76
88
except ImportError:
77
89
SO_BINDTODEVICE = None
82
logger = logging.Logger(u'mandos')
92
stored_state_file = "clients.pickle"
94
logger = logging.getLogger()
83
95
syslogger = (logging.handlers.SysLogHandler
84
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
89
logger.addHandler(syslogger)
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
logger.addHandler(console)
97
address = str("/dev/log")))
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
103
except (OSError, AttributeError):
104
def if_nametoindex(interface):
105
"Get an interface index the hard way, i.e. using fcntl()"
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
with contextlib.closing(socket.socket()) as s:
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
113
return interface_index
116
def initlogger(debug, level=logging.WARNING):
117
"""init logger and add loglevel"""
119
syslogger.setFormatter(logging.Formatter
120
('Mandos [%(process)d]: %(levelname)s:'
122
logger.addHandler(syslogger)
125
console = logging.StreamHandler()
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
logger.addHandler(console)
131
logger.setLevel(level)
134
class PGPError(Exception):
135
"""Exception if encryption/decryption fails"""
139
class PGPEngine(object):
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
self.gnupgargs = ['--batch',
144
'--home', self.tempdir,
152
def __exit__(self, exc_type, exc_value, traceback):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
164
for filename in files:
165
os.remove(os.path.join(root, filename))
167
os.rmdir(os.path.join(root, dirname))
169
os.rmdir(self.tempdir)
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
183
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
187
passfile.write(passphrase)
189
proc = subprocess.Popen(['gpg', '--symmetric',
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
if proc.returncode != 0:
201
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
passfile.write(passphrase)
207
proc = subprocess.Popen(['gpg', '--decrypt',
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
216
if proc.returncode != 0:
218
return decrypted_plaintext
97
221
class AvahiError(Exception):
98
222
def __init__(self, value, *args, **kwargs):
186
322
dbus.UInt16(self.port),
187
323
avahi.string_array_to_txt_array(self.TXT))
188
324
self.group.Commit()
189
326
def entry_group_state_changed(self, state, error):
190
327
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
328
logger.debug("Avahi entry group state change: %i", state)
193
330
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
331
logger.debug("Zeroconf service established.")
195
332
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
333
logger.info("Zeroconf service name collision.")
198
335
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
336
logger.critical("Avahi: Error in group state changed %s",
201
raise AvahiGroupError(u"State changed: %s"
338
raise AvahiGroupError("State changed: {0!s}"
203
341
def cleanup(self):
204
342
"""Derived from the Avahi example code"""
205
343
if self.group is not None:
346
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
207
349
self.group = None
208
def server_state_changed(self, state):
352
def server_state_changed(self, state, error=None):
209
353
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
354
logger.debug("Avahi server state change: %i", state)
355
bad_states = { avahi.SERVER_INVALID:
356
"Zeroconf server invalid",
357
avahi.SERVER_REGISTERING: None,
358
avahi.SERVER_COLLISION:
359
"Zeroconf server name collision",
360
avahi.SERVER_FAILURE:
361
"Zeroconf server failure" }
362
if state in bad_states:
363
if bad_states[state] is not None:
365
logger.error(bad_states[state])
367
logger.error(bad_states[state] + ": %r", error)
213
369
elif state == avahi.SERVER_RUNNING:
373
logger.debug("Unknown state: %r", state)
375
logger.debug("Unknown state: %r: %r", state, error)
215
377
def activate(self):
216
378
"""Derived from the Avahi example code"""
217
379
if self.server is None:
218
380
self.server = dbus.Interface(
219
381
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
382
avahi.DBUS_PATH_SERVER,
383
follow_name_owner_changes=True),
221
384
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
385
self.server.connect_to_signal("StateChanged",
223
386
self.server_state_changed)
224
387
self.server_state_changed(self.server.GetState())
390
class AvahiServiceToSyslog(AvahiService):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
401
def timedelta_to_milliseconds(td):
402
"Convert a datetime.timedelta() to milliseconds"
403
return ((td.days * 24 * 60 * 60 * 1000)
404
+ (td.seconds * 1000)
405
+ (td.microseconds // 1000))
227
408
class Client(object):
228
409
"""A representation of a client host served by this server.
231
name: string; from the config file, used in log messages and
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
412
approved: bool(); 'None' if not yet approved/disapproved
413
approval_delay: datetime.timedelta(); Time to wait for approval
414
approval_duration: datetime.timedelta(); Duration of one approval
245
415
checker: subprocess.Popen(); a running checker process used
246
416
to see if the client lives.
247
417
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
418
checker_callback_tag: a gobject event source tag, or None
419
checker_command: string; External command which is run to check
420
if client lives. %() expansions are done at
253
421
runtime with vars(self) as dict, so that for
254
422
instance %(name)s can be used in the command.
423
checker_initiator_tag: a gobject event source tag, or None
424
created: datetime.datetime(); (UTC) object creation
425
client_structure: Object describing what attributes a client has
426
and is used for storing the client at exit
255
427
current_checker_command: string; current running checker_command
428
disable_initiator_tag: a gobject event source tag, or None
430
fingerprint: string (40 or 32 hexadecimal digits); used to
431
uniquely identify the client
432
host: string; available for use by the checker command
433
interval: datetime.timedelta(); How often to start a new checker
434
last_approval_request: datetime.datetime(); (UTC) or None
435
last_checked_ok: datetime.datetime(); (UTC) or None
436
last_checker_status: integer between 0 and 255 reflecting exit
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
last_enabled: datetime.datetime(); (UTC) or None
440
name: string; from the config file, used in log messages and
442
secret: bytestring; sent verbatim (over TLS) to client
443
timeout: datetime.timedelta(); How long from last_checked_ok
444
until this client is disabled
445
extended_timeout: extra long timeout when secret has been sent
446
runtime_expansions: Allowed attributes for runtime expansion.
447
expires: datetime.datetime(); time (UTC) when a client will be
449
server_settings: The server_settings dict from main()
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
452
runtime_expansions = ("approval_delay", "approval_duration",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
456
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
460
"checker": "fping -q -- %%(host)s",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
265
468
def timeout_milliseconds(self):
266
469
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
470
return timedelta_to_milliseconds(self.timeout)
472
def extended_timeout_milliseconds(self):
473
"Return the 'extended_timeout' attribute in milliseconds"
474
return timedelta_to_milliseconds(self.extended_timeout)
269
476
def interval_milliseconds(self):
270
477
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
478
return timedelta_to_milliseconds(self.interval)
480
def approval_delay_milliseconds(self):
481
return timedelta_to_milliseconds(self.approval_delay)
484
def config_parser(config):
485
"""Construct a new dict of client settings of this form:
486
{ client_name: {setting_name: value, ...}, ...}
487
with exceptions for any special settings as defined above.
488
NOTE: Must be a pure function. Must return the same result
489
value given the same arguments.
492
for client_name in config.sections():
493
section = dict(config.items(client_name))
494
client = settings[client_name] = {}
496
client["host"] = section["host"]
497
# Reformat values from string types to Python types
498
client["approved_by_default"] = config.getboolean(
499
client_name, "approved_by_default")
500
client["enabled"] = config.getboolean(client_name,
503
client["fingerprint"] = (section["fingerprint"].upper()
505
if "secret" in section:
506
client["secret"] = section["secret"].decode("base64")
507
elif "secfile" in section:
508
with open(os.path.expanduser(os.path.expandvars
509
(section["secfile"])),
511
client["secret"] = secfile.read()
513
raise TypeError("No secret or secfile for section {0}"
515
client["timeout"] = string_to_delta(section["timeout"])
516
client["extended_timeout"] = string_to_delta(
517
section["extended_timeout"])
518
client["interval"] = string_to_delta(section["interval"])
519
client["approval_delay"] = string_to_delta(
520
section["approval_delay"])
521
client["approval_duration"] = string_to_delta(
522
section["approval_duration"])
523
client["checker_command"] = section["checker"]
524
client["last_approval_request"] = None
525
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
530
def __init__(self, settings, name = None, server_settings=None):
280
logger.debug(u"Creating client %r", self.name)
532
if server_settings is None:
534
self.server_settings = server_settings
535
# adding all client settings
536
for setting, value in settings.iteritems():
537
setattr(self, setting, value)
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
546
self.last_enabled = None
549
logger.debug("Creating client %r", self.name)
281
550
# Uppercase and remove spaces from fingerprint for later
282
551
# comparison purposes with return value from the fingerprint()
284
self.fingerprint = (config[u"fingerprint"].upper()
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
295
raise TypeError(u"No secret or secfile for client %s"
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
553
logger.debug(" Fingerprint: %s", self.fingerprint)
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
557
# attributes specific for this server instance
305
558
self.checker = None
306
559
self.checker_initiator_tag = None
307
560
self.disable_initiator_tag = None
308
561
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
562
self.current_checker_command = None
311
self.last_connect = None
564
self.approvals_pending = 0
565
self.changedstate = (multiprocessing_manager
566
.Condition(multiprocessing_manager
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
570
if not attr.startswith("_")]
571
self.client_structure.append("client_structure")
573
for name, t in inspect.getmembers(type(self),
577
if not name.startswith("_"):
578
self.client_structure.append(name)
580
# Send notice to process children that client state has changed
581
def send_changedstate(self):
582
with self.changedstate:
583
self.changedstate.notify_all()
313
585
def enable(self):
314
586
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
587
if getattr(self, "enabled", False):
316
588
# Already enabled
590
self.expires = datetime.datetime.utcnow() + self.timeout
318
592
self.last_enabled = datetime.datetime.utcnow()
594
self.send_changedstate()
596
def disable(self, quiet=True):
597
"""Disable this client."""
598
if not getattr(self, "enabled", False):
601
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
603
gobject.source_remove(self.disable_initiator_tag)
604
self.disable_initiator_tag = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
607
gobject.source_remove(self.checker_initiator_tag)
608
self.checker_initiator_tag = None
612
self.send_changedstate()
613
# Do not run this again if called by a gobject.timeout_add
619
def init_checker(self):
319
620
# Schedule a new checker to be started an 'interval' from now,
320
621
# and every interval from then on.
622
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
321
624
self.checker_initiator_tag = (gobject.timeout_add
322
625
(self.interval_milliseconds(),
323
626
self.start_checker))
324
# Also start a new checker *right now*.
326
627
# Schedule a disable() when 'timeout' has passed
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
327
630
self.disable_initiator_tag = (gobject.timeout_add
328
631
(self.timeout_milliseconds(),
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
344
if self.disable_hook:
345
self.disable_hook(self)
347
# Do not run this again if called by a gobject.timeout_add
351
self.disable_hook = None
633
# Also start a new checker *right now*.
354
636
def checker_callback(self, pid, condition, command):
355
637
"""The checker has completed, so take appropriate actions."""
356
638
self.checker_callback_tag = None
357
639
self.checker = None
358
640
if os.WIFEXITED(condition):
359
exitstatus = os.WEXITSTATUS(condition)
361
logger.info(u"Checker for %(name)s succeeded",
641
self.last_checker_status = os.WEXITSTATUS(condition)
642
if self.last_checker_status == 0:
643
logger.info("Checker for %(name)s succeeded",
363
645
self.checked_ok()
365
logger.info(u"Checker for %(name)s failed",
647
logger.info("Checker for %(name)s failed",
368
logger.warning(u"Checker for %(name)s crashed?",
650
self.last_checker_status = -1
651
logger.warning("Checker for %(name)s crashed?",
371
654
def checked_ok(self):
372
"""Bump up the timeout for this client.
374
This should only be called when the client has been seen,
655
"""Assert that the client has been seen, alive and well."""
377
656
self.last_checked_ok = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
657
self.last_checker_status = 0
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
663
timeout = self.timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
670
(timeout), self.disable))
671
self.expires = datetime.datetime.utcnow() + timeout
673
def need_approval(self):
674
self.last_approval_request = datetime.datetime.utcnow()
383
676
def start_checker(self):
384
677
"""Start a new checker subprocess if one is not running.
386
679
If a checker already exists, leave it running and do
388
681
# The reason for not killing a running checker is that if we
389
# did that, then if a checker (for some reason) started
390
# running slowly and taking more than 'interval' time, the
391
# client would inevitably timeout, since no checker would get
392
# a chance to run to completion. If we instead leave running
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
393
686
# checkers alone, the checker would have to take more time
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
687
# than 'timeout' for the client to be disabled, which is as it
397
690
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
399
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
695
except OSError as error:
696
if error.errno != errno.ECHILD:
401
logger.warning(u"Checker was a zombie")
700
logger.warning("Checker was a zombie")
402
701
gobject.source_remove(self.checker_callback_tag)
403
702
self.checker_callback(pid, status,
404
703
self.current_checker_command)
405
704
# Start a new checker if needed
406
705
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
710
self.runtime_expansions)
408
# In case checker_command has exactly one % operator
409
command = self.checker_command % self.host
411
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
417
vars(self).iteritems())
419
command = self.checker_command % escaped_attrs
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
423
return True # Try again later
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
424
717
self.current_checker_command = command
426
logger.info(u"Starting checker %r for %s",
719
logger.info("Starting checker %r for %s",
427
720
command, self.name)
428
721
# We don't need to redirect stdout and stderr, since
429
722
# in normal mode, that is already done by daemon(),
430
723
# and in debug mode we don't want to. (Stdin is
431
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
432
733
self.checker = subprocess.Popen(command,
434
shell=True, cwd=u"/")
435
self.checker_callback_tag = (gobject.child_watch_add
437
self.checker_callback,
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
737
except OSError as error:
738
logger.error("Failed to start subprocess",
741
self.checker_callback_tag = (gobject.child_watch_add
743
self.checker_callback,
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
441
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
749
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
448
759
# Re-run this periodically if run by gobject.timeout_add
453
764
if self.checker_callback_tag:
454
765
gobject.source_remove(self.checker_callback_tag)
455
766
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
767
if getattr(self, "checker", None) is None:
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
769
logger.debug("Stopping checker for %(name)s", vars(self))
460
os.kill(self.checker.pid, signal.SIGTERM)
771
self.checker.terminate()
462
773
#if self.checker.poll() is None:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
774
# self.checker.kill()
775
except OSError as error:
465
776
if error.errno != errno.ESRCH: # No such process
467
778
self.checker = None
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
477
return now < (self.last_checked_ok + self.timeout)
480
class ClientDBus(Client, dbus.service.Object):
781
def dbus_service_property(dbus_interface, signature="v",
782
access="readwrite", byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {0!r}".format(signature))
799
func._dbus_is_property = True
800
func._dbus_interface = dbus_interface
801
func._dbus_signature = signature
802
func._dbus_access = access
803
func._dbus_name = func.__name__
804
if func._dbus_name.endswith("_dbus_property"):
805
func._dbus_name = func._dbus_name[:-14]
806
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
834
@dbus_service_property("org.example.Interface", signature="b",
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
843
func._dbus_annotations = annotations
848
class DBusPropertyException(dbus.exceptions.DBusException):
849
"""A base class for D-Bus property-related exceptions
851
def __unicode__(self):
852
return unicode(str(self))
855
class DBusPropertyAccessException(DBusPropertyException):
856
"""A property's access permissions disallows an operation.
861
class DBusPropertyNotFound(DBusPropertyException):
862
"""An attempt was made to access a non-existing property.
867
class DBusObjectWithProperties(dbus.service.Object):
868
"""A D-Bus object with properties.
870
Classes inheriting from this can use the dbus_service_property
871
decorator to expose methods as D-Bus properties. It exposes the
872
standard Get(), Set(), and GetAll() methods on the D-Bus.
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
def _get_all_dbus_things(self, thing):
886
"""Returns a generator of (name, attribute) pairs
888
return ((getattr(athing.__get__(self), "_dbus_name",
890
athing.__get__(self))
891
for cls in self.__class__.__mro__
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
896
def _get_dbus_property(self, interface_name, property_name):
897
"""Returns a bound method if one exists which is a D-Bus
898
property with the specified name and interface.
900
for cls in self.__class__.__mro__:
901
for name, value in (inspect.getmembers
903
self._is_dbus_thing("property"))):
904
if (value._dbus_name == property_name
905
and value._dbus_interface == interface_name):
906
return value.__get__(self)
909
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
+ interface_name + "."
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
915
def Get(self, interface_name, property_name):
916
"""Standard D-Bus property Get() method, see D-Bus standard.
918
prop = self._get_dbus_property(interface_name, property_name)
919
if prop._dbus_access == "write":
920
raise DBusPropertyAccessException(property_name)
922
if not hasattr(value, "variant_level"):
924
return type(value)(value, variant_level=value.variant_level+1)
926
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
927
def Set(self, interface_name, property_name, value):
928
"""Standard D-Bus property Set() method, see D-Bus standard.
930
prop = self._get_dbus_property(interface_name, property_name)
931
if prop._dbus_access == "read":
932
raise DBusPropertyAccessException(property_name)
933
if prop._dbus_get_args_options["byte_arrays"]:
934
# The byte_arrays option is not supported yet on
935
# signatures other than "ay".
936
if prop._dbus_signature != "ay":
938
value = dbus.ByteArray(b''.join(chr(byte)
942
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
943
out_signature="a{sv}")
944
def GetAll(self, interface_name):
945
"""Standard D-Bus property GetAll() method, see D-Bus
948
Note: Will not include properties with access="write".
951
for name, prop in self._get_all_dbus_things("property"):
953
and interface_name != prop._dbus_interface):
954
# Interface non-empty but did not match
956
# Ignore write-only properties
957
if prop._dbus_access == "write":
960
if not hasattr(value, "variant_level"):
961
properties[name] = value
963
properties[name] = type(value)(value, variant_level=
964
value.variant_level+1)
965
return dbus.Dictionary(properties, signature="sv")
967
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
969
path_keyword='object_path',
970
connection_keyword='connection')
971
def Introspect(self, object_path, connection):
972
"""Overloading of standard D-Bus method.
974
Inserts property tags and interface annotation tags.
