95
81
except ImportError:
96
82
SO_BINDTODEVICE = None
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-")
154
self.gnupgargs = ['--batch',
155
'--home', self.tempdir,
163
def __exit__(self, exc_type, exc_value, traceback):
171
if self.tempdir is not None:
172
# Delete contents of tempdir
173
for root, dirs, files in os.walk(self.tempdir,
175
for filename in files:
176
os.remove(os.path.join(root, filename))
178
os.rmdir(os.path.join(root, dirname))
180
os.rmdir(self.tempdir)
183
def password_encode(self, password):
184
# Passphrase can not be empty and can not contain newlines or
185
# NUL bytes. So we prefix it and hex encode it.
186
encoded = b"mandos" + binascii.hexlify(password)
187
if len(encoded) > 2048:
188
# GnuPG can't handle long passwords, so encode differently
189
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
190
.replace(b"\n", b"\\n")
191
.replace(b"\0", b"\\x00"))
194
def encrypt(self, data, password):
195
passphrase = self.password_encode(password)
196
with tempfile.NamedTemporaryFile(
197
dir=self.tempdir) as passfile:
198
passfile.write(passphrase)
200
proc = subprocess.Popen(['gpg', '--symmetric',
204
stdin = subprocess.PIPE,
205
stdout = subprocess.PIPE,
206
stderr = subprocess.PIPE)
207
ciphertext, err = proc.communicate(input = data)
208
if proc.returncode != 0:
212
def decrypt(self, data, password):
213
passphrase = self.password_encode(password)
214
with tempfile.NamedTemporaryFile(
215
dir = self.tempdir) as passfile:
216
passfile.write(passphrase)
218
proc = subprocess.Popen(['gpg', '--decrypt',
222
stdin = subprocess.PIPE,
223
stdout = subprocess.PIPE,
224
stderr = subprocess.PIPE)
225
decrypted_plaintext, err = proc.communicate(input = data)
226
if proc.returncode != 0:
228
return decrypted_plaintext
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)
231
103
class AvahiError(Exception):
232
104
def __init__(self, value, *args, **kwargs):
233
105
self.value = value
234
return super(AvahiError, self).__init__(value, *args,
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
238
110
class AvahiServiceError(AvahiError):
242
113
class AvahiGroupError(AvahiError):
416
260
follow_name_owner_changes=True),
417
261
avahi.DBUS_INTERFACE_SERVER)
418
262
self.server.connect_to_signal("StateChanged",
419
self.server_state_changed)
263
self.server_state_changed)
420
264
self.server_state_changed(self.server.GetState())
423
class AvahiServiceToSyslog(AvahiService):
424
def rename(self, *args, **kwargs):
425
"""Add the new name to the syslog messages"""
426
ret = AvahiService.rename(self, *args, **kwargs)
427
syslogger.setFormatter(logging.Formatter(
428
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
432
# Pretend that we have a GnuTLS module
433
class GnuTLS(object):
434
"""This isn't so much a class as it is a module-like namespace.
435
It is instantiated once, and simulates having a GnuTLS module."""
437
_library = ctypes.cdll.LoadLibrary(
438
ctypes.util.find_library("gnutls"))
439
_need_version = "3.3.0"
441
# Need to use class name "GnuTLS" here, since this method is
442
# called before the assignment to the "gnutls" global variable
444
if GnuTLS.check_version(self._need_version) is None:
445
raise GnuTLS.Error("Needs GnuTLS {} or later"
446
.format(self._need_version))
448
# Unless otherwise indicated, the constants and types below are
449
# all from the gnutls/gnutls.h C header file.
459
E_NO_CERTIFICATE_FOUND = -49
460
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
463
class session_int(ctypes.Structure):
465
session_t = ctypes.POINTER(session_int)
466
class certificate_credentials_st(ctypes.Structure):
468
certificate_credentials_t = ctypes.POINTER(
469
certificate_credentials_st)
470
certificate_type_t = ctypes.c_int
471
class datum_t(ctypes.Structure):
472
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
473
('size', ctypes.c_uint)]
474
class openpgp_crt_int(ctypes.Structure):
476
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
477
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
478
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
479
credentials_type_t = ctypes.c_int #
480
transport_ptr_t = ctypes.c_void_p
481
close_request_t = ctypes.c_int
484
class Error(Exception):
485
# We need to use the class name "GnuTLS" here, since this
486
# exception might be raised from within GnuTLS.__init__,
487
# which is called before the assignment to the "gnutls"
488
# global variable has happened.
489
def __init__(self, message = None, code = None, args=()):
490
# Default usage is by a message string, but if a return
491
# code is passed, convert it to a string with
494
if message is None and code is not None:
495
message = GnuTLS.strerror(code)
496
return super(GnuTLS.Error, self).__init__(
499
class CertificateSecurityError(Error):
503
class Credentials(object):
505
self._c_object = gnutls.certificate_credentials_t()
506
gnutls.certificate_allocate_credentials(
507
ctypes.byref(self._c_object))
508
self.type = gnutls.CRD_CERTIFICATE
511
gnutls.certificate_free_credentials(self._c_object)
513
class ClientSession(object):
514
def __init__(self, socket, credentials = None):
515
self._c_object = gnutls.session_t()
516
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
517
gnutls.set_default_priority(self._c_object)
518
gnutls.transport_set_ptr(self._c_object, socket.fileno())
519
gnutls.handshake_set_private_extensions(self._c_object,
522
if credentials is None:
523
credentials = gnutls.Credentials()
524
gnutls.credentials_set(self._c_object, credentials.type,
525
ctypes.cast(credentials._c_object,
527
self.credentials = credentials
530
gnutls.deinit(self._c_object)
533
return gnutls.handshake(self._c_object)
535
def send(self, data):
539
data_len -= gnutls.record_send(self._c_object,
544
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
546
# Error handling functions
547
def _error_code(result):
548
"""A function to raise exceptions on errors, suitable
549
for the 'restype' attribute on ctypes functions"""
552
if result == gnutls.E_NO_CERTIFICATE_FOUND:
553
raise gnutls.CertificateSecurityError(code = result)
554
raise gnutls.Error(code = result)
556
def _retry_on_error(result, func, arguments):
557
"""A function to retry on some errors, suitable
558
for the 'errcheck' attribute on ctypes functions"""
560
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
561
return _error_code(result)
562
result = func(*arguments)
565
# Unless otherwise indicated, the function declarations below are
566
# all from the gnutls/gnutls.h C header file.
569
priority_set_direct = _library.gnutls_priority_set_direct
570
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
571
ctypes.POINTER(ctypes.c_char_p)]
572
priority_set_direct.restype = _error_code
574
init = _library.gnutls_init
575
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
576
init.restype = _error_code
578
set_default_priority = _library.gnutls_set_default_priority
579
set_default_priority.argtypes = [session_t]
580
set_default_priority.restype = _error_code
582
record_send = _library.gnutls_record_send
583
record_send.argtypes = [session_t, ctypes.c_void_p,
585
record_send.restype = ctypes.c_ssize_t
586
record_send.errcheck = _retry_on_error
588
certificate_allocate_credentials = (
589
_library.gnutls_certificate_allocate_credentials)
590
certificate_allocate_credentials.argtypes = [
591
ctypes.POINTER(certificate_credentials_t)]
592
certificate_allocate_credentials.restype = _error_code
594
certificate_free_credentials = (
595
_library.gnutls_certificate_free_credentials)
596
certificate_free_credentials.argtypes = [certificate_credentials_t]
597
certificate_free_credentials.restype = None
599
handshake_set_private_extensions = (
600
_library.gnutls_handshake_set_private_extensions)
601
handshake_set_private_extensions.argtypes = [session_t,
603
handshake_set_private_extensions.restype = None
605
credentials_set = _library.gnutls_credentials_set
606
credentials_set.argtypes = [session_t, credentials_type_t,
608
credentials_set.restype = _error_code
610
strerror = _library.gnutls_strerror
611
strerror.argtypes = [ctypes.c_int]
612
strerror.restype = ctypes.c_char_p
614
certificate_type_get = _library.gnutls_certificate_type_get
615
certificate_type_get.argtypes = [session_t]
616
certificate_type_get.restype = _error_code
618
certificate_get_peers = _library.gnutls_certificate_get_peers
619
certificate_get_peers.argtypes = [session_t,
620
ctypes.POINTER(ctypes.c_uint)]
621
certificate_get_peers.restype = ctypes.POINTER(datum_t)
623
global_set_log_level = _library.gnutls_global_set_log_level
624
global_set_log_level.argtypes = [ctypes.c_int]
625
global_set_log_level.restype = None
627
global_set_log_function = _library.gnutls_global_set_log_function
628
global_set_log_function.argtypes = [log_func]
629
global_set_log_function.restype = None
631
deinit = _library.gnutls_deinit
632
deinit.argtypes = [session_t]
633
deinit.restype = None
635
handshake = _library.gnutls_handshake
636
handshake.argtypes = [session_t]
637
handshake.restype = _error_code
638
handshake.errcheck = _retry_on_error
640
transport_set_ptr = _library.gnutls_transport_set_ptr
641
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
642
transport_set_ptr.restype = None
644
bye = _library.gnutls_bye
645
bye.argtypes = [session_t, close_request_t]
646
bye.restype = _error_code
647
bye.errcheck = _retry_on_error
649
check_version = _library.gnutls_check_version
650
check_version.argtypes = [ctypes.c_char_p]
651
check_version.restype = ctypes.c_char_p
653
# All the function declarations below are from gnutls/openpgp.h
655
openpgp_crt_init = _library.gnutls_openpgp_crt_init
656
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
657
openpgp_crt_init.restype = _error_code
659
openpgp_crt_import = _library.gnutls_openpgp_crt_import
660
openpgp_crt_import.argtypes = [openpgp_crt_t,
661
ctypes.POINTER(datum_t),
663
openpgp_crt_import.restype = _error_code
665
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
666
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
667
ctypes.POINTER(ctypes.c_uint)]
668
openpgp_crt_verify_self.restype = _error_code
670
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
671
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
672
openpgp_crt_deinit.restype = None
674
openpgp_crt_get_fingerprint = (
675
_library.gnutls_openpgp_crt_get_fingerprint)
676
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
680
openpgp_crt_get_fingerprint.restype = _error_code
682
# Remove non-public functions
683
del _error_code, _retry_on_error
684
# Create the global "gnutls" object, simulating a module
687
def call_pipe(connection, # : multiprocessing.Connection
688
func, *args, **kwargs):
689
"""This function is meant to be called by multiprocessing.Process
691
This function runs func(*args, **kwargs), and writes the resulting
692
return value on the provided multiprocessing.Connection.
694
connection.send(func(*args, **kwargs))
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))
697
273
class Client(object):
698
274
"""A representation of a client host served by this server.
701
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
702
278
approval_delay: datetime.timedelta(); Time to wait for approval
703
279
approval_duration: datetime.timedelta(); Duration of one approval
704
280
checker: subprocess.Popen(); a running checker process used
722
297
interval: datetime.timedelta(); How often to start a new checker
723
298
last_approval_request: datetime.datetime(); (UTC) or None
724
299
last_checked_ok: datetime.datetime(); (UTC) or None
725
last_checker_status: integer between 0 and 255 reflecting exit
726
status of last checker. -1 reflects crashed
727
checker, -2 means no checker completed yet.
728
last_checker_signal: The signal which killed the last checker, if
729
last_checker_status is -1
730
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
731
301
name: string; from the config file, used in log messages and
732
302
D-Bus identifiers
733
303
secret: bytestring; sent verbatim (over TLS) to client
734
304
timeout: datetime.timedelta(); How long from last_checked_ok
735
305
until this client is disabled
736
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
737
307
runtime_expansions: Allowed attributes for runtime expansion.
738
308
expires: datetime.datetime(); time (UTC) when a client will be
739
309
disabled, or None
740
server_settings: The server_settings dict from main()
743
312
runtime_expansions = ("approval_delay", "approval_duration",
744
"created", "enabled", "expires",
745
"fingerprint", "host", "interval",
746
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
747
315
"last_enabled", "name", "timeout")
750
"extended_timeout": "PT15M",
752
"checker": "fping -q -- %%(host)s",
754
"approval_delay": "PT0S",
755
"approval_duration": "PT1S",
756
"approved_by_default": "True",
761
def config_parser(config):
762
"""Construct a new dict of client settings of this form:
763
{ client_name: {setting_name: value, ...}, ...}
764
with exceptions for any special settings as defined above.
765
NOTE: Must be a pure function. Must return the same result
766
value given the same arguments.
769
for client_name in config.sections():
770
section = dict(config.items(client_name))
771
client = settings[client_name] = {}
773
client["host"] = section["host"]
774
# Reformat values from string types to Python types
775
client["approved_by_default"] = config.getboolean(
776
client_name, "approved_by_default")
777
client["enabled"] = config.getboolean(client_name,
780
# Uppercase and remove spaces from fingerprint for later
781
# comparison purposes with return value from the
782
# fingerprint() function
783
client["fingerprint"] = (section["fingerprint"].upper()
785
if "secret" in section:
786
client["secret"] = section["secret"].decode("base64")
787
elif "secfile" in section:
788
with open(os.path.expanduser(os.path.expandvars
789
(section["secfile"])),
791
client["secret"] = secfile.read()
793
raise TypeError("No secret or secfile for section {}"
795
client["timeout"] = string_to_delta(section["timeout"])
796
client["extended_timeout"] = string_to_delta(
797
section["extended_timeout"])
798
client["interval"] = string_to_delta(section["interval"])
799
client["approval_delay"] = string_to_delta(
800
section["approval_delay"])
801
client["approval_duration"] = string_to_delta(
802
section["approval_duration"])
803
client["checker_command"] = section["checker"]
804
client["last_approval_request"] = None
805
client["last_checked_ok"] = None
806
client["last_checker_status"] = -2
810
def __init__(self, settings, name = None, server_settings=None):
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'
812
if server_settings is None:
814
self.server_settings = server_settings
815
# adding all client settings
816
for setting, value in settings.items():
817
setattr(self, setting, value)
820
if not hasattr(self, "last_enabled"):
821
self.last_enabled = datetime.datetime.utcnow()
822
if not hasattr(self, "expires"):
823
self.expires = (datetime.datetime.utcnow()
826
self.last_enabled = None
829
339
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()
830
345
logger.debug(" Fingerprint: %s", self.fingerprint)
831
self.created = settings.get("created",
832
datetime.datetime.utcnow())
834
# attributes specific for this server instance
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
835
366
self.checker = None
836
367
self.checker_initiator_tag = None
837
368
self.disable_initiator_tag = None
838
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
839
372
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
841
377
self.approvals_pending = 0
842
self.changedstate = multiprocessing_manager.Condition(
843
multiprocessing_manager.Lock())
844
self.client_structure = [attr
845
for attr in self.__dict__.iterkeys()
846
if not attr.startswith("_")]
847
self.client_structure.append("client_structure")
849
for name, t in inspect.getmembers(
850
type(self), lambda obj: isinstance(obj, property)):
851
if not name.startswith("_"):
852
self.client_structure.append(name)
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())
854
# Send notice to process children that client state has changed
855
384
def send_changedstate(self):
856
with self.changedstate:
857
self.changedstate.notify_all()
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
859
389
def enable(self):
860
390
"""Start this client's checker and timeout hooks"""
861
391
if getattr(self, "enabled", False):
862
392
# 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
864
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
865
405
self.enabled = True
866
406
self.last_enabled = datetime.datetime.utcnow()
868
self.send_changedstate()
407
# Also start a new checker *right now*.
870
410
def disable(self, quiet=True):
871
411
"""Disable this client."""
872
412
if not getattr(self, "enabled", False):
415
self.send_changedstate()
875
417
logger.info("Disabling client %s", self.name)
876
if getattr(self, "disable_initiator_tag", None) is not None:
418
if getattr(self, "disable_initiator_tag", False):
877
419
gobject.source_remove(self.disable_initiator_tag)
878
420
self.disable_initiator_tag = None
879
421
self.expires = None
880
if getattr(self, "checker_initiator_tag", None) is not None:
422
if getattr(self, "checker_initiator_tag", False):
881
423
gobject.source_remove(self.checker_initiator_tag)
882
424
self.checker_initiator_tag = None
883
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
884
428
self.enabled = False
886
self.send_changedstate()
887
429
# Do not run this again if called by a gobject.timeout_add
890
432
def __del__(self):
433
self.disable_hook = None
893
def init_checker(self):
894
# Schedule a new checker to be started an 'interval' from now,
895
# and every interval from then on.
896
if self.checker_initiator_tag is not None:
897
gobject.source_remove(self.checker_initiator_tag)
898
self.checker_initiator_tag = gobject.timeout_add(
899
int(self.interval.total_seconds() * 1000),
901
# Schedule a disable() when 'timeout' has passed
902
if self.disable_initiator_tag is not None:
903
gobject.source_remove(self.disable_initiator_tag)
904
self.disable_initiator_tag = gobject.timeout_add(
905
int(self.timeout.total_seconds() * 1000), self.disable)
906
# Also start a new checker *right now*.
909
def checker_callback(self, source, condition, connection,
436
def checker_callback(self, pid, condition, command):
911
437
"""The checker has completed, so take appropriate actions."""
912
438
self.checker_callback_tag = None
913
439
self.checker = None
914
# Read return code from connection (see call_pipe)
915
returncode = connection.recv()
919
self.last_checker_status = returncode
920
self.last_checker_signal = None
921
if self.last_checker_status == 0:
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
922
443
logger.info("Checker for %(name)s succeeded",
924
445
self.checked_ok()
926
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
928
self.last_checker_status = -1
929
self.last_checker_signal = -returncode
930
450
logger.warning("Checker for %(name)s crashed?",
934
def checked_ok(self):
935
"""Assert that the client has been seen, alive and well."""
936
self.last_checked_ok = datetime.datetime.utcnow()
937
self.last_checker_status = 0
938
self.last_checker_signal = None
941
def bump_timeout(self, timeout=None):
942
"""Bump up the timeout for this client."""
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,
943
459
if timeout is None:
944
460
timeout = self.timeout
945
if self.disable_initiator_tag is not None:
946
gobject.source_remove(self.disable_initiator_tag)
947
self.disable_initiator_tag = None
948
if getattr(self, "enabled", False):
949
self.disable_initiator_tag = gobject.timeout_add(
950
int(timeout.total_seconds() * 1000), self.disable)
951
self.expires = datetime.datetime.utcnow() + 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),
953
468
def need_approval(self):
954
469
self.last_approval_request = datetime.datetime.utcnow()
959
474
If a checker already exists, leave it running and do
961
476
# The reason for not killing a running checker is that if we
962
# did that, and if a checker (for some reason) started running
963
# slowly and taking more than 'interval' time, then the client
964
# would inevitably timeout, since no checker would get a
965
# chance to run to completion. If we instead leave running
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
966
481
# checkers alone, the checker would have to take more time
967
482
# than 'timeout' for the client to be disabled, which is as it
970
if self.checker is not None and not self.checker.is_alive():
971
logger.warning("Checker was not alive; joining")
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)
974
498
# Start a new checker if needed
975
499
if self.checker is None:
976
# Escape attributes for the shell
978
attr: re.escape(str(getattr(self, attr)))
979
for attr in self.runtime_expansions }
981
command = self.checker_command % escaped_attrs
982
except TypeError as error:
983
logger.error('Could not format string "%s"',
984
self.checker_command,
986
return True # Try again later
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
987
519
self.current_checker_command = command
988
logger.info("Starting checker %r for %s", command,
990
# We don't need to redirect stdout and stderr, since
991
# in normal mode, that is already done by daemon(),
992
# and in debug mode we don't want to. (Stdin is
993
# always replaced by /dev/null.)
994
# The exception is when not debugging but nevertheless
995
# running in the foreground; use the previously
997
popen_args = { "close_fds": True,
1000
if (not self.server_settings["debug"]
1001
and self.server_settings["foreground"]):
1002
popen_args.update({"stdout": wnull,
1004
pipe = multiprocessing.Pipe(duplex = False)
1005
self.checker = multiprocessing.Process(
1007
args = (pipe[1], subprocess.call, command),
1008
kwargs = popen_args)
1009
self.checker.start()
1010
self.checker_callback_tag = gobject.io_add_watch(
1011
pipe[0].fileno(), gobject.IO_IN,
1012
self.checker_callback, pipe[0], 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",
1013
543
# Re-run this periodically if run by gobject.timeout_add
1123
class DBusObjectWithAnnotations(dbus.service.Object):
1124
"""A D-Bus object with annotations.
1126
Classes inheriting from this can use the dbus_annotations
1127
decorator to add annotations to methods or signals.
1131
def _is_dbus_thing(thing):
1132
"""Returns a function testing if an attribute is a D-Bus thing
1134
If called like _is_dbus_thing("method") it returns a function
1135
suitable for use as predicate to inspect.getmembers().
1137
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1140
def _get_all_dbus_things(self, thing):
1141
"""Returns a generator of (name, attribute) pairs
1143
return ((getattr(athing.__get__(self), "_dbus_name", name),
1144
athing.__get__(self))
1145
for cls in self.__class__.__mro__
1147
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1149
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1150
out_signature = "s",
1151
path_keyword = 'object_path',
1152
connection_keyword = 'connection')
1153
def Introspect(self, object_path, connection):
1154
"""Overloading of standard D-Bus method.
1156
Inserts annotation tags on methods and signals.
1158
xmlstring = dbus.service.Object.Introspect(self, object_path,
1161
document = xml.dom.minidom.parseString(xmlstring)
1163
for if_tag in document.getElementsByTagName("interface"):
1164
# Add annotation tags
1165
for typ in ("method", "signal"):
1166
for tag in if_tag.getElementsByTagName(typ):
1168
for name, prop in (self.
1169
_get_all_dbus_things(typ)):
1170
if (name == tag.getAttribute("name")
1171
and prop._dbus_interface
1172
== if_tag.getAttribute("name")):
1173
annots.update(getattr(
1174
prop, "_dbus_annotations", {}))
1175
for name, value in annots.items():
1176
ann_tag = document.createElement(
1178
ann_tag.setAttribute("name", name)
1179
ann_tag.setAttribute("value", value)
1180
tag.appendChild(ann_tag)
1181
# Add interface annotation tags
1182
for annotation, value in dict(
1183
itertools.chain.from_iterable(
1184
annotations().items()
1185
for name, annotations
1186
in self._get_all_dbus_things("interface")
1187
if name == if_tag.getAttribute("name")
1189
ann_tag = document.createElement("annotation")
1190
ann_tag.setAttribute("name", annotation)
1191
ann_tag.setAttribute("value", value)
1192
if_tag.appendChild(ann_tag)
1193
# Fix argument name for the Introspect method itself
1194
if (if_tag.getAttribute("name")
1195
== dbus.INTROSPECTABLE_IFACE):
1196
for cn in if_tag.getElementsByTagName("method"):
1197
if cn.getAttribute("name") == "Introspect":
1198
for arg in cn.getElementsByTagName("arg"):
1199
if (arg.getAttribute("direction")
1201
arg.setAttribute("name",
1203
xmlstring = document.toxml("utf-8")
1205
except (AttributeError, xml.dom.DOMException,
1206
xml.parsers.expat.ExpatError) as error:
1207
logger.error("Failed to override Introspection method",
1212
class DBusObjectWithProperties(DBusObjectWithAnnotations):
613
class DBusObjectWithProperties(dbus.service.Object):
1213
614
"""A D-Bus object with properties.
1215
616
Classes inheriting from this can use the dbus_service_property
1216
617
decorator to expose methods as D-Bus properties. It exposes the
1217
618
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))
1220
632
def _get_dbus_property(self, interface_name, property_name):
1221
633
"""Returns a bound method if one exists which is a D-Bus
1222
634
property with the specified name and interface.
1224
for cls in self.__class__.__mro__:
1225
for name, value in inspect.getmembers(
1226
cls, self._is_dbus_thing("property")):
1227
if (value._dbus_name == property_name
1228
and value._dbus_interface == interface_name):
1229
return value.__get__(self)
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)):
1231
646
# No such property
1232
raise DBusPropertyNotFound("{}:{}.{}".format(
1233
self.dbus_object_path, interface_name, property_name))
1236
def _get_all_interface_names(cls):
1237
"""Get a sequence of all interfaces supported by an object"""
1238
return (name for name in set(getattr(getattr(x, attr),
1239
"_dbus_interface", None)
1240
for x in (inspect.getmro(cls))
1242
if name is not None)
1244
@dbus.service.method(dbus.PROPERTIES_IFACE,
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1246
652
out_signature="v")
1247
653
def Get(self, interface_name, property_name):
1248
654
"""Standard D-Bus property Get() method, see D-Bus standard.
