From 8560e4a392962f6b1bdd40f444f091f6a36cdbd4 Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Fri, 24 Nov 2023 15:24:58 +0000
Subject: [PATCH] CASLoginProtocol: close Response resource in backchannelLogout

---
 src/main/java/org/keycloak/protocol/cas/endpoints/LogoutEndpoint.java |   42 ++++++++++++++++++------------------------
 1 files changed, 18 insertions(+), 24 deletions(-)

diff --git a/src/main/java/org/keycloak/protocol/cas/endpoints/LogoutEndpoint.java b/src/main/java/org/keycloak/protocol/cas/endpoints/LogoutEndpoint.java
index 7bafe92..6216ec3 100644
--- a/src/main/java/org/keycloak/protocol/cas/endpoints/LogoutEndpoint.java
+++ b/src/main/java/org/keycloak/protocol/cas/endpoints/LogoutEndpoint.java
@@ -1,10 +1,10 @@
 package org.keycloak.protocol.cas.endpoints;
 
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.QueryParam;
+import jakarta.ws.rs.core.Response;
 import org.jboss.logging.Logger;
 import org.jboss.resteasy.annotations.cache.NoCache;
-import org.jboss.resteasy.spi.HttpRequest;
-import org.keycloak.common.ClientConnection;
-import org.keycloak.events.EventBuilder;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.models.RealmModel;
@@ -15,35 +15,20 @@
 import org.keycloak.services.managers.AuthenticationManager;
 import org.keycloak.services.messages.Messages;
 
-import javax.ws.rs.GET;
-import javax.ws.rs.QueryParam;
-import javax.ws.rs.core.Context;
-import javax.ws.rs.core.HttpHeaders;
-import javax.ws.rs.core.Response;
+import java.net.URI;
 
 public class LogoutEndpoint {
     private static final Logger logger = Logger.getLogger(LogoutEndpoint.class);
 
-    @Context
     private KeycloakSession session;
 
-    @Context
-    private ClientConnection clientConnection;
-
-    @Context
-    private HttpRequest request;
-
-    @Context
-    private HttpHeaders headers;
-
     private RealmModel realm;
-    private EventBuilder event;
     private ClientModel client;
     private String redirectUri;
 
-    public LogoutEndpoint(RealmModel realm, EventBuilder event) {
+    public LogoutEndpoint(KeycloakSession session, RealmModel realm) {
+        this.session = session;
         this.realm = realm;
-        this.event = event;
     }
 
     @GET
@@ -55,13 +40,22 @@
         if (authResult != null) {
             UserSessionModel userSession = authResult.getSession();
             userSession.setNote(AuthenticationManager.KEYCLOAK_LOGOUT_PROTOCOL, CASLoginProtocol.LOGIN_PROTOCOL);
-            if (redirectUri != null) userSession.setNote(CASLoginProtocol.LOGOUT_REDIRECT_URI, redirectUri);
+
+            if (redirectUri != null) {
+                userSession.setNote(CASLoginProtocol.LOGOUT_REDIRECT_URI, redirectUri);
+            }
 
             logger.debug("Initiating CAS browser logout");
-            Response response =  AuthenticationManager.browserLogout(session, realm, authResult.getSession(), session.getContext().getUri(), clientConnection, headers);
+            Response response = AuthenticationManager.browserLogout(session, realm, authResult.getSession(), session.getContext().getUri(), session.getContext().getConnection(), session.getContext().getRequestHeaders());
             logger.debug("finishing CAS browser logout");
             return response;
         }
+
+        if (redirectUri != null) {
+            logger.debugv("no active session, redirecting to {0}", redirectUri);
+            return Response.status(302).location(URI.create(redirectUri)).build();
+        }
+
         return ErrorPage.error(session, null, Response.Status.BAD_REQUEST, Messages.FAILED_LOGOUT);
     }
 
@@ -70,7 +64,7 @@
             return;
         }
 
-        client = realm.getClients().stream()
+        client = realm.getClientsStream()
                 .filter(c -> CASLoginProtocol.LOGIN_PROTOCOL.equals(c.getProtocol()))
                 .filter(c -> RedirectUtils.verifyRedirectUri(session, service, c) != null)
                 .findFirst().orElse(null);

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