public String getNetbiosName() {
        return null;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#getSigningKey()
     */
    @Override
    public byte[] getSigningKey() throws CIFSException {
        return this.mechContext.getSigningKey();
    }

    /**
     * Initialize the GSSContext to provide SPNEGO feature.
     *
     * @param inputBuf
     * @param offset

     */
    byte[] getSessionKey();

    /**
     * Gets the signing key for SMB2/3
     *
     * @return the signing key or null if not available
     */
    byte[] getSigningKey();

    /**
     * Validates authentication credentials
     *
     * @return true if credentials are valid
     */
    boolean validateCredentials();

    /**

     */
    @Override
    public String getNetbiosName() {
        return null;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#getSigningKey()
     */
    @Override
    public byte[] getSigningKey() throws SmbException {
        /*
         * The kerberos session key is not accessible via the JGSS API. IBM and
         * Oracle both implement a similar API to make an ExtendedGSSContext

    /**
     * Gets the signing key for the session.
     * @return the signing key for the session
     * @throws CIFSException if an error occurs retrieving the signing key
     */
    byte[] getSigningKey() throws CIFSException;

    /**
     * Checks whether the security context is established.
     * @return whether the context is established
     */
    boolean isEstablished();

    /**

                                        .treeConnect(null, null);
                            } else {
                                final byte[] signingKey = auth.getSigningKey(transport.server.encryptionKey);
                                request.digest = new SigningDigest(signingKey, false);
                            }
                        }

        return serverChallenge;
    }

    /**
     * Gets the signing key for message authentication.
     * @return the signing key bytes
     */
    public byte[] getSigningKey() {
        return signingKey;
    }

    /**
     * Gets the NetBIOS name of the remote server.
     * @return the NetBIOS name
     */
    public String getNetbiosName() {

                    this.sessionKey = ctx.getSigningKey();
                    if (request != null && request.getDigest() != null) {
                        /* success - install the signing digest */
                        setDigest(request.getDigest());
                    } else if (!anonymous && isSignatureSetupRequired()) {
                        byte[] signingKey = ctx.getSigningKey();

     * @return the server's challenge
     */
    public byte[] getServerChallenge() {
        return this.serverChallenge;
    }

    @Override
    public byte[] getSigningKey() {
        return this.masterKey;
    }

    @Override
    public String getNetbiosName() {
        return this.netbiosName;
    }

    /**

     *
     * @param challenge the server challenge bytes
     * @return the signing key
     * @throws SmbException if an error occurs generating the signing key
     */
    public byte[] getSigningKey(final byte[] challenge) throws SmbException {
        switch (LM_COMPATIBILITY) {
        case 0:
        case 1:
        case 2:
            final byte[] signingKey = new byte[40];

     * @param chlng the server challenge
     * @return the signing key
     * @throws SmbException if an SMB error occurs
     * @throws GeneralSecurityException if a security error occurs
     */
    public byte[] getSigningKey(CIFSContext tc, byte[] chlng) throws SmbException, GeneralSecurityException {
        switch (tc.getConfig().getLanManCompatibility()) {
        case 0:
        case 1:
        case 2: