/usr/lib/python2.7/dist-packages/twext/internet/ssl.py is in calendarserver 5.2+dfsg-1.
This file is owned by root:root, with mode 0o644.
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# Copyright (c) 2005-2014 Apple Inc. All rights reserved.
#
# 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.
##
"""
Extentions to twisted.internet.ssl.
"""
__all__ = [
"ChainingOpenSSLContextFactory",
]
from OpenSSL.SSL import Context as SSLContext, SSLv3_METHOD
from twisted.internet.ssl import DefaultOpenSSLContextFactory
class ChainingOpenSSLContextFactory (DefaultOpenSSLContextFactory):
def __init__(
self, privateKeyFileName, certificateFileName,
sslmethod=SSLv3_METHOD, certificateChainFile=None,
passwdCallback=None, ciphers=None
):
self.certificateChainFile = certificateChainFile
self.passwdCallback = passwdCallback
self.ciphers = ciphers
DefaultOpenSSLContextFactory.__init__(
self,
privateKeyFileName,
certificateFileName,
sslmethod=sslmethod
)
def cacheContext(self):
# Unfortunate code duplication.
ctx = SSLContext(self.sslmethod)
if self.ciphers is not None:
ctx.set_cipher_list(self.ciphers)
if self.passwdCallback is not None:
ctx.set_passwd_cb(self.passwdCallback)
ctx.use_certificate_file(self.certificateFileName)
ctx.use_privatekey_file(self.privateKeyFileName)
if self.certificateChainFile != "":
ctx.use_certificate_chain_file(self.certificateChainFile)
self._context = ctx
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