mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-26 12:16:12 +00:00
129 lines
4.2 KiB
Python
129 lines
4.2 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
import logging
|
|
|
|
from zope.interface import implementer
|
|
|
|
from OpenSSL import SSL, crypto
|
|
from twisted.internet._sslverify import _defaultCurveName
|
|
from twisted.internet.interfaces import IOpenSSLClientConnectionCreator
|
|
from twisted.internet.ssl import CertificateOptions, ContextFactory
|
|
from twisted.python.failure import Failure
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class ServerContextFactory(ContextFactory):
|
|
"""Factory for PyOpenSSL SSL contexts that are used to handle incoming
|
|
connections."""
|
|
|
|
def __init__(self, config):
|
|
self._context = SSL.Context(SSL.SSLv23_METHOD)
|
|
self.configure_context(self._context, config)
|
|
|
|
@staticmethod
|
|
def configure_context(context, config):
|
|
try:
|
|
_ecCurve = crypto.get_elliptic_curve(_defaultCurveName)
|
|
context.set_tmp_ecdh(_ecCurve)
|
|
|
|
except Exception:
|
|
logger.exception("Failed to enable elliptic curve for TLS")
|
|
context.set_options(SSL.OP_NO_SSLv2 | SSL.OP_NO_SSLv3)
|
|
context.use_certificate_chain_file(config.tls_certificate_file)
|
|
|
|
if not config.no_tls:
|
|
context.use_privatekey(config.tls_private_key)
|
|
|
|
context.load_tmp_dh(config.tls_dh_params_path)
|
|
context.set_cipher_list("!ADH:HIGH+kEDH:!AECDH:HIGH+kEECDH")
|
|
|
|
def getContext(self):
|
|
return self._context
|
|
|
|
|
|
def _idnaBytes(text):
|
|
"""
|
|
Convert some text typed by a human into some ASCII bytes. This is a
|
|
copy of twisted.internet._idna._idnaBytes. For documentation, see the
|
|
twisted documentation.
|
|
"""
|
|
try:
|
|
import idna
|
|
except ImportError:
|
|
return text.encode("idna")
|
|
else:
|
|
return idna.encode(text)
|
|
|
|
|
|
def _tolerateErrors(wrapped):
|
|
"""
|
|
Wrap up an info_callback for pyOpenSSL so that if something goes wrong
|
|
the error is immediately logged and the connection is dropped if possible.
|
|
This is a copy of twisted.internet._sslverify._tolerateErrors. For
|
|
documentation, see the twisted documentation.
|
|
"""
|
|
|
|
def infoCallback(connection, where, ret):
|
|
try:
|
|
return wrapped(connection, where, ret)
|
|
except: # noqa: E722, taken from the twisted implementation
|
|
f = Failure()
|
|
logger.exception("Error during info_callback")
|
|
connection.get_app_data().failVerification(f)
|
|
|
|
return infoCallback
|
|
|
|
|
|
@implementer(IOpenSSLClientConnectionCreator)
|
|
class ClientTLSOptions(object):
|
|
"""
|
|
Client creator for TLS without certificate identity verification. This is a
|
|
copy of twisted.internet._sslverify.ClientTLSOptions with the identity
|
|
verification left out. For documentation, see the twisted documentation.
|
|
"""
|
|
|
|
def __init__(self, hostname, ctx):
|
|
self._ctx = ctx
|
|
self._hostname = hostname
|
|
self._hostnameBytes = _idnaBytes(hostname)
|
|
ctx.set_info_callback(
|
|
_tolerateErrors(self._identityVerifyingInfoCallback)
|
|
)
|
|
|
|
def clientConnectionForTLS(self, tlsProtocol):
|
|
context = self._ctx
|
|
connection = SSL.Connection(context, None)
|
|
connection.set_app_data(tlsProtocol)
|
|
return connection
|
|
|
|
def _identityVerifyingInfoCallback(self, connection, where, ret):
|
|
if where & SSL.SSL_CB_HANDSHAKE_START:
|
|
connection.set_tlsext_host_name(self._hostnameBytes)
|
|
|
|
|
|
class ClientTLSOptionsFactory(object):
|
|
"""Factory for Twisted ClientTLSOptions that are used to make connections
|
|
to remote servers for federation."""
|
|
|
|
def __init__(self, config):
|
|
# We don't use config options yet
|
|
pass
|
|
|
|
def get_options(self, host):
|
|
return ClientTLSOptions(
|
|
host,
|
|
CertificateOptions(verify=False).getContext()
|
|
)
|