/*
* JBoss, Home of Professional Open Source.
* Copyright 2016 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.
*/
package org.keycloak.authorization;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.keycloak.authorization.model.Policy;
import org.keycloak.authorization.model.ResourceServer;
import org.keycloak.authorization.permission.evaluator.Evaluators;
import org.keycloak.authorization.policy.evaluation.DefaultPolicyEvaluator;
import org.keycloak.authorization.policy.provider.PolicyProvider;
import org.keycloak.authorization.policy.provider.PolicyProviderFactory;
import org.keycloak.authorization.store.PolicyStore;
import org.keycloak.authorization.store.ResourceServerStore;
import org.keycloak.authorization.store.ResourceStore;
import org.keycloak.authorization.store.ScopeStore;
import org.keycloak.authorization.store.StoreFactory;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.RealmModel;
import org.keycloak.models.utils.RepresentationToModel;
import org.keycloak.provider.Provider;
import org.keycloak.representations.idm.authorization.AbstractPolicyRepresentation;
/**
* <p>The main contract here is the creation of {@link org.keycloak.authorization.permission.evaluator.PermissionEvaluator} instances. Usually
* an application has a single {@link AuthorizationProvider} instance and threads servicing client requests obtain {@link org.keycloak.authorization.core.permission.evaluator.PermissionEvaluator}
* from the {@link #evaluators()} method.
*
* <p>The internal state of a {@link AuthorizationProvider} is immutable. This internal state includes all of the metadata
* used during the evaluation of policies.
*
* <p>Once created, {@link org.keycloak.authorization.permission.evaluator.PermissionEvaluator} instances can be obtained from the {@link #evaluators()} method:
*
* <pre>
* List<ResourcePermission> permissionsToEvaluate = getPermissions(); // the permissions to evaluate
* EvaluationContext evaluationContext = createEvaluationContext(); // the context with runtime environment information
* PermissionEvaluator evaluator = authorization.evaluators().from(permissionsToEvaluate, context);
*
* evaluator.evaluate(new Decision() {
*
* public void onDecision(Evaluation evaluation) {
* // do something on grant
* }
*
* });
* </pre>
*
* @author <a href="mailto:psilva@redhat.com">Pedro Igor</a>
*/
public final class AuthorizationProvider implements Provider {
private final DefaultPolicyEvaluator policyEvaluator;
private StoreFactory storeFactory;
private final Map<String, PolicyProviderFactory> policyProviderFactories;
private final KeycloakSession keycloakSession;
private final RealmModel realm;
public AuthorizationProvider(KeycloakSession session, RealmModel realm, StoreFactory storeFactory, Map<String, PolicyProviderFactory> policyProviderFactories) {
this.keycloakSession = session;
this.realm = realm;
this.storeFactory = storeFactory;
this.policyProviderFactories = policyProviderFactories;
this.policyEvaluator = new DefaultPolicyEvaluator(this);
}
/**
* Returns a {@link Evaluators} instance from where {@link org.keycloak.authorization.policy.evaluation.PolicyEvaluator} instances
* can be obtained.
*
* @return a {@link Evaluators} instance
*/
public Evaluators evaluators() {
return new Evaluators(policyEvaluator);
}
/**
* Returns a {@link StoreFactory}.
*
* @return the {@link StoreFactory}
*/
public StoreFactory getStoreFactory() {
return createStoreFactory();
}
private StoreFactory createStoreFactory() {
return new StoreFactory() {
@Override
public ResourceStore getResourceStore() {
return storeFactory.getResourceStore();
}
@Override
public ResourceServerStore getResourceServerStore() {
return storeFactory.getResourceServerStore();
}
@Override
public ScopeStore getScopeStore() {
return storeFactory.getScopeStore();
}
@Override
public PolicyStore getPolicyStore() {
PolicyStore policyStore = storeFactory.getPolicyStore();
return new PolicyStore() {
@Override
public Policy create(AbstractPolicyRepresentation representation, ResourceServer resourceServer) {
return RepresentationToModel.toModel(representation, AuthorizationProvider.this, policyStore.create(representation, resourceServer));
}
@Override
public void delete(String id) {
Policy policy = findById(id, null);
if (policy != null) {
ResourceServer resourceServer = policy.getResourceServer();
findDependentPolicies(policy.getId(), resourceServer.getId()).forEach(dependentPolicy -> {
dependentPolicy.removeAssociatedPolicy(policy);
if (dependentPolicy.getAssociatedPolicies().isEmpty()) {
delete(dependentPolicy.getId());
}
});
policyStore.delete(id);
}
}
@Override
public Policy findById(String id, String resourceServerId) {
return policyStore.findById(id, resourceServerId);
}
@Override
public Policy findByName(String name, String resourceServerId) {
return policyStore.findByName(name, resourceServerId);
}
@Override
public List<Policy> findByResourceServer(String resourceServerId) {
return policyStore.findByResourceServer(resourceServerId);
}
@Override
public List<Policy> findByResourceServer(Map<String, String[]> attributes, String resourceServerId, int firstResult, int maxResult) {
return policyStore.findByResourceServer(attributes, resourceServerId, firstResult, maxResult);
}
@Override
public List<Policy> findByResource(String resourceId, String resourceServerId) {
return policyStore.findByResource(resourceId, resourceServerId);
}
@Override
public List<Policy> findByResourceType(String resourceType, String resourceServerId) {
return policyStore.findByResourceType(resourceType, resourceServerId);
}
@Override
public List<Policy> findByScopeIds(List<String> scopeIds, String resourceServerId) {
return policyStore.findByScopeIds(scopeIds, resourceServerId);
}
@Override
public List<Policy> findByType(String type, String resourceServerId) {
return policyStore.findByType(type, resourceServerId);
}
@Override
public List<Policy> findDependentPolicies(String id, String resourceServerId) {
return policyStore.findDependentPolicies(id, resourceServerId);
}
};
}
@Override
public void close() {
storeFactory.close();
}
};
}
/**
* Returns the registered {@link PolicyProviderFactory}.
*
* @return a {@link List} containing all registered {@link PolicyProviderFactory}
*/
public Collection<PolicyProviderFactory> getProviderFactories() {
return this.policyProviderFactories.values();
}
/**
* Returns a {@link PolicyProviderFactory} given a <code>type</code>.
*
* @param type the type of the policy provider
* @param <F> the expected type of the provider
* @return a {@link PolicyProviderFactory} with the given <code>type</code>
*/
public <F extends PolicyProviderFactory> F getProviderFactory(String type) {
return (F) policyProviderFactories.get(type);
}
/**
* Returns a {@link PolicyProviderFactory} given a <code>type</code>.
*
* @param type the type of the policy provider
* @param <F> the expected type of the provider
* @return a {@link PolicyProvider} with the given <code>type</code>
*/
public <P extends PolicyProvider> P getProvider(String type) {
PolicyProviderFactory policyProviderFactory = policyProviderFactories.get(type);
if (policyProviderFactory == null) {
return null;
}
return (P) policyProviderFactory.create(this);
}
public KeycloakSession getKeycloakSession() {
return this.keycloakSession;
}
public RealmModel getRealm() {
return realm;
}
@Override
public void close() {
}
}