186
357
dbus.UInt16(self.port),
187
358
avahi.string_array_to_txt_array(self.TXT))
188
359
self.group.Commit()
189
361
def entry_group_state_changed(self, state, error):
190
362
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
363
logger.debug("Avahi entry group state change: %i", state)
193
365
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
366
logger.debug("Zeroconf service established.")
195
367
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
368
logger.info("Zeroconf service name collision.")
198
370
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
201
raise AvahiGroupError(u"State changed: %s"
371
logger.critical("Avahi: Error in group state changed %s",
373
raise AvahiGroupError("State changed: {!s}".format(error))
203
375
def cleanup(self):
204
376
"""Derived from the Avahi example code"""
205
377
if self.group is not None:
380
except (dbus.exceptions.UnknownMethodException,
381
dbus.exceptions.DBusException):
207
383
self.group = None
208
def server_state_changed(self, state):
386
def server_state_changed(self, state, error=None):
209
387
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
388
logger.debug("Avahi server state change: %i", state)
390
avahi.SERVER_INVALID: "Zeroconf server invalid",
391
avahi.SERVER_REGISTERING: None,
392
avahi.SERVER_COLLISION: "Zeroconf server name collision",
393
avahi.SERVER_FAILURE: "Zeroconf server failure",
395
if state in bad_states:
396
if bad_states[state] is not None:
398
logger.error(bad_states[state])
400
logger.error(bad_states[state] + ": %r", error)
213
402
elif state == avahi.SERVER_RUNNING:
405
except dbus.exceptions.DBusException as error:
406
if (error.get_dbus_name()
407
== "org.freedesktop.Avahi.CollisionError"):
408
logger.info("Local Zeroconf service name"
410
return self.rename(remove=False)
412
logger.critical("D-Bus Exception", exc_info=error)
417
logger.debug("Unknown state: %r", state)
419
logger.debug("Unknown state: %r: %r", state, error)
215
421
def activate(self):
216
422
"""Derived from the Avahi example code"""
217
423
if self.server is None:
218
424
self.server = dbus.Interface(
219
425
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
426
avahi.DBUS_PATH_SERVER,
427
follow_name_owner_changes=True),
221
428
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
429
self.server.connect_to_signal("StateChanged",
430
self.server_state_changed)
224
431
self.server_state_changed(self.server.GetState())
434
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
436
"""Add the new name to the syslog messages"""
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
474
class session_int(ctypes.Structure):
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
510
class CertificateSecurityError(Error):
514
class Credentials(object):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
522
gnutls.certificate_free_credentials(self._c_object)
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
538
self.credentials = credentials
541
gnutls.deinit(self._c_object)
544
return gnutls.handshake(self._c_object)
546
def send(self, data):
550
data_len -= gnutls.record_send(self._c_object,
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
614
handshake_set_private_extensions.restype = None
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
619
credentials_set.restype = _error_code
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
664
# All the function declarations below are from gnutls/openpgp.h
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
674
openpgp_crt_import.restype = _error_code
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
691
openpgp_crt_get_fingerprint.restype = _error_code
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
705
connection.send(func(*args, **kwargs))
227
708
class Client(object):
228
709
"""A representation of a client host served by this server.
231
name: string; from the config file, used in log messages and
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
712
approved: bool(); 'None' if not yet approved/disapproved
713
approval_delay: datetime.timedelta(); Time to wait for approval
714
approval_duration: datetime.timedelta(); Duration of one approval
245
715
checker: subprocess.Popen(); a running checker process used
246
716
to see if the client lives.
247
717
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
718
checker_callback_tag: a GObject event source tag, or None
719
checker_command: string; External command which is run to check
720
if client lives. %() expansions are done at
253
721
runtime with vars(self) as dict, so that for
254
722
instance %(name)s can be used in the command.
723
checker_initiator_tag: a GObject event source tag, or None
724
created: datetime.datetime(); (UTC) object creation
725
client_structure: Object describing what attributes a client has
726
and is used for storing the client at exit
255
727
current_checker_command: string; current running checker_command
728
disable_initiator_tag: a GObject event source tag, or None
730
fingerprint: string (40 or 32 hexadecimal digits); used to
731
uniquely identify the client
732
host: string; available for use by the checker command
733
interval: datetime.timedelta(); How often to start a new checker
734
last_approval_request: datetime.datetime(); (UTC) or None
735
last_checked_ok: datetime.datetime(); (UTC) or None
736
last_checker_status: integer between 0 and 255 reflecting exit
737
status of last checker. -1 reflects crashed
738
checker, -2 means no checker completed yet.
739
last_checker_signal: The signal which killed the last checker, if
740
last_checker_status is -1
741
last_enabled: datetime.datetime(); (UTC) or None
742
name: string; from the config file, used in log messages and
744
secret: bytestring; sent verbatim (over TLS) to client
745
timeout: datetime.timedelta(); How long from last_checked_ok
746
until this client is disabled
747
extended_timeout: extra long timeout when secret has been sent
748
runtime_expansions: Allowed attributes for runtime expansion.
749
expires: datetime.datetime(); time (UTC) when a client will be
751
server_settings: The server_settings dict from main()
754
runtime_expansions = ("approval_delay", "approval_duration",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
758
"last_enabled", "name", "timeout")
761
"extended_timeout": "PT15M",
763
"checker": "fping -q -- %%(host)s",
765
"approval_delay": "PT0S",
766
"approval_duration": "PT1S",
767
"approved_by_default": "True",
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
772
def config_parser(config):
773
"""Construct a new dict of client settings of this form:
774
{ client_name: {setting_name: value, ...}, ...}
775
with exceptions for any special settings as defined above.
776
NOTE: Must be a pure function. Must return the same result
777
value given the same arguments.
780
for client_name in config.sections():
781
section = dict(config.items(client_name))
782
client = settings[client_name] = {}
784
client["host"] = section["host"]
785
# Reformat values from string types to Python types
786
client["approved_by_default"] = config.getboolean(
787
client_name, "approved_by_default")
788
client["enabled"] = config.getboolean(client_name,
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
794
client["fingerprint"] = (section["fingerprint"].upper()
796
if "secret" in section:
797
client["secret"] = section["secret"].decode("base64")
798
elif "secfile" in section:
799
with open(os.path.expanduser(os.path.expandvars
800
(section["secfile"])),
802
client["secret"] = secfile.read()
804
raise TypeError("No secret or secfile for section {}"
806
client["timeout"] = string_to_delta(section["timeout"])
807
client["extended_timeout"] = string_to_delta(
808
section["extended_timeout"])
809
client["interval"] = string_to_delta(section["interval"])
810
client["approval_delay"] = string_to_delta(
811
section["approval_delay"])
812
client["approval_duration"] = string_to_delta(
813
section["approval_duration"])
814
client["checker_command"] = section["checker"]
815
client["last_approval_request"] = None
816
client["last_checked_ok"] = None
817
client["last_checker_status"] = -2
821
def __init__(self, settings, name = None, server_settings=None):
280
logger.debug(u"Creating client %r", self.name)
281
# Uppercase and remove spaces from fingerprint for later
282
# comparison purposes with return value from the fingerprint()
284
self.fingerprint = (config[u"fingerprint"].upper()
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
823
if server_settings is None:
825
self.server_settings = server_settings
826
# adding all client settings
827
for setting, value in settings.items():
828
setattr(self, setting, value)
831
if not hasattr(self, "last_enabled"):
832
self.last_enabled = datetime.datetime.utcnow()
833
if not hasattr(self, "expires"):
834
self.expires = (datetime.datetime.utcnow()
295
raise TypeError(u"No secret or secfile for client %s"
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
837
self.last_enabled = None
840
logger.debug("Creating client %r", self.name)
841
logger.debug(" Fingerprint: %s", self.fingerprint)
842
self.created = settings.get("created",
843
datetime.datetime.utcnow())
845
# attributes specific for this server instance
305
846
self.checker = None
306
847
self.checker_initiator_tag = None
307
848
self.disable_initiator_tag = None
308
849
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
850
self.current_checker_command = None
311
self.last_connect = None
852
self.approvals_pending = 0
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
857
if not attr.startswith("_")]
858
self.client_structure.append("client_structure")
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
862
if not name.startswith("_"):
863
self.client_structure.append(name)
865
# Send notice to process children that client state has changed
866
def send_changedstate(self):
867
with self.changedstate:
868
self.changedstate.notify_all()
313
870
def enable(self):
314
871
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
872
if getattr(self, "enabled", False):
316
873
# Already enabled
875
self.expires = datetime.datetime.utcnow() + self.timeout
318
877
self.last_enabled = datetime.datetime.utcnow()
879
self.send_changedstate()
881
def disable(self, quiet=True):
882
"""Disable this client."""
883
if not getattr(self, "enabled", False):
886
logger.info("Disabling client %s", self.name)
887
if getattr(self, "disable_initiator_tag", None) is not None:
888
GObject.source_remove(self.disable_initiator_tag)
889
self.disable_initiator_tag = None
891
if getattr(self, "checker_initiator_tag", None) is not None:
892
GObject.source_remove(self.checker_initiator_tag)
893
self.checker_initiator_tag = None
897
self.send_changedstate()
898
# Do not run this again if called by a GObject.timeout_add
904
def init_checker(self):
319
905
# Schedule a new checker to be started an 'interval' from now,
320
906
# and every interval from then on.
321
self.checker_initiator_tag = (gobject.timeout_add
322
(self.interval_milliseconds(),
907
if self.checker_initiator_tag is not None:
908
GObject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = GObject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
912
# Schedule a disable() when 'timeout' has passed
913
if self.disable_initiator_tag is not None:
914
GObject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = GObject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
324
917
# Also start a new checker *right now*.
325
918
self.start_checker()
326
# Schedule a disable() when 'timeout' has passed
327
self.disable_initiator_tag = (gobject.timeout_add
328
(self.timeout_milliseconds(),
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
344
if self.disable_hook:
345
self.disable_hook(self)
347
# Do not run this again if called by a gobject.timeout_add
351
self.disable_hook = None
354
def checker_callback(self, pid, condition, command):
920
def checker_callback(self, source, condition, connection,
355
922
"""The checker has completed, so take appropriate actions."""
