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