crypto/md5/md5_sha1.c

   1 /*
   2  * Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * MD5 and SHA-1 low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <string.h>
  17 #include "prov/md5_sha1.h"
  18 #include <openssl/evp.h>
  19
  20 int md5_sha1_init(MD5_SHA1_CTX *mctx)
  21 {
  22     if (!MD5_Init(&mctx->md5))
  23         return 0;
  24     return SHA1_Init(&mctx->sha1);
  25 }
  26
  27 int md5_sha1_update(MD5_SHA1_CTX *mctx, const void *data, size_t count)
  28 {
  29     if (!MD5_Update(&mctx->md5, data, count))
  30         return 0;
  31     return SHA1_Update(&mctx->sha1, data, count);
  32 }
  33
  34 int md5_sha1_final(unsigned char *md, MD5_SHA1_CTX *mctx)
  35 {
  36     if (!MD5_Final(md, &mctx->md5))
  37         return 0;
  38     return SHA1_Final(md + MD5_DIGEST_LENGTH, &mctx->sha1);
  39 }
  40
  41 int md5_sha1_ctrl(MD5_SHA1_CTX *mctx, int cmd, int mslen, void *ms)
  42 {
  43     unsigned char padtmp[48];
  44     unsigned char md5tmp[MD5_DIGEST_LENGTH];
  45     unsigned char sha1tmp[SHA_DIGEST_LENGTH];
  46
  47     if (cmd != EVP_CTRL_SSL3_MASTER_SECRET)
  48         return -2;
  49
  50     if (mctx == NULL)
  51         return 0;
  52
  53     /* SSLv3 client auth handling: see RFC-6101 5.6.8 */
  54     if (mslen != 48)
  55         return 0;
  56
  57     /* At this point hash contains all handshake messages, update
  58      * with master secret and pad_1.
  59      */
  60
  61     if (md5_sha1_update(mctx, ms, mslen) <= 0)
  62         return 0;
  63
  64     /* Set padtmp to pad_1 value */
  65     memset(padtmp, 0x36, sizeof(padtmp));
  66
  67     if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
  68         return 0;
  69
  70     if (!MD5_Final(md5tmp, &mctx->md5))
  71         return 0;
  72
  73     if (!SHA1_Update(&mctx->sha1, padtmp, 40))
  74         return 0;
  75
  76     if (!SHA1_Final(sha1tmp, &mctx->sha1))
  77         return 0;
  78
  79     /* Reinitialise context */
  80
  81     if (!md5_sha1_init(mctx))
  82         return 0;
  83
  84     if (md5_sha1_update(mctx, ms, mslen) <= 0)
  85         return 0;
  86
  87     /* Set padtmp to pad_2 value */
  88     memset(padtmp, 0x5c, sizeof(padtmp));
  89
  90     if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
  91         return 0;
  92
  93     if (!MD5_Update(&mctx->md5, md5tmp, sizeof(md5tmp)))
  94         return 0;
  95
  96     if (!SHA1_Update(&mctx->sha1, padtmp, 40))
  97         return 0;
  98
  99     if (!SHA1_Update(&mctx->sha1, sha1tmp, sizeof(sha1tmp)))
 100         return 0;
 101
 102     /* Now when ctx is finalised it will return the SSL v3 hash value */
 103
 104     OPENSSL_cleanse(md5tmp, sizeof(md5tmp));
 105     OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp));
 106
 107     return 1;
 108 }