|  | #!/usr/bin/env python | 
|  | # Copyright 2016 The Chromium Authors | 
|  | # Use of this source code is governed by a BSD-style license that can be | 
|  | # found in the LICENSE file. | 
|  |  | 
|  | """Certificate chain with 2 intermediates and one end entity certificate. The | 
|  | root certificate has a pathlen:1 restriction. Ordinarily this would be an | 
|  | invalid chain, however constraints on this trust anchor are not enforced.""" | 
|  |  | 
|  | import sys | 
|  | sys.path += ['../..'] | 
|  |  | 
|  | import gencerts | 
|  |  | 
|  | # Self-signed root certificate (used as trust anchor). | 
|  | root = gencerts.create_self_signed_root_certificate('Root') | 
|  | root.get_extensions().set_property('basicConstraints', | 
|  | 'critical,CA:true,pathlen:1') | 
|  |  | 
|  | # Intermediate 1 (no pathlen restriction). | 
|  | intermediate1 = gencerts.create_intermediate_certificate('Intermediate1', root) | 
|  |  | 
|  | # Intermediate 2 (no pathlen restriction). | 
|  | intermediate2 = gencerts.create_intermediate_certificate('Intermediate2', | 
|  | intermediate1) | 
|  |  | 
|  | # Target certificate. | 
|  | target = gencerts.create_end_entity_certificate('Target', intermediate2) | 
|  |  | 
|  | chain = [target, intermediate2, intermediate1, root] | 
|  | gencerts.write_chain(__doc__, chain, 'chain.pem') |