 5024      1. Server and client random values still have 24 bytes of pseudo random
 5025         data.
 5026 
 5027      2. Server and client random values are sent in the clear in the initial
 5028         handshake.
 5029 
 5030      3. The master secret is derived using the premaster secret (48 bytes in
 5031         size for static RSA ciphersuites) as well as client server and random
 5032         values.
 5033 
 5034      The OpenSSL team would like to thank the UK NISCC for bringing this issue
 5035      to our attention. 
 5036 
 5037      [Stephen Henson, reported by UK NISCC]
 5038 
 5039   *) Use Windows randomness collection on Cygwin.
 5040      [Ulf Möller]
 5041 
 5042   *) Fix hang in EGD/PRNGD query when communication socket is closed
 5043      prematurely by EGD/PRNGD.
 5044      [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
 5045 
 5046   *) Prompt for pass phrases when appropriate for PKCS12 input format.
 5047      [Steve Henson]
 5048 
 5049   *) Back-port of selected performance improvements from development
 5050      branch, as well as improved support for PowerPC platforms.
 5051      [Andy Polyakov]
 5052 
 5053   *) Add lots of checks for memory allocation failure, error codes to indicate
 5054      failure and freeing up memory if a failure occurs.
 5055      [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
 5056 
 5057   *) Add new -passin argument to dgst.
 5058      [Steve Henson]
 5059 
 5060   *) Perform some character comparisons of different types in X509_NAME_cmp:
 5061      this is needed for some certificates that reencode DNs into UTF8Strings
 5062      (in violation of RFC3280) and can't or wont issue name rollover
 5063      certificates.
 5064      [Steve Henson]
 5065 
 5066   *) Make an explicit check during certificate validation to see that
 5067      the CA setting in each certificate on the chain is correct.  As a
 5068      side effect always do the following basic checks on extensions,
 5069      not just when there's an associated purpose to the check:
 5070 
 5071       - if there is an unhandled critical extension (unless the user
 5072         has chosen to ignore this fault)
 5073       - if the path length has been exceeded (if one is set at all)
 5074       - that certain extensions fit the associated purpose (if one has
 5075         been given)
 5076      [Richard Levitte]
 5077 
 5078  Changes between 0.9.7d and 0.9.7e  [25 Oct 2004]
 5079 
 5080   *) Avoid a race condition when CRLs are checked in a multi threaded 
 5081      environment. This would happen due to the reordering of the revoked
 5082      entries during signature checking and serial number lookup. Now the
 5083      encoding is cached and the serial number sort performed under a lock.
 5084      Add new STACK function sk_is_sorted().
 5085      [Steve Henson]
 5086 
 5087   *) Add Delta CRL to the extension code.
 5088      [Steve Henson]
 5089 
 5090   *) Various fixes to s3_pkt.c so alerts are sent properly.
 5091      [David Holmes <d.holmes@f5.com>]
 5092 
 5093   *) Reduce the chances of duplicate issuer name and serial numbers (in
 5094      violation of RFC3280) using the OpenSSL certificate creation utilities.
 5095      This is done by creating a random 64 bit value for the initial serial
 5096      number when a serial number file is created or when a self signed
 5097      certificate is created using 'openssl req -x509'. The initial serial
 5098      number file is created using 'openssl x509 -next_serial' in CA.pl
 5099      rather than being initialized to 1.
 5100      [Steve Henson]
 5101 
 5102  Changes between 0.9.7c and 0.9.7d  [17 Mar 2004]
 5103 
 5104   *) Fix null-pointer assignment in do_change_cipher_spec() revealed           
 5105      by using the Codenomicon TLS Test Tool (CVE-2004-0079)                    
 5106      [Joe Orton, Steve Henson]   
 5107 
 5108   *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
 5109      (CVE-2004-0112)
 5110      [Joe Orton, Steve Henson]   
 5111 
 5112   *) Make it possible to have multiple active certificates with the same
 5113      subject in the CA index file.  This is done only if the keyword
 5114      'unique_subject' is set to 'no' in the main CA section (default
 5115      if 'CA_default') of the configuration file.  The value is saved
 5116      with the database itself in a separate index attribute file,
 5117      named like the index file with '.attr' appended to the name.
 5118      [Richard Levitte]
 5119 
 5120   *) X509 verify fixes. Disable broken certificate workarounds when 
 5121      X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
 5122      keyUsage extension present. Don't accept CRLs with unhandled critical
 5123      extensions: since verify currently doesn't process CRL extensions this
 5124      rejects a CRL with *any* critical extensions. Add new verify error codes
 5125      for these cases.
 5126      [Steve Henson]
 5127 
 5128   *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
 5129      A clarification of RFC2560 will require the use of OCTET STRINGs and 
 5130      some implementations cannot handle the current raw format. Since OpenSSL
 5131      copies and compares OCSP nonces as opaque blobs without any attempt at
 5132      parsing them this should not create any compatibility issues.
 5133      [Steve Henson]
 5134 
 5135   *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
 5136      calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
 5137      this HMAC (and other) operations are several times slower than OpenSSL
 5138      < 0.9.7.
 5139      [Steve Henson]
 5140 
 5141   *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
 5142      [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
 5143 
 5144   *) Use the correct content when signing type "other".
 5145      [Steve Henson]
 5146 
 5147  Changes between 0.9.7b and 0.9.7c  [30 Sep 2003]
 5148 
 5149   *) Fix various bugs revealed by running the NISCC test suite:
 5150 
 5151      Stop out of bounds reads in the ASN1 code when presented with
 5152      invalid tags (CVE-2003-0543 and CVE-2003-0544).
 5153      
 5154      Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
 5155 
 5156      If verify callback ignores invalid public key errors don't try to check
 5157      certificate signature with the NULL public key.
 5158 
 5159      [Steve Henson]
 5160 
 5161   *) New -ignore_err option in ocsp application to stop the server
 5162      exiting on the first error in a request.
 5163      [Steve Henson]
 5164 
 5165   *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
 5166      if the server requested one: as stated in TLS 1.0 and SSL 3.0
 5167      specifications.
 5168      [Steve Henson]
 5169 
 5170   *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
 5171      extra data after the compression methods not only for TLS 1.0
 5172      but also for SSL 3.0 (as required by the specification).
 5173      [Bodo Moeller; problem pointed out by Matthias Loepfe]
 5174 
 5175   *) Change X509_certificate_type() to mark the key as exported/exportable
 5176      when it's 512 *bits* long, not 512 bytes.
 5177      [Richard Levitte]
 5178 
 5179   *) Change AES_cbc_encrypt() so it outputs exact multiple of
 5180      blocks during encryption.
 5181      [Richard Levitte]
 5182 
 5183   *) Various fixes to base64 BIO and non blocking I/O. On write 
 5184      flushes were not handled properly if the BIO retried. On read
 5185      data was not being buffered properly and had various logic bugs.
 5186      This also affects blocking I/O when the data being decoded is a
 5187      certain size.
 5188      [Steve Henson]
 5189 
 5190   *) Various S/MIME bugfixes and compatibility changes:
 5191      output correct application/pkcs7 MIME type if
 5192      PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
 5193      Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
 5194      of files as .eml work). Correctly handle very long lines in MIME
 5195      parser.
 5196      [Steve Henson]
 5197 
 5198  Changes between 0.9.7a and 0.9.7b  [10 Apr 2003]
 5199 
 5200   *) Countermeasure against the Klima-Pokorny-Rosa extension of
 5201      Bleichbacher's attack on PKCS #1 v1.5 padding: treat
 5202      a protocol version number mismatch like a decryption error
 5203      in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
 5204      [Bodo Moeller]
 5205 
 5206   *) Turn on RSA blinding by default in the default implementation
 5207      to avoid a timing attack. Applications that don't want it can call
 5208      RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
 5209      They would be ill-advised to do so in most cases.
 5210      [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
 5211 
 5212   *) Change RSA blinding code so that it works when the PRNG is not
 5213      seeded (in this case, the secret RSA exponent is abused as
 5214      an unpredictable seed -- if it is not unpredictable, there
 5215      is no point in blinding anyway).  Make RSA blinding thread-safe
 5216      by remembering the creator's thread ID in rsa->blinding and
 5217      having all other threads use local one-time blinding factors
 5218      (this requires more computation than sharing rsa->blinding, but
 5219      avoids excessive locking; and if an RSA object is not shared
 5220      between threads, blinding will still be very fast).
 5221      [Bodo Moeller]
 5222 
 5223   *) Fixed a typo bug that would cause ENGINE_set_default() to set an
 5224      ENGINE as defaults for all supported algorithms irrespective of
 5225      the 'flags' parameter. 'flags' is now honoured, so applications
 5226      should make sure they are passing it correctly.
 5227      [Geoff Thorpe]
 5228 
 5229   *) Target "mingw" now allows native Windows code to be generated in
 5230      the Cygwin environment as well as with the MinGW compiler.
 5231      [Ulf Moeller] 
 5232 
 5233  Changes between 0.9.7 and 0.9.7a  [19 Feb 2003]
 5234 
 5235   *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
 5236      via timing by performing a MAC computation even if incorrrect
 5237      block cipher padding has been found.  This is a countermeasure
 5238      against active attacks where the attacker has to distinguish
 5239      between bad padding and a MAC verification error. (CVE-2003-0078)
 5240 
 5241      [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
 5242      Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
 5243      Martin Vuagnoux (EPFL, Ilion)]
 5244 
 5245   *) Make the no-err option work as intended.  The intention with no-err
 5246      is not to have the whole error stack handling routines removed from
 5247      libcrypto, it's only intended to remove all the function name and
 5248      reason texts, thereby removing some of the footprint that may not
 5249      be interesting if those errors aren't displayed anyway.
 5250 
 5251      NOTE: it's still possible for any application or module to have it's
 5252      own set of error texts inserted.  The routines are there, just not
 5253      used by default when no-err is given.
 5254      [Richard Levitte]
 5255 
 5256   *) Add support for FreeBSD on IA64.
 5257      [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
 5258 
 5259   *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
 5260      Kerberos function mit_des_cbc_cksum().  Before this change,
 5261      the value returned by DES_cbc_cksum() was like the one from
 5262      mit_des_cbc_cksum(), except the bytes were swapped.
 5263      [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
 5264 
 5265   *) Allow an application to disable the automatic SSL chain building.
 5266      Before this a rather primitive chain build was always performed in
 5267      ssl3_output_cert_chain(): an application had no way to send the 
 5268      correct chain if the automatic operation produced an incorrect result.
 5269 
 5270      Now the chain builder is disabled if either:
 5271 
 5272      1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
 5273 
 5274      2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
 5275 
 5276      The reasoning behind this is that an application would not want the
 5277      auto chain building to take place if extra chain certificates are
 5278      present and it might also want a means of sending no additional
 5279      certificates (for example the chain has two certificates and the
 5280      root is omitted).
 5281      [Steve Henson]
 5282 
 5283   *) Add the possibility to build without the ENGINE framework.
 5284      [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
 5285 
 5286   *) Under Win32 gmtime() can return NULL: check return value in
 5287      OPENSSL_gmtime(). Add error code for case where gmtime() fails.
 5288      [Steve Henson]
 5289 
 5290   *) DSA routines: under certain error conditions uninitialized BN objects
 5291      could be freed. Solution: make sure initialization is performed early
 5292      enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
 5293      Nils Larsch <nla@trustcenter.de> via PR#459)
 5294      [Lutz Jaenicke]
 5295 
 5296   *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
 5297      checked on reconnect on the client side, therefore session resumption
 5298      could still fail with a "ssl session id is different" error. This
 5299      behaviour is masked when SSL_OP_ALL is used due to
 5300      SSL_OP_MICROSOFT_SESS_ID_BUG being set.
 5301      Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
 5302      followup to PR #377.
 5303      [Lutz Jaenicke]
 5304 
 5305   *) IA-32 assembler support enhancements: unified ELF targets, support
 5306      for SCO/Caldera platforms, fix for Cygwin shared build.
 5307      [Andy Polyakov]
 5308 
 5309   *) Add support for FreeBSD on sparc64.  As a consequence, support for
 5310      FreeBSD on non-x86 processors is separate from x86 processors on
 5311      the config script, much like the NetBSD support.
 5312      [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
 5313 
 5314  Changes between 0.9.6h and 0.9.7  [31 Dec 2002]
 5315 
 5316   [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
 5317   OpenSSL 0.9.7.]
 5318 
 5319   *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
 5320      code (06) was taken as the first octet of the session ID and the last
 5321      octet was ignored consequently. As a result SSLv2 client side session
 5322      caching could not have worked due to the session ID mismatch between
 5323      client and server.
 5324      Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
 5325      PR #377.
 5326      [Lutz Jaenicke]
 5327 
 5328   *) Change the declaration of needed Kerberos libraries to use EX_LIBS
 5329      instead of the special (and badly supported) LIBKRB5.  LIBKRB5 is
 5330      removed entirely.
 5331      [Richard Levitte]
 5332 
 5333   *) The hw_ncipher.c engine requires dynamic locks.  Unfortunately, it
 5334      seems that in spite of existing for more than a year, many application
 5335      author have done nothing to provide the necessary callbacks, which
 5336      means that this particular engine will not work properly anywhere.
 5337      This is a very unfortunate situation which forces us, in the name
 5338      of usability, to give the hw_ncipher.c a static lock, which is part
 5339      of libcrypto.
 5340      NOTE: This is for the 0.9.7 series ONLY.  This hack will never
 5341      appear in 0.9.8 or later.  We EXPECT application authors to have
 5342      dealt properly with this when 0.9.8 is released (unless we actually
 5343      make such changes in the libcrypto locking code that changes will
 5344      have to be made anyway).
 5345      [Richard Levitte]
 5346 
 5347   *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
 5348      octets have been read, EOF or an error occurs. Without this change
 5349      some truncated ASN1 structures will not produce an error.
 5350      [Steve Henson]
 5351 
 5352   *) Disable Heimdal support, since it hasn't been fully implemented.
 5353      Still give the possibility to force the use of Heimdal, but with
 5354      warnings and a request that patches get sent to openssl-dev.
 5355      [Richard Levitte]
 5356 
 5357   *) Add the VC-CE target, introduce the WINCE sysname, and add
 5358      INSTALL.WCE and appropriate conditionals to make it build.
 5359      [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
 5360 
 5361   *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
 5362      cygssl-x.y.z.dll, where x, y and z are the major, minor and
 5363      edit numbers of the version.
 5364      [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
 5365 
 5366   *) Introduce safe string copy and catenation functions
 5367      (BUF_strlcpy() and BUF_strlcat()).
 5368      [Ben Laurie (CHATS) and Richard Levitte]
 5369 
 5370   *) Avoid using fixed-size buffers for one-line DNs.
 5371      [Ben Laurie (CHATS)]
 5372 
 5373   *) Add BUF_MEM_grow_clean() to avoid information leakage when
 5374      resizing buffers containing secrets, and use where appropriate.
 5375      [Ben Laurie (CHATS)]
 5376 
 5377   *) Avoid using fixed size buffers for configuration file location.
 5378      [Ben Laurie (CHATS)]
 5379 
 5380   *) Avoid filename truncation for various CA files.
 5381      [Ben Laurie (CHATS)]
 5382 
 5383   *) Use sizeof in preference to magic numbers.
 5384      [Ben Laurie (CHATS)]
 5385 
 5386   *) Avoid filename truncation in cert requests.
 5387      [Ben Laurie (CHATS)]
 5388 
 5389   *) Add assertions to check for (supposedly impossible) buffer
 5390      overflows.
 5391      [Ben Laurie (CHATS)]
 5392 
 5393   *) Don't cache truncated DNS entries in the local cache (this could
 5394      potentially lead to a spoofing attack).
 5395      [Ben Laurie (CHATS)]
 5396 
 5397   *) Fix various buffers to be large enough for hex/decimal
 5398      representations in a platform independent manner.
 5399      [Ben Laurie (CHATS)]
 5400 
 5401   *) Add CRYPTO_realloc_clean() to avoid information leakage when
 5402      resizing buffers containing secrets, and use where appropriate.
 5403      [Ben Laurie (CHATS)]
 5404 
 5405   *) Add BIO_indent() to avoid much slightly worrying code to do
 5406      indents.
 5407      [Ben Laurie (CHATS)]
 5408 
 5409   *) Convert sprintf()/BIO_puts() to BIO_printf().
 5410      [Ben Laurie (CHATS)]
 5411 
 5412   *) buffer_gets() could terminate with the buffer only half
 5413      full. Fixed.
 5414      [Ben Laurie (CHATS)]
 5415 
 5416   *) Add assertions to prevent user-supplied crypto functions from
 5417      overflowing internal buffers by having large block sizes, etc.
 5418      [Ben Laurie (CHATS)]
 5419 
 5420   *) New OPENSSL_assert() macro (similar to assert(), but enabled
 5421      unconditionally).
 5422      [Ben Laurie (CHATS)]
 5423 
 5424   *) Eliminate unused copy of key in RC4.
 5425      [Ben Laurie (CHATS)]
 5426 
 5427   *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
 5428      [Ben Laurie (CHATS)]
 5429 
 5430   *) Fix off-by-one error in EGD path.
 5431      [Ben Laurie (CHATS)]
 5432 
 5433   *) If RANDFILE path is too long, ignore instead of truncating.
 5434      [Ben Laurie (CHATS)]
 5435 
 5436   *) Eliminate unused and incorrectly sized X.509 structure
 5437      CBCParameter.
 5438      [Ben Laurie (CHATS)]
 5439 
 5440   *) Eliminate unused and dangerous function knumber().
 5441      [Ben Laurie (CHATS)]
 5442 
 5443   *) Eliminate unused and dangerous structure, KSSL_ERR.
 5444      [Ben Laurie (CHATS)]
 5445 
 5446   *) Protect against overlong session ID context length in an encoded
 5447      session object. Since these are local, this does not appear to be
 5448      exploitable.
 5449      [Ben Laurie (CHATS)]
 5450 
 5451   *) Change from security patch (see 0.9.6e below) that did not affect
 5452      the 0.9.6 release series:
 5453 
 5454      Remote buffer overflow in SSL3 protocol - an attacker could
 5455      supply an oversized master key in Kerberos-enabled versions.
 5456      (CVE-2002-0657)
 5457      [Ben Laurie (CHATS)]
 5458 
 5459   *) Change the SSL kerb5 codes to match RFC 2712.
 5460      [Richard Levitte]
 5461 
 5462   *) Make -nameopt work fully for req and add -reqopt switch.
 5463      [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
 5464 
 5465   *) The "block size" for block ciphers in CFB and OFB mode should be 1.
 5466      [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
 5467 
 5468   *) Make sure tests can be performed even if the corresponding algorithms
 5469      have been removed entirely.  This was also the last step to make
 5470      OpenSSL compilable with DJGPP under all reasonable conditions.
 5471      [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
 5472 
 5473   *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
 5474      to allow version independent disabling of normally unselected ciphers,
 5475      which may be activated as a side-effect of selecting a single cipher.
 5476 
 5477      (E.g., cipher list string "RSA" enables ciphersuites that are left
 5478      out of "ALL" because they do not provide symmetric encryption.
 5479      "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
 5480      [Lutz Jaenicke, Bodo Moeller]
 5481 
 5482   *) Add appropriate support for separate platform-dependent build
 5483      directories.  The recommended way to make a platform-dependent
 5484      build directory is the following (tested on Linux), maybe with
 5485      some local tweaks:
 5486 
 5487 	# Place yourself outside of the OpenSSL source tree.  In
 5488 	# this example, the environment variable OPENSSL_SOURCE
 5489 	# is assumed to contain the absolute OpenSSL source directory.
 5490 	mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
 5491 	cd objtree/"`uname -s`-`uname -r`-`uname -m`"
 5492 	(cd $OPENSSL_SOURCE; find . -type f) | while read F; do
 5493 		mkdir -p `dirname $F`
 5494 		ln -s $OPENSSL_SOURCE/$F $F
 5495 	done
 5496 
 5497      To be absolutely sure not to disturb the source tree, a "make clean"
 5498      is a good thing.  If it isn't successfull, don't worry about it,
 5499      it probably means the source directory is very clean.
 5500      [Richard Levitte]
 5501 
 5502   *) Make sure any ENGINE control commands make local copies of string
 5503      pointers passed to them whenever necessary. Otherwise it is possible
 5504      the caller may have overwritten (or deallocated) the original string
 5505      data when a later ENGINE operation tries to use the stored values.
 5506      [Götz Babin-Ebell <babinebell@trustcenter.de>]
 5507 
 5508   *) Improve diagnostics in file reading and command-line digests.
 5509      [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
 5510 
 5511   *) Add AES modes CFB and OFB to the object database.  Correct an
 5512      error in AES-CFB decryption.
 5513      [Richard Levitte]
 5514 
 5515   *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this 
 5516      allows existing EVP_CIPHER_CTX structures to be reused after
 5517      calling EVP_*Final(). This behaviour is used by encryption
 5518      BIOs and some applications. This has the side effect that
 5519      applications must explicitly clean up cipher contexts with
 5520      EVP_CIPHER_CTX_cleanup() or they will leak memory.
 5521      [Steve Henson]
 5522 
 5523   *) Check the values of dna and dnb in bn_mul_recursive before calling
 5524      bn_mul_comba (a non zero value means the a or b arrays do not contain
 5525      n2 elements) and fallback to bn_mul_normal if either is not zero.
 5526      [Steve Henson]
 5527 
 5528   *) Fix escaping of non-ASCII characters when using the -subj option
 5529      of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
 5530      [Lutz Jaenicke]
 5531 
 5532   *) Make object definitions compliant to LDAP (RFC2256): SN is the short
 5533      form for "surname", serialNumber has no short form.
 5534      Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
 5535      therefore remove "mail" short name for "internet 7".
 5536      The OID for unique identifiers in X509 certificates is
 5537      x500UniqueIdentifier, not uniqueIdentifier.
 5538      Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
 5539      [Lutz Jaenicke]
 5540 
 5541   *) Add an "init" command to the ENGINE config module and auto initialize
 5542      ENGINEs. Without any "init" command the ENGINE will be initialized 
 5543      after all ctrl commands have been executed on it. If init=1 the 
 5544      ENGINE is initailized at that point (ctrls before that point are run
 5545      on the uninitialized ENGINE and after on the initialized one). If
 5546      init=0 then the ENGINE will not be iniatialized at all.
 5547      [Steve Henson]
 5548 
 5549   *) Fix the 'app_verify_callback' interface so that the user-defined
 5550      argument is actually passed to the callback: In the
 5551      SSL_CTX_set_cert_verify_callback() prototype, the callback
 5552      declaration has been changed from
 5553           int (*cb)()
 5554      into
 5555           int (*cb)(X509_STORE_CTX *,void *);
 5556      in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
 5557           i=s->ctx->app_verify_callback(&ctx)
 5558      has been changed into
 5559           i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
 5560 
 5561      To update applications using SSL_CTX_set_cert_verify_callback(),
 5562      a dummy argument can be added to their callback functions.
 5563      [D. K. Smetters <smetters@parc.xerox.com>]
 5564 
 5565   *) Added the '4758cca' ENGINE to support IBM 4758 cards.
 5566      [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
 5567 
 5568   *) Add and OPENSSL_LOAD_CONF define which will cause
 5569      OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
 5570      This allows older applications to transparently support certain
 5571      OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
 5572      Two new functions OPENSSL_add_all_algorithms_noconf() which will never
 5573      load the config file and OPENSSL_add_all_algorithms_conf() which will
 5574      always load it have also been added.
 5575      [Steve Henson]
 5576 
 5577   *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
 5578      Adjust NIDs and EVP layer.
 5579      [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
 5580 
 5581   *) Config modules support in openssl utility.
 5582 
 5583      Most commands now load modules from the config file,
 5584      though in a few (such as version) this isn't done 
 5585      because it couldn't be used for anything.
 5586 
 5587      In the case of ca and req the config file used is
 5588      the same as the utility itself: that is the -config
 5589      command line option can be used to specify an
 5590      alternative file.
 5591      [Steve Henson]
 5592 
 5593   *) Move default behaviour from OPENSSL_config(). If appname is NULL
 5594      use "openssl_conf" if filename is NULL use default openssl config file.
 5595      [Steve Henson]
 5596 
 5597   *) Add an argument to OPENSSL_config() to allow the use of an alternative
 5598      config section name. Add a new flag to tolerate a missing config file
 5599      and move code to CONF_modules_load_file().
 5600      [Steve Henson]
 5601 
 5602   *) Support for crypto accelerator cards from Accelerated Encryption
 5603      Processing, www.aep.ie.  (Use engine 'aep')
 5604      The support was copied from 0.9.6c [engine] and adapted/corrected
 5605      to work with the new engine framework.
 5606      [AEP Inc. and Richard Levitte]
 5607 
 5608   *) Support for SureWare crypto accelerator cards from Baltimore
 5609      Technologies.  (Use engine 'sureware')
 5610      The support was copied from 0.9.6c [engine] and adapted
 5611      to work with the new engine framework.
 5612      [Richard Levitte]
 5613 
 5614   *) Have the CHIL engine fork-safe (as defined by nCipher) and actually
 5615      make the newer ENGINE framework commands for the CHIL engine work.
 5616      [Toomas Kiisk <vix@cyber.ee> and Richard Levitte]
 5617 
 5618   *) Make it possible to produce shared libraries on ReliantUNIX.
 5619      [Robert Dahlem <Robert.Dahlem@ffm2.siemens.de> via Richard Levitte]
 5620 
 5621   *) Add the configuration target debug-linux-ppro.
 5622      Make 'openssl rsa' use the general key loading routines
 5623      implemented in apps.c, and make those routines able to
 5624      handle the key format FORMAT_NETSCAPE and the variant
 5625      FORMAT_IISSGC.
 5626      [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
 5627 
 5628  *) Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
 5629      [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
 5630 
 5631   *) Add -keyform to rsautl, and document -engine.
 5632      [Richard Levitte, inspired by Toomas Kiisk <vix@cyber.ee>]
 5633 
 5634   *) Change BIO_new_file (crypto/bio/bss_file.c) to use new
 5635      BIO_R_NO_SUCH_FILE error code rather than the generic
 5636      ERR_R_SYS_LIB error code if fopen() fails with ENOENT.
 5637      [Ben Laurie]
 5638 
 5639   *) Add new functions
 5640           ERR_peek_last_error
 5641           ERR_peek_last_error_line
 5642           ERR_peek_last_error_line_data.
 5643      These are similar to
 5644           ERR_peek_error
 5645           ERR_peek_error_line
 5646           ERR_peek_error_line_data,
 5647      but report on the latest error recorded rather than the first one
 5648      still in the error queue.
 5649      [Ben Laurie, Bodo Moeller]
 5650         
 5651   *) default_algorithms option in ENGINE config module. This allows things
 5652      like:
 5653      default_algorithms = ALL
 5654      default_algorithms = RSA, DSA, RAND, CIPHERS, DIGESTS
 5655      [Steve Henson]
 5656 
 5657   *) Prelminary ENGINE config module.
 5658      [Steve Henson]
 5659 
 5660   *) New experimental application configuration code.
 5661      [Steve Henson]
 5662 
 5663   *) Change the AES code to follow the same name structure as all other
 5664      symmetric ciphers, and behave the same way.  Move everything to
 5665      the directory crypto/aes, thereby obsoleting crypto/rijndael.
 5666      [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
 5667 
 5668   *) SECURITY: remove unsafe setjmp/signal interaction from ui_openssl.c.
 5669      [Ben Laurie and Theo de Raadt]
 5670 
 5671   *) Add option to output public keys in req command.
 5672      [Massimiliano Pala madwolf@openca.org]
 5673 
 5674   *) Use wNAFs in EC_POINTs_mul() for improved efficiency
 5675      (up to about 10% better than before for P-192 and P-224).
 5676      [Bodo Moeller]
 5677 
 5678   *) New functions/macros
 5679 
 5680           SSL_CTX_set_msg_callback(ctx, cb)
 5681           SSL_CTX_set_msg_callback_arg(ctx, arg)
 5682           SSL_set_msg_callback(ssl, cb)
 5683           SSL_set_msg_callback_arg(ssl, arg)
 5684 
 5685      to request calling a callback function
 5686 
 5687           void cb(int write_p, int version, int content_type,
 5688                   const void *buf, size_t len, SSL *ssl, void *arg)
 5689 
 5690      whenever a protocol message has been completely received
 5691      (write_p == 0) or sent (write_p == 1).  Here 'version' is the
 5692      protocol version  according to which the SSL library interprets
 5693      the current protocol message (SSL2_VERSION, SSL3_VERSION, or
 5694      TLS1_VERSION).  'content_type' is 0 in the case of SSL 2.0, or
 5695      the content type as defined in the SSL 3.0/TLS 1.0 protocol
 5696      specification (change_cipher_spec(20), alert(21), handshake(22)).
 5697      'buf' and 'len' point to the actual message, 'ssl' to the
 5698      SSL object, and 'arg' is the application-defined value set by
 5699      SSL[_CTX]_set_msg_callback_arg().
 5700 
 5701      'openssl s_client' and 'openssl s_server' have new '-msg' options
 5702      to enable a callback that displays all protocol messages.
 5703      [Bodo Moeller]
 5704 
 5705   *) Change the shared library support so shared libraries are built as
 5706      soon as the corresponding static library is finished, and thereby get
 5707      openssl and the test programs linked against the shared library.
 5708      This still only happens when the keyword "shard" has been given to
 5709      the configuration scripts.
 5710 
 5711      NOTE: shared library support is still an experimental thing, and
 5712      backward binary compatibility is still not guaranteed.
 5713      ["Maciej W. Rozycki" <macro@ds2.pg.gda.pl> and Richard Levitte]
 5714 
 5715   *) Add support for Subject Information Access extension.
 5716      [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
 5717 
 5718   *) Make BUF_MEM_grow() behaviour more consistent: Initialise to zero
 5719      additional bytes when new memory had to be allocated, not just
 5720      when reusing an existing buffer.
 5721      [Bodo Moeller]
 5722 
 5723   *) New command line and configuration option 'utf8' for the req command.
 5724      This allows field values to be specified as UTF8 strings.
 5725      [Steve Henson]
 5726 
 5727   *) Add -multi and -mr options to "openssl speed" - giving multiple parallel
 5728      runs for the former and machine-readable output for the latter.
 5729      [Ben Laurie]
 5730 
 5731   *) Add '-noemailDN' option to 'openssl ca'.  This prevents inclusion
 5732      of the e-mail address in the DN (i.e., it will go into a certificate
 5733      extension only).  The new configuration file option 'email_in_dn = no'
 5734      has the same effect.
 5735      [Massimiliano Pala madwolf@openca.org]
 5736 
 5737   *) Change all functions with names starting with des_ to be starting
 5738      with DES_ instead.  Add wrappers that are compatible with libdes,
 5739      but are named _ossl_old_des_*.  Finally, add macros that map the
 5740      des_* symbols to the corresponding _ossl_old_des_* if libdes
 5741      compatibility is desired.  If OpenSSL 0.9.6c compatibility is
 5742      desired, the des_* symbols will be mapped to DES_*, with one
 5743      exception.
 5744 
 5745      Since we provide two compatibility mappings, the user needs to
 5746      define the macro OPENSSL_DES_LIBDES_COMPATIBILITY if libdes
 5747      compatibility is desired.  The default (i.e., when that macro
 5748      isn't defined) is OpenSSL 0.9.6c compatibility.
 5749 
 5750      There are also macros that enable and disable the support of old
 5751      des functions altogether.  Those are OPENSSL_ENABLE_OLD_DES_SUPPORT
 5752      and OPENSSL_DISABLE_OLD_DES_SUPPORT.  If none or both of those
 5753      are defined, the default will apply: to support the old des routines.
 5754 
 5755      In either case, one must include openssl/des.h to get the correct
 5756      definitions.  Do not try to just include openssl/des_old.h, that
 5757      won't work.
 5758 
 5759      NOTE: This is a major break of an old API into a new one.  Software
 5760      authors are encouraged to switch to the DES_ style functions.  Some
 5761      time in the future, des_old.h and the libdes compatibility functions
 5762      will be disable (i.e. OPENSSL_DISABLE_OLD_DES_SUPPORT will be the
 5763      default), and then completely removed.
 5764      [Richard Levitte]
 5765 
 5766   *) Test for certificates which contain unsupported critical extensions.
 5767      If such a certificate is found during a verify operation it is 
 5768      rejected by default: this behaviour can be overridden by either
 5769      handling the new error X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION or
 5770      by setting the verify flag X509_V_FLAG_IGNORE_CRITICAL. A new function
 5771      X509_supported_extension() has also been added which returns 1 if a
 5772      particular extension is supported.
 5773      [Steve Henson]
 5774 
 5775   *) Modify the behaviour of EVP cipher functions in similar way to digests
 5776      to retain compatibility with existing code.
 5777      [Steve Henson]
 5778 
 5779   *) Modify the behaviour of EVP_DigestInit() and EVP_DigestFinal() to retain
 5780      compatibility with existing code. In particular the 'ctx' parameter does
 5781      not have to be to be initialized before the call to EVP_DigestInit() and
 5782      it is tidied up after a call to EVP_DigestFinal(). New function
 5783      EVP_DigestFinal_ex() which does not tidy up the ctx. Similarly function
 5784      EVP_MD_CTX_copy() changed to not require the destination to be
 5785      initialized valid and new function EVP_MD_CTX_copy_ex() added which
 5786      requires the destination to be valid.
 5787 
 5788      Modify all the OpenSSL digest calls to use EVP_DigestInit_ex(),
 5789      EVP_DigestFinal_ex() and EVP_MD_CTX_copy_ex().
 5790      [Steve Henson]
 5791 
 5792   *) Change ssl3_get_message (ssl/s3_both.c) and the functions using it
 5793      so that complete 'Handshake' protocol structures are kept in memory
 5794      instead of overwriting 'msg_type' and 'length' with 'body' data.
 5795      [Bodo Moeller]
 5796 
 5797   *) Add an implementation of SSL_add_dir_cert_subjects_to_stack for Win32.
 5798      [Massimo Santin via Richard Levitte]
 5799 
 5800   *) Major restructuring to the underlying ENGINE code. This includes
 5801      reduction of linker bloat, separation of pure "ENGINE" manipulation
 5802      (initialisation, etc) from functionality dealing with implementations
 5803      of specific crypto iterfaces. This change also introduces integrated
 5804      support for symmetric ciphers and digest implementations - so ENGINEs
 5805      can now accelerate these by providing EVP_CIPHER and EVP_MD
 5806      implementations of their own. This is detailed in crypto/engine/README
 5807      as it couldn't be adequately described here. However, there are a few
 5808      API changes worth noting - some RSA, DSA, DH, and RAND functions that
 5809      were changed in the original introduction of ENGINE code have now
 5810      reverted back - the hooking from this code to ENGINE is now a good
 5811      deal more passive and at run-time, operations deal directly with
 5812      RSA_METHODs, DSA_METHODs (etc) as they did before, rather than
 5813      dereferencing through an ENGINE pointer any more. Also, the ENGINE
 5814      functions dealing with BN_MOD_EXP[_CRT] handlers have been removed -
 5815      they were not being used by the framework as there is no concept of a
 5816      BIGNUM_METHOD and they could not be generalised to the new
 5817      'ENGINE_TABLE' mechanism that underlies the new code. Similarly,
 5818      ENGINE_cpy() has been removed as it cannot be consistently defined in
 5819      the new code.
 5820      [Geoff Thorpe]
 5821 
 5822   *) Change ASN1_GENERALIZEDTIME_check() to allow fractional seconds.
 5823      [Steve Henson]
 5824 
 5825   *) Change mkdef.pl to sort symbols that get the same entry number,
 5826      and make sure the automatically generated functions ERR_load_*
 5827      become part of libeay.num as well.
 5828      [Richard Levitte]
 5829 
 5830   *) New function SSL_renegotiate_pending().  This returns true once
 5831      renegotiation has been requested (either SSL_renegotiate() call
 5832      or HelloRequest/ClientHello receveived from the peer) and becomes
 5833      false once a handshake has been completed.
 5834      (For servers, SSL_renegotiate() followed by SSL_do_handshake()
 5835      sends a HelloRequest, but does not ensure that a handshake takes
 5836      place.  SSL_renegotiate_pending() is useful for checking if the
 5837      client has followed the request.)
 5838      [Bodo Moeller]
 5839 
 5840   *) New SSL option SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION.
 5841      By default, clients may request session resumption even during
 5842      renegotiation (if session ID contexts permit); with this option,
 5843      session resumption is possible only in the first handshake.
 5844 
 5845      SSL_OP_ALL is now 0x00000FFFL instead of 0x000FFFFFL.  This makes
 5846      more bits available for options that should not be part of
 5847      SSL_OP_ALL (such as SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION).
 5848      [Bodo Moeller]
 5849 
 5850   *) Add some demos for certificate and certificate request creation.
 5851      [Steve Henson]
 5852 
 5853   *) Make maximum certificate chain size accepted from the peer application
 5854      settable (SSL*_get/set_max_cert_list()), as proposed by
 5855      "Douglas E. Engert" <deengert@anl.gov>.
 5856      [Lutz Jaenicke]
 5857 
 5858   *) Add support for shared libraries for Unixware-7
 5859      (Boyd Lynn Gerber <gerberb@zenez.com>).
 5860      [Lutz Jaenicke]
 5861 
 5862   *) Add a "destroy" handler to ENGINEs that allows structural cleanup to
 5863      be done prior to destruction. Use this to unload error strings from
 5864      ENGINEs that load their own error strings. NB: This adds two new API
 5865      functions to "get" and "set" this destroy handler in an ENGINE.
 5866      [Geoff Thorpe]
 5867 
 5868   *) Alter all existing ENGINE implementations (except "openssl" and
 5869      "openbsd") to dynamically instantiate their own error strings. This
 5870      makes them more flexible to be built both as statically-linked ENGINEs
 5871      and self-contained shared-libraries loadable via the "dynamic" ENGINE.
 5872      Also, add stub code to each that makes building them as self-contained
 5873      shared-libraries easier (see README.ENGINE).
 5874      [Geoff Thorpe]
 5875 
 5876   *) Add a "dynamic" ENGINE that provides a mechanism for binding ENGINE
 5877      implementations into applications that are completely implemented in
 5878      self-contained shared-libraries. The "dynamic" ENGINE exposes control
 5879      commands that can be used to configure what shared-library to load and
 5880      to control aspects of the way it is handled. Also, made an update to
 5881      the README.ENGINE file that brings its information up-to-date and
 5882      provides some information and instructions on the "dynamic" ENGINE
 5883      (ie. how to use it, how to build "dynamic"-loadable ENGINEs, etc).
 5884      [Geoff Thorpe]
 5885 
 5886   *) Make it possible to unload ranges of ERR strings with a new
 5887      "ERR_unload_strings" function.
 5888      [Geoff Thorpe]
 5889 
 5890   *) Add a copy() function to EVP_MD.
 5891      [Ben Laurie]
 5892 
 5893   *) Make EVP_MD routines take a context pointer instead of just the
 5894      md_data void pointer.
 5895      [Ben Laurie]
 5896 
 5897   *) Add flags to EVP_MD and EVP_MD_CTX. EVP_MD_FLAG_ONESHOT indicates
 5898      that the digest can only process a single chunk of data
 5899      (typically because it is provided by a piece of
 5900      hardware). EVP_MD_CTX_FLAG_ONESHOT indicates that the application
 5901      is only going to provide a single chunk of data, and hence the
 5902      framework needn't accumulate the data for oneshot drivers.
 5903      [Ben Laurie]
 5904 
 5905   *) As with "ERR", make it possible to replace the underlying "ex_data"
 5906      functions. This change also alters the storage and management of global
 5907      ex_data state - it's now all inside ex_data.c and all "class" code (eg.
 5908      RSA, BIO, SSL_CTX, etc) no longer stores its own STACKS and per-class
 5909      index counters. The API functions that use this state have been changed
 5910      to take a "class_index" rather than pointers to the class's local STACK
 5911      and counter, and there is now an API function to dynamically create new
 5912      classes. This centralisation allows us to (a) plug a lot of the
 5913      thread-safety problems that existed, and (b) makes it possible to clean
 5914      up all allocated state using "CRYPTO_cleanup_all_ex_data()". W.r.t. (b)
 5915      such data would previously have always leaked in application code and
 5916      workarounds were in place to make the memory debugging turn a blind eye
 5917      to it. Application code that doesn't use this new function will still
 5918      leak as before, but their memory debugging output will announce it now
 5919      rather than letting it slide.
 5920 
 5921      Besides the addition of CRYPTO_cleanup_all_ex_data(), another API change
 5922      induced by the "ex_data" overhaul is that X509_STORE_CTX_init() now
 5923      has a return value to indicate success or failure.
 5924      [Geoff Thorpe]
 5925 
 5926   *) Make it possible to replace the underlying "ERR" functions such that the
 5927      global state (2 LHASH tables and 2 locks) is only used by the "default"
 5928      implementation. This change also adds two functions to "get" and "set"
 5929      the implementation prior to it being automatically set the first time
 5930      any other ERR function takes place. Ie. an application can call "get",
 5931      pass the return value to a module it has just loaded, and that module
 5932      can call its own "set" function using that value. This means the
 5933      module's "ERR" operations will use (and modify) the error state in the
 5934      application and not in its own statically linked copy of OpenSSL code.
 5935      [Geoff Thorpe]
 5936 
 5937   *) Give DH, DSA, and RSA types their own "**_up_ref()" function to increment
 5938      reference counts. This performs normal REF_PRINT/REF_CHECK macros on
 5939      the operation, and provides a more encapsulated way for external code
 5940      (crypto/evp/ and ssl/) to do this. Also changed the evp and ssl code
 5941      to use these functions rather than manually incrementing the counts.
 5942 
 5943      Also rename "DSO_up()" function to more descriptive "DSO_up_ref()".
 5944      [Geoff Thorpe]
 5945 
 5946   *) Add EVP test program.
 5947      [Ben Laurie]
 5948 
 5949   *) Add symmetric cipher support to ENGINE. Expect the API to change!
 5950      [Ben Laurie]
 5951 
 5952   *) New CRL functions: X509_CRL_set_version(), X509_CRL_set_issuer_name()
 5953      X509_CRL_set_lastUpdate(), X509_CRL_set_nextUpdate(), X509_CRL_sort(),
 5954      X509_REVOKED_set_serialNumber(), and X509_REVOKED_set_revocationDate().
 5955      These allow a CRL to be built without having to access X509_CRL fields
 5956      directly. Modify 'ca' application to use new functions.
 5957      [Steve Henson]
 5958 
 5959   *) Move SSL_OP_TLS_ROLLBACK_BUG out of the SSL_OP_ALL list of recommended
 5960      bug workarounds. Rollback attack detection is a security feature.
 5961      The problem will only arise on OpenSSL servers when TLSv1 is not
 5962      available (sslv3_server_method() or SSL_OP_NO_TLSv1).
 5963      Software authors not wanting to support TLSv1 will have special reasons
 5964      for their choice and can explicitly enable this option.
 5965      [Bodo Moeller, Lutz Jaenicke]
 5966 
 5967   *) Rationalise EVP so it can be extended: don't include a union of
 5968      cipher/digest structures, add init/cleanup functions for EVP_MD_CTX
 5969      (similar to those existing for EVP_CIPHER_CTX).
 5970      Usage example:
 5971 
 5972          EVP_MD_CTX md;
 5973 
 5974          EVP_MD_CTX_init(&md);             /* new function call */
 5975          EVP_DigestInit(&md, EVP_sha1());
 5976          EVP_DigestUpdate(&md, in, len);
 5977          EVP_DigestFinal(&md, out, NULL);
 5978          EVP_MD_CTX_cleanup(&md);          /* new function call */
 5979 
 5980      [Ben Laurie]
 5981 
 5982   *) Make DES key schedule conform to the usual scheme, as well as
 5983      correcting its structure. This means that calls to DES functions
 5984      now have to pass a pointer to a des_key_schedule instead of a
 5985      plain des_key_schedule (which was actually always a pointer
 5986      anyway): E.g.,
 5987 
 5988          des_key_schedule ks;
 5989 
 5990 	 des_set_key_checked(..., &ks);
 5991 	 des_ncbc_encrypt(..., &ks, ...);
 5992 
 5993      (Note that a later change renames 'des_...' into 'DES_...'.)
 5994      [Ben Laurie]
 5995 
 5996   *) Initial reduction of linker bloat: the use of some functions, such as
 5997      PEM causes large amounts of unused functions to be linked in due to
 5998      poor organisation. For example pem_all.c contains every PEM function
 5999      which has a knock on effect of linking in large amounts of (unused)
 6000      ASN1 code. Grouping together similar functions and splitting unrelated
 6001      functions prevents this.
 6002      [Steve Henson]
 6003 
 6004   *) Cleanup of EVP macros.
 6005      [Ben Laurie]
 6006 
 6007   *) Change historical references to {NID,SN,LN}_des_ede and ede3 to add the
 6008      correct _ecb suffix.
 6009      [Ben Laurie]
 6010 
 6011   *) Add initial OCSP responder support to ocsp application. The
 6012      revocation information is handled using the text based index
 6013      use by the ca application. The responder can either handle
 6014      requests generated internally, supplied in files (for example
 6015      via a CGI script) or using an internal minimal server.
 6016      [Steve Henson]
 6017 
 6018   *) Add configuration choices to get zlib compression for TLS.
 6019      [Richard Levitte]
 6020 
 6021   *) Changes to Kerberos SSL for RFC 2712 compliance:
 6022      1.  Implemented real KerberosWrapper, instead of just using
 6023          KRB5 AP_REQ message.  [Thanks to Simon Wilkinson <sxw@sxw.org.uk>]
 6024      2.  Implemented optional authenticator field of KerberosWrapper.
 6025 
 6026      Added openssl-style ASN.1 macros for Kerberos ticket, ap_req,
 6027      and authenticator structs; see crypto/krb5/.
 6028 
 6029      Generalized Kerberos calls to support multiple Kerberos libraries.
 6030      [Vern Staats <staatsvr@asc.hpc.mil>,
 6031       Jeffrey Altman <jaltman@columbia.edu>
 6032       via Richard Levitte]
 6033 
 6034   *) Cause 'openssl speed' to use fully hard-coded DSA keys as it
 6035      already does with RSA. testdsa.h now has 'priv_key/pub_key'
 6036      values for each of the key sizes rather than having just
 6037      parameters (and 'speed' generating keys each time).
 6038      [Geoff Thorpe]
 6039 
 6040   *) Speed up EVP routines.
 6041      Before:
 6042 encrypt
 6043 type              8 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
 6044 des-cbc           4408.85k     5560.51k     5778.46k     5862.20k     5825.16k
 6045 des-cbc           4389.55k     5571.17k     5792.23k     5846.91k     5832.11k
 6046 des-cbc           4394.32k     5575.92k     5807.44k     5848.37k     5841.30k
 6047 decrypt
 6048 des-cbc           3482.66k     5069.49k     5496.39k     5614.16k     5639.28k
 6049 des-cbc           3480.74k     5068.76k     5510.34k     5609.87k     5635.52k
 6050 des-cbc           3483.72k     5067.62k     5504.60k     5708.01k     5724.80k
 6051      After:
 6052 encrypt
 6053 des-cbc           4660.16k     5650.19k     5807.19k     5827.13k     5783.32k
 6054 decrypt
 6055 des-cbc           3624.96k     5258.21k     5530.91k     5624.30k     5628.26k
 6056      [Ben Laurie]
 6057 
 6058   *) Added the OS2-EMX target.
 6059      ["Brian Havard" <brianh@kheldar.apana.org.au> and Richard Levitte]
 6060 
 6061   *) Rewrite apps to use NCONF routines instead of the old CONF. New functions
 6062      to support NCONF routines in extension code. New function CONF_set_nconf()
 6063      to allow functions which take an NCONF to also handle the old LHASH
 6064      structure: this means that the old CONF compatible routines can be
 6065      retained (in particular wrt extensions) without having to duplicate the
 6066      code. New function X509V3_add_ext_nconf_sk to add extensions to a stack.
 6067      [Steve Henson]
 6068 
 6069   *) Enhance the general user interface with mechanisms for inner control
 6070      and with possibilities to have yes/no kind of prompts.
 6071      [Richard Levitte]
 6072 
 6073   *) Change all calls to low level digest routines in the library and
 6074      applications to use EVP. Add missing calls to HMAC_cleanup() and
 6075      don't assume HMAC_CTX can be copied using memcpy().
 6076      [Verdon Walker <VWalker@novell.com>, Steve Henson]
 6077 
 6078   *) Add the possibility to control engines through control names but with
 6079      arbitrary arguments instead of just a string.
 6080      Change the key loaders to take a UI_METHOD instead of a callback
 6081      function pointer.  NOTE: this breaks binary compatibility with earlier
 6082      versions of OpenSSL [engine].
 6083      Adapt the nCipher code for these new conditions and add a card insertion
 6084      callback.
 6085      [Richard Levitte]
 6086 
 6087   *) Enhance the general user interface with mechanisms to better support
 6088      dialog box interfaces, application-defined prompts, the possibility
 6089      to use defaults (for example default passwords from somewhere else)
 6090      and interrupts/cancellations.
 6091      [Richard Levitte]
 6092 
 6093   *) Tidy up PKCS#12 attribute handling. Add support for the CSP name
 6094      attribute in PKCS#12 files, add new -CSP option to pkcs12 utility.
 6095      [Steve Henson]
 6096 
 6097   *) Fix a memory leak in 'sk_dup()' in the case reallocation fails. (Also
 6098      tidy up some unnecessarily weird code in 'sk_new()').
 6099      [Geoff, reported by Diego Tartara <dtartara@novamens.com>]
 6100 
 6101   *) Change the key loading routines for ENGINEs to use the same kind
 6102      callback (pem_password_cb) as all other routines that need this
 6103      kind of callback.
 6104      [Richard Levitte]
 6105 
 6106   *) Increase ENTROPY_NEEDED to 32 bytes, as Rijndael can operate with
 6107      256 bit (=32 byte) keys. Of course seeding with more entropy bytes
 6108      than this minimum value is recommended.
 6109      [Lutz Jaenicke]
 6110 
 6111   *) New random seeder for OpenVMS, using the system process statistics
 6112      that are easily reachable.
 6113      [Richard Levitte]
 6114 
 6115   *) Windows apparently can't transparently handle global
 6116      variables defined in DLLs. Initialisations such as:
 6117 
 6118         const ASN1_ITEM *it = &ASN1_INTEGER_it;
 6119 
 6120      wont compile. This is used by the any applications that need to
 6121      declare their own ASN1 modules. This was fixed by adding the option
 6122      EXPORT_VAR_AS_FN to all Win32 platforms, although this isn't strictly
 6123      needed for static libraries under Win32.
 6124      [Steve Henson]
 6125 
 6126   *) New functions X509_PURPOSE_set() and X509_TRUST_set() to handle
 6127      setting of purpose and trust fields. New X509_STORE trust and
 6128      purpose functions and tidy up setting in other SSL functions.
 6129      [Steve Henson]
 6130 
 6131   *) Add copies of X509_STORE_CTX fields and callbacks to X509_STORE
 6132      structure. These are inherited by X509_STORE_CTX when it is 
 6133      initialised. This allows various defaults to be set in the
 6134      X509_STORE structure (such as flags for CRL checking and custom
 6135      purpose or trust settings) for functions which only use X509_STORE_CTX
 6136      internally such as S/MIME.
 6137 
 6138      Modify X509_STORE_CTX_purpose_inherit() so it only sets purposes and
 6139      trust settings if they are not set in X509_STORE. This allows X509_STORE
 6140      purposes and trust (in S/MIME for example) to override any set by default.
 6141 
 6142      Add command line options for CRL checking to smime, s_client and s_server
 6143      applications.
 6144      [Steve Henson]
 6145 
 6146   *) Initial CRL based revocation checking. If the CRL checking flag(s)
 6147      are set then the CRL is looked up in the X509_STORE structure and
 6148      its validity and signature checked, then if the certificate is found
 6149      in the CRL the verify fails with a revoked error.
 6150 
 6151      Various new CRL related callbacks added to X509_STORE_CTX structure.
 6152 
 6153      Command line options added to 'verify' application to support this.
 6154 
 6155      This needs some additional work, such as being able to handle multiple
 6156      CRLs with different times, extension based lookup (rather than just
 6157      by subject name) and ultimately more complete V2 CRL extension
 6158      handling.
 6159      [Steve Henson]
 6160 
 6161   *) Add a general user interface API (crypto/ui/).  This is designed
 6162      to replace things like des_read_password and friends (backward
 6163      compatibility functions using this new API are provided).
 6164      The purpose is to remove prompting functions from the DES code
 6165      section as well as provide for prompting through dialog boxes in
 6166      a window system and the like.
 6167      [Richard Levitte]
 6168 
 6169   *) Add "ex_data" support to ENGINE so implementations can add state at a
 6170      per-structure level rather than having to store it globally.
 6171      [Geoff]
 6172 
 6173   *) Make it possible for ENGINE structures to be copied when retrieved by
 6174      ENGINE_by_id() if the ENGINE specifies a new flag: ENGINE_FLAGS_BY_ID_COPY.
 6175      This causes the "original" ENGINE structure to act like a template,
 6176      analogous to the RSA vs. RSA_METHOD type of separation. Because of this
 6177      operational state can be localised to each ENGINE structure, despite the
 6178      fact they all share the same "methods". New ENGINE structures returned in
 6179      this case have no functional references and the return value is the single
 6180      structural reference. This matches the single structural reference returned
 6181      by ENGINE_by_id() normally, when it is incremented on the pre-existing
 6182      ENGINE structure.
 6183      [Geoff]
 6184 
 6185   *) Fix ASN1 decoder when decoding type ANY and V_ASN1_OTHER: since this
 6186      needs to match any other type at all we need to manually clear the
 6187      tag cache.
 6188      [Steve Henson]
 6189 
 6190   *) Changes to the "openssl engine" utility to include;
 6191      - verbosity levels ('-v', '-vv', and '-vvv') that provide information
 6192        about an ENGINE's available control commands.
 6193      - executing control commands from command line arguments using the
 6194        '-pre' and '-post' switches. '-post' is only used if '-t' is
 6195        specified and the ENGINE is successfully initialised. The syntax for
 6196        the individual commands are colon-separated, for example;
 6197 	 openssl engine chil -pre FORK_CHECK:0 -pre SO_PATH:/lib/test.so
 6198      [Geoff]
 6199 
 6200   *) New dynamic control command support for ENGINEs. ENGINEs can now
 6201      declare their own commands (numbers), names (strings), descriptions,
 6202      and input types for run-time discovery by calling applications. A
 6203      subset of these commands are implicitly classed as "executable"
 6204      depending on their input type, and only these can be invoked through
 6205      the new string-based API function ENGINE_ctrl_cmd_string(). (Eg. this
 6206      can be based on user input, config files, etc). The distinction is
 6207      that "executable" commands cannot return anything other than a boolean
 6208      result and can only support numeric or string input, whereas some
 6209      discoverable commands may only be for direct use through
 6210      ENGINE_ctrl(), eg. supporting the exchange of binary data, function
 6211      pointers, or other custom uses. The "executable" commands are to
 6212      support parameterisations of ENGINE behaviour that can be
 6213      unambiguously defined by ENGINEs and used consistently across any
 6214      OpenSSL-based application. Commands have been added to all the
 6215      existing hardware-supporting ENGINEs, noticeably "SO_PATH" to allow
 6216      control over shared-library paths without source code alterations.
 6217      [Geoff]
 6218 
 6219   *) Changed all ENGINE implementations to dynamically allocate their
 6220      ENGINEs rather than declaring them statically. Apart from this being
 6221      necessary with the removal of the ENGINE_FLAGS_MALLOCED distinction,
 6222      this also allows the implementations to compile without using the
 6223      internal engine_int.h header.
 6224      [Geoff]
 6225 
 6226   *) Minor adjustment to "rand" code. RAND_get_rand_method() now returns a
 6227      'const' value. Any code that should be able to modify a RAND_METHOD
 6228      should already have non-const pointers to it (ie. they should only
 6229      modify their own ones).
 6230      [Geoff]
 6231 
 6232   *) Made a variety of little tweaks to the ENGINE code.
 6233      - "atalla" and "ubsec" string definitions were moved from header files
 6234        to C code. "nuron" string definitions were placed in variables
 6235        rather than hard-coded - allowing parameterisation of these values
 6236        later on via ctrl() commands.
 6237      - Removed unused "#if 0"'d code.
 6238      - Fixed engine list iteration code so it uses ENGINE_free() to release
 6239        structural references.
 6240      - Constified the RAND_METHOD element of ENGINE structures.
 6241      - Constified various get/set functions as appropriate and added
 6242        missing functions (including a catch-all ENGINE_cpy that duplicates
 6243        all ENGINE values onto a new ENGINE except reference counts/state).
 6244      - Removed NULL parameter checks in get/set functions. Setting a method
 6245        or function to NULL is a way of cancelling out a previously set
 6246        value.  Passing a NULL ENGINE parameter is just plain stupid anyway
 6247        and doesn't justify the extra error symbols and code.
 6248      - Deprecate the ENGINE_FLAGS_MALLOCED define and move the area for
 6249        flags from engine_int.h to engine.h.
 6250      - Changed prototypes for ENGINE handler functions (init(), finish(),
 6251        ctrl(), key-load functions, etc) to take an (ENGINE*) parameter.
 6252      [Geoff]
 6253 
 6254   *) Implement binary inversion algorithm for BN_mod_inverse in addition
 6255      to the algorithm using long division.  The binary algorithm can be
 6256      used only if the modulus is odd.  On 32-bit systems, it is faster
 6257      only for relatively small moduli (roughly 20-30% for 128-bit moduli,
 6258      roughly 5-15% for 256-bit moduli), so we use it only for moduli
 6259      up to 450 bits.  In 64-bit environments, the binary algorithm
 6260      appears to be advantageous for much longer moduli; here we use it
 6261      for moduli up to 2048 bits.
 6262      [Bodo Moeller]
 6263 
 6264   *) Rewrite CHOICE field setting in ASN1_item_ex_d2i(). The old code
 6265      could not support the combine flag in choice fields.
 6266      [Steve Henson]
 6267 
 6268   *) Add a 'copy_extensions' option to the 'ca' utility. This copies
 6269      extensions from a certificate request to the certificate.
 6270      [Steve Henson]
 6271 
 6272   *) Allow multiple 'certopt' and 'nameopt' options to be separated
 6273      by commas. Add 'namopt' and 'certopt' options to the 'ca' config
 6274      file: this allows the display of the certificate about to be
 6275      signed to be customised, to allow certain fields to be included
 6276      or excluded and extension details. The old system didn't display
 6277      multicharacter strings properly, omitted fields not in the policy
 6278      and couldn't display additional details such as extensions.
 6279      [Steve Henson]
 6280 
 6281   *) Function EC_POINTs_mul for multiple scalar multiplication
 6282      of an arbitrary number of elliptic curve points
 6283           \sum scalars[i]*points[i],
 6284      optionally including the generator defined for the EC_GROUP:
 6285           scalar*generator +  \sum scalars[i]*points[i].
 6286 
 6287      EC_POINT_mul is a simple wrapper function for the typical case
 6288      that the point list has just one item (besides the optional
 6289      generator).
 6290      [Bodo Moeller]
 6291 
 6292   *) First EC_METHODs for curves over GF(p):
 6293 
 6294      EC_GFp_simple_method() uses the basic BN_mod_mul and BN_mod_sqr
 6295      operations and provides various method functions that can also
 6296      operate with faster implementations of modular arithmetic.     
 6297 
 6298      EC_GFp_mont_method() reuses most functions that are part of
 6299      EC_GFp_simple_method, but uses Montgomery arithmetic.
 6300 
 6301      [Bodo Moeller; point addition and point doubling
 6302      implementation directly derived from source code provided by
 6303      Lenka Fibikova <fibikova@exp-math.uni-essen.de>]
 6304 
 6305   *) Framework for elliptic curves (crypto/ec/ec.h, crypto/ec/ec_lcl.h,
 6306      crypto/ec/ec_lib.c):
 6307 
 6308      Curves are EC_GROUP objects (with an optional group generator)
 6309      based on EC_METHODs that are built into the library.
 6310 
 6311      Points are EC_POINT objects based on EC_GROUP objects.
 6312 
 6313      Most of the framework would be able to handle curves over arbitrary
 6314      finite fields, but as there are no obvious types for fields other
 6315      than GF(p), some functions are limited to that for now.
 6316      [Bodo Moeller]
 6317 
 6318   *) Add the -HTTP option to s_server.  It is similar to -WWW, but requires
 6319      that the file contains a complete HTTP response.
 6320      [Richard Levitte]
 6321 
 6322   *) Add the ec directory to mkdef.pl and mkfiles.pl. In mkdef.pl
 6323      change the def and num file printf format specifier from "%-40sXXX"
 6324      to "%-39s XXX". The latter will always guarantee a space after the
 6325      field while the former will cause them to run together if the field
 6326      is 40 of more characters long.
 6327      [Steve Henson]
 6328 
 6329   *) Constify the cipher and digest 'method' functions and structures
 6330      and modify related functions to take constant EVP_MD and EVP_CIPHER
 6331      pointers.
 6332      [Steve Henson]
 6333 
 6334   *) Hide BN_CTX structure details in bn_lcl.h instead of publishing them
 6335      in <openssl/bn.h>.  Also further increase BN_CTX_NUM to 32.
 6336      [Bodo Moeller]
 6337 
 6338   *) Modify EVP_Digest*() routines so they now return values. Although the
 6339      internal software routines can never fail additional hardware versions
 6340      might.
 6341      [Steve Henson]
 6342 
 6343   *) Clean up crypto/err/err.h and change some error codes to avoid conflicts:
 6344 
 6345      Previously ERR_R_FATAL was too small and coincided with ERR_LIB_PKCS7
 6346      (= ERR_R_PKCS7_LIB); it is now 64 instead of 32.
 6347 
 6348      ASN1 error codes
 6349           ERR_R_NESTED_ASN1_ERROR
 6350           ...
 6351           ERR_R_MISSING_ASN1_EOS
 6352      were 4 .. 9, conflicting with
 6353           ERR_LIB_RSA (= ERR_R_RSA_LIB)
 6354           ...
 6355           ERR_LIB_PEM (= ERR_R_PEM_LIB).
 6356      They are now 58 .. 63 (i.e., just below ERR_R_FATAL).
 6357 
 6358      Add new error code 'ERR_R_INTERNAL_ERROR'.
 6359      [Bodo Moeller]
 6360 
 6361   *) Don't overuse locks in crypto/err/err.c: For data retrieval, CRYPTO_r_lock
 6362      suffices.
 6363      [Bodo Moeller]
 6364 
 6365   *) New option '-subj arg' for 'openssl req' and 'openssl ca'.  This
 6366      sets the subject name for a new request or supersedes the
 6367      subject name in a given request. Formats that can be parsed are
 6368           'CN=Some Name, OU=myOU, C=IT'
 6369      and
 6370           'CN=Some Name/OU=myOU/C=IT'.
 6371 
 6372      Add options '-batch' and '-verbose' to 'openssl req'.
 6373      [Massimiliano Pala <madwolf@hackmasters.net>]
 6374 
 6375   *) Introduce the possibility to access global variables through
 6376      functions on platform were that's the best way to handle exporting
 6377      global variables in shared libraries.  To enable this functionality,
 6378      one must configure with "EXPORT_VAR_AS_FN" or defined the C macro
 6379      "OPENSSL_EXPORT_VAR_AS_FUNCTION" in crypto/opensslconf.h (the latter
 6380      is normally done by Configure or something similar).
 6381 
 6382      To implement a global variable, use the macro OPENSSL_IMPLEMENT_GLOBAL
 6383      in the source file (foo.c) like this:
 6384 
 6385 	OPENSSL_IMPLEMENT_GLOBAL(int,foo)=1;
 6386 	OPENSSL_IMPLEMENT_GLOBAL(double,bar);
 6387 
 6388      To declare a global variable, use the macros OPENSSL_DECLARE_GLOBAL
 6389      and OPENSSL_GLOBAL_REF in the header file (foo.h) like this:
 6390 
 6391 	OPENSSL_DECLARE_GLOBAL(int,foo);
 6392 	#define foo OPENSSL_GLOBAL_REF(foo)
 6393 	OPENSSL_DECLARE_GLOBAL(double,bar);
 6394 	#define bar OPENSSL_GLOBAL_REF(bar)
 6395 
 6396      The #defines are very important, and therefore so is including the
 6397      header file everywhere where the defined globals are used.
 6398 
 6399      The macro OPENSSL_EXPORT_VAR_AS_FUNCTION also affects the definition
 6400      of ASN.1 items, but that structure is a bit different.
 6401 
 6402      The largest change is in util/mkdef.pl which has been enhanced with
 6403      better and easier to understand logic to choose which symbols should
 6404      go into the Windows .def files as well as a number of fixes and code
 6405      cleanup (among others, algorithm keywords are now sorted
 6406      lexicographically to avoid constant rewrites).
 6407      [Richard Levitte]
 6408 
 6409   *) In BN_div() keep a copy of the sign of 'num' before writing the
 6410      result to 'rm' because if rm==num the value will be overwritten
 6411      and produce the wrong result if 'num' is negative: this caused
 6412      problems with BN_mod() and BN_nnmod().
 6413      [Steve Henson]
 6414 
 6415   *) Function OCSP_request_verify(). This checks the signature on an
 6416      OCSP request and verifies the signer certificate. The signer
 6417      certificate is just checked for a generic purpose and OCSP request
 6418      trust settings.
 6419      [Steve Henson]
 6420 
 6421   *) Add OCSP_check_validity() function to check the validity of OCSP
 6422      responses. OCSP responses are prepared in real time and may only
 6423      be a few seconds old. Simply checking that the current time lies
 6424      between thisUpdate and nextUpdate max reject otherwise valid responses
 6425      caused by either OCSP responder or client clock inaccuracy. Instead
 6426      we allow thisUpdate and nextUpdate to fall within a certain period of
 6427      the current time. The age of the response can also optionally be
 6428      checked. Two new options -validity_period and -status_age added to
 6429      ocsp utility.
 6430      [Steve Henson]
 6431 
 6432   *) If signature or public key algorithm is unrecognized print out its
 6433      OID rather that just UNKNOWN.
 6434      [Steve Henson]
 6435 
 6436   *) Change OCSP_cert_to_id() to tolerate a NULL subject certificate and
 6437      OCSP_cert_id_new() a NULL serialNumber. This allows a partial certificate
 6438      ID to be generated from the issuer certificate alone which can then be
 6439      passed to OCSP_id_issuer_cmp().
 6440      [Steve Henson]
 6441 
 6442   *) New compilation option ASN1_ITEM_FUNCTIONS. This causes the new
 6443      ASN1 modules to export functions returning ASN1_ITEM pointers
 6444      instead of the ASN1_ITEM structures themselves. This adds several
 6445      new macros which allow the underlying ASN1 function/structure to
 6446      be accessed transparently. As a result code should not use ASN1_ITEM
 6447      references directly (such as &X509_it) but instead use the relevant
 6448      macros (such as ASN1_ITEM_rptr(X509)). This option is to allow
 6449      use of the new ASN1 code on platforms where exporting structures
 6450      is problematical (for example in shared libraries) but exporting
 6451      functions returning pointers to structures is not.
 6452      [Steve Henson]
 6453 
 6454   *) Add support for overriding the generation of SSL/TLS session IDs.
 6455      These callbacks can be registered either in an SSL_CTX or per SSL.
 6456      The purpose of this is to allow applications to control, if they wish,
 6457      the arbitrary values chosen for use as session IDs, particularly as it
 6458      can be useful for session caching in multiple-server environments. A
 6459      command-line switch for testing this (and any client code that wishes
 6460      to use such a feature) has been added to "s_server".
 6461      [Geoff Thorpe, Lutz Jaenicke]
 6462 
 6463   *) Modify mkdef.pl to recognise and parse preprocessor conditionals
 6464      of the form '#if defined(...) || defined(...) || ...' and
 6465      '#if !defined(...) && !defined(...) && ...'.  This also avoids
 6466      the growing number of special cases it was previously handling.
 6467      [Richard Levitte]
 6468 
 6469   *) Make all configuration macros available for application by making
 6470      sure they are available in opensslconf.h, by giving them names starting
 6471      with "OPENSSL_" to avoid conflicts with other packages and by making
 6472      sure e_os2.h will cover all platform-specific cases together with
 6473      opensslconf.h.
 6474      Additionally, it is now possible to define configuration/platform-
 6475      specific names (called "system identities").  In the C code, these
 6476      are prefixed with "OPENSSL_SYSNAME_".  e_os2.h will create another
 6477      macro with the name beginning with "OPENSSL_SYS_", which is determined
 6478      from "OPENSSL_SYSNAME_*" or compiler-specific macros depending on
 6479      what is available.
 6480      [Richard Levitte]
 6481 
 6482   *) New option -set_serial to 'req' and 'x509' this allows the serial
 6483      number to use to be specified on the command line. Previously self
 6484      signed certificates were hard coded with serial number 0 and the 
 6485      CA options of 'x509' had to use a serial number in a file which was
 6486      auto incremented.
 6487      [Steve Henson]
 6488 
 6489   *) New options to 'ca' utility to support V2 CRL entry extensions.
 6490      Currently CRL reason, invalidity date and hold instruction are
 6491      supported. Add new CRL extensions to V3 code and some new objects.
 6492      [Steve Henson]
 6493 
 6494   *) New function EVP_CIPHER_CTX_set_padding() this is used to
 6495      disable standard block padding (aka PKCS#5 padding) in the EVP
 6496      API, which was previously mandatory. This means that the data is
 6497      not padded in any way and so the total length much be a multiple
 6498      of the block size, otherwise an error occurs.
 6499      [Steve Henson]
 6500 
 6501   *) Initial (incomplete) OCSP SSL support.
 6502      [Steve Henson]
 6503 
 6504   *) New function OCSP_parse_url(). This splits up a URL into its host,
 6505      port and path components: primarily to parse OCSP URLs. New -url
 6506      option to ocsp utility.
 6507      [Steve Henson]
 6508 
 6509   *) New nonce behavior. The return value of OCSP_check_nonce() now 
 6510      reflects the various checks performed. Applications can decide
 6511      whether to tolerate certain situations such as an absent nonce
 6512      in a response when one was present in a request: the ocsp application
 6513      just prints out a warning. New function OCSP_add1_basic_nonce()
 6514      this is to allow responders to include a nonce in a response even if
 6515      the request is nonce-less.
 6516      [Steve Henson]
 6517 
 6518   *) Disable stdin buffering in load_cert (apps/apps.c) so that no certs are
 6519      skipped when using openssl x509 multiple times on a single input file,
 6520      e.g. "(openssl x509 -out cert1; openssl x509 -out cert2) <certs".
 6521      [Bodo Moeller]
 6522 
 6523   *) Make ASN1_UTCTIME_set_string() and ASN1_GENERALIZEDTIME_set_string()
 6524      set string type: to handle setting ASN1_TIME structures. Fix ca
 6525      utility to correctly initialize revocation date of CRLs.
 6526      [Steve Henson]
 6527 
 6528   *) New option SSL_OP_CIPHER_SERVER_PREFERENCE allows the server to override
 6529      the clients preferred ciphersuites and rather use its own preferences.
 6530      Should help to work around M$ SGC (Server Gated Cryptography) bug in
 6531      Internet Explorer by ensuring unchanged hash method during stepup.
 6532      (Also replaces the broken/deactivated SSL_OP_NON_EXPORT_FIRST option.)
 6533      [Lutz Jaenicke]
 6534 
 6535   *) Make mkdef.pl recognise all DECLARE_ASN1 macros, change rijndael
 6536      to aes and add a new 'exist' option to print out symbols that don't
 6537      appear to exist.
 6538      [Steve Henson]
 6539 
 6540   *) Additional options to ocsp utility to allow flags to be set and
 6541      additional certificates supplied.
 6542      [Steve Henson]
 6543 
 6544   *) Add the option -VAfile to 'openssl ocsp', so the user can give the
 6545      OCSP client a number of certificate to only verify the response
 6546      signature against.
 6547      [Richard Levitte]
 6548 
 6549   *) Update Rijndael code to version 3.0 and change EVP AES ciphers to
 6550      handle the new API. Currently only ECB, CBC modes supported. Add new
 6551      AES OIDs.
 6552 
 6553      Add TLS AES ciphersuites as described in RFC3268, "Advanced
 6554      Encryption Standard (AES) Ciphersuites for Transport Layer
 6555      Security (TLS)".  (In beta versions of OpenSSL 0.9.7, these were
 6556      not enabled by default and were not part of the "ALL" ciphersuite
 6557      alias because they were not yet official; they could be
 6558      explicitly requested by specifying the "AESdraft" ciphersuite
 6559      group alias.  In the final release of OpenSSL 0.9.7, the group
 6560      alias is called "AES" and is part of "ALL".)
 6561      [Ben Laurie, Steve  Henson, Bodo Moeller]
 6562 
 6563   *) New function OCSP_copy_nonce() to copy nonce value (if present) from
 6564      request to response.
 6565      [Steve Henson]
 6566 
 6567   *) Functions for OCSP responders. OCSP_request_onereq_count(),
 6568      OCSP_request_onereq_get0(), OCSP_onereq_get0_id() and OCSP_id_get0_info()
 6569      extract information from a certificate request. OCSP_response_create()
 6570      creates a response and optionally adds a basic response structure.
 6571      OCSP_basic_add1_status() adds a complete single response to a basic
 6572      response and returns the OCSP_SINGLERESP structure just added (to allow
 6573      extensions to be included for example). OCSP_basic_add1_cert() adds a
 6574      certificate to a basic response and OCSP_basic_sign() signs a basic
 6575      response with various flags. New helper functions ASN1_TIME_check()
 6576      (checks validity of ASN1_TIME structure) and ASN1_TIME_to_generalizedtime()
 6577      (converts ASN1_TIME to GeneralizedTime).
 6578      [Steve Henson]
 6579 
 6580   *) Various new functions. EVP_Digest() combines EVP_Digest{Init,Update,Final}()
 6581      in a single operation. X509_get0_pubkey_bitstr() extracts the public_key
 6582      structure from a certificate. X509_pubkey_digest() digests the public_key
 6583      contents: this is used in various key identifiers. 
 6584      [Steve Henson]
 6585 
 6586   *) Make sk_sort() tolerate a NULL argument.
 6587      [Steve Henson reported by Massimiliano Pala <madwolf@comune.modena.it>]
 6588 
 6589   *) New OCSP verify flag OCSP_TRUSTOTHER. When set the "other" certificates
 6590      passed by the function are trusted implicitly. If any of them signed the
 6591      response then it is assumed to be valid and is not verified.
 6592      [Steve Henson]
 6593 
 6594   *) In PKCS7_set_type() initialise content_type in PKCS7_ENC_CONTENT
 6595      to data. This was previously part of the PKCS7 ASN1 code. This
 6596      was causing problems with OpenSSL created PKCS#12 and PKCS#7 structures.
 6597      [Steve Henson, reported by Kenneth R. Robinette
 6598 				<support@securenetterm.com>]
 6599 
 6600   *) Add CRYPTO_push_info() and CRYPTO_pop_info() calls to new ASN1
 6601      routines: without these tracing memory leaks is very painful.
 6602      Fix leaks in PKCS12 and PKCS7 routines.
 6603      [Steve Henson]
 6604 
 6605   *) Make X509_time_adj() cope with the new behaviour of ASN1_TIME_new().
 6606      Previously it initialised the 'type' argument to V_ASN1_UTCTIME which
 6607      effectively meant GeneralizedTime would never be used. Now it
 6608      is initialised to -1 but X509_time_adj() now has to check the value
 6609      and use ASN1_TIME_set() if the value is not V_ASN1_UTCTIME or
 6610      V_ASN1_GENERALIZEDTIME, without this it always uses GeneralizedTime.
 6611      [Steve Henson, reported by Kenneth R. Robinette
 6612 				<support@securenetterm.com>]
 6613 
 6614   *) Fixes to BN_to_ASN1_INTEGER when bn is zero. This would previously
 6615      result in a zero length in the ASN1_INTEGER structure which was
 6616      not consistent with the structure when d2i_ASN1_INTEGER() was used
 6617      and would cause ASN1_INTEGER_cmp() to fail. Enhance s2i_ASN1_INTEGER()
 6618      to cope with hex and negative integers. Fix bug in i2a_ASN1_INTEGER()
 6619      where it did not print out a minus for negative ASN1_INTEGER.
 6620      [Steve Henson]
 6621 
 6622   *) Add summary printout to ocsp utility. The various functions which
 6623      convert status values to strings have been renamed to:
 6624      OCSP_response_status_str(), OCSP_cert_status_str() and
 6625      OCSP_crl_reason_str() and are no longer static. New options
 6626      to verify nonce values and to disable verification. OCSP response
 6627      printout format cleaned up.
 6628      [Steve Henson]
 6629 
 6630   *) Add additional OCSP certificate checks. These are those specified
 6631      in RFC2560. This consists of two separate checks: the CA of the
 6632      certificate being checked must either be the OCSP signer certificate
 6633      or the issuer of the OCSP signer certificate. In the latter case the
 6634      OCSP signer certificate must contain the OCSP signing extended key
 6635      usage. This check is performed by attempting to match the OCSP
 6636      signer or the OCSP signer CA to the issuerNameHash and issuerKeyHash
 6637      in the OCSP_CERTID structures of the response.
 6638      [Steve Henson]
 6639 
 6640   *) Initial OCSP certificate verification added to OCSP_basic_verify()
 6641      and related routines. This uses the standard OpenSSL certificate
 6642      verify routines to perform initial checks (just CA validity) and
 6643      to obtain the certificate chain. Then additional checks will be
 6644      performed on the chain. Currently the root CA is checked to see
 6645      if it is explicitly trusted for OCSP signing. This is used to set
 6646      a root CA as a global signing root: that is any certificate that
 6647      chains to that CA is an acceptable OCSP signing certificate.
 6648      [Steve Henson]
 6649 
 6650   *) New '-extfile ...' option to 'openssl ca' for reading X.509v3
 6651      extensions from a separate configuration file.
 6652      As when reading extensions from the main configuration file,
 6653      the '-extensions ...' option may be used for specifying the
 6654      section to use.
 6655      [Massimiliano Pala <madwolf@comune.modena.it>]
 6656 
 6657   *) New OCSP utility. Allows OCSP requests to be generated or
 6658      read. The request can be sent to a responder and the output
 6659      parsed, outputed or printed in text form. Not complete yet:
 6660      still needs to check the OCSP response validity.
