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import httplib
import xmlrpclib
import socket
import time
import os
import select
import string
import sys
import urllib
import traceback
from OpenSSL import SSL, crypto
def display_traceback():
for line in traceback.format_stack():
print line.strip()
class SecureXMLRPCClient(xmlrpclib.ServerProxy):
def __init__(self, host, port, client_cert, client_key, verify_cert_func=None):
self._transport = SafeTransport(self.__host, client_cert, client_key, verify_cert_func)
xmlrpclib.ServerProxy.__init__(self, "https://" + host + ":" + str(port), transport=self._transport, encoding="utf-8", allow_none=True)
def cancel(self):
self._transport.close()
class SafeTransport(xmlrpclib.Transport):
def __init__(self, host, client_cert, client_key, verify_cert_func=None):
self.__host = host
self.__client_cert = client_cert
self.__client_key = client_key
self.__verify_cert_func = verify_cert_func
def make_connection(self, host):
host, extra_headers, x509 = self.get_host_info(host)
_host, _port = urllib.splitport(host)
self._https = HTTPS(_host, int(_port), self.__client_cert, self.__client_key, self.__verify_cert_func)
return self._https
def close(self):
pass
# print "SafeTransport.close()"
# if self._https:
# self._https.close()
# self._https = None
class HTTPSConnection(httplib.HTTPConnection):
response_class = httplib.HTTPResponse
def __init__(self, host, port=None, cert_file=None, key_file=None, verify_cert_func=None):
httplib.HTTPConnection.__init__(self, host, port, None)
self.verify_cert_func = verify_cert_func
self.cert_file = cert_file
self.key_file = key_file
self.sock = None
def connect(self):
# Initialize context
ctx = SSL.Context(SSL.SSLv23_METHOD)
if self.verify_cert_func:
ctx.set_verify(SSL.VERIFY_PEER, self.verify_cert_func) # Demand a certificate
ctx.use_privatekey_file(self.key_file)
ctx.use_certificate_file(self.cert_file)
# Set up client
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
con = SSL.Connection(ctx, sock)
self.sock = SSLConnection(con)
self.sock.connect((self.host, self.port))
class HTTPS(httplib.HTTP):
_connection_class = HTTPSConnection
def __init__(self, host='', port=None, cert_file=None, key_file=None, verify_cert_func=None):
self._setup(self._connection_class(host, port, cert_file, key_file, verify_cert_func))
# Higher-level SSL objects used by rpclib
#
# Copyright (c) 2002 Red Hat, Inc.
#
# Author: Mihai Ibanescu <misa@redhat.com>
# Modifications by Dan Williams <dcbw@redhat.com>
class SSLConnection:
"""
This whole class exists just to filter out a parameter
passed in to the shutdown() method in SimpleXMLRPC.doPOST()
"""
# DEFAULT_TIMEOUT = 20
DEFAULT_TIMEOUT = 0
def __init__(self, conn):
"""
Connection is not yet a new-style class,
so I'm making a proxy instead of subclassing.
"""
self.__dict__["conn"] = conn
self.__dict__["close_refcount"] = 0
self.__dict__["closed"] = False
self.__dict__["timeout"] = self.DEFAULT_TIMEOUT
def __del__(self):
self.__dict__["conn"].close()
def __getattr__(self,name):
return getattr(self.__dict__["conn"], name)
def __setattr__(self,name, value):
setattr(self.__dict__["conn"], name, value)
def settimeout(self, timeout):
if timeout == None:
self.__dict__["timeout"] = self.DEFAULT_TIMEOUT
else:
self.__dict__["timeout"] = timeout
self.__dict__["conn"].settimeout(timeout)
def shutdown(self, how=1):
"""
SimpleXMLRpcServer.doPOST calls shutdown(1),
and Connection.shutdown() doesn't take
an argument. So we just discard the argument.
"""
self.__dict__["conn"].shutdown()
def accept(self):
"""
This is the other part of the shutdown() workaround.
Since servers create new sockets, we have to infect
them with our magic. :)
"""
c, a = self.__dict__["conn"].accept()
return (SSLConnection(c), a)
def makefile(self, mode, bufsize):
"""
We need to use socket._fileobject Because SSL.Connection
doesn't have a 'dup'. Not exactly sure WHY this is, but
this is backed up by comments in socket.py and SSL/connection.c
Since httplib.HTTPSResponse/HTTPConnection depend on the
socket being duplicated when they close it, we refcount the
socket object and don't actually close until its count is 0.
"""
# display_traceback()
self.__dict__["close_refcount"] = self.__dict__["close_refcount"] + 1
# print "SSLConnection.makefile(): close_refcount=", str(self.__dict__["close_refcount"])
return PlgFileObject(self, mode, bufsize)
def close(self):
# print "SSLConnection.close()"
# display_traceback()
if self.__dict__["closed"]:
return
self.__dict__["close_refcount"] = self.__dict__["close_refcount"] - 1
# print "SSLConnection.close(): close_refcount=", str(self.__dict__["close_refcount"])
if self.__dict__["close_refcount"] == 0:
pass
# print "SSLConnection.close(): close_refcount=0...actually closing"
# self.shutdown()
# self.__dict__["conn"].close()
# self.__dict__["closed"] = True
def sendall(self, data, flags=0):
"""
- Use select() to simulate a socket timeout without setting the socket
to non-blocking mode.
- Don't use pyOpenSSL's sendall() either, since it just loops on WantRead
or WantWrite, consuming 100% CPU, and never times out.
"""
timeout = self.__dict__["timeout"]
con = self.__dict__["conn"]
# (read, write, excpt) = select.select([], [con], [], timeout)
# if not con in write:
# raise socket.timeout((110, "Operation timed out."))
# starttime = time.time()
origlen = len(data)
sent = -1
while len(data):
# curtime = time.time()
# if curtime - starttime > timeout:
# raise socket.timeout((110, "Operation timed out."))
try:
sent = con.send(data, flags)
except SSL.SysCallError, e:
if e[0] == 32: # Broken Pipe
self.close()
sent = 0
else:
raise socket.error(e)
except (SSL.WantWriteError, SSL.WantReadError):
time.sleep(0.2)
continue
data = data[sent:]
return origlen - len(data)
def recv(self, bufsize, flags=0):
# timeout = self.__dict__["timeout"]
con = self.__dict__["conn"]
if self.closed:
# print "socket is closed"
return None
# (read, write, excpt) = select.select([con], [], [], timeout)
# if not con in read:
# raise socket.timeout((110, "Operation timed out."))
# starttime = time.time()
while True:
# curtime = time.time()
# if curtime - starttime > timeout:
# raise socket.timeout((110, "Operation timed out."))
try:
data = con.recv(bufsize, flags)
return data
except SSL.ZeroReturnError:
return None
except SSL.WantReadError:
time.sleep(0.2)
return None
class PlgFileObject(socket._fileobject):
def close(self):
"""
socket._fileobject doesn't actually _close_ the socket,
which we want it to do, so we have to override.
"""
try:
if self._sock:
self.flush()
self._sock.close()
finally:
self._sock = None
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