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 /*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt 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;
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(s):
Scott.Stark@jboss.org
Version:
$Revision: 2 $
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<String,Objectoptions);
   
Pre-hash callout to allow for content before the password. Any content should be added using the MessageDigest update methods.

Parameters:
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.

Parameters:
digest - the security digest being used for the one-way hash
   public void postDigest(MessageDigest digest);
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