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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 /* SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits */ |
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13 const struct _hash_descriptor sha224_desc = |
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14 { |
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15 "sha224", |
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16 10, |
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17 28, |
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18 64, |
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15
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19 |
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20 /* DER identifier (not supported) */ |
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21 { 0x00 }, |
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22 0, |
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23 |
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3
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24 &sha224_init, |
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25 &sha256_process, |
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26 &sha224_done, |
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27 &sha224_test |
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28 }; |
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29 |
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30 /* init the sha256 er... sha224 state ;-) */ |
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31 void sha224_init(hash_state * md) |
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32 { |
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33 _ARGCHK(md != NULL); |
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34 |
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35 md->sha256.curlen = 0; |
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36 md->sha256.length = 0; |
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37 md->sha256.state[0] = 0xc1059ed8UL; |
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38 md->sha256.state[1] = 0x367cd507UL; |
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39 md->sha256.state[2] = 0x3070dd17UL; |
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40 md->sha256.state[3] = 0xf70e5939UL; |
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41 md->sha256.state[4] = 0xffc00b31UL; |
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42 md->sha256.state[5] = 0x68581511UL; |
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43 md->sha256.state[6] = 0x64f98fa7UL; |
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44 md->sha256.state[7] = 0xbefa4fa4UL; |
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45 } |
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46 |
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47 int sha224_done(hash_state * md, unsigned char *hash) |
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48 { |
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49 unsigned char buf[32]; |
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50 int err; |
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51 |
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52 err = sha256_done(md, buf); |
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53 memcpy(hash, buf, 28); |
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54 #ifdef CLEAN_STACK |
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55 zeromem(buf, sizeof(buf)); |
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56 #endif |
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57 return err; |
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58 } |
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59 |
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60 int sha224_test(void) |
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61 { |
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62 #ifndef LTC_TEST |
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63 return CRYPT_NOP; |
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64 #else |
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65 static const struct { |
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66 char *msg; |
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67 unsigned char hash[28]; |
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68 } tests[] = { |
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69 { "abc", |
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70 { 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8, |
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71 0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2, |
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72 0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd, |
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73 0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 } |
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74 }, |
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75 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", |
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76 { 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76, |
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77 0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89, |
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78 0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4, |
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79 0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 } |
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80 }, |
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81 }; |
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82 |
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83 int i; |
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84 unsigned char tmp[28]; |
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85 hash_state md; |
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86 |
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87 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) { |
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88 sha224_init(&md); |
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89 sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg)); |
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90 sha224_done(&md, tmp); |
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91 if (memcmp(tmp, tests[i].hash, 28) != 0) { |
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92 return CRYPT_FAIL_TESTVECTOR; |
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93 } |
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94 } |
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95 return CRYPT_OK; |
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96 #endif |
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97 } |
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98 |
