From b3e128c6ef0d71e22ca917d582702d71160dbdbb Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Tue, 03 Nov 2026 21:04:42 +0000
Subject: [PATCH] Store single logout ticket only after successful validation
---
src/main/java/org/keycloak/protocol/cas/endpoints/AbstractValidateEndpoint.java | 50 ++++++++++++++++++++++++++++++++++++++++----------
1 files changed, 40 insertions(+), 10 deletions(-)
diff --git a/src/main/java/org/keycloak/protocol/cas/endpoints/AbstractValidateEndpoint.java b/src/main/java/org/keycloak/protocol/cas/endpoints/AbstractValidateEndpoint.java
index afc9c2c..6a93fac 100644
--- a/src/main/java/org/keycloak/protocol/cas/endpoints/AbstractValidateEndpoint.java
+++ b/src/main/java/org/keycloak/protocol/cas/endpoints/AbstractValidateEndpoint.java
@@ -18,6 +18,7 @@
import org.keycloak.services.managers.UserSessionCrossDCManager;
import org.keycloak.services.util.DefaultClientSessionContext;
+import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.HexFormat;
@@ -27,15 +28,25 @@
import java.util.UUID;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.HttpResponse;
-import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.util.EntityUtils;
+import org.keycloak.connections.httpclient.HttpClientProvider;
public abstract class AbstractValidateEndpoint {
protected final Logger logger = Logger.getLogger(getClass());
private static final Pattern DOT = Pattern.compile("\\.");
private static final Pattern SEPERATION_PATTERN = Pattern.compile("--");
+ private static final int PGT_CALLBACK_TIMEOUT_MS = 5000;
+ private static final RequestConfig PGT_CALLBACK_REQUEST_CONFIG = RequestConfig.custom()
+ .setConnectTimeout(PGT_CALLBACK_TIMEOUT_MS)
+ .setConnectionRequestTimeout(PGT_CALLBACK_TIMEOUT_MS)
+ .setSocketTimeout(PGT_CALLBACK_TIMEOUT_MS)
+ .setRedirectsEnabled(false)
+ .build();
protected KeycloakSession session;
protected RealmModel realm;
protected EventBuilder event;
@@ -175,8 +186,6 @@
throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Ticket was not issued for this service", Response.Status.BAD_REQUEST);
}
- clientSession.setNote(CASLoginProtocol.SESSION_TICKET, ticket);
-
if (requireReauth && AuthenticationManager.isSSOAuthentication(clientSession)) {
event.error(Errors.SESSION_EXPIRED);
throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Interactive authentication was requested but not performed", Response.Status.BAD_REQUEST);
@@ -215,28 +224,49 @@
throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Session not active", Response.Status.BAD_REQUEST);
}
+ // Single logout refers to the service ticket the client session was established with
+ if (prefix.equals(CASLoginProtocol.SERVICE_TICKET_PREFIX)) {
+ clientSession.setNote(CASLoginProtocol.SESSION_TICKET, ticket);
+ }
}
protected void createProxyGrant(String pgtUrl) {
- if ( RedirectUtils.verifyRedirectUri(session, pgtUrl, client) == null ) {
+ String verifiedPgtUrl = RedirectUtils.verifyRedirectUri(session, pgtUrl, client);
+ if (verifiedPgtUrl == null) {
event.error(Errors.INVALID_REQUEST);
throw new CASValidationException(CASErrorCode.INVALID_PROXY_CALLBACK, "Proxy callback is invalid", Response.Status.BAD_REQUEST);
}
+ // The callback receives a PGT, so require HTTPS unless the realm's "Require SSL" setting allows plain HTTP for the host
+ URI pgtUri = URI.create(verifiedPgtUrl);
+ boolean isHttps = "https".equalsIgnoreCase(pgtUri.getScheme());
+ boolean isHttp = "http".equalsIgnoreCase(pgtUri.getScheme());
+ if (pgtUri.getHost() == null || !(isHttps || (isHttp && !realm.getSslRequired().isRequired(pgtUri.getHost())))) {
+ event.error(Errors.INVALID_REQUEST);
+ throw new CASValidationException(CASErrorCode.INVALID_PROXY_CALLBACK, "Proxy callback must use HTTPS", Response.Status.BAD_REQUEST);
+ }
+
String pgtIou = getPGTIOU();
- String pgtId = getPGT(session, clientSession, pgtUrl);
+ String pgtId = getPGT(session, clientSession, verifiedPgtUrl);
try {
- HttpResponse response = HttpClientBuilder.create().build().execute(
- new HttpGet(new URIBuilder(pgtUrl).setParameter("pgtIou",pgtIou).setParameter("pgtId",pgtId).build())
- );
+ HttpGet request = new HttpGet(new URIBuilder(verifiedPgtUrl).setParameter("pgtIou",pgtIou).setParameter("pgtId",pgtId).build());
+ request.setConfig(PGT_CALLBACK_REQUEST_CONFIG);
- if (response.getStatusLine().getStatusCode() != 200) {
- throw new Exception();
+ HttpClient httpClient = session.getProvider(HttpClientProvider.class).getHttpClient();
+ HttpResponse response = httpClient.execute(request);
+ try {
+ if (response.getStatusLine().getStatusCode() != 200) {
+ throw new Exception();
+ }
+ } finally {
+ EntityUtils.consumeQuietly(response.getEntity());
}
this.pgtIou = pgtIou;
} catch (Exception e) {
+ // The PGT was not delivered, so do not leave it usable
+ session.singleUseObjects().remove(pgtId.substring(0, pgtId.indexOf("--")));
event.error(Errors.INVALID_REQUEST);
throw new CASValidationException(CASErrorCode.PROXY_CALLBACK_ERROR, "Proxy callback returned an error", Response.Status.BAD_REQUEST);
}
--
Gitblit v1.10.0