/*
JSPWiki - a JSP-based WikiWiki clone.
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*/
package com.ecyrd.jspwiki.auth.login;
import java.io.IOException;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.log4j.Logger;
import com.ecyrd.jspwiki.auth.WikiPrincipal;
/**
* <p>
* Logs in a user based solely on IP address; no other authentication is
* performed. Barring a mis-configuration or I/O error, this LoginModule
* <em>always</em> succeeds.
* </p>
* This module must be used with a CallbackHandler (such as
* {@link WebContainerCallbackHandler}) that supports the following Callback
* types:
* </p>
* <ol>
* <li>{@link HttpRequestCallback}- supplies the IP address, which is used as
* a backup in case no name is supplied.</li>
* </ol>
* <p>
* After authentication, a generic WikiPrincipal based on the IP address will be
* created and associated with the Subject.
* @see javax.security.auth.spi.LoginModule#commit()
* </p>
* @author Andrew Jaquith
* @since 2.3
*/
public class AnonymousLoginModule extends AbstractLoginModule
{
/**
* Bogus prompt sent to the callback handler.
*/
public static final String PROMPT = "User name";
protected static final Logger log = Logger.getLogger( AnonymousLoginModule.class );
/**
* Logs in the user by calling back to the registered CallbackHandler with an
* HttpRequestCallback. The CallbackHandler must supply the current servlet
* HTTP request as its response.
* @return the result of the login; this will always be <code>true</code>.
* @see javax.security.auth.spi.LoginModule#login()
* @throws {@inheritDoc}
*/
public boolean login() throws LoginException
{
// Let's go and make a Principal based on the IP address
HttpRequestCallback hcb = new HttpRequestCallback();
Callback[] callbacks = new Callback[]
{ hcb };
try
{
m_handler.handle( callbacks );
HttpServletRequest request = hcb.getRequest();
WikiPrincipal ipAddr = new WikiPrincipal( request.getRemoteAddr() );
if ( log.isDebugEnabled() )
{
HttpSession session = request.getSession( false );
String sid = (session == null) ? NULL : session.getId();
log.debug("Logged in session ID=" + sid + "; IP=" + ipAddr);
}
// If login succeeds, commit these principals/roles
m_principals.add( ipAddr );
return true;
}
catch( IOException e )
{
log.error("IOException: " + e.getMessage());
return false;
}
catch( UnsupportedCallbackException e )
{
String message = "Unable to handle callback, disallowing login.";
log.error( message, e );
throw new LoginException( message );
}
}
}