"""Tests for acme.crypto_util."""
import ipaddress
import itertools
import socket
import socketserver
import sys
import threading
import time
from typing import List
import unittest
from unittest import mock
import warnings
import pytest
from cryptography import x509
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import rsa, x25519
from acme import errors
from acme._internal.tests import test_util
class FormatTest(unittest.TestCase):
def test_to_cryptography_encoding(self):
from acme.crypto_util import Format
assert Format.DER.to_cryptography_encoding() == serialization.Encoding.DER
assert Format.PEM.to_cryptography_encoding() == serialization.Encoding.PEM
class SSLSocketAndProbeSNITest(unittest.TestCase):
"""Tests for acme.crypto_util.SSLSocket/probe_sni."""
def setUp(self):
self.cert = test_util.load_cert('rsa2048_cert.pem')
key = test_util.load_pyopenssl_private_key('rsa2048_key.pem')
# pylint: disable=protected-access
certs = {b'foo': (key, self.cert)}
from acme.crypto_util import SSLSocket
class _TestServer(socketserver.TCPServer):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.socket = SSLSocket(self.socket, certs)
self.server = _TestServer(('', 0), socketserver.BaseRequestHandler)
self.port = self.server.socket.getsockname()[1]
self.server_thread = threading.Thread(
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
self.server.server_close()
def _probe(self, name):
from acme.crypto_util import probe_sni
return 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()
assert self.cert == self._probe(b'foo')
def test_probe_not_recognized_name(self):
self._start_server()
with pytest.raises(errors.Error):
self._probe(b'bar')
def test_probe_connection_error(self):
self.server.server_close()
original_timeout = socket.getdefaulttimeout()
try:
socket.setdefaulttimeout(1)
with pytest.raises(errors.Error):
self._probe(b'bar')
finally:
socket.setdefaulttimeout(original_timeout)
class SSLSocketTest(unittest.TestCase):
"""Tests for acme.crypto_util.SSLSocket."""
def test_ssl_socket_invalid_arguments(self):
from acme.crypto_util import SSLSocket
with pytest.raises(ValueError):
_ = SSLSocket(None, {'sni': ('key', 'cert')},
cert_selection=lambda _: None)
with pytest.raises(ValueError):
_ = SSLSocket(None)
class MiscTests(unittest.TestCase):
def test_dump_cryptography_chain(self):
from acme.crypto_util import dump_cryptography_chain
cert1 = test_util.load_cert('rsa2048_cert.pem')
cert2 = test_util.load_cert('rsa4096_cert.pem')
chain = [cert1, cert2]
dumped = dump_cryptography_chain(chain)
# default is PEM encoding Encoding.PEM
assert isinstance(dumped, bytes)
class CryptographyCertOrReqSANTest(unittest.TestCase):
"""Test for acme.crypto_util._cryptography_cert_or_req_san."""
@classmethod
def _call(cls, loader, name):
# pylint: disable=protected-access
from acme.crypto_util import _cryptography_cert_or_req_san
return _cryptography_cert_or_req_san(loader(name))
@classmethod
def _get_idn_names(cls):
"""Returns expected names from '{cert,csr}-idnsans.pem'."""
chars = [chr(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):
assert self._call_cert('cert.pem') == []
def test_cert_two_sans(self):
assert self._call_cert('cert-san.pem') == \
['example.com', 'www.example.com']
def test_cert_hundred_sans(self):
assert self._call_cert('cert-100sans.pem') == \
['example{0}.com'.format(i) for i in range(1, 101)]
def test_cert_idn_sans(self):
assert self._call_cert('cert-idnsans.pem') == \
self._get_idn_names()
def test_csr_no_sans(self):
assert self._call_csr('csr-nosans.pem') == []
def test_csr_one_san(self):
assert self._call_csr('csr.pem') == ['example.com']
def test_csr_two_sans(self):
assert self._call_csr('csr-san.pem') == \
['example.com', 'www.example.com']
def test_csr_six_sans(self):
assert 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):
assert self._call_csr('csr-100sans.pem') == \
['example{0}.com'.format(i) for i in range(1, 101)]
def test_csr_idn_sans(self):
assert self._call_csr('csr-idnsans.pem') == \
self._get_idn_names()
def test_critical_san(self):
assert self._call_cert('critical-san.pem') == \
['chicago-cubs.venafi.example', 'cubs.venafi.example']
class GenMakeSelfSignedCertTest(unittest.TestCase):
"""Test for make_self_signed_cert."""
