129
106
max_renames: integer; maximum number of renames
130
107
rename_count: integer; counter so we only rename after collisions
131
108
a sensible number of times
132
group: D-Bus Entry Group
134
bus: dbus.SystemBus()
136
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
140
113
self.interface = interface
142
self.type = servicetype
144
self.TXT = TXT if TXT is not None else []
145
121
self.domain = domain
147
123
self.rename_count = 0
148
124
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
153
125
def rename(self):
154
126
"""Derived from the Avahi example code"""
155
127
if self.rename_count >= self.max_renames:
156
128
logger.critical(u"No suitable Zeroconf service name found"
157
129
u" after %i retries, exiting.",
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
161
133
logger.info(u"Changing Zeroconf service name to %r ...",
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
174
140
self.rename_count += 1
175
141
def remove(self):
176
142
"""Derived from the Avahi example code"""
177
if self.group is not None:
143
if group is not None:
180
146
"""Derived from the Avahi example code"""
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
188
.entry_group_state_changed)
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
189
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
190
self.name, self.type)
191
self.group.AddService(
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
200
def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
212
raise AvahiGroupError(u"State changed: %s"
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
225
elif state == avahi.SERVER_RUNNING:
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
156
service.name, service.type)
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
239
172
class Client(object):
240
173
"""A representation of a client host served by this server.
243
name: string; from the config file, used in log messages and
175
name: string; from the config file, used in log messages
245
176
fingerprint: string (40 or 32 hexadecimal digits); used to
246
177
uniquely identify the client
247
secret: bytestring; sent verbatim (over TLS) to client
248
host: string; available for use by the checker command
249
created: datetime.datetime(); (UTC) object creation
250
last_enabled: datetime.datetime(); (UTC)
252
last_checked_ok: datetime.datetime(); (UTC) or None
253
timeout: datetime.timedelta(); How long from last_checked_ok
254
until this client is disabled
255
interval: datetime.timedelta(); How often to start a new checker
256
disable_hook: If set, called by disable() as disable_hook(self)
257
checker: subprocess.Popen(); a running checker process used
258
to see if the client lives.
259
'None' if no process is running.
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
260
189
checker_initiator_tag: a gobject event source tag, or None
261
disable_initiator_tag: - '' -
190
stop_initiator_tag: - '' -
262
191
checker_callback_tag: - '' -
263
192
checker_command: string; External command which is run to check if
264
193
client lives. %() expansions are done at
265
194
runtime with vars(self) as dict, so that for
266
195
instance %(name)s can be used in the command.
267
current_checker_command: string; current running checker_command
268
approved_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approved_duration: datetime.timedelta(); Duration of one approval
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
280
def timeout_milliseconds(self):
281
"Return the 'timeout' attribute in milliseconds"
282
return self._timedelta_to_milliseconds(self.timeout)
284
def interval_milliseconds(self):
285
"Return the 'interval' attribute in milliseconds"
286
return self._timedelta_to_milliseconds(self.interval)
288
def approved_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approved_delay)
291
def __init__(self, name = None, disable_hook=None, config=None):
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
210
timeout = property(lambda self: self._timeout,
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
220
+ (self.interval.microseconds
222
interval = property(lambda self: self._interval,
225
def __init__(self, name = None, stop_hook=None, config={}):
292
226
"""Note: the 'checker' key in 'config' sets the
293
227
'checker_command' attribute and *not* the 'checker'
298
230
logger.debug(u"Creating client %r", self.name)
299
231
# Uppercase and remove spaces from fingerprint for later
300
232
# comparison purposes with return value from the fingerprint()
302
self.fingerprint = (config[u"fingerprint"].upper()
234
self.fingerprint = config["fingerprint"].upper()\
304
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
311
self.secret = secfile.read()
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
313
244
raise TypeError(u"No secret or secfile for client %s"
315
self.host = config.get(u"host", u"")
316
self.created = datetime.datetime.utcnow()
318
self.last_enabled = None
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
319
248
self.last_checked_ok = None
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
322
self.disable_hook = disable_hook
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
323
252
self.checker = None
324
253
self.checker_initiator_tag = None
325
self.disable_initiator_tag = None
254
self.stop_initiator_tag = None
326
255
self.checker_callback_tag = None
327
self.checker_command = config[u"checker"]
328
self.current_checker_command = None
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
333
self.approvals_pending = 0
334
self.approved_delay = string_to_delta(
335
config[u"approved_delay"])
336
self.approved_duration = string_to_delta(
337
config[u"approved_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
340
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
256
self.check_command = config["checker"]
346
258
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
350
self.send_changedstate()
351
self.last_enabled = datetime.datetime.utcnow()
352
259
# Schedule a new checker to be started an 'interval' from now,
353
260
# and every interval from then on.
354
self.checker_initiator_tag = (gobject.timeout_add
355
(self.interval_milliseconds(),
357
# Schedule a disable() when 'timeout' has passed
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
362
264
# Also start a new checker *right now*.
363
265
self.start_checker()
365
def disable(self, quiet=True):
366
"""Disable this client."""
367
if not getattr(self, "enabled", False):
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
370
self.send_changedstate()
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
374
gobject.source_remove(self.disable_initiator_tag)
375
self.disable_initiator_tag = None
376
if getattr(self, u"checker_initiator_tag", False):
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
377
284
gobject.source_remove(self.checker_initiator_tag)
378
285
self.checker_initiator_tag = None
379
286
self.stop_checker()
380
if self.disable_hook:
381
self.disable_hook(self)
383
289
# Do not run this again if called by a gobject.timeout_add
386
291
def __del__(self):
387
self.disable_hook = None
390
def checker_callback(self, pid, condition, command):
292
self.stop_hook = None
294
def checker_callback(self, pid, condition):
391
295
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
392
297
self.checker_callback_tag = None
393
298
self.checker = None
394
if os.WIFEXITED(condition):
395
exitstatus = os.WEXITSTATUS(condition)
397
logger.info(u"Checker for %(name)s succeeded",
401
logger.info(u"Checker for %(name)s failed",
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
308
elif not os.WIFEXITED(condition):
404
309
logger.warning(u"Checker for %(name)s crashed?",
407
def checked_ok(self):
408
"""Bump up the timeout for this client.
410
This should only be called when the client has been seen,
413
self.last_checked_ok = datetime.datetime.utcnow()
414
gobject.source_remove(self.disable_initiator_tag)
415
self.disable_initiator_tag = (gobject.timeout_add
416
(self.timeout_milliseconds(),
312
logger.info(u"Checker for %(name)s failed",
419
314
def start_checker(self):
420
315
"""Start a new checker subprocess if one is not running.
422
316
If a checker already exists, leave it running and do
424
318
# The reason for not killing a running checker is that if we
472
347
# always replaced by /dev/null.)
473
348
self.checker = subprocess.Popen(command,
475
shell=True, cwd=u"/")
476
self.checker_callback_tag = (gobject.child_watch_add
478
self.checker_callback,
480
# The checker may have completed before the gobject
481
# watch was added. Check for this.
482
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
484
gobject.source_remove(self.checker_callback_tag)
485
self.checker_callback(pid, status, command)
351
self.checker_callback_tag = gobject.child_watch_add\
353
self.checker_callback)
486
354
except OSError, error:
487
355
logger.error(u"Failed to start subprocess: %s",
489
357
# Re-run this periodically if run by gobject.timeout_add
492
359
def stop_checker(self):
493
360
"""Force the checker process, if any, to stop."""
494
361
if self.checker_callback_tag:
495
362
gobject.source_remove(self.checker_callback_tag)
496
363
self.checker_callback_tag = None
497
if getattr(self, u"checker", None) is None:
364
if getattr(self, "checker", None) is None:
499
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
501
368
os.kill(self.checker.pid, signal.SIGTERM)
503
370
#if self.checker.poll() is None:
504
371
# os.kill(self.checker.pid, signal.SIGKILL)
505
372
except OSError, error:
506
373
if error.errno != errno.ESRCH: # No such process
508
375
self.checker = None
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
512
"""Decorators for marking methods of a DBusObjectWithProperties to
513
become properties on the D-Bus.
515
The decorated method will be called with no arguments by "Get"
516
and with one argument by "Set".
518
The parameters, where they are supported, are the same as
519
dbus.service.method, except there is only "signature", since the
520
type from Get() and the type sent to Set() is the same.
522
# Encoding deeply encoded byte arrays is not supported yet by the
523
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
528
func._dbus_is_property = True
529
func._dbus_interface = dbus_interface
530
func._dbus_signature = signature
531
func._dbus_access = access
532
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
534
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
540
class DBusPropertyException(dbus.exceptions.DBusException):
541
"""A base class for D-Bus property-related exceptions
543
def __unicode__(self):
544
return unicode(str(self))
547
class DBusPropertyAccessException(DBusPropertyException):
548
"""A property's access permissions disallows an operation.
553
class DBusPropertyNotFound(DBusPropertyException):
554
"""An attempt was made to access a non-existing property.
559
class DBusObjectWithProperties(dbus.service.Object):
560
"""A D-Bus object with properties.
562
Classes inheriting from this can use the dbus_service_property
563
decorator to expose methods as D-Bus properties. It exposes the
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
574
return ((prop._dbus_name, prop)
576
inspect.getmembers(self, self._is_dbus_property))
578
def _get_dbus_property(self, interface_name, property_name):
579
"""Returns a bound method if one exists which is a D-Bus
580
property with the specified name and interface.
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
599
def Get(self, interface_name, property_name):
600
"""Standard D-Bus property Get() method, see D-Bus standard.
602
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
604
raise DBusPropertyAccessException(property_name)
606
if not hasattr(value, u"variant_level"):
608
return type(value)(value, variant_level=value.variant_level+1)
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
def Set(self, interface_name, property_name, value):
612
"""Standard D-Bus property Set() method, see D-Bus standard.
614
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
616
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
618
# The byte_arrays option is not supported yet on
619
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
622
value = dbus.ByteArray(''.join(unichr(byte)
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
628
def GetAll(self, interface_name):
629
"""Standard D-Bus property GetAll() method, see D-Bus
632
Note: Will not include properties with access="write".
