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# Test the support for SSL and sockets
import contextlib
import sys
import unittest
import unittest.mock
from ast import literal_eval
from threading import Thread
from test import support
from test.support import import_helper
from test.support import os_helper
from test.support import socket_helper
from test.support import threading_helper
from test.support import warnings_helper
from test.support import asyncore
import array
import re
import socket
import select
import struct
import time
import enum
import gc
import http.client
import os
import errno
import pprint
import urllib.request
import threading
import traceback
import weakref
import platform
import sysconfig
import functools
from contextlib import nullcontext
try:
import ctypes
except ImportError:
ctypes = None
ssl = import_helper.import_module("ssl")
import _ssl
from ssl import Purpose, TLSVersion, _TLSContentType, _TLSMessageType, _TLSAlertType
Py_DEBUG_WIN32 = support.Py_DEBUG and sys.platform == 'win32'
PROTOCOLS = sorted(ssl._PROTOCOL_NAMES)
HOST = socket_helper.HOST
IS_AWS_LC = "AWS-LC" in ssl.OPENSSL_VERSION
IS_OPENSSL_3_0_0 = ssl.OPENSSL_VERSION_INFO >= (3, 0, 0)
CAN_GET_SELECTED_OPENSSL_GROUP = ssl.OPENSSL_VERSION_INFO >= (3, 2)
CAN_IGNORE_UNKNOWN_OPENSSL_GROUPS = ssl.OPENSSL_VERSION_INFO >= (3, 3)
CAN_GET_AVAILABLE_OPENSSL_GROUPS = ssl.OPENSSL_VERSION_INFO >= (3, 5)
CAN_GET_AVAILABLE_OPENSSL_SIGALGS = ssl.OPENSSL_VERSION_INFO >= (3, 4)
CAN_SET_CLIENT_SIGALGS = not IS_AWS_LC
CAN_IGNORE_UNKNOWN_OPENSSL_SIGALGS = ssl.OPENSSL_VERSION_INFO >= (3, 3)
CAN_GET_SELECTED_OPENSSL_SIGALG = ssl.OPENSSL_VERSION_INFO >= (3, 5)
PY_SSL_DEFAULT_CIPHERS = sysconfig.get_config_var('PY_SSL_DEFAULT_CIPHERS')
CAN_SET_KEYLOG = (os.name != "nt")
requires_keylog_setter = unittest.skipUnless(
CAN_SET_KEYLOG,
"cannot set 'keylog_filename' on Windows"
)
PROTOCOL_TO_TLS_VERSION = {}
for proto, ver in (
("PROTOCOL_SSLv3", "SSLv3"),
("PROTOCOL_TLSv1", "TLSv1"),
("PROTOCOL_TLSv1_1", "TLSv1_1"),
):
try:
proto = getattr(ssl, proto)
ver = getattr(ssl.TLSVersion, ver)
except AttributeError:
continue
PROTOCOL_TO_TLS_VERSION[proto] = ver
def data_file(*name):
return os.path.join(os.path.dirname(__file__), "certdata", *name)
# The custom key and certificate files used in test_ssl are generated
# using Lib/test/certdata/make_ssl_certs.py.
# Other certificates are simply fetched from the internet servers they
# are meant to authenticate.
CERTFILE = data_file("keycert.pem")
BYTES_CERTFILE = os.fsencode(CERTFILE)
ONLYCERT = data_file("ssl_cert.pem")
ONLYKEY = data_file("ssl_key.pem")
BYTES_ONLYCERT = os.fsencode(ONLYCERT)
BYTES_ONLYKEY = os.fsencode(ONLYKEY)
CERTFILE_PROTECTED = data_file("keycert.passwd.pem")
ONLYKEY_PROTECTED = data_file("ssl_key.passwd.pem")
KEY_PASSWORD = "somepass"
CAPATH = data_file("capath")
BYTES_CAPATH = os.fsencode(CAPATH)
CAFILE_NEURONIO = data_file("capath", "4e1295a3.0")
CAFILE_CACERT = data_file("capath", "5ed36f99.0")
with open(data_file('keycert.pem.reference')) as file:
CERTFILE_INFO = literal_eval(file.read())
# empty CRL
CRLFILE = data_file("revocation.crl")
# Two keys and certs signed by the same CA (for SNI tests)
SIGNED_CERTFILE = data_file("keycert3.pem")
SINGED_CERTFILE_ONLY = data_file("cert3.pem")
SIGNED_CERTFILE_HOSTNAME = 'localhost'
with open(data_file('keycert3.pem.reference')) as file:
SIGNED_CERTFILE_INFO = literal_eval(file.read())
SIGNED_CERTFILE2 = data_file("keycert4.pem")
SIGNED_CERTFILE2_HOSTNAME = 'fakehostname'
SIGNED_CERTFILE_ECC = data_file("keycertecc.pem")
SIGNED_CERTFILE_ECC_HOSTNAME = 'localhost-ecc'
# A custom testcase, extracted from `rfc5280::aki::leaf-missing-aki` in x509-limbo:
# The leaf (server) certificate has no AKI, which is forbidden under RFC 5280.
# See: https://x509-limbo.com/testcases/rfc5280/#rfc5280akileaf-missing-aki
LEAF_MISSING_AKI_CERTFILE = data_file("leaf-missing-aki.keycert.pem")
LEAF_MISSING_AKI_CERTFILE_HOSTNAME = "example.com"
LEAF_MISSING_AKI_CA = data_file("leaf-missing-aki.ca.pem")
# Same certificate as pycacert.pem, but without extra text in file
SIGNING_CA = data_file("capath", "ceff1710.0")
# cert with all kinds of subject alt names
ALLSANFILE = data_file("allsans.pem")
IDNSANSFILE = data_file("idnsans.pem")
NOSANFILE = data_file("nosan.pem")
NOSAN_HOSTNAME = 'localhost'
REMOTE_HOST = "self-signed.pythontest.net"
EMPTYCERT = data_file("nullcert.pem")
BADCERT = data_file("badcert.pem")
NONEXISTINGCERT = data_file("XXXnonexisting.pem")
NONEXISTINGKEY = data_file("XXXnonexistingkey.pem")
BADKEY = data_file("badkey.pem")
NOKIACERT = data_file("nokia.pem")
NULLBYTECERT = data_file("nullbytecert.pem")
TALOS_INVALID_CRLDP = data_file("talos-2019-0758.pem")
DHFILE = data_file("ffdh3072.pem")
BYTES_DHFILE = os.fsencode(DHFILE)
# Not defined in all versions of OpenSSL
OP_NO_COMPRESSION = getattr(ssl, "OP_NO_COMPRESSION", 0)
OP_SINGLE_DH_USE = getattr(ssl, "OP_SINGLE_DH_USE", 0)
OP_SINGLE_ECDH_USE = getattr(ssl, "OP_SINGLE_ECDH_USE", 0)
OP_CIPHER_SERVER_PREFERENCE = getattr(ssl, "OP_CIPHER_SERVER_PREFERENCE", 0)
OP_ENABLE_MIDDLEBOX_COMPAT = getattr(ssl, "OP_ENABLE_MIDDLEBOX_COMPAT", 0)
# Ubuntu has patched OpenSSL and changed behavior of security level 2
# see https://bugs.python.org/issue41561#msg389003
def is_ubuntu():
try:
# Assume that any references of "ubuntu" implies Ubuntu-like distro
# The workaround is not required for 18.04, but doesn't hurt either.
with open("/etc/os-release", encoding="utf-8") as f:
return "ubuntu" in f.read()
except FileNotFoundError:
return False
if is_ubuntu():
def seclevel_workaround(*ctxs):
"""Lower security level to '1' and allow all ciphers for TLS 1.0/1"""
for ctx in ctxs:
if (
hasattr(ctx, "minimum_version") and
ctx.minimum_version <= ssl.TLSVersion.TLSv1_1 and
ctx.security_level > 1
):
ctx.set_ciphers("@SECLEVEL=1:ALL")
else:
def seclevel_workaround(*ctxs):
pass
def has_tls_protocol(protocol):
"""Check if a TLS protocol is available and enabled
:param protocol: enum ssl._SSLMethod member or name
:return: bool
"""
if isinstance(protocol, str):
assert protocol.startswith('PROTOCOL_')
protocol = getattr(ssl, protocol, None)
if protocol is None:
return False
if protocol in {
ssl.PROTOCOL_TLS, ssl.PROTOCOL_TLS_SERVER,
ssl.PROTOCOL_TLS_CLIENT
}:
# auto-negotiate protocols are always available
return True
name = protocol.name
return has_tls_version(name[len('PROTOCOL_'):])
@functools.lru_cache
def has_tls_version(version):
"""Check if a TLS/SSL version is enabled
:param version: TLS version name or ssl.TLSVersion member
:return: bool
"""
if isinstance(version, str):
version = ssl.TLSVersion.__members__[version]
# check compile time flags like ssl.HAS_TLSv1_2
if not getattr(ssl, f'HAS_{version.name}'):
return False
if IS_OPENSSL_3_0_0 and version < ssl.TLSVersion.TLSv1_2:
# bpo43791: 3.0.0-alpha14 fails with TLSV1_ALERT_INTERNAL_ERROR
return False
# check runtime and dynamic crypto policy settings. A TLS version may
# be compiled in but disabled by a policy or config option.
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
if (
hasattr(ctx, 'minimum_version') and
ctx.minimum_version != ssl.TLSVersion.MINIMUM_SUPPORTED and
version < ctx.minimum_version
):
return False
if (
hasattr(ctx, 'maximum_version') and
ctx.maximum_version != ssl.TLSVersion.MAXIMUM_SUPPORTED and
version > ctx.maximum_version
):
return False
return True
def requires_tls_version(version):
"""Decorator to skip tests when a required TLS version is not available
:param version: TLS version name or ssl.TLSVersion member
:return:
"""
def decorator(func):
@functools.wraps(func)
def wrapper(*args, **kw):
if not has_tls_version(version):
raise unittest.SkipTest(f"{version} is not available.")
else:
return func(*args, **kw)
return wrapper
return decorator
def handle_error(prefix):
exc_format = ' '.join(traceback.format_exception(sys.exception()))
if support.verbose:
sys.stdout.write(prefix + exc_format)
def utc_offset(): #NOTE: ignore issues like #1647654
# local time = utc time + utc offset
if time.daylight and time.localtime().tm_isdst > 0:
return -time.altzone # seconds
return -time.timezone
ignore_deprecation = warnings_helper.ignore_warnings(
category=DeprecationWarning
)
def make_test_context(
*,
server_side=False,
check_hostname=None,
cert_reqs=ssl.CERT_NONE,
ca_certs=None, certfile=None, keyfile=None,
ciphers=None, ciphersuites=None,
min_version=None, max_version=None,
):
if server_side:
context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
else:
context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
if check_hostname is None:
if cert_reqs == ssl.CERT_NONE:
context.check_hostname = False
else:
context.check_hostname = check_hostname
if cert_reqs is not None:
context.verify_mode = cert_reqs
if ca_certs is not None:
context.load_verify_locations(ca_certs)
if certfile is not None or keyfile is not None:
context.load_cert_chain(certfile, keyfile)
if ciphers is not None:
context.set_ciphers(ciphers)
if ciphersuites is not None:
context.set_ciphersuites(ciphersuites)
if min_version is not None:
context.minimum_version = min_version
if max_version is not None:
context.maximum_version = max_version
return context
def test_wrap_socket(
sock,
*,
server_side=False,
check_hostname=None,
cert_reqs=ssl.CERT_NONE,
ca_certs=None, certfile=None, keyfile=None,
ciphers=None, ciphersuites=None,
min_version=None, max_version=None,
**kwargs,
):
context = make_test_context(
server_side=server_side,
check_hostname=check_hostname,
cert_reqs=cert_reqs,
ca_certs=ca_certs, certfile=certfile, keyfile=keyfile,
ciphers=ciphers, ciphersuites=ciphersuites,
min_version=min_version, max_version=max_version,
)
if not server_side:
kwargs.setdefault("server_hostname", SIGNED_CERTFILE_HOSTNAME)
return context.wrap_socket(sock, server_side=server_side, **kwargs)
USE_SAME_TEST_CONTEXT = False
_TEST_CONTEXT = None
def testing_context(server_cert=SIGNED_CERTFILE, *, server_chain=True,
client_cert=None):
"""Create context
client_context, server_context, hostname = testing_context()
"""
global _TEST_CONTEXT
if USE_SAME_TEST_CONTEXT:
if _TEST_CONTEXT is not None:
return _TEST_CONTEXT
if server_cert == SIGNED_CERTFILE:
hostname = SIGNED_CERTFILE_HOSTNAME
elif server_cert == SIGNED_CERTFILE2:
hostname = SIGNED_CERTFILE2_HOSTNAME
elif server_cert == NOSANFILE:
hostname = NOSAN_HOSTNAME
else:
raise ValueError(server_cert)
client_context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
client_context.load_verify_locations(SIGNING_CA)
server_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
server_context.load_cert_chain(server_cert)
if server_chain:
server_context.load_verify_locations(SIGNING_CA)
if client_cert:
client_context.load_cert_chain(client_cert)
server_context.verify_mode = ssl.CERT_REQUIRED
if USE_SAME_TEST_CONTEXT:
if _TEST_CONTEXT is not None:
_TEST_CONTEXT = client_context, server_context, hostname
return client_context, server_context, hostname
def do_ssl_object_handshake(sslobject, outgoing, max_retry=25):
"""Call do_handshake() on the sslobject and return the sent data.
If do_handshake() fails more than *max_retry* times, return None.
