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906 lines
33 KiB
906 lines
33 KiB
from __future__ import annotations
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import datetime
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import logging
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import os
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import re
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import socket
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import sys
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import typing
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import warnings
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from http.client import HTTPConnection as _HTTPConnection
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from http.client import HTTPException as HTTPException # noqa: F401
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from http.client import ResponseNotReady
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from socket import timeout as SocketTimeout
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if typing.TYPE_CHECKING:
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from typing_extensions import Literal
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from .response import HTTPResponse
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from .util.ssl_ import _TYPE_PEER_CERT_RET_DICT
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from .util.ssltransport import SSLTransport
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from ._collections import HTTPHeaderDict
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from .util.response import assert_header_parsing
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from .util.timeout import _DEFAULT_TIMEOUT, _TYPE_TIMEOUT, Timeout
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from .util.util import to_str
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from .util.wait import wait_for_read
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try: # Compiled with SSL?
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import ssl
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BaseSSLError = ssl.SSLError
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except (ImportError, AttributeError):
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ssl = None # type: ignore[assignment]
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class BaseSSLError(BaseException): # type: ignore[no-redef]
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pass
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from ._base_connection import _TYPE_BODY
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from ._base_connection import ProxyConfig as ProxyConfig
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from ._base_connection import _ResponseOptions as _ResponseOptions
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from ._version import __version__
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from .exceptions import (
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ConnectTimeoutError,
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HeaderParsingError,
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NameResolutionError,
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NewConnectionError,
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ProxyError,
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SystemTimeWarning,
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)
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from .util import SKIP_HEADER, SKIPPABLE_HEADERS, connection, ssl_
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from .util.request import body_to_chunks
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from .util.ssl_ import assert_fingerprint as _assert_fingerprint
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from .util.ssl_ import (
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create_urllib3_context,
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is_ipaddress,
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resolve_cert_reqs,
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resolve_ssl_version,
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ssl_wrap_socket,
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)
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from .util.ssl_match_hostname import CertificateError, match_hostname
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from .util.url import Url
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# Not a no-op, we're adding this to the namespace so it can be imported.
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ConnectionError = ConnectionError
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BrokenPipeError = BrokenPipeError
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log = logging.getLogger(__name__)
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port_by_scheme = {"http": 80, "https": 443}
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# When it comes time to update this value as a part of regular maintenance
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# (ie test_recent_date is failing) update it to ~6 months before the current date.
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RECENT_DATE = datetime.date(2022, 1, 1)
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_CONTAINS_CONTROL_CHAR_RE = re.compile(r"[^-!#$%&'*+.^_`|~0-9a-zA-Z]")
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_HAS_SYS_AUDIT = hasattr(sys, "audit")
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class HTTPConnection(_HTTPConnection):
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"""
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Based on :class:`http.client.HTTPConnection` but provides an extra constructor
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backwards-compatibility layer between older and newer Pythons.
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Additional keyword parameters are used to configure attributes of the connection.
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Accepted parameters include:
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- ``source_address``: Set the source address for the current connection.
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- ``socket_options``: Set specific options on the underlying socket. If not specified, then
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defaults are loaded from ``HTTPConnection.default_socket_options`` which includes disabling
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Nagle's algorithm (sets TCP_NODELAY to 1) unless the connection is behind a proxy.
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For example, if you wish to enable TCP Keep Alive in addition to the defaults,
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you might pass:
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.. code-block:: python
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HTTPConnection.default_socket_options + [
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(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
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]
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Or you may want to disable the defaults by passing an empty list (e.g., ``[]``).
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"""
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default_port: typing.ClassVar[int] = port_by_scheme["http"] # type: ignore[misc]
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#: Disable Nagle's algorithm by default.
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#: ``[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]``
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default_socket_options: typing.ClassVar[connection._TYPE_SOCKET_OPTIONS] = [
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(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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]
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#: Whether this connection verifies the host's certificate.
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is_verified: bool = False
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#: Whether this proxy connection verified the proxy host's certificate.
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# If no proxy is currently connected to the value will be ``None``.
