124
148
self.rename_count = 0
125
149
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
154
self.entry_group_state_changed_match = None
126
155
def rename(self):
127
156
"""Derived from the Avahi example code"""
128
157
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
158
logger.critical("No suitable Zeroconf service name found"
159
" after %i retries, exiting.",
131
160
self.rename_count)
132
161
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
163
logger.info("Changing Zeroconf service name to %r ...",
136
165
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
172
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
141
176
self.rename_count += 1
142
177
def remove(self):
143
178
"""Derived from the Avahi example code"""
144
if group is not None:
179
if self.entry_group_state_changed_match is not None:
180
self.entry_group_state_changed_match.remove()
181
self.entry_group_state_changed_match = None
182
if self.group is not None:
147
185
"""Derived from the Avahi example code"""
150
group = dbus.Interface(bus.get_object
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
173
class Client(dbus.service.Object):
187
if self.group is None:
188
self.group = dbus.Interface(
189
self.bus.get_object(avahi.DBUS_NAME,
190
self.server.EntryGroupNew()),
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
self.entry_group_state_changed_match = (
193
self.group.connect_to_signal(
194
'StateChanged', self .entry_group_state_changed))
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
196
self.name, self.type)
197
self.group.AddService(
200
dbus.UInt32(0), # flags
201
self.name, self.type,
202
self.domain, self.host,
203
dbus.UInt16(self.port),
204
avahi.string_array_to_txt_array(self.TXT))
206
def entry_group_state_changed(self, state, error):
207
"""Derived from the Avahi example code"""
208
logger.debug("Avahi entry group state change: %i", state)
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
211
logger.debug("Zeroconf service established.")
212
elif state == avahi.ENTRY_GROUP_COLLISION:
213
logger.info("Zeroconf service name collision.")
215
elif state == avahi.ENTRY_GROUP_FAILURE:
216
logger.critical("Avahi: Error in group state changed %s",
218
raise AvahiGroupError("State changed: %s"
221
"""Derived from the Avahi example code"""
222
if self.group is not None:
225
except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
230
def server_state_changed(self, state, error=None):
231
"""Derived from the Avahi example code"""
232
logger.debug("Avahi server state change: %i", state)
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
240
if state in bad_states:
241
if bad_states[state] is not None:
243
logger.error(bad_states[state])
245
logger.error(bad_states[state] + ": %r", error)
247
elif state == avahi.SERVER_RUNNING:
251
logger.debug("Unknown state: %r", state)
253
logger.debug("Unknown state: %r: %r", state, error)
255
"""Derived from the Avahi example code"""
256
if self.server is None:
257
self.server = dbus.Interface(
258
self.bus.get_object(avahi.DBUS_NAME,
259
avahi.DBUS_PATH_SERVER,
260
follow_name_owner_changes=True),
261
avahi.DBUS_INTERFACE_SERVER)
262
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
264
self.server_state_changed(self.server.GetState())
267
class Client(object):
174
268
"""A representation of a client host served by this server.
176
name: string; from the config file, used in log messages
271
_approved: bool(); 'None' if not yet approved/disapproved
272
approval_delay: datetime.timedelta(); Time to wait for approval
273
approval_duration: datetime.timedelta(); Duration of one approval
274
checker: subprocess.Popen(); a running checker process used
275
to see if the client lives.
276
'None' if no process is running.
277
checker_callback_tag: a gobject event source tag, or None
278
checker_command: string; External command which is run to check
279
if client lives. %() expansions are done at
280
runtime with vars(self) as dict, so that for
281
instance %(name)s can be used in the command.
282
checker_initiator_tag: a gobject event source tag, or None
283
created: datetime.datetime(); (UTC) object creation
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
286
disable_initiator_tag: a gobject event source tag, or None
177
288
fingerprint: string (40 or 32 hexadecimal digits); used to
178
289
uniquely identify the client
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); (UTC) object creation
182
started: datetime.datetime(); (UTC) last started
290
host: string; available for use by the checker command
291
interval: datetime.timedelta(); How often to start a new checker
292
last_approval_request: datetime.datetime(); (UTC) or None
183
293
last_checked_ok: datetime.datetime(); (UTC) or None
184
timeout: datetime.timedelta(); How long from last_checked_ok
185
until this client is invalid
186
interval: datetime.timedelta(); How often to start a new checker
187
stop_hook: If set, called by stop() as stop_hook(self)
188
checker: subprocess.Popen(); a running checker process used
189
to see if the client lives.
190
'None' if no process is running.
191
checker_initiator_tag: a gobject event source tag, or None
192
stop_initiator_tag: - '' -
193
checker_callback_tag: - '' -
194
checker_command: string; External command which is run to check if
195
client lives. %() expansions are done at
196
runtime with vars(self) as dict, so that for
197
instance %(name)s can be used in the command.
199
_timeout: Real variable for 'timeout'
200
_interval: Real variable for 'interval'
201
_timeout_milliseconds: Used when calling gobject.timeout_add()
202
_interval_milliseconds: - '' -
294
last_enabled: datetime.datetime(); (UTC)
295
name: string; from the config file, used in log messages and
297
secret: bytestring; sent verbatim (over TLS) to client
298
timeout: datetime.timedelta(); How long from last_checked_ok
299
until this client is disabled
300
runtime_expansions: Allowed attributes for runtime expansion.
