File Explorer

1"use strict";2 3Object.defineProperty(exports, "__esModule", {4  value: true5});6exports.default = void 0;7 8// Adapted from Chris Veness' SHA1 code at9// http://www.movable-type.co.uk/scripts/sha1.html10function f(s, x, y, z) {11  switch (s) {12    case 0:13      return x & y ^ ~x & z;14 15    case 1:16      return x ^ y ^ z;17 18    case 2:19      return x & y ^ x & z ^ y & z;20 21    case 3:22      return x ^ y ^ z;23  }24}25 26function ROTL(x, n) {27  return x << n | x >>> 32 - n;28}29 30function sha1(bytes) {31  const K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];32  const H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];33 34  if (typeof bytes === 'string') {35    const msg = unescape(encodeURIComponent(bytes)); // UTF8 escape36 37    bytes = [];38 39    for (let i = 0; i < msg.length; ++i) {40      bytes.push(msg.charCodeAt(i));41    }42  } else if (!Array.isArray(bytes)) {43    // Convert Array-like to Array44    bytes = Array.prototype.slice.call(bytes);45  }46 47  bytes.push(0x80);48  const l = bytes.length / 4 + 2;49  const N = Math.ceil(l / 16);50  const M = new Array(N);51 52  for (let i = 0; i < N; ++i) {53    const arr = new Uint32Array(16);54 55    for (let j = 0; j < 16; ++j) {56      arr[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];57    }58 59    M[i] = arr;60  }61 62  M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);63  M[N - 1][14] = Math.floor(M[N - 1][14]);64  M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;65 66  for (let i = 0; i < N; ++i) {67    const W = new Uint32Array(80);68 69    for (let t = 0; t < 16; ++t) {70      W[t] = M[i][t];71    }72 73    for (let t = 16; t < 80; ++t) {74      W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);75    }76 77    let a = H[0];78    let b = H[1];79    let c = H[2];80    let d = H[3];81    let e = H[4];82 83    for (let t = 0; t < 80; ++t) {84      const s = Math.floor(t / 20);85      const T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t] >>> 0;86      e = d;87      d = c;88      c = ROTL(b, 30) >>> 0;89      b = a;90      a = T;91    }92 93    H[0] = H[0] + a >>> 0;94    H[1] = H[1] + b >>> 0;95    H[2] = H[2] + c >>> 0;96    H[3] = H[3] + d >>> 0;97    H[4] = H[4] + e >>> 0;98  }99 100  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];101}102 103var _default = sha1;104exports.default = _default;