log.debug("Initial session preauth hash " + Hexdump.toHexString(this.preauthIntegrityHash));
        }

        while (true) {
            Subject s = this.credentials.getSubject();
            if (ctx == null) {
                ctx = createContext(trans, tdomain, negoResp, !anonymous, s);
            }
            token = createToken(ctx, token, s);

            if (token != null) {