annotate md5.c @ 0:d7da3b1e1540 libtomcrypt

put back the 0.95 makefile which was inadvertently merged over
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:21:40 +0000
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children 6362d3854bb4
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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 /* MD5 hash function 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 MD5
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17
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18 const struct _hash_descriptor md5_desc =
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19 {
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20 "md5",
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21 3,
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22 16,
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23 64,
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24 &md5_init,
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25 &md5_process,
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26 &md5_done,
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27 &md5_test
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28 };
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29
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30 #define F(x,y,z) (z ^ (x & (y ^ z)))
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31 #define G(x,y,z) (y ^ (z & (y ^ x)))
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32 #define H(x,y,z) (x^y^z)
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33 #define I(x,y,z) (y^(x|(~z)))
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34
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35 #define FF(a,b,c,d,M,s,t) \
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36 a = (a + F(b,c,d) + M + t); a = ROL(a, s) + b;
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37
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38 #define GG(a,b,c,d,M,s,t) \
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39 a = (a + G(b,c,d) + M + t); a = ROL(a, s) + b;
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40
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41 #define HH(a,b,c,d,M,s,t) \
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42 a = (a + H(b,c,d) + M + t); a = ROL(a, s) + b;
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43
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44 #define II(a,b,c,d,M,s,t) \
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45 a = (a + I(b,c,d) + M + t); a = ROL(a, s) + b;
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46
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47 #ifdef CLEAN_STACK
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48 static void _md5_compress(hash_state *md, unsigned char *buf)
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49 #else
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50 static void md5_compress(hash_state *md, unsigned char *buf)
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51 #endif
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52 {
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53 ulong32 i, W[16], a, b, c, d;
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54
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55 /* copy the state into 512-bits into W[0..15] */
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56 for (i = 0; i < 16; i++) {
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57 LOAD32L(W[i], buf + (4*i));
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58 }
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59
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60 /* copy state */
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61 a = md->md5.state[0];
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62 b = md->md5.state[1];
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63 c = md->md5.state[2];
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64 d = md->md5.state[3];
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65
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66 FF(a,b,c,d,W[0],7,0xd76aa478UL)
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67 FF(d,a,b,c,W[1],12,0xe8c7b756UL)
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68 FF(c,d,a,b,W[2],17,0x242070dbUL)
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69 FF(b,c,d,a,W[3],22,0xc1bdceeeUL)
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70 FF(a,b,c,d,W[4],7,0xf57c0fafUL)
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71 FF(d,a,b,c,W[5],12,0x4787c62aUL)
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72 FF(c,d,a,b,W[6],17,0xa8304613UL)
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73 FF(b,c,d,a,W[7],22,0xfd469501UL)
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74 FF(a,b,c,d,W[8],7,0x698098d8UL)
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75 FF(d,a,b,c,W[9],12,0x8b44f7afUL)
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76 FF(c,d,a,b,W[10],17,0xffff5bb1UL)
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77 FF(b,c,d,a,W[11],22,0x895cd7beUL)
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78 FF(a,b,c,d,W[12],7,0x6b901122UL)
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79 FF(d,a,b,c,W[13],12,0xfd987193UL)
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80 FF(c,d,a,b,W[14],17,0xa679438eUL)
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81 FF(b,c,d,a,W[15],22,0x49b40821UL)
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82 GG(a,b,c,d,W[1],5,0xf61e2562UL)
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83 GG(d,a,b,c,W[6],9,0xc040b340UL)
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84 GG(c,d,a,b,W[11],14,0x265e5a51UL)
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85 GG(b,c,d,a,W[0],20,0xe9b6c7aaUL)
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86 GG(a,b,c,d,W[5],5,0xd62f105dUL)
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87 GG(d,a,b,c,W[10],9,0x02441453UL)
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88 GG(c,d,a,b,W[15],14,0xd8a1e681UL)
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89 GG(b,c,d,a,W[4],20,0xe7d3fbc8UL)
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90 GG(a,b,c,d,W[9],5,0x21e1cde6UL)
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91 GG(d,a,b,c,W[14],9,0xc33707d6UL)
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92 GG(c,d,a,b,W[3],14,0xf4d50d87UL)
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93 GG(b,c,d,a,W[8],20,0x455a14edUL)
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94 GG(a,b,c,d,W[13],5,0xa9e3e905UL)
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95 GG(d,a,b,c,W[2],9,0xfcefa3f8UL)
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96 GG(c,d,a,b,W[7],14,0x676f02d9UL)
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97 GG(b,c,d,a,W[12],20,0x8d2a4c8aUL)
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98 HH(a,b,c,d,W[5],4,0xfffa3942UL)
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99 HH(d,a,b,c,W[8],11,0x8771f681UL)
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100 HH(c,d,a,b,W[11],16,0x6d9d6122UL)
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101 HH(b,c,d,a,W[14],23,0xfde5380cUL)
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102 HH(a,b,c,d,W[1],4,0xa4beea44UL)
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103 HH(d,a,b,c,W[4],11,0x4bdecfa9UL)
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104 HH(c,d,a,b,W[7],16,0xf6bb4b60UL)
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105 HH(b,c,d,a,W[10],23,0xbebfbc70UL)
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106 HH(a,b,c,d,W[13],4,0x289b7ec6UL)
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107 HH(d,a,b,c,W[0],11,0xeaa127faUL)
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108 HH(c,d,a,b,W[3],16,0xd4ef3085UL)
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109 HH(b,c,d,a,W[6],23,0x04881d05UL)
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110 HH(a,b,c,d,W[9],4,0xd9d4d039UL)
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111 HH(d,a,b,c,W[12],11,0xe6db99e5UL)
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112 HH(c,d,a,b,W[15],16,0x1fa27cf8UL)
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113 HH(b,c,d,a,W[2],23,0xc4ac5665UL)
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114 II(a,b,c,d,W[0],6,0xf4292244UL)
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115 II(d,a,b,c,W[7],10,0x432aff97UL)
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116 II(c,d,a,b,W[14],15,0xab9423a7UL)
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117 II(b,c,d,a,W[5],21,0xfc93a039UL)
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118 II(a,b,c,d,W[12],6,0x655b59c3UL)
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119 II(d,a,b,c,W[3],10,0x8f0ccc92UL)
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120 II(c,d,a,b,W[10],15,0xffeff47dUL)
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121 II(b,c,d,a,W[1],21,0x85845dd1UL)
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122 II(a,b,c,d,W[8],6,0x6fa87e4fUL)
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123 II(d,a,b,c,W[15],10,0xfe2ce6e0UL)
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124 II(c,d,a,b,W[6],15,0xa3014314UL)
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diff changeset
125 II(b,c,d,a,W[13],21,0x4e0811a1UL)
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diff changeset
126 II(a,b,c,d,W[4],6,0xf7537e82UL)
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diff changeset
127 II(d,a,b,c,W[11],10,0xbd3af235UL)
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diff changeset
128 II(c,d,a,b,W[2],15,0x2ad7d2bbUL)
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diff changeset
129 II(b,c,d,a,W[9],21,0xeb86d391UL)
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130
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131 md->md5.state[0] = md->md5.state[0] + a;
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132 md->md5.state[1] = md->md5.state[1] + b;
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133 md->md5.state[2] = md->md5.state[2] + c;
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134 md->md5.state[3] = md->md5.state[3] + d;
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135 }
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136
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137 #ifdef CLEAN_STACK
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138 static void md5_compress(hash_state *md, unsigned char *buf)
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139 {
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140 _md5_compress(md, buf);
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141 burn_stack(sizeof(ulong32) * 21);
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142 }
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143 #endif
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144
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145 void md5_init(hash_state * md)
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146 {
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147 _ARGCHK(md != NULL);
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148 md->md5.state[0] = 0x67452301UL;
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149 md->md5.state[1] = 0xefcdab89UL;
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150 md->md5.state[2] = 0x98badcfeUL;
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151 md->md5.state[3] = 0x10325476UL;
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152 md->md5.curlen = 0;
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153 md->md5.length = 0;
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154 }
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155
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156 HASH_PROCESS(md5_process, md5_compress, md5, 64)
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157
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158 int md5_done(hash_state * md, unsigned char *hash)
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159 {
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160 int i;
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161
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162 _ARGCHK(md != NULL);
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163 _ARGCHK(hash != NULL);
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164
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165 if (md->md5.curlen >= sizeof(md->md5.buf)) {
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166 return CRYPT_INVALID_ARG;
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167 }
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168
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169
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170 /* increase the length of the message */
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171 md->md5.length += md->md5.curlen * 8;
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172
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173 /* append the '1' bit */
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174 md->md5.buf[md->md5.curlen++] = (unsigned char)0x80;
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175
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176 /* if the length is currently above 56 bytes we append zeros
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177 * then compress. Then we can fall back to padding zeros and length
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178 * encoding like normal.
