private Cipher sealServerHandle;


    /**
     * @param tc
     *            context to use
     * @param auth
     *            credentials
     * @param doSigning
     *            whether signing is requested
     */
    public NtlmContext ( CIFSContext tc, NtlmPasswordAuthenticator auth, boolean doSigning ) {
        this.transportContext = tc;
        this.auth = auth;