641 lines
28 KiB
Diff
641 lines
28 KiB
Diff
From 27e9b8a48632696311bd8c4af93ec52a49ba5e09 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C5=81ukasz=20Langa?= <lukasz@langa.pl>
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Date: Tue, 22 Aug 2023 19:53:15 +0200
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Subject: [PATCH 1/3] gh-108310: Fix CVE-2023-40217: Check for & avoid the ssl
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pre-close flaw (#108315)
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Instances of `ssl.SSLSocket` were vulnerable to a bypass of the TLS handshake
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and included protections (like certificate verification) and treating sent
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unencrypted data as if it were post-handshake TLS encrypted data.
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The vulnerability is caused when a socket is connected, data is sent by the
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malicious peer and stored in a buffer, and then the malicious peer closes the
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socket within a small timing window before the other peers’ TLS handshake can
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begin. After this sequence of events the closed socket will not immediately
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attempt a TLS handshake due to not being connected but will also allow the
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buffered data to be read as if a successful TLS handshake had occurred.
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Co-authored-by: Gregory P. Smith [Google LLC] <greg@krypto.org>
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-----
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Notable adjustments for Python 2.7:
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Use alternative for self.getblocking(), which was added in Python 3.7
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see: https://docs.python.org/3/library/socket.html#socket.socket.getblocking
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Set self._sslobj early to avoid AttributeError
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Use SSLError where necessary (it is not a subclass of OSError)
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---
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Lib/ssl.py | 32 +++
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Lib/test/test_ssl.py | 210 ++++++++++++++++++
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...-08-22-17-39-12.gh-issue-108310.fVM3sg.rst | 7 +
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3 files changed, 249 insertions(+)
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create mode 100644 Misc/NEWS.d/next/Security/2023-08-22-17-39-12.gh-issue-108310.fVM3sg.rst
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diff --git a/Lib/ssl.py b/Lib/ssl.py
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index 0bb43a4a4de..de9ce6bc134 100644
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--- a/Lib/ssl.py
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+++ b/Lib/ssl.py
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@@ -523,6 +523,7 @@ class SSLSocket(socket):
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server_hostname=None,
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_context=None):
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+ self._sslobj = None
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self._makefile_refs = 0
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if _context:
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self._context = _context
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@@ -573,6 +574,8 @@ class SSLSocket(socket):
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self.do_handshake_on_connect = do_handshake_on_connect
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self.suppress_ragged_eofs = suppress_ragged_eofs
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+ sock_timeout = sock.gettimeout()
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+
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# See if we are connected
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try:
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self.getpeername()
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@@ -580,9 +583,38 @@ class SSLSocket(socket):
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if e.errno != errno.ENOTCONN:
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raise
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connected = False
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+ blocking = (sock.gettimeout() != 0)
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+ self.setblocking(False)
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+ try:
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+ # We are not connected so this is not supposed to block, but
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+ # testing revealed otherwise on macOS and Windows so we do
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+ # the non-blocking dance regardless. Our raise when any data
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+ # is found means consuming the data is harmless.
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+ notconn_pre_handshake_data = self.recv(1)
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+ except socket_error as e:
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+ # EINVAL occurs for recv(1) on non-connected on unix sockets.
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+ if e.errno not in (errno.ENOTCONN, errno.EINVAL):
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+ raise
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+ notconn_pre_handshake_data = b''
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+ self.setblocking(blocking)
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+ if notconn_pre_handshake_data:
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+ # This prevents pending data sent to the socket before it was
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+ # closed from escaping to the caller who could otherwise
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+ # presume it came through a successful TLS connection.
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+ reason = "Closed before TLS handshake with data in recv buffer"
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+ notconn_pre_handshake_data_error = SSLError(e.errno, reason)
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+ # Add the SSLError attributes that _ssl.c always adds.
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+ notconn_pre_handshake_data_error.reason = reason
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+ notconn_pre_handshake_data_error.library = None
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+ try:
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+ self.close()
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+ except OSError:
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+ pass
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+ raise notconn_pre_handshake_data_error
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else:
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connected = True
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+ self.settimeout(sock_timeout) # Must come after setblocking() calls.
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self._closed = False
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self._sslobj = None
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self._connected = connected
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diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
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index ef2e59c1d15..fd657761a05 100644
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--- a/Lib/test/test_ssl.py
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+++ b/Lib/test/test_ssl.py
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@@ -8,9 +8,11 @@ from test.script_helper import assert_python_ok
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import asyncore
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import socket
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import select
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+import struct
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import time
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import datetime
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import gc
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+import httplib
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import os
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import errno
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import pprint
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@@ -3240,6 +3242,213 @@ else:
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self.assertRaises(ValueError, s.read, 1024)
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self.assertRaises(ValueError, s.write, b'hello')
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+def set_socket_so_linger_on_with_zero_timeout(sock):
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+ sock.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, struct.pack('ii', 1, 0))
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+
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+
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+class TestPreHandshakeClose(unittest.TestCase):
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+ """Verify behavior of close sockets with received data before to the handshake.
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+ """
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+
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+ class SingleConnectionTestServerThread(threading.Thread):
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+
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+ def __init__(self, name, call_after_accept):
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+ self.call_after_accept = call_after_accept
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+ self.received_data = b'' # set by .run()
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+ self.wrap_error = None # set by .run()
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+ self.listener = None # set by .start()
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+ self.port = None # set by .start()
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+ threading.Thread.__init__(self, name=name)
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+
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+ def __enter__(self):
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+ self.start()
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+ return self
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+
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+ def __exit__(self, *args):
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+ try:
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+ if self.listener:
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+ self.listener.close()
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+ except ssl.SSLError:
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+ pass
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+ self.join()
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+ self.wrap_error = None # avoid dangling references
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+
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+ def start(self):
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+ self.ssl_ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
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+ self.ssl_ctx.verify_mode = ssl.CERT_REQUIRED
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+ self.ssl_ctx.load_verify_locations(cafile=ONLYCERT)
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+ self.ssl_ctx.load_cert_chain(certfile=ONLYCERT, keyfile=ONLYKEY)
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+ self.listener = socket.socket()
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+ self.port = support.bind_port(self.listener)
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+ self.listener.settimeout(2.0)
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+ self.listener.listen(1)
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+ threading.Thread.start(self)
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+
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+ def run(self):
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+ conn, address = self.listener.accept()
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+ self.listener.close()
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+ with closing(conn):
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+ if self.call_after_accept(conn):
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+ return
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+ try:
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+ tls_socket = self.ssl_ctx.wrap_socket(conn, server_side=True)
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+ except ssl.SSLError as err:
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+ self.wrap_error = err
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+ else:
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+ try:
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+ self.received_data = tls_socket.recv(400)
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+ except OSError:
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+ pass # closed, protocol error, etc.
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+
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+ def non_linux_skip_if_other_okay_error(self, err):
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+ if sys.platform == "linux":
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+ return # Expect the full test setup to always work on Linux.
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+ if (isinstance(err, ConnectionResetError) or
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+ (isinstance(err, OSError) and err.errno == errno.EINVAL) or
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+ re.search('wrong.version.number', getattr(err, "reason", ""), re.I)):
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+ # On Windows the TCP RST leads to a ConnectionResetError
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+ # (ECONNRESET) which Linux doesn't appear to surface to userspace.
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+ # If wrap_socket() winds up on the "if connected:" path and doing
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+ # the actual wrapping... we get an SSLError from OpenSSL. Typically
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+ # WRONG_VERSION_NUMBER. While appropriate, neither is the scenario
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+ # we're specifically trying to test. The way this test is written
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+ # is known to work on Linux. We'll skip it anywhere else that it
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+ # does not present as doing so.
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+ self.skipTest("Could not recreate conditions on {}: \
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+ err={}".format(sys.platform,err))
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+ # If maintaining this conditional winds up being a problem.
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+ # just turn this into an unconditional skip anything but Linux.
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+ # The important thing is that our CI has the logic covered.
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+
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+ def test_preauth_data_to_tls_server(self):
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+ server_accept_called = threading.Event()
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+ ready_for_server_wrap_socket = threading.Event()
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+
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+ def call_after_accept(unused):
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+ server_accept_called.set()
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+ if not ready_for_server_wrap_socket.wait(2.0):
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+ raise RuntimeError("wrap_socket event never set, test may fail.")
