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;
        result = cipher.doFinal(data);

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

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

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

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

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

                setNetbiosName(ctx.getNetbiosName());
                byte[] sk = ctx.getSigningKey();
                if ( sk != null ) {
                    // session key is truncated to 16 bytes, right padded with 0 if shorter
                    byte[] key = new byte[16];
                    System.arraycopy(sk, 0, key, 0, Math.min(16, sk.length));
                    this.sessionKey = key;
                }