net/data/verify_certificate_chain_unittest/generate-target-signed-by-512bit-rsa.py

#!/usr/bin/python
# Copyright (c) 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Certificate chain with 1 intermediate and a trusted root. The target
certificate is signed using a weak RSA key (512-bit modulus), and so
verification is expected to fail."""

import common

# Self-signed root certificate (used as trust anchor).
root = common.create_self_signed_root_certificate('Root')

# Intermediate with a very weak key size (512-bit RSA).
intermediate = common.create_intermediate_certificate('Intermediate', root)
intermediate.set_key(common.generate_rsa_key(512))

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

chain = [target, intermediate]
trusted = common.TrustAnchor(root, constrained=False)
time = common.DEFAULT_TIME
verify_result = False
errors = """[Context] Processing Certificate
  index: 1
      [Error] RSA modulus too small
        actual: 512
        minimum: 1024
      [Error] Unacceptable modulus length for RSA key
      [Error] VerifySignedData failed
"""

common.write_test_file(__doc__, chain, trusted, time, verify_result, errors)