1#!/usr/bin/env python3 2# Copyright 2022 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"""Certificate chain where the root keyUsage extension is present but does not 6contain keyCertSign.""" 7 8import sys 9sys.path += ['../..'] 10 11import gencerts 12 13# Self-signed root certificate without keyCertSign. 14root = gencerts.create_self_signed_root_certificate('Root') 15root.get_extensions().set_property('keyUsage', 16 'critical,digitalSignature,keyEncipherment') 17 18# Intermediate certificate. 19intermediate = gencerts.create_intermediate_certificate('Intermediate', root) 20 21# Target certificate. 22target = gencerts.create_end_entity_certificate('Target', intermediate) 23 24chain = [target, intermediate, root] 25gencerts.write_chain(__doc__, chain, 'chain.pem') 26