321
313
self.checker_command = config[u"checker"]
322
314
self.current_checker_command = None
323
315
self.last_connect = None
324
self._approved = None
325
self.approved_by_default = config.get(u"approved_by_default",
327
self.approvals_pending = 0
328
self.approved_delay = string_to_delta(
329
config[u"approved_delay"])
330
self.approved_duration = string_to_delta(
331
config[u"approved_duration"])
332
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
334
def send_changedstate(self):
335
self.changedstate.acquire()
336
self.changedstate.notify_all()
337
self.changedstate.release()
339
317
def enable(self):
340
318
"""Start this client's checker and timeout hooks"""
341
319
if getattr(self, u"enabled", False):
342
320
# Already enabled
344
self.send_changedstate()
345
322
self.last_enabled = datetime.datetime.utcnow()
346
323
# Schedule a new checker to be started an 'interval' from now,
347
324
# and every interval from then on.
500
475
if error.errno != errno.ESRCH: # No such process
502
477
self.checker = None
479
def still_valid(self):
480
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
483
now = datetime.datetime.utcnow()
484
if self.last_checked_ok is None:
485
return now < (self.created + self.timeout)
487
return now < (self.last_checked_ok + self.timeout)
504
490
def dbus_service_property(dbus_interface, signature=u"v",
505
491
access=u"readwrite", byte_arrays=False):
513
499
dbus.service.method, except there is only "signature", since the
514
500
type from Get() and the type sent to Set() is the same.
516
# Encoding deeply encoded byte arrays is not supported yet by the
517
# "Set" method, so we fail early here:
518
if byte_arrays and signature != u"ay":
519
raise ValueError(u"Byte arrays not supported for non-'ay'"
520
u" signature %r" % signature)
521
502
def decorator(func):
522
503
func._dbus_is_property = True
523
504
func._dbus_interface = dbus_interface
710
686
+ self.name.replace(u".", u"_")))
711
687
DBusObjectWithProperties.__init__(self, self.bus,
712
688
self.dbus_object_path)
714
def _get_approvals_pending(self):
715
return self._approvals_pending
716
def _set_approvals_pending(self, value):
717
old_value = self._approvals_pending
718
self._approvals_pending = value
720
if (hasattr(self, "dbus_object_path")
721
and bval is not bool(old_value)):
722
dbus_bool = dbus.Boolean(bval, variant_level=1)
723
self.PropertyChanged(dbus.String(u"approved_pending"),
726
approvals_pending = property(_get_approvals_pending,
727
_set_approvals_pending)
728
del _get_approvals_pending, _set_approvals_pending
731
691
def _datetime_to_dbus(dt, variant_level=0):
820
780
self.PropertyChanged(dbus.String(u"checker_running"),
821
781
dbus.Boolean(False, variant_level=1))
824
def _reset_approved(self):
825
self._approved = None
828
def approve(self, value=True):
829
self.send_changedstate()
830
self._approved = value
831
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
832
self._reset_approved)
835
## D-Bus methods, signals & properties
784
## D-Bus methods & signals
836
785
_interface = u"se.bsnet.fukt.Mandos.Client"
788
@dbus.service.method(_interface)
790
return self.checked_ok()
840
792
# CheckerCompleted - signal
841
793
@dbus.service.signal(_interface, signature=u"nxs")
858
810
# GotSecret - signal
859
811
@dbus.service.signal(_interface)
860
812
def GotSecret(self):
862
Is sent after a successful transfer of secret from the Mandos
863
server to mandos-client
867
816
# Rejected - signal
868
@dbus.service.signal(_interface, signature=u"s")
869
def Rejected(self, reason):
873
# NeedApproval - signal
874
@dbus.service.signal(_interface, signature=u"db")
875
def NeedApproval(self, timeout, default):
882
