public static byte[] decryptToByteArray(byte[] cipherText, byte[] secretKey)
            throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,
            BadPaddingException, InvalidAlgorithmParameterException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey, "AES");
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, new IvParameterSpec(new byte[16]));
        for (int i = 0; i < cipherText.length; i += 16) {
            try {
                baos.write(cipher.doFinal(Arrays.copyOfRange(cipherText, i, i + 16)));

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
        return baos.toByteArray();
    }
    public static byte[] encryptToByteArray(byte[] data, byte[] secretKey)
            throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,
            BadPaddingException, InvalidAlgorithmParameterException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, new IvParameterSpec(new byte[16]));
        for (int i = 0; i < data.length; i += 16) {
            try {
                baos.write(cipher.doFinal(Arrays.copyOfRange(data, i, i + 16)));

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
        return baos.toByteArray();
    }