Remove TLS-SNI objects in ACME (#7535)

* fixes #7214

* update changelog

* remove unused import

CHANGELOG.md

@@ -12,6 +12,9 @@ Certbot adheres to [Semantic Versioning](https://semver.org/).
 
 * Certbot's `config_changes` subcommand has been removed
 * `certbot.plugins.common.TLSSNI01` has been removed.
+* Deprecated attributes related to the TLS-SNI-01 challenge in
+  `acme.challenges` and `acme.standalone`
+  have been removed.
 * The functions `certbot.client.view_config_changes`,
   `certbot.main.config_changes`,
   `certbot.plugins.common.Installer.view_config_changes`,

acme/acme/__init__.py

@@ -21,30 +21,3 @@ for mod in list(sys.modules):
     # preserved (acme.jose.* is josepy.*)
     if mod == 'josepy' or mod.startswith('josepy.'):
         sys.modules['acme.' + mod.replace('josepy', 'jose', 1)] = sys.modules[mod]
-
-
-# This class takes a similar approach to the cryptography project to deprecate attributes
-# in public modules. See the _ModuleWithDeprecation class here:
-# https://github.com/pyca/cryptography/blob/91105952739442a74582d3e62b3d2111365b0dc7/src/cryptography/utils.py#L129
-class _TLSSNI01DeprecationModule(object):
-    """
-    Internal class delegating to a module, and displaying warnings when
-    attributes related to TLS-SNI-01 are accessed.
-    """
-    def __init__(self, module):
-        self.__dict__['_module'] = module
-
-    def __getattr__(self, attr):
-        if 'TLSSNI01' in attr or attr == 'BaseRequestHandlerWithLogging':
-            warnings.warn('{0} attribute is deprecated, and will be removed soon.'.format(attr),
-                          DeprecationWarning, stacklevel=2)
-        return getattr(self._module, attr)
-
-    def __setattr__(self, attr, value):  # pragma: no cover
-        setattr(self._module, attr, value)
-
-    def __delattr__(self, attr):  # pragma: no cover
-        delattr(self._module, attr)
-
-    def __dir__(self):  # pragma: no cover
-        return ['_module'] + dir(self._module)

acme/acme/challenges.py

@@ -3,19 +3,13 @@ import abc
 import functools
 import hashlib
 import logging
-import socket
-import sys
 
 from cryptography.hazmat.primitives import hashes  # type: ignore
 import josepy as jose
-import OpenSSL
 import requests
 import six
 
-from acme import errors
-from acme import crypto_util
 from acme import fields
-from acme import _TLSSNI01DeprecationModule
 
 logger = logging.getLogger(__name__)
 
@@ -367,148 +361,6 @@ class HTTP01(KeyAuthorizationChallenge):
         return self.key_authorization(account_key)
 
 
-@ChallengeResponse.register
-class TLSSNI01Response(KeyAuthorizationChallengeResponse):
-    """ACME tls-sni-01 challenge response."""
-    typ = "tls-sni-01"
-
-    DOMAIN_SUFFIX = b".acme.invalid"
-    """Domain name suffix."""
-
-    PORT = 443
-    """Verification port as defined by the protocol.
-
-    You can override it (e.g. for testing) by passing ``port`` to
-    `simple_verify`.
-
-    """
-
-    @property
-    def z(self):  # pylint: disable=invalid-name
-        """``z`` value used for verification.
-
-        :rtype bytes:
-
-        """
-        return hashlib.sha256(
-            self.key_authorization.encode("utf-8")).hexdigest().lower().encode()
-
-    @property
-    def z_domain(self):
-        """Domain name used for verification, generated from `z`.
-
-        :rtype bytes:
-
-        """
-        return self.z[:32] + b'.' + self.z[32:] + self.DOMAIN_SUFFIX
-
-    def gen_cert(self, key=None, bits=2048):
-        """Generate tls-sni-01 certificate.
-
-        :param OpenSSL.crypto.PKey key: Optional private key used in
-            certificate generation. If not provided (``None``), then
-            fresh key will be generated.
-        :param int bits: Number of bits for newly generated key.
-
-        :rtype: `tuple` of `OpenSSL.crypto.X509` and `OpenSSL.crypto.PKey`
-
-        """
-        if key is None:
-            key = OpenSSL.crypto.PKey()
-            key.generate_key(OpenSSL.crypto.TYPE_RSA, bits)
-        return crypto_util.gen_ss_cert(key, [
-            # z_domain is too big to fit into CN, hence first dummy domain
-            'dummy', self.z_domain.decode()], force_san=True), key
-
-    def probe_cert(self, domain, **kwargs):
-        """Probe tls-sni-01 challenge certificate.
-
-        :param unicode domain:
-
-        """
-        # TODO: domain is not necessary if host is provided
-        if "host" not in kwargs:
-            host = socket.gethostbyname(domain)
-            logger.debug('%s resolved to %s', domain, host)
-            kwargs["host"] = host
-
-        kwargs.setdefault("port", self.PORT)
-        kwargs["name"] = self.z_domain
-        # TODO: try different methods?
-        return crypto_util.probe_sni(**kwargs)
-
-    def verify_cert(self, cert):
-        """Verify tls-sni-01 challenge certificate.
-
-        :param OpensSSL.crypto.X509 cert: Challenge certificate.
-
-        :returns: Whether the certificate was successfully verified.
-        :rtype: bool
-
-        """
-        # pylint: disable=protected-access
-        sans = crypto_util._pyopenssl_cert_or_req_san(cert)
-        logger.debug('Certificate %s. SANs: %s', cert.digest('sha256'), sans)
-        return self.z_domain.decode() in sans
-
-    def simple_verify(self, chall, domain, account_public_key,
-                      cert=None, **kwargs):
-        """Simple verify.
-
-        Verify ``validation`` using ``account_public_key``, optionally
-        probe tls-sni-01 certificate and check using `verify_cert`.
-
-        :param .challenges.TLSSNI01 chall: Corresponding challenge.
-        :param str domain: Domain name being validated.
-        :param JWK account_public_key:
-        :param OpenSSL.crypto.X509 cert: Optional certificate. If not
-            provided (``None``) certificate will be retrieved using
-            `probe_cert`.
-        :param int port: Port used to probe the certificate.
-
-
-        :returns: ``True`` iff client's control of the domain has been
-            verified.
-        :rtype: bool
-
-        """
-        if not self.verify(chall, account_public_key):
-            logger.debug("Verification of key authorization in response failed")
-            return False
-
-        if cert is None:
-            try:
-                cert = self.probe_cert(domain=domain, **kwargs)
-            except errors.Error as error:
-                logger.debug(str(error), exc_info=True)
-                return False
-
-        return self.verify_cert(cert)
-
-
-@Challenge.register  # pylint: disable=too-many-ancestors
-class TLSSNI01(KeyAuthorizationChallenge):
-    """ACME tls-sni-01 challenge."""
-    response_cls = TLSSNI01Response
-    typ = response_cls.typ
-
-    # boulder#962, ietf-wg-acme#22
-    #n = jose.Field("n", encoder=int, decoder=int)
-
-    def validation(self, account_key, **kwargs):
-        """Generate validation.
-
-        :param JWK account_key:
-        :param OpenSSL.crypto.PKey cert_key: Optional private key used
-            in certificate generation. If not provided (``None``), then
-            fresh key will be generated.
-
-        :rtype: `tuple` of `OpenSSL.crypto.X509` and `OpenSSL.crypto.PKey`
-
-        """
-        return self.response(account_key).gen_cert(key=kwargs.get('cert_key'))
-
-
 @ChallengeResponse.register
 class TLSALPN01Response(KeyAuthorizationChallengeResponse):
     """ACME TLS-ALPN-01 challenge response.
@@ -617,7 +469,3 @@ class DNSResponse(ChallengeResponse):
 
         """
         return chall.check_validation(self.validation, account_public_key)
-
-
-# Patching ourselves to warn about TLS-SNI challenge deprecation and removal.
-sys.modules[__name__] = _TLSSNI01DeprecationModule(sys.modules[__name__])

acme/acme/challenges_test.py

@@ -3,12 +3,10 @@ import unittest
 
 import josepy as jose
 import mock
-import OpenSSL
 import requests
 
 from six.moves.urllib import parse as urllib_parse  # pylint: disable=relative-import
 
-from acme import errors
 from acme import test_util
 
 CERT = test_util.load_comparable_cert('cert.pem')
@@ -259,150 +257,6 @@ class HTTP01Test(unittest.TestCase):
             self.msg.update(token=b'..').good_token)
 
 
-class TLSSNI01ResponseTest(unittest.TestCase):
-    # pylint: disable=too-many-instance-attributes
-
-    def setUp(self):
-        from acme.challenges import TLSSNI01
-        self.chall = TLSSNI01(
-            token=jose.b64decode(b'a82d5ff8ef740d12881f6d3c2277ab2e'))
-
-        self.response = self.chall.response(KEY)
-        self.jmsg = {
-            'resource': 'challenge',
-            'type': 'tls-sni-01',
-            'keyAuthorization': self.response.key_authorization,
-        }
-
-        # pylint: disable=invalid-name
-        label1 = b'dc38d9c3fa1a4fdcc3a5501f2d38583f'
-        label2 = b'b7793728f084394f2a1afd459556bb5c'
-        self.z = label1 + label2
-        self.z_domain = label1 + b'.' + label2 + b'.acme.invalid'
-        self.domain = 'foo.com'
-
-    def test_z_and_domain(self):
-        self.assertEqual(self.z, self.response.z)
-        self.assertEqual(self.z_domain, self.response.z_domain)
-
-    def test_to_partial_json(self):
-        self.assertEqual({k: v for k, v in self.jmsg.items() if k != 'keyAuthorization'},
-                         self.response.to_partial_json())
-
-    def test_from_json(self):
-        from acme.challenges import TLSSNI01Response
-        self.assertEqual(self.response, TLSSNI01Response.from_json(self.jmsg))
-
-    def test_from_json_hashable(self):
-        from acme.challenges import TLSSNI01Response
-        hash(TLSSNI01Response.from_json(self.jmsg))
-
-    @mock.patch('acme.challenges.socket.gethostbyname')
-    @mock.patch('acme.challenges.crypto_util.probe_sni')
-    def test_probe_cert(self, mock_probe_sni, mock_gethostbyname):
-        mock_gethostbyname.return_value = '127.0.0.1'
-        self.response.probe_cert('foo.com')
-        mock_gethostbyname.assert_called_once_with('foo.com')
-        mock_probe_sni.assert_called_once_with(
-            host='127.0.0.1', port=self.response.PORT,
-            name=self.z_domain)
-
-        self.response.probe_cert('foo.com', host='8.8.8.8')
-        mock_probe_sni.assert_called_with(
-            host='8.8.8.8', port=mock.ANY, name=mock.ANY)
-
-        self.response.probe_cert('foo.com', port=1234)
-        mock_probe_sni.assert_called_with(
-            host=mock.ANY, port=1234, name=mock.ANY)
-
-        self.response.probe_cert('foo.com', bar='baz')
-        mock_probe_sni.assert_called_with(
-            host=mock.ANY, port=mock.ANY, name=mock.ANY, bar='baz')
-
-        self.response.probe_cert('foo.com', name=b'xxx')
-        mock_probe_sni.assert_called_with(
-            host=mock.ANY, port=mock.ANY,
-            name=self.z_domain)
-
-    def test_gen_verify_cert(self):
-        key1 = test_util.load_pyopenssl_private_key('rsa512_key.pem')
-        cert, key2 = self.response.gen_cert(key1)
-        self.assertEqual(key1, key2)
-        self.assertTrue(self.response.verify_cert(cert))
-
-    def test_gen_verify_cert_gen_key(self):
-        cert, key = self.response.gen_cert()
-        self.assertTrue(isinstance(key, OpenSSL.crypto.PKey))
-        self.assertTrue(self.response.verify_cert(cert))
-
-    def test_verify_bad_cert(self):
-        self.assertFalse(self.response.verify_cert(
-            test_util.load_cert('cert.pem')))
-
-    def test_simple_verify_bad_key_authorization(self):
-        key2 = jose.JWKRSA.load(test_util.load_vector('rsa256_key.pem'))
-        self.response.simple_verify(self.chall, "local", key2.public_key())
-
-    @mock.patch('acme.challenges.TLSSNI01Response.verify_cert', autospec=True)
-    def test_simple_verify(self, mock_verify_cert):
-        mock_verify_cert.return_value = mock.sentinel.verification
-        self.assertEqual(
-            mock.sentinel.verification, self.response.simple_verify(
-                self.chall, self.domain, KEY.public_key(),
-                cert=mock.sentinel.cert))
-        mock_verify_cert.assert_called_once_with(
-            self.response, mock.sentinel.cert)
-
-    @mock.patch('acme.challenges.TLSSNI01Response.probe_cert')
-    def test_simple_verify_false_on_probe_error(self, mock_probe_cert):
-        mock_probe_cert.side_effect = errors.Error
-        self.assertFalse(self.response.simple_verify(
-            self.chall, self.domain, KEY.public_key()))
-
-
-class TLSSNI01Test(unittest.TestCase):
-
-    def setUp(self):
-        self.jmsg = {
-            'type': 'tls-sni-01',
-            'token': 'a82d5ff8ef740d12881f6d3c2277ab2e',
-        }
-        from acme.challenges import TLSSNI01
-        self.msg = TLSSNI01(
-            token=jose.b64decode('a82d5ff8ef740d12881f6d3c2277ab2e'))
-
-    def test_to_partial_json(self):
-        self.assertEqual(self.jmsg, self.msg.to_partial_json())
-
-    def test_from_json(self):
-        from acme.challenges import TLSSNI01
-        self.assertEqual(self.msg, TLSSNI01.from_json(self.jmsg))
-
-    def test_from_json_hashable(self):
-        from acme.challenges import TLSSNI01
-        hash(TLSSNI01.from_json(self.jmsg))
-
-    def test_from_json_invalid_token_length(self):
-        from acme.challenges import TLSSNI01
-        self.jmsg['token'] = jose.encode_b64jose(b'abcd')
-        self.assertRaises(
-            jose.DeserializationError, TLSSNI01.from_json, self.jmsg)
-
-    @mock.patch('acme.challenges.TLSSNI01Response.gen_cert')
-    def test_validation(self, mock_gen_cert):
-        mock_gen_cert.return_value = ('cert', 'key')
-        self.assertEqual(('cert', 'key'), self.msg.validation(
-            KEY, cert_key=mock.sentinel.cert_key))
-        mock_gen_cert.assert_called_once_with(key=mock.sentinel.cert_key)
-
-    def test_deprecation_message(self):
-        with mock.patch('acme.warnings.warn') as mock_warn:
-            from acme.challenges import TLSSNI01
-            assert TLSSNI01
-        self.assertEqual(mock_warn.call_count, 1)
-        self.assertTrue('deprecated' in mock_warn.call_args[0][0])
-
-
 class TLSALPN01ResponseTest(unittest.TestCase):
     # pylint: disable=too-many-instance-attributes
 

