aes-128

aes.js

var crypto = require('crypto');
var secret = crypto.randomBytes(24);

function encrypt(plaintext) {
    var cipher = crypto.createCipher('aes-128-cbc', secret);
    cipher.setAutoPadding(false);
    var ciphertext = '';
    for (var i=0; i < plaintext.length; i+=16) {
        ciphertext += cipher.update(plaintext.substr(i, i+16), 'utf8', 'base64');
    }
    return ciphertext.toString('base64');
}

function decrypt(ciphertext) {
    var decipher = crypto.createDecipher('aes-128-cbc', secret);
    decipher.setAutoPadding(false);
    var plaintext = decipher.update(ciphertext, 'base64', 'utf8');
    return plaintext.toString('utf8');
}

var ciphertext = encrypt(new Buffer("The secret crow ate the pie of the bear.").toString('utf8'));

console.log("Cipher text is: " + ciphertext);
console.log("Plain text is: " + decrypt(ciphertext));