Convert Java code to Netsuite Script for Two factor Security Protocol Authentication for API Integra

We are trying to implement 2 factor authentication for third party REST API in Netsuite. I keep running into issues with AES decryption part. Please see the example of the code below in Java. I need to convert it into suitescript.


    public static String decrypt(String encryptedData, String key) throws Exception
    {
        byte[] keyData = new byte[16];
        System.arraycopy(key.getBytes(Charset.forName("UTF-8")), 0, keyData, 0, key.length());
        Key secretKey = new SecretKeySpec(keyData, ALGO);
        Cipher c = Cipher.getInstance(ALGO);
        c.init(2, secretKey);
        return new String(c.doFinal(Base64.decodeBase64(encryptedData)));
    }

and this is the test data

decrypt("BjlDBJPu9VkmRJqOy5EgaA==","Test12");
/******challenge******/
BjlDBJPu9VkmRJqOy5EgaA==