/*
* 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.crypto.digest;
import java.util.Map;
import java.security.MessageDigest;
/**
* An interface that can be used to augment the behavior of a digest hash.
* One example usecase is with the password based login modules to
* modify the behavior of the hashing to introduce prefix/suffix salts.
*
* @author Scott.Stark@jboss.org
* @version $Revision: 85945 $
*/
public interface DigestCallback
{
/** Pass through access to the login module options. When coming from a
* login module this includes the following keys:
* javax.security.auth.login.name - for the username
* javax.security.auth.login.password - for the String password
*/
public void init(Map options);
/**
* Pre-hash callout to allow for content before the password. Any content
* should be added using the MessageDigest update methods.
* @param digest - the security digest being used for the one-way hash
*/
public void preDigest(MessageDigest digest);
/** Post-hash callout afer the password has been added to allow for content
* after the password has been added. Any content should be added using the
* MessageDigest update methods.
* @param digest - the security digest being used for the one-way hash
*/
public void postDigest(MessageDigest digest);
}