/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.security.integration.password;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
/**
* Utility to generate symmetric key
* @author Anil.Saldhana@redhat.com
* @since Feb 4, 2009
*/
public class EncryptionKeyUtil
{
/**
* Generate a secret key useful for encryption/decryption
* @param encAlgo
* @param keySize Length of the key (if 0, defaults to 128 bits)
* @return
* @throws Exception
*/
public static SecretKey getSecretKey(String encAlgo, int keySize) throws Exception
{
KeyGenerator keyGenerator = KeyGenerator.getInstance(encAlgo);
if(keySize == 0)
keySize = 128;
keyGenerator.init(keySize);
return keyGenerator.generateKey();
}
}