356
923
self.checker_callback_tag = None
357
924
self.checker = None
358
if os.WIFEXITED(condition):
359
exitstatus = os.WEXITSTATUS(condition)
361
logger.info(u"Checker for %(name)s succeeded",
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
932
if self.last_checker_status == 0:
933
logger.info("Checker for %(name)s succeeded",
363
935
self.checked_ok()
365
logger.info(u"Checker for %(name)s failed",
937
logger.info("Checker for %(name)s failed", vars(self))
368
logger.warning(u"Checker for %(name)s crashed?",
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
941
logger.warning("Checker for %(name)s crashed?",
371
945
def checked_ok(self):
372
"""Bump up the timeout for this client.
374
This should only be called when the client has been seen,
946
"""Assert that the client has been seen, alive and well."""
377
947
self.last_checked_ok = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
948
self.last_checker_status = 0
949
self.last_checker_signal = None
952
def bump_timeout(self, timeout=None):
953
"""Bump up the timeout for this client."""
955
timeout = self.timeout
956
if self.disable_initiator_tag is not None:
957
GObject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
959
if getattr(self, "enabled", False):
960
self.disable_initiator_tag = GObject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
962
self.expires = datetime.datetime.utcnow() + timeout
964
def need_approval(self):
965
self.last_approval_request = datetime.datetime.utcnow()
383
967
def start_checker(self):
384
968
"""Start a new checker subprocess if one is not running.
386
970
If a checker already exists, leave it running and do
388
972
# The reason for not killing a running checker is that if we
389
# did that, then if a checker (for some reason) started
390
# running slowly and taking more than 'interval' time, the
391
# client would inevitably timeout, since no checker would get
392
# a chance to run to completion. If we instead leave running
973
# did that, and if a checker (for some reason) started running
974
# slowly and taking more than 'interval' time, then the client
975
# would inevitably timeout, since no checker would get a
976
# chance to run to completion. If we instead leave running
393
977
# checkers alone, the checker would have to take more time
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
978
# than 'timeout' for the client to be disabled, which is as it
397
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
401
logger.warning(u"Checker was a zombie")
402
gobject.source_remove(self.checker_callback_tag)
403
self.checker_callback(pid, status,
404
self.current_checker_command)
981
if self.checker is not None and not self.checker.is_alive():
982
logger.warning("Checker was not alive; joining")
405
985
# Start a new checker if needed
406
986
if self.checker is None:
987
# Escape attributes for the shell
989
attr: re.escape(str(getattr(self, attr)))
990
for attr in self.runtime_expansions }
408
# In case checker_command has exactly one % operator
409
command = self.checker_command % self.host
411
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
417
vars(self).iteritems())
419
command = self.checker_command % escaped_attrs
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
423
return True # Try again later
992
command = self.checker_command % escaped_attrs
993
except TypeError as error:
994
logger.error('Could not format string "%s"',
995
self.checker_command,
997
return True # Try again later
424
998
self.current_checker_command = command
426
logger.info(u"Starting checker %r for %s",
428
# We don't need to redirect stdout and stderr, since
429
# in normal mode, that is already done by daemon(),
430
# and in debug mode we don't want to. (Stdin is
431
# always replaced by /dev/null.)
432
self.checker = subprocess.Popen(command,
434
shell=True, cwd=u"/")
435
self.checker_callback_tag = (gobject.child_watch_add
437
self.checker_callback,
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
448
# Re-run this periodically if run by gobject.timeout_add
999
logger.info("Starting checker %r for %s", command,
1001
# We don't need to redirect stdout and stderr, since
1002
# in normal mode, that is already done by daemon(),
1003
# and in debug mode we don't want to. (Stdin is
1004
# always replaced by /dev/null.)
1005
# The exception is when not debugging but nevertheless
1006
# running in the foreground; use the previously
1008
popen_args = { "close_fds": True,
1011
if (not self.server_settings["debug"]
1012
and self.server_settings["foreground"]):
1013
popen_args.update({"stdout": wnull,
1015
pipe = multiprocessing.Pipe(duplex = False)
1016
self.checker = multiprocessing.Process(
1018
args = (pipe[1], subprocess.call, command),
1019
kwargs = popen_args)
1020
self.checker.start()
1021
self.checker_callback_tag = GObject.io_add_watch(
1022
pipe[0].fileno(), GObject.IO_IN,
1023
self.checker_callback, pipe[0], command)
1024
# Re-run this periodically if run by GObject.timeout_add
451
1027
def stop_checker(self):
452
1028
"""Force the checker process, if any, to stop."""
453
1029
if self.checker_callback_tag:
454
gobject.source_remove(self.checker_callback_tag)
1030
GObject.source_remove(self.checker_callback_tag)
455
1031
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
1032
if getattr(self, "checker", None) is None:
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
460
os.kill(self.checker.pid, signal.SIGTERM)
462
#if self.checker.poll() is None:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
465
if error.errno != errno.ESRCH: # No such process
1034
logger.debug("Stopping checker for %(name)s", vars(self))
1035
self.checker.terminate()
467
1036
self.checker = None
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
477
return now < (self.last_checked_ok + self.timeout)
480
class ClientDBus(Client, dbus.service.Object):
1039
def dbus_service_property(dbus_interface,
1043
"""Decorators for marking methods of a DBusObjectWithProperties to
1044
become properties on the D-Bus.
1046
The decorated method will be called with no arguments by "Get"
1047
and with one argument by "Set".
1049
The parameters, where they are supported, are the same as
1050
dbus.service.method, except there is only "signature", since the
1051
type from Get() and the type sent to Set() is the same.
1053
# Encoding deeply encoded byte arrays is not supported yet by the
1054
# "Set" method, so we fail early here:
1055
if byte_arrays and signature != "ay":
1056
raise ValueError("Byte arrays not supported for non-'ay'"
1057
" signature {!r}".format(signature))
1059
def decorator(func):
1060
func._dbus_is_property = True
1061
func._dbus_interface = dbus_interface
1062
func._dbus_signature = signature
1063
func._dbus_access = access
1064
func._dbus_name = func.__name__
1065
if func._dbus_name.endswith("_dbus_property"):
1066
func._dbus_name = func._dbus_name[:-14]
1067
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1073
def dbus_interface_annotations(dbus_interface):
1074
"""Decorator for marking functions returning interface annotations
1078
@dbus_interface_annotations("org.example.Interface")
1079
def _foo(self): # Function name does not matter
1080
return {"org.freedesktop.DBus.Deprecated": "true",
1081
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1085
def decorator(func):
1086
func._dbus_is_interface = True
1087
func._dbus_interface = dbus_interface
1088
func._dbus_name = dbus_interface
1094
def dbus_annotations(annotations):
1095
"""Decorator to annotate D-Bus methods, signals or properties
1098
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1099
"org.freedesktop.DBus.Property."
1100
"EmitsChangedSignal": "false"})
1101
@dbus_service_property("org.example.Interface", signature="b",
1103
def Property_dbus_property(self):
1104
return dbus.Boolean(False)
1106
See also the DBusObjectWithAnnotations class.
1109
def decorator(func):
1110
func._dbus_annotations = annotations
1116
class DBusPropertyException(dbus.exceptions.DBusException):
1117
"""A base class for D-Bus property-related exceptions
1122
class DBusPropertyAccessException(DBusPropertyException):
1123
"""A property's access permissions disallows an operation.
1128
class DBusPropertyNotFound(DBusPropertyException):
1129
"""An attempt was made to access a non-existing property.
1134
class DBusObjectWithAnnotations(dbus.service.Object):
1135
"""A D-Bus object with annotations.
1137
Classes inheriting from this can use the dbus_annotations
1138
decorator to add annotations to methods or signals.
1142
def _is_dbus_thing(thing):
1143
"""Returns a function testing if an attribute is a D-Bus thing
1145
If called like _is_dbus_thing("method") it returns a function
1146
suitable for use as predicate to inspect.getmembers().
1148
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1151
def _get_all_dbus_things(self, thing):
1152
"""Returns a generator of (name, attribute) pairs
1154
return ((getattr(athing.__get__(self), "_dbus_name", name),
1155
athing.__get__(self))
1156
for cls in self.__class__.__mro__
1158
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1160
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1161
out_signature = "s",
1162
path_keyword = 'object_path',
1163
connection_keyword = 'connection')
1164
def Introspect(self, object_path, connection):
1165
"""Overloading of standard D-Bus method.
1167
Inserts annotation tags on methods and signals.
1169
xmlstring = dbus.service.Object.Introspect(self, object_path,
1172
document = xml.dom.minidom.parseString(xmlstring)
1174
for if_tag in document.getElementsByTagName("interface"):
1175
# Add annotation tags
1176
for typ in ("method", "signal"):
1177
for tag in if_tag.getElementsByTagName(typ):
1179
for name, prop in (self.
1180
_get_all_dbus_things(typ)):
1181
if (name == tag.getAttribute("name")
1182
and prop._dbus_interface
1183
== if_tag.getAttribute("name")):
1184
annots.update(getattr(
1185
prop, "_dbus_annotations", {}))
1186
for name, value in annots.items():
1187
ann_tag = document.createElement(
1189
ann_tag.setAttribute("name", name)
1190
ann_tag.setAttribute("value", value)
1191
tag.appendChild(ann_tag)
1192
# Add interface annotation tags
1193
for annotation, value in dict(
1194
itertools.chain.from_iterable(
1195
annotations().items()
1196
for name, annotations
1197
in self._get_all_dbus_things("interface")
1198
if name == if_tag.getAttribute("name")
1200
ann_tag = document.createElement("annotation")
1201
ann_tag.setAttribute("name", annotation)
1202
ann_tag.setAttribute("value", value)
1203
if_tag.appendChild(ann_tag)
1204
# Fix argument name for the Introspect method itself
1205
if (if_tag.getAttribute("name")
1206
== dbus.INTROSPECTABLE_IFACE):
1207
for cn in if_tag.getElementsByTagName("method"):
1208
if cn.getAttribute("name") == "Introspect":
1209
for arg in cn.getElementsByTagName("arg"):
1210
if (arg.getAttribute("direction")
1212
arg.setAttribute("name",
1214
xmlstring = document.toxml("utf-8")
1216
except (AttributeError, xml.dom.DOMException,
1217
xml.parsers.expat.ExpatError) as error:
1218
logger.error("Failed to override Introspection method",
1223
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1224
"""A D-Bus object with properties.
1226
Classes inheriting from this can use the dbus_service_property
1227
decorator to expose methods as D-Bus properties. It exposes the
1228
standard Get(), Set(), and GetAll() methods on the D-Bus.
1231
def _get_dbus_property(self, interface_name, property_name):
1232
"""Returns a bound method if one exists which is a D-Bus
1233
property with the specified name and interface.
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
1238
if (value._dbus_name == property_name
1239
and value._dbus_interface == interface_name):
1240
return value.__get__(self)
1243
raise DBusPropertyNotFound("{}:{}.{}".format(
1244
self.dbus_object_path, interface_name, property_name))
1247
def _get_all_interface_names(cls):
1248
"""Get a sequence of all interfaces supported by an object"""
1249
return (name for name in set(getattr(getattr(x, attr),
1250
"_dbus_interface", None)
1251
for x in (inspect.getmro(cls))
1253
if name is not None)
1255
@dbus.service.method(dbus.PROPERTIES_IFACE,
1258
def Get(self, interface_name, property_name):
1259
"""Standard D-Bus property Get() method, see D-Bus standard.
1261
prop = self._get_dbus_property(interface_name, property_name)
1262
if prop._dbus_access == "write":
1263
raise DBusPropertyAccessException(property_name)
1265
if not hasattr(value, "variant_level"):
1267
return type(value)(value, variant_level=value.variant_level+1)
1269
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1270
def Set(self, interface_name, property_name, value):
1271
"""Standard D-Bus property Set() method, see D-Bus standard.
1273
prop = self._get_dbus_property(interface_name, property_name)
1274
if prop._dbus_access == "read":
1275
raise DBusPropertyAccessException(property_name)
1276
if prop._dbus_get_args_options["byte_arrays"]:
1277
# The byte_arrays option is not supported yet on
1278
# signatures other than "ay".
1279
if prop._dbus_signature != "ay":
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
1283
value = dbus.ByteArray(b''.join(chr(byte)
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1289
out_signature="a{sv}")
1290
def GetAll(self, interface_name):
1291
"""Standard D-Bus property GetAll() method, see D-Bus
1294
Note: Will not include properties with access="write".
1297
for name, prop in self._get_all_dbus_things("property"):
1299
and interface_name != prop._dbus_interface):
1300
# Interface non-empty but did not match
1302
# Ignore write-only properties
1303
if prop._dbus_access == "write":
1306
if not hasattr(value, "variant_level"):
1307
properties[name] = value
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
1311
return dbus.Dictionary(properties, signature="sv")
1313
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1314
def PropertiesChanged(self, interface_name, changed_properties,
1315
invalidated_properties):
1316
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1321
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1323
path_keyword='object_path',
1324
connection_keyword='connection')
1325
def Introspect(self, object_path, connection):
1326
"""Overloading of standard D-Bus method.
1328
Inserts property tags and interface annotation tags.
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1334
document = xml.dom.minidom.parseString(xmlstring)
1336
def make_tag(document, name, prop):
1337
e = document.createElement("property")
1338
e.setAttribute("name", name)
1339
e.setAttribute("type", prop._dbus_signature)
1340
e.setAttribute("access", prop._dbus_access)
1343
for if_tag in document.getElementsByTagName("interface"):
1345
for tag in (make_tag(document, name, prop)
1347
in self._get_all_dbus_things("property")
1348
if prop._dbus_interface
1349
== if_tag.getAttribute("name")):
1350
if_tag.appendChild(tag)
1351
# Add annotation tags for properties
1352
for tag in if_tag.getElementsByTagName("property"):
1354
for name, prop in self._get_all_dbus_things(
1356
if (name == tag.getAttribute("name")
1357
and prop._dbus_interface
1358
== if_tag.getAttribute("name")):
1359
annots.update(getattr(
1360
prop, "_dbus_annotations", {}))
1361
for name, value in annots.items():
1362
ann_tag = document.createElement(
1364
ann_tag.setAttribute("name", name)
1365
ann_tag.setAttribute("value", value)
1366
tag.appendChild(ann_tag)
1367
# Add the names to the return values for the
1368
# "org.freedesktop.DBus.Properties" methods
1369
if (if_tag.getAttribute("name")
1370
== "org.freedesktop.DBus.Properties"):
1371
for cn in if_tag.getElementsByTagName("method"):
1372
if cn.getAttribute("name") == "Get":
1373
for arg in cn.getElementsByTagName("arg"):
1374
if (arg.getAttribute("direction")
1376
arg.setAttribute("name", "value")
1377
elif cn.getAttribute("name") == "GetAll":
1378
for arg in cn.getElementsByTagName("arg"):
1379
if (arg.getAttribute("direction")
1381
arg.setAttribute("name", "props")
1382
xmlstring = document.toxml("utf-8")
1384
except (AttributeError, xml.dom.DOMException,
1385
xml.parsers.expat.ExpatError) as error:
1386
logger.error("Failed to override Introspection method",
1391
dbus.OBJECT_MANAGER_IFACE
1392
except AttributeError:
1393
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1395
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
"""A D-Bus object with an ObjectManager.
1398
Classes inheriting from this exposes the standard
1399
GetManagedObjects call and the InterfacesAdded and
1400
InterfacesRemoved signals on the standard
1401
"org.freedesktop.DBus.ObjectManager" interface.
1403
Note: No signals are sent automatically; they must be sent
1406
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1408
def GetManagedObjects(self):
1409
"""This function must be overridden"""
1410
raise NotImplementedError()
1412
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1414
def InterfacesAdded(self, object_path, interfaces_and_properties):
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1418
def InterfacesRemoved(self, object_path, interfaces):
1421
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1425
def Introspect(self, object_path, connection):
1426
"""Overloading of standard D-Bus method.
1428
Override return argument name of GetManagedObjects to be
1429
"objpath_interfaces_and_properties"
1431
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1435
document = xml.dom.minidom.parseString(xmlstring)
1437
for if_tag in document.getElementsByTagName("interface"):
1438
# Fix argument name for the GetManagedObjects method
1439
if (if_tag.getAttribute("name")
1440
== dbus.OBJECT_MANAGER_IFACE):
1441
for cn in if_tag.getElementsByTagName("method"):
1442
if (cn.getAttribute("name")
1443
== "GetManagedObjects"):
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1449
"objpath_interfaces"
1451
xmlstring = document.toxml("utf-8")
1453
except (AttributeError, xml.dom.DOMException,
1454
xml.parsers.expat.ExpatError) as error:
1455
logger.error("Failed to override Introspection method",
1459
def datetime_to_dbus(dt, variant_level=0):
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1462
return dbus.String("", variant_level = variant_level)
1463
return dbus.String(dt.isoformat(), variant_level=variant_level)
1466
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1467
"""A class decorator; applied to a subclass of
1468
dbus.service.Object, it will add alternate D-Bus attributes with
1469
interface names according to the "alt_interface_names" mapping.
1472
@alternate_dbus_interfaces({"org.example.Interface":
1473
"net.example.AlternateInterface"})
1474
class SampleDBusObject(dbus.service.Object):
1475
@dbus.service.method("org.example.Interface")
1476
def SampleDBusMethod():
1479
The above "SampleDBusMethod" on "SampleDBusObject" will be
1480
reachable via two interfaces: "org.example.Interface" and
1481
"net.example.AlternateInterface", the latter of which will have
1482
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1483
"true", unless "deprecate" is passed with a False value.
1485
This works for methods and signals, and also for D-Bus properties
1486
(from DBusObjectWithProperties) and interfaces (from the
1487
dbus_interface_annotations decorator).
1491
for orig_interface_name, alt_interface_name in (
1492
alt_interface_names.items()):
1494
interface_names = set()
1495
# Go though all attributes of the class
1496
for attrname, attribute in inspect.getmembers(cls):
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
1498
# with the wrong interface name
1499
if (not hasattr(attribute, "_dbus_interface")
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
1503
# Create an alternate D-Bus interface name based on
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
1508
# Is this a D-Bus signal?
1509
if getattr(attribute, "_dbus_is_signal", False):
1510
if sys.version_info.major == 2:
1511
# Extract the original non-method undecorated
1512
# function by black magic
1513
nonmethod_func = (dict(
1514
zip(attribute.func_code.co_freevars,
1515
attribute.__closure__))
1516
["func"].cell_contents)
1518
nonmethod_func = attribute
1519
# Create a new, but exactly alike, function
1520
# object, and decorate it to be a new D-Bus signal
1521
# with the alternate D-Bus interface name
1522
if sys.version_info.major == 2:
1523
new_function = types.FunctionType(
1524
nonmethod_func.func_code,
1525
nonmethod_func.func_globals,
1526
nonmethod_func.func_name,
1527
nonmethod_func.func_defaults,
1528
nonmethod_func.func_closure)
1530
new_function = types.FunctionType(
1531
nonmethod_func.__code__,
1532
nonmethod_func.__globals__,
1533
nonmethod_func.__name__,
1534
nonmethod_func.__defaults__,
1535
nonmethod_func.__closure__)
1536
new_function = (dbus.service.signal(
1538
attribute._dbus_signature)(new_function))
1539
# Copy annotations, if any
1541
new_function._dbus_annotations = dict(
1542
attribute._dbus_annotations)
1543
except AttributeError:
1545
# Define a creator of a function to call both the
1546
# original and alternate functions, so both the
1547
# original and alternate signals gets sent when
1548
# the function is called
1549
def fixscope(func1, func2):
1550
"""This function is a scope container to pass
1551
func1 and func2 to the "call_both" function
1552
outside of its arguments"""
1554
@functools.wraps(func2)
1555
def call_both(*args, **kwargs):
1556
"""This function will emit two D-Bus
1557
signals by calling func1 and func2"""
1558
func1(*args, **kwargs)
1559
func2(*args, **kwargs)
1560
# Make wrapper function look like a D-Bus signal
1561
for name, attr in inspect.getmembers(func2):
1562
if name.startswith("_dbus_"):
1563
setattr(call_both, name, attr)
1566
# Create the "call_both" function and add it to
1568
attr[attrname] = fixscope(attribute, new_function)
1569
# Is this a D-Bus method?
1570
elif getattr(attribute, "_dbus_is_method", False):
1571
# Create a new, but exactly alike, function
1572
# object. Decorate it to be a new D-Bus method
1573
# with the alternate D-Bus interface name. Add it
1576
dbus.service.method(
1578
attribute._dbus_in_signature,
1579
attribute._dbus_out_signature)
1580
(types.FunctionType(attribute.func_code,
1581
attribute.func_globals,
1582
attribute.func_name,
1583
attribute.func_defaults,
1584
attribute.func_closure)))
1585
# Copy annotations, if any
1587
attr[attrname]._dbus_annotations = dict(
1588
attribute._dbus_annotations)
1589
except AttributeError:
1591
# Is this a D-Bus property?
1592
elif getattr(attribute, "_dbus_is_property", False):
1593
# Create a new, but exactly alike, function
1594
# object, and decorate it to be a new D-Bus
1595
# property with the alternate D-Bus interface
1596
# name. Add it to the class.
1597
attr[attrname] = (dbus_service_property(
1598
alt_interface, attribute._dbus_signature,
1599
attribute._dbus_access,
1600
attribute._dbus_get_args_options
1602
(types.FunctionType(
1603
attribute.func_code,
1604
attribute.func_globals,
1605
attribute.func_name,
1606
attribute.func_defaults,
1607
attribute.func_closure)))
1608
# Copy annotations, if any
1610
attr[attrname]._dbus_annotations = dict(
1611
attribute._dbus_annotations)
1612
except AttributeError:
1614
# Is this a D-Bus interface?
1615
elif getattr(attribute, "_dbus_is_interface", False):
1616
# Create a new, but exactly alike, function
1617
# object. Decorate it to be a new D-Bus interface
1618
# with the alternate D-Bus interface name. Add it
1621
dbus_interface_annotations(alt_interface)
1622
(types.FunctionType(attribute.func_code,
1623
attribute.func_globals,
1624
attribute.func_name,
1625
attribute.func_defaults,
1626
attribute.func_closure)))
1628
# Deprecate all alternate interfaces
1629
iname="_AlternateDBusNames_interface_annotation{}"
1630
for interface_name in interface_names:
1632
@dbus_interface_annotations(interface_name)
1634
return { "org.freedesktop.DBus.Deprecated":
1636
# Find an unused name
1637
for aname in (iname.format(i)
1638
for i in itertools.count()):
1639
if aname not in attr:
1643
# Replace the class with a new subclass of it with
1644
# methods, signals, etc. as created above.
1645
cls = type(b"{}Alternate".format(cls.__name__),
1652
@alternate_dbus_interfaces({"se.recompile.Mandos":
1653
"se.bsnet.fukt.Mandos"})
1654
class ClientDBus(Client, DBusObjectWithProperties):
481
1655
"""A Client class using D-Bus
484
1658
dbus_object_path: dbus.ObjectPath
485
1659
bus: dbus.SystemBus()
1662
runtime_expansions = (Client.runtime_expansions
1663
+ ("dbus_object_path", ))
1665
_interface = "se.recompile.Mandos.Client"
487
1667
# dbus.service.Object doesn't use super(), so we can't either.
489
1669
def __init__(self, bus = None, *args, **kwargs):
491
1671
Client.__init__(self, *args, **kwargs)
492
1672
# Only now, when this client is initialized, can it show up on
494
self.dbus_object_path = (dbus.ObjectPath
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
1674
client_object_name = str(self.name).translate(
1675
{ord("."): ord("_"),
1676
ord("-"): ord("_")})
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
1679
DBusObjectWithProperties.__init__(self, self.bus,
1680
self.dbus_object_path)
1682
def notifychangeproperty(transform_func, dbus_name,
1683
type_func=lambda x: x,
1685
invalidate_only=False,
1686
_interface=_interface):
1687
""" Modify a variable so that it's a property which announces
1688
its changes to DBus.
1690
transform_fun: Function that takes a value and a variant_level
1691
and transforms it to a D-Bus type.
1692
dbus_name: D-Bus name of the variable
1693
type_func: Function that transform the value before sending it
1694
to the D-Bus. Default: no transform
1695
variant_level: D-Bus variant level. Default: 1
1697
attrname = "_{}".format(dbus_name)
1699
def setter(self, value):
1700
if hasattr(self, "dbus_object_path"):
1701
if (not hasattr(self, attrname) or
1702
type_func(getattr(self, attrname, None))
1703
!= type_func(value)):
1705
self.PropertiesChanged(
1706
_interface, dbus.Dictionary(),
1707
dbus.Array((dbus_name, )))
1709
dbus_value = transform_func(
1711
variant_level = variant_level)
1712
self.PropertyChanged(dbus.String(dbus_name),
1714
self.PropertiesChanged(
1716
dbus.Dictionary({ dbus.String(dbus_name):
1719
setattr(self, attrname, value)
1721
return property(lambda self: getattr(self, attrname), setter)
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1737
last_approval_request = notifychangeproperty(
1738
datetime_to_dbus, "LastApprovalRequest")
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
1740
"ApprovedByDefault")
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
1744
approval_duration = notifychangeproperty(
1745
dbus.UInt64, "ApprovalDuration",
1746
type_func = lambda td: td.total_seconds() * 1000)
1747
host = notifychangeproperty(dbus.String, "Host")
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
1751
extended_timeout = notifychangeproperty(
1752
dbus.UInt64, "ExtendedTimeout",
1753
type_func = lambda td: td.total_seconds() * 1000)
1754
interval = notifychangeproperty(
1755
dbus.UInt64, "Interval",
1756
type_func = lambda td: td.total_seconds() * 1000)
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
1761
del notifychangeproperty
528
1763
def __del__(self, *args, **kwargs):
530
1765
self.remove_from_connection()
531
1766
except LookupError:
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1768
if hasattr(DBusObjectWithProperties, "__del__"):
1769
DBusObjectWithProperties.__del__(self, *args, **kwargs)
535
1770
Client.__del__(self, *args, **kwargs)
537
def checker_callback(self, pid, condition, command,
539
self.checker_callback_tag = None
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
if os.WIFEXITED(condition):
545
exitstatus = os.WEXITSTATUS(condition)
1772
def checker_callback(self, source, condition,
1773
connection, command, *args, **kwargs):
1774
ret = Client.checker_callback(self, source, condition,
1775
connection, command, *args,
1777
exitstatus = self.last_checker_status
546
1779
# Emit D-Bus signal
547
1780
self.CheckerCompleted(dbus.Int16(exitstatus),
548
dbus.Int64(condition),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
549
1783
dbus.String(command))
551
1785
# Emit D-Bus signal
552
1786
self.CheckerCompleted(dbus.Int16(-1),
553
dbus.Int64(condition),
1788
# This is specific to GNU libC
1790
| self.last_checker_signal),
554
1791
dbus.String(command))
556
return Client.checker_callback(self, pid, condition, command,
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
568
1794
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
573
old_checker_pid = None
1795
old_checker_pid = getattr(self.checker, "pid", None)
574
1796
r = Client.start_checker(self, *args, **kwargs)
575
1797
# Only if new checker process was started
576
1798
if (self.checker is not None
577
1799
and old_checker_pid != self.checker.pid):
578
1800
# Emit D-Bus signal
579
1801
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
598
@dbus.service.method(_interface)
600
return self.checked_ok()
1804
def _reset_approved(self):
1805
self.approved = None
1808
def approve(self, value=True):
1809
self.approved = value
1810
GObject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
1812
self.send_changedstate()
1814
## D-Bus methods, signals & properties
602
1820
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
1821
@dbus.service.signal(_interface, signature="nxs")
604
1822
def CheckerCompleted(self, exitcode, waitstatus, command):
608
1826
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
1827
@dbus.service.signal(_interface, signature="s")
610
1828
def CheckerStarted(self, command):
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
662
1832
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1834
@dbus.service.signal(_interface, signature="sv")
664
1835
def PropertyChanged(self, property, value):
668
# ReceivedSecret - signal
1839
# GotSecret - signal
669
1840
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
1841
def GotSecret(self):
1843
Is sent after a successful transfer of secret from the Mandos
1844
server to mandos-client
674
1848
# Rejected - signal
675
@dbus.service.signal(_interface)
1849
@dbus.service.signal(_interface, signature="s")
1850
def Rejected(self, reason):
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
709
@dbus.service.method(_interface, in_signature=u"ay",
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
1854
# NeedApproval - signal
1855
@dbus.service.signal(_interface, signature="tb")
1856
def NeedApproval(self, timeout, default):
1858
return self.need_approval()
1863
@dbus.service.method(_interface, in_signature="b")
1864
def Approve(self, value):
1867
# CheckedOK - method
1868
@dbus.service.method(_interface)
1869
def CheckedOK(self):
724
1872
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
725
1874
@dbus.service.method(_interface)
726
1875
def Enable(self):
730
1879
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
731
1881
@dbus.service.method(_interface)
732
1882
def StartChecker(self):
734
1884
self.start_checker()
736
1886
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
737
1888
@dbus.service.method(_interface)
738
1889
def Disable(self):
742
1893
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
743
1895
@dbus.service.method(_interface)
744
1896
def StopChecker(self):
745
1897
self.stop_checker()
1901
# ApprovalPending - property
1902
@dbus_service_property(_interface, signature="b", access="read")
1903
def ApprovalPending_dbus_property(self):
1904
return dbus.Boolean(bool(self.approvals_pending))
1906
# ApprovedByDefault - property
1907
@dbus_service_property(_interface,
1910
def ApprovedByDefault_dbus_property(self, value=None):
1911
if value is None: # get
1912
return dbus.Boolean(self.approved_by_default)
1913
self.approved_by_default = bool(value)
1915
# ApprovalDelay - property
1916
@dbus_service_property(_interface,
1919
def ApprovalDelay_dbus_property(self, value=None):
1920
if value is None: # get
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1923
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1925
# ApprovalDuration - property
1926
@dbus_service_property(_interface,
1929
def ApprovalDuration_dbus_property(self, value=None):
1930
if value is None: # get
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1933
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1938
@dbus_service_property(_interface, signature="s", access="read")
1939
def Name_dbus_property(self):
1940
return dbus.String(self.name)
1942
# Fingerprint - property
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1945
@dbus_service_property(_interface, signature="s", access="read")
1946
def Fingerprint_dbus_property(self):
1947
return dbus.String(self.fingerprint)
1950
@dbus_service_property(_interface,
1953
def Host_dbus_property(self, value=None):
1954
if value is None: # get
1955
return dbus.String(self.host)
1956
self.host = str(value)
1958
# Created - property
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1961
@dbus_service_property(_interface, signature="s", access="read")
1962
def Created_dbus_property(self):
1963
return datetime_to_dbus(self.created)
1965
# LastEnabled - property
1966
@dbus_service_property(_interface, signature="s", access="read")
1967
def LastEnabled_dbus_property(self):
1968
return datetime_to_dbus(self.last_enabled)
1970
# Enabled - property
1971
@dbus_service_property(_interface,
1974
def Enabled_dbus_property(self, value=None):
1975
if value is None: # get
1976
return dbus.Boolean(self.enabled)
1982
# LastCheckedOK - property
1983
@dbus_service_property(_interface,
1986
def LastCheckedOK_dbus_property(self, value=None):
1987
if value is not None:
1990
return datetime_to_dbus(self.last_checked_ok)
1992
# LastCheckerStatus - property
1993
@dbus_service_property(_interface, signature="n", access="read")
1994
def LastCheckerStatus_dbus_property(self):
1995
return dbus.Int16(self.last_checker_status)
1997
# Expires - property
1998
@dbus_service_property(_interface, signature="s", access="read")
1999
def Expires_dbus_property(self):
2000
return datetime_to_dbus(self.expires)
2002
# LastApprovalRequest - property
2003
@dbus_service_property(_interface, signature="s", access="read")
2004
def LastApprovalRequest_dbus_property(self):
2005
return datetime_to_dbus(self.last_approval_request)
2007
# Timeout - property
2008
@dbus_service_property(_interface,
2011
def Timeout_dbus_property(self, value=None):
2012
if value is None: # get
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
2015
self.timeout = datetime.timedelta(0, 0, 0, value)
2016
# Reschedule disabling
2018
now = datetime.datetime.utcnow()
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
2021
# The timeout has passed
2024
if (getattr(self, "disable_initiator_tag", None)
2027
GObject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = GObject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2032
# ExtendedTimeout - property
2033
@dbus_service_property(_interface,
2036
def ExtendedTimeout_dbus_property(self, value=None):
2037
if value is None: # get
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2042
# Interval - property
2043
@dbus_service_property(_interface,
2046
def Interval_dbus_property(self, value=None):
2047
if value is None: # get
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
2049
self.interval = datetime.timedelta(0, 0, 0, value)
2050
if getattr(self, "checker_initiator_tag", None) is None:
2053
# Reschedule checker run
2054
GObject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = GObject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
2059
# Checker - property
2060
@dbus_service_property(_interface,
2063
def Checker_dbus_property(self, value=None):
2064
if value is None: # get
2065
return dbus.String(self.checker_command)
2066
self.checker_command = str(value)
2068
# CheckerRunning - property
2069
@dbus_service_property(_interface,
2072
def CheckerRunning_dbus_property(self, value=None):
2073
if value is None: # get
2074
return dbus.Boolean(self.checker is not None)
2076
self.start_checker()
2080
# ObjectPath - property
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
2084
@dbus_service_property(_interface, signature="o", access="read")
2085
def ObjectPath_dbus_property(self):
2086
return self.dbus_object_path # is already a dbus.ObjectPath
2090
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2092
@dbus_service_property(_interface,
2096
def Secret_dbus_property(self, value):
2097
self.secret = bytes(value)
2102
class ProxyClient(object):
2103
def __init__(self, child_pipe, fpr, address):
2104
self._pipe = child_pipe
2105
self._pipe.send(('init', fpr, address))
2106
if not self._pipe.recv():
2109
def __getattribute__(self, name):
2111
return super(ProxyClient, self).__getattribute__(name)
2112
self._pipe.send(('getattr', name))
2113
data = self._pipe.recv()
2114
if data[0] == 'data':
2116
if data[0] == 'function':
2118
def func(*args, **kwargs):
2119
self._pipe.send(('funcall', name, args, kwargs))
2120
return self._pipe.recv()[1]
2124
def __setattr__(self, name, value):
2126
return super(ProxyClient, self).__setattr__(name, value)
2127
self._pipe.send(('setattr', name, value))
750
2130
class ClientHandler(socketserver.BaseRequestHandler, object):
751
2131
"""A class to handle client connections.
754
2134
Note: This will run in its own forked process."""
756
2136
def handle(self):
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
session = (gnutls.connection
763
.ClientSession(self.request,
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
770
if int(line.strip().split()[0]) > 1:
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
776
# Note: gnutls.connection.X509Credentials is really a
777
# generic GnuTLS certificate credentials object so long as
778
# no X.509 keys are added to it. Therefore, we can use it
779
# here despite using OpenPGP certificates.
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
2137
with contextlib.closing(self.server.child_pipe) as child_pipe:
2138
logger.info("TCP connection from: %s",
2139
str(self.client_address))
2140
logger.debug("Pipe FD: %d",
2141
self.server.child_pipe.fileno())
2143
session = gnutls.ClientSession(self.request)
2145
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2146
# "+AES-256-CBC", "+SHA1",
2147
# "+COMP-NULL", "+CTYPE-OPENPGP",
785
2149
# Use a fallback default, since this MUST be set.
786
2150
priority = self.server.gnutls_priority
787
2151
if priority is None:
789
(gnutls.library.functions
790
.gnutls_priority_set_direct(session._c_object,
2153
gnutls.priority_set_direct(session._c_object, priority,
2156
# Start communication using the Mandos protocol
2157
# Get protocol number
2158
line = self.request.makefile().readline()
2159
logger.debug("Protocol version: %r", line)
2161
if int(line.strip().split()[0]) > 1:
2162
raise RuntimeError(line)
2163
except (ValueError, IndexError, RuntimeError) as error:
2164
logger.error("Unknown protocol version: %s", error)
2167
# Start GnuTLS connection
794
2169
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
2170
except gnutls.Error as error:
2171
logger.warning("Handshake failed: %s", error)
797
2172
# Do not run session.bye() here: the session is not
798
2173
# established. Just abandon the request.
800
logger.debug(u"Handshake succeeded")
2175
logger.debug("Handshake succeeded")
2177
approval_required = False
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
807
logger.debug(u"Fingerprint: %s", fpr)
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
2183
logger.warning("Bad certificate: %s", error)
2185
logger.debug("Fingerprint: %s", fpr)
2188
client = ProxyClient(child_pipe, fpr,
2189
self.client_address)
2193
if client.approval_delay:
2194
delay = client.approval_delay
2195
client.approvals_pending += 1
2196
approval_required = True
2199
if not client.enabled:
2200
logger.info("Client %s is disabled",
2202
if self.server.use_dbus:
2204
client.Rejected("Disabled")
2207
if client.approved or not client.approval_delay:
2208
#We are approved or approval is disabled
2210
elif client.approved is None:
2211
logger.info("Client %s needs approval",
2213
if self.server.use_dbus:
2215
client.NeedApproval(
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
2219
logger.warning("Client %s was not approved",
2221
if self.server.use_dbus:
2223
client.Rejected("Denied")
2226
#wait until timeout or approved
2227
time = datetime.datetime.now()
2228
client.changedstate.acquire()
2229
client.changedstate.wait(delay.total_seconds())
2230
client.changedstate.release()
2231
time2 = datetime.datetime.now()
2232
if (time2 - time) >= delay:
2233
if not client.approved_by_default:
2234
logger.warning("Client %s timed out while"
2235
" waiting for approval",
2237
if self.server.use_dbus:
2239
client.Rejected("Approval timed out")
2244
delay -= time2 - time
2247
session.send(client.secret)
2248
except gnutls.Error as error:
2249
logger.warning("gnutls send failed",
2253
logger.info("Sending secret to %s", client.name)
2254
# bump the timeout using extended_timeout
2255
client.bump_timeout(client.extended_timeout)
2256
if self.server.use_dbus:
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
825
ipc.write(u"SENDING %s\n" % client.name)
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
2261
if approval_required:
2262
client.approvals_pending -= 1
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
836
2270
def peer_certificate(session):
837
2271
"Return the peer's OpenPGP certificate as a bytestring"
838
2272
# If not an OpenPGP certificate...
839
if (gnutls.library.functions
840
.gnutls_certificate_type_get(session._c_object)
841
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
842
# ...do the normal thing
843
return session.peer_certificate
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
844
2277
list_size = ctypes.c_uint(1)
845
cert_list = (gnutls.library.functions
846
.gnutls_certificate_get_peers
2278
cert_list = (gnutls.certificate_get_peers
847
2279
(session._c_object, ctypes.byref(list_size)))
848
2280
if not bool(cert_list) and list_size.value != 0:
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
2281
raise gnutls.Error("error getting peer certificate")
851
2282
if list_size.value == 0:
853
2284
cert = cert_list[0]
983
2461
clients: set of Client objects
984
2462
gnutls_priority GnuTLS priority string
985
2463
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
990
Assumes a gobject.MainLoop event loop.
2465
Assumes a GObject.MainLoop event loop.
992
2468
def __init__(self, server_address, RequestHandlerClass,
993
interface=None, use_ipv6=True, clients=None,
994
gnutls_priority=None, use_dbus=True):
2472
gnutls_priority=None,
995
2475
self.enabled = False
996
2476
self.clients = clients
997
2477
if self.clients is None:
999
2479
self.use_dbus = use_dbus
1000
2480
self.gnutls_priority = gnutls_priority
1001
2481
IPv6_TCPServer.__init__(self, server_address,
1002
2482
RequestHandlerClass,
1003
2483
interface = interface,
1004
use_ipv6 = use_ipv6)
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
1005
2487
def server_activate(self):
1006
2488
if self.enabled:
1007
2489
return socketserver.TCPServer.server_activate(self)
1008
2491
def enable(self):
1009
2492
self.enabled = True
1010
def add_pipe(self, pipe):
2494
def add_pipe(self, parent_pipe, proc):
1011
2495
# Call "handle_ipc" for both data and EOF events
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1014
def handle_ipc(self, source, condition, file_objects={}):
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1022
# broken, usually for pipes and
1025
conditions_string = ' | '.join(name
1027
condition_names.iteritems()
1028
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1043
# Stop calling this function
1046
logger.debug(u"IPC command: %r", cmdline)
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1074
client.ReceivedSecret()
1077
logger.error(u"Sending secret to unknown client %s",
2496
GObject.io_add_watch(
2497
parent_pipe.fileno(),
2498
GObject.IO_IN | GObject.IO_HUP,
2499
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2503
def handle_ipc(self, source, condition,
2506
client_object=None):
2507
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (GObject.IO_ERR | GObject.IO_HUP):
2509
# Wait for other process to exit
2513
# Read a request from the child
2514
request = parent_pipe.recv()
2515
command = request[0]
2517
if command == 'init':
2519
address = request[2]
2521
for c in self.clients.itervalues():
2522
if c.fingerprint == fpr:
2526
logger.info("Client not found for fingerprint: %s, ad"
2527
"dress: %s", fpr, address)
2530
mandos_dbus_service.ClientNotFound(fpr,
2532
parent_pipe.send(False)
2535
GObject.io_add_watch(
2536
parent_pipe.fileno(),
2537
GObject.IO_IN | GObject.IO_HUP,
2538
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2541
client_object = client))
2542
parent_pipe.send(True)
2543
# remove the old hook in favor of the new above hook on
2546
if command == 'funcall':
2547
funcname = request[1]
2551
parent_pipe.send(('data', getattr(client_object,
2555
if command == 'getattr':
2556
attrname = request[1]
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
2562
'data', client_object.__getattribute__(attrname)))
2564
if command == 'setattr':
2565
attrname = request[1]
2567
setattr(client_object, attrname, value)
2572
def rfc3339_duration_to_delta(duration):
2573
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
2591
# Parsing an RFC 3339 duration with regular expressions is not
2592
# possible - there would have to be multiple places for the same
2593
# values, like seconds. The current code, while more esoteric, is
2594
# cleaner without depending on a parsing library. If Python had a
2595
# built-in library for parsing we would use it, but we'd like to
2596
# avoid excessive use of external libraries.
2598
# New type for defining tokens, syntax, and semantics all-in-one
2599
Token = collections.namedtuple("Token", (
2600
"regexp", # To match token; if "value" is not None, must have
2601
# a "group" containing digits
2602
"value", # datetime.timedelta or None
2603
"followers")) # Tokens valid after this token
2604
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2605
# the "duration" ABNF definition in RFC 3339, Appendix A.
2606
token_end = Token(re.compile(r"$"), None, frozenset())
2607
token_second = Token(re.compile(r"(\d+)S"),
2608
datetime.timedelta(seconds=1),
2609
frozenset((token_end, )))
2610
token_minute = Token(re.compile(r"(\d+)M"),
2611
datetime.timedelta(minutes=1),
2612
frozenset((token_second, token_end)))
2613
token_hour = Token(re.compile(r"(\d+)H"),
2614
datetime.timedelta(hours=1),
2615
frozenset((token_minute, token_end)))
2616
token_time = Token(re.compile(r"T"),
2618
frozenset((token_hour, token_minute,
2620
token_day = Token(re.compile(r"(\d+)D"),
2621
datetime.timedelta(days=1),
2622
frozenset((token_time, token_end)))
2623
token_month = Token(re.compile(r"(\d+)M"),
2624
datetime.timedelta(weeks=4),
2625
frozenset((token_day, token_end)))
2626
token_year = Token(re.compile(r"(\d+)Y"),
2627
datetime.timedelta(weeks=52),
2628
frozenset((token_month, token_end)))
2629
token_week = Token(re.compile(r"(\d+)W"),
2630
datetime.timedelta(weeks=1),
2631
frozenset((token_end, )))
2632
token_duration = Token(re.compile(r"P"), None,
2633
frozenset((token_year, token_month,
2634
token_day, token_time,
2636
# Define starting values
2637
value = datetime.timedelta() # Value so far
2639
followers = frozenset((token_duration, )) # Following valid tokens
2640
s = duration # String left to parse
2641
# Loop until end token is found
2642
while found_token is not token_end:
2643
# Search for any currently valid tokens
2644
for token in followers:
2645
match = token.regexp.match(s)
2646
if match is not None:
2648
if token.value is not None:
2649
# Value found, parse digits
2650
factor = int(match.group(1), 10)
2651
# Add to value so far
2652
value += factor * token.value
2653
# Strip token from string
2654
s = token.regexp.sub("", s, 1)
2657
# Set valid next tokens
2658
followers = found_token.followers
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1082
# Keep calling this function
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
1086
2668
def string_to_delta(interval):
1087
2669
"""Parse a string and return a datetime.timedelta
1089
>>> string_to_delta(u'7d')
2671
>>> string_to_delta('7d')
1090
2672
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
2673
>>> string_to_delta('60s')
1092
2674
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
2675
>>> string_to_delta('60m')
1094
2676
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
2677
>>> string_to_delta('24h')
1096
2678
datetime.timedelta(1)
1097
>>> string_to_delta(u'1w')
2679
>>> string_to_delta('1w')
1098
2680
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
2681
>>> string_to_delta('5m 30s')
1100
2682
datetime.timedelta(0, 330)
2686
return rfc3339_duration_to_delta(interval)
1102
2690
timevalue = datetime.timedelta(0)
1103
2691
for s in interval.split():
1105
suffix = unicode(s[-1])
1106
2694
value = int(s[:-1])
1108
2696
delta = datetime.timedelta(value)
1109
elif suffix == u"s":
1110
2698
delta = datetime.timedelta(0, value)
1111
elif suffix == u"m":
1112
2700
delta = datetime.timedelta(0, 0, 0, 0, value)
1113
elif suffix == u"h":
1114
2702
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1115
elif suffix == u"w":
1116
2704
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1119
except (ValueError, IndexError):
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
2708
raise ValueError(*(e.args))
1121
2709
timevalue += delta
1122
2710
return timevalue
1125
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1128
Note: This function cannot accept a unicode string."""
1129
global if_nametoindex
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
1134
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
1136
def if_nametoindex(interface):
1137
"Get an interface index the hard way, i.e. using fcntl()"
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
with closing(socket.socket()) as s:
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1143
interface_index = struct.unpack(str(u"I"),
1145
return interface_index
1146
return if_nametoindex(interface)
1149
2713
def daemon(nochdir = False, noclose = False):
1150
2714
"""See daemon(3). Standard BSD Unix function.
1175
######################################################################
2740
##################################################################
1176
2741
# Parsing of options, both command line and config file
1178
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
1203
options = parser.parse_args()[0]
2743
parser = argparse.ArgumentParser()
2744
parser.add_argument("-v", "--version", action="version",
2745
version = "%(prog)s {}".format(version),
2746
help="show version number and exit")
2747
parser.add_argument("-i", "--interface", metavar="IF",
2748
help="Bind to interface IF")
2749
parser.add_argument("-a", "--address",
2750
help="Address to listen for requests on")
2751
parser.add_argument("-p", "--port", type=int,
2752
help="Port number to receive requests on")
2753
parser.add_argument("--check", action="store_true",
2754
help="Run self-test")
2755
parser.add_argument("--debug", action="store_true",
2756
help="Debug mode; run in foreground and log"
2757
" to terminal", default=None)
2758
parser.add_argument("--debuglevel", metavar="LEVEL",
2759
help="Debug level for stdout output")
2760
parser.add_argument("--priority", help="GnuTLS"
2761
" priority string (see GnuTLS documentation)")
2762
parser.add_argument("--servicename",
2763
metavar="NAME", help="Zeroconf service name")
2764
parser.add_argument("--configdir",
2765
default="/etc/mandos", metavar="DIR",
2766
help="Directory to search for configuration"
2768
parser.add_argument("--no-dbus", action="store_false",
2769
dest="use_dbus", help="Do not provide D-Bus"
2770
" system bus interface", default=None)
2771
parser.add_argument("--no-ipv6", action="store_false",
2772
dest="use_ipv6", help="Do not use IPv6",
2774
parser.add_argument("--no-restore", action="store_false",
2775
dest="restore", help="Do not restore stored"
2776
" state", default=None)
2777
parser.add_argument("--socket", type=int,
2778
help="Specify a file descriptor to a network"
2779
" socket to use instead of creating one")
2780
parser.add_argument("--statedir", metavar="DIR",
2781
help="Directory to save/restore state in")
2782
parser.add_argument("--foreground", action="store_true",
2783
help="Run in foreground", default=None)
2784
parser.add_argument("--no-zeroconf", action="store_false",
2785
dest="zeroconf", help="Do not use Zeroconf",
2788
options = parser.parse_args()
1205
2790
if options.check:
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
1210
2795
# Default values for config file for server-global settings
1211
server_defaults = { u"interface": u"",
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
2796
server_defaults = { "interface": "",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2803
"servicename": "Mandos",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
1222
2814
# Parse config file for server-global settings
1223
2815
server_config = configparser.SafeConfigParser(server_defaults)
1224
2816
del server_defaults
1225
server_config.read(os.path.join(options.configdir,
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1227
2818
# Convert the SafeConfigParser object to a dict
1228
2819
server_settings = server_config.defaults()
1229
2820
# Use the appropriate methods on the non-string config options
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2822
server_settings[option] = server_config.getboolean("DEFAULT",
1233
2824
if server_settings["port"]:
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
2825
server_settings["port"] = server_config.getint("DEFAULT",
2827
if server_settings["socket"]:
2828
server_settings["socket"] = server_config.getint("DEFAULT",
2830
# Later, stdin will, and stdout and stderr might, be dup'ed
2831
# over with an opened os.devnull. But we don't want this to
2832
# happen with a supplied network socket.
2833
if 0 <= server_settings["socket"] <= 2:
2834
server_settings["socket"] = os.dup(server_settings
1236
2836
del server_config
1238
2838
# Override the settings from the config file with command line
1239
2839
# options, if set.
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
2840
for option in ("interface", "address", "port", "debug",
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
1243
2844
value = getattr(options, option)
1244
2845
if value is not None:
1245
2846
server_settings[option] = value
1247
2848
# Force all strings to be unicode
1248
2849
for option in server_settings.keys():
1249
if type(server_settings[option]) is str:
1250
server_settings[option] = unicode(server_settings[option])
2850
if isinstance(server_settings[option], bytes):
2851
server_settings[option] = (server_settings[option]
2853
# Force all boolean options to be boolean
2854
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2855
"foreground", "zeroconf"):
2856
server_settings[option] = bool(server_settings[option])
2857
# Debug implies foreground
2858
if server_settings["debug"]:
2859
server_settings["foreground"] = True
1251
2860
# Now we have our good server settings in "server_settings"
1253
2862
##################################################################
2864
if (not server_settings["zeroconf"]
2865
and not (server_settings["port"]
2866
or server_settings["socket"] != "")):
2867
parser.error("Needs port or socket to work without Zeroconf")
1255
2869
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
1261
syslogger.setLevel(logging.WARNING)
1262
console.setLevel(logging.WARNING)
1264
if server_settings[u"servicename"] != u"Mandos":
1265
syslogger.setFormatter(logging.Formatter
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
2870
debug = server_settings["debug"]
2871
debuglevel = server_settings["debuglevel"]
2872
use_dbus = server_settings["use_dbus"]
2873
use_ipv6 = server_settings["use_ipv6"]
2874
stored_state_path = os.path.join(server_settings["statedir"],
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2880
initlogger(debug, logging.DEBUG)
2885
level = getattr(logging, debuglevel.upper())
2886
initlogger(debug, level)
2888
if server_settings["servicename"] != "Mandos":
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
1270
2894
# Parse config file with clients
1271
client_defaults = { u"timeout": u"1h",
1273
u"checker": u"fping -q -- %%(host)s",
1276
client_config = configparser.SafeConfigParser(client_defaults)
1277
client_config.read(os.path.join(server_settings[u"configdir"],
2895
client_config = configparser.SafeConfigParser(Client
2897
client_config.read(os.path.join(server_settings["configdir"],
1280
2900
global mandos_dbus_service
1281
2901
mandos_dbus_service = None
1283
tcp_server = MandosServer((server_settings[u"address"],
1284
server_settings[u"port"]),
1286
interface=server_settings[u"interface"],
1289
server_settings[u"priority"],
1291
pidfilename = u"/var/run/mandos.pid"
1293
pidfile = open(pidfilename, u"w")
1295
logger.error(u"Could not open file %r", pidfilename)
2904
if server_settings["socket"] != "":
2905
socketfd = server_settings["socket"]
2906
tcp_server = MandosServer(
2907
(server_settings["address"], server_settings["port"]),
2909
interface=(server_settings["interface"] or None),
2911
gnutls_priority=server_settings["priority"],
2915
pidfilename = "/run/mandos.pid"
2916
if not os.path.isdir("/run/."):
2917
pidfilename = "/var/run/mandos.pid"
2920
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2921
except IOError as e:
2922
logger.error("Could not open file %r", pidfilename,
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
2925
for name, group in (("_mandos", "_mandos"),
2926
("mandos", "mandos"),
2927
("nobody", "nogroup")):
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
2929
uid = pwd.getpwnam(name).pw_uid
2930
gid = pwd.getpwnam(group).pw_gid
1304
2932
except KeyError:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1314
except OSError, error:
1315
if error[0] != errno.EPERM:
2941
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2943
except OSError as error:
2944
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2945
.format(uid, gid, os.strerror(error.errno)))
2946
if error.errno != errno.EPERM:
1318
# Enable all possible GnuTLS debugging
2950
# Enable all possible GnuTLS debugging
1320
2952
# "Use a log level over 10 to enable all debugging options."
1321
2953
# - GnuTLS manual
1322
gnutls.library.functions.gnutls_global_set_log_level(11)
2954
gnutls.global_set_log_level(11)
1324
@gnutls.library.types.gnutls_log_func
1325
2957
def debug_gnutls(level, string):
1326
logger.debug(u"GnuTLS: %s", string[:-1])
1328
(gnutls.library.functions
1329
.gnutls_global_set_log_function(debug_gnutls))
2958
logger.debug("GnuTLS: %s", string[:-1])
2960
gnutls.global_set_log_function(debug_gnutls)
2962
# Redirect stdin so all checkers get /dev/null
2963
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2964
os.dup2(null, sys.stdin.fileno())
2968
# Need to fork before connecting to D-Bus
2970
# Close all input and output, do double fork, etc.
2973
# multiprocessing will use threads, so before we use GObject we
2974
# need to inform GObject that threads will be used.
2975
GObject.threads_init()
1331
2977
global main_loop
1332
2978
# From the Avahi example code
1333
DBusGMainLoop(set_as_default=True )
1334
main_loop = gobject.MainLoop()
2979
DBusGMainLoop(set_as_default=True)
2980
main_loop = GObject.MainLoop()
1335
2981
bus = dbus.SystemBus()
1336
2982
# End of Avahi example code
1338
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1340
service = AvahiService(name = server_settings[u"servicename"],
1341
servicetype = u"_mandos._tcp",
1342
protocol = protocol, bus = bus)
1343
if server_settings["interface"]:
1344
service.interface = (if_nametoindex
1345
(str(server_settings[u"interface"])))
2985
bus_name = dbus.service.BusName("se.recompile.Mandos",
2988
old_bus_name = dbus.service.BusName(
2989
"se.bsnet.fukt.Mandos", bus,
2991
except dbus.exceptions.DBusException as e:
2992
logger.error("Disabling D-Bus:", exc_info=e)
2994
server_settings["use_dbus"] = False
2995
tcp_server.use_dbus = False
2997
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2998
service = AvahiServiceToSyslog(
2999
name = server_settings["servicename"],
3000
servicetype = "_mandos._tcp",
3001
protocol = protocol,
3003
if server_settings["interface"]:
3004
service.interface = if_nametoindex(
3005
server_settings["interface"].encode("utf-8"))
3007
global multiprocessing_manager
3008
multiprocessing_manager = multiprocessing.Manager()
1347
3010
client_class = Client
1349
3012
client_class = functools.partial(ClientDBus, bus = bus)
1350
tcp_server.clients.update(set(
1351
client_class(name = section,
1352
config= dict(client_config.items(section)))
1353
for section in client_config.sections()))
3014
client_settings = Client.config_parser(client_config)
3015
old_client_settings = {}
3018
# This is used to redirect stdout and stderr for checker processes
3020
wnull = open(os.devnull, "w") # A writable /dev/null
3021
# Only used if server is running in foreground but not in debug
3023
if debug or not foreground:
3026
# Get client data and settings from last running state.
3027
if server_settings["restore"]:
3029
with open(stored_state_path, "rb") as stored_state:
3030
clients_data, old_client_settings = pickle.load(
3032
os.remove(stored_state_path)
3033
except IOError as e:
3034
if e.errno == errno.ENOENT:
3035
logger.warning("Could not load persistent state:"
3036
" {}".format(os.strerror(e.errno)))
3038
logger.critical("Could not load persistent state:",
3041
except EOFError as e:
3042
logger.warning("Could not load persistent state: "
3046
with PGPEngine() as pgp:
3047
for client_name, client in clients_data.items():
3048
# Skip removed clients
3049
if client_name not in client_settings:
