/*
 Nutzerverwaltung - A Generic User Manager
 Copyright (c) 2016  Ulrich Hilger

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.uhilger.um;

/**
 * Klassen, die eine Verschl&uuml;sselungsfunktion f&6uml;r den 
 * UserMgr bereitstellen wollen, m&uuml;ssen diese Schnittstelle 
 * implementieren
 *
 * @author Copyright (c) Ulrich Hilger, http://uhilger.de
 * @author Published under the terms and conditions of the
 * <a href="http://www.gnu.org/licenses/agpl-3.0" target="_blank">GNU Affero
 * General Public License</a>
 *
 * @version 2, December 27, 2016
 */
public interface Digester {
  
  /** Name des MD5-Algorithmus zum Verschl&uuml;sseln */
  public static final String MD5 = "MD5";

  /**
   * Einen Ausdruck verschl&uuml;sseln
   * 
   * @param text  der Ausdruck, der verschl&uuml;sselt werden soll
   * @param algorithm  der Name des Algorithmus, der zum Verschl&uuml;sseln verwendet werden soll
   * @param encoding  das Encoding, in dem der Ausdruck vorliegt
   * @return  der verschl&uuml;sselte Ausdruck
   */
  String digest(String text, String algorithm, String encoding);
}