237
98
class AvahiService(object):
238
"""An Avahi (Zeroconf) service.
241
100
interface: integer; avahi.IF_UNSPEC or an interface index.
242
101
Used to optionally bind to the specified interface.
243
name: string; Example: 'Mandos'
244
type: string; Example: '_mandos._tcp'.
245
See <https://www.iana.org/assignments/service-names-port-numbers>
246
port: integer; what port to announce
247
TXT: list of strings; TXT record for the service
248
domain: string; Domain to publish on, default to .local if empty.
249
host: string; Host to publish records for, default is localhost
250
max_renames: integer; maximum number of renames
251
rename_count: integer; counter so we only rename after collisions
252
a sensible number of times
253
group: D-Bus Entry Group
255
bus: dbus.SystemBus()
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
258
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
259
servicetype = None, port = None, TXT = None,
260
domain = "", host = "", max_renames = 32768,
261
protocol = avahi.PROTO_UNSPEC, bus = None):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
262
118
self.interface = interface
264
self.type = servicetype
266
self.TXT = TXT if TXT is not None else []
267
126
self.domain = domain
269
128
self.rename_count = 0
270
self.max_renames = max_renames
271
self.protocol = protocol
272
self.group = None # our entry group
275
self.entry_group_state_changed_match = None
277
129
def rename(self):
278
130
"""Derived from the Avahi example code"""
279
131
if self.rename_count >= self.max_renames:
280
logger.critical("No suitable Zeroconf service name found"
281
" after %i retries, exiting.",
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
283
134
raise AvahiServiceError("Too many renames")
284
self.name = unicode(self.server
285
.GetAlternativeServiceName(self.name))
286
logger.info("Changing Zeroconf service name to %r ...",
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
291
except dbus.exceptions.DBusException as error:
292
logger.critical("D-Bus Exception", exc_info=error)
295
139
self.rename_count += 1
297
140
def remove(self):
298
141
"""Derived from the Avahi example code"""
299
if self.entry_group_state_changed_match is not None:
300
self.entry_group_state_changed_match.remove()
301
self.entry_group_state_changed_match = None
302
if self.group is not None:
142
if group is not None:
306
145
"""Derived from the Avahi example code"""
308
if self.group is None:
309
self.group = dbus.Interface(
310
self.bus.get_object(avahi.DBUS_NAME,
311
self.server.EntryGroupNew()),
312
avahi.DBUS_INTERFACE_ENTRY_GROUP)
313
self.entry_group_state_changed_match = (
314
self.group.connect_to_signal(
315
'StateChanged', self.entry_group_state_changed))
316
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
317
self.name, self.type)
318
self.group.AddService(
321
dbus.UInt32(0), # flags
322
self.name, self.type,
323
self.domain, self.host,
324
dbus.UInt16(self.port),
325
avahi.string_array_to_txt_array(self.TXT))
328
def entry_group_state_changed(self, state, error):
329
"""Derived from the Avahi example code"""
330
logger.debug("Avahi entry group state change: %i", state)
332
if state == avahi.ENTRY_GROUP_ESTABLISHED:
333
logger.debug("Zeroconf service established.")
334
elif state == avahi.ENTRY_GROUP_COLLISION:
335
logger.info("Zeroconf service name collision.")
337
elif state == avahi.ENTRY_GROUP_FAILURE:
338
logger.critical("Avahi: Error in group state changed %s",
340
raise AvahiGroupError("State changed: {0!s}"
344
"""Derived from the Avahi example code"""
345
if self.group is not None:
348
except (dbus.exceptions.UnknownMethodException,
349
dbus.exceptions.DBusException):
354
def server_state_changed(self, state, error=None):
355
"""Derived from the Avahi example code"""
356
logger.debug("Avahi server state change: %i", state)
357
bad_states = { avahi.SERVER_INVALID:
358
"Zeroconf server invalid",
359
avahi.SERVER_REGISTERING: None,
360
avahi.SERVER_COLLISION:
361
"Zeroconf server name collision",
362
avahi.SERVER_FAILURE:
363
"Zeroconf server failure" }
364
if state in bad_states:
365
if bad_states[state] is not None:
367
logger.error(bad_states[state])
369
logger.error(bad_states[state] + ": %r", error)
371
elif state == avahi.SERVER_RUNNING:
375
logger.debug("Unknown state: %r", state)
377
logger.debug("Unknown state: %r: %r", state, error)
380
"""Derived from the Avahi example code"""
381
if self.server is None:
382
self.server = dbus.Interface(
383
self.bus.get_object(avahi.DBUS_NAME,
384
avahi.DBUS_PATH_SERVER,
385
follow_name_owner_changes=True),
386
avahi.DBUS_INTERFACE_SERVER)
387
self.server.connect_to_signal("StateChanged",
388
self.server_state_changed)
389
self.server_state_changed(self.server.GetState())
392
class AvahiServiceToSyslog(AvahiService):
394
"""Add the new name to the syslog messages"""
395
ret = AvahiService.rename(self)
396
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
403
def timedelta_to_milliseconds(td):
404
"Convert a datetime.timedelta() to milliseconds"
405
return ((td.days * 24 * 60 * 60 * 1000)
406
+ (td.seconds * 1000)
407
+ (td.microseconds // 1000))
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
410
171
class Client(object):
411
172
"""A representation of a client host served by this server.
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
417
checker: subprocess.Popen(); a running checker process used
418
to see if the client lives.
419
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
423
193
runtime with vars(self) as dict, so that for
424
194
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
432
fingerprint: string (40 or 32 hexadecimal digits); used to
433
uniquely identify the client
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
451
server_settings: The server_settings dict from main()
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
462
"checker": "fping -q -- %%(host)s",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
470
def timeout_milliseconds(self):
471
"Return the 'timeout' attribute in milliseconds"
472
return timedelta_to_milliseconds(self.timeout)
474
def extended_timeout_milliseconds(self):
475
"Return the 'extended_timeout' attribute in milliseconds"
476
return timedelta_to_milliseconds(self.extended_timeout)
478
def interval_milliseconds(self):
479
"Return the 'interval' attribute in milliseconds"
480
return timedelta_to_milliseconds(self.interval)
482
def approval_delay_milliseconds(self):
483
return timedelta_to_milliseconds(self.approval_delay)
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
505
client["fingerprint"] = (section["fingerprint"].upper()
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
513
client["secret"] = secfile.read()
515
raise TypeError("No secret or secfile for section {0}"
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
532
def __init__(self, settings, name = None, server_settings=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
209
timeout = property(lambda self: self._timeout,
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
219
+ (self.interval.microseconds
221
interval = property(lambda self: self._interval,
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
534
if server_settings is None:
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
self.secret = secret.decode(u"base64")
240
self.secret = sf.read()
548
self.last_enabled = None
551
logger.debug("Creating client %r", self.name)
552
# Uppercase and remove spaces from fingerprint for later
553
# comparison purposes with return value from the fingerprint()
555
logger.debug(" Fingerprint: %s", self.fingerprint)
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
559
# attributes specific for this server instance
243
raise TypeError(u"No secret or secfile for client %s"
246
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
560
251
self.checker = None
561
252
self.checker_initiator_tag = None
562
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
563
254
self.checker_callback_tag = None
564
self.current_checker_command = None
566
self.approvals_pending = 0
567
self.changedstate = (multiprocessing_manager
568
.Condition(multiprocessing_manager
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
573
self.client_structure.append("client_structure")
575
for name, t in inspect.getmembers(type(self),
579
if not name.startswith("_"):
580
self.client_structure.append(name)
582
# Send notice to process children that client state has changed
583
def send_changedstate(self):
584
with self.changedstate:
585
self.changedstate.notify_all()
255
self.check_command = checker
588
257
"""Start this client's checker and timeout hooks"""
589
if getattr(self, "enabled", False):
592
self.expires = datetime.datetime.utcnow() + self.timeout
594
self.last_enabled = datetime.datetime.utcnow()
596
self.send_changedstate()
598
def disable(self, quiet=True):
599
"""Disable this client."""
