throw on invalid client document

Author: ylebre

lib/ClientRegistration.php

@@ -26,6 +26,12 @@ public static function getRegistration($clientId) {
 		public static function getRemoteRegistration($url) {
 			$clientDocument = file_get_contents($url);
 			$clientRegistration = json_decode($clientDocument, true);
+			if (!isset($clientRegistration['client_id'])) {
+				throw new \Exception("No client ID found in client document");
+			}
+			if (!isset($clientRegistration['redirect_uris'])) {
+				throw new \Exception("No redirect URIs found in client document");
+			}
 			return $clientRegistration;
 		}