acme/acme/standalone.py

@@ -1,24 +1,17 @@
 """Support for standalone client challenge solvers. """
-import argparse
 import collections
 import functools
 import logging
-import os
 import socket
-import sys
 import threading
-import warnings
 
 from six.moves import BaseHTTPServer  # type: ignore  # pylint: disable=import-error
 from six.moves import http_client  # pylint: disable=import-error
 from six.moves import socketserver  # type: ignore  # pylint: disable=import-error
 
-import OpenSSL
-
 from acme import challenges
 from acme import crypto_util
 from acme.magic_typing import List # pylint: disable=unused-import, no-name-in-module
-from acme import _TLSSNI01DeprecationModule
 
 
 logger = logging.getLogger(__name__)
@@ -133,35 +126,6 @@ class BaseDualNetworkedServers(object):
         self.threads = []
 
 
-class TLSSNI01Server(TLSServer, ACMEServerMixin):
-    """TLSSNI01 Server."""
-
-    def __init__(self, server_address, certs, ipv6=False):
-        TLSServer.__init__(
-            self, server_address, BaseRequestHandlerWithLogging, certs=certs, ipv6=ipv6)
-
-
-class TLSSNI01DualNetworkedServers(BaseDualNetworkedServers):
-    """TLSSNI01Server Wrapper. Tries everything for both. Failures for one don't
-       affect the other."""
-
-    def __init__(self, *args, **kwargs):
-        BaseDualNetworkedServers.__init__(self, TLSSNI01Server, *args, **kwargs)
-
-
-class BaseRequestHandlerWithLogging(socketserver.BaseRequestHandler):
-    """BaseRequestHandler with logging."""
-
-    def log_message(self, format, *args):  # pylint: disable=redefined-builtin
-        """Log arbitrary message."""
-        logger.debug("%s - - %s", self.client_address[0], format % args)
-
-    def handle(self):
-        """Handle request."""
-        self.log_message("Incoming request")
-        socketserver.BaseRequestHandler.handle(self)
-
-
 class HTTPServer(BaseHTTPServer.HTTPServer):
     """Generic HTTP Server."""
 
