#!/usr/bin/env python
# Copyright 2017 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Generates certificate chains where the intermediate contains netscape server
gated crypto rather than serverAuth."""

import sys

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

import gencerts


def generate_chain(intermediate_digest_algorithm):
  # Self-signed root certificate.
  root = gencerts.create_self_signed_root_certificate('Root')

  # Intermediate certificate.
  intermediate = gencerts.create_intermediate_certificate('Intermediate', root)
  intermediate.set_signature_hash(intermediate_digest_algorithm)
  intermediate.get_extensions().set_property('extendedKeyUsage', 'nsSGC')

  # Target certificate.
  target = gencerts.create_end_entity_certificate('Target', intermediate)
  target.get_extensions().set_property(
    'extendedKeyUsage', 'serverAuth,clientAuth'
  )
  # TODO(eroman): Set subjectAltName by default rather than specifically in
  # this test.
  target.get_extensions().set_property('subjectAltName', 'DNS:test.example')

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


# Generate two chains, whose only difference is the digest algorithm used for
# the intermediate's signature.
for digest in ['sha1', 'sha256']:
  generate_chain(digest)