81
95
except ImportError:
82
96
SO_BINDTODEVICE = None
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
95
logger.addHandler(syslogger)
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
101
logger.addHandler(console)
98
if sys.version_info.major == 2:
102
stored_state_file = "clients.pickle"
104
logger = logging.getLogger()
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
110
except (OSError, AttributeError):
112
def if_nametoindex(interface):
113
"Get an interface index the hard way, i.e. using fcntl()"
114
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
115
with contextlib.closing(socket.socket()) as s:
116
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
119
return interface_index
122
def initlogger(debug, level=logging.WARNING):
123
"""init logger and add loglevel"""
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
129
syslogger.setFormatter(logging.Formatter
130
('Mandos [%(process)d]: %(levelname)s:'
132
logger.addHandler(syslogger)
135
console = logging.StreamHandler()
136
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
140
logger.addHandler(console)
141
logger.setLevel(level)
144
class PGPError(Exception):
145
"""Exception if encryption/decryption fails"""
149
class PGPEngine(object):
150
"""A simple class for OpenPGP symmetric encryption & decryption"""
153
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
156
output = subprocess.check_output(["gpgconf"])
157
for line in output.splitlines():
158
name, text, path = line.split(":")
163
if e.errno != errno.ENOENT:
165
self.gnupgargs = ['--batch',
166
'--homedir', self.tempdir,
174
def __exit__(self, exc_type, exc_value, traceback):
182
if self.tempdir is not None:
183
# Delete contents of tempdir
184
for root, dirs, files in os.walk(self.tempdir,
186
for filename in files:
187
os.remove(os.path.join(root, filename))
189
os.rmdir(os.path.join(root, dirname))
191
os.rmdir(self.tempdir)
194
def password_encode(self, password):
195
# Passphrase can not be empty and can not contain newlines or
196
# NUL bytes. So we prefix it and hex encode it.
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
205
def encrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
211
proc = subprocess.Popen([self.gpg, '--symmetric',
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
223
def decrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
229
proc = subprocess.Popen([self.gpg, '--decrypt',
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
239
return decrypted_plaintext
103
242
class AvahiError(Exception):
104
243
def __init__(self, value, *args, **kwargs):
105
244
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
245
return super(AvahiError, self).__init__(value, *args,
110
249
class AvahiServiceError(AvahiError):
113
253
class AvahiGroupError(AvahiError):
260
427
follow_name_owner_changes=True),
261
428
avahi.DBUS_INTERFACE_SERVER)
262
429
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
430
self.server_state_changed)
264
431
self.server_state_changed(self.server.GetState())
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
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))
273
708
class Client(object):
274
709
"""A representation of a client host served by this server.
277
_approved: bool(); 'None' if not yet approved/disapproved
712
approved: bool(); 'None' if not yet approved/disapproved
278
713
approval_delay: datetime.timedelta(); Time to wait for approval
279
714
approval_duration: datetime.timedelta(); Duration of one approval
280
715
checker: subprocess.Popen(); a running checker process used
297
733
interval: datetime.timedelta(); How often to start a new checker
298
734
last_approval_request: datetime.datetime(); (UTC) or None
299
735
last_checked_ok: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
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
301
742
name: string; from the config file, used in log messages and
302
743
D-Bus identifiers
303
744
secret: bytestring; sent verbatim (over TLS) to client
304
745
timeout: datetime.timedelta(); How long from last_checked_ok
305
746
until this client is disabled
306
extended_timeout: extra long timeout when password has been sent
747
extended_timeout: extra long timeout when secret has been sent
307
748
runtime_expansions: Allowed attributes for runtime expansion.
308
749
expires: datetime.datetime(); time (UTC) when a client will be
309
750
disabled, or None
751
server_settings: The server_settings dict from main()
312
754
runtime_expansions = ("approval_delay", "approval_duration",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
315
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",
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
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
821
def __init__(self, settings, name = None, server_settings=None):
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()
837
self.last_enabled = None
339
840
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
343
self.fingerprint = (config["fingerprint"].upper()
345
841
logger.debug(" Fingerprint: %s", self.fingerprint)
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
352
self.secret = secfile.read()
354
raise TypeError("No secret or secfile for client %s"
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
842
self.created = settings.get("created",
843
datetime.datetime.utcnow())
845
# attributes specific for this server instance
366
846
self.checker = None
367
847
self.checker_initiator_tag = None
368
848
self.disable_initiator_tag = None
370
849
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
372
850
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
377
852
self.approvals_pending = 0
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
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
384
866
def send_changedstate(self):
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
867
with self.changedstate:
868
self.changedstate.notify_all()
389
870
def enable(self):
390
871
"""Start this client's checker and timeout hooks"""
391
872
if getattr(self, "enabled", False):
392
873
# Already enabled
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
400
# Schedule a disable() when 'timeout' has passed
401
875
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
405
876
self.enabled = True
406
877
self.last_enabled = datetime.datetime.utcnow()
407
# Also start a new checker *right now*.
879
self.send_changedstate()
410
881
def disable(self, quiet=True):
411
882
"""Disable this client."""
412
883
if not getattr(self, "enabled", False):
415
self.send_changedstate()
417
886
logger.info("Disabling client %s", self.name)
418
if getattr(self, "disable_initiator_tag", False):
887
if getattr(self, "disable_initiator_tag", None) is not None:
419
888
gobject.source_remove(self.disable_initiator_tag)
420
889
self.disable_initiator_tag = None
421
890
self.expires = None
422
if getattr(self, "checker_initiator_tag", False):
891
if getattr(self, "checker_initiator_tag", None) is not None:
423
892
gobject.source_remove(self.checker_initiator_tag)
424
893
self.checker_initiator_tag = None
425
894
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
428
895
self.enabled = False
897
self.send_changedstate()
429
898
# Do not run this again if called by a gobject.timeout_add
432
901
def __del__(self):
433
self.disable_hook = None
436
def checker_callback(self, pid, condition, command):
904
def init_checker(self):
905
# Schedule a new checker to be started an 'interval' from now,
906
# and every interval from then on.
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)
917
# Also start a new checker *right now*.
920
def checker_callback(self, source, condition, connection,
437
922
"""The checker has completed, so take appropriate actions."""
438
923
self.checker_callback_tag = None
439
924
self.checker = None
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
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:
443
933
logger.info("Checker for %(name)s succeeded",
445
935
self.checked_ok()
447
logger.info("Checker for %(name)s failed",
937
logger.info("Checker for %(name)s failed", vars(self))
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
450
941
logger.warning("Checker for %(name)s crashed?",
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
456
This should only be called when the client has been seen,
945
def checked_ok(self):
946
"""Assert that the client has been seen, alive and well."""
947
self.last_checked_ok = datetime.datetime.utcnow()
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."""
459
954
if timeout is None:
460
955
timeout = self.timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(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
468
964
def need_approval(self):
469
965
self.last_approval_request = datetime.datetime.utcnow()
474
970
If a checker already exists, leave it running and do
476
972
# The reason for not killing a running checker is that if we
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# 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
481
977
# checkers alone, the checker would have to take more time
482
978
# than 'timeout' for the client to be disabled, which is as it
485
# If a checker exists, make sure it is not a zombie
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
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")
498
985
# Start a new checker if needed
499
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 }
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
504
# Escape attributes for the shell
505
escaped_attrs = dict(
507
re.escape(unicode(str(getattr(self, attr, "")),
511
self.runtime_expansions)
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
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
519
998
self.current_checker_command = command
521
logger.info("Starting checker %r for %s",
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
530
self.checker_callback_tag = (gobject.child_watch_add
532
self.checker_callback,
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
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)
543
1024
# Re-run this periodically if run by gobject.timeout_add
613
class DBusObjectWithProperties(dbus.service.Object):
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):
614
1224
"""A D-Bus object with properties.
616
1226
Classes inheriting from this can use the dbus_service_property
617
1227
decorator to expose methods as D-Bus properties. It exposes the
618
1228
standard Get(), Set(), and GetAll() methods on the D-Bus.
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
625
def _get_all_dbus_properties(self):
626
"""Returns a generator of (name, attribute) pairs
628
return ((prop._dbus_name, prop)
630
inspect.getmembers(self, self._is_dbus_property))
632
1231
def _get_dbus_property(self, interface_name, property_name):
633
1232
"""Returns a bound method if one exists which is a D-Bus
634
1233
property with the specified name and interface.
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_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)
646
1242
# No such property
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
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,
652
1257
out_signature="v")
653
1258
def Get(self, interface_name, property_name):
654
1259
"""Standard D-Bus property Get() method, see D-Bus standard.
698
1306
if not hasattr(value, "variant_level"):
1307
properties[name] = value
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
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
705
1321
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
706
1322
out_signature="s",
707
1323
path_keyword='object_path',
708
1324
connection_keyword='connection')
709
1325
def Introspect(self, object_path, connection):
710
"""Standard D-Bus method, overloaded to insert property tags.
1326
"""Overloading of standard D-Bus method.
1328
Inserts property tags and interface annotation tags.
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
715
1334
document = xml.dom.minidom.parseString(xmlstring)
716
1336
def make_tag(document, name, prop):
717
1337
e = document.createElement("property")
718
1338
e.setAttribute("name", name)
719
1339
e.setAttribute("type", prop._dbus_signature)
720
1340
e.setAttribute("access", prop._dbus_access)
722
1343
for if_tag in document.getElementsByTagName("interface"):
723
1345
for tag in (make_tag(document, name, prop)
725
in self._get_all_dbus_properties()
1347
in self._get_all_dbus_things("property")
726
1348
if prop._dbus_interface
727
1349
== if_tag.getAttribute("name")):
728
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)
729
1367
# Add the names to the return values for the
730
1368
# "org.freedesktop.DBus.Properties" methods
731
1369
if (if_tag.getAttribute("name")
746
1384
except (AttributeError, xml.dom.DOMException,
747
1385
xml.parsers.expat.ExpatError) as error:
748
1386
logger.error("Failed to override Introspection method",
753
def datetime_to_dbus (dt, variant_level=0):
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):
754
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
756
1462
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
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"})
760
1654
class ClientDBus(Client, DBusObjectWithProperties):
761
1655
"""A Client class using D-Bus
768
1662
runtime_expansions = (Client.runtime_expansions
769
+ ("dbus_object_path",))
1663
+ ("dbus_object_path", ))
1665
_interface = "se.recompile.Mandos.Client"
771
1667
# dbus.service.Object doesn't use super(), so we can't either.
773
1669
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
776
1671
Client.__init__(self, *args, **kwargs)
777
1672
# Only now, when this client is initialized, can it show up on
779
client_object_name = unicode(self.name).translate(
1674
client_object_name = str(self.name).translate(
780
1675
{ord("."): ord("_"),
781
1676
ord("-"): ord("_")})
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
784
1679
DBusObjectWithProperties.__init__(self, self.bus,
785
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.
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
790
""" Modify a variable so that its a property that announce its
792
transform_fun: Function that takes a value and transform it to
794
dbus_name: DBus name of the variable
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
795
1693
type_func: Function that transform the value before sending it
797
variant_level: DBus variant level. default: 1
1694
to the D-Bus. Default: no transform
1695
variant_level: D-Bus variant level. Default: 1
1697
attrname = "_{}".format(dbus_name)
800
1699
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
803
1700
if hasattr(self, "dbus_object_path"):
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
807
self.PropertyChanged(dbus.String(dbus_name),
810
return property(lambda self: real_value[0], setter)
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)
813
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
814
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
815
1725
"ApprovalPending",
817
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
818
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
822
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
823
1734
"LastCheckedOK")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1737
last_approval_request = notifychangeproperty(
1738
datetime_to_dbus, "LastApprovalRequest")
826
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
827
1740
"ApprovedByDefault")
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
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)
832
1747
host = notifychangeproperty(dbus.String, "Host")
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
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)
839
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
841
1761
del notifychangeproperty
1064
2005
return datetime_to_dbus(self.last_approval_request)
1066
2007
# Timeout - property
1067
@dbus_service_property(_interface, signature="t",
2008
@dbus_service_property(_interface,
1068
2010
access="readwrite")
1069
2011
def Timeout_dbus_property(self, value=None):
1070
2012
if value is None: # get
1071
return dbus.UInt64(self.timeout_milliseconds())
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
1072
2015
self.timeout = datetime.timedelta(0, 0, 0, value)
1073
if getattr(self, "disable_initiator_tag", None) is None:
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1085
if time_to_die <= 0:
1086
# The timeout has passed
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
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),
1094
2032
# ExtendedTimeout - property
1095
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
1096
2035
access="readwrite")
1097
2036
def ExtendedTimeout_dbus_property(self, value=None):
1098
2037
if value is None: # get
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
1100
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1102
2042
# Interval - property
1103
@dbus_service_property(_interface, signature="t",
2043
@dbus_service_property(_interface,
1104
2045
access="readwrite")
1105
2046
def Interval_dbus_property(self, value=None):
1106
2047
if value is None: # get
1107
return dbus.UInt64(self.interval_milliseconds())
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1108
2049
self.interval = datetime.timedelta(0, 0, 0, value)
1109
2050
if getattr(self, "checker_initiator_tag", None) is None:
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
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
1117
2059
# Checker - property
1118
@dbus_service_property(_interface, signature="s",
2060
@dbus_service_property(_interface,
1119
2062
access="readwrite")
1120
2063
def Checker_dbus_property(self, value=None):
1121
2064
if value is None: # get
1122
2065
return dbus.String(self.checker_command)
1123
self.checker_command = value
2066
self.checker_command = str(value)
1125
2068
# CheckerRunning - property
1126
@dbus_service_property(_interface, signature="b",
2069
@dbus_service_property(_interface,
1127
2071
access="readwrite")
1128
2072
def CheckerRunning_dbus_property(self, value=None):
1129
2073
if value is None: # get
1352
2288
def fingerprint(openpgp):
1353
2289
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1354
2290
# New GnuTLS "datum" with the OpenPGP public key
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1359
ctypes.c_uint(len(openpgp))))
2291
datum = gnutls.datum_t(
2292
ctypes.cast(ctypes.c_char_p(openpgp),
2293
ctypes.POINTER(ctypes.c_ubyte)),
2294
ctypes.c_uint(len(openpgp)))
1360
2295
# New empty GnuTLS certificate
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1364
2298
# Import the OpenPGP public key into the certificate
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1369
2301
# Verify the self signature in the key
1370
2302
crtverify = ctypes.c_uint()
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1374
2305
if crtverify.value != 0:
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1378
2308
# New buffer for the fingerprint
1379
2309
buf = ctypes.create_string_buffer(20)
1380
2310
buf_len = ctypes.c_size_t()
1381
2311
# Get the fingerprint from the certificate into the buffer
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1385
2314
# Deinit the certificate
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2315
gnutls.openpgp_crt_deinit(crt)
1387
2316
# Convert the buffer to a Python bytestring
1388
2317
fpr = ctypes.string_at(buf, buf_len.value)
1389
2318
# Convert the bytestring to hexadecimal notation
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2319
hex_fpr = binascii.hexlify(fpr).upper()
1394
2323
class MultiprocessingMixIn(object):
1395
2324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1396
2326
def sub_process_main(self, request, address):
1398
2328
self.finish_request(request, address)
1400
2330
self.handle_error(request, address)
1401
2331
self.close_request(request)
1403
2333
def process_request(self, request, address):
1404
2334
"""Start a new process to process the request."""
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
1408
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1409
2342
""" adds a pipe to the MixIn """
1410
2344
def process_request(self, request, client_address):
1411
2345
"""Overrides and wraps the original process_request().
1413
2347
This function creates a new pipe in self.pipe
1415
2349
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2351
proc = MultiprocessingMixIn.process_request(self, request,
1419
2353
self.child_pipe.close()
1420
self.add_pipe(parent_pipe)
1422
def add_pipe(self, parent_pipe):
2354
self.add_pipe(parent_pipe, proc)
2356
def add_pipe(self, parent_pipe, proc):
1423
2357
"""Dummy function; override as necessary"""
1424
raise NotImplementedError
2358
raise NotImplementedError()
1426
2361
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1427
2362
socketserver.TCPServer, object):
1558
2527
"dress: %s", fpr, address)
1559
2528
if self.use_dbus:
1560
2529
# Emit D-Bus signal
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2530
mandos_dbus_service.ClientNotFound(fpr,
1562
2532
parent_pipe.send(False)
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
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))
1570
2542
parent_pipe.send(True)
1571
# remove the old hook in favor of the new above hook on same fileno
2543
# remove the old hook in favor of the new above hook on
1573
2546
if command == 'funcall':
1574
2547
funcname = request[1]
1575
2548
args = request[2]
1576
2549
kwargs = request[3]
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2551
parent_pipe.send(('data', getattr(client_object,
1580
2555
if command == 'getattr':
1581
2556
attrname = request[1]
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2562
'data', client_object.__getattribute__(attrname)))
1587
2564
if command == 'setattr':
1588
2565
attrname = request[1]
1589
2566
value = request[2]
1590
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
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
1595
2668
def string_to_delta(interval):
1596
2669
"""Parse a string and return a datetime.timedelta
1729
2799
"debug": "False",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
1732
2803
"servicename": "Mandos",
1733
2804
"use_dbus": "True",
1734
2805
"use_ipv6": "True",
1735
2806
"debuglevel": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
1738
2814
# Parse config file for server-global settings
1739
2815
server_config = configparser.SafeConfigParser(server_defaults)
1740
2816
del server_defaults
1741
server_config.read(os.path.join(options.configdir,
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1743
2818
# Convert the SafeConfigParser object to a dict
1744
2819
server_settings = server_config.defaults()
1745
2820
# Use the appropriate methods on the non-string config options
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1747
2822
server_settings[option] = server_config.getboolean("DEFAULT",
1749
2824
if server_settings["port"]:
1750
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
1752
2836
del server_config
1754
2838
# Override the settings from the config file with command line
1755
2839
# options, if set.
1756
2840
for option in ("interface", "address", "port", "debug",
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
1759
2844
value = getattr(options, option)
1760
2845
if value is not None:
1761
2846
server_settings[option] = value
1763
2848
# Force all strings to be unicode
1764
2849
for option in server_settings.keys():
1765
if type(server_settings[option]) is str:
1766
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
1767
2860
# Now we have our good server settings in "server_settings"
1769
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")
1771
2869
# For convenience
1772
2870
debug = server_settings["debug"]
1773
2871
debuglevel = server_settings["debuglevel"]
1774
2872
use_dbus = server_settings["use_dbus"]
1775
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)
1777
2888
if server_settings["servicename"] != "Mandos":
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
1783
2894
# Parse config file with clients
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1787
"checker": "fping -q -- %%(host)s",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1792
client_config = configparser.SafeConfigParser(client_defaults)
2895
client_config = configparser.SafeConfigParser(Client
1793
2897
client_config.read(os.path.join(server_settings["configdir"],
1794
2898
"clients.conf"))
1796
2900
global mandos_dbus_service
1797
2901
mandos_dbus_service = None
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1802
interface=(server_settings["interface"]
1806
server_settings["priority"],
1809
pidfilename = "/var/run/mandos.pid"
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"
1811
pidfile = open(pidfilename, "w")
1813
logger.error("Could not open file %r", pidfilename)
2920
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2921
except IOError as e:
2922
logger.error("Could not open file %r", pidfilename,
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
2925
for name in ("_mandos", "mandos", "nobody"):
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2927
uid = pwd.getpwnam(name).pw_uid
2928
gid = pwd.getpwnam(name).pw_gid
1822
2930
except KeyError:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1832
2938
except OSError as error:
1833
if error[0] != errno.EPERM:
2939
if error.errno != errno.EPERM:
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
1845
2943
# Enable all possible GnuTLS debugging
1847
2945
# "Use a log level over 10 to enable all debugging options."
1848
2946
# - GnuTLS manual
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
2947
gnutls.global_set_log_level(11)
1851
@gnutls.library.types.gnutls_log_func
1852
2950
def debug_gnutls(level, string):
1853
2951
logger.debug("GnuTLS: %s", string[:-1])
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
2953
gnutls.global_set_log_function(debug_gnutls)
1858
2955
# Redirect stdin so all checkers get /dev/null
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2956
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1860
2957
os.dup2(null, sys.stdin.fileno())
1864
# No console logging
1865
logger.removeHandler(console)
1867
2961
# Need to fork before connecting to D-Bus
1869
2963
# Close all input and output, do double fork, etc.
2966
# multiprocessing will use threads, so before we use gobject we
2967
# need to inform gobject that threads will be used.
2968
gobject.threads_init()
1872
2970
global main_loop
1873
2971
# From the Avahi example code
1874
DBusGMainLoop(set_as_default=True )
2972
DBusGMainLoop(set_as_default=True)
1875
2973
main_loop = gobject.MainLoop()
1876
2974
bus = dbus.SystemBus()
1877
2975
# End of Avahi example code
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
2978
bus_name = dbus.service.BusName("se.recompile.Mandos",
2981
old_bus_name = dbus.service.BusName(
2982
"se.bsnet.fukt.Mandos", bus,
2984
except dbus.exceptions.DBusException as e:
2985
logger.error("Disabling D-Bus:", exc_info=e)
1884
2986
use_dbus = False
1885
2987
server_settings["use_dbus"] = False
1886
2988
tcp_server.use_dbus = False
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
2990
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2991
service = AvahiServiceToSyslog(
2992
name = server_settings["servicename"],
2993
servicetype = "_mandos._tcp",
2994
protocol = protocol,
2996
if server_settings["interface"]:
2997
service.interface = if_nametoindex(
2998
server_settings["interface"].encode("utf-8"))
1895
3000
global multiprocessing_manager
1896
3001
multiprocessing_manager = multiprocessing.Manager()
1898
3003
client_class = Client
1900
3005
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1907
for name, value in config.items(section):
3007
client_settings = Client.config_parser(client_config)
3008
old_client_settings = {}
3011
# This is used to redirect stdout and stderr for checker processes
3013
wnull = open(os.devnull, "w") # A writable /dev/null
3014
# Only used if server is running in foreground but not in debug
3016
if debug or not foreground:
3019
# Get client data and settings from last running state.
3020
if server_settings["restore"]:
3022
with open(stored_state_path, "rb") as stored_state:
3023
clients_data, old_client_settings = pickle.load(
3025
os.remove(stored_state_path)
3026
except IOError as e:
3027
if e.errno == errno.ENOENT:
3028
logger.warning("Could not load persistent state:"
3029
" {}".format(os.strerror(e.errno)))
3031
logger.critical("Could not load persistent state:",
3034
except EOFError as e:
3035
logger.warning("Could not load persistent state: "
3039
with PGPEngine() as pgp:
3040
for client_name, client in clients_data.items():
3041
# Skip removed clients
3042
if client_name not in client_settings:
3045
# Decide which value to use after restoring saved state.
3046
# We have three different values: Old config file,
3047
# new config file, and saved state.
3048
# New config value takes precedence if it differs from old
3049
# config value, otherwise use saved state.
3050
for name, value in client_settings[client_name].items():
3052
# For each value in new config, check if it
3053
# differs from the old config value (Except for
3054
# the "secret" attribute)
3055
if (name != "secret"
3057
old_client_settings[client_name][name])):
3058
client[name] = value
3062
# Clients who has passed its expire date can still be
3063
# enabled if its last checker was successful. A Client
3064
# whose checker succeeded before we stored its state is
3065
# assumed to have successfully run all checkers during
3067
if client["enabled"]:
3068
if datetime.datetime.utcnow() >= client["expires"]:
3069
if not client["last_checked_ok"]:
3071
"disabling client {} - Client never "
3072
"performed a successful checker".format(
3074
client["enabled"] = False
3075
elif client["last_checker_status"] != 0:
3077
"disabling client {} - Client last"
3078
" checker failed with error code"
3081
client["last_checker_status"]))
3082
client["enabled"] = False
3084
client["expires"] = (
3085
datetime.datetime.utcnow()
3086
+ client["timeout"])
3087
logger.debug("Last checker succeeded,"
3088
" keeping {} enabled".format(
1909
yield (name, special_settings[name]())
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3091
client["secret"] = pgp.decrypt(
3092
client["encrypted_secret"],
3093
client_settings[client_name]["secret"])
3095
# If decryption fails, we use secret from new settings
3096
logger.debug("Failed to decrypt {} old secret".format(
3098
client["secret"] = (client_settings[client_name]
3101
# Add/remove clients based on new changes made to config
3102
for client_name in (set(old_client_settings)
3103
- set(client_settings)):
3104
del clients_data[client_name]
3105
for client_name in (set(client_settings)
3106
- set(old_client_settings)):
3107
clients_data[client_name] = client_settings[client_name]
3109
# Create all client objects
3110
for client_name, client in clients_data.items():
3111
tcp_server.clients[client_name] = client_class(
3114
server_settings = server_settings)
1918
3116
if not tcp_server.clients:
1919
3117
logger.warning("No clients defined")
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1928
logger.error("Could not write to file %r with PID %d",
1931
# "pidfile" was never created
3120
if pidfile is not None:
3124
print(pid, file=pidfile)
3126
logger.error("Could not write to file %r with PID %d",
1933
3129
del pidfilename
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1937
3131
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
3132
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1941
class MandosDBusService(dbus.service.Object):
3136
@alternate_dbus_interfaces(
3137
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3138
class MandosDBusService(DBusObjectWithObjectManager):
1942
3139
"""A D-Bus proxy object"""
1943
3141
def __init__(self):
1944
3142
dbus.service.Object.__init__(self, bus, "/")
1945
_interface = "se.bsnet.fukt.Mandos"
3144
_interface = "se.recompile.Mandos"
1947
3146
@dbus.service.signal(_interface, signature="o")
1948
3147
def ClientAdded(self, objpath):
3156
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1957
3158
@dbus.service.signal(_interface, signature="os")
1958
3159
def ClientRemoved(self, objpath, name):
3163
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1962
3165
@dbus.service.method(_interface, out_signature="ao")
1963
3166
def GetAllClients(self):
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
3168
return dbus.Array(c.dbus_object_path for c in
3169
tcp_server.clients.itervalues())
3171
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1968
3173
@dbus.service.method(_interface,
1969
3174
out_signature="a{oa{sv}}")
1970
3175
def GetAllClientsWithProperties(self):
1972
3177
return dbus.Dictionary(
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3178
{ c.dbus_object_path: c.GetAll(
3179
"se.recompile.Mandos.Client")
3180
for c in tcp_server.clients.itervalues() },
1975
3181
signature="oa{sv}")
1977
3183
@dbus.service.method(_interface, in_signature="o")
1978
3184
def RemoveClient(self, object_path):
1980
for c in tcp_server.clients:
3186
for c in tcp_server.clients.itervalues():
1981
3187
if c.dbus_object_path == object_path:
1982
tcp_server.clients.remove(c)
3188
del tcp_server.clients[c.name]
1983
3189