@@ -264,42 +228,3 @@ class HTTP01RequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
         """
         return functools.partial(
             cls, simple_http_resources=simple_http_resources)
-
-
-def simple_tls_sni_01_server(cli_args, forever=True):
-    """Run simple standalone TLSSNI01 server."""
-    warnings.warn(
-        'simple_tls_sni_01_server is deprecated and will be removed soon.',
-        DeprecationWarning, stacklevel=2)
-    logging.basicConfig(level=logging.DEBUG)
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "-p", "--port", default=0, help="Port to serve at. By default "
-        "picks random free port.")
-    args = parser.parse_args(cli_args[1:])
-
-    certs = {}
-
-    _, hosts, _ = next(os.walk('.')) # type: ignore # https://github.com/python/mypy/issues/465
-    for host in hosts:
-        with open(os.path.join(host, "cert.pem")) as cert_file:
-            cert_contents = cert_file.read()
-        with open(os.path.join(host, "key.pem")) as key_file:
-            key_contents = key_file.read()
-        certs[host.encode()] = (
-            OpenSSL.crypto.load_privatekey(
-                OpenSSL.crypto.FILETYPE_PEM, key_contents),
-            OpenSSL.crypto.load_certificate(
-                OpenSSL.crypto.FILETYPE_PEM, cert_contents))
-
-    server = TLSSNI01Server(('', int(args.port)), certs=certs)
-    logger.info("Serving at https://%s:%s...", *server.socket.getsockname()[:2])
-    if forever:  # pragma: no cover
-        server.serve_forever()
-    else:
-        server.handle_request()
-
-
-# Patching ourselves to warn about TLS-SNI challenge deprecation and removal.
-sys.modules[__name__] = _TLSSNI01DeprecationModule(sys.modules[__name__])

acme/acme/standalone_test.py

@@ -1,14 +1,7 @@
 """Tests for acme.standalone."""
-import multiprocessing
-import os
-import shutil
 import socket
 import threading
-import tempfile
 import unittest
-import warnings
-import time
-from contextlib import closing
 
 from six.moves import http_client  # pylint: disable=import-error
 from six.moves import socketserver  # type: ignore  # pylint: disable=import-error
@@ -18,8 +11,6 @@ import mock
 import requests
 
 from acme import challenges
-from acme import crypto_util
-from acme import errors
 from acme import test_util
 from acme.magic_typing import Set # pylint: disable=unused-import, no-name-in-module
 
@@ -42,44 +33,6 @@ class TLSServerTest(unittest.TestCase):
             server.server_close()
 
 
-class TLSSNI01ServerTest(unittest.TestCase):
-    """Test for acme.standalone.TLSSNI01Server."""
-
-
-    def setUp(self):
-        self.certs = {b'localhost': (
-            test_util.load_pyopenssl_private_key('rsa2048_key.pem'),
-            test_util.load_cert('rsa2048_cert.pem'),
-        )}
-        from acme.standalone import TLSSNI01Server
-        self.server = TLSSNI01Server(('localhost', 0), certs=self.certs)
-        self.thread = threading.Thread(target=self.server.serve_forever)
-        self.thread.start()
-
-    def tearDown(self):
-        self.server.shutdown()
-        self.thread.join()
-
-    def test_it(self):
-        host, port = self.server.socket.getsockname()[:2]
-        cert = crypto_util.probe_sni(
-            b'localhost', host=host, port=port, timeout=1)
-        self.assertEqual(jose.ComparableX509(cert),
-                         jose.ComparableX509(self.certs[b'localhost'][1]))
-
-
-class BaseRequestHandlerWithLoggingTest(unittest.TestCase):
-    """Test for acme.standalone.BaseRequestHandlerWithLogging."""
-
-    def test_it(self):
-        with mock.patch('acme.standalone.warnings.warn') as mock_warn:
-            # pylint: disable=unused-variable
-            from acme.standalone import BaseRequestHandlerWithLogging
-        self.assertTrue(mock_warn.called)
-        msg = mock_warn.call_args[0][0]
-        self.assertTrue(msg.startswith('BaseRequestHandlerWithLogging'))
-
-
 class HTTP01ServerTest(unittest.TestCase):
     """Tests for acme.standalone.HTTP01Server."""
 
