127
99
max_renames: integer; maximum number of renames
128
100
rename_count: integer; counter so we only rename after collisions
129
101
a sensible number of times
130
group: D-Bus Entry Group
132
bus: dbus.SystemBus()
134
103
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 32768):
138
106
self.interface = interface
140
self.type = servicetype
142
self.TXT = TXT if TXT is not None else []
143
114
self.domain = domain
145
116
self.rename_count = 0
146
self.max_renames = max_renames
147
self.protocol = protocol
148
self.group = None # our entry group
151
117
def rename(self):
152
118
"""Derived from the Avahi example code"""
153
119
if self.rename_count >= self.max_renames:
154
logger.critical(u"No suitable Zeroconf service name found"
155
u" after %i retries, exiting.",
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
159
logger.info(u"Changing Zeroconf service name to %r ...",
161
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
122
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
125
syslogger.setFormatter(logging.Formatter\
126
('Mandos (%s): %%(levelname)s:'
127
' %%(message)s' % name))
167
130
self.rename_count += 1
168
131
def remove(self):
169
132
"""Derived from the Avahi example code"""
170
if self.group is not None:
133
if group is not None:
173
136
"""Derived from the Avahi example code"""
174
if self.group is None:
175
self.group = dbus.Interface(
176
self.bus.get_object(avahi.DBUS_NAME,
177
self.server.EntryGroupNew()),
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
181
.entry_group_state_changed)
182
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
183
self.name, self.type)
184
self.group.AddService(
187
dbus.UInt32(0), # flags
188
self.name, self.type,
189
self.domain, self.host,
190
dbus.UInt16(self.port),
191
avahi.string_array_to_txt_array(self.TXT))
193
def entry_group_state_changed(self, state, error):
194
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
199
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
202
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
205
raise AvahiGroupError(u"State changed: %s"
208
"""Derived from the Avahi example code"""
209
if self.group is not None:
212
def server_state_changed(self, state):
213
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
217
elif state == avahi.SERVER_RUNNING:
220
"""Derived from the Avahi example code"""
221
if self.server is None:
222
self.server = dbus.Interface(
223
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
225
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
228
self.server_state_changed(self.server.GetState())
139
group = dbus.Interface\
140
(bus.get_object(avahi.DBUS_NAME,
141
server.EntryGroupNew()),
142
avahi.DBUS_INTERFACE_ENTRY_GROUP)
143
group.connect_to_signal('StateChanged',
144
entry_group_state_changed)
145
logger.debug(u"Adding service '%s' of type '%s' ...",
146
service.name, service.type)
148
self.interface, # interface
149
avahi.PROTO_INET6, # protocol
150
dbus.UInt32(0), # flags
151
self.name, self.type,
152
self.domain, self.host,
153
dbus.UInt16(self.port),
154
avahi.string_array_to_txt_array(self.TXT))
157
# From the Avahi example code:
158
group = None # our entry group
159
# End of Avahi example code
231
162
class Client(object):
232
163
"""A representation of a client host served by this server.
235
name: string; from the config file, used in log messages and
165
name: string; from the config file, used in log messages
237
166
fingerprint: string (40 or 32 hexadecimal digits); used to
238
167
uniquely identify the client
239
secret: bytestring; sent verbatim (over TLS) to client
240
host: string; available for use by the checker command
241
created: datetime.datetime(); (UTC) object creation
242
last_enabled: datetime.datetime(); (UTC)
244
last_checked_ok: datetime.datetime(); (UTC) or None
245
timeout: datetime.timedelta(); How long from last_checked_ok
246
until this client is disabled
247
interval: datetime.timedelta(); How often to start a new checker
248
disable_hook: If set, called by disable() as disable_hook(self)
249
checker: subprocess.Popen(); a running checker process used
250
to see if the client lives.
251
'None' if no process is running.
168
secret: bytestring; sent verbatim (over TLS) to client
169
host: string; available for use by the checker command
170
created: datetime.datetime(); object creation, not client host
171
last_checked_ok: datetime.datetime() or None if not yet checked OK
172
timeout: datetime.timedelta(); How long from last_checked_ok
173
until this client is invalid
174
interval: datetime.timedelta(); How often to start a new checker
175
stop_hook: If set, called by stop() as stop_hook(self)
176
checker: subprocess.Popen(); a running checker process used
177
to see if the client lives.
178
'None' if no process is running.
252
179
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
180
stop_initiator_tag: - '' -
254
181
checker_callback_tag: - '' -
255
182
checker_command: string; External command which is run to check if
256
183
client lives. %() expansions are done at
257
184
runtime with vars(self) as dict, so that for
258
185
instance %(name)s can be used in the command.
259
current_checker_command: string; current running checker_command
187
_timeout: Real variable for 'timeout'
188
_interval: Real variable for 'interval'
189
_timeout_milliseconds: Used when calling gobject.timeout_add()
190
_interval_milliseconds: - '' -
263
def _timedelta_to_milliseconds(td):
264
"Convert a datetime.timedelta() to milliseconds"
265
return ((td.days * 24 * 60 * 60 * 1000)
266
+ (td.seconds * 1000)
267
+ (td.microseconds // 1000))
269
def timeout_milliseconds(self):
270
"Return the 'timeout' attribute in milliseconds"
271
return self._timedelta_to_milliseconds(self.timeout)
273
def interval_milliseconds(self):
274
"Return the 'interval' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.interval)
277
def __init__(self, name = None, disable_hook=None, config=None):
192
def _set_timeout(self, timeout):
193
"Setter function for 'timeout' attribute"
194
self._timeout = timeout
195
self._timeout_milliseconds = ((self.timeout.days
196
* 24 * 60 * 60 * 1000)
197
+ (self.timeout.seconds * 1000)
198
+ (self.timeout.microseconds
200
timeout = property(lambda self: self._timeout,
203
def _set_interval(self, interval):
204
"Setter function for 'interval' attribute"
205
self._interval = interval
206
self._interval_milliseconds = ((self.interval.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.interval.seconds
210
+ (self.interval.microseconds
212
interval = property(lambda self: self._interval,
215
def __init__(self, name = None, stop_hook=None, config={}):
278
216
"""Note: the 'checker' key in 'config' sets the
279
217
'checker_command' attribute and *not* the 'checker'
284
220
logger.debug(u"Creating client %r", self.name)
285
221
# Uppercase and remove spaces from fingerprint for later
286
222
# comparison purposes with return value from the fingerprint()
288
self.fingerprint = (config[u"fingerprint"].upper()
224
self.fingerprint = config["fingerprint"].upper()\
290
226
logger.debug(u" Fingerprint: %s", self.fingerprint)
291
if u"secret" in config:
292
self.secret = config[u"secret"].decode(u"base64")
293
elif u"secfile" in config:
294
with open(os.path.expanduser(os.path.expandvars
295
(config[u"secfile"])),
297
self.secret = secfile.read()
227
if "secret" in config:
228
self.secret = config["secret"].decode(u"base64")
229
elif "secfile" in config:
230
sf = open(config["secfile"])
231
self.secret = sf.read()
299
234
raise TypeError(u"No secret or secfile for client %s"
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
304
self.last_enabled = None
236
self.host = config.get("host", "")
237
self.created = datetime.datetime.now()
305
238
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
239
self.timeout = string_to_delta(config["timeout"])
240
self.interval = string_to_delta(config["interval"])
241
self.stop_hook = stop_hook
309
242
self.checker = None
310
243
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
244
self.stop_initiator_tag = None
312
245
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
246
self.check_command = config["checker"]
318
248
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
322
self.last_enabled = datetime.datetime.utcnow()
