final boolean doSigning = securityMode != 0 && !anonymous;
        long newSessId = 0;
        long curSessId = this.sessionId;

        synchronized ( trans ) {
            this.credentials.refresh();
            Subject s = this.credentials.getSubject();
            SSPContext ctx = createContext(trans, tdomain, negoResp, doSigning, s);
            while ( true ) {
                token = createToken(ctx, token, s);