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# Authors:
# Jason Gerard DeRose <jderose@redhat.com>
# Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2008 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
Backend plugin for XML-RPC client.
This provides a lightwieght XML-RPC client using Python standard library
``xmlrpclib`` module.
"""
import xmlrpclib
import socket
import httplib
import kerberos
from ipalib.backend import Backend
from ipalib.util import xmlrpc_marshal
from ipalib import api
from ipalib import errors
class xmlrpc(Backend):
"""
Kerberos backend plugin.
"""
def get_client(self, verbose=False):
# FIXME: The server uri should come from self.api.env.server_uri
if api.env.get('kerberos'):
server = api.env.server.next()
if verbose: print "Connecting to %s" % server
return xmlrpclib.ServerProxy('https://%s/ipa/xml' % server, transport=KerbTransport(), verbose=verbose)
else:
return xmlrpclib.ServerProxy('http://localhost:8888', verbose=verbose)
def forward_call(self, name, *args, **kw):
"""
Forward a call over XML-RPC to an IPA server.
"""
client = self.get_client(verbose=api.env.get('verbose', False))
command = getattr(client, name)
params = xmlrpc_marshal(*args, **kw)
try:
return command(*params)
except socket.error, e:
print e[1]
except xmlrpclib.Fault, e:
err = errors.convertFault(e)
code = getattr(err,'faultCode',None)
faultString = getattr(err,'faultString',None)
if not code:
raise err
if code < errors.IPA_ERROR_BASE:
print "%s: %s" % (code, faultString)
else:
print "%s: %s" % (code, getattr(err,'__doc__',''))
return {}
api.register(xmlrpc)
class KerbTransport(xmlrpclib.SafeTransport):
"""Handles Kerberos Negotiation authentication to an XML-RPC server."""
def get_host_info(self, host):
host, extra_headers, x509 = xmlrpclib.Transport.get_host_info(self, host)
# Set the remote host principal
h = host
hostinfo = h.split(':')
service = "HTTP@" + hostinfo[0]
try:
rc, vc = kerberos.authGSSClientInit(service);
except kerberos.GSSError, e:
raise kerberos.GSSError(e)
try:
kerberos.authGSSClientStep(vc, "");
except kerberos.GSSError, e:
raise kerberos.GSSError(e)
extra_headers = [
("Authorization", "negotiate %s" % kerberos.authGSSClientResponse(vc) )
]
return host, extra_headers, x509
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