public SMB1SigningDigest ( SmbTransportInternal transport, NtlmPasswordAuthenticator auth ) throws SmbException {
        this.digest = Crypto.getMD5();
        try {
            byte[] serverEncryptionKey = transport.getServerEncryptionKey();
            switch ( transport.getContext().getConfig().getLanManCompatibility() ) {
            case 0:
            case 1:
            case 2:
                this.macSigningKey = new byte[40];