600
if not getattr(self, "enabled", False):
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
605
gobject.source_remove(self.disable_initiator_tag)
606
self.disable_initiator_tag = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
609
gobject.source_remove(self.checker_initiator_tag)
610
self.checker_initiator_tag = None
614
self.send_changedstate()
615
# Do not run this again if called by a gobject.timeout_add
621
def init_checker(self):
622
258
# Schedule a new checker to be started an 'interval' from now,
623
259
# and every interval from then on.
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
626
self.checker_initiator_tag = (gobject.timeout_add
627
(self.interval_milliseconds(),
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
self.disable_initiator_tag = (gobject.timeout_add
633
(self.timeout_milliseconds(),
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
635
263
# Also start a new checker *right now*.
636
264
self.start_checker()
638
def checker_callback(self, pid, condition, command):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
275
logger.debug(u"Stopping client %s", self.name)
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
283
gobject.source_remove(self.checker_initiator_tag)
284
self.checker_initiator_tag = None
288
# Do not run this again if called by a gobject.timeout_add
291
self.stop_hook = None
293
def checker_callback(self, pid, condition):
639
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
640
296
self.checker_callback_tag = None
641
297
self.checker = None
642
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
645
logger.info("Checker for %(name)s succeeded",
649
logger.info("Checker for %(name)s failed",
652
self.last_checker_status = -1
653
logger.warning("Checker for %(name)s crashed?",
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
656
def checked_ok(self):
657
"""Assert that the client has been seen, alive and well."""
658
self.last_checked_ok = datetime.datetime.utcnow()
659
self.last_checker_status = 0
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
665
timeout = self.timeout
666
if self.disable_initiator_tag is not None:
667
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
669
if getattr(self, "enabled", False):
670
self.disable_initiator_tag = (gobject.timeout_add
671
(timedelta_to_milliseconds
672
(timeout), self.disable))
673
self.expires = datetime.datetime.utcnow() + timeout
675
def need_approval(self):
676
self.last_approval_request = datetime.datetime.utcnow()
311
logger.debug(u"Checker for %(name)s failed",
678
313
def start_checker(self):
679
314
"""Start a new checker subprocess if one is not running.
681
315
If a checker already exists, leave it running and do
683
317
# The reason for not killing a running checker is that if we
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# a chance to run to completion. If we instead leave running
688
322
# checkers alone, the checker would have to take more time
689
# than 'timeout' for the client to be disabled, which is as it
692
# If a checker exists, make sure it is not a zombie
694
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
except AttributeError:
697
except OSError as error:
698
if error.errno != errno.ECHILD:
702
logger.warning("Checker was a zombie")
703
gobject.source_remove(self.checker_callback_tag)
704
self.checker_callback(pid, status,
705
self.current_checker_command)
706
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
707
325
if self.checker is None:
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
712
self.runtime_expansions)
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
719
self.current_checker_command = command
721
logger.info("Starting checker %r for %s",
723
# We don't need to redirect stdout and stderr, since
724
# in normal mode, that is already done by daemon(),
725
# and in debug mode we don't want to. (Stdin is
726
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
330
# Escape attributes for the shell
331
escaped_attrs = dict((key, re.escape(str(val)))
333
vars(self).iteritems())
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
339
return True # Try again later
341
logger.debug(u"Starting checker %r for %s",
735
343
self.checker = subprocess.Popen(command,
739
except OSError as error:
740
logger.error("Failed to start subprocess",
743
self.checker_callback_tag = (gobject.child_watch_add
745
self.checker_callback,
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
750
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
751
except OSError as error:
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
346
self.checker_callback_tag = gobject.child_watch_add\
348
self.checker_callback)
349
except subprocess.OSError, error:
350
logger.error(u"Failed to start subprocess: %s",
761
352
# Re-run this periodically if run by gobject.timeout_add
764
354
def stop_checker(self):
765
355
"""Force the checker process, if any, to stop."""
766
356
if self.checker_callback_tag:
771
361
logger.debug("Stopping checker for %(name)s", vars(self))
773
self.checker.terminate()
363
os.kill(self.checker.pid, signal.SIGTERM)
775
365
#if self.checker.poll() is None:
776
# self.checker.kill()
777
except OSError as error:
366
# os.kill(self.checker.pid, signal.SIGKILL)
367
except OSError, error:
778
368
if error.errno != errno.ESRCH: # No such process
780
370
self.checker = None
783
def dbus_service_property(dbus_interface, signature="v",
784
access="readwrite", byte_arrays=False):
785
"""Decorators for marking methods of a DBusObjectWithProperties to
786
become properties on the D-Bus.
788
The decorated method will be called with no arguments by "Get"
789
and with one argument by "Set".
791
The parameters, where they are supported, are the same as
792
dbus.service.method, except there is only "signature", since the
793
type from Get() and the type sent to Set() is the same.
795
# Encoding deeply encoded byte arrays is not supported yet by the
796
# "Set" method, so we fail early here:
797
if byte_arrays and signature != "ay":
798
raise ValueError("Byte arrays not supported for non-'ay'"
799
" signature {0!r}".format(signature))
801
func._dbus_is_property = True
802
func._dbus_interface = dbus_interface
803
func._dbus_signature = signature
804
func._dbus_access = access
805
func._dbus_name = func.__name__
806
if func._dbus_name.endswith("_dbus_property"):
807
func._dbus_name = func._dbus_name[:-14]
808
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
836
@dbus_service_property("org.example.Interface", signature="b",
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
845
func._dbus_annotations = annotations
850
class DBusPropertyException(dbus.exceptions.DBusException):
851
"""A base class for D-Bus property-related exceptions
853
def __unicode__(self):
854
return unicode(str(self))
857
class DBusPropertyAccessException(DBusPropertyException):
858
"""A property's access permissions disallows an operation.
863
class DBusPropertyNotFound(DBusPropertyException):
864
"""An attempt was made to access a non-existing property.
869
class DBusObjectWithProperties(dbus.service.Object):
870
"""A D-Bus object with properties.
872
Classes inheriting from this can use the dbus_service_property
873
decorator to expose methods as D-Bus properties. It exposes the
874
standard Get(), Set(), and GetAll() methods on the D-Bus.
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
887
def _get_all_dbus_things(self, thing):
888
"""Returns a generator of (name, attribute) pairs
890
return ((getattr(athing.__get__(self), "_dbus_name",
892
athing.__get__(self))
893
for cls in self.__class__.__mro__
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
898
def _get_dbus_property(self, interface_name, property_name):
899
"""Returns a bound method if one exists which is a D-Bus
900
property with the specified name and interface.
902
for cls in self.__class__.__mro__:
903
for name, value in (inspect.getmembers
905
self._is_dbus_thing("property"))):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
911
raise DBusPropertyNotFound(self.dbus_object_path + ":"
912
+ interface_name + "."
915
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
924
if not hasattr(value, "variant_level"):
926
return type(value)(value, variant_level=value.variant_level+1)
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {0!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
946
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
947
out_signature="a{sv}")
948
def GetAll(self, interface_name):
949
"""Standard D-Bus property GetAll() method, see D-Bus
952
Note: Will not include properties with access="write".
955
for name, prop in self._get_all_dbus_things("property"):
957
and interface_name != prop._dbus_interface):
958
# Interface non-empty but did not match
960
# Ignore write-only properties
961
if prop._dbus_access == "write":
964
if not hasattr(value, "variant_level"):
965
properties[name] = value
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
return dbus.Dictionary(properties, signature="sv")
971
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
973
path_keyword='object_path',
974
connection_keyword='connection')
975
def Introspect(self, object_path, connection):
976
"""Overloading of standard D-Bus method.
978
Inserts property tags and interface annotation tags.
980
xmlstring = dbus.service.Object.Introspect(self, object_path,
983
document = xml.dom.minidom.parseString(xmlstring)
984
def make_tag(document, name, prop):
985
e = document.createElement("property")
986
e.setAttribute("name", name)
987
e.setAttribute("type", prop._dbus_signature)
988
e.setAttribute("access", prop._dbus_access)
990
for if_tag in document.getElementsByTagName("interface"):
992
for tag in (make_tag(document, name, prop)
994
in self._get_all_dbus_things("property")
995
if prop._dbus_interface
996
== if_tag.getAttribute("name")):
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1009
"_dbus_annotations",
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
1029
# Add the names to the return values for the
1030
# "org.freedesktop.DBus.Properties" methods
1031
if (if_tag.getAttribute("name")
1032
== "org.freedesktop.DBus.Properties"):
1033
for cn in if_tag.getElementsByTagName("method"):
1034
if cn.getAttribute("name") == "Get":
1035
for arg in cn.getElementsByTagName("arg"):
1036
if (arg.getAttribute("direction")
1038
arg.setAttribute("name", "value")
1039
elif cn.getAttribute("name") == "GetAll":
1040
for arg in cn.getElementsByTagName("arg"):
1041
if (arg.getAttribute("direction")
1043
arg.setAttribute("name", "props")
1044
xmlstring = document.toxml("utf-8")
1046
except (AttributeError, xml.dom.DOMException,
1047
xml.parsers.expat.ExpatError) as error:
1048
logger.error("Failed to override Introspection method",
1053
def datetime_to_dbus(dt, variant_level=0):
1054
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1056
return dbus.String("", variant_level = variant_level)
1057
return dbus.String(dt.isoformat(),
1058
variant_level=variant_level)
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
1091
# Ignore non-D-Bus attributes, and D-Bus attributes
1092
# with the wrong interface name
1093
if (not hasattr(attribute, "_dbus_interface")
1094
or not attribute._dbus_interface
1095
.startswith(orig_interface_name)):
1097
# Create an alternate D-Bus interface name based on
1099
alt_interface = (attribute._dbus_interface
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
1103
# Is this a D-Bus signal?
1104
if getattr(attribute, "_dbus_is_signal", False):
1105
# Extract the original non-method undecorated
1106
# function by black magic
1107
nonmethod_func = (dict(
1108
zip(attribute.func_code.co_freevars,
1109
attribute.__closure__))["func"]
1111
# Create a new, but exactly alike, function
1112
# object, and decorate it to be a new D-Bus signal
1113
# with the alternate D-Bus interface name
1114
new_function = (dbus.service.signal
1116
attribute._dbus_signature)
1117
(types.FunctionType(
1118
nonmethod_func.func_code,
1119
nonmethod_func.func_globals,
1120
nonmethod_func.func_name,
1121
nonmethod_func.func_defaults,
1122
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1129
# Define a creator of a function to call both the
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
1133
def fixscope(func1, func2):
1134
"""This function is a scope container to pass
1135
func1 and func2 to the "call_both" function
1136
outside of its arguments"""
1137
def call_both(*args, **kwargs):
1138
"""This function will emit two D-Bus
1139
signals by calling func1 and func2"""
1140
func1(*args, **kwargs)
1141
func2(*args, **kwargs)
1143
# Create the "call_both" function and add it to
1145
attr[attrname] = fixscope(attribute, new_function)
1146
# Is this a D-Bus method?
1147
elif getattr(attribute, "_dbus_is_method", False):
1148
# Create a new, but exactly alike, function
1149
# object. Decorate it to be a new D-Bus method
1150
# with the alternate D-Bus interface name. Add it
1152
attr[attrname] = (dbus.service.method
1154
attribute._dbus_in_signature,
1155
attribute._dbus_out_signature)
1157
(attribute.func_code,
1158
attribute.func_globals,
1159
attribute.func_name,
1160
attribute.func_defaults,
1161
attribute.func_closure)))
1162
# Copy annotations, if any
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1168
# Is this a D-Bus property?
1169
elif getattr(attribute, "_dbus_is_property", False):
1170
# Create a new, but exactly alike, function
1171
# object, and decorate it to be a new D-Bus
1172
# property with the alternate D-Bus interface
1173
# name. Add it to the class.
1174
attr[attrname] = (dbus_service_property
1176
attribute._dbus_signature,
1177
attribute._dbus_access,
1179
._dbus_get_args_options
1182
(attribute.func_code,
1183
attribute.func_globals,
1184
attribute.func_name,
1185
attribute.func_defaults,
1186
attribute.func_closure)))
1187
# Copy annotations, if any
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1199
attr[attrname] = (dbus_interface_annotations
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1213
return { "org.freedesktop.DBus.Deprecated":
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
1232
class ClientDBus(Client, DBusObjectWithProperties):
1233
"""A Client class using D-Bus
1236
dbus_object_path: dbus.ObjectPath
1237
bus: dbus.SystemBus()
1240
runtime_expansions = (Client.runtime_expansions
1241
+ ("dbus_object_path",))
1243
# dbus.service.Object doesn't use super(), so we can't either.
1245
def __init__(self, bus = None, *args, **kwargs):
1247
Client.__init__(self, *args, **kwargs)
1248
# Only now, when this client is initialized, can it show up on
1250
client_object_name = unicode(self.name).translate(
1251
{ord("."): ord("_"),
1252
ord("-"): ord("_")})
1253
self.dbus_object_path = (dbus.ObjectPath
1254
("/clients/" + client_object_name))
1255
DBusObjectWithProperties.__init__(self, self.bus,
1256
self.dbus_object_path)
1258
def notifychangeproperty(transform_func,
1259
dbus_name, type_func=lambda x: x,
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
1267
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
1271
attrname = "_{0}".format(dbus_name)
1272
def setter(self, value):
1273
if hasattr(self, "dbus_object_path"):
1274
if (not hasattr(self, attrname) or
1275
type_func(getattr(self, attrname, None))
1276
!= type_func(value)):
1277
dbus_value = transform_func(type_func(value),
1280
self.PropertyChanged(dbus.String(dbus_name),
1282
setattr(self, attrname, value)
1284
return property(lambda self: getattr(self, attrname), setter)
1286
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
approvals_pending = notifychangeproperty(dbus.Boolean,
1290
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
last_enabled = notifychangeproperty(datetime_to_dbus,
1293
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
type_func = lambda checker:
1295
checker is not None)
1296
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
1300
last_approval_request = notifychangeproperty(
1301
datetime_to_dbus, "LastApprovalRequest")
1302
approved_by_default = notifychangeproperty(dbus.Boolean,
1303
"ApprovedByDefault")
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1307
timedelta_to_milliseconds)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1314
timedelta_to_milliseconds)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1321
timedelta_to_milliseconds)
1322
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
del notifychangeproperty
1326
def __del__(self, *args, **kwargs):
1328
self.remove_from_connection()
1331
if hasattr(DBusObjectWithProperties, "__del__"):
1332
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1333
Client.__del__(self, *args, **kwargs)
1335
def checker_callback(self, pid, condition, command,
1337
self.checker_callback_tag = None
1339
if os.WIFEXITED(condition):
1340
exitstatus = os.WEXITSTATUS(condition)
1342
self.CheckerCompleted(dbus.Int16(exitstatus),
1343
dbus.Int64(condition),
1344
dbus.String(command))
1347
self.CheckerCompleted(dbus.Int16(-1),
1348
dbus.Int64(condition),
1349
dbus.String(command))
1351
return Client.checker_callback(self, pid, condition, command,
1354
def start_checker(self, *args, **kwargs):
1355
old_checker = self.checker
1356
if self.checker is not None:
1357
old_checker_pid = self.checker.pid
1359
old_checker_pid = None
1360
r = Client.start_checker(self, *args, **kwargs)
1361
# Only if new checker process was started
1362
if (self.checker is not None
1363
and old_checker_pid != self.checker.pid):
1365
self.CheckerStarted(self.current_checker_command)
1368
def _reset_approved(self):
1369
self.approved = None
1372
def approve(self, value=True):
1373
self.approved = value
1374
gobject.timeout_add(timedelta_to_milliseconds
1375
(self.approval_duration),
1376
self._reset_approved)
1377
self.send_changedstate()
1379
## D-Bus methods, signals & properties
1380
_interface = "se.recompile.Mandos.Client"
1384
@dbus_interface_annotations(_interface)
1386
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1391
# CheckerCompleted - signal
1392
@dbus.service.signal(_interface, signature="nxs")
1393
def CheckerCompleted(self, exitcode, waitstatus, command):
1397
# CheckerStarted - signal
1398
@dbus.service.signal(_interface, signature="s")
1399
def CheckerStarted(self, command):
1403
# PropertyChanged - signal
1404
@dbus.service.signal(_interface, signature="sv")
1405
def PropertyChanged(self, property, value):
1409
# GotSecret - signal
1410
@dbus.service.signal(_interface)
1411
def GotSecret(self):
1413
Is sent after a successful transfer of secret from the Mandos
1414
server to mandos-client
1419
@dbus.service.signal(_interface, signature="s")
1420
def Rejected(self, reason):
1424
# NeedApproval - signal
1425
@dbus.service.signal(_interface, signature="tb")
1426
def NeedApproval(self, timeout, default):
1428
return self.need_approval()
1433
@dbus.service.method(_interface, in_signature="b")
1434
def Approve(self, value):
1437
# CheckedOK - method
1438
@dbus.service.method(_interface)
1439
def CheckedOK(self):
1443
@dbus.service.method(_interface)
1448
# StartChecker - method
1449
@dbus.service.method(_interface)
1450
def StartChecker(self):
1452
self.start_checker()
1455
@dbus.service.method(_interface)
1460
# StopChecker - method
1461
@dbus.service.method(_interface)
1462
def StopChecker(self):
1467
# ApprovalPending - property
1468
@dbus_service_property(_interface, signature="b", access="read")
1469
def ApprovalPending_dbus_property(self):
1470
return dbus.Boolean(bool(self.approvals_pending))
1472
# ApprovedByDefault - property
1473
@dbus_service_property(_interface, signature="b",
1475
def ApprovedByDefault_dbus_property(self, value=None):
1476
if value is None: # get
1477
return dbus.Boolean(self.approved_by_default)
1478
self.approved_by_default = bool(value)
1480
# ApprovalDelay - property
1481
@dbus_service_property(_interface, signature="t",
1483
def ApprovalDelay_dbus_property(self, value=None):
1484
if value is None: # get
1485
return dbus.UInt64(self.approval_delay_milliseconds())
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(timedelta_to_milliseconds(
1494
self.approval_duration))
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1508
@dbus_service_property(_interface, signature="s",
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = unicode(value)
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1543
return datetime_to_dbus(self.last_checked_ok)
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout_milliseconds())
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1577
if (getattr(self, "disable_initiator_tag", None)
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
timedelta_to_milliseconds(self.expires - now),
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout_milliseconds())
1592
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1594
# Interval - property
1595
@dbus_service_property(_interface, signature="t",
1597
def Interval_dbus_property(self, value=None):
1598
if value is None: # get
1599
return dbus.UInt64(self.interval_milliseconds())
1600
self.interval = datetime.timedelta(0, 0, 0, value)
1601
if getattr(self, "checker_initiator_tag", None) is None:
1604
# Reschedule checker run
1605
gobject.source_remove(self.checker_initiator_tag)
1606
self.checker_initiator_tag = (gobject.timeout_add
1607
(value, self.start_checker))
1608
self.start_checker() # Start one now, too
1610
# Checker - property
1611
@dbus_service_property(_interface, signature="s",
1613
def Checker_dbus_property(self, value=None):
1614
if value is None: # get
1615
return dbus.String(self.checker_command)
1616
self.checker_command = unicode(value)
1618
# CheckerRunning - property
1619
@dbus_service_property(_interface, signature="b",
1621
def CheckerRunning_dbus_property(self, value=None):
1622
if value is None: # get
1623
return dbus.Boolean(self.checker is not None)
1625
self.start_checker()
1629
# ObjectPath - property
1630
@dbus_service_property(_interface, signature="o", access="read")
1631
def ObjectPath_dbus_property(self):
1632
return self.dbus_object_path # is already a dbus.ObjectPath
1635
@dbus_service_property(_interface, signature="ay",
1636
access="write", byte_arrays=True)
1637
def Secret_dbus_property(self, value):
1638
self.secret = str(value)
1643
class ProxyClient(object):
1644
def __init__(self, child_pipe, fpr, address):
1645
self._pipe = child_pipe
1646
self._pipe.send(('init', fpr, address))
1647
if not self._pipe.recv():
1650
def __getattribute__(self, name):
1652
return super(ProxyClient, self).__getattribute__(name)
1653
self._pipe.send(('getattr', name))
1654
data = self._pipe.recv()
1655
if data[0] == 'data':
1657
if data[0] == 'function':
1658
def func(*args, **kwargs):
1659
self._pipe.send(('funcall', name, args, kwargs))
1660
return self._pipe.recv()[1]
1663
def __setattr__(self, name, value):
1665
return super(ProxyClient, self).__setattr__(name, value)
1666
self._pipe.send(('setattr', name, value))
1669
class ClientHandler(socketserver.BaseRequestHandler, object):
1670
"""A class to handle client connections.
1672
Instantiated once for each connection to handle it.