204
def _set_timeout(self, timeout):
205
"Setter function for the 'timeout' attribute"
206
self._timeout = timeout
207
self._timeout_milliseconds = ((self.timeout.days
208
* 24 * 60 * 60 * 1000)
209
+ (self.timeout.seconds * 1000)
210
+ (self.timeout.microseconds
213
self.TimeoutChanged(self._timeout_milliseconds)
214
timeout = property(lambda self: self._timeout, _set_timeout)
217
def _set_interval(self, interval):
218
"Setter function for the 'interval' attribute"
219
self._interval = interval
220
self._interval_milliseconds = ((self.interval.days
221
* 24 * 60 * 60 * 1000)
222
+ (self.interval.seconds
224
+ (self.interval.microseconds
227
self.IntervalChanged(self._interval_milliseconds)
228
interval = property(lambda self: self._interval, _set_interval)
231
def __init__(self, name = None, stop_hook=None, config=None):
303
runtime_expansions = ("approval_delay", "approval_duration",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
306
"last_enabled", "name", "timeout")
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
326
def __init__(self, name = None, disable_hook=None, config=None):
232
327
"""Note: the 'checker' key in 'config' sets the
233
328
'checker_command' attribute and *not* the 'checker'
235
dbus.service.Object.__init__(self, bus,
237
% name.replace(".", "_"))
238
331
if config is None:
241
logger.debug(u"Creating client %r", self.name)
333
logger.debug("Creating client %r", self.name)
242
334
# Uppercase and remove spaces from fingerprint for later
243
335
# comparison purposes with return value from the fingerprint()
245
337
self.fingerprint = (config["fingerprint"].upper()
247
logger.debug(u" Fingerprint: %s", self.fingerprint)
339
logger.debug(" Fingerprint: %s", self.fingerprint)
248
340
if "secret" in config:
249
self.secret = config["secret"].decode(u"base64")
341
self.secret = config["secret"].decode("base64")
250
342
elif "secfile" in config:
251
with closing(open(os.path.expanduser
253
(config["secfile"])))) as secfile:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
254
346
self.secret = secfile.read()
256
raise TypeError(u"No secret or secfile for client %s"
348
raise TypeError("No secret or secfile for client %s"
258
350
self.host = config.get("host", "")
259
351
self.created = datetime.datetime.utcnow()
353
self.last_approval_request = None
354
self.last_enabled = None
261
355
self.last_checked_ok = None
262
356
self.timeout = string_to_delta(config["timeout"])
263
357
self.interval = string_to_delta(config["interval"])
264
self.stop_hook = stop_hook
358
self.disable_hook = disable_hook
265
359
self.checker = None
266
360
self.checker_initiator_tag = None
267
self.stop_initiator_tag = None
361
self.disable_initiator_tag = None
268
362
self.checker_callback_tag = None
269
self.check_command = config["checker"]
363
self.checker_command = config["checker"]
364
self.current_checker_command = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
369
self.approvals_pending = 0
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
376
def send_changedstate(self):
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
272
382
"""Start this client's checker and timeout hooks"""
273
self.started = datetime.datetime.utcnow()
383
if getattr(self, "enabled", False):
386
self.send_changedstate()
387
self.last_enabled = datetime.datetime.utcnow()
274
388
# Schedule a new checker to be started an 'interval' from now,
275
389
# and every interval from then on.
276
390
self.checker_initiator_tag = (gobject.timeout_add
277
(self._interval_milliseconds,
391
(self.interval_milliseconds(),
278
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
279
398
# Also start a new checker *right now*.
280
399
self.start_checker()
281
# Schedule a stop() when 'timeout' has passed
282
self.stop_initiator_tag = (gobject.timeout_add
283
(self._timeout_milliseconds,
286
self.StateChanged(True)
289
"""Stop this client."""
290
if getattr(self, "started", None) is not None:
291
logger.info(u"Stopping client %s", self.name)
401
def disable(self, quiet=True):
402
"""Disable this client."""
403
if not getattr(self, "enabled", False):
294
if getattr(self, "stop_initiator_tag", False):
295
gobject.source_remove(self.stop_initiator_tag)
296
self.stop_initiator_tag = None
406
self.send_changedstate()
408
logger.info("Disabling client %s", self.name)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = None
297
412
if getattr(self, "checker_initiator_tag", False):
298
413
gobject.source_remove(self.checker_initiator_tag)
299
414
self.checker_initiator_tag = None
300
415
self.stop_checker()
305
self.StateChanged(False)
416
if self.disable_hook:
417
self.disable_hook(self)
306
419
# Do not run this again if called by a gobject.timeout_add
309
422
def __del__(self):
310
self.stop_hook = None
423
self.disable_hook = None
313
def checker_callback(self, pid, condition):
426
def checker_callback(self, pid, condition, command):
314
427
"""The checker has completed, so take appropriate actions."""
315
428
self.checker_callback_tag = None
316
429
self.checker = None
317
if (os.WIFEXITED(condition)
318
and (os.WEXITSTATUS(condition) == 0)):
319
logger.info(u"Checker for %(name)s succeeded",
322
self.CheckerCompleted(True)
324
elif not os.WIFEXITED(condition):
325
logger.warning(u"Checker for %(name)s crashed?",
430
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
433
logger.info("Checker for %(name)s succeeded",
437
logger.info("Checker for %(name)s failed",
440
logger.warning("Checker for %(name)s crashed?",
328
self.CheckerCompleted(False)
330
logger.info(u"Checker for %(name)s failed",
333
self.CheckerCompleted(False)
335
def bump_timeout(self):
443
def checked_ok(self):
336
444
"""Bump up the timeout for this client.
337
446
This should only be called when the client has been seen,
340
449
self.last_checked_ok = datetime.datetime.utcnow()
341
gobject.source_remove(self.stop_initiator_tag)
342
self.stop_initiator_tag = (gobject.timeout_add
343
(self._timeout_milliseconds,
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
455
def need_approval(self):
456
self.last_approval_request = datetime.datetime.utcnow()
346
458
def start_checker(self):
347
459
"""Start a new checker subprocess if one is not running.
348
461
If a checker already exists, leave it running and do
350
463
# The reason for not killing a running checker is that if we
398
537
self.checker_callback_tag = None
399
538
if getattr(self, "checker", None) is None:
401
logger.debug(u"Stopping checker for %(name)s", vars(self))
540
logger.debug("Stopping checker for %(name)s", vars(self))
403
542
os.kill(self.checker.pid, signal.SIGTERM)
405
544
#if self.checker.poll() is None:
406
545
# os.kill(self.checker.pid, signal.SIGKILL)
407
except OSError, error:
546
except OSError as error:
408
547
if error.errno != errno.ESRCH: # No such process
410
549
self.checker = None
412
def still_valid(self):
413
"""Has the timeout not yet passed for this client?"""
416
now = datetime.datetime.utcnow()
417
if self.last_checked_ok is None:
418
return now < (self.created + self.timeout)
420
return now < (self.last_checked_ok + self.timeout)
422
## D-Bus methods & signals
423
_interface = u"org.mandos_system.Mandos.Client"
425
def _datetime_to_dbus_struct(dt):
426
return dbus.Struct(dt.year, dt.month, dt.day, dt.hour,
427
dt.minute, dt.second, dt.microsecond,
430
# BumpTimeout - method
431
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
432
BumpTimeout.__name__ = "BumpTimeout"
434
# IntervalChanged - signal
435
@dbus.service.signal(_interface, signature="t")
436
def IntervalChanged(self, t):
551
def dbus_service_property(dbus_interface, signature="v",
552
access="readwrite", byte_arrays=False):
553
"""Decorators for marking methods of a DBusObjectWithProperties to
554
become properties on the D-Bus.
556
The decorated method will be called with no arguments by "Get"
557
and with one argument by "Set".
559
The parameters, where they are supported, are the same as
560
dbus.service.method, except there is only "signature", since the
561
type from Get() and the type sent to Set() is the same.
563
# Encoding deeply encoded byte arrays is not supported yet by the
564
# "Set" method, so we fail early here:
565
if byte_arrays and signature != "ay":
566
raise ValueError("Byte arrays not supported for non-'ay'"
567
" signature %r" % signature)
569
func._dbus_is_property = True
570
func._dbus_interface = dbus_interface
571
func._dbus_signature = signature
572
func._dbus_access = access
573
func._dbus_name = func.__name__
574
if func._dbus_name.endswith("_dbus_property"):
575
func._dbus_name = func._dbus_name[:-14]
576
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
581
class DBusPropertyException(dbus.exceptions.DBusException):
582
"""A base class for D-Bus property-related exceptions
584
def __unicode__(self):
585
return unicode(str(self))
588
class DBusPropertyAccessException(DBusPropertyException):
589
"""A property's access permissions disallows an operation.
594
class DBusPropertyNotFound(DBusPropertyException):
595
"""An attempt was made to access a non-existing property.
600
class DBusObjectWithProperties(dbus.service.Object):
601
"""A D-Bus object with properties.
603
Classes inheriting from this can use the dbus_service_property
604
decorator to expose methods as D-Bus properties. It exposes the
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
612
def _get_all_dbus_properties(self):
613
"""Returns a generator of (name, attribute) pairs
615
return ((prop._dbus_name, prop)
617
inspect.getmembers(self, self._is_dbus_property))
619
def _get_dbus_property(self, interface_name, property_name):
620
"""Returns a bound method if one exists which is a D-Bus
621
property with the specified name and interface.
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
+ interface_name + "."
638
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
640
def Get(self, interface_name, property_name):
641
"""Standard D-Bus property Get() method, see D-Bus standard.
643
prop = self._get_dbus_property(interface_name, property_name)
644
if prop._dbus_access == "write":
645
raise DBusPropertyAccessException(property_name)
647
if not hasattr(value, "variant_level"):
649
return type(value)(value, variant_level=value.variant_level+1)
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
652
def Set(self, interface_name, property_name, value):
653
"""Standard D-Bus property Set() method, see D-Bus standard.
655
prop = self._get_dbus_property(interface_name, property_name)
656
if prop._dbus_access == "read":
657
raise DBusPropertyAccessException(property_name)
658
if prop._dbus_get_args_options["byte_arrays"]:
659
# The byte_arrays option is not supported yet on
660
# signatures other than "ay".
661
if prop._dbus_signature != "ay":
663
value = dbus.ByteArray(''.join(unichr(byte)
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
668
out_signature="a{sv}")
669
def GetAll(self, interface_name):
670
"""Standard D-Bus property GetAll() method, see D-Bus
673
Note: Will not include properties with access="write".
676
for name, prop in self._get_all_dbus_properties():
678
and interface_name != prop._dbus_interface):
679
# Interface non-empty but did not match
681
# Ignore write-only properties
682
if prop._dbus_access == "write":
685
if not hasattr(value, "variant_level"):
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
694
path_keyword='object_path',
695
connection_keyword='connection')
696
def Introspect(self, object_path, connection):
697
"""Standard D-Bus method, overloaded to insert property tags.
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
702
document = xml.dom.minidom.parseString(xmlstring)
703
def make_tag(document, name, prop):
704
e = document.createElement("property")
705
e.setAttribute("name", name)
706
e.setAttribute("type", prop._dbus_signature)
707
e.setAttribute("access", prop._dbus_access)
709
for if_tag in document.getElementsByTagName("interface"):
710
for tag in (make_tag(document, name, prop)
712
in self._get_all_dbus_properties()
713
if prop._dbus_interface
714
== if_tag.getAttribute("name")):
715
if_tag.appendChild(tag)
716
# Add the names to the return values for the
717
# "org.freedesktop.DBus.Properties" methods
718
if (if_tag.getAttribute("name")
719
== "org.freedesktop.DBus.Properties"):
720
for cn in if_tag.getElementsByTagName("method"):
721
if cn.getAttribute("name") == "Get":
722
for arg in cn.getElementsByTagName("arg"):
723
if (arg.getAttribute("direction")
725
arg.setAttribute("name", "value")
726
elif cn.getAttribute("name") == "GetAll":
727
for arg in cn.getElementsByTagName("arg"):
728
if (arg.getAttribute("direction")
730
arg.setAttribute("name", "props")
731
xmlstring = document.toxml("utf-8")
733
except (AttributeError, xml.dom.DOMException,
734
xml.parsers.expat.ExpatError) as error:
735
logger.error("Failed to override Introspection method",
740
class ClientDBus(Client, DBusObjectWithProperties):
741
"""A Client class using D-Bus
744
dbus_object_path: dbus.ObjectPath
745
bus: dbus.SystemBus()
748
runtime_expansions = (Client.runtime_expansions
749
+ ("dbus_object_path",))
751
# dbus.service.Object doesn't use super(), so we can't either.
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
756
Client.__init__(self, *args, **kwargs)
757
# Only now, when this client is initialized, can it show up on
759
client_object_name = unicode(self.name).translate(
762
self.dbus_object_path = (dbus.ObjectPath
763
("/clients/" + client_object_name))
764
DBusObjectWithProperties.__init__(self, self.bus,
765
self.dbus_object_path)
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
811
def __del__(self, *args, **kwargs):
813
self.remove_from_connection()
816
if hasattr(DBusObjectWithProperties, "__del__"):
817
DBusObjectWithProperties.__del__(self, *args, **kwargs)
818
Client.__del__(self, *args, **kwargs)
820
def checker_callback(self, pid, condition, command,
822
self.checker_callback_tag = None
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
827
if os.WIFEXITED(condition):
828
exitstatus = os.WEXITSTATUS(condition)
830
self.CheckerCompleted(dbus.Int16(exitstatus),
831
dbus.Int64(condition),
832
dbus.String(command))
835
self.CheckerCompleted(dbus.Int16(-1),
836
dbus.Int64(condition),
837
dbus.String(command))
839
return Client.checker_callback(self, pid, condition, command,
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
859
def start_checker(self, *args, **kwargs):
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
864
old_checker_pid = None
865
r = Client.start_checker(self, *args, **kwargs)
866
# Only if new checker process was started
867
if (self.checker is not None
868
and old_checker_pid != self.checker.pid):
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
885
def _reset_approved(self):
886
self._approved = None
889
def approve(self, value=True):
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
440
902
# CheckerCompleted - signal
441
@dbus.service.signal(_interface, signature="b")
442
def CheckerCompleted(self, success):
903
@dbus.service.signal(_interface, signature="nxs")
904
def CheckerCompleted(self, exitcode, waitstatus, command):
446
# CheckerIsRunning - method
447
@dbus.service.method(_interface, out_signature="b")
448
def CheckerIsRunning(self):
449
"D-Bus getter method"
450
return self.checker is not None
452
908
# CheckerStarted - signal
453
909
@dbus.service.signal(_interface, signature="s")
454
910
def CheckerStarted(self, command):
458
# GetChecker - method
459
@dbus.service.method(_interface, out_signature="s")
460
def GetChecker(self):
461
"D-Bus getter method"
462
return self.checker_command
464
# GetCreated - method
465
@dbus.service.method(_interface, out_signature="(nyyyyyu)")
466
def GetCreated(self):
467
"D-Bus getter method"
468
return datetime_to_dbus_struct(self.created)
470
# GetFingerprint - method
471
@dbus.service.method(_interface, out_signature="s")
472
def GetFingerprint(self):
473
"D-Bus getter method"
474
return self.fingerprint
477
@dbus.service.method(_interface, out_signature="s")
479
"D-Bus getter method"
482
# GetInterval - method
483
@dbus.service.method(_interface, out_signature="t")
484
def GetInterval(self):
485
"D-Bus getter method"
486
return self._interval_milliseconds
489
@dbus.service.method(_interface, out_signature="s")
491
"D-Bus getter method"
494
# GetStarted - method
495
@dbus.service.method(_interface, out_signature="(nyyyyyu)")
496
def GetStarted(self):
497
"D-Bus getter method"
498
if self.started is not None:
499
return datetime_to_dbus_struct(self.started)
501
return dbus.Struct(0, 0, 0, 0, 0, 0, 0,
504
# GetTimeout - method
505
@dbus.service.method(_interface, out_signature="t")
506
def GetTimeout(self):
507
"D-Bus getter method"
508
return self._timeout_milliseconds
510
# SetChecker - method
511
@dbus.service.method(_interface, in_signature="s")
512
def SetChecker(self, checker):
513
"D-Bus setter method"
514
self.checker_command = checker
517
@dbus.service.method(_interface, in_signature="s")
518
def SetHost(self, host):
519
"D-Bus setter method"
522
# SetInterval - method
523
@dbus.service.method(_interface, in_signature="t")
524
def SetInterval(self, milliseconds):
525
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
527
# SetTimeout - method
528
@dbus.service.method(_interface, in_signature="t")
529
def SetTimeout(self, milliseconds):
530
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
533
@dbus.service.method(_interface, in_signature="ay",
535
def SetSecret(self, secret):
536
"D-Bus setter method"
537
self.secret = str(secret)
540
Start = dbus.service.method(_interface)(start)
541
Start.__name__ = "Start"
914
# PropertyChanged - signal
915
@dbus.service.signal(_interface, signature="sv")
916
def PropertyChanged(self, property, value):
921
@dbus.service.signal(_interface)
924
Is sent after a successful transfer of secret from the Mandos
925
server to mandos-client
930
@dbus.service.signal(_interface, signature="s")
931
def Rejected(self, reason):
935
# NeedApproval - signal
936
@dbus.service.signal(_interface, signature="tb")
937
def NeedApproval(self, timeout, default):
939
return self.need_approval()
944
@dbus.service.method(_interface, in_signature="b")
945
def Approve(self, value):
949
@dbus.service.method(_interface)
954
@dbus.service.method(_interface)
543
959
# StartChecker - method
544
StartChecker = dbus.service.method(_interface)(start_checker)
545
StartChecker.__name__ = "StartChecker"
547
# StateChanged - signal
548
@dbus.service.signal(_interface, signature="b")
549
def StateChanged(self, started):
553
# StillValid - method
554
StillValid = (dbus.service.method(_interface, out_signature="b")
556
StillValid.__name__ = "StillValid"
559
Stop = dbus.service.method(_interface)(stop)
560
Stop.__name__ = "Stop"
960
@dbus.service.method(_interface)
961
def StartChecker(self):
966
@dbus.service.method(_interface)
562
971
# StopChecker - method
563
StopChecker = dbus.service.method(_interface)(stop_checker)
564
StopChecker.__name__ = "StopChecker"
566
# TimeoutChanged - signal
567
@dbus.service.signal(_interface, signature="t")
568
def TimeoutChanged(self, t):
572
del _datetime_to_dbus_struct
972
@dbus.service.method(_interface)
973
def StopChecker(self):
978
# ApprovalPending - property
979
@dbus_service_property(_interface, signature="b", access="read")
980
def ApprovalPending_dbus_property(self):
981
return dbus.Boolean(bool(self.approvals_pending))
983
# ApprovedByDefault - property
984
@dbus_service_property(_interface, signature="b",
986
def ApprovedByDefault_dbus_property(self, value=None):
987
if value is None: # get
988
return dbus.Boolean(self.approved_by_default)
989
self.approved_by_default = bool(value)
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
994
# ApprovalDelay - property
995
@dbus_service_property(_interface, signature="t",
997
def ApprovalDelay_dbus_property(self, value=None):
998
if value is None: # get
999
return dbus.UInt64(self.approval_delay_milliseconds())
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1005
# ApprovalDuration - property
1006
@dbus_service_property(_interface, signature="t",
1008
def ApprovalDuration_dbus_property(self, value=None):
1009
if value is None: # get
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1018
@dbus_service_property(_interface, signature="s", access="read")
1019
def Name_dbus_property(self):
1020
return dbus.String(self.name)
1022
# Fingerprint - property
1023
@dbus_service_property(_interface, signature="s", access="read")
1024
def Fingerprint_dbus_property(self):
1025
return dbus.String(self.fingerprint)
1028
@dbus_service_property(_interface, signature="s",
1030
def Host_dbus_property(self, value=None):
1031
if value is None: # get
1032
return dbus.String(self.host)
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1038
# Created - property
1039
@dbus_service_property(_interface, signature="s", access="read")
1040
def Created_dbus_property(self):
1041
return dbus.String(self._datetime_to_dbus(self.created))
1043
# LastEnabled - property
1044
@dbus_service_property(_interface, signature="s", access="read")
1045
def LastEnabled_dbus_property(self):
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1050
# Enabled - property
1051
@dbus_service_property(_interface, signature="b",
1053
def Enabled_dbus_property(self, value=None):
1054
if value is None: # get
1055
return dbus.Boolean(self.enabled)
1061
# LastCheckedOK - property
1062
@dbus_service_property(_interface, signature="s",
1064
def LastCheckedOK_dbus_property(self, value=None):
1065
if value is not None:
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1073
# LastApprovalRequest - property
1074
@dbus_service_property(_interface, signature="s", access="read")
1075
def LastApprovalRequest_dbus_property(self):
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1082
# Timeout - property
1083
@dbus_service_property(_interface, signature="t",
1085
def Timeout_dbus_property(self, value=None):
1086
if value is None: # get
1087
return dbus.UInt64(self.timeout_milliseconds())
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1103
if time_to_die <= 0:
1104
# The timeout has passed
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1110
# Interval - property
1111
@dbus_service_property(_interface, signature="t",
1113
def Interval_dbus_property(self, value=None):
1114
if value is None: # get
1115
return dbus.UInt64(self.interval_milliseconds())
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
1120
if getattr(self, "checker_initiator_tag", None) is None:
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
1128
# Checker - property
1129
@dbus_service_property(_interface, signature="s",
1131
def Checker_dbus_property(self, value=None):
1132
if value is None: # get
1133
return dbus.String(self.checker_command)
1134
self.checker_command = value
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1140
# CheckerRunning - property
1141
@dbus_service_property(_interface, signature="b",
1143
def CheckerRunning_dbus_property(self, value=None):
1144
if value is None: # get
1145
return dbus.Boolean(self.checker is not None)
1147
self.start_checker()
1151
# ObjectPath - property
1152
@dbus_service_property(_interface, signature="o", access="read")
1153
def ObjectPath_dbus_property(self):
1154
return self.dbus_object_path # is already a dbus.ObjectPath
1157
@dbus_service_property(_interface, signature="ay",
1158
access="write", byte_arrays=True)
1159
def Secret_dbus_property(self, value):
1160
self.secret = str(value)
576
def peer_certificate(session):
577
"Return the peer's OpenPGP certificate as a bytestring"
578
# If not an OpenPGP certificate...
579
if (gnutls.library.functions
580
.gnutls_certificate_type_get(session._c_object)
581
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
582
# ...do the normal thing
583
return session.peer_certificate
584
list_size = ctypes.c_uint()
585
cert_list = (gnutls.library.functions
586
.gnutls_certificate_get_peers
587
(session._c_object, ctypes.byref(list_size)))
588
if list_size.value == 0:
591
return ctypes.string_at(cert.data, cert.size)
594
def fingerprint(openpgp):
595
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
596
# New GnuTLS "datum" with the OpenPGP public key
597
datum = (gnutls.library.types
598
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
601
ctypes.c_uint(len(openpgp))))
602
# New empty GnuTLS certificate
603
crt = gnutls.library.types.gnutls_openpgp_crt_t()
604
(gnutls.library.functions
605
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
606
# Import the OpenPGP public key into the certificate
607
(gnutls.library.functions
608
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
609
gnutls.library.constants
610
.GNUTLS_OPENPGP_FMT_RAW))
611
# Verify the self signature in the key
612
crtverify = ctypes.c_uint()
613
(gnutls.library.functions
614
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
615
if crtverify.value != 0:
616
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
617
raise gnutls.errors.CertificateSecurityError("Verify failed")
618
# New buffer for the fingerprint
619
buf = ctypes.create_string_buffer(20)
620
buf_len = ctypes.c_size_t()
621
# Get the fingerprint from the certificate into the buffer
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
624
ctypes.byref(buf_len)))
625
# Deinit the certificate
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
# Convert the buffer to a Python bytestring
628
fpr = ctypes.string_at(buf, buf_len.value)
629
# Convert the bytestring to hexadecimal notation
630
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
634
class TCP_handler(SocketServer.BaseRequestHandler, object):
635
"""A TCP request handler class.
636
Instantiated by IPv6_TCPServer for each request to handle it.
1165
class ProxyClient(object):
1166
def __init__(self, child_pipe, fpr, address):
1167
self._pipe = child_pipe
1168
self._pipe.send(('init', fpr, address))
1169
if not self._pipe.recv():
1172
def __getattribute__(self, name):
1173
if(name == '_pipe'):
1174
return super(ProxyClient, self).__getattribute__(name)
1175
self._pipe.send(('getattr', name))
1176
data = self._pipe.recv()
1177
if data[0] == 'data':
1179
if data[0] == 'function':
1180
def func(*args, **kwargs):
1181
self._pipe.send(('funcall', name, args, kwargs))
1182
return self._pipe.recv()[1]
1185
def __setattr__(self, name, value):
1186
if(name == '_pipe'):
1187
return super(ProxyClient, self).__setattr__(name, value)
1188
self._pipe.send(('setattr', name, value))
1191
class ClientHandler(socketserver.BaseRequestHandler, object):
1192
"""A class to handle client connections.
1194
Instantiated once for each connection to handle it.
637
1195
Note: This will run in its own forked process."""
639
1197
def handle(self):
640
logger.info(u"TCP connection from: %s",
641
unicode(self.client_address))
642
session = (gnutls.connection
643
.ClientSession(self.request,
647
line = self.request.makefile().readline()
648
logger.debug(u"Protocol version: %r", line)
650
if int(line.strip().split()[0]) > 1:
652
except (ValueError, IndexError, RuntimeError), error:
653
logger.error(u"Unknown protocol version: %s", error)
656
# Note: gnutls.connection.X509Credentials is really a generic
657
# GnuTLS certificate credentials object so long as no X.509
658
# keys are added to it. Therefore, we can use it here despite
659
# using OpenPGP certificates.
661
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
662
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
664
# Use a fallback default, since this MUST be set.
665
priority = self.server.settings.get("priority", "NORMAL")
666
(gnutls.library.functions
667
.gnutls_priority_set_direct(session._c_object,
672
except gnutls.errors.GNUTLSError, error:
673
logger.warning(u"Handshake failed: %s", error)
674
# Do not run session.bye() here: the session is not
675
# established. Just abandon the request.
678
fpr = fingerprint(peer_certificate(session))
679
except (TypeError, gnutls.errors.GNUTLSError), error:
680
logger.warning(u"Bad certificate: %s", error)
683
logger.debug(u"Fingerprint: %s", fpr)
684
for c in self.server.clients:
685
if c.fingerprint == fpr:
689
logger.warning(u"Client not found for fingerprint: %s",
693
# Have to check if client.still_valid(), since it is possible
694
# that the client timed out while establishing the GnuTLS
696
if not client.still_valid():
697
logger.warning(u"Client %(name)s is invalid",
701
## This won't work here, since we're in a fork.
702
# client.bump_timeout()
704
while sent_size < len(client.secret):
705
sent = session.send(client.secret[sent_size:])
706
logger.debug(u"Sent: %d, remaining: %d",
707
sent, len(client.secret)
708
- (sent_size + sent))
713
class IPv6_TCPServer(SocketServer.ForkingMixIn,
714
SocketServer.TCPServer, object):
715
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1199
logger.info("TCP connection from: %s",
1200
unicode(self.client_address))
1201
logger.debug("Pipe FD: %d",
1202
self.server.child_pipe.fileno())
1204
session = (gnutls.connection
1205
.ClientSession(self.request,
1207
.X509Credentials()))
1209
# Note: gnutls.connection.X509Credentials is really a
1210
# generic GnuTLS certificate credentials object so long as
1211
# no X.509 keys are added to it. Therefore, we can use it
1212
# here despite using OpenPGP certificates.
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1215
# "+AES-256-CBC", "+SHA1",
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1218
# Use a fallback default, since this MUST be set.
1219
priority = self.server.gnutls_priority
1220
if priority is None:
1222
(gnutls.library.functions
1223
.gnutls_priority_set_direct(session._c_object,
1226
# Start communication using the Mandos protocol
1227
# Get protocol number
1228
line = self.request.makefile().readline()
1229
logger.debug("Protocol version: %r", line)
1231
if int(line.strip().split()[0]) > 1:
1233
except (ValueError, IndexError, RuntimeError) as error:
1234
logger.error("Unknown protocol version: %s", error)
1237
# Start GnuTLS connection
1240
except gnutls.errors.GNUTLSError as error:
1241
logger.warning("Handshake failed: %s", error)
1242
# Do not run session.bye() here: the session is not
1243
# established. Just abandon the request.
1245
logger.debug("Handshake succeeded")
1247
approval_required = False
1250
fpr = self.fingerprint(self.peer_certificate
1253
gnutls.errors.GNUTLSError) as error:
1254
logger.warning("Bad certificate: %s", error)
1256
logger.debug("Fingerprint: %s", fpr)
1259
client = ProxyClient(child_pipe, fpr,
1260
self.client_address)
1264
if client.approval_delay:
1265
delay = client.approval_delay
1266
client.approvals_pending += 1
1267
approval_required = True
1270
if not client.enabled:
1271
logger.info("Client %s is disabled",
1273
if self.server.use_dbus:
1275
client.Rejected("Disabled")
1278
if client._approved or not client.approval_delay:
1279
#We are approved or approval is disabled
1281
elif client._approved is None:
1282
logger.info("Client %s needs approval",
1284
if self.server.use_dbus:
1286
client.NeedApproval(
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
1290
logger.warning("Client %s was not approved",
1292
if self.server.use_dbus:
1294
client.Rejected("Denied")
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1299
time = datetime.datetime.now()
1300
client.changedstate.acquire()
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1302
client.changedstate.release()
1303
time2 = datetime.datetime.now()
1304
if (time2 - time) >= delay:
1305
if not client.approved_by_default:
1306
logger.warning("Client %s timed out while"
1307
" waiting for approval",
1309
if self.server.use_dbus:
1311
client.Rejected("Approval timed out")
1316
delay -= time2 - time
1319
while sent_size < len(client.secret):
1321
sent = session.send(client.secret[sent_size:])
1322
except gnutls.errors.GNUTLSError as error:
1323
logger.warning("gnutls send failed")
1325
logger.debug("Sent: %d, remaining: %d",
1326
sent, len(client.secret)
1327
- (sent_size + sent))
1330
logger.info("Sending secret to %s", client.name)
1331
# bump the timeout as if seen
1333
if self.server.use_dbus:
1338
if approval_required:
1339
client.approvals_pending -= 1
1342
except gnutls.errors.GNUTLSError as error:
1343
logger.warning("GnuTLS bye failed")
1346
def peer_certificate(session):
1347
"Return the peer's OpenPGP certificate as a bytestring"
1348
# If not an OpenPGP certificate...
1349
if (gnutls.library.functions
1350
.gnutls_certificate_type_get(session._c_object)
1351
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1352
# ...do the normal thing
1353
return session.peer_certificate
1354
list_size = ctypes.c_uint(1)
1355
cert_list = (gnutls.library.functions
1356
.gnutls_certificate_get_peers
1357
(session._c_object, ctypes.byref(list_size)))
1358
if not bool(cert_list) and list_size.value != 0:
1359
raise gnutls.errors.GNUTLSError("error getting peer"
1361
if list_size.value == 0:
1364
return ctypes.string_at(cert.data, cert.size)
1367
def fingerprint(openpgp):
1368
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1369
# New GnuTLS "datum" with the OpenPGP public key
1370
datum = (gnutls.library.types
1371
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1374
ctypes.c_uint(len(openpgp))))
1375
# New empty GnuTLS certificate
1376
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1377
(gnutls.library.functions
1378
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1379
# Import the OpenPGP public key into the certificate
1380
(gnutls.library.functions
1381
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
gnutls.library.constants
1383
.GNUTLS_OPENPGP_FMT_RAW))
1384
# Verify the self signature in the key
1385
crtverify = ctypes.c_uint()
1386
(gnutls.library.functions
1387
.gnutls_openpgp_crt_verify_self(crt, 0,
1388
ctypes.byref(crtverify)))
1389
if crtverify.value != 0:
1390
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1391
raise (gnutls.errors.CertificateSecurityError
1393
# New buffer for the fingerprint
1394
buf = ctypes.create_string_buffer(20)
1395
buf_len = ctypes.c_size_t()
1396
# Get the fingerprint from the certificate into the buffer
1397
(gnutls.library.functions
1398
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
ctypes.byref(buf_len)))
1400
# Deinit the certificate
1401
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1402
# Convert the buffer to a Python bytestring
1403
fpr = ctypes.string_at(buf, buf_len.value)
1404
# Convert the bytestring to hexadecimal notation
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1409
class MultiprocessingMixIn(object):
1410
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1411
def sub_process_main(self, request, address):
1413
self.finish_request(request, address)
1415
self.handle_error(request, address)
1416
self.close_request(request)
1418
def process_request(self, request, address):
1419
"""Start a new process to process the request."""
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1424
""" adds a pipe to the MixIn """
1425
def process_request(self, request, client_address):
1426
"""Overrides and wraps the original process_request().
1428
This function creates a new pipe in self.pipe
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
1434
self.child_pipe.close()
1435
self.add_pipe(parent_pipe)
1437
def add_pipe(self, parent_pipe):
1438
"""Dummy function; override as necessary"""
1439
raise NotImplementedError
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1442
socketserver.TCPServer, object):
1443
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
717
settings: Server settings
718
clients: Set() of Client objects
719
1446
enabled: Boolean; whether this server is activated yet
1447
interface: None or a network interface name (string)
1448
use_ipv6: Boolean; to use IPv6 or not
721
address_family = socket.AF_INET6
722
def __init__(self, *args, **kwargs):
723
if "settings" in kwargs:
724
self.settings = kwargs["settings"]
725
del kwargs["settings"]
726
if "clients" in kwargs:
727
self.clients = kwargs["clients"]
728
del kwargs["clients"]
730
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1450
def __init__(self, server_address, RequestHandlerClass,
1451
interface=None, use_ipv6=True):
1452
self.interface = interface
1454
self.address_family = socket.AF_INET6
1455
socketserver.TCPServer.__init__(self, server_address,
1456
RequestHandlerClass)
731
1457
def server_bind(self):
732
1458
"""This overrides the normal server_bind() function
733
1459
to bind to an interface if one was specified, and also NOT to
734
1460
bind to an address or port if they were not specified."""
735
if self.settings["interface"]:
736
# 25 is from /usr/include/asm-i486/socket.h
737
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
739
self.socket.setsockopt(socket.SOL_SOCKET,
741
self.settings["interface"])
742
except socket.error, error:
743
if error[0] == errno.EPERM:
744
logger.error(u"No permission to"
745
u" bind to interface %s",
746
self.settings["interface"])
1461
if self.interface is not None:
1462
if SO_BINDTODEVICE is None:
1463
logger.error("SO_BINDTODEVICE does not exist;"
1464
" cannot bind to interface %s",
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1472
except socket.error as error:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1477
elif error[0] == errno.ENOPROTOOPT:
1478
logger.error("SO_BINDTODEVICE not available;"
1479
" cannot bind to interface %s",
749
1483
# Only bind(2) the socket if we really need to.
750
1484
if self.server_address[0] or self.server_address[1]:
751
1485
if not self.server_address[0]:
753
self.server_address = (in6addr_any,
1486
if self.address_family == socket.AF_INET6:
1487
any_address = "::" # in6addr_any
1489
any_address = socket.INADDR_ANY
1490
self.server_address = (any_address,
754
1491
self.server_address[1])
755
1492
elif not self.server_address[1]:
756
1493
self.server_address = (self.server_address[0],
758
# if self.settings["interface"]:
1495
# if self.interface:
759
1496
# self.server_address = (self.server_address[0],
762
1499
# if_nametoindex
765
return super(IPv6_TCPServer, self).server_bind()
1501
return socketserver.TCPServer.server_bind(self)
1504
class MandosServer(IPv6_TCPServer):
1508
clients: set of Client objects
1509
gnutls_priority GnuTLS priority string
1510
use_dbus: Boolean; to emit D-Bus signals or not
1512
Assumes a gobject.MainLoop event loop.
1514
def __init__(self, server_address, RequestHandlerClass,
1515
interface=None, use_ipv6=True, clients=None,
1516
gnutls_priority=None, use_dbus=True):
1517
self.enabled = False
1518
self.clients = clients
1519
if self.clients is None:
1520
self.clients = set()
1521
self.use_dbus = use_dbus
1522
self.gnutls_priority = gnutls_priority
1523
IPv6_TCPServer.__init__(self, server_address,
1524
RequestHandlerClass,
1525
interface = interface,
1526
use_ipv6 = use_ipv6)
766
1527
def server_activate(self):
767
1528
if self.enabled:
768
return super(IPv6_TCPServer, self).server_activate()
1529
return socketserver.TCPServer.server_activate(self)
769
1530
def enable(self):
770
1531
self.enabled = True
1532
def add_pipe(self, parent_pipe):
1533
# Call "handle_ipc" for both data and EOF events
1534
gobject.io_add_watch(parent_pipe.fileno(),
1535
gobject.IO_IN | gobject.IO_HUP,
1536
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
1539
def handle_ipc(self, source, condition, parent_pipe=None,
1540
client_object=None):
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1551
conditions_string = ' | '.join(name
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1559
# Read a request from the child
1560
request = parent_pipe.recv()
1561
command = request[0]
1563
if command == 'init':
1565
address = request[2]
1567
for c in self.clients:
1568
if c.fingerprint == fpr:
1572
logger.info("Client not found for fingerprint: %s, ad"
1573
"dress: %s", fpr, address)
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
1577
parent_pipe.send(False)
1580
gobject.io_add_watch(parent_pipe.fileno(),
1581
gobject.IO_IN | gobject.IO_HUP,
1582
functools.partial(self.handle_ipc,
1583
parent_pipe = parent_pipe,
1584
client_object = client))
1585
parent_pipe.send(True)
1586
# remove the old hook in favor of the new above hook on same fileno
1588
if command == 'funcall':
1589
funcname = request[1]
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1595
if command == 'getattr':
1596
attrname = request[1]
1597
if callable(client_object.__getattribute__(attrname)):
1598
parent_pipe.send(('function',))
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1602
if command == 'setattr':
1603
attrname = request[1]
1605
setattr(client_object, attrname, value)
773
1610
def string_to_delta(interval):
774
1611
"""Parse a string and return a datetime.timedelta
776
1613
>>> string_to_delta('7d')
777
1614
datetime.timedelta(7)
778
1615
>>> string_to_delta('60s')