 6661      [Steve Henson]
 6662 
 6663   *) New subcommands for 'openssl ca':
 6664      'openssl ca -status <serial>' prints the status of the cert with
 6665      the given serial number (according to the index file).
 6666      'openssl ca -updatedb' updates the expiry status of certificates
 6667      in the index file.
 6668      [Massimiliano Pala <madwolf@comune.modena.it>]
 6669 
 6670   *) New '-newreq-nodes' command option to CA.pl.  This is like
 6671      '-newreq', but calls 'openssl req' with the '-nodes' option
 6672      so that the resulting key is not encrypted.
 6673      [Damien Miller <djm@mindrot.org>]
 6674 
 6675   *) New configuration for the GNU Hurd.
 6676      [Jonathan Bartlett <johnnyb@wolfram.com> via Richard Levitte]
 6677 
 6678   *) Initial code to implement OCSP basic response verify. This
 6679      is currently incomplete. Currently just finds the signer's
 6680      certificate and verifies the signature on the response.
 6681      [Steve Henson]
 6682 
 6683   *) New SSLeay_version code SSLEAY_DIR to determine the compiled-in
 6684      value of OPENSSLDIR.  This is available via the new '-d' option
 6685      to 'openssl version', and is also included in 'openssl version -a'.
 6686      [Bodo Moeller]
 6687 
 6688   *) Allowing defining memory allocation callbacks that will be given
 6689      file name and line number information in additional arguments
 6690      (a const char* and an int).  The basic functionality remains, as
 6691      well as the original possibility to just replace malloc(),
 6692      realloc() and free() by functions that do not know about these
 6693      additional arguments.  To register and find out the current
 6694      settings for extended allocation functions, the following
 6695      functions are provided:
 6696 
 6697 	CRYPTO_set_mem_ex_functions
 6698 	CRYPTO_set_locked_mem_ex_functions
 6699 	CRYPTO_get_mem_ex_functions
 6700 	CRYPTO_get_locked_mem_ex_functions
 6701 
 6702      These work the same way as CRYPTO_set_mem_functions and friends.
 6703      CRYPTO_get_[locked_]mem_functions now writes 0 where such an
 6704      extended allocation function is enabled.
 6705      Similarly, CRYPTO_get_[locked_]mem_ex_functions writes 0 where
 6706      a conventional allocation function is enabled.
 6707      [Richard Levitte, Bodo Moeller]
 6708 
 6709   *) Finish off removing the remaining LHASH function pointer casts.
 6710      There should no longer be any prototype-casting required when using
 6711      the LHASH abstraction, and any casts that remain are "bugs". See
 6712      the callback types and macros at the head of lhash.h for details
 6713      (and "OBJ_cleanup" in crypto/objects/obj_dat.c as an example).
 6714      [Geoff Thorpe]
 6715 
 6716   *) Add automatic query of EGD sockets in RAND_poll() for the unix variant.
 6717      If /dev/[u]random devices are not available or do not return enough
 6718      entropy, EGD style sockets (served by EGD or PRNGD) will automatically
 6719      be queried.
 6720      The locations /var/run/egd-pool, /dev/egd-pool, /etc/egd-pool, and
 6721      /etc/entropy will be queried once each in this sequence, quering stops
 6722      when enough entropy was collected without querying more sockets.
 6723      [Lutz Jaenicke]
 6724 
 6725   *) Change the Unix RAND_poll() variant to be able to poll several
 6726      random devices, as specified by DEVRANDOM, until a sufficient amount
 6727      of data has been collected.   We spend at most 10 ms on each file
 6728      (select timeout) and read in non-blocking mode.  DEVRANDOM now
 6729      defaults to the list "/dev/urandom", "/dev/random", "/dev/srandom"
 6730      (previously it was just the string "/dev/urandom"), so on typical
 6731      platforms the 10 ms delay will never occur.
 6732      Also separate out the Unix variant to its own file, rand_unix.c.
 6733      For VMS, there's a currently-empty rand_vms.c.
 6734      [Richard Levitte]
 6735 
 6736   *) Move OCSP client related routines to ocsp_cl.c. These
 6737      provide utility functions which an application needing
 6738      to issue a request to an OCSP responder and analyse the
 6739      response will typically need: as opposed to those which an
 6740      OCSP responder itself would need which will be added later.
 6741 
 6742      OCSP_request_sign() signs an OCSP request with an API similar
 6743      to PKCS7_sign(). OCSP_response_status() returns status of OCSP
 6744      response. OCSP_response_get1_basic() extracts basic response
 6745      from response. OCSP_resp_find_status(): finds and extracts status
 6746      information from an OCSP_CERTID structure (which will be created
 6747      when the request structure is built). These are built from lower
 6748      level functions which work on OCSP_SINGLERESP structures but
 6749      wont normally be used unless the application wishes to examine
 6750      extensions in the OCSP response for example.
 6751 
 6752      Replace nonce routines with a pair of functions.
 6753      OCSP_request_add1_nonce() adds a nonce value and optionally
 6754      generates a random value. OCSP_check_nonce() checks the
 6755      validity of the nonce in an OCSP response.
 6756      [Steve Henson]
 6757 
 6758   *) Change function OCSP_request_add() to OCSP_request_add0_id().
 6759      This doesn't copy the supplied OCSP_CERTID and avoids the
 6760      need to free up the newly created id. Change return type
 6761      to OCSP_ONEREQ to return the internal OCSP_ONEREQ structure.
 6762      This can then be used to add extensions to the request.
 6763      Deleted OCSP_request_new(), since most of its functionality
 6764      is now in OCSP_REQUEST_new() (and the case insensitive name
 6765      clash) apart from the ability to set the request name which
 6766      will be added elsewhere.
 6767      [Steve Henson]
 6768 
 6769   *) Update OCSP API. Remove obsolete extensions argument from
 6770      various functions. Extensions are now handled using the new
 6771      OCSP extension code. New simple OCSP HTTP function which 
 6772      can be used to send requests and parse the response.
 6773      [Steve Henson]
 6774 
 6775   *) Fix the PKCS#7 (S/MIME) code to work with new ASN1. Two new
 6776      ASN1_ITEM structures help with sign and verify. PKCS7_ATTR_SIGN
 6777      uses the special reorder version of SET OF to sort the attributes
 6778      and reorder them to match the encoded order. This resolves a long
 6779      standing problem: a verify on a PKCS7 structure just after signing
 6780      it used to fail because the attribute order did not match the
 6781      encoded order. PKCS7_ATTR_VERIFY does not reorder the attributes:
 6782      it uses the received order. This is necessary to tolerate some broken
 6783      software that does not order SET OF. This is handled by encoding
 6784      as a SEQUENCE OF but using implicit tagging (with UNIVERSAL class)
 6785      to produce the required SET OF.
 6786      [Steve Henson]
 6787 
 6788   *) Have mk1mf.pl generate the macros OPENSSL_BUILD_SHLIBCRYPTO and
 6789      OPENSSL_BUILD_SHLIBSSL and use them appropriately in the header
 6790      files to get correct declarations of the ASN.1 item variables.
 6791      [Richard Levitte]
 6792 
 6793   *) Rewrite of PKCS#12 code to use new ASN1 functionality. Replace many
 6794      PKCS#12 macros with real functions. Fix two unrelated ASN1 bugs:
 6795      asn1_check_tlen() would sometimes attempt to use 'ctx' when it was
 6796      NULL and ASN1_TYPE was not dereferenced properly in asn1_ex_c2i().
 6797      New ASN1 macro: DECLARE_ASN1_ITEM() which just declares the relevant
 6798      ASN1_ITEM and no wrapper functions.
 6799      [Steve Henson]
 6800 
 6801   *) New functions or ASN1_item_d2i_fp() and ASN1_item_d2i_bio(). These
 6802      replace the old function pointer based I/O routines. Change most of
 6803      the *_d2i_bio() and *_d2i_fp() functions to use these.
 6804      [Steve Henson]
 6805 
 6806   *) Enhance mkdef.pl to be more accepting about spacing in C preprocessor
 6807      lines, recognice more "algorithms" that can be deselected, and make
 6808      it complain about algorithm deselection that isn't recognised.
 6809      [Richard Levitte]
 6810 
 6811   *) New ASN1 functions to handle dup, sign, verify, digest, pack and
 6812      unpack operations in terms of ASN1_ITEM. Modify existing wrappers
 6813      to use new functions. Add NO_ASN1_OLD which can be set to remove
 6814      some old style ASN1 functions: this can be used to determine if old
 6815      code will still work when these eventually go away.
 6816      [Steve Henson]
 6817 
 6818   *) New extension functions for OCSP structures, these follow the
 6819      same conventions as certificates and CRLs.
 6820      [Steve Henson]
 6821 
 6822   *) New function X509V3_add1_i2d(). This automatically encodes and
 6823      adds an extension. Its behaviour can be customised with various
 6824      flags to append, replace or delete. Various wrappers added for
 6825      certifcates and CRLs.
 6826      [Steve Henson]
 6827 
 6828   *) Fix to avoid calling the underlying ASN1 print routine when
 6829      an extension cannot be parsed. Correct a typo in the
 6830      OCSP_SERVICELOC extension. Tidy up print OCSP format.
 6831      [Steve Henson]
 6832 
 6833   *) Make mkdef.pl parse some of the ASN1 macros and add apropriate
 6834      entries for variables.
 6835      [Steve Henson]
 6836 
 6837   *) Add functionality to apps/openssl.c for detecting locking
 6838      problems: As the program is single-threaded, all we have
 6839      to do is register a locking callback using an array for
 6840      storing which locks are currently held by the program.
 6841      [Bodo Moeller]
 6842 
 6843   *) Use a lock around the call to CRYPTO_get_ex_new_index() in
 6844      SSL_get_ex_data_X509_STORE_idx(), which is used in
 6845      ssl_verify_cert_chain() and thus can be called at any time
 6846      during TLS/SSL handshakes so that thread-safety is essential.
 6847      Unfortunately, the ex_data design is not at all suited
 6848      for multi-threaded use, so it probably should be abolished.
 6849      [Bodo Moeller]
 6850 
 6851   *) Added Broadcom "ubsec" ENGINE to OpenSSL.
 6852      [Broadcom, tweaked and integrated by Geoff Thorpe]
 6853 
 6854   *) Move common extension printing code to new function
 6855      X509V3_print_extensions(). Reorganise OCSP print routines and
 6856      implement some needed OCSP ASN1 functions. Add OCSP extensions.
 6857      [Steve Henson]
 6858 
 6859   *) New function X509_signature_print() to remove duplication in some
 6860      print routines.
 6861      [Steve Henson]
 6862 
 6863   *) Add a special meaning when SET OF and SEQUENCE OF flags are both
 6864      set (this was treated exactly the same as SET OF previously). This
 6865      is used to reorder the STACK representing the structure to match the
 6866      encoding. This will be used to get round a problem where a PKCS7
 6867      structure which was signed could not be verified because the STACK
 6868      order did not reflect the encoded order.
 6869      [Steve Henson]
 6870 
 6871   *) Reimplement the OCSP ASN1 module using the new code.
 6872      [Steve Henson]
 6873 
 6874   *) Update the X509V3 code to permit the use of an ASN1_ITEM structure
 6875      for its ASN1 operations. The old style function pointers still exist
 6876      for now but they will eventually go away.
 6877      [Steve Henson]
 6878 
 6879   *) Merge in replacement ASN1 code from the ASN1 branch. This almost
 6880      completely replaces the old ASN1 functionality with a table driven
 6881      encoder and decoder which interprets an ASN1_ITEM structure describing
 6882      the ASN1 module. Compatibility with the existing ASN1 API (i2d,d2i) is
 6883      largely maintained. Almost all of the old asn1_mac.h macro based ASN1
 6884      has also been converted to the new form.
 6885      [Steve Henson]
 6886 
 6887   *) Change BN_mod_exp_recp so that negative moduli are tolerated
 6888      (the sign is ignored).  Similarly, ignore the sign in BN_MONT_CTX_set
 6889      so that BN_mod_exp_mont and BN_mod_exp_mont_word work
 6890      for negative moduli.
 6891      [Bodo Moeller]
 6892 
 6893   *) Fix BN_uadd and BN_usub: Always return non-negative results instead
 6894      of not touching the result's sign bit.
 6895      [Bodo Moeller]
 6896 
 6897   *) BN_div bugfix: If the result is 0, the sign (res->neg) must not be
 6898      set.
 6899      [Bodo Moeller]
 6900 
 6901   *) Changed the LHASH code to use prototypes for callbacks, and created
 6902      macros to declare and implement thin (optionally static) functions
 6903      that provide type-safety and avoid function pointer casting for the
 6904      type-specific callbacks.
 6905      [Geoff Thorpe]
 6906 
 6907   *) Added Kerberos Cipher Suites to be used with TLS, as written in
 6908      RFC 2712.
 6909      [Veers Staats <staatsvr@asc.hpc.mil>,
 6910       Jeffrey Altman <jaltman@columbia.edu>, via Richard Levitte]
 6911 
 6912   *) Reformat the FAQ so the different questions and answers can be divided
 6913      in sections depending on the subject.
 6914      [Richard Levitte]
 6915 
 6916   *) Have the zlib compression code load ZLIB.DLL dynamically under
 6917      Windows.
 6918      [Richard Levitte]
 6919 
 6920   *) New function BN_mod_sqrt for computing square roots modulo a prime
 6921      (using the probabilistic Tonelli-Shanks algorithm unless
 6922      p == 3 (mod 4)  or  p == 5 (mod 8),  which are cases that can
 6923      be handled deterministically).
 6924      [Lenka Fibikova <fibikova@exp-math.uni-essen.de>, Bodo Moeller]
 6925 
 6926   *) Make BN_mod_inverse faster by explicitly handling small quotients
 6927      in the Euclid loop. (Speed gain about 20% for small moduli [256 or
 6928      512 bits], about 30% for larger ones [1024 or 2048 bits].)
 6929      [Bodo Moeller]
 6930 
 6931   *) New function BN_kronecker.
 6932      [Bodo Moeller]
 6933 
 6934   *) Fix BN_gcd so that it works on negative inputs; the result is
 6935      positive unless both parameters are zero.
 6936      Previously something reasonably close to an infinite loop was
 6937      possible because numbers could be growing instead of shrinking
 6938      in the implementation of Euclid's algorithm.
 6939      [Bodo Moeller]
 6940 
 6941   *) Fix BN_is_word() and BN_is_one() macros to take into account the
 6942      sign of the number in question.
 6943 
 6944      Fix BN_is_word(a,w) to work correctly for w == 0.
 6945 
 6946      The old BN_is_word(a,w) macro is now called BN_abs_is_word(a,w)
 6947      because its test if the absolute value of 'a' equals 'w'.
 6948      Note that BN_abs_is_word does *not* handle w == 0 reliably;
 6949      it exists mostly for use in the implementations of BN_is_zero(),
 6950      BN_is_one(), and BN_is_word().
 6951      [Bodo Moeller]
 6952 
 6953   *) New function BN_swap.
 6954      [Bodo Moeller]
 6955 
 6956   *) Use BN_nnmod instead of BN_mod in crypto/bn/bn_exp.c so that
 6957      the exponentiation functions are more likely to produce reasonable
 6958      results on negative inputs.
 6959      [Bodo Moeller]
 6960 
 6961   *) Change BN_mod_mul so that the result is always non-negative.
 6962      Previously, it could be negative if one of the factors was negative;
 6963      I don't think anyone really wanted that behaviour.
 6964      [Bodo Moeller]
 6965 
 6966   *) Move BN_mod_... functions into new file crypto/bn/bn_mod.c
 6967      (except for exponentiation, which stays in crypto/bn/bn_exp.c,
 6968      and BN_mod_mul_reciprocal, which stays in crypto/bn/bn_recp.c)
 6969      and add new functions:
 6970 
 6971           BN_nnmod
 6972           BN_mod_sqr
 6973           BN_mod_add
 6974           BN_mod_add_quick
 6975           BN_mod_sub
 6976           BN_mod_sub_quick
 6977           BN_mod_lshift1
 6978           BN_mod_lshift1_quick
 6979           BN_mod_lshift
 6980           BN_mod_lshift_quick
 6981 
 6982      These functions always generate non-negative results.
 6983 
 6984      BN_nnmod otherwise is like BN_mod (if BN_mod computes a remainder  r
 6985      such that  |m| < r < 0,  BN_nnmod will output  rem + |m|  instead).
 6986 
 6987      BN_mod_XXX_quick(r, a, [b,] m) generates the same result as
 6988      BN_mod_XXX(r, a, [b,] m, ctx), but requires that  a  [and  b]
 6989      be reduced modulo  m.
 6990      [Lenka Fibikova <fibikova@exp-math.uni-essen.de>, Bodo Moeller]
 6991 
 6992 #if 0
 6993      The following entry accidentily appeared in the CHANGES file
 6994      distributed with OpenSSL 0.9.7.  The modifications described in
 6995      it do *not* apply to OpenSSL 0.9.7.
 6996 
 6997   *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
 6998      was actually never needed) and in BN_mul().  The removal in BN_mul()
 6999      required a small change in bn_mul_part_recursive() and the addition
 7000      of the functions bn_cmp_part_words(), bn_sub_part_words() and
 7001      bn_add_part_words(), which do the same thing as bn_cmp_words(),
 7002      bn_sub_words() and bn_add_words() except they take arrays with
 7003      differing sizes.
 7004      [Richard Levitte]
 7005 #endif
 7006 
 7007   *) In 'openssl passwd', verify passwords read from the terminal
 7008      unless the '-salt' option is used (which usually means that
 7009      verification would just waste user's time since the resulting
 7010      hash is going to be compared with some given password hash)
 7011      or the new '-noverify' option is used.
 7012 
 7013      This is an incompatible change, but it does not affect
 7014      non-interactive use of 'openssl passwd' (passwords on the command
 7015      line, '-stdin' option, '-in ...' option) and thus should not
 7016      cause any problems.
 7017      [Bodo Moeller]
 7018 
 7019   *) Remove all references to RSAref, since there's no more need for it.
 7020      [Richard Levitte]
 7021 
 7022   *) Make DSO load along a path given through an environment variable
 7023      (SHLIB_PATH) with shl_load().
 7024      [Richard Levitte]
 7025 
 7026   *) Constify the ENGINE code as a result of BIGNUM constification.
 7027      Also constify the RSA code and most things related to it.  In a
 7028      few places, most notable in the depth of the ASN.1 code, ugly
 7029      casts back to non-const were required (to be solved at a later
 7030      time)
 7031      [Richard Levitte]
 7032 
 7033   *) Make it so the openssl application has all engines loaded by default.
 7034      [Richard Levitte]
 7035 
 7036   *) Constify the BIGNUM routines a little more.
 7037      [Richard Levitte]
 7038 
 7039   *) Add the following functions:
 7040 
 7041 	ENGINE_load_cswift()
 7042 	ENGINE_load_chil()
 7043 	ENGINE_load_atalla()
 7044 	ENGINE_load_nuron()
 7045 	ENGINE_load_builtin_engines()
 7046 
 7047      That way, an application can itself choose if external engines that
 7048      are built-in in OpenSSL shall ever be used or not.  The benefit is
 7049      that applications won't have to be linked with libdl or other dso
 7050      libraries unless it's really needed.
 7051 
 7052      Changed 'openssl engine' to load all engines on demand.
 7053      Changed the engine header files to avoid the duplication of some
 7054      declarations (they differed!).
 7055      [Richard Levitte]
 7056 
 7057   *) 'openssl engine' can now list capabilities.
 7058      [Richard Levitte]
 7059 
 7060   *) Better error reporting in 'openssl engine'.
 7061      [Richard Levitte]
 7062 
 7063   *) Never call load_dh_param(NULL) in s_server.
 7064      [Bodo Moeller]
 7065 
 7066   *) Add engine application.  It can currently list engines by name and
 7067      identity, and test if they are actually available.
 7068      [Richard Levitte]
 7069 
 7070   *) Improve RPM specification file by forcing symbolic linking and making
 7071      sure the installed documentation is also owned by root.root.
 7072      [Damien Miller <djm@mindrot.org>]
 7073 
 7074   *) Give the OpenSSL applications more possibilities to make use of
 7075      keys (public as well as private) handled by engines.
 7076      [Richard Levitte]
 7077 
 7078   *) Add OCSP code that comes from CertCo.
 7079      [Richard Levitte]
 7080 
 7081   *) Add VMS support for the Rijndael code.
 7082      [Richard Levitte]
 7083 
 7084   *) Added untested support for Nuron crypto accelerator.
 7085      [Ben Laurie]
 7086 
 7087   *) Add support for external cryptographic devices.  This code was
 7088      previously distributed separately as the "engine" branch.
 7089      [Geoff Thorpe, Richard Levitte]
 7090 
 7091   *) Rework the filename-translation in the DSO code. It is now possible to
 7092      have far greater control over how a "name" is turned into a filename
 7093      depending on the operating environment and any oddities about the
 7094      different shared library filenames on each system.
 7095      [Geoff Thorpe]
 7096 
 7097   *) Support threads on FreeBSD-elf in Configure.
 7098      [Richard Levitte]
 7099 
 7100   *) Fix for SHA1 assembly problem with MASM: it produces
 7101      warnings about corrupt line number information when assembling
 7102      with debugging information. This is caused by the overlapping
 7103      of two sections.
 7104      [Bernd Matthes <mainbug@celocom.de>, Steve Henson]
 7105 
 7106   *) NCONF changes.
 7107      NCONF_get_number() has no error checking at all.  As a replacement,
 7108      NCONF_get_number_e() is defined (_e for "error checking") and is
 7109      promoted strongly.  The old NCONF_get_number is kept around for
 7110      binary backward compatibility.
 7111      Make it possible for methods to load from something other than a BIO,
 7112      by providing a function pointer that is given a name instead of a BIO.
 7113      For example, this could be used to load configuration data from an
 7114      LDAP server.
 7115      [Richard Levitte]
 7116 
 7117   *) Fix for non blocking accept BIOs. Added new I/O special reason
 7118      BIO_RR_ACCEPT to cover this case. Previously use of accept BIOs
 7119      with non blocking I/O was not possible because no retry code was
 7120      implemented. Also added new SSL code SSL_WANT_ACCEPT to cover
 7121      this case.
 7122      [Steve Henson]
 7123 
 7124   *) Added the beginnings of Rijndael support.
 7125      [Ben Laurie]
 7126 
 7127   *) Fix for bug in DirectoryString mask setting. Add support for
 7128      X509_NAME_print_ex() in 'req' and X509_print_ex() function
 7129      to allow certificate printing to more controllable, additional
 7130      'certopt' option to 'x509' to allow new printing options to be
 7131      set.
 7132      [Steve Henson]
 7133 
 7134   *) Clean old EAY MD5 hack from e_os.h.
 7135      [Richard Levitte]
 7136 
 7137  Changes between 0.9.6l and 0.9.6m  [17 Mar 2004]
 7138 
 7139   *) Fix null-pointer assignment in do_change_cipher_spec() revealed
 7140      by using the Codenomicon TLS Test Tool (CVE-2004-0079)
 7141      [Joe Orton, Steve Henson]
 7142 
 7143  Changes between 0.9.6k and 0.9.6l  [04 Nov 2003]
 7144 
 7145   *) Fix additional bug revealed by the NISCC test suite:
 7146 
 7147      Stop bug triggering large recursion when presented with
 7148      certain ASN.1 tags (CVE-2003-0851)
 7149      [Steve Henson]
 7150 
 7151  Changes between 0.9.6j and 0.9.6k  [30 Sep 2003]
 7152 
 7153   *) Fix various bugs revealed by running the NISCC test suite:
 7154 
 7155      Stop out of bounds reads in the ASN1 code when presented with
 7156      invalid tags (CVE-2003-0543 and CVE-2003-0544).
 7157      
 7158      If verify callback ignores invalid public key errors don't try to check
 7159      certificate signature with the NULL public key.
 7160 
 7161      [Steve Henson]
 7162 
 7163   *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
 7164      if the server requested one: as stated in TLS 1.0 and SSL 3.0
 7165      specifications.
 7166      [Steve Henson]
 7167 
 7168   *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
 7169      extra data after the compression methods not only for TLS 1.0
 7170      but also for SSL 3.0 (as required by the specification).
 7171      [Bodo Moeller; problem pointed out by Matthias Loepfe]
 7172 
 7173   *) Change X509_certificate_type() to mark the key as exported/exportable
 7174      when it's 512 *bits* long, not 512 bytes.
 7175      [Richard Levitte]
 7176 
 7177  Changes between 0.9.6i and 0.9.6j  [10 Apr 2003]
 7178 
 7179   *) Countermeasure against the Klima-Pokorny-Rosa extension of
 7180      Bleichbacher's attack on PKCS #1 v1.5 padding: treat
 7181      a protocol version number mismatch like a decryption error
 7182      in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
 7183      [Bodo Moeller]
 7184 
 7185   *) Turn on RSA blinding by default in the default implementation
 7186      to avoid a timing attack. Applications that don't want it can call
 7187      RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
 7188      They would be ill-advised to do so in most cases.
 7189      [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
 7190 
 7191   *) Change RSA blinding code so that it works when the PRNG is not
 7192      seeded (in this case, the secret RSA exponent is abused as
 7193      an unpredictable seed -- if it is not unpredictable, there
 7194      is no point in blinding anyway).  Make RSA blinding thread-safe
 7195      by remembering the creator's thread ID in rsa->blinding and
 7196      having all other threads use local one-time blinding factors
 7197      (this requires more computation than sharing rsa->blinding, but
 7198      avoids excessive locking; and if an RSA object is not shared
 7199      between threads, blinding will still be very fast).
 7200      [Bodo Moeller]
 7201 
 7202  Changes between 0.9.6h and 0.9.6i  [19 Feb 2003]
 7203 
 7204   *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
 7205      via timing by performing a MAC computation even if incorrrect
 7206      block cipher padding has been found.  This is a countermeasure
 7207      against active attacks where the attacker has to distinguish
 7208      between bad padding and a MAC verification error. (CVE-2003-0078)
 7209 
 7210      [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
 7211      Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
 7212      Martin Vuagnoux (EPFL, Ilion)]
 7213 
 7214  Changes between 0.9.6g and 0.9.6h  [5 Dec 2002]
 7215 
 7216   *) New function OPENSSL_cleanse(), which is used to cleanse a section of
 7217      memory from it's contents.  This is done with a counter that will
 7218      place alternating values in each byte.  This can be used to solve
 7219      two issues: 1) the removal of calls to memset() by highly optimizing
 7220      compilers, and 2) cleansing with other values than 0, since those can
 7221      be read through on certain media, for example a swap space on disk.
 7222      [Geoff Thorpe]
 7223 
 7224   *) Bugfix: client side session caching did not work with external caching,
 7225      because the session->cipher setting was not restored when reloading
 7226      from the external cache. This problem was masked, when
 7227      SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG (part of SSL_OP_ALL) was set.
 7228      (Found by Steve Haslam <steve@araqnid.ddts.net>.)
 7229      [Lutz Jaenicke]
 7230 
 7231   *) Fix client_certificate (ssl/s2_clnt.c): The permissible total
 7232      length of the REQUEST-CERTIFICATE message is 18 .. 34, not 17 .. 33.
 7233      [Zeev Lieber <zeev-l@yahoo.com>]
 7234 
 7235   *) Undo an undocumented change introduced in 0.9.6e which caused
 7236      repeated calls to OpenSSL_add_all_ciphers() and 
 7237      OpenSSL_add_all_digests() to be ignored, even after calling
 7238      EVP_cleanup().
 7239      [Richard Levitte]
 7240 
 7241   *) Change the default configuration reader to deal with last line not
 7242      being properly terminated.
 7243      [Richard Levitte]
 7244 
 7245   *) Change X509_NAME_cmp() so it applies the special rules on handling
 7246      DN values that are of type PrintableString, as well as RDNs of type
 7247      emailAddress where the value has the type ia5String.
 7248      [stefank@valicert.com via Richard Levitte]
 7249 
 7250   *) Add a SSL_SESS_CACHE_NO_INTERNAL_STORE flag to take over half
 7251      the job SSL_SESS_CACHE_NO_INTERNAL_LOOKUP was inconsistently
 7252      doing, define a new flag (SSL_SESS_CACHE_NO_INTERNAL) to be
 7253      the bitwise-OR of the two for use by the majority of applications
 7254      wanting this behaviour, and update the docs. The documented
 7255      behaviour and actual behaviour were inconsistent and had been
 7256      changing anyway, so this is more a bug-fix than a behavioural
 7257      change.
 7258      [Geoff Thorpe, diagnosed by Nadav Har'El]
 7259 
 7260   *) Don't impose a 16-byte length minimum on session IDs in ssl/s3_clnt.c
 7261      (the SSL 3.0 and TLS 1.0 specifications allow any length up to 32 bytes).
 7262      [Bodo Moeller]
 7263 
 7264   *) Fix initialization code race conditions in
 7265         SSLv23_method(),  SSLv23_client_method(),   SSLv23_server_method(),
 7266         SSLv2_method(),   SSLv2_client_method(),    SSLv2_server_method(),
 7267         SSLv3_method(),   SSLv3_client_method(),    SSLv3_server_method(),
 7268         TLSv1_method(),   TLSv1_client_method(),    TLSv1_server_method(),
 7269         ssl2_get_cipher_by_char(),
 7270         ssl3_get_cipher_by_char().
 7271      [Patrick McCormick <patrick@tellme.com>, Bodo Moeller]
 7272 
 7273   *) Reorder cleanup sequence in SSL_CTX_free(): only remove the ex_data after
 7274      the cached sessions are flushed, as the remove_cb() might use ex_data
 7275      contents. Bug found by Sam Varshavchik <mrsam@courier-mta.com>
 7276      (see [openssl.org #212]).
 7277      [Geoff Thorpe, Lutz Jaenicke]
 7278 
 7279   *) Fix typo in OBJ_txt2obj which incorrectly passed the content
 7280      length, instead of the encoding length to d2i_ASN1_OBJECT.
 7281      [Steve Henson]
 7282 
 7283  Changes between 0.9.6f and 0.9.6g  [9 Aug 2002]
 7284 
 7285   *) [In 0.9.6g-engine release:]
 7286      Fix crypto/engine/vendor_defns/cswift.h for WIN32 (use '_stdcall').
 7287      [Lynn Gazis <lgazis@rainbow.com>]
 7288 
 7289  Changes between 0.9.6e and 0.9.6f  [8 Aug 2002]
 7290 
 7291   *) Fix ASN1 checks. Check for overflow by comparing with LONG_MAX
 7292      and get fix the header length calculation.
 7293      [Florian Weimer <Weimer@CERT.Uni-Stuttgart.DE>,
 7294 	Alon Kantor <alonk@checkpoint.com> (and others),
 7295 	Steve Henson]
 7296 
 7297   *) Use proper error handling instead of 'assertions' in buffer
 7298      overflow checks added in 0.9.6e.  This prevents DoS (the
 7299      assertions could call abort()).
 7300      [Arne Ansper <arne@ats.cyber.ee>, Bodo Moeller]
 7301 
 7302  Changes between 0.9.6d and 0.9.6e  [30 Jul 2002]
 7303 
 7304   *) Add various sanity checks to asn1_get_length() to reject
 7305      the ASN1 length bytes if they exceed sizeof(long), will appear
 7306      negative or the content length exceeds the length of the
 7307      supplied buffer.
 7308      [Steve Henson, Adi Stav <stav@mercury.co.il>, James Yonan <jim@ntlp.com>]
 7309 
 7310   *) Fix cipher selection routines: ciphers without encryption had no flags
 7311      for the cipher strength set and where therefore not handled correctly
 7312      by the selection routines (PR #130).
 7313      [Lutz Jaenicke]
 7314 
 7315   *) Fix EVP_dsa_sha macro.
 7316      [Nils Larsch]
 7317 
 7318   *) New option
 7319           SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
 7320      for disabling the SSL 3.0/TLS 1.0 CBC vulnerability countermeasure
 7321      that was added in OpenSSL 0.9.6d.
 7322 
 7323      As the countermeasure turned out to be incompatible with some
 7324      broken SSL implementations, the new option is part of SSL_OP_ALL.
 7325      SSL_OP_ALL is usually employed when compatibility with weird SSL
 7326      implementations is desired (e.g. '-bugs' option to 's_client' and
 7327      's_server'), so the new option is automatically set in many
 7328      applications.
 7329      [Bodo Moeller]
 7330 
 7331   *) Changes in security patch:
 7332 
 7333      Changes marked "(CHATS)" were sponsored by the Defense Advanced
 7334      Research Projects Agency (DARPA) and Air Force Research Laboratory,
 7335      Air Force Materiel Command, USAF, under agreement number
 7336      F30602-01-2-0537.
 7337 
 7338   *) Add various sanity checks to asn1_get_length() to reject
 7339      the ASN1 length bytes if they exceed sizeof(long), will appear
 7340      negative or the content length exceeds the length of the
 7341      supplied buffer. (CVE-2002-0659)
 7342      [Steve Henson, Adi Stav <stav@mercury.co.il>, James Yonan <jim@ntlp.com>]
 7343 
 7344   *) Assertions for various potential buffer overflows, not known to
 7345      happen in practice.
 7346      [Ben Laurie (CHATS)]
 7347 
 7348   *) Various temporary buffers to hold ASCII versions of integers were
 7349      too small for 64 bit platforms. (CVE-2002-0655)
 7350      [Matthew Byng-Maddick <mbm@aldigital.co.uk> and Ben Laurie (CHATS)>
 7351 
 7352   *) Remote buffer overflow in SSL3 protocol - an attacker could
 7353      supply an oversized session ID to a client. (CVE-2002-0656)
 7354      [Ben Laurie (CHATS)]
 7355 
 7356   *) Remote buffer overflow in SSL2 protocol - an attacker could
 7357      supply an oversized client master key. (CVE-2002-0656)
 7358      [Ben Laurie (CHATS)]
 7359 
 7360  Changes between 0.9.6c and 0.9.6d  [9 May 2002]
 7361 
 7362   *) Fix crypto/asn1/a_sign.c so that 'parameters' is omitted (not
 7363      encoded as NULL) with id-dsa-with-sha1.
 7364      [Nils Larsch <nla@trustcenter.de>; problem pointed out by Bodo Moeller]
 7365 
 7366   *) Check various X509_...() return values in apps/req.c.
 7367      [Nils Larsch <nla@trustcenter.de>]
 7368 
 7369   *) Fix BASE64 decode (EVP_DecodeUpdate) for data with CR/LF ended lines:
 7370      an end-of-file condition would erronously be flagged, when the CRLF
 7371      was just at the end of a processed block. The bug was discovered when
 7372      processing data through a buffering memory BIO handing the data to a
 7373      BASE64-decoding BIO. Bug fund and patch submitted by Pavel Tsekov
 7374      <ptsekov@syntrex.com> and Nedelcho Stanev.
 7375      [Lutz Jaenicke]
 7376 
 7377   *) Implement a countermeasure against a vulnerability recently found
 7378      in CBC ciphersuites in SSL 3.0/TLS 1.0: Send an empty fragment
 7379      before application data chunks to avoid the use of known IVs
 7380      with data potentially chosen by the attacker.
 7381      [Bodo Moeller]
 7382 
 7383   *) Fix length checks in ssl3_get_client_hello().
 7384      [Bodo Moeller]
 7385 
 7386   *) TLS/SSL library bugfix: use s->s3->in_read_app_data differently
 7387      to prevent ssl3_read_internal() from incorrectly assuming that
 7388      ssl3_read_bytes() found application data while handshake
 7389      processing was enabled when in fact s->s3->in_read_app_data was
 7390      merely automatically cleared during the initial handshake.
 7391      [Bodo Moeller; problem pointed out by Arne Ansper <arne@ats.cyber.ee>]
 7392 
 7393   *) Fix object definitions for Private and Enterprise: they were not
 7394      recognized in their shortname (=lowercase) representation. Extend
 7395      obj_dat.pl to issue an error when using undefined keywords instead
 7396      of silently ignoring the problem (Svenning Sorensen
 7397      <sss@sss.dnsalias.net>).
 7398      [Lutz Jaenicke]
 7399 
 7400   *) Fix DH_generate_parameters() so that it works for 'non-standard'
 7401      generators, i.e. generators other than 2 and 5.  (Previously, the
 7402      code did not properly initialise the 'add' and 'rem' values to
 7403      BN_generate_prime().)
 7404 
 7405      In the new general case, we do not insist that 'generator' is
 7406      actually a primitive root: This requirement is rather pointless;
 7407      a generator of the order-q subgroup is just as good, if not
 7408      better.
 7409      [Bodo Moeller]
 7410  
 7411   *) Map new X509 verification errors to alerts. Discovered and submitted by
 7412      Tom Wu <tom@arcot.com>.
 7413      [Lutz Jaenicke]
 7414 
 7415   *) Fix ssl3_pending() (ssl/s3_lib.c) to prevent SSL_pending() from
 7416      returning non-zero before the data has been completely received
 7417      when using non-blocking I/O.
 7418      [Bodo Moeller; problem pointed out by John Hughes]
 7419 
 7420   *) Some of the ciphers missed the strength entry (SSL_LOW etc).
 7421      [Ben Laurie, Lutz Jaenicke]
 7422 
 7423   *) Fix bug in SSL_clear(): bad sessions were not removed (found by
 7424      Yoram Zahavi <YoramZ@gilian.com>).
 7425      [Lutz Jaenicke]
 7426 
 7427   *) Add information about CygWin 1.3 and on, and preserve proper
 7428      configuration for the versions before that.
 7429      [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
 7430 
 7431   *) Make removal from session cache (SSL_CTX_remove_session()) more robust:
 7432      check whether we deal with a copy of a session and do not delete from
 7433      the cache in this case. Problem reported by "Izhar Shoshani Levi"
 7434      <izhar@checkpoint.com>.
 7435      [Lutz Jaenicke]
 7436 
 7437   *) Do not store session data into the internal session cache, if it
 7438      is never intended to be looked up (SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
 7439      flag is set). Proposed by Aslam <aslam@funk.com>.
 7440      [Lutz Jaenicke]
 7441 
 7442   *) Have ASN1_BIT_STRING_set_bit() really clear a bit when the requested
 7443      value is 0.
 7444      [Richard Levitte]
 7445 
 7446   *) [In 0.9.6d-engine release:]
 7447      Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
 7448      [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
 7449 
 7450   *) Add the configuration target linux-s390x.
 7451      [Neale Ferguson <Neale.Ferguson@SoftwareAG-USA.com> via Richard Levitte]
 7452 
 7453   *) The earlier bugfix for the SSL3_ST_SW_HELLO_REQ_C case of
 7454      ssl3_accept (ssl/s3_srvr.c) incorrectly used a local flag
 7455      variable as an indication that a ClientHello message has been
 7456      received.  As the flag value will be lost between multiple
 7457      invocations of ssl3_accept when using non-blocking I/O, the
 7458      function may not be aware that a handshake has actually taken
 7459      place, thus preventing a new session from being added to the
 7460      session cache.
 7461 
 7462      To avoid this problem, we now set s->new_session to 2 instead of
 7463      using a local variable.
