byte[] loginSucessDecrypted = decrypt(secret.getEncoded(), loginSuccessEncrypted, new IvParameterSpec(secret.getEncoded()), "AES/CFB/NoPadding", secret.getAlgorithm()) ; // packet size
        int loginPacketSize = readVarInt(loginSucessDecrypted[0]); // packet size

        if(loginPacketId != 0x02) { // We want login success
            System.out.println("Bad packet id: " + loginPacketId);

            if(loginPacketId == 0x00) { // If it's a disconnect packet
                disconnected(input);
            }
        }



public static byte[] decrypt(byte[] secretKey, byte[] data, IvParameterSpec iv, String ALGORITHM, String SecretKeyAlgo) throws Exception {
        SecretKey key = new SecretKeySpec(secretKey, SecretKeyAlgo);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, key, iv);

        // hopefully original secret converted secret and iv stay the same
        System.out.println("Lets hope these 3 are the same: " + Arrays.toString(secretKey) +" "+ Arrays.toString(key.getEncoded())+
                " "+ Arrays.toString(iv.getIV()));

        byte[] decryptedBytes = cipher.doFinal(data);

        return decryptedBytes;
    }