510 lines
19 KiB
Python
510 lines
19 KiB
Python
|
from __future__ import annotations
|
||
|
|
|
||
|
|
import hmac
|
||
|
|
import os
|
||
|
|
import socket
|
||
|
|
import sys
|
||
|
|
import typing
|
||
|
|
import warnings
|
||
|
|
from binascii import unhexlify
|
||
|
|
from hashlib import md5, sha1, sha256
|
||
|
|
|
||
|
|
from ..exceptions import ProxySchemeUnsupported, SSLError
|
||
|
|
from .url import _BRACELESS_IPV6_ADDRZ_RE, _IPV4_RE
|
||
|
|
|
||
|
|
SSLContext = None
|
||
|
|
SSLTransport = None
|
||
|
|
HAS_NEVER_CHECK_COMMON_NAME = False
|
||
|
|
IS_PYOPENSSL = False
|
||
|
|
ALPN_PROTOCOLS = ["http/1.1"]
|
||
|
|
|
||
|
|
_TYPE_VERSION_INFO = typing.Tuple[int, int, int, str, int]
|
||
|
|
|
||
|
|
# Maps the length of a digest to a possible hash function producing this digest
|
||
|
|
HASHFUNC_MAP = {32: md5, 40: sha1, 64: sha256}
|
||
|
|
|
||
|
|
|
||
|
|
def _is_bpo_43522_fixed(
|
||
|
|
implementation_name: str,
|
||
|
|
version_info: _TYPE_VERSION_INFO,
|
||
|
|
pypy_version_info: _TYPE_VERSION_INFO | None,
|
||
|
|
) -> bool:
|
||
|
|
"""Return True for CPython 3.8.9+, 3.9.3+ or 3.10+ and PyPy 7.3.8+ where
|
||
|
|
setting SSLContext.hostname_checks_common_name to False works.
|
||
|
|
|
||
|
|
Outside of CPython and PyPy we don't know which implementations work
|
||
|
|
or not so we conservatively use our hostname matching as we know that works
|
||
|
|
on all implementations.
|
||
|
|
|
||
|
|
https://github.com/urllib3/urllib3/issues/2192#issuecomment-821832963
|
||
|
|
https://foss.heptapod.net/pypy/pypy/-/issues/3539
|
||
|
|
"""
|
||
|
|
if implementation_name == "pypy":
|
||
|
|
# https://foss.heptapod.net/pypy/pypy/-/issues/3129
|
||
|
|
return pypy_version_info >= (7, 3, 8) # type: ignore[operator]
|
||
|
|
elif implementation_name == "cpython":
|
||
|
|
major_minor = version_info[:2]
|
||
|
|
micro = version_info[2]
|
||
|
|
return (
|
||
|
|
(major_minor == (3, 8) and micro >= 9)
|
||
|
|
or (major_minor == (3, 9) and micro >= 3)
|
||
|
|
or major_minor >= (3, 10)
|
||
|
|
)
|
||
|
|
else: # Defensive:
|
||
|
|
return False
|
||
|
|
|
||
|
|
|
||
|
|
def _is_has_never_check_common_name_reliable(
|
||
|
|
openssl_version: str,
|
||
|
|
openssl_version_number: int,
|
||
|
|
implementation_name: str,
|
||
|
|
version_info: _TYPE_VERSION_INFO,
|
||
|
|
pypy_version_info: _TYPE_VERSION_INFO | None,
|
||
|
|
) -> bool:
|
||
|
|
# As of May 2023, all released versions of LibreSSL fail to reject certificates with
|
||
|
|
# only common names, see https://github.com/urllib3/urllib3/pull/3024
|
||
|
|
is_openssl = openssl_version.startswith("OpenSSL ")
|
||
|
|
# Before fixing OpenSSL issue #14579, the SSL_new() API was not copying hostflags
|
||
|
|
# like X509_CHECK_FLAG_NEVER_CHECK_SUBJECT, which tripped up CPython.
|
||
|
|
# https://github.com/openssl/openssl/issues/14579
|
||
|
|
# This was released in OpenSSL 1.1.1l+ (>=0x101010cf)
|
||
|
|
is_openssl_issue_14579_fixed = openssl_version_number >= 0x101010CF
|
||
|
|
|
||
|
|
return is_openssl and (
|
||
|
|
is_openssl_issue_14579_fixed
|
||
|
|
or _is_bpo_43522_fixed(implementation_name, version_info, pypy_version_info)
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
if typing.TYPE_CHECKING:
|
||
|
|
from ssl import VerifyMode
|
||
|
|
from typing import Literal, TypedDict
|
||
|
|
|
||
|
|
from .ssltransport import SSLTransport as SSLTransportType
|
||
|
|
|
||
|
|
class _TYPE_PEER_CERT_RET_DICT(TypedDict, total=False):
|
||
|
|
subjectAltName: tuple[tuple[str, str], ...]
|
||
|
|
subject: tuple[tuple[tuple[str, str], ...], ...]
|
||
|
|
serialNumber: str
|
||
|
|
|
||
|
|
|
||
|
|
# Mapping from 'ssl.PROTOCOL_TLSX' to 'TLSVersion.X'
|
||
|
|
_SSL_VERSION_TO_TLS_VERSION: dict[int, int] = {}
|
||
|
|
|
||
|
|
try: # Do we have ssl at all?
|
||
|
|
import ssl
|
||
|
|
from ssl import ( # type: ignore[assignment]
|
||
|
|
CERT_REQUIRED,
|
||
|
|
HAS_NEVER_CHECK_COMMON_NAME,
|
||
|
|
OP_NO_COMPRESSION,
|
||
|
|
OP_NO_TICKET,
|
||
|
|
OPENSSL_VERSION,
|
||
|
|
OPENSSL_VERSION_NUMBER,
|
||
|
|
PROTOCOL_TLS,
|
||
|
|
PROTOCOL_TLS_CLIENT,
|
||
|
|
OP_NO_SSLv2,
|
||
|
|
OP_NO_SSLv3,
|
||
|
|
SSLContext,
|
||
|
|
TLSVersion,
|
||
|
|
)
|
||
|
|
|
||
|
|
PROTOCOL_SSLv23 = PROTOCOL_TLS
|
||
|
|
|
||
|
|
# Setting SSLContext.hostname_checks_common_name = False didn't work before CPython
|
||
|
|
# 3.8.9, 3.9.3, and 3.10 (but OK on PyPy) or OpenSSL 1.1.1l+
|
||
|
|
if HAS_NEVER_CHECK_COMMON_NAME and not _is_has_never_check_common_name_reliable(
|
||
|
|
OPENSSL_VERSION,
|
||
|
|
OPENSSL_VERSION_NUMBER,
|
||
|
|
sys.implementation.name,
|
||
|
|
sys.version_info,
|
||
|
|
sys.pypy_version_info if sys.implementation.name == "pypy" else None, # type: ignore[attr-defined]
|
||
|
|
):
|
||
|
|
HAS_NEVER_CHECK_COMMON_NAME = False
|
||
|
|
|
||
|
|
# Need to be careful here in case old TLS versions get
|
||
|
|
# removed in future 'ssl' module implementations.
|
||
|
|
for attr in ("TLSv1", "TLSv1_1", "TLSv1_2"):
|
||
|
|
try:
|
||
|
|
_SSL_VERSION_TO_TLS_VERSION[getattr(ssl, f"PROTOCOL_{attr}")] = getattr(
|
||
|
|
TLSVersion, attr
|
||
|
|
)
|
||
|
|
except AttributeError: # Defensive:
|
||
|
|
continue
|
||
|
|
|
||
|
|
from .ssltransport import SSLTransport # type: ignore[assignment]
|
||
|
|
except ImportError:
|
||
|
|
OP_NO_COMPRESSION = 0x20000 # type: ignore[assignment]
|
||
|
|
OP_NO_TICKET = 0x4000 # type: ignore[assignment]
|
||
|
|
OP_NO_SSLv2 = 0x1000000 # type: ignore[assignment]
|
||
|
|
OP_NO_SSLv3 = 0x2000000 # type: ignore[assignment]
|
||
|
|
PROTOCOL_SSLv23 = PROTOCOL_TLS = 2 # type: ignore[assignment]
|
||
|
|
PROTOCOL_TLS_CLIENT = 16 # type: ignore[assignment]
|
||
|
|
|
||
|
|
|
||
|
|
_TYPE_PEER_CERT_RET = typing.Union["_TYPE_PEER_CERT_RET_DICT", bytes, None]
|
||
|
|
|
||
|
|
|
||
|
|
def assert_fingerprint(cert: bytes | None, fingerprint: str) -> None:
|
||
|
|
"""
|
||
|
|
Checks if given fingerprint matches the supplied certificate.
|
||
|
|
|
||
|
|
:param cert:
|
||
|
|
Certificate as bytes object.
|
||
|
|
:param fingerprint:
|
||
|
|
Fingerprint as string of hexdigits, can be interspersed by colons.
|
||
|
|
"""
|
||
|
|
|
||
|
|
if cert is None:
|
||
|
|
raise SSLError("No certificate for the peer.")
|
||
|
|
|
||
|
|
fingerprint = fingerprint.replace(":", "").lower()
|
||
|
|
digest_length = len(fingerprint)
|
||
|
|
hashfunc = HASHFUNC_MAP.get(digest_length)
|
||
|
|
if not hashfunc:
|
||
|
|
raise SSLError(f"Fingerprint of invalid length: {fingerprint}")
|
||
|
|
|
||
|
|
# We need encode() here for py32; works on py2 and p33.
|
||
|
|
fingerprint_bytes = unhexlify(fingerprint.encode())
|
||
|
|
|
||
|
|
cert_digest = hashfunc(cert).digest()
|
||
|
|
|
||
|
|
if not hmac.compare_digest(cert_digest, fingerprint_bytes):
|
||
|
|
raise SSLError(
|
||
|
|
f'Fingerprints did not match. Expected "{fingerprint}", got "{cert_digest.hex()}"'
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def resolve_cert_reqs(candidate: None | int | str) -> VerifyMode:
|
||
|
|
"""
|
||
|
|
Resolves the argument to a numeric constant, which can be passed to
|
||
|
|
the wrap_socket function/method from the ssl module.
|
||
|
|
Defaults to :data:`ssl.CERT_REQUIRED`.
|
||
|
|
If given a string it is assumed to be the name of the constant in the
|
||
|
|
:mod:`ssl` module or its abbreviation.
|
||
|
|
(So you can specify `REQUIRED` instead of `CERT_REQUIRED`.
|
||
|
|
If it's neither `None` nor a string we assume it is already the numeric
|
||
|
|
constant which can directly be passed to wrap_socket.
|
||
|
|
"""
|
||
|
|
if candidate is None:
|
||
|
|
return CERT_REQUIRED
|
||
|
|
|
||
|
|
if isinstance(candidate, str):
|
||
|
|
res = getattr(ssl, candidate, None)
|
||
|
|
if res is None:
|
||
|
|
res = getattr(ssl, "CERT_" + candidate)
|
||
|
|
return res # type: ignore[no-any-return]
|
||
|
|
|
||
|
|
return candidate # type: ignore[return-value]
|
||
|
|
|
||
|
|
|
||
|
|
def resolve_ssl_version(candidate: None | int | str) -> int:
|
||
|
|
"""
|
||
|
|
like resolve_cert_reqs
|
||
|
|
"""
|
||
|
|
if candidate is None:
|
||
|
|
return PROTOCOL_TLS
|
||
|
|
|
||
|
|
if isinstance(candidate, str):
|
||
|
|
res = getattr(ssl, candidate, None)
|
||
|
|
if res is None:
|
||
|
|
res = getattr(ssl, "PROTOCOL_" + candidate)
|
||
|
|
return typing.cast(int, res)
|
||
|
|
|
||
|
|
return candidate
|
||
|
|
|
||
|
|
|
||
|
|
def create_urllib3_context(
|
||
|
|
ssl_version: int | None = None,
|
||
|
|
cert_reqs: int | None = None,
|
||
|
|
options: int | None = None,
|
||
|
|
ciphers: str | None = None,
|
||
|
|
ssl_minimum_version: int | None = None,
|
||
|
|
ssl_maximum_version: int | None = None,
|
||
|
|
) -> ssl.SSLContext:
|
||
|
|
"""Creates and configures an :class:`ssl.SSLContext` instance for use with urllib3.
|
||
|
|
|
||
|
|
:param ssl_version:
|
||
|
|
The desired protocol version to use. This will default to
|
||
|
|
PROTOCOL_SSLv23 which will negotiate the highest protocol that both
|
||
|
|
the server and your installation of OpenSSL support.
|
||
|
|
|
||
|
|
This parameter is deprecated instead use 'ssl_minimum_version'.
|
||
|
|
:param ssl_minimum_version:
|
||
|
|
The minimum version of TLS to be used. Use the 'ssl.TLSVersion' enum for specifying the value.
|
||
|
|
:param ssl_maximum_version:
|
||
|
|
The maximum version of TLS to be used. Use the 'ssl.TLSVersion' enum for specifying the value.
|
||
|
|
Not recommended to set to anything other than 'ssl.TLSVersion.MAXIMUM_SUPPORTED' which is the
|
||
|
|
default value.
|
||
|
|
:param cert_reqs:
|
||
|
|
Whether to require the certificate verification. This defaults to
|
||
|
|
``ssl.CERT_REQUIRED``.
|
||
|
|
:param options:
|
||
|
|
Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
|
||
|
|
``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``, and ``ssl.OP_NO_TICKET``.
|
||
|
|
:param ciphers:
|
||
|
|
Which cipher suites to allow the server to select. Defaults to either system configured
|
||
|
|
ciphers if OpenSSL 1.1.1+, otherwise uses a secure default set of ciphers.
|
||
|
|
:returns:
|
||
|
|
Constructed SSLContext object with specified options
|
||
|
|
:rtype: SSLContext
|
||
|
|
"""
|
||
|
|
if SSLContext is None:
|
||
|
|
raise TypeError("Can't create an SSLContext object without an ssl module")
|
||
|
|
|
||
|
|
# This means 'ssl_version' was specified as an exact value.
|
||
|
|
if ssl_version not in (None, PROTOCOL_TLS, PROTOCOL_TLS_CLIENT):
|
||
|
|
# Disallow setting 'ssl_version' and 'ssl_minimum|maximum_version'
|
||
|
|
# to avoid conflicts.
|
||
|
|
if ssl_minimum_version is not None or ssl_maximum_version is not None:
|
||
|
|
raise ValueError(
|
||
|
|
"Can't specify both 'ssl_version' and either "
|
||
|
|
"'ssl_minimum_version' or 'ssl_maximum_version'"
|
||
|
|
)
|
||
|
|
|
||
|
|
# 'ssl_version' is deprecated and will be removed in the future.
|
||
|
|
else:
|
||
|
|
# Use 'ssl_minimum_version' and 'ssl_maximum_version' instead.
|
||
|
|
ssl_minimum_version = _SSL_VERSION_TO_TLS_VERSION.get(
|
||
|
|
ssl_version, TLSVersion.MINIMUM_SUPPORTED
|
||
|
|
)
|
||
|
|
ssl_maximum_version = _SSL_VERSION_TO_TLS_VERSION.get(
|
||
|
|
ssl_version, TLSVersion.MAXIMUM_SUPPORTED
|
||
|
|
)
|
||
|
|
|
||
|
|
# This warning message is pushing users to use 'ssl_minimum_version'
|
||
|
|
# instead of both min/max. Best practice is to only set the minimum version and
|
||
|
|
# keep the maximum version to be it's default value: 'TLSVersion.MAXIMUM_SUPPORTED'
|
||
|
|
warnings.warn(
|
||
|
|
"'ssl_version' option is deprecated and will be "
|
||
|
|
"removed in urllib3 v2.1.0. Instead use 'ssl_minimum_version'",
|
||
|
|
category=DeprecationWarning,
|
||
|
|
stacklevel=2,
|
||
|
|
)
|
||
|
|
|
||
|
|
# PROTOCOL_TLS is deprecated in Python 3.10 so we always use PROTOCOL_TLS_CLIENT
|
||
|
|
context = SSLContext(PROTOCOL_TLS_CLIENT)
|
||
|
|
|
||
|
|
if ssl_minimum_version is not None:
|
||
|
|
context.minimum_version = ssl_minimum_version
|
||
|
|
else: # Python <3.10 defaults to 'MINIMUM_SUPPORTED' so explicitly set TLSv1.2 here
|
||
|
|
context.minimum_version = TLSVersion.TLSv1_2
|
||
|
|
|
||
|
|
if ssl_maximum_version is not None:
|
||
|
|
context.maximum_version = ssl_maximum_version
|
||
|
|
|
||
|
|
# Unless we're given ciphers defer to either system ciphers in
|
||
|
|
# the case of OpenSSL 1.1.1+ or use our own secure default ciphers.
|
||
|
|
if ciphers:
|
||
|
|
context.set_ciphers(ciphers)
|
||
|
|
|
||
|
|
# Setting the default here, as we may have no ssl module on import
|
||
|
|
cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
|
||
|
|
|
||
|
|
if options is None:
|
||
|
|
options = 0
|
||
|
|
# SSLv2 is easily broken and is considered harmful and dangerous
|
||
|
|
options |= OP_NO_SSLv2
|
||
|
|
# SSLv3 has several problems and is now dangerous
|
||
|
|
options |= OP_NO_SSLv3
|
||
|
|
# Disable compression to prevent CRIME attacks for OpenSSL 1.0+
|
||
|
|
# (issue #309)
|
||
|
|
options |= OP_NO_COMPRESSION
|
||
|
|
# TLSv1.2 only. Unless set explicitly, do not request tickets.
|
||
|
|
# This may save some bandwidth on wire, and although the ticket is encrypted,
|
||
|
|
# there is a risk associated with it being on wire,
|
||
|
|
# if the server is not rotating its ticketing keys properly.
|
||
|
|
options |= OP_NO_TICKET
|
||
|
|
|
||
|
|
context.options |= options
|
||
|
|
|
||
|
|
# Enable post-handshake authentication for TLS 1.3, see GH #1634. PHA is
|
||
|
|
# necessary for conditional client cert authentication with TLS 1.3.
|
||
|
|
# The attribute is None for OpenSSL <= 1.1.0 or does not exist when using
|
||
|
|
# an SSLContext created by pyOpenSSL.
|
||
|
|
if getattr(context, "post_handshake_auth", None) is not None:
|
||
|
|
context.post_handshake_auth = True
|
||
|
|
|
||
|
|
# The order of the below lines setting verify_mode and check_hostname
|
||
|
|
# matter due to safe-guards SSLContext has to prevent an SSLContext with
|
||
|
|
# check_hostname=True, verify_mode=NONE/OPTIONAL.
|
||
|
|
# We always set 'check_hostname=False' for pyOpenSSL so we rely on our own
|
||
|
|
# 'ssl.match_hostname()' implementation.
|
||
|
|
if cert_reqs == ssl.CERT_REQUIRED and not IS_PYOPENSSL:
|
||
|
|
context.verify_mode = cert_reqs
|
||
|
|
context.check_hostname = True
|
||
|
|
else:
|
||
|
|
context.check_hostname = False
|
||
|
|
context.verify_mode = cert_reqs
|
||
|
|
|
||
|
|
try:
|
||
|
|
context.hostname_checks_common_name = False
|
||
|
|
except AttributeError: # Defensive: for CPython < 3.8.9 and 3.9.3; for PyPy < 7.3.8
|
||
|
|
pass
|
||
|
|
|
||
|
|
# Enable logging of TLS session keys via defacto standard environment variable
|
||
|
|
# 'SSLKEYLOGFILE', if the feature is available (Python 3.8+). Skip empty values.
|
||
|
|
if hasattr(context, "keylog_filename"):
|
||
|
|
sslkeylogfile = os.environ.get("SSLKEYLOGFILE")
|
||
|
|
if sslkeylogfile:
|
||
|
|
context.keylog_filename = sslkeylogfile
|
||
|
|
|
||
|
|
return context
|
||
|
|
|
||
|
|
|
||
|
|
@typing.overload
|
||
|
|
def ssl_wrap_socket(
|
||
|
|
sock: socket.socket,
|
||
|
|
keyfile: str | None = ...,
|
||
|
|
certfile: str | None = ...,
|
||
|
|
cert_reqs: int | None = ...,
|
||
|
|
ca_certs: str | None = ...,
|
||
|
|
server_hostname: str | None = ...,
|
||
|
|
ssl_version: int | None = ...,
|
||
|
|
ciphers: str | None = ...,
|
||
|
|
ssl_context: ssl.SSLContext | None = ...,
|
||
|
|
ca_cert_dir: str | None = ...,
|
||
|
|
key_password: str | None = ...,
|
||
|
|
ca_cert_data: None | str | bytes = ...,
|
||
|
|
tls_in_tls: Literal[False] = ...,
|
||
|
|
) -> ssl.SSLSocket:
|
||
|
|
...
|
||
|
|
|
||
|
|
|
||
|
|
@typing.overload
|
||
|
|
def ssl_wrap_socket(
|
||
|
|
sock: socket.socket,
|
||
|
|
keyfile: str | None = ...,
|
||
|
|
certfile: str | None = ...,
|
||
|
|
cert_reqs: int | None = ...,
|
||
|
|
ca_certs: str | None = ...,
|
||
|
|
server_hostname: str | None = ...,
|
||
|
|
ssl_version: int | None = ...,
|
||
|
|
ciphers: str | None = ...,
|
||
|
|
ssl_context: ssl.SSLContext | None = ...,
|
||
|
|
ca_cert_dir: str | None = ...,
|
||
|
|
key_password: str | None = ...,
|
||
|
|
ca_cert_data: None | str | bytes = ...,
|
||
|
|
tls_in_tls: bool = ...,
|
||
|
|
) -> ssl.SSLSocket | SSLTransportType:
|
||
|
|
...
|
||
|
|
|
||
|
|
|
||
|
|
def ssl_wrap_socket(
|
||
|
|
sock: socket.socket,
|
||
|
|
keyfile: str | None = None,
|
||
|
|
certfile: str | None = None,
|
||
|
|
cert_reqs: int | None = None,
|
||
|
|
ca_certs: str | None = None,
|
||
|
|
server_hostname: str | None = None,
|
||
|
|
ssl_version: int | None = None,
|
||
|
|
ciphers: str | None = None,
|
||
|
|
ssl_context: ssl.SSLContext | None = None,
|
||
|
|
ca_cert_dir: str | None = None,
|
||
|
|
key_password: str | None = None,
|
||
|
|
ca_cert_data: None | str | bytes = None,
|
||
|
|
tls_in_tls: bool = False,
|
||
|
|
) -> ssl.SSLSocket | SSLTransportType:
|
||
|
|
"""
|
||
|
|
All arguments except for server_hostname, ssl_context, tls_in_tls, ca_cert_data and
|
||
|
|
ca_cert_dir have the same meaning as they do when using
|
||
|
|
:func:`ssl.create_default_context`, :meth:`ssl.SSLContext.load_cert_chain`,
|
||
|
|
:meth:`ssl.SSLContext.set_ciphers` and :meth:`ssl.SSLContext.wrap_socket`.
|
||
|
|
|
||
|
|
:param server_hostname:
|
||
|
|
When SNI is supported, the expected hostname of the certificate
|
||
|
|
:param ssl_context:
|
||
|
|
A pre-made :class:`SSLContext` object. If none is provided, one will
|
||
|
|
be created using :func:`create_urllib3_context`.
|
||
|
|
:param ciphers:
|
||
|
|
A string of ciphers we wish the client to support.
|
||
|
|
:param ca_cert_dir:
|
||
|
|
A directory containing CA certificates in multiple separate files, as
|
||
|
|
supported by OpenSSL's -CApath flag or the capath argument to
|
||
|
|
SSLContext.load_verify_locations().
|
||
|
|
:param key_password:
|
||
|
|
Optional password if the keyfile is encrypted.
|
||
|
|
:param ca_cert_data:
|
||
|
|
Optional string containing CA certificates in PEM format suitable for
|
||
|
|
passing as the cadata parameter to SSLContext.load_verify_locations()
|
||
|
|
:param tls_in_tls:
|
||
|
|
Use SSLTransport to wrap the existing socket.