323
249
# Schedule a new checker to be started an 'interval' from now,
324
250
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
251
self.checker_initiator_tag = gobject.timeout_add\
252
(self._interval_milliseconds,
333
254
# Also start a new checker *right now*.
334
255
self.start_checker()
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
256
# Schedule a stop() when 'timeout' has passed
257
self.stop_initiator_tag = gobject.timeout_add\
258
(self._timeout_milliseconds,
262
The possibility that a client might be restarted is left open,
263
but not currently used."""
264
# If this client doesn't have a secret, it is already stopped.
265
if hasattr(self, "secret") and self.secret:
266
logger.info(u"Stopping client %s", self.name)
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
270
if getattr(self, "stop_initiator_tag", False):
271
gobject.source_remove(self.stop_initiator_tag)
272
self.stop_initiator_tag = None
273
if getattr(self, "checker_initiator_tag", False):
346
274
gobject.source_remove(self.checker_initiator_tag)
347
275
self.checker_initiator_tag = None
348
276
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
352
279
# Do not run this again if called by a gobject.timeout_add
355
281
def __del__(self):
356
self.disable_hook = None
359
def checker_callback(self, pid, condition, command):
282
self.stop_hook = None
284
def checker_callback(self, pid, condition):
360
285
"""The checker has completed, so take appropriate actions."""
286
now = datetime.datetime.now()
361
287
self.checker_callback_tag = None
362
288
self.checker = None
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
366
logger.info(u"Checker for %(name)s succeeded",
370
logger.info(u"Checker for %(name)s failed",
289
if os.WIFEXITED(condition) \
290
and (os.WEXITSTATUS(condition) == 0):
291
logger.info(u"Checker for %(name)s succeeded",
293
self.last_checked_ok = now
294
gobject.source_remove(self.stop_initiator_tag)
295
self.stop_initiator_tag = gobject.timeout_add\
296
(self._timeout_milliseconds,
298
elif not os.WIFEXITED(condition):
373
299
logger.warning(u"Checker for %(name)s crashed?",
376
def checked_ok(self):
377
"""Bump up the timeout for this client.
379
This should only be called when the client has been seen,
382
self.last_checked_ok = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
302
logger.info(u"Checker for %(name)s failed",
388
304
def start_checker(self):
389
305
"""Start a new checker subprocess if one is not running.
391
306
If a checker already exists, leave it running and do
393
308
# The reason for not killing a running checker is that if we
396
311
# client would inevitably timeout, since no checker would get
397
312
# a chance to run to completion. If we instead leave running
398
313
# checkers alone, the checker would have to take more time
399
# than 'timeout' for the client to be disabled, which is as it
402
# If a checker exists, make sure it is not a zombie
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
314
# than 'timeout' for the client to be declared invalid, which
315
# is as it should be.
416
316
if self.checker is None:
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
318
# In case check_command has exactly one % operator
319
command = self.check_command % self.host
420
320
except TypeError:
421
321
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
322
escaped_attrs = dict((key, re.escape(str(val)))
427
324
vars(self).iteritems())
429
command = self.checker_command % escaped_attrs
326
command = self.check_command % escaped_attrs
430
327
except TypeError, error:
431
328
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
329
u' %s', self.check_command, error)
433
330
return True # Try again later
434
self.current_checker_command = command
436
332
logger.info(u"Starting checker %r for %s",
437
333
command, self.name)
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
442
334
self.checker = subprocess.Popen(command,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
447
self.checker_callback,
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
337
self.checker_callback_tag = gobject.child_watch_add\
339
self.checker_callback)
340
except subprocess.OSError, error:
456
341
logger.error(u"Failed to start subprocess: %s",
458
343
# Re-run this periodically if run by gobject.timeout_add
461
345
def stop_checker(self):
462
346
"""Force the checker process, if any, to stop."""
463
347
if self.checker_callback_tag:
464
348
gobject.source_remove(self.checker_callback_tag)
465
349
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
350
if getattr(self, "checker", None) is None:
468
352
logger.debug(u"Stopping checker for %(name)s", vars(self))
470
354
os.kill(self.checker.pid, signal.SIGTERM)
472
356
#if self.checker.poll() is None:
473
357
# os.kill(self.checker.pid, signal.SIGKILL)
474
358
except OSError, error:
475
359
if error.errno != errno.ESRCH: # No such process
477
361
self.checker = None
480
def dbus_service_property(dbus_interface, signature=u"v",
481
access=u"readwrite", byte_arrays=False):
482
"""Decorators for marking methods of a DBusObjectWithProperties to
483
become properties on the D-Bus.
485
The decorated method will be called with no arguments by "Get"
486
and with one argument by "Set".
488
The parameters, where they are supported, are the same as
489
dbus.service.method, except there is only "signature", since the
490
type from Get() and the type sent to Set() is the same.
492
# Encoding deeply encoded byte arrays is not supported yet by the
493
# "Set" method, so we fail early here:
494
if byte_arrays and signature != u"ay":
495
raise ValueError(u"Byte arrays not supported for non-'ay'"
496
u" signature %r" % signature)
498
func._dbus_is_property = True
499
func._dbus_interface = dbus_interface
500
func._dbus_signature = signature
501
func._dbus_access = access
502
func._dbus_name = func.__name__
503
if func._dbus_name.endswith(u"_dbus_property"):
504
func._dbus_name = func._dbus_name[:-14]
505
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
510
class DBusPropertyException(dbus.exceptions.DBusException):
511
"""A base class for D-Bus property-related exceptions
513
def __unicode__(self):
514
return unicode(str(self))
517
class DBusPropertyAccessException(DBusPropertyException):
518
"""A property's access permissions disallows an operation.
523
class DBusPropertyNotFound(DBusPropertyException):
524
"""An attempt was made to access a non-existing property.
529
class DBusObjectWithProperties(dbus.service.Object):
530
"""A D-Bus object with properties.
532
Classes inheriting from this can use the dbus_service_property
533
decorator to expose methods as D-Bus properties. It exposes the
534
standard Get(), Set(), and GetAll() methods on the D-Bus.
538
def _is_dbus_property(obj):
539
return getattr(obj, u"_dbus_is_property", False)
541
def _get_all_dbus_properties(self):
542
"""Returns a generator of (name, attribute) pairs
544
return ((prop._dbus_name, prop)
546
inspect.getmembers(self, self._is_dbus_property))
548
def _get_dbus_property(self, interface_name, property_name):
549
"""Returns a bound method if one exists which is a D-Bus
550
property with the specified name and interface.
552
for name in (property_name,
553
property_name + u"_dbus_property"):
554
prop = getattr(self, name, None)
556
or not self._is_dbus_property(prop)
557
or prop._dbus_name != property_name
558
or (interface_name and prop._dbus_interface
559
and interface_name != prop._dbus_interface)):
563
raise DBusPropertyNotFound(self.dbus_object_path + u":"
564
+ interface_name + u"."
567
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
569
def Get(self, interface_name, property_name):
570
"""Standard D-Bus property Get() method, see D-Bus standard.
572
prop = self._get_dbus_property(interface_name, property_name)
573
if prop._dbus_access == u"write":
574
raise DBusPropertyAccessException(property_name)
576
if not hasattr(value, u"variant_level"):
578
return type(value)(value, variant_level=value.variant_level+1)
580
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
581
def Set(self, interface_name, property_name, value):
582
"""Standard D-Bus property Set() method, see D-Bus standard.
584
prop = self._get_dbus_property(interface_name, property_name)
585
if prop._dbus_access == u"read":
586
raise DBusPropertyAccessException(property_name)
587
if prop._dbus_get_args_options[u"byte_arrays"]:
588
# The byte_arrays option is not supported yet on
589
# signatures other than "ay".
590
if prop._dbus_signature != u"ay":
592
value = dbus.ByteArray(''.join(unichr(byte)
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
602
Note: Will not include properties with access="write".
605
for name, prop in self._get_all_dbus_properties():
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
614
if not hasattr(value, u"variant_level"):
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
631
document = xml.dom.minidom.parseString(xmlstring)
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
662
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
669
class ClientDBus(Client, DBusObjectWithProperties):
670
"""A Client class using D-Bus
673
dbus_object_path: dbus.ObjectPath
674
bus: dbus.SystemBus()
676
# dbus.service.Object doesn't use super(), so we can't either.
678
def __init__(self, bus = None, *args, **kwargs):
680
Client.__init__(self, *args, **kwargs)
681
# Only now, when this client is initialized, can it show up on
683
self.dbus_object_path = (dbus.ObjectPath
685
+ self.name.replace(u".", u"_")))
686
DBusObjectWithProperties.__init__(self, self.bus,
687
self.dbus_object_path)
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
708
def disable(self, quiet = False):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self, quiet=quiet)
711
if not quiet and oldstate != self.enabled:
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
717
def __del__(self, *args, **kwargs):
719
self.remove_from_connection()
722
if hasattr(DBusObjectWithProperties, u"__del__"):
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
Client.__del__(self, *args, **kwargs)
726
def checker_callback(self, pid, condition, command,
728
self.checker_callback_tag = None
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
if os.WIFEXITED(condition):
734
exitstatus = os.WEXITSTATUS(condition)
736
self.CheckerCompleted(dbus.Int16(exitstatus),
737
dbus.Int64(condition),
738
dbus.String(command))
741
self.CheckerCompleted(dbus.Int16(-1),
742
dbus.Int64(condition),
743
dbus.String(command))
745
return Client.checker_callback(self, pid, condition, command,
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
757
def start_checker(self, *args, **kwargs):
758
old_checker = self.checker
759
if self.checker is not None:
760
old_checker_pid = self.checker.pid
762
old_checker_pid = None
763
r = Client.start_checker(self, *args, **kwargs)
764
# Only if new checker process was started
765
if (self.checker is not None
766
and old_checker_pid != self.checker.pid):
768
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
783
## D-Bus methods, signals & properties
784
_interface = u"se.bsnet.fukt.Mandos.Client"
788
# CheckerCompleted - signal
789
@dbus.service.signal(_interface, signature=u"nxs")
790
def CheckerCompleted(self, exitcode, waitstatus, command):
794
# CheckerStarted - signal
795
@dbus.service.signal(_interface, signature=u"s")
796
def CheckerStarted(self, command):
800
# PropertyChanged - signal
801
@dbus.service.signal(_interface, signature=u"sv")
802
def PropertyChanged(self, property, value):
807
@dbus.service.signal(_interface)
813
@dbus.service.signal(_interface)
821
@dbus.service.method(_interface)
823
return self.checked_ok()
826
@dbus.service.method(_interface)
831
# StartChecker - method
832
@dbus.service.method(_interface)
833
def StartChecker(self):
838
@dbus.service.method(_interface)
843
# StopChecker - method
844
@dbus.service.method(_interface)
845
def StopChecker(self):
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def name_dbus_property(self):
853
return dbus.String(self.name)
855
# fingerprint - property
856
@dbus_service_property(_interface, signature=u"s", access=u"read")
857
def fingerprint_dbus_property(self):
858
return dbus.String(self.fingerprint)
861
@dbus_service_property(_interface, signature=u"s",
863
def host_dbus_property(self, value=None):
864
if value is None: # get
865
return dbus.String(self.host)
868
self.PropertyChanged(dbus.String(u"host"),
869
dbus.String(value, variant_level=1))
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def created_dbus_property(self):
874
return dbus.String(self._datetime_to_dbus(self.created))
876
# last_enabled - property
877
@dbus_service_property(_interface, signature=u"s", access=u"read")
878
def last_enabled_dbus_property(self):
879
if self.last_enabled is None:
880
return dbus.String(u"")
881
return dbus.String(self._datetime_to_dbus(self.last_enabled))
884
@dbus_service_property(_interface, signature=u"b",
886
def enabled_dbus_property(self, value=None):
887
if value is None: # get
888
return dbus.Boolean(self.enabled)
894
# last_checked_ok - property
895
@dbus_service_property(_interface, signature=u"s",
897
def last_checked_ok_dbus_property(self, value=None):
898
if value is not None:
362
def still_valid(self):
363
"""Has the timeout not yet passed for this client?"""
364
now = datetime.datetime.now()
901
365
if self.last_checked_ok is None:
902
return dbus.String(u"")
903
return dbus.String(self._datetime_to_dbus(self
907
@dbus_service_property(_interface, signature=u"t",
909
def timeout_dbus_property(self, value=None):
910
if value is None: # get
911
return dbus.UInt64(self.timeout_milliseconds())
912
self.timeout = datetime.timedelta(0, 0, 0, value)
914
self.PropertyChanged(dbus.String(u"timeout"),
915
dbus.UInt64(value, variant_level=1))
916
if getattr(self, u"disable_initiator_tag", None) is None:
919
gobject.source_remove(self.disable_initiator_tag)
920
self.disable_initiator_tag = None
922
_timedelta_to_milliseconds((self
928
# The timeout has passed
931
self.disable_initiator_tag = (gobject.timeout_add
932
(time_to_die, self.disable))
934
# interval - property
935
@dbus_service_property(_interface, signature=u"t",
937
def interval_dbus_property(self, value=None):
938
if value is None: # get
939
return dbus.UInt64(self.interval_milliseconds())
940
self.interval = datetime.timedelta(0, 0, 0, value)
942
self.PropertyChanged(dbus.String(u"interval"),
943
dbus.UInt64(value, variant_level=1))
944
if getattr(self, u"checker_initiator_tag", None) is None:
946
# Reschedule checker run
947
gobject.source_remove(self.checker_initiator_tag)
948
self.checker_initiator_tag = (gobject.timeout_add
949
(value, self.start_checker))
950
self.start_checker() # Start one now, too
953
@dbus_service_property(_interface, signature=u"s",
955
def checker_dbus_property(self, value=None):
956
if value is None: # get
957
return dbus.String(self.checker_command)
958
self.checker_command = value
960
self.PropertyChanged(dbus.String(u"checker"),
961
dbus.String(self.checker_command,
964
# checker_running - property
965
@dbus_service_property(_interface, signature=u"b",
967
def checker_running_dbus_property(self, value=None):
968
if value is None: # get
969
return dbus.Boolean(self.checker is not None)
975
# object_path - property
976
@dbus_service_property(_interface, signature=u"o", access=u"read")
977
def object_path_dbus_property(self):
978
return self.dbus_object_path # is already a dbus.ObjectPath
981
@dbus_service_property(_interface, signature=u"ay",
982
access=u"write", byte_arrays=True)
983
def secret_dbus_property(self, value):
984
self.secret = str(value)
989
class ClientHandler(socketserver.BaseRequestHandler, object):
990
"""A class to handle client connections.
992
Instantiated once for each connection to handle it.
366
return now < (self.created + self.timeout)
368
return now < (self.last_checked_ok + self.timeout)
371
def peer_certificate(session):
372
"Return the peer's OpenPGP certificate as a bytestring"
373
# If not an OpenPGP certificate...
374
if gnutls.library.functions.gnutls_certificate_type_get\
375
(session._c_object) \
376
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
377
# ...do the normal thing
378
return session.peer_certificate
379
list_size = ctypes.c_uint()
380
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
381
(session._c_object, ctypes.byref(list_size))
382
if list_size.value == 0:
385
return ctypes.string_at(cert.data, cert.size)
388
def fingerprint(openpgp):
389
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
390
# New GnuTLS "datum" with the OpenPGP public key
391
datum = gnutls.library.types.gnutls_datum_t\
392
(ctypes.cast(ctypes.c_char_p(openpgp),
393
ctypes.POINTER(ctypes.c_ubyte)),
394
ctypes.c_uint(len(openpgp)))
395
# New empty GnuTLS certificate
396
crt = gnutls.library.types.gnutls_openpgp_crt_t()
397
gnutls.library.functions.gnutls_openpgp_crt_init\
399
# Import the OpenPGP public key into the certificate
400
gnutls.library.functions.gnutls_openpgp_crt_import\
401
(crt, ctypes.byref(datum),
402
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
403
# New buffer for the fingerprint
404
buffer = ctypes.create_string_buffer(20)
405
buffer_length = ctypes.c_size_t()
406
# Get the fingerprint from the certificate into the buffer
407
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
408
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
409
# Deinit the certificate
410
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
411
# Convert the buffer to a Python bytestring
412
fpr = ctypes.string_at(buffer, buffer_length.value)
413
# Convert the bytestring to hexadecimal notation
414
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
418
class tcp_handler(SocketServer.BaseRequestHandler, object):
419
"""A TCP request handler class.
420
Instantiated by IPv6_TCPServer for each request to handle it.
993
421
Note: This will run in its own forked process."""
995
423
def handle(self):
996
424
logger.info(u"TCP connection from: %s",
997
unicode(self.client_address))
998
logger.debug(u"IPC Pipe FD: %d",
999
self.server.child_pipe[1].fileno())
1000
# Open IPC pipe to parent process
1001
with contextlib.nested(self.server.child_pipe[1],
1002
self.server.parent_pipe[0]
1003
) as (ipc, ipc_return):
1004
session = (gnutls.connection
1005
.ClientSession(self.request,
1007
.X509Credentials()))
1009
line = self.request.makefile().readline()
1010
logger.debug(u"Protocol version: %r", line)
1012
if int(line.strip().split()[0]) > 1:
1014
except (ValueError, IndexError, RuntimeError), error:
1015
logger.error(u"Unknown protocol version: %s", error)
1018
# Note: gnutls.connection.X509Credentials is really a
1019
# generic GnuTLS certificate credentials object so long as
1020
# no X.509 keys are added to it. Therefore, we can use it
1021
# here despite using OpenPGP certificates.
1023
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1024
# u"+AES-256-CBC", u"+SHA1",
1025
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1027
# Use a fallback default, since this MUST be set.
1028
priority = self.server.gnutls_priority
1029
if priority is None:
1030
priority = u"NORMAL"
1031
(gnutls.library.functions
1032
.gnutls_priority_set_direct(session._c_object,
1037
except gnutls.errors.GNUTLSError, error:
1038
logger.warning(u"Handshake failed: %s", error)
1039
# Do not run session.bye() here: the session is not
1040
# established. Just abandon the request.
1042
logger.debug(u"Handshake succeeded")
1045
fpr = self.fingerprint(self.peer_certificate
1047
except (TypeError, gnutls.errors.GNUTLSError), error:
1048
logger.warning(u"Bad certificate: %s", error)
1050
logger.debug(u"Fingerprint: %s", fpr)
1052
for c in self.server.clients:
1053
if c.fingerprint == fpr:
1057
ipc.write(u"NOTFOUND %s %s\n"
1058
% (fpr, unicode(self.client_address)))
1060
# Have to check if client.enabled, since it is
1061
# possible that the client was disabled since the
1062
# GnuTLS session was established.
1063
ipc.write(u"GETATTR enabled %s\n" % fpr)
1064
enabled = pickle.load(ipc_return)
1066
ipc.write(u"DISABLED %s\n" % client.name)
1068
ipc.write(u"SENDING %s\n" % client.name)
1070
while sent_size < len(client.secret):
1071
sent = session.send(client.secret[sent_size:])
1072
logger.debug(u"Sent: %d, remaining: %d",
1073
sent, len(client.secret)
1074
- (sent_size + sent))
1080
def peer_certificate(session):
1081
"Return the peer's OpenPGP certificate as a bytestring"
1082
# If not an OpenPGP certificate...
1083
if (gnutls.library.functions
1084
.gnutls_certificate_type_get(session._c_object)
1085
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1086
# ...do the normal thing
1087
return session.peer_certificate
1088
list_size = ctypes.c_uint(1)
1089
cert_list = (gnutls.library.functions
1090
.gnutls_certificate_get_peers
1091
(session._c_object, ctypes.byref(list_size)))
1092
if not bool(cert_list) and list_size.value != 0:
1093
raise gnutls.errors.GNUTLSError(u"error getting peer"
1095
if list_size.value == 0:
1098
return ctypes.string_at(cert.data, cert.size)
1101
def fingerprint(openpgp):
1102
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1103
# New GnuTLS "datum" with the OpenPGP public key
1104
datum = (gnutls.library.types
1105
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1108
ctypes.c_uint(len(openpgp))))
1109
# New empty GnuTLS certificate
1110
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1111
(gnutls.library.functions
1112
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1113
# Import the OpenPGP public key into the certificate
1114
(gnutls.library.functions
1115
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1116
gnutls.library.constants
1117
.GNUTLS_OPENPGP_FMT_RAW))
1118
# Verify the self signature in the key
1119
crtverify = ctypes.c_uint()
1120
(gnutls.library.functions
1121
.gnutls_openpgp_crt_verify_self(crt, 0,
1122
ctypes.byref(crtverify)))
1123
if crtverify.value != 0:
1124
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1125
raise (gnutls.errors.CertificateSecurityError
1127
# New buffer for the fingerprint
1128
buf = ctypes.create_string_buffer(20)
1129
buf_len = ctypes.c_size_t()
1130
# Get the fingerprint from the certificate into the buffer
1131
(gnutls.library.functions
1132
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1133
ctypes.byref(buf_len)))
1134
# Deinit the certificate
1135
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1136
# Convert the buffer to a Python bytestring
1137
fpr = ctypes.string_at(buf, buf_len.value)
1138
# Convert the bytestring to hexadecimal notation
1139
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1143
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1144
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1145
def process_request(self, request, client_address):
1146
"""Overrides and wraps the original process_request().
1148
This function creates a new pipe in self.pipe
1150
# Child writes to child_pipe
1151
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1152
# Parent writes to parent_pipe
1153
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1154
super(ForkingMixInWithPipes,
1155
self).process_request(request, client_address)
1156
# Close unused ends for parent
1157
self.parent_pipe[0].close() # close read end
1158
self.child_pipe[1].close() # close write end
1159
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1160
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1161
"""Dummy function; override as necessary"""
1162
child_pipe_fd.close()
1163
parent_pipe_fd.close()
1166
class IPv6_TCPServer(ForkingMixInWithPipes,
1167
socketserver.TCPServer, object):
1168
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
425
unicode(self.client_address))
426
session = gnutls.connection.ClientSession\
427
(self.request, gnutls.connection.X509Credentials())
429
line = self.request.makefile().readline()
430
logger.debug(u"Protocol version: %r", line)
432
if int(line.strip().split()[0]) > 1:
434
except (ValueError, IndexError, RuntimeError), error:
435
logger.error(u"Unknown protocol version: %s", error)
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
443
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
446
priority = "NORMAL" # Fallback default, since this
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
450
gnutls.library.functions.gnutls_priority_set_direct\
451
(session._c_object, priority, None);
455
except gnutls.errors.GNUTLSError, error:
456
logger.warning(u"Handshake failed: %s", error)
457
# Do not run session.bye() here: the session is not
458
# established. Just abandon the request.
461
fpr = fingerprint(peer_certificate(session))
462
except (TypeError, gnutls.errors.GNUTLSError), error:
463
logger.warning(u"Bad certificate: %s", error)
466
logger.debug(u"Fingerprint: %s", fpr)
468
for c in self.server.clients:
469
if c.fingerprint == fpr:
473
logger.warning(u"Client not found for fingerprint: %s",
477
# Have to check if client.still_valid(), since it is possible
478
# that the client timed out while establishing the GnuTLS
480
if not client.still_valid():
481
logger.warning(u"Client %(name)s is invalid",
486
while sent_size < len(client.secret):
487
sent = session.send(client.secret[sent_size:])
488
logger.debug(u"Sent: %d, remaining: %d",
489
sent, len(client.secret)
490
- (sent_size + sent))
495
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
496
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1171
enabled: Boolean; whether this server is activated yet
1172
interface: None or a network interface name (string)
1173
use_ipv6: Boolean; to use IPv6 or not
498
settings: Server settings
499
clients: Set() of Client objects
1175
def __init__(self, server_address, RequestHandlerClass,
1176
interface=None, use_ipv6=True):
1177
self.interface = interface
1179
self.address_family = socket.AF_INET6
1180
socketserver.TCPServer.__init__(self, server_address,
1181
RequestHandlerClass)
501
address_family = socket.AF_INET6
502
def __init__(self, *args, **kwargs):
503
if "settings" in kwargs:
504
self.settings = kwargs["settings"]
505
del kwargs["settings"]
506
if "clients" in kwargs:
507
self.clients = kwargs["clients"]
508
del kwargs["clients"]
509
return super(type(self), self).__init__(*args, **kwargs)
1182
510
def server_bind(self):
1183
511
"""This overrides the normal server_bind() function
1184
512
to bind to an interface if one was specified, and also NOT to
1185
513
bind to an address or port if they were not specified."""
1186
if self.interface is not None:
1187
if SO_BINDTODEVICE is None:
1188
logger.error(u"SO_BINDTODEVICE does not exist;"
1189
u" cannot bind to interface %s",
1193
self.socket.setsockopt(socket.SOL_SOCKET,
1197
except socket.error, error:
1198
if error[0] == errno.EPERM:
1199
logger.error(u"No permission to"
1200
u" bind to interface %s",
1202
elif error[0] == errno.ENOPROTOOPT:
1203
logger.error(u"SO_BINDTODEVICE not available;"
1204
u" cannot bind to interface %s",
514
if self.settings["interface"]:
515
# 25 is from /usr/include/asm-i486/socket.h
516
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
518
self.socket.setsockopt(socket.SOL_SOCKET,
520
self.settings["interface"])
521
except socket.error, error:
522
if error[0] == errno.EPERM:
523
logger.error(u"No permission to"
524
u" bind to interface %s",
525
self.settings["interface"])
1208
528
# Only bind(2) the socket if we really need to.
1209
529
if self.server_address[0] or self.server_address[1]:
1210
530
if not self.server_address[0]:
1211
if self.address_family == socket.AF_INET6:
1212
any_address = u"::" # in6addr_any
1214
any_address = socket.INADDR_ANY
1215
self.server_address = (any_address,
532
self.server_address = (in6addr_any,
1216
533
self.server_address[1])
1217
534
elif not self.server_address[1]:
1218
535
self.server_address = (self.server_address[0],
1220
# if self.interface:
537
# if self.settings["interface"]:
1221
538
# self.server_address = (self.server_address[0],
1224
541
# if_nametoindex
1226
return socketserver.TCPServer.server_bind(self)
1229
class MandosServer(IPv6_TCPServer):
1233
clients: set of Client objects
1234
gnutls_priority GnuTLS priority string
1235
use_dbus: Boolean; to emit D-Bus signals or not
1237
Assumes a gobject.MainLoop event loop.
1239
def __init__(self, server_address, RequestHandlerClass,
1240
interface=None, use_ipv6=True, clients=None,
1241
gnutls_priority=None, use_dbus=True):
1242
self.enabled = False
1243
self.clients = clients
1244
if self.clients is None:
1245
self.clients = set()
1246
self.use_dbus = use_dbus
1247
self.gnutls_priority = gnutls_priority
1248
IPv6_TCPServer.__init__(self, server_address,
1249
RequestHandlerClass,
1250
interface = interface,
1251
use_ipv6 = use_ipv6)
1252
def server_activate(self):
1254
return socketserver.TCPServer.server_activate(self)
1257
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1258
# Call "handle_ipc" for both data and EOF events
1259
gobject.io_add_watch(child_pipe_fd.fileno(),
1260
gobject.IO_IN | gobject.IO_HUP,
1261
functools.partial(self.handle_ipc,
1262
reply = parent_pipe_fd,
1263
sender= child_pipe_fd))
1264
def handle_ipc(self, source, condition, reply=None, sender=None):
1266
gobject.IO_IN: u"IN", # There is data to read.
1267
gobject.IO_OUT: u"OUT", # Data can be written (without
1269
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1270
gobject.IO_ERR: u"ERR", # Error condition.
1271
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1272
# broken, usually for pipes and
1275
conditions_string = ' | '.join(name
1277
condition_names.iteritems()
1278
if cond & condition)
1279
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1282
# Read a line from the file object
1283
cmdline = sender.readline()
1284
if not cmdline: # Empty line means end of file
1285
# close the IPC pipes
1289
# Stop calling this function
1292
logger.debug(u"IPC command: %r", cmdline)
1294
# Parse and act on command
1295
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1297
if cmd == u"NOTFOUND":
1298
fpr, address = args.split(None, 1)
1299
logger.warning(u"Client not found for fingerprint: %s, ad"
1300
u"dress: %s", fpr, address)
1303
mandos_dbus_service.ClientNotFound(fpr, address)
1304
elif cmd == u"DISABLED":
1305
for client in self.clients:
1306
if client.name == args:
1307
logger.warning(u"Client %s is disabled", args)
1313
logger.error(u"Unknown client %s is disabled", args)
1314
elif cmd == u"SENDING":
1315
for client in self.clients:
1316
if client.name == args:
1317
logger.info(u"Sending secret to %s", client.name)
1324
logger.error(u"Sending secret to unknown client %s",
1326
elif cmd == u"GETATTR":
1327
attr_name, fpr = args.split(None, 1)
1328
for client in self.clients:
1329
if client.fingerprint == fpr:
1330
attr_value = getattr(client, attr_name, None)
1331
logger.debug("IPC reply: %r", attr_value)
1332
pickle.dump(attr_value, reply)
1335
logger.error(u"Client %s on address %s requesting "
1336
u"attribute %s not found", fpr, address,
1338
pickle.dump(None, reply)
1340
logger.error(u"Unknown IPC command: %r", cmdline)
1342
# Keep calling this function
544
return super(type(self), self).server_bind()
1346
547
def string_to_delta(interval):
1347
548
"""Parse a string and return a datetime.timedelta
1349
>>> string_to_delta(u'7d')
550
>>> string_to_delta('7d')
1350
551
datetime.timedelta(7)
1351
>>> string_to_delta(u'60s')
552
>>> string_to_delta('60s')
1352
553
datetime.timedelta(0, 60)
1353
>>> string_to_delta(u'60m')
554
>>> string_to_delta('60m')
1354
555
datetime.timedelta(0, 3600)
1355
>>> string_to_delta(u'24h')
556
>>> string_to_delta('24h')
1356
557
datetime.timedelta(1)
1357
558
>>> string_to_delta(u'1w')
1358
559
datetime.timedelta(7)
1359
>>> string_to_delta(u'5m 30s')
1360
datetime.timedelta(0, 330)
1362
timevalue = datetime.timedelta(0)
1363
for s in interval.split():
1365
suffix = unicode(s[-1])
1368
delta = datetime.timedelta(value)
1369
elif suffix == u"s":
1370
delta = datetime.timedelta(0, value)
1371
elif suffix == u"m":
1372
delta = datetime.timedelta(0, 0, 0, 0, value)
1373
elif suffix == u"h":
1374
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1375
elif suffix == u"w":
1376
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1378
raise ValueError(u"Unknown suffix %r" % suffix)
1379
except (ValueError, IndexError), e:
1380
raise ValueError(e.message)
562
suffix=unicode(interval[-1])
563
value=int(interval[:-1])
565
delta = datetime.timedelta(value)
567
delta = datetime.timedelta(0, value)
569
delta = datetime.timedelta(0, 0, 0, 0, value)
571
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
576
except (ValueError, IndexError):
581
def server_state_changed(state):
582
"""Derived from the Avahi example code"""
583
if state == avahi.SERVER_COLLISION:
584
logger.error(u"Server name collision")
586
elif state == avahi.SERVER_RUNNING:
590
def entry_group_state_changed(state, error):
591
"""Derived from the Avahi example code"""
592
logger.debug(u"state change: %i", state)
594
if state == avahi.ENTRY_GROUP_ESTABLISHED:
595
logger.debug(u"Service established.")
596
elif state == avahi.ENTRY_GROUP_COLLISION:
597
logger.warning(u"Service name collision.")
599
elif state == avahi.ENTRY_GROUP_FAILURE:
600
logger.critical(u"Error in group state changed %s",
602
raise AvahiGroupError("State changed: %s", str(error))
1385
604
def if_nametoindex(interface):
1386
"""Call the C function if_nametoindex(), or equivalent
1388
Note: This function cannot accept a unicode string."""
605
"""Call the C function if_nametoindex(), or equivalent"""
1389
606
global if_nametoindex
1391
if_nametoindex = (ctypes.cdll.LoadLibrary
1392
(ctypes.util.find_library(u"c"))
608
if "ctypes.util" not in sys.modules:
610
if_nametoindex = ctypes.cdll.LoadLibrary\
611
(ctypes.util.find_library("c")).if_nametoindex
1394
612
except (OSError, AttributeError):
1395
logger.warning(u"Doing if_nametoindex the hard way")
613
if "struct" not in sys.modules:
615
if "fcntl" not in sys.modules:
1396
617
def if_nametoindex(interface):
1397
618
"Get an interface index the hard way, i.e. using fcntl()"
1398
619
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1399
with contextlib.closing(socket.socket()) as s:
1400
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1401
struct.pack(str(u"16s16x"),
1403
interface_index = struct.unpack(str(u"I"),
621
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
622
struct.pack("16s16x", interface))
624
interface_index = struct.unpack("I", ifreq[16:20])[0]
1405
625
return interface_index
1406
626
return if_nametoindex(interface)
1409
629
def daemon(nochdir = False, noclose = False):
1410
630
"""See daemon(3). Standard BSD Unix function.
1412
631
This should really exist as os.daemon, but it doesn't (yet)."""
1471
683
# Default values for config file for server-global settings
1472
server_defaults = { u"interface": u"",
1477
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1478
u"servicename": u"Mandos",
1479
u"use_dbus": u"True",
1480
u"use_ipv6": u"True",
684
server_defaults = { "interface": "",
689
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
690
"servicename": "Mandos",
1483
693
# Parse config file for server-global settings
1484
server_config = configparser.SafeConfigParser(server_defaults)
694
server_config = ConfigParser.SafeConfigParser(server_defaults)
1485
695
del server_defaults
1486
server_config.read(os.path.join(options.configdir,
696
server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
server_section = "server"
1488
698
# Convert the SafeConfigParser object to a dict
1489
server_settings = server_config.defaults()
1490
# Use the appropriate methods on the non-string config options
1491
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1492
server_settings[option] = server_config.getboolean(u"DEFAULT",
1494
if server_settings["port"]:
1495
server_settings["port"] = server_config.getint(u"DEFAULT",
699
server_settings = dict(server_config.items(server_section))
700
# Use getboolean on the boolean config option
701
server_settings["debug"] = server_config.getboolean\
702
(server_section, "debug")
1497
703
del server_config
1499
705
# Override the settings from the config file with command line
1500
706
# options, if set.
1501
for option in (u"interface", u"address", u"port", u"debug",
1502
u"priority", u"servicename", u"configdir",
1503
u"use_dbus", u"use_ipv6"):
707
for option in ("interface", "address", "port", "debug",
708
"priority", "servicename", "configdir"):
1504
709
value = getattr(options, option)
1505
710
if value is not None:
1506
711
server_settings[option] = value
1508
# Force all strings to be unicode
1509
for option in server_settings.keys():
1510
if type(server_settings[option]) is str:
1511
server_settings[option] = unicode(server_settings[option])
1512
713
# Now we have our good server settings in "server_settings"
1514
##################################################################
1517
debug = server_settings[u"debug"]
1518
use_dbus = server_settings[u"use_dbus"]
1519
use_ipv6 = server_settings[u"use_ipv6"]
715
debug = server_settings["debug"]
1522
718
syslogger.setLevel(logging.WARNING)
1523
console.setLevel(logging.WARNING)
1525
if server_settings[u"servicename"] != u"Mandos":
1526
syslogger.setFormatter(logging.Formatter
1527
(u'Mandos (%s) [%%(process)d]:'
1528
u' %%(levelname)s: %%(message)s'
1529
% server_settings[u"servicename"]))
720
if server_settings["servicename"] != "Mandos":
721
syslogger.setFormatter(logging.Formatter\
722
('Mandos (%s): %%(levelname)s:'
724
% server_settings["servicename"]))
1531
726
# Parse config file with clients
1532
client_defaults = { u"timeout": u"1h",
1534
u"checker": u"fping -q -- %%(host)s",
727
client_defaults = { "timeout": "1h",
729
"checker": "fping -q -- %%(host)s",
1537
client_config = configparser.SafeConfigParser(client_defaults)
1538
client_config.read(os.path.join(server_settings[u"configdir"],
1541
global mandos_dbus_service
1542
mandos_dbus_service = None
1544
tcp_server = MandosServer((server_settings[u"address"],
1545
server_settings[u"port"]),
1547
interface=server_settings[u"interface"],
1550
server_settings[u"priority"],
1552
pidfilename = u"/var/run/mandos.pid"
1554
pidfile = open(pidfilename, u"w")
1556
logger.error(u"Could not open file %r", pidfilename)
1559
uid = pwd.getpwnam(u"_mandos").pw_uid
1560
gid = pwd.getpwnam(u"_mandos").pw_gid
1563
uid = pwd.getpwnam(u"mandos").pw_uid
1564
gid = pwd.getpwnam(u"mandos").pw_gid
1567
uid = pwd.getpwnam(u"nobody").pw_uid
1568
gid = pwd.getpwnam(u"nobody").pw_gid
1575
except OSError, error:
1576
if error[0] != errno.EPERM:
1579
# Enable all possible GnuTLS debugging
1581
# "Use a log level over 10 to enable all debugging options."
1583
gnutls.library.functions.gnutls_global_set_log_level(11)
1585
@gnutls.library.types.gnutls_log_func
1586
def debug_gnutls(level, string):
1587
logger.debug(u"GnuTLS: %s", string[:-1])
1589
(gnutls.library.functions
1590
.gnutls_global_set_log_function(debug_gnutls))
731
client_config = ConfigParser.SafeConfigParser(client_defaults)
732
client_config.read(os.path.join(server_settings["configdir"],
736
service = AvahiService(name = server_settings["servicename"],
737
type = "_mandos._tcp", );
738
if server_settings["interface"]:
739
service.interface = if_nametoindex(server_settings["interface"])
1592
741
global main_loop
1593
744
# From the Avahi example code
1594
745
DBusGMainLoop(set_as_default=True )
1595
746
main_loop = gobject.MainLoop()
1596
747
bus = dbus.SystemBus()
748
server = dbus.Interface(
749
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
750
avahi.DBUS_INTERFACE_SERVER )
1597
751
# End of Avahi example code
1600
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1601
bus, do_not_queue=True)
1602
except dbus.exceptions.NameExistsException, e:
1603
logger.error(unicode(e) + u", disabling D-Bus")
1605
server_settings[u"use_dbus"] = False
1606
tcp_server.use_dbus = False
1607
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1608
service = AvahiService(name = server_settings[u"servicename"],
1609
servicetype = u"_mandos._tcp",
1610
protocol = protocol, bus = bus)
1611
if server_settings["interface"]:
1612
service.interface = (if_nametoindex
1613
(str(server_settings[u"interface"])))
1615
client_class = Client
1617
client_class = functools.partial(ClientDBus, bus = bus)
1618
tcp_server.clients.update(set(
1619
client_class(name = section,
1620
config= dict(client_config.items(section)))
1621
for section in client_config.sections()))
1622
if not tcp_server.clients:
1623
logger.warning(u"No clients defined")
1626
# Redirect stdin so all checkers get /dev/null
1627
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1628
os.dup2(null, sys.stdin.fileno())
1632
# No console logging
1633
logger.removeHandler(console)
1634
# Close all input and output, do double fork, etc.
754
console = logging.StreamHandler()
755
# console.setLevel(logging.DEBUG)
756
console.setFormatter(logging.Formatter\
757
('%(levelname)s: %(message)s'))
758
logger.addHandler(console)
762
def remove_from_clients(client):
763
clients.remove(client)
765
logger.critical(u"No clients left, exiting")
768
clients.update(Set(Client(name = section,
769
stop_hook = remove_from_clients,
771
= dict(client_config.items(section)))
772
for section in client_config.sections()))
774
logger.critical(u"No clients defined")
780
pidfilename = "/var/run/mandos/mandos.pid"
1640
pidfile.write(str(pid) + "\n")
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
1643
logger.error(u"Could not write to file %r with PID %d",
1646
# "pidfile" was never created
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
792
"Cleanup function; run on exit"
794
# From the Avahi example code
795
if not group is None:
798
# End of Avahi example code
801
client = clients.pop()
802
client.stop_hook = None
805
atexit.register(cleanup)
1651
808
signal.signal(signal.SIGINT, signal.SIG_IGN)
1652
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1653
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1656
class MandosDBusService(dbus.service.Object):
1657
"""A D-Bus proxy object"""
1659
dbus.service.Object.__init__(self, bus, u"/")
1660
_interface = u"se.bsnet.fukt.Mandos"
1662
@dbus.service.signal(_interface, signature=u"o")
1663
def ClientAdded(self, objpath):
1667
@dbus.service.signal(_interface, signature=u"ss")
1668
def ClientNotFound(self, fingerprint, address):
1672
@dbus.service.signal(_interface, signature=u"os")
1673
def ClientRemoved(self, objpath, name):
1677
@dbus.service.method(_interface, out_signature=u"ao")
1678
def GetAllClients(self):
1680
return dbus.Array(c.dbus_object_path
1681
for c in tcp_server.clients)
1683
@dbus.service.method(_interface,
1684
out_signature=u"a{oa{sv}}")
1685
def GetAllClientsWithProperties(self):
1687
return dbus.Dictionary(
1688
((c.dbus_object_path, c.GetAll(u""))
1689
for c in tcp_server.clients),
1690
signature=u"oa{sv}")
1692
@dbus.service.method(_interface, in_signature=u"o")
1693
def RemoveClient(self, object_path):
1695
for c in tcp_server.clients:
1696
if c.dbus_object_path == object_path:
1697
tcp_server.clients.remove(c)
1698
c.remove_from_connection()
1699
# Don't signal anything except ClientRemoved
1700
c.disable(quiet=True)
1702
self.ClientRemoved(object_path, c.name)
1704
raise KeyError(object_path)
1708
mandos_dbus_service = MandosDBusService()
1711
"Cleanup function; run on exit"
1714
while tcp_server.clients:
1715
client = tcp_server.clients.pop()
1717
client.remove_from_connection()
1718
client.disable_hook = None
1719
# Don't signal anything except ClientRemoved
1720
client.disable(quiet=True)
1723
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1726
atexit.register(cleanup)
1728
for client in tcp_server.clients:
1731
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1735
tcp_server.server_activate()
812
for client in clients:
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
818
settings=server_settings,
1737
820
# Find out what port we got
1738
821
service.port = tcp_server.socket.getsockname()[1]
1740
logger.info(u"Now listening on address %r, port %d,"
1741
" flowinfo %d, scope_id %d"
1742
% tcp_server.socket.getsockname())
1744
logger.info(u"Now listening on address %r, port %d"
1745
% tcp_server.socket.getsockname())
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
1747
825
#service.interface = tcp_server.socket.getsockname()[3]
1750
828
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
831
server_state_changed(server.GetState())
1753
832
except dbus.exceptions.DBusException, error:
1754
833
logger.critical(u"DBusException: %s", error)
1757
835
# End of Avahi example code
1759
837
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1760
838
lambda *args, **kwargs:
1761
(tcp_server.handle_request
1762
(*args[2:], **kwargs) or True))
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
1764
842
logger.debug(u"Starting main loop")
843
main_loop_started = True
1766
845
except AvahiError, error:
1767
logger.critical(u"AvahiError: %s", error)
846
logger.critical(u"AvahiError: %s" + unicode(error))
1770
848
except KeyboardInterrupt:
1773
logger.debug(u"Server received KeyboardInterrupt")
1774
logger.debug(u"Server exiting")
1775
# Must run before the D-Bus bus name gets deregistered
1778
852
if __name__ == '__main__':