/*
* 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.nifi.authorization.resource;
import org.apache.nifi.authorization.AccessDeniedException;
import org.apache.nifi.authorization.AuthorizationResult;
import org.apache.nifi.authorization.AuthorizationResult.Result;
import org.apache.nifi.authorization.Authorizer;
import org.apache.nifi.authorization.RequestAction;
import org.apache.nifi.authorization.Resource;
import org.apache.nifi.authorization.user.NiFiUser;
import java.util.Map;
/**
* Authorizable for policies of an Authorizable.
*/
public class AccessPolicyAuthorizable implements Authorizable, EnforcePolicyPermissionsThroughBaseResource {
private static final Authorizable POLICIES_AUTHORIZABLE = new Authorizable() {
@Override
public Authorizable getParentAuthorizable() {
return null;
}
@Override
public Resource getResource() {
return ResourceFactory.getPoliciesResource();
}
};
final Authorizable authorizable;
public AccessPolicyAuthorizable(Authorizable authorizable) {
this.authorizable = authorizable;
}
@Override
public Authorizable getBaseAuthorizable() {
return authorizable;
}
@Override
public Authorizable getParentAuthorizable() {
final Authorizable effectiveAuthorizable = getEffectiveAuthorizable();
if (effectiveAuthorizable.getParentAuthorizable() == null) {
return POLICIES_AUTHORIZABLE;
} else {
return new AccessPolicyAuthorizable(effectiveAuthorizable.getParentAuthorizable());
}
}
@Override
public Resource getResource() {
return ResourceFactory.getPolicyResource(getEffectiveAuthorizable().getResource());
}
private Authorizable getEffectiveAuthorizable() {
// possibly consider the base resource if the authorizable uses it to enforce policy permissions
if (authorizable instanceof EnforcePolicyPermissionsThroughBaseResource) {
final Authorizable baseAuthorizable = ((EnforcePolicyPermissionsThroughBaseResource) authorizable).getBaseAuthorizable();
// if the base authorizable is for a policy, we don't want to use the base otherwise it would keep unwinding and would eventually
// evaluate to the policy of the component and not the policy of the policies for the component
if (baseAuthorizable instanceof AccessPolicyAuthorizable) {
return authorizable;
} else {
return baseAuthorizable;
}
} else {
return authorizable;
}
}
@Override
public AuthorizationResult checkAuthorization(Authorizer authorizer, RequestAction action, NiFiUser user, Map<String, String> resourceContext) {
if (user == null) {
throw new AccessDeniedException("Unknown user.");
}
final AuthorizationResult resourceResult = Authorizable.super.checkAuthorization(authorizer, action, user, resourceContext);
// if we're denied from the resource try inheriting
if (Result.Denied.equals(resourceResult.getResult())) {
return getParentAuthorizable().checkAuthorization(authorizer, action, user, resourceContext);
} else {
return resourceResult;
}
}
@Override
public void authorize(Authorizer authorizer, RequestAction action, NiFiUser user, Map<String, String> resourceContext) throws AccessDeniedException {
if (user == null) {
throw new AccessDeniedException("Unknown user.");
}
try {
Authorizable.super.authorize(authorizer, action, user, resourceContext);
} catch (final AccessDeniedException resourceDenied) {
// if we're denied from the resource try inheriting
try {
getParentAuthorizable().authorize(authorizer, action, user, resourceContext);
} catch (final AccessDeniedException policiesDenied) {
throw resourceDenied;
}
}
}
}