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sha1-browser.js 2.4KB

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