c.remove_from_connection()
1984
# Don't signal anything except ClientRemoved
3190
# Don't signal the disabling
1985
3191
c.disable(quiet=True)
1987
self.ClientRemoved(object_path, c.name)
3192
# Emit D-Bus signal for removal
3193
self.client_removed_signal(c)
1989
3195
raise KeyError(object_path)
3199
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3200
out_signature = "a{oa{sa{sv}}}")
3201
def GetManagedObjects(self):
3203
return dbus.Dictionary(
3204
{ client.dbus_object_path:
3206
{ interface: client.GetAll(interface)
3208
client._get_all_interface_names()})
3209
for client in tcp_server.clients.values()})
3211
def client_added_signal(self, client):
3212
"""Send the new standard signal and the old signal"""
3214
# New standard signal
3215
self.InterfacesAdded(
3216
client.dbus_object_path,
3218
{ interface: client.GetAll(interface)
3220
client._get_all_interface_names()}))
3222
self.ClientAdded(client.dbus_object_path)
3224
def client_removed_signal(self, client):
3225
"""Send the new standard signal and the old signal"""
3227
# New standard signal
3228
self.InterfacesRemoved(
3229
client.dbus_object_path,
3230
client._get_all_interface_names())
3232
self.ClientRemoved(client.dbus_object_path,
1993
3235
mandos_dbus_service = MandosDBusService()
1996
3238
"Cleanup function; run on exit"
3242
multiprocessing.active_children()
3244
if not (tcp_server.clients or client_settings):
3247
# Store client before exiting. Secrets are encrypted with key
3248
# based on what config file has. If config file is
3249
# removed/edited, old secret will thus be unrecovable.
3251
with PGPEngine() as pgp:
3252
for client in tcp_server.clients.itervalues():
3253
key = client_settings[client.name]["secret"]
3254
client.encrypted_secret = pgp.encrypt(client.secret,
3258
# A list of attributes that can not be pickled
3260
exclude = { "bus", "changedstate", "secret",
3261
"checker", "server_settings" }
3262
for name, typ in inspect.getmembers(dbus.service
3266
client_dict["encrypted_secret"] = (client
3268
for attr in client.client_structure:
3269
if attr not in exclude:
3270
client_dict[attr] = getattr(client, attr)
3272
clients[client.name] = client_dict
3273
del client_settings[client.name]["secret"]
3276
with tempfile.NamedTemporaryFile(
3280
dir=os.path.dirname(stored_state_path),
3281
delete=False) as stored_state:
3282
pickle.dump((clients, client_settings), stored_state)
3283
tempname = stored_state.name
3284
os.rename(tempname, stored_state_path)
3285
except (IOError, OSError) as e:
3291
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3292
logger.warning("Could not save persistent state: {}"
3293
.format(os.strerror(e.errno)))
3295
logger.warning("Could not save persistent state:",
3299
# Delete all clients, and settings from config
1999
3300
while tcp_server.clients:
2000
client = tcp_server.clients.pop()
3301
name, client = tcp_server.clients.popitem()
2002
3303
client.remove_from_connection()
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3304
# Don't signal the disabling
2005
3305
client.disable(quiet=True)
3306
# Emit D-Bus signal for removal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3308
mandos_dbus_service.client_removed_signal(client)
3309
client_settings.clear()
2011
3311
atexit.register(cleanup)
2013
for client in tcp_server.clients:
3313
for client in tcp_server.clients.itervalues():
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3315
# Emit D-Bus signal for adding
3316
mandos_dbus_service.client_added_signal(client)
3317
# Need to initiate checking of clients
3319
client.init_checker()
2019
3321
tcp_server.enable()
2020
3322
tcp_server.server_activate()
2022
3324
# Find out what port we got
2023
service.port = tcp_server.socket.getsockname()[1]
3326
service.port = tcp_server.socket.getsockname()[1]
2025
3328
logger.info("Now listening on address %r, port %d,"
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3329
" flowinfo %d, scope_id %d",
3330
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
3332
logger.info("Now listening on address %r, port %d",
3333
*tcp_server.socket.getsockname())
2032
3335
#service.interface = tcp_server.socket.getsockname()[3]
2035
# From the Avahi example code
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2042
# End of Avahi example code
3339
# From the Avahi example code
3342
except dbus.exceptions.DBusException as error:
3343
logger.critical("D-Bus Exception", exc_info=error)
3346
# End of Avahi example code
2044
3348
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
3349
lambda *args, **kwargs: