annotate sha512.c @ 144:7ed585a2c53b libtomcrypt

propagate of 3f8f752126017cbe7d93c4086c27a91550df745f and 747ebf284d40a15b338e5a5c7730ecec6eade3d7 from branch 'au.asn.ucc.matt.ltc-orig' to 'au.asn.ucc.matt.ltc-db'
author Matt Johnston <matt@ucc.asn.au>
date Sun, 19 Dec 2004 11:47:33 +0000
parents 5d99163f7e32 b939f2d4431e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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20
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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 /* SHA512 by Tom St Denis */
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13
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14 #include "mycrypt.h"
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15
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16 #ifdef SHA512
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17
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18 const struct _hash_descriptor sha512_desc =
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19 {
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20 "sha512",
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21 5,
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22 64,
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23 128,
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24
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25 /* DER identifier */
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26 { 0x30, 0x51, 0x30, 0x0D, 0x06, 0x09, 0x60, 0x86,
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27 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05,
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28 0x00, 0x04, 0x40 },
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29 19,
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30
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31 &sha512_init,
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32 &sha512_process,
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33 &sha512_done,
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34 &sha512_test
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35 };
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36
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37 /* the K array */
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38 static const ulong64 K[80] = {
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39 CONST64(0x428a2f98d728ae22), CONST64(0x7137449123ef65cd),
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40 CONST64(0xb5c0fbcfec4d3b2f), CONST64(0xe9b5dba58189dbbc),
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41 CONST64(0x3956c25bf348b538), CONST64(0x59f111f1b605d019),
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42 CONST64(0x923f82a4af194f9b), CONST64(0xab1c5ed5da6d8118),
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43 CONST64(0xd807aa98a3030242), CONST64(0x12835b0145706fbe),
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44 CONST64(0x243185be4ee4b28c), CONST64(0x550c7dc3d5ffb4e2),
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45 CONST64(0x72be5d74f27b896f), CONST64(0x80deb1fe3b1696b1),
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46 CONST64(0x9bdc06a725c71235), CONST64(0xc19bf174cf692694),
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47 CONST64(0xe49b69c19ef14ad2), CONST64(0xefbe4786384f25e3),
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48 CONST64(0x0fc19dc68b8cd5b5), CONST64(0x240ca1cc77ac9c65),
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49 CONST64(0x2de92c6f592b0275), CONST64(0x4a7484aa6ea6e483),
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50 CONST64(0x5cb0a9dcbd41fbd4), CONST64(0x76f988da831153b5),
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51 CONST64(0x983e5152ee66dfab), CONST64(0xa831c66d2db43210),
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52 CONST64(0xb00327c898fb213f), CONST64(0xbf597fc7beef0ee4),
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53 CONST64(0xc6e00bf33da88fc2), CONST64(0xd5a79147930aa725),
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54 CONST64(0x06ca6351e003826f), CONST64(0x142929670a0e6e70),
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55 CONST64(0x27b70a8546d22ffc), CONST64(0x2e1b21385c26c926),
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56 CONST64(0x4d2c6dfc5ac42aed), CONST64(0x53380d139d95b3df),
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57 CONST64(0x650a73548baf63de), CONST64(0x766a0abb3c77b2a8),
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58 CONST64(0x81c2c92e47edaee6), CONST64(0x92722c851482353b),
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59 CONST64(0xa2bfe8a14cf10364), CONST64(0xa81a664bbc423001),
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60 CONST64(0xc24b8b70d0f89791), CONST64(0xc76c51a30654be30),
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61 CONST64(0xd192e819d6ef5218), CONST64(0xd69906245565a910),
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62 CONST64(0xf40e35855771202a), CONST64(0x106aa07032bbd1b8),
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63 CONST64(0x19a4c116b8d2d0c8), CONST64(0x1e376c085141ab53),
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64 CONST64(0x2748774cdf8eeb99), CONST64(0x34b0bcb5e19b48a8),
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65 CONST64(0x391c0cb3c5c95a63), CONST64(0x4ed8aa4ae3418acb),
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66 CONST64(0x5b9cca4f7763e373), CONST64(0x682e6ff3d6b2b8a3),
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67 CONST64(0x748f82ee5defb2fc), CONST64(0x78a5636f43172f60),
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68 CONST64(0x84c87814a1f0ab72), CONST64(0x8cc702081a6439ec),
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69 CONST64(0x90befffa23631e28), CONST64(0xa4506cebde82bde9),
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70 CONST64(0xbef9a3f7b2c67915), CONST64(0xc67178f2e372532b),
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71 CONST64(0xca273eceea26619c), CONST64(0xd186b8c721c0c207),
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72 CONST64(0xeada7dd6cde0eb1e), CONST64(0xf57d4f7fee6ed178),
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73 CONST64(0x06f067aa72176fba), CONST64(0x0a637dc5a2c898a6),
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74 CONST64(0x113f9804bef90dae), CONST64(0x1b710b35131c471b),
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75 CONST64(0x28db77f523047d84), CONST64(0x32caab7b40c72493),
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76 CONST64(0x3c9ebe0a15c9bebc), CONST64(0x431d67c49c100d4c),
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77 CONST64(0x4cc5d4becb3e42b6), CONST64(0x597f299cfc657e2a),
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78 CONST64(0x5fcb6fab3ad6faec), CONST64(0x6c44198c4a475817)
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79 };
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80
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81 /* Various logical functions */
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82 #define Ch(x,y,z) (z ^ (x & (y ^ z)))
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83 #define Maj(x,y,z) (((x | y) & z) | (x & y))
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84 #define S(x, n) ROR64((x),(n))
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85 #define R(x, n) (((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((ulong64)n))
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86 #define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39))
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87 #define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41))
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88 #define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7))
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89 #define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6))
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90
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91 /* compress 1024-bits */
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92 #ifdef CLEAN_STACK
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93 static int _sha512_compress(hash_state * md, unsigned char *buf)
20
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94 #else
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95 static int sha512_compress(hash_state * md, unsigned char *buf)
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96 #endif
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97 {
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98 ulong64 S[8], W[80], t0, t1;
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99 int i;
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100
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101 /* copy state into S */
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102 for (i = 0; i < 8; i++) {
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103 S[i] = md->sha512.state[i];
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104 }
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105
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106 /* copy the state into 1024-bits into W[0..15] */
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107 for (i = 0; i < 16; i++) {
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108 LOAD64H(W[i], buf + (8*i));
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109 }
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110
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111 /* fill W[16..79] */
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112 for (i = 16; i < 80; i++) {
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113 W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
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114 }
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115
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116 /* Compress */
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117 #ifdef SMALL_CODE
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118 for (i = 0; i < 80; i++) {
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119 t0 = S[7] + Sigma1(S[4]) + Ch(S[4], S[5], S[6]) + K[i] + W[i];
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120 t1 = Sigma0(S[0]) + Maj(S[0], S[1], S[2]);
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121 S[7] = S[6];
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122 S[6] = S[5];
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123 S[5] = S[4];
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124 S[4] = S[3] + t0;
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125 S[3] = S[2];
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126 S[2] = S[1];
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127 S[1] = S[0];
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128 S[0] = t0 + t1;
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129 }
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130 #else
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131 #define RND(a,b,c,d,e,f,g,h,i) \
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132 t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
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133 t1 = Sigma0(a) + Maj(a, b, c); \
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134 d += t0; \
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135 h = t0 + t1;
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136
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137 for (i = 0; i < 80; i += 8) {
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138 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0);
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139 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1);
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140 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2);
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141 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3);
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142 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4);
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143 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5);
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144 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6);
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145 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7);
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146 }
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147 #endif
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148
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149
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150 /* feedback */
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151 for (i = 0; i < 8; i++) {
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152 md->sha512.state[i] = md->sha512.state[i] + S[i];
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153 }
143
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154
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155 return CRYPT_OK;
20
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156 }
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157
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158 /* compress 1024-bits */
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159 #ifdef CLEAN_STACK
143
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160 static int sha512_compress(hash_state * md, unsigned char *buf)
20
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161 {
143
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162 int err;
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163 err = _sha512_compress(md, buf);
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164 burn_stack(sizeof(ulong64) * 90 + sizeof(int));
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165 return err;
20
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166 }
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167 #endif
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168
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169 /* init the sha512 state */
143
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170 int sha512_init(hash_state * md)
20
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171 {
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172 _ARGCHK(md != NULL);
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173 md->sha512.curlen = 0;
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174 md->sha512.length = 0;
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175 md->sha512.state[0] = CONST64(0x6a09e667f3bcc908);
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176 md->sha512.state[1] = CONST64(0xbb67ae8584caa73b);
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177 md->sha512.state[2] = CONST64(0x3c6ef372fe94f82b);
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178 md->sha512.state[3] = CONST64(0xa54ff53a5f1d36f1);
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179 md->sha512.state[4] = CONST64(0x510e527fade682d1);
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180 md->sha512.state[5] = CONST64(0x9b05688c2b3e6c1f);
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181 md->sha512.state[6] = CONST64(0x1f83d9abfb41bd6b);
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182 md->sha512.state[7] = CONST64(0x5be0cd19137e2179);
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183 return CRYPT_OK;
20
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184 }
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185
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186 HASH_PROCESS(sha512_process, sha512_compress, sha512, 128)
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187
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188 int sha512_done(hash_state * md, unsigned char *hash)
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189 {
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190 int i;
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191
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192 _ARGCHK(md != NULL);
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193 _ARGCHK(hash != NULL);
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194
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195 if (md->sha512.curlen >= sizeof(md->sha512.buf)) {
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196 return CRYPT_INVALID_ARG;
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197 }
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198
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199 /* increase the length of the message */
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200 md->sha512.length += md->sha512.curlen * CONST64(8);
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201
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202 /* append the '1' bit */
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203 md->sha512.buf[md->sha512.curlen++] = (unsigned char)0x80;
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204
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205 /* if the length is currently above 112 bytes we append zeros
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206 * then compress. Then we can fall back to padding zeros and length
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207 * encoding like normal.
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208 */
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209 if (md->sha512.curlen > 112) {
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210 while (md->sha512.curlen < 128) {
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211 md->sha512.buf[md->sha512.curlen++] = (unsigned char)0;
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212 }
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213 sha512_compress(md, md->sha512.buf);
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214 md->sha512.curlen = 0;
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215 }
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216
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217 /* pad upto 120 bytes of zeroes
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218 * note: that from 112 to 120 is the 64 MSB of the length. We assume that you won't hash
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219 * > 2^64 bits of data... :-)
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220 */
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221 while (md->sha512.curlen < 120) {
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222 md->sha512.buf[md->sha512.curlen++] = (unsigned char)0;
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223 }
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224
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225 /* store length */
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226 STORE64H(md->sha512.length, md->sha512.buf+120);
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227 sha512_compress(md, md->sha512.buf);
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228
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229 /* copy output */
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230 for (i = 0; i < 8; i++) {
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231 STORE64H(md->sha512.state[i], hash+(8*i));
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232 }
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233 #ifdef CLEAN_STACK
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234 zeromem(md, sizeof(hash_state));
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235 #endif
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236 return CRYPT_OK;
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237 }
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238
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239 int sha512_test(void)
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240 {
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241 #ifndef LTC_TEST
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242 return CRYPT_NOP;
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243 #else
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244 static const struct {
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245 char *msg;
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246 unsigned char hash[64];
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247 } tests[] = {
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248 { "abc",
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249 { 0xdd, 0xaf, 0x35, 0xa1, 0x93, 0x61, 0x7a, 0xba,
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250 0xcc, 0x41, 0x73, 0x49, 0xae, 0x20, 0x41, 0x31,
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251 0x12, 0xe6, 0xfa, 0x4e, 0x89, 0xa9, 0x7e, 0xa2,
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252 0x0a, 0x9e, 0xee, 0xe6, 0x4b, 0x55, 0xd3, 0x9a,
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253 0x21, 0x92, 0x99, 0x2a, 0x27, 0x4f, 0xc1, 0xa8,
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254 0x36, 0xba, 0x3c, 0x23, 0xa3, 0xfe, 0xeb, 0xbd,
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255 0x45, 0x4d, 0x44, 0x23, 0x64, 0x3c, 0xe8, 0x0e,
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256 0x2a, 0x9a, 0xc9, 0x4f, 0xa5, 0x4c, 0xa4, 0x9f }
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257 },
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258 { "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
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259 { 0x8e, 0x95, 0x9b, 0x75, 0xda, 0xe3, 0x13, 0xda,
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260 0x8c, 0xf4, 0xf7, 0x28, 0x14, 0xfc, 0x14, 0x3f,
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261 0x8f, 0x77, 0x79, 0xc6, 0xeb, 0x9f, 0x7f, 0xa1,
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262 0x72, 0x99, 0xae, 0xad, 0xb6, 0x88, 0x90, 0x18,
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263 0x50, 0x1d, 0x28, 0x9e, 0x49, 0x00, 0xf7, 0xe4,
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264 0x33, 0x1b, 0x99, 0xde, 0xc4, 0xb5, 0x43, 0x3a,
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265 0xc7, 0xd3, 0x29, 0xee, 0xb6, 0xdd, 0x26, 0x54,
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266 0x5e, 0x96, 0xe5, 0x5b, 0x87, 0x4b, 0xe9, 0x09 }
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267 },
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268 };
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269
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270 int i;
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271 unsigned char tmp[64];
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272 hash_state md;
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273
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274 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
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275 sha512_init(&md);
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276 sha512_process(&md, (unsigned char *)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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277 sha512_done(&md, tmp);
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278 if (memcmp(tmp, tests[i].hash, 64) != 0) {
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279 return CRYPT_FAIL_TESTVECTOR;
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280 }
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281 }
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282 return CRYPT_OK;
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283 #endif
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284 }
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285
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286 #ifdef SHA384
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287 #include "sha384.c"
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288 #endif
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289
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290 #endif
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291
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292
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293