635
for name, prop in self._get_all_dbus_properties():
637
and interface_name != prop._dbus_interface):
638
# Interface non-empty but did not match
640
# Ignore write-only properties
641
if prop._dbus_access == u"write":
644
if not hasattr(value, u"variant_level"):
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
653
path_keyword='object_path',
654
connection_keyword='connection')
655
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
661
document = xml.dom.minidom.parseString(xmlstring)
662
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
668
for if_tag in document.getElementsByTagName(u"interface"):
669
for tag in (make_tag(document, name, prop)
671
in self._get_all_dbus_properties()
672
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
674
if_tag.appendChild(tag)
675
# Add the names to the return values for the
676
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
699
class ClientDBus(Client, DBusObjectWithProperties):
700
"""A Client class using D-Bus
703
dbus_object_path: dbus.ObjectPath
704
bus: dbus.SystemBus()
706
# dbus.service.Object doesn't use super(), so we can't either.
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
711
Client.__init__(self, *args, **kwargs)
712
# Only now, when this client is initialized, can it show up on
714
self.dbus_object_path = (dbus.ObjectPath
716
+ self.name.replace(u".", u"_")))
717
DBusObjectWithProperties.__init__(self, self.bus,
718
self.dbus_object_path)
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"approved_pending"),
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
743
oldstate = getattr(self, u"enabled", False)
744
r = Client.enable(self)
745
if oldstate != self.enabled:
747
self.PropertyChanged(dbus.String(u"enabled"),
748
dbus.Boolean(True, variant_level=1))
749
self.PropertyChanged(
750
dbus.String(u"last_enabled"),
751
self._datetime_to_dbus(self.last_enabled,
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
760
self.PropertyChanged(dbus.String(u"enabled"),
761
dbus.Boolean(False, variant_level=1))
764
def __del__(self, *args, **kwargs):
766
self.remove_from_connection()
769
if hasattr(DBusObjectWithProperties, u"__del__"):
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
771
Client.__del__(self, *args, **kwargs)
773
def checker_callback(self, pid, condition, command,
775
self.checker_callback_tag = None
778
self.PropertyChanged(dbus.String(u"checker_running"),
779
dbus.Boolean(False, variant_level=1))
780
if os.WIFEXITED(condition):
781
exitstatus = os.WEXITSTATUS(condition)
783
self.CheckerCompleted(dbus.Int16(exitstatus),
784
dbus.Int64(condition),
785
dbus.String(command))
788
self.CheckerCompleted(dbus.Int16(-1),
789
dbus.Int64(condition),
790
dbus.String(command))
792
return Client.checker_callback(self, pid, condition, command,
795
def checked_ok(self, *args, **kwargs):
796
r = Client.checked_ok(self, *args, **kwargs)
798
self.PropertyChanged(
799
dbus.String(u"last_checked_ok"),
800
(self._datetime_to_dbus(self.last_checked_ok,
804
def start_checker(self, *args, **kwargs):
805
old_checker = self.checker
806
if self.checker is not None:
807
old_checker_pid = self.checker.pid
809
old_checker_pid = None
810
r = Client.start_checker(self, *args, **kwargs)
811
# Only if new checker process was started
812
if (self.checker is not None
813
and old_checker_pid != self.checker.pid):
815
self.CheckerStarted(self.current_checker_command)
816
self.PropertyChanged(
817
dbus.String(u"checker_running"),
818
dbus.Boolean(True, variant_level=1))
821
def stop_checker(self, *args, **kwargs):
822
old_checker = getattr(self, u"checker", None)
823
r = Client.stop_checker(self, *args, **kwargs)
824
if (old_checker is not None
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"checker_running"),
827
dbus.Boolean(False, variant_level=1))
830
def _reset_approved(self):
831
self._approved = None
834
def approve(self, value=True):
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
838
self._reset_approved)
841
## D-Bus methods, signals & properties
842
_interface = u"se.bsnet.fukt.Mandos.Client"
846
# CheckerCompleted - signal
847
@dbus.service.signal(_interface, signature=u"nxs")
848
def CheckerCompleted(self, exitcode, waitstatus, command):
852
# CheckerStarted - signal
853
@dbus.service.signal(_interface, signature=u"s")
854
def CheckerStarted(self, command):
858
# PropertyChanged - signal
859
@dbus.service.signal(_interface, signature=u"sv")
860
def PropertyChanged(self, property, value):
865
@dbus.service.signal(_interface)
868
Is sent after a successful transfer of secret from the Mandos
869
server to mandos-client
874
@dbus.service.signal(_interface, signature=u"s")
875
def Rejected(self, reason):
879
# NeedApproval - signal
880
@dbus.service.signal(_interface, signature=u"db")
881
def NeedApproval(self, timeout, default):
888
@dbus.service.method(_interface, in_signature=u"b")
889
def Approve(self, value):
893
@dbus.service.method(_interface)
895
return self.checked_ok()
898
@dbus.service.method(_interface)
903
# StartChecker - method
904
@dbus.service.method(_interface)
905
def StartChecker(self):
910
@dbus.service.method(_interface)
915
# StopChecker - method
916
@dbus.service.method(_interface)
917
def StopChecker(self):
922
# approved_pending - property
923
@dbus_service_property(_interface, signature=u"b", access=u"read")
924
def approved_pending_dbus_property(self):
925
return dbus.Boolean(bool(self.approvals_pending))
927
# approved_by_default - property
928
@dbus_service_property(_interface, signature=u"b",
930
def approved_by_default_dbus_property(self):
931
return dbus.Boolean(self.approved_by_default)
933
# approved_delay - property
934
@dbus_service_property(_interface, signature=u"t",
936
def approved_delay_dbus_property(self):
937
return dbus.UInt64(self.approved_delay_milliseconds())
939
# approved_duration - property
940
@dbus_service_property(_interface, signature=u"t",
942
def approved_duration_dbus_property(self):
943
return dbus.UInt64(self._timedelta_to_milliseconds(
944
self.approved_duration))
947
@dbus_service_property(_interface, signature=u"s", access=u"read")
948
def name_dbus_property(self):
949
return dbus.String(self.name)
951
# fingerprint - property
952
@dbus_service_property(_interface, signature=u"s", access=u"read")
953
def fingerprint_dbus_property(self):
954
return dbus.String(self.fingerprint)
957
@dbus_service_property(_interface, signature=u"s",
959
def host_dbus_property(self, value=None):
960
if value is None: # get
961
return dbus.String(self.host)
964
self.PropertyChanged(dbus.String(u"host"),
965
dbus.String(value, variant_level=1))
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def created_dbus_property(self):
970
return dbus.String(self._datetime_to_dbus(self.created))
972
# last_enabled - property
973
@dbus_service_property(_interface, signature=u"s", access=u"read")
974
def last_enabled_dbus_property(self):
975
if self.last_enabled is None:
976
return dbus.String(u"")
977
return dbus.String(self._datetime_to_dbus(self.last_enabled))
980
@dbus_service_property(_interface, signature=u"b",
982
def enabled_dbus_property(self, value=None):
983
if value is None: # get
984
return dbus.Boolean(self.enabled)
990
# last_checked_ok - property
991
@dbus_service_property(_interface, signature=u"s",
993
def last_checked_ok_dbus_property(self, value=None):
994
if value is not None:
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
997
379
if self.last_checked_ok is None:
998
return dbus.String(u"")
999
return dbus.String(self._datetime_to_dbus(self
1002
# timeout - property
1003
@dbus_service_property(_interface, signature=u"t",
1004
access=u"readwrite")
1005
def timeout_dbus_property(self, value=None):
1006
if value is None: # get
1007
return dbus.UInt64(self.timeout_milliseconds())
1008
self.timeout = datetime.timedelta(0, 0, 0, value)
1010
self.PropertyChanged(dbus.String(u"timeout"),
1011
dbus.UInt64(value, variant_level=1))
1012
if getattr(self, u"disable_initiator_tag", None) is None:
1014
# Reschedule timeout
1015
gobject.source_remove(self.disable_initiator_tag)
1016
self.disable_initiator_tag = None
1017
time_to_die = (self.
1018
_timedelta_to_milliseconds((self
1023
if time_to_die <= 0:
1024
# The timeout has passed
1027
self.disable_initiator_tag = (gobject.timeout_add
1028
(time_to_die, self.disable))
1030
# interval - property
1031
@dbus_service_property(_interface, signature=u"t",
1032
access=u"readwrite")
1033
def interval_dbus_property(self, value=None):
1034
if value is None: # get
1035
return dbus.UInt64(self.interval_milliseconds())
1036
self.interval = datetime.timedelta(0, 0, 0, value)
1038
self.PropertyChanged(dbus.String(u"interval"),
1039
dbus.UInt64(value, variant_level=1))
1040
if getattr(self, u"checker_initiator_tag", None) is None:
1042
# Reschedule checker run
1043
gobject.source_remove(self.checker_initiator_tag)
1044
self.checker_initiator_tag = (gobject.timeout_add
1045
(value, self.start_checker))
1046
self.start_checker() # Start one now, too
1048
# checker - property
1049
@dbus_service_property(_interface, signature=u"s",
1050
access=u"readwrite")
1051
def checker_dbus_property(self, value=None):
1052
if value is None: # get
1053
return dbus.String(self.checker_command)
1054
self.checker_command = value
1056
self.PropertyChanged(dbus.String(u"checker"),
1057
dbus.String(self.checker_command,
1060
# checker_running - property
1061
@dbus_service_property(_interface, signature=u"b",
1062
access=u"readwrite")
1063
def checker_running_dbus_property(self, value=None):
1064
if value is None: # get
1065
return dbus.Boolean(self.checker is not None)
1067
self.start_checker()
1071
# object_path - property
1072
@dbus_service_property(_interface, signature=u"o", access=u"read")
1073
def object_path_dbus_property(self):
1074
return self.dbus_object_path # is already a dbus.ObjectPath
1077
@dbus_service_property(_interface, signature=u"ay",
1078
access=u"write", byte_arrays=True)
1079
def secret_dbus_property(self, value):
1080
self.secret = str(value)
1085
class ProxyClient(object):
1086
def __init__(self, child_pipe, fpr, address):
1087
self._pipe = child_pipe
1088
self._pipe.send(('init', fpr, address))
1089
if not self._pipe.recv():
1092
def __getattribute__(self, name):
1093
if(name == '_pipe'):
1094
return super(ProxyClient, self).__getattribute__(name)
1095
self._pipe.send(('getattr', name))
1096
data = self._pipe.recv()
1097
if data[0] == 'data':
1099
if data[0] == 'function':
1100
def func(*args, **kwargs):
1101
self._pipe.send(('funcall', name, args, kwargs))
1102
return self._pipe.recv()[1]
1105
def __setattr__(self, name, value):
1106
if(name == '_pipe'):
1107
return super(ProxyClient, self).__setattr__(name, value)
1108
self._pipe.send(('setattr', name, value))
1111
class ClientHandler(socketserver.BaseRequestHandler, object):
1112
"""A class to handle client connections.
1114
Instantiated once for each connection to handle it.
380
return now < (self.created + self.timeout)
382
return now < (self.last_checked_ok + self.timeout)
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
399
return ctypes.string_at(cert.data, cert.size)
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
1115
442
Note: This will run in its own forked process."""
1117
444
def handle(self):
1118
with contextlib.closing(self.server.child_pipe) as child_pipe:
1119
logger.info(u"TCP connection from: %s",
1120
unicode(self.client_address))
1121
logger.debug(u"Pipe FD: %d",
1122
self.server.child_pipe.fileno())
1124
session = (gnutls.connection
1125
.ClientSession(self.request,
1127
.X509Credentials()))
1129
# Note: gnutls.connection.X509Credentials is really a
1130
# generic GnuTLS certificate credentials object so long as
1131
# no X.509 keys are added to it. Therefore, we can use it
1132
# here despite using OpenPGP certificates.
1134
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1135
# u"+AES-256-CBC", u"+SHA1",
1136
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1138
# Use a fallback default, since this MUST be set.
1139
priority = self.server.gnutls_priority
1140
if priority is None:
1141
priority = u"NORMAL"
1142
(gnutls.library.functions
1143
.gnutls_priority_set_direct(session._c_object,
1146
# Start communication using the Mandos protocol
1147
# Get protocol number
1148
line = self.request.makefile().readline()
1149
logger.debug(u"Protocol version: %r", line)
1151
if int(line.strip().split()[0]) > 1:
1153
except (ValueError, IndexError, RuntimeError), error:
1154
logger.error(u"Unknown protocol version: %s", error)
1157
# Start GnuTLS connection
1160
except gnutls.errors.GNUTLSError, error:
1161
logger.warning(u"Handshake failed: %s", error)
1162
# Do not run session.bye() here: the session is not
1163
# established. Just abandon the request.
1165
logger.debug(u"Handshake succeeded")
1167
approval_required = False
1170
fpr = self.fingerprint(self.peer_certificate
1172
except (TypeError, gnutls.errors.GNUTLSError), error:
1173
logger.warning(u"Bad certificate: %s", error)
1175
logger.debug(u"Fingerprint: %s", fpr)
1178
client = ProxyClient(child_pipe, fpr,
1179
self.client_address)
1183
if client.approved_delay:
1184
delay = client.approved_delay
1185
client.approvals_pending += 1
1186
approval_required = True
1189
if not client.enabled:
1190
logger.warning(u"Client %s is disabled",
1192
if self.server.use_dbus:
1194
client.Rejected("Disabled")
1197
if client._approved or not client.approved_delay:
1198
#We are approved or approval is disabled
1200
elif client._approved is None:
1201
logger.info(u"Client %s need approval",
1203
if self.server.use_dbus:
1205
client.NeedApproval(
1206
client.approved_delay_milliseconds(),
1207
client.approved_by_default)
1209
logger.warning(u"Client %s was not approved",
1211
if self.server.use_dbus:
1213
client.Rejected("Disapproved")
1216
#wait until timeout or approved
1217
#x = float(client._timedelta_to_milliseconds(delay))
1218
time = datetime.datetime.now()
1219
client.changedstate.acquire()
1220
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1221
client.changedstate.release()
1222
time2 = datetime.datetime.now()
1223
if (time2 - time) >= delay:
1224
if not client.approved_by_default:
1225
logger.warning("Client %s timed out while"
1226
" waiting for approval",
1228
if self.server.use_dbus:
1230
client.Rejected("Time out")
1235
delay -= time2 - time
1238
while sent_size < len(client.secret):
1240
sent = session.send(client.secret[sent_size:])
1241
except (gnutls.errors.GNUTLSError), error:
1242
logger.warning("gnutls send failed")
1244
logger.debug(u"Sent: %d, remaining: %d",
1245
sent, len(client.secret)
1246
- (sent_size + sent))
1249
logger.info(u"Sending secret to %s", client.name)
1250
# bump the timeout as if seen
1252
if self.server.use_dbus:
1257
if approval_required:
1258
client.approvals_pending -= 1
1261
except (gnutls.errors.GNUTLSError), error:
1262
logger.warning("gnutls bye failed")
1265
def peer_certificate(session):
1266
"Return the peer's OpenPGP certificate as a bytestring"
