| /* |
| * 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 org.apache.sling.distribution.agent.impl; |
| |
| import javax.annotation.Nonnull; |
| import javax.jcr.RepositoryException; |
| import javax.jcr.Session; |
| import javax.jcr.security.AccessControlManager; |
| import javax.jcr.security.Privilege; |
| |
| import org.apache.jackrabbit.util.Text; |
| import org.apache.sling.api.resource.ResourceResolver; |
| import org.apache.sling.distribution.DistributionRequest; |
| import org.apache.sling.distribution.DistributionRequestType; |
| import org.apache.sling.distribution.common.DistributionException; |
| |
| /** |
| * {@link DistributionRequestAuthorizationStrategy} based on JCR privileges over a certain {@link Session} |
| */ |
| public class PrivilegeDistributionRequestAuthorizationStrategy implements DistributionRequestAuthorizationStrategy { |
| |
| private final String jcrPrivilege; |
| |
| public PrivilegeDistributionRequestAuthorizationStrategy(String jcrPrivilege) { |
| if (jcrPrivilege == null) { |
| throw new IllegalArgumentException("Jcr Privilege is required"); |
| } |
| |
| this.jcrPrivilege = jcrPrivilege; |
| } |
| |
| public void checkPermission(@Nonnull ResourceResolver resourceResolver, @Nonnull DistributionRequest distributionRequest) throws DistributionException { |
| Session session = resourceResolver.adaptTo(Session.class); |
| |
| if (session == null) { |
| throw new DistributionException("cannot obtain a Session"); |
| } |
| |
| try { |
| if (DistributionRequestType.ADD.equals(distributionRequest.getRequestType())) { |
| checkPermissionForAdd(session, distributionRequest.getPaths()); |
| } else if (DistributionRequestType.DELETE.equals(distributionRequest.getRequestType())) { |
| checkPermissionForDelete(session, distributionRequest.getPaths()); |
| } |
| |
| } catch (RepositoryException e) { |
| throw new DistributionException("Not enough privileges"); |
| } |
| |
| } |
| |
| private void checkPermissionForAdd(Session session, String[] paths) |
| throws RepositoryException, DistributionException { |
| AccessControlManager acMgr = session.getAccessControlManager(); |
| |
| Privilege[] privileges = new Privilege[]{acMgr.privilegeFromName(jcrPrivilege), acMgr.privilegeFromName(Privilege.JCR_READ)}; |
| for (String path : paths) { |
| if (!acMgr.hasPrivileges(path, privileges)) { |
| throw new DistributionException("Not enough privileges"); |
| } |
| } |
| |
| } |
| |
| private void checkPermissionForDelete(Session session, String[] paths) |
| throws RepositoryException, DistributionException { |
| AccessControlManager acMgr = session.getAccessControlManager(); |
| |
| Privilege[] privileges = new Privilege[]{acMgr.privilegeFromName(jcrPrivilege), acMgr.privilegeFromName(Privilege.JCR_REMOVE_NODE)}; |
| for (String path : paths) { |
| |
| String closestParentPath = getClosestParent(session, path); |
| |
| if (closestParentPath == null || !acMgr.hasPrivileges(closestParentPath, privileges)) { |
| throw new DistributionException("Not enough privileges"); |
| } |
| } |
| } |
| |
| private String getClosestParent(Session session, String path) throws RepositoryException { |
| do { |
| if (session.nodeExists(path)) { |
| return path; |
| } |
| path = Text.getRelativeParent(path, 1); |
| } |
| while (path != null && path.length() > 0); |
| |
| return null; |
| } |
| |
| |
| } |