byte[] token = negoResp.getSecurityBlob();
        final int securityMode = negoResp.getSecurityMode();
        boolean anonymous = this.credentials.isAnonymous();
        final boolean doSigning = securityMode != 0 && !anonymous;
        long newSessId = 0;
        long curSessId = this.sessionId;

        synchronized (trans) {
            this.credentials.refresh();