251
106
max_renames: integer; maximum number of renames
252
107
rename_count: integer; counter so we only rename after collisions
253
108
a sensible number of times
254
group: D-Bus Entry Group
256
bus: dbus.SystemBus()
259
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
servicetype = None, port = None, TXT = None,
261
domain = "", host = "", max_renames = 32768,
262
protocol = avahi.PROTO_UNSPEC, bus = None):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
263
113
self.interface = interface
265
self.type = servicetype
267
self.TXT = TXT if TXT is not None else []
268
121
self.domain = domain
270
123
self.rename_count = 0
271
124
self.max_renames = max_renames
272
self.protocol = protocol
273
self.group = None # our entry group
276
self.entry_group_state_changed_match = None
278
125
def rename(self):
279
126
"""Derived from the Avahi example code"""
280
127
if self.rename_count >= self.max_renames:
281
logger.critical("No suitable Zeroconf service name found"
282
" after %i retries, exiting.",
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
284
131
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
287
logger.info("Changing Zeroconf service name to %r ...",
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
292
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
296
140
self.rename_count += 1
298
141
def remove(self):
299
142
"""Derived from the Avahi example code"""
300
if self.entry_group_state_changed_match is not None:
301
self.entry_group_state_changed_match.remove()
302
self.entry_group_state_changed_match = None
303
if self.group is not None:
143
if group is not None:
307
146
"""Derived from the Avahi example code"""
309
if self.group is None:
310
self.group = dbus.Interface(
311
self.bus.get_object(avahi.DBUS_NAME,
312
self.server.EntryGroupNew()),
313
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
self.entry_group_state_changed_match = (
315
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
317
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
self.name, self.type)
319
self.group.AddService(
322
dbus.UInt32(0), # flags
323
self.name, self.type,
324
self.domain, self.host,
325
dbus.UInt16(self.port),
326
avahi.string_array_to_txt_array(self.TXT))
329
def entry_group_state_changed(self, state, error):
330
"""Derived from the Avahi example code"""
331
logger.debug("Avahi entry group state change: %i", state)
333
if state == avahi.ENTRY_GROUP_ESTABLISHED:
334
logger.debug("Zeroconf service established.")
335
elif state == avahi.ENTRY_GROUP_COLLISION:
336
logger.info("Zeroconf service name collision.")
338
elif state == avahi.ENTRY_GROUP_FAILURE:
339
logger.critical("Avahi: Error in group state changed %s",
341
raise AvahiGroupError("State changed: {!s}"
345
"""Derived from the Avahi example code"""
346
if self.group is not None:
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
355
def server_state_changed(self, state, error=None):
356
"""Derived from the Avahi example code"""
357
logger.debug("Avahi server state change: %i", state)
358
bad_states = { avahi.SERVER_INVALID:
359
"Zeroconf server invalid",
360
avahi.SERVER_REGISTERING: None,
361
avahi.SERVER_COLLISION:
362
"Zeroconf server name collision",
363
avahi.SERVER_FAILURE:
364
"Zeroconf server failure" }
365
if state in bad_states:
366
if bad_states[state] is not None:
368
logger.error(bad_states[state])
370
logger.error(bad_states[state] + ": %r", error)
372
elif state == avahi.SERVER_RUNNING:
376
logger.debug("Unknown state: %r", state)
378
logger.debug("Unknown state: %r: %r", state, error)
381
"""Derived from the Avahi example code"""
382
if self.server is None:
383
self.server = dbus.Interface(
384
self.bus.get_object(avahi.DBUS_NAME,
385
avahi.DBUS_PATH_SERVER,
386
follow_name_owner_changes=True),
387
avahi.DBUS_INTERFACE_SERVER)
388
self.server.connect_to_signal("StateChanged",
389
self.server_state_changed)
390
self.server_state_changed(self.server.GetState())
393
class AvahiServiceToSyslog(AvahiService):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
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)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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
404
172
class Client(object):
405
173
"""A representation of a client host served by this server.
408
approved: bool(); 'None' if not yet approved/disapproved
409
approval_delay: datetime.timedelta(); Time to wait for approval
410
approval_duration: datetime.timedelta(); Duration of one approval
411
checker: subprocess.Popen(); a running checker process used
412
to see if the client lives.
413
'None' if no process is running.
414
checker_callback_tag: a gobject event source tag, or None
415
checker_command: string; External command which is run to check
416
if client lives. %() expansions are done at
175
name: string; from the config file, used in log messages
176
fingerprint: string (40 or 32 hexadecimal digits); used to
177
uniquely identify the client
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.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
191
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
417
194
runtime with vars(self) as dict, so that for
418
195
instance %(name)s can be used in the command.
419
checker_initiator_tag: a gobject event source tag, or None
420
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
current_checker_command: string; current running checker_command
424
disable_initiator_tag: a gobject event source tag, or None
426
fingerprint: string (40 or 32 hexadecimal digits); used to
427
uniquely identify the client
428
host: string; available for use by the checker command
429
interval: datetime.timedelta(); How often to start a new checker
430
last_approval_request: datetime.datetime(); (UTC) or None
431
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
436
name: string; from the config file, used in log messages and
438
secret: bytestring; sent verbatim (over TLS) to client
439
timeout: datetime.timedelta(); How long from last_checked_ok
440
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
runtime_expansions: Allowed attributes for runtime expansion.
443
expires: datetime.datetime(); time (UTC) when a client will be
445
server_settings: The server_settings dict from main()
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
448
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
452
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
456
"checker": "fping -q -- %%(host)s",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
484
client["fingerprint"] = (section["fingerprint"].upper()
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
492
client["secret"] = secfile.read()
494
raise TypeError("No secret or secfile for section {}"
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
511
def __init__(self, settings, name = None, server_settings=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={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
513
if server_settings is None:
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
527
self.last_enabled = None
530
logger.debug("Creating client %r", self.name)
230
logger.debug(u"Creating client %r", self.name)
531
231
# Uppercase and remove spaces from fingerprint for later
532
232
# comparison purposes with return value from the fingerprint()
534
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
538
# attributes specific for this server instance
234
self.fingerprint = config["fingerprint"].upper()\
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
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()
244
raise TypeError(u"No secret or secfile for client %s"
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
539
252
self.checker = None
540
253
self.checker_initiator_tag = None
541
self.disable_initiator_tag = None
254
self.stop_initiator_tag = None
542
255
self.checker_callback_tag = None
543
self.current_checker_command = None
545
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
554
for name, t in inspect.getmembers(type(self),
558
if not name.startswith("_"):
559
self.client_structure.append(name)
561
# Send notice to process children that client state has changed
562
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
256
self.check_command = config["checker"]
567
258
"""Start this client's checker and timeout hooks"""
568
if getattr(self, "enabled", False):
571
self.expires = datetime.datetime.utcnow() + self.timeout
573
self.last_enabled = datetime.datetime.utcnow()
575
self.send_changedstate()
577
def disable(self, quiet=True):
578
"""Disable this client."""
579
if not getattr(self, "enabled", False):
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
593
self.send_changedstate()
594
# Do not run this again if called by a gobject.timeout_add
600
def init_checker(self):
601
259
# Schedule a new checker to be started an 'interval' from now,
602
260
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
607
.total_seconds() * 1000),
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
614
.total_seconds() * 1000),
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
616
264
# Also start a new checker *right now*.
617
265
self.start_checker()
619
def checker_callback(self, pid, condition, command):
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)
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):
284
gobject.source_remove(self.checker_initiator_tag)
285
self.checker_initiator_tag = None
289
# Do not run this again if called by a gobject.timeout_add
292
self.stop_hook = None
294
def checker_callback(self, pid, condition):
620
295
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
621
297
self.checker_callback_tag = None
622
298
self.checker = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
626
logger.info("Checker for %(name)s succeeded",
630
logger.info("Checker for %(name)s failed",
633
self.last_checker_status = -1
634
logger.warning("Checker for %(name)s crashed?",
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):
309
logger.warning(u"Checker for %(name)s crashed?",
637
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
639
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
646
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
656
def need_approval(self):
657
self.last_approval_request = datetime.datetime.utcnow()
312
logger.info(u"Checker for %(name)s failed",
659
314
def start_checker(self):
660
315
"""Start a new checker subprocess if one is not running.