 7464      [Lutz Jaenicke, Bodo Moeller]
 7465 
 7466   *) Bugfix: Return -1 from ssl3_get_server_done (ssl3/s3_clnt.c)
 7467      if the SSL_R_LENGTH_MISMATCH error is detected.
 7468      [Geoff Thorpe, Bodo Moeller]
 7469 
 7470   *) New 'shared_ldflag' column in Configure platform table.
 7471      [Richard Levitte]
 7472 
 7473   *) Fix EVP_CIPHER_mode macro.
 7474      ["Dan S. Camper" <dan@bti.net>]
 7475 
 7476   *) Fix ssl3_read_bytes (ssl/s3_pkt.c): To ignore messages of unknown
 7477      type, we must throw them away by setting rr->length to 0.
 7478      [D P Chang <dpc@qualys.com>]
 7479 
 7480  Changes between 0.9.6b and 0.9.6c  [21 dec 2001]
 7481 
 7482   *) Fix BN_rand_range bug pointed out by Dominikus Scherkl
 7483      <Dominikus.Scherkl@biodata.com>.  (The previous implementation
 7484      worked incorrectly for those cases where  range = 10..._2  and
 7485      3*range  is two bits longer than  range.)
 7486      [Bodo Moeller]
 7487 
 7488   *) Only add signing time to PKCS7 structures if it is not already
 7489      present.
 7490      [Steve Henson]
 7491 
 7492   *) Fix crypto/objects/objects.h: "ld-ce" should be "id-ce",
 7493      OBJ_ld_ce should be OBJ_id_ce.
 7494      Also some ip-pda OIDs in crypto/objects/objects.txt were
 7495      incorrect (cf. RFC 3039).
 7496      [Matt Cooper, Frederic Giudicelli, Bodo Moeller]
 7497 
 7498   *) Release CRYPTO_LOCK_DYNLOCK when CRYPTO_destroy_dynlockid()
 7499      returns early because it has nothing to do.
 7500      [Andy Schneider <andy.schneider@bjss.co.uk>]
 7501 
 7502   *) [In 0.9.6c-engine release:]
 7503      Fix mutex callback return values in crypto/engine/hw_ncipher.c.
 7504      [Andy Schneider <andy.schneider@bjss.co.uk>]
 7505 
 7506   *) [In 0.9.6c-engine release:]
 7507      Add support for Cryptographic Appliance's keyserver technology.
 7508      (Use engine 'keyclient')
 7509      [Cryptographic Appliances and Geoff Thorpe]
 7510 
 7511   *) Add a configuration entry for OS/390 Unix.  The C compiler 'c89'
 7512      is called via tools/c89.sh because arguments have to be
 7513      rearranged (all '-L' options must appear before the first object
 7514      modules).
 7515      [Richard Shapiro <rshapiro@abinitio.com>]
 7516 
 7517   *) [In 0.9.6c-engine release:]
 7518      Add support for Broadcom crypto accelerator cards, backported
 7519      from 0.9.7.
 7520      [Broadcom, Nalin Dahyabhai <nalin@redhat.com>, Mark Cox]
 7521 
 7522   *) [In 0.9.6c-engine release:]
 7523      Add support for SureWare crypto accelerator cards from 
 7524      Baltimore Technologies.  (Use engine 'sureware')
 7525      [Baltimore Technologies and Mark Cox]
 7526 
 7527   *) [In 0.9.6c-engine release:]
 7528      Add support for crypto accelerator cards from Accelerated
 7529      Encryption Processing, www.aep.ie.  (Use engine 'aep')
 7530      [AEP Inc. and Mark Cox]
 7531 
 7532   *) Add a configuration entry for gcc on UnixWare.
 7533      [Gary Benson <gbenson@redhat.com>]
 7534 
 7535   *) Change ssl/s2_clnt.c and ssl/s2_srvr.c so that received handshake
 7536      messages are stored in a single piece (fixed-length part and
 7537      variable-length part combined) and fix various bugs found on the way.
 7538      [Bodo Moeller]
 7539 
 7540   *) Disable caching in BIO_gethostbyname(), directly use gethostbyname()
 7541      instead.  BIO_gethostbyname() does not know what timeouts are
 7542      appropriate, so entries would stay in cache even when they have
 7543      become invalid.
 7544      [Bodo Moeller; problem pointed out by Rich Salz <rsalz@zolera.com>
 7545 
 7546   *) Change ssl23_get_client_hello (ssl/s23_srvr.c) behaviour when
 7547      faced with a pathologically small ClientHello fragment that does
 7548      not contain client_version: Instead of aborting with an error,
 7549      simply choose the highest available protocol version (i.e.,
 7550      TLS 1.0 unless it is disabled).  In practice, ClientHello
 7551      messages are never sent like this, but this change gives us
 7552      strictly correct behaviour at least for TLS.
 7553      [Bodo Moeller]
 7554 
 7555   *) Fix SSL handshake functions and SSL_clear() such that SSL_clear()
 7556      never resets s->method to s->ctx->method when called from within
 7557      one of the SSL handshake functions.
 7558      [Bodo Moeller; problem pointed out by Niko Baric]
 7559 
 7560   *) In ssl3_get_client_hello (ssl/s3_srvr.c), generate a fatal alert
 7561      (sent using the client's version number) if client_version is
 7562      smaller than the protocol version in use.  Also change
 7563      ssl23_get_client_hello (ssl/s23_srvr.c) to select TLS 1.0 if
 7564      the client demanded SSL 3.0 but only TLS 1.0 is enabled; then
 7565      the client will at least see that alert.
 7566      [Bodo Moeller]
 7567 
 7568   *) Fix ssl3_get_message (ssl/s3_both.c) to handle message fragmentation
 7569      correctly.
 7570      [Bodo Moeller]
 7571 
 7572   *) Avoid infinite loop in ssl3_get_message (ssl/s3_both.c) if a
 7573      client receives HelloRequest while in a handshake.
 7574      [Bodo Moeller; bug noticed by Andy Schneider <andy.schneider@bjss.co.uk>]
 7575 
 7576   *) Bugfix in ssl3_accept (ssl/s3_srvr.c): Case SSL3_ST_SW_HELLO_REQ_C
 7577      should end in 'break', not 'goto end' which circuments various
 7578      cleanups done in state SSL_ST_OK.   But session related stuff
 7579      must be disabled for SSL_ST_OK in the case that we just sent a
 7580      HelloRequest.
 7581 
 7582      Also avoid some overhead by not calling ssl_init_wbio_buffer()
 7583      before just sending a HelloRequest.
 7584      [Bodo Moeller, Eric Rescorla <ekr@rtfm.com>]
 7585 
 7586   *) Fix ssl/s3_enc.c, ssl/t1_enc.c and ssl/s3_pkt.c so that we don't
 7587      reveal whether illegal block cipher padding was found or a MAC
 7588      verification error occured.  (Neither SSLerr() codes nor alerts
 7589      are directly visible to potential attackers, but the information
 7590      may leak via logfiles.)
 7591 
 7592      Similar changes are not required for the SSL 2.0 implementation
 7593      because the number of padding bytes is sent in clear for SSL 2.0,
 7594      and the extra bytes are just ignored.  However ssl/s2_pkt.c
 7595      failed to verify that the purported number of padding bytes is in
 7596      the legal range.
 7597      [Bodo Moeller]
 7598 
 7599   *) Add OpenUNIX-8 support including shared libraries
 7600      (Boyd Lynn Gerber <gerberb@zenez.com>).
 7601      [Lutz Jaenicke]
 7602 
 7603   *) Improve RSA_padding_check_PKCS1_OAEP() check again to avoid
 7604      'wristwatch attack' using huge encoding parameters (cf.
 7605      James H. Manger's CRYPTO 2001 paper).  Note that the
 7606      RSA_PKCS1_OAEP_PADDING case of RSA_private_decrypt() does not use
 7607      encoding parameters and hence was not vulnerable.
 7608      [Bodo Moeller]
 7609 
 7610   *) BN_sqr() bug fix.
 7611      [Ulf Möller, reported by Jim Ellis <jim.ellis@cavium.com>]
 7612 
 7613   *) Rabin-Miller test analyses assume uniformly distributed witnesses,
 7614      so use BN_pseudo_rand_range() instead of using BN_pseudo_rand()
 7615      followed by modular reduction.
 7616      [Bodo Moeller; pointed out by Adam Young <AYoung1@NCSUS.JNJ.COM>]
 7617 
 7618   *) Add BN_pseudo_rand_range() with obvious functionality: BN_rand_range()
 7619      equivalent based on BN_pseudo_rand() instead of BN_rand().
 7620      [Bodo Moeller]
 7621 
 7622   *) s3_srvr.c: allow sending of large client certificate lists (> 16 kB).
 7623      This function was broken, as the check for a new client hello message
 7624      to handle SGC did not allow these large messages.
 7625      (Tracked down by "Douglas E. Engert" <deengert@anl.gov>.)
 7626      [Lutz Jaenicke]
 7627 
 7628   *) Add alert descriptions for TLSv1 to SSL_alert_desc_string[_long]().
 7629      [Lutz Jaenicke]
 7630 
 7631   *) Fix buggy behaviour of BIO_get_num_renegotiates() and BIO_ctrl()
 7632      for BIO_C_GET_WRITE_BUF_SIZE ("Stephen Hinton" <shinton@netopia.com>).
 7633      [Lutz Jaenicke]
 7634 
 7635   *) Rework the configuration and shared library support for Tru64 Unix.
 7636      The configuration part makes use of modern compiler features and
 7637      still retains old compiler behavior for those that run older versions
 7638      of the OS.  The shared library support part includes a variant that
 7639      uses the RPATH feature, and is available through the special
 7640      configuration target "alpha-cc-rpath", which will never be selected
 7641      automatically.
 7642      [Tim Mooney <mooney@dogbert.cc.ndsu.NoDak.edu> via Richard Levitte]
 7643 
 7644   *) In ssl3_get_key_exchange (ssl/s3_clnt.c), call ssl3_get_message()
 7645      with the same message size as in ssl3_get_certificate_request().
 7646      Otherwise, if no ServerKeyExchange message occurs, CertificateRequest
 7647      messages might inadvertently be reject as too long.
 7648      [Petr Lampa <lampa@fee.vutbr.cz>]
 7649 
 7650   *) Enhanced support for IA-64 Unix platforms (well, Linux and HP-UX).
 7651      [Andy Polyakov]
 7652 
 7653   *) Modified SSL library such that the verify_callback that has been set
 7654      specificly for an SSL object with SSL_set_verify() is actually being
 7655      used. Before the change, a verify_callback set with this function was
 7656      ignored and the verify_callback() set in the SSL_CTX at the time of
 7657      the call was used. New function X509_STORE_CTX_set_verify_cb() introduced
 7658      to allow the necessary settings.
 7659      [Lutz Jaenicke]
 7660 
 7661   *) Initialize static variable in crypto/dsa/dsa_lib.c and crypto/dh/dh_lib.c
 7662      explicitly to NULL, as at least on Solaris 8 this seems not always to be
 7663      done automatically (in contradiction to the requirements of the C
 7664      standard). This made problems when used from OpenSSH.
 7665      [Lutz Jaenicke]
 7666 
 7667   *) In OpenSSL 0.9.6a and 0.9.6b, crypto/dh/dh_key.c ignored
 7668      dh->length and always used
 7669 
 7670           BN_rand_range(priv_key, dh->p).
 7671 
 7672      BN_rand_range() is not necessary for Diffie-Hellman, and this
 7673      specific range makes Diffie-Hellman unnecessarily inefficient if
 7674      dh->length (recommended exponent length) is much smaller than the
 7675      length of dh->p.  We could use BN_rand_range() if the order of
 7676      the subgroup was stored in the DH structure, but we only have
 7677      dh->length.
 7678 
 7679      So switch back to
 7680 
 7681           BN_rand(priv_key, l, ...)
 7682 
 7683      where 'l' is dh->length if this is defined, or BN_num_bits(dh->p)-1
 7684      otherwise.
 7685      [Bodo Moeller]
 7686 
 7687   *) In
 7688 
 7689           RSA_eay_public_encrypt
 7690           RSA_eay_private_decrypt
 7691           RSA_eay_private_encrypt (signing)
 7692           RSA_eay_public_decrypt (signature verification)
 7693 
 7694      (default implementations for RSA_public_encrypt,
 7695      RSA_private_decrypt, RSA_private_encrypt, RSA_public_decrypt),
 7696      always reject numbers >= n.
 7697      [Bodo Moeller]
 7698 
 7699   *) In crypto/rand/md_rand.c, use a new short-time lock CRYPTO_LOCK_RAND2
 7700      to synchronize access to 'locking_thread'.  This is necessary on
 7701      systems where access to 'locking_thread' (an 'unsigned long'
 7702      variable) is not atomic.
 7703      [Bodo Moeller]
 7704 
 7705   *) In crypto/rand/md_rand.c, set 'locking_thread' to current thread's ID
 7706      *before* setting the 'crypto_lock_rand' flag.  The previous code had
 7707      a race condition if 0 is a valid thread ID.
 7708      [Travis Vitek <vitek@roguewave.com>]
 7709 
 7710   *) Add support for shared libraries under Irix.
 7711      [Albert Chin-A-Young <china@thewrittenword.com>]
 7712 
 7713   *) Add configuration option to build on Linux on both big-endian and
 7714      little-endian MIPS.
 7715      [Ralf Baechle <ralf@uni-koblenz.de>]
 7716 
 7717   *) Add the possibility to create shared libraries on HP-UX.
 7718      [Richard Levitte]
 7719 
 7720  Changes between 0.9.6a and 0.9.6b  [9 Jul 2001]
 7721 
 7722   *) Change ssleay_rand_bytes (crypto/rand/md_rand.c)
 7723      to avoid a SSLeay/OpenSSL PRNG weakness pointed out by
 7724      Markku-Juhani O. Saarinen <markku-juhani.saarinen@nokia.com>:
 7725      PRNG state recovery was possible based on the output of
 7726      one PRNG request appropriately sized to gain knowledge on
 7727      'md' followed by enough consecutive 1-byte PRNG requests
 7728      to traverse all of 'state'.
 7729 
 7730      1. When updating 'md_local' (the current thread's copy of 'md')
 7731         during PRNG output generation, hash all of the previous
 7732         'md_local' value, not just the half used for PRNG output.
 7733 
 7734      2. Make the number of bytes from 'state' included into the hash
 7735         independent from the number of PRNG bytes requested.
 7736 
 7737      The first measure alone would be sufficient to avoid
 7738      Markku-Juhani's attack.  (Actually it had never occurred
 7739      to me that the half of 'md_local' used for chaining was the
 7740      half from which PRNG output bytes were taken -- I had always
 7741      assumed that the secret half would be used.)  The second
 7742      measure makes sure that additional data from 'state' is never
 7743      mixed into 'md_local' in small portions; this heuristically
 7744      further strengthens the PRNG.
 7745      [Bodo Moeller]
 7746 
 7747   *) Fix crypto/bn/asm/mips3.s.
 7748      [Andy Polyakov]
 7749 
 7750   *) When only the key is given to "enc", the IV is undefined. Print out
 7751      an error message in this case.
 7752      [Lutz Jaenicke]
 7753 
 7754   *) Handle special case when X509_NAME is empty in X509 printing routines.
 7755      [Steve Henson]
 7756 
 7757   *) In dsa_do_verify (crypto/dsa/dsa_ossl.c), verify that r and s are
 7758      positive and less than q.
 7759      [Bodo Moeller]
 7760 
 7761   *) Don't change *pointer in CRYPTO_add_lock() is add_lock_callback is
 7762      used: it isn't thread safe and the add_lock_callback should handle
 7763      that itself.
 7764      [Paul Rose <Paul.Rose@bridge.com>]
 7765 
 7766   *) Verify that incoming data obeys the block size in
 7767      ssl3_enc (ssl/s3_enc.c) and tls1_enc (ssl/t1_enc.c).
 7768      [Bodo Moeller]
 7769 
 7770   *) Fix OAEP check.
 7771      [Ulf Möller, Bodo Möller]
 7772 
 7773   *) The countermeasure against Bleichbacher's attack on PKCS #1 v1.5
 7774      RSA encryption was accidentally removed in s3_srvr.c in OpenSSL 0.9.5
 7775      when fixing the server behaviour for backwards-compatible 'client
 7776      hello' messages.  (Note that the attack is impractical against
 7777      SSL 3.0 and TLS 1.0 anyway because length and version checking
 7778      means that the probability of guessing a valid ciphertext is
 7779      around 2^-40; see section 5 in Bleichenbacher's CRYPTO '98
 7780      paper.)
 7781 
 7782      Before 0.9.5, the countermeasure (hide the error by generating a
 7783      random 'decryption result') did not work properly because
 7784      ERR_clear_error() was missing, meaning that SSL_get_error() would
 7785      detect the supposedly ignored error.
 7786 
 7787      Both problems are now fixed.
 7788      [Bodo Moeller]
 7789 
 7790   *) In crypto/bio/bf_buff.c, increase DEFAULT_BUFFER_SIZE to 4096
 7791      (previously it was 1024).
 7792      [Bodo Moeller]
 7793 
 7794   *) Fix for compatibility mode trust settings: ignore trust settings
 7795      unless some valid trust or reject settings are present.
 7796      [Steve Henson]
 7797 
 7798   *) Fix for blowfish EVP: its a variable length cipher.
 7799      [Steve Henson]
 7800 
 7801   *) Fix various bugs related to DSA S/MIME verification. Handle missing
 7802      parameters in DSA public key structures and return an error in the
 7803      DSA routines if parameters are absent.
 7804      [Steve Henson]
 7805 
 7806   *) In versions up to 0.9.6, RAND_file_name() resorted to file ".rnd"
 7807      in the current directory if neither $RANDFILE nor $HOME was set.
 7808      RAND_file_name() in 0.9.6a returned NULL in this case.  This has
 7809      caused some confusion to Windows users who haven't defined $HOME.
 7810      Thus RAND_file_name() is changed again: e_os.h can define a
 7811      DEFAULT_HOME, which will be used if $HOME is not set.
 7812      For Windows, we use "C:"; on other platforms, we still require
 7813      environment variables.
 7814 
 7815   *) Move 'if (!initialized) RAND_poll()' into regions protected by
 7816      CRYPTO_LOCK_RAND.  This is not strictly necessary, but avoids
 7817      having multiple threads call RAND_poll() concurrently.
 7818      [Bodo Moeller]
 7819 
 7820   *) In crypto/rand/md_rand.c, replace 'add_do_not_lock' flag by a
 7821      combination of a flag and a thread ID variable.
 7822      Otherwise while one thread is in ssleay_rand_bytes (which sets the
 7823      flag), *other* threads can enter ssleay_add_bytes without obeying
 7824      the CRYPTO_LOCK_RAND lock (and may even illegally release the lock
 7825      that they do not hold after the first thread unsets add_do_not_lock).
 7826      [Bodo Moeller]
 7827 
 7828   *) Change bctest again: '-x' expressions are not available in all
 7829      versions of 'test'.
 7830      [Bodo Moeller]
 7831 
 7832  Changes between 0.9.6 and 0.9.6a  [5 Apr 2001]
 7833 
 7834   *) Fix a couple of memory leaks in PKCS7_dataDecode()
 7835      [Steve Henson, reported by Heyun Zheng <hzheng@atdsprint.com>]
 7836 
 7837   *) Change Configure and Makefiles to provide EXE_EXT, which will contain
 7838      the default extension for executables, if any.  Also, make the perl
 7839      scripts that use symlink() to test if it really exists and use "cp"
 7840      if it doesn't.  All this made OpenSSL compilable and installable in
 7841      CygWin.
 7842      [Richard Levitte]
 7843 
 7844   *) Fix for asn1_GetSequence() for indefinite length constructed data.
 7845      If SEQUENCE is length is indefinite just set c->slen to the total
 7846      amount of data available.
 7847      [Steve Henson, reported by shige@FreeBSD.org]
 7848      [This change does not apply to 0.9.7.]
 7849 
 7850   *) Change bctest to avoid here-documents inside command substitution
 7851      (workaround for FreeBSD /bin/sh bug).
 7852      For compatibility with Ultrix, avoid shell functions (introduced
 7853      in the bctest version that searches along $PATH).
 7854      [Bodo Moeller]
 7855 
 7856   *) Rename 'des_encrypt' to 'des_encrypt1'.  This avoids the clashes
 7857      with des_encrypt() defined on some operating systems, like Solaris
 7858      and UnixWare.
 7859      [Richard Levitte]
 7860 
 7861   *) Check the result of RSA-CRT (see D. Boneh, R. DeMillo, R. Lipton:
 7862      On the Importance of Eliminating Errors in Cryptographic
 7863      Computations, J. Cryptology 14 (2001) 2, 101-119,
 7864      http://theory.stanford.edu/~dabo/papers/faults.ps.gz).
 7865      [Ulf Moeller]
 7866   
 7867   *) MIPS assembler BIGNUM division bug fix. 
 7868      [Andy Polyakov]
 7869 
 7870   *) Disabled incorrect Alpha assembler code.
 7871      [Richard Levitte]
 7872 
 7873   *) Fix PKCS#7 decode routines so they correctly update the length
 7874      after reading an EOC for the EXPLICIT tag.
 7875      [Steve Henson]
 7876      [This change does not apply to 0.9.7.]
 7877 
 7878   *) Fix bug in PKCS#12 key generation routines. This was triggered
 7879      if a 3DES key was generated with a 0 initial byte. Include
 7880      PKCS12_BROKEN_KEYGEN compilation option to retain the old
 7881      (but broken) behaviour.
 7882      [Steve Henson]
 7883 
 7884   *) Enhance bctest to search for a working bc along $PATH and print
 7885      it when found.
 7886      [Tim Rice <tim@multitalents.net> via Richard Levitte]
 7887 
 7888   *) Fix memory leaks in err.c: free err_data string if necessary;
 7889      don't write to the wrong index in ERR_set_error_data.
 7890      [Bodo Moeller]
 7891 
 7892   *) Implement ssl23_peek (analogous to ssl23_read), which previously
 7893      did not exist.
 7894      [Bodo Moeller]
 7895 
 7896   *) Replace rdtsc with _emit statements for VC++ version 5.
 7897      [Jeremy Cooper <jeremy@baymoo.org>]
 7898 
 7899   *) Make it possible to reuse SSLv2 sessions.
 7900      [Richard Levitte]
 7901 
 7902   *) In copy_email() check for >= 0 as a return value for
 7903      X509_NAME_get_index_by_NID() since 0 is a valid index.
 7904      [Steve Henson reported by Massimiliano Pala <madwolf@opensca.org>]
 7905 
 7906   *) Avoid coredump with unsupported or invalid public keys by checking if
 7907      X509_get_pubkey() fails in PKCS7_verify(). Fix memory leak when
 7908      PKCS7_verify() fails with non detached data.
 7909      [Steve Henson]
 7910 
 7911   *) Don't use getenv in library functions when run as setuid/setgid.
 7912      New function OPENSSL_issetugid().
 7913      [Ulf Moeller]
 7914 
 7915   *) Avoid false positives in memory leak detection code (crypto/mem_dbg.c)
 7916      due to incorrect handling of multi-threading:
 7917 
 7918      1. Fix timing glitch in the MemCheck_off() portion of CRYPTO_mem_ctrl().
 7919 
 7920      2. Fix logical glitch in is_MemCheck_on() aka CRYPTO_is_mem_check_on().
 7921 
 7922      3. Count how many times MemCheck_off() has been called so that
 7923         nested use can be treated correctly.  This also avoids 
 7924         inband-signalling in the previous code (which relied on the
 7925         assumption that thread ID 0 is impossible).
 7926      [Bodo Moeller]
 7927 
 7928   *) Add "-rand" option also to s_client and s_server.
 7929      [Lutz Jaenicke]
 7930 
 7931   *) Fix CPU detection on Irix 6.x.
 7932      [Kurt Hockenbury <khockenb@stevens-tech.edu> and
 7933       "Bruce W. Forsberg" <bruce.forsberg@baesystems.com>]
 7934 
 7935   *) Fix X509_NAME bug which produced incorrect encoding if X509_NAME
 7936      was empty.
 7937      [Steve Henson]
 7938      [This change does not apply to 0.9.7.]
 7939 
 7940   *) Use the cached encoding of an X509_NAME structure rather than
 7941      copying it. This is apparently the reason for the libsafe "errors"
 7942      but the code is actually correct.
 7943      [Steve Henson]
 7944 
 7945   *) Add new function BN_rand_range(), and fix DSA_sign_setup() to prevent
 7946      Bleichenbacher's DSA attack.
 7947      Extend BN_[pseudo_]rand: As before, top=1 forces the highest two bits
 7948      to be set and top=0 forces the highest bit to be set; top=-1 is new
 7949      and leaves the highest bit random.
 7950      [Ulf Moeller, Bodo Moeller]
 7951 
 7952   *) In the NCONF_...-based implementations for CONF_... queries
 7953      (crypto/conf/conf_lib.c), if the input LHASH is NULL, avoid using
 7954      a temporary CONF structure with the data component set to NULL
 7955      (which gives segmentation faults in lh_retrieve).
 7956      Instead, use NULL for the CONF pointer in CONF_get_string and
 7957      CONF_get_number (which may use environment variables) and directly
 7958      return NULL from CONF_get_section.
 7959      [Bodo Moeller]
 7960 
 7961   *) Fix potential buffer overrun for EBCDIC.
 7962      [Ulf Moeller]
 7963 
 7964   *) Tolerate nonRepudiation as being valid for S/MIME signing and certSign
 7965      keyUsage if basicConstraints absent for a CA.
 7966      [Steve Henson]
 7967 
 7968   *) Make SMIME_write_PKCS7() write mail header values with a format that
 7969      is more generally accepted (no spaces before the semicolon), since
 7970      some programs can't parse those values properly otherwise.  Also make
 7971      sure BIO's that break lines after each write do not create invalid
 7972      headers.
 7973      [Richard Levitte]
 7974 
 7975   *) Make the CRL encoding routines work with empty SEQUENCE OF. The
 7976      macros previously used would not encode an empty SEQUENCE OF
 7977      and break the signature.
 7978      [Steve Henson]
 7979      [This change does not apply to 0.9.7.]
 7980 
 7981   *) Zero the premaster secret after deriving the master secret in
 7982      DH ciphersuites.
 7983      [Steve Henson]
 7984 
 7985   *) Add some EVP_add_digest_alias registrations (as found in
 7986      OpenSSL_add_all_digests()) to SSL_library_init()
 7987      aka OpenSSL_add_ssl_algorithms().  This provides improved
 7988      compatibility with peers using X.509 certificates
 7989      with unconventional AlgorithmIdentifier OIDs.
 7990      [Bodo Moeller]
 7991 
 7992   *) Fix for Irix with NO_ASM.
 7993      ["Bruce W. Forsberg" <bruce.forsberg@baesystems.com>]
 7994 
 7995   *) ./config script fixes.
 7996      [Ulf Moeller, Richard Levitte]
 7997 
 7998   *) Fix 'openssl passwd -1'.
 7999      [Bodo Moeller]
 8000 
 8001   *) Change PKCS12_key_gen_asc() so it can cope with non null
 8002      terminated strings whose length is passed in the passlen
 8003      parameter, for example from PEM callbacks. This was done
 8004      by adding an extra length parameter to asc2uni().
 8005      [Steve Henson, reported by <oddissey@samsung.co.kr>]
 8006 
 8007   *) Fix C code generated by 'openssl dsaparam -C': If a BN_bin2bn
 8008      call failed, free the DSA structure.
 8009      [Bodo Moeller]
 8010 
 8011   *) Fix to uni2asc() to cope with zero length Unicode strings.
 8012      These are present in some PKCS#12 files.
 8013      [Steve Henson]
 8014 
 8015   *) Increase s2->wbuf allocation by one byte in ssl2_new (ssl/s2_lib.c).
 8016      Otherwise do_ssl_write (ssl/s2_pkt.c) will write beyond buffer limits
 8017      when writing a 32767 byte record.
 8018      [Bodo Moeller; problem reported by Eric Day <eday@concentric.net>]
 8019 
 8020   *) In RSA_eay_public_{en,ed}crypt and RSA_eay_mod_exp (rsa_eay.c),
 8021      obtain lock CRYPTO_LOCK_RSA before setting rsa->_method_mod_{n,p,q}.
 8022 
 8023      (RSA objects have a reference count access to which is protected
 8024      by CRYPTO_LOCK_RSA [see rsa_lib.c, s3_srvr.c, ssl_cert.c, ssl_rsa.c],
 8025      so they are meant to be shared between threads.)
 8026      [Bodo Moeller, Geoff Thorpe; original patch submitted by
 8027      "Reddie, Steven" <Steven.Reddie@ca.com>]
 8028 
 8029   *) Fix a deadlock in CRYPTO_mem_leaks().
 8030      [Bodo Moeller]
 8031 
 8032   *) Use better test patterns in bntest.
 8033      [Ulf Möller]
 8034 
 8035   *) rand_win.c fix for Borland C.
 8036      [Ulf Möller]
 8037  
 8038   *) BN_rshift bugfix for n == 0.
 8039      [Bodo Moeller]
 8040 
 8041   *) Add a 'bctest' script that checks for some known 'bc' bugs
 8042      so that 'make test' does not abort just because 'bc' is broken.
 8043      [Bodo Moeller]
 8044 
 8045   *) Store verify_result within SSL_SESSION also for client side to
 8046      avoid potential security hole. (Re-used sessions on the client side
 8047      always resulted in verify_result==X509_V_OK, not using the original
 8048      result of the server certificate verification.)
 8049      [Lutz Jaenicke]
 8050 
 8051   *) Fix ssl3_pending: If the record in s->s3->rrec is not of type
 8052      SSL3_RT_APPLICATION_DATA, return 0.
 8053      Similarly, change ssl2_pending to return 0 if SSL_in_init(s) is true.
 8054      [Bodo Moeller]
 8055 
 8056   *) Fix SSL_peek:
 8057      Both ssl2_peek and ssl3_peek, which were totally broken in earlier
 8058      releases, have been re-implemented by renaming the previous
 8059      implementations of ssl2_read and ssl3_read to ssl2_read_internal
 8060      and ssl3_read_internal, respectively, and adding 'peek' parameters
 8061      to them.  The new ssl[23]_{read,peek} functions are calls to
 8062      ssl[23]_read_internal with the 'peek' flag set appropriately.
 8063      A 'peek' parameter has also been added to ssl3_read_bytes, which
 8064      does the actual work for ssl3_read_internal.
 8065      [Bodo Moeller]
 8066 
 8067   *) Initialise "ex_data" member of RSA/DSA/DH structures prior to calling
 8068      the method-specific "init()" handler. Also clean up ex_data after
 8069      calling the method-specific "finish()" handler. Previously, this was
 8070      happening the other way round.
 8071      [Geoff Thorpe]
 8072 
 8073   *) Increase BN_CTX_NUM (the number of BIGNUMs in a BN_CTX) to 16.
 8074      The previous value, 12, was not always sufficient for BN_mod_exp().
 8075      [Bodo Moeller]
 8076 
 8077   *) Make sure that shared libraries get the internal name engine with
 8078      the full version number and not just 0.  This should mark the
 8079      shared libraries as not backward compatible.  Of course, this should
 8080      be changed again when we can guarantee backward binary compatibility.
 8081      [Richard Levitte]
 8082 
 8083   *) Fix typo in get_cert_by_subject() in by_dir.c
 8084      [Jean-Marc Desperrier <jean-marc.desperrier@certplus.com>]
 8085 
 8086   *) Rework the system to generate shared libraries:
 8087 
 8088      - Make note of the expected extension for the shared libraries and
 8089        if there is a need for symbolic links from for example libcrypto.so.0
 8090        to libcrypto.so.0.9.7.  There is extended info in Configure for
 8091        that.
 8092 
 8093      - Make as few rebuilds of the shared libraries as possible.
 8094 
 8095      - Still avoid linking the OpenSSL programs with the shared libraries.
 8096 
 8097      - When installing, install the shared libraries separately from the
 8098        static ones.
 8099      [Richard Levitte]
 8100 
 8101   *) Fix SSL_CTX_set_read_ahead macro to actually use its argument.
 8102 
 8103      Copy SSL_CTX's read_ahead flag to SSL object directly in SSL_new
 8104      and not in SSL_clear because the latter is also used by the
 8105      accept/connect functions; previously, the settings made by
 8106      SSL_set_read_ahead would be lost during the handshake.
 8107      [Bodo Moeller; problems reported by Anders Gertz <gertz@epact.se>]     
 8108 
 8109   *) Correct util/mkdef.pl to be selective about disabled algorithms.
 8110      Previously, it would create entries for disableed algorithms no
 8111      matter what.
 8112      [Richard Levitte]
 8113 
 8114   *) Added several new manual pages for SSL_* function.
 8115      [Lutz Jaenicke]
 8116 
 8117  Changes between 0.9.5a and 0.9.6  [24 Sep 2000]
 8118 
 8119   *) In ssl23_get_client_hello, generate an error message when faced
 8120      with an initial SSL 3.0/TLS record that is too small to contain the
 8121      first two bytes of the ClientHello message, i.e. client_version.
 8122      (Note that this is a pathologic case that probably has never happened
 8123      in real life.)  The previous approach was to use the version number
 8124      from the record header as a substitute; but our protocol choice
 8125      should not depend on that one because it is not authenticated
 8126      by the Finished messages.
 8127      [Bodo Moeller]
 8128 
 8129   *) More robust randomness gathering functions for Windows.
 8130      [Jeffrey Altman <jaltman@columbia.edu>]
 8131 
 8132   *) For compatibility reasons if the flag X509_V_FLAG_ISSUER_CHECK is
 8133      not set then we don't setup the error code for issuer check errors
 8134      to avoid possibly overwriting other errors which the callback does
 8135      handle. If an application does set the flag then we assume it knows
 8136      what it is doing and can handle the new informational codes
 8137      appropriately.
 8138      [Steve Henson]
 8139 
 8140   *) Fix for a nasty bug in ASN1_TYPE handling. ASN1_TYPE is used for
 8141      a general "ANY" type, as such it should be able to decode anything
 8142      including tagged types. However it didn't check the class so it would
 8143      wrongly interpret tagged types in the same way as their universal
 8144      counterpart and unknown types were just rejected. Changed so that the
 8145      tagged and unknown types are handled in the same way as a SEQUENCE:
 8146      that is the encoding is stored intact. There is also a new type
 8147      "V_ASN1_OTHER" which is used when the class is not universal, in this
 8148      case we have no idea what the actual type is so we just lump them all
 8149      together.
 8150      [Steve Henson]
 8151 
 8152   *) On VMS, stdout may very well lead to a file that is written to
 8153      in a record-oriented fashion.  That means that every write() will
 8154      write a separate record, which will be read separately by the
 8155      programs trying to read from it.  This can be very confusing.
 8156 
 8157      The solution is to put a BIO filter in the way that will buffer
 8158      text until a linefeed is reached, and then write everything a
 8159      line at a time, so every record written will be an actual line,
 8160      not chunks of lines and not (usually doesn't happen, but I've
 8161      seen it once) several lines in one record.  BIO_f_linebuffer() is
 8162      the answer.
 8163 
 8164      Currently, it's a VMS-only method, because that's where it has
 8165      been tested well enough.
 8166      [Richard Levitte]
 8167 
 8168   *) Remove 'optimized' squaring variant in BN_mod_mul_montgomery,
 8169      it can return incorrect results.
 8170      (Note: The buggy variant was not enabled in OpenSSL 0.9.5a,
 8171      but it was in 0.9.6-beta[12].)
 8172      [Bodo Moeller]
 8173 
 8174   *) Disable the check for content being present when verifying detached
 8175      signatures in pk7_smime.c. Some versions of Netscape (wrongly)
 8176      include zero length content when signing messages.
 8177      [Steve Henson]
 8178 
 8179   *) New BIO_shutdown_wr macro, which invokes the BIO_C_SHUTDOWN_WR
 8180      BIO_ctrl (for BIO pairs).
 8181      [Bodo Möller]
 8182 
 8183   *) Add DSO method for VMS.
 8184      [Richard Levitte]
 8185 
 8186   *) Bug fix: Montgomery multiplication could produce results with the
 8187      wrong sign.
 8188      [Ulf Möller]
 8189 
 8190   *) Add RPM specification openssl.spec and modify it to build three
 8191      packages.  The default package contains applications, application
 8192      documentation and run-time libraries.  The devel package contains
 8193      include files, static libraries and function documentation.  The
 8194      doc package contains the contents of the doc directory.  The original
 8195      openssl.spec was provided by Damien Miller <djm@mindrot.org>.
 8196      [Richard Levitte]
 8197      
 8198   *) Add a large number of documentation files for many SSL routines.
 8199      [Lutz Jaenicke <Lutz.Jaenicke@aet.TU-Cottbus.DE>]
 8200 
 8201   *) Add a configuration entry for Sony News 4.
 8202      [NAKAJI Hiroyuki <nakaji@tutrp.tut.ac.jp>]
 8203 
 8204   *) Don't set the two most significant bits to one when generating a
 8205      random number < q in the DSA library.
 8206      [Ulf Möller]
 8207 
 8208   *) New SSL API mode 'SSL_MODE_AUTO_RETRY'.  This disables the default
 8209      behaviour that SSL_read may result in SSL_ERROR_WANT_READ (even if
 8210      the underlying transport is blocking) if a handshake took place.
 8211      (The default behaviour is needed by applications such as s_client
 8212      and s_server that use select() to determine when to use SSL_read;
 8213      but for applications that know in advance when to expect data, it
 8214      just makes things more complicated.)
 8215      [Bodo Moeller]
 8216 
 8217   *) Add RAND_egd_bytes(), which gives control over the number of bytes read
 8218      from EGD.
 8219      [Ben Laurie]
 8220 
 8221   *) Add a few more EBCDIC conditionals that make `req' and `x509'
 8222      work better on such systems.
 8223      [Martin Kraemer <Martin.Kraemer@MchP.Siemens.De>]
 8224 
 8225   *) Add two demo programs for PKCS12_parse() and PKCS12_create().
 8226      Update PKCS12_parse() so it copies the friendlyName and the
 8227      keyid to the certificates aux info.
 8228      [Steve Henson]
 8229 
 8230   *) Fix bug in PKCS7_verify() which caused an infinite loop
 8231      if there was more than one signature.
 8232      [Sven Uszpelkat <su@celocom.de>]
 8233 
 8234   *) Major change in util/mkdef.pl to include extra information
 8235      about each symbol, as well as presentig variables as well
 8236      as functions.  This change means that there's n more need
 8237      to rebuild the .num files when some algorithms are excluded.
 8238      [Richard Levitte]
 8239 
 8240   *) Allow the verify time to be set by an application,
 8241      rather than always using the current time.
 8242      [Steve Henson]
 8243   
 8244   *) Phase 2 verify code reorganisation. The certificate
 8245      verify code now looks up an issuer certificate by a
 8246      number of criteria: subject name, authority key id
 8247      and key usage. It also verifies self signed certificates
 8248      by the same criteria. The main comparison function is
 8249      X509_check_issued() which performs these checks.
 8250  
 8251      Lot of changes were necessary in order to support this
 8252      without completely rewriting the lookup code.
 8253  
 8254      Authority and subject key identifier are now cached.
 8255  
 8256      The LHASH 'certs' is X509_STORE has now been replaced
 8257      by a STACK_OF(X509_OBJECT). This is mainly because an
 8258      LHASH can't store or retrieve multiple objects with
 8259      the same hash value.
