final byte[] sk = this.signKey;
        if (sk == null) {
            throw new CIFSException("Signing is not initialized");
        }

        final int seqNum = this.signSequence.getAndIncrement();
        final byte[] seqBytes = new byte[4];
        SMBUtil.writeInt4(seqNum, seqBytes, 0);

        final MessageDigest mac = Crypto.getHMACT64(sk);
        mac.update(seqBytes); // sequence

        byte[] ivec = new byte[8];
        IvParameterSpec params = new IvParameterSpec(ivec);

        SecretKeySpec skSpec = new SecretKeySpec(key.getEncoded(), "DES");
        SecretKey sk = skSpec;

        cipher.init(Cipher.DECRYPT_MODE, sk, params);

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

        decrypt = new byte[result.length];
        System.arraycopy(result, 0, decrypt, 0, result.length);

     */
    public void setupMIC(final byte[] type1, final byte[] type2) throws GeneralSecurityException, IOException {
        final byte[] sk = this.masterKey;
        if (sk == null) {
            return;
        }
        final MessageDigest mac = Crypto.getHMACT64(sk);
        mac.update(type1);
        mac.update(type2);
        final byte[] type3 = toByteArray();
        mac.update(type3);