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+ return False # Tell the server thread to continue.
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+
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+ server = self.SingleConnectionTestServerThread(
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+ call_after_accept=call_after_accept,
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+ name="preauth_data_to_tls_server")
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+ server.__enter__() # starts it
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+ self.addCleanup(server.__exit__) # ... & unittest.TestCase stops it.
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+
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+ with closing(socket.socket()) as client:
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+ client.connect(server.listener.getsockname())
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+ # This forces an immediate connection close via RST on .close().
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+ set_socket_so_linger_on_with_zero_timeout(client)
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+ client.setblocking(False)
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+
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+ server_accept_called.wait()
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+ client.send(b"DELETE /data HTTP/1.0\r\n\r\n")
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+ client.close() # RST
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+
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+ ready_for_server_wrap_socket.set()
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+ server.join()
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+ wrap_error = server.wrap_error
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+ self.assertEqual(b"", server.received_data)
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+ self.assertIsInstance(wrap_error, ssl.SSLError)
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+ self.assertIn("before TLS handshake with data", wrap_error.args[1])
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+ self.assertIn("before TLS handshake with data", wrap_error.reason)
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+ self.assertNotEqual(0, wrap_error.args[0])
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+ self.assertIsNone(wrap_error.library, msg="attr must exist")
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+
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+ def test_preauth_data_to_tls_client(self):
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+ client_can_continue_with_wrap_socket = threading.Event()
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+
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+ def call_after_accept(conn_to_client):
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+ # This forces an immediate connection close via RST on .close().
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+ set_socket_so_linger_on_with_zero_timeout(conn_to_client)
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+ conn_to_client.send(
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+ b"HTTP/1.0 307 Temporary Redirect\r\n"
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+ b"Location: https://example.com/someone-elses-server\r\n"
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+ b"\r\n")
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+ conn_to_client.close() # RST
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+ client_can_continue_with_wrap_socket.set()
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+ return True # Tell the server to stop.
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+
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+ server = self.SingleConnectionTestServerThread(
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+ call_after_accept=call_after_accept,
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+ name="preauth_data_to_tls_client")
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+ server.__enter__() # starts it
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+ self.addCleanup(server.__exit__) # ... & unittest.TestCase stops it.
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+
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+ # Redundant; call_after_accept sets SO_LINGER on the accepted conn.
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+ set_socket_so_linger_on_with_zero_timeout(server.listener)
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+
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+ with closing(socket.socket()) as client:
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+ client.connect(server.listener.getsockname())
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+ if not client_can_continue_with_wrap_socket.wait(2.0):
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+ self.fail("test server took too long.")
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+ ssl_ctx = ssl.create_default_context()
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+ try:
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+ tls_client = ssl_ctx.wrap_socket(
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+ client, server_hostname="localhost")
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+ except ssl.SSLError as err:
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+ wrap_error = err
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+ received_data = b""
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+ else:
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+ wrap_error = None
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+ received_data = tls_client.recv(400)
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+ tls_client.close()
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+
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+ server.join()
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+ self.assertEqual(b"", received_data)
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+ self.assertIsInstance(wrap_error, ssl.SSLError)
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+ self.assertIn("before TLS handshake with data", wrap_error.args[1])
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+ self.assertIn("before TLS handshake with data", wrap_error.reason)
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+ self.assertNotEqual(0, wrap_error.args[0])
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+ self.assertIsNone(wrap_error.library, msg="attr must exist")
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+
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+ def test_https_client_non_tls_response_ignored(self):
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+
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+ server_responding = threading.Event()
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+
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+ class SynchronizedHTTPSConnection(httplib.HTTPSConnection):
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+ def connect(self):
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+ httplib.HTTPConnection.connect(self)
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+ # Wait for our fault injection server to have done its thing.
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+ if not server_responding.wait(1.0) and support.verbose:
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+ sys.stdout.write("server_responding event never set.")
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+ self.sock = self._context.wrap_socket(
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+ self.sock, server_hostname=self.host)
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+
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+ def call_after_accept(conn_to_client):
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+ # This forces an immediate connection close via RST on .close().