976
xmlstring = dbus.service.Object.Introspect(self, object_path,
979
document = xml.dom.minidom.parseString(xmlstring)
980
def make_tag(document, name, prop):
981
e = document.createElement("property")
982
e.setAttribute("name", name)
983
e.setAttribute("type", prop._dbus_signature)
984
e.setAttribute("access", prop._dbus_access)
986
for if_tag in document.getElementsByTagName("interface"):
988
for tag in (make_tag(document, name, prop)
990
in self._get_all_dbus_things("property")
991
if prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
if_tag.appendChild(tag)
994
# Add annotation tags
995
for typ in ("method", "signal", "property"):
996
for tag in if_tag.getElementsByTagName(typ):
998
for name, prop in (self.
999
_get_all_dbus_things(typ)):
1000
if (name == tag.getAttribute("name")
1001
and prop._dbus_interface
1002
== if_tag.getAttribute("name")):
1003
annots.update(getattr
1005
"_dbus_annotations",
1007
for name, value in annots.iteritems():
1008
ann_tag = document.createElement(
1010
ann_tag.setAttribute("name", name)
1011
ann_tag.setAttribute("value", value)
1012
tag.appendChild(ann_tag)
1013
# Add interface annotation tags
1014
for annotation, value in dict(
1015
itertools.chain.from_iterable(
1016
annotations().iteritems()
1017
for name, annotations in
1018
self._get_all_dbus_things("interface")
1019
if name == if_tag.getAttribute("name")
1021
ann_tag = document.createElement("annotation")
1022
ann_tag.setAttribute("name", annotation)
1023
ann_tag.setAttribute("value", value)
1024
if_tag.appendChild(ann_tag)
1025
# Add the names to the return values for the
1026
# "org.freedesktop.DBus.Properties" methods
1027
if (if_tag.getAttribute("name")
1028
== "org.freedesktop.DBus.Properties"):
1029
for cn in if_tag.getElementsByTagName("method"):
1030
if cn.getAttribute("name") == "Get":
1031
for arg in cn.getElementsByTagName("arg"):
1032
if (arg.getAttribute("direction")
1034
arg.setAttribute("name", "value")
1035
elif cn.getAttribute("name") == "GetAll":
1036
for arg in cn.getElementsByTagName("arg"):
1037
if (arg.getAttribute("direction")
1039
arg.setAttribute("name", "props")
1040
xmlstring = document.toxml("utf-8")
1042
except (AttributeError, xml.dom.DOMException,
1043
xml.parsers.expat.ExpatError) as error:
1044
logger.error("Failed to override Introspection method",
1049
def datetime_to_dbus(dt, variant_level=0):
1050
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1052
return dbus.String("", variant_level = variant_level)
1053
return dbus.String(dt.isoformat(),
1054
variant_level=variant_level)
1057
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1058
"""A class decorator; applied to a subclass of
1059
dbus.service.Object, it will add alternate D-Bus attributes with
1060
interface names according to the "alt_interface_names" mapping.
1063
@alternate_dbus_interfaces({"org.example.Interface":
1064
"net.example.AlternateInterface"})
1065
class SampleDBusObject(dbus.service.Object):
1066
@dbus.service.method("org.example.Interface")
1067
def SampleDBusMethod():
1070
The above "SampleDBusMethod" on "SampleDBusObject" will be
1071
reachable via two interfaces: "org.example.Interface" and
1072
"net.example.AlternateInterface", the latter of which will have
1073
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1074
"true", unless "deprecate" is passed with a False value.
1076
This works for methods and signals, and also for D-Bus properties
1077
(from DBusObjectWithProperties) and interfaces (from the
1078
dbus_interface_annotations decorator).
1081
for orig_interface_name, alt_interface_name in (
1082
alt_interface_names.iteritems()):
1084
interface_names = set()
1085
# Go though all attributes of the class
1086
for attrname, attribute in inspect.getmembers(cls):
1087
# Ignore non-D-Bus attributes, and D-Bus attributes
1088
# with the wrong interface name
1089
if (not hasattr(attribute, "_dbus_interface")
1090
or not attribute._dbus_interface
1091
.startswith(orig_interface_name)):
1093
# Create an alternate D-Bus interface name based on
1095
alt_interface = (attribute._dbus_interface
1096
.replace(orig_interface_name,
1097
alt_interface_name))
1098
interface_names.add(alt_interface)
1099
# Is this a D-Bus signal?
1100
if getattr(attribute, "_dbus_is_signal", False):
1101
# Extract the original non-method undecorated
1102
# function by black magic
1103
nonmethod_func = (dict(
1104
zip(attribute.func_code.co_freevars,
1105
attribute.__closure__))["func"]
1107
# Create a new, but exactly alike, function
1108
# object, and decorate it to be a new D-Bus signal
1109
# with the alternate D-Bus interface name
1110
new_function = (dbus.service.signal
1112
attribute._dbus_signature)
1113
(types.FunctionType(
1114
nonmethod_func.func_code,
1115
nonmethod_func.func_globals,
1116
nonmethod_func.func_name,
1117
nonmethod_func.func_defaults,
1118
nonmethod_func.func_closure)))
1119
# Copy annotations, if any
1121
new_function._dbus_annotations = (
1122
dict(attribute._dbus_annotations))
1123
except AttributeError:
1125
# Define a creator of a function to call both the
1126
# original and alternate functions, so both the
1127
# original and alternate signals gets sent when
1128
# the function is called
1129
def fixscope(func1, func2):
1130
"""This function is a scope container to pass
1131
func1 and func2 to the "call_both" function
1132
outside of its arguments"""
1133
def call_both(*args, **kwargs):
1134
"""This function will emit two D-Bus
1135
signals by calling func1 and func2"""
1136
func1(*args, **kwargs)
1137
func2(*args, **kwargs)
1139
# Create the "call_both" function and add it to
1141
attr[attrname] = fixscope(attribute, new_function)
1142
# Is this a D-Bus method?
1143
elif getattr(attribute, "_dbus_is_method", False):
1144
# Create a new, but exactly alike, function
1145
# object. Decorate it to be a new D-Bus method
1146
# with the alternate D-Bus interface name. Add it
1148
attr[attrname] = (dbus.service.method
1150
attribute._dbus_in_signature,
1151
attribute._dbus_out_signature)
1153
(attribute.func_code,
1154
attribute.func_globals,
1155
attribute.func_name,
1156
attribute.func_defaults,
1157
attribute.func_closure)))
1158
# Copy annotations, if any
1160
attr[attrname]._dbus_annotations = (
1161
dict(attribute._dbus_annotations))
1162
except AttributeError:
1164
# Is this a D-Bus property?
1165
elif getattr(attribute, "_dbus_is_property", False):
1166
# Create a new, but exactly alike, function
1167
# object, and decorate it to be a new D-Bus
1168
# property with the alternate D-Bus interface
1169
# name. Add it to the class.
1170
attr[attrname] = (dbus_service_property
1172
attribute._dbus_signature,
1173
attribute._dbus_access,
1175
._dbus_get_args_options
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
# Copy annotations, if any
1185
attr[attrname]._dbus_annotations = (
1186
dict(attribute._dbus_annotations))
1187
except AttributeError:
1189
# Is this a D-Bus interface?
1190
elif getattr(attribute, "_dbus_is_interface", False):
1191
# Create a new, but exactly alike, function
1192
# object. Decorate it to be a new D-Bus interface
1193
# with the alternate D-Bus interface name. Add it
1195
attr[attrname] = (dbus_interface_annotations
1198
(attribute.func_code,
1199
attribute.func_globals,
1200
attribute.func_name,
1201
attribute.func_defaults,
1202
attribute.func_closure)))
1204
# Deprecate all alternate interfaces
1205
iname="_AlternateDBusNames_interface_annotation{0}"
1206
for interface_name in interface_names:
1207
@dbus_interface_annotations(interface_name)
1209
return { "org.freedesktop.DBus.Deprecated":
1211
# Find an unused name
1212
for aname in (iname.format(i)
1213
for i in itertools.count()):
1214
if aname not in attr:
1218
# Replace the class with a new subclass of it with
1219
# methods, signals, etc. as created above.
1220
cls = type(b"{0}Alternate".format(cls.__name__),
1226
@alternate_dbus_interfaces({"se.recompile.Mandos":
1227
"se.bsnet.fukt.Mandos"})
1228
class ClientDBus(Client, DBusObjectWithProperties):
481
1229
"""A Client class using D-Bus
484
1232
dbus_object_path: dbus.ObjectPath
485
1233
bus: dbus.SystemBus()
1236
runtime_expansions = (Client.runtime_expansions
1237
+ ("dbus_object_path",))
487
1239
# dbus.service.Object doesn't use super(), so we can't either.
489
1241
def __init__(self, bus = None, *args, **kwargs):
491
1243
Client.__init__(self, *args, **kwargs)
492
1244
# Only now, when this client is initialized, can it show up on
1246
client_object_name = unicode(self.name).translate(
1247
{ord("."): ord("_"),
1248
ord("-"): ord("_")})
494
1249
self.dbus_object_path = (dbus.ObjectPath
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
1250
("/clients/" + client_object_name))
1251
DBusObjectWithProperties.__init__(self, self.bus,
1252
self.dbus_object_path)
1254
def notifychangeproperty(transform_func,
1255
dbus_name, type_func=lambda x: x,
1257
""" Modify a variable so that it's a property which announces
1258
its changes to DBus.
