src/ZKEACMS.WebHost/wwwroot/lib/CryptoJS/components/rabbit.js

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/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
(function () {
    // Shortcuts
    var C = CryptoJS;
    var C_lib = C.lib;
    var StreamCipher = C_lib.StreamCipher;
    var C_algo = C.algo;

    // Reusable objects
    var S  = [];
    var C_ = [];
    var G  = [];

    /**
     * Rabbit stream cipher algorithm
     */
    var Rabbit = C_algo.Rabbit = StreamCipher.extend({
        _doReset: function () {
            // Shortcuts
            var K = this._key.words;
            var iv = this.cfg.iv;

            // Swap endian
            for (var i = 0; i < 4; i++) {
                K[i] = (((K[i] << 8)  | (K[i] >>> 24)) & 0x00ff00ff) |
                       (((K[i] << 24) | (K[i] >>> 8))  & 0xff00ff00);
            }

            // Generate initial state values
            var X = this._X = [
                K[0], (K[3] << 16) | (K[2] >>> 16),
                K[1], (K[0] << 16) | (K[3] >>> 16),
                K[2], (K[1] << 16) | (K[0] >>> 16),
                K[3], (K[2] << 16) | (K[1] >>> 16)
            ];

            // Generate initial counter values
            var C = this._C = [
                (K[2] << 16) | (K[2] >>> 16), (K[0] & 0xffff0000) | (K[1] & 0x0000ffff),
                (K[3] << 16) | (K[3] >>> 16), (K[1] & 0xffff0000) | (K[2] & 0x0000ffff),
                (K[0] << 16) | (K[0] >>> 16), (K[2] & 0xffff0000) | (K[3] & 0x0000ffff),
                (K[1] << 16) | (K[1] >>> 16), (K[3] & 0xffff0000) | (K[0] & 0x0000ffff)
            ];

            // Carry bit
            this._b = 0;

            // Iterate the system four times
            for (var i = 0; i < 4; i++) {
                nextState.call(this);
            }

            // Modify the counters
            for (var i = 0; i < 8; i++) {
                C[i] ^= X[(i + 4) & 7];