Fix test LDAP connection with multiple ldap connection urls

Previously, the given connection string was check with URI.create(..) which
failed when multiple space separated LDAP URLs were given.

Closes #31267

Signed-off-by: Thomas Darimont <thomas.darimont@googlemail.com>

federation/ldap/src/main/java/org/keycloak/services/managers/LDAPServerCapabilitiesManager.java

@@ -27,6 +27,7 @@ import org.keycloak.common.util.MultivaluedHashMap;
 import org.keycloak.component.ComponentModel;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.models.LDAPConstants;
+import org.keycloak.models.ModelValidationException;
 import org.keycloak.models.RealmModel;
 import org.keycloak.representations.idm.ComponentRepresentation;
 import org.keycloak.representations.idm.TestLdapConnectionRepresentation;
@@ -73,7 +74,7 @@ public class LDAPServerCapabilitiesManager {
             ComponentModel component = realm.getComponent(config.getComponentId());
             if (component != null) {
                 LDAPConfig ldapConfig = new LDAPConfig(component.getConfig());
-                if (Objects.equals(URI.create(config.getConnectionUrl()), URI.create(ldapConfig.getConnectionUrl()))
+                if (checkLdapConnectionUrl(config, ldapConfig)
                         && config.getBindDn() != null && config.getBindDn().equalsIgnoreCase(ldapConfig.getBindDN())) {
                     bindCredential = ldapConfig.getBindCredential();
                 }
@@ -94,6 +95,28 @@ public class LDAPServerCapabilitiesManager {
         return new LDAPConfig(configMap);
     }
 
+    /**
+     * Ensure provided connection URI matches parsed LDAP connection URI.
+     *
+     * See: https://docs.oracle.com/javase/jndi/tutorial/ldap/misc/url.html
+     * @param config
+     * @param ldapConfig
+     * @return
+     */
+    private static boolean checkLdapConnectionUrl(TestLdapConnectionRepresentation config, LDAPConfig ldapConfig) {
+        // There could be multiple connection URIs separated via spaces.
+        String[] configConnectionUrls = config.getConnectionUrl().trim().split(" ");
+        String[] ldapConfigConnectionUrls = ldapConfig.getConnectionUrl().trim().split(" ");
+        if (configConnectionUrls.length != ldapConfigConnectionUrls.length) {
+            return false;
+        }
+        boolean urlsMatch = true;
+        for (int i = 0; i < configConnectionUrls.length && urlsMatch; i++) {
+            urlsMatch = Objects.equals(URI.create(configConnectionUrls[i]), URI.create(ldapConfigConnectionUrls[i]));
+        }
+        return urlsMatch;
+    }
+
     public static Set<LDAPCapabilityRepresentation> queryServerCapabilities(TestLdapConnectionRepresentation config, KeycloakSession session,
                                                                             RealmModel realm) {
 

testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/admin/UserFederationLdapConnectionTest.java

@@ -131,6 +131,7 @@ public class UserFederationLdapConnectionTest extends AbstractAdminTest {
 
     @Test
     public void testLdapConnectionMoreServers() {
+
         // Both servers work
         Response response = realm.testLDAPConnection(new TestLdapConnectionRepresentation(LDAPServerCapabilitiesManager.TEST_AUTHENTICATION, "ldap://localhost:10389 ldaps://localhost:10636", "uid=admin,ou=system", "secret", "true", null));
         assertStatus(response, 204);
@@ -155,11 +156,23 @@ public class UserFederationLdapConnectionTest extends AbstractAdminTest {
         response = realm.testLDAPConnection(new TestLdapConnectionRepresentation(LDAPServerCapabilitiesManager.TEST_AUTHENTICATION, "ldap://localhostt:10389 ldaps://localhostt:10636", "uid=admin,ou=system", "secret", "true", null));
         assertStatus(response, 400);
 
+        // create LDAP component model using ldap
+        Map<String, String> cfg = ldapRule.getConfig();
+        cfg.put(LDAPConstants.CONNECTION_URL, "ldap://invalid:10389 ldap://localhost:10389");
+        cfg.put(LDAPConstants.CONNECTION_TIMEOUT, "1000");
+        String ldapModelId = testingClient.testing().ldap(REALM_NAME).createLDAPProvider(cfg, false);
+
+        // Only 2nd server works with stored LDAP federation provider
+        response = realm.testLDAPConnection(new TestLdapConnectionRepresentation(LDAPServerCapabilitiesManager.TEST_AUTHENTICATION,
+                cfg.get(LDAPConstants.CONNECTION_URL), cfg.get(LDAPConstants.BIND_DN), ComponentRepresentation.SECRET_VALUE,
+                cfg.get(LDAPConstants.USE_TRUSTSTORE_SPI), cfg.get(LDAPConstants.CONNECTION_TIMEOUT),cfg.get(LDAPConstants.START_TLS),
+                cfg.get(LDAPConstants.AUTH_TYPE), ldapModelId));
+        assertStatus(response, 204);
     }
 
     @Test
     public void testLdapConnectionComponentAlreadyCreated() {
-        // create ldap componnet model using ldaps
+        // create ldap component model using ldaps
         Map<String, String> cfg = ldapRule.getConfig();
         cfg.put(LDAPConstants.CONNECTION_URL, "ldaps://localhost:10636");
         cfg.put(LDAPConstants.START_TLS, "false");