| // Adapted from Chris Veness' SHA1 code at |
| // http://www.movable-type.co.uk/scripts/sha1.html |
| function f(s, x, y, z) { |
| switch (s) { |
| case 0: |
| return x & y ^ ~x & z; |
| |
| case 1: |
| return x ^ y ^ z; |
| |
| case 2: |
| return x & y ^ x & z ^ y & z; |
| |
| case 3: |
| return x ^ y ^ z; |
| } |
| } |
| |
| function ROTL(x, n) { |
| return x << n | x >>> 32 - n; |
| } |
| |
| function sha1(bytes) { |
| var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6]; |
| var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0]; |
| |
| if (typeof bytes === 'string') { |
| var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape |
| |
| bytes = []; |
| |
| for (var i = 0; i < msg.length; ++i) { |
| bytes.push(msg.charCodeAt(i)); |
| } |
| } else if (!Array.isArray(bytes)) { |
| // Convert Array-like to Array |
| bytes = Array.prototype.slice.call(bytes); |
| } |
| |
| bytes.push(0x80); |
| var l = bytes.length / 4 + 2; |
| var N = Math.ceil(l / 16); |
| var M = new Array(N); |
| |
| for (var _i = 0; _i < N; ++_i) { |
| var arr = new Uint32Array(16); |
| |
| for (var j = 0; j < 16; ++j) { |
| 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]; |
| } |
| |
| M[_i] = arr; |
| } |
| |
| M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32); |
| M[N - 1][14] = Math.floor(M[N - 1][14]); |
| M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff; |
| |
| for (var _i2 = 0; _i2 < N; ++_i2) { |
| var W = new Uint32Array(80); |
| |
| for (var t = 0; t < 16; ++t) { |
| W[t] = M[_i2][t]; |
| } |
| |
| for (var _t = 16; _t < 80; ++_t) { |
| W[_t] = ROTL(W[_t - 3] ^ W[_t - 8] ^ W[_t - 14] ^ W[_t - 16], 1); |
| } |
| |
| var a = H[0]; |
| var b = H[1]; |
| var c = H[2]; |
| var d = H[3]; |
| var e = H[4]; |
| |
| for (var _t2 = 0; _t2 < 80; ++_t2) { |
| var s = Math.floor(_t2 / 20); |
| var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[_t2] >>> 0; |
| e = d; |
| d = c; |
| c = ROTL(b, 30) >>> 0; |
| b = a; |
| a = T; |
| } |
| |
| H[0] = H[0] + a >>> 0; |
| H[1] = H[1] + b >>> 0; |
| H[2] = H[2] + c >>> 0; |
| H[3] = H[3] + d >>> 0; |
| H[4] = H[4] + e >>> 0; |
| } |
| |
| 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]; |
| } |
| |
| export default sha1; |