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11 |
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12 | var hex_chr = "0123456789abcdef";
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13 | function rhex(num)
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14 | {
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15 | str = "";
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16 | for(j = 0; j <= 3; j++)
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17 | str += hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) +
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18 | hex_chr.charAt((num >> (j * 8)) & 0x0F);
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19 | return str;
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20 | }
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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 | function str2blks_MD5(str)
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27 | {
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28 | nblk = ((str.length + 8) >> 6) + 1;
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29 | blks = new Array(nblk * 16);
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30 | for(i = 0; i < nblk * 16; i++) blks[i] = 0;
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31 | for(i = 0; i < str.length; i++)
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32 | blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);
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33 | blks[i >> 2] |= 0x80 << ((i % 4) * 8);
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34 | blks[nblk * 16 - 2] = str.length * 8;
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35 | return blks;
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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 add(x, y)
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43 | {
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44 | var lsw = (x & 0xFFFF) + (y & 0xFFFF);
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45 | var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
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46 | return (msw << 16) | (lsw & 0xFFFF);
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47 | }
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48 |
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49 |
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50 |
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51 |
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52 | function rol(num, cnt)
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53 | {
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54 | return (num << cnt) | (num >>> (32 - cnt));
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55 | }
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56 |
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57 |
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58 |
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59 |
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60 |
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61 | function cmn(q, a, b, x, s, t)
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62 | {
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63 | return add(rol(add(add(a, q), add(x, t)), s), b);
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64 | }
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65 | function ff(a, b, c, d, x, s, t)
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66 | {
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67 | return cmn((b & c) | ((~b) & d), a, b, x, s, t);
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68 | }
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69 | function gg(a, b, c, d, x, s, t)
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70 | {
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71 | return cmn((b & d) | (c & (~d)), a, b, x, s, t);
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72 | }
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73 | function hh(a, b, c, d, x, s, t)
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74 | {
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75 | return cmn(b ^ c ^ d, a, b, x, s, t);
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76 | }
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77 | function ii(a, b, c, d, x, s, t)
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78 | {
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79 | return cmn(c ^ (b | (~d)), a, b, x, s, t);
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80 | }
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81 |
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82 |
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83 |
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84 |
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85 | exports.calcMD5=function calcMD5(str)
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86 | {
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87 | x = str2blks_MD5(str);
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88 | a = 1732584193;
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89 | b = -271733879;
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90 | c = -1732584194;
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91 | d = 271733878;
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92 |
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93 | for(i = 0; i < x.length; i += 16)
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94 | {
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95 | olda = a;
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96 | oldb = b;
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97 | oldc = c;
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98 | oldd = d;
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99 |
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100 | a = ff(a, b, c, d, x[i+ 0], 7 , -680876936);
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101 | d = ff(d, a, b, c, x[i+ 1], 12, -389564586);
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102 | c = ff(c, d, a, b, x[i+ 2], 17, 606105819);
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103 | b = ff(b, c, d, a, x[i+ 3], 22, -1044525330);
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104 | a = ff(a, b, c, d, x[i+ 4], 7 , -176418897);
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105 | d = ff(d, a, b, c, x[i+ 5], 12, 1200080426);
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106 | c = ff(c, d, a, b, x[i+ 6], 17, -1473231341);
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107 | b = ff(b, c, d, a, x[i+ 7], 22, -45705983);
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108 | a = ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
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109 | d = ff(d, a, b, c, x[i+ 9], 12, -1958414417);
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110 | c = ff(c, d, a, b, x[i+10], 17, -42063);
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111 | b = ff(b, c, d, a, x[i+11], 22, -1990404162);
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112 | a = ff(a, b, c, d, x[i+12], 7 , 1804603682);
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113 | d = ff(d, a, b, c, x[i+13], 12, -40341101);
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114 | c = ff(c, d, a, b, x[i+14], 17, -1502002290);
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115 | b = ff(b, c, d, a, x[i+15], 22, 1236535329);
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116 |
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117 | a = gg(a, b, c, d, x[i+ 1], 5 , -165796510);
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118 | d = gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
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119 | c = gg(c, d, a, b, x[i+11], 14, 643717713);
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120 | b = gg(b, c, d, a, x[i+ 0], 20, -373897302);
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121 | a = gg(a, b, c, d, x[i+ 5], 5 , -701558691);
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122 | d = gg(d, a, b, c, x[i+10], 9 , 38016083);
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123 | c = gg(c, d, a, b, x[i+15], 14, -660478335);
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124 | b = gg(b, c, d, a, x[i+ 4], 20, -405537848);
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125 | a = gg(a, b, c, d, x[i+ 9], 5 , 568446438);
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126 | d = gg(d, a, b, c, x[i+14], 9 , -1019803690);
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127 | c = gg(c, d, a, b, x[i+ 3], 14, -187363961);
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128 | b = gg(b, c, d, a, x[i+ 8], 20, 1163531501);
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129 | a = gg(a, b, c, d, x[i+13], 5 , -1444681467);
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130 | d = gg(d, a, b, c, x[i+ 2], 9 , -51403784);
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131 | c = gg(c, d, a, b, x[i+ 7], 14, 1735328473);
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132 | b = gg(b, c, d, a, x[i+12], 20, -1926607734);
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133 |
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134 | a = hh(a, b, c, d, x[i+ 5], 4 , -378558);
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135 | d = hh(d, a, b, c, x[i+ 8], 11, -2022574463);
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136 | c = hh(c, d, a, b, x[i+11], 16, 1839030562);
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137 | b = hh(b, c, d, a, x[i+14], 23, -35309556);
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138 | a = hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
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139 | d = hh(d, a, b, c, x[i+ 4], 11, 1272893353);
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140 | c = hh(c, d, a, b, x[i+ 7], 16, -155497632);
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141 | b = hh(b, c, d, a, x[i+10], 23, -1094730640);
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142 | a = hh(a, b, c, d, x[i+13], 4 , 681279174);
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143 | d = hh(d, a, b, c, x[i+ 0], 11, -358537222);
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144 | c = hh(c, d, a, b, x[i+ 3], 16, -722521979);
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145 | b = hh(b, c, d, a, x[i+ 6], 23, 76029189);
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146 | a = hh(a, b, c, d, x[i+ 9], 4 , -640364487);
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147 | d = hh(d, a, b, c, x[i+12], 11, -421815835);
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148 | c = hh(c, d, a, b, x[i+15], 16, 530742520);
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149 | b = hh(b, c, d, a, x[i+ 2], 23, -995338651);
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150 |
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151 | a = ii(a, b, c, d, x[i+ 0], 6 , -198630844);
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152 | d = ii(d, a, b, c, x[i+ 7], 10, 1126891415);
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153 | c = ii(c, d, a, b, x[i+14], 15, -1416354905);
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154 | b = ii(b, c, d, a, x[i+ 5], 21, -57434055);
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155 | a = ii(a, b, c, d, x[i+12], 6 , 1700485571);
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156 | d = ii(d, a, b, c, x[i+ 3], 10, -1894986606);
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157 | c = ii(c, d, a, b, x[i+10], 15, -1051523);
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158 | b = ii(b, c, d, a, x[i+ 1], 21, -2054922799);
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159 | a = ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
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160 | d = ii(d, a, b, c, x[i+15], 10, -30611744);
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161 | c = ii(c, d, a, b, x[i+ 6], 15, -1560198380);
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162 | b = ii(b, c, d, a, x[i+13], 21, 1309151649);
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163 | a = ii(a, b, c, d, x[i+ 4], 6 , -145523070);
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164 | d = ii(d, a, b, c, x[i+11], 10, -1120210379);
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165 | c = ii(c, d, a, b, x[i+ 2], 15, 718787259);
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166 | b = ii(b, c, d, a, x[i+ 9], 21, -343485551);
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167 |
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168 | a = add(a, olda);
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169 | b = add(b, oldb);
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170 | c = add(c, oldc);
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171 | d = add(d, oldd);
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172 | }
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173 | return rhex(a) + rhex(b) + rhex(c) + rhex(d);
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174 | }
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175 |
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