79
86
SO_BINDTODEVICE = None
90
stored_state_path = "/var/lib/mandos/clients.pickle"
84
logger = logging.Logger(u'mandos')
92
logger = logging.getLogger()
85
93
syslogger = (logging.handlers.SysLogHandler
86
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
91
logger.addHandler(syslogger)
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
logger.addHandler(console)
95
address = str("/dev/log")))
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
111
return interface_index
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
120
logger.addHandler(syslogger)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
128
logger.setLevel(level)
131
class CryptoError(Exception):
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
149
def __exit__ (self, exc_type, exc_value, traceback):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
161
for filename in files:
162
os.remove(os.path.join(root, filename))
164
os.rmdir(os.path.join(root, dirname))
166
os.rmdir(self.tempdir)
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
188
self.gnupg.passphrase = None
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
99
210
class AvahiError(Exception):
100
211
def __init__(self, value, *args, **kwargs):
191
309
self.group.Commit()
192
310
def entry_group_state_changed(self, state, error):
193
311
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
312
logger.debug("Avahi entry group state change: %i", state)
196
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
315
logger.debug("Zeroconf service established.")
198
316
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
317
logger.info("Zeroconf service name collision.")
201
319
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
320
logger.critical("Avahi: Error in group state changed %s",
204
raise AvahiGroupError(u"State changed: %s"
322
raise AvahiGroupError("State changed: %s"
205
323
% unicode(error))
206
324
def cleanup(self):
207
325
"""Derived from the Avahi example code"""
208
326
if self.group is not None:
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
210
332
self.group = None
211
def server_state_changed(self, state):
334
def server_state_changed(self, state, error=None):
212
335
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
347
logger.error(bad_states[state])
349
logger.error(bad_states[state] + ": %r", error)
216
351
elif state == avahi.SERVER_RUNNING:
355
logger.debug("Unknown state: %r", state)
357
logger.debug("Unknown state: %r: %r", state, error)
218
358
def activate(self):
219
359
"""Derived from the Avahi example code"""
220
360
if self.server is None:
221
361
self.server = dbus.Interface(
222
362
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
224
365
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
366
self.server.connect_to_signal("StateChanged",
226
367
self.server_state_changed)
227
368
self.server_state_changed(self.server.GetState())
370
class AvahiServiceToSyslog(AvahiService):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
380
def _timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
230
386
class Client(object):
231
387
"""A representation of a client host served by this server.
234
name: string; from the config file, used in log messages and
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
390
_approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
248
393
checker: subprocess.Popen(); a running checker process used
249
394
to see if the client lives.
250
395
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
256
399
runtime with vars(self) as dict, so that for
257
400
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
258
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
418
last_enabled: datetime.datetime(); (UTC)
419
name: string; from the config file, used in log messages and
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
268
435
def timeout_milliseconds(self):
269
436
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
437
return _timedelta_to_milliseconds(self.timeout)
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return _timedelta_to_milliseconds(self.extended_timeout)
272
443
def interval_milliseconds(self):
273
444
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
276
def __init__(self, name = None, disable_hook=None, config=None):
445
return _timedelta_to_milliseconds(self.interval)
447
def approval_delay_milliseconds(self):
448
return _timedelta_to_milliseconds(self.approval_delay)
450
def __init__(self, name = None, config=None):
277
451
"""Note: the 'checker' key in 'config' sets the
278
452
'checker_command' attribute and *not* the 'checker'
281
455
if config is None:
283
logger.debug(u"Creating client %r", self.name)
457
logger.debug("Creating client %r", self.name)
284
458
# Uppercase and remove spaces from fingerprint for later
285
459
# comparison purposes with return value from the fingerprint()
287
self.fingerprint = (config[u"fingerprint"].upper()
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
295
(config[u"secfile"])),
461
self.fingerprint = (config["fingerprint"].upper()
463
logger.debug(" Fingerprint: %s", self.fingerprint)
464
if "secret" in config:
465
self.secret = config["secret"].decode("base64")
466
elif "secfile" in config:
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
297
470
self.secret = secfile.read()
299
raise TypeError(u"No secret or secfile for client %s"
472
raise TypeError("No secret or secfile for client %s"
301
self.host = config.get(u"host", u"")
474
self.host = config.get("host", "")
302
475
self.created = datetime.datetime.utcnow()
304
self.last_enabled = None
477
self.last_approval_request = None
478
self.last_enabled = datetime.datetime.utcnow()
305
479
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
480
self.last_checker_status = None
481
self.timeout = string_to_delta(config["timeout"])
482
self.extended_timeout = string_to_delta(config
483
["extended_timeout"])
484
self.interval = string_to_delta(config["interval"])
309
485
self.checker = None
310
486
self.checker_initiator_tag = None
311
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
312
489
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
490
self.checker_command = config["checker"]
314
491
self.current_checker_command = None
315
self.last_connect = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
495
self.approvals_pending = 0
496
self.approval_delay = string_to_delta(
497
config["approval_delay"])
498
self.approval_duration = string_to_delta(
499
config["approval_duration"])
500
self.changedstate = (multiprocessing_manager
501
.Condition(multiprocessing_manager
503
self.client_structure = [attr for attr in
504
self.__dict__.iterkeys()
505
if not attr.startswith("_")]
506
self.client_structure.append("client_structure")
508
for name, t in inspect.getmembers(type(self),
512
if not name.startswith("_"):
513
self.client_structure.append(name)
515
# Send notice to process children that client state has changed
516
def send_changedstate(self):
517
with self.changedstate:
518
self.changedstate.notify_all()
317
520
def enable(self):
318
521
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
522
if getattr(self, "enabled", False):
320
523
# Already enabled
525
self.send_changedstate()
526
self.expires = datetime.datetime.utcnow() + self.timeout
322
528
self.last_enabled = datetime.datetime.utcnow()
531
def disable(self, quiet=True):
532
"""Disable this client."""
533
if not getattr(self, "enabled", False):
536
self.send_changedstate()
538
logger.info("Disabling client %s", self.name)
539
if getattr(self, "disable_initiator_tag", False):
540
gobject.source_remove(self.disable_initiator_tag)
541
self.disable_initiator_tag = None
543
if getattr(self, "checker_initiator_tag", False):
544
gobject.source_remove(self.checker_initiator_tag)
545
self.checker_initiator_tag = None
548
# Do not run this again if called by a gobject.timeout_add
554
def init_checker(self):
323
555
# Schedule a new checker to be started an 'interval' from now,
324
556
# and every interval from then on.
325
557
self.checker_initiator_tag = (gobject.timeout_add
326
558
(self.interval_milliseconds(),
327
559
self.start_checker))
328
# Also start a new checker *right now*.
330
560
# Schedule a disable() when 'timeout' has passed
331
561
self.disable_initiator_tag = (gobject.timeout_add
332
562
(self.timeout_milliseconds(),
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
345
gobject.source_remove(self.checker_initiator_tag)
346
self.checker_initiator_tag = None
348
if self.disable_hook:
349
self.disable_hook(self)
351
# Do not run this again if called by a gobject.timeout_add
355
self.disable_hook = None
564
# Also start a new checker *right now*.
358
567
def checker_callback(self, pid, condition, command):
359
568
"""The checker has completed, so take appropriate actions."""