1295
698
if not hasattr(value, "variant_level"):
1296
properties[name] = value
1298
properties[name] = type(value)(
1299
value, variant_level = value.variant_level + 1)
1300
return dbus.Dictionary(properties, signature="sv")
1302
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1303
def PropertiesChanged(self, interface_name, changed_properties,
1304
invalidated_properties):
1305
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
1310
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1311
706
out_signature="s",
1312
707
path_keyword='object_path',
1313
708
connection_keyword='connection')
1314
709
def Introspect(self, object_path, connection):
1315
"""Overloading of standard D-Bus method.
1317
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
1319
xmlstring = DBusObjectWithAnnotations.Introspect(self,
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
1323
715
document = xml.dom.minidom.parseString(xmlstring)
1325
716
def make_tag(document, name, prop):
1326
717
e = document.createElement("property")
1327
718
e.setAttribute("name", name)
1328
719
e.setAttribute("type", prop._dbus_signature)
1329
720
e.setAttribute("access", prop._dbus_access)
1332
722
for if_tag in document.getElementsByTagName("interface"):
1334
723
for tag in (make_tag(document, name, prop)
1336
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
1337
726
if prop._dbus_interface
1338
727
== if_tag.getAttribute("name")):
1339
728
if_tag.appendChild(tag)
1340
# Add annotation tags for properties
1341
for tag in if_tag.getElementsByTagName("property"):
1343
for name, prop in self._get_all_dbus_things(
1345
if (name == tag.getAttribute("name")
1346
and prop._dbus_interface
1347
== if_tag.getAttribute("name")):
1348
annots.update(getattr(
1349
prop, "_dbus_annotations", {}))
1350
for name, value in annots.items():
1351
ann_tag = document.createElement(
1353
ann_tag.setAttribute("name", name)
1354
ann_tag.setAttribute("value", value)
1355
tag.appendChild(ann_tag)
1356
729
# Add the names to the return values for the
1357
730
# "org.freedesktop.DBus.Properties" methods
1358
731
if (if_tag.getAttribute("name")
1373
746
except (AttributeError, xml.dom.DOMException,
1374
747
xml.parsers.expat.ExpatError) as error:
1375
748
logger.error("Failed to override Introspection method",
1380
dbus.OBJECT_MANAGER_IFACE
1381
except AttributeError:
1382
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1384
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1385
"""A D-Bus object with an ObjectManager.
1387
Classes inheriting from this exposes the standard
1388
GetManagedObjects call and the InterfacesAdded and
1389
InterfacesRemoved signals on the standard
1390
"org.freedesktop.DBus.ObjectManager" interface.
1392
Note: No signals are sent automatically; they must be sent
1395
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1396
out_signature = "a{oa{sa{sv}}}")
1397
def GetManagedObjects(self):
1398
"""This function must be overridden"""
1399
raise NotImplementedError()
1401
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1402
signature = "oa{sa{sv}}")
1403
def InterfacesAdded(self, object_path, interfaces_and_properties):
1406
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1407
def InterfacesRemoved(self, object_path, interfaces):
1410
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1411
out_signature = "s",
1412
path_keyword = 'object_path',
1413
connection_keyword = 'connection')
1414
def Introspect(self, object_path, connection):
1415
"""Overloading of standard D-Bus method.
1417
Override return argument name of GetManagedObjects to be
1418
"objpath_interfaces_and_properties"
1420
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1424
document = xml.dom.minidom.parseString(xmlstring)
1426
for if_tag in document.getElementsByTagName("interface"):
1427
# Fix argument name for the GetManagedObjects method
1428
if (if_tag.getAttribute("name")
1429
== dbus.OBJECT_MANAGER_IFACE):
1430
for cn in if_tag.getElementsByTagName("method"):
1431
if (cn.getAttribute("name")
1432
== "GetManagedObjects"):
1433
for arg in cn.getElementsByTagName("arg"):
1434
if (arg.getAttribute("direction")
1438
"objpath_interfaces"
1440
xmlstring = document.toxml("utf-8")
1442
except (AttributeError, xml.dom.DOMException,
1443
xml.parsers.expat.ExpatError) as error:
1444
logger.error("Failed to override Introspection method",
1448
def datetime_to_dbus(dt, variant_level=0):
753
def datetime_to_dbus (dt, variant_level=0):
1449
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1451
756
return dbus.String("", variant_level = variant_level)
1452
return dbus.String(dt.isoformat(), variant_level=variant_level)
1455
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1456
"""A class decorator; applied to a subclass of
1457
dbus.service.Object, it will add alternate D-Bus attributes with
1458
interface names according to the "alt_interface_names" mapping.
1461
@alternate_dbus_interfaces({"org.example.Interface":
1462
"net.example.AlternateInterface"})
1463
class SampleDBusObject(dbus.service.Object):
1464
@dbus.service.method("org.example.Interface")
1465
def SampleDBusMethod():
1468
The above "SampleDBusMethod" on "SampleDBusObject" will be
1469
reachable via two interfaces: "org.example.Interface" and
1470
"net.example.AlternateInterface", the latter of which will have
1471
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1472
"true", unless "deprecate" is passed with a False value.
1474
This works for methods and signals, and also for D-Bus properties
1475
(from DBusObjectWithProperties) and interfaces (from the
1476
dbus_interface_annotations decorator).
1480
for orig_interface_name, alt_interface_name in (
1481
alt_interface_names.items()):
1483
interface_names = set()
1484
# Go though all attributes of the class
1485
for attrname, attribute in inspect.getmembers(cls):
1486
# Ignore non-D-Bus attributes, and D-Bus attributes
1487
# with the wrong interface name
1488
if (not hasattr(attribute, "_dbus_interface")
1489
or not attribute._dbus_interface.startswith(
1490
orig_interface_name)):
1492
# Create an alternate D-Bus interface name based on
1494
alt_interface = attribute._dbus_interface.replace(
1495
orig_interface_name, alt_interface_name)
1496
interface_names.add(alt_interface)
1497
# Is this a D-Bus signal?
1498
if getattr(attribute, "_dbus_is_signal", False):
1499
if sys.version_info.major == 2:
1500
# Extract the original non-method undecorated
1501
# function by black magic
1502
nonmethod_func = (dict(
1503
zip(attribute.func_code.co_freevars,
1504
attribute.__closure__))
1505
["func"].cell_contents)
1507
nonmethod_func = attribute
1508
# Create a new, but exactly alike, function
1509
# object, and decorate it to be a new D-Bus signal
1510
# with the alternate D-Bus interface name
1511
if sys.version_info.major == 2:
1512
new_function = types.FunctionType(
1513
nonmethod_func.func_code,
1514
nonmethod_func.func_globals,
1515
nonmethod_func.func_name,
1516
nonmethod_func.func_defaults,
1517
nonmethod_func.func_closure)
1519
new_function = types.FunctionType(
1520
nonmethod_func.__code__,
1521
nonmethod_func.__globals__,
1522
nonmethod_func.__name__,
1523
nonmethod_func.__defaults__,
1524
nonmethod_func.__closure__)
1525
new_function = (dbus.service.signal(
1527
attribute._dbus_signature)(new_function))
1528
# Copy annotations, if any
1530
new_function._dbus_annotations = dict(
1531
attribute._dbus_annotations)
1532
except AttributeError:
1534
# Define a creator of a function to call both the
1535
# original and alternate functions, so both the
1536
# original and alternate signals gets sent when
1537
# the function is called
1538
def fixscope(func1, func2):
1539
"""This function is a scope container to pass
1540
func1 and func2 to the "call_both" function
1541
outside of its arguments"""
1543
@functools.wraps(func2)
1544
def call_both(*args, **kwargs):
1545
"""This function will emit two D-Bus
1546
signals by calling func1 and func2"""
1547
func1(*args, **kwargs)
1548
func2(*args, **kwargs)
1549
# Make wrapper function look like a D-Bus signal
1550
for name, attr in inspect.getmembers(func2):
1551
if name.startswith("_dbus_"):
1552
setattr(call_both, name, attr)
1555
# Create the "call_both" function and add it to
1557
attr[attrname] = fixscope(attribute, new_function)
