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Member "openssl-1.0.2q/crypto/asn1/a_dup.c" (20 Nov 2018, 4406 Bytes) of package /linux/misc/openssl-1.0.2q.tar.gz:


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    1 /* crypto/asn1/a_dup.c */
    2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
    3  * All rights reserved.
    4  *
    5  * This package is an SSL implementation written
    6  * by Eric Young (eay@cryptsoft.com).
    7  * The implementation was written so as to conform with Netscapes SSL.
    8  *
    9  * This library is free for commercial and non-commercial use as long as
   10  * the following conditions are aheared to.  The following conditions
   11  * apply to all code found in this distribution, be it the RC4, RSA,
   12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   13  * included with this distribution is covered by the same copyright terms
   14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   15  *
   16  * Copyright remains Eric Young's, and as such any Copyright notices in
   17  * the code are not to be removed.
   18  * If this package is used in a product, Eric Young should be given attribution
   19  * as the author of the parts of the library used.
   20  * This can be in the form of a textual message at program startup or
   21  * in documentation (online or textual) provided with the package.
   22  *
   23  * Redistribution and use in source and binary forms, with or without
   24  * modification, are permitted provided that the following conditions
   25  * are met:
   26  * 1. Redistributions of source code must retain the copyright
   27  *    notice, this list of conditions and the following disclaimer.
   28  * 2. Redistributions in binary form must reproduce the above copyright
   29  *    notice, this list of conditions and the following disclaimer in the
   30  *    documentation and/or other materials provided with the distribution.
   31  * 3. All advertising materials mentioning features or use of this software
   32  *    must display the following acknowledgement:
   33  *    "This product includes cryptographic software written by
   34  *     Eric Young (eay@cryptsoft.com)"
   35  *    The word 'cryptographic' can be left out if the rouines from the library
   36  *    being used are not cryptographic related :-).
   37  * 4. If you include any Windows specific code (or a derivative thereof) from
   38  *    the apps directory (application code) you must include an acknowledgement:
   39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   40  *
   41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   51  * SUCH DAMAGE.
   52  *
   53  * The licence and distribution terms for any publically available version or
   54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
   55  * copied and put under another distribution licence
   56  * [including the GNU Public Licence.]
   57  */
   58 
   59 #include <stdio.h>
   60 #include "cryptlib.h"
   61 #include <openssl/asn1.h>
   62 
   63 #ifndef NO_OLD_ASN1
   64 
   65 void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, void *x)
   66 {
   67     unsigned char *b, *p;
   68     const unsigned char *p2;
   69     int i;
   70     char *ret;
   71 
   72     if (x == NULL)
   73         return (NULL);
   74 
   75     i = i2d(x, NULL);
   76     b = OPENSSL_malloc(i + 10);
   77     if (b == NULL) {
   78         ASN1err(ASN1_F_ASN1_DUP, ERR_R_MALLOC_FAILURE);
   79         return (NULL);
   80     }
   81     p = b;
   82     i = i2d(x, &p);
   83     p2 = b;
   84     ret = d2i(NULL, &p2, i);
   85     OPENSSL_free(b);
   86     return (ret);
   87 }
   88 
   89 #endif
   90 
   91 /*
   92  * ASN1_ITEM version of dup: this follows the model above except we don't
   93  * need to allocate the buffer. At some point this could be rewritten to
   94  * directly dup the underlying structure instead of doing and encode and
   95  * decode.
   96  */
   97 
   98 void *ASN1_item_dup(const ASN1_ITEM *it, void *x)
   99 {
  100     unsigned char *b = NULL;
  101     const unsigned char *p;
  102     long i;
  103     void *ret;
  104 
  105     if (x == NULL)
  106         return (NULL);
  107 
  108     i = ASN1_item_i2d(x, &b, it);
  109     if (b == NULL) {
  110         ASN1err(ASN1_F_ASN1_ITEM_DUP, ERR_R_MALLOC_FAILURE);
  111         return (NULL);
  112     }
  113     p = b;
  114     ret = ASN1_item_d2i(NULL, &p, i, it);
  115     OPENSSL_free(b);
  116     return (ret);
  117 }