 8260 
 8261      As a result various functions (which were all internal
 8262      use only) have changed to handle the new X509_STORE
 8263      structure. This will break anything that messed round
 8264      with X509_STORE internally.
 8265  
 8266      The functions X509_STORE_add_cert() now checks for an
 8267      exact match, rather than just subject name.
 8268  
 8269      The X509_STORE API doesn't directly support the retrieval
 8270      of multiple certificates matching a given criteria, however
 8271      this can be worked round by performing a lookup first
 8272      (which will fill the cache with candidate certificates)
 8273      and then examining the cache for matches. This is probably
 8274      the best we can do without throwing out X509_LOOKUP
 8275      entirely (maybe later...).
 8276  
 8277      The X509_VERIFY_CTX structure has been enhanced considerably.
 8278  
 8279      All certificate lookup operations now go via a get_issuer()
 8280      callback. Although this currently uses an X509_STORE it
 8281      can be replaced by custom lookups. This is a simple way
 8282      to bypass the X509_STORE hackery necessary to make this
 8283      work and makes it possible to use more efficient techniques
 8284      in future. A very simple version which uses a simple
 8285      STACK for its trusted certificate store is also provided
 8286      using X509_STORE_CTX_trusted_stack().
 8287  
 8288      The verify_cb() and verify() callbacks now have equivalents
 8289      in the X509_STORE_CTX structure.
 8290  
 8291      X509_STORE_CTX also has a 'flags' field which can be used
 8292      to customise the verify behaviour.
 8293      [Steve Henson]
 8294  
 8295   *) Add new PKCS#7 signing option PKCS7_NOSMIMECAP which 
 8296      excludes S/MIME capabilities.
 8297      [Steve Henson]
 8298 
 8299   *) When a certificate request is read in keep a copy of the
 8300      original encoding of the signed data and use it when outputing
 8301      again. Signatures then use the original encoding rather than
 8302      a decoded, encoded version which may cause problems if the
 8303      request is improperly encoded.
 8304      [Steve Henson]
 8305 
 8306   *) For consistency with other BIO_puts implementations, call
 8307      buffer_write(b, ...) directly in buffer_puts instead of calling
 8308      BIO_write(b, ...).
 8309 
 8310      In BIO_puts, increment b->num_write as in BIO_write.
 8311      [Peter.Sylvester@EdelWeb.fr]
 8312 
 8313   *) Fix BN_mul_word for the case where the word is 0. (We have to use
 8314      BN_zero, we may not return a BIGNUM with an array consisting of
 8315      words set to zero.)
 8316      [Bodo Moeller]
 8317 
 8318   *) Avoid calling abort() from within the library when problems are
 8319      detected, except if preprocessor symbols have been defined
 8320      (such as REF_CHECK, BN_DEBUG etc.).
 8321      [Bodo Moeller]
 8322 
 8323   *) New openssl application 'rsautl'. This utility can be
 8324      used for low level RSA operations. DER public key
 8325      BIO/fp routines also added.
 8326      [Steve Henson]
 8327 
 8328   *) New Configure entry and patches for compiling on QNX 4.
 8329      [Andreas Schneider <andreas@ds3.etech.fh-hamburg.de>]
 8330 
 8331   *) A demo state-machine implementation was sponsored by
 8332      Nuron (http://www.nuron.com/) and is now available in
 8333      demos/state_machine.
 8334      [Ben Laurie]
 8335 
 8336   *) New options added to the 'dgst' utility for signature
 8337      generation and verification.
 8338      [Steve Henson]
 8339 
 8340   *) Unrecognized PKCS#7 content types are now handled via a
 8341      catch all ASN1_TYPE structure. This allows unsupported
 8342      types to be stored as a "blob" and an application can
 8343      encode and decode it manually.
 8344      [Steve Henson]
 8345 
 8346   *) Fix various signed/unsigned issues to make a_strex.c
 8347      compile under VC++.
 8348      [Oscar Jacobsson <oscar.jacobsson@celocom.com>]
 8349 
 8350   *) ASN1 fixes. i2d_ASN1_OBJECT was not returning the correct
 8351      length if passed a buffer. ASN1_INTEGER_to_BN failed
 8352      if passed a NULL BN and its argument was negative.
 8353      [Steve Henson, pointed out by Sven Heiberg <sven@tartu.cyber.ee>]
 8354 
 8355   *) Modification to PKCS#7 encoding routines to output definite
 8356      length encoding. Since currently the whole structures are in
 8357      memory there's not real point in using indefinite length 
 8358      constructed encoding. However if OpenSSL is compiled with
 8359      the flag PKCS7_INDEFINITE_ENCODING the old form is used.
 8360      [Steve Henson]
 8361 
 8362   *) Added BIO_vprintf() and BIO_vsnprintf().
 8363      [Richard Levitte]
 8364 
 8365   *) Added more prefixes to parse for in the the strings written
 8366      through a logging bio, to cover all the levels that are available
 8367      through syslog.  The prefixes are now:
 8368 
 8369 	PANIC, EMERG, EMR	=>	LOG_EMERG
 8370 	ALERT, ALR		=>	LOG_ALERT
 8371 	CRIT, CRI		=>	LOG_CRIT
 8372 	ERROR, ERR		=>	LOG_ERR
 8373 	WARNING, WARN, WAR	=>	LOG_WARNING
 8374 	NOTICE, NOTE, NOT	=>	LOG_NOTICE
 8375 	INFO, INF		=>	LOG_INFO
 8376 	DEBUG, DBG		=>	LOG_DEBUG
 8377 
 8378      and as before, if none of those prefixes are present at the
 8379      beginning of the string, LOG_ERR is chosen.
 8380 
 8381      On Win32, the LOG_* levels are mapped according to this:
 8382 
 8383 	LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR	=> EVENTLOG_ERROR_TYPE
 8384 	LOG_WARNING				=> EVENTLOG_WARNING_TYPE
 8385 	LOG_NOTICE, LOG_INFO, LOG_DEBUG		=> EVENTLOG_INFORMATION_TYPE
 8386 
 8387      [Richard Levitte]
 8388 
 8389   *) Made it possible to reconfigure with just the configuration
 8390      argument "reconf" or "reconfigure".  The command line arguments
 8391      are stored in Makefile.ssl in the variable CONFIGURE_ARGS,
 8392      and are retrieved from there when reconfiguring.
 8393      [Richard Levitte]
 8394 
 8395   *) MD4 implemented.
 8396      [Assar Westerlund <assar@sics.se>, Richard Levitte]
 8397 
 8398   *) Add the arguments -CAfile and -CApath to the pkcs12 utility.
 8399      [Richard Levitte]
 8400 
 8401   *) The obj_dat.pl script was messing up the sorting of object
 8402      names. The reason was that it compared the quoted version
 8403      of strings as a result "OCSP" > "OCSP Signing" because
 8404      " > SPACE. Changed script to store unquoted versions of
 8405      names and add quotes on output. It was also omitting some
 8406      names from the lookup table if they were given a default
 8407      value (that is if SN is missing it is given the same
 8408      value as LN and vice versa), these are now added on the
 8409      grounds that if an object has a name we should be able to
 8410      look it up. Finally added warning output when duplicate
 8411      short or long names are found.
 8412      [Steve Henson]
 8413 
 8414   *) Changes needed for Tandem NSK.
 8415      [Scott Uroff <scott@xypro.com>]
 8416 
 8417   *) Fix SSL 2.0 rollback checking: Due to an off-by-one error in
 8418      RSA_padding_check_SSLv23(), special padding was never detected
 8419      and thus the SSL 3.0/TLS 1.0 countermeasure against protocol
 8420      version rollback attacks was not effective.
 8421 
 8422      In s23_clnt.c, don't use special rollback-attack detection padding
 8423      (RSA_SSLV23_PADDING) if SSL 2.0 is the only protocol enabled in the
 8424      client; similarly, in s23_srvr.c, don't do the rollback check if
 8425      SSL 2.0 is the only protocol enabled in the server.
 8426      [Bodo Moeller]
 8427 
 8428   *) Make it possible to get hexdumps of unprintable data with 'openssl
 8429      asn1parse'.  By implication, the functions ASN1_parse_dump() and
 8430      BIO_dump_indent() are added.
 8431      [Richard Levitte]
 8432 
 8433   *) New functions ASN1_STRING_print_ex() and X509_NAME_print_ex()
 8434      these print out strings and name structures based on various
 8435      flags including RFC2253 support and proper handling of
 8436      multibyte characters. Added options to the 'x509' utility 
 8437      to allow the various flags to be set.
 8438      [Steve Henson]
 8439 
 8440   *) Various fixes to use ASN1_TIME instead of ASN1_UTCTIME.
 8441      Also change the functions X509_cmp_current_time() and
 8442      X509_gmtime_adj() work with an ASN1_TIME structure,
 8443      this will enable certificates using GeneralizedTime in validity
 8444      dates to be checked.
 8445      [Steve Henson]
 8446 
 8447   *) Make the NEG_PUBKEY_BUG code (which tolerates invalid
 8448      negative public key encodings) on by default,
 8449      NO_NEG_PUBKEY_BUG can be set to disable it.
 8450      [Steve Henson]
 8451 
 8452   *) New function c2i_ASN1_OBJECT() which acts on ASN1_OBJECT
 8453      content octets. An i2c_ASN1_OBJECT is unnecessary because
 8454      the encoding can be trivially obtained from the structure.
 8455      [Steve Henson]
 8456 
 8457   *) crypto/err.c locking bugfix: Use write locks (CRYPTO_w_[un]lock),
 8458      not read locks (CRYPTO_r_[un]lock).
 8459      [Bodo Moeller]
 8460 
 8461   *) A first attempt at creating official support for shared
 8462      libraries through configuration.  I've kept it so the
 8463      default is static libraries only, and the OpenSSL programs
 8464      are always statically linked for now, but there are
 8465      preparations for dynamic linking in place.
 8466      This has been tested on Linux and Tru64.
 8467      [Richard Levitte]
 8468 
 8469   *) Randomness polling function for Win9x, as described in:
 8470      Peter Gutmann, Software Generation of Practically Strong
 8471      Random Numbers.
 8472      [Ulf Möller]
 8473 
 8474   *) Fix so PRNG is seeded in req if using an already existing
 8475      DSA key.
 8476      [Steve Henson]
 8477 
 8478   *) New options to smime application. -inform and -outform
 8479      allow alternative formats for the S/MIME message including
 8480      PEM and DER. The -content option allows the content to be
 8481      specified separately. This should allow things like Netscape
 8482      form signing output easier to verify.
 8483      [Steve Henson]
 8484 
 8485   *) Fix the ASN1 encoding of tags using the 'long form'.
 8486      [Steve Henson]
 8487 
 8488   *) New ASN1 functions, i2c_* and c2i_* for INTEGER and BIT
 8489      STRING types. These convert content octets to and from the
 8490      underlying type. The actual tag and length octets are
 8491      already assumed to have been read in and checked. These
 8492      are needed because all other string types have virtually
 8493      identical handling apart from the tag. By having versions
 8494      of the ASN1 functions that just operate on content octets
 8495      IMPLICIT tagging can be handled properly. It also allows
 8496      the ASN1_ENUMERATED code to be cut down because ASN1_ENUMERATED
 8497      and ASN1_INTEGER are identical apart from the tag.
 8498      [Steve Henson]
 8499 
 8500   *) Change the handling of OID objects as follows:
 8501 
 8502      - New object identifiers are inserted in objects.txt, following
 8503        the syntax given in objects.README.
 8504      - objects.pl is used to process obj_mac.num and create a new
 8505        obj_mac.h.
 8506      - obj_dat.pl is used to create a new obj_dat.h, using the data in
 8507        obj_mac.h.
 8508 
 8509      This is currently kind of a hack, and the perl code in objects.pl
 8510      isn't very elegant, but it works as I intended.  The simplest way
 8511      to check that it worked correctly is to look in obj_dat.h and
 8512      check the array nid_objs and make sure the objects haven't moved
 8513      around (this is important!).  Additions are OK, as well as
 8514      consistent name changes. 
 8515      [Richard Levitte]
 8516 
 8517   *) Add BSD-style MD5-based passwords to 'openssl passwd' (option '-1').
 8518      [Bodo Moeller]
 8519 
 8520   *) Addition of the command line parameter '-rand file' to 'openssl req'.
 8521      The given file adds to whatever has already been seeded into the
 8522      random pool through the RANDFILE configuration file option or
 8523      environment variable, or the default random state file.
 8524      [Richard Levitte]
 8525 
 8526   *) mkstack.pl now sorts each macro group into lexical order.
 8527      Previously the output order depended on the order the files
 8528      appeared in the directory, resulting in needless rewriting
 8529      of safestack.h .
 8530      [Steve Henson]
 8531 
 8532   *) Patches to make OpenSSL compile under Win32 again. Mostly
 8533      work arounds for the VC++ problem that it treats func() as
 8534      func(void). Also stripped out the parts of mkdef.pl that
 8535      added extra typesafe functions: these no longer exist.
 8536      [Steve Henson]
 8537 
 8538   *) Reorganisation of the stack code. The macros are now all 
 8539      collected in safestack.h . Each macro is defined in terms of
 8540      a "stack macro" of the form SKM_<name>(type, a, b). The 
 8541      DEBUG_SAFESTACK is now handled in terms of function casts,
 8542      this has the advantage of retaining type safety without the
 8543      use of additional functions. If DEBUG_SAFESTACK is not defined
 8544      then the non typesafe macros are used instead. Also modified the
 8545      mkstack.pl script to handle the new form. Needs testing to see
 8546      if which (if any) compilers it chokes and maybe make DEBUG_SAFESTACK
 8547      the default if no major problems. Similar behaviour for ASN1_SET_OF
 8548      and PKCS12_STACK_OF.
 8549      [Steve Henson]
 8550 
 8551   *) When some versions of IIS use the 'NET' form of private key the
 8552      key derivation algorithm is different. Normally MD5(password) is
 8553      used as a 128 bit RC4 key. In the modified case
 8554      MD5(MD5(password) + "SGCKEYSALT")  is used insted. Added some
 8555      new functions i2d_RSA_NET(), d2i_RSA_NET() etc which are the same
 8556      as the old Netscape_RSA functions except they have an additional
 8557      'sgckey' parameter which uses the modified algorithm. Also added
 8558      an -sgckey command line option to the rsa utility. Thanks to 
 8559      Adrian Peck <bertie@ncipher.com> for posting details of the modified
 8560      algorithm to openssl-dev.
 8561      [Steve Henson]
 8562 
 8563   *) The evp_local.h macros were using 'c.##kname' which resulted in
 8564      invalid expansion on some systems (SCO 5.0.5 for example).
 8565      Corrected to 'c.kname'.
 8566      [Phillip Porch <root@theporch.com>]
 8567 
 8568   *) New X509_get1_email() and X509_REQ_get1_email() functions that return
 8569      a STACK of email addresses from a certificate or request, these look
 8570      in the subject name and the subject alternative name extensions and 
 8571      omit any duplicate addresses.
 8572      [Steve Henson]
 8573 
 8574   *) Re-implement BN_mod_exp2_mont using independent (and larger) windows.
 8575      This makes DSA verification about 2 % faster.
 8576      [Bodo Moeller]
 8577 
 8578   *) Increase maximum window size in BN_mod_exp_... to 6 bits instead of 5
 8579      (meaning that now 2^5 values will be precomputed, which is only 4 KB
 8580      plus overhead for 1024 bit moduli).
 8581      This makes exponentiations about 0.5 % faster for 1024 bit
 8582      exponents (as measured by "openssl speed rsa2048").
 8583      [Bodo Moeller]
 8584 
 8585   *) Rename memory handling macros to avoid conflicts with other
 8586      software:
 8587           Malloc         =>  OPENSSL_malloc
 8588           Malloc_locked  =>  OPENSSL_malloc_locked
 8589           Realloc        =>  OPENSSL_realloc
 8590           Free           =>  OPENSSL_free
 8591      [Richard Levitte]
 8592 
 8593   *) New function BN_mod_exp_mont_word for small bases (roughly 15%
 8594      faster than BN_mod_exp_mont, i.e. 7% for a full DH exchange).
 8595      [Bodo Moeller]
 8596 
 8597   *) CygWin32 support.
 8598      [John Jarvie <jjarvie@newsguy.com>]
 8599 
 8600   *) The type-safe stack code has been rejigged. It is now only compiled
 8601      in when OpenSSL is configured with the DEBUG_SAFESTACK option and
 8602      by default all type-specific stack functions are "#define"d back to
 8603      standard stack functions. This results in more streamlined output
 8604      but retains the type-safety checking possibilities of the original
 8605      approach.
 8606      [Geoff Thorpe]
 8607 
 8608   *) The STACK code has been cleaned up, and certain type declarations
 8609      that didn't make a lot of sense have been brought in line. This has
 8610      also involved a cleanup of sorts in safestack.h to more correctly
 8611      map type-safe stack functions onto their plain stack counterparts.
 8612      This work has also resulted in a variety of "const"ifications of
 8613      lots of the code, especially "_cmp" operations which should normally
 8614      be prototyped with "const" parameters anyway.
 8615      [Geoff Thorpe]
 8616 
 8617   *) When generating bytes for the first time in md_rand.c, 'stir the pool'
 8618      by seeding with STATE_SIZE dummy bytes (with zero entropy count).
 8619      (The PRNG state consists of two parts, the large pool 'state' and 'md',
 8620      where all of 'md' is used each time the PRNG is used, but 'state'
 8621      is used only indexed by a cyclic counter. As entropy may not be
 8622      well distributed from the beginning, 'md' is important as a
 8623      chaining variable. However, the output function chains only half
 8624      of 'md', i.e. 80 bits.  ssleay_rand_add, on the other hand, chains
 8625      all of 'md', and seeding with STATE_SIZE dummy bytes will result
 8626      in all of 'state' being rewritten, with the new values depending
 8627      on virtually all of 'md'.  This overcomes the 80 bit limitation.)
 8628      [Bodo Moeller]
 8629 
 8630   *) In ssl/s2_clnt.c and ssl/s3_clnt.c, call ERR_clear_error() when
 8631      the handshake is continued after ssl_verify_cert_chain();
 8632      otherwise, if SSL_VERIFY_NONE is set, remaining error codes
 8633      can lead to 'unexplainable' connection aborts later.
 8634      [Bodo Moeller; problem tracked down by Lutz Jaenicke]
 8635 
 8636   *) Major EVP API cipher revision.
 8637      Add hooks for extra EVP features. This allows various cipher
 8638      parameters to be set in the EVP interface. Support added for variable
 8639      key length ciphers via the EVP_CIPHER_CTX_set_key_length() function and
 8640      setting of RC2 and RC5 parameters.
 8641 
 8642      Modify EVP_OpenInit() and EVP_SealInit() to cope with variable key length
 8643      ciphers.
 8644 
 8645      Remove lots of duplicated code from the EVP library. For example *every*
 8646      cipher init() function handles the 'iv' in the same way according to the
 8647      cipher mode. They also all do nothing if the 'key' parameter is NULL and
 8648      for CFB and OFB modes they zero ctx->num.
 8649 
 8650      New functionality allows removal of S/MIME code RC2 hack.
 8651 
 8652      Most of the routines have the same form and so can be declared in terms
 8653      of macros.
 8654 
 8655      By shifting this to the top level EVP_CipherInit() it can be removed from
 8656      all individual ciphers. If the cipher wants to handle IVs or keys
 8657      differently it can set the EVP_CIPH_CUSTOM_IV or EVP_CIPH_ALWAYS_CALL_INIT
 8658      flags.
 8659 
 8660      Change lots of functions like EVP_EncryptUpdate() to now return a
 8661      value: although software versions of the algorithms cannot fail
 8662      any installed hardware versions can.
 8663      [Steve Henson]
 8664 
 8665   *) Implement SSL_OP_TLS_ROLLBACK_BUG: In ssl3_get_client_key_exchange, if
 8666      this option is set, tolerate broken clients that send the negotiated
 8667      protocol version number instead of the requested protocol version
 8668      number.
 8669      [Bodo Moeller]
 8670 
 8671   *) Call dh_tmp_cb (set by ..._TMP_DH_CB) with correct 'is_export' flag;
 8672      i.e. non-zero for export ciphersuites, zero otherwise.
 8673      Previous versions had this flag inverted, inconsistent with
 8674      rsa_tmp_cb (..._TMP_RSA_CB).
 8675      [Bodo Moeller; problem reported by Amit Chopra]
 8676 
 8677   *) Add missing DSA library text string. Work around for some IIS
 8678      key files with invalid SEQUENCE encoding.
 8679      [Steve Henson]
 8680 
 8681   *) Add a document (doc/standards.txt) that list all kinds of standards
 8682      and so on that are implemented in OpenSSL.
 8683      [Richard Levitte]
 8684 
 8685   *) Enhance c_rehash script. Old version would mishandle certificates
 8686      with the same subject name hash and wouldn't handle CRLs at all.
 8687      Added -fingerprint option to crl utility, to support new c_rehash
 8688      features.
 8689      [Steve Henson]
 8690 
 8691   *) Eliminate non-ANSI declarations in crypto.h and stack.h.
 8692      [Ulf Möller]
 8693 
 8694   *) Fix for SSL server purpose checking. Server checking was
 8695      rejecting certificates which had extended key usage present
 8696      but no ssl client purpose.
 8697      [Steve Henson, reported by Rene Grosser <grosser@hisolutions.com>]
 8698 
 8699   *) Make PKCS#12 code work with no password. The PKCS#12 spec
 8700      is a little unclear about how a blank password is handled.
 8701      Since the password in encoded as a BMPString with terminating
 8702      double NULL a zero length password would end up as just the
 8703      double NULL. However no password at all is different and is
 8704      handled differently in the PKCS#12 key generation code. NS
 8705      treats a blank password as zero length. MSIE treats it as no
 8706      password on export: but it will try both on import. We now do
 8707      the same: PKCS12_parse() tries zero length and no password if
 8708      the password is set to "" or NULL (NULL is now a valid password:
 8709      it wasn't before) as does the pkcs12 application.
 8710      [Steve Henson]
 8711 
 8712   *) Bugfixes in apps/x509.c: Avoid a memory leak; and don't use
 8713      perror when PEM_read_bio_X509_REQ fails, the error message must
 8714      be obtained from the error queue.
 8715      [Bodo Moeller]
 8716 
 8717   *) Avoid 'thread_hash' memory leak in crypto/err/err.c by freeing
 8718      it in ERR_remove_state if appropriate, and change ERR_get_state
 8719      accordingly to avoid race conditions (this is necessary because
 8720      thread_hash is no longer constant once set).
 8721      [Bodo Moeller]
 8722 
 8723   *) Bugfix for linux-elf makefile.one.
 8724      [Ulf Möller]
 8725 
 8726   *) RSA_get_default_method() will now cause a default
 8727      RSA_METHOD to be chosen if one doesn't exist already.
 8728      Previously this was only set during a call to RSA_new()
 8729      or RSA_new_method(NULL) meaning it was possible for
 8730      RSA_get_default_method() to return NULL.
 8731      [Geoff Thorpe]
 8732 
 8733   *) Added native name translation to the existing DSO code
 8734      that will convert (if the flag to do so is set) filenames
 8735      that are sufficiently small and have no path information
 8736      into a canonical native form. Eg. "blah" converted to
 8737      "libblah.so" or "blah.dll" etc.
 8738      [Geoff Thorpe]
 8739 
 8740   *) New function ERR_error_string_n(e, buf, len) which is like
 8741      ERR_error_string(e, buf), but writes at most 'len' bytes
 8742      including the 0 terminator.  For ERR_error_string_n, 'buf'
 8743      may not be NULL.
 8744      [Damien Miller <djm@mindrot.org>, Bodo Moeller]
 8745 
 8746   *) CONF library reworked to become more general.  A new CONF
 8747      configuration file reader "class" is implemented as well as a
 8748      new functions (NCONF_*, for "New CONF") to handle it.  The now
 8749      old CONF_* functions are still there, but are reimplemented to
 8750      work in terms of the new functions.  Also, a set of functions
 8751      to handle the internal storage of the configuration data is
 8752      provided to make it easier to write new configuration file
 8753      reader "classes" (I can definitely see something reading a
 8754      configuration file in XML format, for example), called _CONF_*,
 8755      or "the configuration storage API"...
 8756 
 8757      The new configuration file reading functions are:
 8758 
 8759         NCONF_new, NCONF_free, NCONF_load, NCONF_load_fp, NCONF_load_bio,
 8760         NCONF_get_section, NCONF_get_string, NCONF_get_numbre
 8761 
 8762         NCONF_default, NCONF_WIN32
 8763 
 8764         NCONF_dump_fp, NCONF_dump_bio
 8765 
 8766      NCONF_default and NCONF_WIN32 are method (or "class") choosers,
 8767      NCONF_new creates a new CONF object.  This works in the same way
 8768      as other interfaces in OpenSSL, like the BIO interface.
 8769      NCONF_dump_* dump the internal storage of the configuration file,
 8770      which is useful for debugging.  All other functions take the same
 8771      arguments as the old CONF_* functions wth the exception of the
 8772      first that must be a `CONF *' instead of a `LHASH *'.
 8773 
 8774      To make it easer to use the new classes with the old CONF_* functions,
 8775      the function CONF_set_default_method is provided.
 8776      [Richard Levitte]
 8777 
 8778   *) Add '-tls1' option to 'openssl ciphers', which was already
 8779      mentioned in the documentation but had not been implemented.
 8780      (This option is not yet really useful because even the additional
 8781      experimental TLS 1.0 ciphers are currently treated as SSL 3.0 ciphers.)
 8782      [Bodo Moeller]
 8783 
 8784   *) Initial DSO code added into libcrypto for letting OpenSSL (and
 8785      OpenSSL-based applications) load shared libraries and bind to
 8786      them in a portable way.
 8787      [Geoff Thorpe, with contributions from Richard Levitte]
 8788 
 8789  Changes between 0.9.5 and 0.9.5a  [1 Apr 2000]
 8790 
 8791   *) Make sure _lrotl and _lrotr are only used with MSVC.
 8792 
 8793   *) Use lock CRYPTO_LOCK_RAND correctly in ssleay_rand_status
 8794      (the default implementation of RAND_status).
 8795 
 8796   *) Rename openssl x509 option '-crlext', which was added in 0.9.5,
 8797      to '-clrext' (= clear extensions), as intended and documented.
 8798      [Bodo Moeller; inconsistency pointed out by Michael Attili
 8799      <attili@amaxo.com>]
 8800 
 8801   *) Fix for HMAC. It wasn't zeroing the rest of the block if the key length
 8802      was larger than the MD block size.      
 8803      [Steve Henson, pointed out by Yost William <YostW@tce.com>]
 8804 
 8805   *) Modernise PKCS12_parse() so it uses STACK_OF(X509) for its ca argument
 8806      fix a leak when the ca argument was passed as NULL. Stop X509_PUBKEY_set()
 8807      using the passed key: if the passed key was a private key the result
 8808      of X509_print(), for example, would be to print out all the private key
 8809      components.
 8810      [Steve Henson]
 8811 
 8812   *) des_quad_cksum() byte order bug fix.
 8813      [Ulf Möller, using the problem description in krb4-0.9.7, where
 8814       the solution is attributed to Derrick J Brashear <shadow@DEMENTIA.ORG>]
 8815 
 8816   *) Fix so V_ASN1_APP_CHOOSE works again: however its use is strongly
 8817      discouraged.
 8818      [Steve Henson, pointed out by Brian Korver <briank@cs.stanford.edu>]
 8819 
 8820   *) For easily testing in shell scripts whether some command
 8821      'openssl XXX' exists, the new pseudo-command 'openssl no-XXX'
 8822      returns with exit code 0 iff no command of the given name is available.
 8823      'no-XXX' is printed in this case, 'XXX' otherwise.  In both cases,
 8824      the output goes to stdout and nothing is printed to stderr.
 8825      Additional arguments are always ignored.
 8826 
 8827      Since for each cipher there is a command of the same name,
 8828      the 'no-cipher' compilation switches can be tested this way.
 8829 
 8830      ('openssl no-XXX' is not able to detect pseudo-commands such
 8831      as 'quit', 'list-XXX-commands', or 'no-XXX' itself.)
 8832      [Bodo Moeller]
 8833 
 8834   *) Update test suite so that 'make test' succeeds in 'no-rsa' configuration.
 8835      [Bodo Moeller]
 8836 
 8837   *) For SSL_[CTX_]set_tmp_dh, don't create a DH key if SSL_OP_SINGLE_DH_USE
 8838      is set; it will be thrown away anyway because each handshake creates
 8839      its own key.
 8840      ssl_cert_dup, which is used by SSL_new, now copies DH keys in addition
 8841      to parameters -- in previous versions (since OpenSSL 0.9.3) the
 8842      'default key' from SSL_CTX_set_tmp_dh would always be lost, meanining
 8843      you effectivly got SSL_OP_SINGLE_DH_USE when using this macro.
 8844      [Bodo Moeller]
 8845 
 8846   *) New s_client option -ign_eof: EOF at stdin is ignored, and
 8847      'Q' and 'R' lose their special meanings (quit/renegotiate).
 8848      This is part of what -quiet does; unlike -quiet, -ign_eof
 8849      does not suppress any output.
 8850      [Richard Levitte]
 8851 
 8852   *) Add compatibility options to the purpose and trust code. The
 8853      purpose X509_PURPOSE_ANY is "any purpose" which automatically
 8854      accepts a certificate or CA, this was the previous behaviour,
 8855      with all the associated security issues.
 8856 
 8857      X509_TRUST_COMPAT is the old trust behaviour: only and
 8858      automatically trust self signed roots in certificate store. A
 8859      new trust setting X509_TRUST_DEFAULT is used to specify that
 8860      a purpose has no associated trust setting and it should instead
 8861      use the value in the default purpose.
 8862      [Steve Henson]
 8863 
 8864   *) Fix the PKCS#8 DSA private key code so it decodes keys again
 8865      and fix a memory leak.
 8866      [Steve Henson]
 8867 
 8868   *) In util/mkerr.pl (which implements 'make errors'), preserve
 8869      reason strings from the previous version of the .c file, as
 8870      the default to have only downcase letters (and digits) in
 8871      automatically generated reasons codes is not always appropriate.
 8872      [Bodo Moeller]
 8873 
 8874   *) In ERR_load_ERR_strings(), build an ERR_LIB_SYS error reason table
 8875      using strerror.  Previously, ERR_reason_error_string() returned
 8876      library names as reason strings for SYSerr; but SYSerr is a special
 8877      case where small numbers are errno values, not library numbers.
 8878      [Bodo Moeller]
 8879 
 8880   *) Add '-dsaparam' option to 'openssl dhparam' application.  This
 8881      converts DSA parameters into DH parameters. (When creating parameters,
 8882      DSA_generate_parameters is used.)
 8883      [Bodo Moeller]
 8884 
 8885   *) Include 'length' (recommended exponent length) in C code generated
 8886      by 'openssl dhparam -C'.
 8887      [Bodo Moeller]
 8888 
 8889   *) The second argument to set_label in perlasm was already being used
 8890      so couldn't be used as a "file scope" flag. Moved to third argument
 8891      which was free.
 8892      [Steve Henson]
 8893 
 8894   *) In PEM_ASN1_write_bio and some other functions, use RAND_pseudo_bytes
 8895      instead of RAND_bytes for encryption IVs and salts.
 8896      [Bodo Moeller]
 8897 
 8898   *) Include RAND_status() into RAND_METHOD instead of implementing
 8899      it only for md_rand.c  Otherwise replacing the PRNG by calling
 8900      RAND_set_rand_method would be impossible.
 8901      [Bodo Moeller]
 8902 
 8903   *) Don't let DSA_generate_key() enter an infinite loop if the random
 8904      number generation fails.
 8905      [Bodo Moeller]
 8906 
 8907   *) New 'rand' application for creating pseudo-random output.
 8908      [Bodo Moeller]
 8909 
 8910   *) Added configuration support for Linux/IA64
 8911      [Rolf Haberrecker <rolf@suse.de>]
 8912 
 8913   *) Assembler module support for Mingw32.
 8914      [Ulf Möller]
 8915 
 8916   *) Shared library support for HPUX (in shlib/).
 8917      [Lutz Jaenicke <Lutz.Jaenicke@aet.TU-Cottbus.DE> and Anonymous]
 8918 
 8919   *) Shared library support for Solaris gcc.
 8920      [Lutz Behnke <behnke@trustcenter.de>]
 8921 
 8922  Changes between 0.9.4 and 0.9.5  [28 Feb 2000]
 8923 
 8924   *) PKCS7_encrypt() was adding text MIME headers twice because they
 8925      were added manually and by SMIME_crlf_copy().
 8926      [Steve Henson]
 8927 
 8928   *) In bntest.c don't call BN_rand with zero bits argument.
 8929      [Steve Henson, pointed out by Andrew W. Gray <agray@iconsinc.com>]
 8930 
 8931   *) BN_mul bugfix: In bn_mul_part_recursion() only the a>a[n] && b>b[n]
 8932      case was implemented. This caused BN_div_recp() to fail occasionally.
 8933      [Ulf Möller]
 8934 
 8935   *) Add an optional second argument to the set_label() in the perl
 8936      assembly language builder. If this argument exists and is set
 8937      to 1 it signals that the assembler should use a symbol whose 
 8938      scope is the entire file, not just the current function. This
 8939      is needed with MASM which uses the format label:: for this scope.
 8940      [Steve Henson, pointed out by Peter Runestig <peter@runestig.com>]
 8941 
 8942   *) Change the ASN1 types so they are typedefs by default. Before
 8943      almost all types were #define'd to ASN1_STRING which was causing
 8944      STACK_OF() problems: you couldn't declare STACK_OF(ASN1_UTF8STRING)
 8945      for example.
 8946      [Steve Henson]
 8947 
 8948   *) Change names of new functions to the new get1/get0 naming
 8949      convention: After 'get1', the caller owns a reference count
 8950      and has to call ..._free; 'get0' returns a pointer to some
 8951      data structure without incrementing reference counters.
 8952      (Some of the existing 'get' functions increment a reference
 8953      counter, some don't.)
 8954      Similarly, 'set1' and 'add1' functions increase reference
 8955      counters or duplicate objects.
 8956      [Steve Henson]
 8957 
 8958   *) Allow for the possibility of temp RSA key generation failure:
 8959      the code used to assume it always worked and crashed on failure.
 8960      [Steve Henson]
 8961 
 8962   *) Fix potential buffer overrun problem in BIO_printf().
 8963      [Ulf Möller, using public domain code by Patrick Powell; problem
 8964       pointed out by David Sacerdote <das33@cornell.edu>]
 8965 
 8966   *) Support EGD <http://www.lothar.com/tech/crypto/>.  New functions
 8967      RAND_egd() and RAND_status().  In the command line application,
 8968      the EGD socket can be specified like a seed file using RANDFILE
 8969      or -rand.
 8970      [Ulf Möller]
 8971 
 8972   *) Allow the string CERTIFICATE to be tolerated in PKCS#7 structures.
 8973      Some CAs (e.g. Verisign) distribute certificates in this form.
 8974      [Steve Henson]
 8975 
 8976   *) Remove the SSL_ALLOW_ADH compile option and set the default cipher
 8977      list to exclude them. This means that no special compilation option
 8978      is needed to use anonymous DH: it just needs to be included in the
 8979      cipher list.
 8980      [Steve Henson]
 8981 
 8982   *) Change the EVP_MD_CTX_type macro so its meaning consistent with
 8983      EVP_MD_type. The old functionality is available in a new macro called
 8984      EVP_MD_md(). Change code that uses it and update docs.
 8985      [Steve Henson]
 8986 
 8987   *) ..._ctrl functions now have corresponding ..._callback_ctrl functions
 8988      where the 'void *' argument is replaced by a function pointer argument.
 8989      Previously 'void *' was abused to point to functions, which works on
 8990      many platforms, but is not correct.  As these functions are usually
 8991      called by macros defined in OpenSSL header files, most source code
 8992      should work without changes.
 8993      [Richard Levitte]
 8994 
 8995   *) <openssl/opensslconf.h> (which is created by Configure) now contains
 8996      sections with information on -D... compiler switches used for
 8997      compiling the library so that applications can see them.  To enable
 8998      one of these sections, a pre-processor symbol OPENSSL_..._DEFINES
 8999      must be defined.  E.g.,
 9000         #define OPENSSL_ALGORITHM_DEFINES
 9001         #include <openssl/opensslconf.h>
 9002      defines all pertinent NO_<algo> symbols, such as NO_IDEA, NO_RSA, etc.
 9003      [Richard Levitte, Ulf and Bodo Möller]
 9004 
 9005   *) Bugfix: Tolerate fragmentation and interleaving in the SSL 3/TLS
 9006      record layer.
 9007      [Bodo Moeller]
 9008 
 9009   *) Change the 'other' type in certificate aux info to a STACK_OF
 9010      X509_ALGOR. Although not an AlgorithmIdentifier as such it has
 9011      the required ASN1 format: arbitrary types determined by an OID.
 9012      [Steve Henson]
 9013 
 9014   *) Add some PEM_write_X509_REQ_NEW() functions and a command line
 9015      argument to 'req'. This is not because the function is newer or
 9016      better than others it just uses the work 'NEW' in the certificate
 9017      request header lines. Some software needs this.
 9018      [Steve Henson]
 9019 
 9020   *) Reorganise password command line arguments: now passwords can be
 9021      obtained from various sources. Delete the PEM_cb function and make
 9022      it the default behaviour: i.e. if the callback is NULL and the
 9023      usrdata argument is not NULL interpret it as a null terminated pass
 9024      phrase. If usrdata and the callback are NULL then the pass phrase
 9025      is prompted for as usual.
 9026      [Steve Henson]
 9027 
 9028   *) Add support for the Compaq Atalla crypto accelerator. If it is installed,
 9029      the support is automatically enabled. The resulting binaries will
 9030      autodetect the card and use it if present.
 9031      [Ben Laurie and Compaq Inc.]
 9032 
 9033   *) Work around for Netscape hang bug. This sends certificate request
 9034      and server done in one record. Since this is perfectly legal in the
 9035      SSL/TLS protocol it isn't a "bug" option and is on by default. See
 9036      the bugs/SSLv3 entry for more info.
 9037      [Steve Henson]
 9038 
 9039   *) HP-UX tune-up: new unified configs, HP C compiler bug workaround.
 9040      [Andy Polyakov]
 9041 
 9042   *) Add -rand argument to smime and pkcs12 applications and read/write
 9043      of seed file.
 9044      [Steve Henson]
 9045 
 9046   *) New 'passwd' tool for crypt(3) and apr1 password hashes.
 9047      [Bodo Moeller]
 9048 
 9049   *) Add command line password options to the remaining applications.
 9050      [Steve Henson]
 9051 
 9052   *) Bug fix for BN_div_recp() for numerators with an even number of
 9053      bits.
 9054      [Ulf Möller]
 9055 
 9056   *) More tests in bntest.c, and changed test_bn output.
 9057      [Ulf Möller]
 9058 
 9059   *) ./config recognizes MacOS X now.
 9060      [Andy Polyakov]
 9061 
 9062   *) Bug fix for BN_div() when the first words of num and divsor are
 9063      equal (it gave wrong results if (rem=(n1-q*d0)&BN_MASK2) < d0).
