md5.js 7.7 KB

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  1. function md5(string) {
  2. var x = Array();
  3. var k, AA, BB, CC, DD, a, b, c, d;
  4. var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
  5. var S21 = 5, S22 = 9, S23 = 14, S24 = 20;
  6. var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
  7. var S41 = 6, S42 = 10, S43 = 15, S44 = 21;
  8. string = Utf8Encode(string);
  9. x = ConvertToWordArray(string);
  10. a = 0x67452301;
  11. b = 0xEFCDAB89;
  12. c = 0x98BADCFE;
  13. d = 0x10325476;
  14. for (k = 0; k < x.length; k += 16) {
  15. AA = a;
  16. BB = b;
  17. CC = c;
  18. DD = d;
  19. a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
  20. d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
  21. c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
  22. b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
  23. a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
  24. d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
  25. c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
  26. b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
  27. a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
  28. d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
  29. c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
  30. b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
  31. a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
  32. d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
  33. c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
  34. b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
  35. a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
  36. d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
  37. c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
  38. b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
  39. a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
  40. d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);
  41. c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
  42. b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
  43. a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
  44. d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
  45. c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
  46. b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
  47. a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
  48. d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
  49. c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
  50. b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
  51. a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
  52. d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
  53. c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
  54. b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
  55. a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
  56. d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
  57. c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
  58. b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
  59. a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
  60. d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
  61. c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
  62. b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
  63. a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
  64. d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
  65. c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
  66. b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
  67. a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);
  68. d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
  69. c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
  70. b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
  71. a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
  72. d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
  73. c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
  74. b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
  75. a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
  76. d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
  77. c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);
  78. b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
  79. a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
  80. d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
  81. c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
  82. b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
  83. a = AddUnsigned(a, AA);
  84. b = AddUnsigned(b, BB);
  85. c = AddUnsigned(c, CC);
  86. d = AddUnsigned(d, DD);
  87. }
  88. var temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d);
  89. return temp.toUpperCase();
  90. }
  91. function RotateLeft(lValue, iShiftBits) {
  92. return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
  93. }
  94. function AddUnsigned(lX, lY) {
  95. var lX4, lY4, lX8, lY8, lResult;
  96. lX8 = (lX & 0x80000000);
  97. lY8 = (lY & 0x80000000);
  98. lX4 = (lX & 0x40000000);
  99. lY4 = (lY & 0x40000000);
  100. lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
  101. if (lX4 & lY4) {
  102. return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
  103. }
  104. if (lX4 | lY4) {
  105. if (lResult & 0x40000000) {
  106. return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
  107. } else {
  108. return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
  109. }
  110. } else {
  111. return (lResult ^ lX8 ^ lY8);
  112. }
  113. }
  114. function F(x, y, z) {
  115. return (x & y) | ((~x) & z);
  116. }
  117. function G(x, y, z) {
  118. return (x & z) | (y & (~z));
  119. }
  120. function H(x, y, z) {
  121. return (x ^ y ^ z);
  122. }
  123. function I(x, y, z) {
  124. return (y ^ (x | (~z)));
  125. }
  126. function FF(a, b, c, d, x, s, ac) {
  127. a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
  128. return AddUnsigned(RotateLeft(a, s), b);
  129. }
  130. function GG(a, b, c, d, x, s, ac) {
  131. a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
  132. return AddUnsigned(RotateLeft(a, s), b);
  133. }
  134. function HH(a, b, c, d, x, s, ac) {
  135. a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
  136. return AddUnsigned(RotateLeft(a, s), b);
  137. }
  138. function II(a, b, c, d, x, s, ac) {
  139. a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
  140. return AddUnsigned(RotateLeft(a, s), b);
  141. }
  142. function ConvertToWordArray(string) {
  143. var lWordCount;
  144. var lMessageLength = string.length;
  145. var lNumberOfWords_temp1 = lMessageLength + 8;
  146. var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
  147. var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
  148. var lWordArray = Array(lNumberOfWords - 1);
  149. var lBytePosition = 0;
  150. var lByteCount = 0;
  151. while (lByteCount < lMessageLength) {
  152. lWordCount = (lByteCount - (lByteCount % 4)) / 4;
  153. lBytePosition = (lByteCount % 4) * 8;
  154. lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
  155. lByteCount++;
  156. }
  157. lWordCount = (lByteCount - (lByteCount % 4)) / 4;
  158. lBytePosition = (lByteCount % 4) * 8;
  159. lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
  160. lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
  161. lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
  162. return lWordArray;
  163. }
  164. function WordToHex(lValue) {
  165. var WordToHexValue = "", WordToHexValue_temp = "", lByte, lCount;
  166. for (lCount = 0; lCount <= 3; lCount++) {
  167. lByte = (lValue >>> (lCount * 8)) & 255;
  168. WordToHexValue_temp = "0" + lByte.toString(16);
  169. WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
  170. }
  171. return WordToHexValue;
  172. }
  173. function Utf8Encode(string) {
  174. var utftext = "";
  175. for (var n = 0; n < string.length; n++) {
  176. var c = string.charCodeAt(n);
  177. if (c < 128) {
  178. utftext += String.fromCharCode(c);
  179. } else if ((c > 127) && (c < 2048)) {
  180. utftext += String.fromCharCode((c >> 6) | 192);
  181. utftext += String.fromCharCode((c & 63) | 128);
  182. } else {
  183. utftext += String.fromCharCode((c >> 12) | 224);
  184. utftext += String.fromCharCode(((c >> 6) & 63) | 128);
  185. utftext += String.fromCharCode((c & 63) | 128);
  186. }
  187. }
  188. return utftext;
  189. }
  190. module.exports = {
  191. md5: md5
  192. }