1267
# If not an OpenPGP certificate...
1268
if (gnutls.library.functions
1269
.gnutls_certificate_type_get(session._c_object)
1270
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1271
# ...do the normal thing
1272
return session.peer_certificate
1273
list_size = ctypes.c_uint(1)
1274
cert_list = (gnutls.library.functions
1275
.gnutls_certificate_get_peers
1276
(session._c_object, ctypes.byref(list_size)))
1277
if not bool(cert_list) and list_size.value != 0:
1278
raise gnutls.errors.GNUTLSError(u"error getting peer"
1280
if list_size.value == 0:
1283
return ctypes.string_at(cert.data, cert.size)
1286
def fingerprint(openpgp):
1287
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1288
# New GnuTLS "datum" with the OpenPGP public key
1289
datum = (gnutls.library.types
1290
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1293
ctypes.c_uint(len(openpgp))))
1294
# New empty GnuTLS certificate
1295
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1296
(gnutls.library.functions
1297
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1298
# Import the OpenPGP public key into the certificate
1299
(gnutls.library.functions
1300
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1301
gnutls.library.constants
1302
.GNUTLS_OPENPGP_FMT_RAW))
1303
# Verify the self signature in the key
1304
crtverify = ctypes.c_uint()
1305
(gnutls.library.functions
1306
.gnutls_openpgp_crt_verify_self(crt, 0,
1307
ctypes.byref(crtverify)))
1308
if crtverify.value != 0:
1309
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1310
raise (gnutls.errors.CertificateSecurityError
1312
# New buffer for the fingerprint
1313
buf = ctypes.create_string_buffer(20)
1314
buf_len = ctypes.c_size_t()
1315
# Get the fingerprint from the certificate into the buffer
1316
(gnutls.library.functions
1317
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1318
ctypes.byref(buf_len)))
1319
# Deinit the certificate
1320
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1321
# Convert the buffer to a Python bytestring
1322
fpr = ctypes.string_at(buf, buf_len.value)
1323
# Convert the bytestring to hexadecimal notation
1324
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1328
class MultiprocessingMixIn(object):
1329
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1330
def sub_process_main(self, request, address):
1332
self.finish_request(request, address)
1334
self.handle_error(request, address)
1335
self.close_request(request)
1337
def process_request(self, request, address):
1338
"""Start a new process to process the request."""
1339
multiprocessing.Process(target = self.sub_process_main,
1340
args = (request, address)).start()
1342
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1343
""" adds a pipe to the MixIn """
1344
def process_request(self, request, client_address):
1345
"""Overrides and wraps the original process_request().
1347
This function creates a new pipe in self.pipe
1349
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1351
super(MultiprocessingMixInWithPipe,
1352
self).process_request(request, client_address)
1353
self.child_pipe.close()
1354
self.add_pipe(parent_pipe)
1356
def add_pipe(self, parent_pipe):
1357
"""Dummy function; override as necessary"""
1360
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1361
socketserver.TCPServer, object):
1362
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
453
if int(line.strip().split()[0]) > 1:
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
467
priority = "NORMAL" # Fallback default, since this
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
487
logger.debug(u"Fingerprint: %s", fpr)
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
494
logger.warning(u"Client not found for fingerprint: %s",
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
519
settings: Server settings
520
clients: Set() of Client objects
1365
521
enabled: Boolean; whether this server is activated yet
1366
interface: None or a network interface name (string)
1367
use_ipv6: Boolean; to use IPv6 or not
1369
def __init__(self, server_address, RequestHandlerClass,
1370
interface=None, use_ipv6=True):
1371
self.interface = interface
1373
self.address_family = socket.AF_INET6
1374
socketserver.TCPServer.__init__(self, server_address,
1375
RequestHandlerClass)
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
532
return super(type(self), self).__init__(*args, **kwargs)
1376
533
def server_bind(self):
1377
534
"""This overrides the normal server_bind() function
1378
535
to bind to an interface if one was specified, and also NOT to
1379
536
bind to an address or port if they were not specified."""
1380
if self.interface is not None:
1381
if SO_BINDTODEVICE is None:
1382
logger.error(u"SO_BINDTODEVICE does not exist;"
1383
u" cannot bind to interface %s",
1387
self.socket.setsockopt(socket.SOL_SOCKET,
1391
except socket.error, error:
1392
if error[0] == errno.EPERM:
1393
logger.error(u"No permission to"
1394
u" bind to interface %s",
1396
elif error[0] == errno.ENOPROTOOPT:
1397
logger.error(u"SO_BINDTODEVICE not available;"
1398
u" cannot bind to interface %s",
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
541
self.socket.setsockopt(socket.SOL_SOCKET,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
1402
551
# Only bind(2) the socket if we really need to.
1403
552
if self.server_address[0] or self.server_address[1]:
1404
553
if not self.server_address[0]:
1405
if self.address_family == socket.AF_INET6:
1406
any_address = u"::" # in6addr_any
1408
any_address = socket.INADDR_ANY
1409
self.server_address = (any_address,
555
self.server_address = (in6addr_any,
1410
556
self.server_address[1])
1411
557
elif not self.server_address[1]:
1412
558
self.server_address = (self.server_address[0],
1414
# if self.interface:
560
# if self.settings["interface"]:
1415
561
# self.server_address = (self.server_address[0],
1418
564
# if_nametoindex
1420
return socketserver.TCPServer.server_bind(self)
1423
class MandosServer(IPv6_TCPServer):
1427
clients: set of Client objects
1428
gnutls_priority GnuTLS priority string
1429
use_dbus: Boolean; to emit D-Bus signals or not
1431
Assumes a gobject.MainLoop event loop.
1433
def __init__(self, server_address, RequestHandlerClass,
1434
interface=None, use_ipv6=True, clients=None,
1435
gnutls_priority=None, use_dbus=True):
1436
self.enabled = False
1437
self.clients = clients
1438
if self.clients is None:
1439
self.clients = set()
1440
self.use_dbus = use_dbus
1441
self.gnutls_priority = gnutls_priority
1442
IPv6_TCPServer.__init__(self, server_address,
1443
RequestHandlerClass,
1444
interface = interface,
1445
use_ipv6 = use_ipv6)
567
return super(type(self), self).server_bind()
1446
568
def server_activate(self):
1447
569
if self.enabled:
1448
return socketserver.TCPServer.server_activate(self)
570
return super(type(self), self).server_activate()
1449
571
def enable(self):
1450
572
self.enabled = True
1451
def add_pipe(self, parent_pipe):
1452
# Call "handle_ipc" for both data and EOF events
1453
gobject.io_add_watch(parent_pipe.fileno(),
1454
gobject.IO_IN | gobject.IO_HUP,
1455
functools.partial(self.handle_ipc,
1456
parent_pipe = parent_pipe))
1458
def handle_ipc(self, source, condition, parent_pipe=None,
1459
client_object=None):
1461
gobject.IO_IN: u"IN", # There is data to read.
1462
gobject.IO_OUT: u"OUT", # Data can be written (without
1464
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1465
gobject.IO_ERR: u"ERR", # Error condition.
1466
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1467
# broken, usually for pipes and
1470
conditions_string = ' | '.join(name
1472
condition_names.iteritems()
1473
if cond & condition)
1474
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1477
# error or the other end of multiprocessing.Pipe has closed
1478
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1481
# Read a request from the child
1482
request = parent_pipe.recv()
1483
logger.debug(u"IPC request: %s", repr(request))
1484
command = request[0]
1486
if command == 'init':
1488
address = request[2]
1490
for c in self.clients:
1491
if c.fingerprint == fpr:
1495
logger.warning(u"Client not found for fingerprint: %s, ad"
1496
u"dress: %s", fpr, address)
1499
mandos_dbus_service.ClientNotFound(fpr, address)
1500
parent_pipe.send(False)
1503
gobject.io_add_watch(parent_pipe.fileno(),
1504
gobject.IO_IN | gobject.IO_HUP,
1505
functools.partial(self.handle_ipc,
1506
parent_pipe = parent_pipe,
1507
client_object = client))
1508
parent_pipe.send(True)
1509
# remove the old hook in favor of the new above hook on same fileno
1511
if command == 'funcall':
1512
funcname = request[1]
1516
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1518
if command == 'getattr':
1519
attrname = request[1]
1520
if callable(client_object.__getattribute__(attrname)):
1521
parent_pipe.send(('function',))
1523
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1525
if command == 'setattr':
1526
attrname = request[1]
1528
setattr(client_object, attrname, value)
1533
575
def string_to_delta(interval):
1534
576
"""Parse a string and return a datetime.timedelta
1536
>>> string_to_delta(u'7d')
578
>>> string_to_delta('7d')
1537
579
datetime.timedelta(7)
1538
>>> string_to_delta(u'60s')
580
>>> string_to_delta('60s')
1539
581
datetime.timedelta(0, 60)
1540
>>> string_to_delta(u'60m')
582
>>> string_to_delta('60m')
1541
583
datetime.timedelta(0, 3600)
1542
>>> string_to_delta(u'24h')
584
>>> string_to_delta('24h')
1543
585
datetime.timedelta(1)
1544
586
>>> string_to_delta(u'1w')
1545
587
datetime.timedelta(7)
1546
>>> string_to_delta(u'5m 30s')
588
>>> string_to_delta('5m 30s')
1547
589
datetime.timedelta(0, 330)
1549
591
timevalue = datetime.timedelta(0)
1550
592
for s in interval.split():
1552
suffix = unicode(s[-1])
594
suffix=unicode(s[-1])
1554
596
if suffix == u"d":
1555
597
delta = datetime.timedelta(value)
1556
598
elif suffix == u"s":
1660
716
# Default values for config file for server-global settings
1661
server_defaults = { u"interface": u"",
1666
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1667
u"servicename": u"Mandos",
1668
u"use_dbus": u"True",
1669
u"use_ipv6": u"True",
717
server_defaults = { "interface": "",
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1673
726
# Parse config file for server-global settings
1674
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1675
728
del server_defaults
1676
server_config.read(os.path.join(options.configdir,
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1678
730
# Convert the SafeConfigParser object to a dict
1679
731
server_settings = server_config.defaults()
1680
# Use the appropriate methods on the non-string config options
1681
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1682
server_settings[option] = server_config.getboolean(u"DEFAULT",
1684
if server_settings["port"]:
1685
server_settings["port"] = server_config.getint(u"DEFAULT",
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
1687
735
del server_config
1689
737
# Override the settings from the config file with command line
1690
738
# options, if set.
1691
for option in (u"interface", u"address", u"port", u"debug",
1692
u"priority", u"servicename", u"configdir",
1693
u"use_dbus", u"use_ipv6", u"debuglevel"):
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1694
741
value = getattr(options, option)
1695
742
if value is not None:
1696
743
server_settings[option] = value
1698
# Force all strings to be unicode
1699
for option in server_settings.keys():
1700
if type(server_settings[option]) is str:
1701
server_settings[option] = unicode(server_settings[option])
1702
745
# Now we have our good server settings in "server_settings"
1704
##################################################################
1707
debug = server_settings[u"debug"]
1708
debuglevel = server_settings[u"debuglevel"]
1709
use_dbus = server_settings[u"use_dbus"]
1710
use_ipv6 = server_settings[u"use_ipv6"]
1712
if server_settings[u"servicename"] != u"Mandos":
1713
syslogger.setFormatter(logging.Formatter
1714
(u'Mandos (%s) [%%(process)d]:'
1715
u' %%(levelname)s: %%(message)s'
1716
% server_settings[u"servicename"]))
747
debug = server_settings["debug"]
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
757
% server_settings["servicename"]))
1718
759
# Parse config file with clients
1719
client_defaults = { u"timeout": u"1h",
1721
u"checker": u"fping -q -- %%(host)s",
1723
u"approved_delay": u"0s",
1724
u"approved_duration": u"1s",
760
client_defaults = { "timeout": "1h",
762
"checker": "fping -q -- %(host)s",
1726
client_config = configparser.SafeConfigParser(client_defaults)
1727
client_config.read(os.path.join(server_settings[u"configdir"],
1730
global mandos_dbus_service
1731
mandos_dbus_service = None
1733
tcp_server = MandosServer((server_settings[u"address"],
1734
server_settings[u"port"]),
1736
interface=(server_settings[u"interface"]
1740
server_settings[u"priority"],
1742
pidfilename = u"/var/run/mandos.pid"
1744
pidfile = open(pidfilename, u"w")
1746
logger.error(u"Could not open file %r", pidfilename)
1749
uid = pwd.getpwnam(u"_mandos").pw_uid
1750
gid = pwd.getpwnam(u"_mandos").pw_gid
1753
uid = pwd.getpwnam(u"mandos").pw_uid
1754
gid = pwd.getpwnam(u"mandos").pw_gid
1757
uid = pwd.getpwnam(u"nobody").pw_uid
1758
gid = pwd.getpwnam(u"nobody").pw_gid
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
773
settings=server_settings,
775
pidfilename = "/var/run/mandos.pid"
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
784
uid = pwd.getpwnam("mandos").pw_uid
787
uid = pwd.getpwnam("nobody").pw_uid
791
gid = pwd.getpwnam("mandos").pw_gid
794
gid = pwd.getpwnam("nogroup").pw_gid
1765
800
except OSError, error:
1766
801
if error[0] != errno.EPERM:
1769
# Enable all possible GnuTLS debugging
1772
if not debug and not debuglevel:
1773
syslogger.setLevel(logging.WARNING)
1774
console.setLevel(logging.WARNING)
1776
level = getattr(logging, debuglevel.upper())
1777
syslogger.setLevel(level)
1778
console.setLevel(level)
1781
# "Use a log level over 10 to enable all debugging options."
1783
gnutls.library.functions.gnutls_global_set_log_level(11)
1785
@gnutls.library.types.gnutls_log_func
1786
def debug_gnutls(level, string):
1787
logger.debug(u"GnuTLS: %s", string[:-1])
1789
(gnutls.library.functions
1790
.gnutls_global_set_log_function(debug_gnutls))
1792
# Redirect stdin so all checkers get /dev/null
1793
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1794
os.dup2(null, sys.stdin.fileno())
1798
# No console logging
1799
logger.removeHandler(console)
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
1802
811
global main_loop
1803
814
# From the Avahi example code
1804
815
DBusGMainLoop(set_as_default=True )
1805
816
main_loop = gobject.MainLoop()
1806
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
1807
821
# End of Avahi example code
1810
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1811
bus, do_not_queue=True)
1812
except dbus.exceptions.NameExistsException, e:
1813
logger.error(unicode(e) + u", disabling D-Bus")
1815
server_settings[u"use_dbus"] = False
1816
tcp_server.use_dbus = False
1817
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1818
service = AvahiService(name = server_settings[u"servicename"],
1819
servicetype = u"_mandos._tcp",
1820
protocol = protocol, bus = bus)
1821
if server_settings["interface"]:
1822
service.interface = (if_nametoindex
1823
(str(server_settings[u"interface"])))
823
def remove_from_clients(client):
824
clients.remove(client)
826
logger.critical(u"No clients left, exiting")
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
835
logger.critical(u"No clients defined")
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
846
logger.removeHandler(console)
1826
847
# Close all input and output, do double fork, etc.
1829
global multiprocessing_manager
1830
multiprocessing_manager = multiprocessing.Manager()
1832
client_class = Client
1834
client_class = functools.partial(ClientDBus, bus = bus)
1835
def client_config_items(config, section):
1836
special_settings = {
1837
"approved_by_default":
1838
lambda: config.getboolean(section,
1839
"approved_by_default"),
1841
for name, value in config.items(section):
1843
yield (name, special_settings[name]())
1847
tcp_server.clients.update(set(
1848
client_class(name = section,
1849
config= dict(client_config_items(
1850
client_config, section)))
1851
for section in client_config.sections()))
1852
if not tcp_server.clients:
1853
logger.warning(u"No clients defined")
1858
pidfile.write(str(pid) + "\n")
852
pidfile.write(str(pid) + "\n")
1861
856
logger.error(u"Could not write to file %r with PID %d",
1862
857
pidfilename, pid)
1863
858
except NameError: