130
110
max_renames: integer; maximum number of renames
131
111
rename_count: integer; counter so we only rename after collisions
132
112
a sensible number of times
133
group: D-Bus Entry Group
135
bus: dbus.SystemBus()
137
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
141
117
self.interface = interface
143
self.type = servicetype
145
self.TXT = TXT if TXT is not None else []
146
125
self.domain = domain
148
127
self.rename_count = 0
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
155
128
def rename(self):
156
129
"""Derived from the Avahi example code"""
157
130
if self.rename_count >= self.max_renames:
158
logger.critical("No suitable Zeroconf service name found"
159
" after %i retries, exiting.",
131
logger.critical(u"No suitable service name found after %i"
132
u" retries, exiting.", rename_count)
161
133
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
163
logger.info("Changing Zeroconf service name to %r ...",
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
134
name = server.GetAlternativeServiceName(name)
135
logger.error(u"Changing name to %r ...", name)
172
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
176
138
self.rename_count += 1
177
139
def remove(self):
178
140
"""Derived from the Avahi example code"""
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:
141
if group is not None:
185
144
"""Derived from the Avahi example code"""
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
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
147
group = dbus.Interface\
148
(bus.get_object(avahi.DBUS_NAME,
149
server.EntryGroupNew()),
150
avahi.DBUS_INTERFACE_ENTRY_GROUP)
151
group.connect_to_signal('StateChanged',
152
entry_group_state_changed)
153
logger.debug(u"Adding service '%s' of type '%s' ...",
154
service.name, service.type)
156
self.interface, # interface
157
avahi.PROTO_INET6, # protocol
158
dbus.UInt32(0), # flags
159
self.name, self.type,
160
self.domain, self.host,
161
dbus.UInt16(self.port),
162
avahi.string_array_to_txt_array(self.TXT))
165
# From the Avahi example code:
166
group = None # our entry group
167
# End of Avahi example code
273
170
class Client(object):
274
171
"""A representation of a client host served by this server.
277
_approved: bool(); 'None' if not yet approved/disapproved
278
approval_delay: datetime.timedelta(); Time to wait for approval
279
approval_duration: datetime.timedelta(); Duration of one approval
280
checker: subprocess.Popen(); a running checker process used
281
to see if the client lives.
282
'None' if no process is running.
283
checker_callback_tag: a gobject event source tag, or None
284
checker_command: string; External command which is run to check
285
if client lives. %() expansions are done at
173
name: string; from the config file, used in log messages
174
fingerprint: string (40 or 32 hexadecimal digits); used to
175
uniquely identify the client
176
secret: bytestring; sent verbatim (over TLS) to client
177
fqdn: string (FQDN); available for use by the checker command
178
created: datetime.datetime(); object creation, not client host
179
last_checked_ok: datetime.datetime() or None if not yet checked OK
180
timeout: datetime.timedelta(); How long from last_checked_ok
181
until this client is invalid
182
interval: datetime.timedelta(); How often to start a new checker
183
stop_hook: If set, called by stop() as stop_hook(self)
184
checker: subprocess.Popen(); a running checker process used
185
to see if the client lives.
186
'None' if no process is running.
187
checker_initiator_tag: a gobject event source tag, or None
188
stop_initiator_tag: - '' -
189
checker_callback_tag: - '' -
190
checker_command: string; External command which is run to check if
191
client lives. %() expansions are done at
286
192
runtime with vars(self) as dict, so that for
287
193
instance %(name)s can be used in the command.
288
checker_initiator_tag: a gobject event source tag, or None
289
created: datetime.datetime(); (UTC) object creation
290
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
294
fingerprint: string (40 or 32 hexadecimal digits); used to
295
uniquely identify the client
296
host: string; available for use by the checker command
297
interval: datetime.timedelta(); How often to start a new checker
298
last_approval_request: datetime.datetime(); (UTC) or None
299
last_checked_ok: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
301
name: string; from the config file, used in log messages and
303
secret: bytestring; sent verbatim (over TLS) to client
304
timeout: datetime.timedelta(); How long from last_checked_ok
305
until this client is disabled
306
extended_timeout: extra long timeout when password has been sent
307
runtime_expansions: Allowed attributes for runtime expansion.
308
expires: datetime.datetime(); time (UTC) when a client will be
195
_timeout: Real variable for 'timeout'
196
_interval: Real variable for 'interval'
197
_timeout_milliseconds: Used when calling gobject.timeout_add()
198
_interval_milliseconds: - '' -
312
runtime_expansions = ("approval_delay", "approval_duration",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
315
"last_enabled", "name", "timeout")
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
332
def __init__(self, name = None, disable_hook=None, config=None):
200
def _set_timeout(self, timeout):
201
"Setter function for 'timeout' attribute"
202
self._timeout = timeout
203
self._timeout_milliseconds = ((self.timeout.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.timeout.seconds * 1000)
206
+ (self.timeout.microseconds
208
timeout = property(lambda self: self._timeout,
211
def _set_interval(self, interval):
212
"Setter function for 'interval' attribute"
213
self._interval = interval
214
self._interval_milliseconds = ((self.interval.days
215
* 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds
218
+ (self.interval.microseconds
220
interval = property(lambda self: self._interval,
223
def __init__(self, name = None, stop_hook=None, config={}):
333
224
"""Note: the 'checker' key in 'config' sets the
334
225
'checker_command' attribute and *not* the 'checker'
339
logger.debug("Creating client %r", self.name)
228
logger.debug(u"Creating client %r", self.name)
340
229
# Uppercase and remove spaces from fingerprint for later
341
230
# comparison purposes with return value from the fingerprint()
343
self.fingerprint = (config["fingerprint"].upper()
345
logger.debug(" Fingerprint: %s", self.fingerprint)
232
self.fingerprint = config["fingerprint"].upper()\
234
logger.debug(u" Fingerprint: %s", self.fingerprint)
346
235
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
236
self.secret = config["secret"].decode(u"base64")
348
237
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
352
self.secret = secfile.read()
238
sf = open(config["secfile"])
239
self.secret = sf.read()
354
raise TypeError("No secret or secfile for client %s"
242
raise TypeError(u"No secret or secfile for client %s"
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
359
self.last_approval_request = None
360
self.last_enabled = None
244
self.fqdn = config.get("fqdn", "")
245
self.created = datetime.datetime.now()
361
246
self.last_checked_ok = None
362
247
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
248
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
249
self.stop_hook = stop_hook
366
250
self.checker = None
367
251
self.checker_initiator_tag = None
368
self.disable_initiator_tag = None
252
self.stop_initiator_tag = None
370
253
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
372
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
377
self.approvals_pending = 0
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
384
def send_changedstate(self):
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
254
self.check_command = config["checker"]
390
256
"""Start this client's checker and timeout hooks"""
391
if getattr(self, "enabled", False):
394
self.send_changedstate()
395
257
# Schedule a new checker to be started an 'interval' from now,
396
258
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
400
# Schedule a disable() when 'timeout' has passed
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
406
self.last_enabled = datetime.datetime.utcnow()
259
self.checker_initiator_tag = gobject.timeout_add\
260
(self._interval_milliseconds,
407
262
# Also start a new checker *right now*.
408
263
self.start_checker()
410
def disable(self, quiet=True):
411
"""Disable this client."""
412
if not getattr(self, "enabled", False):
264
# Schedule a stop() when 'timeout' has passed
265
self.stop_initiator_tag = gobject.timeout_add\
266
(self._timeout_milliseconds,
270
The possibility that a client might be restarted is left open,
271
but not currently used."""
272
# If this client doesn't have a secret, it is already stopped.
274
logger.info(u"Stopping client %s", self.name)
415
self.send_changedstate()
417
logger.info("Disabling client %s", self.name)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
420
self.disable_initiator_tag = None
278
if getattr(self, "stop_initiator_tag", False):
279
gobject.source_remove(self.stop_initiator_tag)
280
self.stop_initiator_tag = None
422
281
if getattr(self, "checker_initiator_tag", False):
423
282
gobject.source_remove(self.checker_initiator_tag)
424
283
self.checker_initiator_tag = None
425
284
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
429
287
# Do not run this again if called by a gobject.timeout_add
432
289
def __del__(self):
433
self.disable_hook = None
436
def checker_callback(self, pid, condition, command):
290
self.stop_hook = None
292
def checker_callback(self, pid, condition):
437
293
"""The checker has completed, so take appropriate actions."""
294
now = datetime.datetime.now()
438
295
self.checker_callback_tag = None
439
296
self.checker = None
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
443
logger.info("Checker for %(name)s succeeded",
447
logger.info("Checker for %(name)s failed",
450
logger.warning("Checker for %(name)s crashed?",
297
if os.WIFEXITED(condition) \
298
and (os.WEXITSTATUS(condition) == 0):
299
logger.info(u"Checker for %(name)s succeeded",
301
self.last_checked_ok = now
302
gobject.source_remove(self.stop_initiator_tag)
303
self.stop_initiator_tag = gobject.timeout_add\
304
(self._timeout_milliseconds,
306
elif not os.WIFEXITED(condition):
307
logger.warning(u"Checker for %(name)s crashed?",
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
456
This should only be called when the client has been seen,
460
timeout = self.timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
468
def need_approval(self):
469
self.last_approval_request = datetime.datetime.utcnow()
310
logger.info(u"Checker for %(name)s failed",
471
312
def start_checker(self):
472
313
"""Start a new checker subprocess if one is not running.
474
314
If a checker already exists, leave it running and do
476
316
# The reason for not killing a running checker is that if we
553
360
logger.debug("Stopping checker for %(name)s", vars(self))
555
362
os.kill(self.checker.pid, signal.SIGTERM)
557
364
#if self.checker.poll() is None:
558
365
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
366
except OSError, error:
560
367
if error.errno != errno.ESRCH: # No such process
562
369
self.checker = None
565
def dbus_service_property(dbus_interface, signature="v",
566
access="readwrite", byte_arrays=False):
567
"""Decorators for marking methods of a DBusObjectWithProperties to
568
become properties on the D-Bus.
570
The decorated method will be called with no arguments by "Get"
571
and with one argument by "Set".
573
The parameters, where they are supported, are the same as
574
dbus.service.method, except there is only "signature", since the
575
type from Get() and the type sent to Set() is the same.
577
# Encoding deeply encoded byte arrays is not supported yet by the
578
# "Set" method, so we fail early here:
579
if byte_arrays and signature != "ay":
580
raise ValueError("Byte arrays not supported for non-'ay'"
581
" signature %r" % signature)
583
func._dbus_is_property = True
584
func._dbus_interface = dbus_interface
585
func._dbus_signature = signature
586
func._dbus_access = access
587
func._dbus_name = func.__name__
588
if func._dbus_name.endswith("_dbus_property"):
589
func._dbus_name = func._dbus_name[:-14]
590
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
595
class DBusPropertyException(dbus.exceptions.DBusException):
596
"""A base class for D-Bus property-related exceptions
598
def __unicode__(self):
599
return unicode(str(self))
602
class DBusPropertyAccessException(DBusPropertyException):
603
"""A property's access permissions disallows an operation.
608
class DBusPropertyNotFound(DBusPropertyException):
609
"""An attempt was made to access a non-existing property.
614
class DBusObjectWithProperties(dbus.service.Object):
615
"""A D-Bus object with properties.
617
Classes inheriting from this can use the dbus_service_property
618
decorator to expose methods as D-Bus properties. It exposes the
619
standard Get(), Set(), and GetAll() methods on the D-Bus.
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
626
def _get_all_dbus_properties(self):
627
"""Returns a generator of (name, attribute) pairs
629
return ((prop._dbus_name, prop)
631
inspect.getmembers(self, self._is_dbus_property))
633
def _get_dbus_property(self, interface_name, property_name):
634
"""Returns a bound method if one exists which is a D-Bus
635
property with the specified name and interface.
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
+ interface_name + "."
652
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
654
def Get(self, interface_name, property_name):
655
"""Standard D-Bus property Get() method, see D-Bus standard.
657
prop = self._get_dbus_property(interface_name, property_name)
658
if prop._dbus_access == "write":
659
raise DBusPropertyAccessException(property_name)
661
if not hasattr(value, "variant_level"):
663
return type(value)(value, variant_level=value.variant_level+1)
665
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
666
def Set(self, interface_name, property_name, value):
667
"""Standard D-Bus property Set() method, see D-Bus standard.
669
prop = self._get_dbus_property(interface_name, property_name)
670
if prop._dbus_access == "read":
671
raise DBusPropertyAccessException(property_name)
672
if prop._dbus_get_args_options["byte_arrays"]:
673
# The byte_arrays option is not supported yet on
674
# signatures other than "ay".
675
if prop._dbus_signature != "ay":
677
value = dbus.ByteArray(''.join(unichr(byte)
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
682
out_signature="a{sv}")
683
def GetAll(self, interface_name):
684
"""Standard D-Bus property GetAll() method, see D-Bus
687
Note: Will not include properties with access="write".