@dbus.service.method(_interface, in_signature=u"b")
883
def Approve(self, value):
887
@dbus.service.method(_interface)
889
return self.checked_ok()
817
@dbus.service.signal(_interface)
891
822
# Enable - method
892
823
@dbus.service.method(_interface)
911
842
def StopChecker(self):
912
843
self.stop_checker()
916
# approved_pending - property
917
@dbus_service_property(_interface, signature=u"b", access=u"read")
918
def approved_pending_dbus_property(self):
919
return dbus.Boolean(bool(self.approvals_pending))
921
# approved_by_default - property
922
@dbus_service_property(_interface, signature=u"b",
924
def approved_by_default_dbus_property(self):
925
return dbus.Boolean(self.approved_by_default)
927
# approved_delay - property
928
@dbus_service_property(_interface, signature=u"t",
930
def approved_delay_dbus_property(self):
931
return dbus.UInt64(self.approved_delay_milliseconds())
933
# approved_duration - property
934
@dbus_service_property(_interface, signature=u"t",
936
def approved_duration_dbus_property(self):
937
return dbus.UInt64(self._timedelta_to_milliseconds(
938
self.approved_duration))
940
845
# name - property
941
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
942
847
def name_dbus_property(self):
1079
class ProxyClient(object):
1080
def __init__(self, child_pipe, fpr, address):
1081
self._pipe = child_pipe
1082
self._pipe.send(('init', fpr, address))
1083
if not self._pipe.recv():
1086
def __getattribute__(self, name):
1087
if(name == '_pipe'):
1088
return super(ProxyClient, self).__getattribute__(name)
1089
self._pipe.send(('getattr', name))
1090
data = self._pipe.recv()
1091
if data[0] == 'data':
1093
if data[0] == 'function':
1094
def func(*args, **kwargs):
1095
self._pipe.send(('funcall', name, args, kwargs))
1096
return self._pipe.recv()[1]
1099
def __setattr__(self, name, value):
1100
if(name == '_pipe'):
1101
return super(ProxyClient, self).__setattr__(name, value)
1102
self._pipe.send(('setattr', name, value))
1105
984
class ClientHandler(socketserver.BaseRequestHandler, object):
1106
985
"""A class to handle client connections.
1109
988
Note: This will run in its own forked process."""
1111
990
def handle(self):
1112
with contextlib.closing(self.server.child_pipe) as child_pipe:
1113
logger.info(u"TCP connection from: %s",
1114
unicode(self.client_address))
1115
logger.debug(u"Pipe FD: %d",
1116
self.server.child_pipe.fileno())
991
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1118
996
session = (gnutls.connection
1119
997
.ClientSession(self.request,
1120
998
gnutls.connection
1121
999
.X509Credentials()))
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1004
if int(line.strip().split()[0]) > 1:
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1123
1010
# Note: gnutls.connection.X509Credentials is really a
1124
1011
# generic GnuTLS certificate credentials object so long as
1125
1012
# no X.509 keys are added to it. Therefore, we can use it
1126
1013
# here despite using OpenPGP certificates.
1128
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1129
1016
# u"+AES-256-CBC", u"+SHA1",
1130
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1136
1023
(gnutls.library.functions
1137
1024
.gnutls_priority_set_direct(session._c_object,
1138
1025
priority, None))
1140
# Start communication using the Mandos protocol
1141
# Get protocol number
1142
line = self.request.makefile().readline()
1143
logger.debug(u"Protocol version: %r", line)
1145
if int(line.strip().split()[0]) > 1:
1147
except (ValueError, IndexError, RuntimeError), error:
1148
logger.error(u"Unknown protocol version: %s", error)
1151
# Start GnuTLS connection
1153
1028
session.handshake()
1154
1029
except gnutls.errors.GNUTLSError, error:
1157
1032
# established. Just abandon the request.
1159
1034
logger.debug(u"Handshake succeeded")
1161
approval_required = False
1164
fpr = self.fingerprint(self.peer_certificate
1166
except (TypeError, gnutls.errors.GNUTLSError), error:
1167
logger.warning(u"Bad certificate: %s", error)
1169
logger.debug(u"Fingerprint: %s", fpr)
1172
client = ProxyClient(child_pipe, fpr,
1173
self.client_address)
1177
if client.approved_delay:
1178
delay = client.approved_delay
1179
client.approvals_pending += 1
1180
approval_required = True
1183
if not client.enabled:
1184
logger.warning(u"Client %s is disabled",
1186
if self.server.use_dbus:
1188
client.Rejected("Disabled")
1191
if client._approved or not client.approved_delay:
1192
#We are approved or approval is disabled
1194
elif client._approved is None:
1195
logger.info(u"Client %s need approval",
1197
if self.server.use_dbus:
1199
client.NeedApproval(
1200
client.approved_delay_milliseconds(),
1201
client.approved_by_default)
1203
logger.warning(u"Client %s was not approved",
1205
if self.server.use_dbus:
1207
client.Rejected("Disapproved")
1210
#wait until timeout or approved
1211
#x = float(client._timedelta_to_milliseconds(delay))
1212
time = datetime.datetime.now()
1213
client.changedstate.acquire()
1214
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1215
client.changedstate.release()
1216
time2 = datetime.datetime.now()
1217
if (time2 - time) >= delay:
1218
if not client.approved_by_default:
1219
logger.warning("Client %s timed out while"
1220
" waiting for approval",
1222
if self.server.use_dbus:
1224
client.Rejected("Time out")
1229
delay -= time2 - time
1232
while sent_size < len(client.secret):
1234
sent = session.send(client.secret[sent_size:])
1235
except (gnutls.errors.GNUTLSError), error:
1236
logger.warning("gnutls send failed")
1238
logger.debug(u"Sent: %d, remaining: %d",
1239
sent, len(client.secret)
1240
- (sent_size + sent))
1243
logger.info(u"Sending secret to %s", client.name)
1244
# bump the timeout as if seen
1246
if self.server.use_dbus:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1041
logger.debug(u"Fingerprint: %s", fpr)
1251
if approval_required:
1252
client.approvals_pending -= 1
1255
except (gnutls.errors.GNUTLSError), error:
1256
logger.warning("gnutls bye failed")
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1059
ipc.write(u"SENDING %s\n" % client.name)
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1259
1070
def peer_certificate(session):
1322
class MultiprocessingMixIn(object):
1323
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1324
def sub_process_main(self, request, address):
1326
self.finish_request(request, address)
1328
self.handle_error(request, address)
1329
self.close_request(request)
1331
def process_request(self, request, address):
1332
"""Start a new process to process the request."""
1333
multiprocessing.Process(target = self.sub_process_main,
1334
args = (request, address)).start()
1336
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1337
""" adds a pipe to the MixIn """
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1338
1135
def process_request(self, request, client_address):
1339
1136
"""Overrides and wraps the original process_request().
1341
1138
This function creates a new pipe in self.pipe
1343
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1345
super(MultiprocessingMixInWithPipe,
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1346
1142
self).process_request(request, client_address)
1347
self.child_pipe.close()
1348
self.add_pipe(parent_pipe)
1350
def add_pipe(self, parent_pipe):
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
1351
1146
"""Dummy function; override as necessary"""
1354
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1355
1151
socketserver.TCPServer, object):
1356
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1442
1238
return socketserver.TCPServer.server_activate(self)
1443
1239
def enable(self):
1444
1240
self.enabled = True
1445
def add_pipe(self, parent_pipe):
1241
def add_pipe(self, pipe):
1446
1242
# Call "handle_ipc" for both data and EOF events
1447
gobject.io_add_watch(parent_pipe.fileno(),
1448
gobject.IO_IN | gobject.IO_HUP,
1449
functools.partial(self.handle_ipc,
1450
parent_pipe = parent_pipe))
1452
def handle_ipc(self, source, condition, parent_pipe=None,
1453
client_object=None):
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1245
def handle_ipc(self, source, condition, file_objects={}):
1454
1246
condition_names = {
1455
1247
gobject.IO_IN: u"IN", # There is data to read.
