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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 var MD5 = (function () {
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11 /*
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12 * Configurable variables. You may need to tweak these to be compatible with
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13 * the server-side, but the defaults work in most cases.
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14 */
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15 var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
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16 var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */
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17 var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */
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18
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19 /*
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20 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
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21 * to work around bugs in some JS interpreters.
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22 */
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23 var safe_add = function (x, y) {
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24 var lsw = (x & 0xFFFF) + (y & 0xFFFF);
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25 var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
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26 return (msw << 16) | (lsw & 0xFFFF);
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27 };
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28
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29 /*
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30 * Bitwise rotate a 32-bit number to the left.
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31 */
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32 var bit_rol = function (num, cnt) {
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33 return (num << cnt) | (num >>> (32 - cnt));
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34 };
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35
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36 /*
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37 * Convert a string to an array of little-endian words
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38 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
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39 */
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40 var str2binl = function (str) {
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41 var bin = [];
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42 var mask = (1 << chrsz) - 1;
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43 for(var i = 0; i < str.length * chrsz; i += chrsz)
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44 {
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45 bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
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46 }
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47 return bin;
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48 };
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49
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50 /*
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51 * Convert an array of little-endian words to a string
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52 */
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53 var binl2str = function (bin) {
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54 var str = "";
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55 var mask = (1 << chrsz) - 1;
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56 for(var i = 0; i < bin.length * 32; i += chrsz)
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57 {
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58 str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
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59 }
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60 return str;
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61 };
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62
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63 /*
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64 * Convert an array of little-endian words to a hex string.
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65 */
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66 var binl2hex = function (binarray) {
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67 var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
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68 var str = "";
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69 for(var i = 0; i < binarray.length * 4; i++)
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70 {
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71 str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
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72 hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF);
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73 }
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74 return str;
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75 };
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76
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77 /*
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78 * Convert an array of little-endian words to a base-64 string
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79 */
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80 var binl2b64 = function (binarray) {
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81 var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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82 var str = "";
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83 var triplet, j;
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84 for(var i = 0; i < binarray.length * 4; i += 3)
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85 {
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86 triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16) |
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87 (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 ) |
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88 ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
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89 for(j = 0; j < 4; j++)
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90 {
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91 if(i * 8 + j * 6 > binarray.length * 32) { str += b64pad; }
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92 else { str += tab.charAt((triplet >> 6*(3-j)) & 0x3F); }
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93 }
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94 }
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95 return str;
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96 };
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97
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98 /*
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99 * These functions implement the four basic operations the algorithm uses.
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100 */
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101 var md5_cmn = function (q, a, b, x, s, t) {
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102 return safe_add(bit_rol(safe_add(safe_add(a, q),safe_add(x, t)), s),b);
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103 };
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104
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105 var md5_ff = function (a, b, c, d, x, s, t) {
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106 return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
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107 };
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108
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109 var md5_gg = function (a, b, c, d, x, s, t) {
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110 return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
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111 };
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112
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113 var md5_hh = function (a, b, c, d, x, s, t) {
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114 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
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115 };
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116
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117 var md5_ii = function (a, b, c, d, x, s, t) {
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118 return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
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119 };
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120
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121 /*
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122 * Calculate the MD5 of an array of little-endian words, and a bit length
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123 */
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124 var core_md5 = function (x, len) {
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125 /* append padding */
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126 x[len >> 5] |= 0x80 << ((len) % 32);
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127 x[(((len + 64) >>> 9) << 4) + 14] = len;
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128
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129 var a = 1732584193;
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130 var b = -271733879;
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131 var c = -1732584194;
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132 var d = 271733878;
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133
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134 var olda, oldb, oldc, oldd;
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135 for (var i = 0; i < x.length; i += 16)
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136 {
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137 olda = a;
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138 oldb = b;
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139 oldc = c;
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140 oldd = d;
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141
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142 a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
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143 d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
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144 c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819);
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145 b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
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146 a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
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147 d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426);
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148 c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
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149 b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
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150 a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
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151 d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
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152 c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
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153 b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
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154 a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682);
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155 d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
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156 c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
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157 b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329);
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158
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159 a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
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160 d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
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161 c = md5_gg(c, d, a, b, x[i+11], 14, 643717713);
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162 b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
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163 a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
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164 d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083);
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165 c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
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166 b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
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167 a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438);
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168 d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
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169 c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
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170 b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501);
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171 a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
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172 d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
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173 c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473);
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174 b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
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175
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176 a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
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177 d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
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178 c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562);
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179 b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
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180 a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
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181 d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353);
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182 c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
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183 b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
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184 a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174);
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185 d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
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186 c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
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187 b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189);
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188 a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
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189 d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
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190 c = md5_hh(c, d, a, b, x[i+15], 16, 530742520);
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191 b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
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192
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193 a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
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194 d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415);
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195 c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
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196 b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
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197 a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571);
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198 d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
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199 c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
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200 b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
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201 a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
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202 d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
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203 c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
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204 b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649);
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205 a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
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206 d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
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207 c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259);
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208 b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
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209
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210 a = safe_add(a, olda);
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211 b = safe_add(b, oldb);
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212 c = safe_add(c, oldc);
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213 d = safe_add(d, oldd);
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214 }
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215 return [a, b, c, d];
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216 };
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217
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218
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219 /*
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220 * Calculate the HMAC-MD5, of a key and some data
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221 */
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222 var core_hmac_md5 = function (key, data) {
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223 var bkey = str2binl(key);
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224 if(bkey.length > 16) { bkey = core_md5(bkey, key.length * chrsz); }
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225
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226 var ipad = new Array(16), opad = new Array(16);
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227 for(var i = 0; i < 16; i++)
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228 {
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229 ipad[i] = bkey[i] ^ 0x36363636;
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230 opad[i] = bkey[i] ^ 0x5C5C5C5C;
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231 }
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232
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233 var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
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234 return core_md5(opad.concat(hash), 512 + 128);
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235 };
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236
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237 var obj = {
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238 /*
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239 * These are the functions you'll usually want to call.
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240 * They take string arguments and return either hex or base-64 encoded
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241 * strings.
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242 */
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243 hexdigest: function (s) {
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244 return binl2hex(core_md5(str2binl(s), s.length * chrsz));
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245 },
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246
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247 b64digest: function (s) {
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248 return binl2b64(core_md5(str2binl(s), s.length * chrsz));
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249 },
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250
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251 hash: function (s) {
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252 return binl2str(core_md5(str2binl(s), s.length * chrsz));
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253 },
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254
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255 hmac_hexdigest: function (key, data) {
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256 return binl2hex(core_hmac_md5(key, data));
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257 },
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258
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259 hmac_b64digest: function (key, data) {
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260 return binl2b64(core_hmac_md5(key, data));
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261 },
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262
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263 hmac_hash: function (key, data) {
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264 return binl2str(core_hmac_md5(key, data));
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265 },
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266
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267 /*
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268 * Perform a simple self-test to see if the VM is working
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269 */
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270 test: function () {
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271 return MD5.hexdigest("abc") === "900150983cd24fb0d6963f7d28e17f72";
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272 }
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273 };
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274
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275 return obj;
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276 })();
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