*
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString () {
        return "Kerb5Authenticatior[subject=" + ( this.getSubject() != null ? this.getSubject().getPrincipals() : null ) + ",user=" + this.user
                + ",realm=" + this.realm + "]";
    }


    private SpnegoContext createContext ( CIFSContext tc, String targetDomain, String host ) throws GSSException {