/* CryptoJS v3.1.2 code.google.com/p/crypto-js © 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 WordArray = C_lib.WordArray;
var C_enc = C.enc;

/**
 * Base64 encoding strategy.
 */
var Base64 = C_enc.Base64 = {
    /**
     * Converts a word array to a Base64 string.
     *
     * @param {WordArray} wordArray The word array.
     *
     * @return {string} The Base64 string.
     *
     * @static
     *
     * @example
     *
     *     var base64String = CryptoJS.enc.Base64.stringify(wordArray);
     */
    stringify: function (wordArray) {
        // Shortcuts
        var words = wordArray.words;
        var sigBytes = wordArray.sigBytes;
        var map = this._map;

        // Clamp excess bits
        wordArray.clamp();

        // Convert
        var base64Chars = [];
        for (var i = 0; i < sigBytes; i += 3) {
            var byte1 = (words[i >>> 2]       >>> (24 - (i % 4) * 8))       & 0xff;
            var byte2 = (words[(i + 1) >>> 2] >>> (24 - ((i + 1) % 4) * 8)) & 0xff;
            var byte3 = (words[(i + 2) >>> 2] >>> (24 - ((i + 2) % 4) * 8)) & 0xff;

            var triplet = (byte1 << 16) | (byte2 << 8) | byte3;

            for (var j = 0; (j < 4) && (i + j * 0.75 < sigBytes); j++) {
                base64Chars.push(map.charAt((triplet >>> (6 * (3 - j))) & 0x3f));
            }
        }

        // Add padding
        var paddingChar = map.charAt(64);
        if (paddingChar) {
            while (base64Chars.length % 4) {
                base64Chars.push(paddingChar);
            }
        }

        return base64Chars.join('');
    },

    /**
     * Converts a Base64 string to a word array.
     *
     * @param {string} base64Str The Base64 string.
     *
     * @return {WordArray} The word array.
     *
     * @static
     *
     * @example
     *
     *     var wordArray = CryptoJS.enc.Base64.parse(base64String);
     */
    parse: function (base64Str) {
        // Shortcuts
        var base64StrLength = base64Str.length;
        var map = this._map;

        // Ignore padding
        var paddingChar = map.charAt(64);
        if (paddingChar) {
            var paddingIndex = base64Str.indexOf(paddingChar);
            if (paddingIndex != -1) {
                base64StrLength = paddingIndex;
            }
        }

        // Convert
        var words = [];
        var nBytes = 0;
        for (var i = 0; i < base64StrLength; i++) {
            if (i % 4) {
                var bits1 = map.indexOf(base64Str.charAt(i - 1)) << ((i % 4) * 2);
                var bits2 = map.indexOf(base64Str.charAt(i)) >>> (6 - (i % 4) * 2);
                words[nBytes >>> 2] |= (bits1 | bits2) << (24 - (nBytes % 4) * 8);
                nBytes++;
            }
        }

        return WordArray.create(words, nBytes);
    },

    _map: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
};

}());