return this.delegate.isUseSMB2OnlyNegotiation();
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.Configuration#isRequireSecureNegotiate()
     */
    @Override
    public boolean isRequireSecureNegotiate () {
        return this.delegate.isRequireSecureNegotiate();
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.Configuration#isSendNTLMTargetName()
     */

        // make sure that validation is performed in any case
        Smb2SigningDigest dgst = getDigest();
        if ( dgst != null && !isAsync() && ( getConfig().isRequireSecureNegotiate() || getErrorCode() == NtStatus.NT_STATUS_OK ) ) {
            // TODO: SMB2 - do we need to check the MIDs?
            // We only read what we were waiting for, so first guess would be no.

    }


    @Override
    public boolean isUseSMB2OnlyNegotiation () {
        return this.smb2OnlyNegotiation;
    }


    @Override
    public boolean isRequireSecureNegotiate () {
        return this.requireSecureNegotiate;
    }


    @Override
    public boolean isPort139FailoverEnabled () {
        return this.port139FailoverEnabled;
    }

     * 
     * It will also break connections with SMB2 servers that do not properly sign error responses.
     * 
     * @return whether to enforce the use of secure negotiation.
     */
    boolean isRequireSecureNegotiate ();


    /**
     * Enable port 139 failover
     * 
     * Property <tt>jcifs.smb.client.port139.enabled</tt> (boolean, default false)
     * 

     * 
     */
    private void validateNegotiation ( SmbTransportImpl trans, SmbSessionImpl sess ) throws CIFSException {
        if ( !trans.isSMB2() || trans.getDigest() == null || !sess.getConfig().isRequireSecureNegotiate() ) {
            log.debug("Secure negotiation does not apply");
            return;
        }

        Smb2NegotiateResponse nego = (Smb2NegotiateResponse) trans.getNegotiateResponse();