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"""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
import josepy as jose
import OpenSSL
import pytest
from acme import errors
from acme._internal.tests import test_util
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):
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 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()
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 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):
assert self._call_cert('cert-nocn.der') == \
['no-common-name.badssl.com']
def test_cert_no_sans_yes_common(self):
assert self._call_cert('cert.pem') == ['example.com']
def test_cert_two_sans_yes_common(self):
assert 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 = [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 PyOpenSSLCertOrReqSANIPTest(unittest.TestCase):
"""Test for acme.crypto_util._pyopenssl_cert_or_req_san_ip."""
@classmethod
def _call(cls, loader, name):
# pylint: disable=protected-access
from acme.crypto_util import _pyopenssl_cert_or_req_san_ip
return _pyopenssl_cert_or_req_san_ip(loader(name))
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_csr_no_sans(self):
assert self._call_csr('csr-nosans.pem') == []
def test_cert_domain_sans(self):
assert self._call_cert('cert-san.pem') == []
def test_csr_domain_sans(self):
assert self._call_csr('csr-san.pem') == []
def test_cert_ip_two_sans(self):
assert self._call_cert('cert-ipsans.pem') == ['192.0.2.145', '203.0.113.1']
def test_csr_ip_two_sans(self):
assert self._call_csr('csr-ipsans.pem') == ['192.0.2.145', '203.0.113.1']
def test_csr_ipv6_sans(self):
assert self._call_csr('csr-ipv6sans.pem') == \
['0:0:0:0:0:0:0:1', 'A3BE:32F3:206E:C75D:956:CEE:9858:5EC5']
def test_cert_ipv6_sans(self):
assert self._call_cert('cert-ipv6sans.pem') == \
['0:0:0:0:0:0:0:1', 'A3BE:32F3:206E:C75D:956:CEE:9858:5EC5']
class GenSsCertTest(unittest.TestCase):
"""Test for gen_ss_cert (generation of self-signed cert)."""
def setUp(self):
self.cert_count = 5
self.serial_num: 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,
ips=[ipaddress.ip_address("10.10.10.10")])
self.serial_num.append(cert.get_serial_number())
assert len(set(self.serial_num)) >= self.cert_count
def test_no_name(self):
from acme.crypto_util import gen_ss_cert
with pytest.raises(AssertionError):
gen_ss_cert(self.key, ips=[ipaddress.ip_address("1.1.1.1")])
gen_ss_cert(self.key)
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"])
assert b'--BEGIN CERTIFICATE REQUEST--' in csr_pem
assert 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'):
assert len(csr.get_extensions()) == 1
assert 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_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 = 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'):
assert len(csr.get_extensions()) == 1
assert csr.get_extensions()[0].get_data() == \
OpenSSL.crypto.X509Extension(
b'subjectAltName',
critical=False,
value=b'DNS:a.example, IP:127.0.0.1, IP:::1',
).get_data()
# for IP san it's actually need to be octet-string,
# but somewhere downstream thankfully handle it for us
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'):
assert 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"]
assert len(must_staple_exts) == 1, \
"Expected exactly one Must Staple extension"
def test_make_csr_without_hostname(self):
with pytest.raises(ValueError):
self._call_with_key()
def test_make_csr_correct_version(self):
csr_pem = self._call_with_key(["a.example"])
csr = OpenSSL.crypto.load_certificate_request(
OpenSSL.crypto.FILETYPE_PEM, csr_pem)
assert csr.get_version() == 0, \
"Expected CSR version to be v1 (encoded as 0), per RFC 2986, section 4"
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)
assert 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)
assert len(self._call(wrapped)) == length
if __name__ == '__main__':
sys.exit(pytest.main(sys.argv[1:] + [__file__])) # pragma: no cover
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