Viewing file:  crypto_util_test.py (9.98 KB) -rw-r--r--
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"""Tests for acme.crypto_util."""
import itertools
import socket
import threading
import time
import unittest
import six
from six.moves import socketserver #type: ignore # pylint: disable=import-error
import josepy as jose
import OpenSSL
from acme import errors
from acme import test_util
from acme.magic_typing import List # pylint: disable=unused-import, no-name-in-module
class SSLSocketAndProbeSNITest(unittest.TestCase):
"""Tests for acme.crypto_util.SSLSocket/probe_sni."""
def setUp(self):
self.cert = test_util.load_comparable_cert('rsa2048_cert.pem')
key = test_util.load_pyopenssl_private_key('rsa2048_key.pem')
# pylint: disable=protected-access
certs = {b'foo': (key, self.cert.wrapped)}
from acme.crypto_util import SSLSocket
class _TestServer(socketserver.TCPServer):
# pylint: disable=too-few-public-methods
# six.moves.* | pylint: disable=attribute-defined-outside-init,no-init
def server_bind(self): # pylint: disable=missing-docstring
self.socket = SSLSocket(socket.socket(), certs=certs)
socketserver.TCPServer.server_bind(self)
self.server = _TestServer(('', 0), socketserver.BaseRequestHandler)
self.port = self.server.socket.getsockname()[1]
self.server_thread = threading.Thread(
# pylint: disable=no-member
target=self.server.handle_request)
def tearDown(self):
if self.server_thread.is_alive():
# The thread may have already terminated.
self.server_thread.join() # pragma: no cover
def _probe(self, name):
from acme.crypto_util import probe_sni
return jose.ComparableX509(probe_sni(
name, host='127.0.0.1', port=self.port))
def _start_server(self):
self.server_thread.start()
time.sleep(1) # TODO: avoid race conditions in other way
def test_probe_ok(self):
self._start_server()
self.assertEqual(self.cert, self._probe(b'foo'))
def test_probe_not_recognized_name(self):
self._start_server()
self.assertRaises(errors.Error, self._probe, b'bar')
def test_probe_connection_error(self):
# pylint has a hard time with six
self.server.server_close() # pylint: disable=no-member
original_timeout = socket.getdefaulttimeout()
try:
socket.setdefaulttimeout(1)
self.assertRaises(errors.Error, self._probe, b'bar')
finally:
socket.setdefaulttimeout(original_timeout)
class PyOpenSSLCertOrReqAllNamesTest(unittest.TestCase):
"""Test for acme.crypto_util._pyopenssl_cert_or_req_all_names."""
@classmethod
def _call(cls, loader, name):
# pylint: disable=protected-access
from acme.crypto_util import _pyopenssl_cert_or_req_all_names
return _pyopenssl_cert_or_req_all_names(loader(name))
def _call_cert(self, name):
return self._call(test_util.load_cert, name)
def test_cert_one_san_no_common(self):
self.assertEqual(self._call_cert('cert-nocn.der'),
['no-common-name.badssl.com'])
def test_cert_no_sans_yes_common(self):
self.assertEqual(self._call_cert('cert.pem'), ['example.com'])
def test_cert_two_sans_yes_common(self):
self.assertEqual(self._call_cert('cert-san.pem'),
['example.com', 'www.example.com'])
class PyOpenSSLCertOrReqSANTest(unittest.TestCase):
"""Test for acme.crypto_util._pyopenssl_cert_or_req_san."""
@classmethod
def _call(cls, loader, name):
# pylint: disable=protected-access
from acme.crypto_util import _pyopenssl_cert_or_req_san
return _pyopenssl_cert_or_req_san(loader(name))
@classmethod
def _get_idn_names(cls):
"""Returns expected names from '{cert,csr}-idnsans.pem'."""
chars = [six.unichr(i) for i in itertools.chain(range(0x3c3, 0x400),
range(0x641, 0x6fc),
range(0x1820, 0x1877))]
return [''.join(chars[i: i + 45]) + '.invalid'
for i in range(0, len(chars), 45)]
def _call_cert(self, name):
return self._call(test_util.load_cert, name)
def _call_csr(self, name):
return self._call(test_util.load_csr, name)
def test_cert_no_sans(self):
self.assertEqual(self._call_cert('cert.pem'), [])
def test_cert_two_sans(self):
self.assertEqual(self._call_cert('cert-san.pem'),
['example.com', 'www.example.com'])
def test_cert_hundred_sans(self):
self.assertEqual(self._call_cert('cert-100sans.pem'),
['example{0}.com'.format(i) for i in range(1, 101)])
def test_cert_idn_sans(self):
self.assertEqual(self._call_cert('cert-idnsans.pem'),
self._get_idn_names())
def test_csr_no_sans(self):
self.assertEqual(self._call_csr('csr-nosans.pem'), [])
def test_csr_one_san(self):
self.assertEqual(self._call_csr('csr.pem'), ['example.com'])
def test_csr_two_sans(self):
self.assertEqual(self._call_csr('csr-san.pem'),
['example.com', 'www.example.com'])
def test_csr_six_sans(self):
self.assertEqual(self._call_csr('csr-6sans.pem'),
['example.com', 'example.org', 'example.net',
'example.info', 'subdomain.example.com',
'other.subdomain.example.com'])
def test_csr_hundred_sans(self):
self.assertEqual(self._call_csr('csr-100sans.pem'),
['example{0}.com'.format(i) for i in range(1, 101)])
def test_csr_idn_sans(self):
self.assertEqual(self._call_csr('csr-idnsans.pem'),
self._get_idn_names())
def test_critical_san(self):
self.assertEqual(self._call_cert('critical-san.pem'),
['chicago-cubs.venafi.example', 'cubs.venafi.example'])
class RandomSnTest(unittest.TestCase):
"""Test for random certificate serial numbers."""
