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Member "libzip-1.5.2/lib/zip_crypto_openssl.c" (12 Mar 2019, 3610 Bytes) of package /linux/misc/libzip-1.5.2.tar.xz:


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    1 /*
    2   zip_crypto_openssl.c -- OpenSSL wrapper.
    3   Copyright (C) 2018 Dieter Baron and Thomas Klausner
    4 
    5   This file is part of libzip, a library to manipulate ZIP archives.
    6   The authors can be contacted at <libzip@nih.at>
    7 
    8   Redistribution and use in source and binary forms, with or without
    9   modification, are permitted provided that the following conditions
   10   are met:
   11   1. Redistributions of source code must retain the above copyright
   12   notice, this list of conditions and the following disclaimer.
   13   2. Redistributions in binary form must reproduce the above copyright
   14   notice, this list of conditions and the following disclaimer in
   15   the documentation and/or other materials provided with the
   16   distribution.
   17   3. The names of the authors may not be used to endorse or promote
   18   products derived from this software without specific prior
   19   written permission.
   20 
   21   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
   22   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   23   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
   25   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   27   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   29   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   31   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32 */
   33 
   34 #include <stdlib.h>
   35 
   36 #include "zipint.h"
   37 
   38 #include "zip_crypto.h"
   39 
   40 #include <openssl/rand.h>
   41 
   42 #if OPENSSL_VERSION_NUMBER < 0x1010000fL || defined(LIBRESSL_VERSION_NUMBER)
   43 #define USE_OPENSSL_1_0_API
   44 #endif
   45 
   46 
   47 _zip_crypto_aes_t *
   48 _zip_crypto_aes_new(const zip_uint8_t *key, zip_uint16_t key_size, zip_error_t *error) {
   49     _zip_crypto_aes_t *aes;
   50 
   51     if ((aes = (_zip_crypto_aes_t *)malloc(sizeof(*aes))) == NULL) {
   52     zip_error_set(error, ZIP_ER_MEMORY, 0);
   53     return NULL;
   54     }
   55 
   56     AES_set_encrypt_key(key, key_size, aes);
   57 
   58     return aes;
   59 }
   60 
   61 void
   62 _zip_crypto_aes_free(_zip_crypto_aes_t *aes) {
   63     if (aes == NULL) {
   64     return;
   65     }
   66 
   67     _zip_crypto_clear(aes, sizeof(*aes));
   68     free(aes);
   69 }
   70 
   71 
   72 _zip_crypto_hmac_t *
   73 _zip_crypto_hmac_new(const zip_uint8_t *secret, zip_uint64_t secret_length, zip_error_t *error) {
   74     _zip_crypto_hmac_t *hmac;
   75 
   76     if (secret_length > INT_MAX) {
   77     zip_error_set(error, ZIP_ER_INVAL, 0);
   78     return NULL;
   79     }
   80 
   81 #ifdef USE_OPENSSL_1_0_API
   82     if ((hmac = (_zip_crypto_hmac_t *)malloc(sizeof(*hmac))) == NULL) {
   83     zip_error_set(error, ZIP_ER_MEMORY, 0);
   84     return NULL;
   85     }
   86 
   87     HMAC_CTX_init(hmac);
   88 #else
   89     if ((hmac = HMAC_CTX_new()) == NULL) {
   90     zip_error_set(error, ZIP_ER_MEMORY, 0);
   91     return NULL;
   92     }
   93 #endif
   94 
   95     if (HMAC_Init_ex(hmac, secret, (int)secret_length, EVP_sha1(), NULL) != 1) {
   96     zip_error_set(error, ZIP_ER_INTERNAL, 0);
   97 #ifdef USE_OPENSSL_1_0_API
   98     free(hmac);
   99 #else
  100     HMAC_CTX_free(hmac);
  101 #endif
  102     return NULL;
  103     }
  104 
  105     return hmac;
  106 }
  107 
  108 
  109 void
  110 _zip_crypto_hmac_free(_zip_crypto_hmac_t *hmac) {
  111     if (hmac == NULL) {
  112     return;
  113     }
  114 
  115 #ifdef USE_OPENSSL_1_0_API
  116     HMAC_CTX_cleanup(hmac);
  117     _zip_crypto_clear(hmac, sizeof(*hmac));
  118     free(hmac);
  119 #else
  120     HMAC_CTX_free(hmac);
  121 #endif
  122 }
  123 
  124 
  125 bool
  126 _zip_crypto_hmac_output(_zip_crypto_hmac_t *hmac, zip_uint8_t *data) {
  127     unsigned int length;
  128 
  129     return HMAC_Final(hmac, data, &length) == 1;
  130 }
  131 
  132 
  133 ZIP_EXTERN bool
  134 zip_random(zip_uint8_t *buffer, zip_uint16_t length) {
  135     return RAND_bytes(buffer, length) == 1;
  136 }