Mercurial > hg > th-libs
annotate th_crypto.c @ 674:dfabc7eef3dd
Add new functions th_split_string() and th_join_string().
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Tue, 25 Feb 2020 05:16:42 +0200 |
parents | dfed3754f7fd |
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rev | line source |
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1 /* |
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2 * MD5 implementation, modified for th-libs from |
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3 * Colin Plumb's implementation by Matti 'ccr' Hämäläinen. |
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4 * |
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5 * This code implements the MD5 message-digest algorithm. |
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6 * The algorithm is due to Ron Rivest. This code was |
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7 * written by Colin Plumb in 1993, no copyright is claimed. |
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8 * This code is in the public domain; do with it what you wish. |
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9 */ |
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10 #include "th_crypto.h" |
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11 #include "th_endian.h" |
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12 #include "th_util.h" |
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13 |
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14 |
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15 #if TH_BYTEORDER == TH_LITTLE_ENDIAN |
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16 # define th_md5_bytereverse(buf, len) /* Nothing */ |
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17 #elif TH_BYTEORDER == TH_BIG_ENDIAN |
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18 static void th_md5_bytereverse(uint8_t *buf, size_t l) |
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19 { |
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20 do |
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21 { |
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22 uint32_t t = (uint32_t) ((uint32_t) buf[3] << 8 | buf[2]) << 16 | ((uint32_t) buf[1] << 8 | buf[0]); |
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23 *(uint32_t *) buf = t; |
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24 buf += sizeof(uint32_t); |
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25 } while (--l); |
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26 } |
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27 #else |
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28 # error Unsupported endianess! |
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29 #endif |
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30 |
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31 |
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32 /* Start MD5 accumulation. Set bit count to 0 and buffer |
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33 * to mysterious initialization constants. |
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34 */ |
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35 void th_md5_init(th_md5state_t *ctx) |
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36 { |
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37 ctx->buf[0] = 0x67452301; |
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38 ctx->buf[1] = 0xefcdab89; |
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39 ctx->buf[2] = 0x98badcfe; |
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40 ctx->buf[3] = 0x10325476; |
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41 |
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42 ctx->bits[0] = 0; |
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43 ctx->bits[1] = 0; |
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44 } |
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45 |
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46 |
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47 /* The core of the MD5 algorithm, this alters an existing MD5 hash to |
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48 * reflect the addition of 16 longwords of new data. th_md5_update() |
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49 * blocks the data and converts bytes into longwords for this routine. |
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50 */ |
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51 #define F1(x, y, z) (z ^ (x & (y ^ z))) |
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52 #define F2(x, y, z) F1(z, x, y) |
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53 #define F3(x, y, z) (x ^ y ^ z) |
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54 #define F4(x, y, z) (y ^ (x | ~z)) |
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55 #define MD5STEP(f, w, x, y, z, data, s) ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
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56 |
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57 static void th_md5_transform(uint32_t buf[4], uint32_t const in[16]) |
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58 { |
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59 register uint32_t a, b, c, d; |
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60 |
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61 a = buf[0]; |
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62 b = buf[1]; |
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63 c = buf[2]; |
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64 d = buf[3]; |
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65 |
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66 MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7); |
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67 MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12); |
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68 MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17); |
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69 MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22); |
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70 MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7); |
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71 MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12); |
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72 MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17); |
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73 MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22); |
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74 MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7); |
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75 MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12); |
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76 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
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77 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
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78 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
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79 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
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80 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
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81 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
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82 |
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83 MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5); |
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84 MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9); |
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85 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
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86 MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20); |
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87 MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5); |
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88 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
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89 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
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90 MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20); |
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91 MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5); |
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92 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
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93 MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14); |
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94 MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20); |
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95 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
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96 MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9); |
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97 MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14); |
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98 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
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99 |
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100 MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4); |
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101 MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11); |
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102 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
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103 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
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104 MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4); |
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105 MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11); |
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106 MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16); |
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107 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
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108 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
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109 MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11); |
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110 MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16); |
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111 MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23); |
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112 MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4); |
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113 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
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114 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
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115 MD5STEP(F3, b, c, d, a, in[ 2] + 0xc4ac5665, 23); |
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116 |
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117 MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6); |
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118 MD5STEP(F4, d, a, b, c, in[ 7] + 0x432aff97, 10); |
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119 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
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120 MD5STEP(F4, b, c, d, a, in[ 5] + 0xfc93a039, 21); |
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121 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
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122 MD5STEP(F4, d, a, b, c, in[ 3] + 0x8f0ccc92, 10); |
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123 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
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124 MD5STEP(F4, b, c, d, a, in[ 1] + 0x85845dd1, 21); |