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proxy_is_verified: bool | None = None
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blocksize: int
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source_address: tuple[str, int] | None
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socket_options: connection._TYPE_SOCKET_OPTIONS | None
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_has_connected_to_proxy: bool
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_response_options: _ResponseOptions | None
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_tunnel_host: str | None
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_tunnel_port: int | None
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_tunnel_scheme: str | None
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def __init__(
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self,
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host: str,
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port: int | None = None,
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*,
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timeout: _TYPE_TIMEOUT = _DEFAULT_TIMEOUT,
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source_address: tuple[str, int] | None = None,
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blocksize: int = 8192,
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socket_options: None
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| (connection._TYPE_SOCKET_OPTIONS) = default_socket_options,
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proxy: Url | None = None,
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proxy_config: ProxyConfig | None = None,
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) -> None:
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super().__init__(
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host=host,
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port=port,
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timeout=Timeout.resolve_default_timeout(timeout),
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source_address=source_address,
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blocksize=blocksize,
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)
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self.socket_options = socket_options
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self.proxy = proxy
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self.proxy_config = proxy_config
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self._has_connected_to_proxy = False
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self._response_options = None
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self._tunnel_host: str | None = None
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self._tunnel_port: int | None = None
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self._tunnel_scheme: str | None = None
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# https://github.com/python/mypy/issues/4125
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# Mypy treats this as LSP violation, which is considered a bug.
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# If `host` is made a property it violates LSP, because a writeable attribute is overridden with a read-only one.
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# However, there is also a `host` setter so LSP is not violated.
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# Potentially, a `@host.deleter` might be needed depending on how this issue will be fixed.
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@property
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def host(self) -> str:
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"""
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Getter method to remove any trailing dots that indicate the hostname is an FQDN.
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In general, SSL certificates don't include the trailing dot indicating a
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fully-qualified domain name, and thus, they don't validate properly when
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checked against a domain name that includes the dot. In addition, some
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servers may not expect to receive the trailing dot when provided.
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However, the hostname with trailing dot is critical to DNS resolution; doing a
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lookup with the trailing dot will properly only resolve the appropriate FQDN,
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whereas a lookup without a trailing dot will search the system's search domain
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list. Thus, it's important to keep the original host around for use only in
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those cases where it's appropriate (i.e., when doing DNS lookup to establish the
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actual TCP connection across which we're going to send HTTP requests).
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"""
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return self._dns_host.rstrip(".")
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@host.setter
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def host(self, value: str) -> None:
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"""
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Setter for the `host` property.
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We assume that only urllib3 uses the _dns_host attribute; httplib itself
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only uses `host`, and it seems reasonable that other libraries follow suit.
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"""
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self._dns_host = value
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def _new_conn(self) -> socket.socket:
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"""Establish a socket connection and set nodelay settings on it.
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:return: New socket connection.
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"""
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try:
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sock = connection.create_connection(
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(self._dns_host, self.port),
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self.timeout,
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source_address=self.source_address,
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socket_options=self.socket_options,
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)
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except socket.gaierror as e:
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raise NameResolutionError(self.host, self, e) from e
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except SocketTimeout as e:
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raise ConnectTimeoutError(
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self,
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f"Connection to {self.host} timed out. (connect timeout={self.timeout})",
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) from e
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except OSError as e:
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raise NewConnectionError(
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self, f"Failed to establish a new connection: {e}"
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) from e
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# Audit hooks are only available in Python 3.8+
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if _HAS_SYS_AUDIT:
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sys.audit("http.client.connect", self, self.host, self.port)
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return sock
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def set_tunnel(
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self,
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host: str,
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port: int | None = None,
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headers: typing.Mapping[str, str] | None = None,
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scheme: str = "http",
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) -> None:
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if scheme not in ("http", "https"):
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raise ValueError(
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f"Invalid proxy scheme for tunneling: {scheme!r}, must be either 'http' or 'https'"
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)
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super().set_tunnel(host, port=port, headers=headers)
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self._tunnel_scheme = scheme
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def connect(self) -> None:
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self.sock = self._new_conn()
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if self._tunnel_host:
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# If we're tunneling it means we're connected to our proxy.
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self._has_connected_to_proxy = True
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# TODO: Fix tunnel so it doesn't depend on self.sock state.
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self._tunnel() # type: ignore[attr-defined]
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# If there's a proxy to be connected to we are fully connected.
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# This is set twice (once above and here) due to forwarding proxies
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# not using tunnelling.
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self._has_connected_to_proxy = bool(self.proxy)
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@property
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def is_closed(self) -> bool:
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return self.sock is None
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@property
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def is_connected(self) -> bool:
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if self.sock is None:
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return False
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return not wait_for_read(self.sock, timeout=0.0)
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@property
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def has_connected_to_proxy(self) -> bool:
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return self._has_connected_to_proxy
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def close(self) -> None:
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try:
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super().close()
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finally:
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# Reset all stateful properties so connection
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# can be re-used without leaking prior configs.
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self.sock = None
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self.is_verified = False
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self.proxy_is_verified = None
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self._has_connected_to_proxy = False
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self._response_options = None
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self._tunnel_host = None
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self._tunnel_port = None
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self._tunnel_scheme = None
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def putrequest(
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self,
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method: str,
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url: str,
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skip_host: bool = False,
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skip_accept_encoding: bool = False,
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) -> None:
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""""""
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# Empty docstring because the indentation of CPython's implementation
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# is broken but we don't want this method in our documentation.
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match = _CONTAINS_CONTROL_CHAR_RE.search(method)
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if match:
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raise ValueError(
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f"Method cannot contain non-token characters {method!r} (found at least {match.group()!r})"
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)
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return super().putrequest(
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method, url, skip_host=skip_host, skip_accept_encoding=skip_accept_encoding
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)
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def putheader(self, header: str, *values: str) -> None:
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""""""
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if not any(isinstance(v, str) and v == SKIP_HEADER for v in values):
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super().putheader(header, *values)
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elif to_str(header.lower()) not in SKIPPABLE_HEADERS:
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skippable_headers = "', '".join(
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[str.title(header) for header in sorted(SKIPPABLE_HEADERS)]
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)
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raise ValueError(
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f"urllib3.util.SKIP_HEADER only supports '{skippable_headers}'"
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)
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# `request` method's signature intentionally violates LSP.
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# urllib3's API is different from `http.client.HTTPConnection` and the subclassing is only incidental.
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def request( # type: ignore[override]
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self,
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method: str,
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url: str,
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body: _TYPE_BODY | None = None,
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headers: typing.Mapping[str, str] | None = None,
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*,
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chunked: bool = False,
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preload_content: bool = True,
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decode_content: bool = True,
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enforce_content_length: bool = True,
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) -> None:
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# Update the inner socket's timeout value to send the request.
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# This only triggers if the connection is re-used.
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if self.sock is not None:
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self.sock.settimeout(self.timeout)
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# Store these values to be fed into the HTTPResponse
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# object later. TODO: Remove this in favor of a real
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# HTTP lifecycle mechanism.
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# We have to store these before we call .request()
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# because sometimes we can still salvage a response
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# off the wire even if we aren't able to completely
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# send the request body.
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self._response_options = _ResponseOptions(
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request_method=method,
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request_url=url,
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preload_content=preload_content,
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decode_content=decode_content,
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enforce_content_length=enforce_content_length,
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)
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if headers is None:
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headers = {}
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header_keys = frozenset(to_str(k.lower()) for k in headers)
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skip_accept_encoding = "accept-encoding" in header_keys
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skip_host = "host" in header_keys
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self.putrequest(
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method, url, skip_accept_encoding=skip_accept_encoding, skip_host=skip_host
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)
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# Transform the body into an iterable of sendall()-able chunks
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# and detect if an explicit Content-Length is doable.
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chunks_and_cl = body_to_chunks(body, method=method, blocksize=self.blocksize)
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chunks = chunks_and_cl.chunks
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content_length = chunks_and_cl.content_length
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# When chunked is explicit set to 'True' we respect that.
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if chunked:
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if "transfer-encoding" not in header_keys:
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self.putheader("Transfer-Encoding", "chunked")
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else:
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# Detect whether a framing mechanism is already in use. If so
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# we respect that value, otherwise we pick chunked vs content-length
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# depending on the type of 'body'.
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if "content-length" in header_keys:
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chunked = False
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elif "transfer-encoding" in header_keys:
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chunked = True
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# Otherwise we go off the recommendation of 'body_to_chunks()'.
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else:
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chunked = False
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if content_length is None:
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if chunks is not None:
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chunked = True
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self.putheader("Transfer-Encoding", "chunked")
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else:
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self.putheader("Content-Length", str(content_length))
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# Now that framing headers are out of the way we send all the other headers.
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if "user-agent" not in header_keys:
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self.putheader("User-Agent", _get_default_user_agent())
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for header, value in headers.items():
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self.putheader(header, value)
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self.endheaders()
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# If we're given a body we start sending that in chunks.
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if chunks is not None:
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for chunk in chunks:
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# Sending empty chunks isn't allowed for TE: chunked
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# as it indicates the end of the body.
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if not chunk:
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continue
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if isinstance(chunk, str):
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chunk = chunk.encode("utf-8")
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if chunked:
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self.send(b"%x\r\n%b\r\n" % (len(chunk), chunk))
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else:
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self.send(chunk)
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|
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# Regardless of whether we have a body or not, if we're in
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# chunked mode we want to send an explicit empty chunk.
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if chunked:
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self.send(b"0\r\n\r\n")
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|
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def request_chunked(
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self,
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method: str,
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url: str,
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body: _TYPE_BODY | None = None,
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headers: typing.Mapping[str, str] | None = None,
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) -> None:
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"""
|
|
Alternative to the common request method, which sends the
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body with chunked encoding and not as one block
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"""
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warnings.warn(
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"HTTPConnection.request_chunked() is deprecated and will be removed "
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|
"in urllib3 v2.1.0. Instead use HTTPConnection.request(..., chunked=True).",
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category=DeprecationWarning,
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stacklevel=2,
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)
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self.request(method, url, body=body, headers=headers, chunked=True)
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|
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def getresponse( # type: ignore[override]
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self,
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) -> HTTPResponse:
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|
"""
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Get the response from the server.
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|
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If the HTTPConnection is in the correct state, returns an instance of HTTPResponse or of whatever object is returned by the response_class variable.
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If a request has not been sent or if a previous response has not be handled, ResponseNotReady is raised. If the HTTP response indicates that the connection should be closed, then it will be closed before the response is returned. When the connection is closed, the underlying socket is closed.
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"""
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# Raise the same error as http.client.HTTPConnection
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|
if self._response_options is None:
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raise ResponseNotReady()
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|
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# Reset this attribute for being used again.
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|
resp_options = self._response_options
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self._response_options = None
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|
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# Since the connection's timeout value may have been updated
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|
# we need to set the timeout on the socket.
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self.sock.settimeout(self.timeout)
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|
|
# This is needed here to avoid circular import errors
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|
from .response import HTTPResponse
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|
|
# Get the response from http.client.HTTPConnection
|
|
httplib_response = super().getresponse()
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|
|
try:
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|
assert_header_parsing(httplib_response.msg)
|
|
except (HeaderParsingError, TypeError) as hpe:
|
|
log.warning(
|
|
"Failed to parse headers (url=%s): %s",
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|
_url_from_connection(self, resp_options.request_url),
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|
hpe,
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|
exc_info=True,
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)
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headers = HTTPHeaderDict(httplib_response.msg.items())
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|
|
response = HTTPResponse(
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body=httplib_response,
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|
headers=headers,
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status=httplib_response.status,
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version=httplib_response.version,
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reason=httplib_response.reason,
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preload_content=resp_options.preload_content,
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decode_content=resp_options.decode_content,
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original_response=httplib_response,
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enforce_content_length=resp_options.enforce_content_length,
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request_method=resp_options.request_method,
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|
request_url=resp_options.request_url,
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)
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return response
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|
|
|
|
class HTTPSConnection(HTTPConnection):
|
|
"""
|
|
Many of the parameters to this constructor are passed to the underlying SSL
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|
socket by means of :py:func:`urllib3.util.ssl_wrap_socket`.
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|
"""
|
|
|
|
default_port = port_by_scheme["https"] # type: ignore[misc]
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|
|
cert_reqs: int | str | None = None
|
|
ca_certs: str | None = None
|
|
ca_cert_dir: str | None = None
|
|
ca_cert_data: None | str | bytes = None
|
|
ssl_version: int | str | None = None
|
|
ssl_minimum_version: int | None = None
|
|
ssl_maximum_version: int | None = None
|
|
assert_fingerprint: str | None = None
|
|
|
|
def __init__(
|
|
self,
|
|
host: str,
|
|
port: int | None = None,
|
|
*,
|
|
timeout: _TYPE_TIMEOUT = _DEFAULT_TIMEOUT,
|
|
source_address: tuple[str, int] | None = None,
|
|
blocksize: int = 8192,
|
|
socket_options: None
|
|
| (connection._TYPE_SOCKET_OPTIONS) = HTTPConnection.default_socket_options,
|
|
proxy: Url | None = None,
|
|
proxy_config: ProxyConfig | None = None,
|
|
cert_reqs: int | str | None = None,
|
|
assert_hostname: None | str | Literal[False] = None,
|
|
assert_fingerprint: str | None = None,
|
|
server_hostname: str | None = None,
|
|
ssl_context: ssl.SSLContext | None = None,
|
|
ca_certs: str | None = None,
|
|
ca_cert_dir: str | None = None,
|
|
ca_cert_data: None | str | bytes = None,
|
|
ssl_minimum_version: int | None = None,
|
|
ssl_maximum_version: int | None = None,
|
|
ssl_version: int | str | None = None, # Deprecated
|
|
cert_file: str | None = None,
|
|
key_file: str | None = None,
|
|
key_password: str | None = None,
|
|
) -> None:
|
|
super().__init__(
|
|
host,
|
|
port=port,
|
|
timeout=timeout,
|
|
source_address=source_address,
|
|
blocksize=blocksize,
|
|
socket_options=socket_options,
|
|
proxy=proxy,
|
|
proxy_config=proxy_config,
|
|
)
|
|
|
|
self.key_file = key_file
|
|
self.cert_file = cert_file
|
|
self.key_password = key_password
|
|
self.ssl_context = ssl_context
|
|
self.server_hostname = server_hostname
|
|
self.assert_hostname = assert_hostname
|
|
self.assert_fingerprint = assert_fingerprint
|
|
self.ssl_version = ssl_version
|
|
self.ssl_minimum_version = ssl_minimum_version
|
|
self.ssl_maximum_version = ssl_maximum_version
|
|
self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
|
|
self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
|
|
self.ca_cert_data = ca_cert_data
|
|
|
|
# cert_reqs depends on ssl_context so calculate last.
|
|
if cert_reqs is None:
|
|
if self.ssl_context is not None:
|
|
cert_reqs = self.ssl_context.verify_mode
|
|
else:
|
|
cert_reqs = resolve_cert_reqs(None)
|
|
self.cert_reqs = cert_reqs
|
|
|
|
def set_cert(
|
|
self,
|
|
key_file: str | None = None,
|
|
cert_file: str | None = None,
|
|
cert_reqs: int | str | None = None,
|
|
key_password: str | None = None,
|
|
ca_certs: str | None = None,
|
|
assert_hostname: None | str | Literal[False] = None,
|
|
assert_fingerprint: str | None = None,
|
|
ca_cert_dir: str | None = None,
|
|
ca_cert_data: None | str | bytes = None,
|
|
) -> None:
|
|
"""
|
|
This method should only be called once, before the connection is used.
|
|
"""
|
|
warnings.warn(
|
|
"HTTPSConnection.set_cert() is deprecated and will be removed "
|
|
"in urllib3 v2.1.0. Instead provide the parameters to the "
|
|
"HTTPSConnection constructor.",
|
|
category=DeprecationWarning,
|
|
stacklevel=2,
|
|
)
|
|
|
|
# If cert_reqs is not provided we'll assume CERT_REQUIRED unless we also
|
|
# have an SSLContext object in which case we'll use its verify_mode.
|
|
if cert_reqs is None:
|
|
if self.ssl_context is not None:
|
|
cert_reqs = self.ssl_context.verify_mode
|
|
else:
|
|
cert_reqs = resolve_cert_reqs(None)
|
|
|
|
self.key_file = key_file
|
|
self.cert_file = cert_file
|
|
self.cert_reqs = cert_reqs
|
|
self.key_password = key_password
|
|
self.assert_hostname = assert_hostname
|
|
self.assert_fingerprint = assert_fingerprint
|
|
self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
|
|
self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
|
|
self.ca_cert_data = ca_cert_data
|
|
|
|
def connect(self) -> None:
|
|
sock: socket.socket | ssl.SSLSocket
|
|
self.sock = sock = self._new_conn()
|
|
server_hostname: str = self.host
|
|
tls_in_tls = False
|
|
|
|
# Do we need to establish a tunnel?
|
|
if self._tunnel_host is not None:
|
|
# We're tunneling to an HTTPS origin so need to do TLS-in-TLS.
|
|
if self._tunnel_scheme == "https":
|
|
self.sock = sock = self._connect_tls_proxy(self.host, sock)
|
|
tls_in_tls = True
|
|
|
|
# If we're tunneling it means we're connected to our proxy.
|
|
self._has_connected_to_proxy = True
|
|
|
|
self._tunnel() # type: ignore[attr-defined]
|
|
# Override the host with the one we're requesting data from.
|
|
server_hostname = self._tunnel_host
|
|
|
|
if self.server_hostname is not None:
|
|
server_hostname = self.server_hostname
|
|
|
|
is_time_off = datetime.date.today() < RECENT_DATE
|
|
if is_time_off:
|
|
warnings.warn(
|
|
(
|
|
f"System time is way off (before {RECENT_DATE}). This will probably "
|
|
"lead to SSL verification errors"
|
|
),
|
|
SystemTimeWarning,
|
|
)
|
|
|
|
sock_and_verified = _ssl_wrap_socket_and_match_hostname(
|
|
sock=sock,
|
|
cert_reqs=self.cert_reqs,
|
|
ssl_version=self.ssl_version,
|
|
ssl_minimum_version=self.ssl_minimum_version,
|
|
ssl_maximum_version=self.ssl_maximum_version,
|
|
ca_certs=self.ca_certs,
|
|
ca_cert_dir=self.ca_cert_dir,
|
|
ca_cert_data=self.ca_cert_data,
|
|
cert_file=self.cert_file,
|
|
key_file=self.key_file,
|
|
key_password=self.key_password,
|
|
server_hostname=server_hostname,
|
|
ssl_context=self.ssl_context,
|
|
tls_in_tls=tls_in_tls,
|
|
assert_hostname=self.assert_hostname,
|
|
assert_fingerprint=self.assert_fingerprint,
|
|
)
|
|
self.sock = sock_and_verified.socket
|
|
self.is_verified = sock_and_verified.is_verified
|
|
|
|
# If there's a proxy to be connected to we are fully connected.
|
|
# This is set twice (once above and here) due to forwarding proxies
|
|
# not using tunnelling.
|
|
self._has_connected_to_proxy = bool(self.proxy)
|
|
|
|
def _connect_tls_proxy(self, hostname: str, sock: socket.socket) -> ssl.SSLSocket:
|
|
"""
|
|
Establish a TLS connection to the proxy using the provided SSL context.
|
|
"""
|
|
# `_connect_tls_proxy` is called when self._tunnel_host is truthy.
|
|
proxy_config = typing.cast(ProxyConfig, self.proxy_config)
|
|
ssl_context = proxy_config.ssl_context
|
|
sock_and_verified = _ssl_wrap_socket_and_match_hostname(
|
|
sock,
|
|
cert_reqs=self.cert_reqs,
|
|
ssl_version=self.ssl_version,
|
|
ssl_minimum_version=self.ssl_minimum_version,
|
|
ssl_maximum_version=self.ssl_maximum_version,
|
|
ca_certs=self.ca_certs,
|
|
ca_cert_dir=self.ca_cert_dir,
|
|
ca_cert_data=self.ca_cert_data,
|
|
server_hostname=hostname,
|
|
ssl_context=ssl_context,
|
|
assert_hostname=proxy_config.assert_hostname,
|
|
assert_fingerprint=proxy_config.assert_fingerprint,
|
|
# Features that aren't implemented for proxies yet:
|
|
cert_file=None,
|
|
key_file=None,
|
|
key_password=None,
|
|
tls_in_tls=False,
|
|
)
|
|
self.proxy_is_verified = sock_and_verified.is_verified
|
|
return sock_and_verified.socket # type: ignore[return-value]
|
|
|
|
|
|
class _WrappedAndVerifiedSocket(typing.NamedTuple):
|
|
"""
|
|
Wrapped socket and whether the connection is
|
|
verified after the TLS handshake
|
|
"""
|
|
|
|
socket: ssl.SSLSocket | SSLTransport
|
|
is_verified: bool
|
|
|
|
|
|
def _ssl_wrap_socket_and_match_hostname(
|
|
sock: socket.socket,
|
|
*,
|
|
cert_reqs: None | str | int,
|
|
ssl_version: None | str | int,
|
|
ssl_minimum_version: int | None,
|
|
ssl_maximum_version: int | None,
|
|
cert_file: str | None,
|
|
key_file: str | None,
|
|
key_password: str | None,
|
|
ca_certs: str | None,
|
|
ca_cert_dir: str | None,
|
|
ca_cert_data: None | str | bytes,
|
|
assert_hostname: None | str | Literal[False],
|
|
assert_fingerprint: str | None,
|
|
server_hostname: str | None,
|
|
ssl_context: ssl.SSLContext | None,
|
|
tls_in_tls: bool = False,
|
|
) -> _WrappedAndVerifiedSocket:
|
|
"""Logic for constructing an SSLContext from all TLS parameters, passing
|
|
that down into ssl_wrap_socket, and then doing certificate verification
|
|
either via hostname or fingerprint. This function exists to guarantee
|
|
that both proxies and targets have the same behavior when connecting via TLS.
|
|
"""
|
|
default_ssl_context = False
|
|
if ssl_context is None:
|
|
default_ssl_context = True
|
|
context = create_urllib3_context(
|
|
ssl_version=resolve_ssl_version(ssl_version),
|
|
ssl_minimum_version=ssl_minimum_version,
|
|
ssl_maximum_version=ssl_maximum_version,
|
|
cert_reqs=resolve_cert_reqs(cert_reqs),
|
|
)
|
|
else:
|
|
context = ssl_context
|
|
|
|
context.verify_mode = resolve_cert_reqs(cert_reqs)
|
|
|
|
# In some cases, we want to verify hostnames ourselves
|
|
if (
|
|
# `ssl` can't verify fingerprints or alternate hostnames
|
|
assert_fingerprint
|
|
or assert_hostname
|
|
# assert_hostname can be set to False to disable hostname checking
|
|
or assert_hostname is False
|
|
# We still support OpenSSL 1.0.2, which prevents us from verifying
|
|
# hostnames easily: https://github.com/pyca/pyopenssl/pull/933
|
|
or ssl_.IS_PYOPENSSL
|
|
or not ssl_.HAS_NEVER_CHECK_COMMON_NAME
|
|
):
|
|
context.check_hostname = False
|
|
|
|
# Try to load OS default certs if none are given.
|
|
# We need to do the hasattr() check for our custom
|
|
# pyOpenSSL and SecureTransport SSLContext objects
|
|
# because neither support load_default_certs().
|
|
if (
|
|
not ca_certs
|
|
and not ca_cert_dir
|
|
and not ca_cert_data
|
|
and default_ssl_context
|
|
and hasattr(context, "load_default_certs")
|
|
):
|
|
context.load_default_certs()
|
|
|
|
# Ensure that IPv6 addresses are in the proper format and don't have a
|
|
# scope ID. Python's SSL module fails to recognize scoped IPv6 addresses
|
|
# and interprets them as DNS hostnames.
|
|
if server_hostname is not None:
|
|
normalized = server_hostname.strip("[]")
|
|
if "%" in normalized:
|
|
normalized = normalized[: normalized.rfind("%")]
|
|
if is_ipaddress(normalized):
|
|
server_hostname = normalized
|
|
|
|
ssl_sock = ssl_wrap_socket(
|
|
sock=sock,
|
|
keyfile=key_file,
|
|
certfile=cert_file,
|
|
key_password=key_password,
|
|
ca_certs=ca_certs,
|
|
ca_cert_dir=ca_cert_dir,
|
|
ca_cert_data=ca_cert_data,
|
|
server_hostname=server_hostname,
|
|
ssl_context=context,
|
|
tls_in_tls=tls_in_tls,
|
|
)
|
|
|
|
try:
|
|
if assert_fingerprint:
|
|
_assert_fingerprint(
|
|
ssl_sock.getpeercert(binary_form=True), assert_fingerprint
|
|
)
|
|
elif (
|
|
context.verify_mode != ssl.CERT_NONE
|
|
and not context.check_hostname
|
|
and assert_hostname is not False
|
|
):
|
|
cert: _TYPE_PEER_CERT_RET_DICT = ssl_sock.getpeercert() # type: ignore[assignment]
|
|
|
|
# Need to signal to our match_hostname whether to use 'commonName' or not.
|
|
# If we're using our own constructed SSLContext we explicitly set 'False'
|
|
# because PyPy hard-codes 'True' from SSLContext.hostname_checks_common_name.
|
|
if default_ssl_context:
|
|
hostname_checks_common_name = False
|
|
else:
|
|
hostname_checks_common_name = (
|
|
getattr(context, "hostname_checks_common_name", False) or False
|
|
)
|
|
|
|
_match_hostname(
|
|
cert,
|
|
assert_hostname or server_hostname, # type: ignore[arg-type]
|
|
hostname_checks_common_name,
|
|
)
|
|
|
|
return _WrappedAndVerifiedSocket(
|
|
socket=ssl_sock,
|
|
is_verified=context.verify_mode == ssl.CERT_REQUIRED
|
|
or bool(assert_fingerprint),
|
|
)
|
|
except BaseException:
|
|
ssl_sock.close()
|
|
raise
|
|
|
|
|
|
def _match_hostname(
|
|
cert: _TYPE_PEER_CERT_RET_DICT | None,
|
|
asserted_hostname: str,
|
|
hostname_checks_common_name: bool = False,
|
|
) -> None:
|
|
# Our upstream implementation of ssl.match_hostname()
|
|
# only applies this normalization to IP addresses so it doesn't
|
|
# match DNS SANs so we do the same thing!
|
|
stripped_hostname = asserted_hostname.strip("[]")
|
|
if is_ipaddress(stripped_hostname):
|
|
asserted_hostname = stripped_hostname
|
|
|
|
try:
|
|
match_hostname(cert, asserted_hostname, hostname_checks_common_name)
|
|
except CertificateError as e:
|
|
log.warning(
|
|
"Certificate did not match expected hostname: %s. Certificate: %s",
|
|
asserted_hostname,
|
|
cert,
|
|
)
|
|
# Add cert to exception and reraise so client code can inspect
|
|
# the cert when catching the exception, if they want to
|
|
e._peer_cert = cert # type: ignore[attr-defined]
|
|
raise
|
|
|
|
|
|
def _wrap_proxy_error(err: Exception, proxy_scheme: str | None) -> ProxyError:
|
|
# Look for the phrase 'wrong version number', if found
|
|
# then we should warn the user that we're very sure that
|
|
# this proxy is HTTP-only and they have a configuration issue.
|
|
error_normalized = " ".join(re.split("[^a-z]", str(err).lower()))
|
|
is_likely_http_proxy = (
|
|
"wrong version number" in error_normalized
|
|
or "unknown protocol" in error_normalized
|
|
)
|
|
http_proxy_warning = (
|
|
". Your proxy appears to only use HTTP and not HTTPS, "
|
|
"try changing your proxy URL to be HTTP. See: "
|
|
"https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
|
|
"#https-proxy-error-http-proxy"
|
|
)
|
|
new_err = ProxyError(
|
|
f"Unable to connect to proxy"
|
|
f"{http_proxy_warning if is_likely_http_proxy and proxy_scheme == 'https' else ''}",
|
|
err,
|
|
)
|
|
new_err.__cause__ = err
|
|
return new_err
|
|
|
|
|
|
def _get_default_user_agent() -> str:
|
|
return f"python-urllib3/{__version__}"
|
|
|
|
|
|
class DummyConnection:
|
|
"""Used to detect a failed ConnectionCls import."""
|
|
|
|
|
|
if not ssl:
|
|
HTTPSConnection = DummyConnection # type: ignore[misc, assignment] # noqa: F811
|
|
|
|
|
|
VerifiedHTTPSConnection = HTTPSConnection
|
|
|
|
|
|
def _url_from_connection(
|
|
conn: HTTPConnection | HTTPSConnection, path: str | None = None
|
|
) -> str:
|
|
"""Returns the URL from a given connection. This is mainly used for testing and logging."""
|
|
|
|
scheme = "https" if isinstance(conn, HTTPSConnection) else "http"
|
|
|
|
return Url(scheme=scheme, host=conn.host, port=conn.port, path=path).url
|
|
|