| /** |
| * 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.hadoop.mapred; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.hadoop.mapreduce.JobACL; |
| import org.apache.hadoop.security.AccessControlException; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.authorize.AccessControlList; |
| |
| class JobACLsManager { |
| |
| JobConf conf; |
| |
| public JobACLsManager(JobConf conf) { |
| this.conf = conf; |
| } |
| |
| boolean areACLsEnabled() { |
| return conf.getBoolean(JobConf.MR_ACLS_ENABLED, false); |
| } |
| |
| /** |
| * Construct the jobACLs from the configuration so that they can be kept in |
| * the memory. If authorization is disabled on the JT, nothing is constructed |
| * and an empty map is returned. |
| * |
| * @return JobACL to AccessControlList map. |
| */ |
| Map<JobACL, AccessControlList> constructJobACLs(JobConf conf) { |
| |
| Map<JobACL, AccessControlList> acls = |
| new HashMap<JobACL, AccessControlList>(); |
| |
| // Don't construct anything if authorization is disabled. |
| if (!areACLsEnabled()) { |
| return acls; |
| } |
| |
| for (JobACL aclName : JobACL.values()) { |
| String aclConfigName = aclName.getAclName(); |
| String aclConfigured = conf.get(aclConfigName); |
| if (aclConfigured == null) { |
| // If ACLs are not configured at all, we grant no access to anyone. So |
| // jobOwner and cluster administrators _only_ can do 'stuff' |
| aclConfigured = ""; |
| } |
| acls.put(aclName, new AccessControlList(aclConfigured)); |
| } |
| return acls; |
| } |
| |
| /** |
| * If authorization is enabled, checks whether the user (in the callerUGI) |
| * is authorized to perform the operation specified by 'jobOperation' on |
| * the job by checking if the user is jobOwner or part of job ACL for the |
| * specific job operation. |
| * <ul> |
| * <li>The owner of the job can do any operation on the job</li> |
| * <li>For all other users/groups job-acls are checked</li> |
| * </ul> |
| * @param callerUGI |
| * @param jobOperation |
| * @param jobOwner |
| * @param jobACL |
| * @throws AccessControlException |
| */ |
| boolean checkAccess(UserGroupInformation callerUGI, |
| JobACL jobOperation, String jobOwner, AccessControlList jobACL) |
| throws AccessControlException { |
| |
| String user = callerUGI.getShortUserName(); |
| if (!areACLsEnabled()) { |
| return true; |
| } |
| |
| // Allow Job-owner for any operation on the job |
| if (user.equals(jobOwner) |
| || jobACL.isUserAllowed(callerUGI)) { |
| return true; |
| } |
| |
| return false; |
| } |
| } |