System.arraycopy(trunc, 0, sig, 4, 8); // checksum
        SMBUtil.writeInt4(seqNum, sig, 12); // seqNum

        return sig;
    }

    @Override
    public void verifyMIC(final byte[] data, final byte[] mic) throws CIFSException {
        final byte[] sk = this.verifyKey;
        if (sk == null) {
            throw new CIFSException("Signing is not initialized");
        }