360
569
self.checker_callback_tag = None
361
570
self.checker = None
362
571
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
365
logger.info(u"Checker for %(name)s succeeded",
572
self.last_checker_status = os.WEXITSTATUS(condition)
573
if self.last_checker_status == 0:
574
logger.info("Checker for %(name)s succeeded",
367
576
self.checked_ok()
369
logger.info(u"Checker for %(name)s failed",
578
logger.info("Checker for %(name)s failed",
372
logger.warning(u"Checker for %(name)s crashed?",
581
self.last_checker_status = -1
582
logger.warning("Checker for %(name)s crashed?",
375
def checked_ok(self):
585
def checked_ok(self, timeout=None):
376
586
"""Bump up the timeout for this client.
378
588
This should only be called when the client has been seen,
592
timeout = self.timeout
381
593
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
594
if self.disable_initiator_tag is not None:
595
gobject.source_remove(self.disable_initiator_tag)
596
if getattr(self, "enabled", False):
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
600
self.expires = datetime.datetime.utcnow() + timeout
602
def need_approval(self):
603
self.last_approval_request = datetime.datetime.utcnow()
387
605
def start_checker(self):
388
606
"""Start a new checker subprocess if one is not running.
542
757
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
758
return getattr(obj, "_dbus_is_property", False)
545
760
def _get_all_dbus_properties(self):
546
761
"""Returns a generator of (name, attribute) pairs
548
return ((prop._dbus_name, prop)
763
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
764
for cls in self.__class__.__mro__
549
765
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
766
inspect.getmembers(cls, self._is_dbus_property))
552
768
def _get_dbus_property(self, interface_name, property_name):
553
769
"""Returns a bound method if one exists which is a D-Bus
554
770
property with the specified name and interface.
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
772
for cls in self.__class__.__mro__:
773
for name, value in (inspect.getmembers
774
(cls, self._is_dbus_property)):
775
if (value._dbus_name == property_name
776
and value._dbus_interface == interface_name):
777
return value.__get__(self)
566
779
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
780
raise DBusPropertyNotFound(self.dbus_object_path + ":"
781
+ interface_name + "."
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
784
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
573
786
def Get(self, interface_name, property_name):
574
787
"""Standard D-Bus property Get() method, see D-Bus standard.
576
789
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
790
if prop._dbus_access == "write":
578
791
raise DBusPropertyAccessException(property_name)
580
if not hasattr(value, u"variant_level"):
793
if not hasattr(value, "variant_level"):
582
795
return type(value)(value, variant_level=value.variant_level+1)
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
797
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
585
798
def Set(self, interface_name, property_name, value):
586
799
"""Standard D-Bus property Set() method, see D-Bus standard.
588
801
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
802
if prop._dbus_access == "read":
590
803
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
804
if prop._dbus_get_args_options["byte_arrays"]:
805
# The byte_arrays option is not supported yet on
806
# signatures other than "ay".
807
if prop._dbus_signature != "ay":
592
809
value = dbus.ByteArray(''.join(unichr(byte)
593
810
for byte in value))
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
813
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
814
out_signature="a{sv}")
598
815
def GetAll(self, interface_name):
599
816
"""Standard D-Bus property GetAll() method, see D-Bus
602
819
Note: Will not include properties with access="write".
605
822
for name, prop in self._get_all_dbus_properties():
606
823
if (interface_name
607
824
and interface_name != prop._dbus_interface):
608
825
# Interface non-empty but did not match
610
827
# Ignore write-only properties
611
if prop._dbus_access == u"write":
828
if prop._dbus_access == "write":
614
if not hasattr(value, u"variant_level"):
831
if not hasattr(value, "variant_level"):
832
properties[name] = value
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
834
properties[name] = type(value)(value, variant_level=
835
value.variant_level+1)
836
return dbus.Dictionary(properties, signature="sv")
621
838
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
840
path_keyword='object_path',
624
841
connection_keyword='connection')
625
842
def Introspect(self, object_path, connection):
628
845
xmlstring = dbus.service.Object.Introspect(self, object_path,
630
document = xml.dom.minidom.parseString(xmlstring)
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
848
document = xml.dom.minidom.parseString(xmlstring)
849
def make_tag(document, name, prop):
850
e = document.createElement("property")
851
e.setAttribute("name", name)
852
e.setAttribute("type", prop._dbus_signature)
853
e.setAttribute("access", prop._dbus_access)
855
for if_tag in document.getElementsByTagName("interface"):
856
for tag in (make_tag(document, name, prop)
858
in self._get_all_dbus_properties()
859
if prop._dbus_interface
860
== if_tag.getAttribute("name")):
861
if_tag.appendChild(tag)
862
# Add the names to the return values for the
863
# "org.freedesktop.DBus.Properties" methods
864
if (if_tag.getAttribute("name")
865
== "org.freedesktop.DBus.Properties"):
866
for cn in if_tag.getElementsByTagName("method"):
867
if cn.getAttribute("name") == "Get":
868
for arg in cn.getElementsByTagName("arg"):
869
if (arg.getAttribute("direction")
871
arg.setAttribute("name", "value")
872
elif cn.getAttribute("name") == "GetAll":
873
for arg in cn.getElementsByTagName("arg"):
874
if (arg.getAttribute("direction")
876
arg.setAttribute("name", "props")
877
xmlstring = document.toxml("utf-8")
879
except (AttributeError, xml.dom.DOMException,
880
xml.parsers.expat.ExpatError) as error:
881
logger.error("Failed to override Introspection method",
886
def datetime_to_dbus (dt, variant_level=0):
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
889
return dbus.String("", variant_level = variant_level)
890
return dbus.String(dt.isoformat(),
891
variant_level=variant_level)
894
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
896
"""Applied to an empty subclass of a D-Bus object, this metaclass
897
will add additional D-Bus attributes matching a certain pattern.
899
def __new__(mcs, name, bases, attr):
900
# Go through all the base classes which could have D-Bus
901
# methods, signals, or properties in them
902
for base in (b for b in bases
903
if issubclass(b, dbus.service.Object)):
904
# Go though all attributes of the base class
905
for attrname, attribute in inspect.getmembers(base):
906
# Ignore non-D-Bus attributes, and D-Bus attributes
907
# with the wrong interface name
908
if (not hasattr(attribute, "_dbus_interface")
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
912
# Create an alternate D-Bus interface name based on
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
917
# Is this a D-Bus signal?
918
if getattr(attribute, "_dbus_is_signal", False):
919
# Extract the original non-method function by
921
nonmethod_func = (dict(
922
zip(attribute.func_code.co_freevars,
923
attribute.__closure__))["func"]
925
# Create a new, but exactly alike, function
926
# object, and decorate it to be a new D-Bus signal
927
# with the alternate D-Bus interface name
928
new_function = (dbus.service.signal
930
attribute._dbus_signature)
932
nonmethod_func.func_code,
933
nonmethod_func.func_globals,
934
nonmethod_func.func_name,
935
nonmethod_func.func_defaults,
936
nonmethod_func.func_closure)))
937
# Define a creator of a function to call both the
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
940
def fixscope(func1, func2):
941
"""This function is a scope container to pass
942
func1 and func2 to the "call_both" function
943
outside of its arguments"""
944
def call_both(*args, **kwargs):
945
"""This function will emit two D-Bus
946
signals by calling func1 and func2"""
947
func1(*args, **kwargs)
948
func2(*args, **kwargs)