 9064      [Ulf Möller]
 9065 
 9066   *) Add support for various broken PKCS#8 formats, and command line
 9067      options to produce them.
 9068      [Steve Henson]
 9069 
 9070   *) New functions BN_CTX_start(), BN_CTX_get() and BT_CTX_end() to
 9071      get temporary BIGNUMs from a BN_CTX.
 9072      [Ulf Möller]
 9073 
 9074   *) Correct return values in BN_mod_exp_mont() and BN_mod_exp2_mont()
 9075      for p == 0.
 9076      [Ulf Möller]
 9077 
 9078   *) Change the SSLeay_add_all_*() functions to OpenSSL_add_all_*() and
 9079      include a #define from the old name to the new. The original intent
 9080      was that statically linked binaries could for example just call
 9081      SSLeay_add_all_ciphers() to just add ciphers to the table and not
 9082      link with digests. This never worked becayse SSLeay_add_all_digests()
 9083      and SSLeay_add_all_ciphers() were in the same source file so calling
 9084      one would link with the other. They are now in separate source files.
 9085      [Steve Henson]
 9086 
 9087   *) Add a new -notext option to 'ca' and a -pubkey option to 'spkac'.
 9088      [Steve Henson]
 9089 
 9090   *) Use a less unusual form of the Miller-Rabin primality test (it used
 9091      a binary algorithm for exponentiation integrated into the Miller-Rabin
 9092      loop, our standard modexp algorithms are faster).
 9093      [Bodo Moeller]
 9094 
 9095   *) Support for the EBCDIC character set completed.
 9096      [Martin Kraemer <Martin.Kraemer@Mch.SNI.De>]
 9097 
 9098   *) Source code cleanups: use const where appropriate, eliminate casts,
 9099      use void * instead of char * in lhash.
 9100      [Ulf Möller] 
 9101 
 9102   *) Bugfix: ssl3_send_server_key_exchange was not restartable
 9103      (the state was not changed to SSL3_ST_SW_KEY_EXCH_B, and because of
 9104      this the server could overwrite ephemeral keys that the client
 9105      has already seen).
 9106      [Bodo Moeller]
 9107 
 9108   *) Turn DSA_is_prime into a macro that calls BN_is_prime,
 9109      using 50 iterations of the Rabin-Miller test.
 9110 
 9111      DSA_generate_parameters now uses BN_is_prime_fasttest (with 50
 9112      iterations of the Rabin-Miller test as required by the appendix
 9113      to FIPS PUB 186[-1]) instead of DSA_is_prime.
 9114      As BN_is_prime_fasttest includes trial division, DSA parameter
 9115      generation becomes much faster.
 9116 
 9117      This implies a change for the callback functions in DSA_is_prime
 9118      and DSA_generate_parameters: The callback function is called once
 9119      for each positive witness in the Rabin-Miller test, not just
 9120      occasionally in the inner loop; and the parameters to the
 9121      callback function now provide an iteration count for the outer
 9122      loop rather than for the current invocation of the inner loop.
 9123      DSA_generate_parameters additionally can call the callback
 9124      function with an 'iteration count' of -1, meaning that a
 9125      candidate has passed the trial division test (when q is generated 
 9126      from an application-provided seed, trial division is skipped).
 9127      [Bodo Moeller]
 9128 
 9129   *) New function BN_is_prime_fasttest that optionally does trial
 9130      division before starting the Rabin-Miller test and has
 9131      an additional BN_CTX * argument (whereas BN_is_prime always
 9132      has to allocate at least one BN_CTX).
 9133      'callback(1, -1, cb_arg)' is called when a number has passed the
 9134      trial division stage.
 9135      [Bodo Moeller]
 9136 
 9137   *) Fix for bug in CRL encoding. The validity dates weren't being handled
 9138      as ASN1_TIME.
 9139      [Steve Henson]
 9140 
 9141   *) New -pkcs12 option to CA.pl script to write out a PKCS#12 file.
 9142      [Steve Henson]
 9143 
 9144   *) New function BN_pseudo_rand().
 9145      [Ulf Möller]
 9146 
 9147   *) Clean up BN_mod_mul_montgomery(): replace the broken (and unreadable)
 9148      bignum version of BN_from_montgomery() with the working code from
 9149      SSLeay 0.9.0 (the word based version is faster anyway), and clean up
 9150      the comments.
 9151      [Ulf Möller]
 9152 
 9153   *) Avoid a race condition in s2_clnt.c (function get_server_hello) that
 9154      made it impossible to use the same SSL_SESSION data structure in
 9155      SSL2 clients in multiple threads.
 9156      [Bodo Moeller]
 9157 
 9158   *) The return value of RAND_load_file() no longer counts bytes obtained
 9159      by stat().  RAND_load_file(..., -1) is new and uses the complete file
 9160      to seed the PRNG (previously an explicit byte count was required).
 9161      [Ulf Möller, Bodo Möller]
 9162 
 9163   *) Clean up CRYPTO_EX_DATA functions, some of these didn't have prototypes
 9164      used (char *) instead of (void *) and had casts all over the place.
 9165      [Steve Henson]
 9166 
 9167   *) Make BN_generate_prime() return NULL on error if ret!=NULL.
 9168      [Ulf Möller]
 9169 
 9170   *) Retain source code compatibility for BN_prime_checks macro:
 9171      BN_is_prime(..., BN_prime_checks, ...) now uses
 9172      BN_prime_checks_for_size to determine the appropriate number of
 9173      Rabin-Miller iterations.
 9174      [Ulf Möller]
 9175 
 9176   *) Diffie-Hellman uses "safe" primes: DH_check() return code renamed to
 9177      DH_CHECK_P_NOT_SAFE_PRIME.
 9178      (Check if this is true? OpenPGP calls them "strong".)
 9179      [Ulf Möller]
 9180 
 9181   *) Merge the functionality of "dh" and "gendh" programs into a new program
 9182      "dhparam". The old programs are retained for now but will handle DH keys
 9183      (instead of parameters) in future.
 9184      [Steve Henson]
 9185 
 9186   *) Make the ciphers, s_server and s_client programs check the return values
 9187      when a new cipher list is set.
 9188      [Steve Henson]
 9189 
 9190   *) Enhance the SSL/TLS cipher mechanism to correctly handle the TLS 56bit
 9191      ciphers. Before when the 56bit ciphers were enabled the sorting was
 9192      wrong.
 9193 
 9194      The syntax for the cipher sorting has been extended to support sorting by
 9195      cipher-strength (using the strength_bits hard coded in the tables).
 9196      The new command is "@STRENGTH" (see also doc/apps/ciphers.pod).
 9197 
 9198      Fix a bug in the cipher-command parser: when supplying a cipher command
 9199      string with an "undefined" symbol (neither command nor alphanumeric
 9200      [A-Za-z0-9], ssl_set_cipher_list used to hang in an endless loop. Now
 9201      an error is flagged.
 9202 
 9203      Due to the strength-sorting extension, the code of the
 9204      ssl_create_cipher_list() function was completely rearranged. I hope that
 9205      the readability was also increased :-)
 9206      [Lutz Jaenicke <Lutz.Jaenicke@aet.TU-Cottbus.DE>]
 9207 
 9208   *) Minor change to 'x509' utility. The -CAcreateserial option now uses 1
 9209      for the first serial number and places 2 in the serial number file. This
 9210      avoids problems when the root CA is created with serial number zero and
 9211      the first user certificate has the same issuer name and serial number
 9212      as the root CA.
 9213      [Steve Henson]
 9214 
 9215   *) Fixes to X509_ATTRIBUTE utilities, change the 'req' program so it uses
 9216      the new code. Add documentation for this stuff.
 9217      [Steve Henson]
 9218 
 9219   *) Changes to X509_ATTRIBUTE utilities. These have been renamed from
 9220      X509_*() to X509at_*() on the grounds that they don't handle X509
 9221      structures and behave in an analagous way to the X509v3 functions:
 9222      they shouldn't be called directly but wrapper functions should be used
 9223      instead.
 9224 
 9225      So we also now have some wrapper functions that call the X509at functions
 9226      when passed certificate requests. (TO DO: similar things can be done with
 9227      PKCS#7 signed and unsigned attributes, PKCS#12 attributes and a few other
 9228      things. Some of these need some d2i or i2d and print functionality
 9229      because they handle more complex structures.)
 9230      [Steve Henson]
 9231 
 9232   *) Add missing #ifndefs that caused missing symbols when building libssl
 9233      as a shared library without RSA.  Use #ifndef NO_SSL2 instead of
 9234      NO_RSA in ssl/s2*.c. 
 9235      [Kris Kennaway <kris@hub.freebsd.org>, modified by Ulf Möller]
 9236 
 9237   *) Precautions against using the PRNG uninitialized: RAND_bytes() now
 9238      has a return value which indicates the quality of the random data
 9239      (1 = ok, 0 = not seeded).  Also an error is recorded on the thread's
 9240      error queue. New function RAND_pseudo_bytes() generates output that is
 9241      guaranteed to be unique but not unpredictable. RAND_add is like
 9242      RAND_seed, but takes an extra argument for an entropy estimate
 9243      (RAND_seed always assumes full entropy).
 9244      [Ulf Möller]
 9245 
 9246   *) Do more iterations of Rabin-Miller probable prime test (specifically,
 9247      3 for 1024-bit primes, 6 for 512-bit primes, 12 for 256-bit primes
 9248      instead of only 2 for all lengths; see BN_prime_checks_for_size definition
 9249      in crypto/bn/bn_prime.c for the complete table).  This guarantees a
 9250      false-positive rate of at most 2^-80 for random input.
 9251      [Bodo Moeller]
 9252 
 9253   *) Rewrite ssl3_read_n (ssl/s3_pkt.c) avoiding a couple of bugs.
 9254      [Bodo Moeller]
 9255 
 9256   *) New function X509_CTX_rget_chain() (renamed to X509_CTX_get1_chain
 9257      in the 0.9.5 release), this returns the chain
 9258      from an X509_CTX structure with a dup of the stack and all
 9259      the X509 reference counts upped: so the stack will exist
 9260      after X509_CTX_cleanup() has been called. Modify pkcs12.c
 9261      to use this.
 9262 
 9263      Also make SSL_SESSION_print() print out the verify return
 9264      code.
 9265      [Steve Henson]
 9266 
 9267   *) Add manpage for the pkcs12 command. Also change the default
 9268      behaviour so MAC iteration counts are used unless the new
 9269      -nomaciter option is used. This improves file security and
 9270      only older versions of MSIE (4.0 for example) need it.
 9271      [Steve Henson]
 9272 
 9273   *) Honor the no-xxx Configure options when creating .DEF files.
 9274      [Ulf Möller]
 9275 
 9276   *) Add PKCS#10 attributes to field table: challengePassword, 
 9277      unstructuredName and unstructuredAddress. These are taken from
 9278      draft PKCS#9 v2.0 but are compatible with v1.2 provided no 
 9279      international characters are used.
 9280 
 9281      More changes to X509_ATTRIBUTE code: allow the setting of types
 9282      based on strings. Remove the 'loc' parameter when adding
 9283      attributes because these will be a SET OF encoding which is sorted
 9284      in ASN1 order.
 9285      [Steve Henson]
 9286 
 9287   *) Initial changes to the 'req' utility to allow request generation
 9288      automation. This will allow an application to just generate a template
 9289      file containing all the field values and have req construct the
 9290      request.
 9291 
 9292      Initial support for X509_ATTRIBUTE handling. Stacks of these are
 9293      used all over the place including certificate requests and PKCS#7
 9294      structures. They are currently handled manually where necessary with
 9295      some primitive wrappers for PKCS#7. The new functions behave in a
 9296      manner analogous to the X509 extension functions: they allow
 9297      attributes to be looked up by NID and added.
 9298 
 9299      Later something similar to the X509V3 code would be desirable to
 9300      automatically handle the encoding, decoding and printing of the
 9301      more complex types. The string types like challengePassword can
 9302      be handled by the string table functions.
 9303 
 9304      Also modified the multi byte string table handling. Now there is
 9305      a 'global mask' which masks out certain types. The table itself
 9306      can use the flag STABLE_NO_MASK to ignore the mask setting: this
 9307      is useful when for example there is only one permissible type
 9308      (as in countryName) and using the mask might result in no valid
 9309      types at all.
 9310      [Steve Henson]
 9311 
 9312   *) Clean up 'Finished' handling, and add functions SSL_get_finished and
 9313      SSL_get_peer_finished to allow applications to obtain the latest
 9314      Finished messages sent to the peer or expected from the peer,
 9315      respectively.  (SSL_get_peer_finished is usually the Finished message
 9316      actually received from the peer, otherwise the protocol will be aborted.)
 9317 
 9318      As the Finished message are message digests of the complete handshake
 9319      (with a total of 192 bits for TLS 1.0 and more for SSL 3.0), they can
 9320      be used for external authentication procedures when the authentication
 9321      provided by SSL/TLS is not desired or is not enough.
 9322      [Bodo Moeller]
 9323 
 9324   *) Enhanced support for Alpha Linux is added. Now ./config checks if
 9325      the host supports BWX extension and if Compaq C is present on the
 9326      $PATH. Just exploiting of the BWX extension results in 20-30%
 9327      performance kick for some algorithms, e.g. DES and RC4 to mention
 9328      a couple. Compaq C in turn generates ~20% faster code for MD5 and
 9329      SHA1.
 9330      [Andy Polyakov]
 9331 
 9332   *) Add support for MS "fast SGC". This is arguably a violation of the
 9333      SSL3/TLS protocol. Netscape SGC does two handshakes: the first with
 9334      weak crypto and after checking the certificate is SGC a second one
 9335      with strong crypto. MS SGC stops the first handshake after receiving
 9336      the server certificate message and sends a second client hello. Since
 9337      a server will typically do all the time consuming operations before
 9338      expecting any further messages from the client (server key exchange
 9339      is the most expensive) there is little difference between the two.
 9340 
 9341      To get OpenSSL to support MS SGC we have to permit a second client
 9342      hello message after we have sent server done. In addition we have to
 9343      reset the MAC if we do get this second client hello.
 9344      [Steve Henson]
 9345 
 9346   *) Add a function 'd2i_AutoPrivateKey()' this will automatically decide
 9347      if a DER encoded private key is RSA or DSA traditional format. Changed
 9348      d2i_PrivateKey_bio() to use it. This is only needed for the "traditional"
 9349      format DER encoded private key. Newer code should use PKCS#8 format which
 9350      has the key type encoded in the ASN1 structure. Added DER private key
 9351      support to pkcs8 application.
 9352      [Steve Henson]
 9353 
 9354   *) SSL 3/TLS 1 servers now don't request certificates when an anonymous
 9355      ciphersuites has been selected (as required by the SSL 3/TLS 1
 9356      specifications).  Exception: When SSL_VERIFY_FAIL_IF_NO_PEER_CERT
 9357      is set, we interpret this as a request to violate the specification
 9358      (the worst that can happen is a handshake failure, and 'correct'
 9359      behaviour would result in a handshake failure anyway).
 9360      [Bodo Moeller]
 9361 
 9362   *) In SSL_CTX_add_session, take into account that there might be multiple
 9363      SSL_SESSION structures with the same session ID (e.g. when two threads
 9364      concurrently obtain them from an external cache).
 9365      The internal cache can handle only one SSL_SESSION with a given ID,
 9366      so if there's a conflict, we now throw out the old one to achieve
 9367      consistency.
 9368      [Bodo Moeller]
 9369 
 9370   *) Add OIDs for idea and blowfish in CBC mode. This will allow both
 9371      to be used in PKCS#5 v2.0 and S/MIME.  Also add checking to
 9372      some routines that use cipher OIDs: some ciphers do not have OIDs
 9373      defined and so they cannot be used for S/MIME and PKCS#5 v2.0 for
 9374      example.
 9375      [Steve Henson]
 9376 
 9377   *) Simplify the trust setting structure and code. Now we just have
 9378      two sequences of OIDs for trusted and rejected settings. These will
 9379      typically have values the same as the extended key usage extension
 9380      and any application specific purposes.
 9381 
 9382      The trust checking code now has a default behaviour: it will just
 9383      check for an object with the same NID as the passed id. Functions can
 9384      be provided to override either the default behaviour or the behaviour
 9385      for a given id. SSL client, server and email already have functions
 9386      in place for compatibility: they check the NID and also return "trusted"
 9387      if the certificate is self signed.
 9388      [Steve Henson]
 9389 
 9390   *) Add d2i,i2d bio/fp functions for PrivateKey: these convert the
 9391      traditional format into an EVP_PKEY structure.
 9392      [Steve Henson]
 9393 
 9394   *) Add a password callback function PEM_cb() which either prompts for
 9395      a password if usr_data is NULL or otherwise assumes it is a null
 9396      terminated password. Allow passwords to be passed on command line
 9397      environment or config files in a few more utilities.
 9398      [Steve Henson]
 9399 
 9400   *) Add a bunch of DER and PEM functions to handle PKCS#8 format private
 9401      keys. Add some short names for PKCS#8 PBE algorithms and allow them
 9402      to be specified on the command line for the pkcs8 and pkcs12 utilities.
 9403      Update documentation.
 9404      [Steve Henson]
 9405 
 9406   *) Support for ASN1 "NULL" type. This could be handled before by using
 9407      ASN1_TYPE but there wasn't any function that would try to read a NULL
 9408      and produce an error if it couldn't. For compatibility we also have
 9409      ASN1_NULL_new() and ASN1_NULL_free() functions but these are faked and
 9410      don't allocate anything because they don't need to.
 9411      [Steve Henson]
 9412 
 9413   *) Initial support for MacOS is now provided. Examine INSTALL.MacOS
 9414      for details.
 9415      [Andy Polyakov, Roy Woods <roy@centicsystems.ca>]
 9416 
 9417   *) Rebuild of the memory allocation routines used by OpenSSL code and
 9418      possibly others as well.  The purpose is to make an interface that
 9419      provide hooks so anyone can build a separate set of allocation and
 9420      deallocation routines to be used by OpenSSL, for example memory
 9421      pool implementations, or something else, which was previously hard
 9422      since Malloc(), Realloc() and Free() were defined as macros having
 9423      the values malloc, realloc and free, respectively (except for Win32
 9424      compilations).  The same is provided for memory debugging code.
 9425      OpenSSL already comes with functionality to find memory leaks, but
 9426      this gives people a chance to debug other memory problems.
 9427 
 9428      With these changes, a new set of functions and macros have appeared:
 9429 
 9430        CRYPTO_set_mem_debug_functions()	        [F]
 9431        CRYPTO_get_mem_debug_functions()         [F]
 9432        CRYPTO_dbg_set_options()	                [F]
 9433        CRYPTO_dbg_get_options()                 [F]
 9434        CRYPTO_malloc_debug_init()               [M]
 9435 
 9436      The memory debug functions are NULL by default, unless the library
 9437      is compiled with CRYPTO_MDEBUG or friends is defined.  If someone
 9438      wants to debug memory anyway, CRYPTO_malloc_debug_init() (which
 9439      gives the standard debugging functions that come with OpenSSL) or
 9440      CRYPTO_set_mem_debug_functions() (tells OpenSSL to use functions
 9441      provided by the library user) must be used.  When the standard
 9442      debugging functions are used, CRYPTO_dbg_set_options can be used to
 9443      request additional information:
 9444      CRYPTO_dbg_set_options(V_CYRPTO_MDEBUG_xxx) corresponds to setting
 9445      the CRYPTO_MDEBUG_xxx macro when compiling the library.   
 9446 
 9447      Also, things like CRYPTO_set_mem_functions will always give the
 9448      expected result (the new set of functions is used for allocation
 9449      and deallocation) at all times, regardless of platform and compiler
 9450      options.
 9451 
 9452      To finish it up, some functions that were never use in any other
 9453      way than through macros have a new API and new semantic:
 9454 
 9455        CRYPTO_dbg_malloc()
 9456        CRYPTO_dbg_realloc()
 9457        CRYPTO_dbg_free()
 9458 
 9459      All macros of value have retained their old syntax.
 9460      [Richard Levitte and Bodo Moeller]
 9461 
 9462   *) Some S/MIME fixes. The OID for SMIMECapabilities was wrong, the
 9463      ordering of SMIMECapabilities wasn't in "strength order" and there
 9464      was a missing NULL in the AlgorithmIdentifier for the SHA1 signature
 9465      algorithm.
 9466      [Steve Henson]
 9467 
 9468   *) Some ASN1 types with illegal zero length encoding (INTEGER,
 9469      ENUMERATED and OBJECT IDENTIFIER) choked the ASN1 routines.
 9470      [Frans Heymans <fheymans@isaserver.be>, modified by Steve Henson]
 9471 
 9472   *) Merge in my S/MIME library for OpenSSL. This provides a simple
 9473      S/MIME API on top of the PKCS#7 code, a MIME parser (with enough
 9474      functionality to handle multipart/signed properly) and a utility
 9475      called 'smime' to call all this stuff. This is based on code I
 9476      originally wrote for Celo who have kindly allowed it to be
 9477      included in OpenSSL.
 9478      [Steve Henson]
 9479 
 9480   *) Add variants des_set_key_checked and des_set_key_unchecked of
 9481      des_set_key (aka des_key_sched).  Global variable des_check_key
 9482      decides which of these is called by des_set_key; this way
 9483      des_check_key behaves as it always did, but applications and
 9484      the library itself, which was buggy for des_check_key == 1,
 9485      have a cleaner way to pick the version they need.
 9486      [Bodo Moeller]
 9487 
 9488   *) New function PKCS12_newpass() which changes the password of a
 9489      PKCS12 structure.
 9490      [Steve Henson]
 9491 
 9492   *) Modify X509_TRUST and X509_PURPOSE so it also uses a static and
 9493      dynamic mix. In both cases the ids can be used as an index into the
 9494      table. Also modified the X509_TRUST_add() and X509_PURPOSE_add()
 9495      functions so they accept a list of the field values and the
 9496      application doesn't need to directly manipulate the X509_TRUST
 9497      structure.
 9498      [Steve Henson]
 9499 
 9500   *) Modify the ASN1_STRING_TABLE stuff so it also uses bsearch and doesn't
 9501      need initialising.
 9502      [Steve Henson]
 9503 
 9504   *) Modify the way the V3 extension code looks up extensions. This now
 9505      works in a similar way to the object code: we have some "standard"
 9506      extensions in a static table which is searched with OBJ_bsearch()
 9507      and the application can add dynamic ones if needed. The file
 9508      crypto/x509v3/ext_dat.h now has the info: this file needs to be
 9509      updated whenever a new extension is added to the core code and kept
 9510      in ext_nid order. There is a simple program 'tabtest.c' which checks
 9511      this. New extensions are not added too often so this file can readily
 9512      be maintained manually.
 9513 
 9514      There are two big advantages in doing things this way. The extensions
 9515      can be looked up immediately and no longer need to be "added" using
 9516      X509V3_add_standard_extensions(): this function now does nothing.
 9517      [Side note: I get *lots* of email saying the extension code doesn't
 9518       work because people forget to call this function]
 9519      Also no dynamic allocation is done unless new extensions are added:
 9520      so if we don't add custom extensions there is no need to call
 9521      X509V3_EXT_cleanup().
 9522      [Steve Henson]
 9523 
 9524   *) Modify enc utility's salting as follows: make salting the default. Add a
 9525      magic header, so unsalted files fail gracefully instead of just decrypting
 9526      to garbage. This is because not salting is a big security hole, so people
 9527      should be discouraged from doing it.
 9528      [Ben Laurie]
 9529 
 9530   *) Fixes and enhancements to the 'x509' utility. It allowed a message
 9531      digest to be passed on the command line but it only used this
 9532      parameter when signing a certificate. Modified so all relevant
 9533      operations are affected by the digest parameter including the
 9534      -fingerprint and -x509toreq options. Also -x509toreq choked if a
 9535      DSA key was used because it didn't fix the digest.
 9536      [Steve Henson]
 9537 
 9538   *) Initial certificate chain verify code. Currently tests the untrusted
 9539      certificates for consistency with the verify purpose (which is set
 9540      when the X509_STORE_CTX structure is set up) and checks the pathlength.
 9541 
 9542      There is a NO_CHAIN_VERIFY compilation option to keep the old behaviour:
 9543      this is because it will reject chains with invalid extensions whereas
 9544      every previous version of OpenSSL and SSLeay made no checks at all.
 9545 
 9546      Trust code: checks the root CA for the relevant trust settings. Trust
 9547      settings have an initial value consistent with the verify purpose: e.g.
 9548      if the verify purpose is for SSL client use it expects the CA to be
 9549      trusted for SSL client use. However the default value can be changed to
 9550      permit custom trust settings: one example of this would be to only trust
 9551      certificates from a specific "secure" set of CAs.
 9552 
 9553      Also added X509_STORE_CTX_new() and X509_STORE_CTX_free() functions
 9554      which should be used for version portability: especially since the
 9555      verify structure is likely to change more often now.
 9556 
 9557      SSL integration. Add purpose and trust to SSL_CTX and SSL and functions
 9558      to set them. If not set then assume SSL clients will verify SSL servers
 9559      and vice versa.
 9560 
 9561      Two new options to the verify program: -untrusted allows a set of
 9562      untrusted certificates to be passed in and -purpose which sets the
 9563      intended purpose of the certificate. If a purpose is set then the
 9564      new chain verify code is used to check extension consistency.
 9565      [Steve Henson]
 9566 
 9567   *) Support for the authority information access extension.
 9568      [Steve Henson]
 9569 
 9570   *) Modify RSA and DSA PEM read routines to transparently handle
 9571      PKCS#8 format private keys. New *_PUBKEY_* functions that handle
 9572      public keys in a format compatible with certificate
 9573      SubjectPublicKeyInfo structures. Unfortunately there were already
 9574      functions called *_PublicKey_* which used various odd formats so
 9575      these are retained for compatibility: however the DSA variants were
 9576      never in a public release so they have been deleted. Changed dsa/rsa
 9577      utilities to handle the new format: note no releases ever handled public
 9578      keys so we should be OK.
 9579 
 9580      The primary motivation for this change is to avoid the same fiasco
 9581      that dogs private keys: there are several incompatible private key
 9582      formats some of which are standard and some OpenSSL specific and
 9583      require various evil hacks to allow partial transparent handling and
 9584      even then it doesn't work with DER formats. Given the option anything
 9585      other than PKCS#8 should be dumped: but the other formats have to
 9586      stay in the name of compatibility.
 9587 
 9588      With public keys and the benefit of hindsight one standard format 
 9589      is used which works with EVP_PKEY, RSA or DSA structures: though
 9590      it clearly returns an error if you try to read the wrong kind of key.
 9591 
 9592      Added a -pubkey option to the 'x509' utility to output the public key.
 9593      Also rename the EVP_PKEY_get_*() to EVP_PKEY_rget_*()
 9594      (renamed to EVP_PKEY_get1_*() in the OpenSSL 0.9.5 release) and add
 9595      EVP_PKEY_rset_*() functions (renamed to EVP_PKEY_set1_*())
 9596      that do the same as the EVP_PKEY_assign_*() except they up the
 9597      reference count of the added key (they don't "swallow" the
 9598      supplied key).
 9599      [Steve Henson]
 9600 
 9601   *) Fixes to crypto/x509/by_file.c the code to read in certificates and
 9602      CRLs would fail if the file contained no certificates or no CRLs:
 9603      added a new function to read in both types and return the number
 9604      read: this means that if none are read it will be an error. The
 9605      DER versions of the certificate and CRL reader would always fail
 9606      because it isn't possible to mix certificates and CRLs in DER format
 9607      without choking one or the other routine. Changed this to just read
 9608      a certificate: this is the best we can do. Also modified the code
 9609      in apps/verify.c to take notice of return codes: it was previously
 9610      attempting to read in certificates from NULL pointers and ignoring
 9611      any errors: this is one reason why the cert and CRL reader seemed
 9612      to work. It doesn't check return codes from the default certificate
 9613      routines: these may well fail if the certificates aren't installed.
 9614      [Steve Henson]
 9615 
 9616   *) Code to support otherName option in GeneralName.
 9617      [Steve Henson]
 9618 
 9619   *) First update to verify code. Change the verify utility
 9620      so it warns if it is passed a self signed certificate:
 9621      for consistency with the normal behaviour. X509_verify
 9622      has been modified to it will now verify a self signed
 9623      certificate if *exactly* the same certificate appears
 9624      in the store: it was previously impossible to trust a
 9625      single self signed certificate. This means that:
 9626      openssl verify ss.pem
 9627      now gives a warning about a self signed certificate but
 9628      openssl verify -CAfile ss.pem ss.pem
 9629      is OK.
 9630      [Steve Henson]
 9631 
 9632   *) For servers, store verify_result in SSL_SESSION data structure
 9633      (and add it to external session representation).
 9634      This is needed when client certificate verifications fails,
 9635      but an application-provided verification callback (set by
 9636      SSL_CTX_set_cert_verify_callback) allows accepting the session
 9637      anyway (i.e. leaves x509_store_ctx->error != X509_V_OK
 9638      but returns 1): When the session is reused, we have to set
 9639      ssl->verify_result to the appropriate error code to avoid
 9640      security holes.
 9641      [Bodo Moeller, problem pointed out by Lutz Jaenicke]
 9642 
 9643   *) Fix a bug in the new PKCS#7 code: it didn't consider the
 9644      case in PKCS7_dataInit() where the signed PKCS7 structure
 9645      didn't contain any existing data because it was being created.
 9646      [Po-Cheng Chen <pocheng@nst.com.tw>, slightly modified by Steve Henson]
 9647 
 9648   *) Add a salt to the key derivation routines in enc.c. This
 9649      forms the first 8 bytes of the encrypted file. Also add a
 9650      -S option to allow a salt to be input on the command line.
 9651      [Steve Henson]
 9652 
 9653   *) New function X509_cmp(). Oddly enough there wasn't a function
 9654      to compare two certificates. We do this by working out the SHA1
 9655      hash and comparing that. X509_cmp() will be needed by the trust
 9656      code.
 9657      [Steve Henson]
 9658 
 9659   *) SSL_get1_session() is like SSL_get_session(), but increments
 9660      the reference count in the SSL_SESSION returned.
 9661      [Geoff Thorpe <geoff@eu.c2.net>]
 9662 
 9663   *) Fix for 'req': it was adding a null to request attributes.
 9664      Also change the X509_LOOKUP and X509_INFO code to handle
 9665      certificate auxiliary information.
 9666      [Steve Henson]
 9667 
 9668   *) Add support for 40 and 64 bit RC2 and RC4 algorithms: document
 9669      the 'enc' command.
 9670      [Steve Henson]
 9671 
 9672   *) Add the possibility to add extra information to the memory leak
 9673      detecting output, to form tracebacks, showing from where each
 9674      allocation was originated: CRYPTO_push_info("constant string") adds
 9675      the string plus current file name and line number to a per-thread
 9676      stack, CRYPTO_pop_info() does the obvious, CRYPTO_remove_all_info()
 9677      is like calling CYRPTO_pop_info() until the stack is empty.
 9678      Also updated memory leak detection code to be multi-thread-safe.
 9679      [Richard Levitte]
 9680 
 9681   *) Add options -text and -noout to pkcs7 utility and delete the
 9682      encryption options which never did anything. Update docs.
 9683      [Steve Henson]
 9684 
 9685   *) Add options to some of the utilities to allow the pass phrase
 9686      to be included on either the command line (not recommended on
 9687      OSes like Unix) or read from the environment. Update the
 9688      manpages and fix a few bugs.
 9689      [Steve Henson]
 9690 
 9691   *) Add a few manpages for some of the openssl commands.
 9692      [Steve Henson]
 9693 
 9694   *) Fix the -revoke option in ca. It was freeing up memory twice,
 9695      leaking and not finding already revoked certificates.
 9696      [Steve Henson]
 9697 
 9698   *) Extensive changes to support certificate auxiliary information.
 9699      This involves the use of X509_CERT_AUX structure and X509_AUX
 9700      functions. An X509_AUX function such as PEM_read_X509_AUX()
 9701      can still read in a certificate file in the usual way but it
 9702      will also read in any additional "auxiliary information". By
 9703      doing things this way a fair degree of compatibility can be
 9704      retained: existing certificates can have this information added
 9705      using the new 'x509' options. 
 9706 
 9707      Current auxiliary information includes an "alias" and some trust
 9708      settings. The trust settings will ultimately be used in enhanced
 9709      certificate chain verification routines: currently a certificate
 9710      can only be trusted if it is self signed and then it is trusted
 9711      for all purposes.
 9712      [Steve Henson]
 9713 
 9714   *) Fix assembler for Alpha (tested only on DEC OSF not Linux or *BSD).
 9715      The problem was that one of the replacement routines had not been working
 9716      since SSLeay releases.  For now the offending routine has been replaced
 9717      with non-optimised assembler.  Even so, this now gives around 95%
 9718      performance improvement for 1024 bit RSA signs.
 9719      [Mark Cox]
 9720 
 9721   *) Hack to fix PKCS#7 decryption when used with some unorthodox RC2 
 9722      handling. Most clients have the effective key size in bits equal to
 9723      the key length in bits: so a 40 bit RC2 key uses a 40 bit (5 byte) key.
 9724      A few however don't do this and instead use the size of the decrypted key
 9725      to determine the RC2 key length and the AlgorithmIdentifier to determine
 9726      the effective key length. In this case the effective key length can still
 9727      be 40 bits but the key length can be 168 bits for example. This is fixed
 9728      by manually forcing an RC2 key into the EVP_PKEY structure because the
 9729      EVP code can't currently handle unusual RC2 key sizes: it always assumes
 9730      the key length and effective key length are equal.
 9731      [Steve Henson]
 9732 
 9733   *) Add a bunch of functions that should simplify the creation of 
 9734      X509_NAME structures. Now you should be able to do:
 9735      X509_NAME_add_entry_by_txt(nm, "CN", MBSTRING_ASC, "Steve", -1, -1, 0);
 9736      and have it automatically work out the correct field type and fill in
 9737      the structures. The more adventurous can try:
 9738      X509_NAME_add_entry_by_txt(nm, field, MBSTRING_UTF8, str, -1, -1, 0);
 9739      and it will (hopefully) work out the correct multibyte encoding.
 9740      [Steve Henson]
 9741 
 9742   *) Change the 'req' utility to use the new field handling and multibyte
 9743      copy routines. Before the DN field creation was handled in an ad hoc
 9744      way in req, ca, and x509 which was rather broken and didn't support
 9745      BMPStrings or UTF8Strings. Since some software doesn't implement
 9746      BMPStrings or UTF8Strings yet, they can be enabled using the config file
 9747      using the dirstring_type option. See the new comment in the default
 9748      openssl.cnf for more info.
 9749      [Steve Henson]
 9750 
 9751   *) Make crypto/rand/md_rand.c more robust:
 9752      - Assure unique random numbers after fork().
 9753      - Make sure that concurrent threads access the global counter and
 9754        md serializably so that we never lose entropy in them
 9755        or use exactly the same state in multiple threads.
 9756        Access to the large state is not always serializable because
 9757        the additional locking could be a performance killer, and
 9758        md should be large enough anyway.
 9759      [Bodo Moeller]
 9760 
 9761   *) New file apps/app_rand.c with commonly needed functionality
 9762      for handling the random seed file.
 9763 
 9764      Use the random seed file in some applications that previously did not:
 9765           ca,
 9766           dsaparam -genkey (which also ignored its '-rand' option), 
 9767           s_client,
 9768           s_server,
 9769           x509 (when signing).
 9770      Except on systems with /dev/urandom, it is crucial to have a random
 9771      seed file at least for key creation, DSA signing, and for DH exchanges;
 9772      for RSA signatures we could do without one.
 9773 
 9774      gendh and gendsa (unlike genrsa) used to read only the first byte
 9775      of each file listed in the '-rand' option.  The function as previously
 9776      found in genrsa is now in app_rand.c and is used by all programs
 9777      that support '-rand'.
 9778      [Bodo Moeller]
 9779 
 9780   *) In RAND_write_file, use mode 0600 for creating files;
 9781      don't just chmod when it may be too late.
 9782      [Bodo Moeller]
 9783 
 9784   *) Report an error from X509_STORE_load_locations
 9785      when X509_LOOKUP_load_file or X509_LOOKUP_add_dir failed.
 9786      [Bill Perry]
 9787 
 9788   *) New function ASN1_mbstring_copy() this copies a string in either
 9789      ASCII, Unicode, Universal (4 bytes per character) or UTF8 format
 9790      into an ASN1_STRING type. A mask of permissible types is passed
 9791      and it chooses the "minimal" type to use or an error if not type
 9792      is suitable.
 9793      [Steve Henson]
 9794 
 9795   *) Add function equivalents to the various macros in asn1.h. The old
 9796      macros are retained with an M_ prefix. Code inside the library can
 9797      use the M_ macros. External code (including the openssl utility)
 9798      should *NOT* in order to be "shared library friendly".
 9799      [Steve Henson]
 9800 
 9801   *) Add various functions that can check a certificate's extensions
 9802      to see if it usable for various purposes such as SSL client,
 9803      server or S/MIME and CAs of these types. This is currently 
 9804      VERY EXPERIMENTAL but will ultimately be used for certificate chain
 9805      verification. Also added a -purpose flag to x509 utility to
 9806      print out all the purposes.
 9807      [Steve Henson]
 9808 
 9809   *) Add a CRYPTO_EX_DATA to X509 certificate structure and associated
 9810      functions.
 9811      [Steve Henson]
 9812 
 9813   *) New X509V3_{X509,CRL,REVOKED}_get_d2i() functions. These will search
 9814      for, obtain and decode and extension and obtain its critical flag.
 9815      This allows all the necessary extension code to be handled in a
 9816      single function call.
 9817      [Steve Henson]
 9818 
 9819   *) RC4 tune-up featuring 30-40% performance improvement on most RISC
 9820      platforms. See crypto/rc4/rc4_enc.c for further details.
 9821      [Andy Polyakov]
 9822 
 9823   *) New -noout option to asn1parse. This causes no output to be produced
 9824      its main use is when combined with -strparse and -out to extract data
 9825      from a file (which may not be in ASN.1 format).
 9826      [Steve Henson]
 9827 
 9828   *) Fix for pkcs12 program. It was hashing an invalid certificate pointer
 9829      when producing the local key id.
 9830      [Richard Levitte <levitte@stacken.kth.se>]
 9831 
 9832   *) New option -dhparam in s_server. This allows a DH parameter file to be
 9833      stated explicitly. If it is not stated then it tries the first server
 9834      certificate file. The previous behaviour hard coded the filename
 9835      "server.pem".
 9836      [Steve Henson]
 9837 
 9838   *) Add -pubin and -pubout options to the rsa and dsa commands. These allow
 9839      a public key to be input or output. For example:
 9840      openssl rsa -in key.pem -pubout -out pubkey.pem
 9841      Also added necessary DSA public key functions to handle this.
 9842      [Steve Henson]
 9843 
 9844   *) Fix so PKCS7_dataVerify() doesn't crash if no certificates are contained
 9845      in the message. This was handled by allowing
 9846      X509_find_by_issuer_and_serial() to tolerate a NULL passed to it.
 9847      [Steve Henson, reported by Sampo Kellomaki <sampo@mail.neuronio.pt>]
 9848 
 9849   *) Fix for bug in d2i_ASN1_bytes(): other ASN1 functions add an extra null
 9850      to the end of the strings whereas this didn't. This would cause problems
 9851      if strings read with d2i_ASN1_bytes() were later modified.
