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#include <string.h>
10#include "prov/md5_sha1.h"
11#include <openssl/evp.h>
12
13int md5_sha1_init(MD5_SHA1_CTX *mctx)
14{
15 if (!MD5_Init(&mctx->md5))
16 return 0;
17 return SHA1_Init(&mctx->sha1);
18}
19
20int md5_sha1_update(MD5_SHA1_CTX *mctx, const void *data, size_t count)
21{
22 if (!MD5_Update(&mctx->md5, data, count))
23 return 0;
24 return SHA1_Update(&mctx->sha1, data, count);
25}
26
27int md5_sha1_final(unsigned char *md, MD5_SHA1_CTX *mctx)
28{
29 if (!MD5_Final(md, &mctx->md5))
30 return 0;
31 return SHA1_Final(md + MD5_DIGEST_LENGTH, &mctx->sha1);
32}
33
34int md5_sha1_ctrl(MD5_SHA1_CTX *mctx, int cmd, int mslen, void *ms)
35{
36 unsigned char padtmp[48];
37 unsigned char md5tmp[MD5_DIGEST_LENGTH];
38 unsigned char sha1tmp[SHA_DIGEST_LENGTH];
39
40 if (cmd != EVP_CTRL_SSL3_MASTER_SECRET)
41 return -2;
42
43 if (mctx == NULL)
44 return 0;
45
46 /* SSLv3 client auth handling: see RFC-6101 5.6.8 */
47 if (mslen != 48)
48 return 0;
49
50 /* At this point hash contains all handshake messages, update
51 * with master secret and pad_1.
52 */
53
54 if (md5_sha1_update(mctx, ms, mslen) <= 0)
55 return 0;
56
57 /* Set padtmp to pad_1 value */
58 memset(padtmp, 0x36, sizeof(padtmp));
59
60 if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
61 return 0;
62
63 if (!MD5_Final(md5tmp, &mctx->md5))
64 return 0;
65
66 if (!SHA1_Update(&mctx->sha1, padtmp, 40))
67 return 0;
68
69 if (!SHA1_Final(sha1tmp, &mctx->sha1))
70 return 0;
71
72 /* Reinitialise context */
73
74 if (!md5_sha1_init(mctx))
75 return 0;
76
77 if (md5_sha1_update(mctx, ms, mslen) <= 0)
78 return 0;
79
80 /* Set padtmp to pad_2 value */
81 memset(padtmp, 0x5c, sizeof(padtmp));
82
83 if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
84 return 0;
85
86 if (!MD5_Update(&mctx->md5, md5tmp, sizeof(md5tmp)))
87 return 0;
88
89 if (!SHA1_Update(&mctx->sha1, padtmp, 40))
90 return 0;
91
92 if (!SHA1_Update(&mctx->sha1, sha1tmp, sizeof(sha1tmp)))
93 return 0;
94
95 /* Now when ctx is finalised it will return the SSL v3 hash value */
96
97 OPENSSL_cleanse(md5tmp, sizeof(md5tmp));
98 OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp));
99
100 return 1;
101}
102