From 281a7ed1c82d92bbf09c18ca1bbdff19d1bc0e05 Mon Sep 17 00:00:00 2001
From: Mateusz Małek <ieg3lwut8aippmr7tzhqyznn@noreply.damisa.net>
Date: Tue, 08 Nov 2022 09:07:44 +0000
Subject: [PATCH] Match Apereo CAS behavior with regard to single log-out

---
 src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java b/src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java
index 1526d21..d046247 100644
--- a/src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java
+++ b/src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java
@@ -35,6 +35,13 @@
     public Response build() {
         MultivaluedMap<String, String> params = session.getContext().getUri().getQueryParameters();
         String service = params.getFirst(CASLoginProtocol.SERVICE_PARAM);
+
+        boolean isSaml11Request = false;
+        if (service == null && params.containsKey(CASLoginProtocol.TARGET_PARAM)) {
+            // SAML 1.1 authorization uses the TARGET parameter instead of service
+            service = params.getFirst(CASLoginProtocol.TARGET_PARAM);
+            isSaml11Request = true;
+        }
         boolean renew = params.containsKey(CASLoginProtocol.RENEW_PARAM);
         boolean gateway = params.containsKey(CASLoginProtocol.GATEWAY_PARAM);
 
@@ -54,6 +61,10 @@
         if (gateway) {
             authenticationSession.setClientNote(CASLoginProtocol.GATEWAY_PARAM, "true");
         }
+        if (isSaml11Request) {
+            // Flag the session so we can return the ticket as "SAMLart" in the response
+            authenticationSession.setClientNote(CASLoginProtocol.TARGET_PARAM, "true");
+        }
 
         this.event.event(EventType.LOGIN);
         return handleBrowserAuthenticationRequest(authenticationSession, new CASLoginProtocol(session, realm, session.getContext().getUri(), headers, event), gateway, false);

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