1#!/usr/bin/env python3 2# Copyright 2015 The Chromium Authors 3# Use of this source code is governed by a BSD-style license that can be 4# found in the LICENSE file. 5 6"""Certificate chain where the target certificate contains an unknown X.509v3 7extension (OID=1.2.3.4) that is marked as critical.""" 8 9import sys 10sys.path += ['../..'] 11 12import gencerts 13 14# Self-signed root certificate. 15root = gencerts.create_self_signed_root_certificate('Root') 16 17# Intermediate certificate. 18intermediate = gencerts.create_intermediate_certificate('Intermediate', root) 19 20# Target certificate (has unknown critical extension). 21target = gencerts.create_end_entity_certificate('Target', intermediate) 22target.get_extensions().add_property('1.2.3.4', 23 'critical,DER:01:02:03:04') 24 25chain = [target, intermediate, root] 26gencerts.write_chain(__doc__, chain, 'chain.pem') 27 28gencerts.write_chain(__doc__, [target], 'target_only.pem') 29