662
316
If a checker already exists, leave it running and do
664
318
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
319
# did that, then if a checker (for some reason) started
320
# running slowly and taking more than 'interval' time, the
321
# client would inevitably timeout, since no checker would get
322
# a chance to run to completion. If we instead leave running
669
323
# checkers alone, the checker would have to take more time
670
# than 'timeout' for the client to be disabled, which is as it
673
# If a checker exists, make sure it is not a zombie
675
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
678
except OSError as error:
679
if error.errno != errno.ECHILD:
683
logger.warning("Checker was a zombie")
684
gobject.source_remove(self.checker_callback_tag)
685
self.checker_callback(pid, status,
686
self.current_checker_command)
687
# Start a new checker if needed
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
688
326
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
699
self.current_checker_command = command
701
logger.info("Starting checker %r for %s",
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
331
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
334
vars(self).iteritems())
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
340
return True # Try again later
342
logger.info(u"Starting checker %r for %s",
702
343
command, self.name)
703
344
# We don't need to redirect stdout and stderr, since
704
345
# in normal mode, that is already done by daemon(),
705
346
# and in debug mode we don't want to. (Stdin is
706
347
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
715
348
self.checker = subprocess.Popen(command,
719
except OSError as error:
720
logger.error("Failed to start subprocess",
723
self.checker_callback_tag = (gobject.child_watch_add
725
self.checker_callback,
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
730
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
351
self.checker_callback_tag = gobject.child_watch_add\
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
741
357
# Re-run this periodically if run by gobject.timeout_add
744
359
def stop_checker(self):
745
360
"""Force the checker process, if any, to stop."""
746
361
if self.checker_callback_tag:
748
363
self.checker_callback_tag = None
749
364
if getattr(self, "checker", None) is None:
751
logger.debug("Stopping checker for %(name)s", vars(self))
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
753
self.checker.terminate()
368
os.kill(self.checker.pid, signal.SIGTERM)
755
370
#if self.checker.poll() is None:
756
# self.checker.kill()
757
except OSError as error:
371
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
758
373
if error.errno != errno.ESRCH: # No such process
760
375
self.checker = None
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
765
"""Decorators for marking methods of a DBusObjectWithProperties to
766
become properties on the D-Bus.
768
The decorated method will be called with no arguments by "Get"
769
and with one argument by "Set".
771
The parameters, where they are supported, are the same as
772
dbus.service.method, except there is only "signature", since the
773
type from Get() and the type sent to Set() is the same.
775
# Encoding deeply encoded byte arrays is not supported yet by the
776
# "Set" method, so we fail early here:
777
if byte_arrays and signature != "ay":
778
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
781
func._dbus_is_property = True
782
func._dbus_interface = dbus_interface
783
func._dbus_signature = signature
784
func._dbus_access = access
785
func._dbus_name = func.__name__
786
if func._dbus_name.endswith("_dbus_property"):
787
func._dbus_name = func._dbus_name[:-14]
788
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
816
@dbus_service_property("org.example.Interface", signature="b",
818
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property."
820
"EmitsChangedSignal": "false"})
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
825
func._dbus_annotations = annotations
830
class DBusPropertyException(dbus.exceptions.DBusException):
831
"""A base class for D-Bus property-related exceptions
835
class DBusPropertyAccessException(DBusPropertyException):
836
"""A property's access permissions disallows an operation.
841
class DBusPropertyNotFound(DBusPropertyException):
842
"""An attempt was made to access a non-existing property.
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
865
def _get_all_dbus_things(self, thing):
866
"""Returns a generator of (name, attribute) pairs
868
return ((getattr(athing.__get__(self), "_dbus_name",
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
876
def _get_dbus_property(self, interface_name, property_name):
877
"""Returns a bound method if one exists which is a D-Bus
878
property with the specified name and interface.
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
895
def Get(self, interface_name, property_name):
896
"""Standard D-Bus property Get() method, see D-Bus standard.
898
prop = self._get_dbus_property(interface_name, property_name)
899
if prop._dbus_access == "write":
900
raise DBusPropertyAccessException(property_name)
902
if not hasattr(value, "variant_level"):
904
return type(value)(value, variant_level=value.variant_level+1)
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
907
def Set(self, interface_name, property_name, value):
908
"""Standard D-Bus property Set() method, see D-Bus standard.
910
prop = self._get_dbus_property(interface_name, property_name)
911
if prop._dbus_access == "read":
912
raise DBusPropertyAccessException(property_name)
913
if prop._dbus_get_args_options["byte_arrays"]:
914
# The byte_arrays option is not supported yet on
915
# signatures other than "ay".
916
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
924
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
925
out_signature="a{sv}")
926
def GetAll(self, interface_name):
927
"""Standard D-Bus property GetAll() method, see D-Bus
930
Note: Will not include properties with access="write".
933
for name, prop in self._get_all_dbus_things("property"):
935
and interface_name != prop._dbus_interface):
936
# Interface non-empty but did not match
938
# Ignore write-only properties
939
if prop._dbus_access == "write":
942
if not hasattr(value, "variant_level"):
943
properties[name] = value
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
949
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
951
path_keyword='object_path',
952
connection_keyword='connection')
953
def Introspect(self, object_path, connection):
954
"""Overloading of standard D-Bus method.
956
Inserts property tags and interface annotation tags.
958
xmlstring = dbus.service.Object.Introspect(self, object_path,
961
document = xml.dom.minidom.parseString(xmlstring)
962
def make_tag(document, name, prop):
963
e = document.createElement("property")
964
e.setAttribute("name", name)
965
e.setAttribute("type", prop._dbus_signature)
966
e.setAttribute("access", prop._dbus_access)
968
for if_tag in document.getElementsByTagName("interface"):
970
for tag in (make_tag(document, name, prop)
972
in self._get_all_dbus_things("property")
973
if prop._dbus_interface
974
== if_tag.getAttribute("name")):
975
if_tag.appendChild(tag)
976
# Add annotation tags
977
for typ in ("method", "signal", "property"):
978
for tag in if_tag.getElementsByTagName(typ):
980
for name, prop in (self.
981
_get_all_dbus_things(typ)):
982
if (name == tag.getAttribute("name")
983
and prop._dbus_interface
984
== if_tag.getAttribute("name")):
985
annots.update(getattr
989
for name, value in annots.items():
990
ann_tag = document.createElement(
992
ann_tag.setAttribute("name", name)
993
ann_tag.setAttribute("value", value)
994
tag.appendChild(ann_tag)
995
# Add interface annotation tags
996
for annotation, value in dict(
997
itertools.chain.from_iterable(
998
annotations().items()
999
for name, annotations in
1000
self._get_all_dbus_things("interface")
1001
if name == if_tag.getAttribute("name")
1003
ann_tag = document.createElement("annotation")
1004
ann_tag.setAttribute("name", annotation)
1005
ann_tag.setAttribute("value", value)
1006
if_tag.appendChild(ann_tag)
1007
# Add the names to the return values for the
1008
# "org.freedesktop.DBus.Properties" methods
1009
if (if_tag.getAttribute("name")
1010
== "org.freedesktop.DBus.Properties"):
1011
for cn in if_tag.getElementsByTagName("method"):
1012
if cn.getAttribute("name") == "Get":
1013
for arg in cn.getElementsByTagName("arg"):
1014
if (arg.getAttribute("direction")
1016
arg.setAttribute("name", "value")
1017
elif cn.getAttribute("name") == "GetAll":
1018
for arg in cn.getElementsByTagName("arg"):
1019
if (arg.getAttribute("direction")
1021
arg.setAttribute("name", "props")
1022
xmlstring = document.toxml("utf-8")
1024
except (AttributeError, xml.dom.DOMException,
1025
xml.parsers.expat.ExpatError) as error:
1026
logger.error("Failed to override Introspection method",
1031
def datetime_to_dbus(dt, variant_level=0):
1032
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1034
return dbus.String("", variant_level = variant_level)
1035
return dbus.String(dt.isoformat(),
1036
variant_level=variant_level)
1039
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1040
"""A class decorator; applied to a subclass of
1041
dbus.service.Object, it will add alternate D-Bus attributes with
1042
interface names according to the "alt_interface_names" mapping.
