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# Copyright (c) 2013 OpenStack, LLC.
#
# 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.
"""
HTTPS/SSL related functionality
"""
import socket
from httplib import HTTPSConnection
import OpenSSL
try:
from eventlet.green.OpenSSL.SSL import GreenConnection
from eventlet.greenio import GreenSocket
from eventlet.patcher import is_monkey_patched
def getsockopt(self, *args, **kwargs):
return self.fd.getsockopt(*args, **kwargs)
# The above is a workaround for an eventlet bug in getsockopt.
# TODO(mclaren): Workaround can be removed when this fix lands:
# https://bitbucket.org/eventlet/eventlet/commits/609f230
GreenSocket.getsockopt = getsockopt
except ImportError:
def is_monkey_patched(*args):
return False
class HTTPSConnectionNoSSLComp(HTTPSConnection):
"""
Extended HTTPSConnection which uses the OpenSSL library
for disabling SSL compression.
Note: This functionality can eventually be replaced
with native Python 3.3 code.
"""
def __init__(self, host):
HTTPSConnection.__init__(self, host)
self.setcontext()
def setcontext(self):
"""
Set up the OpenSSL context.
"""
self.context = OpenSSL.SSL.Context(OpenSSL.SSL.SSLv23_METHOD)
# Disable SSL layer compression.
self.context.set_options(0x20000) # SSL_OP_NO_COMPRESSION
def connect(self):
"""
Connect to an SSL port using the OpenSSL library and apply
per-connection parameters.
"""
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock = OpenSSLConnectionDelegator(self.context, sock)
self.sock.connect((self.host, self.port))
class OpenSSLConnectionDelegator(object):
"""
An OpenSSL.SSL.Connection delegator.
Supplies an additional 'makefile' method which httplib requires
and is not present in OpenSSL.SSL.Connection.
Note: Since it is not possible to inherit from OpenSSL.SSL.Connection
a delegator must be used.
"""
def __init__(self, *args, **kwargs):
if is_monkey_patched('socket'):
# If we are running in a monkey patched environment
# use eventlet's GreenConnection -- it handles eventlet's
# non-blocking sockets correctly.
Connection = GreenConnection
else:
Connection = OpenSSL.SSL.Connection
self.connection = Connection(*args, **kwargs)
def __getattr__(self, name):
return getattr(self.connection, name)
def makefile(self, *args, **kwargs):
return socket._fileobject(self.connection, *args, **kwargs)
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