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125 MD5STEP(F4, a, b, c, d, in[ 8] + 0x6fa87e4f, 6); |
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126 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
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127 MD5STEP(F4, c, d, a, b, in[ 6] + 0xa3014314, 15); |
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128 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
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129 MD5STEP(F4, a, b, c, d, in[ 4] + 0xf7537e82, 6); |
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130 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
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131 MD5STEP(F4, c, d, a, b, in[ 2] + 0x2ad7d2bb, 15); |
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132 MD5STEP(F4, b, c, d, a, in[ 9] + 0xeb86d391, 21); |
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133 |
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134 buf[0] += a; |
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135 buf[1] += b; |
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136 buf[2] += c; |
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137 buf[3] += d; |
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138 } |
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139 |
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140 |
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141 /* Update context to reflect the concatenation of another buffer full |
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142 * of bytes. |
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143 */ |
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144 void th_md5_append(th_md5state_t *ctx, const uint8_t *buf, size_t len) |
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145 { |
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146 uint32_t t; |
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147 |
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148 /* Update bitcount */ |
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149 t = ctx->bits[0]; |
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150 if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
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151 ctx->bits[1]++; /* Carry from low to high */ |
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152 ctx->bits[1] += len >> 29; |
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153 |
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154 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ |
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155 |
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156 /* Handle any leading odd-sized chunks */ |
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157 if (t) |
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158 { |
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159 uint8_t *p = (uint8_t *) ctx->in + t; |
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160 |
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161 t = 64 - t; |
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162 if (len < t) |
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163 { |
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164 memcpy(p, buf, len); |
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165 return; |
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166 } |
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167 memcpy(p, buf, t); |
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168 th_md5_bytereverse(ctx->in, 16); |
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169 th_md5_transform(ctx->buf, (uint32_t *) ctx->in); |
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170 buf += t; |
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171 len -= t; |
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172 } |
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173 |
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174 /* Process data in 64-byte chunks */ |
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175 while (len >= 64) |
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176 { |
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177 memcpy(ctx->in, buf, 64); |
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178 th_md5_bytereverse(ctx->in, 16); |
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179 th_md5_transform(ctx->buf, (uint32_t *) ctx->in); |
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180 buf += 64; |
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181 len -= 64; |
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182 } |
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183 |
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184 /* Handle any remaining bytes of data. */ |
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185 memcpy(ctx->in, buf, len); |
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186 } |
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187 |
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188 |
441
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218
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189 /* Final wrapup - pad to 64-byte boundary with the bit pattern |
135
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190 * 1 0* (64-bit count of bits processed, MSB-first) |
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191 */ |
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192 void th_md5_finish(th_md5state_t *ctx, th_md5hash_t digest) |
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193 { |
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194 size_t count; |
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195 uint8_t *p; |
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196 |
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197 /* Compute number of bytes mod 64 */ |
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198 count = (ctx->bits[0] >> 3) & 0x3F; |
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199 |
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200 /* Set the first char of padding to 0x80. This is safe since there is |
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201 always at least one byte free */ |
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202 p = ctx->in + count; |
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203 *p++ = 0x80; |
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204 |
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205 /* Bytes of padding needed to make 64 bytes */ |
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206 count = 64 - 1 - count; |
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207 |
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208 /* Pad out to 56 mod 64 */ |
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209 if (count < 8) |
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210 { |
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211 /* Two lots of padding: Pad the first block to 64 bytes */ |
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212 memset(p, 0, count); |
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213 th_md5_bytereverse(ctx->in, 16); |
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214 th_md5_transform(ctx->buf, (uint32_t *) ctx->in); |
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215 |
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216 /* Now fill the next block with 56 bytes */ |
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217 memset(ctx->in, 0, 56); |
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218 } |
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219 else |
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220 { |
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221 /* Pad block to 56 bytes */ |
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222 memset(p, 0, count - 8); |
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223 } |
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224 th_md5_bytereverse(ctx->in, 14); |
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225 |
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226 /* Append length in bits and transform */ |
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227 memcpy(((uint32_t *) ctx->in) + 14, &ctx->bits[0], sizeof(uint32_t)); |
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228 memcpy(((uint32_t *) ctx->in) + 15, &ctx->bits[1], sizeof(uint32_t)); |
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229 |
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230 th_md5_transform(ctx->buf, (uint32_t *) ctx->in); |
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231 th_md5_bytereverse((uint8_t *) ctx->buf, 4); |
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232 memcpy(digest, ctx->buf, 16); |
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233 memset(ctx, 0, sizeof(*ctx)); |
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234 } |
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235 |
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236 |
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237 void th_md5_print(FILE *fp, const th_md5hash_t digest) |
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238 { |
625 | 239 for (size_t i = 0; i < TH_MD5HASH_LENGTH; i++) |
135
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240 fprintf(fp, "%02x", digest[i]); |
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241 } |
215
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242 |
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243 |
218
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244 void th_md5_append_u8(th_md5state_t *ctx, uint8_t val) |
215
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245 { |
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246 th_md5_append(ctx, &val, 1); |
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247 } |
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248 |
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249 |
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250 #define TH_DEFINE_FUNCS(xname, xtype) \ |
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251 void th_md5_append_ ## xname ## 16 (th_md5state_t *ctx, uint16_t pval) \ |
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252 { \ |
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253 uint16_t val = TH_NATIVE_TO_ ## xtype ## 16 (pval); \ |
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254 th_md5_append(ctx, (uint8_t *) &val, sizeof(val)); \ |
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255 } \ |
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256 \ |
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257 void th_md5_append_ ## xname ## 32 (th_md5state_t *ctx, uint32_t pval) \ |
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258 { \ |
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259 uint32_t val = TH_NATIVE_TO_ ## xtype ## 32 (pval); \ |
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260 th_md5_append(ctx, (uint8_t *) &val, sizeof(val)); \ |
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261 } \ |
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262 \ |
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263 void th_md5_append_ ## xname ## 64 (th_md5state_t *ctx, uint64_t pval) \ |
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264 { \ |
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265 uint64_t val = TH_NATIVE_TO_ ## xtype ## 64 (pval); \ |
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266 th_md5_append(ctx, (uint8_t *) &val, sizeof(val)); \ |
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267 } |
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268 |
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269 |
216
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270 TH_DEFINE_FUNCS(ne, NE) |
215
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271 TH_DEFINE_FUNCS(le, LE) |
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272 TH_DEFINE_FUNCS(be, BE) |