From 1a850e8735f8b91813b6e3908716ad9177bb9a28 Mon Sep 17 00:00:00 2001
From: Stian Thorgersen <stianst@gmail.com>
Date: Fri, 14 Nov 2025 08:34:49 +0000
Subject: [PATCH] Proposed import order (#43432)

---
 src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java |   58 +++++++++++++++-------------------------------------------
 1 files changed, 15 insertions(+), 43 deletions(-)

diff --git a/src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java b/src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java
index de8fd84..889d884 100644
--- a/src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java
+++ b/src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java
@@ -17,41 +17,34 @@
 
 package org.keycloak.protocol.oidc.utils;
 
-import org.jboss.logging.Logger;
+import java.net.URI;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.regex.Pattern;
+
+import org.keycloak.common.util.KeycloakUriBuilder;
 import org.keycloak.common.util.UriUtils;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.Constants;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.models.KeycloakUriInfo;
 import org.keycloak.models.RealmModel;
-import org.keycloak.protocol.oidc.OIDCLoginProtocol;
 import org.keycloak.services.Urls;
 import org.keycloak.services.util.ResolveRelative;
 
-import java.net.URI;
-import java.util.Collection;
-import java.util.Set;
-import java.util.TreeSet;
-import java.util.regex.Pattern;
-import java.util.stream.Collectors;
+import org.jboss.logging.Logger;
 
 /**
  * @author <a href="mailto:sthorger@redhat.com">Stian Thorgersen</a>
  */
 public class RedirectUtils {
 
-    private static final Logger logger = Logger.getLogger(RedirectUtils.class);
+    public static final Set<String> LOOPBACK_INTERFACES = new HashSet<>(Arrays.asList("localhost", "127.0.0.1", "[::1]"));
 
-    /**
-     * This method is deprecated for performance and security reasons and it is available just for the
-     * backwards compatibility. It is recommended to use some other methods of this class where the client is given as an argument
-     * to the method, so we know the client, which redirect-uri we are trying to resolve.
-     */
-    @Deprecated
-    public static String verifyRealmRedirectUri(KeycloakSession session, String redirectUri) {
-        Set<String> validRedirects = getValidateRedirectUris(session);
-        return verifyRedirectUri(session, null, redirectUri, validRedirects, true);
-    }
+    private static final Logger logger = Logger.getLogger(RedirectUtils.class);
 
     public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client) {
         return verifyRedirectUri(session, redirectUri, client, true);
@@ -77,16 +70,6 @@
         return resolveValidRedirects;
     }
 
-    @Deprecated
-    private static Set<String> getValidateRedirectUris(KeycloakSession session) {
-        RealmModel realm = session.getContext().getRealm();
-        return session.clients().getAllRedirectUrisOfEnabledClients(realm).entrySet().stream()
-          .filter(me -> me.getKey().isEnabled() && OIDCLoginProtocol.LOGIN_PROTOCOL.equals(me.getKey().getProtocol()) && !me.getKey().isBearerOnly() && (me.getKey().isStandardFlowEnabled() || me.getKey().isImplicitFlowEnabled()))
-          .map(me -> resolveValidRedirects(session, me.getKey().getRootUrl(), me.getValue()))
-          .flatMap(Collection::stream)
-          .collect(Collectors.toSet());
-    }
-
     public static String verifyRedirectUri(KeycloakSession session, String rootUrl, String redirectUri, Set<String> validRedirects, boolean requireRedirectUri) {
         KeycloakUriInfo uriInfo = session.getContext().getUri();
         RealmModel realm = session.getContext().getRealm();
@@ -118,20 +101,9 @@
 
             String valid = matchesRedirects(resolveValidRedirects, r, allowWildcards);
 
-            if (valid == null && (r.startsWith(Constants.INSTALLED_APP_URL) || r.startsWith(Constants.INSTALLED_APP_LOOPBACK)) && r.indexOf(':', Constants.INSTALLED_APP_URL.length()) >= 0) {
-                int i = r.indexOf(':', Constants.INSTALLED_APP_URL.length());
-
-                StringBuilder sb = new StringBuilder();
-                sb.append(r.substring(0, i));
-
-                i = r.indexOf('/', i);
-                if (i >= 0) {
-                    sb.append(r.substring(i));
-                }
-
-                r = sb.toString();
-
-                valid = matchesRedirects(resolveValidRedirects, r, allowWildcards);
+            if (valid == null && "http".equals(originalRedirect.getScheme()) && LOOPBACK_INTERFACES.contains(originalRedirect.getHost())) {
+                String redirectWithDefaultPort = KeycloakUriBuilder.fromUri(originalRedirect).port(80).buildAsString();
+                valid = matchesRedirects(resolveValidRedirects, redirectWithDefaultPort, allowWildcards);
             }
 
             if (valid != null && !originalRedirect.isAbsolute()) {

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