OpenID Connect (OIDC) と Keycloak を使用して認証を一元化する

package org.acme.security.keycloak.authorization;

import jakarta.inject.Inject;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;

import org.jboss.resteasy.reactive.NoCache;

import io.quarkus.security.identity.SecurityIdentity;

@Path("/api/users")
public class UsersResource {

    @Inject
    SecurityIdentity identity;

    @GET
    @Path("/me")
    @NoCache
    public User me() {
        return new User(identity);
    }

    public static class User {

        private final String userName;

        User(SecurityIdentity identity) {
            this.userName = identity.getPrincipal().getName();
        }

        public String getUserName() {
            return userName;
        }
    }
}

package org.acme.security.keycloak.authorization;

import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;

import io.quarkus.security.Authenticated;

@Path("/api/admin")
@Authenticated
public class AdminResource {

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String admin() {
        return "granted";
    }
}

# OIDC Configuration
%prod.quarkus.oidc.auth-server-url=https://localhost:8543/realms/quarkus (1)
quarkus.oidc.client-id=backend-service (2)
quarkus.oidc.credentials.secret=secret (3)
quarkus.oidc.tls.verification=none (4)

# Enable Policy Enforcement
quarkus.keycloak.policy-enforcer.enable=true (5)

# Import the realm file with Dev Services for Keycloak
# Note: This property is effective only in dev mode, not in JVM or native modes
quarkus.keycloak.devservices.realm-path=quarkus-realm.json (6)

docker run --name keycloak \
  -e KC_BOOTSTRAP_ADMIN_USERNAME=admin \
  -e KC_BOOTSTRAP_ADMIN_PASSWORD=admin \
  -p 8543:8443 \
  -v "$(pwd)"/config/keycloak-keystore.jks:/etc/keycloak-keystore.jks \
  quay.io/keycloak/keycloak:{keycloak.version} \ (1)
  start --hostname-strict=false --https-key-store-file=/etc/keycloak-keystore.jks (2)

# Alias the policies archive
quarkus.keycloak.devservices.resource-aliases.policies=/policies.jar (1)
# Map the policies archive to a specific location in the container
quarkus.keycloak.devservices.resource-mappings.policies=/opt/keycloak/providers/policies.jar (2)

java -jar target/quarkus-app/quarkus-run.jar

./target/security-keycloak-authorization-quickstart-runner

export access_token=$(\
    curl --insecure -X POST https://localhost:8543/realms/quarkus/protocol/openid-connect/token \
    --user backend-service:secret \
    -H 'content-type: application/x-www-form-urlencoded' \
    -d 'username=alice&password=alice&grant_type=password' | jq --raw-output '.access_token' \
 )

curl -v -X GET \
  http://localhost:8080/api/users/me \
  -H "Authorization: Bearer "$access_token

curl -v -X GET \
  http://localhost:8080/api/admin \
  -H "Authorization: Bearer "$access_token

export access_token=$(\
    curl --insecure -X POST https://localhost:8543/realms/quarkus/protocol/openid-connect/token \
    --user backend-service:secret \
    -H 'content-type: application/x-www-form-urlencoded' \
    -d 'username=admin&password=admin&grant_type=password' | jq --raw-output '.access_token' \
 )

public class ProtectedResource {
    @Inject
    AuthzClient authzClient;
}

quarkus.keycloak.policy-enforcer.lazy-load-paths=false

quarkus.keycloak.policy-enforcer.paths.1.paths=/api/public
quarkus.keycloak.policy-enforcer.paths.1.enforcement-mode=DISABLED

quarkus.keycloak.policy-enforcer.paths.1.paths=/api/public-enforcing
quarkus.keycloak.policy-enforcer.paths.1.enforcement-mode=ENFORCING

# path policy with enforced scope 'read' for method 'GET'
quarkus.keycloak.policy-enforcer.paths.1.name=Scope Permission Resource
quarkus.keycloak.policy-enforcer.paths.1.paths=/api/protected/standard-way
quarkus.keycloak.policy-enforcer.paths.1.methods.get.method=GET
quarkus.keycloak.policy-enforcer.paths.1.methods.get.scopes=read (1)

# path policies without scope
quarkus.keycloak.policy-enforcer.paths.2.name=Scope Permission Resource
quarkus.keycloak.policy-enforcer.paths.2.paths=/api/protected/programmatic-way,/api/protected/annotation-way

import java.security.BasicPermission;
import java.util.List;

import jakarta.inject.Inject;
import jakarta.ws.rs.ForbiddenException;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;

import org.keycloak.representations.idm.authorization.Permission;

import io.quarkus.security.PermissionsAllowed;
import io.quarkus.security.identity.SecurityIdentity;
import io.smallrye.mutiny.Uni;

@Path("/api/protected")
public class ProtectedResource {

    @Inject
    SecurityIdentity identity;

    @GET
    @Path("/standard-way")
    public Uni<List<Permission>> standardWay() { (1)
        return Uni.createFrom().item(identity.<List<Permission>> getAttribute("permissions"));
    }