"""
data, attempt = None, 0
while not data and attempt < max_retry:
with contextlib.suppress(ssl.SSLWantReadError):
sslobject.do_handshake()
data = outgoing.read()
attempt += 1
return data
class BasicSocketTests(unittest.TestCase):
def test_constants(self):
ssl.CERT_NONE
ssl.CERT_OPTIONAL
ssl.CERT_REQUIRED
ssl.OP_CIPHER_SERVER_PREFERENCE
ssl.OP_SINGLE_DH_USE
ssl.OP_SINGLE_ECDH_USE
ssl.OP_NO_COMPRESSION
self.assertEqual(ssl.HAS_SNI, True)
self.assertEqual(ssl.HAS_ECDH, True)
self.assertIsInstance(ssl.HAS_TLSv1_2, bool)
self.assertEqual(ssl.HAS_TLSv1_3, True)
ssl.OP_NO_SSLv2
ssl.OP_NO_SSLv3
ssl.OP_NO_TLSv1
ssl.OP_NO_TLSv1_3
ssl.OP_NO_TLSv1_1
ssl.OP_NO_TLSv1_2
self.assertEqual(ssl.PROTOCOL_TLS, ssl.PROTOCOL_SSLv23)
def test_options(self):
# gh-106687: SSL options values are unsigned integer (uint64_t)
for name in dir(ssl):
if not name.startswith('OP_'):
continue
with self.subTest(option=name):
value = getattr(ssl, name)
self.assertGreaterEqual(value, 0, f"ssl.{name}")
def test_ssl_types(self):
ssl_types = [
_ssl._SSLContext,
_ssl._SSLSocket,
_ssl.MemoryBIO,
_ssl.Certificate,
_ssl.SSLSession,
_ssl.SSLError,
]
for ssl_type in ssl_types:
with self.subTest(ssl_type=ssl_type):
with self.assertRaisesRegex(TypeError, "immutable type"):
ssl_type.value = None
support.check_disallow_instantiation(self, _ssl.Certificate)
def test_private_init(self):
with self.assertRaisesRegex(TypeError, "public constructor"):
with socket.socket() as s:
ssl.SSLSocket(s)
def test_str_for_enums(self):
# Make sure that the PROTOCOL_* constants have enum-like string
# reprs.
proto = ssl.PROTOCOL_TLS_CLIENT
self.assertEqual(repr(proto), '<_SSLMethod.PROTOCOL_TLS_CLIENT: %r>' % proto.value)
self.assertEqual(str(proto), str(proto.value))
ctx = ssl.SSLContext(proto)
self.assertIs(ctx.protocol, proto)
def test_random(self):
v = ssl.RAND_status()
if support.verbose:
sys.stdout.write("\n RAND_status is %d (%s)\n"
% (v, (v and "sufficient randomness") or
"insufficient randomness"))
if v:
data = ssl.RAND_bytes(16)
self.assertEqual(len(data), 16)
else:
self.assertRaises(ssl.SSLError, ssl.RAND_bytes, 16)
# negative num is invalid
self.assertRaises(ValueError, ssl.RAND_bytes, -5)
ssl.RAND_add("this is a random string", 75.0)
ssl.RAND_add(b"this is a random bytes object", 75.0)
ssl.RAND_add(bytearray(b"this is a random bytearray object"), 75.0)
def test_parse_cert(self):
self.maxDiff = None
# note that this uses an 'unofficial' function in _ssl.c,
# provided solely for this test, to exercise the certificate
# parsing code
self.assertEqual(
ssl._ssl._test_decode_cert(CERTFILE),
CERTFILE_INFO
)
self.assertEqual(
ssl._ssl._test_decode_cert(SIGNED_CERTFILE),
SIGNED_CERTFILE_INFO
)
# Issue #13034: the subjectAltName in some certificates
# (notably projects.developer.nokia.com:443) wasn't parsed
p = ssl._ssl._test_decode_cert(NOKIACERT)
if support.verbose:
sys.stdout.write("\n" + pprint.pformat(p) + "\n")
self.assertEqual(p['subjectAltName'],
(('DNS', 'projects.developer.nokia.com'),
('DNS', 'projects.forum.nokia.com'))
)
# extra OCSP and AIA fields
self.assertEqual(p['OCSP'], ('http://ocsp.verisign.com',))
self.assertEqual(p['caIssuers'],
('http://SVRIntl-G3-aia.verisign.com/SVRIntlG3.cer',))
self.assertEqual(p['crlDistributionPoints'],
('http://SVRIntl-G3-crl.verisign.com/SVRIntlG3.crl',))
def test_parse_cert_CVE_2019_5010(self):
p = ssl._ssl._test_decode_cert(TALOS_INVALID_CRLDP)
if support.verbose:
sys.stdout.write("\n" + pprint.pformat(p) + "\n")
self.assertEqual(
p,
{
'issuer': (
(('countryName', 'UK'),), (('commonName', 'cody-ca'),)),
'notAfter': 'Jun 14 18:00:58 2028 GMT',
'notBefore': 'Jun 18 18:00:58 2018 GMT',
'serialNumber': '02',
'subject': ((('countryName', 'UK'),),
(('commonName',
'codenomicon-vm-2.test.lal.cisco.com'),)),
'subjectAltName': (
('DNS', 'codenomicon-vm-2.test.lal.cisco.com'),),
'version': 3
}
)
def test_parse_cert_CVE_2013_4238(self):
p = ssl._ssl._test_decode_cert(NULLBYTECERT)
if support.verbose:
sys.stdout.write("\n" + pprint.pformat(p) + "\n")
subject = ((('countryName', 'US'),),
(('stateOrProvinceName', 'Oregon'),),
(('localityName', 'Beaverton'),),
(('organizationName', 'Python Software Foundation'),),
(('organizationalUnitName', 'Python Core Development'),),
(('commonName', 'null.python.org\x00example.org'),),
(('emailAddress', 'python-dev@python.org'),))
self.assertEqual(p['subject'], subject)
self.assertEqual(p['issuer'], subject)
if ssl._OPENSSL_API_VERSION >= (0, 9, 8):
san = (('DNS', 'altnull.python.org\x00example.com'),
('email', 'null@python.org\x00user@example.org'),
('URI', 'http://null.python.org\x00http://example.org'),
('IP Address', '192.0.2.1'),
('IP Address', '2001:DB8:0:0:0:0:0:1'))
else:
# OpenSSL 0.9.7 doesn't support IPv6 addresses in subjectAltName
san = (('DNS', 'altnull.python.org\x00example.com'),
('email', 'null@python.org\x00user@example.org'),
('URI', 'http://null.python.org\x00http://example.org'),
('IP Address', '192.0.2.1'),
('IP Address', '<invalid>'))
self.assertEqual(p['subjectAltName'], san)
def test_parse_all_sans(self):
p = ssl._ssl._test_decode_cert(ALLSANFILE)
self.assertEqual(p['subjectAltName'],
(
('DNS', 'allsans'),
('othername', '<unsupported>'),
('othername', '<unsupported>'),
('email', 'user@example.org'),
('DNS', 'www.example.org'),
('DirName',
((('countryName', 'XY'),),
(('localityName', 'Castle Anthrax'),),
(('organizationName', 'Python Software Foundation'),),
(('commonName', 'dirname example'),))),
('URI', 'https://www.python.org/'),
('IP Address', '127.0.0.1'),
('IP Address', '0:0:0:0:0:0:0:1'),
('Registered ID', '1.2.3.4.5')
)
)
def test_DER_to_PEM(self):
with open(CAFILE_CACERT, 'r') as f:
pem = f.read()
d1 = ssl.PEM_cert_to_DER_cert(pem)
p2 = ssl.DER_cert_to_PEM_cert(d1)
d2 = ssl.PEM_cert_to_DER_cert(p2)
self.assertEqual(d1, d2)
if not p2.startswith(ssl.PEM_HEADER + '\n'):
self.fail("DER-to-PEM didn't include correct header:\n%r\n" % p2)
if not p2.endswith('\n' + ssl.PEM_FOOTER + '\n'):
self.fail("DER-to-PEM didn't include correct footer:\n%r\n" % p2)
def test_openssl_version(self):
n = ssl.OPENSSL_VERSION_NUMBER
t = ssl.OPENSSL_VERSION_INFO
s = ssl.OPENSSL_VERSION
self.assertIsInstance(n, int)
self.assertIsInstance(t, tuple)
self.assertIsInstance(s, str)
# Some sanity checks follow
# >= 1.1.1
self.assertGreaterEqual(n, 0x10101000)
# < 5.0
self.assertLess(n, 0x50000000)
major, minor, fix, patch, status = t
self.assertGreaterEqual(major, 1)
self.assertLess(major, 5)
self.assertGreaterEqual(minor, 0)
self.assertLess(minor, 256)
self.assertGreaterEqual(fix, 0)
self.assertLess(fix, 256)
self.assertGreaterEqual(patch, 0)
self.assertLessEqual(patch, 63)
self.assertGreaterEqual(status, 0)
self.assertLessEqual(status, 15)
libressl_ver = f"LibreSSL {major:d}"
if major >= 3:
# 3.x uses 0xMNN00PP0L
openssl_ver = f"OpenSSL {major:d}.{minor:d}.{patch:d}"
else:
openssl_ver = f"OpenSSL {major:d}.{minor:d}.{fix:d}"
self.assertStartsWith(
s, (openssl_ver, libressl_ver, "AWS-LC"),
(t, hex(n))
)
@support.cpython_only
def test_refcycle(self):
# Issue #7943: an SSL object doesn't create reference cycles with
# itself.
s = socket.socket(socket.AF_INET)
ss = test_wrap_socket(s)
wr = weakref.ref(ss)
with warnings_helper.check_warnings(("", ResourceWarning)):
del ss
self.assertEqual(wr(), None)
@unittest.skipIf(sys.platform == 'cygwin', 'test hangs on Cygwin')
def test_wrapped_unconnected(self):
# Methods on an unconnected SSLSocket propagate the original
# OSError raise by the underlying socket object.
s = socket.socket(socket.AF_INET)
with test_wrap_socket(s) as ss:
self.assertRaises(OSError, ss.recv, 1)
self.assertRaises(OSError, ss.recv_into, bytearray(b'x'))
self.assertRaises(OSError, ss.recvfrom, 1)
self.assertRaises(OSError, ss.recvfrom_into, bytearray(b'x'), 1)
self.assertRaises(OSError, ss.send, b'x')
self.assertRaises(OSError, ss.sendto, b'x', ('0.0.0.0', 0))
self.assertRaises(NotImplementedError, ss.dup)
self.assertRaises(NotImplementedError, ss.sendmsg,
[b'x'], (), 0, ('0.0.0.0', 0))
self.assertRaises(NotImplementedError, ss.recvmsg, 100)
self.assertRaises(NotImplementedError, ss.recvmsg_into,
[bytearray(100)])
def test_timeout(self):
# Issue #8524: when creating an SSL socket, the timeout of the
# original socket should be retained.
for timeout in (None, 0.0, 5.0):
s = socket.socket(socket.AF_INET)
s.settimeout(timeout)
with test_wrap_socket(s) as ss:
self.assertEqual(timeout, ss.gettimeout())
def test_openssl111_deprecations(self):
options = [
ssl.OP_NO_TLSv1,
ssl.OP_NO_TLSv1_1,
ssl.OP_NO_TLSv1_2,
ssl.OP_NO_TLSv1_3
]
protocols = []
if hasattr(ssl, 'PROTOCOL_TLSv1'):
protocols.append(ssl.PROTOCOL_TLSv1)
if hasattr(ssl, 'PROTOCOL_TLSv1_1'):
protocols.append(ssl.PROTOCOL_TLSv1_1)
if hasattr(ssl, 'PROTOCOL_TLSv1_2'):
protocols.append(ssl.PROTOCOL_TLSv1_2)
protocols.append(ssl.PROTOCOL_TLS)
versions = [
ssl.TLSVersion.SSLv3,
ssl.TLSVersion.TLSv1,
ssl.TLSVersion.TLSv1_1,
]
for option in options:
with self.subTest(option=option):
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
with self.assertWarns(DeprecationWarning) as cm:
ctx.options |= option
self.assertEqual(
'ssl.OP_NO_SSL*/ssl.OP_NO_TLS* options are deprecated',
str(cm.warning)
)
for protocol in protocols:
if not has_tls_protocol(protocol):
continue
with self.subTest(protocol=protocol):
with self.assertWarns(DeprecationWarning) as cm:
ssl.SSLContext(protocol)
self.assertEqual(
f'ssl.{protocol.name} is deprecated',
str(cm.warning)
)
for version in versions:
if not has_tls_version(version):
continue
with self.subTest(version=version):
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
with self.assertWarns(DeprecationWarning) as cm:
ctx.minimum_version = version
version_text = '%s.%s' % (version.__class__.__name__, version.name)
self.assertEqual(
f'ssl.{version_text} is deprecated',
str(cm.warning)
)
def bad_cert_test(self, certfile):
"""Check that trying to use the given client certificate fails"""
certfile = os.path.join(os.path.dirname(__file__) or os.curdir,
"certdata", certfile)
sock = socket.socket()
self.addCleanup(sock.close)
with self.assertRaises(ssl.SSLError):
test_wrap_socket(sock,
certfile=certfile)
def test_empty_cert(self):
"""Wrapping with an empty cert file"""
self.bad_cert_test("nullcert.pem")
def test_malformed_cert(self):
"""Wrapping with a badly formatted certificate (syntax error)"""
self.bad_cert_test("badcert.pem")
def test_malformed_key(self):
"""Wrapping with a badly formatted key (syntax error)"""
self.bad_cert_test("badkey.pem")
def test_server_side(self):
# server_hostname doesn't work for server sockets
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
with socket.socket() as sock:
self.assertRaises(ValueError, ctx.wrap_socket, sock, True,
server_hostname="some.hostname")
def test_unknown_channel_binding(self):
# should raise ValueError for unknown type
s = socket.create_server(('127.0.0.1', 0))
c = socket.socket(socket.AF_INET)
c.connect(s.getsockname())
with test_wrap_socket(c, do_handshake_on_connect=False) as ss:
with self.assertRaises(ValueError):
ss.get_channel_binding("unknown-type")
s.close()
@unittest.skipUnless("tls-unique" in ssl.CHANNEL_BINDING_TYPES,
"'tls-unique' channel binding not available")
def test_tls_unique_channel_binding(self):
# unconnected should return None for known type
s = socket.socket(socket.AF_INET)
with test_wrap_socket(s) as ss:
self.assertIsNone(ss.get_channel_binding("tls-unique"))
# the same for server-side
s = socket.socket(socket.AF_INET)
with test_wrap_socket(s, server_side=True, certfile=CERTFILE) as ss:
self.assertIsNone(ss.get_channel_binding("tls-unique"))
def test_dealloc_warn(self):
ss = test_wrap_socket(socket.socket(socket.AF_INET))
r = repr(ss)
with self.assertWarns(ResourceWarning) as cm:
ss = None
support.gc_collect()
self.assertIn(r, str(cm.warning.args[0]))
def test_get_default_verify_paths(self):
paths = ssl.get_default_verify_paths()
self.assertEqual(len(paths), 6)
self.assertIsInstance(paths, ssl.DefaultVerifyPaths)
with os_helper.EnvironmentVarGuard() as env:
env["SSL_CERT_DIR"] = CAPATH
env["SSL_CERT_FILE"] = CERTFILE
paths = ssl.get_default_verify_paths()
self.assertEqual(paths.cafile, CERTFILE)
self.assertEqual(paths.capath, CAPATH)
@unittest.skipUnless(sys.platform == "win32", "Windows specific")
def test_enum_certificates(self):
self.assertTrue(ssl.enum_certificates("CA"))
self.assertTrue(ssl.enum_certificates("ROOT"))
self.assertRaises(TypeError, ssl.enum_certificates)
self.assertRaises(WindowsError, ssl.enum_certificates, "")
trust_oids = set()
for storename in ("CA", "ROOT"):
store = ssl.enum_certificates(storename)
self.assertIsInstance(store, list)
for element in store:
self.assertIsInstance(element, tuple)
self.assertEqual(len(element), 3)
cert, enc, trust = element
self.assertIsInstance(cert, bytes)
self.assertIn(enc, {"x509_asn", "pkcs_7_asn"})
self.assertIsInstance(trust, (frozenset, set, bool))
if isinstance(trust, (frozenset, set)):
trust_oids.update(trust)
serverAuth = "1.3.6.1.5.5.7.3.1"
self.assertIn(serverAuth, trust_oids)
@unittest.skipUnless(sys.platform == "win32", "Windows specific")
def test_enum_crls(self):
self.assertTrue(ssl.enum_crls("CA"))
self.assertRaises(TypeError, ssl.enum_crls)
self.assertRaises(WindowsError, ssl.enum_crls, "")
crls = ssl.enum_crls("CA")
self.assertIsInstance(crls, list)
for element in crls:
self.assertIsInstance(element, tuple)
self.assertEqual(len(element), 2)
self.assertIsInstance(element[0], bytes)
self.assertIn(element[1], {"x509_asn", "pkcs_7_asn"})
def test_asn1object(self):
expected = (129, 'serverAuth', 'TLS Web Server Authentication',
'1.3.6.1.5.5.7.3.1')
val = ssl._ASN1Object('1.3.6.1.5.5.7.3.1')
self.assertEqual(val, expected)
self.assertEqual(val.nid, 129)
self.assertEqual(val.shortname, 'serverAuth')
self.assertEqual(val.longname, 'TLS Web Server Authentication')
self.assertEqual(val.oid, '1.3.6.1.5.5.7.3.1')
self.assertIsInstance(val, ssl._ASN1Object)
self.assertRaises(ValueError, ssl._ASN1Object, 'serverAuth')
val = ssl._ASN1Object.fromnid(129)
self.assertEqual(val, expected)
self.assertIsInstance(val, ssl._ASN1Object)
self.assertRaises(ValueError, ssl._ASN1Object.fromnid, -1)
with self.assertRaisesRegex(ValueError, "unknown NID 100000"):
ssl._ASN1Object.fromnid(100000)
for i in range(1000):
try:
obj = ssl._ASN1Object.fromnid(i)
except ValueError:
pass
else:
self.assertIsInstance(obj.nid, int)
self.assertIsInstance(obj.shortname, str)
self.assertIsInstance(obj.longname, str)
self.assertIsInstance(obj.oid, (str, type(None)))
val = ssl._ASN1Object.fromname('TLS Web Server Authentication')
self.assertEqual(val, expected)
self.assertIsInstance(val, ssl._ASN1Object)
self.assertEqual(ssl._ASN1Object.fromname('serverAuth'), expected)
self.assertEqual(ssl._ASN1Object.fromname('1.3.6.1.5.5.7.3.1'),
expected)
with self.assertRaisesRegex(ValueError, "unknown object 'serverauth'"):
ssl._ASN1Object.fromname('serverauth')
def test_purpose_enum(self):
val = ssl._ASN1Object('1.3.6.1.5.5.7.3.1')
self.assertIsInstance(ssl.Purpose.SERVER_AUTH, ssl._ASN1Object)
self.assertEqual(ssl.Purpose.SERVER_AUTH, val)
self.assertEqual(ssl.Purpose.SERVER_AUTH.nid, 129)
self.assertEqual(ssl.Purpose.SERVER_AUTH.shortname, 'serverAuth')
self.assertEqual(ssl.Purpose.SERVER_AUTH.oid,
'1.3.6.1.5.5.7.3.1')
val = ssl._ASN1Object('1.3.6.1.5.5.7.3.2')
self.assertIsInstance(ssl.Purpose.CLIENT_AUTH, ssl._ASN1Object)
self.assertEqual(ssl.Purpose.CLIENT_AUTH, val)
self.assertEqual(ssl.Purpose.CLIENT_AUTH.nid, 130)
self.assertEqual(ssl.Purpose.CLIENT_AUTH.shortname, 'clientAuth')
self.assertEqual(ssl.Purpose.CLIENT_AUTH.oid,
'1.3.6.1.5.5.7.3.2')
def test_unsupported_dtls(self):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.addCleanup(s.close)
with self.assertRaises(NotImplementedError) as cx:
test_wrap_socket(s, cert_reqs=ssl.CERT_NONE)
self.assertEqual(str(cx.exception), "only stream sockets are supported")
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
with self.assertRaises(NotImplementedError) as cx:
ctx.wrap_socket(s)
self.assertEqual(str(cx.exception), "only stream sockets are supported")
def cert_time_ok(self, timestring, timestamp):
self.assertEqual(ssl.cert_time_to_seconds(timestring), timestamp)
def cert_time_fail(self, timestring):
with self.assertRaises(ValueError):
ssl.cert_time_to_seconds(timestring)
@unittest.skipUnless(utc_offset(),
'local time needs to be different from UTC')
def test_cert_time_to_seconds_timezone(self):
# Issue #19940: ssl.cert_time_to_seconds() returns wrong
# results if local timezone is not UTC
self.cert_time_ok("May 9 00:00:00 2007 GMT", 1178668800.0)
self.cert_time_ok("Jan 5 09:34:43 2018 GMT", 1515144883.0)
def test_cert_time_to_seconds(self):
timestring = "Jan 5 09:34:43 2018 GMT"
ts = 1515144883.0
self.cert_time_ok(timestring, ts)
# accept keyword parameter, assert its name
self.assertEqual(ssl.cert_time_to_seconds(cert_time=timestring), ts)
# accept both %e and %d (space or zero generated by strftime)
self.cert_time_ok("Jan 05 09:34:43 2018 GMT", ts)
# case-insensitive
self.cert_time_ok("JaN 5 09:34:43 2018 GmT", ts)
self.cert_time_fail("Jan 5 09:34 2018 GMT") # no seconds
self.cert_time_fail("Jan 5 09:34:43 2018") # no GMT
self.cert_time_fail("Jan 5 09:34:43 2018 UTC") # not GMT timezone
self.cert_time_fail("Jan 35 09:34:43 2018 GMT") # invalid day
self.cert_time_fail("Jon 5 09:34:43 2018 GMT") # invalid month
self.cert_time_fail("Jan 5 24:00:00 2018 GMT") # invalid hour
self.cert_time_fail("Jan 5 09:60:43 2018 GMT") # invalid minute
newyear_ts = 1230768000.0
# leap seconds
self.cert_time_ok("Dec 31 23:59:60 2008 GMT", newyear_ts)
# same timestamp
self.cert_time_ok("Jan 1 00:00:00 2009 GMT", newyear_ts)
self.cert_time_ok("Jan 5 09:34:59 2018 GMT", 1515144899)
# allow 60th second (even if it is not a leap second)
self.cert_time_ok("Jan 5 09:34:60 2018 GMT", 1515144900)
# allow 2nd leap second for compatibility with time.strptime()
self.cert_time_ok("Jan 5 09:34:61 2018 GMT", 1515144901)
self.cert_time_fail("Jan 5 09:34:62 2018 GMT") # invalid seconds
# no special treatment for the special value:
# 99991231235959Z (rfc 5280)
self.cert_time_ok("Dec 31 23:59:59 9999 GMT", 253402300799.0)
@support.run_with_locale('LC_ALL', '')
def test_cert_time_to_seconds_locale(self):
# `cert_time_to_seconds()` should be locale independent
def local_february_name():
return time.strftime('%b', (1, 2, 3, 4, 5, 6, 0, 0, 0))
if local_february_name().lower() == 'feb':
self.skipTest("locale-specific month name needs to be "
"different from C locale")
# locale-independent
self.cert_time_ok("Feb 9 00:00:00 2007 GMT", 1170979200.0)
self.cert_time_fail(local_february_name() + " 9 00:00:00 2007 GMT")
def test_connect_ex_error(self):
server = socket.socket(socket.AF_INET)
self.addCleanup(server.close)
port = socket_helper.bind_port(server) # Reserve port but don't listen
s = test_wrap_socket(socket.socket(socket.AF_INET),
cert_reqs=ssl.CERT_REQUIRED)
self.addCleanup(s.close)
rc = s.connect_ex((HOST, port))
# Issue #19919: Windows machines or VMs hosted on Windows
# machines sometimes return EWOULDBLOCK.
errors = (
errno.ECONNREFUSED, errno.EHOSTUNREACH, errno.ETIMEDOUT,
errno.EWOULDBLOCK,
)
self.assertIn(rc, errors)
def test_read_write_zero(self):
# empty reads and writes now work, bpo-42854, bpo-31711
client_context, server_context, hostname = testing_context()
server = ThreadedEchoServer(context=server_context)
with server:
with client_context.wrap_socket(socket.socket(),
server_hostname=hostname) as s:
s.connect((HOST, server.port))
self.assertEqual(s.recv(0), b"")
self.assertEqual(s.send(b""), 0)
class ContextTests(unittest.TestCase):
def test_constructor(self):
for protocol in PROTOCOLS:
if has_tls_protocol(protocol):
with warnings_helper.check_warnings():
ctx = ssl.SSLContext(protocol)
self.assertEqual(ctx.protocol, protocol)
with warnings_helper.check_warnings():