690
for name, prop in self._get_all_dbus_properties():
692
and interface_name != prop._dbus_interface):
693
# Interface non-empty but did not match
695
# Ignore write-only properties
696
if prop._dbus_access == "write":
699
if not hasattr(value, "variant_level"):
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
706
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
708
path_keyword='object_path',
709
connection_keyword='connection')
710
def Introspect(self, object_path, connection):
711
"""Standard D-Bus method, overloaded to insert property tags.
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
716
document = xml.dom.minidom.parseString(xmlstring)
717
def make_tag(document, name, prop):
718
e = document.createElement("property")
719
e.setAttribute("name", name)
720
e.setAttribute("type", prop._dbus_signature)
721
e.setAttribute("access", prop._dbus_access)
723
for if_tag in document.getElementsByTagName("interface"):
724
for tag in (make_tag(document, name, prop)
726
in self._get_all_dbus_properties()
727
if prop._dbus_interface
728
== if_tag.getAttribute("name")):
729
if_tag.appendChild(tag)
730
# Add the names to the return values for the
731
# "org.freedesktop.DBus.Properties" methods
732
if (if_tag.getAttribute("name")
733
== "org.freedesktop.DBus.Properties"):
734
for cn in if_tag.getElementsByTagName("method"):
735
if cn.getAttribute("name") == "Get":
736
for arg in cn.getElementsByTagName("arg"):
737
if (arg.getAttribute("direction")
739
arg.setAttribute("name", "value")
740
elif cn.getAttribute("name") == "GetAll":
741
for arg in cn.getElementsByTagName("arg"):
742
if (arg.getAttribute("direction")
744
arg.setAttribute("name", "props")
745
xmlstring = document.toxml("utf-8")
747
except (AttributeError, xml.dom.DOMException,
748
xml.parsers.expat.ExpatError) as error:
749
logger.error("Failed to override Introspection method",
754
def datetime_to_dbus (dt, variant_level=0):
755
"""Convert a UTC datetime.datetime() to a D-Bus type."""
757
return dbus.String("", variant_level = variant_level)
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
762
class ClientDBus(Client, DBusObjectWithProperties):
763
"""A Client class using D-Bus
766
dbus_object_path: dbus.ObjectPath
767
bus: dbus.SystemBus()
770
runtime_expansions = (Client.runtime_expansions
771
+ ("dbus_object_path",))
773
# dbus.service.Object doesn't use super(), so we can't either.
775
def __init__(self, bus = None, *args, **kwargs):
776
self._approvals_pending = 0
778
Client.__init__(self, *args, **kwargs)
779
# Only now, when this client is initialized, can it show up on
781
client_object_name = unicode(self.name).translate(
784
self.dbus_object_path = (dbus.ObjectPath
785
("/clients/" + client_object_name))
786
DBusObjectWithProperties.__init__(self, self.bus,
787
self.dbus_object_path)
789
def notifychangeproperty(transform_func,
790
dbus_name, type_func=lambda x: x,
792
""" Modify a variable so that its a property that announce its
794
transform_fun: Function that takes a value and transform it to
796
dbus_name: DBus name of the variable
797
type_func: Function that transform the value before sending it
799
variant_level: DBus variant level. default: 1
802
def setter(self, value):
803
old_value = real_value[0]
804
real_value[0] = value
805
if hasattr(self, "dbus_object_path"):
806
if type_func(old_value) != type_func(real_value[0]):
807
dbus_value = transform_func(type_func(real_value[0]),
809
self.PropertyChanged(dbus.String(dbus_name),
812
return property(lambda self: real_value[0], setter)
815
expires = notifychangeproperty(datetime_to_dbus, "Expires")
816
approvals_pending = notifychangeproperty(dbus.Boolean,
819
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
820
last_enabled = notifychangeproperty(datetime_to_dbus,
822
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
823
type_func = lambda checker: checker is not None)
824
last_checked_ok = notifychangeproperty(datetime_to_dbus,
826
last_approval_request = notifychangeproperty(datetime_to_dbus,
827
"LastApprovalRequest")
828
approved_by_default = notifychangeproperty(dbus.Boolean,
830
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
831
type_func = _timedelta_to_milliseconds)
832
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
833
type_func = _timedelta_to_milliseconds)
834
host = notifychangeproperty(dbus.String, "Host")
835
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
836
type_func = _timedelta_to_milliseconds)
837
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
838
type_func = _timedelta_to_milliseconds)
839
interval = notifychangeproperty(dbus.UInt16, "Interval",
840
type_func = _timedelta_to_milliseconds)
841
checker_command = notifychangeproperty(dbus.String, "Checker")
843
del notifychangeproperty
845
def __del__(self, *args, **kwargs):
847
self.remove_from_connection()
850
if hasattr(DBusObjectWithProperties, "__del__"):
851
DBusObjectWithProperties.__del__(self, *args, **kwargs)
852
Client.__del__(self, *args, **kwargs)
854
def checker_callback(self, pid, condition, command,
856
self.checker_callback_tag = None
858
if os.WIFEXITED(condition):
859
exitstatus = os.WEXITSTATUS(condition)
861
self.CheckerCompleted(dbus.Int16(exitstatus),
862
dbus.Int64(condition),
863
dbus.String(command))
866
self.CheckerCompleted(dbus.Int16(-1),
867
dbus.Int64(condition),
868
dbus.String(command))
870
return Client.checker_callback(self, pid, condition, command,
873
def start_checker(self, *args, **kwargs):
874
old_checker = self.checker
875
if self.checker is not None:
876
old_checker_pid = self.checker.pid
878
old_checker_pid = None
879
r = Client.start_checker(self, *args, **kwargs)
880
# Only if new checker process was started
881
if (self.checker is not None
882
and old_checker_pid != self.checker.pid):
884
self.CheckerStarted(self.current_checker_command)
887
def _reset_approved(self):
888
self._approved = None
891
def approve(self, value=True):
892
self.send_changedstate()
893
self._approved = value
894
gobject.timeout_add(_timedelta_to_milliseconds
895
(self.approval_duration),
896
self._reset_approved)
899
## D-Bus methods, signals & properties
900
_interface = "se.bsnet.fukt.Mandos.Client"
904
# CheckerCompleted - signal
905
@dbus.service.signal(_interface, signature="nxs")
906
def CheckerCompleted(self, exitcode, waitstatus, command):
910
# CheckerStarted - signal
911
@dbus.service.signal(_interface, signature="s")
912
def CheckerStarted(self, command):
916
# PropertyChanged - signal
917
@dbus.service.signal(_interface, signature="sv")
918
def PropertyChanged(self, property, value):
923
@dbus.service.signal(_interface)
926
Is sent after a successful transfer of secret from the Mandos
927
