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