    @GET
    @Path("/programmatic-way")
    public Uni<List<Permission>> programmaticWay() {
        var requiredPermission = new BasicPermission("Scope Permission Resource") {
            @Override
            public String getActions() {
                return "read";
            }
        };
        return identity.checkPermission(requiredPermission).onItem() (2)
                .transform(granted -> {
                    if (granted) {
                        return identity.getAttribute("permissions");
                    }
                    throw new ForbiddenException();
                });
    }

    @PermissionsAllowed("Scope Permission Resource:read") (3)
    @GET
    @Path("/annotation-way")
    public Uni<List<Permission>> annotationWay() {
        return Uni.createFrom().item(identity.<List<Permission>> getAttribute("permissions"));
    }
}

quarkus.keycloak.policy-enforcer.enable=true

# Default Tenant
quarkus.oidc.auth-server-url=${keycloak.url:replaced-by-test-resource}/realms/quarkus
quarkus.oidc.client-id=quarkus-app
quarkus.oidc.credentials.secret=secret

quarkus.keycloak.policy-enforcer.enforcement-mode=PERMISSIVE
quarkus.keycloak.policy-enforcer.paths.1.name=Permission Resource
quarkus.keycloak.policy-enforcer.paths.1.paths=/api/permission
quarkus.keycloak.policy-enforcer.paths.1.claim-information-point.claims.static-claim=static-claim

# Service Tenant

quarkus.oidc.service-tenant.auth-server-url=${keycloak.url:replaced-by-test-resource}/realms/quarkus
quarkus.oidc.service-tenant.client-id=quarkus-app
quarkus.oidc.service-tenant.credentials.secret=secret

quarkus.keycloak.service-tenant.policy-enforcer.enforcement-mode=PERMISSIVE
quarkus.keycloak.service-tenant.policy-enforcer.paths.1.name=Permission Resource Service
quarkus.keycloak.service-tenant.policy-enforcer.paths.1.paths=/api/permission
quarkus.keycloak.service-tenant.policy-enforcer.paths.1.claim-information-point.claims.static-claim=static-claim


# WebApp Tenant

quarkus.oidc.webapp-tenant.auth-server-url=${keycloak.url:replaced-by-test-resource}/realms/quarkus
quarkus.oidc.webapp-tenant.client-id=quarkus-app
quarkus.oidc.webapp-tenant.credentials.secret=secret
quarkus.oidc.webapp-tenant.application-type=web-app
quarkus.oidc.webapp-tenant.roles.source=accesstoken

quarkus.keycloak.webapp-tenant.policy-enforcer.enforcement-mode=PERMISSIVE
quarkus.keycloak.webapp-tenant.policy-enforcer.paths.1.name=Permission Resource WebApp
quarkus.keycloak.webapp-tenant.policy-enforcer.paths.1.paths=/api/permission
quarkus.keycloak.webapp-tenant.policy-enforcer.paths.1.claim-information-point.claims.static-claim=static-claim

package org.acme.security.keycloak.authorization;

import java.util.Map;

import jakarta.enterprise.context.ApplicationScoped;

import io.quarkus.keycloak.pep.TenantPolicyConfigResolver;
import io.quarkus.keycloak.pep.runtime.KeycloakPolicyEnforcerConfig;
import io.quarkus.keycloak.pep.runtime.KeycloakPolicyEnforcerTenantConfig;
import io.quarkus.oidc.OidcRequestContext;
import io.quarkus.oidc.OidcTenantConfig;
import io.smallrye.mutiny.Uni;
import io.vertx.ext.web.RoutingContext;

@ApplicationScoped
public class CustomTenantPolicyConfigResolver implements TenantPolicyConfigResolver {

    private final KeycloakPolicyEnforcerTenantConfig enhancedTenantConfig;
    private final KeycloakPolicyEnforcerTenantConfig newTenantConfig;

    public CustomTenantPolicyConfigResolver(KeycloakPolicyEnforcerConfig enforcerConfig) {
        this.enhancedTenantConfig = KeycloakPolicyEnforcerTenantConfig.builder(config) (1)
            .paths("/enhanced-config")
            .permissionName("Permission Name")
            .get("read-scope")
            .build();
        this.newTenantConfig = KeycloakPolicyEnforcerTenantConfig.builder() (2)
            .paths("/new-config")
            .claimInformationPoint(Map.of("claims", Map.of("grant", "{request.parameter['grant']}")))
            .build();
    }

    @Override
    public Uni<KeycloakPolicyEnforcerTenantConfig> resolve(RoutingContext routingContext, OidcTenantConfig tenantConfig,
                                                OidcRequestContext<KeycloakPolicyEnforcerTenantConfig> requestContext) {
        String path = routingContext.normalizedPath();
        String tenantId = tenantConfig.tenantId.orElse(null);
        if ("enhanced-config-tenant".equals(tenantId) && path.equals("/enhanced-config")) {
            return Uni.createFrom().item(enhancedTenantConfig);
        } else if ("new-config-tenant".equals(tenantId) && path.equals("/new-config")) {
            return Uni.createFrom().item(newTenantConfig);
        }
        return Uni.createFrom().nullItem(); (3)
    }
}