md5.js 5.8 KB

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  1. /**
  2. * http://www.myersdaily.org/joseph/javascript/md5-text.html
  3. * http://pajhome.org.uk/crypt/md5
  4. * https://github.com/wbond/md5-js
  5. */
  6. function md5cycle(x, k) {
  7. var a = x[0], b = x[1], c = x[2], d = x[3];
  8. a = ff(a, b, c, d, k[0], 7, -680876936);
  9. d = ff(d, a, b, c, k[1], 12, -389564586);
  10. c = ff(c, d, a, b, k[2], 17, 606105819);
  11. b = ff(b, c, d, a, k[3], 22, -1044525330);
  12. a = ff(a, b, c, d, k[4], 7, -176418897);
  13. d = ff(d, a, b, c, k[5], 12, 1200080426);
  14. c = ff(c, d, a, b, k[6], 17, -1473231341);
  15. b = ff(b, c, d, a, k[7], 22, -45705983);
  16. a = ff(a, b, c, d, k[8], 7, 1770035416);
  17. d = ff(d, a, b, c, k[9], 12, -1958414417);
  18. c = ff(c, d, a, b, k[10], 17, -42063);
  19. b = ff(b, c, d, a, k[11], 22, -1990404162);
  20. a = ff(a, b, c, d, k[12], 7, 1804603682);
  21. d = ff(d, a, b, c, k[13], 12, -40341101);
  22. c = ff(c, d, a, b, k[14], 17, -1502002290);
  23. b = ff(b, c, d, a, k[15], 22, 1236535329);
  24. a = gg(a, b, c, d, k[1], 5, -165796510);
  25. d = gg(d, a, b, c, k[6], 9, -1069501632);
  26. c = gg(c, d, a, b, k[11], 14, 643717713);
  27. b = gg(b, c, d, a, k[0], 20, -373897302);
  28. a = gg(a, b, c, d, k[5], 5, -701558691);
  29. d = gg(d, a, b, c, k[10], 9, 38016083);
  30. c = gg(c, d, a, b, k[15], 14, -660478335);
  31. b = gg(b, c, d, a, k[4], 20, -405537848);
  32. a = gg(a, b, c, d, k[9], 5, 568446438);
  33. d = gg(d, a, b, c, k[14], 9, -1019803690);
  34. c = gg(c, d, a, b, k[3], 14, -187363961);
  35. b = gg(b, c, d, a, k[8], 20, 1163531501);
  36. a = gg(a, b, c, d, k[13], 5, -1444681467);
  37. d = gg(d, a, b, c, k[2], 9, -51403784);
  38. c = gg(c, d, a, b, k[7], 14, 1735328473);
  39. b = gg(b, c, d, a, k[12], 20, -1926607734);
  40. a = hh(a, b, c, d, k[5], 4, -378558);
  41. d = hh(d, a, b, c, k[8], 11, -2022574463);
  42. c = hh(c, d, a, b, k[11], 16, 1839030562);
  43. b = hh(b, c, d, a, k[14], 23, -35309556);
  44. a = hh(a, b, c, d, k[1], 4, -1530992060);
  45. d = hh(d, a, b, c, k[4], 11, 1272893353);
  46. c = hh(c, d, a, b, k[7], 16, -155497632);
  47. b = hh(b, c, d, a, k[10], 23, -1094730640);
  48. a = hh(a, b, c, d, k[13], 4, 681279174);
  49. d = hh(d, a, b, c, k[0], 11, -358537222);
  50. c = hh(c, d, a, b, k[3], 16, -722521979);
  51. b = hh(b, c, d, a, k[6], 23, 76029189);
  52. a = hh(a, b, c, d, k[9], 4, -640364487);
  53. d = hh(d, a, b, c, k[12], 11, -421815835);
  54. c = hh(c, d, a, b, k[15], 16, 530742520);
  55. b = hh(b, c, d, a, k[2], 23, -995338651);
  56. a = ii(a, b, c, d, k[0], 6, -198630844);
  57. d = ii(d, a, b, c, k[7], 10, 1126891415);
  58. c = ii(c, d, a, b, k[14], 15, -1416354905);
  59. b = ii(b, c, d, a, k[5], 21, -57434055);
  60. a = ii(a, b, c, d, k[12], 6, 1700485571);
  61. d = ii(d, a, b, c, k[3], 10, -1894986606);
  62. c = ii(c, d, a, b, k[10], 15, -1051523);
  63. b = ii(b, c, d, a, k[1], 21, -2054922799);
  64. a = ii(a, b, c, d, k[8], 6, 1873313359);
  65. d = ii(d, a, b, c, k[15], 10, -30611744);
  66. c = ii(c, d, a, b, k[6], 15, -1560198380);
  67. b = ii(b, c, d, a, k[13], 21, 1309151649);
  68. a = ii(a, b, c, d, k[4], 6, -145523070);
  69. d = ii(d, a, b, c, k[11], 10, -1120210379);
  70. c = ii(c, d, a, b, k[2], 15, 718787259);
  71. b = ii(b, c, d, a, k[9], 21, -343485551);
  72. x[0] = add32(a, x[0]);
  73. x[1] = add32(b, x[1]);
  74. x[2] = add32(c, x[2]);
  75. x[3] = add32(d, x[3]);
  76. }
  77. function cmn(q, a, b, x, s, t) {
  78. a = add32(add32(a, q), add32(x, t));
  79. return add32((a << s) | (a >>> (32 - s)), b);
  80. }
  81. function ff(a, b, c, d, x, s, t) {
  82. return cmn((b & c) | ((~b) & d), a, b, x, s, t);
  83. }
  84. function gg(a, b, c, d, x, s, t) {
  85. return cmn((b & d) | (c & (~d)), a, b, x, s, t);
  86. }
  87. function hh(a, b, c, d, x, s, t) {
  88. return cmn(b ^ c ^ d, a, b, x, s, t);
  89. }
  90. function ii(a, b, c, d, x, s, t) {
  91. return cmn(c ^ (b | (~d)), a, b, x, s, t);
  92. }
  93. function md5blk(s) { /* I figured global was faster. */
  94. var md5blks = [], i; /* Andy King said do it this way. */
  95. for (i = 0; i < 64; i += 4) {
  96. md5blks[i >> 2] = s.charCodeAt(i) +
  97. (s.charCodeAt(i + 1) << 8) +
  98. (s.charCodeAt(i + 2) << 16) +
  99. (s.charCodeAt(i + 3) << 24);
  100. }
  101. return md5blks;
  102. }
  103. var hex_chr = '0123456789abcdef'.split('');
  104. function rhex(n) {
  105. var s = '', j = 0;
  106. for (; j < 4; j++)
  107. s += hex_chr[(n >> (j * 8 + 4)) & 0x0F] +
  108. hex_chr[(n >> (j * 8)) & 0x0F];
  109. return s;
  110. }
  111. function hex(x) {
  112. for (var i = 0; i < x.length; i++)
  113. x[i] = rhex(x[i]);
  114. return x.join('');
  115. }
  116. var add32 = function (a, b) {
  117. return (a + b) & 0xFFFFFFFF;
  118. }
  119. function getCtx() {
  120. var ctx = {};
  121. ctx.state = [1732584193, -271733879, -1732584194, 271733878];
  122. ctx.tail = '';
  123. ctx.size = 0;
  124. ctx.update = function (s, isBinStr) {
  125. if (!isBinStr) s = unescape(encodeURIComponent(s));
  126. ctx.size += s.length;
  127. s = ctx.tail + s;
  128. var i, state = ctx.state;
  129. for (i = 64; i <= s.length; i += 64) {
  130. md5cycle(state, md5blk(s.substring(i - 64, i)));
  131. }
  132. ctx.tail = s.substring(i - 64);
  133. return ctx;
  134. };
  135. ctx.digest = function (encode) {
  136. var i,
  137. n = ctx.size,
  138. state = ctx.state,
  139. s = ctx.tail,
  140. tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
  141. for (i = 0; i < s.length; i++)
  142. tail[i >> 2] |= s.charCodeAt(i) << ((i % 4) << 3);
  143. tail[i >> 2] |= 0x80 << ((i % 4) << 3);
  144. if (i > 55) {
  145. md5cycle(state, tail);
  146. for (i = 0; i < 16; i++) tail[i] = 0;
  147. }
  148. tail[14] = n * 8;
  149. md5cycle(state, tail);
  150. return hex(state);
  151. };
  152. return ctx;
  153. }
  154. var md5 = function (s, isBinStr) {
  155. return getCtx().update(s, isBinStr).digest('hex');
  156. }
  157. if (md5('hello') !== '5d41402abc4b2a76b9719d911017c592') {
  158. add32 = function (x, y) {
  159. var lsw = (x & 0xFFFF) + (y & 0xFFFF),
  160. msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  161. return (msw << 16) | (lsw & 0xFFFF);
  162. }
  163. }
  164. md5.getCtx = getCtx;
  165. module.exports = md5;