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/*******************************************************************************
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* Modification copyright (C) 2021 Nordix Foundation.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*
*
*******************************************************************************/
package org.onap.dmaap.kafkaauthorize;
import java.util.EnumSet;
import java.util.Map;
import org.apache.kafka.common.acl.AclOperation;
import org.apache.kafka.common.security.auth.KafkaPrincipal;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.onap.dmaap.commonauth.kafka.base.authorization.AuthorizationProviderFactory;
import org.onap.dmaap.commonauth.kafka.base.authorization.Cadi3AAFProvider;
import kafka.network.RequestChannel.Session;
import kafka.security.auth.Acl;
import kafka.security.auth.Authorizer;
import kafka.security.auth.Operation;
import kafka.security.auth.Resource;
import scala.collection.immutable.Set;
/**
* A trivial Kafka Authorizer for use with SSL and AAF
* Authentication/Authorization.
*
*/
public class KafkaCustomAuthorizer implements Authorizer {
private final String[] adminPermission = new String[3];
protected static final EnumSet<AclOperation> TOPIC_DESCRIBE_OPERATIONS = EnumSet.of(AclOperation.DESCRIBE_CONFIGS);
protected static final EnumSet<AclOperation> TOPIC_READ_WRITE_DESCRIBE_OPERATIONS = EnumSet.of(AclOperation.WRITE,
AclOperation.READ, AclOperation.DESCRIBE_CONFIGS);
protected static final EnumSet<AclOperation> TOPIC_ADMIN_OPERATIONS = EnumSet.of(AclOperation.ALTER,
AclOperation.ALTER_CONFIGS, AclOperation.CREATE);
static final String TOPIC = "Topic";
private static final Logger logger = LoggerFactory.getLogger(KafkaCustomAuthorizer.class);
@Override
public void configure(final Map<String, ?> arg0) {
// TODO Auto-generate method stub
}
@Override
public void addAcls(final Set<Acl> arg0, final Resource arg1) {
// TODO Auto-generated method stub
}
private String[] getTopicPermission(String topicName, AclOperation aclOperation) {
String namspace = topicName.substring(0, topicName.lastIndexOf("."));
String[] permission = new String[3];
if (TOPIC_READ_WRITE_DESCRIBE_OPERATIONS.contains(aclOperation)) {
permission[0] = namspace + ".topic";
String instancePart = (System.getenv("pubSubInstPart") != null) ? System.getenv("pubSubInstPart")
: ".topic";
permission[1] = instancePart + topicName;
if (aclOperation.equals(AclOperation.WRITE)) {
permission[2] = "pub";
} else if (aclOperation.equals(AclOperation.READ)) {
permission[2] = "sub";
} else if (TOPIC_DESCRIBE_OPERATIONS.contains(aclOperation)) {
permission[2] = "view";
}
} else if (aclOperation.equals(AclOperation.DELETE)) {
permission = (System.getProperty("msgRtr.topicfactory.aaf") + namspace + "|destroy").split("\\|");
} else if (TOPIC_ADMIN_OPERATIONS.contains(aclOperation)) {
permission = (System.getProperty("msgRtr.topicfactory.aaf") + namspace + "|create").split("\\|");
}
return permission;
}
private String[] getAdminPermission() {
if (adminPermission[0] == null) {
adminPermission[0] = System.getProperty("namespace") + ".kafka.access";
adminPermission[1] = "*";
adminPermission[2] = "*";
}
return adminPermission;
}
private String[] getPermission(AclOperation aclOperation, String resource, String topicName) {
String[] permission = new String[3];
switch (aclOperation) {
case ALTER:
case ALTER_CONFIGS:
case CREATE:
case DELETE:
if (resource.equals(TOPIC)) {
permission = getTopicPermission(topicName, aclOperation);
} else if (resource.equals("Cluster")) {
permission = getAdminPermission();
}
break;
case DESCRIBE_CONFIGS:
case READ:
case WRITE:
if (resource.equals(TOPIC)) {
permission = getTopicPermission(topicName, aclOperation);
}
break;
case IDEMPOTENT_WRITE:
if (resource.equals("Cluster")) {
permission = getAdminPermission();
}
break;
default:
break;
}
return permission;
}
@Override
public boolean authorize(final Session arg0, final Operation arg1, final Resource arg2) {
if (arg0.principal() == null) {
return false;
}
String fullName = arg0.principal().getName();
fullName = fullName != null ? fullName.trim() : fullName;
String topicName = null;
String[] permission;
String resource = arg2.resourceType().name();
if (resource.equals(TOPIC)) {
topicName = arg2.name();
}
if (fullName != null && fullName.equals(Cadi3AAFProvider.getKafkaUsername())) {
return true;
}
if ((!Cadi3AAFProvider.isCadiEnabled())||(null != topicName && !topicName.startsWith("org.onap"))) {
return true;
}
permission = getPermission(arg1.toJava(), resource, topicName);
if (permission[0] != null) {
return !checkPermissions(fullName, topicName, permission);
}
return true;
}
private boolean checkPermissions(String fullName, String topicName, String[] permission) {
try {
if (null != topicName) {
boolean hasResp = AuthorizationProviderFactory.getProviderFactory().getProvider()
.hasPermission(fullName, permission[0], permission[1], permission[2]);
if (hasResp) {
logger.info("Successful Authorization for {} on {} for {} | {} | {}", fullName, topicName,
permission[0], permission[1], permission[2]);
}
if (!hasResp) {
logger.info("{} is not allowed in {} | {} | {}", fullName, permission[0], permission[1],
permission[2]);
return true;
}
}
} catch (final Exception e) {
return true;
}
return false;
}
@Override
public void close() {
// TODO Auto-generated method stub
}
@Override
public scala.collection.immutable.Map<Resource, Set<Acl>> getAcls() {
// TODO Auto-generated method stub
return null;
}
@Override
public scala.collection.immutable.Map<Resource, Set<Acl>> getAcls(final KafkaPrincipal arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean removeAcls(final Resource arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean removeAcls(final Set<Acl> arg0, final Resource arg1) {
// TODO Auto-generated method stub
return false;
}
public Set<Acl> getAcls(Resource arg0) {
// TODO Auto-generated method stub
return null;
}
}
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