1 files changed, 102 insertions, 0 deletions
diff --git a/ipalib/plugins/b_xmlrpc.py b/ipalib/plugins/b_xmlrpc.py
new file mode 100644
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+++ b/ipalib/plugins/b_xmlrpc.py
@@ -0,0 +1,102 @@
+# 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):
+    """
+    XML-RPC client backend plugin.
+    """
+
+    def get_client(self):
+        """
+        Return an xmlrpclib.ServerProxy instance (the client).
+        """
+        # FIXME: Rob, is there any reason we can't use allow_none=True here?
+        # Are there any reasonably common XML-RPC client implementations
+        # that don't support the <nil/> extension?
+        # See: http://docs.python.org/library/xmlrpclib.html
+        uri = self.env.xmlrpc_uri
+        if uri.startswith('https://'):
+            return xmlrpclib.ServerProxy(uri,
+                transport=KerbTransport(),
+            )
+        return xmlrpclib.ServerProxy(uri)
+
+    def forward_call(self, name, *args, **kw):
+        """
+        Forward a call over XML-RPC to an IPA server.
+        """
+        self.info('Forwarding %r call to %r' % (name, self.env.xmlrpc_uri))
+        client = self.get_client()
+        command = getattr(client, name)
+        params = xmlrpc_marshal(*args, **kw)
+        try:
+            return command(*params)
+        except socket.error, e:
+            raise
+        except xmlrpclib.Fault, e:
+            err = errors.convertFault(e)
+            raise err
+        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