| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863 | /*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*//** * Cipher core components. */CryptoJS.lib.Cipher || (function (undefined) {    // Shortcuts    var C = CryptoJS;    var C_lib = C.lib;    var Base = C_lib.Base;    var WordArray = C_lib.WordArray;    var BufferedBlockAlgorithm = C_lib.BufferedBlockAlgorithm;    var C_enc = C.enc;    var Utf8 = C_enc.Utf8;    var Base64 = C_enc.Base64;    var C_algo = C.algo;    var EvpKDF = C_algo.EvpKDF;    /**     * Abstract base cipher template.     *     * @property {number} keySize This cipher's key size. Default: 4 (128 bits)     * @property {number} ivSize This cipher's IV size. Default: 4 (128 bits)     * @property {number} _ENC_XFORM_MODE A constant representing encryption mode.     * @property {number} _DEC_XFORM_MODE A constant representing decryption mode.     */    var Cipher = C_lib.Cipher = BufferedBlockAlgorithm.extend({        /**         * Configuration options.         *         * @property {WordArray} iv The IV to use for this operation.         */        cfg: Base.extend(),        /**         * Creates this cipher in encryption mode.         *         * @param {WordArray} key The key.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @return {Cipher} A cipher instance.         *         * @static         *         * @example         *         *     var cipher = CryptoJS.algo.AES.createEncryptor(keyWordArray, { iv: ivWordArray });         */        createEncryptor: function (key, cfg) {            return this.create(this._ENC_XFORM_MODE, key, cfg);        },        /**         * Creates this cipher in decryption mode.         *         * @param {WordArray} key The key.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @return {Cipher} A cipher instance.         *         * @static         *         * @example         *         *     var cipher = CryptoJS.algo.AES.createDecryptor(keyWordArray, { iv: ivWordArray });         */        createDecryptor: function (key, cfg) {            return this.create(this._DEC_XFORM_MODE, key, cfg);        },        /**         * Initializes a newly created cipher.         *         * @param {number} xformMode Either the encryption or decryption transormation mode constant.         * @param {WordArray} key The key.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @example         *         *     var cipher = CryptoJS.algo.AES.create(CryptoJS.algo.AES._ENC_XFORM_MODE, keyWordArray, { iv: ivWordArray });         */        init: function (xformMode, key, cfg) {            // Apply config defaults            this.cfg = this.cfg.extend(cfg);            // Store transform mode and key            this._xformMode = xformMode;            this._key = key;            // Set initial values            this.reset();        },        /**         * Resets this cipher to its initial state.         *         * @example         *         *     cipher.reset();         */        reset: function () {            // Reset data buffer            BufferedBlockAlgorithm.reset.call(this);            // Perform concrete-cipher logic            this._doReset();        },        /**         * Adds data to be encrypted or decrypted.         *         * @param {WordArray|string} dataUpdate The data to encrypt or decrypt.         *         * @return {WordArray} The data after processing.         *         * @example         *         *     var encrypted = cipher.process('data');         *     var encrypted = cipher.process(wordArray);         */        process: function (dataUpdate) {            // Append            this._append(dataUpdate);            // Process available blocks            return this._process();        },        /**         * Finalizes the encryption or decryption process.         * Note that the finalize operation is effectively a destructive, read-once operation.         *         * @param {WordArray|string} dataUpdate The final data to encrypt or decrypt.         *         * @return {WordArray} The data after final processing.         *         * @example         *         *     var encrypted = cipher.finalize();         *     var encrypted = cipher.finalize('data');         *     var encrypted = cipher.finalize(wordArray);         */        finalize: function (dataUpdate) {            // Final data update            if (dataUpdate) {                this._append(dataUpdate);            }            // Perform concrete-cipher logic            var finalProcessedData = this._doFinalize();            return finalProcessedData;        },        keySize: 128/32,        ivSize: 128/32,        _ENC_XFORM_MODE: 1,        _DEC_XFORM_MODE: 2,        /**         * Creates shortcut functions to a cipher's object interface.         *         * @param {Cipher} cipher The cipher to create a helper for.         *         * @return {Object} An object with encrypt and decrypt shortcut functions.         *         * @static         *         * @example         *         *     var AES = CryptoJS.lib.Cipher._createHelper(CryptoJS.algo.AES);         */        _createHelper: (function () {            function selectCipherStrategy(key) {                if (typeof key == 'string') {                    return PasswordBasedCipher;                } else {                    return SerializableCipher;                }            }            return function (cipher) {                return {                    encrypt: function (message, key, cfg) {                        return selectCipherStrategy(key).encrypt(cipher, message, key, cfg);                    },                    decrypt: function (ciphertext, key, cfg) {                        return selectCipherStrategy(key).decrypt(cipher, ciphertext, key, cfg);                    }                };            };        }())    });    /**     * Abstract base stream cipher template.     *     * @property {number} blockSize The number of 32-bit words this cipher operates on. Default: 1 (32 bits)     */    var StreamCipher = C_lib.StreamCipher = Cipher.extend({        _doFinalize: function () {            // Process partial blocks            var finalProcessedBlocks = this._process(!!'flush');            return finalProcessedBlocks;        },        blockSize: 1    });    /**     * Mode namespace.     */    var C_mode = C.mode = {};    /**     * Abstract base block cipher mode template.     */    var BlockCipherMode = C_lib.BlockCipherMode = Base.extend({        /**         * Creates this mode for encryption.         *         * @param {Cipher} cipher A block cipher instance.         * @param {Array} iv The IV words.         *         * @static         *         * @example         *         *     var mode = CryptoJS.mode.CBC.createEncryptor(cipher, iv.words);         */        createEncryptor: function (cipher, iv) {            return this.Encryptor.create(cipher, iv);        },        /**         * Creates this mode for decryption.         *         * @param {Cipher} cipher A block cipher instance.         * @param {Array} iv The IV words.         *         * @static         *         * @example         *         *     var mode = CryptoJS.mode.CBC.createDecryptor(cipher, iv.words);         */        createDecryptor: function (cipher, iv) {            return this.Decryptor.create(cipher, iv);        },        /**         * Initializes a newly created mode.         *         * @param {Cipher} cipher A block cipher instance.         * @param {Array} iv The IV words.         *         * @example         *         *     var mode = CryptoJS.mode.CBC.Encryptor.create(cipher, iv.words);         */        init: function (cipher, iv) {            this._cipher = cipher;            this._iv = iv;        }    });    /**     * Cipher Block Chaining mode.     */    var CBC = C_mode.CBC = (function () {        /**         * Abstract base CBC mode.         */        var CBC = BlockCipherMode.extend();        /**         * CBC encryptor.         */        CBC.Encryptor = CBC.extend({            /**             * Processes the data block at offset.             *             * @param {Array} words The data words to operate on.             * @param {number} offset The offset where the block starts.             *             * @example             *             *     mode.processBlock(data.words, offset);             */            processBlock: function (words, offset) {                // Shortcuts                var cipher = this._cipher;                var blockSize = cipher.blockSize;                // XOR and encrypt                xorBlock.call(this, words, offset, blockSize);                cipher.encryptBlock(words, offset);                // Remember this block to use with next block                this._prevBlock = words.slice(offset, offset + blockSize);            }        });        /**         * CBC decryptor.         */        CBC.Decryptor = CBC.extend({            /**             * Processes the data block at offset.             *             * @param {Array} words The data words to operate on.             * @param {number} offset The offset where the block starts.             *             * @example             *             *     mode.processBlock(data.words, offset);             */            processBlock: function (words, offset) {                // Shortcuts                var cipher = this._cipher;                var blockSize = cipher.blockSize;                // Remember this block to use with next block                var thisBlock = words.slice(offset, offset + blockSize);                // Decrypt and XOR                cipher.decryptBlock(words, offset);                xorBlock.call(this, words, offset, blockSize);                // This block becomes the previous block                this._prevBlock = thisBlock;            }        });        function xorBlock(words, offset, blockSize) {            // Shortcut            var iv = this._iv;            // Choose mixing block            if (iv) {                var block = iv;                // Remove IV for subsequent blocks                this._iv = undefined;            } else {                var block = this._prevBlock;            }            // XOR blocks            for (var i = 0; i < blockSize; i++) {                words[offset + i] ^= block[i];            }        }        return CBC;    }());    /**     * Padding namespace.     */    var C_pad = C.pad = {};    /**     * PKCS #5/7 padding strategy.     */    var Pkcs7 = C_pad.Pkcs7 = {        /**         * Pads data using the algorithm defined in PKCS #5/7.         *         * @param {WordArray} data The data to pad.         * @param {number} blockSize The multiple that the data should be padded to.         *         * @static         *         * @example         *         *     CryptoJS.pad.Pkcs7.pad(wordArray, 4);         */        pad: function (data, blockSize) {            // Shortcut            var blockSizeBytes = blockSize * 4;            // Count padding bytes            var nPaddingBytes = blockSizeBytes - data.sigBytes % blockSizeBytes;            // Create padding word            var paddingWord = (nPaddingBytes << 24) | (nPaddingBytes << 16) | (nPaddingBytes << 8) | nPaddingBytes;            // Create padding            var paddingWords = [];            for (var i = 0; i < nPaddingBytes; i += 4) {                paddingWords.push(paddingWord);            }            var padding = WordArray.create(paddingWords, nPaddingBytes);            // Add padding            data.concat(padding);        },        /**         * Unpads data that had been padded using the algorithm defined in PKCS #5/7.         *         * @param {WordArray} data The data to unpad.         *         * @static         *         * @example         *         *     CryptoJS.pad.Pkcs7.unpad(wordArray);         */        unpad: function (data) {            // Get number of padding bytes from last byte            var nPaddingBytes = data.words[(data.sigBytes - 1) >>> 2] & 0xff;            // Remove padding            data.sigBytes -= nPaddingBytes;        }    };    /**     * Abstract base block cipher template.     *     * @property {number} blockSize The number of 32-bit words this cipher operates on. Default: 4 (128 bits)     */    var BlockCipher = C_lib.BlockCipher = Cipher.extend({        /**         * Configuration options.         *         * @property {Mode} mode The block mode to use. Default: CBC         * @property {Padding} padding The padding strategy to use. Default: Pkcs7         */        cfg: Cipher.cfg.extend({            mode: CBC,            padding: Pkcs7        }),        reset: function () {            // Reset cipher            Cipher.reset.call(this);            // Shortcuts            var cfg = this.cfg;            var iv = cfg.iv;            var mode = cfg.mode;            // Reset block mode            if (this._xformMode == this._ENC_XFORM_MODE) {                var modeCreator = mode.createEncryptor;            } else /* if (this._xformMode == this._DEC_XFORM_MODE) */ {                var modeCreator = mode.createDecryptor;                // Keep at least one block in the buffer for unpadding                this._minBufferSize = 1;            }            this._mode = modeCreator.call(mode, this, iv && iv.words);        },        _doProcessBlock: function (words, offset) {            this._mode.processBlock(words, offset);        },        _doFinalize: function () {            // Shortcut            var padding = this.cfg.padding;            // Finalize            if (this._xformMode == this._ENC_XFORM_MODE) {                // Pad data                padding.pad(this._data, this.blockSize);                // Process final blocks                var finalProcessedBlocks = this._process(!!'flush');            } else /* if (this._xformMode == this._DEC_XFORM_MODE) */ {                // Process final blocks                var finalProcessedBlocks = this._process(!!'flush');                // Unpad data                padding.unpad(finalProcessedBlocks);            }            return finalProcessedBlocks;        },        blockSize: 128/32    });    /**     * A collection of cipher parameters.     *     * @property {WordArray} ciphertext The raw ciphertext.     * @property {WordArray} key The key to this ciphertext.     * @property {WordArray} iv The IV used in the ciphering operation.     * @property {WordArray} salt The salt used with a key derivation function.     * @property {Cipher} algorithm The cipher algorithm.     * @property {Mode} mode The block mode used in the ciphering operation.     * @property {Padding} padding The padding scheme used in the ciphering operation.     * @property {number} blockSize The block size of the cipher.     * @property {Format} formatter The default formatting strategy to convert this cipher params object to a string.     */    var CipherParams = C_lib.CipherParams = Base.extend({        /**         * Initializes a newly created cipher params object.         *         * @param {Object} cipherParams An object with any of the possible cipher parameters.         *         * @example         *         *     var cipherParams = CryptoJS.lib.CipherParams.create({         *         ciphertext: ciphertextWordArray,         *         key: keyWordArray,         *         iv: ivWordArray,         *         salt: saltWordArray,         *         algorithm: CryptoJS.algo.AES,         *         mode: CryptoJS.mode.CBC,         *         padding: CryptoJS.pad.PKCS7,         *         blockSize: 4,         *         formatter: CryptoJS.format.OpenSSL         *     });         */        init: function (cipherParams) {            this.mixIn(cipherParams);        },        /**         * Converts this cipher params object to a string.         *         * @param {Format} formatter (Optional) The formatting strategy to use.         *         * @return {string} The stringified cipher params.         *         * @throws Error If neither the formatter nor the default formatter is set.         *         * @example         *         *     var string = cipherParams + '';         *     var string = cipherParams.toString();         *     var string = cipherParams.toString(CryptoJS.format.OpenSSL);         */        toString: function (formatter) {            return (formatter || this.formatter).stringify(this);        }    });    /**     * Format namespace.     */    var C_format = C.format = {};    /**     * OpenSSL formatting strategy.     */    var OpenSSLFormatter = C_format.OpenSSL = {        /**         * Converts a cipher params object to an OpenSSL-compatible string.         *         * @param {CipherParams} cipherParams The cipher params object.         *         * @return {string} The OpenSSL-compatible string.         *         * @static         *         * @example         *         *     var openSSLString = CryptoJS.format.OpenSSL.stringify(cipherParams);         */        stringify: function (cipherParams) {            // Shortcuts            var ciphertext = cipherParams.ciphertext;            var salt = cipherParams.salt;            // Format            if (salt) {                var wordArray = WordArray.create([0x53616c74, 0x65645f5f]).concat(salt).concat(ciphertext);            } else {                var wordArray = ciphertext;            }            return wordArray.toString(Base64);        },        /**         * Converts an OpenSSL-compatible string to a cipher params object.         *         * @param {string} openSSLStr The OpenSSL-compatible string.         *         * @return {CipherParams} The cipher params object.         *         * @static         *         * @example         *         *     var cipherParams = CryptoJS.format.OpenSSL.parse(openSSLString);         */        parse: function (openSSLStr) {            // Parse base64            var ciphertext = Base64.parse(openSSLStr);            // Shortcut            var ciphertextWords = ciphertext.words;            // Test for salt            if (ciphertextWords[0] == 0x53616c74 && ciphertextWords[1] == 0x65645f5f) {                // Extract salt                var salt = WordArray.create(ciphertextWords.slice(2, 4));                // Remove salt from ciphertext                ciphertextWords.splice(0, 4);                ciphertext.sigBytes -= 16;            }            return CipherParams.create({ ciphertext: ciphertext, salt: salt });        }    };    /**     * A cipher wrapper that returns ciphertext as a serializable cipher params object.     */    var SerializableCipher = C_lib.SerializableCipher = Base.extend({        /**         * Configuration options.         *         * @property {Formatter} format The formatting strategy to convert cipher param objects to and from a string. Default: OpenSSL         */        cfg: Base.extend({            format: OpenSSLFormatter        }),        /**         * Encrypts a message.         *         * @param {Cipher} cipher The cipher algorithm to use.         * @param {WordArray|string} message The message to encrypt.         * @param {WordArray} key The key.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @return {CipherParams} A cipher params object.         *         * @static         *         * @example         *         *     var ciphertextParams = CryptoJS.lib.SerializableCipher.encrypt(CryptoJS.algo.AES, message, key);         *     var ciphertextParams = CryptoJS.lib.SerializableCipher.encrypt(CryptoJS.algo.AES, message, key, { iv: iv });         *     var ciphertextParams = CryptoJS.lib.SerializableCipher.encrypt(CryptoJS.algo.AES, message, key, { iv: iv, format: CryptoJS.format.OpenSSL });         */        encrypt: function (cipher, message, key, cfg) {            // Apply config defaults            cfg = this.cfg.extend(cfg);            // Encrypt            var encryptor = cipher.createEncryptor(key, cfg);            var ciphertext = encryptor.finalize(message);            // Shortcut            var cipherCfg = encryptor.cfg;            // Create and return serializable cipher params            return CipherParams.create({                ciphertext: ciphertext,                key: key,                iv: cipherCfg.iv,                algorithm: cipher,                mode: cipherCfg.mode,                padding: cipherCfg.padding,                blockSize: cipher.blockSize,                formatter: cfg.format            });        },        /**         * Decrypts serialized ciphertext.         *         * @param {Cipher} cipher The cipher algorithm to use.         * @param {CipherParams|string} ciphertext The ciphertext to decrypt.         * @param {WordArray} key The key.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @return {WordArray} The plaintext.         *         * @static         *         * @example         *         *     var plaintext = CryptoJS.lib.SerializableCipher.decrypt(CryptoJS.algo.AES, formattedCiphertext, key, { iv: iv, format: CryptoJS.format.OpenSSL });         *     var plaintext = CryptoJS.lib.SerializableCipher.decrypt(CryptoJS.algo.AES, ciphertextParams, key, { iv: iv, format: CryptoJS.format.OpenSSL });         */        decrypt: function (cipher, ciphertext, key, cfg) {            // Apply config defaults            cfg = this.cfg.extend(cfg);            // Convert string to CipherParams            ciphertext = this._parse(ciphertext, cfg.format);            // Decrypt            var plaintext = cipher.createDecryptor(key, cfg).finalize(ciphertext.ciphertext);            return plaintext;        },        /**         * Converts serialized ciphertext to CipherParams,         * else assumed CipherParams already and returns ciphertext unchanged.         *         * @param {CipherParams|string} ciphertext The ciphertext.         * @param {Formatter} format The formatting strategy to use to parse serialized ciphertext.         *         * @return {CipherParams} The unserialized ciphertext.         *         * @static         *         * @example         *         *     var ciphertextParams = CryptoJS.lib.SerializableCipher._parse(ciphertextStringOrParams, format);         */        _parse: function (ciphertext, format) {            if (typeof ciphertext == 'string') {                return format.parse(ciphertext, this);            } else {                return ciphertext;            }        }    });    /**     * Key derivation function namespace.     */    var C_kdf = C.kdf = {};    /**     * OpenSSL key derivation function.     */    var OpenSSLKdf = C_kdf.OpenSSL = {        /**         * Derives a key and IV from a password.         *         * @param {string} password The password to derive from.         * @param {number} keySize The size in words of the key to generate.         * @param {number} ivSize The size in words of the IV to generate.         * @param {WordArray|string} salt (Optional) A 64-bit salt to use. If omitted, a salt will be generated randomly.         *         * @return {CipherParams} A cipher params object with the key, IV, and salt.         *         * @static         *         * @example         *         *     var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32);         *     var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32, 'saltsalt');         */        execute: function (password, keySize, ivSize, salt) {            // Generate random salt            if (!salt) {                salt = WordArray.random(64/8);            }            // Derive key and IV            var key = EvpKDF.create({ keySize: keySize + ivSize }).compute(password, salt);            // Separate key and IV            var iv = WordArray.create(key.words.slice(keySize), ivSize * 4);            key.sigBytes = keySize * 4;            // Return params            return CipherParams.create({ key: key, iv: iv, salt: salt });        }    };    /**     * A serializable cipher wrapper that derives the key from a password,     * and returns ciphertext as a serializable cipher params object.     */    var PasswordBasedCipher = C_lib.PasswordBasedCipher = SerializableCipher.extend({        /**         * Configuration options.         *         * @property {KDF} kdf The key derivation function to use to generate a key and IV from a password. Default: OpenSSL         */        cfg: SerializableCipher.cfg.extend({            kdf: OpenSSLKdf        }),        /**         * Encrypts a message using a password.         *         * @param {Cipher} cipher The cipher algorithm to use.         * @param {WordArray|string} message The message to encrypt.         * @param {string} password The password.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @return {CipherParams} A cipher params object.         *         * @static         *         * @example         *         *     var ciphertextParams = CryptoJS.lib.PasswordBasedCipher.encrypt(CryptoJS.algo.AES, message, 'password');         *     var ciphertextParams = CryptoJS.lib.PasswordBasedCipher.encrypt(CryptoJS.algo.AES, message, 'password', { format: CryptoJS.format.OpenSSL });         */        encrypt: function (cipher, message, password, cfg) {            // Apply config defaults            cfg = this.cfg.extend(cfg);            // Derive key and other params            var derivedParams = cfg.kdf.execute(password, cipher.keySize, cipher.ivSize);            // Add IV to config            cfg.iv = derivedParams.iv;            // Encrypt            var ciphertext = SerializableCipher.encrypt.call(this, cipher, message, derivedParams.key, cfg);            // Mix in derived params            ciphertext.mixIn(derivedParams);            return ciphertext;        },        /**         * Decrypts serialized ciphertext using a password.         *         * @param {Cipher} cipher The cipher algorithm to use.         * @param {CipherParams|string} ciphertext The ciphertext to decrypt.         * @param {string} password The password.         * @param {Object} cfg (Optional) The configuration options to use for this operation.         *         * @return {WordArray} The plaintext.         *         * @static         *         * @example         *         *     var plaintext = CryptoJS.lib.PasswordBasedCipher.decrypt(CryptoJS.algo.AES, formattedCiphertext, 'password', { format: CryptoJS.format.OpenSSL });         *     var plaintext = CryptoJS.lib.PasswordBasedCipher.decrypt(CryptoJS.algo.AES, ciphertextParams, 'password', { format: CryptoJS.format.OpenSSL });         */        decrypt: function (cipher, ciphertext, password, cfg) {            // Apply config defaults            cfg = this.cfg.extend(cfg);            // Convert string to CipherParams            ciphertext = this._parse(ciphertext, cfg.format);            // Derive key and other params            var derivedParams = cfg.kdf.execute(password, cipher.keySize, cipher.ivSize, ciphertext.salt);            // Add IV to config            cfg.iv = derivedParams.iv;            // Decrypt            var plaintext = SerializableCipher.decrypt.call(this, cipher, ciphertext, derivedParams.key, cfg);            return plaintext;        }    });}());
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