crypto/evp/m_md5_sha1.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2015 The OpenSSL Project.  All rights reserved.
   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  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  */
  53
  54 #if !defined(OPENSSL_NO_MD5) && !defined(OPENSSL_NO_SHA1)
  55
  56 # include <openssl/evp.h>
  57 # include <openssl/objects.h>
  58 # include <openssl/x509.h>
  59 # include <openssl/md5.h>
  60 # include <openssl/sha.h>
  61 # include "internal/cryptlib.h"
  62 # include "internal/evp_int.h"
  63 # include <openssl/rsa.h>
  64
  65 struct md5_sha1_ctx {
  66     MD5_CTX md5;
  67     SHA_CTX sha1;
  68 };
  69
  70 static int init(EVP_MD_CTX *ctx)
  71 {
  72     struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
  73     if (!MD5_Init(&mctx->md5))
  74         return 0;
  75     return SHA1_Init(&mctx->sha1);
  76 }
  77
  78 static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
  79 {
  80     struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
  81     if (!MD5_Update(&mctx->md5, data, count))
  82         return 0;
  83     return SHA1_Update(&mctx->sha1, data, count);
  84 }
  85
  86 static int final(EVP_MD_CTX *ctx, unsigned char *md)
  87 {
  88     struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
  89     if (!MD5_Final(md, &mctx->md5))
  90         return 0;
  91     return SHA1_Final(md + MD5_DIGEST_LENGTH, &mctx->sha1);
  92 }
  93
  94 static int ctrl(EVP_MD_CTX *ctx, int cmd, int mslen, void *ms)
  95 {
  96     unsigned char padtmp[48];
  97     unsigned char md5tmp[MD5_DIGEST_LENGTH];
  98     unsigned char sha1tmp[SHA_DIGEST_LENGTH];
  99     struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
 100
 101     if (cmd != EVP_CTRL_SSL3_MASTER_SECRET)
 102         return 0;
 103
 104     /* SSLv3 client auth handling: see RFC-6101 5.6.8 */
 105     if (mslen != 48)
 106         return 0;
 107
 108     /* At this point hash contains all handshake messages, update
 109      * with master secret and pad_1.
 110      */
 111
 112     if (update(ctx, ms, mslen) <= 0)
 113         return 0;
 114
 115     /* Set padtmp to pad_1 value */
 116     memset(padtmp, 0x36, sizeof(padtmp));
 117
 118     if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
 119         return 0;
 120
 121     if (!MD5_Final(md5tmp, &mctx->md5))
 122         return 0;
 123
 124     if (!SHA1_Update(&mctx->sha1, padtmp, 40))
 125         return 0;
 126
 127     if (!SHA1_Final(sha1tmp, &mctx->sha1))
 128         return 0;
 129
 130     /* Reinitialise context */
 131
 132     if (!init(ctx))
 133         return 0;
 134
 135     if (update(ctx, ms, mslen) <= 0)
 136         return 0;
 137
 138     /* Set padtmp to pad_2 value */
 139     memset(padtmp, 0x5c, sizeof(padtmp));
 140
 141     if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
 142         return 0;
 143
 144     if (!MD5_Update(&mctx->md5, md5tmp, sizeof(md5tmp)))
 145         return 0;
 146
 147     if (!SHA1_Update(&mctx->sha1, padtmp, 40))
 148         return 0;
 149
 150     if (!SHA1_Update(&mctx->sha1, sha1tmp, sizeof(sha1tmp)))
 151         return 0;
 152
 153     /* Now when ctx is finalised it will return the SSL v3 hash value */
 154
 155     OPENSSL_cleanse(md5tmp, sizeof(md5tmp));
 156     OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp));
 157
 158     return 1;
 159
 160 }
 161
 162 static const EVP_MD md5_sha1_md = {
 163     NID_md5_sha1,
 164     NID_md5_sha1,
 165     MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
 166     0,
 167     init,
 168     update,
 169     final,
 170     NULL,
 171     NULL,
 172     MD5_CBLOCK,
 173     sizeof(EVP_MD *) + sizeof(struct md5_sha1_ctx),
 174     ctrl
 175 };
 176
 177 const EVP_MD *EVP_md5_sha1(void)
 178 {
 179     return &md5_sha1_md;
 180 }
 181 #endif