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HADOOP-15255. Upper/Lower case conversion support for group names in LdapGroupsMapping. Contributed by Nanda kumar.

This commit is contained in:
Arpit Agarwal 2018-02-23 15:37:17 -08:00
parent 68ce193efc
commit 033f9c68ea
4 changed files with 206 additions and 1 deletions
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91
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/RuleBasedLdapGroupsMapping.java Normal file
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@ -0,0 +1,91 @@
/**
* 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 com.google.common.annotations.VisibleForTesting;
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.List;
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;
}
}
}

13
hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
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@ -275,6 +275,19 @@
</description>
</property>
<property>
<name>hadoop.security.group.mapping.ldap.conversion.rule</name>
<value>none</value>
<description>
The rule is applied on the group names received from LDAP when
RuleBasedLdapGroupsMapping is configured.
Supported rules are "to_upper", "to_lower" and "none".
to_upper: This will convert all the group names to uppercase.
to_lower: This will convert all the group names to lowercase.
none: This will retain the source formatting, this is default value.
</description>
</property>
<property>
<name>hadoop.security.credential.clear-text-fallback</name>
<value>true</value>

4
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestCommonConfigurationFields.java
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@ -34,6 +34,7 @@
import org.apache.hadoop.security.CompositeGroupsMapping;
import org.apache.hadoop.security.HttpCrossOriginFilterInitializer;
import org.apache.hadoop.security.LdapGroupsMapping;
import org.apache.hadoop.security.RuleBasedLdapGroupsMapping;
import org.apache.hadoop.security.http.CrossOriginFilter;
import org.apache.hadoop.security.ssl.SSLFactory;
@ -74,7 +75,8 @@ public void initializeMemberVariables() {
ZKFailoverController.class,
SSLFactory.class,
CompositeGroupsMapping.class,
CodecUtil.class
CodecUtil.class,
RuleBasedLdapGroupsMapping.class
};
// Initialize used variables

99
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/TestRuleBasedLdapGroupsMapping.java Normal file
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@ -0,0 +1,99 @@
/**
* 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.conf.Configuration;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;
import javax.naming.NamingException;
import java.util.ArrayList;
import java.util.List;
import static org.apache.hadoop.security.RuleBasedLdapGroupsMapping
.CONVERSION_RULE_KEY;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.eq;
/**
* Test cases to verify the rules supported by RuleBasedLdapGroupsMapping.
*/
public class TestRuleBasedLdapGroupsMapping {
@Test
public void testGetGroupsToUpper() throws NamingException {
RuleBasedLdapGroupsMapping groupsMapping = Mockito.spy(
new RuleBasedLdapGroupsMapping());
List<String> groups = new ArrayList<>();
groups.add("group1");
groups.add("group2");
Mockito.doReturn(groups).when((LdapGroupsMapping) groupsMapping)
.doGetGroups(eq("admin"), anyInt());
Configuration conf = new Configuration();
conf.set(LdapGroupsMapping.LDAP_URL_KEY, "ldap://test");
conf.set(CONVERSION_RULE_KEY, "to_upper");
groupsMapping.setConf(conf);
List<String> groupsUpper = new ArrayList<>();
groupsUpper.add("GROUP1");
groupsUpper.add("GROUP2");
Assert.assertEquals(groupsUpper, groupsMapping.getGroups("admin"));
}
@Test
public void testGetGroupsToLower() throws NamingException {
RuleBasedLdapGroupsMapping groupsMapping = Mockito.spy(
new RuleBasedLdapGroupsMapping());
List<String> groups = new ArrayList<>();
groups.add("GROUP1");
groups.add("GROUP2");
Mockito.doReturn(groups).when((LdapGroupsMapping) groupsMapping)
.doGetGroups(eq("admin"), anyInt());
Configuration conf = new Configuration();
conf.set(LdapGroupsMapping.LDAP_URL_KEY, "ldap://test");
conf.set(CONVERSION_RULE_KEY, "to_lower");
groupsMapping.setConf(conf);
List<String> groupsLower = new ArrayList<>();
groupsLower.add("group1");
groupsLower.add("group2");
Assert.assertEquals(groupsLower, groupsMapping.getGroups("admin"));
}
@Test
public void testGetGroupsInvalidRule() throws NamingException {
RuleBasedLdapGroupsMapping groupsMapping = Mockito.spy(
new RuleBasedLdapGroupsMapping());
List<String> groups = new ArrayList<>();
groups.add("group1");
groups.add("GROUP2");
Mockito.doReturn(groups).when((LdapGroupsMapping) groupsMapping)
.doGetGroups(eq("admin"), anyInt());
Configuration conf = new Configuration();
conf.set(LdapGroupsMapping.LDAP_URL_KEY, "ldap://test");
conf.set(CONVERSION_RULE_KEY, "none");
groupsMapping.setConf(conf);
Assert.assertEquals(groups, groupsMapping.getGroups("admin"));
}
}