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103 lines
3.1 KiB
Python
103 lines
3.1 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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# Rob Crittenden <rcritten@redhat.com>
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#
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# Copyright (C) 2008 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 only
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""
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Backend plugin for XML-RPC client.
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This provides a lightwieght XML-RPC client using Python standard library
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``xmlrpclib`` module.
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"""
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import xmlrpclib
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import socket
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import httplib
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import kerberos
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from ipalib.backend import Backend
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from ipalib.util import xmlrpc_marshal
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from ipalib import api
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from ipalib import errors
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class xmlrpc(Backend):
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"""
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XML-RPC client backend plugin.
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"""
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def get_client(self):
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"""
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Return an xmlrpclib.ServerProxy instance (the client).
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"""
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# FIXME: Rob, is there any reason we can't use allow_none=True here?
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# Are there any reasonably common XML-RPC client implementations
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# that don't support the <nil/> extension?
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# See: http://docs.python.org/library/xmlrpclib.html
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uri = self.env.xmlrpc_uri
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if uri.startswith('https://'):
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return xmlrpclib.ServerProxy(uri,
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transport=KerbTransport(),
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)
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return xmlrpclib.ServerProxy(uri)
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def forward_call(self, name, *args, **kw):
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"""
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Forward a call over XML-RPC to an IPA server.
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"""
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self.info('Forwarding %r call to %r' % (name, self.env.xmlrpc_uri))
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client = self.get_client()
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command = getattr(client, name)
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params = xmlrpc_marshal(*args, **kw)
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try:
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return command(*params)
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except socket.error, e:
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raise
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except xmlrpclib.Fault, e:
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err = errors.convertFault(e)
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raise err
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return
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api.register(xmlrpc)
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class KerbTransport(xmlrpclib.SafeTransport):
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"""Handles Kerberos Negotiation authentication to an XML-RPC server."""
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def get_host_info(self, host):
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host, extra_headers, x509 = xmlrpclib.Transport.get_host_info(self, host)
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# Set the remote host principal
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h = host
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hostinfo = h.split(':')
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service = "HTTP@" + hostinfo[0]
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try:
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rc, vc = kerberos.authGSSClientInit(service);
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except kerberos.GSSError, e:
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raise kerberos.GSSError(e)
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try:
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kerberos.authGSSClientStep(vc, "");
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except kerberos.GSSError, e:
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raise kerberos.GSSError(e)
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extra_headers = [
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("Authorization", "negotiate %s" % kerberos.authGSSClientResponse(vc) )
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]
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return host, extra_headers, x509
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