/*******************************************************************************
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 *******************************************************************************/
package at.gv.egovernment.moa.id.util;

import at.gv.egovernment.moa.id.auth.exception.DatabaseEncryptionException;
import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProviderFactory;
import at.gv.egovernment.moa.logging.Logger;

public class SessionEncrytionUtil extends AbstractEncrytionUtil {
	
	private static SessionEncrytionUtil instance = null;	
	private static String key = null;
	
	public static SessionEncrytionUtil getInstance() {
		if (instance == null) {
			try {
				key = AuthConfigurationProviderFactory.getInstance().getMOASessionEncryptionKey();			
				instance =  new SessionEncrytionUtil();
								
			} catch (Exception e) {
				Logger.warn("MOASession encryption can not be inizialized.", e);
				
			}					
		}
		return instance;
	}

	/**
	 * @throws DatabaseEncryptionException
	 */
	private SessionEncrytionUtil() throws DatabaseEncryptionException {
		super();
	}
	
	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.util.AbstractEncrytionUtil#getSalt()
	 */
	@Override
	protected String getSalt() {
		return "Session-Salt";
	}

	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.util.AbstractEncrytionUtil#getKey()
	 */
	@Override
	protected String getKey() {
		return key;
	}
	
}