    001package org.apache.turbine.modules.actions;
    002
    003/*
    004 * Licensed to the Apache Software Foundation (ASF) under one
    005 * or more contributor license agreements.  See the NOTICE file
    006 * distributed with this work for additional information
    007 * regarding copyright ownership.  The ASF licenses this file
    008 * to you under the Apache License, Version 2.0 (the
    009 * "License"); you may not use this file except in compliance
    010 * with the License.  You may obtain a copy of the License at
    011 *
    012 *   http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing,
    015 * software distributed under the License is distributed on an
    016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    017 * KIND, either express or implied.  See the License for the
    018 * specific language governing permissions and limitations
    019 * under the License.
    020 */
    021
    022import org.apache.commons.logging.Log;
    023import org.apache.commons.logging.LogFactory;
    024import org.apache.fulcrum.security.acl.AccessControlList;
    025import org.apache.fulcrum.security.util.FulcrumSecurityException;
    026import org.apache.turbine.Turbine;
    027import org.apache.turbine.TurbineConstants;
    028import org.apache.turbine.annotation.TurbineService;
    029import org.apache.turbine.modules.Action;
    030import org.apache.turbine.om.security.User;
    031import org.apache.turbine.pipeline.PipelineData;
    032import org.apache.turbine.services.security.SecurityService;
    033import org.apache.turbine.util.RunData;
    034
    035/**
    036 * This action doPerforms an Access Control List and places it into
    037 * the RunData object, so it is easily available to modules.  The ACL
    038 * is also placed into the session.  Modules can null out the ACL to
    039 * force it to be rebuilt based on more information.
    040 *
    041 * <p>
    042 *
    043 * Turbine uses a User-Role-Permission arrangement for access control.
    044 * Users are assigned Roles.  Roles are assigned Permissions.  Turbine
    045 * modules then check the Permission required for an action or
    046 * information with the set of Permissions currently associated with
    047 * the session (which are dependent on the user associated with the
    048 * session.)
    049 *
    050 * <p>
    051 *
    052 * The criteria for assigning Roles/Permissions is application
    053 * dependent, in some cases an application may change a User's Roles
    054 * during the session.  To achieve flexibility, the ACL takes an
    055 * Object parameter, which the application can use to doPerform the
    056 * ACL.
    057 *
    058 * <p>
    059 *
    060 * This action is special in that it should only be executed by the
    061 * Turbine servlet.
    062 *
    063 * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
    064 * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a>
    065 * @author <a href="quintonm@bellsouth.net">Quinton McCombs</a>
    066 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
    067 * @version $Id: AccessController.java 1706239 2015-10-01 13:18:35Z tv $
    068 */
    069public class AccessController
    070        extends Action
    071{
    072
    073    /** Logging */
    074    private static Log log = LogFactory.getLog(AccessController.class);
    075
    076    /** Injected service instance */
    077    @TurbineService
    078    private SecurityService security;
    079
    080    /**
    081     * If there is a user and the user is logged in, doPerform will
    082     * set the RunData ACL.  The list is first sought from the current
    083     * session, otherwise it is loaded through
    084     * <code>TurbineSecurity.getACL()</code> and added to the current
    085     * session.
    086     *
    087     * @param pipelineData Turbine information.
    088     * @exception FulcrumSecurityException problem with the security service.
    089     */
    090    @Override
    091    public void doPerform(PipelineData pipelineData)
    092        throws FulcrumSecurityException
    093    {
    094        RunData data = getRunData(pipelineData);
    095        User user = data.getUser();
    096
    097        if (!security.isAnonymousUser(user)
    098            && user.hasLoggedIn())
    099        {
    100            log.debug("Fetching ACL for " + user.getName());
    101            AccessControlList acl = (AccessControlList)
    102                    data.getSession().getAttribute(
    103                            TurbineConstants.ACL_SESSION_KEY);
    104            if (acl == null)
    105            {
    106                log.debug("No ACL found in Session, building fresh ACL");
    107                acl = security.getACL(user);
    108                data.getSession().setAttribute(
    109                        TurbineConstants.ACL_SESSION_KEY, acl);
    110
    111                log.debug("ACL is " + acl);
    112            }
    113            data.setACL(acl);
    114        }
    115
    116        // Comply with Turbine 4.0 standards
    117        pipelineData.get(Turbine.class).put(AccessControlList.class, data.getACL());
    118    }
    119}