server to mandos-client
932
@dbus.service.signal(_interface, signature="s")
933
def Rejected(self, reason):
937
# NeedApproval - signal
938
@dbus.service.signal(_interface, signature="tb")
939
def NeedApproval(self, timeout, default):
941
return self.need_approval()
946
@dbus.service.method(_interface, in_signature="b")
947
def Approve(self, value):
951
@dbus.service.method(_interface)
956
@dbus.service.method(_interface)
961
# StartChecker - method
962
@dbus.service.method(_interface)
963
def StartChecker(self):
968
@dbus.service.method(_interface)
973
# StopChecker - method
974
@dbus.service.method(_interface)
975
def StopChecker(self):
980
# ApprovalPending - property
981
@dbus_service_property(_interface, signature="b", access="read")
982
def ApprovalPending_dbus_property(self):
983
return dbus.Boolean(bool(self.approvals_pending))
985
# ApprovedByDefault - property
986
@dbus_service_property(_interface, signature="b",
988
def ApprovedByDefault_dbus_property(self, value=None):
989
if value is None: # get
990
return dbus.Boolean(self.approved_by_default)
991
self.approved_by_default = bool(value)
993
# ApprovalDelay - property
994
@dbus_service_property(_interface, signature="t",
996
def ApprovalDelay_dbus_property(self, value=None):
997
if value is None: # get
998
return dbus.UInt64(self.approval_delay_milliseconds())
999
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1001
# ApprovalDuration - property
1002
@dbus_service_property(_interface, signature="t",
1004
def ApprovalDuration_dbus_property(self, value=None):
1005
if value is None: # get
1006
return dbus.UInt64(_timedelta_to_milliseconds(
1007
self.approval_duration))
1008
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1011
@dbus_service_property(_interface, signature="s", access="read")
1012
def Name_dbus_property(self):
1013
return dbus.String(self.name)
1015
# Fingerprint - property
1016
@dbus_service_property(_interface, signature="s", access="read")
1017
def Fingerprint_dbus_property(self):
1018
return dbus.String(self.fingerprint)
1021
@dbus_service_property(_interface, signature="s",
1023
def Host_dbus_property(self, value=None):
1024
if value is None: # get
1025
return dbus.String(self.host)
1028
# Created - property
1029
@dbus_service_property(_interface, signature="s", access="read")
1030
def Created_dbus_property(self):
1031
return dbus.String(datetime_to_dbus(self.created))
1033
# LastEnabled - property
1034
@dbus_service_property(_interface, signature="s", access="read")
1035
def LastEnabled_dbus_property(self):
1036
return datetime_to_dbus(self.last_enabled)
1038
# Enabled - property
1039
@dbus_service_property(_interface, signature="b",
1041
def Enabled_dbus_property(self, value=None):
1042
if value is None: # get
1043
return dbus.Boolean(self.enabled)
1049
# LastCheckedOK - property
1050
@dbus_service_property(_interface, signature="s",
1052
def LastCheckedOK_dbus_property(self, value=None):
1053
if value is not None:
1056
return datetime_to_dbus(self.last_checked_ok)
1058
# Expires - property
1059
@dbus_service_property(_interface, signature="s", access="read")
1060
def Expires_dbus_property(self):
1061
return datetime_to_dbus(self.expires)
1063
# LastApprovalRequest - property
1064
@dbus_service_property(_interface, signature="s", access="read")
1065
def LastApprovalRequest_dbus_property(self):
1066
return datetime_to_dbus(self.last_approval_request)
1068
# Timeout - property
1069
@dbus_service_property(_interface, signature="t",
1071
def Timeout_dbus_property(self, value=None):
1072
if value is None: # get
1073
return dbus.UInt64(self.timeout_milliseconds())
1074
self.timeout = datetime.timedelta(0, 0, 0, value)
1075
if getattr(self, "disable_initiator_tag", None) is None:
1077
# Reschedule timeout
1078
gobject.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1081
time_to_die = (self.
1082
_timedelta_to_milliseconds((self
1087
if time_to_die <= 0:
1088
# The timeout has passed
1091
self.expires = (datetime.datetime.utcnow()
1092
+ datetime.timedelta(milliseconds = time_to_die))
1093
self.disable_initiator_tag = (gobject.timeout_add
1094
(time_to_die, self.disable))
1096
# ExtendedTimeout - property
1097
@dbus_service_property(_interface, signature="t",
1099
def ExtendedTimeout_dbus_property(self, value=None):
1100
if value is None: # get
1101
return dbus.UInt64(self.extended_timeout_milliseconds())
1102
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1104
# Interval - property
1105
@dbus_service_property(_interface, signature="t",
1107
def Interval_dbus_property(self, value=None):
1108
if value is None: # get
1109
return dbus.UInt64(self.interval_milliseconds())
1110
self.interval = datetime.timedelta(0, 0, 0, value)
1111
if getattr(self, "checker_initiator_tag", None) is None:
1113
# Reschedule checker run
1114
gobject.source_remove(self.checker_initiator_tag)
1115
self.checker_initiator_tag = (gobject.timeout_add
1116
(value, self.start_checker))
1117
self.start_checker() # Start one now, too
1119
# Checker - property
1120
@dbus_service_property(_interface, signature="s",
1122
def Checker_dbus_property(self, value=None):
1123
if value is None: # get
1124
return dbus.String(self.checker_command)
1125
self.checker_command = value
1127
# CheckerRunning - property
1128
@dbus_service_property(_interface, signature="b",
1130
def CheckerRunning_dbus_property(self, value=None):
1131
if value is None: # get
1132
return dbus.Boolean(self.checker is not None)
1134
self.start_checker()
1138
# ObjectPath - property
1139
@dbus_service_property(_interface, signature="o", access="read")
1140
def ObjectPath_dbus_property(self):
1141
return self.dbus_object_path # is already a dbus.ObjectPath
1144
@dbus_service_property(_interface, signature="ay",
1145
access="write", byte_arrays=True)
1146
def Secret_dbus_property(self, value):
1147
self.secret = str(value)
1152
class ProxyClient(object):
1153
def __init__(self, child_pipe, fpr, address):
1154
self._pipe = child_pipe
1155
self._pipe.send(('init', fpr, address))
1156
if not self._pipe.recv():
1159
def __getattribute__(self, name):
1160
if(name == '_pipe'):
1161
return super(ProxyClient, self).__getattribute__(name)
1162
self._pipe.send(('getattr', name))
1163
data = self._pipe.recv()
1164
if data[0] == 'data':
1166
if data[0] == 'function':
1167
def func(*args, **kwargs):
1168
self._pipe.send(('funcall', name, args, kwargs))
1169
return self._pipe.recv()[1]
1172
def __setattr__(self, name, value):
1173
if(name == '_pipe'):
1174
return super(ProxyClient, self).__setattr__(name, value)
1175
self._pipe.send(('setattr', name, value))
1178
class ClientHandler(socketserver.BaseRequestHandler, object):
1179
"""A class to handle client connections.
1181
Instantiated once for each connection to handle it.
370
def still_valid(self):
371
"""Has the timeout not yet passed for this client?"""
372
now = datetime.datetime.now()
373
if self.last_checked_ok is None:
374
return now < (self.created + self.timeout)
376
return now < (self.last_checked_ok + self.timeout)
379
def peer_certificate(session):
380
"Return the peer's OpenPGP certificate as a bytestring"
381
# If not an OpenPGP certificate...
382
if gnutls.library.functions.gnutls_certificate_type_get\
383
(session._c_object) \
384
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
385
# ...do the normal thing
386
return session.peer_certificate
387
list_size = ctypes.c_uint()
388
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
389
(session._c_object, ctypes.byref(list_size))
390
if list_size.value == 0:
393
return ctypes.string_at(cert.data, cert.size)
396
def fingerprint(openpgp):
397
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
398
# New GnuTLS "datum" with the OpenPGP public key
399
datum = gnutls.library.types.gnutls_datum_t\
400
(ctypes.cast(ctypes.c_char_p(openpgp),
401
ctypes.POINTER(ctypes.c_ubyte)),
402
ctypes.c_uint(len(openpgp)))
403
# New empty GnuTLS certificate
404
crt = gnutls.library.types.gnutls_openpgp_crt_t()
405
gnutls.library.functions.gnutls_openpgp_crt_init\
407
# Import the OpenPGP public key into the certificate
408
gnutls.library.functions.gnutls_openpgp_crt_import\
409
(crt, ctypes.byref(datum),
410
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
411
# New buffer for the fingerprint
412
buffer = ctypes.create_string_buffer(20)
413
buffer_length = ctypes.c_size_t()
414
# Get the fingerprint from the certificate into the buffer
415
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
416
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
417
# Deinit the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
# Convert the buffer to a Python bytestring
420
fpr = ctypes.string_at(buffer, buffer_length.value)
421
# Convert the bytestring to hexadecimal notation
422
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
426
class tcp_handler(SocketServer.BaseRequestHandler, object):
427
"""A TCP request handler class.
428
Instantiated by IPv6_TCPServer for each request to handle it.
1182
429
Note: This will run in its own forked process."""
1184
431
def handle(self):
1185
with contextlib.closing(self.server.child_pipe) as child_pipe:
1186
logger.info("TCP connection from: %s",
1187
unicode(self.client_address))
1188
logger.debug("Pipe FD: %d",
1189
self.server.child_pipe.fileno())
1191
session = (gnutls.connection
1192
.ClientSession(self.request,
1194
.X509Credentials()))
1196
# Note: gnutls.connection.X509Credentials is really a
1197
# generic GnuTLS certificate credentials object so long as
1198
# no X.509 keys are added to it. Therefore, we can use it
1199
# here despite using OpenPGP certificates.
1201
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1202
# "+AES-256-CBC", "+SHA1",
1203
# "+COMP-NULL", "+CTYPE-OPENPGP",
1205
# Use a fallback default, since this MUST be set.
1206
priority = self.server.gnutls_priority
1207
if priority is None:
1209
(gnutls.library.functions
1210
.gnutls_priority_set_direct(session._c_object,
1213
# Start communication using the Mandos protocol
1214
# Get protocol number
1215
line = self.request.makefile().readline()
1216
logger.debug("Protocol version: %r", line)
1218
if int(line.strip().split()[0]) > 1:
1220
except (ValueError, IndexError, RuntimeError) as error:
1221
logger.error("Unknown protocol version: %s", error)
1224
# Start GnuTLS connection
1227
except gnutls.errors.GNUTLSError as error:
1228
logger.warning("Handshake failed: %s", error)
1229
# Do not run session.bye() here: the session is not
1230
# established. Just abandon the request.
1232
logger.debug("Handshake succeeded")
1234
approval_required = False
1237
fpr = self.fingerprint(self.peer_certificate
1240
gnutls.errors.GNUTLSError) as error:
1241
logger.warning("Bad certificate: %s", error)
1243
logger.debug("Fingerprint: %s", fpr)
1246
client = ProxyClient(child_pipe, fpr,
1247
self.client_address)
1251
if client.approval_delay:
1252
delay = client.approval_delay
1253
client.approvals_pending += 1
1254
approval_required = True
1257
if not client.enabled:
1258
logger.info("Client %s is disabled",
1260
if self.server.use_dbus:
1262
client.Rejected("Disabled")
1265
if client._approved or not client.approval_delay:
1266
#We are approved or approval is disabled
1268
elif client._approved is None:
1269
logger.info("Client %s needs approval",
1271
if self.server.use_dbus:
1273
client.NeedApproval(
1274
client.approval_delay_milliseconds(),
1275
client.approved_by_default)
1277
logger.warning("Client %s was not approved",
1279
if self.server.use_dbus:
1281
client.Rejected("Denied")
1284
#wait until timeout or approved
1285
#x = float(client._timedelta_to_milliseconds(delay))
1286
time = datetime.datetime.now()
1287
client.changedstate.acquire()
1288
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1289
client.changedstate.release()
1290
time2 = datetime.datetime.now()
1291
if (time2 - time) >= delay:
1292
if not client.approved_by_default:
1293
logger.warning("Client %s timed out while"
1294
" waiting for approval",
1296
if self.server.use_dbus:
1298
client.Rejected("Approval timed out")
1303
delay -= time2 - time
1306
while sent_size < len(client.secret):
1308
sent = session.send(client.secret[sent_size:])
1309
except gnutls.errors.GNUTLSError as error:
1310
logger.warning("gnutls send failed")
1312
logger.debug("Sent: %d, remaining: %d",
1313
sent, len(client.secret)
1314
- (sent_size + sent))
1317
logger.info("Sending secret to %s", client.name)
1318
# bump the timeout as if seen
1319
client.checked_ok(client.extended_timeout)
1320
if self.server.use_dbus:
1325
if approval_required:
1326
client.approvals_pending -= 1
1329
except gnutls.errors.GNUTLSError as error:
1330
logger.warning("GnuTLS bye failed")
1333
def peer_certificate(session):
1334
"Return the peer's OpenPGP certificate as a bytestring"
1335
# If not an OpenPGP certificate...
1336
if (gnutls.library.functions
1337
.gnutls_certificate_type_get(session._c_object)
1338
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1339
# ...do the normal thing
1340
return session.peer_certificate
1341
list_size = ctypes.c_uint(1)
1342
cert_list = (gnutls.library.functions
1343
.gnutls_certificate_get_peers
1344
(session._c_object, ctypes.byref(list_size)))
1345
if not bool(cert_list) and list_size.value != 0:
1346
raise gnutls.errors.GNUTLSError("error getting peer"
1348
if list_size.value == 0:
1351
return ctypes.string_at(cert.data, cert.size)
1354
def fingerprint(openpgp):
1355
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1356
# New GnuTLS "datum" with the OpenPGP public key
1357
datum = (gnutls.library.types
1358
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1361
ctypes.c_uint(len(openpgp))))
1362
# New empty GnuTLS certificate
1363
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1364
(gnutls.library.functions
1365
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1366
# Import the OpenPGP public key into the certificate
1367
(gnutls.library.functions
1368
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1369
gnutls.library.constants
1370
.GNUTLS_OPENPGP_FMT_RAW))
1371
# Verify the self signature in the key
1372
crtverify = ctypes.c_uint()
1373
(gnutls.library.functions
1374
.gnutls_openpgp_crt_verify_self(crt, 0,
1375
ctypes.byref(crtverify)))
1376
if crtverify.value != 0:
1377
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1378
raise (gnutls.errors.CertificateSecurityError
1380
# New buffer for the fingerprint
1381
buf = ctypes.create_string_buffer(20)
1382
buf_len = ctypes.c_size_t()
1383
# Get the fingerprint from the certificate into the buffer
1384
(gnutls.library.functions
1385
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1386
ctypes.byref(buf_len)))
1387
# Deinit the certificate
1388
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1389
# Convert the buffer to a Python bytestring
1390
fpr = ctypes.string_at(buf, buf_len.value)
1391
# Convert the bytestring to hexadecimal notation
1392
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1396
class MultiprocessingMixIn(object):
1397
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1398
def sub_process_main(self, request, address):
1400
self.finish_request(request, address)
1402
self.handle_error(request, address)
1403
self.close_request(request)
1405
def process_request(self, request, address):
1406
"""Start a new process to process the request."""
1407
multiprocessing.Process(target = self.sub_process_main,
1408
args = (request, address)).start()
1411
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1412
""" adds a pipe to the MixIn """
1413
def process_request(self, request, client_address):
1414
"""Overrides and wraps the original process_request().
1416
This function creates a new pipe in self.pipe
1418
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1420
super(MultiprocessingMixInWithPipe,
1421
self).process_request(request, client_address)
1422
self.child_pipe.close()
1423
self.add_pipe(parent_pipe)
1425
def add_pipe(self, parent_pipe):
1426
"""Dummy function; override as necessary"""
1427
raise NotImplementedError
1430
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1431
socketserver.TCPServer, object):
1432
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
432
logger.info(u"TCP connection from: %s",
433
unicode(self.client_address))
434
session = gnutls.connection.ClientSession\
435
(self.request, gnutls.connection.X509Credentials())
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
440
if int(line.strip().split()[0]) > 1:
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
446
# Note: gnutls.connection.X509Credentials is really a generic
447
# GnuTLS certificate credentials object so long as no X.509
448
# keys are added to it. Therefore, we can use it here despite
449
# using OpenPGP certificates.
451
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
452
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
454
priority = "NORMAL" # Fallback default, since this
456
if self.server.settings["priority"]:
457
priority = self.server.settings["priority"]
458
gnutls.library.functions.gnutls_priority_set_direct\
459
(session._c_object, priority, None);
463
except gnutls.errors.GNUTLSError, error:
464
logger.warning(u"Handshake failed: %s", error)
465
# Do not run session.bye() here: the session is not
466
# established. Just abandon the request.
469
fpr = fingerprint(peer_certificate(session))
470
except (TypeError, gnutls.errors.GNUTLSError), error:
471
logger.warning(u"Bad certificate: %s", error)
474
logger.debug(u"Fingerprint: %s", fpr)
476
for c in self.server.clients:
477
if c.fingerprint == fpr:
481
logger.warning(u"Client not found for fingerprint: %s",
485
# Have to check if client.still_valid(), since it is possible
486
# that the client timed out while establishing the GnuTLS
488
if not client.still_valid():
489
logger.warning(u"Client %(name)s is invalid",
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1435
enabled: Boolean; whether this server is activated yet
1436
interface: None or a network interface name (string)
1437
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1439
def __init__(self, server_address, RequestHandlerClass,
1440
interface=None, use_ipv6=True):
1441
self.interface = interface
1443
self.address_family = socket.AF_INET6
1444
socketserver.TCPServer.__init__(self, server_address,
1445
RequestHandlerClass)
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1446
518
def server_bind(self):
1447
519
"""This overrides the normal server_bind() function
1448
520
to bind to an interface if one was specified, and also NOT to
1449
521
bind to an address or port if they were not specified."""
1450
if self.interface is not None:
1451
if SO_BINDTODEVICE is None:
1452
logger.error("SO_BINDTODEVICE does not exist;"
1453
" cannot bind to interface %s",
1457
self.socket.setsockopt(socket.SOL_SOCKET,
1461
except socket.error as error:
1462
if error[0] == errno.EPERM:
1463
logger.error("No permission to"
1464
" bind to interface %s",
1466
elif error[0] == errno.ENOPROTOOPT:
1467
logger.error("SO_BINDTODEVICE not available;"
1468
" cannot bind to interface %s",
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
526
self.socket.setsockopt(socket.SOL_SOCKET,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.error(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
1472
536
# Only bind(2) the socket if we really need to.
1473
537
if self.server_address[0] or self.server_address[1]:
1474
538
if not self.server_address[0]:
1475
if self.address_family == socket.AF_INET6:
1476
any_address = "::" # in6addr_any
1478
any_address = socket.INADDR_ANY
1479
self.server_address = (any_address,
540
self.server_address = (in6addr_any,
1480
541
self.server_address[1])
1481
elif not self.server_address[1]:
542
elif self.server_address[1] is None:
1482
543
self.server_address = (self.server_address[0],
1484
# if self.interface:
1485
# self.server_address = (self.server_address[0],
1490
return socketserver.TCPServer.server_bind(self)
1493
class MandosServer(IPv6_TCPServer):
1497
clients: set of Client objects
1498
gnutls_priority GnuTLS priority string
1499
use_dbus: Boolean; to emit D-Bus signals or not
1501
Assumes a gobject.MainLoop event loop.
1503
def __init__(self, server_address, RequestHandlerClass,
1504
interface=None, use_ipv6=True, clients=None,
1505
gnutls_priority=None, use_dbus=True):
1506
self.enabled = False
1507
self.clients = clients
1508
if self.clients is None:
1509
self.clients = set()
1510
self.use_dbus = use_dbus
1511
self.gnutls_priority = gnutls_priority
1512
IPv6_TCPServer.__init__(self, server_address,
1513
RequestHandlerClass,
1514
interface = interface,
1515
use_ipv6 = use_ipv6)
1516
def server_activate(self):
1518
return socketserver.TCPServer.server_activate(self)
1521
def add_pipe(self, parent_pipe):
1522
# Call "handle_ipc" for both data and EOF events
1523
gobject.io_add_watch(parent_pipe.fileno(),
1524
gobject.IO_IN | gobject.IO_HUP,
1525
functools.partial(self.handle_ipc,
1526
parent_pipe = parent_pipe))
1528
def handle_ipc(self, source, condition, parent_pipe=None,
1529
client_object=None):
1531
gobject.IO_IN: "IN", # There is data to read.
1532
gobject.IO_OUT: "OUT", # Data can be written (without
1534
gobject.IO_PRI: "PRI", # There is urgent data to read.
1535
gobject.IO_ERR: "ERR", # Error condition.
1536
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1537
# broken, usually for pipes and
1540
conditions_string = ' | '.join(name
1542
condition_names.iteritems()
1543
if cond & condition)
1544
# error or the other end of multiprocessing.Pipe has closed
1545
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1548
# Read a request from the child
1549
request = parent_pipe.recv()
1550
command = request[0]
1552
if command == 'init':
1554
address = request[2]
1556
for c in self.clients:
1557
if c.fingerprint == fpr:
1561
logger.info("Client not found for fingerprint: %s, ad"
1562
"dress: %s", fpr, address)
1565
mandos_dbus_service.ClientNotFound(fpr, address[0])
1566
parent_pipe.send(False)
1569
gobject.io_add_watch(parent_pipe.fileno(),
1570
gobject.IO_IN | gobject.IO_HUP,
1571
functools.partial(self.handle_ipc,
1572
parent_pipe = parent_pipe,
1573
client_object = client))
1574
parent_pipe.send(True)
1575
# remove the old hook in favor of the new above hook on same fileno
1577
if command == 'funcall':
1578
funcname = request[1]
1582
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1584
if command == 'getattr':
1585
attrname = request[1]
1586
if callable(client_object.__getattribute__(attrname)):
1587
parent_pipe.send(('function',))
1589
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1591
if command == 'setattr':
1592
attrname = request[1]
1594
setattr(client_object, attrname, value)
545
return super(type(self), self).server_bind()
1599
548
def string_to_delta(interval):
1600
549
"""Parse a string and return a datetime.timedelta
1602
551
>>> string_to_delta('7d')
1603
552
datetime.timedelta(7)
1604
553
>>> string_to_delta('60s')
1735
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1736
689
"servicename": "Mandos",
1742
692
# Parse config file for server-global settings
1743
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
1744
694
del server_defaults
1745
server_config.read(os.path.join(options.configdir,
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
1747
697
# Convert the SafeConfigParser object to a dict
1748
server_settings = server_config.defaults()
1749
# Use the appropriate methods on the non-string config options
1750
for option in ("debug", "use_dbus", "use_ipv6"):
1751
server_settings[option] = server_config.getboolean("DEFAULT",
1753
if server_settings["port"]:
1754
server_settings["port"] = server_config.getint("DEFAULT",
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
1756
702
del server_config
1758
704
# Override the settings from the config file with command line
1759
705
# options, if set.
1760
706
for option in ("interface", "address", "port", "debug",
1761
"priority", "servicename", "configdir",
1762
"use_dbus", "use_ipv6", "debuglevel"):
707
"priority", "servicename", "configdir"):
1763
708
value = getattr(options, option)
1764
709
if value is not None:
1765
710
server_settings[option] = value
1767
# Force all strings to be unicode
1768
for option in server_settings.keys():
1769
if type(server_settings[option]) is str:
1770
server_settings[option] = unicode(server_settings[option])
1771
712
# Now we have our good server settings in "server_settings"
1773
##################################################################
1776
debug = server_settings["debug"]
1777
debuglevel = server_settings["debuglevel"]
1778
use_dbus = server_settings["use_dbus"]
1779
use_ipv6 = server_settings["use_ipv6"]
1781
if server_settings["servicename"] != "Mandos":
1782
syslogger.setFormatter(logging.Formatter
1783
('Mandos (%s) [%%(process)d]:'
1784
' %%(levelname)s: %%(message)s'
1785
% server_settings["servicename"]))
1787
714
# Parse config file with clients
1788
client_defaults = { "timeout": "5m",
1789
"extended_timeout": "15m",
1791
"checker": "fping -q -- %%(host)s",
1793
"approval_delay": "0s",
1794
"approval_duration": "1s",
715
client_defaults = { "timeout": "1h",
717
"checker": "fping -q -- %%(fqdn)s",
1796
client_config = configparser.SafeConfigParser(client_defaults)
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
1797
720
client_config.read(os.path.join(server_settings["configdir"],
1798
721
"clients.conf"))
1800
global mandos_dbus_service
1801
mandos_dbus_service = None
1803
tcp_server = MandosServer((server_settings["address"],
1804
server_settings["port"]),
1806
interface=(server_settings["interface"]
1810
server_settings["priority"],
1813
pidfilename = "/var/run/mandos.pid"
1815
pidfile = open(pidfilename, "w")
1817
logger.error("Could not open file %r", pidfilename)
1820
uid = pwd.getpwnam("_mandos").pw_uid
1821
gid = pwd.getpwnam("_mandos").pw_gid
1824
uid = pwd.getpwnam("mandos").pw_uid
1825
gid = pwd.getpwnam("mandos").pw_gid
1828
uid = pwd.getpwnam("nobody").pw_uid
1829
gid = pwd.getpwnam("nobody").pw_gid
1836
except OSError as error:
1837
if error[0] != errno.EPERM:
1840
if not debug and not debuglevel:
1841
syslogger.setLevel(logging.WARNING)
1842
console.setLevel(logging.WARNING)
1844
level = getattr(logging, debuglevel.upper())
1845
syslogger.setLevel(level)
1846
console.setLevel(level)
1849
# Enable all possible GnuTLS debugging
1851
# "Use a log level over 10 to enable all debugging options."
1853
gnutls.library.functions.gnutls_global_set_log_level(11)
1855
@gnutls.library.types.gnutls_log_func
1856
def debug_gnutls(level, string):
1857
logger.debug("GnuTLS: %s", string[:-1])
1859
(gnutls.library.functions
1860
.gnutls_global_set_log_function(debug_gnutls))
1862
# Redirect stdin so all checkers get /dev/null
1863
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1864
os.dup2(null, sys.stdin.fileno())
1868
# No console logging
1869
logger.removeHandler(console)
1871
# Need to fork before connecting to D-Bus
1873
# Close all input and output, do double fork, etc.
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
1876
729
global main_loop
1877
732
# From the Avahi example code
1878
733
DBusGMainLoop(set_as_default=True )
1879
734
main_loop = gobject.MainLoop()
1880
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
1881
739
# End of Avahi example code
1884
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1885
bus, do_not_queue=True)
1886
except dbus.exceptions.NameExistsException as e:
1887
logger.error(unicode(e) + ", disabling D-Bus")
1889
server_settings["use_dbus"] = False
1890
tcp_server.use_dbus = False
1891
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1892
service = AvahiService(name = server_settings["servicename"],
1893
servicetype = "_mandos._tcp",
1894
protocol = protocol, bus = bus)
1895
if server_settings["interface"]:
1896
service.interface = (if_nametoindex
1897
(str(server_settings["interface"])))
1899
global multiprocessing_manager
1900
multiprocessing_manager = multiprocessing.Manager()
1902
client_class = Client
1904
client_class = functools.partial(ClientDBus, bus = bus)
1905
def client_config_items(config, section):
1906
special_settings = {
1907
"approved_by_default":
1908
lambda: config.getboolean(section,
1909
"approved_by_default"),
1911
for name, value in config.items(section):
1913
yield (name, special_settings[name]())
1917
tcp_server.clients.update(set(
1918
client_class(name = section,
1919
config= dict(client_config_items(
1920
client_config, section)))
1921
for section in client_config.sections()))
1922
if not tcp_server.clients:
1923
logger.warning("No clients defined")
1929
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
logger.error("Could not write to file %r with PID %d",
1935
# "pidfile" was never created
741
debug = server_settings["debug"]
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
752
def remove_from_clients(client):
753
clients.remove(client)
755
logger.critical(u"No clients left, exiting")
758
clients.update(Set(Client(name = section,
759
stop_hook = remove_from_clients,
761
= dict(client_config.items(section)))
762
for section in client_config.sections()))
768
"Cleanup function; run on exit"
770
# From the Avahi example code
771
if not group is None:
774
# End of Avahi example code
777
client = clients.pop()
778
client.stop_hook = None
781
atexit.register(cleanup)
1939
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
1941
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1942
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1945
class MandosDBusService(dbus.service.Object):
1946
"""A D-Bus proxy object"""
1948
dbus.service.Object.__init__(self, bus, "/")
1949
_interface = "se.bsnet.fukt.Mandos"
1951
@dbus.service.signal(_interface, signature="o")
1952
def ClientAdded(self, objpath):
1956
@dbus.service.signal(_interface, signature="ss")
1957
def ClientNotFound(self, fingerprint, address):
1961
@dbus.service.signal(_interface, signature="os")
1962
def ClientRemoved(self, objpath, name):
1966
@dbus.service.method(_interface, out_signature="ao")
1967
def GetAllClients(self):
1969
return dbus.Array(c.dbus_object_path
1970
for c in tcp_server.clients)
1972
@dbus.service.method(_interface,
1973
out_signature="a{oa{sv}}")
1974
def GetAllClientsWithProperties(self):
1976
return dbus.Dictionary(
1977
((c.dbus_object_path, c.GetAll(""))
1978
for c in tcp_server.clients),
1981
@dbus.service.method(_interface, in_signature="o")
1982
def RemoveClient(self, object_path):
1984
for c in tcp_server.clients:
1985
if c.dbus_object_path == object_path:
1986
tcp_server.clients.remove(c)
1987
c.remove_from_connection()
1988
# Don't signal anything except ClientRemoved
1989
c.disable(quiet=True)
1991
self.ClientRemoved(object_path, c.name)
1993
raise KeyError(object_path)
1997
mandos_dbus_service = MandosDBusService()
2000
"Cleanup function; run on exit"
2003
while tcp_server.clients:
2004
client = tcp_server.clients.pop()
2006
client.remove_from_connection()
2007
client.disable_hook = None
2008
# Don't signal anything except ClientRemoved
2009
client.disable(quiet=True)
2012
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2015
atexit.register(cleanup)
2017
for client in tcp_server.clients:
2020
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2024
tcp_server.server_activate()
788
for client in clients:
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
794
settings=server_settings,
2026
796
# Find out what port we got
2027
797
service.port = tcp_server.socket.getsockname()[1]
2029
logger.info("Now listening on address %r, port %d,"
2030
" flowinfo %d, scope_id %d"
2031
% tcp_server.socket.getsockname())
2033
logger.info("Now listening on address %r, port %d"
2034
% tcp_server.socket.getsockname())
798
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
2036
801
#service.interface = tcp_server.socket.getsockname()[3]
2039
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
2042
except dbus.exceptions.DBusException as error:
2043
logger.critical("DBusException: %s", error)
807
server_state_changed(server.GetState())
808
except dbus.exceptions.DBusException, error:
809
logger.critical(u"DBusException: %s", error)
2046
811
# End of Avahi example code
2048
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2049
814
lambda *args, **kwargs:
2050
(tcp_server.handle_request
2051
(*args[2:], **kwargs) or True))
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
2053
818
logger.debug("Starting main loop")
819
main_loop_started = True
2055
except AvahiError as error:
2056
logger.critical("AvahiError: %s", error)
821
except AvahiError, error:
822
logger.critical(u"AvahiError: %s" + unicode(error))
2059
824
except KeyboardInterrupt:
2061
print("", file=sys.stderr)
2062
logger.debug("Server received KeyboardInterrupt")
2063
logger.debug("Server exiting")
2064
# Must run before the D-Bus bus name gets deregistered
2068
828
if __name__ == '__main__':