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/js/lib/Socket.IO-node/support/socket.io-client/lib/vendor/web-socket-js/flash-src/com/hurlant/crypto/hash/SHA256.as

http://github.com/onedayitwillmake/RealtimeMultiplayerNodeJs
ActionScript | 115 lines | 81 code | 12 blank | 22 comment | 5 complexity | c14bc0555970db81a87f5d2b60e4288c MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.1, MPL-2.0-no-copyleft-exception, BSD-3-Clause
  1. /**
  2. * SHA256
  3. *
  4. * An ActionScript 3 implementation of Secure Hash Algorithm, SHA-256, as defined
  5. * in FIPS PUB 180-2
  6. * Copyright (c) 2007 Henri Torgemane
  7. *
  8. * Derived from:
  9. * A JavaScript implementation of the Secure Hash Standard
  10. * Version 0.3 Copyright Angel Marin 2003-2004 - http://anmar.eu.org/
  11. * Derived from:
  12. * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
  13. * in FIPS PUB 180-1
  14. * Version 2.1a Copyright Paul Johnston 2000 - 2002.
  15. * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
  16. *
  17. * See LICENSE.txt for full license information.
  18. */
  19. package com.hurlant.crypto.hash
  20. {
  21. public class SHA256 extends SHABase implements IHash
  22. {
  23. protected static const k:Array = [
  24. 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
  25. 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
  26. 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
  27. 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
  28. 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
  29. 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
  30. 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
  31. 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2];
  32. protected var h:Array = [
  33. 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
  34. ];
  35. public function SHA256(){
  36. }
  37. public override function getHashSize():uint
  38. {
  39. return 32;
  40. }
  41. protected override function core(x:Array, len:uint):Array {
  42. /* append padding */
  43. x[len >> 5] |= 0x80 << (24 - len % 32);
  44. x[((len + 64 >> 9) << 4) + 15] = len;
  45. var w:Array = [];
  46. var a:uint = h[0];
  47. var b:uint = h[1];
  48. var c:uint = h[2];
  49. var d:uint = h[3];
  50. var e:uint = h[4];
  51. var f:uint = h[5];
  52. var g:uint = h[6];
  53. var h:uint = h[7];
  54. for (var i:uint=0; i<x.length; i+=16) {
  55. var olda:uint = a;
  56. var oldb:uint = b;
  57. var oldc:uint = c;
  58. var oldd:uint = d;
  59. var olde:uint = e;
  60. var oldf:uint = f;
  61. var oldg:uint = g;
  62. var oldh:uint = h;
  63. for (var j:uint=0; j<64; j++) {
  64. if (j<16) {
  65. w[j] = x[i+j] || 0;
  66. } else {
  67. var s0:uint = rrol(w[j-15],7)^rrol(w[j-15],18)^(w[j-15]>>>3);
  68. var s1:uint = rrol(w[j-2], 17)^rrol(w[j-2],19)^(w[j-2]>>>10);
  69. w[j] = w[j-16] + s0 + w[j-7] + s1;
  70. }
  71. var t2:uint = (rrol(a,2) ^ rrol(a,13) ^ rrol(a,22)) + ((a&b) ^ (a&c) ^ (b&c));
  72. var t1:uint = h + (rrol(e,6) ^ rrol(e,11) ^ rrol(e,25)) + ((e&f)^(g&~e)) + k[j] + w[j]
  73. h = g;
  74. g = f;
  75. f = e;
  76. e = d + t1;
  77. d = c;
  78. c = b;
  79. b = a;
  80. a = t1 + t2;
  81. }
  82. a += olda;
  83. b += oldb;
  84. c += oldc;
  85. d += oldd;
  86. e += olde;
  87. f += oldf;
  88. g += oldg;
  89. h += oldh;
  90. }
  91. return [ a,b,c,d,e,f,g,h ];
  92. }
  93. /*
  94. * Bitwise rotate a 32-bit number to the right.
  95. */
  96. protected function rrol(num:uint, cnt:uint):uint {
  97. return (num << (32-cnt)) | (num >>> cnt);
  98. }
  99. public override function toString():String {
  100. return "sha256";
  101. }
  102. }
  103. }