1456
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1467
1259
if cond & condition)
1468
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1469
1261
conditions_string)
1471
# error or the other end of multiprocessing.Pipe has closed
1472
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1475
# Read a request from the child
1476
request = parent_pipe.recv()
1477
logger.debug(u"IPC request: %s", repr(request))
1478
command = request[0]
1480
if command == 'init':
1482
address = request[2]
1484
for c in self.clients:
1485
if c.fingerprint == fpr:
1489
logger.warning(u"Client not found for fingerprint: %s, ad"
1490
u"dress: %s", fpr, address)
1493
mandos_dbus_service.ClientNotFound(fpr, address)
1494
parent_pipe.send(False)
1497
gobject.io_add_watch(parent_pipe.fileno(),
1498
gobject.IO_IN | gobject.IO_HUP,
1499
functools.partial(self.handle_ipc,
1500
parent_pipe = parent_pipe,
1501
client_object = client))
1502
parent_pipe.send(True)
1503
# remove the old hook in favor of the new above hook on same fileno
1505
if command == 'funcall':
1506
funcname = request[1]
1510
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1512
if command == 'getattr':
1513
attrname = request[1]
1514
if callable(client_object.__getattribute__(attrname)):
1515
parent_pipe.send(('function',))
1517
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1519
if command == 'setattr':
1520
attrname = request[1]
1522
setattr(client_object, attrname, value)
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1274
# Stop calling this function
1277
logger.debug(u"IPC command: %r", cmdline)
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1282
if cmd == u"NOTFOUND":
1283
fpr, address = args.split(None, 1)
1284
logger.warning(u"Client not found for fingerprint: %s, ad"
1285
u"dress: %s", fpr, address)
1288
mandos_dbus_service.ClientNotFound(fpr, address)
1289
elif cmd == u"INVALID":
1290
for client in self.clients:
1291
if client.name == args:
1292
logger.warning(u"Client %s is invalid", args)
1298
logger.error(u"Unknown client %s is invalid", args)
1299
elif cmd == u"SENDING":
1300
for client in self.clients:
1301
if client.name == args:
1302
logger.info(u"Sending secret to %s", client.name)
1309
logger.error(u"Sending secret to unknown client %s",
1312
logger.error(u"Unknown IPC command: %r", cmdline)
1314
# Keep calling this function
1629
1420
parser.add_option("--debug", action=u"store_true",
1630
1421
help=u"Debug mode; run in foreground and log to"
1632
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1633
help=u"Debug level for stdout output")
1634
1423
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1635
1424
u" priority string (see GnuTLS documentation)")
1636
1425
parser.add_option("--servicename", type=u"string",
1684
1472
# options, if set.
1685
1473
for option in (u"interface", u"address", u"port", u"debug",
1686
1474
u"priority", u"servicename", u"configdir",
1687
u"use_dbus", u"use_ipv6", u"debuglevel"):
1475
u"use_dbus", u"use_ipv6"):
1688
1476
value = getattr(options, option)
1689
1477
if value is not None:
1690
1478
server_settings[option] = value
1814
1583
if server_settings["interface"]:
1815
1584
service.interface = (if_nametoindex
1816
1585
(str(server_settings[u"interface"])))
1819
# Close all input and output, do double fork, etc.
1822
global multiprocessing_manager
1823
multiprocessing_manager = multiprocessing.Manager()
1825
1587
client_class = Client
1827
1589
client_class = functools.partial(ClientDBus, bus = bus)
1828
def client_config_items(config, section):
1829
special_settings = {
1830
"approved_by_default":
1831
lambda: config.getboolean(section,
1832
"approved_by_default"),
1834
for name, value in config.items(section):
1836
yield (name, special_settings[name]())
1840
1590
tcp_server.clients.update(set(
1841
1591
client_class(name = section,
1842
config= dict(client_config_items(
1843
client_config, section)))
1592
config= dict(client_config.items(section)))
1844
1593
for section in client_config.sections()))
1845
1594
if not tcp_server.clients:
1846
1595
logger.warning(u"No clients defined")
1598
# Redirect stdin so all checkers get /dev/null
1599
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1600
os.dup2(null, sys.stdin.fileno())
1604
# No console logging
1605
logger.removeHandler(console)
1606
# Close all input and output, do double fork, etc.
1610
with closing(pidfile):
1850
1611
pid = os.getpid()
1851
1612
pidfile.write(str(pid) + "\n")