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1 /*
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2 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
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3 * Digest Algorithm, as defined in RFC 1321.
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4 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
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5 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
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6 * Distributed under the BSD License
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7 * See http://pajhome.org.uk/crypt/md5 for more info.
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8 */
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9
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10 /*
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11 * Configurable variables. You may need to tweak these to be compatible with
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12 * the server-side, but the defaults work in most cases.
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13 */
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14 var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
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15 var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */
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16 var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */
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17
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18 /*
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19 * These are the functions you'll usually want to call
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20 * They take string arguments and return either hex or base-64 encoded strings
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21 */
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22 function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
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23 function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
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24 function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
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25 function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
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26 function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
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27 function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }
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28
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29 /*
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30 * Perform a simple self-test to see if the VM is working
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31 */
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32 function md5_vm_test()
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33 {
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34 return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
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35 }
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36
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37 /*
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38 * Calculate the MD5 of an array of little-endian words, and a bit length
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39 */
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40 function core_md5(x, len)
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41 {
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42 /* append padding */
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43 x[len >> 5] |= 0x80 << ((len) % 32);
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44 x[(((len + 64) >>> 9) << 4) + 14] = len;
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45
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46 var a = 1732584193;
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47 var b = -271733879;
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48 var c = -1732584194;
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49 var d = 271733878;
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50
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51 for(var i = 0; i < x.length; i += 16)
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52 {
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53 var olda = a;
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54 var oldb = b;
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55 var oldc = c;
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56 var oldd = d;
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57
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58 a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
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59 d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
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60 c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819);
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61 b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
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62 a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
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63 d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426);
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64 c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
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65 b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
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66 a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
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67 d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
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68 c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
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69 b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
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70 a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682);
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71 d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
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72 c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
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73 b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329);
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74
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75 a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
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76 d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
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77 c = md5_gg(c, d, a, b, x[i+11], 14, 643717713);
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78 b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
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79 a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
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80 d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083);
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81 c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
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82 b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
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83 a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438);
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84 d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
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85 c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
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86 b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501);
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87 a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
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88 d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
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89 c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473);
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90 b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
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91
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92 a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
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93 d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
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94 c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562);
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95 b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
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96 a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
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97 d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353);
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98 c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
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99 b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
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100 a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174);
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101 d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
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102 c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
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103 b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189);
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104 a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
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105 d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
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106 c = md5_hh(c, d, a, b, x[i+15], 16, 530742520);
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107 b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
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108
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109 a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
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110 d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415);
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111 c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
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112 b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
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113 a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571);
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114 d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
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115 c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
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116 b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
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117 a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
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118 d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
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119 c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
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120 b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649);
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121 a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
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122 d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
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123 c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259);
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124 b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
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125
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126 a = safe_add(a, olda);
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127 b = safe_add(b, oldb);
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128 c = safe_add(c, oldc);
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129 d = safe_add(d, oldd);
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130 }
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131 return Array(a, b, c, d);
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132
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133 }
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134
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135 /*
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136 * These functions implement the four basic operations the algorithm uses.
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137 */
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138 function md5_cmn(q, a, b, x, s, t)
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139 {
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140 return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
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141 }
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142 function md5_ff(a, b, c, d, x, s, t)
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143 {
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144 return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
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145 }
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146 function md5_gg(a, b, c, d, x, s, t)
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147 {
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148 return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
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149 }
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150 function md5_hh(a, b, c, d, x, s, t)
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151 {
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152 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
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153 }
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154 function md5_ii(a, b, c, d, x, s, t)
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155 {
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156 return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
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157 }
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158
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159 /*
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160 * Calculate the HMAC-MD5, of a key and some data
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161 */
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162 function core_hmac_md5(key, data)
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163 {
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164 var bkey = str2binl(key);
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165 if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);
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166
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167 var ipad = Array(16), opad = Array(16);
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168 for(var i = 0; i < 16; i++)
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169 {
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170 ipad[i] = bkey[i] ^ 0x36363636;
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171 opad[i] = bkey[i] ^ 0x5C5C5C5C;
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172 }
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173
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174 var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
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175 return core_md5(opad.concat(hash), 512 + 128);
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176 }
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177
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178 /*
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179 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
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180 * to work around bugs in some JS interpreters.
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181 */
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182 function safe_add(x, y)
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183 {
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184 var lsw = (x & 0xFFFF) + (y & 0xFFFF);
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185 var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
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186 return (msw << 16) | (lsw & 0xFFFF);
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187 }
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188
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189 /*
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190 * Bitwise rotate a 32-bit number to the left.
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191 */
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192 function bit_rol(num, cnt)
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193 {
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194 return (num << cnt) | (num >>> (32 - cnt));
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195 }
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196
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197 /*
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198 * Convert a string to an array of little-endian words
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199 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
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200 */
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201 function str2binl(str)
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202 {
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203 var bin = Array();
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204 var mask = (1 << chrsz) - 1;
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205 for(var i = 0; i < str.length * chrsz; i += chrsz)
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206 bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
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207 return bin;
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208 }
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209
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210 /*
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211 * Convert an array of little-endian words to a string
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212 */
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213 function binl2str(bin)
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214 {
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215 var str = "";
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216 var mask = (1 << chrsz) - 1;
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217 for(var i = 0; i < bin.length * 32; i += chrsz)
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218 str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
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219 return str;
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220 }
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221
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222 /*
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223 * Convert an array of little-endian words to a hex string.
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224 */
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225 function binl2hex(binarray)
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226 {
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227 var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
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228 var str = "";
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229 for(var i = 0; i < binarray.length * 4; i++)
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230 {
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231 str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
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232 hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF);
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233 }
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234 return str;
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235 }
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236
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237 /*
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238 * Convert an array of little-endian words to a base-64 string
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239 */
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240 function binl2b64(binarray)
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241 {
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242 var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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243 var str = "";
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244 for(var i = 0; i < binarray.length * 4; i += 3)
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245 {
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246 var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16)
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247 | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
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248 | ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
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249 for(var j = 0; j < 4; j++)
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250 {
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251 if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
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rlm@0
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252 else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
|
|
rlm@0
|
253 }
|
|
rlm@0
|
254 }
|
|
rlm@0
|
255 return str;
|
|
rlm@0
|
256 }
|
