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annotate src/hashes/md2.c @ 209:39d5d58461d6 libtomcrypt-orig LTC_1.05

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Import of libtomcrypt 1.05
author Matt Johnston <matt@ucc.asn.au>
date Wed, 06 Jul 2005 03:53:40 +0000
parents 1c15b283127b
children
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191
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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 #include "tomcrypt.h"
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12
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13 /**
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14 @param md2.c
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15 MD2 (RFC 1319) hash function implementation by Tom St Denis
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16 */
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17
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18 #ifdef MD2
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19
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20 const struct ltc_hash_descriptor md2_desc =
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21 {
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22 "md2",
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23 7,
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24 16,
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25 16,
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26
209
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27 /* OID */
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28 { 1, 2, 840, 113549, 2, 2, },
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29 6,
191
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30
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31 &md2_init,
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32 &md2_process,
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33 &md2_done,
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34 &md2_test
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35 };
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36
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37 static const unsigned char PI_SUBST[256] = {
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38 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
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39 19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
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40 76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
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41 138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
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42 245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
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43 148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
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44 39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
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45 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
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46 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
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47 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
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48 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
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49 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
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50 234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
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51 129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
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52 8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
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53 203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
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54 166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
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55 31, 26, 219, 153, 141, 51, 159, 17, 131, 20
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56 };
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57
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58 /* adds 16 bytes to the checksum */
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59 static void md2_update_chksum(hash_state *md)
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60 {
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61 int j;
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62 unsigned char L;
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63 L = md->md2.chksum[15];
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64 for (j = 0; j < 16; j++) {
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65
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66 /* caution, the RFC says its "C[j] = S[M[i*16+j] xor L]" but the reference source code [and test vectors] say
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67 otherwise.
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68 */
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69 L = (md->md2.chksum[j] ^= PI_SUBST[(int)(md->md2.buf[j] ^ L)] & 255);
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70 }
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71 }
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72
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73 static void md2_compress(hash_state *md)
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74 {
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75 int j, k;
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76 unsigned char t;
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77
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78 /* copy block */
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79 for (j = 0; j < 16; j++) {
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80 md->md2.X[16+j] = md->md2.buf[j];
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81 md->md2.X[32+j] = md->md2.X[j] ^ md->md2.X[16+j];
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82 }
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83
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84 t = (unsigned char)0;
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85
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86 /* do 18 rounds */
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87 for (j = 0; j < 18; j++) {
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88 for (k = 0; k < 48; k++) {
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89 t = (md->md2.X[k] ^= PI_SUBST[(int)(t & 255)]);
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90 }
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91 t = (t + (unsigned char)j) & 255;
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92 }
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93 }
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94
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95 /**
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96 Initialize the hash state
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97 @param md The hash state you wish to initialize
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98 @return CRYPT_OK if successful
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99 */
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100 int md2_init(hash_state *md)
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101 {
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102 LTC_ARGCHK(md != NULL);
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103
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104 /* MD2 uses a zero'ed state... */
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105 zeromem(md->md2.X, sizeof(md->md2.X));
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106 zeromem(md->md2.chksum, sizeof(md->md2.chksum));
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107 zeromem(md->md2.buf, sizeof(md->md2.buf));
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108 md->md2.curlen = 0;
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109 return CRYPT_OK;
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110 }
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111
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112 /**
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113 Process a block of memory though the hash
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114 @param md The hash state
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115 @param in The data to hash
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116 @param inlen The length of the data (octets)
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117 @return CRYPT_OK if successful
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118 */
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119 int md2_process(hash_state *md, const unsigned char *in, unsigned long inlen)
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120 {
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121 unsigned long n;
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122 LTC_ARGCHK(md != NULL);
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123 LTC_ARGCHK(in != NULL);
