Nodejs crypto library:
Example:
<script type="text/javascript">
var crypto = require('crypto');
var algorithm = 'aes-128-cbc';
var key = 'Secret Passphrase';
/*-----------------------------------------------------------*
* ENCRYPT: AES 128 bit, CBC *
*-----------------------------------------------------------*/
var ciphertext = _encrypt(data, key, algorithm);
/*-----------------------------------------------------------*
* DECRYPT: AES 128 bit, CBC *
*-----------------------------------------------------------*/
var plain = _decrypt(ciphertext, key, algorithm);
/********************************************************************
IMPLEMENTING FUNCTIONS...
********************************************************************/
function _encrypt(data, key, algorithm)
{
var clearEncoding = 'utf8';
var cipherEncoding = 'base64'; // hex, base64
var cipher = crypto.createCipher(algorithm, key);
var cipherChunks = [];
cipherChunks.push(cipher.update(data, clearEncoding, cipherEncoding));
cipherChunks.push(cipher.final(cipherEncoding));
return (cipherChunks);
}
function _decrypt(ciphertext, key, algorithm)
{
var clearEncoding = 'utf8';
var cipherEncoding = 'base64'; // hex, base64
var decipher = crypto.createDecipher(algorithm, key);
var plainChunks = [];
for (var i = 0;i < ciphertext.length;i++) {
plainChunks.push(decipher.update(ciphertext[i], cipherEncoding, clearEncoding));
}
plainChunks.push(decipher.final(clearEncoding));
var plaintext = plainChunks.join('');
return (plaintext);
}
</script>
The modes of operation currently available are:
And the padding schemes currently available are:
Bugs in the code:
3 Dic 2011, 12:06 - [ Decrypt corrupted: OFB, CFB and CTR ]
bug
<script type="text/javascript">
var crypto = require('crypto');
var algorithm = 'aes-128-ofb'; // aes-128-cfb, aes-128-ctr
var key = 'Secret Passphrase';
/*-----------------------------------------------------------*
* ENCRYPT: AES 128 bit, OFB *
*-----------------------------------------------------------*/
var ciphertext = _encrypt("plaintext", key, algorithm);
/*-----------------------------------------------------------*
* DECRYPT: AES 128 bit, OFB *
*-----------------------------------------------------------*/
var plain = _decrypt(ciphertext, key, algorithm);
</script>
/*** console.log */
Original cleartext: plaintex
ciphertext: QXtas5Rk
It took 1 milliseconds
plaintext deciphered: plaint
It took 0 milliseconds
different!!!