1558
# Is this a D-Bus method?
1559
elif getattr(attribute, "_dbus_is_method", False):
1560
# Create a new, but exactly alike, function
1561
# object. Decorate it to be a new D-Bus method
1562
# with the alternate D-Bus interface name. Add it
1565
dbus.service.method(
1567
attribute._dbus_in_signature,
1568
attribute._dbus_out_signature)
1569
(types.FunctionType(attribute.func_code,
1570
attribute.func_globals,
1571
attribute.func_name,
1572
attribute.func_defaults,
1573
attribute.func_closure)))
1574
# Copy annotations, if any
1576
attr[attrname]._dbus_annotations = dict(
1577
attribute._dbus_annotations)
1578
except AttributeError:
1580
# Is this a D-Bus property?
1581
elif getattr(attribute, "_dbus_is_property", False):
1582
# Create a new, but exactly alike, function
1583
# object, and decorate it to be a new D-Bus
1584
# property with the alternate D-Bus interface
1585
# name. Add it to the class.
1586
attr[attrname] = (dbus_service_property(
1587
alt_interface, attribute._dbus_signature,
1588
attribute._dbus_access,
1589
attribute._dbus_get_args_options
1591
(types.FunctionType(
1592
attribute.func_code,
1593
attribute.func_globals,
1594
attribute.func_name,
1595
attribute.func_defaults,
1596
attribute.func_closure)))
1597
# Copy annotations, if any
1599
attr[attrname]._dbus_annotations = dict(
1600
attribute._dbus_annotations)
1601
except AttributeError:
1603
# Is this a D-Bus interface?
1604
elif getattr(attribute, "_dbus_is_interface", False):
1605
# Create a new, but exactly alike, function
1606
# object. Decorate it to be a new D-Bus interface
1607
# with the alternate D-Bus interface name. Add it
1610
dbus_interface_annotations(alt_interface)
1611
(types.FunctionType(attribute.func_code,
1612
attribute.func_globals,
1613
attribute.func_name,
1614
attribute.func_defaults,
1615
attribute.func_closure)))
1617
# Deprecate all alternate interfaces
1618
iname="_AlternateDBusNames_interface_annotation{}"
1619
for interface_name in interface_names:
1621
@dbus_interface_annotations(interface_name)
1623
return { "org.freedesktop.DBus.Deprecated":
1625
# Find an unused name
1626
for aname in (iname.format(i)
1627
for i in itertools.count()):
1628
if aname not in attr:
1632
# Replace the class with a new subclass of it with
1633
# methods, signals, etc. as created above.
1634
cls = type(b"{}Alternate".format(cls.__name__),
1641
@alternate_dbus_interfaces({"se.recompile.Mandos":
1642
"se.bsnet.fukt.Mandos"})
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
1643
760
class ClientDBus(Client, DBusObjectWithProperties):
1644
761
"""A Client class using D-Bus
1651
768
runtime_expansions = (Client.runtime_expansions
1652
+ ("dbus_object_path", ))
1654
_interface = "se.recompile.Mandos.Client"
769
+ ("dbus_object_path",))
1656
771
# dbus.service.Object doesn't use super(), so we can't either.
1658
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1660
776
Client.__init__(self, *args, **kwargs)
1661
777
# Only now, when this client is initialized, can it show up on
1663
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1664
780
{ord("."): ord("_"),
1665
781
ord("-"): ord("_")})
1666
self.dbus_object_path = dbus.ObjectPath(
1667
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1668
784
DBusObjectWithProperties.__init__(self, self.bus,
1669
785
self.dbus_object_path)
1671
def notifychangeproperty(transform_func, dbus_name,
1672
type_func=lambda x: x,
1674
invalidate_only=False,
1675
_interface=_interface):
1676
""" Modify a variable so that it's a property which announces
1677
its changes to DBus.
1679
transform_fun: Function that takes a value and a variant_level
1680
and transforms it to a D-Bus type.
1681
dbus_name: D-Bus name of the variable
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
1682
795
type_func: Function that transform the value before sending it
1683
to the D-Bus. Default: no transform
1684
variant_level: D-Bus variant level. Default: 1
797
variant_level: DBus variant level. default: 1
1686
attrname = "_{}".format(dbus_name)
1688
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1689
803
if hasattr(self, "dbus_object_path"):
1690
if (not hasattr(self, attrname) or
1691
type_func(getattr(self, attrname, None))
1692
!= type_func(value)):
1694
self.PropertiesChanged(
1695
_interface, dbus.Dictionary(),
1696
dbus.Array((dbus_name, )))
1698
dbus_value = transform_func(
1700
variant_level = variant_level)
1701
self.PropertyChanged(dbus.String(dbus_name),
1703
self.PropertiesChanged(
1705
dbus.Dictionary({ dbus.String(dbus_name):
1708
setattr(self, attrname, value)
1710
return property(lambda self: getattr(self, attrname), setter)
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)
1712
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1713
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1714
815
"ApprovalPending",
1716
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1717
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1719
checker = notifychangeproperty(
1720
dbus.Boolean, "CheckerRunning",
1721
type_func = lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1722
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1723
823
"LastCheckedOK")
1724
last_checker_status = notifychangeproperty(dbus.Int16,
1725
"LastCheckerStatus")
1726
last_approval_request = notifychangeproperty(
1727
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1728
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1729
827
"ApprovedByDefault")
1730
approval_delay = notifychangeproperty(
1731
dbus.UInt64, "ApprovalDelay",
1732
type_func = lambda td: td.total_seconds() * 1000)
1733
approval_duration = notifychangeproperty(
1734
dbus.UInt64, "ApprovalDuration",
1735
type_func = lambda td: td.total_seconds() * 1000)
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)
1736
832
host = notifychangeproperty(dbus.String, "Host")
1737
timeout = notifychangeproperty(
1738
dbus.UInt64, "Timeout",
1739
type_func = lambda td: td.total_seconds() * 1000)
1740
extended_timeout = notifychangeproperty(
1741
dbus.UInt64, "ExtendedTimeout",
1742
type_func = lambda td: td.total_seconds() * 1000)
1743
interval = notifychangeproperty(
1744
dbus.UInt64, "Interval",
1745
type_func = lambda td: td.total_seconds() * 1000)
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)
1746
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1747
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1748
invalidate_only=True)
1750
841
del notifychangeproperty
1994
1064
return datetime_to_dbus(self.last_approval_request)
1996
1066
# Timeout - property
1997
@dbus_service_property(_interface,
1067
@dbus_service_property(_interface, signature="t",
1999
1068
access="readwrite")
2000
1069
def Timeout_dbus_property(self, value=None):
2001
1070
if value is None: # get
2002
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2003
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
2004
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
2005
# Reschedule disabling
2007
now = datetime.datetime.utcnow()
2008
self.expires += self.timeout - old_timeout
2009
if self.expires <= now:
2010
# The timeout has passed
2013
if (getattr(self, "disable_initiator_tag", None)
2016
gobject.source_remove(self.disable_initiator_tag)
2017
self.disable_initiator_tag = gobject.timeout_add(
2018
int((self.expires - now).total_seconds() * 1000),
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))
2021
1094
# ExtendedTimeout - property
2022
@dbus_service_property(_interface,
1095
@dbus_service_property(_interface, signature="t",
2024
1096
access="readwrite")
2025
1097
def ExtendedTimeout_dbus_property(self, value=None):
2026
1098
if value is None: # get
2027
return dbus.UInt64(self.extended_timeout.total_seconds()
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2029
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2031
1102
# Interval - property
2032
@dbus_service_property(_interface,
1103
@dbus_service_property(_interface, signature="t",
2034
1104
access="readwrite")
2035
1105
def Interval_dbus_property(self, value=None):
2036
1106
if value is None: # get
2037
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2038
1108
self.interval = datetime.timedelta(0, 0, 0, value)
2039
1109
if getattr(self, "checker_initiator_tag", None) is None:
2042
# Reschedule checker run
2043
gobject.source_remove(self.checker_initiator_tag)
2044
self.checker_initiator_tag = gobject.timeout_add(
2045
value, self.start_checker)
2046
self.start_checker() # Start one now, too
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
2048
1117
# Checker - property
2049
@dbus_service_property(_interface,
1118
@dbus_service_property(_interface, signature="s",
2051
1119
access="readwrite")
2052
1120
def Checker_dbus_property(self, value=None):
2053
1121
if value is None: # get
2054
1122
return dbus.String(self.checker_command)
2055
self.checker_command = str(value)
1123
self.checker_command = value
2057
1125
# CheckerRunning - property
2058
@dbus_service_property(_interface,
1126
@dbus_service_property(_interface, signature="b",
2060
1127
access="readwrite")
2061
1128
def CheckerRunning_dbus_property(self, value=None):
2062
1129
if value is None: # get
2277
1352
def fingerprint(openpgp):
2278
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2279
1354
# New GnuTLS "datum" with the OpenPGP public key
2280
datum = gnutls.datum_t(
2281
ctypes.cast(ctypes.c_char_p(openpgp),
2282
ctypes.POINTER(ctypes.c_ubyte)),
2283
ctypes.c_uint(len(openpgp)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1359
ctypes.c_uint(len(openpgp))))
2284
1360
# New empty GnuTLS certificate
2285
crt = gnutls.openpgp_crt_t()
2286
gnutls.openpgp_crt_init(ctypes.byref(crt))
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2287
1364
# Import the OpenPGP public key into the certificate
2288
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2289
gnutls.OPENPGP_FMT_RAW)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2290
1369
# Verify the self signature in the key
2291
1370
crtverify = ctypes.c_uint()
2292
gnutls.openpgp_crt_verify_self(crt, 0,
2293
ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2294
1374
if crtverify.value != 0:
2295
gnutls.openpgp_crt_deinit(crt)
2296
raise gnutls.CertificateSecurityError("Verify failed")
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
2297
1378
# New buffer for the fingerprint
2298
1379
buf = ctypes.create_string_buffer(20)
2299
1380
buf_len = ctypes.c_size_t()
2300
1381
# Get the fingerprint from the certificate into the buffer
2301
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2302
ctypes.byref(buf_len))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2303
1385
# Deinit the certificate
2304
gnutls.openpgp_crt_deinit(crt)
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2305
1387
# Convert the buffer to a Python bytestring
2306
1388
fpr = ctypes.string_at(buf, buf_len.value)
2307
1389
# Convert the bytestring to hexadecimal notation
2308
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2312
1394
class MultiprocessingMixIn(object):
2313
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2315
1396
def sub_process_main(self, request, address):
2317
1398
self.finish_request(request, address)
2319
1400
self.handle_error(request, address)
2320
1401
self.close_request(request)
2322
1403
def process_request(self, request, address):
2323
1404
"""Start a new process to process the request."""
2324
proc = multiprocessing.Process(target = self.sub_process_main,
2325
args = (request, address))
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
2330
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2331
1409
""" adds a pipe to the MixIn """
2333
1410
def process_request(self, request, client_address):
2334
1411
"""Overrides and wraps the original process_request().
2336
1413
This function creates a new pipe in self.pipe
2338
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2340
proc = MultiprocessingMixIn.process_request(self, request,
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2342
1419
self.child_pipe.close()
2343
self.add_pipe(parent_pipe, proc)
2345
def add_pipe(self, parent_pipe, proc):
1420
self.add_pipe(parent_pipe)
1422
def add_pipe(self, parent_pipe):
2346
1423
"""Dummy function; override as necessary"""
2347
raise NotImplementedError()
1424
raise NotImplementedError
2350
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2351
1427
socketserver.TCPServer, object):
2516
1558
"dress: %s", fpr, address)
2517
1559
if self.use_dbus:
2518
1560
# Emit D-Bus signal
2519
mandos_dbus_service.ClientNotFound(fpr,
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2521
1562
parent_pipe.send(False)
2524
gobject.io_add_watch(
2525
parent_pipe.fileno(),
2526
gobject.IO_IN | gobject.IO_HUP,
2527
functools.partial(self.handle_ipc,
2528
parent_pipe = parent_pipe,
2530
client_object = client))
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))
2531
1570
parent_pipe.send(True)
2532
# remove the old hook in favor of the new above hook on
1571
# remove the old hook in favor of the new above hook on same fileno
2535
1573
if command == 'funcall':
2536
1574
funcname = request[1]
2537
1575
args = request[2]
2538
1576
kwargs = request[3]
2540
parent_pipe.send(('data', getattr(client_object,
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2544
1580
if command == 'getattr':
2545
1581
attrname = request[1]
2546
if isinstance(client_object.__getattribute__(attrname),
2547
collections.Callable):
2548
parent_pipe.send(('function', ))
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2551
'data', client_object.__getattribute__(attrname)))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2553
1587
if command == 'setattr':
2554
1588
attrname = request[1]
2555
1589
value = request[2]
2556
1590
setattr(client_object, attrname, value)
2561
def rfc3339_duration_to_delta(duration):
2562
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2564
>>> rfc3339_duration_to_delta("P7D")
2565
datetime.timedelta(7)
2566
>>> rfc3339_duration_to_delta("PT60S")
2567
datetime.timedelta(0, 60)
2568
>>> rfc3339_duration_to_delta("PT60M")
2569
datetime.timedelta(0, 3600)
2570
>>> rfc3339_duration_to_delta("PT24H")
2571
datetime.timedelta(1)
2572
>>> rfc3339_duration_to_delta("P1W")
2573
datetime.timedelta(7)
2574
>>> rfc3339_duration_to_delta("PT5M30S")
2575
datetime.timedelta(0, 330)
2576
>>> rfc3339_duration_to_delta("P1DT3M20S")
2577
datetime.timedelta(1, 200)
2580
# Parsing an RFC 3339 duration with regular expressions is not
2581
# possible - there would have to be multiple places for the same
2582
# values, like seconds. The current code, while more esoteric, is
2583
# cleaner without depending on a parsing library. If Python had a
2584
# built-in library for parsing we would use it, but we'd like to
2585
# avoid excessive use of external libraries.
2587
# New type for defining tokens, syntax, and semantics all-in-one
2588
Token = collections.namedtuple("Token", (
2589
"regexp", # To match token; if "value" is not None, must have
2590
# a "group" containing digits
2591
"value", # datetime.timedelta or None
2592
"followers")) # Tokens valid after this token
2593
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2594
# the "duration" ABNF definition in RFC 3339, Appendix A.
2595
token_end = Token(re.compile(r"$"), None, frozenset())
2596
token_second = Token(re.compile(r"(\d+)S"),
2597
datetime.timedelta(seconds=1),
2598
frozenset((token_end, )))
2599
token_minute = Token(re.compile(r"(\d+)M"),
2600
datetime.timedelta(minutes=1),
2601
frozenset((token_second, token_end)))
2602
token_hour = Token(re.compile(r"(\d+)H"),
2603
datetime.timedelta(hours=1),
2604
frozenset((token_minute, token_end)))
2605
token_time = Token(re.compile(r"T"),
2607
frozenset((token_hour, token_minute,
2609
token_day = Token(re.compile(r"(\d+)D"),
2610
datetime.timedelta(days=1),
2611
frozenset((token_time, token_end)))
2612
token_month = Token(re.compile(r"(\d+)M"),
2613
datetime.timedelta(weeks=4),
2614
frozenset((token_day, token_end)))
2615
token_year = Token(re.compile(r"(\d+)Y"),
2616
datetime.timedelta(weeks=52),
2617
frozenset((token_month, token_end)))
2618
token_week = Token(re.compile(r"(\d+)W"),
2619
datetime.timedelta(weeks=1),
2620
frozenset((token_end, )))
2621
token_duration = Token(re.compile(r"P"), None,
2622
frozenset((token_year, token_month,
2623
token_day, token_time,
2625
# Define starting values
2626
value = datetime.timedelta() # Value so far
2628
followers = frozenset((token_duration, )) # Following valid tokens
2629
s = duration # String left to parse
2630
# Loop until end token is found
2631
while found_token is not token_end:
2632
# Search for any currently valid tokens
2633
for token in followers:
2634
match = token.regexp.match(s)
2635
if match is not None:
2637
if token.value is not None:
2638
# Value found, parse digits
2639
factor = int(match.group(1), 10)
2640
# Add to value so far
2641
value += factor * token.value
2642
# Strip token from string
2643
s = token.regexp.sub("", s, 1)
2646
# Set valid next tokens
2647
followers = found_token.followers
2650
# No currently valid tokens were found
2651
raise ValueError("Invalid RFC 3339 duration: {!r}"
2657
1595
def string_to_delta(interval):
2658
1596
"""Parse a string and return a datetime.timedelta
2788
1729
"debug": "False",
2790
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2791
":+SIGN-DSA-SHA256",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2792
1732
"servicename": "Mandos",
2793
1733
"use_dbus": "True",
2794
1734
"use_ipv6": "True",
2795
1735
"debuglevel": "",
2798
"statedir": "/var/lib/mandos",
2799
"foreground": "False",
2803
1738
# Parse config file for server-global settings
2804
1739
server_config = configparser.SafeConfigParser(server_defaults)
2805
1740
del server_defaults
2806
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1741
server_config.read(os.path.join(options.configdir,
2807
1743
# Convert the SafeConfigParser object to a dict
2808
1744
server_settings = server_config.defaults()
2809
1745
# Use the appropriate methods on the non-string config options
2810
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2811
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2813
1749
if server_settings["port"]:
2814
1750
server_settings["port"] = server_config.getint("DEFAULT",
2816
if server_settings["socket"]:
2817
server_settings["socket"] = server_config.getint("DEFAULT",
2819
# Later, stdin will, and stdout and stderr might, be dup'ed
2820
# over with an opened os.devnull. But we don't want this to
2821
# happen with a supplied network socket.
2822
if 0 <= server_settings["socket"] <= 2:
2823
server_settings["socket"] = os.dup(server_settings
2825
1752
del server_config
2827
1754
# Override the settings from the config file with command line
2828
1755
# options, if set.
2829
1756
for option in ("interface", "address", "port", "debug",
2830
"priority", "servicename", "configdir", "use_dbus",
2831
"use_ipv6", "debuglevel", "restore", "statedir",
2832
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
2833
1759
value = getattr(options, option)
2834
1760
if value is not None:
2835
1761
server_settings[option] = value
2837
1763
# Force all strings to be unicode
2838
1764
for option in server_settings.keys():
2839
if isinstance(server_settings[option], bytes):
2840
server_settings[option] = (server_settings[option]
2842
# Force all boolean options to be boolean
2843
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2844
"foreground", "zeroconf"):
2845
server_settings[option] = bool(server_settings[option])
2846
# Debug implies foreground
2847
if server_settings["debug"]:
2848
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2849
1767
# Now we have our good server settings in "server_settings"
2851
1769
##################################################################
2853
if (not server_settings["zeroconf"]
2854
and not (server_settings["port"]
2855
or server_settings["socket"] != "")):
2856
parser.error("Needs port or socket to work without Zeroconf")
2858
1771
# For convenience
2859
1772
debug = server_settings["debug"]
2860
1773
debuglevel = server_settings["debuglevel"]
2861
1774
use_dbus = server_settings["use_dbus"]
2862
1775
use_ipv6 = server_settings["use_ipv6"]
2863
stored_state_path = os.path.join(server_settings["statedir"],
2865
foreground = server_settings["foreground"]
2866
zeroconf = server_settings["zeroconf"]
2869
initlogger(debug, logging.DEBUG)
2874
level = getattr(logging, debuglevel.upper())
2875
initlogger(debug, level)
2877
1777
if server_settings["servicename"] != "Mandos":
2878
syslogger.setFormatter(
2879
logging.Formatter('Mandos ({}) [%(process)d]:'
2880
' %(levelname)s: %(message)s'.format(
2881
server_settings["servicename"])))
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2883
1783
# Parse config file with clients
2884
client_config = configparser.SafeConfigParser(Client
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)
2886
1793
client_config.read(os.path.join(server_settings["configdir"],
2887
1794
"clients.conf"))
2889
1796
global mandos_dbus_service
2890
1797
mandos_dbus_service = None
2893
if server_settings["socket"] != "":
2894
socketfd = server_settings["socket"]
2895
tcp_server = MandosServer(
2896
(server_settings["address"], server_settings["port"]),
2898
interface=(server_settings["interface"] or None),
2900
gnutls_priority=server_settings["priority"],
2904
pidfilename = "/run/mandos.pid"
2905
if not os.path.isdir("/run/."):
2906
pidfilename = "/var/run/mandos.pid"
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"
2909
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2910
except IOError as e:
2911
logger.error("Could not open file %r", pidfilename,
1811
pidfile = open(pidfilename, "w")
1813
logger.error("Could not open file %r", pidfilename)
2914
for name in ("_mandos", "mandos", "nobody"):
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
2916
uid = pwd.getpwnam(name).pw_uid
2917
gid = pwd.getpwnam(name).pw_gid
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2919
1822
except KeyError:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
2927
1832
except OSError as error:
2928
if error.errno != errno.EPERM:
1833
if error[0] != 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)
2932
1845
# Enable all possible GnuTLS debugging
2934
1847
# "Use a log level over 10 to enable all debugging options."
2935
1848
# - GnuTLS manual
2936
gnutls.global_set_log_level(11)
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1851
@gnutls.library.types.gnutls_log_func
2939
1852
def debug_gnutls(level, string):
2940
1853
logger.debug("GnuTLS: %s", string[:-1])
2942
gnutls.global_set_log_function(debug_gnutls)
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
2944
1858
# Redirect stdin so all checkers get /dev/null
2945
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2946
1860
os.dup2(null, sys.stdin.fileno())
1864
# No console logging
1865
logger.removeHandler(console)
2950
1867
# Need to fork before connecting to D-Bus
2952
1869
# Close all input and output, do double fork, etc.
2955
# multiprocessing will use threads, so before we use gobject we
2956
# need to inform gobject that threads will be used.
2957
gobject.threads_init()
2959
1872
global main_loop
2960
1873
# From the Avahi example code
2961
DBusGMainLoop(set_as_default=True)
1874
DBusGMainLoop(set_as_default=True )
2962
1875
main_loop = gobject.MainLoop()
2963
1876
bus = dbus.SystemBus()
2964
1877
# End of Avahi example code
2967
bus_name = dbus.service.BusName("se.recompile.Mandos",
2970
old_bus_name = dbus.service.BusName(
2971
"se.bsnet.fukt.Mandos", bus,
2973
except dbus.exceptions.DBusException as e:
2974
logger.error("Disabling D-Bus:", exc_info=e)
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")
2975
1884
use_dbus = False
2976
1885
server_settings["use_dbus"] = False
2977
1886
tcp_server.use_dbus = False
2979
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2980
service = AvahiServiceToSyslog(
2981
name = server_settings["servicename"],
2982
servicetype = "_mandos._tcp",
2983
protocol = protocol,
2985
if server_settings["interface"]:
2986
service.interface = if_nametoindex(
2987
server_settings["interface"].encode("utf-8"))
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"])))
2989
1895
global multiprocessing_manager
2990
1896
multiprocessing_manager = multiprocessing.Manager()
2992
1898
client_class = Client
2994
1900
client_class = functools.partial(ClientDBus, bus = bus)
2996
client_settings = Client.config_parser(client_config)
2997
old_client_settings = {}
3000
# This is used to redirect stdout and stderr for checker processes
3002
wnull = open(os.devnull, "w") # A writable /dev/null
3003
# Only used if server is running in foreground but not in debug
3005
if debug or not foreground:
3008
# Get client data and settings from last running state.
3009
if server_settings["restore"]:
3011
with open(stored_state_path, "rb") as stored_state:
3012
clients_data, old_client_settings = pickle.load(
3014
os.remove(stored_state_path)
3015
except IOError as e:
3016
if e.errno == errno.ENOENT:
3017
logger.warning("Could not load persistent state:"
3018
" {}".format(os.strerror(e.errno)))
3020
logger.critical("Could not load persistent state:",
3023
except EOFError as e:
3024
logger.warning("Could not load persistent state: "
3028
with PGPEngine() as pgp:
3029
for client_name, client in clients_data.items():
3030
# Skip removed clients
3031
if client_name not in client_settings:
3034
# Decide which value to use after restoring saved state.
3035
# We have three different values: Old config file,
3036
# new config file, and saved state.
3037
# New config value takes precedence if it differs from old
3038
# config value, otherwise use saved state.
3039
for name, value in client_settings[client_name].items():
3041
# For each value in new config, check if it
3042
# differs from the old config value (Except for
3043
# the "secret" attribute)
3044
if (name != "secret"
3046
old_client_settings[client_name][name])):
3047
client[name] = value
3051
# Clients who has passed its expire date can still be
3052
# enabled if its last checker was successful. A Client
3053
# whose checker succeeded before we stored its state is
3054
# assumed to have successfully run all checkers during
3056
if client["enabled"]:
3057
if datetime.datetime.utcnow() >= client["expires"]:
3058
if not client["last_checked_ok"]:
3060
"disabling client {} - Client never "
3061
"performed a successful checker".format(
3063
client["enabled"] = False
3064
elif client["last_checker_status"] != 0:
3066
"disabling client {} - Client last"
3067
" checker failed with error code"
3070
client["last_checker_status"]))
3071
client["enabled"] = False
3073
client["expires"] = (
3074
datetime.datetime.utcnow()
3075
+ client["timeout"])
3076
logger.debug("Last checker succeeded,"
3077
" keeping {} enabled".format(
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):
3080
client["secret"] = pgp.decrypt(
3081
client["encrypted_secret"],
3082
client_settings[client_name]["secret"])
3084
# If decryption fails, we use secret from new settings
3085
logger.debug("Failed to decrypt {} old secret".format(
3087
client["secret"] = (client_settings[client_name]
3090
# Add/remove clients based on new changes made to config
3091
for client_name in (set(old_client_settings)
3092
- set(client_settings)):
3093
del clients_data[client_name]
3094
for client_name in (set(client_settings)
3095
- set(old_client_settings)):
3096
clients_data[client_name] = client_settings[client_name]
3098
# Create all client objects
3099
for client_name, client in clients_data.items():
3100
tcp_server.clients[client_name] = client_class(
3103
server_settings = server_settings)
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()))
3105
1918
if not tcp_server.clients:
3106
1919
logger.warning("No clients defined")
3109
if pidfile is not None:
3113
print(pid, file=pidfile)
3115
logger.error("Could not write to file %r with PID %d",
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
3118
1933
del pidfilename
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
3120
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3121
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3125
@alternate_dbus_interfaces(
3126
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3127
class MandosDBusService(DBusObjectWithObjectManager):
1941
class MandosDBusService(dbus.service.Object):
3128
1942
"""A D-Bus proxy object"""
3130
1943
def __init__(self):
3131
1944
dbus.service.Object.__init__(self, bus, "/")
3133
_interface = "se.recompile.Mandos"
1945
_interface = "se.bsnet.fukt.Mandos"
3135
1947
@dbus.service.signal(_interface, signature="o")
3136
1948
def ClientAdded(self, objpath):
3145
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3147
1957
@dbus.service.signal(_interface, signature="os")
3148
1958
def ClientRemoved(self, objpath, name):
3152
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3154
1962
@dbus.service.method(_interface, out_signature="ao")
3155
1963
def GetAllClients(self):
3157
return dbus.Array(c.dbus_object_path for c in
3158
tcp_server.clients.itervalues())
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
3160
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3162
1968
@dbus.service.method(_interface,
3163
1969
out_signature="a{oa{sv}}")
3164
1970
def GetAllClientsWithProperties(self):
3166
1972
return dbus.Dictionary(
3167
{ c.dbus_object_path: c.GetAll(
3168
"se.recompile.Mandos.Client")
3169
for c in tcp_server.clients.itervalues() },
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3170
1975
signature="oa{sv}")
3172
1977
@dbus.service.method(_interface, in_signature="o")
3173
1978
def RemoveClient(self, object_path):
3175
for c in tcp_server.clients.itervalues():
1980
for c in tcp_server.clients:
3176
1981
if c.dbus_object_path == object_path:
3177
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
3178
1983
c.remove_from_connection()
3179
# Don't signal the disabling
1984
# Don't signal anything except ClientRemoved
3180
1985
c.disable(quiet=True)
3181
# Emit D-Bus signal for removal
3182
self.client_removed_signal(c)
1987
self.ClientRemoved(object_path, c.name)
3184
1989
raise KeyError(object_path)
3188
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3189
out_signature = "a{oa{sa{sv}}}")
3190
def GetManagedObjects(self):
3192
return dbus.Dictionary(
3193
{ client.dbus_object_path:
3195
{ interface: client.GetAll(interface)
3197
client._get_all_interface_names()})
3198
for client in tcp_server.clients.values()})
3200
def client_added_signal(self, client):
3201
"""Send the new standard signal and the old signal"""
3203
# New standard signal
3204
self.InterfacesAdded(
3205
client.dbus_object_path,
3207
{ interface: client.GetAll(interface)
3209
client._get_all_interface_names()}))
3211
self.ClientAdded(client.dbus_object_path)
3213
def client_removed_signal(self, client):
3214
"""Send the new standard signal and the old signal"""
3216
# New standard signal
3217
self.InterfacesRemoved(
3218
client.dbus_object_path,
3219
client._get_all_interface_names())
3221
self.ClientRemoved(client.dbus_object_path,
3224
1993
mandos_dbus_service = MandosDBusService()
3227
1996
"Cleanup function; run on exit"
3231
multiprocessing.active_children()
3233
if not (tcp_server.clients or client_settings):
3236
# Store client before exiting. Secrets are encrypted with key
3237
# based on what config file has. If config file is
3238
# removed/edited, old secret will thus be unrecovable.
3240
with PGPEngine() as pgp:
3241
for client in tcp_server.clients.itervalues():
3242
key = client_settings[client.name]["secret"]
3243
client.encrypted_secret = pgp.encrypt(client.secret,
3247
# A list of attributes that can not be pickled
3249
exclude = { "bus", "changedstate", "secret",
3250
"checker", "server_settings" }
3251
for name, typ in inspect.getmembers(dbus.service
3255
client_dict["encrypted_secret"] = (client
3257
for attr in client.client_structure:
3258
if attr not in exclude:
3259
client_dict[attr] = getattr(client, attr)
3261
clients[client.name] = client_dict
3262
del client_settings[client.name]["secret"]
3265
with tempfile.NamedTemporaryFile(
3269
dir=os.path.dirname(stored_state_path),
3270
delete=False) as stored_state:
3271
pickle.dump((clients, client_settings), stored_state)
3272
tempname = stored_state.name
3273
os.rename(tempname, stored_state_path)
3274
except (IOError, OSError) as e:
3280
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3281
logger.warning("Could not save persistent state: {}"
3282
.format(os.strerror(e.errno)))
3284
logger.warning("Could not save persistent state:",
3288
# Delete all clients, and settings from config
3289
1999
while tcp_server.clients:
3290
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
3292
2002
client.remove_from_connection()
3293
# Don't signal the disabling
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3294
2005
client.disable(quiet=True)
3295
# Emit D-Bus signal for removal
3297
mandos_dbus_service.client_removed_signal(client)
3298
client_settings.clear()
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3300
2011
atexit.register(cleanup)
3302
for client in tcp_server.clients.itervalues():
2013
for client in tcp_server.clients:
3304
# Emit D-Bus signal for adding
3305
mandos_dbus_service.client_added_signal(client)
3306
# Need to initiate checking of clients
3308
client.init_checker()
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3310
2019
tcp_server.enable()
3311
2020
tcp_server.server_activate()
3313
2022
# Find out what port we got
3315
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
3317
2025
logger.info("Now listening on address %r, port %d,"
3318
" flowinfo %d, scope_id %d",
3319
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3321
logger.info("Now listening on address %r, port %d",
3322
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
3324
2032
#service.interface = tcp_server.socket.getsockname()[3]
3328
# From the Avahi example code
3331
except dbus.exceptions.DBusException as error:
3332
logger.critical("D-Bus Exception", exc_info=error)
3335
# End of Avahi example code
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
3337
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3338
2045
lambda *args, **kwargs: