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132
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1 /*******************************************************************************
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2
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3 copyright: Copyright (c) 2006 Tango. All rights reserved
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4
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5 license: BSD style: see doc/license.txt for details
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6
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7 version: Initial release: Feb 2006
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8
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9 author: Regan Heath, Oskar Linde
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10
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11 This module implements the MD5 Message Digest Algorithm as described
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12 by RFC 1321 The MD5 Message-Digest Algorithm. R. Rivest. April 1992.
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13
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14 *******************************************************************************/
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15
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16 module tango.io.digest.Md5;
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17
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18 public import tango.io.digest.Md4;
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19
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20 private import tango.io.digest.MerkleDamgard;
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21
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22 /*******************************************************************************
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23
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24 *******************************************************************************/
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25
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26 final class Md5 : Md4
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27 {
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28 /***********************************************************************
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29
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30 ***********************************************************************/
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31
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32 private enum
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33 {
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34 S11 = 7,
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35 S12 = 12,
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36 S13 = 17,
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37 S14 = 22,
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38 S21 = 5,
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39 S22 = 9,
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40 S23 = 14,
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41 S24 = 20,
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42 S31 = 4,
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43 S32 = 11,
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44 S33 = 16,
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45 S34 = 23,
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46 S41 = 6,
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47 S42 = 10,
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48 S43 = 15,
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49 S44 = 21
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50 };
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51
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52 /***********************************************************************
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53
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54 Construct an Md5
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55
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56 ***********************************************************************/
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57
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58 this() { }
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59
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60
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61 /***********************************************************************
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62
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63 Performs the cipher on a block of data
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64
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65 Params:
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66 data = the block of data to cipher
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67
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68 Remarks:
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69 The actual cipher algorithm is carried out by this method on
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70 the passed block of data. This method is called for every
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71 blockSize() bytes of input data and once more with the remaining
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72 data padded to blockSize().
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73
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74 ***********************************************************************/
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75
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76 protected override void transform(ubyte[] input)
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77 {
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78 uint a,b,c,d;
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79 uint[16] x;
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80
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81 littleEndian32(input,x);
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82
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83 a = context[0];
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84 b = context[1];
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85 c = context[2];
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86 d = context[3];
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87
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88 /* Round 1 */
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89 ff(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
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90 ff(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
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91 ff(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
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92 ff(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
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93 ff(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
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94 ff(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
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95 ff(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
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96 ff(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
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97 ff(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
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98 ff(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
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99 ff(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
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100 ff(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
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101 ff(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
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102 ff(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
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103 ff(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
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104 ff(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
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105
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106 /* Round 2 */
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107 gg(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
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108 gg(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
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109 gg(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
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110 gg(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
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111 gg(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
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112 gg(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
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113 gg(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
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114 gg(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
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115 gg(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
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116 gg(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
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117 gg(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
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118 gg(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
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119 gg(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
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120 gg(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
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121 gg(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
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122 gg(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
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123
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124 /* Round 3 */
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125 hh(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
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126 hh(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
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127 hh(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
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128 hh(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
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129 hh(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
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130 hh(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
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131 hh(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
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132 hh(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
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133 hh(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
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134 hh(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
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135 hh(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
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136 hh(b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
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137 hh(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
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138 hh(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
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139 hh(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
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140 hh(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
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141
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142 /* Round 4 */ /* Md5 not md4 */
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143 ii(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
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144 ii(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
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145 ii(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
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146 ii(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
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147 ii(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
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148 ii(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
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149 ii(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
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150 ii(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
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151 ii(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
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152 ii(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
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153 ii(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
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154 ii(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
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155 ii(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
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156 ii(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
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157 ii(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
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158 ii(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
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159
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160 context[0] += a;
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161 context[1] += b;
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162 context[2] += c;
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163 context[3] += d;
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164
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165 x[] = 0;
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166 }
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167
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168 /***********************************************************************
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169
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170 ***********************************************************************/
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171
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172 private static uint g(uint x, uint y, uint z)
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173 {
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174 return (x&z)|(y&~z);
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175 }
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176
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177 /***********************************************************************
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178
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179 ***********************************************************************/
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180
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181 private static uint i(uint x, uint y, uint z)
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182 {
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183 return y^(x|~z);
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184 }
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185
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186 /***********************************************************************
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187
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188 ***********************************************************************/
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189
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190 private static void ff(inout uint a, uint b, uint c, uint d, uint x, uint s, uint ac)
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191 {
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192 a += f(b, c, d) + x + ac;
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193 a = rotateLeft(a, s);
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194 a += b;
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195 }
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196
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197 /***********************************************************************
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198
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199 ***********************************************************************/
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200
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201 private static void gg(inout uint a, uint b, uint c, uint d, uint x, uint s, uint ac)
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202 {
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203 a += g(b, c, d) + x + ac;
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204 a = rotateLeft(a, s);
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205 a += b;
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206 }
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207
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208 /***********************************************************************
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209
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210 ***********************************************************************/
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211
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212 private static void hh(inout uint a, uint b, uint c, uint d, uint x, uint s, uint ac)
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213 {
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214 a += h(b, c, d) + x + ac;
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215 a = rotateLeft(a, s);
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216 a += b;
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217 }
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218
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219 /***********************************************************************
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220
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221 ***********************************************************************/
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222
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223 private static void ii(inout uint a, uint b, uint c, uint d, uint x, uint s, uint ac)
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224 {
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225 a += i(b, c, d) + x + ac;
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226 a = rotateLeft(a, s);
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227 a += b;
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228 }
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229 }
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230
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231
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232 /*******************************************************************************
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233
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234 *******************************************************************************/
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235
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236 version (UnitTest)
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237 {
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238 unittest
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239 {
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240 static char[][] strings =
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241 [
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242 "",
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243 "a",
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244 "abc",
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245 "message digest",
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246 "abcdefghijklmnopqrstuvwxyz",
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247 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
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248 "12345678901234567890123456789012345678901234567890123456789012345678901234567890"
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249 ];
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250
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251 static char[][] results =
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252 [
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253 "d41d8cd98f00b204e9800998ecf8427e",
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254 "0cc175b9c0f1b6a831c399e269772661",
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255 "900150983cd24fb0d6963f7d28e17f72",
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256 "f96b697d7cb7938d525a2f31aaf161d0",
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257 "c3fcd3d76192e4007dfb496cca67e13b",
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258 "d174ab98d277d9f5a5611c2c9f419d9f",
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259 "57edf4a22be3c955ac49da2e2107b67a"
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260 ];
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261
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262 Md5 h = new Md5();
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263
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264 foreach (int i, char[] s; strings)
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265 {
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266 h.update(cast(ubyte[]) s);
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267 char[] d = h.hexDigest;
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268
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269 assert(d == results[i],":("~s~")("~d~")!=("~results[i]~")");
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270 }
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271 }
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272 }
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