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22 | 'use strict';
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23 |
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24 | function md5(bytes) {
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25 | if (typeof(bytes) == 'string') {
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26 | var msg = unescape(encodeURIComponent(bytes));
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27 | bytes = new Array(msg.length);
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28 | for (var i = 0; i < msg.length; i++) bytes[i] = msg.charCodeAt(i);
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29 | }
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30 |
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31 | return md5ToHexEncodedArray(
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32 | wordsToMd5(
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33 | bytesToWords(bytes)
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34 | , bytes.length * 8)
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35 | );
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36 | }
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37 |
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38 |
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39 |
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40 |
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41 |
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42 | function md5ToHexEncodedArray(input) {
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43 | var i;
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44 | var x;
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45 | var output = [];
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46 | var length32 = input.length * 32;
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47 | var hexTab = '0123456789abcdef';
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48 | var hex;
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49 |
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50 | for (i = 0; i < length32; i += 8) {
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51 | x = (input[i >> 5] >>> (i % 32)) & 0xFF;
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52 |
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53 | hex = parseInt(hexTab.charAt((x >>> 4) & 0x0F) + hexTab.charAt(x & 0x0F), 16);
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54 |
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55 | output.push(hex);
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56 | }
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57 | return output;
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58 | }
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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 | function wordsToMd5(x, len) {
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64 |
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65 | x[len >> 5] |= 0x80 << (len % 32);
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66 | x[(((len + 64) >>> 9) << 4) + 14] = len;
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67 |
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68 | var i;
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69 | var olda;
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70 | var oldb;
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71 | var oldc;
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72 | var oldd;
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73 | var a = 1732584193;
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74 | var b = -271733879;
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75 | var c = -1732584194;
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76 |
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77 | var d = 271733878;
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78 |
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79 | for (i = 0; i < x.length; i += 16) {
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80 | olda = a;
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81 | oldb = b;
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82 | oldc = c;
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83 | oldd = d;
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84 |
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85 | a = md5ff(a, b, c, d, x[i], 7, -680876936);
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86 | d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
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87 | c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
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88 | b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
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89 | a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
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90 | d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
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91 | c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
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92 | b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
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93 | a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
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94 | d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
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95 | c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
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96 | b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
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97 | a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
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98 | d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
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99 | c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
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100 | b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);
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101 |
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102 | a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
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103 | d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
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104 | c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
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105 | b = md5gg(b, c, d, a, x[i], 20, -373897302);
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106 | a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
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107 | d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
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108 | c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
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109 | b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
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110 | a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
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111 | d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
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112 | c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
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113 | b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
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114 | a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
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115 | d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
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116 | c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
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117 | b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);
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118 |
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119 | a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
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120 | d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
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121 | c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
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122 | b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
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123 | a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
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124 | d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
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125 | c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
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126 | b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
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127 | a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
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128 | d = md5hh(d, a, b, c, x[i], 11, -358537222);
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129 | c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
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130 | b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
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131 | a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
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132 | d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
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133 | c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
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134 | b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);
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135 |
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136 | a = md5ii(a, b, c, d, x[i], 6, -198630844);
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137 | d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
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138 | c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
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139 | b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
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140 | a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
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141 | d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
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142 | c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
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143 | b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
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144 | a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
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145 | d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
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146 | c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
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147 | b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
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148 | a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
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149 | d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
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150 | c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
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151 | b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);
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152 |
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153 | a = safeAdd(a, olda);
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154 | b = safeAdd(b, oldb);
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155 | c = safeAdd(c, oldc);
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156 | d = safeAdd(d, oldd);
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157 | }
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158 | return [a, b, c, d];
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159 | }
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160 |
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161 |
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162 |
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163 |
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164 |
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165 | function bytesToWords(input) {
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166 | var i;
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167 | var output = [];
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168 | output[(input.length >> 2) - 1] = undefined;
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169 | for (i = 0; i < output.length; i += 1) {
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170 | output[i] = 0;
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171 | }
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172 | var length8 = input.length * 8;
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173 | for (i = 0; i < length8; i += 8) {
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174 | output[i >> 5] |= (input[(i / 8)] & 0xFF) << (i % 32);
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175 | }
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176 |
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177 | return output;
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178 | }
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179 |
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180 |
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181 |
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182 |
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183 |
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184 | function safeAdd(x, y) {
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185 | var lsw = (x & 0xFFFF) + (y & 0xFFFF);
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186 | var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
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187 | return (msw << 16) | (lsw & 0xFFFF);
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188 | }
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189 |
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190 |
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191 |
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192 |
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193 | function bitRotateLeft(num, cnt) {
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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 |
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199 |
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200 | function md5cmn(q, a, b, x, s, t) {
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201 | return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
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202 | }
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203 | function md5ff(a, b, c, d, x, s, t) {
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204 | return md5cmn((b & c) | ((~b) & d), a, b, x, s, t);
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205 | }
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206 | function md5gg(a, b, c, d, x, s, t) {
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207 | return md5cmn((b & d) | (c & (~d)), a, b, x, s, t);
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208 | }
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209 | function md5hh(a, b, c, d, x, s, t) {
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210 | return md5cmn(b ^ c ^ d, a, b, x, s, t);
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211 | }
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212 | function md5ii(a, b, c, d, x, s, t) {
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213 | return md5cmn(c ^ (b | (~d)), a, b, x, s, t);
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214 | }
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215 |
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216 | module.exports = md5;
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