annotate libtomcrypt/src/hashes/sha2/sha512_256.c @ 1698:f966834f0f9c

Use Linux getrandom() to ensure random device is initialised Remove old code warning about random device being not ready, /dev/random isn't used by default anyway.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 28 May 2020 22:50:41 +0800
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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: $Format:%ai$ */