* @return a global context, initialized on first call
     */
    public static synchronized final SingletonContext getInstance () {
        if ( INSTANCE == null ) {
            try {
                log.debug("Initializing singleton context");
                init(null);
            }
            catch ( CIFSException e ) {
                log.error("Failed to create singleton JCIFS context", e);
            }
        }

                        }
                        this.sessionKey = signingKey;
                    }
                    else {
                        log.trace("Not yet initializing signing");
                    }

                    response = new SmbComSessionSetupAndXResponse(getContext().getConfig(), null);
                    response.setExtendedSecurity(true);