@@ -183,33 +136,6 @@ class BaseDualNetworkedServersTest(unittest.TestCase):
             prev_port = port
 
 
-class TLSSNI01DualNetworkedServersTest(unittest.TestCase):
-    """Test for acme.standalone.TLSSNI01DualNetworkedServers."""
-
-
-    def setUp(self):
-        self.certs = {b'localhost': (
-            test_util.load_pyopenssl_private_key('rsa2048_key.pem'),
-            test_util.load_cert('rsa2048_cert.pem'),
-        )}
-        from acme.standalone import TLSSNI01DualNetworkedServers
-        self.servers = TLSSNI01DualNetworkedServers(('localhost', 0), certs=self.certs)
-        self.servers.serve_forever()
-
-    def tearDown(self):
-        self.servers.shutdown_and_server_close()
-
-    def test_connect(self):
-        socknames = self.servers.getsocknames()
-        # connect to all addresses
-        for sockname in socknames:
-            host, port = sockname[:2]
-            cert = crypto_util.probe_sni(
-                b'localhost', host=host, port=port, timeout=1)
-            self.assertEqual(jose.ComparableX509(cert),
-                             jose.ComparableX509(self.certs[b'localhost'][1]))
-
-
 class HTTP01DualNetworkedServersTest(unittest.TestCase):
     """Tests for acme.standalone.HTTP01DualNetworkedServers."""
 
@@ -260,66 +186,5 @@ class HTTP01DualNetworkedServersTest(unittest.TestCase):
         self.assertFalse(self._test_http01(add=False))
 
 
-class TestSimpleTLSSNI01Server(unittest.TestCase):
-    """Tests for acme.standalone.simple_tls_sni_01_server."""
-
-
-    def setUp(self):
-        # mirror ../examples/standalone
-        self.test_cwd = tempfile.mkdtemp()
-        localhost_dir = os.path.join(self.test_cwd, 'localhost')
-        os.makedirs(localhost_dir)
-        shutil.copy(test_util.vector_path('rsa2048_cert.pem'),
-                    os.path.join(localhost_dir, 'cert.pem'))
-        shutil.copy(test_util.vector_path('rsa2048_key.pem'),
-                    os.path.join(localhost_dir, 'key.pem'))
-
-        with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
-            sock.bind(('', 0))
-            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-            self.port = sock.getsockname()[1]
-
-        self.process = multiprocessing.Process(target=_simple_tls_sni_01_server_no_warnings,
-                                               args=(['path', '-p', str(self.port)],))
-        self.old_cwd = os.getcwd()
-        os.chdir(self.test_cwd)
-
-    def tearDown(self):
-        os.chdir(self.old_cwd)
-        if self.process.is_alive():
-            self.process.terminate()
-            self.process.join(timeout=5)
-            # Check that we didn't timeout waiting for the process to
-            # terminate.
-            self.assertNotEqual(self.process.exitcode, None)
-        shutil.rmtree(self.test_cwd)
-
-    @mock.patch('acme.standalone.TLSSNI01Server.handle_request')
-    def test_mock(self, handle):
-        _simple_tls_sni_01_server_no_warnings(cli_args=['path', '-p', str(self.port)],
-                                              forever=False)
-        self.assertEqual(handle.call_count, 1)
-
-    def test_live(self):
-        self.process.start()
-        cert = None
-        for _ in range(50):
-            time.sleep(0.1)
-            try:
-                cert = crypto_util.probe_sni(b'localhost', b'127.0.0.1', self.port)
-                break
-            except errors.Error:  # pragma: no cover
-                pass
-        self.assertEqual(jose.ComparableX509(cert),
-                         test_util.load_comparable_cert('rsa2048_cert.pem'))
-
-
-def _simple_tls_sni_01_server_no_warnings(*args, **kwargs):
-    with warnings.catch_warnings():
-        warnings.filterwarnings('ignore', 'simple_tls.*')
-        from acme.standalone import simple_tls_sni_01_server
-        return simple_tls_sni_01_server(*args, **kwargs)
-
-
 if __name__ == "__main__":
     unittest.main()  # pragma: no cover

acme/acme/test_util.py

@@ -12,12 +12,6 @@ import josepy as jose
 from OpenSSL import crypto
 
 
-def vector_path(*names):
-    """Path to a test vector."""
-    return pkg_resources.resource_filename(
-        __name__, os.path.join('testdata', *names))
-
-
 def load_vector(*names):
     """Load contents of a test vector."""
     # luckily, resource_string opens file in binary mode

pytest.ini

@@ -13,7 +13,6 @@
 filterwarnings =
     error
     ignore:decodestring:DeprecationWarning
-    ignore:(TLSSNI01|TLS-SNI-01):DeprecationWarning
     ignore:.*collections\.abc:DeprecationWarning
     ignore:The `color_scheme` argument is deprecated:DeprecationWarning:IPython.*
     ignore:.*get_systemd_os_info:DeprecationWarning