950
# Create the "call_both" function and add it to
952
attr[attrname] = fixscope(attribute,
954
# Is this a D-Bus method?
955
elif getattr(attribute, "_dbus_is_method", False):
956
# Create a new, but exactly alike, function
957
# object. Decorate it to be a new D-Bus method
958
# with the alternate D-Bus interface name. Add it
960
attr[attrname] = (dbus.service.method
962
attribute._dbus_in_signature,
963
attribute._dbus_out_signature)
965
(attribute.func_code,
966
attribute.func_globals,
968
attribute.func_defaults,
969
attribute.func_closure)))
970
# Is this a D-Bus property?
971
elif getattr(attribute, "_dbus_is_property", False):
972
# Create a new, but exactly alike, function
973
# object, and decorate it to be a new D-Bus
974
# property with the alternate D-Bus interface
975
# name. Add it to the class.
976
attr[attrname] = (dbus_service_property
978
attribute._dbus_signature,
979
attribute._dbus_access,
981
._dbus_get_args_options
984
(attribute.func_code,
985
attribute.func_globals,
987
attribute.func_defaults,
988
attribute.func_closure)))
989
return type.__new__(mcs, name, bases, attr)
665
992
class ClientDBus(Client, DBusObjectWithProperties):
666
993
"""A Client class using D-Bus
669
996
dbus_object_path: dbus.ObjectPath
670
997
bus: dbus.SystemBus()
1000
runtime_expansions = (Client.runtime_expansions
1001
+ ("dbus_object_path",))
672
1003
# dbus.service.Object doesn't use super(), so we can't either.
674
1005
def __init__(self, bus = None, *args, **kwargs):
676
1007
Client.__init__(self, *args, **kwargs)
1009
self._approvals_pending = 0
677
1010
# Only now, when this client is initialized, can it show up on
1012
client_object_name = unicode(self.name).translate(
1013
{ord("."): ord("_"),
1014
ord("-"): ord("_")})
679
1015
self.dbus_object_path = (dbus.ObjectPath
681
+ self.name.replace(u".", u"_")))
1016
("/clients/" + client_object_name))
682
1017
DBusObjectWithProperties.__init__(self, self.bus,
683
1018
self.dbus_object_path)
686
def _datetime_to_dbus(dt, variant_level=0):
687
"""Convert a UTC datetime.datetime() to a D-Bus type."""
688
return dbus.String(dt.isoformat(),
689
variant_level=variant_level)
692
oldstate = getattr(self, u"enabled", False)
693
r = Client.enable(self)
694
if oldstate != self.enabled:
696
self.PropertyChanged(dbus.String(u"enabled"),
697
dbus.Boolean(True, variant_level=1))
698
self.PropertyChanged(
699
dbus.String(u"last_enabled"),
700
self._datetime_to_dbus(self.last_enabled,
704
def disable(self, signal = True):
705
oldstate = getattr(self, u"enabled", False)
706
r = Client.disable(self)
707
if signal and oldstate != self.enabled:
709
self.PropertyChanged(dbus.String(u"enabled"),
710
dbus.Boolean(False, variant_level=1))
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1023
""" Modify a variable so that it's a property which announces
1024
its changes to DBus.
1026
transform_fun: Function that takes a value and a variant_level
1027
and transforms it to a D-Bus type.
1028
dbus_name: D-Bus name of the variable
1029
type_func: Function that transform the value before sending it
1030
to the D-Bus. Default: no transform
1031
variant_level: D-Bus variant level. Default: 1
1033
attrname = "_{0}".format(dbus_name)
1034
def setter(self, value):
1035
if hasattr(self, "dbus_object_path"):
1036
if (not hasattr(self, attrname) or
1037
type_func(getattr(self, attrname, None))
1038
!= type_func(value)):
1039
dbus_value = transform_func(type_func(value),
1042
self.PropertyChanged(dbus.String(dbus_name),
1044
setattr(self, attrname, value)
1046
return property(lambda self: getattr(self, attrname), setter)
1049
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1050
approvals_pending = notifychangeproperty(dbus.Boolean,
1053
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1054
last_enabled = notifychangeproperty(datetime_to_dbus,
1056
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1057
type_func = lambda checker:
1058
checker is not None)
1059
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1061
last_approval_request = notifychangeproperty(
1062
datetime_to_dbus, "LastApprovalRequest")
1063
approved_by_default = notifychangeproperty(dbus.Boolean,
1064
"ApprovedByDefault")
1065
approval_delay = notifychangeproperty(dbus.UInt16,
1068
_timedelta_to_milliseconds)
1069
approval_duration = notifychangeproperty(
1070
dbus.UInt16, "ApprovalDuration",
1071
type_func = _timedelta_to_milliseconds)
1072
host = notifychangeproperty(dbus.String, "Host")
1073
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1075
_timedelta_to_milliseconds)
1076
extended_timeout = notifychangeproperty(
1077
dbus.UInt16, "ExtendedTimeout",
1078
type_func = _timedelta_to_milliseconds)
1079
interval = notifychangeproperty(dbus.UInt16,
1082
_timedelta_to_milliseconds)
1083
checker_command = notifychangeproperty(dbus.String, "Checker")
1085
del notifychangeproperty
713
1087
def __del__(self, *args, **kwargs):
715
1089
self.remove_from_connection()
716
1090
except LookupError:
718
if hasattr(DBusObjectWithProperties, u"__del__"):
1092
if hasattr(DBusObjectWithProperties, "__del__"):
719
1093
DBusObjectWithProperties.__del__(self, *args, **kwargs)
720
1094
Client.__del__(self, *args, **kwargs)
762
1124
and old_checker_pid != self.checker.pid):
763
1125
# Emit D-Bus signal
764
1126
self.CheckerStarted(self.current_checker_command)
765
self.PropertyChanged(
766
dbus.String(u"checker_running"),
767
dbus.Boolean(True, variant_level=1))
770
def stop_checker(self, *args, **kwargs):
771
old_checker = getattr(self, u"checker", None)
772
r = Client.stop_checker(self, *args, **kwargs)
773
if (old_checker is not None
774
and getattr(self, u"checker", None) is None):
775
self.PropertyChanged(dbus.String(u"checker_running"),
776
dbus.Boolean(False, variant_level=1))
779
## D-Bus methods & signals
780
_interface = u"se.bsnet.fukt.Mandos.Client"
783
@dbus.service.method(_interface)
785
return self.checked_ok()
1129
def _reset_approved(self):
1130
self._approved = None
1133
def approve(self, value=True):
1134
self.send_changedstate()
1135
self._approved = value
1136
gobject.timeout_add(_timedelta_to_milliseconds
1137
(self.approval_duration),
1138
self._reset_approved)
1141
## D-Bus methods, signals & properties
1142
_interface = "se.recompile.Mandos.Client"
787
1146
# CheckerCompleted - signal
788
@dbus.service.signal(_interface, signature=u"nxs")
1147
@dbus.service.signal(_interface, signature="nxs")
789
1148
def CheckerCompleted(self, exitcode, waitstatus, command):
793
1152
# CheckerStarted - signal
794
@dbus.service.signal(_interface, signature=u"s")
1153
@dbus.service.signal(_interface, signature="s")
795
1154
def CheckerStarted(self, command):
799
1158
# PropertyChanged - signal
800
@dbus.service.signal(_interface, signature=u"sv")
1159
@dbus.service.signal(_interface, signature="sv")
801
1160
def PropertyChanged(self, property, value):
805
# ReceivedSecret - signal
1164
# GotSecret - signal
806
1165
@dbus.service.signal(_interface)
807
def ReceivedSecret(self):
1166
def GotSecret(self):
1168
Is sent after a successful transfer of secret from the Mandos
1169
server to mandos-client
811
1173
# Rejected - signal
812
@dbus.service.signal(_interface)
1174
@dbus.service.signal(_interface, signature="s")
1175
def Rejected(self, reason):
1179
# NeedApproval - signal
1180
@dbus.service.signal(_interface, signature="tb")
1181
def NeedApproval(self, timeout, default):
1183
return self.need_approval()
1185
# NeRwequest - signal
1186
@dbus.service.signal(_interface, signature="s")
1187
def NewRequest(self, ip):
1189
Is sent after a client request a password.
1196
@dbus.service.method(_interface, in_signature="b")
1197
def Approve(self, value):
1200
# CheckedOK - method
1201
@dbus.service.method(_interface)
1202
def CheckedOK(self):
817
1205
# Enable - method
818
1206
@dbus.service.method(_interface)
837
1225
def StopChecker(self):
838
1226
self.stop_checker()
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def name_dbus_property(self):
1230
# ApprovalPending - property
1231
@dbus_service_property(_interface, signature="b", access="read")
1232
def ApprovalPending_dbus_property(self):
1233
return dbus.Boolean(bool(self.approvals_pending))
1235
# ApprovedByDefault - property
1236
@dbus_service_property(_interface, signature="b",
1238
def ApprovedByDefault_dbus_property(self, value=None):
1239
if value is None: # get
1240
return dbus.Boolean(self.approved_by_default)
1241
self.approved_by_default = bool(value)
1243
# ApprovalDelay - property
1244
@dbus_service_property(_interface, signature="t",
1246
def ApprovalDelay_dbus_property(self, value=None):
1247
if value is None: # get
1248
return dbus.UInt64(self.approval_delay_milliseconds())
1249
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1251
# ApprovalDuration - property
1252
@dbus_service_property(_interface, signature="t",
1254
def ApprovalDuration_dbus_property(self, value=None):
1255
if value is None: # get
1256
return dbus.UInt64(_timedelta_to_milliseconds(
1257
self.approval_duration))
1258
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1261
@dbus_service_property(_interface, signature="s", access="read")
1262
def Name_dbus_property(self):
843
1263
return dbus.String(self.name)
845
# fingerprint - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def fingerprint_dbus_property(self):
1265
# Fingerprint - property
1266
@dbus_service_property(_interface, signature="s", access="read")
1267
def Fingerprint_dbus_property(self):
848
1268
return dbus.String(self.fingerprint)
851
@dbus_service_property(_interface, signature=u"s",
853
def host_dbus_property(self, value=None):
1271
@dbus_service_property(_interface, signature="s",
1273
def Host_dbus_property(self, value=None):
854
1274
if value is None: # get
855
1275
return dbus.String(self.host)
856
1276
self.host = value
858
self.PropertyChanged(dbus.String(u"host"),
859
dbus.String(value, variant_level=1))
862
@dbus_service_property(_interface, signature=u"s", access=u"read")
863
def created_dbus_property(self):
864
return dbus.String(self._datetime_to_dbus(self.created))
866
# last_enabled - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def last_enabled_dbus_property(self):
869
if self.last_enabled is None:
870
return dbus.String(u"")
871
return dbus.String(self._datetime_to_dbus(self.last_enabled))
874
@dbus_service_property(_interface, signature=u"b",
876
def enabled_dbus_property(self, value=None):
1278
# Created - property
1279
@dbus_service_property(_interface, signature="s", access="read")
1280
def Created_dbus_property(self):
1281
return dbus.String(datetime_to_dbus(self.created))
1283
# LastEnabled - property
1284
@dbus_service_property(_interface, signature="s", access="read")
1285
def LastEnabled_dbus_property(self):
1286
return datetime_to_dbus(self.last_enabled)
1288
# Enabled - property
1289
@dbus_service_property(_interface, signature="b",
1291
def Enabled_dbus_property(self, value=None):
877
1292
if value is None: # get
878
1293
return dbus.Boolean(self.enabled)
884
# last_checked_ok - property
885
@dbus_service_property(_interface, signature=u"s",
887
def last_checked_ok_dbus_property(self, value=None):
1299
# LastCheckedOK - property
1300
@dbus_service_property(_interface, signature="s",
1302
def LastCheckedOK_dbus_property(self, value=None):
888
1303
if value is not None:
889
1304
self.checked_ok()
891
if self.last_checked_ok is None:
892
return dbus.String(u"")
893
return dbus.String(self._datetime_to_dbus(self
897
@dbus_service_property(_interface, signature=u"t",
899
def timeout_dbus_property(self, value=None):
1306
return datetime_to_dbus(self.last_checked_ok)
1308
# Expires - property
1309
@dbus_service_property(_interface, signature="s", access="read")
1310
def Expires_dbus_property(self):
1311
return datetime_to_dbus(self.expires)
1313
# LastApprovalRequest - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def LastApprovalRequest_dbus_property(self):
1316
return datetime_to_dbus(self.last_approval_request)
1318
# Timeout - property
1319
@dbus_service_property(_interface, signature="t",
1321
def Timeout_dbus_property(self, value=None):
900
1322
if value is None: # get
901
1323
return dbus.UInt64(self.timeout_milliseconds())
902
1324
self.timeout = datetime.timedelta(0, 0, 0, value)
904
self.PropertyChanged(dbus.String(u"timeout"),
905
dbus.UInt64(value, variant_level=1))
906
if getattr(self, u"disable_initiator_tag", None) is None:
1325
if getattr(self, "disable_initiator_tag", None) is None:
908
1327
# Reschedule timeout
909
1328
gobject.source_remove(self.disable_initiator_tag)
910
1329
self.disable_initiator_tag = None
912
_timedelta_to_milliseconds((self
1331
time_to_die = _timedelta_to_milliseconds((self
917
1336
if time_to_die <= 0:
918
1337
# The timeout has passed
1340
self.expires = (datetime.datetime.utcnow()
1341
+ datetime.timedelta(milliseconds =
921
1343
self.disable_initiator_tag = (gobject.timeout_add
922
1344
(time_to_die, self.disable))
924
# interval - property
925
@dbus_service_property(_interface, signature=u"t",
927
def interval_dbus_property(self, value=None):
1346
# ExtendedTimeout - property
1347
@dbus_service_property(_interface, signature="t",
1349
def ExtendedTimeout_dbus_property(self, value=None):
1350
if value is None: # get
1351
return dbus.UInt64(self.extended_timeout_milliseconds())
1352
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1354
# Interval - property
1355
@dbus_service_property(_interface, signature="t",
1357
def Interval_dbus_property(self, value=None):
928
1358
if value is None: # get
929
1359
return dbus.UInt64(self.interval_milliseconds())
930
1360
self.interval = datetime.timedelta(0, 0, 0, value)
932
self.PropertyChanged(dbus.String(u"interval"),
933
dbus.UInt64(value, variant_level=1))
934
if getattr(self, u"checker_initiator_tag", None) is None:
1361
if getattr(self, "checker_initiator_tag", None) is None:
936
1363
# Reschedule checker run
937
1364
gobject.source_remove(self.checker_initiator_tag)
938
1365
self.checker_initiator_tag = (gobject.timeout_add
939
1366
(value, self.start_checker))
940
1367
self.start_checker() # Start one now, too
943
@dbus_service_property(_interface, signature=u"s",
945
def checker_dbus_property(self, value=None):
1369
# Checker - property
1370
@dbus_service_property(_interface, signature="s",
1372
def Checker_dbus_property(self, value=None):
946
1373
if value is None: # get
947
1374
return dbus.String(self.checker_command)
948
1375
self.checker_command = value
950
self.PropertyChanged(dbus.String(u"checker"),
951
dbus.String(self.checker_command,
954
# checker_running - property
955
@dbus_service_property(_interface, signature=u"b",
957
def checker_running_dbus_property(self, value=None):
1377
# CheckerRunning - property
1378
@dbus_service_property(_interface, signature="b",
1380
def CheckerRunning_dbus_property(self, value=None):
958
1381
if value is None: # get
959
1382
return dbus.Boolean(self.checker is not None)
983
1436
Note: This will run in its own forked process."""
985
1438
def handle(self):
986
logger.info(u"TCP connection from: %s",
987
unicode(self.client_address))
988
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
989
# Open IPC pipe to parent process
990
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
1440
logger.info("TCP connection from: %s",
1441
unicode(self.client_address))
1442
logger.debug("Pipe FD: %d",
1443
self.server.child_pipe.fileno())
991
1445
session = (gnutls.connection
992
1446
.ClientSession(self.request,
993
1447
gnutls.connection
994
1448
.X509Credentials()))
996
line = self.request.makefile().readline()
997
logger.debug(u"Protocol version: %r", line)
999
if int(line.strip().split()[0]) > 1:
1001
except (ValueError, IndexError, RuntimeError), error:
1002
logger.error(u"Unknown protocol version: %s", error)
1005
1450
# Note: gnutls.connection.X509Credentials is really a
1006
1451
# generic GnuTLS certificate credentials object so long as
1007
1452
# no X.509 keys are added to it. Therefore, we can use it
1008
1453
# here despite using OpenPGP certificates.
1010
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1011
# u"+AES-256-CBC", u"+SHA1",
1012
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1455
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1456
# "+AES-256-CBC", "+SHA1",
1457
# "+COMP-NULL", "+CTYPE-OPENPGP",
1014
1459
# Use a fallback default, since this MUST be set.
1015
1460
priority = self.server.gnutls_priority
1016
1461
if priority is None:
1017
priority = u"NORMAL"
1018
1463
(gnutls.library.functions
1019
1464
.gnutls_priority_set_direct(session._c_object,
1020
1465
priority, None))
1467
# Start communication using the Mandos protocol
1468
# Get protocol number
1469
line = self.request.makefile().readline()
1470
logger.debug("Protocol version: %r", line)
1472
if int(line.strip().split()[0]) > 1:
1474
except (ValueError, IndexError, RuntimeError) as error:
1475
logger.error("Unknown protocol version: %s", error)
1478
# Start GnuTLS connection
1023
1480
session.handshake()
1024
except gnutls.errors.GNUTLSError, error:
1025
logger.warning(u"Handshake failed: %s", error)
1481
except gnutls.errors.GNUTLSError as error:
1482
logger.warning("Handshake failed: %s", error)
1026
1483
# Do not run session.bye() here: the session is not
1027
1484
# established. Just abandon the request.
1029
logger.debug(u"Handshake succeeded")
1486
logger.debug("Handshake succeeded")
1488
approval_required = False
1031
fpr = self.fingerprint(self.peer_certificate(session))
1032
except (TypeError, gnutls.errors.GNUTLSError), error:
1033
logger.warning(u"Bad certificate: %s", error)
1036
logger.debug(u"Fingerprint: %s", fpr)
1491
fpr = self.fingerprint(self.peer_certificate
1494
gnutls.errors.GNUTLSError) as error:
1495
logger.warning("Bad certificate: %s", error)
1497
logger.debug("Fingerprint: %s", fpr)
1498
if self.server.use_dbus:
1500
client.NewRequest(str(self.client_address))
1503
client = ProxyClient(child_pipe, fpr,
1504
self.client_address)
1508
if client.approval_delay:
1509
delay = client.approval_delay
1510
client.approvals_pending += 1
1511
approval_required = True
1514
if not client.enabled:
1515
logger.info("Client %s is disabled",
1517
if self.server.use_dbus:
1519
client.Rejected("Disabled")
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
1525
elif client._approved is None:
1526
logger.info("Client %s needs approval",
1528
if self.server.use_dbus:
1530
client.NeedApproval(
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
1534
logger.warning("Client %s was not approved",
1536
if self.server.use_dbus:
1538
client.Rejected("Denied")
1541
#wait until timeout or approved
1542
time = datetime.datetime.now()
1543
client.changedstate.acquire()
1544
(client.changedstate.wait
1545
(float(client._timedelta_to_milliseconds(delay)
1547
client.changedstate.release()
1548
time2 = datetime.datetime.now()
1549
if (time2 - time) >= delay:
1550
if not client.approved_by_default:
1551
logger.warning("Client %s timed out while"
1552
" waiting for approval",
1554
if self.server.use_dbus:
1556
client.Rejected("Approval timed out")
1561
delay -= time2 - time
1564
while sent_size < len(client.secret):
1566
sent = session.send(client.secret[sent_size:])
1567
except gnutls.errors.GNUTLSError as error:
1568
logger.warning("gnutls send failed")
1570
logger.debug("Sent: %d, remaining: %d",
1571
sent, len(client.secret)
1572
- (sent_size + sent))
1575
logger.info("Sending secret to %s", client.name)
1576
# bump the timeout using extended_timeout
1577
client.checked_ok(client.extended_timeout)
1578
if self.server.use_dbus:
1038
for c in self.server.clients:
1039
if c.fingerprint == fpr:
1043
ipc.write(u"NOTFOUND %s %s\n"
1044
% (fpr, unicode(self.client_address)))
1047
# Have to check if client.still_valid(), since it is
1048
# possible that the client timed out while establishing
1049
# the GnuTLS session.
1050
if not client.still_valid():
1051
ipc.write(u"INVALID %s\n" % client.name)
1054
ipc.write(u"SENDING %s\n" % client.name)
1056
while sent_size < len(client.secret):
1057
sent = session.send(client.secret[sent_size:])
1058
logger.debug(u"Sent: %d, remaining: %d",
1059
sent, len(client.secret)
1060
- (sent_size + sent))
1583
if approval_required:
1584
client.approvals_pending -= 1
1587
except gnutls.errors.GNUTLSError as error:
1588
logger.warning("GnuTLS bye failed")
1065
1591
def peer_certificate(session):
1252
1806
for cond, name in
1253
1807
condition_names.iteritems()
1254
1808
if cond & condition)
1255
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1258
# Turn the pipe file descriptor into a Python file object
1259
if source not in file_objects:
1260
file_objects[source] = os.fdopen(source, u"r", 1)
1262
# Read a line from the file object
1263
cmdline = file_objects[source].readline()
1264
if not cmdline: # Empty line means end of file
1265
# close the IPC pipe
1266
file_objects[source].close()
1267
del file_objects[source]
1269
# Stop calling this function
1272
logger.debug(u"IPC command: %r", cmdline)
1274
# Parse and act on command
1275
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1277
if cmd == u"NOTFOUND":
1278
logger.warning(u"Client not found for fingerprint: %s",
1282
mandos_dbus_service.ClientNotFound(args)
1283
elif cmd == u"INVALID":
1284
for client in self.clients:
1285
if client.name == args:
1286
logger.warning(u"Client %s is invalid", args)
1292
logger.error(u"Unknown client %s is invalid", args)
1293
elif cmd == u"SENDING":
1294
for client in self.clients:
1295
if client.name == args:
1296
logger.info(u"Sending secret to %s", client.name)
1300
client.ReceivedSecret()
1303
logger.error(u"Sending secret to unknown client %s",
1306
logger.error(u"Unknown IPC command: %r", cmdline)
1308
# Keep calling this function
1809
# error, or the other end of multiprocessing.Pipe has closed
1810
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1811
# Wait for other process to exit
1815
# Read a request from the child
1816
request = parent_pipe.recv()
1817
command = request[0]
1819
if command == 'init':
1821
address = request[2]
1823
for c in self.clients.itervalues():
1824
if c.fingerprint == fpr:
1828
logger.info("Client not found for fingerprint: %s, ad"
1829
"dress: %s", fpr, address)
1832
mandos_dbus_service.ClientNotFound(fpr,
1834
parent_pipe.send(False)
1837
gobject.io_add_watch(parent_pipe.fileno(),
1838
gobject.IO_IN | gobject.IO_HUP,
1839
functools.partial(self.handle_ipc,
1845
parent_pipe.send(True)
1846
# remove the old hook in favor of the new above hook on
1849
if command == 'funcall':
1850
funcname = request[1]
1854
parent_pipe.send(('data', getattr(client_object,
1858
if command == 'getattr':
1859
attrname = request[1]
1860
if callable(client_object.__getattribute__(attrname)):
1861
parent_pipe.send(('function',))
1863
parent_pipe.send(('data', client_object
1864
.__getattribute__(attrname)))
1866
if command == 'setattr':
1867
attrname = request[1]
1869
setattr(client_object, attrname, value)
1312
1874
def string_to_delta(interval):
1313
1875
"""Parse a string and return a datetime.timedelta
1315
>>> string_to_delta(u'7d')
1877
>>> string_to_delta('7d')
1316
1878
datetime.timedelta(7)
1317
>>> string_to_delta(u'60s')
1879
>>> string_to_delta('60s')
1318
1880
datetime.timedelta(0, 60)
1319
>>> string_to_delta(u'60m')
1881
>>> string_to_delta('60m')
1320
1882
datetime.timedelta(0, 3600)
1321
>>> string_to_delta(u'24h')
1883
>>> string_to_delta('24h')
1322
1884
datetime.timedelta(1)
1323
>>> string_to_delta(u'1w')
1885
>>> string_to_delta('1w')
1324
1886
datetime.timedelta(7)
1325
>>> string_to_delta(u'5m 30s')
1887
>>> string_to_delta('5m 30s')
1326
1888
datetime.timedelta(0, 330)
1328
1890
timevalue = datetime.timedelta(0)
1401
1940
##################################################################
1402
1941
# Parsing of options, both command line and config file
1404
parser = optparse.OptionParser(version = "%%prog %s" % version)
1405
parser.add_option("-i", u"--interface", type=u"string",
1406
metavar="IF", help=u"Bind to interface IF")
1407
parser.add_option("-a", u"--address", type=u"string",
1408
help=u"Address to listen for requests on")
1409
parser.add_option("-p", u"--port", type=u"int",
1410
help=u"Port number to receive requests on")
1411
parser.add_option("--check", action=u"store_true",
1412
help=u"Run self-test")
1413
parser.add_option("--debug", action=u"store_true",
1414
help=u"Debug mode; run in foreground and log to"
1416
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1417
u" priority string (see GnuTLS documentation)")
1418
parser.add_option("--servicename", type=u"string",
1419
metavar=u"NAME", help=u"Zeroconf service name")
1420
parser.add_option("--configdir", type=u"string",
1421
default=u"/etc/mandos", metavar=u"DIR",
1422
help=u"Directory to search for configuration"
1424
parser.add_option("--no-dbus", action=u"store_false",
1425
dest=u"use_dbus", help=u"Do not provide D-Bus"
1426
u" system bus interface")
1427
parser.add_option("--no-ipv6", action=u"store_false",
1428
dest=u"use_ipv6", help=u"Do not use IPv6")
1429
options = parser.parse_args()[0]
1943
parser = argparse.ArgumentParser()
1944
parser.add_argument("-v", "--version", action="version",
1945
version = "%%(prog)s %s" % version,
1946
help="show version number and exit")
1947
parser.add_argument("-i", "--interface", metavar="IF",
1948
help="Bind to interface IF")
1949
parser.add_argument("-a", "--address",
1950
help="Address to listen for requests on")
1951
parser.add_argument("-p", "--port", type=int,
1952
help="Port number to receive requests on")
1953
parser.add_argument("--check", action="store_true",
1954
help="Run self-test")
1955
parser.add_argument("--debug", action="store_true",
1956
help="Debug mode; run in foreground and log"
1958
parser.add_argument("--debuglevel", metavar="LEVEL",
1959
help="Debug level for stdout output")
1960
parser.add_argument("--priority", help="GnuTLS"
1961
" priority string (see GnuTLS documentation)")
1962
parser.add_argument("--servicename",
1963
metavar="NAME", help="Zeroconf service name")
1964
parser.add_argument("--configdir",
1965
default="/etc/mandos", metavar="DIR",
1966
help="Directory to search for configuration"
1968
parser.add_argument("--no-dbus", action="store_false",
1969
dest="use_dbus", help="Do not provide D-Bus"
1970
" system bus interface")
1971
parser.add_argument("--no-ipv6", action="store_false",
1972
dest="use_ipv6", help="Do not use IPv6")
1973
parser.add_argument("--no-restore", action="store_false",
1974
dest="restore", help="Do not restore stored"
1975
" state", default=True)
1977
options = parser.parse_args()
1431
1979
if options.check:
1479
2028
##################################################################
1481
2030
# For convenience
1482
debug = server_settings[u"debug"]
1483
use_dbus = server_settings[u"use_dbus"]
1484
use_ipv6 = server_settings[u"use_ipv6"]
1487
syslogger.setLevel(logging.WARNING)
1488
console.setLevel(logging.WARNING)
1490
if server_settings[u"servicename"] != u"Mandos":
2031
debug = server_settings["debug"]
2032
debuglevel = server_settings["debuglevel"]
2033
use_dbus = server_settings["use_dbus"]
2034
use_ipv6 = server_settings["use_ipv6"]
2037
initlogger(logging.DEBUG)
2042
level = getattr(logging, debuglevel.upper())
2045
if server_settings["servicename"] != "Mandos":
1491
2046
syslogger.setFormatter(logging.Formatter
1492
(u'Mandos (%s) [%%(process)d]:'
1493
u' %%(levelname)s: %%(message)s'
1494
% server_settings[u"servicename"]))
2047
('Mandos (%s) [%%(process)d]:'
2048
' %%(levelname)s: %%(message)s'
2049
% server_settings["servicename"]))
1496
2051
# Parse config file with clients
1497
client_defaults = { u"timeout": u"1h",
1499
u"checker": u"fping -q -- %%(host)s",
2052
client_defaults = { "timeout": "5m",
2053
"extended_timeout": "15m",
2055
"checker": "fping -q -- %%(host)s",
2057
"approval_delay": "0s",
2058
"approval_duration": "1s",
1502
2060
client_config = configparser.SafeConfigParser(client_defaults)
1503
client_config.read(os.path.join(server_settings[u"configdir"],
2061
client_config.read(os.path.join(server_settings["configdir"],
1506
2064
global mandos_dbus_service
1507
2065
mandos_dbus_service = None
1509
tcp_server = MandosServer((server_settings[u"address"],
1510
server_settings[u"port"]),
2067
tcp_server = MandosServer((server_settings["address"],
2068
server_settings["port"]),
1512
interface=server_settings[u"interface"],
2070
interface=(server_settings["interface"]
1513
2072
use_ipv6=use_ipv6,
1514
2073
gnutls_priority=
1515
server_settings[u"priority"],
2074
server_settings["priority"],
1516
2075
use_dbus=use_dbus)
1517
pidfilename = u"/var/run/mandos.pid"
1519
pidfile = open(pidfilename, u"w")
1521
logger.error(u"Could not open file %r", pidfilename)
2077
pidfilename = "/var/run/mandos.pid"
2079
pidfile = open(pidfilename, "w")
2081
logger.error("Could not open file %r", pidfilename)
1524
uid = pwd.getpwnam(u"_mandos").pw_uid
1525
gid = pwd.getpwnam(u"_mandos").pw_gid
2084
uid = pwd.getpwnam("_mandos").pw_uid
2085
gid = pwd.getpwnam("_mandos").pw_gid
1526
2086
except KeyError:
1528
uid = pwd.getpwnam(u"mandos").pw_uid
1529
gid = pwd.getpwnam(u"mandos").pw_gid
2088
uid = pwd.getpwnam("mandos").pw_uid
2089
gid = pwd.getpwnam("mandos").pw_gid
1530
2090
except KeyError:
1532
uid = pwd.getpwnam(u"nobody").pw_uid
1533
gid = pwd.getpwnam(u"nobody").pw_gid
2092
uid = pwd.getpwnam("nobody").pw_uid
2093
gid = pwd.getpwnam("nobody").pw_gid
1534
2094
except KeyError:
1540
except OSError, error:
2100
except OSError as error:
1541
2101
if error[0] != errno.EPERM:
1544
# Enable all possible GnuTLS debugging
2105
# Enable all possible GnuTLS debugging
1546
2107
# "Use a log level over 10 to enable all debugging options."
1547
2108
# - GnuTLS manual
1548
2109
gnutls.library.functions.gnutls_global_set_log_level(11)
1550
2111
@gnutls.library.types.gnutls_log_func
1551
2112
def debug_gnutls(level, string):
1552
logger.debug(u"GnuTLS: %s", string[:-1])
2113
logger.debug("GnuTLS: %s", string[:-1])
1554
2115
(gnutls.library.functions
1555
2116
.gnutls_global_set_log_function(debug_gnutls))
2118
# Redirect stdin so all checkers get /dev/null
2119
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2120
os.dup2(null, sys.stdin.fileno())
2124
# No console logging
2125
logger.removeHandler(console)
2127
# Need to fork before connecting to D-Bus
2129
# Close all input and output, do double fork, etc.
1557
2132
global main_loop
1558
2133
# From the Avahi example code
1561
2136
bus = dbus.SystemBus()
1562
2137
# End of Avahi example code
1564
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2140
bus_name = dbus.service.BusName("se.recompile.Mandos",
2141
bus, do_not_queue=True)
2142
old_bus_name = (dbus.service.BusName
2143
("se.bsnet.fukt.Mandos", bus,
2145
except dbus.exceptions.NameExistsException as e:
2146
logger.error(unicode(e) + ", disabling D-Bus")
2148
server_settings["use_dbus"] = False
2149
tcp_server.use_dbus = False
1565
2150
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1566
service = AvahiService(name = server_settings[u"servicename"],
1567
servicetype = u"_mandos._tcp",
1568
protocol = protocol, bus = bus)
2151
service = AvahiServiceToSyslog(name =
2152
server_settings["servicename"],
2153
servicetype = "_mandos._tcp",
2154
protocol = protocol, bus = bus)
1569
2155
if server_settings["interface"]:
1570
2156
service.interface = (if_nametoindex
1571
(str(server_settings[u"interface"])))
2157
(str(server_settings["interface"])))
2159
global multiprocessing_manager
2160
multiprocessing_manager = multiprocessing.Manager()
1573
2162
client_class = Client
1575
client_class = functools.partial(ClientDBus, bus = bus)
1576
tcp_server.clients.update(set(
1577
client_class(name = section,
1578
config= dict(client_config.items(section)))
1579
for section in client_config.sections()))
2164
client_class = functools.partial(ClientDBusTransitional,
2167
special_settings = {
2168
# Some settings need to be accessd by special methods;
2169
# booleans need .getboolean(), etc. Here is a list of them:
2170
"approved_by_default":
2172
client_config.getboolean(section, "approved_by_default"),
2174
# Construct a new dict of client settings of this form:
2175
# { client_name: {setting_name: value, ...}, ...}
2176
# with exceptions for any special settings as defined above
2177
client_settings = dict((clientname,
2180
if setting not in special_settings
2181
else special_settings[setting]
2183
for setting, value in
2184
client_config.items(clientname)))
2185
for clientname in client_config.sections())
2187
old_client_settings = {}
2190
# Get client data and settings from last running state.
2191
if server_settings["restore"]:
2193
with open(stored_state_path, "rb") as stored_state:
2194
clients_data, old_client_settings = (pickle.load
2196
os.remove(stored_state_path)
2197
except IOError as e:
2198
logger.warning("Could not load persistent state: {0}"
2200
if e.errno != errno.ENOENT:
2203
with Crypto() as crypt:
2204
for client in clients_data:
2205
client_name = client["name"]
2207
# Decide which value to use after restoring saved state.
2208
# We have three different values: Old config file,
2209
# new config file, and saved state.
2210
# New config value takes precedence if it differs from old
2211
# config value, otherwise use saved state.
2212
for name, value in client_settings[client_name].items():
2214
# For each value in new config, check if it
2215
# differs from the old config value (Except for
2216
# the "secret" attribute)
2217
if (name != "secret" and
2218
value != old_client_settings[client_name]
2220
setattr(client, name, value)
2224
# Clients who has passed its expire date can still be
2225
# enabled if its last checker was sucessful. Clients
2226
# whose checker failed before we stored its state is
2227
# assumed to have failed all checkers during downtime.
2228
if client["enabled"] and client["last_checked_ok"]:
2229
if ((datetime.datetime.utcnow()
2230
- client["last_checked_ok"])
2231
> client["interval"]):
2232
if client["last_checker_status"] != 0:
2233
client["enabled"] = False
2235
client["expires"] = (datetime.datetime
2237
+ client["timeout"])
2239
client["changedstate"] = (multiprocessing_manager
2241
(multiprocessing_manager
2244
new_client = (ClientDBusTransitional.__new__
2245
(ClientDBusTransitional))
2246
tcp_server.clients[client_name] = new_client
2247
new_client.bus = bus
2248
for name, value in client.iteritems():
2249
setattr(new_client, name, value)
2250
client_object_name = unicode(client_name).translate(
2251
{ord("."): ord("_"),
2252
ord("-"): ord("_")})
2253
new_client.dbus_object_path = (dbus.ObjectPath
2255
+ client_object_name))
2256
DBusObjectWithProperties.__init__(new_client,
2261
tcp_server.clients[client_name] = (Client.__new__
2263
for name, value in client.iteritems():
2264
setattr(tcp_server.clients[client_name],
2268
tcp_server.clients[client_name].secret = (
2269
crypt.decrypt(tcp_server.clients[client_name]
2271
client_settings[client_name]
2274
# If decryption fails, we use secret from new settings
2275
tcp_server.clients[client_name].secret = (
2276
client_settings[client_name]["secret"])
2278
# Create/remove clients based on new changes made to config
2279
for clientname in set(old_client_settings) - set(client_settings):
2280
del tcp_server.clients[clientname]
2281
for clientname in set(client_settings) - set(old_client_settings):
2282
tcp_server.clients[clientname] = (client_class(name
1580
2288
if not tcp_server.clients:
1581
logger.warning(u"No clients defined")
1584
# Redirect stdin so all checkers get /dev/null
1585
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1586
os.dup2(null, sys.stdin.fileno())
1590
# No console logging
1591
logger.removeHandler(console)
1592
# Close all input and output, do double fork, etc.
1596
with closing(pidfile):
1598
pidfile.write(str(pid) + "\n")
1601
logger.error(u"Could not write to file %r with PID %d",
1604
# "pidfile" was never created
1609
"Cleanup function; run on exit"
2289
logger.warning("No clients defined")
1612
while tcp_server.clients:
1613
client = tcp_server.clients.pop()
1614
client.disable_hook = None
1617
atexit.register(cleanup)
2295
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
logger.error("Could not write to file %r with PID %d",
2301
# "pidfile" was never created
1620
2305
signal.signal(signal.SIGINT, signal.SIG_IGN)
1621
2307
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1622
2308
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1625
2311
class MandosDBusService(dbus.service.Object):
1626
2312
"""A D-Bus proxy object"""
1627
2313
def __init__(self):
1628
dbus.service.Object.__init__(self, bus, u"/")
1629
_interface = u"se.bsnet.fukt.Mandos"
1631
@dbus.service.signal(_interface, signature=u"oa{sv}")
1632
def ClientAdded(self, objpath, properties):
1636
@dbus.service.signal(_interface, signature=u"s")
1637
def ClientNotFound(self, fingerprint):
1641
@dbus.service.signal(_interface, signature=u"os")
2314
dbus.service.Object.__init__(self, bus, "/")
2315
_interface = "se.recompile.Mandos"
2317
@dbus.service.signal(_interface, signature="o")
2318
def ClientAdded(self, objpath):
2322
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
2327
@dbus.service.signal(_interface, signature="os")
1642
2328
def ClientRemoved(self, objpath, name):
1646
@dbus.service.method(_interface, out_signature=u"ao")
2332
@dbus.service.method(_interface, out_signature="ao")
1647
2333
def GetAllClients(self):
1649
2335
return dbus.Array(c.dbus_object_path
1650
for c in tcp_server.clients)
2337
tcp_server.clients.itervalues())
1652
2339
@dbus.service.method(_interface,
1653
out_signature=u"a{oa{sv}}")
2340
out_signature="a{oa{sv}}")
1654
2341
def GetAllClientsWithProperties(self):
1656
2343
return dbus.Dictionary(
1657
((c.dbus_object_path, c.GetAll(u""))
1658
for c in tcp_server.clients),
1659
signature=u"oa{sv}")
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
1661
@dbus.service.method(_interface, in_signature=u"o")
2348
@dbus.service.method(_interface, in_signature="o")
1662
2349
def RemoveClient(self, object_path):
1664
for c in tcp_server.clients:
2351
for c in tcp_server.clients.itervalues():
1665
2352
if c.dbus_object_path == object_path:
1666
tcp_server.clients.remove(c)
2353
del tcp_server.clients[c.name]
1667
2354
c.remove_from_connection()
1668
2355
# Don't signal anything except ClientRemoved
1669
c.disable(signal=False)
2356
c.disable(quiet=True)
1670
2357
# Emit D-Bus signal
1671
2358
self.ClientRemoved(object_path, c.name)
2360
raise KeyError(object_path)
1677
mandos_dbus_service = MandosDBusService()
1679
for client in tcp_server.clients:
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
2369
"Cleanup function; run on exit"
2372
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2380
with Crypto() as crypt:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = crypt.encrypt(client.secret,
2387
# A list of attributes that will not be stored when
2389
exclude = set(("bus", "changedstate", "secret"))
2390
for name, typ in (inspect.getmembers
2391
(dbus.service.Object)):
2394
client_dict["encrypted_secret"] = (client
2396
for attr in client.client_structure:
2397
if attr not in exclude:
2398
client_dict[attr] = getattr(client, attr)
2400
clients.append(client_dict)
2401
del client_settings[client.name]["secret"]
2404
with os.fdopen(os.open(stored_state_path,
2405
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2406
0600), "wb") as stored_state:
2407
pickle.dump((clients, client_settings), stored_state)
2408
except (IOError, OSError) as e:
2409
logger.warning("Could not save persistent state: {0}"
2411
if e.errno not in (errno.ENOENT, errno.EACCES):
2414
# Delete all clients, and settings from config
2415
while tcp_server.clients:
2416
name, client = tcp_server.clients.popitem()
2418
client.remove_from_connection()
2419
# Don't signal anything except ClientRemoved
2420
client.disable(quiet=True)
2423
mandos_dbus_service.ClientRemoved(client
2426
client_settings.clear()
2428
atexit.register(cleanup)
2430
for client in tcp_server.clients.itervalues():
1681
2432
# Emit D-Bus signal
1682
mandos_dbus_service.ClientAdded(client.dbus_object_path,
2433
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2434
# Need to initiate checking of clients
2436
client.init_checker()
1686
2438
tcp_server.enable()
1687
2439
tcp_server.server_activate()