3052
# Decide which value to use after restoring saved state.
3053
# We have three different values: Old config file,
3054
# new config file, and saved state.
3055
# New config value takes precedence if it differs from old
3056
# config value, otherwise use saved state.
3057
for name, value in client_settings[client_name].items():
3059
# For each value in new config, check if it
3060
# differs from the old config value (Except for
3061
# the "secret" attribute)
3062
if (name != "secret"
3064
old_client_settings[client_name][name])):
3065
client[name] = value
3069
# Clients who has passed its expire date can still be
3070
# enabled if its last checker was successful. A Client
3071
# whose checker succeeded before we stored its state is
3072
# assumed to have successfully run all checkers during
3074
if client["enabled"]:
3075
if datetime.datetime.utcnow() >= client["expires"]:
3076
if not client["last_checked_ok"]:
3078
"disabling client {} - Client never "
3079
"performed a successful checker".format(
3081
client["enabled"] = False
3082
elif client["last_checker_status"] != 0:
3084
"disabling client {} - Client last"
3085
" checker failed with error code"
3088
client["last_checker_status"]))
3089
client["enabled"] = False
3091
client["expires"] = (
3092
datetime.datetime.utcnow()
3093
+ client["timeout"])
3094
logger.debug("Last checker succeeded,"
3095
" keeping {} enabled".format(
3098
client["secret"] = pgp.decrypt(
3099
client["encrypted_secret"],
3100
client_settings[client_name]["secret"])
3102
# If decryption fails, we use secret from new settings
3103
logger.debug("Failed to decrypt {} old secret".format(
3105
client["secret"] = (client_settings[client_name]
3108
# Add/remove clients based on new changes made to config
3109
for client_name in (set(old_client_settings)
3110
- set(client_settings)):
3111
del clients_data[client_name]
3112
for client_name in (set(client_settings)
3113
- set(old_client_settings)):
3114
clients_data[client_name] = client_settings[client_name]
3116
# Create all client objects
3117
for client_name, client in clients_data.items():
3118
tcp_server.clients[client_name] = client_class(
3121
server_settings = server_settings)
1354
3123
if not tcp_server.clients:
1355
logger.warning(u"No clients defined")
1358
# Redirect stdin so all checkers get /dev/null
1359
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1360
os.dup2(null, sys.stdin.fileno())
1364
# No console logging
1365
logger.removeHandler(console)
1366
# Close all input and output, do double fork, etc.
1370
with closing(pidfile):
3124
logger.warning("No clients defined")
3127
if pidfile is not None:
1371
3128
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
3131
print(pid, file=pidfile)
3133
logger.error("Could not write to file %r with PID %d",
1375
logger.error(u"Could not write to file %r with PID %d",
1378
# "pidfile" was never created
1383
"Cleanup function; run on exit"
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1388
client.disable_hook = None
1391
atexit.register(cleanup)
1394
signal.signal(signal.SIGINT, signal.SIG_IGN)
1395
3138
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1396
3139
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1399
class MandosDBusService(dbus.service.Object):
3143
@alternate_dbus_interfaces(
3144
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3145
class MandosDBusService(DBusObjectWithObjectManager):
1400
3146
"""A D-Bus proxy object"""
1401
3148
def __init__(self):
1402
dbus.service.Object.__init__(self, bus, u"/")
1403
_interface = u"se.bsnet.fukt.Mandos"
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1406
def ClientAdded(self, objpath, properties):
1410
@dbus.service.signal(_interface, signature=u"s")
1411
def ClientNotFound(self, fingerprint):
1415
@dbus.service.signal(_interface, signature=u"os")
3149
dbus.service.Object.__init__(self, bus, "/")
3151
_interface = "se.recompile.Mandos"
3153
@dbus.service.signal(_interface, signature="o")
3154
def ClientAdded(self, objpath):
3158
@dbus.service.signal(_interface, signature="ss")
3159
def ClientNotFound(self, fingerprint, address):
3163
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3165
@dbus.service.signal(_interface, signature="os")
1416
3166
def ClientRemoved(self, objpath, name):
1420
@dbus.service.method(_interface, out_signature=u"ao")
3170
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3172
@dbus.service.method(_interface, out_signature="ao")
1421
3173
def GetAllClients(self):
1423
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
3175
return dbus.Array(c.dbus_object_path for c in
3176
tcp_server.clients.itervalues())
3178
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1426
3180
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
3181
out_signature="a{oa{sv}}")
1428
3182
def GetAllClientsWithProperties(self):
1430
3184
return dbus.Dictionary(
1431
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
3185
{ c.dbus_object_path: c.GetAll(
3186
"se.recompile.Mandos.Client")
3187
for c in tcp_server.clients.itervalues() },
1435
@dbus.service.method(_interface, in_signature=u"o")
3190
@dbus.service.method(_interface, in_signature="o")
1436
3191
def RemoveClient(self, object_path):
1438
for c in tcp_server.clients:
3193
for c in tcp_server.clients.itervalues():
1439
3194
if c.dbus_object_path == object_path:
1440
tcp_server.clients.remove(c)
3195
del tcp_server.clients[c.name]
1441
3196
c.remove_from_connection()
1442
# Don't signal anything except ClientRemoved
1443
c.disable(signal=False)
1445
self.ClientRemoved(object_path, c.name)
3197
# Don't signal the disabling
3198
c.disable(quiet=True)
3199
# Emit D-Bus signal for removal
3200
self.client_removed_signal(c)
3202
raise KeyError(object_path)
3206
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3207
out_signature = "a{oa{sa{sv}}}")
3208
def GetManagedObjects(self):
3210
return dbus.Dictionary(
3211
{ client.dbus_object_path:
3213
{ interface: client.GetAll(interface)
3215
client._get_all_interface_names()})
3216
for client in tcp_server.clients.values()})
3218
def client_added_signal(self, client):
3219
"""Send the new standard signal and the old signal"""
3221
# New standard signal
3222
self.InterfacesAdded(
3223
client.dbus_object_path,
3225
{ interface: client.GetAll(interface)
3227
client._get_all_interface_names()}))
3229
self.ClientAdded(client.dbus_object_path)
3231
def client_removed_signal(self, client):
3232
"""Send the new standard signal and the old signal"""
3234
# New standard signal
3235
self.InterfacesRemoved(
3236
client.dbus_object_path,
3237
client._get_all_interface_names())
3239
self.ClientRemoved(client.dbus_object_path,
1451
3242
mandos_dbus_service = MandosDBusService()
1453
for client in tcp_server.clients:
3245
"Cleanup function; run on exit"
3249
multiprocessing.active_children()
3251
if not (tcp_server.clients or client_settings):
3254
# Store client before exiting. Secrets are encrypted with key
3255
# based on what config file has. If config file is
3256
# removed/edited, old secret will thus be unrecovable.
3258
with PGPEngine() as pgp:
3259
for client in tcp_server.clients.itervalues():
3260
key = client_settings[client.name]["secret"]
3261
client.encrypted_secret = pgp.encrypt(client.secret,
3265
# A list of attributes that can not be pickled
3267
exclude = { "bus", "changedstate", "secret",
3268
"checker", "server_settings" }
3269
for name, typ in inspect.getmembers(dbus.service
3273
client_dict["encrypted_secret"] = (client
3275
for attr in client.client_structure:
3276
if attr not in exclude:
3277
client_dict[attr] = getattr(client, attr)
3279
clients[client.name] = client_dict
3280
del client_settings[client.name]["secret"]
3283
with tempfile.NamedTemporaryFile(
3287
dir=os.path.dirname(stored_state_path),
3288
delete=False) as stored_state:
3289
pickle.dump((clients, client_settings), stored_state)
3290
tempname = stored_state.name
3291
os.rename(tempname, stored_state_path)
3292
except (IOError, OSError) as e:
3298
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3299
logger.warning("Could not save persistent state: {}"
3300
.format(os.strerror(e.errno)))
3302
logger.warning("Could not save persistent state:",
3306
# Delete all clients, and settings from config
3307
while tcp_server.clients:
3308
name, client = tcp_server.clients.popitem()
3310
client.remove_from_connection()
3311
# Don't signal the disabling
3312
client.disable(quiet=True)
3313
# Emit D-Bus signal for removal
3315
mandos_dbus_service.client_removed_signal(client)
3316
client_settings.clear()
3318
atexit.register(cleanup)
3320
for client in tcp_server.clients.itervalues():
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
3322
# Emit D-Bus signal for adding
3323
mandos_dbus_service.client_added_signal(client)
3324
# Need to initiate checking of clients
3326
client.init_checker()
1460
3328
tcp_server.enable()
1461
3329
tcp_server.server_activate()
1463
3331
# Find out what port we got
1464
service.port = tcp_server.socket.getsockname()[1]
3333
service.port = tcp_server.socket.getsockname()[1]
1466
logger.info(u"Now listening on address %r, port %d,"
1467
" flowinfo %d, scope_id %d"
1468
% tcp_server.socket.getsockname())
3335
logger.info("Now listening on address %r, port %d,"
3336
" flowinfo %d, scope_id %d",
3337
*tcp_server.socket.getsockname())
1470
logger.info(u"Now listening on address %r, port %d"
1471
% tcp_server.socket.getsockname())
3339
logger.info("Now listening on address %r, port %d",
3340
*tcp_server.socket.getsockname())
1473
3342
#service.interface = tcp_server.socket.getsockname()[3]
1476
# From the Avahi example code
1479
except dbus.exceptions.DBusException, error:
1480
logger.critical(u"DBusException: %s", error)
1482
# End of Avahi example code
3346
# From the Avahi example code
3349
except dbus.exceptions.DBusException as error:
3350
logger.critical("D-Bus Exception", exc_info=error)
3353
# End of Avahi example code
1484
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3355
GObject.io_add_watch(tcp_server.fileno(), GObject.IO_IN,
1485
3356
lambda *args, **kwargs:
1486
3357
(tcp_server.handle_request
1487
3358
(*args[2:], **kwargs) or True))
1489
logger.debug(u"Starting main loop")
3360
logger.debug("Starting main loop")
1490
3361
main_loop.run()
1491
except AvahiError, error:
1492
logger.critical(u"AvahiError: %s", error)
3362
except AvahiError as error:
3363
logger.critical("Avahi Error", exc_info=error)
1494
3366
except KeyboardInterrupt:
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
3368
print("", file=sys.stderr)
3369
logger.debug("Server received KeyboardInterrupt")
3370
logger.debug("Server exiting")
3371
# Must run before the D-Bus bus name gets deregistered
1500
3375
if __name__ == '__main__':