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MD5 函数

百度翻译的MD5 计算函数

此脚本不应直接安装,它是一个供其他脚本使用的外部库。如果您需要使用该库,请在脚本元属性加入:// @require https://update.greasyfork.org/scripts/452219/1099124/MD5%20%E5%87%BD%E6%95%B0.js

  1. function MD5(string) {
  2. function RotateLeft(lValue, iShiftBits) {
  3. return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
  4. }
  5. function AddUnsigned(lX,lY) {
  6. var lX4,lY4,lX8,lY8,lResult;
  7. lX8 = (lX & 0x80000000);
  8. lY8 = (lY & 0x80000000);
  9. lX4 = (lX & 0x40000000);
  10. lY4 = (lY & 0x40000000);
  11. lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);
  12. if (lX4 & lY4) {
  13. return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
  14. }
  15. if (lX4 | lY4) {
  16. if (lResult & 0x40000000) {
  17. return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
  18. } else {
  19. return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
  20. }
  21. } else {
  22. return (lResult ^ lX8 ^ lY8);
  23. }
  24. }
  25. function F(x,y,z) { return (x & y) | ((~x) & z); }
  26. function G(x,y,z) { return (x & z) | (y & (~z)); }
  27. function H(x,y,z) { return (x ^ y ^ z); }
  28. function I(x,y,z) { return (y ^ (x | (~z))); }
  29. function FF(a,b,c,d,x,s,ac) {
  30. a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
  31. return AddUnsigned(RotateLeft(a, s), b);
  32. };
  33. function GG(a,b,c,d,x,s,ac) {
  34. a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
  35. return AddUnsigned(RotateLeft(a, s), b);
  36. };
  37. function HH(a,b,c,d,x,s,ac) {
  38. a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
  39. return AddUnsigned(RotateLeft(a, s), b);
  40. };
  41. function II(a,b,c,d,x,s,ac) {
  42. a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
  43. return AddUnsigned(RotateLeft(a, s), b);
  44. };
  45. function ConvertToWordArray(string) {
  46. var lWordCount;
  47. var lMessageLength = string.length;
  48. var lNumberOfWords_temp1=lMessageLength + 8;
  49. var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
  50. var lNumberOfWords = (lNumberOfWords_temp2+1)*16;
  51. var lWordArray=Array(lNumberOfWords-1);
  52. var lBytePosition = 0;
  53. var lByteCount = 0;
  54. while ( lByteCount < lMessageLength ) {
  55. lWordCount = (lByteCount-(lByteCount % 4))/4;
  56. lBytePosition = (lByteCount % 4)*8;
  57. lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount)<<lBytePosition));
  58. lByteCount++;
  59. }
  60. lWordCount = (lByteCount-(lByteCount % 4))/4;
  61. lBytePosition = (lByteCount % 4)*8;
  62. lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
  63. lWordArray[lNumberOfWords-2] = lMessageLength<<3;
  64. lWordArray[lNumberOfWords-1] = lMessageLength>>>29;
  65. return lWordArray;
  66. };
  67. function WordToHex(lValue) {
  68. var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
  69. for (lCount = 0;lCount<=3;lCount++) {
  70. lByte = (lValue>>>(lCount*8)) & 255;
  71. WordToHexValue_temp = "0" + lByte.toString(16);
  72. WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
  73. }
  74. return WordToHexValue;
  75. };
  76. function Utf8Encode(string) {
  77. string = string.replace(/\r\n/g,"\n");
  78. var utftext = "";
  79. for (var n = 0; n < string.length; n++) {
  80. var c = string.charCodeAt(n);
  81. if (c < 128) {
  82. utftext += String.fromCharCode(c);
  83. }
  84. else if((c > 127) && (c < 2048)) {
  85. utftext += String.fromCharCode((c >> 6) | 192);
  86. utftext += String.fromCharCode((c & 63) | 128);
  87. }
  88. else {
  89. utftext += String.fromCharCode((c >> 12) | 224);
  90. utftext += String.fromCharCode(((c >> 6) & 63) | 128);
  91. utftext += String.fromCharCode((c & 63) | 128);
  92. }
  93. }
  94. return utftext;
  95. };
  96. var x=Array();
  97. var k,AA,BB,CC,DD,a,b,c,d;
  98. var S11=7, S12=12, S13=17, S14=22;
  99. var S21=5, S22=9 , S23=14, S24=20;
  100. var S31=4, S32=11, S33=16, S34=23;
  101. var S41=6, S42=10, S43=15, S44=21;
  102. string = Utf8Encode(string);
