/*
* 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.entitlement;
import org.jboss.resteasy.spi.HttpRequest;
import org.keycloak.OAuthErrorException;
import org.keycloak.authorization.AuthorizationProvider;
import org.keycloak.authorization.common.KeycloakEvaluationContext;
import org.keycloak.authorization.common.KeycloakIdentity;
import org.keycloak.authorization.entitlement.representation.EntitlementRequest;
import org.keycloak.authorization.entitlement.representation.EntitlementResponse;
import org.keycloak.authorization.model.Resource;
import org.keycloak.authorization.model.ResourceServer;
import org.keycloak.authorization.permission.ResourcePermission;
import org.keycloak.authorization.policy.evaluation.DecisionResultCollector;
import org.keycloak.authorization.policy.evaluation.Result;
import org.keycloak.authorization.store.StoreFactory;
import org.keycloak.authorization.util.Permissions;
import org.keycloak.authorization.util.Tokens;
import org.keycloak.jose.jws.JWSInput;
import org.keycloak.jose.jws.JWSInputException;
import org.keycloak.models.ClientModel;
import org.keycloak.models.KeycloakContext;
import org.keycloak.models.RealmModel;
import org.keycloak.protocol.oidc.TokenManager;
import org.keycloak.representations.AccessToken;
import org.keycloak.representations.authorization.Permission;
import org.keycloak.services.ErrorResponseException;
import org.keycloak.services.resources.Cors;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.OPTIONS;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.Suspended;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* @author <a href="mailto:psilva@redhat.com">Pedro Igor</a>
*/
public class EntitlementService {
private final AuthorizationProvider authorization;
@Context
private HttpRequest request;
public EntitlementService(AuthorizationProvider authorization) {
this.authorization = authorization;
}
@Path("{resource_server_id}")
@OPTIONS
public Response authorizePreFlight(@PathParam("resource_server_id") String resourceServerId) {
return Cors.add(this.request, Response.ok()).auth().preflight().build();
}
@Path("{resource_server_id}")
@GET()
@Produces("application/json")
@Consumes("application/json")
public void getAll(@PathParam("resource_server_id") String resourceServerId, @Suspended AsyncResponse asyncResponse) {
KeycloakIdentity identity = new KeycloakIdentity(this.authorization.getKeycloakSession());
if (resourceServerId == null) {
throw new ErrorResponseException(OAuthErrorException.INVALID_REQUEST, "Requires resource_server_id request parameter.", Status.BAD_REQUEST);
}
RealmModel realm = this.authorization.getKeycloakSession().getContext().getRealm();
ClientModel client = realm.getClientByClientId(resourceServerId);
if (client == null) {
throw new ErrorResponseException(OAuthErrorException.INVALID_REQUEST, "Identifier is not associated with any client and resource server.", Status.BAD_REQUEST);
}
StoreFactory storeFactory = authorization.getStoreFactory();
ResourceServer resourceServer = storeFactory.getResourceServerStore().findByClient(client.getId());
authorization.evaluators().from(Permissions.all(resourceServer, identity, authorization), new KeycloakEvaluationContext(this.authorization.getKeycloakSession())).evaluate(new DecisionResultCollector() {
@Override
public void onError(Throwable cause) {
asyncResponse.resume(cause);
}
@Override
protected void onComplete(List<Result> results) {
List<Permission> entitlements = Permissions.allPermits(results);
if (entitlements.isEmpty()) {
asyncResponse.resume(Cors.add(request, Response.status(Status.FORBIDDEN)
.entity(new ErrorResponseException("not_authorized", "Authorization denied.", Status.FORBIDDEN)))
.allowedOrigins(identity.getAccessToken())
.exposedHeaders(Cors.ACCESS_CONTROL_ALLOW_METHODS).build());
} else {
asyncResponse.resume(Cors.add(request, Response.ok().entity(new EntitlementResponse(createRequestingPartyToken(entitlements)))).allowedOrigins(identity.getAccessToken()).allowedMethods("GET").exposedHeaders(Cors.ACCESS_CONTROL_ALLOW_METHODS).build());
}
}
});
}
@Path("{resource_server_id}")
@POST
@Consumes("application/json")
@Produces("application/json")
public void get(@PathParam("resource_server_id") String resourceServerId, EntitlementRequest entitlementRequest, @Suspended AsyncResponse asyncResponse) {
KeycloakIdentity identity = new KeycloakIdentity(this.authorization.getKeycloakSession());
if (entitlementRequest == null) {
throw new ErrorResponseException(OAuthErrorException.INVALID_REQUEST, "Invalid entitlement request.", Status.BAD_REQUEST);
}
if (resourceServerId == null) {
throw new ErrorResponseException(OAuthErrorException.INVALID_REQUEST, "Invalid resource_server_id.", Status.BAD_REQUEST);
}
RealmModel realm = this.authorization.getKeycloakSession().getContext().getRealm();
ClientModel client = realm.getClientByClientId(resourceServerId);
if (client == null) {
throw new ErrorResponseException(OAuthErrorException.INVALID_REQUEST, "Identifier is not associated with any resource server.", Status.BAD_REQUEST);
}
StoreFactory storeFactory = authorization.getStoreFactory();
ResourceServer resourceServer = storeFactory.getResourceServerStore().findByClient(client.getId());
authorization.evaluators().from(createPermissions(entitlementRequest, resourceServer, authorization), new KeycloakEvaluationContext(this.authorization.getKeycloakSession())).evaluate(new DecisionResultCollector() {
@Override
public void onError(Throwable cause) {
asyncResponse.resume(cause);
}
@Override
protected void onComplete(List<Result> results) {
List<Permission> entitlements = Permissions.allPermits(results);
if (entitlements.isEmpty()) {
asyncResponse.resume(new ErrorResponseException("not_authorized", "Authorization denied.", Status.FORBIDDEN));
} else {
asyncResponse.resume(Cors.add(request, Response.ok().entity(new EntitlementResponse(createRequestingPartyToken(entitlements)))).allowedOrigins(identity.getAccessToken()).allowedMethods("GET").exposedHeaders(Cors.ACCESS_CONTROL_ALLOW_METHODS).build());
}
}
});
}
private String createRequestingPartyToken(List<Permission> permissions) {
AccessToken accessToken = Tokens.getAccessToken(this.authorization.getKeycloakSession());
RealmModel realm = this.authorization.getKeycloakSession().getContext().getRealm();
AccessToken.Authorization authorization = new AccessToken.Authorization();
authorization.setPermissions(permissions);
accessToken.setAuthorization(authorization);
;
return new TokenManager().encodeToken(realm, accessToken);
}
private List<ResourcePermission> createPermissions(EntitlementRequest entitlementRequest, ResourceServer resourceServer, AuthorizationProvider authorization) {
StoreFactory storeFactory = authorization.getStoreFactory();
Map<String, Set<String>> permissionsToEvaluate = new HashMap<>();
entitlementRequest.getPermissions().forEach(requestedResource -> {
Resource resource;
if (requestedResource.getResourceSetId() != null) {
resource = storeFactory.getResourceStore().findById(requestedResource.getResourceSetId());
} else {
resource = storeFactory.getResourceStore().findByName(requestedResource.getResourceSetName(), resourceServer.getId());
}
if (resource == null) {
throw new ErrorResponseException("invalid_resource", "Resource with id [" + requestedResource.getResourceSetId() + "] or name [" + requestedResource.getResourceSetName() + "] does not exist.", Status.FORBIDDEN);
}
permissionsToEvaluate.put(resource.getId(), requestedResource.getScopes());
});
String rpt = entitlementRequest.getRpt();
if (rpt != null && !"".equals(rpt)) {
KeycloakContext context = authorization.getKeycloakSession().getContext();
if (!Tokens.verifySignature(rpt, context.getRealm().getPublicKey())) {
throw new ErrorResponseException("invalid_rpt", "RPT signature is invalid", Status.FORBIDDEN);
}
AccessToken requestingPartyToken;
try {
requestingPartyToken = new JWSInput(rpt).readJsonContent(AccessToken.class);
} catch (JWSInputException e) {
throw new ErrorResponseException("invalid_rpt", "Invalid RPT", Status.FORBIDDEN);
}
if (requestingPartyToken.isActive()) {
AccessToken.Authorization authorizationData = requestingPartyToken.getAuthorization();
if (authorizationData != null) {
authorizationData.getPermissions().forEach(permission -> {
Resource resourcePermission = storeFactory.getResourceStore().findById(permission.getResourceSetId());
if (resourcePermission != null) {
Set<String> scopes = permissionsToEvaluate.get(resourcePermission.getId());
if (scopes == null) {
scopes = new HashSet<>();
permissionsToEvaluate.put(resourcePermission.getId(), scopes);
}
scopes.addAll(permission.getScopes());
}
});
}
}
}
return permissionsToEvaluate.entrySet().stream()
.flatMap((Function<Map.Entry<String, Set<String>>, Stream<ResourcePermission>>) entry -> {
Resource entryResource = storeFactory.getResourceStore().findById(entry.getKey());
if (entry.getValue().isEmpty()) {
return Arrays.asList(new ResourcePermission(entryResource, Collections.emptyList(), entryResource.getResourceServer())).stream();
} else {
return entry.getValue().stream()
.map(scopeName -> storeFactory.getScopeStore().findByName(scopeName, entryResource.getResourceServer().getId()))
.filter(scope -> scope != null)
.map(scope -> new ResourcePermission(entryResource, Arrays.asList(scope), entryResource.getResourceServer()));
}
}).collect(Collectors.toList());
}
}