| #!/usr/bin/env python |
| # Copyright 2019 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 where the intermediate was signed by a different |
| certificate with a different key. The intermediate lacks an |
| authorityKeyIdentifier extension as some verifiers will not try verifying with |
| the bogus root if the authorityKeyIdentifier does not match the root's |
| subjectKeyIdentifier. |
| """ |
| |
| import sys |
| sys.path += ['../..'] |
| |
| import gencerts |
| |
| # Self-signed root certificate, which actually signed the intermediate. |
| root = gencerts.create_self_signed_root_certificate('Root') |
| section = root.config.get_section('signing_ca_ext') |
| # Don't include authorityKeyIdentifier extension in the intermediate issued by |
| # the real root, otherwise the verifier might not even try to validate the |
| # signature against the bogus root. |
| section.remove_property('authorityKeyIdentifier') |
| |
| # Intermediate certificate. |
| intermediate = gencerts.create_intermediate_certificate('Intermediate', root) |
| |
| # Target certificate. |
| target = gencerts.create_end_entity_certificate('Target', intermediate) |
| # TODO(eroman): Set subjectAltName by default rather than specifically in |
| # this test. |
| target.get_extensions().set_property('subjectAltName', 'DNS:test.example') |
| |
| # Self-signed root certificate that has nothing to do with this chain, but will |
| # be saved as its root certificate. |
| bogus_root = gencerts.create_self_signed_root_certificate('Root') |
| |
| chain = [target, intermediate, bogus_root] |
| gencerts.write_chain(__doc__, chain, 'chain.pem') |
