85
78
except ImportError:
86
79
SO_BINDTODEVICE = None
89
stored_state_file = "clients.pickle"
91
logger = logging.getLogger()
84
logger = logging.Logger(u'mandos')
92
85
syslogger = (logging.handlers.SysLogHandler
93
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
108
interface_index = struct.unpack(str("I"),
110
return interface_index
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
119
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 PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
151
def __exit__ (self, exc_type, exc_value, traceback):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
163
for filename in files:
164
os.remove(os.path.join(root, filename))
166
os.rmdir(os.path.join(root, dirname))
168
os.rmdir(self.tempdir)
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
190
self.gnupg.passphrase = None
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
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)
212
99
class AvahiError(Exception):
213
100
def __init__(self, value, *args, **kwargs):
311
191
self.group.Commit()
312
192
def entry_group_state_changed(self, state, error):
313
193
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
194
logger.debug(u"Avahi state change: %i", state)
316
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
197
logger.debug(u"Zeroconf service established.")
318
198
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
199
logger.warning(u"Zeroconf service name collision.")
321
201
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
202
logger.critical(u"Avahi: Error in group state changed %s",
324
raise AvahiGroupError("State changed: %s"
204
raise AvahiGroupError(u"State changed: %s"
325
205
% unicode(error))
326
206
def cleanup(self):
327
207
"""Derived from the Avahi example code"""
328
208
if self.group is not None:
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
334
210
self.group = None
336
def server_state_changed(self, state, error=None):
211
def server_state_changed(self, state):
337
212
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
349
logger.error(bad_states[state])
351
logger.error(bad_states[state] + ": %r", error)
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
353
216
elif state == avahi.SERVER_RUNNING:
357
logger.debug("Unknown state: %r", state)
359
logger.debug("Unknown state: %r: %r", state, error)
360
218
def activate(self):
361
219
"""Derived from the Avahi example code"""
362
220
if self.server is None:
363
221
self.server = dbus.Interface(
364
222
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
223
avahi.DBUS_PATH_SERVER),
367
224
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
225
self.server.connect_to_signal(u"StateChanged",
369
226
self.server_state_changed)
370
227
self.server_state_changed(self.server.GetState())
372
class AvahiServiceToSyslog(AvahiService):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
388
230
class Client(object):
389
231
"""A representation of a client host served by this server.
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
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)
395
248
checker: subprocess.Popen(); a running checker process used
396
249
to see if the client lives.
397
250
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
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
401
256
runtime with vars(self) as dict, so that for
402
257
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
258
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
438
"checker": "fping -q -- %%(host)s",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
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))
446
268
def timeout_milliseconds(self):
447
269
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
270
return self._timedelta_to_milliseconds(self.timeout)
454
272
def interval_milliseconds(self):
455
273
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
274
return self._timedelta_to_milliseconds(self.interval)
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
481
client["fingerprint"] = (section["fingerprint"].upper()
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
489
client["secret"] = secfile.read()
491
raise TypeError("No secret or secfile for section %s"
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
509
def __init__(self, settings, name = None):
276
def __init__(self, name = None, disable_hook=None, config=None):
510
277
"""Note: the 'checker' key in 'config' sets the
511
278
'checker_command' attribute and *not* the 'checker'
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
525
self.last_enabled = None
528
logger.debug("Creating client %r", self.name)
283
logger.debug(u"Creating client %r", self.name)
529
284
# Uppercase and remove spaces from fingerprint for later
530
285
# comparison purposes with return value from the fingerprint()
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
536
# attributes specific for this server instance
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"])),
297
self.secret = secfile.read()
299
raise TypeError(u"No secret or secfile for client %s"
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
304
self.last_enabled = None
305
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
537
309
self.checker = None
538
310
self.checker_initiator_tag = None
539
311
self.disable_initiator_tag = None
540
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
541
314
self.current_checker_command = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
552
for name, t in inspect.getmembers(type(self),
556
if not name.startswith("_"):
557
self.client_structure.append(name)
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
315
self.last_connect = None
564
317
def enable(self):
565
318
"""Start this client's checker and timeout hooks"""
566
if getattr(self, "enabled", False):
319
if getattr(self, u"enabled", False):
567
320
# Already enabled
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
572
322
self.last_enabled = datetime.datetime.utcnow()
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
580
self.send_changedstate()
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
592
# Do not run this again if called by a gobject.timeout_add
598
def init_checker(self):
599
323
# Schedule a new checker to be started an 'interval' from now,
600
324
# and every interval from then on.
601
325
self.checker_initiator_tag = (gobject.timeout_add
602
326
(self.interval_milliseconds(),
603
327
self.start_checker))
328
# Also start a new checker *right now*.
604
330
# Schedule a disable() when 'timeout' has passed
605
331
self.disable_initiator_tag = (gobject.timeout_add
606
332
(self.timeout_milliseconds(),
608
# Also start a new checker *right now*.
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
611
358
def checker_callback(self, pid, condition, command):
612
359
"""The checker has completed, so take appropriate actions."""
613
360
self.checker_callback_tag = None
614
361
self.checker = None
615
362
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
363
exitstatus = os.WEXITSTATUS(condition)
365
logger.info(u"Checker for %(name)s succeeded",
620
367
self.checked_ok()
622
logger.info("Checker for %(name)s failed",
369
logger.info(u"Checker for %(name)s failed",
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
372
logger.warning(u"Checker for %(name)s crashed?",
629
def checked_ok(self, timeout=None):
375
def checked_ok(self):
630
376
"""Bump up the timeout for this client.
632
378
This should only be called when the client has been seen,
636
timeout = self.timeout
637
381
self.last_checked_ok = datetime.datetime.utcnow()
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
649
387
def start_checker(self):
650
388
"""Start a new checker subprocess if one is not running.
801
542
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
543
return getattr(obj, u"_dbus_is_property", False)
804
545
def _get_all_dbus_properties(self):
805
546
"""Returns a generator of (name, attribute) pairs
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
548
return ((prop._dbus_name, prop)
809
549
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
550
inspect.getmembers(self, self._is_dbus_property))
812
552
def _get_dbus_property(self, interface_name, property_name):
813
553
"""Returns a bound method if one exists which is a D-Bus
814
554
property with the specified name and interface.
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
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)):
823
566
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
830
573
def Get(self, interface_name, property_name):
831
574
"""Standard D-Bus property Get() method, see D-Bus standard.
833
576
prop = self._get_dbus_property(interface_name, property_name)
834
if prop._dbus_access == "write":
577
if prop._dbus_access == u"write":
835
578
raise DBusPropertyAccessException(property_name)
837
if not hasattr(value, "variant_level"):
580
if not hasattr(value, u"variant_level"):
839
582
return type(value)(value, variant_level=value.variant_level+1)
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
842
585
def Set(self, interface_name, property_name, value):
843
586
"""Standard D-Bus property Set() method, see D-Bus standard.
845
588
prop = self._get_dbus_property(interface_name, property_name)
846
if prop._dbus_access == "read":
589
if prop._dbus_access == u"read":
847
590
raise DBusPropertyAccessException(property_name)
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
853
value = dbus.ByteArray(b''.join(chr(byte)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
592
value = dbus.ByteArray(''.join(unichr(byte)
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
859
598
def GetAll(self, interface_name):
860
599
"""Standard D-Bus property GetAll() method, see D-Bus
863
602
Note: Will not include properties with access="write".
866
605
for name, prop in self._get_all_dbus_properties():
867
606
if (interface_name
868
607
and interface_name != prop._dbus_interface):
869
608
# Interface non-empty but did not match
871
610
# Ignore write-only properties
872
if prop._dbus_access == "write":
611
if prop._dbus_access == u"write":
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
614
if not hasattr(value, u"variant_level"):
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
882
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
884
623
path_keyword='object_path',
885
624
connection_keyword='connection')
886
625
def Introspect(self, object_path, connection):
892
631
document = xml.dom.minidom.parseString(xmlstring)
893
632
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
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)
899
for if_tag in document.getElementsByTagName("interface"):
638
for if_tag in document.getElementsByTagName(u"interface"):
900
639
for tag in (make_tag(document, name, prop)
902
641
in self._get_all_dbus_properties()
903
642
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
643
== if_tag.getAttribute(u"name")):
905
644
if_tag.appendChild(tag)
906
645
# Add the names to the return values for the
907
646
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
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")
922
661
document.unlink()
923
662
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
956
# Create an alternate D-Bus interface name based on
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
974
attribute._dbus_signature)
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
994
# Create the "call_both" function and add it to
996
attr[attrname] = fixscope(attribute,
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1004
attr[attrname] = (dbus.service.method
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1025
._dbus_get_args_options
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1036
669
class ClientDBus(Client, DBusObjectWithProperties):
1037
670
"""A Client class using D-Bus
1040
673
dbus_object_path: dbus.ObjectPath
1041
674
bus: dbus.SystemBus()
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1047
676
# dbus.service.Object doesn't use super(), so we can't either.
1049
678
def __init__(self, bus = None, *args, **kwargs):
1051
680
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1054
self._approvals_pending = 0
1055
681
# Only now, when this client is initialized, can it show up on
1057
client_object_name = unicode(self.name).translate(
1058
{ord("."): ord("_"),
1059
ord("-"): ord("_")})
1060
683
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
685
+ self.name.replace(u".", u"_")))
1062
686
DBusObjectWithProperties.__init__(self, self.bus,
1063
687
self.dbus_object_path)
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1068
""" Modify a variable so that it's a property which announces
1069
its changes to DBus.
1071
transform_fun: Function that takes a value and a variant_level
1072
and transforms it to a D-Bus type.
1073
dbus_name: D-Bus name of the variable
1074
type_func: Function that transform the value before sending it
1075
to the D-Bus. Default: no transform
1076
variant_level: D-Bus variant level. Default: 1
1078
attrname = "_{0}".format(dbus_name)
1079
def setter(self, value):
1080
if hasattr(self, "dbus_object_path"):
1081
if (not hasattr(self, attrname) or
1082
type_func(getattr(self, attrname, None))
1083
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1087
self.PropertyChanged(dbus.String(dbus_name),
1089
setattr(self, attrname, value)
1091
return property(lambda self: getattr(self, attrname), setter)
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1130
del notifychangeproperty
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
708
def disable(self, signal = True):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self)
711
if signal and oldstate != self.enabled:
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
1132
717
def __del__(self, *args, **kwargs):
1134
719
self.remove_from_connection()
1135
720
except LookupError:
1137
if hasattr(DBusObjectWithProperties, "__del__"):
722
if hasattr(DBusObjectWithProperties, u"__del__"):
1138
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
724
Client.__del__(self, *args, **kwargs)
1270
841
def StopChecker(self):
1271
842
self.stop_checker()
1275
# ApprovalPending - property
1276
@dbus_service_property(_interface, signature="b", access="read")
1277
def ApprovalPending_dbus_property(self):
1278
return dbus.Boolean(bool(self.approvals_pending))
1280
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1283
def ApprovedByDefault_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.Boolean(self.approved_by_default)
1286
self.approved_by_default = bool(value)
1288
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1291
def ApprovalDelay_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1296
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1299
def ApprovalDuration_dbus_property(self, value=None):
1300
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1306
@dbus_service_property(_interface, signature="s", access="read")
1307
def Name_dbus_property(self):
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
1308
847
return dbus.String(self.name)
1310
# Fingerprint - property
1311
@dbus_service_property(_interface, signature="s", access="read")
1312
def Fingerprint_dbus_property(self):
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
1313
852
return dbus.String(self.fingerprint)
1316
@dbus_service_property(_interface, signature="s",
1318
def Host_dbus_property(self, value=None):
855
@dbus_service_property(_interface, signature=u"s",
857
def host_dbus_property(self, value=None):
1319
858
if value is None: # get
1320
859
return dbus.String(self.host)
1321
self.host = unicode(value)
1323
# Created - property
1324
@dbus_service_property(_interface, signature="s", access="read")
1325
def Created_dbus_property(self):
1326
return datetime_to_dbus(self.created)
1328
# LastEnabled - property
1329
@dbus_service_property(_interface, signature="s", access="read")
1330
def LastEnabled_dbus_property(self):
1331
return datetime_to_dbus(self.last_enabled)
1333
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1336
def Enabled_dbus_property(self, value=None):
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
878
@dbus_service_property(_interface, signature=u"b",
880
def enabled_dbus_property(self, value=None):
1337
881
if value is None: # get
1338
882
return dbus.Boolean(self.enabled)
1344
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1347
def LastCheckedOK_dbus_property(self, value=None):
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
891
def last_checked_ok_dbus_property(self, value=None):
1348
892
if value is not None:
1349
893
self.checked_ok()
1351
return datetime_to_dbus(self.last_checked_ok)
1353
# Expires - property
1354
@dbus_service_property(_interface, signature="s", access="read")
1355
def Expires_dbus_property(self):
1356
return datetime_to_dbus(self.expires)
1358
# LastApprovalRequest - property
1359
@dbus_service_property(_interface, signature="s", access="read")
1360
def LastApprovalRequest_dbus_property(self):
1361
return datetime_to_dbus(self.last_approval_request)
1363
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
1366
def Timeout_dbus_property(self, value=None):
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
901
@dbus_service_property(_interface, signature=u"t",
903
def timeout_dbus_property(self, value=None):
1367
904
if value is None: # get
1368
905
return dbus.UInt64(self.timeout_milliseconds())
1369
906
self.timeout = datetime.timedelta(0, 0, 0, value)
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
1370
912
# Reschedule timeout
1372
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1376
# The timeout has passed
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1382
if (getattr(self, "disable_initiator_tag", None)
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1390
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
1393
def ExtendedTimeout_dbus_property(self, value=None):
1394
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1398
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
1401
def Interval_dbus_property(self, value=None):
913
gobject.source_remove(self.disable_initiator_tag)
914
self.disable_initiator_tag = None
916
_timedelta_to_milliseconds((self
922
# The timeout has passed
925
self.disable_initiator_tag = (gobject.timeout_add
926
(time_to_die, self.disable))
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
931
def interval_dbus_property(self, value=None):
1402
932
if value is None: # get
1403
933
return dbus.UInt64(self.interval_milliseconds())
1404
934
self.interval = datetime.timedelta(0, 0, 0, value)
1405
if getattr(self, "checker_initiator_tag", None) is None:
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
1408
# Reschedule checker run
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1414
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
1417
def Checker_dbus_property(self, value=None):
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
947
@dbus_service_property(_interface, signature=u"s",
949
def checker_dbus_property(self, value=None):
1418
950
if value is None: # get
1419
951
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
952
self.checker_command = value
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
1422
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
1425
def CheckerRunning_dbus_property(self, value=None):
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
961
def checker_running_dbus_property(self, value=None):
1426
962
if value is None: # get
1427
963
return dbus.Boolean(self.checker is not None)
1481
987
Note: This will run in its own forked process."""
1483
989
def handle(self):
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
1487
logger.debug("Pipe FD: %d",
1488
self.server.child_pipe.fileno())
990
logger.info(u"TCP connection from: %s",
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
993
# Open IPC pipe to parent process
994
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1490
995
session = (gnutls.connection
1491
996
.ClientSession(self.request,
1492
997
gnutls.connection
1493
998
.X509Credentials()))
1000
line = self.request.makefile().readline()
1001
logger.debug(u"Protocol version: %r", line)
1003
if int(line.strip().split()[0]) > 1:
1005
except (ValueError, IndexError, RuntimeError), error:
1006
logger.error(u"Unknown protocol version: %s", error)
1495
1009
# Note: gnutls.connection.X509Credentials is really a
1496
1010
# generic GnuTLS certificate credentials object so long as
1497
1011
# no X.509 keys are added to it. Therefore, we can use it
1498
1012
# here despite using OpenPGP certificates.
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1014
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1015
# u"+AES-256-CBC", u"+SHA1",
1016
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1504
1018
# Use a fallback default, since this MUST be set.
1505
1019
priority = self.server.gnutls_priority
1506
1020
if priority is None:
1021
priority = u"NORMAL"
1508
1022
(gnutls.library.functions
1509
1023
.gnutls_priority_set_direct(session._c_object,
1510
1024
priority, None))
1512
# Start communication using the Mandos protocol
1513
# Get protocol number
1514
line = self.request.makefile().readline()
1515
logger.debug("Protocol version: %r", line)
1517
if int(line.strip().split()[0]) > 1:
1519
except (ValueError, IndexError, RuntimeError) as error:
1520
logger.error("Unknown protocol version: %s", error)
1523
# Start GnuTLS connection
1525
1027
session.handshake()
1526
except gnutls.errors.GNUTLSError as error:
1527
logger.warning("Handshake failed: %s", error)
1028
except gnutls.errors.GNUTLSError, error:
1029
logger.warning(u"Handshake failed: %s", error)
1528
1030
# Do not run session.bye() here: the session is not
1529
1031
# established. Just abandon the request.
1531
logger.debug("Handshake succeeded")
1533
approval_required = False
1033
logger.debug(u"Handshake succeeded")
1536
fpr = self.fingerprint(self.peer_certificate
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1542
logger.debug("Fingerprint: %s", fpr)
1545
client = ProxyClient(child_pipe, fpr,
1546
self.client_address)
1550
if self.server.use_dbus:
1552
client.NewRequest(str(self.client_address))
1554
if client.approval_delay:
1555
delay = client.approval_delay
1556
client.approvals_pending += 1
1557
approval_required = True
1560
if not client.enabled:
1561
logger.info("Client %s is disabled",
1563
if self.server.use_dbus:
1565
client.Rejected("Disabled")
1568
if client.approved or not client.approval_delay:
1569
#We are approved or approval is disabled
1571
elif client.approved is None:
1572
logger.info("Client %s needs approval",
1574
if self.server.use_dbus:
1576
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
1580
logger.warning("Client %s was not approved",
1582
if self.server.use_dbus:
1584
client.Rejected("Denied")
1587
#wait until timeout or approved
1588
time = datetime.datetime.now()
1589
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1593
client.changedstate.release()
1594
time2 = datetime.datetime.now()
1595
if (time2 - time) >= delay:
1596
if not client.approved_by_default:
1597
logger.warning("Client %s timed out while"
1598
" waiting for approval",
1600
if self.server.use_dbus:
1602
client.Rejected("Approval timed out")
1607
delay -= time2 - time
1610
while sent_size < len(client.secret):
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1621
logger.info("Sending secret to %s", client.name)
1622
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
1624
if self.server.use_dbus:
1035
fpr = self.fingerprint(self.peer_certificate(session))
1036
except (TypeError, gnutls.errors.GNUTLSError), error:
1037
logger.warning(u"Bad certificate: %s", error)
1040
logger.debug(u"Fingerprint: %s", fpr)
1629
if approval_required:
1630
client.approvals_pending -= 1
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1042
for c in self.server.clients:
1043
if c.fingerprint == fpr:
1047
ipc.write(u"NOTFOUND %s %s\n"
1048
% (fpr, unicode(self.client_address)))
1051
# Have to check if client.still_valid(), since it is
1052
# possible that the client timed out while establishing
1053
# the GnuTLS session.
1054
if not client.still_valid():
1055
ipc.write(u"INVALID %s\n" % client.name)
1058
ipc.write(u"SENDING %s\n" % client.name)
1060
while sent_size < len(client.secret):
1061
sent = session.send(client.secret[sent_size:])
1062
logger.debug(u"Sent: %d, remaining: %d",
1063
sent, len(client.secret)
1064
- (sent_size + sent))
1637
1069
def peer_certificate(session):
1852
1256
for cond, name in
1853
1257
condition_names.iteritems()
1854
1258
if cond & condition)
1855
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1857
# Wait for other process to exit
1861
# Read a request from the child
1862
request = parent_pipe.recv()
1863
command = request[0]
1865
if command == 'init':
1867
address = request[2]
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
1878
mandos_dbus_service.ClientNotFound(fpr,
1880
parent_pipe.send(False)
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1891
parent_pipe.send(True)
1892
# remove the old hook in favor of the new above hook on
1895
if command == 'funcall':
1896
funcname = request[1]
1900
parent_pipe.send(('data', getattr(client_object,
1904
if command == 'getattr':
1905
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1912
if command == 'setattr':
1913
attrname = request[1]
1915
setattr(client_object, attrname, value)
1259
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1262
# Turn the pipe file descriptor into a Python file object
1263
if source not in file_objects:
1264
file_objects[source] = os.fdopen(source, u"r", 1)
1266
# Read a line from the file object
1267
cmdline = file_objects[source].readline()
1268
if not cmdline: # Empty line means end of file
1269
# close the IPC pipe
1270
file_objects[source].close()
1271
del file_objects[source]
1273
# Stop calling this function
1276
logger.debug(u"IPC command: %r", cmdline)
1278
# Parse and act on command
1279
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
if cmd == u"NOTFOUND":
1282
logger.warning(u"Client not found for fingerprint: %s",
1286
mandos_dbus_service.ClientNotFound(args)
1287
elif cmd == u"INVALID":
1288
for client in self.clients:
1289
if client.name == args:
1290
logger.warning(u"Client %s is invalid", args)
1296
logger.error(u"Unknown client %s is invalid", args)
1297
elif cmd == u"SENDING":
1298
for client in self.clients:
1299
if client.name == args:
1300
logger.info(u"Sending secret to %s", client.name)
1307
logger.error(u"Sending secret to unknown client %s",
1310
logger.error(u"Unknown IPC command: %r", cmdline)
1312
# Keep calling this function
1920
1316
def string_to_delta(interval):
1921
1317
"""Parse a string and return a datetime.timedelta
1923
>>> string_to_delta('7d')
1319
>>> string_to_delta(u'7d')
1924
1320
datetime.timedelta(7)
1925
>>> string_to_delta('60s')
1321
>>> string_to_delta(u'60s')
1926
1322
datetime.timedelta(0, 60)
1927
>>> string_to_delta('60m')
1323
>>> string_to_delta(u'60m')
1928
1324
datetime.timedelta(0, 3600)
1929
>>> string_to_delta('24h')
1325
>>> string_to_delta(u'24h')
1930
1326
datetime.timedelta(1)
1931
>>> string_to_delta('1w')
1327
>>> string_to_delta(u'1w')
1932
1328
datetime.timedelta(7)
1933
>>> string_to_delta('5m 30s')
1329
>>> string_to_delta(u'5m 30s')
1934
1330
datetime.timedelta(0, 330)
1936
1332
timevalue = datetime.timedelta(0)
1986
1406
##################################################################
1987
1407
# Parsing of options, both command line and config file
1989
parser = argparse.ArgumentParser()
1990
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
1992
help="show version number and exit")
1993
parser.add_argument("-i", "--interface", metavar="IF",
1994
help="Bind to interface IF")
1995
parser.add_argument("-a", "--address",
1996
help="Address to listen for requests on")
1997
parser.add_argument("-p", "--port", type=int,
1998
help="Port number to receive requests on")
1999
parser.add_argument("--check", action="store_true",
2000
help="Run self-test")
2001
parser.add_argument("--debug", action="store_true",
2002
help="Debug mode; run in foreground and log"
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
help="Debug level for stdout output")
2006
parser.add_argument("--priority", help="GnuTLS"
2007
" priority string (see GnuTLS documentation)")
2008
parser.add_argument("--servicename",
2009
metavar="NAME", help="Zeroconf service name")
2010
parser.add_argument("--configdir",
2011
default="/etc/mandos", metavar="DIR",
2012
help="Directory to search for configuration"
2014
parser.add_argument("--no-dbus", action="store_false",
2015
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2017
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2019
parser.add_argument("--no-restore", action="store_false",
2020
dest="restore", help="Do not restore stored"
2022
parser.add_argument("--statedir", metavar="DIR",
2023
help="Directory to save/restore state in")
2025
options = parser.parse_args()
1409
parser = optparse.OptionParser(version = "%%prog %s" % version)
1410
parser.add_option("-i", u"--interface", type=u"string",
1411
metavar="IF", help=u"Bind to interface IF")
1412
parser.add_option("-a", u"--address", type=u"string",
1413
help=u"Address to listen for requests on")
1414
parser.add_option("-p", u"--port", type=u"int",
1415
help=u"Port number to receive requests on")
1416
parser.add_option("--check", action=u"store_true",
1417
help=u"Run self-test")
1418
parser.add_option("--debug", action=u"store_true",
1419
help=u"Debug mode; run in foreground and log to"
1421
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1422
u" priority string (see GnuTLS documentation)")
1423
parser.add_option("--servicename", type=u"string",
1424
metavar=u"NAME", help=u"Zeroconf service name")
1425
parser.add_option("--configdir", type=u"string",
1426
default=u"/etc/mandos", metavar=u"DIR",
1427
help=u"Directory to search for configuration"
1429
parser.add_option("--no-dbus", action=u"store_false",
1430
dest=u"use_dbus", help=u"Do not provide D-Bus"
1431
u" system bus interface")
1432
parser.add_option("--no-ipv6", action=u"store_false",
1433
dest=u"use_ipv6", help=u"Do not use IPv6")
1434
options = parser.parse_args()[0]
2027
1436
if options.check:
2079
1484
##################################################################
2081
1486
# For convenience
2082
debug = server_settings["debug"]
2083
debuglevel = server_settings["debuglevel"]
2084
use_dbus = server_settings["use_dbus"]
2085
use_ipv6 = server_settings["use_ipv6"]
2086
stored_state_path = os.path.join(server_settings["statedir"],
2090
initlogger(debug, logging.DEBUG)
2095
level = getattr(logging, debuglevel.upper())
2096
initlogger(debug, level)
2098
if server_settings["servicename"] != "Mandos":
1487
debug = server_settings[u"debug"]
1488
use_dbus = server_settings[u"use_dbus"]
1489
use_ipv6 = server_settings[u"use_ipv6"]
1492
syslogger.setLevel(logging.WARNING)
1493
console.setLevel(logging.WARNING)
1495
if server_settings[u"servicename"] != u"Mandos":
2099
1496
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
1497
(u'Mandos (%s) [%%(process)d]:'
1498
u' %%(levelname)s: %%(message)s'
1499
% server_settings[u"servicename"]))
2104
1501
# Parse config file with clients
2105
client_config = configparser.SafeConfigParser(Client
2107
client_config.read(os.path.join(server_settings["configdir"],
1502
client_defaults = { u"timeout": u"1h",
1504
u"checker": u"fping -q -- %%(host)s",
1507
client_config = configparser.SafeConfigParser(client_defaults)
1508
client_config.read(os.path.join(server_settings[u"configdir"],
2110
1511
global mandos_dbus_service
2111
1512
mandos_dbus_service = None
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
1514
tcp_server = MandosServer((server_settings[u"address"],
1515
server_settings[u"port"]),
2116
interface=(server_settings["interface"]
1517
interface=server_settings[u"interface"],
2118
1518
use_ipv6=use_ipv6,
2119
1519
gnutls_priority=
2120
server_settings["priority"],
1520
server_settings[u"priority"],
2121
1521
use_dbus=use_dbus)
2123
pidfilename = "/var/run/mandos.pid"
2125
pidfile = open(pidfilename, "w")
2127
logger.error("Could not open file %r", pidfilename)
1522
pidfilename = u"/var/run/mandos.pid"
1524
pidfile = open(pidfilename, u"w")
1526
logger.error(u"Could not open file %r", pidfilename)
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
1529
uid = pwd.getpwnam(u"_mandos").pw_uid
1530
gid = pwd.getpwnam(u"_mandos").pw_gid
2132
1531
except KeyError:
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
1533
uid = pwd.getpwnam(u"mandos").pw_uid
1534
gid = pwd.getpwnam(u"mandos").pw_gid
2136
1535
except KeyError:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
1537
uid = pwd.getpwnam(u"nobody").pw_uid
1538
gid = pwd.getpwnam(u"nobody").pw_gid
2140
1539
except KeyError:
2146
except OSError as error:
1545
except OSError, error:
2147
1546
if error[0] != errno.EPERM:
1549
# Enable all possible GnuTLS debugging
2151
# Enable all possible GnuTLS debugging
2153
1551
# "Use a log level over 10 to enable all debugging options."
2154
1552
# - GnuTLS manual
2155
1553
gnutls.library.functions.gnutls_global_set_log_level(11)
2157
1555
@gnutls.library.types.gnutls_log_func
2158
1556
def debug_gnutls(level, string):
2159
logger.debug("GnuTLS: %s", string[:-1])
1557
logger.debug(u"GnuTLS: %s", string[:-1])
2161
1559
(gnutls.library.functions
2162
1560
.gnutls_global_set_log_function(debug_gnutls))
2164
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2166
os.dup2(null, sys.stdin.fileno())
2170
# Need to fork before connecting to D-Bus
2172
# Close all input and output, do double fork, etc.
2175
gobject.threads_init()
2177
1562
global main_loop
2178
1563
# From the Avahi example code
2181
1566
bus = dbus.SystemBus()
2182
1567
# End of Avahi example code
2185
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2193
server_settings["use_dbus"] = False
2194
tcp_server.use_dbus = False
1569
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2195
1570
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
1571
service = AvahiService(name = server_settings[u"servicename"],
1572
servicetype = u"_mandos._tcp",
1573
protocol = protocol, bus = bus)
2200
1574
if server_settings["interface"]:
2201
1575
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2204
global multiprocessing_manager
2205
multiprocessing_manager = multiprocessing.Manager()
1576
(str(server_settings[u"interface"])))
2207
1578
client_class = Client
2209
client_class = functools.partial(ClientDBusTransitional,
2212
client_settings = Client.config_parser(client_config)
2213
old_client_settings = {}
2216
# Get client data and settings from last running state.
2217
if server_settings["restore"]:
2219
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2222
os.remove(stored_state_path)
2223
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2226
if e.errno != errno.ENOENT:
2228
except EOFError as e:
2229
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2232
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
2234
# Decide which value to use after restoring saved state.
2235
# We have three different values: Old config file,
2236
# new config file, and saved state.
2237
# New config value takes precedence if it differs from old
2238
# config value, otherwise use saved state.
2239
for name, value in client_settings[client_name].items():
2241
# For each value in new config, check if it
2242
# differs from the old config value (Except for
2243
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2247
client[name] = value
2251
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2255
if client["enabled"]:
2256
if datetime.datetime.utcnow() >= client["expires"]:
2257
if not client["last_checked_ok"]:
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2262
client["enabled"] = False
2263
elif client["last_checker_status"] != 0:
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
2269
client["enabled"] = False
2271
client["expires"] = (datetime.datetime
2273
+ client["timeout"])
2274
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2283
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2290
# Add/remove clients based on new changes made to config
2291
for client_name in (set(old_client_settings)
2292
- set(client_settings)):
2293
del clients_data[client_name]
2294
for client_name in (set(client_settings)
2295
- set(old_client_settings)):
2296
clients_data[client_name] = client_settings[client_name]
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
2300
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
1580
client_class = functools.partial(ClientDBus, bus = bus)
1581
tcp_server.clients.update(set(
1582
client_class(name = section,
1583
config= dict(client_config.items(section)))
1584
for section in client_config.sections()))
2303
1585
if not tcp_server.clients:
2304
logger.warning("No clients defined")
1586
logger.warning(u"No clients defined")
1589
# Redirect stdin so all checkers get /dev/null
1590
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1591
os.dup2(null, sys.stdin.fileno())
1595
# No console logging
1596
logger.removeHandler(console)
1597
# Close all input and output, do double fork, etc.
1601
with closing(pidfile):
1603
pidfile.write(str(pid) + "\n")
1606
logger.error(u"Could not write to file %r with PID %d",
1609
# "pidfile" was never created
1614
"Cleanup function; run on exit"
1617
while tcp_server.clients:
1618
client = tcp_server.clients.pop()
1619
client.disable_hook = None
1622
atexit.register(cleanup)
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2313
logger.error("Could not write to file %r with PID %d",
2316
# "pidfile" was never created
2319
1625
signal.signal(signal.SIGINT, signal.SIG_IGN)
2321
1626
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
1627
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2325
1630
class MandosDBusService(dbus.service.Object):
2326
1631
"""A D-Bus proxy object"""
2327
1632
def __init__(self):
2328
dbus.service.Object.__init__(self, bus, "/")
2329
_interface = "se.recompile.Mandos"
2331
@dbus.service.signal(_interface, signature="o")
2332
def ClientAdded(self, objpath):
2336
@dbus.service.signal(_interface, signature="ss")
2337
def ClientNotFound(self, fingerprint, address):
2341
@dbus.service.signal(_interface, signature="os")
1633
dbus.service.Object.__init__(self, bus, u"/")
1634
_interface = u"se.bsnet.fukt.Mandos"
1636
@dbus.service.signal(_interface, signature=u"oa{sv}")
1637
def ClientAdded(self, objpath, properties):
1641
@dbus.service.signal(_interface, signature=u"s")
1642
def ClientNotFound(self, fingerprint):
1646
@dbus.service.signal(_interface, signature=u"os")
2342
1647
def ClientRemoved(self, objpath, name):
2346
@dbus.service.method(_interface, out_signature="ao")
1651
@dbus.service.method(_interface, out_signature=u"ao")
2347
1652
def GetAllClients(self):
2349
1654
return dbus.Array(c.dbus_object_path
2351
tcp_server.clients.itervalues())
1655
for c in tcp_server.clients)
2353
1657
@dbus.service.method(_interface,
2354
out_signature="a{oa{sv}}")
1658
out_signature=u"a{oa{sv}}")
2355
1659
def GetAllClientsWithProperties(self):
2357
1661
return dbus.Dictionary(
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
1662
((c.dbus_object_path, c.GetAll(u""))
1663
for c in tcp_server.clients),
1664
signature=u"oa{sv}")
2362
@dbus.service.method(_interface, in_signature="o")
1666
@dbus.service.method(_interface, in_signature=u"o")
2363
1667
def RemoveClient(self, object_path):
2365
for c in tcp_server.clients.itervalues():
1669
for c in tcp_server.clients:
2366
1670
if c.dbus_object_path == object_path:
2367
del tcp_server.clients[c.name]
1671
tcp_server.clients.remove(c)
2368
1672
c.remove_from_connection()
2369
1673
# Don't signal anything except ClientRemoved
2370
c.disable(quiet=True)
1674
c.disable(signal=False)
2371
1675
# Emit D-Bus signal
2372
1676
self.ClientRemoved(object_path, c.name)
2374
raise KeyError(object_path)
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2383
"Cleanup function; run on exit"
2386
multiprocessing.active_children()
2387
if not (tcp_server.clients or client_settings):
2390
# Store client before exiting. Secrets are encrypted with key
2391
# based on what config file has. If config file is
2392
# removed/edited, old secret will thus be unrecovable.
2394
with PGPEngine() as pgp:
2395
for client in tcp_server.clients.itervalues():
2396
key = client_settings[client.name]["secret"]
2397
client.encrypted_secret = pgp.encrypt(client.secret,
2401
# A list of attributes that can not be pickled
2403
exclude = set(("bus", "changedstate", "secret",
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
2409
client_dict["encrypted_secret"] = (client
2411
for attr in client.client_structure:
2412
if attr not in exclude:
2413
client_dict[attr] = getattr(client, attr)
2415
clients[client.name] = client_dict
2416
del client_settings[client.name]["secret"]
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
2425
os.rename(tempname, stored_state_path)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2438
# Delete all clients, and settings from config
2439
while tcp_server.clients:
2440
name, client = tcp_server.clients.popitem()
2442
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
2444
client.disable(quiet=True)
2447
mandos_dbus_service.ClientRemoved(client
2450
client_settings.clear()
2452
atexit.register(cleanup)
2454
for client in tcp_server.clients.itervalues():
1682
mandos_dbus_service = MandosDBusService()
1684
for client in tcp_server.clients:
2456
1686
# Emit D-Bus signal
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2458
# Need to initiate checking of clients
2460
client.init_checker()
1687
mandos_dbus_service.ClientAdded(client.dbus_object_path,
2462
1691
tcp_server.enable()
2463
1692
tcp_server.server_activate()