.unwrap(SmbTransportInternal.class) ) {
            trans.ensureConnected();
            return trans.getServerEncryptionKey();
        }
        catch ( SmbException e ) {
            throw e;
        }
        catch ( IOException e ) {
            throw new SmbException("Connection failed", e);
        }
    }

    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];

                    ssn.treeConnectLogon();
                }
            }
            return new NtlmChallenge(trans.getServerEncryptionKey(), dc);
        }
        catch ( SmbException e ) {
            throw e;
        }
        catch ( IOException e ) {
            throw new SmbException("Connection failed", e);
        }
    }