def setUp(self):
self.cert_count = 5
self.serial_num = [] # type: List[int]
self.key = OpenSSL.crypto.PKey()
self.key.generate_key(OpenSSL.crypto.TYPE_RSA, 2048)
def test_sn_collisions(self):
from acme.crypto_util import gen_ss_cert
for _ in range(self.cert_count):
cert = gen_ss_cert(self.key, ['dummy'], force_san=True)
self.serial_num.append(cert.get_serial_number())
self.assertTrue(len(set(self.serial_num)) > 1)
class MakeCSRTest(unittest.TestCase):
"""Test for standalone functions."""
@classmethod
def _call_with_key(cls, *args, **kwargs):
privkey = OpenSSL.crypto.PKey()
privkey.generate_key(OpenSSL.crypto.TYPE_RSA, 2048)
privkey_pem = OpenSSL.crypto.dump_privatekey(OpenSSL.crypto.FILETYPE_PEM, privkey)
from acme.crypto_util import make_csr
return make_csr(privkey_pem, *args, **kwargs)
def test_make_csr(self):
csr_pem = self._call_with_key(["a.example", "b.example"])
self.assertTrue(b'--BEGIN CERTIFICATE REQUEST--' in csr_pem)
self.assertTrue(b'--END CERTIFICATE REQUEST--' in csr_pem)
csr = OpenSSL.crypto.load_certificate_request(
OpenSSL.crypto.FILETYPE_PEM, csr_pem)
# In pyopenssl 0.13 (used with TOXENV=py27-oldest), csr objects don't
# have a get_extensions() method, so we skip this test if the method
# isn't available.
if hasattr(csr, 'get_extensions'):
self.assertEqual(len(csr.get_extensions()), 1)
self.assertEqual(csr.get_extensions()[0].get_data(),
OpenSSL.crypto.X509Extension(
b'subjectAltName',
critical=False,
value=b'DNS:a.example, DNS:b.example',
).get_data(),
)
def test_make_csr_must_staple(self):
csr_pem = self._call_with_key(["a.example"], must_staple=True)
csr = OpenSSL.crypto.load_certificate_request(
OpenSSL.crypto.FILETYPE_PEM, csr_pem)
# In pyopenssl 0.13 (used with TOXENV=py27-oldest), csr objects don't
# have a get_extensions() method, so we skip this test if the method
# isn't available.
if hasattr(csr, 'get_extensions'):
self.assertEqual(len(csr.get_extensions()), 2)
# NOTE: Ideally we would filter by the TLS Feature OID, but
# OpenSSL.crypto.X509Extension doesn't give us the extension's raw OID,
# and the shortname field is just "UNDEF"
must_staple_exts = [e for e in csr.get_extensions()
if e.get_data() == b"0\x03\x02\x01\x05"]
self.assertEqual(len(must_staple_exts), 1,
"Expected exactly one Must Staple extension")
class DumpPyopensslChainTest(unittest.TestCase):
"""Test for dump_pyopenssl_chain."""
@classmethod
def _call(cls, loaded):
# pylint: disable=protected-access
from acme.crypto_util import dump_pyopenssl_chain
return dump_pyopenssl_chain(loaded)
def test_dump_pyopenssl_chain(self):
names = ['cert.pem', 'cert-san.pem', 'cert-idnsans.pem']
loaded = [test_util.load_cert(name) for name in names]
length = sum(
len(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, cert))
for cert in loaded)
self.assertEqual(len(self._call(loaded)), length)
def test_dump_pyopenssl_chain_wrapped(self):
names = ['cert.pem', 'cert-san.pem', 'cert-idnsans.pem']
loaded = [test_util.load_cert(name) for name in names]
wrap_func = jose.ComparableX509
wrapped = [wrap_func(cert) for cert in loaded]
dump_func = OpenSSL.crypto.dump_certificate
length = sum(len(dump_func(OpenSSL.crypto.FILETYPE_PEM, cert)) for cert in loaded)
self.assertEqual(len(self._call(wrapped)), length)
if __name__ == '__main__':
unittest.main() # pragma: no cover
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