|
||
|
|
"""
|
||
|
|
context = ssl_context
|
||
|
|
if context is None:
|
||
|
|
# Note: This branch of code and all the variables in it are only used in tests.
|
||
|
|
# We should consider deprecating and removing this code.
|
||
|
|
context = create_urllib3_context(ssl_version, cert_reqs, ciphers=ciphers)
|
||
|
|
|
||
|
|
if ca_certs or ca_cert_dir or ca_cert_data:
|
||
|
|
try:
|
||
|
|
context.load_verify_locations(ca_certs, ca_cert_dir, ca_cert_data)
|
||
|
|
except OSError as e:
|
||
|
|
raise SSLError(e) from e
|
||
|
|
|
||
|
|
elif ssl_context is None and hasattr(context, "load_default_certs"):
|
||
|
|
# try to load OS default certs; works well on Windows.
|
||
|
|
context.load_default_certs()
|
||
|
|
|
||
|
|
# Attempt to detect if we get the goofy behavior of the
|
||
|
|
# keyfile being encrypted and OpenSSL asking for the
|
||
|
|
# passphrase via the terminal and instead error out.
|
||
|
|
if keyfile and key_password is None and _is_key_file_encrypted(keyfile):
|
||
|
|
raise SSLError("Client private key is encrypted, password is required")
|
||
|
|
|
||
|
|
if certfile:
|
||
|
|
if key_password is None:
|
||
|
|
context.load_cert_chain(certfile, keyfile)
|
||
|
|
else:
|
||
|
|
context.load_cert_chain(certfile, keyfile, key_password)
|
||
|
|
|
||
|
|
try:
|
||
|
|
context.set_alpn_protocols(ALPN_PROTOCOLS)
|
||
|
|
except NotImplementedError: # Defensive: in CI, we always have set_alpn_protocols
|
||
|
|
pass
|
||
|
|
|
||
|
|
ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls, server_hostname)
|
||
|
|
return ssl_sock
|
||
|
|
|
||
|
|
|
||
|
|
def is_ipaddress(hostname: str | bytes) -> bool:
|
||
|
|
"""Detects whether the hostname given is an IPv4 or IPv6 address.
|
||
|
|
Also detects IPv6 addresses with Zone IDs.
|
||
|
|
|
||
|
|
:param str hostname: Hostname to examine.
|
||
|
|
:return: True if the hostname is an IP address, False otherwise.
|
||
|
|
"""
|
||
|
|
if isinstance(hostname, bytes):
|
||
|
|
# IDN A-label bytes are ASCII compatible.
|
||
|
|
hostname = hostname.decode("ascii")
|
||
|
|
return bool(_IPV4_RE.match(hostname) or _BRACELESS_IPV6_ADDRZ_RE.match(hostname))
|
||
|
|
|
||
|
|
|
||
|
|
def _is_key_file_encrypted(key_file: str) -> bool:
|
||
|
|
"""Detects if a key file is encrypted or not."""
|
||
|
|
with open(key_file) as f:
|
||
|
|
for line in f:
|
||
|
|
# Look for Proc-Type: 4,ENCRYPTED
|
||
|
|
if "ENCRYPTED" in line:
|
||
|
|
return True
|
||
|
|
|
||
|
|
return False
|
||
|
|
|
||
|
|
|
||
|
|
def _ssl_wrap_socket_impl(
|
||
|
|
sock: socket.socket,
|
||
|
|
ssl_context: ssl.SSLContext,
|
||
|
|
tls_in_tls: bool,
|
||
|
|
server_hostname: str | None = None,
|
||
|
|
) -> ssl.SSLSocket | SSLTransportType:
|
||
|
|
if tls_in_tls:
|
||
|
|
if not SSLTransport:
|
||
|
|
# Import error, ssl is not available.
|
||
|
|
raise ProxySchemeUnsupported(
|
||
|
|
"TLS in TLS requires support for the 'ssl' module"
|
||
|
|
)
|
||
|
|
|
||
|
|
SSLTransport._validate_ssl_context_for_tls_in_tls(ssl_context)
|
||
|
|
return SSLTransport(sock, ssl_context, server_hostname)
|
||
|
|
|
||
|
|
return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
|