def setUp(self):
self.cert_count = 5
self.serial_num: List[int] = []
self.privkey = rsa.generate_private_key(public_exponent=65537, key_size=2048)
def test_sn_collisions(self):
from acme.crypto_util import make_self_signed_cert
for _ in range(self.cert_count):
cert = make_self_signed_cert(self.privkey, ['dummy'], force_san=True,
ips=[ipaddress.ip_address("10.10.10.10")])
self.serial_num.append(cert.serial_number)
assert len(set(self.serial_num)) >= self.cert_count
def test_no_ips(self):
from acme.crypto_util import make_self_signed_cert
cert = make_self_signed_cert(self.privkey, ['dummy'])
@mock.patch("acme.crypto_util._now")
def test_expiry_times(self, mock_now):
from acme.crypto_util import make_self_signed_cert
from datetime import datetime, timedelta, timezone
not_before = 1736200830
validity = 100
not_before_dt = datetime.fromtimestamp(not_before)
validity_td = timedelta(validity)
not_after_dt = not_before_dt + validity_td
cert = make_self_signed_cert(
self.privkey,
['dummy'],
not_before=not_before_dt,
validity=validity_td,
)
# TODO: This should be `not_valid_before_utc` once we raise the minimum
# cryptography version.
# https://github.com/certbot/certbot/issues/10105
with warnings.catch_warnings():
warnings.filterwarnings(
'ignore',
message='Properties that return.*datetime object'
)
self.assertEqual(cert.not_valid_before, not_before_dt)
self.assertEqual(cert.not_valid_after, not_after_dt)
now = not_before + 1
now_dt = datetime.fromtimestamp(now)
mock_now.return_value = now_dt.replace(tzinfo=timezone.utc)
valid_after_now_dt = now_dt + validity_td
cert = make_self_signed_cert(
self.privkey,
['dummy'],
validity=validity_td,
)
with warnings.catch_warnings():
warnings.filterwarnings(
'ignore',
message='Properties that return.*datetime object'
)
self.assertEqual(cert.not_valid_before, now_dt)
self.assertEqual(cert.not_valid_after, valid_after_now_dt)
def test_no_name(self):
from acme.crypto_util import make_self_signed_cert
with pytest.raises(AssertionError):
make_self_signed_cert(self.privkey, ips=[ipaddress.ip_address("1.1.1.1")])
make_self_signed_cert(self.privkey)
def test_extensions(self):
from acme.crypto_util import make_self_signed_cert
extension_type = x509.TLSFeature([x509.TLSFeatureType.status_request])
extension = x509.Extension(
x509.TLSFeature.oid,
False,
extension_type
)
cert = make_self_signed_cert(
self.privkey,
ips=[ipaddress.ip_address("1.1.1.1")],
extensions=[extension]
)
self.assertIn(extension, cert.extensions)
class MakeCSRTest(unittest.TestCase):
"""Test for standalone functions."""
@classmethod
def _call_with_key(cls, *args, **kwargs):
privkey = rsa.generate_private_key(public_exponent=65537, key_size=2048)
privkey_pem = privkey.private_bytes(
serialization.Encoding.PEM,
serialization.PrivateFormat.PKCS8,
serialization.NoEncryption(),
)
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"])
assert b"--BEGIN CERTIFICATE REQUEST--" in csr_pem
assert b"--END CERTIFICATE REQUEST--" in csr_pem
csr = x509.load_pem_x509_csr(csr_pem)
assert len(csr.extensions) == 1
assert list(
csr.extensions.get_extension_for_class(x509.SubjectAlternativeName).value
) == [
x509.DNSName("a.example"),
x509.DNSName("b.example"),
]
def test_make_csr_ip(self):
csr_pem = self._call_with_key(
["a.example"],
False,
[ipaddress.ip_address("127.0.0.1"), ipaddress.ip_address("::1")],
)
assert b"--BEGIN CERTIFICATE REQUEST--" in csr_pem
assert b"--END CERTIFICATE REQUEST--" in csr_pem
csr = x509.load_pem_x509_csr(csr_pem)
assert len(csr.extensions) == 1
assert list(
csr.extensions.get_extension_for_class(x509.SubjectAlternativeName).value
) == [
x509.DNSName("a.example"),
x509.IPAddress(ipaddress.ip_address("127.0.0.1")),
x509.IPAddress(ipaddress.ip_address("::1")),
]
def test_make_csr_must_staple(self):
csr_pem = self._call_with_key(["a.example"], must_staple=True)
csr = x509.load_pem_x509_csr(csr_pem)
assert len(csr.extensions) == 2
assert list(csr.extensions.get_extension_for_class(x509.TLSFeature).value) == [
x509.TLSFeatureType.status_request
]
def test_make_csr_without_hostname(self):
with pytest.raises(ValueError):
self._call_with_key()
def test_make_csr_invalid_key_type(self):
privkey = x25519.X25519PrivateKey.generate()
privkey_pem = privkey.private_bytes(
serialization.Encoding.PEM,
serialization.PrivateFormat.PKCS8,
serialization.NoEncryption(),
)
from acme.crypto_util import make_csr
with pytest.raises(ValueError):
make_csr(privkey_pem, ["a.example"])
if __name__ == '__main__':
sys.exit(pytest.main(sys.argv[1:] + [__file__])) # pragma: no cover
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