// have preauth integrity instead
            log.debug("Secure negotiation does not apply, is SMB3.1");
            return;
        }
        Smb2NegotiateRequest negoReq = new Smb2NegotiateRequest(sess.getConfig(), trans.getRequestSecurityMode(nego));

        log.debug("Sending VALIDATE_NEGOTIATE_INFO");

        int size = 0;

        int securityMode = getRequestSecurityMode(first);

        // further negotiation needed
        Smb2NegotiateRequest smb2neg = new Smb2NegotiateRequest(getContext().getConfig(), securityMode);
        Smb2NegotiateResponse r = null;
        byte[] negoReqBuffer = null;
        byte[] negoRespBuffer = null;
        try {