aes 256 cbc

// Code goes here
var keySize = 256;
var ivSize = 128;
var iterations = 100;

var message = "Hello World";
var password = "Secret Password";


function encrypt (msg, pass) {
  var salt = CryptoJS.lib.WordArray.random(128/8);

  var key = CryptoJS.PBKDF2(pass, salt, {
      keySize: keySize/32,
      iterations: iterations
    });

  var iv = CryptoJS.lib.WordArray.random(128/8);

  var encrypted = CryptoJS.AES.encrypt(msg, key, {
    iv: iv,
    padding: CryptoJS.pad.Pkcs7,
    mode: CryptoJS.mode.CBC

  });

  // salt, iv will be hex 32 in length
  // append them to the ciphertext for use  in decryption
  var transitmessage = salt.toString()+ iv.toString() + encrypted.toString();
  return transitmessage;
}

function decrypt (transitmessage, pass) {
  var salt = CryptoJS.enc.Hex.parse(transitmessage.substr(0, 32));
  var iv = CryptoJS.enc.Hex.parse(transitmessage.substr(32, 32))
  var encrypted = transitmessage.substring(64);

  var key = CryptoJS.PBKDF2(pass, salt, {
      keySize: keySize/32,
      iterations: iterations
    });

  var decrypted = CryptoJS.AES.decrypt(encrypted, key, {
    iv: iv,
    padding: CryptoJS.pad.Pkcs7,
    mode: CryptoJS.mode.CBC

  })
  return decrypted;
}

var encrypted = encrypt(message, password);
var decrypted = decrypt(encrypted, password);

$('#encrypted').text("Encrypted: "+encrypted);
$('#decrypted').text("Decrypted: "+ decrypted.toString(CryptoJS.enc.Utf8) );


<!DOCTYPE html>
<html>

  <head>
    <script src="https://code.jquery.com/jquery-3.1.1.min.js"
  integrity="sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8="
  crossorigin="anonymous"></script>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/pbkdf2.js"></script>
  </head>

  <body>
    <h1>CryptoJs AES Encryption/Decryption</h1>
    <div id="encrypted"></div>
    <div id="decrypted"></div>
    <script src="script.js"></script>
  </body>

</html>