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124 if (md-> md2 .curlen > sizeof(md-> md2 .buf)) {
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125 return CRYPT_INVALID_ARG;
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126 }
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127 while (inlen > 0) {
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128 n = MIN(inlen, (16 - md->md2.curlen));
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129 XMEMCPY(md->md2.buf + md->md2.curlen, in, (size_t)n);
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130 md->md2.curlen += n;
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131 in += n;
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132 inlen -= n;
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133
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134 /* is 16 bytes full? */
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diff changeset
135 if (md->md2.curlen == 16) {
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diff changeset
136 md2_compress(md);
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diff changeset
137 md2_update_chksum(md);
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diff changeset
138 md->md2.curlen = 0;
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diff changeset
139 }
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diff changeset
140 }
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141 return CRYPT_OK;
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142 }
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diff changeset
143
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144 /**
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diff changeset
145 Terminate the hash to get the digest
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diff changeset
146 @param md The hash state
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147 @param out [out] The destination of the hash (16 bytes)
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148 @return CRYPT_OK if successful
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diff changeset
149 */
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150 int md2_done(hash_state * md, unsigned char *out)
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151 {
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diff changeset
152 unsigned long i, k;
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diff changeset
153
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154 LTC_ARGCHK(md != NULL);
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parents:
diff changeset
155 LTC_ARGCHK(out != NULL);
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diff changeset
156
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diff changeset
157 if (md->md2.curlen >= sizeof(md->md2.buf)) {
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158 return CRYPT_INVALID_ARG;
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159 }
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parents:
diff changeset
160
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parents:
diff changeset
161
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
162 /* pad the message */
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diff changeset
163 k = 16 - md->md2.curlen;
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diff changeset
164 for (i = md->md2.curlen; i < 16; i++) {
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diff changeset
165 md->md2.buf[i] = (unsigned char)k;
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166 }
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diff changeset
167
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parents:
diff changeset
168 /* hash and update */
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diff changeset
169 md2_compress(md);
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diff changeset
170 md2_update_chksum(md);
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parents:
diff changeset
171
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diff changeset
172 /* hash checksum */
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diff changeset
173 XMEMCPY(md->md2.buf, md->md2.chksum, 16);
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parents:
diff changeset
174 md2_compress(md);
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diff changeset
175
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diff changeset
176 /* output is lower 16 bytes of X */
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diff changeset
177 XMEMCPY(out, md->md2.X, 16);
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178
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diff changeset
179 #ifdef LTC_CLEAN_STACK
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180 zeromem(md, sizeof(hash_state));
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parents:
diff changeset
181 #endif
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diff changeset
182 return CRYPT_OK;
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diff changeset
183 }
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184
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185 /**
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diff changeset
186 Self-test the hash
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diff changeset
187 @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
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parents:
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188 */
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diff changeset
189 int md2_test(void)
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
190 {
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diff changeset
191 #ifndef LTC_TEST
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192 return CRYPT_NOP;
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193 #else
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194 static const struct {
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195 char *msg;
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196 unsigned char md[16];
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197 } tests[] = {
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198 { "",
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199 {0x83,0x50,0xe5,0xa3,0xe2,0x4c,0x15,0x3d,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
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parents:
diff changeset
200 0xf2,0x27,0x5c,0x9f,0x80,0x69,0x27,0x73
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
201 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202 },
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 { "a",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 {0x32,0xec,0x01,0xec,0x4a,0x6d,0xac,0x72,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 0xc0,0xab,0x96,0xfb,0x34,0xc0,0xb5,0xd1
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 },
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208 { "message digest",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 {0xab,0x4f,0x49,0x6b,0xfb,0x2a,0x53,0x0b,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
210 0x21,0x9f,0xf3,0x30,0x31,0xfe,0x06,0xb0
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 },
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
213 { "abcdefghijklmnopqrstuvwxyz",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214 {0x4e,0x8d,0xdf,0xf3,0x65,0x02,0x92,0xab,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 0x5a,0x41,0x08,0xc3,0xaa,0x47,0x94,0x0b
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
217 },
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218 { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219 {0xda,0x33,0xde,0xf2,0xa4,0x2d,0xf1,0x39,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 0x75,0x35,0x28,0x46,0xc3,0x03,0x38,0xcd
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 },
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 { "12345678901234567890123456789012345678901234567890123456789012345678901234567890",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 {0xd5,0x97,0x6f,0x79,0xd8,0x3d,0x3a,0x0d,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 0xc9,0x80,0x6c,0x3c,0x66,0xf3,0xef,0xd8
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
229 int i;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 hash_state md;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 unsigned char buf[16];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 md2_init(&md);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 md2_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236 md2_done(&md, buf);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237 if (memcmp(buf, tests[i].md, 16) != 0) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 return CRYPT_FAIL_TESTVECTOR;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
240 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 return CRYPT_OK;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246
209
39d5d58461d6 Import of libtomcrypt 1.05
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parents: 191
diff changeset
247
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
248 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/md2.c,v $ */
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parents: 191
diff changeset
249 /* $Revision: 1.5 $ */
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
250 /* $Date: 2005/05/23 02:42:07 $ */