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864
src/js/lib/cryptojs/cipher-core.js
Executable file
864
src/js/lib/cryptojs/cipher-core.js
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/*
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CryptoJS v3.1.2
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code.google.com/p/crypto-js
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(c) 2009-2013 by Jeff Mott. All rights reserved.
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code.google.com/p/crypto-js/wiki/License
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*/
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/**
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||||
* Cipher core components.
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*/
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||||
CryptoJS.lib.Cipher || (function (undefined) {
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// Shortcuts
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||||
var C = CryptoJS;
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||||
var C_lib = C.lib;
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var Base = C_lib.Base;
|
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var WordArray = C_lib.WordArray;
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||||
var BufferedBlockAlgorithm = C_lib.BufferedBlockAlgorithm;
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var C_enc = C.enc;
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var Utf8 = C_enc.Utf8;
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var Base64 = C_enc.Base64;
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var C_algo = C.algo;
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var EvpKDF = C_algo.EvpKDF;
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/**
|
||||
* Abstract base cipher template.
|
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*
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* @property {number} keySize This cipher's key size. Default: 4 (128 bits)
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* @property {number} ivSize This cipher's IV size. Default: 4 (128 bits)
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* @property {number} _ENC_XFORM_MODE A constant representing encryption mode.
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* @property {number} _DEC_XFORM_MODE A constant representing decryption mode.
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*/
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var Cipher = C_lib.Cipher = BufferedBlockAlgorithm.extend({
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||||
/**
|
||||
* Configuration options.
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||||
*
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* @property {WordArray} iv The IV to use for this operation.
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||||
*/
|
||||
cfg: Base.extend(),
|
||||
|
||||
/**
|
||||
* Creates this cipher in encryption mode.
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||||
*
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||||
* @param {WordArray} key The key.
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||||
* @param {Object} cfg (Optional) The configuration options to use for this operation.
|
||||
*
|
||||
* @return {Cipher} A cipher instance.
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||||
*
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||||
* @static
|
||||
*
|
||||
* @example
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||||
*
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||||
* var cipher = CryptoJS.algo.AES.createEncryptor(keyWordArray, { iv: ivWordArray });
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||||
*/
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createEncryptor: function (key, cfg) {
|
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return this.create(this._ENC_XFORM_MODE, key, cfg);
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||||
},
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||||
|
||||
/**
|
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* Creates this cipher in decryption mode.
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*
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* @param {WordArray} key The key.
|
||||
* @param {Object} cfg (Optional) The configuration options to use for this operation.
|
||||
*
|
||||
* @return {Cipher} A cipher instance.
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||||
*
|
||||
* @static
|
||||
*
|
||||
* @example
|
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*
|
||||
* var cipher = CryptoJS.algo.AES.createDecryptor(keyWordArray, { iv: ivWordArray });
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||||
*/
|
||||
createDecryptor: function (key, cfg) {
|
||||
return this.create(this._DEC_XFORM_MODE, key, cfg);
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},
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|
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/**
|
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* Initializes a newly created cipher.
|
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*
|
||||
* @param {number} xformMode Either the encryption or decryption transormation mode constant.
|
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* @param {WordArray} key The key.
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* @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 });
|
||||
*/
|
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init: function (xformMode, key, cfg) {
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// Apply config defaults
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this.cfg = this.cfg.extend(cfg);
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|
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// Store transform mode and key
|
||||
this._xformMode = xformMode;
|
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this._key = key;
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|
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// Set initial values
|
||||
this.reset();
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||||
},
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||||
|
||||
/**
|
||||
* 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);
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||||
|
||||
// Process available blocks
|
||||
return this._process();
|
||||
},
|
||||
|
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/**
|
||||
* Finalizes the encryption or decryption process.
|
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* 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');
|
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* var encrypted = cipher.finalize(wordArray);
|
||||
*/
|
||||
finalize: function (dataUpdate) {
|
||||
// Final data update
|
||||
if (dataUpdate) {
|
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this._append(dataUpdate);
|
||||
}
|
||||
|
||||
// Perform concrete-cipher logic
|
||||
var finalProcessedData = this._doFinalize();
|
||||
|
||||
return finalProcessedData;
|
||||
},
|
||||
|
||||
keySize: 128/32,
|
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|
||||
ivSize: 128/32,
|
||||
|
||||
_ENC_XFORM_MODE: 1,
|
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|
||||
_DEC_XFORM_MODE: 2,
|
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|
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/**
|
||||
* Creates shortcut functions to a cipher's object interface.
|
||||
*
|
||||
* @param {Cipher} cipher The cipher to create a helper for.
|
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*
|
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* @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
|
||||
// MODIFIED: added cfg.salt param
|
||||
var derivedParams = cfg.kdf.execute(password, cipher.keySize, cipher.ivSize, cfg.salt);
|
||||
|
||||
// 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;
|
||||
}
|
||||
});
|
||||
}());
|
Loading…
Add table
Add a link
Reference in a new issue