encrypt.js

var password = 'BJhtfRjKnTDTtPXUBnErKDxfkiMCOLyP';
      var data = 'mytext';

var masterKey = CryptoJS.SHA256(password).toString();
var length = masterKey.length / 2
var encryptionKey = CryptoJS.enc.Hex.parse(masterKey.substr(0, length));
var hmacKey = CryptoJS.enc.Hex.parse(masterKey.substr(length));

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

var encrypted = CryptoJS.AES.encrypt(
    data,
    encryptionKey,
    {
      iv: iv,
      mode: CryptoJS.mode.CFB
    }
);

var concat = iv + encrypted;

var hash = CryptoJS.HmacSHA256(CryptoJS.enc.Hex.parse(concat), hmacKey);
var registrationKey = iv + encrypted.ciphertext + hash;