 9852      [Steve Henson, reported by Arne Ansper <arne@ats.cyber.ee>]
 9853 
 9854   *) Fix for base64 decode bug. When a base64 bio reads only one line of
 9855      data and it contains EOF it will end up returning an error. This is
 9856      caused by input 46 bytes long. The cause is due to the way base64
 9857      BIOs find the start of base64 encoded data. They do this by trying a
 9858      trial decode on each line until they find one that works. When they
 9859      do a flag is set and it starts again knowing it can pass all the
 9860      data directly through the decoder. Unfortunately it doesn't reset
 9861      the context it uses. This means that if EOF is reached an attempt
 9862      is made to pass two EOFs through the context and this causes the
 9863      resulting error. This can also cause other problems as well. As is
 9864      usual with these problems it takes *ages* to find and the fix is
 9865      trivial: move one line.
 9866      [Steve Henson, reported by ian@uns.ns.ac.yu (Ivan Nejgebauer) ]
 9867 
 9868   *) Ugly workaround to get s_client and s_server working under Windows. The
 9869      old code wouldn't work because it needed to select() on sockets and the
 9870      tty (for keypresses and to see if data could be written). Win32 only
 9871      supports select() on sockets so we select() with a 1s timeout on the
 9872      sockets and then see if any characters are waiting to be read, if none
 9873      are present then we retry, we also assume we can always write data to
 9874      the tty. This isn't nice because the code then blocks until we've
 9875      received a complete line of data and it is effectively polling the
 9876      keyboard at 1s intervals: however it's quite a bit better than not
 9877      working at all :-) A dedicated Windows application might handle this
 9878      with an event loop for example.
 9879      [Steve Henson]
 9880 
 9881   *) Enhance RSA_METHOD structure. Now there are two extra methods, rsa_sign
 9882      and rsa_verify. When the RSA_FLAGS_SIGN_VER option is set these functions
 9883      will be called when RSA_sign() and RSA_verify() are used. This is useful
 9884      if rsa_pub_dec() and rsa_priv_enc() equivalents are not available.
 9885      For this to work properly RSA_public_decrypt() and RSA_private_encrypt()
 9886      should *not* be used: RSA_sign() and RSA_verify() must be used instead.
 9887      This necessitated the support of an extra signature type NID_md5_sha1
 9888      for SSL signatures and modifications to the SSL library to use it instead
 9889      of calling RSA_public_decrypt() and RSA_private_encrypt().
 9890      [Steve Henson]
 9891 
 9892   *) Add new -verify -CAfile and -CApath options to the crl program, these
 9893      will lookup a CRL issuers certificate and verify the signature in a
 9894      similar way to the verify program. Tidy up the crl program so it
 9895      no longer accesses structures directly. Make the ASN1 CRL parsing a bit
 9896      less strict. It will now permit CRL extensions even if it is not
 9897      a V2 CRL: this will allow it to tolerate some broken CRLs.
 9898      [Steve Henson]
 9899 
 9900   *) Initialize all non-automatic variables each time one of the openssl
 9901      sub-programs is started (this is necessary as they may be started
 9902      multiple times from the "OpenSSL>" prompt).
 9903      [Lennart Bang, Bodo Moeller]
 9904 
 9905   *) Preliminary compilation option RSA_NULL which disables RSA crypto without
 9906      removing all other RSA functionality (this is what NO_RSA does). This
 9907      is so (for example) those in the US can disable those operations covered
 9908      by the RSA patent while allowing storage and parsing of RSA keys and RSA
 9909      key generation.
 9910      [Steve Henson]
 9911 
 9912   *) Non-copying interface to BIO pairs.
 9913      (still largely untested)
 9914      [Bodo Moeller]
 9915 
 9916   *) New function ANS1_tag2str() to convert an ASN1 tag to a descriptive
 9917      ASCII string. This was handled independently in various places before.
 9918      [Steve Henson]
 9919 
 9920   *) New functions UTF8_getc() and UTF8_putc() that parse and generate
 9921      UTF8 strings a character at a time.
 9922      [Steve Henson]
 9923 
 9924   *) Use client_version from client hello to select the protocol
 9925      (s23_srvr.c) and for RSA client key exchange verification
 9926      (s3_srvr.c), as required by the SSL 3.0/TLS 1.0 specifications.
 9927      [Bodo Moeller]
 9928 
 9929   *) Add various utility functions to handle SPKACs, these were previously
 9930      handled by poking round in the structure internals. Added new function
 9931      NETSCAPE_SPKI_print() to print out SPKAC and a new utility 'spkac' to
 9932      print, verify and generate SPKACs. Based on an original idea from
 9933      Massimiliano Pala <madwolf@comune.modena.it> but extensively modified.
 9934      [Steve Henson]
 9935 
 9936   *) RIPEMD160 is operational on all platforms and is back in 'make test'.
 9937      [Andy Polyakov]
 9938 
 9939   *) Allow the config file extension section to be overwritten on the
 9940      command line. Based on an original idea from Massimiliano Pala
 9941      <madwolf@comune.modena.it>. The new option is called -extensions
 9942      and can be applied to ca, req and x509. Also -reqexts to override
 9943      the request extensions in req and -crlexts to override the crl extensions
 9944      in ca.
 9945      [Steve Henson]
 9946 
 9947   *) Add new feature to the SPKAC handling in ca.  Now you can include
 9948      the same field multiple times by preceding it by "XXXX." for example:
 9949      1.OU="Unit name 1"
 9950      2.OU="Unit name 2"
 9951      this is the same syntax as used in the req config file.
 9952      [Steve Henson]
 9953 
 9954   *) Allow certificate extensions to be added to certificate requests. These
 9955      are specified in a 'req_extensions' option of the req section of the
 9956      config file. They can be printed out with the -text option to req but
 9957      are otherwise ignored at present.
 9958      [Steve Henson]
 9959 
 9960   *) Fix a horrible bug in enc_read() in crypto/evp/bio_enc.c: if the first
 9961      data read consists of only the final block it would not decrypted because
 9962      EVP_CipherUpdate() would correctly report zero bytes had been decrypted.
 9963      A misplaced 'break' also meant the decrypted final block might not be
 9964      copied until the next read.
 9965      [Steve Henson]
 9966 
 9967   *) Initial support for DH_METHOD. Again based on RSA_METHOD. Also added
 9968      a few extra parameters to the DH structure: these will be useful if
 9969      for example we want the value of 'q' or implement X9.42 DH.
 9970      [Steve Henson]
 9971 
 9972   *) Initial support for DSA_METHOD. This is based on the RSA_METHOD and
 9973      provides hooks that allow the default DSA functions or functions on a
 9974      "per key" basis to be replaced. This allows hardware acceleration and
 9975      hardware key storage to be handled without major modification to the
 9976      library. Also added low level modexp hooks and CRYPTO_EX structure and 
 9977      associated functions.
 9978      [Steve Henson]
 9979 
 9980   *) Add a new flag to memory BIOs, BIO_FLAG_MEM_RDONLY. This marks the BIO
 9981      as "read only": it can't be written to and the buffer it points to will
 9982      not be freed. Reading from a read only BIO is much more efficient than
 9983      a normal memory BIO. This was added because there are several times when
 9984      an area of memory needs to be read from a BIO. The previous method was
 9985      to create a memory BIO and write the data to it, this results in two
 9986      copies of the data and an O(n^2) reading algorithm. There is a new
 9987      function BIO_new_mem_buf() which creates a read only memory BIO from
 9988      an area of memory. Also modified the PKCS#7 routines to use read only
 9989      memory BIOs.
 9990      [Steve Henson]
 9991 
 9992   *) Bugfix: ssl23_get_client_hello did not work properly when called in
 9993      state SSL23_ST_SR_CLNT_HELLO_B, i.e. when the first 7 bytes of
 9994      a SSLv2-compatible client hello for SSLv3 or TLSv1 could be read,
 9995      but a retry condition occured while trying to read the rest.
 9996      [Bodo Moeller]
 9997 
 9998   *) The PKCS7_ENC_CONTENT_new() function was setting the content type as
 9999      NID_pkcs7_encrypted by default: this was wrong since this should almost
10000      always be NID_pkcs7_data. Also modified the PKCS7_set_type() to handle
10001      the encrypted data type: this is a more sensible place to put it and it
10002      allows the PKCS#12 code to be tidied up that duplicated this
10003      functionality.
10004      [Steve Henson]
10005 
10006   *) Changed obj_dat.pl script so it takes its input and output files on
10007      the command line. This should avoid shell escape redirection problems
10008      under Win32.
10009      [Steve Henson]
10010 
10011   *) Initial support for certificate extension requests, these are included
10012      in things like Xenroll certificate requests. Included functions to allow
10013      extensions to be obtained and added.
10014      [Steve Henson]
10015 
10016   *) -crlf option to s_client and s_server for sending newlines as
10017      CRLF (as required by many protocols).
10018      [Bodo Moeller]
10019 
10020  Changes between 0.9.3a and 0.9.4  [09 Aug 1999]
10021   
10022   *) Install libRSAglue.a when OpenSSL is built with RSAref.
10023      [Ralf S. Engelschall]
10024 
10025   *) A few more ``#ifndef NO_FP_API / #endif'' pairs for consistency.
10026      [Andrija Antonijevic <TheAntony2@bigfoot.com>]
10027 
10028   *) Fix -startdate and -enddate (which was missing) arguments to 'ca'
10029      program.
10030      [Steve Henson]
10031 
10032   *) New function DSA_dup_DH, which duplicates DSA parameters/keys as
10033      DH parameters/keys (q is lost during that conversion, but the resulting
10034      DH parameters contain its length).
10035 
10036      For 1024-bit p, DSA_generate_parameters followed by DSA_dup_DH is
10037      much faster than DH_generate_parameters (which creates parameters
10038      where p = 2*q + 1), and also the smaller q makes DH computations
10039      much more efficient (160-bit exponentiation instead of 1024-bit
10040      exponentiation); so this provides a convenient way to support DHE
10041      ciphersuites in SSL/TLS servers (see ssl/ssltest.c).  It is of
10042      utter importance to use
10043          SSL_CTX_set_options(s_ctx, SSL_OP_SINGLE_DH_USE);
10044      or
10045          SSL_set_options(s_ctx, SSL_OP_SINGLE_DH_USE);
10046      when such DH parameters are used, because otherwise small subgroup
10047      attacks may become possible!
10048      [Bodo Moeller]
10049 
10050   *) Avoid memory leak in i2d_DHparams.
10051      [Bodo Moeller]
10052 
10053   *) Allow the -k option to be used more than once in the enc program:
10054      this allows the same encrypted message to be read by multiple recipients.
10055      [Steve Henson]
10056 
10057   *) New function OBJ_obj2txt(buf, buf_len, a, no_name), this converts
10058      an ASN1_OBJECT to a text string. If the "no_name" parameter is set then
10059      it will always use the numerical form of the OID, even if it has a short
10060      or long name.
10061      [Steve Henson]
10062 
10063   *) Added an extra RSA flag: RSA_FLAG_EXT_PKEY. Previously the rsa_mod_exp
10064      method only got called if p,q,dmp1,dmq1,iqmp components were present,
10065      otherwise bn_mod_exp was called. In the case of hardware keys for example
10066      no private key components need be present and it might store extra data
10067      in the RSA structure, which cannot be accessed from bn_mod_exp.
10068      By setting RSA_FLAG_EXT_PKEY rsa_mod_exp will always be called for
10069      private key operations.
10070      [Steve Henson]
10071 
10072   *) Added support for SPARC Linux.
10073      [Andy Polyakov]
10074 
10075   *) pem_password_cb function type incompatibly changed from
10076           typedef int pem_password_cb(char *buf, int size, int rwflag);
10077      to
10078           ....(char *buf, int size, int rwflag, void *userdata);
10079      so that applications can pass data to their callbacks:
10080      The PEM[_ASN1]_{read,write}... functions and macros now take an
10081      additional void * argument, which is just handed through whenever
10082      the password callback is called.
10083      [Damien Miller <dmiller@ilogic.com.au>; tiny changes by Bodo Moeller]
10084 
10085      New function SSL_CTX_set_default_passwd_cb_userdata.
10086 
10087      Compatibility note: As many C implementations push function arguments
10088      onto the stack in reverse order, the new library version is likely to
10089      interoperate with programs that have been compiled with the old
10090      pem_password_cb definition (PEM_whatever takes some data that
10091      happens to be on the stack as its last argument, and the callback
10092      just ignores this garbage); but there is no guarantee whatsoever that
10093      this will work.
10094 
10095   *) The -DPLATFORM="\"$(PLATFORM)\"" definition and the similar -DCFLAGS=...
10096      (both in crypto/Makefile.ssl for use by crypto/cversion.c) caused
10097      problems not only on Windows, but also on some Unix platforms.
10098      To avoid problematic command lines, these definitions are now in an
10099      auto-generated file crypto/buildinf.h (created by crypto/Makefile.ssl
10100      for standard "make" builds, by util/mk1mf.pl for "mk1mf" builds).
10101      [Bodo Moeller]
10102 
10103   *) MIPS III/IV assembler module is reimplemented.
10104      [Andy Polyakov]
10105 
10106   *) More DES library cleanups: remove references to srand/rand and
10107      delete an unused file.
10108      [Ulf Möller]
10109 
10110   *) Add support for the the free Netwide assembler (NASM) under Win32,
10111      since not many people have MASM (ml) and it can be hard to obtain.
10112      This is currently experimental but it seems to work OK and pass all
10113      the tests. Check out INSTALL.W32 for info.
10114      [Steve Henson]
10115 
10116   *) Fix memory leaks in s3_clnt.c: All non-anonymous SSL3/TLS1 connections
10117      without temporary keys kept an extra copy of the server key,
10118      and connections with temporary keys did not free everything in case
10119      of an error.
10120      [Bodo Moeller]
10121 
10122   *) New function RSA_check_key and new openssl rsa option -check
10123      for verifying the consistency of RSA keys.
10124      [Ulf Moeller, Bodo Moeller]
10125 
10126   *) Various changes to make Win32 compile work: 
10127      1. Casts to avoid "loss of data" warnings in p5_crpt2.c
10128      2. Change unsigned int to int in b_dump.c to avoid "signed/unsigned
10129         comparison" warnings.
10130      3. Add sk_<TYPE>_sort to DEF file generator and do make update.
10131      [Steve Henson]
10132 
10133   *) Add a debugging option to PKCS#5 v2 key generation function: when
10134      you #define DEBUG_PKCS5V2 passwords, salts, iteration counts and
10135      derived keys are printed to stderr.
10136      [Steve Henson]
10137 
10138   *) Copy the flags in ASN1_STRING_dup().
10139      [Roman E. Pavlov <pre@mo.msk.ru>]
10140 
10141   *) The x509 application mishandled signing requests containing DSA
10142      keys when the signing key was also DSA and the parameters didn't match.
10143 
10144      It was supposed to omit the parameters when they matched the signing key:
10145      the verifying software was then supposed to automatically use the CA's
10146      parameters if they were absent from the end user certificate.
10147 
10148      Omitting parameters is no longer recommended. The test was also
10149      the wrong way round! This was probably due to unusual behaviour in
10150      EVP_cmp_parameters() which returns 1 if the parameters match. 
10151      This meant that parameters were omitted when they *didn't* match and
10152      the certificate was useless. Certificates signed with 'ca' didn't have
10153      this bug.
10154      [Steve Henson, reported by Doug Erickson <Doug.Erickson@Part.NET>]
10155 
10156   *) Memory leak checking (-DCRYPTO_MDEBUG) had some problems.
10157      The interface is as follows:
10158      Applications can use
10159          CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON) aka MemCheck_start(),
10160          CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_OFF) aka MemCheck_stop();
10161      "off" is now the default.
10162      The library internally uses
10163          CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE) aka MemCheck_off(),
10164          CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE) aka MemCheck_on()
10165      to disable memory-checking temporarily.
10166 
10167      Some inconsistent states that previously were possible (and were
10168      even the default) are now avoided.
10169 
10170      -DCRYPTO_MDEBUG_TIME is new and additionally stores the current time
10171      with each memory chunk allocated; this is occasionally more helpful
10172      than just having a counter.
10173 
10174      -DCRYPTO_MDEBUG_THREAD is also new and adds the thread ID.
10175 
10176      -DCRYPTO_MDEBUG_ALL enables all of the above, plus any future
10177      extensions.
10178      [Bodo Moeller]
10179 
10180   *) Introduce "mode" for SSL structures (with defaults in SSL_CTX),
10181      which largely parallels "options", but is for changing API behaviour,
10182      whereas "options" are about protocol behaviour.
10183      Initial "mode" flags are:
10184 
10185      SSL_MODE_ENABLE_PARTIAL_WRITE   Allow SSL_write to report success when
10186                                      a single record has been written.
10187      SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER  Don't insist that SSL_write
10188                                      retries use the same buffer location.
10189                                      (But all of the contents must be
10190                                      copied!)
10191      [Bodo Moeller]
10192 
10193   *) Bugfix: SSL_set_options ignored its parameter, only SSL_CTX_set_options
10194      worked.
10195 
10196   *) Fix problems with no-hmac etc.
10197      [Ulf Möller, pointed out by Brian Wellington <bwelling@tislabs.com>]
10198 
10199   *) New functions RSA_get_default_method(), RSA_set_method() and
10200      RSA_get_method(). These allows replacement of RSA_METHODs without having
10201      to mess around with the internals of an RSA structure.
10202      [Steve Henson]
10203 
10204   *) Fix memory leaks in DSA_do_sign and DSA_is_prime.
10205      Also really enable memory leak checks in openssl.c and in some
10206      test programs.
10207      [Chad C. Mulligan, Bodo Moeller]
10208 
10209   *) Fix a bug in d2i_ASN1_INTEGER() and i2d_ASN1_INTEGER() which can mess
10210      up the length of negative integers. This has now been simplified to just
10211      store the length when it is first determined and use it later, rather
10212      than trying to keep track of where data is copied and updating it to
10213      point to the end.
10214      [Steve Henson, reported by Brien Wheeler
10215       <bwheeler@authentica-security.com>]
10216 
10217   *) Add a new function PKCS7_signatureVerify. This allows the verification
10218      of a PKCS#7 signature but with the signing certificate passed to the
10219      function itself. This contrasts with PKCS7_dataVerify which assumes the
10220      certificate is present in the PKCS#7 structure. This isn't always the
10221      case: certificates can be omitted from a PKCS#7 structure and be
10222      distributed by "out of band" means (such as a certificate database).
10223      [Steve Henson]
10224 
10225   *) Complete the PEM_* macros with DECLARE_PEM versions to replace the
10226      function prototypes in pem.h, also change util/mkdef.pl to add the
10227      necessary function names. 
10228      [Steve Henson]
10229 
10230   *) mk1mf.pl (used by Windows builds) did not properly read the
10231      options set by Configure in the top level Makefile, and Configure
10232      was not even able to write more than one option correctly.
10233      Fixed, now "no-idea no-rc5 -DCRYPTO_MDEBUG" etc. works as intended.
10234      [Bodo Moeller]
10235 
10236   *) New functions CONF_load_bio() and CONF_load_fp() to allow a config
10237      file to be loaded from a BIO or FILE pointer. The BIO version will
10238      for example allow memory BIOs to contain config info.
10239      [Steve Henson]
10240 
10241   *) New function "CRYPTO_num_locks" that returns CRYPTO_NUM_LOCKS.
10242      Whoever hopes to achieve shared-library compatibility across versions
10243      must use this, not the compile-time macro.
10244      (Exercise 0.9.4: Which is the minimum library version required by
10245      such programs?)
10246      Note: All this applies only to multi-threaded programs, others don't
10247      need locks.
10248      [Bodo Moeller]
10249 
10250   *) Add missing case to s3_clnt.c state machine -- one of the new SSL tests
10251      through a BIO pair triggered the default case, i.e.
10252      SSLerr(...,SSL_R_UNKNOWN_STATE).
10253      [Bodo Moeller]
10254 
10255   *) New "BIO pair" concept (crypto/bio/bss_bio.c) so that applications
10256      can use the SSL library even if none of the specific BIOs is
10257      appropriate.
10258      [Bodo Moeller]
10259 
10260   *) Fix a bug in i2d_DSAPublicKey() which meant it returned the wrong value
10261      for the encoded length.
10262      [Jeon KyoungHo <khjeon@sds.samsung.co.kr>]
10263 
10264   *) Add initial documentation of the X509V3 functions.
10265      [Steve Henson]
10266 
10267   *) Add a new pair of functions PEM_write_PKCS8PrivateKey() and 
10268      PEM_write_bio_PKCS8PrivateKey() that are equivalent to
10269      PEM_write_PrivateKey() and PEM_write_bio_PrivateKey() but use the more
10270      secure PKCS#8 private key format with a high iteration count.
10271      [Steve Henson]
10272 
10273   *) Fix determination of Perl interpreter: A perl or perl5
10274      _directory_ in $PATH was also accepted as the interpreter.
10275      [Ralf S. Engelschall]
10276 
10277   *) Fix demos/sign/sign.c: well there wasn't anything strictly speaking
10278      wrong with it but it was very old and did things like calling
10279      PEM_ASN1_read() directly and used MD5 for the hash not to mention some
10280      unusual formatting.
10281      [Steve Henson]
10282 
10283   *) Fix demos/selfsign.c: it used obsolete and deleted functions, changed
10284      to use the new extension code.
10285      [Steve Henson]
10286 
10287   *) Implement the PEM_read/PEM_write functions in crypto/pem/pem_all.c
10288      with macros. This should make it easier to change their form, add extra
10289      arguments etc. Fix a few PEM prototypes which didn't have cipher as a
10290      constant.
10291      [Steve Henson]
10292 
10293   *) Add to configuration table a new entry that can specify an alternative
10294      name for unistd.h (for pre-POSIX systems); we need this for NeXTstep,
10295      according to Mark Crispin <MRC@Panda.COM>.
10296      [Bodo Moeller]
10297 
10298 #if 0
10299   *) DES CBC did not update the IV. Weird.
10300      [Ben Laurie]
10301 #else
10302      des_cbc_encrypt does not update the IV, but des_ncbc_encrypt does.
10303      Changing the behaviour of the former might break existing programs --
10304      where IV updating is needed, des_ncbc_encrypt can be used.
10305 #endif
10306 
10307   *) When bntest is run from "make test" it drives bc to check its
10308      calculations, as well as internally checking them. If an internal check
10309      fails, it needs to cause bc to give a non-zero result or make test carries
10310      on without noticing the failure. Fixed.
10311      [Ben Laurie]
10312 
10313   *) DES library cleanups.
10314      [Ulf Möller]
10315 
10316   *) Add support for PKCS#5 v2.0 PBE algorithms. This will permit PKCS#8 to be
10317      used with any cipher unlike PKCS#5 v1.5 which can at most handle 64 bit
10318      ciphers. NOTE: although the key derivation function has been verified
10319      against some published test vectors it has not been extensively tested
10320      yet. Added a -v2 "cipher" option to pkcs8 application to allow the use
10321      of v2.0.
10322      [Steve Henson]
10323 
10324   *) Instead of "mkdir -p", which is not fully portable, use new
10325      Perl script "util/mkdir-p.pl".
10326      [Bodo Moeller]
10327 
10328   *) Rewrite the way password based encryption (PBE) is handled. It used to
10329      assume that the ASN1 AlgorithmIdentifier parameter was a PBEParameter
10330      structure. This was true for the PKCS#5 v1.5 and PKCS#12 PBE algorithms
10331      but doesn't apply to PKCS#5 v2.0 where it can be something else. Now
10332      the 'parameter' field of the AlgorithmIdentifier is passed to the
10333      underlying key generation function so it must do its own ASN1 parsing.
10334      This has also changed the EVP_PBE_CipherInit() function which now has a
10335      'parameter' argument instead of literal salt and iteration count values
10336      and the function EVP_PBE_ALGOR_CipherInit() has been deleted.
10337      [Steve Henson]
10338 
10339   *) Support for PKCS#5 v1.5 compatible password based encryption algorithms
10340      and PKCS#8 functionality. New 'pkcs8' application linked to openssl.
10341      Needed to change the PEM_STRING_EVP_PKEY value which was just "PRIVATE
10342      KEY" because this clashed with PKCS#8 unencrypted string. Since this
10343      value was just used as a "magic string" and not used directly its
10344      value doesn't matter.
10345      [Steve Henson]
10346 
10347   *) Introduce some semblance of const correctness to BN. Shame C doesn't
10348      support mutable.
10349      [Ben Laurie]
10350 
10351   *) "linux-sparc64" configuration (ultrapenguin).
10352      [Ray Miller <ray.miller@oucs.ox.ac.uk>]
10353      "linux-sparc" configuration.
10354      [Christian Forster <fo@hawo.stw.uni-erlangen.de>]
10355 
10356   *) config now generates no-xxx options for missing ciphers.
10357      [Ulf Möller]
10358 
10359   *) Support the EBCDIC character set (work in progress).
10360      File ebcdic.c not yet included because it has a different license.
10361      [Martin Kraemer <Martin.Kraemer@MchP.Siemens.De>]
10362 
10363   *) Support BS2000/OSD-POSIX.
10364      [Martin Kraemer <Martin.Kraemer@MchP.Siemens.De>]
10365 
10366   *) Make callbacks for key generation use void * instead of char *.
10367      [Ben Laurie]
10368 
10369   *) Make S/MIME samples compile (not yet tested).
10370      [Ben Laurie]
10371 
10372   *) Additional typesafe stacks.
10373      [Ben Laurie]
10374 
10375   *) New configuration variants "bsdi-elf-gcc" (BSD/OS 4.x).
10376      [Bodo Moeller]
10377 
10378 
10379  Changes between 0.9.3 and 0.9.3a  [29 May 1999]
10380 
10381   *) New configuration variant "sco5-gcc".
10382 
10383   *) Updated some demos.
10384      [Sean O Riordain, Wade Scholine]
10385 
10386   *) Add missing BIO_free at exit of pkcs12 application.
10387      [Wu Zhigang]
10388 
10389   *) Fix memory leak in conf.c.
10390      [Steve Henson]
10391 
10392   *) Updates for Win32 to assembler version of MD5.
10393      [Steve Henson]
10394 
10395   *) Set #! path to perl in apps/der_chop to where we found it
10396      instead of using a fixed path.
10397      [Bodo Moeller]
10398 
10399   *) SHA library changes for irix64-mips4-cc.
10400      [Andy Polyakov]
10401 
10402   *) Improvements for VMS support.
10403      [Richard Levitte]
10404 
10405 
10406  Changes between 0.9.2b and 0.9.3  [24 May 1999]
10407 
10408   *) Bignum library bug fix. IRIX 6 passes "make test" now!
10409      This also avoids the problems with SC4.2 and unpatched SC5.  
10410      [Andy Polyakov <appro@fy.chalmers.se>]
10411 
10412   *) New functions sk_num, sk_value and sk_set to replace the previous macros.
10413      These are required because of the typesafe stack would otherwise break 
10414      existing code. If old code used a structure member which used to be STACK
10415      and is now STACK_OF (for example cert in a PKCS7_SIGNED structure) with
10416      sk_num or sk_value it would produce an error because the num, data members
10417      are not present in STACK_OF. Now it just produces a warning. sk_set
10418      replaces the old method of assigning a value to sk_value
10419      (e.g. sk_value(x, i) = y) which the library used in a few cases. Any code
10420      that does this will no longer work (and should use sk_set instead) but
10421      this could be regarded as a "questionable" behaviour anyway.
10422      [Steve Henson]
10423 
10424   *) Fix most of the other PKCS#7 bugs. The "experimental" code can now
10425      correctly handle encrypted S/MIME data.
10426      [Steve Henson]
10427 
10428   *) Change type of various DES function arguments from des_cblock
10429      (which means, in function argument declarations, pointer to char)
10430      to des_cblock * (meaning pointer to array with 8 char elements),
10431      which allows the compiler to do more typechecking; it was like
10432      that back in SSLeay, but with lots of ugly casts.
10433 
10434      Introduce new type const_des_cblock.
10435      [Bodo Moeller]
10436 
10437   *) Reorganise the PKCS#7 library and get rid of some of the more obvious
10438      problems: find RecipientInfo structure that matches recipient certificate
10439      and initialise the ASN1 structures properly based on passed cipher.
10440      [Steve Henson]
10441 
10442   *) Belatedly make the BN tests actually check the results.
10443      [Ben Laurie]
10444 
10445   *) Fix the encoding and decoding of negative ASN1 INTEGERS and conversion
10446      to and from BNs: it was completely broken. New compilation option
10447      NEG_PUBKEY_BUG to allow for some broken certificates that encode public
10448      key elements as negative integers.
10449      [Steve Henson]
10450 
10451   *) Reorganize and speed up MD5.
10452      [Andy Polyakov <appro@fy.chalmers.se>]
10453 
10454   *) VMS support.
10455      [Richard Levitte <richard@levitte.org>]
10456 
10457   *) New option -out to asn1parse to allow the parsed structure to be
10458      output to a file. This is most useful when combined with the -strparse
10459      option to examine the output of things like OCTET STRINGS.
10460      [Steve Henson]
10461 
10462   *) Make SSL library a little more fool-proof by not requiring any longer
10463      that SSL_set_{accept,connect}_state be called before
10464      SSL_{accept,connect} may be used (SSL_set_..._state is omitted
10465      in many applications because usually everything *appeared* to work as
10466      intended anyway -- now it really works as intended).
10467      [Bodo Moeller]
10468 
10469   *) Move openssl.cnf out of lib/.
10470      [Ulf Möller]
10471 
10472   *) Fix various things to let OpenSSL even pass ``egcc -pipe -O2 -Wall
10473      -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes
10474      -Wmissing-declarations -Wnested-externs -Winline'' with EGCS 1.1.2+ 
10475      [Ralf S. Engelschall]
10476 
10477   *) Various fixes to the EVP and PKCS#7 code. It may now be able to
10478      handle PKCS#7 enveloped data properly.
10479      [Sebastian Akerman <sak@parallelconsulting.com>, modified by Steve]
10480 
10481   *) Create a duplicate of the SSL_CTX's CERT in SSL_new instead of
10482      copying pointers.  The cert_st handling is changed by this in
10483      various ways (and thus what used to be known as ctx->default_cert
10484      is now called ctx->cert, since we don't resort to s->ctx->[default_]cert
10485      any longer when s->cert does not give us what we need).
10486      ssl_cert_instantiate becomes obsolete by this change.
10487      As soon as we've got the new code right (possibly it already is?),
10488      we have solved a couple of bugs of the earlier code where s->cert
10489      was used as if it could not have been shared with other SSL structures.
10490 
10491      Note that using the SSL API in certain dirty ways now will result
10492      in different behaviour than observed with earlier library versions:
10493      Changing settings for an SSL_CTX *ctx after having done s = SSL_new(ctx)
10494      does not influence s as it used to.
10495      
10496      In order to clean up things more thoroughly, inside SSL_SESSION
10497      we don't use CERT any longer, but a new structure SESS_CERT
10498      that holds per-session data (if available); currently, this is
10499      the peer's certificate chain and, for clients, the server's certificate
10500      and temporary key.  CERT holds only those values that can have
10501      meaningful defaults in an SSL_CTX.
10502      [Bodo Moeller]
10503 
10504   *) New function X509V3_EXT_i2d() to create an X509_EXTENSION structure
10505      from the internal representation. Various PKCS#7 fixes: remove some
10506      evil casts and set the enc_dig_alg field properly based on the signing
10507      key type.
10508      [Steve Henson]
10509 
10510   *) Allow PKCS#12 password to be set from the command line or the
10511      environment. Let 'ca' get its config file name from the environment
10512      variables "OPENSSL_CONF" or "SSLEAY_CONF" (for consistency with 'req'
10513      and 'x509').
10514      [Steve Henson]
10515 
10516   *) Allow certificate policies extension to use an IA5STRING for the
10517      organization field. This is contrary to the PKIX definition but
10518      VeriSign uses it and IE5 only recognises this form. Document 'x509'
10519      extension option.
10520      [Steve Henson]
10521 
10522   *) Add PEDANTIC compiler flag to allow compilation with gcc -pedantic,
10523      without disallowing inline assembler and the like for non-pedantic builds.
10524      [Ben Laurie]
10525 
10526   *) Support Borland C++ builder.
10527      [Janez Jere <jj@void.si>, modified by Ulf Möller]
10528 
10529   *) Support Mingw32.
10530      [Ulf Möller]
10531 
10532   *) SHA-1 cleanups and performance enhancements.
10533      [Andy Polyakov <appro@fy.chalmers.se>]
10534 
10535   *) Sparc v8plus assembler for the bignum library.
10536      [Andy Polyakov <appro@fy.chalmers.se>]
10537 
10538   *) Accept any -xxx and +xxx compiler options in Configure.
10539      [Ulf Möller]
10540 
10541   *) Update HPUX configuration.
10542      [Anonymous]
10543   
10544   *) Add missing sk_<type>_unshift() function to safestack.h
10545      [Ralf S. Engelschall]
10546 
10547   *) New function SSL_CTX_use_certificate_chain_file that sets the
10548      "extra_cert"s in addition to the certificate.  (This makes sense
10549      only for "PEM" format files, as chains as a whole are not
10550      DER-encoded.)
10551      [Bodo Moeller]
10552 
10553   *) Support verify_depth from the SSL API.
10554      x509_vfy.c had what can be considered an off-by-one-error:
10555      Its depth (which was not part of the external interface)
10556      was actually counting the number of certificates in a chain;
10557      now it really counts the depth.
10558      [Bodo Moeller]
10559 
10560   *) Bugfix in crypto/x509/x509_cmp.c: The SSLerr macro was used
10561      instead of X509err, which often resulted in confusing error
10562      messages since the error codes are not globally unique
10563      (e.g. an alleged error in ssl3_accept when a certificate
10564      didn't match the private key).
10565 
10566   *) New function SSL_CTX_set_session_id_context that allows to set a default
10567      value (so that you don't need SSL_set_session_id_context for each
10568      connection using the SSL_CTX).
10569      [Bodo Moeller]
10570 
10571   *) OAEP decoding bug fix.
10572      [Ulf Möller]
10573 
10574   *) Support INSTALL_PREFIX for package builders, as proposed by
10575      David Harris.
10576      [Bodo Moeller]
10577 
10578   *) New Configure options "threads" and "no-threads".  For systems
10579      where the proper compiler options are known (currently Solaris
10580      and Linux), "threads" is the default.
10581      [Bodo Moeller]
10582 
10583   *) New script util/mklink.pl as a faster substitute for util/mklink.sh.
10584      [Bodo Moeller]
10585 
10586   *) Install various scripts to $(OPENSSLDIR)/misc, not to
10587      $(INSTALLTOP)/bin -- they shouldn't clutter directories
10588      such as /usr/local/bin.
10589      [Bodo Moeller]
10590 
10591   *) "make linux-shared" to build shared libraries.
10592      [Niels Poppe <niels@netbox.org>]
10593 
10594   *) New Configure option no-<cipher> (rsa, idea, rc5, ...).
10595      [Ulf Möller]
10596 
10597   *) Add the PKCS#12 API documentation to openssl.txt. Preliminary support for
10598      extension adding in x509 utility.
10599      [Steve Henson]
10600 
10601   *) Remove NOPROTO sections and error code comments.
10602      [Ulf Möller]
10603 
10604   *) Partial rewrite of the DEF file generator to now parse the ANSI
10605      prototypes.
10606      [Steve Henson]
10607 
10608   *) New Configure options --prefix=DIR and --openssldir=DIR.
10609      [Ulf Möller]
10610 
10611   *) Complete rewrite of the error code script(s). It is all now handled
10612      by one script at the top level which handles error code gathering,
10613      header rewriting and C source file generation. It should be much better
10614      than the old method: it now uses a modified version of Ulf's parser to
10615      read the ANSI prototypes in all header files (thus the old K&R definitions
10616      aren't needed for error creation any more) and do a better job of
10617      translating function codes into names. The old 'ASN1 error code imbedded
10618      in a comment' is no longer necessary and it doesn't use .err files which
10619      have now been deleted. Also the error code call doesn't have to appear all
10620      on one line (which resulted in some large lines...).
10621      [Steve Henson]
10622 
10623   *) Change #include filenames from <foo.h> to <openssl/foo.h>.
10624      [Bodo Moeller]
10625 
10626   *) Change behaviour of ssl2_read when facing length-0 packets: Don't return
10627      0 (which usually indicates a closed connection), but continue reading.
10628      [Bodo Moeller]
10629 
10630   *) Fix some race conditions.
10631      [Bodo Moeller]
10632 
10633   *) Add support for CRL distribution points extension. Add Certificate
10634      Policies and CRL distribution points documentation.
10635      [Steve Henson]
10636 
10637   *) Move the autogenerated header file parts to crypto/opensslconf.h.
10638      [Ulf Möller]
10639 
10640   *) Fix new 56-bit DES export ciphersuites: they were using 7 bytes instead of
10641      8 of keying material. Merlin has also confirmed interop with this fix
10642      between OpenSSL and Baltimore C/SSL 2.0 and J/SSL 2.0.
10643      [Merlin Hughes <merlin@baltimore.ie>]
10644 
10645   *) Fix lots of warnings.
10646      [Richard Levitte <levitte@stacken.kth.se>]
10647  
10648   *) In add_cert_dir() in crypto/x509/by_dir.c, break out of the loop if
10649      the directory spec didn't end with a LIST_SEPARATOR_CHAR.
10650      [Richard Levitte <levitte@stacken.kth.se>]
10651  
10652   *) Fix problems with sizeof(long) == 8.
10653      [Andy Polyakov <appro@fy.chalmers.se>]
10654 
10655   *) Change functions to ANSI C.
10656      [Ulf Möller]
10657 
10658   *) Fix typos in error codes.
10659      [Martin Kraemer <Martin.Kraemer@MchP.Siemens.De>, Ulf Möller]
10660 
10661   *) Remove defunct assembler files from Configure.
10662      [Ulf Möller]
10663 
10664   *) SPARC v8 assembler BIGNUM implementation.
10665      [Andy Polyakov <appro@fy.chalmers.se>]
10666 
10667   *) Support for Certificate Policies extension: both print and set.
10668      Various additions to support the r2i method this uses.
10669      [Steve Henson]
10670 
10671   *) A lot of constification, and fix a bug in X509_NAME_oneline() that could
10672      return a const string when you are expecting an allocated buffer.
10673      [Ben Laurie]
10674 
10675   *) Add support for ASN1 types UTF8String and VISIBLESTRING, also the CHOICE
10676      types DirectoryString and DisplayText.
10677      [Steve Henson]
10678 
10679   *) Add code to allow r2i extensions to access the configuration database,
10680      add an LHASH database driver and add several ctx helper functions.
10681      [Steve Henson]
10682 
10683   *) Fix an evil bug in bn_expand2() which caused various BN functions to
10684      fail when they extended the size of a BIGNUM.
10685      [Steve Henson]
10686 
10687   *) Various utility functions to handle SXNet extension. Modify mkdef.pl to
10688      support typesafe stack.
10689      [Steve Henson]
10690 
10691   *) Fix typo in SSL_[gs]et_options().
10692      [Nils Frostberg <nils@medcom.se>]
10693 
10694   *) Delete various functions and files that belonged to the (now obsolete)
10695      old X509V3 handling code.
10696      [Steve Henson]
10697 
10698   *) New Configure option "rsaref".
