From bf2a8408e57a1b8d6b8abf040862fd1e4935c00c Mon Sep 17 00:00:00 2001
From: Vaclav Muzikar <vmuzikar@redhat.com>
Date: Fri, 12 Aug 2016 12:02:17 +0000
Subject: [PATCH] KEYCLOAK-3429 Fix behaviour of redirect_uri parameter with query components

---
 src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java |   19 ++++++++-----------
 1 files changed, 8 insertions(+), 11 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 e564090..b7d9ad4 100644
--- a/src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java
+++ b/src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java
@@ -69,20 +69,15 @@
 
     private static String verifyRedirectUri(UriInfo uriInfo, String rootUrl, String redirectUri, RealmModel realm, Set<String> validRedirects) {
         if (redirectUri == null) {
-            if (validRedirects.size() != 1) return null;
-            String validRedirect = validRedirects.iterator().next();
-            int idx = validRedirect.indexOf("/*");
-            if (idx > -1) {
-                validRedirect = validRedirect.substring(0, idx);
-            }
-            redirectUri = validRedirect;
+            logger.debug("No Redirect URI parameter specified");
+            return null;
         } else if (validRedirects.isEmpty()) {
             logger.debug("No Redirect URIs supplied");
             redirectUri = null;
         } else {
             redirectUri = lowerCaseHostname(redirectUri);
 
-            String r = redirectUri.indexOf('?') != -1 ? redirectUri.substring(0, redirectUri.indexOf('?')) : redirectUri;
+            String r = redirectUri;
             Set<String> resolveValidRedirects = resolveValidRedirects(uriInfo, rootUrl, validRedirects);
 
             boolean valid = matchesRedirects(resolveValidRedirects, r);
@@ -139,15 +134,17 @@
 
     private static boolean matchesRedirects(Set<String> validRedirects, String redirect) {
         for (String validRedirect : validRedirects) {
-            if (validRedirect.endsWith("*")) {
+            if (validRedirect.endsWith("*") && !validRedirect.contains("?")) {
+                // strip off the query component - we don't check them when wildcards are effective
+                String r = redirect.contains("?") ? redirect.substring(0, redirect.indexOf("?")) : redirect;
                 // strip off *
                 int length = validRedirect.length() - 1;
                 validRedirect = validRedirect.substring(0, length);
-                if (redirect.startsWith(validRedirect)) return true;
+                if (r.startsWith(validRedirect)) return true;
                 // strip off trailing '/'
                 if (length - 1 > 0 && validRedirect.charAt(length - 1) == '/') length--;
                 validRedirect = validRedirect.substring(0, length);
-                if (validRedirect.equals(redirect)) return true;
+                if (validRedirect.equals(r)) return true;
             } else if (validRedirect.equals(redirect)) return true;
         }
         return false;

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