1#!/usr/bin/env python 2# Copyright 2017 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 intermediate restricts the extended key usage to 7clientAuth, and the target asserts serverAuth + clientAuth.""" 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) 19intermediate.get_extensions().set_property('extendedKeyUsage', 20 'clientAuth') 21 22# Target certificate. 23target = gencerts.create_end_entity_certificate('Target', intermediate) 24target.get_extensions().set_property('extendedKeyUsage', 25 'serverAuth,clientAuth') 26 27chain = [target, intermediate, root] 28gencerts.write_chain(__doc__, chain, 'chain.pem') 29