Mercurial > dropbear
annotate libtomcrypt/src/hashes/sha2/sha512_256.c @ 1484:f68ee671bf6d
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author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 10 Feb 2018 18:57:20 +0800 |
parents | 6dba84798cd5 |
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rev | line source |
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1471
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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 /** |
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10 @param sha512_256.c |
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11 SHA512/256 hash included in sha512.c |
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12 */ |
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13 |
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14 #include "tomcrypt.h" |
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15 |
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16 #if defined(LTC_SHA512_256) && defined(LTC_SHA512) |
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17 |
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18 const struct ltc_hash_descriptor sha512_256_desc = |
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19 { |
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20 "sha512-256", |
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21 16, |
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22 32, |
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23 128, |
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24 |
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25 /* OID */ |
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26 { 2, 16, 840, 1, 101, 3, 4, 2, 6, }, |
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27 9, |
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28 |
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29 &sha512_256_init, |
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30 &sha512_process, |
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31 &sha512_256_done, |
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32 &sha512_256_test, |
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33 NULL |
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34 }; |
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35 |
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36 /** |
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37 Initialize the hash state |
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38 @param md The hash state you wish to initialize |
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39 @return CRYPT_OK if successful |
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40 */ |
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41 int sha512_256_init(hash_state * md) |
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42 { |
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43 LTC_ARGCHK(md != NULL); |
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44 |
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45 md->sha512.curlen = 0; |
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46 md->sha512.length = 0; |
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47 md->sha512.state[0] = CONST64(0x22312194FC2BF72C); |
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48 md->sha512.state[1] = CONST64(0x9F555FA3C84C64C2); |
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49 md->sha512.state[2] = CONST64(0x2393B86B6F53B151); |
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50 md->sha512.state[3] = CONST64(0x963877195940EABD); |
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51 md->sha512.state[4] = CONST64(0x96283EE2A88EFFE3); |
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52 md->sha512.state[5] = CONST64(0xBE5E1E2553863992); |
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53 md->sha512.state[6] = CONST64(0x2B0199FC2C85B8AA); |
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54 md->sha512.state[7] = CONST64(0x0EB72DDC81C52CA2); |
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55 return CRYPT_OK; |
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56 } |
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57 |
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58 /** |
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59 Terminate the hash to get the digest |
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60 @param md The hash state |
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61 @param out [out] The destination of the hash (48 bytes) |
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62 @return CRYPT_OK if successful |
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63 */ |
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64 int sha512_256_done(hash_state * md, unsigned char *out) |
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65 { |
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66 unsigned char buf[64]; |
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67 |
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68 LTC_ARGCHK(md != NULL); |
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69 LTC_ARGCHK(out != NULL); |
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70 |
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71 if (md->sha512.curlen >= sizeof(md->sha512.buf)) { |
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72 return CRYPT_INVALID_ARG; |
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73 } |
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74 |
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75 sha512_done(md, buf); |
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76 XMEMCPY(out, buf, 32); |
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77 #ifdef LTC_CLEAN_STACK |
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78 zeromem(buf, sizeof(buf)); |
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79 #endif |
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80 return CRYPT_OK; |
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81 } |
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82 |
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83 /** |
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84 Self-test the hash |
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85 @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled |
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86 */ |
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87 int sha512_256_test(void) |
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88 { |
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89 #ifndef LTC_TEST |
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90 return CRYPT_NOP; |
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91 #else |
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92 static const struct { |
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93 const char *msg; |
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94 unsigned char hash[32]; |
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95 } tests[] = { |
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96 { "abc", |
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97 { 0x53, 0x04, 0x8E, 0x26, 0x81, 0x94, 0x1E, 0xF9, |
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98 0x9B, 0x2E, 0x29, 0xB7, 0x6B, 0x4C, 0x7D, 0xAB, |
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99 0xE4, 0xC2, 0xD0, 0xC6, 0x34, 0xFC, 0x6D, 0x46, |
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100 0xE0, 0xE2, 0xF1, 0x31, 0x07, 0xE7, 0xAF, 0x23 } |
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101 }, |
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102 { "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", |
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103 { 0x39, 0x28, 0xE1, 0x84, 0xFB, 0x86, 0x90, 0xF8, |
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104 0x40, 0xDA, 0x39, 0x88, 0x12, 0x1D, 0x31, 0xBE, |
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105 0x65, 0xCB, 0x9D, 0x3E, 0xF8, 0x3E, 0xE6, 0x14, |
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106 0x6F, 0xEA, 0xC8, 0x61, 0xE1, 0x9B, 0x56, 0x3A } |
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107 }, |
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108 }; |
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109 |
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110 int i; |
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111 unsigned char tmp[32]; |
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112 hash_state md; |
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113 |
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114 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) { |
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115 sha512_256_init(&md); |
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116 sha512_256_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg)); |
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117 sha512_256_done(&md, tmp); |
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118 if (compare_testvector(tmp, sizeof(tmp), tests[i].hash, sizeof(tests[i].hash), "SHA512-265", i)) { |
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119 return CRYPT_FAIL_TESTVECTOR; |
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120 } |
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121 } |
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122 return CRYPT_OK; |
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123 #endif |
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124 } |
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125 |
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126 #endif /* defined(LTC_SHA384) && defined(LTC_SHA512) */ |
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127 |
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128 /* ref: $Format:%D$ */ |
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129 /* git commit: $Format:%H$ */ |
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130 /* commit time: $Format:%ai$ */ |