cipher-core.js

;(function (root, factory) {
	if (typeof exports === "object") {
		// CommonJS
		module.exports = exports = factory(require("./core"));
	}
	else if (typeof define === "function" && define.amd) {
		// AMD
		define(["./core"], factory);
	}
	else {
		// Global (browser)
		factory(root.CryptoJS);
	}
}(this, function (CryptoJS) {

	/**
	 * 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;
	        }
	    });
	}());


}));