1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
'''Cobalt component base classes'''
__revision__ = '$Revision$'
from M2Crypto import SSL
import cPickle, logging, socket, urlparse, xmlrpclib, ConfigParser, SimpleXMLRPCServer
class CobaltXMLRPCRequestHandler(SimpleXMLRPCServer.SimpleXMLRPCRequestHandler):
'''CobaltXMLRPCRequestHandler takes care of ssl xmlrpc requests'''
def __init__(self, request, client_address, server):
SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.__init__(self,
request, client_address, server)
self.logger = logging.getLogger('Bcfg2.Server.Handler')
def finish(self):
'''Finish HTTPS connections properly'''
self.request.set_shutdown(SSL.SSL_RECEIVED_SHUTDOWN | SSL.SSL_SENT_SHUTDOWN)
self.request.close()
def do_POST(self):
'''Overload do_POST to pass through client address information'''
try:
# get arguments
data = self.rfile.read(int(self.headers["content-length"]))
response = self.server._cobalt_marshalled_dispatch(data, self.client_address)
except: # This should only happen if the module is buggy
# internal error, report as HTTP server error
self.logger.error("Unexpected failure in handler", exc_info=1)
self.send_response(500)
self.end_headers()
else:
# got a valid XML RPC response
self.send_response(200)
self.send_header("Content-type", "text/xml")
self.send_header("Content-length", str(len(response)))
self.end_headers()
self.wfile.write(response)
# shut down the connection
self.wfile.flush()
self.connection.shutdown(1)
class Component(SSL.SSLServer,
SimpleXMLRPCServer.SimpleXMLRPCDispatcher):
"""Cobalt component providing XML-RPC access"""
__name__ = 'Component'
__implementation__ = 'Generic'
__statefields__ = []
def __init__(self, setup):
# need to get addr
self.setup = setup
self.cfile = ConfigParser.ConfigParser()
self.logger = logging.getLogger('Bcfg2.Server')
if setup['configfile']:
cfilename = setup['configfile']
else:
cfilename = '/etc/cobalt.conf'
self.cfile.read([cfilename])
if not self.cfile.has_section('communication'):
print "Configfile missing communication section"
raise SystemExit, 1
self.static = False
if not self.cfile.has_section('components'):
print "Configfile missing components section"
raise SystemExit, 1
if self.cfile._sections['components'].has_key(self.__name__):
self.static = True
location = urlparse.urlparse(self.cfile.get('components', self.__name__))[1].split(':')
location = (location[0], int(location[1]))
else:
location = (socket.gethostname(), 0)
self.password = self.cfile.get('communication', 'password')
sslctx = SSL.Context('sslv23')
try:
keyfile = self.cfile.get('communication', 'key')
except ConfigParser.NoOptionError:
print "No key specified in cobalt.conf"
raise SystemExit, 1
sslctx.load_cert_chain(keyfile)
#sslctx.load_verify_locations('ca.pem')
#sslctx.set_client_CA_list_from_file('ca.pem')
sslctx.set_verify(SSL.verify_none, 15)
#sslctx.set_allow_unknown_ca(1)
sslctx.set_session_id_ctx(self.__name__)
sslctx.set_info_callback(self.handle_sslinfo)
#sslctx.set_tmp_dh('dh1024.pem')
self.logRequests = 0
# setup unhandled request syslog handling
SimpleXMLRPCServer.SimpleXMLRPCDispatcher.__init__(self)
SSL.SSLServer.__init__(self, location, CobaltXMLRPCRequestHandler, sslctx)
self.port = self.socket.socket.getsockname()[1]
self.logger.info("Bound to port %s" % self.port)
self.funcs.update({'HandleEvents':self.HandleEvents,
'system.listMethods':self.system_listMethods})
def HandleEvents(self, address, event_list):
'''Default event handler'''
return True
def handle_sslinfo(self, where, ret, ssl_ptr):
'''This is where we need to handle all ssl negotiation issues'''
pass
def _cobalt_marshalled_dispatch(self, data, address):
"""Decode and dispatch XMLRPC requests. Overloaded to pass through
client address information
"""
rawparams, method = xmlrpclib.loads(data)
if len(rawparams) < 2:
self.logger.error("No authentication included with request from %s" % address[0])
return xmlrpclib.dumps(xmlrpclib.Fault(2, "No Authentication Info"))
user = rawparams[0]
password = rawparams[1]
params = rawparams[2:]
# check authentication
if not self._authenticate_connection(method, user, password, address):
self.logger.error("Authentication failure from %s" % address[0])
return xmlrpclib.dumps(xmlrpclib.Fault(3, "Authentication Failure"))
# generate response
try:
# all handlers must take address as the first argument
response = self._dispatch(method, (address, ) + params)
# wrap response in a singleton tuple
response = (response,)
response = xmlrpclib.dumps(response, methodresponse=1)
except xmlrpclib.Fault, fault:
response = xmlrpclib.dumps(fault)
except TypeError, terror:
self.logger.error("Client %s called function %s with wrong argument count" %
(address[0], method))
response = xmlrpclib.dumps(xmlrpclib.Fault(4, terror.args[0]))
except:
self.logger.error("Unexpected failure in handler", exc_info=1)
# report exception back to server
response = xmlrpclib.dumps(xmlrpclib.Fault(1, "handler failure"))
return response
def _authenticate_connection(self, method, user, password, address):
'''Authenticate new connection'''
(user, address, method)
return password == self.password
def save_state(self):
'''Save fields defined in __statefields__ in /var/spool/cobalt/__implementation__'''
if self.__statefields__:
savedata = tuple([getattr(self, field) for field in self.__statefields__])
try:
statefile = open("/var/spool/cobalt/%s" % self.__implementation__, 'w')
# need to flock here
statefile.write(cPickle.dumps(savedata))
except:
self.logger.info("Statefile save failed; data persistence disabled")
self.__statefields__ = []
def load_state(self):
'''Load fields defined in __statefields__ from /var/spool/cobalt/__implementation__'''
if self.__statefields__:
try:
loaddata = cPickle.loads(open("/var/spool/cobalt/%s" % self.__implementation__).read())
except:
self.logger.info("Statefile load failed")
return
for field in self.__statefields__:
setattr(self, field, loaddata[self.__statefields__.index(field)])
def system_listMethods(self, address):
"""get rid of the address argument and call the underlying dispatcher method"""
return SimpleXMLRPCServer.SimpleXMLRPCDispatcher.system_listMethods(self)
|
