| /** |
| * 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.security; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.util.StringUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| /** |
| * This class uses {@link LdapGroupsMapping} for group lookup and applies the |
| * rule configured on the group names. |
| */ |
| @InterfaceAudience.LimitedPrivate({"HDFS"}) |
| @InterfaceStability.Evolving |
| public class RuleBasedLdapGroupsMapping extends LdapGroupsMapping { |
| |
| public static final String CONVERSION_RULE_KEY = LDAP_CONFIG_PREFIX + |
| ".conversion.rule"; |
| |
| private static final String CONVERSION_RULE_DEFAULT = "none"; |
| private static final Logger LOG = |
| LoggerFactory.getLogger(RuleBasedLdapGroupsMapping.class); |
| |
| private Rule rule; |
| |
| /** |
| * Supported rules applicable for group name modification. |
| */ |
| private enum Rule { |
| TO_UPPER, TO_LOWER, NONE |
| } |
| |
| @Override |
| public synchronized void setConf(Configuration conf) { |
| super.setConf(conf); |
| String value = conf.get(CONVERSION_RULE_KEY, CONVERSION_RULE_DEFAULT); |
| try { |
| rule = Rule.valueOf(value.toUpperCase()); |
| } catch (IllegalArgumentException iae) { |
| LOG.warn("Invalid {} configured: '{}'. Using default value: '{}'", |
| CONVERSION_RULE_KEY, value, CONVERSION_RULE_DEFAULT); |
| } |
| } |
| |
| /** |
| * Returns list of groups for a user. |
| * This calls {@link LdapGroupsMapping}'s getGroups and applies the |
| * configured rules on group names before returning. |
| * |
| * @param user get groups for this user |
| * @return list of groups for a given user |
| */ |
| @Override |
| public synchronized List<String> getGroups(String user) { |
| List<String> groups = super.getGroups(user); |
| switch (rule) { |
| case TO_UPPER: |
| return groups.stream().map(StringUtils::toUpperCase).collect( |
| Collectors.toList()); |
| case TO_LOWER: |
| return groups.stream().map(StringUtils::toLowerCase).collect( |
| Collectors.toList()); |
| case NONE: |
| default: |
| return groups; |
| } |
| } |
| |
| public synchronized Set<String> getGroupsSet(String user) { |
| Set<String> groups = super.getGroupsSet(user); |
| switch (rule) { |
| case TO_UPPER: |
| return groups.stream().map(StringUtils::toUpperCase).collect( |
| Collectors.toCollection(LinkedHashSet::new)); |
| case TO_LOWER: |
| return groups.stream().map(StringUtils::toLowerCase).collect( |
| Collectors.toCollection(LinkedHashSet::new)); |
| case NONE: |
| default: |
| return groups; |
| } |
| } |
| } |