1260
transform_fun: Function that takes a value and a variant_level
1261
and transforms it to a D-Bus type.
1262
dbus_name: D-Bus name of the variable
1263
type_func: Function that transform the value before sending it
1264
to the D-Bus. Default: no transform
1265
variant_level: D-Bus variant level. Default: 1
1267
attrname = "_{0}".format(dbus_name)
1268
def setter(self, value):
1269
if hasattr(self, "dbus_object_path"):
1270
if (not hasattr(self, attrname) or
1271
type_func(getattr(self, attrname, None))
1272
!= type_func(value)):
1273
dbus_value = transform_func(type_func(value),
1276
self.PropertyChanged(dbus.String(dbus_name),
1278
setattr(self, attrname, value)
1280
return property(lambda self: getattr(self, attrname), setter)
1282
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1283
approvals_pending = notifychangeproperty(dbus.Boolean,
1286
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1287
last_enabled = notifychangeproperty(datetime_to_dbus,
1289
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1290
type_func = lambda checker:
1291
checker is not None)
1292
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1294
last_checker_status = notifychangeproperty(dbus.Int16,
1295
"LastCheckerStatus")
1296
last_approval_request = notifychangeproperty(
1297
datetime_to_dbus, "LastApprovalRequest")
1298
approved_by_default = notifychangeproperty(dbus.Boolean,
1299
"ApprovedByDefault")
1300
approval_delay = notifychangeproperty(dbus.UInt64,
1303
timedelta_to_milliseconds)
1304
approval_duration = notifychangeproperty(
1305
dbus.UInt64, "ApprovalDuration",
1306
type_func = timedelta_to_milliseconds)
1307
host = notifychangeproperty(dbus.String, "Host")
1308
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1310
timedelta_to_milliseconds)
1311
extended_timeout = notifychangeproperty(
1312
dbus.UInt64, "ExtendedTimeout",
1313
type_func = timedelta_to_milliseconds)
1314
interval = notifychangeproperty(dbus.UInt64,
1317
timedelta_to_milliseconds)
1318
checker_command = notifychangeproperty(dbus.String, "Checker")
1320
del notifychangeproperty
528
1322
def __del__(self, *args, **kwargs):
530
1324
self.remove_from_connection()
531
1325
except LookupError:
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1327
if hasattr(DBusObjectWithProperties, "__del__"):
1328
DBusObjectWithProperties.__del__(self, *args, **kwargs)
535
1329
Client.__del__(self, *args, **kwargs)
537
1331
def checker_callback(self, pid, condition, command,
538
1332
*args, **kwargs):
539
1333
self.checker_callback_tag = None
540
1334
self.checker = None
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
1335
if os.WIFEXITED(condition):
545
1336
exitstatus = os.WEXITSTATUS(condition)
546
1337
# Emit D-Bus signal
577
1359
and old_checker_pid != self.checker.pid):
578
1360
# Emit D-Bus signal
579
1361
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
598
@dbus.service.method(_interface)
600
return self.checked_ok()
1364
def _reset_approved(self):
1365
self.approved = None
1368
def approve(self, value=True):
1369
self.approved = value
1370
gobject.timeout_add(timedelta_to_milliseconds
1371
(self.approval_duration),
1372
self._reset_approved)
1373
self.send_changedstate()
1375
## D-Bus methods, signals & properties
1376
_interface = "se.recompile.Mandos.Client"
1380
@dbus_interface_annotations(_interface)
1382
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
602
1387
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
1388
@dbus.service.signal(_interface, signature="nxs")
604
1389
def CheckerCompleted(self, exitcode, waitstatus, command):
608
1393
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
1394
@dbus.service.signal(_interface, signature="s")
610
1395
def CheckerStarted(self, command):
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
662
1399
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
1400
@dbus.service.signal(_interface, signature="sv")
664
1401
def PropertyChanged(self, property, value):
668
# ReceivedSecret - signal
1405
# GotSecret - signal
669
1406
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
1407
def GotSecret(self):
1409
Is sent after a successful transfer of secret from the Mandos
1410
server to mandos-client
674
1414
# Rejected - signal
675
@dbus.service.signal(_interface)
1415
@dbus.service.signal(_interface, signature="s")
1416
def Rejected(self, reason):
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
709
@dbus.service.method(_interface, in_signature=u"ay",
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
1420
# NeedApproval - signal
1421
@dbus.service.signal(_interface, signature="tb")
1422
def NeedApproval(self, timeout, default):
1424
return self.need_approval()
1429
@dbus.service.method(_interface, in_signature="b")
1430
def Approve(self, value):
1433
# CheckedOK - method
1434
@dbus.service.method(_interface)
1435
def CheckedOK(self):
724
1438
# Enable - method
725
1439
@dbus.service.method(_interface)
744
1458
def StopChecker(self):
745
1459
self.stop_checker()
1463
# ApprovalPending - property
1464
@dbus_service_property(_interface, signature="b", access="read")
1465
def ApprovalPending_dbus_property(self):
1466
return dbus.Boolean(bool(self.approvals_pending))
1468
# ApprovedByDefault - property
1469
@dbus_service_property(_interface, signature="b",
1471
def ApprovedByDefault_dbus_property(self, value=None):
1472
if value is None: # get
1473
return dbus.Boolean(self.approved_by_default)
1474
self.approved_by_default = bool(value)
1476
# ApprovalDelay - property
1477
@dbus_service_property(_interface, signature="t",
1479
def ApprovalDelay_dbus_property(self, value=None):
1480
if value is None: # get
1481
return dbus.UInt64(self.approval_delay_milliseconds())
1482
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1484
# ApprovalDuration - property
1485
@dbus_service_property(_interface, signature="t",
1487
def ApprovalDuration_dbus_property(self, value=None):
1488
if value is None: # get
1489
return dbus.UInt64(timedelta_to_milliseconds(
1490
self.approval_duration))
1491
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1494
@dbus_service_property(_interface, signature="s", access="read")
1495
def Name_dbus_property(self):
1496
return dbus.String(self.name)
1498
# Fingerprint - property
1499
@dbus_service_property(_interface, signature="s", access="read")
1500
def Fingerprint_dbus_property(self):
1501
return dbus.String(self.fingerprint)
1504
@dbus_service_property(_interface, signature="s",
1506
def Host_dbus_property(self, value=None):
1507
if value is None: # get
1508
return dbus.String(self.host)
1509
self.host = unicode(value)
1511
# Created - property
1512
@dbus_service_property(_interface, signature="s", access="read")
1513
def Created_dbus_property(self):
1514
return datetime_to_dbus(self.created)
1516
# LastEnabled - property
1517
@dbus_service_property(_interface, signature="s", access="read")
1518
def LastEnabled_dbus_property(self):
1519
return datetime_to_dbus(self.last_enabled)
1521
# Enabled - property
1522
@dbus_service_property(_interface, signature="b",
1524
def Enabled_dbus_property(self, value=None):
1525
if value is None: # get
1526
return dbus.Boolean(self.enabled)
1532
# LastCheckedOK - property
1533
@dbus_service_property(_interface, signature="s",
1535
def LastCheckedOK_dbus_property(self, value=None):
1536
if value is not None:
1539
return datetime_to_dbus(self.last_checked_ok)
1541
# LastCheckerStatus - property
1542
@dbus_service_property(_interface, signature="n",
1544
def LastCheckerStatus_dbus_property(self):
1545
return dbus.Int16(self.last_checker_status)
1547
# Expires - property
1548
@dbus_service_property(_interface, signature="s", access="read")
1549
def Expires_dbus_property(self):
1550
return datetime_to_dbus(self.expires)
1552
# LastApprovalRequest - property
1553
@dbus_service_property(_interface, signature="s", access="read")
1554
def LastApprovalRequest_dbus_property(self):
1555
return datetime_to_dbus(self.last_approval_request)
1557
# Timeout - property
1558
@dbus_service_property(_interface, signature="t",
1560
def Timeout_dbus_property(self, value=None):
1561
if value is None: # get
1562
return dbus.UInt64(self.timeout_milliseconds())
1563
old_timeout = self.timeout
1564
self.timeout = datetime.timedelta(0, 0, 0, value)
1565
# Reschedule disabling
1567
now = datetime.datetime.utcnow()
1568
self.expires += self.timeout - old_timeout
1569
if self.expires <= now:
1570
# The timeout has passed
1573
if (getattr(self, "disable_initiator_tag", None)
1576
gobject.source_remove(self.disable_initiator_tag)
1577
self.disable_initiator_tag = (
1578
gobject.timeout_add(
1579
timedelta_to_milliseconds(self.expires - now),
1582
# ExtendedTimeout - property
1583
@dbus_service_property(_interface, signature="t",
1585
def ExtendedTimeout_dbus_property(self, value=None):
1586
if value is None: # get
1587
return dbus.UInt64(self.extended_timeout_milliseconds())
1588
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1590
# Interval - property
1591
@dbus_service_property(_interface, signature="t",
1593
def Interval_dbus_property(self, value=None):
1594
if value is None: # get
1595
return dbus.UInt64(self.interval_milliseconds())
1596
self.interval = datetime.timedelta(0, 0, 0, value)
1597
if getattr(self, "checker_initiator_tag", None) is None:
1600
# Reschedule checker run
1601
gobject.source_remove(self.checker_initiator_tag)
1602
self.checker_initiator_tag = (gobject.timeout_add
1603
(value, self.start_checker))
1604
self.start_checker() # Start one now, too
1606
# Checker - property
1607
@dbus_service_property(_interface, signature="s",
1609
def Checker_dbus_property(self, value=None):
1610
if value is None: # get
1611
return dbus.String(self.checker_command)
1612
self.checker_command = unicode(value)
1614
# CheckerRunning - property
1615
@dbus_service_property(_interface, signature="b",
1617
def CheckerRunning_dbus_property(self, value=None):
1618
if value is None: # get
1619
return dbus.Boolean(self.checker is not None)
1621
self.start_checker()
1625
# ObjectPath - property
1626
@dbus_service_property(_interface, signature="o", access="read")
1627
def ObjectPath_dbus_property(self):
1628
return self.dbus_object_path # is already a dbus.ObjectPath
1631
@dbus_service_property(_interface, signature="ay",
1632
access="write", byte_arrays=True)
1633
def Secret_dbus_property(self, value):
1634
self.secret = str(value)
1639
class ProxyClient(object):
1640
def __init__(self, child_pipe, fpr, address):
1641
self._pipe = child_pipe
1642
self._pipe.send(('init', fpr, address))
1643
if not self._pipe.recv():
1646
def __getattribute__(self, name):
1648
return super(ProxyClient, self).__getattribute__(name)
1649
self._pipe.send(('getattr', name))
1650
data = self._pipe.recv()
1651
if data[0] == 'data':
1653
if data[0] == 'function':
1654
def func(*args, **kwargs):
1655
self._pipe.send(('funcall', name, args, kwargs))
1656
return self._pipe.recv()[1]
1659
def __setattr__(self, name, value):
1661
return super(ProxyClient, self).__setattr__(name, value)
1662
self._pipe.send(('setattr', name, value))
750
1665
class ClientHandler(socketserver.BaseRequestHandler, object):
751
1666
"""A class to handle client connections.
754
1669
Note: This will run in its own forked process."""
756
1671
def handle(self):
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1672
with contextlib.closing(self.server.child_pipe) as child_pipe:
1673
logger.info("TCP connection from: %s",
1674
unicode(self.client_address))
1675
logger.debug("Pipe FD: %d",
1676
self.server.child_pipe.fileno())
762
1678
session = (gnutls.connection
763
1679
.ClientSession(self.request,
764
1680
gnutls.connection
765
1681
.X509Credentials()))
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
770
if int(line.strip().split()[0]) > 1:
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
776
1683
# Note: gnutls.connection.X509Credentials is really a
777
1684
# generic GnuTLS certificate credentials object so long as
778
1685
# no X.509 keys are added to it. Therefore, we can use it
779
1686
# here despite using OpenPGP certificates.
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1688
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1689
# "+AES-256-CBC", "+SHA1",
1690
# "+COMP-NULL", "+CTYPE-OPENPGP",
785
1692
# Use a fallback default, since this MUST be set.
786
1693
priority = self.server.gnutls_priority
787
1694
if priority is None:
789
1696
(gnutls.library.functions
790
1697
.gnutls_priority_set_direct(session._c_object,
791
1698
priority, None))
1700
# Start communication using the Mandos protocol
1701
# Get protocol number
1702
line = self.request.makefile().readline()
1703
logger.debug("Protocol version: %r", line)
1705
if int(line.strip().split()[0]) > 1:
1706
raise RuntimeError(line)
1707
except (ValueError, IndexError, RuntimeError) as error:
1708
logger.error("Unknown protocol version: %s", error)
1711
# Start GnuTLS connection
794
1713
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1714
except gnutls.errors.GNUTLSError as error:
1715
logger.warning("Handshake failed: %s", error)
797
1716
# Do not run session.bye() here: the session is not
798
1717
# established. Just abandon the request.
800
logger.debug(u"Handshake succeeded")
1719
logger.debug("Handshake succeeded")
1721
approval_required = False
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
807
logger.debug(u"Fingerprint: %s", fpr)
1724
fpr = self.fingerprint(self.peer_certificate
1727
gnutls.errors.GNUTLSError) as error:
1728
logger.warning("Bad certificate: %s", error)
1730
logger.debug("Fingerprint: %s", fpr)
1733
client = ProxyClient(child_pipe, fpr,
1734
self.client_address)
1738
if client.approval_delay:
1739
delay = client.approval_delay
1740
client.approvals_pending += 1
1741
approval_required = True
1744
if not client.enabled:
1745
logger.info("Client %s is disabled",
1747
if self.server.use_dbus:
1749
client.Rejected("Disabled")
1752
if client.approved or not client.approval_delay:
1753
#We are approved or approval is disabled
1755
elif client.approved is None:
1756
logger.info("Client %s needs approval",
1758
if self.server.use_dbus:
1760
client.NeedApproval(
1761
client.approval_delay_milliseconds(),
1762
client.approved_by_default)
1764
logger.warning("Client %s was not approved",
1766
if self.server.use_dbus:
1768
client.Rejected("Denied")
1771
#wait until timeout or approved
1772
time = datetime.datetime.now()
1773
client.changedstate.acquire()
1774
client.changedstate.wait(
1775
float(timedelta_to_milliseconds(delay)
1777
client.changedstate.release()
1778
time2 = datetime.datetime.now()
1779
if (time2 - time) >= delay:
1780
if not client.approved_by_default:
1781
logger.warning("Client %s timed out while"
1782
" waiting for approval",
1784
if self.server.use_dbus:
1786
client.Rejected("Approval timed out")
1791
delay -= time2 - time
1794
while sent_size < len(client.secret):
1796
sent = session.send(client.secret[sent_size:])
1797
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("gnutls send failed",
1801
logger.debug("Sent: %d, remaining: %d",
1802
sent, len(client.secret)
1803
- (sent_size + sent))
1806
logger.info("Sending secret to %s", client.name)
1807
# bump the timeout using extended_timeout
1808
client.bump_timeout(client.extended_timeout)
1809
if self.server.use_dbus:
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
825
ipc.write(u"SENDING %s\n" % client.name)
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
1814
if approval_required:
1815
client.approvals_pending -= 1
1818
except gnutls.errors.GNUTLSError as error:
1819
logger.warning("GnuTLS bye failed",
836
1823
def peer_certificate(session):
923
1929
use_ipv6: Boolean; to use IPv6 or not
925
1931
def __init__(self, server_address, RequestHandlerClass,
926
interface=None, use_ipv6=True):
1932
interface=None, use_ipv6=True, socketfd=None):
1933
"""If socketfd is set, use that file descriptor instead of
1934
creating a new one with socket.socket().
927
1936
self.interface = interface
929
1938
self.address_family = socket.AF_INET6
1939
if socketfd is not None:
1940
# Save the file descriptor
1941
self.socketfd = socketfd
1942
# Save the original socket.socket() function
1943
self.socket_socket = socket.socket
1944
# To implement --socket, we monkey patch socket.socket.
1946
# (When socketserver.TCPServer is a new-style class, we
1947
# could make self.socket into a property instead of monkey
1948
# patching socket.socket.)
1950
# Create a one-time-only replacement for socket.socket()
1951
@functools.wraps(socket.socket)
1952
def socket_wrapper(*args, **kwargs):
1953
# Restore original function so subsequent calls are
1955
socket.socket = self.socket_socket
1956
del self.socket_socket
1957
# This time only, return a new socket object from the
1958
# saved file descriptor.
1959
return socket.fromfd(self.socketfd, *args, **kwargs)
1960
# Replace socket.socket() function with wrapper
1961
socket.socket = socket_wrapper
1962
# The socketserver.TCPServer.__init__ will call
1963
# socket.socket(), which might be our replacement,
1964
# socket_wrapper(), if socketfd was set.
930
1965
socketserver.TCPServer.__init__(self, server_address,
931
1966
RequestHandlerClass)
932
1968
def server_bind(self):
933
1969
"""This overrides the normal server_bind() function
934
1970
to bind to an interface if one was specified, and also NOT to
935
1971
bind to an address or port if they were not specified."""
936
1972
if self.interface is not None:
937
1973
if SO_BINDTODEVICE is None:
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
1974
logger.error("SO_BINDTODEVICE does not exist;"
1975
" cannot bind to interface %s",
943
1979
self.socket.setsockopt(socket.SOL_SOCKET,
944
1980
SO_BINDTODEVICE,
947
except socket.error, error:
948
if error[0] == errno.EPERM:
949
logger.error(u"No permission to"
950
u" bind to interface %s",
952
elif error[0] == errno.ENOPROTOOPT:
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
1981
str(self.interface + '\0'))
1982
except socket.error as error:
1983
if error.errno == errno.EPERM:
1984
logger.error("No permission to bind to"
1985
" interface %s", self.interface)
1986
elif error.errno == errno.ENOPROTOOPT:
1987
logger.error("SO_BINDTODEVICE not available;"
1988
" cannot bind to interface %s",
1990
elif error.errno == errno.ENODEV:
1991
logger.error("Interface %s does not exist,"
1992
" cannot bind", self.interface)
958
1995
# Only bind(2) the socket if we really need to.
959
1996
if self.server_address[0] or self.server_address[1]:
960
1997
if not self.server_address[0]:
961
1998
if self.address_family == socket.AF_INET6:
962
any_address = u"::" # in6addr_any
1999
any_address = "::" # in6addr_any
964
any_address = socket.INADDR_ANY
2001
any_address = "0.0.0.0" # INADDR_ANY
965
2002
self.server_address = (any_address,
966
2003
self.server_address[1])
967
2004
elif not self.server_address[1]:
983
2020
clients: set of Client objects
984
2021
gnutls_priority GnuTLS priority string
985
2022
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
990
2024
Assumes a gobject.MainLoop event loop.
992
2026
def __init__(self, server_address, RequestHandlerClass,
993
2027
interface=None, use_ipv6=True, clients=None,
994
gnutls_priority=None, use_dbus=True):
2028
gnutls_priority=None, use_dbus=True, socketfd=None):
995
2029
self.enabled = False
996
2030
self.clients = clients
997
2031
if self.clients is None:
999
2033
self.use_dbus = use_dbus
1000
2034
self.gnutls_priority = gnutls_priority
1001
2035
IPv6_TCPServer.__init__(self, server_address,
1002
2036
RequestHandlerClass,
1003
2037
interface = interface,
1004
use_ipv6 = use_ipv6)
2038
use_ipv6 = use_ipv6,
2039
socketfd = socketfd)
1005
2040
def server_activate(self):
1006
2041
if self.enabled:
1007
2042
return socketserver.TCPServer.server_activate(self)
1008
2044
def enable(self):
1009
2045
self.enabled = True
1010
def add_pipe(self, pipe):
2047
def add_pipe(self, parent_pipe, proc):
1011
2048
# Call "handle_ipc" for both data and EOF events
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1014
def handle_ipc(self, source, condition, file_objects={}):
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1022
# broken, usually for pipes and
1025
conditions_string = ' | '.join(name
1027
condition_names.iteritems()
1028
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1043
# Stop calling this function
1046
logger.debug(u"IPC command: %r", cmdline)
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1074
client.ReceivedSecret()
1077
logger.error(u"Sending secret to unknown client %s",
2049
gobject.io_add_watch(parent_pipe.fileno(),
2050
gobject.IO_IN | gobject.IO_HUP,
2051
functools.partial(self.handle_ipc,
2056
def handle_ipc(self, source, condition, parent_pipe=None,
2057
proc = None, client_object=None):
2058
# error, or the other end of multiprocessing.Pipe has closed
2059
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2060
# Wait for other process to exit
2064
# Read a request from the child
2065
request = parent_pipe.recv()
2066
command = request[0]
2068
if command == 'init':
2070
address = request[2]
2072
for c in self.clients.itervalues():
2073
if c.fingerprint == fpr:
2077
logger.info("Client not found for fingerprint: %s, ad"
2078
"dress: %s", fpr, address)
2081
mandos_dbus_service.ClientNotFound(fpr,
2083
parent_pipe.send(False)
2086
gobject.io_add_watch(parent_pipe.fileno(),
2087
gobject.IO_IN | gobject.IO_HUP,
2088
functools.partial(self.handle_ipc,
2094
parent_pipe.send(True)
2095
# remove the old hook in favor of the new above hook on
2098
if command == 'funcall':
2099
funcname = request[1]
2103
parent_pipe.send(('data', getattr(client_object,
2107
if command == 'getattr':
2108
attrname = request[1]
2109
if callable(client_object.__getattribute__(attrname)):
2110
parent_pipe.send(('function',))
2112
parent_pipe.send(('data', client_object
2113
.__getattribute__(attrname)))
2115
if command == 'setattr':
2116
attrname = request[1]
2118
setattr(client_object, attrname, value)
2123
def rfc3339_duration_to_delta(duration):
2124
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2126
>>> rfc3339_duration_to_delta("P7D")
2127
datetime.timedelta(7)
2128
>>> rfc3339_duration_to_delta("PT60S")
2129
datetime.timedelta(0, 60)
2130
>>> rfc3339_duration_to_delta("PT60M")
2131
datetime.timedelta(0, 3600)
2132
>>> rfc3339_duration_to_delta("PT24H")
2133
datetime.timedelta(1)
2134
>>> rfc3339_duration_to_delta("P1W")
2135
datetime.timedelta(7)
2136
>>> rfc3339_duration_to_delta("PT5M30S")
2137
datetime.timedelta(0, 330)
2138
>>> rfc3339_duration_to_delta("P1DT3M20S")
2139
datetime.timedelta(1, 200)
2142
# Parsing an RFC 3339 duration with regular expressions is not
2143
# possible - there would have to be multiple places for the same
2144
# values, like seconds. The current code, while more esoteric, is
2145
# cleaner without depending on a parsing library. If Python had a
2146
# built-in library for parsing we would use it, but we'd like to
2147
# avoid excessive use of external libraries.
2149
# New type for defining tokens, syntax, and semantics all-in-one
2150
Token = collections.namedtuple("Token",
2151
("regexp", # To match token; if
2152
# "value" is not None,
2153
# must have a "group"
2155
"value", # datetime.timedelta or
2157
"followers")) # Tokens valid after
2159
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
# the "duration" ABNF definition in RFC 3339, Appendix A.
2161
token_end = Token(re.compile(r"$"), None, frozenset())
2162
token_second = Token(re.compile(r"(\d+)S"),
2163
datetime.timedelta(seconds=1),
2164
frozenset((token_end,)))
2165
token_minute = Token(re.compile(r"(\d+)M"),
2166
datetime.timedelta(minutes=1),
2167
frozenset((token_second, token_end)))
2168
token_hour = Token(re.compile(r"(\d+)H"),
2169
datetime.timedelta(hours=1),
2170
frozenset((token_minute, token_end)))
2171
token_time = Token(re.compile(r"T"),
2173
frozenset((token_hour, token_minute,
2175
token_day = Token(re.compile(r"(\d+)D"),
2176
datetime.timedelta(days=1),
2177
frozenset((token_time, token_end)))
2178
token_month = Token(re.compile(r"(\d+)M"),
2179
datetime.timedelta(weeks=4),
2180
frozenset((token_day, token_end)))
2181
token_year = Token(re.compile(r"(\d+)Y"),
2182
datetime.timedelta(weeks=52),
2183
frozenset((token_month, token_end)))
2184
token_week = Token(re.compile(r"(\d+)W"),
2185
datetime.timedelta(weeks=1),
2186
frozenset((token_end,)))
2187
token_duration = Token(re.compile(r"P"), None,
2188
frozenset((token_year, token_month,
2189
token_day, token_time,
2191
# Define starting values
2192
value = datetime.timedelta() # Value so far
2194
followers = frozenset(token_duration,) # Following valid tokens
2195
s = duration # String left to parse
2196
# Loop until end token is found
2197
while found_token is not token_end:
2198
# Search for any currently valid tokens
2199
for token in followers:
2200
match = token.regexp.match(s)
2201
if match is not None:
2203
if token.value is not None:
2204
# Value found, parse digits
2205
factor = int(match.group(1), 10)
2206
# Add to value so far
2207
value += factor * token.value
2208
# Strip token from string
2209
s = token.regexp.sub("", s, 1)
2212
# Set valid next tokens
2213
followers = found_token.followers
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1082
# Keep calling this function
2216
# No currently valid tokens were found
2217
raise ValueError("Invalid RFC 3339 duration")
1086
2222
def string_to_delta(interval):
1087
2223
"""Parse a string and return a datetime.timedelta
1089
>>> string_to_delta(u'7d')
2225
>>> string_to_delta('7d')
1090
2226
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
2227
>>> string_to_delta('60s')
1092
2228
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
2229
>>> string_to_delta('60m')
1094
2230
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
2231
>>> string_to_delta('24h')
1096
2232
datetime.timedelta(1)
1097
>>> string_to_delta(u'1w')
2233
>>> string_to_delta('1w')
1098
2234
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
2235
>>> string_to_delta('5m 30s')
1100
2236
datetime.timedelta(0, 330)
2240
return rfc3339_duration_to_delta(interval)
1102
2244
timevalue = datetime.timedelta(0)
1103
2245
for s in interval.split():
1105
2247
suffix = unicode(s[-1])
1106
2248
value = int(s[:-1])
1108
2250
delta = datetime.timedelta(value)
1109
elif suffix == u"s":
1110
2252
delta = datetime.timedelta(0, value)
1111
elif suffix == u"m":
1112
2254
delta = datetime.timedelta(0, 0, 0, 0, value)
1113
elif suffix == u"h":
1114
2256
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1115
elif suffix == u"w":
1116
2258
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1119
except (ValueError, IndexError):
2260
raise ValueError("Unknown suffix {0!r}"
2262
except IndexError as e:
2263
raise ValueError(*(e.args))
1121
2264
timevalue += delta
1122
2265
return timevalue
1125
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1128
Note: This function cannot accept a unicode string."""
1129
global if_nametoindex
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
1134
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
1136
def if_nametoindex(interface):
1137
"Get an interface index the hard way, i.e. using fcntl()"
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
with closing(socket.socket()) as s:
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1143
interface_index = struct.unpack(str(u"I"),
1145
return interface_index
1146
return if_nametoindex(interface)
1149
2268
def daemon(nochdir = False, noclose = False):
1150
2269
"""See daemon(3). Standard BSD Unix function.
1175
######################################################################
2295
##################################################################
1176
2296
# Parsing of options, both command line and config file
1178
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1198
parser.add_option("--no-dbus", action=u"store_false",
1200
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
1203
options = parser.parse_args()[0]
2298
parser = argparse.ArgumentParser()
2299
parser.add_argument("-v", "--version", action="version",
2300
version = "%(prog)s {0}".format(version),
2301
help="show version number and exit")
2302
parser.add_argument("-i", "--interface", metavar="IF",
2303
help="Bind to interface IF")
2304
parser.add_argument("-a", "--address",
2305
help="Address to listen for requests on")
2306
parser.add_argument("-p", "--port", type=int,
2307
help="Port number to receive requests on")
2308
parser.add_argument("--check", action="store_true",
2309
help="Run self-test")
2310
parser.add_argument("--debug", action="store_true",
2311
help="Debug mode; run in foreground and log"
2312
" to terminal", default=None)
2313
parser.add_argument("--debuglevel", metavar="LEVEL",
2314
help="Debug level for stdout output")
2315
parser.add_argument("--priority", help="GnuTLS"
2316
" priority string (see GnuTLS documentation)")
2317
parser.add_argument("--servicename",
2318
metavar="NAME", help="Zeroconf service name")
2319
parser.add_argument("--configdir",
2320
default="/etc/mandos", metavar="DIR",
2321
help="Directory to search for configuration"
2323
parser.add_argument("--no-dbus", action="store_false",
2324
dest="use_dbus", help="Do not provide D-Bus"
2325
" system bus interface", default=None)
2326
parser.add_argument("--no-ipv6", action="store_false",
2327
dest="use_ipv6", help="Do not use IPv6",
2329
parser.add_argument("--no-restore", action="store_false",
2330
dest="restore", help="Do not restore stored"
2331
" state", default=None)
2332
parser.add_argument("--socket", type=int,
2333
help="Specify a file descriptor to a network"
2334
" socket to use instead of creating one")
2335
parser.add_argument("--statedir", metavar="DIR",
2336
help="Directory to save/restore state in")
2337
parser.add_argument("--foreground", action="store_true",
2338
help="Run in foreground", default=None)
2340
options = parser.parse_args()
1205
2342
if options.check:
1248
2400
for option in server_settings.keys():
1249
2401
if type(server_settings[option]) is str:
1250
2402
server_settings[option] = unicode(server_settings[option])
2403
# Force all boolean options to be boolean
2404
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2406
server_settings[option] = bool(server_settings[option])
2407
# Debug implies foreground
2408
if server_settings["debug"]:
2409
server_settings["foreground"] = True
1251
2410
# Now we have our good server settings in "server_settings"
1253
2412
##################################################################
1255
2414
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_dbus = False # XXX: Not done yet
1259
use_ipv6 = server_settings[u"use_ipv6"]
1262
syslogger.setLevel(logging.WARNING)
1263
console.setLevel(logging.WARNING)
1265
if server_settings[u"servicename"] != u"Mandos":
2415
debug = server_settings["debug"]
2416
debuglevel = server_settings["debuglevel"]
2417
use_dbus = server_settings["use_dbus"]
2418
use_ipv6 = server_settings["use_ipv6"]
2419
stored_state_path = os.path.join(server_settings["statedir"],
2421
foreground = server_settings["foreground"]
2424
initlogger(debug, logging.DEBUG)
2429
level = getattr(logging, debuglevel.upper())
2430
initlogger(debug, level)
2432
if server_settings["servicename"] != "Mandos":
1266
2433
syslogger.setFormatter(logging.Formatter
1267
(u'Mandos (%s) [%%(process)d]:'
1268
u' %%(levelname)s: %%(message)s'
1269
% server_settings[u"servicename"]))
2434
('Mandos ({0}) [%(process)d]:'
2435
' %(levelname)s: %(message)s'
2436
.format(server_settings
1271
2439
# Parse config file with clients
1272
client_defaults = { u"timeout": u"1h",
1274
u"checker": u"fping -q -- %%(host)s",
1277
client_config = configparser.SafeConfigParser(client_defaults)
1278
client_config.read(os.path.join(server_settings[u"configdir"],
2440
client_config = configparser.SafeConfigParser(Client
2442
client_config.read(os.path.join(server_settings["configdir"],
1281
2445
global mandos_dbus_service
1282
2446
mandos_dbus_service = None
1284
tcp_server = MandosServer((server_settings[u"address"],
1285
server_settings[u"port"]),
2448
tcp_server = MandosServer((server_settings["address"],
2449
server_settings["port"]),
1287
interface=server_settings[u"interface"],
2451
interface=(server_settings["interface"]
1288
2453
use_ipv6=use_ipv6,
1289
2454
gnutls_priority=
1290
server_settings[u"priority"],
1292
pidfilename = u"/var/run/mandos.pid"
1294
pidfile = open(pidfilename, u"w")
1296
logger.error(u"Could not open file %r", pidfilename)
2455
server_settings["priority"],
2457
socketfd=(server_settings["socket"]
2460
pidfilename = "/run/mandos.pid"
2461
if not os.path.isdir("/run/."):
2462
pidfilename = "/var/run/mandos.pid"
2465
pidfile = open(pidfilename, "w")
2466
except IOError as e:
2467
logger.error("Could not open file %r", pidfilename,
1299
uid = pwd.getpwnam(u"_mandos").pw_uid
1300
gid = pwd.getpwnam(u"_mandos").pw_gid
2470
for name in ("_mandos", "mandos", "nobody"):
1303
uid = pwd.getpwnam(u"mandos").pw_uid
1304
gid = pwd.getpwnam(u"mandos").pw_gid
2472
uid = pwd.getpwnam(name).pw_uid
2473
gid = pwd.getpwnam(name).pw_gid
1305
2475
except KeyError:
1307
uid = pwd.getpwnam(u"nobody").pw_uid
1308
gid = pwd.getpwnam(u"nobody").pw_gid
1315
except OSError, error:
1316
if error[0] != errno.EPERM:
2483
except OSError as error:
2484
if error.errno != errno.EPERM:
1319
# Enable all possible GnuTLS debugging
2488
# Enable all possible GnuTLS debugging
1321
2490
# "Use a log level over 10 to enable all debugging options."
1322
2491
# - GnuTLS manual
1323
2492
gnutls.library.functions.gnutls_global_set_log_level(11)
1325
2494
@gnutls.library.types.gnutls_log_func
1326
2495
def debug_gnutls(level, string):
1327
logger.debug(u"GnuTLS: %s", string[:-1])
2496
logger.debug("GnuTLS: %s", string[:-1])
1329
2498
(gnutls.library.functions
1330
2499
.gnutls_global_set_log_function(debug_gnutls))
2501
# Redirect stdin so all checkers get /dev/null
2502
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2503
os.dup2(null, sys.stdin.fileno())
2507
# Need to fork before connecting to D-Bus
2509
# Close all input and output, do double fork, etc.
2512
# multiprocessing will use threads, so before we use gobject we
2513
# need to inform gobject that threads will be used.
2514
gobject.threads_init()
1332
2516
global main_loop
1333
2517
# From the Avahi example code
1334
DBusGMainLoop(set_as_default=True )
2518
DBusGMainLoop(set_as_default=True)
1335
2519
main_loop = gobject.MainLoop()
1336
2520
bus = dbus.SystemBus()
1337
2521
# End of Avahi example code
1339
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2524
bus_name = dbus.service.BusName("se.recompile.Mandos",
2525
bus, do_not_queue=True)
2526
old_bus_name = (dbus.service.BusName
2527
("se.bsnet.fukt.Mandos", bus,
2529
except dbus.exceptions.NameExistsException as e:
2530
logger.error("Disabling D-Bus:", exc_info=e)
2532
server_settings["use_dbus"] = False
2533
tcp_server.use_dbus = False
1340
2534
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1341
service = AvahiService(name = server_settings[u"servicename"],
1342
servicetype = u"_mandos._tcp",
1343
protocol = protocol, bus = bus)
2535
service = AvahiServiceToSyslog(name =
2536
server_settings["servicename"],
2537
servicetype = "_mandos._tcp",
2538
protocol = protocol, bus = bus)
1344
2539
if server_settings["interface"]:
1345
2540
service.interface = (if_nametoindex
1346
(str(server_settings[u"interface"])))
2541
(str(server_settings["interface"])))
2543
global multiprocessing_manager
2544
multiprocessing_manager = multiprocessing.Manager()
1348
2546
client_class = Client
1350
2548
client_class = functools.partial(ClientDBus, bus = bus)
1351
tcp_server.clients.update(set(
1352
client_class(name = section,
1353
config= dict(client_config.items(section)))
1354
for section in client_config.sections()))
2550
client_settings = Client.config_parser(client_config)
2551
old_client_settings = {}
2554
# This is used to redirect stdout and stderr for checker processes
2556
wnull = open(os.devnull, "w") # A writable /dev/null
2557
# Only used if server is running in foreground but not in debug
2559
if debug or not foreground:
2562
# Get client data and settings from last running state.
2563
if server_settings["restore"]:
2565
with open(stored_state_path, "rb") as stored_state:
2566
clients_data, old_client_settings = (pickle.load
2568
os.remove(stored_state_path)
2569
except IOError as e:
2570
if e.errno == errno.ENOENT:
2571
logger.warning("Could not load persistent state: {0}"
2572
.format(os.strerror(e.errno)))
2574
logger.critical("Could not load persistent state:",
2577
except EOFError as e:
2578
logger.warning("Could not load persistent state: "
2579
"EOFError:", exc_info=e)
2581
with PGPEngine() as pgp:
2582
for client_name, client in clients_data.iteritems():
2583
# Skip removed clients
2584
if client_name not in client_settings:
2587
# Decide which value to use after restoring saved state.
2588
# We have three different values: Old config file,
2589
# new config file, and saved state.
2590
# New config value takes precedence if it differs from old
2591
# config value, otherwise use saved state.
2592
for name, value in client_settings[client_name].items():
2594
# For each value in new config, check if it
2595
# differs from the old config value (Except for
2596
# the "secret" attribute)
2597
if (name != "secret" and
2598
value != old_client_settings[client_name]
2600
client[name] = value
2604
# Clients who has passed its expire date can still be
2605
# enabled if its last checker was successful. Clients
2606
# whose checker succeeded before we stored its state is
2607
# assumed to have successfully run all checkers during
2609
if client["enabled"]:
2610
if datetime.datetime.utcnow() >= client["expires"]:
2611
if not client["last_checked_ok"]:
2613
"disabling client {0} - Client never "
2614
"performed a successful checker"
2615
.format(client_name))
2616
client["enabled"] = False
2617
elif client["last_checker_status"] != 0:
2619
"disabling client {0} - Client "
2620
"last checker failed with error code {1}"
2621
.format(client_name,
2622
client["last_checker_status"]))
2623
client["enabled"] = False
2625
client["expires"] = (datetime.datetime
2627
+ client["timeout"])
2628
logger.debug("Last checker succeeded,"
2629
" keeping {0} enabled"
2630
.format(client_name))
2632
client["secret"] = (
2633
pgp.decrypt(client["encrypted_secret"],
2634
client_settings[client_name]
2637
# If decryption fails, we use secret from new settings
2638
logger.debug("Failed to decrypt {0} old secret"
2639
.format(client_name))
2640
client["secret"] = (
2641
client_settings[client_name]["secret"])
2643
# Add/remove clients based on new changes made to config
2644
for client_name in (set(old_client_settings)
2645
- set(client_settings)):
2646
del clients_data[client_name]
2647
for client_name in (set(client_settings)
2648
- set(old_client_settings)):
2649
clients_data[client_name] = client_settings[client_name]
2651
# Create all client objects
2652
for client_name, client in clients_data.iteritems():
2653
tcp_server.clients[client_name] = client_class(
2654
name = client_name, settings = client,
2655
server_settings = server_settings)
1355
2657
if not tcp_server.clients:
1356
logger.warning(u"No clients defined")
1359
# Redirect stdin so all checkers get /dev/null
1360
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1361
os.dup2(null, sys.stdin.fileno())
1365
# No console logging
1366
logger.removeHandler(console)
1367
# Close all input and output, do double fork, etc.
1371
with closing(pidfile):
1373
pidfile.write(str(pid) + "\n")
2658
logger.warning("No clients defined")
2661
if pidfile is not None:
2665
pidfile.write(str(pid) + "\n".encode("utf-8"))
2667
logger.error("Could not write to file %r with PID %d",
1376
logger.error(u"Could not write to file %r with PID %d",
1379
# "pidfile" was never created
1384
"Cleanup function; run on exit"
1387
while tcp_server.clients:
1388
client = tcp_server.clients.pop()
1389
client.disable_hook = None
1392
atexit.register(cleanup)
1395
signal.signal(signal.SIGINT, signal.SIG_IGN)
1396
2672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1397
2673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1400
class MandosDBusService(dbus.service.Object):
2676
@alternate_dbus_interfaces({"se.recompile.Mandos":
2677
"se.bsnet.fukt.Mandos"})
2678
class MandosDBusService(DBusObjectWithProperties):
1401
2679
"""A D-Bus proxy object"""
1402
2680
def __init__(self):
1403
dbus.service.Object.__init__(self, bus, u"/")
1404
_interface = u"se.bsnet.fukt.Mandos"
1406
@dbus.service.signal(_interface, signature=u"oa{sv}")
1407
def ClientAdded(self, objpath, properties):
1411
@dbus.service.signal(_interface, signature=u"s")
1412
def ClientNotFound(self, fingerprint):
1416
@dbus.service.signal(_interface, signature=u"os")
2681
dbus.service.Object.__init__(self, bus, "/")
2682
_interface = "se.recompile.Mandos"
2684
@dbus_interface_annotations(_interface)
2686
return { "org.freedesktop.DBus.Property"
2687
".EmitsChangedSignal":
2690
@dbus.service.signal(_interface, signature="o")
2691
def ClientAdded(self, objpath):
2695
@dbus.service.signal(_interface, signature="ss")
2696
def ClientNotFound(self, fingerprint, address):
2700
@dbus.service.signal(_interface, signature="os")
1417
2701
def ClientRemoved(self, objpath, name):
1421
@dbus.service.method(_interface, out_signature=u"ao")
2705
@dbus.service.method(_interface, out_signature="ao")
1422
2706
def GetAllClients(self):
1424
2708
return dbus.Array(c.dbus_object_path
1425
for c in tcp_server.clients)
2710
tcp_server.clients.itervalues())
1427
2712
@dbus.service.method(_interface,
1428
out_signature=u"a{oa{sv}}")
2713
out_signature="a{oa{sv}}")
1429
2714
def GetAllClientsWithProperties(self):
1431
2716
return dbus.Dictionary(
1432
((c.dbus_object_path, c.GetAllProperties())
1433
for c in tcp_server.clients),
1434
signature=u"oa{sv}")
2717
((c.dbus_object_path, c.GetAll(""))
2718
for c in tcp_server.clients.itervalues()),
1436
@dbus.service.method(_interface, in_signature=u"o")
2721
@dbus.service.method(_interface, in_signature="o")
1437
2722
def RemoveClient(self, object_path):
1439
for c in tcp_server.clients:
2724
for c in tcp_server.clients.itervalues():
1440
2725
if c.dbus_object_path == object_path:
1441
tcp_server.clients.remove(c)
2726
del tcp_server.clients[c.name]
1442
2727
c.remove_from_connection()
1443
2728
# Don't signal anything except ClientRemoved
1444
c.disable(signal=False)
2729
c.disable(quiet=True)
1445
2730
# Emit D-Bus signal
1446
2731
self.ClientRemoved(object_path, c.name)
2733
raise KeyError(object_path)
1452
2737
mandos_dbus_service = MandosDBusService()
1454
for client in tcp_server.clients:
2740
"Cleanup function; run on exit"
2743
multiprocessing.active_children()
2745
if not (tcp_server.clients or client_settings):
2748
# Store client before exiting. Secrets are encrypted with key
2749
# based on what config file has. If config file is
2750
# removed/edited, old secret will thus be unrecovable.
2752
with PGPEngine() as pgp:
2753
for client in tcp_server.clients.itervalues():
2754
key = client_settings[client.name]["secret"]
2755
client.encrypted_secret = pgp.encrypt(client.secret,
2759
# A list of attributes that can not be pickled
2761
exclude = set(("bus", "changedstate", "secret",
2762
"checker", "server_settings"))
2763
for name, typ in (inspect.getmembers
2764
(dbus.service.Object)):
2767
client_dict["encrypted_secret"] = (client
2769
for attr in client.client_structure:
2770
if attr not in exclude:
2771
client_dict[attr] = getattr(client, attr)
2773
clients[client.name] = client_dict
2774
del client_settings[client.name]["secret"]
2777
with (tempfile.NamedTemporaryFile
2778
(mode='wb', suffix=".pickle", prefix='clients-',
2779
dir=os.path.dirname(stored_state_path),
2780
delete=False)) as stored_state:
2781
pickle.dump((clients, client_settings), stored_state)
2782
tempname=stored_state.name
2783
os.rename(tempname, stored_state_path)
2784
except (IOError, OSError) as e:
2790
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
logger.warning("Could not save persistent state: {0}"
2792
.format(os.strerror(e.errno)))
2794
logger.warning("Could not save persistent state:",
2798
# Delete all clients, and settings from config
2799
while tcp_server.clients:
2800
name, client = tcp_server.clients.popitem()
2802
client.remove_from_connection()
2803
# Don't signal anything except ClientRemoved
2804
client.disable(quiet=True)
2807
mandos_dbus_service.ClientRemoved(client
2810
client_settings.clear()
2812
atexit.register(cleanup)
2814
for client in tcp_server.clients.itervalues():
1456
2816
# Emit D-Bus signal
1457
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1458
client.GetAllProperties())
2817
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2818
# Need to initiate checking of clients
2820
client.init_checker()
1461
2822
tcp_server.enable()
1462
2823
tcp_server.server_activate()