public static byte[] encrypt(char[] pass, byte[] toEncrypt) throws Exception {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", new BouncyCastleProvider());

        byte[] bytes = new byte[8];
        bytes[0] = (byte)0xC7;
        bytes[1] = (byte)0x73;
        bytes[2] = (byte)0x21;
        bytes[3] = (byte)0x8C;
        bytes[4] = (byte)0x7E;
        bytes[5] = (byte)0xC8;
        bytes[6] = (byte)0xEE;
        bytes[7] = (byte)0x99;

        // Generating IV.
        int ivSize = 16;
        byte[] iv = new byte[ivSize];
        SecureRandom random = new SecureRandom();
        random.nextBytes(iv);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec spec = new PBEKeySpec(pass, bytes, 65536, 128);
        SecretKey tmp = factory.generateSecret(spec);
        SecretKeySpec skey = new SecretKeySpec(tmp.getEncoded(), "AES");

        cipher.init(Cipher.ENCRYPT_MODE, skey, ivParameterSpec);
        byte[] encrypted = cipher.doFinal(toEncrypt);

        // Combine IV and encrypted part.
        byte[] encryptedIVAndText = new byte[ivSize + encrypted.length];
        System.arraycopy(iv, 0, encryptedIVAndText, 0, ivSize);
        System.arraycopy(encrypted, 0, encryptedIVAndText, ivSize, encrypted.length);

        return encryptedIVAndText;
    }