10699      [Ulf Möller]
10700 
10701   *) Don't auto-generate pem.h.
10702      [Bodo Moeller]
10703 
10704   *) Introduce type-safe ASN.1 SETs.
10705      [Ben Laurie]
10706 
10707   *) Convert various additional casted stacks to type-safe STACK_OF() variants.
10708      [Ben Laurie, Ralf S. Engelschall, Steve Henson]
10709 
10710   *) Introduce type-safe STACKs. This will almost certainly break lots of code
10711      that links with OpenSSL (well at least cause lots of warnings), but fear
10712      not: the conversion is trivial, and it eliminates loads of evil casts. A
10713      few STACKed things have been converted already. Feel free to convert more.
10714      In the fullness of time, I'll do away with the STACK type altogether.
10715      [Ben Laurie]
10716 
10717   *) Add `openssl ca -revoke <certfile>' facility which revokes a certificate
10718      specified in <certfile> by updating the entry in the index.txt file.
10719      This way one no longer has to edit the index.txt file manually for
10720      revoking a certificate. The -revoke option does the gory details now.
10721      [Massimiliano Pala <madwolf@openca.org>, Ralf S. Engelschall]
10722 
10723   *) Fix `openssl crl -noout -text' combination where `-noout' killed the
10724      `-text' option at all and this way the `-noout -text' combination was
10725      inconsistent in `openssl crl' with the friends in `openssl x509|rsa|dsa'.
10726      [Ralf S. Engelschall]
10727 
10728   *) Make sure a corresponding plain text error message exists for the
10729      X509_V_ERR_CERT_REVOKED/23 error number which can occur when a
10730      verify callback function determined that a certificate was revoked.
10731      [Ralf S. Engelschall]
10732 
10733   *) Bugfix: In test/testenc, don't test "openssl <cipher>" for
10734      ciphers that were excluded, e.g. by -DNO_IDEA.  Also, test
10735      all available cipers including rc5, which was forgotten until now.
10736      In order to let the testing shell script know which algorithms
10737      are available, a new (up to now undocumented) command
10738      "openssl list-cipher-commands" is used.
10739      [Bodo Moeller]
10740 
10741   *) Bugfix: s_client occasionally would sleep in select() when
10742      it should have checked SSL_pending() first.
10743      [Bodo Moeller]
10744 
10745   *) New functions DSA_do_sign and DSA_do_verify to provide access to
10746      the raw DSA values prior to ASN.1 encoding.
10747      [Ulf Möller]
10748 
10749   *) Tweaks to Configure
10750      [Niels Poppe <niels@netbox.org>]
10751 
10752   *) Add support for PKCS#5 v2.0 ASN1 PBES2 structures. No other support,
10753      yet...
10754      [Steve Henson]
10755 
10756   *) New variables $(RANLIB) and $(PERL) in the Makefiles.
10757      [Ulf Möller]
10758 
10759   *) New config option to avoid instructions that are illegal on the 80386.
10760      The default code is faster, but requires at least a 486.
10761      [Ulf Möller]
10762   
10763   *) Got rid of old SSL2_CLIENT_VERSION (inconsistently used) and
10764      SSL2_SERVER_VERSION (not used at all) macros, which are now the
10765      same as SSL2_VERSION anyway.
10766      [Bodo Moeller]
10767 
10768   *) New "-showcerts" option for s_client.
10769      [Bodo Moeller]
10770 
10771   *) Still more PKCS#12 integration. Add pkcs12 application to openssl
10772      application. Various cleanups and fixes.
10773      [Steve Henson]
10774 
10775   *) More PKCS#12 integration. Add new pkcs12 directory with Makefile.ssl and
10776      modify error routines to work internally. Add error codes and PBE init
10777      to library startup routines.
10778      [Steve Henson]
10779 
10780   *) Further PKCS#12 integration. Added password based encryption, PKCS#8 and
10781      packing functions to asn1 and evp. Changed function names and error
10782      codes along the way.
10783      [Steve Henson]
10784 
10785   *) PKCS12 integration: and so it begins... First of several patches to
10786      slowly integrate PKCS#12 functionality into OpenSSL. Add PKCS#12
10787      objects to objects.h
10788      [Steve Henson]
10789 
10790   *) Add a new 'indent' option to some X509V3 extension code. Initial ASN1
10791      and display support for Thawte strong extranet extension.
10792      [Steve Henson]
10793 
10794   *) Add LinuxPPC support.
10795      [Jeff Dubrule <igor@pobox.org>]
10796 
10797   *) Get rid of redundant BN file bn_mulw.c, and rename bn_div64 to
10798      bn_div_words in alpha.s.
10799      [Hannes Reinecke <H.Reinecke@hw.ac.uk> and Ben Laurie]
10800 
10801   *) Make sure the RSA OAEP test is skipped under -DRSAref because
10802      OAEP isn't supported when OpenSSL is built with RSAref.
10803      [Ulf Moeller <ulf@fitug.de>]
10804 
10805   *) Move definitions of IS_SET/IS_SEQUENCE inside crypto/asn1/asn1.h 
10806      so they no longer are missing under -DNOPROTO. 
10807      [Soren S. Jorvang <soren@t.dk>]
10808 
10809 
10810  Changes between 0.9.1c and 0.9.2b  [22 Mar 1999]
10811 
10812   *) Make SSL_get_peer_cert_chain() work in servers. Unfortunately, it still
10813      doesn't work when the session is reused. Coming soon!
10814      [Ben Laurie]
10815 
10816   *) Fix a security hole, that allows sessions to be reused in the wrong
10817      context thus bypassing client cert protection! All software that uses
10818      client certs and session caches in multiple contexts NEEDS PATCHING to
10819      allow session reuse! A fuller solution is in the works.
10820      [Ben Laurie, problem pointed out by Holger Reif, Bodo Moeller (and ???)]
10821 
10822   *) Some more source tree cleanups (removed obsolete files
10823      crypto/bf/asm/bf586.pl, test/test.txt and crypto/sha/asm/f.s; changed
10824      permission on "config" script to be executable) and a fix for the INSTALL
10825      document.
10826      [Ulf Moeller <ulf@fitug.de>]
10827 
10828   *) Remove some legacy and erroneous uses of malloc, free instead of
10829      Malloc, Free.
10830      [Lennart Bang <lob@netstream.se>, with minor changes by Steve]
10831 
10832   *) Make rsa_oaep_test return non-zero on error.
10833      [Ulf Moeller <ulf@fitug.de>]
10834 
10835   *) Add support for native Solaris shared libraries. Configure
10836      solaris-sparc-sc4-pic, make, then run shlib/solaris-sc4.sh. It'd be nice
10837      if someone would make that last step automatic.
10838      [Matthias Loepfe <Matthias.Loepfe@AdNovum.CH>]
10839 
10840   *) ctx_size was not built with the right compiler during "make links". Fixed.
10841      [Ben Laurie]
10842 
10843   *) Change the meaning of 'ALL' in the cipher list. It now means "everything
10844      except NULL ciphers". This means the default cipher list will no longer
10845      enable NULL ciphers. They need to be specifically enabled e.g. with
10846      the string "DEFAULT:eNULL".
10847      [Steve Henson]
10848 
10849   *) Fix to RSA private encryption routines: if p < q then it would
10850      occasionally produce an invalid result. This will only happen with
10851      externally generated keys because OpenSSL (and SSLeay) ensure p > q.
10852      [Steve Henson]
10853 
10854   *) Be less restrictive and allow also `perl util/perlpath.pl
10855      /path/to/bin/perl' in addition to `perl util/perlpath.pl /path/to/bin',
10856      because this way one can also use an interpreter named `perl5' (which is
10857      usually the name of Perl 5.xxx on platforms where an Perl 4.x is still
10858      installed as `perl').
10859      [Matthias Loepfe <Matthias.Loepfe@adnovum.ch>]
10860 
10861   *) Let util/clean-depend.pl work also with older Perl 5.00x versions.
10862      [Matthias Loepfe <Matthias.Loepfe@adnovum.ch>]
10863 
10864   *) Fix Makefile.org so CC,CFLAG etc are passed to 'make links' add
10865      advapi32.lib to Win32 build and change the pem test comparision
10866      to fc.exe (thanks to Ulrich Kroener <kroneru@yahoo.com> for the
10867      suggestion). Fix misplaced ASNI prototypes and declarations in evp.h
10868      and crypto/des/ede_cbcm_enc.c.
10869      [Steve Henson]
10870 
10871   *) DES quad checksum was broken on big-endian architectures. Fixed.
10872      [Ben Laurie]
10873 
10874   *) Comment out two functions in bio.h that aren't implemented. Fix up the
10875      Win32 test batch file so it (might) work again. The Win32 test batch file
10876      is horrible: I feel ill....
10877      [Steve Henson]
10878 
10879   *) Move various #ifdefs around so NO_SYSLOG, NO_DIRENT etc are now selected
10880      in e_os.h. Audit of header files to check ANSI and non ANSI
10881      sections: 10 functions were absent from non ANSI section and not exported
10882      from Windows DLLs. Fixed up libeay.num for new functions.
10883      [Steve Henson]
10884 
10885   *) Make `openssl version' output lines consistent.
10886      [Ralf S. Engelschall]
10887 
10888   *) Fix Win32 symbol export lists for BIO functions: Added
10889      BIO_get_ex_new_index, BIO_get_ex_num, BIO_get_ex_data and BIO_set_ex_data
10890      to ms/libeay{16,32}.def.
10891      [Ralf S. Engelschall]
10892 
10893   *) Second round of fixing the OpenSSL perl/ stuff. It now at least compiled
10894      fine under Unix and passes some trivial tests I've now added. But the
10895      whole stuff is horribly incomplete, so a README.1ST with a disclaimer was
10896      added to make sure no one expects that this stuff really works in the
10897      OpenSSL 0.9.2 release.  Additionally I've started to clean the XS sources
10898      up and fixed a few little bugs and inconsistencies in OpenSSL.{pm,xs} and
10899      openssl_bio.xs.
10900      [Ralf S. Engelschall]
10901 
10902   *) Fix the generation of two part addresses in perl.
10903      [Kenji Miyake <kenji@miyake.org>, integrated by Ben Laurie]
10904 
10905   *) Add config entry for Linux on MIPS.
10906      [John Tobey <jtobey@channel1.com>]
10907 
10908   *) Make links whenever Configure is run, unless we are on Windoze.
10909      [Ben Laurie]
10910 
10911   *) Permit extensions to be added to CRLs using crl_section in openssl.cnf.
10912      Currently only issuerAltName and AuthorityKeyIdentifier make any sense
10913      in CRLs.
10914      [Steve Henson]
10915 
10916   *) Add a useful kludge to allow package maintainers to specify compiler and
10917      other platforms details on the command line without having to patch the
10918      Configure script everytime: One now can use ``perl Configure
10919      <id>:<details>'', i.e. platform ids are allowed to have details appended
10920      to them (seperated by colons). This is treated as there would be a static
10921      pre-configured entry in Configure's %table under key <id> with value
10922      <details> and ``perl Configure <id>'' is called.  So, when you want to
10923      perform a quick test-compile under FreeBSD 3.1 with pgcc and without
10924      assembler stuff you can use ``perl Configure "FreeBSD-elf:pgcc:-O6:::"''
10925      now, which overrides the FreeBSD-elf entry on-the-fly.
10926      [Ralf S. Engelschall]
10927 
10928   *) Disable new TLS1 ciphersuites by default: they aren't official yet.
10929      [Ben Laurie]
10930 
10931   *) Allow DSO flags like -fpic, -fPIC, -KPIC etc. to be specified
10932      on the `perl Configure ...' command line. This way one can compile
10933      OpenSSL libraries with Position Independent Code (PIC) which is needed
10934      for linking it into DSOs.
10935      [Ralf S. Engelschall]
10936 
10937   *) Remarkably, export ciphers were totally broken and no-one had noticed!
10938      Fixed.
10939      [Ben Laurie]
10940 
10941   *) Cleaned up the LICENSE document: The official contact for any license
10942      questions now is the OpenSSL core team under openssl-core@openssl.org.
10943      And add a paragraph about the dual-license situation to make sure people
10944      recognize that _BOTH_ the OpenSSL license _AND_ the SSLeay license apply
10945      to the OpenSSL toolkit.
10946      [Ralf S. Engelschall]
10947 
10948   *) General source tree makefile cleanups: Made `making xxx in yyy...'
10949      display consistent in the source tree and replaced `/bin/rm' by `rm'.
10950      Additonally cleaned up the `make links' target: Remove unnecessary
10951      semicolons, subsequent redundant removes, inline point.sh into mklink.sh
10952      to speed processing and no longer clutter the display with confusing
10953      stuff. Instead only the actually done links are displayed.
10954      [Ralf S. Engelschall]
10955 
10956   *) Permit null encryption ciphersuites, used for authentication only. It used
10957      to be necessary to set the preprocessor define SSL_ALLOW_ENULL to do this.
10958      It is now necessary to set SSL_FORBID_ENULL to prevent the use of null
10959      encryption.
10960      [Ben Laurie]
10961 
10962   *) Add a bunch of fixes to the PKCS#7 stuff. It used to sometimes reorder
10963      signed attributes when verifying signatures (this would break them), 
10964      the detached data encoding was wrong and public keys obtained using
10965      X509_get_pubkey() weren't freed.
10966      [Steve Henson]
10967 
10968   *) Add text documentation for the BUFFER functions. Also added a work around
10969      to a Win95 console bug. This was triggered by the password read stuff: the
10970      last character typed gets carried over to the next fread(). If you were 
10971      generating a new cert request using 'req' for example then the last
10972      character of the passphrase would be CR which would then enter the first
10973      field as blank.
10974      [Steve Henson]
10975 
10976   *) Added the new `Includes OpenSSL Cryptography Software' button as
10977      doc/openssl_button.{gif,html} which is similar in style to the old SSLeay
10978      button and can be used by applications based on OpenSSL to show the
10979      relationship to the OpenSSL project.  
10980      [Ralf S. Engelschall]
10981 
10982   *) Remove confusing variables in function signatures in files
10983      ssl/ssl_lib.c and ssl/ssl.h.
10984      [Lennart Bong <lob@kulthea.stacken.kth.se>]
10985 
10986   *) Don't install bss_file.c under PREFIX/include/
10987      [Lennart Bong <lob@kulthea.stacken.kth.se>]
10988 
10989   *) Get the Win32 compile working again. Modify mkdef.pl so it can handle
10990      functions that return function pointers and has support for NT specific
10991      stuff. Fix mk1mf.pl and VC-32.pl to support NT differences also. Various
10992      #ifdef WIN32 and WINNTs sprinkled about the place and some changes from
10993      unsigned to signed types: this was killing the Win32 compile.
10994      [Steve Henson]
10995 
10996   *) Add new certificate file to stack functions,
10997      SSL_add_dir_cert_subjects_to_stack() and
10998      SSL_add_file_cert_subjects_to_stack().  These largely supplant
10999      SSL_load_client_CA_file(), and can be used to add multiple certs easily
11000      to a stack (usually this is then handed to SSL_CTX_set_client_CA_list()).
11001      This means that Apache-SSL and similar packages don't have to mess around
11002      to add as many CAs as they want to the preferred list.
11003      [Ben Laurie]
11004 
11005   *) Experiment with doxygen documentation. Currently only partially applied to
11006      ssl/ssl_lib.c.
11007      See http://www.stack.nl/~dimitri/doxygen/index.html, and run doxygen with
11008      openssl.doxy as the configuration file.
11009      [Ben Laurie]
11010   
11011   *) Get rid of remaining C++-style comments which strict C compilers hate.
11012      [Ralf S. Engelschall, pointed out by Carlos Amengual]
11013 
11014   *) Changed BN_RECURSION in bn_mont.c to BN_RECURSION_MONT so it is not
11015      compiled in by default: it has problems with large keys.
11016      [Steve Henson]
11017 
11018   *) Add a bunch of SSL_xxx() functions for configuring the temporary RSA and
11019      DH private keys and/or callback functions which directly correspond to
11020      their SSL_CTX_xxx() counterparts but work on a per-connection basis. This
11021      is needed for applications which have to configure certificates on a
11022      per-connection basis (e.g. Apache+mod_ssl) instead of a per-context basis
11023      (e.g. s_server). 
11024         For the RSA certificate situation is makes no difference, but
11025      for the DSA certificate situation this fixes the "no shared cipher"
11026      problem where the OpenSSL cipher selection procedure failed because the
11027      temporary keys were not overtaken from the context and the API provided
11028      no way to reconfigure them. 
11029         The new functions now let applications reconfigure the stuff and they
11030      are in detail: SSL_need_tmp_RSA, SSL_set_tmp_rsa, SSL_set_tmp_dh,
11031      SSL_set_tmp_rsa_callback and SSL_set_tmp_dh_callback.  Additionally a new
11032      non-public-API function ssl_cert_instantiate() is used as a helper
11033      function and also to reduce code redundancy inside ssl_rsa.c.
11034      [Ralf S. Engelschall]
11035 
11036   *) Move s_server -dcert and -dkey options out of the undocumented feature
11037      area because they are useful for the DSA situation and should be
11038      recognized by the users.
11039      [Ralf S. Engelschall]
11040 
11041   *) Fix the cipher decision scheme for export ciphers: the export bits are
11042      *not* within SSL_MKEY_MASK or SSL_AUTH_MASK, they are within
11043      SSL_EXP_MASK.  So, the original variable has to be used instead of the
11044      already masked variable.
11045      [Richard Levitte <levitte@stacken.kth.se>]
11046 
11047   *) Fix 'port' variable from `int' to `unsigned int' in crypto/bio/b_sock.c
11048      [Richard Levitte <levitte@stacken.kth.se>]
11049 
11050   *) Change type of another md_len variable in pk7_doit.c:PKCS7_dataFinal()
11051      from `int' to `unsigned int' because it's a length and initialized by
11052      EVP_DigestFinal() which expects an `unsigned int *'.
11053      [Richard Levitte <levitte@stacken.kth.se>]
11054 
11055   *) Don't hard-code path to Perl interpreter on shebang line of Configure
11056      script. Instead use the usual Shell->Perl transition trick.
11057      [Ralf S. Engelschall]
11058 
11059   *) Make `openssl x509 -noout -modulus' functional also for DSA certificates
11060      (in addition to RSA certificates) to match the behaviour of `openssl dsa
11061      -noout -modulus' as it's already the case for `openssl rsa -noout
11062      -modulus'.  For RSA the -modulus is the real "modulus" while for DSA
11063      currently the public key is printed (a decision which was already done by
11064      `openssl dsa -modulus' in the past) which serves a similar purpose.
11065      Additionally the NO_RSA no longer completely removes the whole -modulus
11066      option; it now only avoids using the RSA stuff. Same applies to NO_DSA
11067      now, too.
11068      [Ralf S.  Engelschall]
11069 
11070   *) Add Arne Ansper's reliable BIO - this is an encrypted, block-digested
11071      BIO. See the source (crypto/evp/bio_ok.c) for more info.
11072      [Arne Ansper <arne@ats.cyber.ee>]
11073 
11074   *) Dump the old yucky req code that tried (and failed) to allow raw OIDs
11075      to be added. Now both 'req' and 'ca' can use new objects defined in the
11076      config file.
11077      [Steve Henson]
11078 
11079   *) Add cool BIO that does syslog (or event log on NT).
11080      [Arne Ansper <arne@ats.cyber.ee>, integrated by Ben Laurie]
11081 
11082   *) Add support for new TLS ciphersuites, TLS_RSA_EXPORT56_WITH_RC4_56_MD5,
11083      TLS_RSA_EXPORT56_WITH_RC2_CBC_56_MD5 and
11084      TLS_RSA_EXPORT56_WITH_DES_CBC_SHA, as specified in "56-bit Export Cipher
11085      Suites For TLS", draft-ietf-tls-56-bit-ciphersuites-00.txt.
11086      [Ben Laurie]
11087 
11088   *) Add preliminary config info for new extension code.
11089      [Steve Henson]
11090 
11091   *) Make RSA_NO_PADDING really use no padding.
11092      [Ulf Moeller <ulf@fitug.de>]
11093 
11094   *) Generate errors when private/public key check is done.
11095      [Ben Laurie]
11096 
11097   *) Overhaul for 'crl' utility. New function X509_CRL_print. Partial support
11098      for some CRL extensions and new objects added.
11099      [Steve Henson]
11100 
11101   *) Really fix the ASN1 IMPLICIT bug this time... Partial support for private
11102      key usage extension and fuller support for authority key id.
11103      [Steve Henson]
11104 
11105   *) Add OAEP encryption for the OpenSSL crypto library. OAEP is the improved
11106      padding method for RSA, which is recommended for new applications in PKCS
11107      #1 v2.0 (RFC 2437, October 1998).
11108      OAEP (Optimal Asymmetric Encryption Padding) has better theoretical
11109      foundations than the ad-hoc padding used in PKCS #1 v1.5. It is secure
11110      against Bleichbacher's attack on RSA.
11111      [Ulf Moeller <ulf@fitug.de>, reformatted, corrected and integrated by
11112       Ben Laurie]
11113 
11114   *) Updates to the new SSL compression code
11115      [Eric A. Young, (from changes to C2Net SSLeay, integrated by Mark Cox)]
11116 
11117   *) Fix so that the version number in the master secret, when passed
11118      via RSA, checks that if TLS was proposed, but we roll back to SSLv3
11119      (because the server will not accept higher), that the version number
11120      is 0x03,0x01, not 0x03,0x00
11121      [Eric A. Young, (from changes to C2Net SSLeay, integrated by Mark Cox)]
11122 
11123   *) Run extensive memory leak checks on SSL apps. Fixed *lots* of memory
11124      leaks in ssl/ relating to new X509_get_pubkey() behaviour. Also fixes
11125      in apps/ and an unrelated leak in crypto/dsa/dsa_vrf.c
11126      [Steve Henson]
11127 
11128   *) Support for RAW extensions where an arbitrary extension can be
11129      created by including its DER encoding. See apps/openssl.cnf for
11130      an example.
11131      [Steve Henson]
11132 
11133   *) Make sure latest Perl versions don't interpret some generated C array
11134      code as Perl array code in the crypto/err/err_genc.pl script.
11135      [Lars Weber <3weber@informatik.uni-hamburg.de>]
11136 
11137   *) Modify ms/do_ms.bat to not generate assembly language makefiles since
11138      not many people have the assembler. Various Win32 compilation fixes and
11139      update to the INSTALL.W32 file with (hopefully) more accurate Win32
11140      build instructions.
11141      [Steve Henson]
11142 
11143   *) Modify configure script 'Configure' to automatically create crypto/date.h
11144      file under Win32 and also build pem.h from pem.org. New script
11145      util/mkfiles.pl to create the MINFO file on environments that can't do a
11146      'make files': perl util/mkfiles.pl >MINFO should work.
11147      [Steve Henson]
11148 
11149   *) Major rework of DES function declarations, in the pursuit of correctness
11150      and purity. As a result, many evil casts evaporated, and some weirdness,
11151      too. You may find this causes warnings in your code. Zapping your evil
11152      casts will probably fix them. Mostly.
11153      [Ben Laurie]
11154 
11155   *) Fix for a typo in asn1.h. Bug fix to object creation script
11156      obj_dat.pl. It considered a zero in an object definition to mean
11157      "end of object": none of the objects in objects.h have any zeros
11158      so it wasn't spotted.
11159      [Steve Henson, reported by Erwann ABALEA <eabalea@certplus.com>]
11160 
11161   *) Add support for Triple DES Cipher Block Chaining with Output Feedback
11162      Masking (CBCM). In the absence of test vectors, the best I have been able
11163      to do is check that the decrypt undoes the encrypt, so far. Send me test
11164      vectors if you have them.
11165      [Ben Laurie]
11166 
11167   *) Correct calculation of key length for export ciphers (too much space was
11168      allocated for null ciphers). This has not been tested!
11169      [Ben Laurie]
11170 
11171   *) Modifications to the mkdef.pl for Win32 DEF file creation. The usage
11172      message is now correct (it understands "crypto" and "ssl" on its
11173      command line). There is also now an "update" option. This will update
11174      the util/ssleay.num and util/libeay.num files with any new functions.
11175      If you do a: 
11176      perl util/mkdef.pl crypto ssl update
11177      it will update them.
11178      [Steve Henson]
11179 
11180   *) Overhauled the Perl interface (perl/*):
11181      - ported BN stuff to OpenSSL's different BN library
11182      - made the perl/ source tree CVS-aware
11183      - renamed the package from SSLeay to OpenSSL (the files still contain
11184        their history because I've copied them in the repository)
11185      - removed obsolete files (the test scripts will be replaced
11186        by better Test::Harness variants in the future)
11187      [Ralf S. Engelschall]
11188 
11189   *) First cut for a very conservative source tree cleanup:
11190      1. merge various obsolete readme texts into doc/ssleay.txt
11191      where we collect the old documents and readme texts.
11192      2. remove the first part of files where I'm already sure that we no
11193      longer need them because of three reasons: either they are just temporary
11194      files which were left by Eric or they are preserved original files where
11195      I've verified that the diff is also available in the CVS via "cvs diff
11196      -rSSLeay_0_8_1b" or they were renamed (as it was definitely the case for
11197      the crypto/md/ stuff).
11198      [Ralf S. Engelschall]
11199 
11200   *) More extension code. Incomplete support for subject and issuer alt
11201      name, issuer and authority key id. Change the i2v function parameters
11202      and add an extra 'crl' parameter in the X509V3_CTX structure: guess
11203      what that's for :-) Fix to ASN1 macro which messed up
11204      IMPLICIT tag and add f_enum.c which adds a2i, i2a for ENUMERATED.
11205      [Steve Henson]
11206 
11207   *) Preliminary support for ENUMERATED type. This is largely copied from the
11208      INTEGER code.
11209      [Steve Henson]
11210 
11211   *) Add new function, EVP_MD_CTX_copy() to replace frequent use of memcpy.
11212      [Eric A. Young, (from changes to C2Net SSLeay, integrated by Mark Cox)]
11213 
11214   *) Make sure `make rehash' target really finds the `openssl' program.
11215      [Ralf S. Engelschall, Matthias Loepfe <Matthias.Loepfe@adnovum.ch>]
11216 
11217   *) Squeeze another 7% of speed out of MD5 assembler, at least on a P2. I'd
11218      like to hear about it if this slows down other processors.
11219      [Ben Laurie]
11220 
11221   *) Add CygWin32 platform information to Configure script.
11222      [Alan Batie <batie@aahz.jf.intel.com>]
11223 
11224   *) Fixed ms/32all.bat script: `no_asm' -> `no-asm'
11225      [Rainer W. Gerling <gerling@mpg-gv.mpg.de>]
11226   
11227   *) New program nseq to manipulate netscape certificate sequences
11228      [Steve Henson]
11229 
11230   *) Modify crl2pkcs7 so it supports multiple -certfile arguments. Fix a
11231      few typos.
11232      [Steve Henson]
11233 
11234   *) Fixes to BN code.  Previously the default was to define BN_RECURSION
11235      but the BN code had some problems that would cause failures when
11236      doing certificate verification and some other functions.
11237      [Eric A. Young, (from changes to C2Net SSLeay, integrated by Mark Cox)]
11238 
11239   *) Add ASN1 and PEM code to support netscape certificate sequences.
11240      [Steve Henson]
11241 
11242   *) Add ASN1 and PEM code to support netscape certificate sequences.
11243      [Steve Henson]
11244 
11245   *) Add several PKIX and private extended key usage OIDs.
11246      [Steve Henson]
11247 
11248   *) Modify the 'ca' program to handle the new extension code. Modify
11249      openssl.cnf for new extension format, add comments.
11250      [Steve Henson]
11251 
11252   *) More X509 V3 changes. Fix typo in v3_bitstr.c. Add support to 'req'
11253      and add a sample to openssl.cnf so req -x509 now adds appropriate
11254      CA extensions.
11255      [Steve Henson]
11256 
11257   *) Continued X509 V3 changes. Add to other makefiles, integrate with the
11258      error code, add initial support to X509_print() and x509 application.
11259      [Steve Henson]
11260 
11261   *) Takes a deep breath and start addding X509 V3 extension support code. Add
11262      files in crypto/x509v3. Move original stuff to crypto/x509v3/old. All this
11263      stuff is currently isolated and isn't even compiled yet.
11264      [Steve Henson]
11265 
11266   *) Continuing patches for GeneralizedTime. Fix up certificate and CRL
11267      ASN1 to use ASN1_TIME and modify print routines to use ASN1_TIME_print.
11268      Removed the versions check from X509 routines when loading extensions:
11269      this allows certain broken certificates that don't set the version
11270      properly to be processed.
11271      [Steve Henson]
11272 
11273   *) Deal with irritating shit to do with dependencies, in YAAHW (Yet Another
11274      Ad Hoc Way) - Makefile.ssls now all contain local dependencies, which
11275      can still be regenerated with "make depend".
11276      [Ben Laurie]
11277 
11278   *) Spelling mistake in C version of CAST-128.
11279      [Ben Laurie, reported by Jeremy Hylton <jeremy@cnri.reston.va.us>]
11280 
11281   *) Changes to the error generation code. The perl script err-code.pl 
11282      now reads in the old error codes and retains the old numbers, only
11283      adding new ones if necessary. It also only changes the .err files if new
11284      codes are added. The makefiles have been modified to only insert errors
11285      when needed (to avoid needlessly modifying header files). This is done
11286      by only inserting errors if the .err file is newer than the auto generated
11287      C file. To rebuild all the error codes from scratch (the old behaviour)
11288      either modify crypto/Makefile.ssl to pass the -regen flag to err_code.pl
11289      or delete all the .err files.
11290      [Steve Henson]
11291 
11292   *) CAST-128 was incorrectly implemented for short keys. The C version has
11293      been fixed, but is untested. The assembler versions are also fixed, but
11294      new assembler HAS NOT BEEN GENERATED FOR WIN32 - the Makefile needs fixing
11295      to regenerate it if needed.
11296      [Ben Laurie, reported (with fix for C version) by Jun-ichiro itojun
11297       Hagino <itojun@kame.net>]
11298 
11299   *) File was opened incorrectly in randfile.c.
11300      [Ulf Möller <ulf@fitug.de>]
11301 
11302   *) Beginning of support for GeneralizedTime. d2i, i2d, check and print
11303      functions. Also ASN1_TIME suite which is a CHOICE of UTCTime or
11304      GeneralizedTime. ASN1_TIME is the proper type used in certificates et
11305      al: it's just almost always a UTCTime. Note this patch adds new error
11306      codes so do a "make errors" if there are problems.
11307      [Steve Henson]
11308 
11309   *) Correct Linux 1 recognition in config.
11310      [Ulf Möller <ulf@fitug.de>]
11311 
11312   *) Remove pointless MD5 hash when using DSA keys in ca.
11313      [Anonymous <nobody@replay.com>]
11314 
11315   *) Generate an error if given an empty string as a cert directory. Also
11316      generate an error if handed NULL (previously returned 0 to indicate an
11317      error, but didn't set one).
11318      [Ben Laurie, reported by Anonymous <nobody@replay.com>]
11319 
11320   *) Add prototypes to SSL methods. Make SSL_write's buffer const, at last.
11321      [Ben Laurie]
11322 
11323   *) Fix the dummy function BN_ref_mod_exp() in rsaref.c to have the correct
11324      parameters. This was causing a warning which killed off the Win32 compile.
11325      [Steve Henson]
11326 
11327   *) Remove C++ style comments from crypto/bn/bn_local.h.
11328      [Neil Costigan <neil.costigan@celocom.com>]
11329 
11330   *) The function OBJ_txt2nid was broken. It was supposed to return a nid
11331      based on a text string, looking up short and long names and finally
11332      "dot" format. The "dot" format stuff didn't work. Added new function
11333      OBJ_txt2obj to do the same but return an ASN1_OBJECT and rewrote 
11334      OBJ_txt2nid to use it. OBJ_txt2obj can also return objects even if the
11335      OID is not part of the table.
11336      [Steve Henson]
11337 
11338   *) Add prototypes to X509 lookup/verify methods, fixing a bug in
11339      X509_LOOKUP_by_alias().
11340      [Ben Laurie]
11341 
11342   *) Sort openssl functions by name.
11343      [Ben Laurie]
11344 
11345   *) Get the gendsa program working (hopefully) and add it to app list. Remove
11346      encryption from sample DSA keys (in case anyone is interested the password
11347      was "1234").
11348      [Steve Henson]
11349 
11350   *) Make _all_ *_free functions accept a NULL pointer.
11351      [Frans Heymans <fheymans@isaserver.be>]
11352 
11353   *) If a DH key is generated in s3_srvr.c, don't blow it by trying to use
11354      NULL pointers.
11355      [Anonymous <nobody@replay.com>]
11356 
11357   *) s_server should send the CAfile as acceptable CAs, not its own cert.
11358      [Bodo Moeller <3moeller@informatik.uni-hamburg.de>]
11359 
11360   *) Don't blow it for numeric -newkey arguments to apps/req.
11361      [Bodo Moeller <3moeller@informatik.uni-hamburg.de>]
11362 
11363   *) Temp key "for export" tests were wrong in s3_srvr.c.
11364      [Anonymous <nobody@replay.com>]
11365 
11366   *) Add prototype for temp key callback functions
11367      SSL_CTX_set_tmp_{rsa,dh}_callback().
11368      [Ben Laurie]
11369 
11370   *) Make DH_free() tolerate being passed a NULL pointer (like RSA_free() and
11371      DSA_free()). Make X509_PUBKEY_set() check for errors in d2i_PublicKey().
11372      [Steve Henson]
11373 
11374   *) X509_name_add_entry() freed the wrong thing after an error.
11375      [Arne Ansper <arne@ats.cyber.ee>]
11376 
11377   *) rsa_eay.c would attempt to free a NULL context.
11378      [Arne Ansper <arne@ats.cyber.ee>]
11379 
11380   *) BIO_s_socket() had a broken should_retry() on Windoze.
11381      [Arne Ansper <arne@ats.cyber.ee>]
11382 
11383   *) BIO_f_buffer() didn't pass on BIO_CTRL_FLUSH.
11384      [Arne Ansper <arne@ats.cyber.ee>]
11385 
11386   *) Make sure the already existing X509_STORE->depth variable is initialized
11387      in X509_STORE_new(), but document the fact that this variable is still
11388      unused in the certificate verification process.
11389      [Ralf S. Engelschall]
11390 
11391   *) Fix the various library and apps files to free up pkeys obtained from
11392      X509_PUBKEY_get() et al. Also allow x509.c to handle netscape extensions.
11393      [Steve Henson]
11394 
11395   *) Fix reference counting in X509_PUBKEY_get(). This makes
11396      demos/maurice/example2.c work, amongst others, probably.
11397      [Steve Henson and Ben Laurie]
11398 
11399   *) First cut of a cleanup for apps/. First the `ssleay' program is now named
11400      `openssl' and second, the shortcut symlinks for the `openssl <command>'
11401      are no longer created. This way we have a single and consistent command
11402      line interface `openssl <command>', similar to `cvs <command>'.
11403      [Ralf S. Engelschall, Paul Sutton and Ben Laurie]
11404 
11405   *) ca.c: move test for DSA keys inside #ifndef NO_DSA. Make pubkey
11406      BIT STRING wrapper always have zero unused bits.
11407      [Steve Henson]
11408 
11409   *) Add CA.pl, perl version of CA.sh, add extended key usage OID.
11410      [Steve Henson]
11411 
11412   *) Make the top-level INSTALL documentation easier to understand.
11413      [Paul Sutton]
11414 
11415   *) Makefiles updated to exit if an error occurs in a sub-directory
11416      make (including if user presses ^C) [Paul Sutton]
11417 
11418   *) Make Montgomery context stuff explicit in RSA data structure.
11419      [Ben Laurie]
11420 
11421   *) Fix build order of pem and err to allow for generated pem.h.
11422      [Ben Laurie]
11423 
11424   *) Fix renumbering bug in X509_NAME_delete_entry().
11425      [Ben Laurie]
11426 
11427   *) Enhanced the err-ins.pl script so it makes the error library number 
11428      global and can add a library name. This is needed for external ASN1 and
11429      other error libraries.
11430      [Steve Henson]
11431 
11432   *) Fixed sk_insert which never worked properly.
11433      [Steve Henson]
11434 
11435   *) Fix ASN1 macros so they can handle indefinite length construted 
11436      EXPLICIT tags. Some non standard certificates use these: they can now
11437      be read in.
11438      [Steve Henson]
11439 
11440   *) Merged the various old/obsolete SSLeay documentation files (doc/xxx.doc)
11441      into a single doc/ssleay.txt bundle. This way the information is still
11442      preserved but no longer messes up this directory. Now it's new room for
11443      the new set of documenation files.
11444      [Ralf S. Engelschall]
11445 
11446   *) SETs were incorrectly DER encoded. This was a major pain, because they
11447      shared code with SEQUENCEs, which aren't coded the same. This means that
11448      almost everything to do with SETs or SEQUENCEs has either changed name or
11449      number of arguments.
11450      [Ben Laurie, based on a partial fix by GP Jayan <gp@nsj.co.jp>]
11451 
11452   *) Fix test data to work with the above.
11453      [Ben Laurie]
11454 
11455   *) Fix the RSA header declarations that hid a bug I fixed in 0.9.0b but
11456      was already fixed by Eric for 0.9.1 it seems.
11457      [Ben Laurie - pointed out by Ulf Möller <ulf@fitug.de>]
11458 
11459   *) Autodetect FreeBSD3.
11460      [Ben Laurie]
11461 
11462   *) Fix various bugs in Configure. This affects the following platforms:
11463      nextstep
11464      ncr-scde
11465      unixware-2.0
11466      unixware-2.0-pentium
11467      sco5-cc.
11468      [Ben Laurie]
11469 
11470   *) Eliminate generated files from CVS. Reorder tests to regenerate files
11471      before they are needed.
11472      [Ben Laurie]
11473 
11474   *) Generate Makefile.ssl from Makefile.org (to keep CVS happy).
11475      [Ben Laurie]
11476 
11477 
11478  Changes between 0.9.1b and 0.9.1c  [23-Dec-1998]
11479 
11480   *) Added OPENSSL_VERSION_NUMBER to crypto/crypto.h and 
11481      changed SSLeay to OpenSSL in version strings.
11482      [Ralf S. Engelschall]
11483   
11484   *) Some fixups to the top-level documents.
11485      [Paul Sutton]
11486 
11487   *) Fixed the nasty bug where rsaref.h was not found under compile-time
11488      because the symlink to include/ was missing.
11489      [Ralf S. Engelschall]
11490 
11491   *) Incorporated the popular no-RSA/DSA-only patches 
11492      which allow to compile a RSA-free SSLeay.
11493      [Andrew Cooke / Interrader Ldt., Ralf S. Engelschall]
11494 
11495   *) Fixed nasty rehash problem under `make -f Makefile.ssl links'
11496      when "ssleay" is still not found.
11497      [Ralf S. Engelschall]
11498 
11499   *) Added more platforms to Configure: Cray T3E, HPUX 11, 
11500      [Ralf S. Engelschall, Beckmann <beckman@acl.lanl.gov>]
11501 
11502   *) Updated the README file.
11503      [Ralf S. Engelschall]
11504 
11505   *) Added various .cvsignore files in the CVS repository subdirs
11506      to make a "cvs update" really silent.
11507