Added precondition checking in resumeProcessing (#1906)

vinay-athiyil · web-flow · commit 0c9944a8bb84 · 2023-11-27T21:49:04.000+01:00
diff --git a/src/SimpleSAML/Auth/ProcessingChain.php b/src/SimpleSAML/Auth/ProcessingChain.php
@@ -240,7 +240,9 @@ public static function resumeProcessing(array $state): Response
         while (count($state[self::FILTERS_INDEX]) > 0) {
             $filter = array_shift($state[self::FILTERS_INDEX]);
             try {
-                $filter->process($state);
+                if ($filter->checkPrecondition($state) === true) {
+                    $filter->process($state);
+                }
             } catch (Error\Exception $e) {
                 State::throwException($state, $e);
             } catch (Exception $e) {
