* @throws RealmException
     */
    protected static PrincipalName convertPrincipal ( KerberosPrincipal principal ) throws RealmException {
        PrincipalName principalName = new PrincipalName(
            principal.getName() + PrincipalName.NAME_REALM_SEPARATOR + principal.getRealm(),
            PrincipalName.KRB_NT_PRINCIPAL);
        return principalName;
    }