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
375
return now < (self.created + self.timeout)
377
return now < (self.last_checked_ok + self.timeout)
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
394
return ctypes.string_at(cert.data, cert.size)
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
1673
431
Note: This will run in its own forked process."""
1675
433
def handle(self):
1676
with contextlib.closing(self.server.child_pipe) as child_pipe:
1677
logger.info("TCP connection from: %s",
1678
unicode(self.client_address))
1679
logger.debug("Pipe FD: %d",
1680
self.server.child_pipe.fileno())
1682
session = (gnutls.connection
1683
.ClientSession(self.request,
1685
.X509Credentials()))
1687
# Note: gnutls.connection.X509Credentials is really a
1688
# generic GnuTLS certificate credentials object so long as
1689
# no X.509 keys are added to it. Therefore, we can use it
1690
# here despite using OpenPGP certificates.
1692
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1693
# "+AES-256-CBC", "+SHA1",
1694
# "+COMP-NULL", "+CTYPE-OPENPGP",
1696
# Use a fallback default, since this MUST be set.
1697
priority = self.server.gnutls_priority
1698
if priority is None:
1700
(gnutls.library.functions
1701
.gnutls_priority_set_direct(session._c_object,
1704
# Start communication using the Mandos protocol
1705
# Get protocol number
1706
line = self.request.makefile().readline()
1707
logger.debug("Protocol version: %r", line)
1709
if int(line.strip().split()[0]) > 1:
1710
raise RuntimeError(line)
1711
except (ValueError, IndexError, RuntimeError) as error:
1712
logger.error("Unknown protocol version: %s", error)
1715
# Start GnuTLS connection
1718
except gnutls.errors.GNUTLSError as error:
1719
logger.warning("Handshake failed: %s", error)
1720
# Do not run session.bye() here: the session is not
1721
# established. Just abandon the request.
1723
logger.debug("Handshake succeeded")
1725
approval_required = False
1728
fpr = self.fingerprint(self.peer_certificate
1731
gnutls.errors.GNUTLSError) as error:
1732
logger.warning("Bad certificate: %s", error)
1734
logger.debug("Fingerprint: %s", fpr)
1737
client = ProxyClient(child_pipe, fpr,
1738
self.client_address)
1742
if client.approval_delay:
1743
delay = client.approval_delay
1744
client.approvals_pending += 1
1745
approval_required = True
1748
if not client.enabled:
1749
logger.info("Client %s is disabled",
1751
if self.server.use_dbus:
1753
client.Rejected("Disabled")
1756
if client.approved or not client.approval_delay:
1757
#We are approved or approval is disabled
1759
elif client.approved is None:
1760
logger.info("Client %s needs approval",
1762
if self.server.use_dbus:
1764
client.NeedApproval(
1765
client.approval_delay_milliseconds(),
1766
client.approved_by_default)
1768
logger.warning("Client %s was not approved",
1770
if self.server.use_dbus:
1772
client.Rejected("Denied")
1775
#wait until timeout or approved
1776
time = datetime.datetime.now()
1777
client.changedstate.acquire()
1778
client.changedstate.wait(
1779
float(timedelta_to_milliseconds(delay)
1781
client.changedstate.release()
1782
time2 = datetime.datetime.now()
1783
if (time2 - time) >= delay:
1784
if not client.approved_by_default:
1785
logger.warning("Client %s timed out while"
1786
" waiting for approval",
1788
if self.server.use_dbus:
1790
client.Rejected("Approval timed out")
1795
delay -= time2 - time
1798
while sent_size < len(client.secret):
1800
sent = session.send(client.secret[sent_size:])
1801
except gnutls.errors.GNUTLSError as error:
1802
logger.warning("gnutls send failed",
1805
logger.debug("Sent: %d, remaining: %d",
1806
sent, len(client.secret)
1807
- (sent_size + sent))
1810
logger.info("Sending secret to %s", client.name)
1811
# bump the timeout using extended_timeout
1812
client.bump_timeout(client.extended_timeout)
1813
if self.server.use_dbus:
1818
if approval_required:
1819
client.approvals_pending -= 1
1822
except gnutls.errors.GNUTLSError as error:
1823
logger.warning("GnuTLS bye failed",
1827
def peer_certificate(session):
1828
"Return the peer's OpenPGP certificate as a bytestring"
1829
# If not an OpenPGP certificate...
1830
if (gnutls.library.functions
1831
.gnutls_certificate_type_get(session._c_object)
1832
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1833
# ...do the normal thing
1834
return session.peer_certificate
1835
list_size = ctypes.c_uint(1)
1836
cert_list = (gnutls.library.functions
1837
.gnutls_certificate_get_peers
1838
(session._c_object, ctypes.byref(list_size)))
1839
if not bool(cert_list) and list_size.value != 0:
1840
raise gnutls.errors.GNUTLSError("error getting peer"
1842
if list_size.value == 0:
1845
return ctypes.string_at(cert.data, cert.size)
1848
def fingerprint(openpgp):
1849
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1850
# New GnuTLS "datum" with the OpenPGP public key
1851
datum = (gnutls.library.types
1852
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1855
ctypes.c_uint(len(openpgp))))
1856
# New empty GnuTLS certificate
1857
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1858
(gnutls.library.functions
1859
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1860
# Import the OpenPGP public key into the certificate
1861
(gnutls.library.functions
1862
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1863
gnutls.library.constants
1864
.GNUTLS_OPENPGP_FMT_RAW))
1865
# Verify the self signature in the key
1866
crtverify = ctypes.c_uint()
1867
(gnutls.library.functions
1868
.gnutls_openpgp_crt_verify_self(crt, 0,
1869
ctypes.byref(crtverify)))
1870
if crtverify.value != 0:
1871
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1872
raise (gnutls.errors.CertificateSecurityError
1874
# New buffer for the fingerprint
1875
buf = ctypes.create_string_buffer(20)
1876
buf_len = ctypes.c_size_t()
1877
# Get the fingerprint from the certificate into the buffer
1878
(gnutls.library.functions
1879
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1880
ctypes.byref(buf_len)))
1881
# Deinit the certificate
1882
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1883
# Convert the buffer to a Python bytestring
1884
fpr = ctypes.string_at(buf, buf_len.value)
1885
# Convert the bytestring to hexadecimal notation
1886
hex_fpr = binascii.hexlify(fpr).upper()
1890
class MultiprocessingMixIn(object):
1891
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1892
def sub_process_main(self, request, address):
1894
self.finish_request(request, address)
1896
self.handle_error(request, address)
1897
self.close_request(request)
1899
def process_request(self, request, address):
1900
"""Start a new process to process the request."""
1901
proc = multiprocessing.Process(target = self.sub_process_main,
1902
args = (request, address))
1907
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1908
""" adds a pipe to the MixIn """
1909
def process_request(self, request, client_address):
1910
"""Overrides and wraps the original process_request().
1912
This function creates a new pipe in self.pipe
1914
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1916
proc = MultiprocessingMixIn.process_request(self, request,
1918
self.child_pipe.close()
1919
self.add_pipe(parent_pipe, proc)
1921
def add_pipe(self, parent_pipe, proc):
1922
"""Dummy function; override as necessary"""
1923
raise NotImplementedError()
1926
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1927
socketserver.TCPServer, object):
1928
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
440
if int(line.strip().split()[0]) > 1:
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
456
priority = "NORMAL" # Fallback default, since this
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
460
gnutls.library.functions.gnutls_priority_set_direct\
461
(session._c_object, priority, None);
465
except gnutls.errors.GNUTLSError, error:
466
logger.debug(u"Handshake failed: %s", error)
467
# Do not run session.bye() here: the session is not
468
# established. Just abandon the request.
471
fpr = fingerprint(peer_certificate(session))
472
except (TypeError, gnutls.errors.GNUTLSError), error:
473
logger.debug(u"Bad certificate: %s", error)
476
logger.debug(u"Fingerprint: %s", fpr)
478
for c in self.server.clients:
479
if c.fingerprint == fpr:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
486
# Have to check if client.still_valid(), since it is possible
487
# that the client timed out while establishing the GnuTLS
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1931
enabled: Boolean; whether this server is activated yet
1932
interface: None or a network interface name (string)
1933
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1935
def __init__(self, server_address, RequestHandlerClass,
1936
interface=None, use_ipv6=True, socketfd=None):
1937
"""If socketfd is set, use that file descriptor instead of
1938
creating a new one with socket.socket().
1940
self.interface = interface
1942
self.address_family = socket.AF_INET6
1943
if socketfd is not None:
1944
# Save the file descriptor
1945
self.socketfd = socketfd
1946
# Save the original socket.socket() function
1947
self.socket_socket = socket.socket
1948
# To implement --socket, we monkey patch socket.socket.
1950
# (When socketserver.TCPServer is a new-style class, we
1951
# could make self.socket into a property instead of monkey
1952
# patching socket.socket.)
1954
# Create a one-time-only replacement for socket.socket()
1955
@functools.wraps(socket.socket)
1956
def socket_wrapper(*args, **kwargs):
1957
# Restore original function so subsequent calls are
1959
socket.socket = self.socket_socket
1960
del self.socket_socket
1961
# This time only, return a new socket object from the
1962
# saved file descriptor.
1963
return socket.fromfd(self.socketfd, *args, **kwargs)
1964
# Replace socket.socket() function with wrapper
1965
socket.socket = socket_wrapper
1966
# The socketserver.TCPServer.__init__ will call
1967
# socket.socket(), which might be our replacement,
1968
# socket_wrapper(), if socketfd was set.
1969
socketserver.TCPServer.__init__(self, server_address,
1970
RequestHandlerClass)
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1972
518
def server_bind(self):
1973
519
"""This overrides the normal server_bind() function
1974
520
to bind to an interface if one was specified, and also NOT to
1975
521
bind to an address or port if they were not specified."""
1976
if self.interface is not None:
1977
if SO_BINDTODEVICE is None:
1978
logger.error("SO_BINDTODEVICE does not exist;"
1979
" cannot bind to interface %s",
1983
self.socket.setsockopt(socket.SOL_SOCKET,
1985
str(self.interface + '\0'))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
526
self.socket.setsockopt(socket.SOL_SOCKET,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.warning(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
1999
536
# Only bind(2) the socket if we really need to.
2000
537
if self.server_address[0] or self.server_address[1]:
2001
538
if not self.server_address[0]:
2002
if self.address_family == socket.AF_INET6:
2003
any_address = "::" # in6addr_any
2005
any_address = "0.0.0.0" # INADDR_ANY
2006
self.server_address = (any_address,
540
self.server_address = (in6addr_any,
2007
541
self.server_address[1])
2008
elif not self.server_address[1]:
542
elif self.server_address[1] is None:
2009
543
self.server_address = (self.server_address[0],
2011
# if self.interface:
2012
# self.server_address = (self.server_address[0],
2017
return socketserver.TCPServer.server_bind(self)
2020
class MandosServer(IPv6_TCPServer):
2024
clients: set of Client objects
2025
gnutls_priority GnuTLS priority string
2026
use_dbus: Boolean; to emit D-Bus signals or not
2028
Assumes a gobject.MainLoop event loop.
2030
def __init__(self, server_address, RequestHandlerClass,
2031
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
2033
self.enabled = False
2034
self.clients = clients
2035
if self.clients is None:
2037
self.use_dbus = use_dbus
2038
self.gnutls_priority = gnutls_priority
2039
IPv6_TCPServer.__init__(self, server_address,
2040
RequestHandlerClass,
2041
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
2044
def server_activate(self):
2046
return socketserver.TCPServer.server_activate(self)
2051
def add_pipe(self, parent_pipe, proc):
2052
# Call "handle_ipc" for both data and EOF events
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2072
if command == 'init':
2074
address = request[2]
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2085
mandos_dbus_service.ClientNotFound(fpr,
2087
parent_pipe.send(False)
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2102
if command == 'funcall':
2103
funcname = request[1]
2107
parent_pipe.send(('data', getattr(client_object,
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2119
if command == 'setattr':
2120
attrname = request[1]
2122
setattr(client_object, attrname, value)
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2159
"value", # datetime.timedelta or
2161
"followers")) # Tokens valid after
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2177
frozenset((token_hour, token_minute,
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2198
followers = frozenset(token_duration,) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2216
# Set valid next tokens
2217
followers = found_token.followers
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
545
return super(type(self), self).server_bind()
2226
548
def string_to_delta(interval):
2227
549
"""Parse a string and return a datetime.timedelta
2229
551
>>> string_to_delta('7d')
2230
552
datetime.timedelta(7)
2231
553
>>> string_to_delta('60s')
2355
695
"debug": "False",
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
697
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2358
698
"servicename": "Mandos",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
2368
701
# Parse config file for server-global settings
2369
server_config = configparser.SafeConfigParser(server_defaults)
702
server_config = ConfigParser.SafeConfigParser(server_defaults)
2370
703
del server_defaults
2371
server_config.read(os.path.join(options.configdir,
704
server_config.read(os.path.join(options.configdir, "server.conf"))
705
server_section = "server"
2373
706
# Convert the SafeConfigParser object to a dict
2374
server_settings = server_config.defaults()
2375
# Use the appropriate methods on the non-string config options
2376
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2377
server_settings[option] = server_config.getboolean("DEFAULT",
2379
if server_settings["port"]:
2380
server_settings["port"] = server_config.getint("DEFAULT",
2382
if server_settings["socket"]:
2383
server_settings["socket"] = server_config.getint("DEFAULT",
2385
# Later, stdin will, and stdout and stderr might, be dup'ed
2386
# over with an opened os.devnull. But we don't want this to
2387
# happen with a supplied network socket.
2388
if 0 <= server_settings["socket"] <= 2:
2389
server_settings["socket"] = os.dup(server_settings
707
server_settings = dict(server_config.items(server_section))
708
# Use getboolean on the boolean config option
709
server_settings["debug"] = server_config.getboolean\
710
(server_section, "debug")
2391
711
del server_config
2393
713
# Override the settings from the config file with command line
2394
714
# options, if set.
2395
715
for option in ("interface", "address", "port", "debug",
2396
"priority", "servicename", "configdir",
2397
"use_dbus", "use_ipv6", "debuglevel", "restore",
2398
"statedir", "socket", "foreground"):
716
"priority", "servicename", "configdir"):
2399
717
value = getattr(options, option)
2400
718
if value is not None:
2401
719
server_settings[option] = value
2403
# Force all strings to be unicode
2404
for option in server_settings.keys():
2405
if type(server_settings[option]) is str:
2406
server_settings[option] = unicode(server_settings[option])
2407
# Force all boolean options to be boolean
2408
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
server_settings[option] = bool(server_settings[option])
2411
# Debug implies foreground
2412
if server_settings["debug"]:
2413
server_settings["foreground"] = True
2414
721
# Now we have our good server settings in "server_settings"
2416
##################################################################
2419
debug = server_settings["debug"]
2420
debuglevel = server_settings["debuglevel"]
2421
use_dbus = server_settings["use_dbus"]
2422
use_ipv6 = server_settings["use_ipv6"]
2423
stored_state_path = os.path.join(server_settings["statedir"],
2425
foreground = server_settings["foreground"]
2428
initlogger(debug, logging.DEBUG)
2433
level = getattr(logging, debuglevel.upper())
2434
initlogger(debug, level)
2436
if server_settings["servicename"] != "Mandos":
2437
syslogger.setFormatter(logging.Formatter
2438
('Mandos ({0}) [%(process)d]:'
2439
' %(levelname)s: %(message)s'
2440
.format(server_settings
2443
723
# Parse config file with clients
2444
client_config = configparser.SafeConfigParser(Client
724
client_defaults = { "timeout": "1h",
726
"checker": "fping -q -- %%(fqdn)s",
728
client_config = ConfigParser.SafeConfigParser(client_defaults)
2446
729
client_config.read(os.path.join(server_settings["configdir"],
2447
730
"clients.conf"))
2449
global mandos_dbus_service
2450
mandos_dbus_service = None
2452
tcp_server = MandosServer((server_settings["address"],
2453
server_settings["port"]),
2455
interface=(server_settings["interface"]
2459
server_settings["priority"],
2461
socketfd=(server_settings["socket"]
2464
pidfilename = "/run/mandos.pid"
2465
if not os.path.isdir("/run/."):
2466
pidfilename = "/var/run/mandos.pid"
2469
pidfile = open(pidfilename, "w")
2470
except IOError as e:
2471
logger.error("Could not open file %r", pidfilename,
2474
for name in ("_mandos", "mandos", "nobody"):
2476
uid = pwd.getpwnam(name).pw_uid
2477
gid = pwd.getpwnam(name).pw_gid
2487
except OSError as error:
2488
if error.errno != errno.EPERM:
2492
# Enable all possible GnuTLS debugging
2494
# "Use a log level over 10 to enable all debugging options."
2496
gnutls.library.functions.gnutls_global_set_log_level(11)
2498
@gnutls.library.types.gnutls_log_func
2499
def debug_gnutls(level, string):
2500
logger.debug("GnuTLS: %s", string[:-1])
2502
(gnutls.library.functions
2503
.gnutls_global_set_log_function(debug_gnutls))
2505
# Redirect stdin so all checkers get /dev/null
2506
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2507
os.dup2(null, sys.stdin.fileno())
2511
# Need to fork before connecting to D-Bus
2513
# Close all input and output, do double fork, etc.
2516
# multiprocessing will use threads, so before we use gobject we
2517
# need to inform gobject that threads will be used.
2518
gobject.threads_init()
733
service = AvahiService(name = server_settings["servicename"],
734
type = "_mandos._tcp", );
735
if server_settings["interface"]:
736
service.interface = if_nametoindex(server_settings["interface"])
2520
738
global main_loop
2521
741
# From the Avahi example code
2522
DBusGMainLoop(set_as_default=True)
742
DBusGMainLoop(set_as_default=True )
2523
743
main_loop = gobject.MainLoop()
2524
744
bus = dbus.SystemBus()
745
server = dbus.Interface(
746
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
747
avahi.DBUS_INTERFACE_SERVER )
2525
748
# End of Avahi example code
2528
bus_name = dbus.service.BusName("se.recompile.Mandos",
2529
bus, do_not_queue=True)
2530
old_bus_name = (dbus.service.BusName
2531
("se.bsnet.fukt.Mandos", bus,
2533
except dbus.exceptions.NameExistsException as e:
2534
logger.error("Disabling D-Bus:", exc_info=e)
2536
server_settings["use_dbus"] = False
2537
tcp_server.use_dbus = False
2538
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2539
service = AvahiServiceToSyslog(name =
2540
server_settings["servicename"],
2541
servicetype = "_mandos._tcp",
2542
protocol = protocol, bus = bus)
2543
if server_settings["interface"]:
2544
service.interface = (if_nametoindex
2545
(str(server_settings["interface"])))
2547
global multiprocessing_manager
2548
multiprocessing_manager = multiprocessing.Manager()
2550
client_class = Client
2552
client_class = functools.partial(ClientDBus, bus = bus)
2554
client_settings = Client.config_parser(client_config)
2555
old_client_settings = {}
2558
# This is used to redirect stdout and stderr for checker processes
2560
wnull = open(os.devnull, "w") # A writable /dev/null
2561
# Only used if server is running in foreground but not in debug
2563
if debug or not foreground:
2566
# Get client data and settings from last running state.
2567
if server_settings["restore"]:
2569
with open(stored_state_path, "rb") as stored_state:
2570
clients_data, old_client_settings = (pickle.load
2572
os.remove(stored_state_path)
2573
except IOError as e:
2574
if e.errno == errno.ENOENT:
2575
logger.warning("Could not load persistent state: {0}"
2576
.format(os.strerror(e.errno)))
2578
logger.critical("Could not load persistent state:",
2581
except EOFError as e:
2582
logger.warning("Could not load persistent state: "
2583
"EOFError:", exc_info=e)
2585
with PGPEngine() as pgp:
2586
for client_name, client in clients_data.iteritems():
2587
# Skip removed clients
2588
if client_name not in client_settings:
2591
# Decide which value to use after restoring saved state.
2592
# We have three different values: Old config file,
2593
# new config file, and saved state.
2594
# New config value takes precedence if it differs from old
2595
# config value, otherwise use saved state.
2596
for name, value in client_settings[client_name].items():
2598
# For each value in new config, check if it
2599
# differs from the old config value (Except for
2600
# the "secret" attribute)
2601
if (name != "secret" and
2602
value != old_client_settings[client_name]
2604
client[name] = value
2608
# Clients who has passed its expire date can still be
2609
# enabled if its last checker was successful. Clients
2610
# whose checker succeeded before we stored its state is
2611
# assumed to have successfully run all checkers during
2613
if client["enabled"]:
2614
if datetime.datetime.utcnow() >= client["expires"]:
2615
if not client["last_checked_ok"]:
2617
"disabling client {0} - Client never "
2618
"performed a successful checker"
2619
.format(client_name))
2620
client["enabled"] = False
2621
elif client["last_checker_status"] != 0:
2623
"disabling client {0} - Client "
2624
"last checker failed with error code {1}"
2625
.format(client_name,
2626
client["last_checker_status"]))
2627
client["enabled"] = False
2629
client["expires"] = (datetime.datetime
2631
+ client["timeout"])
2632
logger.debug("Last checker succeeded,"
2633
" keeping {0} enabled"
2634
.format(client_name))
2636
client["secret"] = (
2637
pgp.decrypt(client["encrypted_secret"],
2638
client_settings[client_name]
2641
# If decryption fails, we use secret from new settings
2642
logger.debug("Failed to decrypt {0} old secret"
2643
.format(client_name))
2644
client["secret"] = (
2645
client_settings[client_name]["secret"])
2647
# Add/remove clients based on new changes made to config
2648
for client_name in (set(old_client_settings)
2649
- set(client_settings)):
2650
del clients_data[client_name]
2651
for client_name in (set(client_settings)
2652
- set(old_client_settings)):
2653
clients_data[client_name] = client_settings[client_name]
2655
# Create all client objects
2656
for client_name, client in clients_data.iteritems():
2657
tcp_server.clients[client_name] = client_class(
2658
name = client_name, settings = client,
2659
server_settings = server_settings)
2661
if not tcp_server.clients:
2662
logger.warning("No clients defined")
2665
if pidfile is not None:
2669
pidfile.write(str(pid) + "\n".encode("utf-8"))
2671
logger.error("Could not write to file %r with PID %d",
2676
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2677
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2680
@alternate_dbus_interfaces({"se.recompile.Mandos":
2681
"se.bsnet.fukt.Mandos"})
2682
class MandosDBusService(DBusObjectWithProperties):
2683
"""A D-Bus proxy object"""
2685
dbus.service.Object.__init__(self, bus, "/")
2686
_interface = "se.recompile.Mandos"
2688
@dbus_interface_annotations(_interface)
2690
return { "org.freedesktop.DBus.Property"
2691
".EmitsChangedSignal":
2694
@dbus.service.signal(_interface, signature="o")
2695
def ClientAdded(self, objpath):
2699
@dbus.service.signal(_interface, signature="ss")
2700
def ClientNotFound(self, fingerprint, address):
2704
@dbus.service.signal(_interface, signature="os")
2705
def ClientRemoved(self, objpath, name):
2709
@dbus.service.method(_interface, out_signature="ao")
2710
def GetAllClients(self):
2712
return dbus.Array(c.dbus_object_path
2714
tcp_server.clients.itervalues())
2716
@dbus.service.method(_interface,
2717
out_signature="a{oa{sv}}")
2718
def GetAllClientsWithProperties(self):
2720
return dbus.Dictionary(
2721
((c.dbus_object_path, c.GetAll(""))
2722
for c in tcp_server.clients.itervalues()),
2725
@dbus.service.method(_interface, in_signature="o")
2726
def RemoveClient(self, object_path):
2728
for c in tcp_server.clients.itervalues():
2729
if c.dbus_object_path == object_path:
2730
del tcp_server.clients[c.name]
2731
c.remove_from_connection()
2732
# Don't signal anything except ClientRemoved
2733
c.disable(quiet=True)
2735
self.ClientRemoved(object_path, c.name)
2737
raise KeyError(object_path)
2741
mandos_dbus_service = MandosDBusService()
750
debug = server_settings["debug"]
753
console = logging.StreamHandler()
754
# console.setLevel(logging.DEBUG)
755
console.setFormatter(logging.Formatter\
756
('%(levelname)s: %(message)s'))
757
logger.addHandler(console)
761
def remove_from_clients(client):
762
clients.remove(client)
764
logger.debug(u"No clients left, exiting")
767
clients.update(Set(Client(name=section,
768
stop_hook = remove_from_clients,
769
**(dict(client_config\
771
for section in client_config.sections()))
2744
777
"Cleanup function; run on exit"
2747
multiprocessing.active_children()
2749
if not (tcp_server.clients or client_settings):
2752
# Store client before exiting. Secrets are encrypted with key
2753
# based on what config file has. If config file is
2754
# removed/edited, old secret will thus be unrecovable.
2756
with PGPEngine() as pgp:
2757
for client in tcp_server.clients.itervalues():
2758
key = client_settings[client.name]["secret"]
2759
client.encrypted_secret = pgp.encrypt(client.secret,
2763
# A list of attributes that can not be pickled
2765
exclude = set(("bus", "changedstate", "secret",
2766
"checker", "server_settings"))
2767
for name, typ in (inspect.getmembers
2768
(dbus.service.Object)):
2771
client_dict["encrypted_secret"] = (client
2773
for attr in client.client_structure:
2774
if attr not in exclude:
2775
client_dict[attr] = getattr(client, attr)
2777
clients[client.name] = client_dict
2778
del client_settings[client.name]["secret"]
2781
with (tempfile.NamedTemporaryFile
2782
(mode='wb', suffix=".pickle", prefix='clients-',
2783
dir=os.path.dirname(stored_state_path),
2784
delete=False)) as stored_state:
2785
pickle.dump((clients, client_settings), stored_state)
2786
tempname=stored_state.name
2787
os.rename(tempname, stored_state_path)
2788
except (IOError, OSError) as e:
2794
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2795
logger.warning("Could not save persistent state: {0}"
2796
.format(os.strerror(e.errno)))
2798
logger.warning("Could not save persistent state:",
2802
# Delete all clients, and settings from config
2803
while tcp_server.clients:
2804
name, client = tcp_server.clients.popitem()
2806
client.remove_from_connection()
2807
# Don't signal anything except ClientRemoved
2808
client.disable(quiet=True)
2811
mandos_dbus_service.ClientRemoved(client
2814
client_settings.clear()
779
# From the Avahi example code
780
if not group is None:
783
# End of Avahi example code
786
client = clients.pop()
787
client.stop_hook = None
2816
790
atexit.register(cleanup)
2818
for client in tcp_server.clients.itervalues():
2821
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2822
# Need to initiate checking of clients
2824
client.init_checker()
2827
tcp_server.server_activate()
793
signal.signal(signal.SIGINT, signal.SIG_IGN)
794
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
795
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
797
for client in clients:
800
tcp_server = IPv6_TCPServer((server_settings["address"],
801
server_settings["port"]),
803
settings=server_settings,
2829
805
# Find out what port we got
2830
806
service.port = tcp_server.socket.getsockname()[1]
2832
logger.info("Now listening on address %r, port %d,"
2833
" flowinfo %d, scope_id %d",
2834
*tcp_server.socket.getsockname())
2836
logger.info("Now listening on address %r, port %d",
2837
*tcp_server.socket.getsockname())
807
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
808
u" scope_id %d" % tcp_server.socket.getsockname())
2839
810
#service.interface = tcp_server.socket.getsockname()[3]
2842
813
# From the Avahi example code
814
server.connect_to_signal("StateChanged", server_state_changed)
2845
except dbus.exceptions.DBusException as error:
2846
logger.critical("D-Bus Exception", exc_info=error)
816
server_state_changed(server.GetState())
817
except dbus.exceptions.DBusException, error:
818
logger.critical(u"DBusException: %s", error)
2849
820
# End of Avahi example code
2851
822
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2852
823
lambda *args, **kwargs:
2853
(tcp_server.handle_request
2854
(*args[2:], **kwargs) or True))
824
tcp_server.handle_request\
825
(*args[2:], **kwargs) or True)
2856
827
logger.debug("Starting main loop")
828
main_loop_started = True
2858
except AvahiError as error:
2859
logger.critical("Avahi Error", exc_info=error)
830
except AvahiError, error:
831
logger.critical(u"AvahiError: %s" + unicode(error))
2862
833
except KeyboardInterrupt:
2864
print("", file=sys.stderr)
2865
logger.debug("Server received KeyboardInterrupt")
2866
logger.debug("Server exiting")
2867
# Must run before the D-Bus bus name gets deregistered
2870
837
if __name__ == '__main__':