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comparison deps/Platinum/ThirdParty/Neptune/ThirdParty/axTLS/crypto/hmac.c @ 0:3425707ddbf6

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Initial import (hopefully this mercurial stuff works...)
author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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-1:000000000000 0:3425707ddbf6
1 /*
2 * Copyright (c) 2007, Cameron Rich
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * * Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * * Neither the name of the axTLS project nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /**
32 * HMAC implementation - This code was originally taken from RFC2104
33 */
34
35 #include <string.h>
36 #include "crypto.h"
37
38 /**
39 * Perform HMAC-MD5
40 */
41 void hmac_md5(const uint8_t *msg, int length, const uint8_t *key,
42 int key_len, uint8_t *digest)
43 {
44 MD5_CTX context;
45 uint8_t k_ipad[64];
46 uint8_t k_opad[64];
47 int i;
48
49 memset(k_ipad, 0, sizeof k_ipad);
50 memset(k_opad, 0, sizeof k_opad);
51 memcpy(k_ipad, key, key_len);
52 memcpy(k_opad, key, key_len);
53
54 for (i = 0; i < 64; i++)
55 {
56 k_ipad[i] ^= 0x36;
57 k_opad[i] ^= 0x5c;
58 }
59
60 MD5_Init(&context);
61 MD5_Update(&context, k_ipad, 64);
62 MD5_Update(&context, msg, length);
63 MD5_Final(digest, &context);
64 MD5_Init(&context);
65 MD5_Update(&context, k_opad, 64);
66 MD5_Update(&context, digest, MD5_SIZE);
67 MD5_Final(digest, &context);
68 }
69
70 /**
71 * Perform HMAC-SHA1
72 */
73 void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key,
74 int key_len, uint8_t *digest)
75 {
76 SHA1_CTX context;
77 uint8_t k_ipad[64];
78 uint8_t k_opad[64];
79 int i;
80
81 memset(k_ipad, 0, sizeof k_ipad);
82 memset(k_opad, 0, sizeof k_opad);
83 memcpy(k_ipad, key, key_len);
84 memcpy(k_opad, key, key_len);
85
86 for (i = 0; i < 64; i++)
87 {
88 k_ipad[i] ^= 0x36;
89 k_opad[i] ^= 0x5c;
90 }
91
92 SHA1_Init(&context);
93 SHA1_Update(&context, k_ipad, 64);
94 SHA1_Update(&context, msg, length);
95 SHA1_Final(digest, &context);
96 SHA1_Init(&context);
97 SHA1_Update(&context, k_opad, 64);
98 SHA1_Update(&context, digest, SHA1_SIZE);
99 SHA1_Final(digest, &context);
100 }