137 lines
3.8 KiB
JavaScript
137 lines
3.8 KiB
JavaScript
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/*
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CryptoJS v3.1.2
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code.google.com/p/crypto-js
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(c) 2009-2013 by Jeff Mott. All rights reserved.
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code.google.com/p/crypto-js/wiki/License
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*/
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(function () {
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// Shortcuts
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var C = CryptoJS;
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var C_lib = C.lib;
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var WordArray = C_lib.WordArray;
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var Hasher = C_lib.Hasher;
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var C_algo = C.algo;
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// Reusable object
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var W = [];
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/**
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* SHA-1 hash algorithm.
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*/
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var SHA1 = C_algo.SHA1 = Hasher.extend({
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_doReset: function () {
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this._hash = new WordArray.init([
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0x67452301, 0xefcdab89,
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0x98badcfe, 0x10325476,
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0xc3d2e1f0
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]);
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},
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_doProcessBlock: function (M, offset) {
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// Shortcut
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var H = this._hash.words;
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// Working variables
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var a = H[0];
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var b = H[1];
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var c = H[2];
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var d = H[3];
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var e = H[4];
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// Computation
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for (var i = 0; i < 80; i++) {
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if (i < 16) {
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W[i] = M[offset + i] | 0;
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} else {
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var n = W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16];
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W[i] = (n << 1) | (n >>> 31);
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}
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var t = ((a << 5) | (a >>> 27)) + e + W[i];
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if (i < 20) {
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t += ((b & c) | (~b & d)) + 0x5a827999;
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} else if (i < 40) {
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t += (b ^ c ^ d) + 0x6ed9eba1;
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} else if (i < 60) {
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t += ((b & c) | (b & d) | (c & d)) - 0x70e44324;
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} else /* if (i < 80) */ {
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t += (b ^ c ^ d) - 0x359d3e2a;
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}
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e = d;
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d = c;
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c = (b << 30) | (b >>> 2);
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b = a;
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a = t;
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}
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// Intermediate hash value
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H[0] = (H[0] + a) | 0;
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H[1] = (H[1] + b) | 0;
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H[2] = (H[2] + c) | 0;
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H[3] = (H[3] + d) | 0;
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H[4] = (H[4] + e) | 0;
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},
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_doFinalize: function () {
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// Shortcuts
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var data = this._data;
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var dataWords = data.words;
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var nBitsTotal = this._nDataBytes * 8;
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var nBitsLeft = data.sigBytes * 8;
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// Add padding
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dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);
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dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = Math.floor(nBitsTotal / 0x100000000);
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dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 15] = nBitsTotal;
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data.sigBytes = dataWords.length * 4;
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// Hash final blocks
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this._process();
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// Return final computed hash
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return this._hash;
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},
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clone: function () {
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var clone = Hasher.clone.call(this);
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clone._hash = this._hash.clone();
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return clone;
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}
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});
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/**
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* Shortcut function to the hasher's object interface.
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*
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* @param {WordArray|string} message The message to hash.
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*
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* @return {WordArray} The hash.
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*
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* @static
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*
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* @example
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*
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* var hash = CryptoJS.SHA1('message');
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* var hash = CryptoJS.SHA1(wordArray);
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*/
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C.SHA1 = Hasher._createHelper(SHA1);
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/**
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* Shortcut function to the HMAC's object interface.
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*
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* @param {WordArray|string} message The message to hash.
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* @param {WordArray|string} key The secret key.
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*
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* @return {WordArray} The HMAC.
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*
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* @static
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*
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* @example
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*
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* var hmac = CryptoJS.HmacSHA1(message, key);
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*/
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C.HmacSHA1 = Hasher._createHmacHelper(SHA1);
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}());
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