Mercurial > dropbear

annotate src/hashes/sha2/sha224.c @ 192:9cc34777b479 libtomcrypt

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propagate from branch 'au.asn.ucc.matt.ltc-orig' (head 9ba8f01f44320e9cb9f19881105ae84f84a43ea9) to branch 'au.asn.ucc.matt.dropbear.ltc' (head dbf51c569bc34956ad948e4cc87a0eeb2170b768)
author Matt Johnston <matt@ucc.asn.au>
date Sun, 08 May 2005 06:36:47 +0000
parents 1c15b283127b
children 39d5d58461d6
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191
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
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9 * Tom St Denis, [email protected], http://libtomcrypt.org
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10 */
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11 /**
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12 @param sha224.c
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13 SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits (Tom St Denis)
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14 */
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15
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16 const struct ltc_hash_descriptor sha224_desc =
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17 {
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18 "sha224",
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19 10,
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20 28,
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21 64,
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22
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23 /* DER identifier (not supported) */
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24 { 0x00 },
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25 0,
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26
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27 &sha224_init,
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28 &sha256_process,
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29 &sha224_done,
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30 &sha224_test
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31 };
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32
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33 /* init the sha256 er... sha224 state ;-) */
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34 /**
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35 Initialize the hash state
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36 @param md The hash state you wish to initialize
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37 @return CRYPT_OK if successful
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38 */
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39 int sha224_init(hash_state * md)
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40 {
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41 LTC_ARGCHK(md != NULL);
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42
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43 md->sha256.curlen = 0;
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44 md->sha256.length = 0;
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45 md->sha256.state[0] = 0xc1059ed8UL;
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46 md->sha256.state[1] = 0x367cd507UL;
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47 md->sha256.state[2] = 0x3070dd17UL;
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48 md->sha256.state[3] = 0xf70e5939UL;
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49 md->sha256.state[4] = 0xffc00b31UL;
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50 md->sha256.state[5] = 0x68581511UL;
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51 md->sha256.state[6] = 0x64f98fa7UL;
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52 md->sha256.state[7] = 0xbefa4fa4UL;
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53 return CRYPT_OK;
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54 }
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55
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56 /**
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57 Terminate the hash to get the digest
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58 @param md The hash state
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59 @param out [out] The destination of the hash (28 bytes)
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60 @return CRYPT_OK if successful
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61 */
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62 int sha224_done(hash_state * md, unsigned char *out)
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63 {
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64 unsigned char buf[32];
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65 int err;
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66
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67 LTC_ARGCHK(md != NULL);
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68 LTC_ARGCHK(out != NULL);
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69
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70 err = sha256_done(md, buf);
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71 XMEMCPY(out, buf, 28);
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72 #ifdef LTC_CLEAN_STACK
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73 zeromem(buf, sizeof(buf));
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74 #endif
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75 return err;
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76 }
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77
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78 /**
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79 Self-test the hash
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80 @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
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81 */
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82 int sha224_test(void)
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83 {
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84 #ifndef LTC_TEST
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85 return CRYPT_NOP;
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86 #else
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87 static const struct {
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88 char *msg;
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89 unsigned char hash[28];
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90 } tests[] = {
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91 { "abc",
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92 { 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8,
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93 0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2,
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94 0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd,
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95 0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 }
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96 },
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97 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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98 { 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76,
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99 0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89,
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100 0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4,
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101 0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 }
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102 },
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103 };
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104
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105 int i;
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106 unsigned char tmp[28];
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107 hash_state md;
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108
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109 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
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110 sha224_init(&md);
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111 sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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112 sha224_done(&md, tmp);
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113 if (memcmp(tmp, tests[i].hash, 28) != 0) {
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114 return CRYPT_FAIL_TESTVECTOR;
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115 }
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116 }
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117 return CRYPT_OK;
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118 #endif
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119 }
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120