| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109 | /*CryptoJS v3.1.2code.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 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+/='    };}());
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