handle fields with no /Type set

MatthiasValvekens · Dec 13, 2023 · 4ae8be8 · 4ae8be8
1 parent 5f9ac0f
commit 4ae8be8
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/pyhanko/sign/diff_analysis/rules/form_field_rules.py b/pyhanko/sign/diff_analysis/rules/form_field_rules.py
@@ -661,7 +661,11 @@ def check_form_field(
         # /DocTimeStamps added for LTA validation purposes shouldn't have
         # an appearance (as per the recommendation in ISO 32000-2, which we
         # enforce as a rigid rule here)
-        if sig_obj.raw_get('/Type') == '/DocTimeStamp' and not visible:
+        if (
+            '/Type' in sig_obj
+            and sig_obj.raw_get('/Type') == '/DocTimeStamp'
+            and not visible
+        ):
             sig_whitelist = ModificationLevel.LTA_UPDATES
             valid_when_locked = True
         else: