/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited

  *

  * Licensed 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 org.acegisecurity.ui.x509;

 import java.io.IOException;

 import javax.servlet.ServletException;

 import javax.servlet.ServletRequest;

 import javax.servlet.ServletResponse;

 import javax.servlet.http.HttpServletResponse;

 import org.acegisecurity.AuthenticationException;

 import org.acegisecurity.ui.AuthenticationEntryPoint;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 /**

  * In the X.509 authentication case (unlike CAS, for example) the certificate

  * will already have been extracted from the request and a secure context

  * established by the time the security-enforcement filter is invoked.

  * <p>

  * Therefore this class isn't actually responsible for the commencement of

  * authentication, as it is in the case of other providers. It will be called if

  * the certificate was rejected by Acegi's X509AuthenticationProvider, resulting

  * in a null authentication.

  * </p>

  * The <code>commence</code> method will always return an

  * <code>HttpServletResponse.SC_FORBIDDEN</code> (403 error).

  * 

  * @author Luke Taylor

  * @version $Id: X509ProcessingFilterEntryPoint.java 1496 2006-05-23 13:38:33Z

  * benalex $

  * 

  * @see org.acegisecurity.ui.ExceptionTranslationFilter

  */

 public class X509ProcessingFilterEntryPoint implements AuthenticationEntryPoint {

         // ~ Static fields/initializers

         // =====================================================================================

         private static final Log logger = LogFactory.getLog(X509ProcessingFilterEntryPoint.class);

         // ~ Methods

         // ========================================================================================================

         /**

          * Returns a 403 error code to the client.

          * 

          * @param request DOCUMENT ME!

          * @param response DOCUMENT ME!

          * @param authException DOCUMENT ME!

          * 

          * @throws IOException DOCUMENT ME!

          * @throws ServletException DOCUMENT ME!

          */

         public void commence(ServletRequest request, ServletResponse response, AuthenticationException authException)

                         throws IOException, ServletException {

                 if (logger.isDebugEnabled()) {

                         logger.debug("X509 entry point called. Rejecting access");

                 }

                 HttpServletResponse httpResponse = (HttpServletResponse) response;

                 httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN, "Access Denied");

         }

 }