Add OidcSession interface

docs/src/main/asciidoc/security-openid-connect-multitenancy.adoc

@@ -135,7 +135,7 @@ import io.vertx.ext.web.RoutingContext;
 @ApplicationScoped
 public class CustomTenantResolver implements TenantResolver {
 
-    @Override 
+    @Override
     public String resolve(RoutingContext context) {
         String path = context.request().path();
         String[] parts = path.split("/");
@@ -152,6 +152,45 @@ public class CustomTenantResolver implements TenantResolver {
 
 From the implementation above, tenants are resolved from the request path so that in case no tenant could be inferred, `null` is returned to indicate that the default tenant configuration should be used.
 
+[NOTE]
+===
+When a current tenant represents an OIDC `web-app` application, the current `io.vertx.ext.web.RoutingContext` will contain a `tenant-id` attribute by the time the custom tenant resolver has been called for all the requests completing the code authentication flow and the already authenticated requests, when either a tenant specific state or session cookie already exists.
+Therefore, when working with mulltiple OpenId Connect Providers, you only need a path specific check to resolve a tenant id if the `RoutingContext` does not have the `tenant-id` attribute set, for example:
+
+[source,java]
+----
+package org.acme.quickstart.oidc;
+
+import javax.enterprise.context.ApplicationScoped;
+
+import io.quarkus.oidc.TenantResolver;
+import io.vertx.ext.web.RoutingContext;
+
+@ApplicationScoped
+public class CustomTenantResolver implements TenantResolver {
+
+    @Override
+    public String resolve(RoutingContext context) {
+        String tenantId = context.get("tenant-id");
+        if (tenantId != null) {
+            return tenantId;
+        } else {
+            // Initial login request
+            String path = context.request().path();
+            String[] parts = path.split("/");
+
+            if (parts.length == 0) {
+                // resolve to default tenant configuration
+                return null;
+            }
+            return parts[1];
+        }
+    }
+}
+----
+
+===
+
 [NOTE]
 ===
 If you also use xref:hibernate-orm.adoc#multitenancy[Hibernate ORM multitenancy] and both OIDC and Hibernate ORM tenant IDs are the same and must be extracted from the Vert.x `RoutingContext` then you can pass the tenant id from the OIDC Tenant Resolver to the Hibernate ORM Tenant Resolver as a `RoutingContext` attribute, for example:

docs/src/main/asciidoc/security-openid-connect-web-authentication.adoc

@@ -474,6 +474,34 @@ quarkus.oidc.logout.post-logout-uri-param=returnTo
 quarkus.oidc.logout.extra-params.client_id=${quarkus.oidc.client-id}
 ----
 
+[[local-logout]]
+==== Local Logout
+
+If you work with a social provider such as Google and are concerned that the users can be logged out from all their Google applications with the <<user-initiated-logout,User-Initiated Logout>> which redirects the users to the provider's logout endpoint then you can support a local logout with the help of the <<oidc-session,OidcSession>> which only clears the local session cookie, for example:
+
+[source,java]
+----
+import javax.inject.Inject;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+
+import io.quarkus.oidc.OidcSession;
+
+@Path("/service")
+public class ServiceResource {
+
+    @Inject
+    OidcSession oidcSession;
+
+    @GET
+    @Path("logout")
+    public String logout() {
+        oidcSession.logout().await().indefinitely();
+        return "You are logged out".
+    }
+----
+
+
 [[session-management]]
 === Session Management
 
@@ -495,6 +523,11 @@ You can have this process further optimized by having a simple JavaScript functi
 
 Note this user session can not be extended forever - the returning user with the expired ID token will have to re-authenticate at the OIDC provider endpoint once the refresh token has expired.
 
+[[oidc-session]]
+==== OidcSession
+
+`io.quarkus.oidc.OidcSession` is a wrapper around the current `IdToken`. It can help to perform a <<local-logout, Local Logout>>, retrieve the current session's tenant identifier and check when the session will expire. More useful methods will be added to it over time.
+
 ==== TokenStateManager
 
 OIDC `CodeAuthenticationMechanism` is using the default `io.quarkus.oidc.TokenStateManager` interface implementation to keep the ID, access and refresh tokens returned in the authorization code or refresh grant responses in a session cookie. It makes Quarkus OIDC endpoints completely stateless.

extensions/oidc/deployment/src/main/java/io/quarkus/oidc/deployment/OidcBuildStep.java

@@ -36,6 +36,7 @@
 import io.quarkus.oidc.runtime.OidcIdentityProvider;
 import io.quarkus.oidc.runtime.OidcJsonWebTokenProducer;
 import io.quarkus.oidc.runtime.OidcRecorder;
+import io.quarkus.oidc.runtime.OidcSessionImpl;
 import io.quarkus.oidc.runtime.OidcTokenCredentialProducer;
 import io.quarkus.oidc.runtime.TenantConfigBean;
 import io.quarkus.runtime.TlsConfig;
@@ -87,7 +88,8 @@ public void additionalBeans(BuildProducer<AdditionalBeanBuildItem> additionalBea
                 .addBeanClass(OidcConfigurationMetadataProducer.class)
                 .addBeanClass(OidcIdentityProvider.class)
                 .addBeanClass(DefaultTenantConfigResolver.class)
-                .addBeanClass(DefaultTokenStateManager.class);
+                .addBeanClass(DefaultTokenStateManager.class)
+                .addBeanClass(OidcSessionImpl.class);
         additionalBeans.produce(builder.build());
     }
 

extensions/oidc/runtime/src/main/java/io/quarkus/oidc/OidcSession.java

@@ -0,0 +1,39 @@
+package io.quarkus.oidc;
+
+import java.time.Instant;
+
+import org.eclipse.microprofile.jwt.JsonWebToken;
+
+import io.smallrye.mutiny.Uni;
+
+public interface OidcSession {
+
+    /**
+     * Return the tenant identifier of the current session
+     * 
+     * @return tenant id
+     */
+    String getTenantId();
+
+    /**
+     * Return an {@linkplain:Instant} indicating how long will it take for the current session to expire.
+     * 
+     * @return
+     */
+    Instant expiresIn();
+
+    /**
+     * Perform a local logout without a redirect to the OpenId Connect provider.
+     * 
+     * @return Uni<Void>
+     */
+    Uni<Void> logout();
+
+    /**
+     * Return the ID token the current session depends upon.
+     * 
+     * @return id token
+     */
+    JsonWebToken getIdToken();
+
+}

extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/BearerAuthenticationMechanism.java

@@ -1,7 +1,5 @@
 package io.quarkus.oidc.runtime;
 
-import java.util.function.Function;
-
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import io.quarkus.oidc.AccessTokenCredential;
@@ -21,18 +19,13 @@ public class BearerAuthenticationMechanism extends AbstractOidcAuthenticationMec
             HttpHeaderNames.WWW_AUTHENTICATE, OidcConstants.BEARER_SCHEME);
 
     public Uni<SecurityIdentity> authenticate(RoutingContext context,
-            IdentityProviderManager identityProviderManager) {
-        return resolver.resolveConfig(context).chain(new Function<OidcTenantConfig, Uni<? extends SecurityIdentity>>() {
-            @Override
-            public Uni<? extends SecurityIdentity> apply(OidcTenantConfig oidcTenantConfig) {
-                String token = extractBearerToken(context, oidcTenantConfig);
-                // if a bearer token is provided try to authenticate
-                if (token != null) {
-                    return authenticate(identityProviderManager, context, new AccessTokenCredential(token));
-                }
-                return Uni.createFrom().nullItem();
-            }
-        });
+            IdentityProviderManager identityProviderManager, OidcTenantConfig oidcTenantConfig) {
+        String token = extractBearerToken(context, oidcTenantConfig);
+        // if a bearer token is provided try to authenticate
+        if (token != null) {
+            return authenticate(identityProviderManager, context, new AccessTokenCredential(token));
+        }
+        return Uni.createFrom().nullItem();
     }
 
     public Uni<ChallengeData> getChallenge(RoutingContext context) {