fix: build client symmetric keys from all client signing alg properties

Author: panva

lib/models/client.js

@@ -309,7 +309,20 @@ module.exports = function getClient(provider) {
         }
       });
 
-      instance(provider).configuration('requestObjectSigningAlgValues').forEach(Set.prototype.add.bind(algs));
+      [
+        'introspectionSignedResponseAlg',
+        'userinfoSignedResponseAlg',
+        'authorizationSignedResponseAlg',
+        'idTokenSignedResponseAlg',
+        'requestObjectSigningAlg',
+      ].forEach((prop) => {
+        algs.add(client[prop]);
+      });
+
+      if (!client.requestObjectSigningAlg) {
+        instance(provider).configuration('requestObjectSigningAlgValues').forEach(Set.prototype.add.bind(algs));
+      }
+
       instance(provider).configuration('requestObjectEncryptionAlgValues').forEach(Set.prototype.add.bind(algs));
 
       if (instance(provider).configuration('requestObjectEncryptionAlgValues').includes('dir')) {