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179 */
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180 if (md->md5.curlen > 56) {
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181 while (md->md5.curlen < 64) {
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182 md->md5.buf[md->md5.curlen++] = (unsigned char)0;
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183 }
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184 md5_compress(md, md->md5.buf);
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185 md->md5.curlen = 0;
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186 }
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187
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188 /* pad upto 56 bytes of zeroes */
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189 while (md->md5.curlen < 56) {
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190 md->md5.buf[md->md5.curlen++] = (unsigned char)0;
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191 }
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192
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193 /* store length */
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194 STORE64L(md->md5.length, md->md5.buf+56);
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195 md5_compress(md, md->md5.buf);
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196
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197 /* copy output */
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198 for (i = 0; i < 4; i++) {
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diff changeset
199 STORE32L(md->md5.state[i], hash+(4*i));
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200 }
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diff changeset
201 #ifdef CLEAN_STACK
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diff changeset
202 zeromem(md, sizeof(hash_state));
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diff changeset
203 #endif
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204 return CRYPT_OK;
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diff changeset
205 }
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206
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diff changeset
207 int md5_test(void)
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208 {
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209 #ifndef LTC_TEST
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210 return CRYPT_NOP;
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diff changeset
211 #else
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diff changeset
212 static const struct {
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213 char *msg;
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diff changeset
214 unsigned char hash[16];
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diff changeset
215 } tests[] = {
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216 { "",
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217 { 0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
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diff changeset
218 0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e } },
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diff changeset
219 { "a",
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diff changeset
220 {0x0c, 0xc1, 0x75, 0xb9, 0xc0, 0xf1, 0xb6, 0xa8,
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diff changeset
221 0x31, 0xc3, 0x99, 0xe2, 0x69, 0x77, 0x26, 0x61 } },
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diff changeset
222 { "abc",
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diff changeset
223 { 0x90, 0x01, 0x50, 0x98, 0x3c, 0xd2, 0x4f, 0xb0,
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diff changeset
224 0xd6, 0x96, 0x3f, 0x7d, 0x28, 0xe1, 0x7f, 0x72 } },
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diff changeset
225 { "message digest",
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diff changeset
226 { 0xf9, 0x6b, 0x69, 0x7d, 0x7c, 0xb7, 0x93, 0x8d,
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diff changeset
227 0x52, 0x5a, 0x2f, 0x31, 0xaa, 0xf1, 0x61, 0xd0 } },
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228 { "abcdefghijklmnopqrstuvwxyz",
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diff changeset
229 { 0xc3, 0xfc, 0xd3, 0xd7, 0x61, 0x92, 0xe4, 0x00,
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diff changeset
230 0x7d, 0xfb, 0x49, 0x6c, 0xca, 0x67, 0xe1, 0x3b } },
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diff changeset
231 { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
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diff changeset
232 { 0xd1, 0x74, 0xab, 0x98, 0xd2, 0x77, 0xd9, 0xf5,
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diff changeset
233 0xa5, 0x61, 0x1c, 0x2c, 0x9f, 0x41, 0x9d, 0x9f } },
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diff changeset
234 { "12345678901234567890123456789012345678901234567890123456789012345678901234567890",
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diff changeset
235 { 0x57, 0xed, 0xf4, 0xa2, 0x2b, 0xe3, 0xc9, 0x55,
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diff changeset
236 0xac, 0x49, 0xda, 0x2e, 0x21, 0x07, 0xb6, 0x7a } },
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diff changeset
237 { NULL, { 0 } }
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diff changeset
238 };
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diff changeset
239
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diff changeset
240 int i;
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diff changeset
241 unsigned char tmp[16];
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diff changeset
242 hash_state md;
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diff changeset
243
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diff changeset
244 for (i = 0; tests[i].msg != NULL; i++) {
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diff changeset
245 md5_init(&md);
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diff changeset
246 md5_process(&md, (unsigned char *)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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diff changeset
247 md5_done(&md, tmp);
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diff changeset
248 if (memcmp(tmp, tests[i].hash, 16) != 0) {
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249 return CRYPT_FAIL_TESTVECTOR;
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250 }
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251 }
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252 return CRYPT_OK;
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253 #endif
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254 }
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255
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256 #endif
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257
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258