* @param subject
     *            the subject to set
     */
    protected void setSubject ( Subject subject ) {
        this.subject = subject;
    }


    @Override
    public void refresh () throws CIFSException {
        // custom Kerb5Authenticators need to override this method for support
        throw new SmbUnsupportedOperationException("Refreshing credentials is not supported by this authenticator");
    }