pki/testdata/verify_certificate_chain_unittest/target-signed-by-512bit-rsa/generate-chains.py

#!/usr/bin/env python
# Copyright 2015 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 target certificate is signed using a weak RSA
key (512-bit modulus)."""

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

import gencerts

# Self-signed root certificate.
root = gencerts.create_self_signed_root_certificate('Root')

# Intermediate with a very weak key size (512-bit RSA).
intermediate = gencerts.create_intermediate_certificate('Intermediate', root)
intermediate.set_key(gencerts.get_or_generate_rsa_key(
    512, gencerts.create_key_path(intermediate.name)))

# Target certificate.
target = gencerts.create_end_entity_certificate('Target', intermediate)

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