  103. x = ConvertToWordArray(string);
  104. a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
  105. for (k=0;k<x.length;k+=16) {
  106. AA=a; BB=b; CC=c; DD=d;
  107. a=FF(a,b,c,d,x[k+0], S11,0xD76AA478);
  108. d=FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
  109. c=FF(c,d,a,b,x[k+2], S13,0x242070DB);
  110. b=FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
  111. a=FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
  112. d=FF(d,a,b,c,x[k+5], S12,0x4787C62A);
  113. c=FF(c,d,a,b,x[k+6], S13,0xA8304613);
  114. b=FF(b,c,d,a,x[k+7], S14,0xFD469501);
  115. a=FF(a,b,c,d,x[k+8], S11,0x698098D8);
  116. d=FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
  117. c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
  118. b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
  119. a=FF(a,b,c,d,x[k+12],S11,0x6B901122);
  120. d=FF(d,a,b,c,x[k+13],S12,0xFD987193);
  121. c=FF(c,d,a,b,x[k+14],S13,0xA679438E);
  122. b=FF(b,c,d,a,x[k+15],S14,0x49B40821);
  123. a=GG(a,b,c,d,x[k+1], S21,0xF61E2562);
  124. d=GG(d,a,b,c,x[k+6], S22,0xC040B340);
  125. c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);
  126. b=GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
  127. a=GG(a,b,c,d,x[k+5], S21,0xD62F105D);
  128. d=GG(d,a,b,c,x[k+10],S22,0x2441453);
  129. c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
  130. b=GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
  131. a=GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
  132. d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);
  133. c=GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
  134. b=GG(b,c,d,a,x[k+8], S24,0x455A14ED);
  135. a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
  136. d=GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
  137. c=GG(c,d,a,b,x[k+7], S23,0x676F02D9);
  138. b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
  139. a=HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
  140. d=HH(d,a,b,c,x[k+8], S32,0x8771F681);
  141. c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
  142. b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
  143. a=HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
  144. d=HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
  145. c=HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
  146. b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
  147. a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
  148. d=HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
  149. c=HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
  150. b=HH(b,c,d,a,x[k+6], S34,0x4881D05);
  151. a=HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
  152. d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
  153. c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
  154. b=HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
  155. a=II(a,b,c,d,x[k+0], S41,0xF4292244);
  156. d=II(d,a,b,c,x[k+7], S42,0x432AFF97);
  157. c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);
  158. b=II(b,c,d,a,x[k+5], S44,0xFC93A039);
  159. a=II(a,b,c,d,x[k+12],S41,0x655B59C3);
  160. d=II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
  161. c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
  162. b=II(b,c,d,a,x[k+1], S44,0x85845DD1);
  163. a=II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
  164. d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
  165. c=II(c,d,a,b,x[k+6], S43,0xA3014314);
  166. b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);
  167. a=II(a,b,c,d,x[k+4], S41,0xF7537E82);
  168. d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);
  169. c=II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
  170. b=II(b,c,d,a,x[k+9], S44,0xEB86D391);
  171. a=AddUnsigned(a,AA);
  172. b=AddUnsigned(b,BB);
  173. c=AddUnsigned(c,CC);
  174. d=AddUnsigned(d,DD);
  175. }
  176. var temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);
  177. return temp.toLowerCase();
  178. }