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+ set_socket_so_linger_on_with_zero_timeout(conn_to_client)
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+ conn_to_client.send(
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+ b"HTTP/1.0 402 Payment Required\r\n"
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+ b"\r\n")
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+ conn_to_client.close() # RST
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+ server_responding.set()
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+ return True # Tell the server to stop.
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+
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+ server = self.SingleConnectionTestServerThread(
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+ call_after_accept=call_after_accept,
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+ name="non_tls_http_RST_responder")
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+ server.__enter__() # starts it
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+ self.addCleanup(server.__exit__) # ... & unittest.TestCase stops it.
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+ # Redundant; call_after_accept sets SO_LINGER on the accepted conn.
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+ set_socket_so_linger_on_with_zero_timeout(server.listener)
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+
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+ connection = SynchronizedHTTPSConnection(
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+ "localhost",
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+ port=server.port,
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+ context=ssl.create_default_context(),
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+ timeout=2.0,
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+ )
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+ # There are lots of reasons this raises as desired, long before this
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+ # test was added. Sending the request requires a successful TLS wrapped
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+ # socket; that fails if the connection is broken. It may seem pointless
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+ # to test this. It serves as an illustration of something that we never
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+ # want to happen... properly not happening.
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+ with self.assertRaises(ssl.SSLError) as err_ctx:
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+ connection.request("HEAD", "/test", headers={"Host": "localhost"})
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+ response = connection.getresponse()
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+
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def test_main(verbose=False):
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if support.verbose:
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@@ -3274,6 +3483,7 @@ def test_main(verbose=False):
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raise support.TestFailed("Can't read certificate file %r" % filename)
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tests = [ContextTests, BasicTests, BasicSocketTests, SSLErrorTests]
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+ tests += [TestPreHandshakeClose]
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if support.is_resource_enabled('network'):
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tests.append(NetworkedTests)
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diff --git a/Misc/NEWS.d/next/Security/2023-08-22-17-39-12.gh-issue-108310.fVM3sg.rst b/Misc/NEWS.d/next/Security/2023-08-22-17-39-12.gh-issue-108310.fVM3sg.rst
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new file mode 100644
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index 00000000000..403c77a9d48
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--- /dev/null
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+++ b/Misc/NEWS.d/next/Security/2023-08-22-17-39-12.gh-issue-108310.fVM3sg.rst
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@@ -0,0 +1,7 @@
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+Fixed an issue where instances of :class:`ssl.SSLSocket` were vulnerable to
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+a bypass of the TLS handshake and included protections (like certificate
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+verification) and treating sent unencrypted data as if it were
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+post-handshake TLS encrypted data. Security issue reported as
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+`CVE-2023-40217
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+<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40217>`_ by
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+Aapo Oksman. Patch by Gregory P. Smith.
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--
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2.41.0
|
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|
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|
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From 8ea38387426d3d2dd4c38f5ab7c26ee0ab0fb242 Mon Sep 17 00:00:00 2001
|
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From: "Miss Islington (bot)"
|
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<31488909+miss-islington@users.noreply.github.com>
|
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Date: Wed, 23 Aug 2023 03:10:56 -0700
|
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Subject: [PATCH 2/3] gh-108342: Break ref cycle in SSLSocket._create() exc
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(GH-108344) (#108352)
|
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Explicitly break a reference cycle when SSLSocket._create() raises an
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exception. Clear the variable storing the exception, since the
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exception traceback contains the variables and so creates a reference
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cycle.
|
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|
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This test leak was introduced by the test added for the fix of GH-108310.
|
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(cherry picked from commit 64f99350351bc46e016b2286f36ba7cd669b79e3)
|
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|
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Co-authored-by: Victor Stinner <vstinner@python.org>
|
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---
|
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Lib/ssl.py | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
|
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|
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diff --git a/Lib/ssl.py b/Lib/ssl.py
|
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index de9ce6bc134..ac734b4f2ad 100644
|
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--- a/Lib/ssl.py
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+++ b/Lib/ssl.py
|
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@@ -610,7 +610,11 @@ class SSLSocket(socket):
|
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self.close()
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except OSError:
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pass
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- raise notconn_pre_handshake_data_error
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+ try:
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+ raise notconn_pre_handshake_data_error
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+ finally:
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+ # Explicitly break the reference cycle.
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+ notconn_pre_handshake_data_error = None
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else:
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connected = True
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--
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2.41.0
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|
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From 845491ee514d6489466664aeef377fe9155f8e83 Mon Sep 17 00:00:00 2001
|
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From: =?UTF-8?q?=C5=81ukasz=20Langa?= <lukasz@langa.pl>
|
||
Date: Thu, 24 Aug 2023 12:09:30 +0200
|
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Subject: [PATCH 3/3] [3.8] gh-108342: Make ssl TestPreHandshakeClose more
|
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reliable (GH-108370) (#108408)
|
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* In preauth tests of test_ssl, explicitly break reference cycles
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invoving SingleConnectionTestServerThread to make sure that the
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thread is deleted. Otherwise, the test marks the environment as
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altered because the threading module sees a "dangling thread"
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(SingleConnectionTestServerThread). This test leak was introduced
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by the test added for the fix of issue gh-108310.
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* Use support.SHORT_TIMEOUT instead of hardcoded 1.0 or 2.0 seconds
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timeout.
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* SingleConnectionTestServerThread.run() catchs TimeoutError
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* Fix a race condition (missing synchronization) in
|
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test_preauth_data_to_tls_client(): the server now waits until the
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client connect() completed in call_after_accept().
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* test_https_client_non_tls_response_ignored() calls server.join()
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explicitly.
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* Replace "localhost" with server.listener.getsockname()[0].
|
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(cherry picked from commit 592bacb6fc0833336c0453e818e9b95016e9fd47)
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---
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Lib/test/support/__init__.py | 2 +
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Lib/test/test_ssl.py | 105 ++++++++++++++++++++---------------
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2 files changed, 62 insertions(+), 45 deletions(-)
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diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
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index ccc11c1b4b0..d6ee9934f04 100644
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--- a/Lib/test/support/__init__.py
|
||
+++ b/Lib/test/support/__init__.py
|
||
@@ -47,6 +47,8 @@ __all__ = ["Error", "TestFailed", "TestDidNotRun", "ResourceDenied", "import_mod
|
||
"strip_python_stderr", "IPV6_ENABLED", "run_with_tz",
|
||
"SuppressCrashReport"]
|
||
|
||
+SHORT_TIMEOUT = 30.0 # Added to make backporting from 3.x easier
|
||
+
|
||
class Error(Exception):
|
||
"""Base class for regression test exceptions."""
|
||
|
||
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
|
||
index fd657761a05..0f5aa37a0c1 100644
|
||
--- a/Lib/test/test_ssl.py
|
||
+++ b/Lib/test/test_ssl.py
|
||
@@ -3252,12 +3252,16 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
|
||
class SingleConnectionTestServerThread(threading.Thread):
|
||
|
||
- def __init__(self, name, call_after_accept):
|
||
+ def __init__(self, name, call_after_accept, timeout=None):
|
||
self.call_after_accept = call_after_accept
|
||
self.received_data = b'' # set by .run()
|
||
self.wrap_error = None # set by .run()
|
||
self.listener = None # set by .start()
|
||
self.port = None # set by .start()
|
||
+ if timeout is None:
|
||
+ self.timeout = support.SHORT_TIMEOUT
|
||
+ else:
|
||
+ self.timeout = timeout
|
||
threading.Thread.__init__(self, name=name)
|
||
|
||
def __enter__(self):
|
||
@@ -3280,13 +3284,22 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
self.ssl_ctx.load_cert_chain(certfile=ONLYCERT, keyfile=ONLYKEY)
|
||
self.listener = socket.socket()
|
||
self.port = support.bind_port(self.listener)
|
||
- self.listener.settimeout(2.0)
|
||
+ self.listener.settimeout(self.timeout)
|
||
self.listener.listen(1)
|
||
threading.Thread.start(self)
|
||
|
||
def run(self):
|
||
- conn, address = self.listener.accept()
|
||
- self.listener.close()
|
||
+ try:
|
||
+ conn, address = self.listener.accept()
|
||
+ except OSError as e:
|
||
+ if e.errno == errno.ETIMEDOUT:
|
||
+ # on timeout, just close the listener
|
||
+ return
|
||
+ else:
|
||
+ raise
|
||
+ finally:
|
||
+ self.listener.close()
|
||
+
|
||
with closing(conn):
|
||
if self.call_after_accept(conn):
|
||
return
|
||
@@ -3300,33 +3313,13 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
except OSError:
|
||
pass # closed, protocol error, etc.
|
||
|
||
- def non_linux_skip_if_other_okay_error(self, err):
|
||
- if sys.platform == "linux":
|
||
- return # Expect the full test setup to always work on Linux.
|
||
- if (isinstance(err, ConnectionResetError) or
|
||
- (isinstance(err, OSError) and err.errno == errno.EINVAL) or
|
||
- re.search('wrong.version.number', getattr(err, "reason", ""), re.I)):
|
||
- # On Windows the TCP RST leads to a ConnectionResetError
|
||
- # (ECONNRESET) which Linux doesn't appear to surface to userspace.
|
||
- # If wrap_socket() winds up on the "if connected:" path and doing
|
||
- # the actual wrapping... we get an SSLError from OpenSSL. Typically
|
||
- # WRONG_VERSION_NUMBER. While appropriate, neither is the scenario
|
||
- # we're specifically trying to test. The way this test is written
|
||
- # is known to work on Linux. We'll skip it anywhere else that it
|
||
- # does not present as doing so.
|
||
- self.skipTest("Could not recreate conditions on {}: \
|
||
- err={}".format(sys.platform,err))
|
||
- # If maintaining this conditional winds up being a problem.
|
||
- # just turn this into an unconditional skip anything but Linux.
|
||
- # The important thing is that our CI has the logic covered.
|
||
-
|
||
def test_preauth_data_to_tls_server(self):
|
||
server_accept_called = threading.Event()
|
||
ready_for_server_wrap_socket = threading.Event()
|
||
|
||
def call_after_accept(unused):
|
||
server_accept_called.set()
|
||
- if not ready_for_server_wrap_socket.wait(2.0):
|
||
+ if not ready_for_server_wrap_socket.wait(support.SHORT_TIMEOUT):
|
||
raise RuntimeError("wrap_socket event never set, test may fail.")
|
||
return False # Tell the server thread to continue.
|
||
|
||
@@ -3348,18 +3341,28 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
|
||
ready_for_server_wrap_socket.set()
|
||
server.join()
|
||
+
|
||
wrap_error = server.wrap_error
|
||
- self.assertEqual(b"", server.received_data)
|
||
- self.assertIsInstance(wrap_error, ssl.SSLError)
|
||
- self.assertIn("before TLS handshake with data", wrap_error.args[1])
|
||
- self.assertIn("before TLS handshake with data", wrap_error.reason)
|
||
- self.assertNotEqual(0, wrap_error.args[0])
|
||
- self.assertIsNone(wrap_error.library, msg="attr must exist")
|
||
+ try:
|
||
+ self.assertEqual(b"", server.received_data)
|
||
+ self.assertIsInstance(wrap_error, ssl.SSLError)
|
||
+ self.assertIn("before TLS handshake with data", wrap_error.args[1])
|
||
+ self.assertIn("before TLS handshake with data", wrap_error.reason)
|
||
+ self.assertNotEqual(0, wrap_error.args[0])
|
||
+ self.assertIsNone(wrap_error.library, msg="attr must exist")
|
||
+ finally:
|
||
+ # gh-108342: Explicitly break the reference cycle
|
||
+ wrap_error = None
|
||
+ server = None
|
||
|
||
def test_preauth_data_to_tls_client(self):
|
||
+ server_can_continue_with_wrap_socket = threading.Event()
|
||
client_can_continue_with_wrap_socket = threading.Event()
|
||
|
||
def call_after_accept(conn_to_client):
|
||
+ if not server_can_continue_with_wrap_socket.wait(support.SHORT_TIMEOUT):
|
||
+ print("ERROR: test client took too long")
|
||
+
|
||
# This forces an immediate connection close via RST on .close().
|
||
set_socket_so_linger_on_with_zero_timeout(conn_to_client)
|
||
conn_to_client.send(
|
||
@@ -3381,8 +3384,10 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
|
||
with closing(socket.socket()) as client:
|
||
client.connect(server.listener.getsockname())
|
||
- if not client_can_continue_with_wrap_socket.wait(2.0):
|
||
- self.fail("test server took too long.")
|
||
+ server_can_continue_with_wrap_socket.set()
|
||
+
|
||
+ if not client_can_continue_with_wrap_socket.wait(support.SHORT_TIMEOUT):
|
||
+ self.fail("test server took too long")
|
||
ssl_ctx = ssl.create_default_context()
|
||
try:
|
||
tls_client = ssl_ctx.wrap_socket(
|
||
@@ -3396,22 +3401,29 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
tls_client.close()
|
||
|
||
server.join()
|
||
- self.assertEqual(b"", received_data)
|
||
- self.assertIsInstance(wrap_error, ssl.SSLError)
|
||
- self.assertIn("before TLS handshake with data", wrap_error.args[1])
|
||
- self.assertIn("before TLS handshake with data", wrap_error.reason)
|
||
- self.assertNotEqual(0, wrap_error.args[0])
|
||
- self.assertIsNone(wrap_error.library, msg="attr must exist")
|
||
+ try:
|
||
+ self.assertEqual(b"", received_data)
|
||
+ self.assertIsInstance(wrap_error, ssl.SSLError)
|
||
+ self.assertIn("before TLS handshake with data", wrap_error.args[1])
|
||
+ self.assertIn("before TLS handshake with data", wrap_error.reason)
|
||
+ self.assertNotEqual(0, wrap_error.args[0])
|
||
+ self.assertIsNone(wrap_error.library, msg="attr must exist")
|
||
+ finally:
|
||
+ # gh-108342: Explicitly break the reference cycle
|
||
+ wrap_error = None
|
||
+ server = None
|
||
|
||
def test_https_client_non_tls_response_ignored(self):
|
||
-
|
||
server_responding = threading.Event()
|
||
|
||
class SynchronizedHTTPSConnection(httplib.HTTPSConnection):
|
||
def connect(self):
|
||
+ # Call clear text HTTP connect(), not the encrypted HTTPS (TLS)
|
||
+ # connect(): wrap_socket() is called manually below.
|
||
httplib.HTTPConnection.connect(self)
|
||
+
|
||
# Wait for our fault injection server to have done its thing.
|
||
- if not server_responding.wait(1.0) and support.verbose:
|
||
+ if not server_responding.wait(support.SHORT_TIMEOUT) and support.verbose:
|
||
sys.stdout.write("server_responding event never set.")
|
||
self.sock = self._context.wrap_socket(
|
||
self.sock, server_hostname=self.host)
|
||
@@ -3426,29 +3438,32 @@ class TestPreHandshakeClose(unittest.TestCase):
|
||
server_responding.set()
|
||
return True # Tell the server to stop.
|
||
|
||
+ timeout = 2.0
|
||
server = self.SingleConnectionTestServerThread(
|
||
call_after_accept=call_after_accept,
|
||
- name="non_tls_http_RST_responder")
|
||
+ name="non_tls_http_RST_responder",
|
||
+ timeout=timeout)
|
||
server.__enter__() # starts it
|
||
self.addCleanup(server.__exit__) # ... & unittest.TestCase stops it.
|
||
# Redundant; call_after_accept sets SO_LINGER on the accepted conn.
|
||
set_socket_so_linger_on_with_zero_timeout(server.listener)
|
||
|
||
connection = SynchronizedHTTPSConnection(
|
||
- "localhost",
|
||
+ server.listener.getsockname()[0],
|
||
port=server.port,
|
||
context=ssl.create_default_context(),
|
||
- timeout=2.0,
|
||
+ timeout=timeout,
|
||
)
|
||
# There are lots of reasons this raises as desired, long before this
|
||
# test was added. Sending the request requires a successful TLS wrapped
|
||
# socket; that fails if the connection is broken. It may seem pointless
|
||
# to test this. It serves as an illustration of something that we never
|
||
# want to happen... properly not happening.
|
||
- with self.assertRaises(ssl.SSLError) as err_ctx:
|
||
+ with self.assertRaises(ssl.SSLError):
|
||
connection.request("HEAD", "/test", headers={"Host": "localhost"})
|
||
response = connection.getresponse()
|
||
|
||
+ server.join()
|
||
|
||
def test_main(verbose=False):
|
||
if support.verbose:
|
||
--
|
||
2.41.0
|