lib: test edgecase for timedelta_from_string

authentik/lib/tests/test_utils_time.py

@@ -20,6 +20,8 @@ class TestTimeUtils(TestCase):
         """Test invalid expression"""
         with self.assertRaises(ValueError):
             timedelta_from_string("foo")
+        with self.assertRaises(ValueError):
+            timedelta_from_string("bar=baz")
 
     def test_validation(self):
         """Test Django model field validator"""

authentik/lib/utils/time.py

@@ -35,4 +35,6 @@ def timedelta_from_string(expr: str) -> datetime.timedelta:
         if key.lower() not in ALLOWED_KEYS:
             continue
         kwargs[key.lower()] = float(value)
+    if len(kwargs) < 1:
+        raise ValueError("No valid keys to pass to timedelta")
     return datetime.timedelta(**kwargs)