1045
@alternate_dbus_interfaces({"org.example.Interface":
1046
"net.example.AlternateInterface"})
1047
class SampleDBusObject(dbus.service.Object):
1048
@dbus.service.method("org.example.Interface")
1049
def SampleDBusMethod():
1052
The above "SampleDBusMethod" on "SampleDBusObject" will be
1053
reachable via two interfaces: "org.example.Interface" and
1054
"net.example.AlternateInterface", the latter of which will have
1055
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1056
"true", unless "deprecate" is passed with a False value.
1058
This works for methods and signals, and also for D-Bus properties
1059
(from DBusObjectWithProperties) and interfaces (from the
1060
dbus_interface_annotations decorator).
1063
for orig_interface_name, alt_interface_name in (
1064
alt_interface_names.items()):
1066
interface_names = set()
1067
# Go though all attributes of the class
1068
for attrname, attribute in inspect.getmembers(cls):
1069
# Ignore non-D-Bus attributes, and D-Bus attributes
1070
# with the wrong interface name
1071
if (not hasattr(attribute, "_dbus_interface")
1072
or not attribute._dbus_interface
1073
.startswith(orig_interface_name)):
1075
# Create an alternate D-Bus interface name based on
1077
alt_interface = (attribute._dbus_interface
1078
.replace(orig_interface_name,
1079
alt_interface_name))
1080
interface_names.add(alt_interface)
1081
# Is this a D-Bus signal?
1082
if getattr(attribute, "_dbus_is_signal", False):
1083
# Extract the original non-method undecorated
1084
# function by black magic
1085
nonmethod_func = (dict(
1086
zip(attribute.func_code.co_freevars,
1087
attribute.__closure__))["func"]
1089
# Create a new, but exactly alike, function
1090
# object, and decorate it to be a new D-Bus signal
1091
# with the alternate D-Bus interface name
1092
new_function = (dbus.service.signal
1094
attribute._dbus_signature)
1095
(types.FunctionType(
1096
nonmethod_func.func_code,
1097
nonmethod_func.func_globals,
1098
nonmethod_func.func_name,
1099
nonmethod_func.func_defaults,
1100
nonmethod_func.func_closure)))
1101
# Copy annotations, if any
1103
new_function._dbus_annotations = (
1104
dict(attribute._dbus_annotations))
1105
except AttributeError:
1107
# Define a creator of a function to call both the
1108
# original and alternate functions, so both the
1109
# original and alternate signals gets sent when
1110
# the function is called
1111
def fixscope(func1, func2):
1112
"""This function is a scope container to pass
1113
func1 and func2 to the "call_both" function
1114
outside of its arguments"""
1115
def call_both(*args, **kwargs):
1116
"""This function will emit two D-Bus
1117
signals by calling func1 and func2"""
1118
func1(*args, **kwargs)
1119
func2(*args, **kwargs)
1121
# Create the "call_both" function and add it to
1123
attr[attrname] = fixscope(attribute, new_function)
1124
# Is this a D-Bus method?
1125
elif getattr(attribute, "_dbus_is_method", False):
1126
# Create a new, but exactly alike, function
1127
# object. Decorate it to be a new D-Bus method
1128
# with the alternate D-Bus interface name. Add it
1130
attr[attrname] = (dbus.service.method
1132
attribute._dbus_in_signature,
1133
attribute._dbus_out_signature)
1135
(attribute.func_code,
1136
attribute.func_globals,
1137
attribute.func_name,
1138
attribute.func_defaults,
1139
attribute.func_closure)))
1140
# Copy annotations, if any
1142
attr[attrname]._dbus_annotations = (
1143
dict(attribute._dbus_annotations))
1144
except AttributeError:
1146
# Is this a D-Bus property?
1147
elif getattr(attribute, "_dbus_is_property", False):
1148
# Create a new, but exactly alike, function
1149
# object, and decorate it to be a new D-Bus
1150
# property with the alternate D-Bus interface
1151
# name. Add it to the class.
1152
attr[attrname] = (dbus_service_property
1154
attribute._dbus_signature,
1155
attribute._dbus_access,
1157
._dbus_get_args_options
1160
(attribute.func_code,
1161
attribute.func_globals,
1162
attribute.func_name,
1163
attribute.func_defaults,
1164
attribute.func_closure)))
1165
# Copy annotations, if any
1167
attr[attrname]._dbus_annotations = (
1168
dict(attribute._dbus_annotations))
1169
except AttributeError:
1171
# Is this a D-Bus interface?
1172
elif getattr(attribute, "_dbus_is_interface", False):
1173
# Create a new, but exactly alike, function
1174
# object. Decorate it to be a new D-Bus interface
1175
# with the alternate D-Bus interface name. Add it
1177
attr[attrname] = (dbus_interface_annotations
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1186
# Deprecate all alternate interfaces
1187
iname="_AlternateDBusNames_interface_annotation{}"
1188
for interface_name in interface_names:
1189
@dbus_interface_annotations(interface_name)
1191
return { "org.freedesktop.DBus.Deprecated":
1193
# Find an unused name
1194
for aname in (iname.format(i)
1195
for i in itertools.count()):
1196
if aname not in attr:
1200
# Replace the class with a new subclass of it with
1201
# methods, signals, etc. as created above.
1202
cls = type(b"{}Alternate".format(cls.__name__),
1208
@alternate_dbus_interfaces({"se.recompile.Mandos":
1209
"se.bsnet.fukt.Mandos"})
1210
class ClientDBus(Client, DBusObjectWithProperties):
1211
"""A Client class using D-Bus
1214
dbus_object_path: dbus.ObjectPath
1215
bus: dbus.SystemBus()
1218
runtime_expansions = (Client.runtime_expansions
1219
+ ("dbus_object_path",))
1221
# dbus.service.Object doesn't use super(), so we can't either.
1223
def __init__(self, bus = None, *args, **kwargs):
1225
Client.__init__(self, *args, **kwargs)
1226
# Only now, when this client is initialized, can it show up on
1228
client_object_name = str(self.name).translate(
1229
{ord("."): ord("_"),
1230
ord("-"): ord("_")})
1231
self.dbus_object_path = (dbus.ObjectPath
1232
("/clients/" + client_object_name))
1233
DBusObjectWithProperties.__init__(self, self.bus,
1234
self.dbus_object_path)
1236
def notifychangeproperty(transform_func,
1237
dbus_name, type_func=lambda x: x,
1239
""" Modify a variable so that it's a property which announces
1240
its changes to DBus.
1242
transform_fun: Function that takes a value and a variant_level
1243
and transforms it to a D-Bus type.
1244
dbus_name: D-Bus name of the variable
1245
type_func: Function that transform the value before sending it
1246
to the D-Bus. Default: no transform
1247
variant_level: D-Bus variant level. Default: 1
1249
attrname = "_{}".format(dbus_name)
1250
def setter(self, value):
1251
if hasattr(self, "dbus_object_path"):
1252
if (not hasattr(self, attrname) or
1253
type_func(getattr(self, attrname, None))
1254
!= type_func(value)):
1255
dbus_value = transform_func(type_func(value),
1258
self.PropertyChanged(dbus.String(dbus_name),
1260
setattr(self, attrname, value)
1262
return property(lambda self: getattr(self, attrname), setter)
1264
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1265
approvals_pending = notifychangeproperty(dbus.Boolean,
1268
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1269
last_enabled = notifychangeproperty(datetime_to_dbus,
1271
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1272
type_func = lambda checker:
1273
checker is not None)
1274
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1276
last_checker_status = notifychangeproperty(dbus.Int16,
1277
"LastCheckerStatus")
1278
last_approval_request = notifychangeproperty(
1279
datetime_to_dbus, "LastApprovalRequest")
1280
approved_by_default = notifychangeproperty(dbus.Boolean,
1281
"ApprovedByDefault")
1282
approval_delay = notifychangeproperty(dbus.UInt64,
1285
lambda td: td.total_seconds()
1287
approval_duration = notifychangeproperty(
1288
dbus.UInt64, "ApprovalDuration",
1289
type_func = lambda td: td.total_seconds() * 1000)
1290
host = notifychangeproperty(dbus.String, "Host")
1291
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1292
type_func = lambda td:
1293
td.total_seconds() * 1000)
1294
extended_timeout = notifychangeproperty(
1295
dbus.UInt64, "ExtendedTimeout",
1296
type_func = lambda td: td.total_seconds() * 1000)
1297
interval = notifychangeproperty(dbus.UInt64,
1300
lambda td: td.total_seconds()
1302
checker_command = notifychangeproperty(dbus.String, "Checker")
1304
del notifychangeproperty
1306
def __del__(self, *args, **kwargs):
1308
self.remove_from_connection()
1311
if hasattr(DBusObjectWithProperties, "__del__"):
1312
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1313
Client.__del__(self, *args, **kwargs)
1315
def checker_callback(self, pid, condition, command,
1317
self.checker_callback_tag = None
1319
if os.WIFEXITED(condition):
1320
exitstatus = os.WEXITSTATUS(condition)
1322
self.CheckerCompleted(dbus.Int16(exitstatus),
1323
dbus.Int64(condition),
1324
dbus.String(command))
1327
self.CheckerCompleted(dbus.Int16(-1),
1328
dbus.Int64(condition),
1329
dbus.String(command))
1331
return Client.checker_callback(self, pid, condition, command,
1334
def start_checker(self, *args, **kwargs):
1335
old_checker_pid = getattr(self.checker, "pid", None)
1336
r = Client.start_checker(self, *args, **kwargs)
1337
# Only if new checker process was started
1338
if (self.checker is not None
1339
and old_checker_pid != self.checker.pid):
1341
self.CheckerStarted(self.current_checker_command)
1344
def _reset_approved(self):
1345
self.approved = None
1348
def approve(self, value=True):
1349
self.approved = value
1350
gobject.timeout_add(int(self.approval_duration.total_seconds()
1351
* 1000), self._reset_approved)
1352
self.send_changedstate()
1354
## D-Bus methods, signals & properties
1355
_interface = "se.recompile.Mandos.Client"
1359
@dbus_interface_annotations(_interface)
1361
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1366
# CheckerCompleted - signal
1367
@dbus.service.signal(_interface, signature="nxs")
1368
def CheckerCompleted(self, exitcode, waitstatus, command):
1372
# CheckerStarted - signal
1373
@dbus.service.signal(_interface, signature="s")
1374
def CheckerStarted(self, command):
1378
# PropertyChanged - signal
1379
@dbus.service.signal(_interface, signature="sv")
1380
def PropertyChanged(self, property, value):
1384
# GotSecret - signal
1385
@dbus.service.signal(_interface)
1386
def GotSecret(self):
1388
Is sent after a successful transfer of secret from the Mandos
1389
server to mandos-client
1394
@dbus.service.signal(_interface, signature="s")
1395
def Rejected(self, reason):
1399
# NeedApproval - signal
1400
@dbus.service.signal(_interface, signature="tb")
1401
def NeedApproval(self, timeout, default):
1403
return self.need_approval()
1408
@dbus.service.method(_interface, in_signature="b")
1409
def Approve(self, value):
1412
# CheckedOK - method
1413
@dbus.service.method(_interface)
1414
def CheckedOK(self):
1418
@dbus.service.method(_interface)
1423
# StartChecker - method
1424
@dbus.service.method(_interface)
1425
def StartChecker(self):
1427
self.start_checker()
1430
@dbus.service.method(_interface)
1435
# StopChecker - method
1436
@dbus.service.method(_interface)
1437
def StopChecker(self):
1442
# ApprovalPending - property
1443
@dbus_service_property(_interface, signature="b", access="read")
1444
def ApprovalPending_dbus_property(self):
1445
return dbus.Boolean(bool(self.approvals_pending))
1447
# ApprovedByDefault - property
1448
@dbus_service_property(_interface, signature="b",
1450
def ApprovedByDefault_dbus_property(self, value=None):
1451
if value is None: # get
1452
return dbus.Boolean(self.approved_by_default)
1453
self.approved_by_default = bool(value)
1455
# ApprovalDelay - property
1456
@dbus_service_property(_interface, signature="t",
1458
def ApprovalDelay_dbus_property(self, value=None):
1459
if value is None: # get
1460
return dbus.UInt64(self.approval_delay.total_seconds()
1462
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1464
# ApprovalDuration - property
1465
@dbus_service_property(_interface, signature="t",
1467
def ApprovalDuration_dbus_property(self, value=None):
1468
if value is None: # get
1469
return dbus.UInt64(self.approval_duration.total_seconds()
1471
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1474
@dbus_service_property(_interface, signature="s", access="read")
1475
def Name_dbus_property(self):
1476
return dbus.String(self.name)
1478
# Fingerprint - property
1479
@dbus_service_property(_interface, signature="s", access="read")
1480
def Fingerprint_dbus_property(self):
1481
return dbus.String(self.fingerprint)
1484
@dbus_service_property(_interface, signature="s",
1486
def Host_dbus_property(self, value=None):
1487
if value is None: # get
1488
return dbus.String(self.host)
1489
self.host = str(value)
1491
# Created - property
1492
@dbus_service_property(_interface, signature="s", access="read")
1493
def Created_dbus_property(self):
1494
return datetime_to_dbus(self.created)
1496
# LastEnabled - property
1497
@dbus_service_property(_interface, signature="s", access="read")
1498
def LastEnabled_dbus_property(self):
1499
return datetime_to_dbus(self.last_enabled)
1501
# Enabled - property
1502
@dbus_service_property(_interface, signature="b",
1504
def Enabled_dbus_property(self, value=None):
1505
if value is None: # get
1506
return dbus.Boolean(self.enabled)
1512
# LastCheckedOK - property
1513
@dbus_service_property(_interface, signature="s",
1515
def LastCheckedOK_dbus_property(self, value=None):
1516
if value is not None:
1519
return datetime_to_dbus(self.last_checked_ok)
1521
# LastCheckerStatus - property
1522
@dbus_service_property(_interface, signature="n",
1524
def LastCheckerStatus_dbus_property(self):
1525
return dbus.Int16(self.last_checker_status)
1527
# Expires - property
1528
@dbus_service_property(_interface, signature="s", access="read")
1529
def Expires_dbus_property(self):
1530
return datetime_to_dbus(self.expires)
1532
# LastApprovalRequest - property
1533
@dbus_service_property(_interface, signature="s", access="read")
1534
def LastApprovalRequest_dbus_property(self):
1535
return datetime_to_dbus(self.last_approval_request)
1537
# Timeout - property
1538
@dbus_service_property(_interface, signature="t",
1540
def Timeout_dbus_property(self, value=None):
1541
if value is None: # get
1542
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1543
old_timeout = self.timeout
1544
self.timeout = datetime.timedelta(0, 0, 0, value)
1545
# Reschedule disabling
1547
now = datetime.datetime.utcnow()
1548
self.expires += self.timeout - old_timeout
1549
if self.expires <= now:
1550
# The timeout has passed
1553
if (getattr(self, "disable_initiator_tag", None)
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
int((self.expires - now).total_seconds()
1560
* 1000), self.disable))
1562
# ExtendedTimeout - property
1563
@dbus_service_property(_interface, signature="t",
1565
def ExtendedTimeout_dbus_property(self, value=None):
1566
if value is None: # get
1567
return dbus.UInt64(self.extended_timeout.total_seconds()
1569
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1571
# Interval - property
1572
@dbus_service_property(_interface, signature="t",
1574
def Interval_dbus_property(self, value=None):
1575
if value is None: # get
1576
return dbus.UInt64(self.interval.total_seconds() * 1000)
1577
self.interval = datetime.timedelta(0, 0, 0, value)
1578
if getattr(self, "checker_initiator_tag", None) is None:
1581
# Reschedule checker run
1582
gobject.source_remove(self.checker_initiator_tag)
1583
self.checker_initiator_tag = (gobject.timeout_add
1584
(value, self.start_checker))
1585
self.start_checker() # Start one now, too
1587
# Checker - property
1588
@dbus_service_property(_interface, signature="s",
1590
def Checker_dbus_property(self, value=None):
1591
if value is None: # get
1592
return dbus.String(self.checker_command)
1593
self.checker_command = str(value)
1595
# CheckerRunning - property
1596
@dbus_service_property(_interface, signature="b",
1598
def CheckerRunning_dbus_property(self, value=None):
1599
if value is None: # get
1600
return dbus.Boolean(self.checker is not None)
1602
self.start_checker()
1606
# ObjectPath - property
1607
@dbus_service_property(_interface, signature="o", access="read")
1608
def ObjectPath_dbus_property(self):
1609
return self.dbus_object_path # is already a dbus.ObjectPath
1612
@dbus_service_property(_interface, signature="ay",
1613
access="write", byte_arrays=True)
1614
def Secret_dbus_property(self, value):
1615
self.secret = bytes(value)
1620
class ProxyClient(object):
1621
def __init__(self, child_pipe, fpr, address):
1622
self._pipe = child_pipe
1623
self._pipe.send(('init', fpr, address))
1624
if not self._pipe.recv():
1627
def __getattribute__(self, name):
1629
return super(ProxyClient, self).__getattribute__(name)
1630
self._pipe.send(('getattr', name))
1631
data = self._pipe.recv()
1632
if data[0] == 'data':
1634
if data[0] == 'function':
1635
def func(*args, **kwargs):
1636
self._pipe.send(('funcall', name, args, kwargs))
1637
return self._pipe.recv()[1]
1640
def __setattr__(self, name, value):
1642
return super(ProxyClient, self).__setattr__(name, value)
1643
self._pipe.send(('setattr', name, value))
1646
class ClientHandler(socketserver.BaseRequestHandler, object):
1647
"""A class to handle client connections.
1649
Instantiated once for each connection to handle it.
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
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.
1650
442
Note: This will run in its own forked process."""
1652
444
def handle(self):
1653
with contextlib.closing(self.server.child_pipe) as child_pipe:
1654
logger.info("TCP connection from: %s",
1655
str(self.client_address))
1656
logger.debug("Pipe FD: %d",
1657
self.server.child_pipe.fileno())
1659
session = (gnutls.connection
1660
.ClientSession(self.request,
1662
.X509Credentials()))
1664
# Note: gnutls.connection.X509Credentials is really a
1665
# generic GnuTLS certificate credentials object so long as
1666
# no X.509 keys are added to it. Therefore, we can use it
1667
# here despite using OpenPGP certificates.
1669
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1670
# "+AES-256-CBC", "+SHA1",
1671
# "+COMP-NULL", "+CTYPE-OPENPGP",
1673
# Use a fallback default, since this MUST be set.
1674
priority = self.server.gnutls_priority
1675
if priority is None:
1677
(gnutls.library.functions
1678
.gnutls_priority_set_direct(session._c_object,
1681
# Start communication using the Mandos protocol
1682
# Get protocol number
1683
line = self.request.makefile().readline()
1684
logger.debug("Protocol version: %r", line)
1686
if int(line.strip().split()[0]) > 1:
1687
raise RuntimeError(line)
1688
except (ValueError, IndexError, RuntimeError) as error:
1689
logger.error("Unknown protocol version: %s", error)
1692
# Start GnuTLS connection
1695
except gnutls.errors.GNUTLSError as error:
1696
logger.warning("Handshake failed: %s", error)
1697
# Do not run session.bye() here: the session is not
1698
# established. Just abandon the request.
1700
logger.debug("Handshake succeeded")
1702
approval_required = False
1705
fpr = self.fingerprint(self.peer_certificate
1708
gnutls.errors.GNUTLSError) as error:
1709
logger.warning("Bad certificate: %s", error)
1711
logger.debug("Fingerprint: %s", fpr)
1714
client = ProxyClient(child_pipe, fpr,
1715
self.client_address)
1719
if client.approval_delay:
1720
delay = client.approval_delay
1721
client.approvals_pending += 1
1722
approval_required = True
1725
if not client.enabled:
1726
logger.info("Client %s is disabled",
1728
if self.server.use_dbus:
1730
client.Rejected("Disabled")
1733
if client.approved or not client.approval_delay:
1734
#We are approved or approval is disabled
1736
elif client.approved is None:
1737
logger.info("Client %s needs approval",
1739
if self.server.use_dbus:
1741
client.NeedApproval(
1742
client.approval_delay.total_seconds()
1743
* 1000, client.approved_by_default)
1745
logger.warning("Client %s was not approved",
1747
if self.server.use_dbus:
1749
client.Rejected("Denied")
1752
#wait until timeout or approved
1753
time = datetime.datetime.now()
1754
client.changedstate.acquire()
1755
client.changedstate.wait(delay.total_seconds())
1756
client.changedstate.release()
1757
time2 = datetime.datetime.now()
1758
if (time2 - time) >= delay:
1759
if not client.approved_by_default:
1760
logger.warning("Client %s timed out while"
1761
" waiting for approval",
1763
if self.server.use_dbus:
1765
client.Rejected("Approval timed out")
1770
delay -= time2 - time
1773
while sent_size < len(client.secret):
1775
sent = session.send(client.secret[sent_size:])
1776
except gnutls.errors.GNUTLSError as error:
1777
logger.warning("gnutls send failed",
1780
logger.debug("Sent: %d, remaining: %d",
1781
sent, len(client.secret)
1782
- (sent_size + sent))
1785
logger.info("Sending secret to %s", client.name)
1786
# bump the timeout using extended_timeout
1787
client.bump_timeout(client.extended_timeout)
1788
if self.server.use_dbus:
1793
if approval_required:
1794
client.approvals_pending -= 1
1797
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("GnuTLS bye failed",
1802
def peer_certificate(session):
1803
"Return the peer's OpenPGP certificate as a bytestring"
1804
# If not an OpenPGP certificate...
1805
if (gnutls.library.functions
1806
.gnutls_certificate_type_get(session._c_object)
1807
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1808
# ...do the normal thing
1809
return session.peer_certificate
1810
list_size = ctypes.c_uint(1)
1811
cert_list = (gnutls.library.functions
1812
.gnutls_certificate_get_peers
1813
(session._c_object, ctypes.byref(list_size)))
1814
if not bool(cert_list) and list_size.value != 0:
1815
raise gnutls.errors.GNUTLSError("error getting peer"
1817
if list_size.value == 0:
1820
return ctypes.string_at(cert.data, cert.size)
1823
def fingerprint(openpgp):
1824
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1825
# New GnuTLS "datum" with the OpenPGP public key
1826
datum = (gnutls.library.types
1827
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1830
ctypes.c_uint(len(openpgp))))
1831
# New empty GnuTLS certificate
1832
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1835
# Import the OpenPGP public key into the certificate
1836
(gnutls.library.functions
1837
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1838
gnutls.library.constants
1839
.GNUTLS_OPENPGP_FMT_RAW))
1840
# Verify the self signature in the key
1841
crtverify = ctypes.c_uint()
1842
(gnutls.library.functions
1843
.gnutls_openpgp_crt_verify_self(crt, 0,
1844
ctypes.byref(crtverify)))
1845
if crtverify.value != 0:
1846
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1847
raise (gnutls.errors.CertificateSecurityError
1849
# New buffer for the fingerprint
1850
buf = ctypes.create_string_buffer(20)
1851
buf_len = ctypes.c_size_t()
1852
# Get the fingerprint from the certificate into the buffer
1853
(gnutls.library.functions
1854
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1855
ctypes.byref(buf_len)))
1856
# Deinit the certificate
1857
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1858
# Convert the buffer to a Python bytestring
1859
fpr = ctypes.string_at(buf, buf_len.value)
1860
# Convert the bytestring to hexadecimal notation
1861
hex_fpr = binascii.hexlify(fpr).upper()
1865
class MultiprocessingMixIn(object):
1866
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1867
def sub_process_main(self, request, address):
1869
self.finish_request(request, address)
1871
self.handle_error(request, address)
1872
self.close_request(request)
1874
def process_request(self, request, address):
1875
"""Start a new process to process the request."""
1876
proc = multiprocessing.Process(target = self.sub_process_main,
1877
args = (request, address))
1882
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1883
""" adds a pipe to the MixIn """
1884
def process_request(self, request, client_address):
1885
"""Overrides and wraps the original process_request().
1887
This function creates a new pipe in self.pipe
1889
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1891
proc = MultiprocessingMixIn.process_request(self, request,
1893
self.child_pipe.close()
1894
self.add_pipe(parent_pipe, proc)
1896
def add_pipe(self, parent_pipe, proc):
1897
"""Dummy function; override as necessary"""
1898
raise NotImplementedError()
1901
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1902
socketserver.TCPServer, object):
1903
"""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
1906
521
enabled: Boolean; whether this server is activated yet
1907
interface: None or a network interface name (string)
1908
use_ipv6: Boolean; to use IPv6 or not
1910
def __init__(self, server_address, RequestHandlerClass,
1911
interface=None, use_ipv6=True, socketfd=None):
1912
"""If socketfd is set, use that file descriptor instead of
1913
creating a new one with socket.socket().
1915
self.interface = interface
1917
self.address_family = socket.AF_INET6
1918
if socketfd is not None:
1919
# Save the file descriptor
1920
self.socketfd = socketfd
1921
# Save the original socket.socket() function
1922
self.socket_socket = socket.socket
1923
# To implement --socket, we monkey patch socket.socket.
1925
# (When socketserver.TCPServer is a new-style class, we
1926
# could make self.socket into a property instead of monkey
1927
# patching socket.socket.)
1929
# Create a one-time-only replacement for socket.socket()
1930
@functools.wraps(socket.socket)
1931
def socket_wrapper(*args, **kwargs):
1932
# Restore original function so subsequent calls are
1934
socket.socket = self.socket_socket
1935
del self.socket_socket
1936
# This time only, return a new socket object from the
1937
# saved file descriptor.
1938
return socket.fromfd(self.socketfd, *args, **kwargs)
1939
# Replace socket.socket() function with wrapper
1940
socket.socket = socket_wrapper
1941
# The socketserver.TCPServer.__init__ will call
1942
# socket.socket(), which might be our replacement,
1943
# socket_wrapper(), if socketfd was set.
1944
socketserver.TCPServer.__init__(self, server_address,
1945
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)
1947
533
def server_bind(self):
1948
534
"""This overrides the normal server_bind() function
1949
535
to bind to an interface if one was specified, and also NOT to
1950
536
bind to an address or port if they were not specified."""
1951
if self.interface is not None:
1952
if SO_BINDTODEVICE is None:
1953
logger.error("SO_BINDTODEVICE does not exist;"
1954
" cannot bind to interface %s",
1958
self.socket.setsockopt(socket.SOL_SOCKET,
1960
(self.interface + "\0")
1962
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
elif error.errno == errno.ENOPROTOOPT:
1967
logger.error("SO_BINDTODEVICE not available;"
1968
" cannot bind to interface %s",
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
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"])
1975
551
# Only bind(2) the socket if we really need to.
1976
552
if self.server_address[0] or self.server_address[1]:
1977
553
if not self.server_address[0]:
1978
if self.address_family == socket.AF_INET6:
1979
any_address = "::" # in6addr_any
1981
any_address = "0.0.0.0" # INADDR_ANY
1982
self.server_address = (any_address,
555
self.server_address = (in6addr_any,
1983
556
self.server_address[1])
1984
557
elif not self.server_address[1]:
1985
558
self.server_address = (self.server_address[0],
1987
# if self.interface:
560
# if self.settings["interface"]:
1988
561
# self.server_address = (self.server_address[0],
1991
564
# if_nametoindex
1993
return socketserver.TCPServer.server_bind(self)
1996
class MandosServer(IPv6_TCPServer):
2000
clients: set of Client objects
2001
gnutls_priority GnuTLS priority string
2002
use_dbus: Boolean; to emit D-Bus signals or not
2004
Assumes a gobject.MainLoop event loop.
2006
def __init__(self, server_address, RequestHandlerClass,
2007
interface=None, use_ipv6=True, clients=None,
2008
gnutls_priority=None, use_dbus=True, socketfd=None):
2009
self.enabled = False
2010
self.clients = clients
2011
if self.clients is None:
2013
self.use_dbus = use_dbus
2014
self.gnutls_priority = gnutls_priority
2015
IPv6_TCPServer.__init__(self, server_address,
2016
RequestHandlerClass,
2017
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
567
return super(type(self), self).server_bind()
2020
568
def server_activate(self):
2021
569
if self.enabled:
2022
return socketserver.TCPServer.server_activate(self)
570
return super(type(self), self).server_activate()
2024
571
def enable(self):
2025
572
self.enabled = True
2027
def add_pipe(self, parent_pipe, proc):
2028
# Call "handle_ipc" for both data and EOF events
2029
gobject.io_add_watch(parent_pipe.fileno(),
2030
gobject.IO_IN | gobject.IO_HUP,
2031
functools.partial(self.handle_ipc,
2036
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2038
# error, or the other end of multiprocessing.Pipe has closed
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2040
# Wait for other process to exit
2044
# Read a request from the child
2045
request = parent_pipe.recv()
2046
command = request[0]
2048
if command == 'init':
2050
address = request[2]
2052
for c in self.clients.itervalues():
2053
if c.fingerprint == fpr:
2057
logger.info("Client not found for fingerprint: %s, ad"
2058
"dress: %s", fpr, address)
2061
mandos_dbus_service.ClientNotFound(fpr,
2063
parent_pipe.send(False)
2066
gobject.io_add_watch(parent_pipe.fileno(),
2067
gobject.IO_IN | gobject.IO_HUP,
2068
functools.partial(self.handle_ipc,
2074
parent_pipe.send(True)
2075
# remove the old hook in favor of the new above hook on
2078
if command == 'funcall':
2079
funcname = request[1]
2083
parent_pipe.send(('data', getattr(client_object,
2087
if command == 'getattr':
2088
attrname = request[1]
2089
if callable(client_object.__getattribute__(attrname)):
2090
parent_pipe.send(('function',))
2092
parent_pipe.send(('data', client_object
2093
.__getattribute__(attrname)))
2095
if command == 'setattr':
2096
attrname = request[1]
2098
setattr(client_object, attrname, value)
2103
def rfc3339_duration_to_delta(duration):
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2122
# Parsing an RFC 3339 duration with regular expressions is not
2123
# possible - there would have to be multiple places for the same
2124
# values, like seconds. The current code, while more esoteric, is
2125
# cleaner without depending on a parsing library. If Python had a
2126
# built-in library for parsing we would use it, but we'd like to
2127
# avoid excessive use of external libraries.
2129
# New type for defining tokens, syntax, and semantics all-in-one
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2135
"value", # datetime.timedelta or
2137
"followers")) # Tokens valid after
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2142
token_second = Token(re.compile(r"(\d+)S"),
2143
datetime.timedelta(seconds=1),
2144
frozenset((token_end,)))
2145
token_minute = Token(re.compile(r"(\d+)M"),
2146
datetime.timedelta(minutes=1),
2147
frozenset((token_second, token_end)))
2148
token_hour = Token(re.compile(r"(\d+)H"),
2149
datetime.timedelta(hours=1),
2150
frozenset((token_minute, token_end)))
2151
token_time = Token(re.compile(r"T"),
2153
frozenset((token_hour, token_minute,
2155
token_day = Token(re.compile(r"(\d+)D"),
2156
datetime.timedelta(days=1),
2157
frozenset((token_time, token_end)))
2158
token_month = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(weeks=4),
2160
frozenset((token_day, token_end)))
2161
token_year = Token(re.compile(r"(\d+)Y"),
2162
datetime.timedelta(weeks=52),
2163
frozenset((token_month, token_end)))
2164
token_week = Token(re.compile(r"(\d+)W"),
2165
datetime.timedelta(weeks=1),
2166
frozenset((token_end,)))
2167
token_duration = Token(re.compile(r"P"), None,
2168
frozenset((token_year, token_month,
2169
token_day, token_time,
2171
# Define starting values
2172
value = datetime.timedelta() # Value so far
2174
followers = frozenset((token_duration,)) # Following valid tokens
2175
s = duration # String left to parse
2176
# Loop until end token is found
2177
while found_token is not token_end:
2178
# Search for any currently valid tokens
2179
for token in followers:
2180
match = token.regexp.match(s)
2181
if match is not None:
2183
if token.value is not None:
2184
# Value found, parse digits
2185
factor = int(match.group(1), 10)
2186
# Add to value so far
2187
value += factor * token.value
2188
# Strip token from string
2189
s = token.regexp.sub("", s, 1)
2192
# Set valid next tokens
2193
followers = found_token.followers
2196
# No currently valid tokens were found
2197
raise ValueError("Invalid RFC 3339 duration")
2202
575
def string_to_delta(interval):
2203
576
"""Parse a string and return a datetime.timedelta
2205
578
>>> string_to_delta('7d')
2206
579
datetime.timedelta(7)
2207
580
>>> string_to_delta('60s')
2333
720
"debug": "False",
2335
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2336
723
"servicename": "Mandos",
2342
"statedir": "/var/lib/mandos",
2343
"foreground": "False",
2347
726
# Parse config file for server-global settings
2348
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
2349
728
del server_defaults
2350
server_config.read(os.path.join(options.configdir,
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2352
730
# Convert the SafeConfigParser object to a dict
2353
731
server_settings = server_config.defaults()
2354
# Use the appropriate methods on the non-string config options
2355
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2356
server_settings[option] = server_config.getboolean("DEFAULT",
2358
if server_settings["port"]:
2359
server_settings["port"] = server_config.getint("DEFAULT",
2361
if server_settings["socket"]:
2362
server_settings["socket"] = server_config.getint("DEFAULT",
2364
# Later, stdin will, and stdout and stderr might, be dup'ed
2365
# over with an opened os.devnull. But we don't want this to
2366
# happen with a supplied network socket.
2367
if 0 <= server_settings["socket"] <= 2:
2368
server_settings["socket"] = os.dup(server_settings
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
2370
735
del server_config
2372
737
# Override the settings from the config file with command line
2373
738
# options, if set.
2374
739
for option in ("interface", "address", "port", "debug",
2375
"priority", "servicename", "configdir",
2376
"use_dbus", "use_ipv6", "debuglevel", "restore",
2377
"statedir", "socket", "foreground", "zeroconf"):
740
"priority", "servicename", "configdir"):
2378
741
value = getattr(options, option)
2379
742
if value is not None:
2380
743
server_settings[option] = value
2382
# Force all strings to be unicode
2383
for option in server_settings.keys():
2384
if isinstance(server_settings[option], bytes):
2385
server_settings[option] = (server_settings[option]
2387
# Force all boolean options to be boolean
2388
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2389
"foreground", "zeroconf"):
2390
server_settings[option] = bool(server_settings[option])
2391
# Debug implies foreground
2392
if server_settings["debug"]:
2393
server_settings["foreground"] = True
2394
745
# Now we have our good server settings in "server_settings"
2396
##################################################################
2398
if (not server_settings["zeroconf"] and
2399
not (server_settings["port"]
2400
or server_settings["socket"] != "")):
2401
parser.error("Needs port or socket to work without"
2405
747
debug = server_settings["debug"]
2406
debuglevel = server_settings["debuglevel"]
2407
use_dbus = server_settings["use_dbus"]
2408
use_ipv6 = server_settings["use_ipv6"]
2409
stored_state_path = os.path.join(server_settings["statedir"],
2411
foreground = server_settings["foreground"]
2412
zeroconf = server_settings["zeroconf"]
2415
initlogger(debug, logging.DEBUG)
2420
level = getattr(logging, debuglevel.upper())
2421
initlogger(debug, level)
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2423
753
if server_settings["servicename"] != "Mandos":
2424
syslogger.setFormatter(logging.Formatter
2425
('Mandos ({}) [%(process)d]:'
2426
' %(levelname)s: %(message)s'
2427
.format(server_settings
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
757
% server_settings["servicename"]))
2430
759
# Parse config file with clients
2431
client_config = configparser.SafeConfigParser(Client
760
client_defaults = { "timeout": "1h",
762
"checker": "fping -q -- %(host)s",
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2433
766
client_config.read(os.path.join(server_settings["configdir"],
2434
767
"clients.conf"))
2436
global mandos_dbus_service
2437
mandos_dbus_service = None
2440
if server_settings["socket"] != "":
2441
socketfd = server_settings["socket"]
2442
tcp_server = MandosServer((server_settings["address"],
2443
server_settings["port"]),
2445
interface=(server_settings["interface"]
2449
server_settings["priority"],
2453
pidfilename = "/run/mandos.pid"
2454
if not os.path.isdir("/run/."):
2455
pidfilename = "/var/run/mandos.pid"
2458
pidfile = open(pidfilename, "w")
2459
except IOError as e:
2460
logger.error("Could not open file %r", pidfilename,
2463
for name in ("_mandos", "mandos", "nobody"):
2465
uid = pwd.getpwnam(name).pw_uid
2466
gid = pwd.getpwnam(name).pw_gid
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
2476
except OSError as error:
2477
if error.errno != errno.EPERM:
2481
# Enable all possible GnuTLS debugging
2483
# "Use a log level over 10 to enable all debugging options."
2485
gnutls.library.functions.gnutls_global_set_log_level(11)
2487
@gnutls.library.types.gnutls_log_func
2488
def debug_gnutls(level, string):
2489
logger.debug("GnuTLS: %s", string[:-1])
2491
(gnutls.library.functions
2492
.gnutls_global_set_log_function(debug_gnutls))
2494
# Redirect stdin so all checkers get /dev/null
2495
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2496
os.dup2(null, sys.stdin.fileno())
2500
# Need to fork before connecting to D-Bus
2502
# Close all input and output, do double fork, etc.
2505
# multiprocessing will use threads, so before we use gobject we
2506
# need to inform gobject that threads will be used.
2507
gobject.threads_init()
800
except OSError, error:
801
if error[0] != errno.EPERM:
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"])
2509
811
global main_loop
2510
814
# From the Avahi example code
2511
DBusGMainLoop(set_as_default=True)
815
DBusGMainLoop(set_as_default=True )
2512
816
main_loop = gobject.MainLoop()
2513
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
2514
821
# End of Avahi example code
2517
bus_name = dbus.service.BusName("se.recompile.Mandos",
2518
bus, do_not_queue=True)
2519
old_bus_name = (dbus.service.BusName
2520
("se.bsnet.fukt.Mandos", bus,
2522
except dbus.exceptions.NameExistsException as e:
2523
logger.error("Disabling D-Bus:", exc_info=e)
2525
server_settings["use_dbus"] = False
2526
tcp_server.use_dbus = False
2528
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2529
service = AvahiServiceToSyslog(name =
2530
server_settings["servicename"],
2531
servicetype = "_mandos._tcp",
2532
protocol = protocol, bus = bus)
2533
if server_settings["interface"]:
2534
service.interface = (if_nametoindex
2535
(server_settings["interface"]
2538
global multiprocessing_manager
2539
multiprocessing_manager = multiprocessing.Manager()
2541
client_class = Client
2543
client_class = functools.partial(ClientDBus, bus = bus)
2545
client_settings = Client.config_parser(client_config)
2546
old_client_settings = {}
2549
# This is used to redirect stdout and stderr for checker processes
2551
wnull = open(os.devnull, "w") # A writable /dev/null
2552
# Only used if server is running in foreground but not in debug
2554
if debug or not foreground:
2557
# Get client data and settings from last running state.
2558
if server_settings["restore"]:
2560
with open(stored_state_path, "rb") as stored_state:
2561
clients_data, old_client_settings = (pickle.load
2563
os.remove(stored_state_path)
2564
except IOError as e:
2565
if e.errno == errno.ENOENT:
2566
logger.warning("Could not load persistent state: {}"
2567
.format(os.strerror(e.errno)))
2569
logger.critical("Could not load persistent state:",
2572
except EOFError as e:
2573
logger.warning("Could not load persistent state: "
2574
"EOFError:", exc_info=e)
2576
with PGPEngine() as pgp:
2577
for client_name, client in clients_data.items():
2578
# Skip removed clients
2579
if client_name not in client_settings:
2582
# Decide which value to use after restoring saved state.
2583
# We have three different values: Old config file,
2584
# new config file, and saved state.
2585
# New config value takes precedence if it differs from old
2586
# config value, otherwise use saved state.
2587
for name, value in client_settings[client_name].items():
2589
# For each value in new config, check if it
2590
# differs from the old config value (Except for
2591
# the "secret" attribute)
2592
if (name != "secret" and
2593
value != old_client_settings[client_name]
2595
client[name] = value
2599
# Clients who has passed its expire date can still be
2600
# enabled if its last checker was successful. Clients
2601
# whose checker succeeded before we stored its state is
2602
# assumed to have successfully run all checkers during
2604
if client["enabled"]:
2605
if datetime.datetime.utcnow() >= client["expires"]:
2606
if not client["last_checked_ok"]:
2608
"disabling client {} - Client never "
2609
"performed a successful checker"
2610
.format(client_name))
2611
client["enabled"] = False
2612
elif client["last_checker_status"] != 0:
2614
"disabling client {} - Client last"
2615
" checker failed with error code {}"
2616
.format(client_name,
2617
client["last_checker_status"]))
2618
client["enabled"] = False
2620
client["expires"] = (datetime.datetime
2622
+ client["timeout"])
2623
logger.debug("Last checker succeeded,"
2624
" keeping {} enabled"
2625
.format(client_name))
2627
client["secret"] = (
2628
pgp.decrypt(client["encrypted_secret"],
2629
client_settings[client_name]
2632
# If decryption fails, we use secret from new settings
2633
logger.debug("Failed to decrypt {} old secret"
2634
.format(client_name))
2635
client["secret"] = (
2636
client_settings[client_name]["secret"])
2638
# Add/remove clients based on new changes made to config
2639
for client_name in (set(old_client_settings)
2640
- set(client_settings)):
2641
del clients_data[client_name]
2642
for client_name in (set(client_settings)
2643
- set(old_client_settings)):
2644
clients_data[client_name] = client_settings[client_name]
2646
# Create all client objects
2647
for client_name, client in clients_data.items():
2648
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2652
if not tcp_server.clients:
2653
logger.warning("No clients defined")
2656
if pidfile is not None:
2660
pidfile.write("{}\n".format(pid).encode("utf-8"))
2662
logger.error("Could not write to file %r with PID %d",
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)
847
# Close all input and output, do double fork, etc.
852
pidfile.write(str(pid) + "\n")
2667
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
2674
"""A D-Bus proxy object"""
2676
dbus.service.Object.__init__(self, bus, "/")
2677
_interface = "se.recompile.Mandos"
2679
@dbus_interface_annotations(_interface)
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
2685
@dbus.service.signal(_interface, signature="o")
2686
def ClientAdded(self, objpath):
2690
@dbus.service.signal(_interface, signature="ss")
2691
def ClientNotFound(self, fingerprint, address):
2695
@dbus.service.signal(_interface, signature="os")
2696
def ClientRemoved(self, objpath, name):
2700
@dbus.service.method(_interface, out_signature="ao")
2701
def GetAllClients(self):
2703
return dbus.Array(c.dbus_object_path
2705
tcp_server.clients.itervalues())
2707
@dbus.service.method(_interface,
2708
out_signature="a{oa{sv}}")
2709
def GetAllClientsWithProperties(self):
2711
return dbus.Dictionary(
2712
((c.dbus_object_path, c.GetAll(""))
2713
for c in tcp_server.clients.itervalues()),
2716
@dbus.service.method(_interface, in_signature="o")
2717
def RemoveClient(self, object_path):
2719
for c in tcp_server.clients.itervalues():
2720
if c.dbus_object_path == object_path:
2721
del tcp_server.clients[c.name]
2722
c.remove_from_connection()
2723
# Don't signal anything except ClientRemoved
2724
c.disable(quiet=True)
2726
self.ClientRemoved(object_path, c.name)
2728
raise KeyError(object_path)
2732
mandos_dbus_service = MandosDBusService()
856
logger.error(u"Could not write to file %r with PID %d",
859
# "pidfile" was never created
2735
864
"Cleanup function; run on exit"
2739
multiprocessing.active_children()
2741
if not (tcp_server.clients or client_settings):
2744
# Store client before exiting. Secrets are encrypted with key
2745
# based on what config file has. If config file is
2746
# removed/edited, old secret will thus be unrecovable.
2748
with PGPEngine() as pgp:
2749
for client in tcp_server.clients.itervalues():
2750
key = client_settings[client.name]["secret"]
2751
client.encrypted_secret = pgp.encrypt(client.secret,
2755
# A list of attributes that can not be pickled
2757
exclude = { "bus", "changedstate", "secret",
2758
"checker", "server_settings" }
2759
for name, typ in (inspect.getmembers
2760
(dbus.service.Object)):
2763
client_dict["encrypted_secret"] = (client
2765
for attr in client.client_structure:
2766
if attr not in exclude:
2767
client_dict[attr] = getattr(client, attr)
2769
clients[client.name] = client_dict
2770
del client_settings[client.name]["secret"]
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
2779
os.rename(tempname, stored_state_path)
2780
except (IOError, OSError) as e:
2786
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
logger.warning("Could not save persistent state: {}"
2788
.format(os.strerror(e.errno)))
2790
logger.warning("Could not save persistent state:",
2794
# Delete all clients, and settings from config
2795
while tcp_server.clients:
2796
name, client = tcp_server.clients.popitem()
2798
client.remove_from_connection()
2799
# Don't signal anything except ClientRemoved
2800
client.disable(quiet=True)
2803
mandos_dbus_service.ClientRemoved(client
2806
client_settings.clear()
866
# From the Avahi example code
867
if not group is None:
870
# End of Avahi example code
873
client = clients.pop()
874
client.stop_hook = None
2808
877
atexit.register(cleanup)
2810
for client in tcp_server.clients.itervalues():
2813
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2814
# Need to initiate checking of clients
2816
client.init_checker()
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
884
for client in clients:
2818
887
tcp_server.enable()
2819
888
tcp_server.server_activate()
2821
890
# Find out what port we got
2823
service.port = tcp_server.socket.getsockname()[1]
2825
logger.info("Now listening on address %r, port %d,"
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
891
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2832
895
#service.interface = tcp_server.socket.getsockname()[3]
2836
# From the Avahi example code
2839
except dbus.exceptions.DBusException as error:
2840
logger.critical("D-Bus Exception", exc_info=error)
2843
# End of Avahi example code
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
905
# End of Avahi example code
2845
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2846
908
lambda *args, **kwargs:
2847
(tcp_server.handle_request
2848
(*args[2:], **kwargs) or True))
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2850
logger.debug("Starting main loop")
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2852
except AvahiError as error:
2853
logger.critical("Avahi Error", exc_info=error)
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2856
918
except KeyboardInterrupt:
2858
print("", file=sys.stderr)
2859
logger.debug("Server received KeyboardInterrupt")
2860
logger.debug("Server exiting")
2861
# Must run before the D-Bus bus name gets deregistered
2864
922
if __name__ == '__main__':