pki/testdata/verify_certificate_chain_unittest/policies-on-root-wrong/generate-chains.py

#!/usr/bin/env python3
# Copyright 2023 The Chromium Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Certificate chain with policies and requireExplicitPolicy, including
policies on the root which don't match the policies in the rest of the chain.
This should fail to verify if the policies on the root are processed."""

import sys
sys.path += ['../..']

import gencerts

# Self-signed root certificate.
root = gencerts.create_self_signed_root_certificate('Root')
root.get_extensions().set_property('certificatePolicies', 'critical,1.2.3.5')

# Intermediate certificate.
intermediate = gencerts.create_intermediate_certificate('Intermediate', root)
intermediate.get_extensions().set_property('certificatePolicies',
                                           'critical,1.2.3.4')
intermediate.get_extensions().set_property('policyConstraints',
                                           'critical,requireExplicitPolicy:0')

# Target certificate.
target = gencerts.create_end_entity_certificate('Target', intermediate)
target.get_extensions().set_property('certificatePolicies', 'critical,1.2.3.4')

chain = [target, intermediate, root]
gencerts.write_chain(__doc__, chain, 'chain.pem')