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CVSS_3.0_GUI / node_modules / nwjs-builder-phoenix / node_modules / request / node_modules / uuid / lib / sha1-browser.js
root on 7 May 2019 2 KB Initial commit
  1. // Adapted from Chris Veness' SHA1 code at
  2. // http://www.movable-type.co.uk/scripts/sha1.html
  3. 'use strict';
  4.  
  5. function f(s, x, y, z) {
  6. switch (s) {
  7. case 0: return (x & y) ^ (~x & z);
  8. case 1: return x ^ y ^ z;
  9. case 2: return (x & y) ^ (x & z) ^ (y & z);
  10. case 3: return x ^ y ^ z;
  11. }
  12. }
  13.  
  14. function ROTL(x, n) {
  15. return (x << n) | (x>>> (32 - n));
  16. }
  17.  
  18. function sha1(bytes) {
  19. var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
  20. var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
  21.  
  22. if (typeof(bytes) == 'string') {
  23. var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
  24. bytes = new Array(msg.length);
  25. for (var i = 0; i < msg.length; i++) bytes[i] = msg.charCodeAt(i);
  26. }
  27.  
  28. bytes.push(0x80);
  29.  
  30. var l = bytes.length/4 + 2;
  31. var N = Math.ceil(l/16);
  32. var M = new Array(N);
  33.  
  34. for (var i=0; i<N; i++) {
  35. M[i] = new Array(16);
  36. for (var j=0; j<16; j++) {
  37. M[i][j] =
  38. bytes[i * 64 + j * 4] << 24 |
  39. bytes[i * 64 + j * 4 + 1] << 16 |
  40. bytes[i * 64 + j * 4 + 2] << 8 |
  41. bytes[i * 64 + j * 4 + 3];
  42. }
  43. }
  44.  
  45. M[N - 1][14] = ((bytes.length - 1) * 8) /
  46. Math.pow(2, 32); M[N - 1][14] = Math.floor(M[N - 1][14]);
  47. M[N - 1][15] = ((bytes.length - 1) * 8) & 0xffffffff;
  48.  
  49. for (var i=0; i<N; i++) {
  50. var W = new Array(80);
  51.  
  52. for (var t=0; t<16; t++) W[t] = M[i][t];
  53. for (var t=16; t<80; t++) {
  54. W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);
  55. }
  56.  
  57. var a = H[0];
  58. var b = H[1];
  59. var c = H[2];
  60. var d = H[3];
  61. var e = H[4];
  62.  
  63. for (var t=0; t<80; t++) {
  64. var s = Math.floor(t/20);
  65. var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t] >>> 0;
  66. e = d;
  67. d = c;
  68. c = ROTL(b, 30) >>> 0;
  69. b = a;
  70. a = T;
  71. }
  72.  
  73. H[0] = (H[0] + a) >>> 0;
  74. H[1] = (H[1] + b) >>> 0;
  75. H[2] = (H[2] + c) >>> 0;
  76. H[3] = (H[3] + d) >>> 0;
  77. H[4] = (H[4] + e) >>> 0;
  78. }
  79.  
  80. return [
  81. H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff,
  82. H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff,
  83. H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff,
  84. H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff,
  85. H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff
  86. ];
  87. }
  88.  
  89. module.exports = sha1;
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