110
131
max_renames: integer; maximum number of renames
111
132
rename_count: integer; counter so we only rename after collisions
112
133
a sensible number of times
134
group: D-Bus Entry Group
136
bus: dbus.SystemBus()
114
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
117
142
self.interface = interface
144
self.type = servicetype
146
self.TXT = TXT if TXT is not None else []
125
147
self.domain = domain
127
149
self.rename_count = 0
150
self.max_renames = max_renames
151
self.protocol = protocol
152
self.group = None # our entry group
155
self.entry_group_state_changed_match = None
128
156
def rename(self):
129
157
"""Derived from the Avahi example code"""
130
158
if self.rename_count >= self.max_renames:
131
logger.critical(u"No suitable service name found after %i"
132
u" retries, exiting.", rename_count)
159
logger.critical("No suitable Zeroconf service name found"
160
" after %i retries, exiting.",
133
162
raise AvahiServiceError("Too many renames")
134
name = server.GetAlternativeServiceName(name)
135
logger.error(u"Changing name to %r ...", name)
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
165
logger.info("Changing Zeroconf service name to %r ...",
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
174
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
138
178
self.rename_count += 1
139
179
def remove(self):
140
180
"""Derived from the Avahi example code"""
141
if group is not None:
181
if self.entry_group_state_changed_match is not None:
182
self.entry_group_state_changed_match.remove()
183
self.entry_group_state_changed_match = None
184
if self.group is not None:
144
187
"""Derived from the Avahi example code"""
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
189
if self.group is None:
190
self.group = dbus.Interface(
191
self.bus.get_object(avahi.DBUS_NAME,
192
self.server.EntryGroupNew()),
193
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
self.entry_group_state_changed_match = (
195
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
197
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
self.name, self.type)
199
self.group.AddService(
202
dbus.UInt32(0), # flags
203
self.name, self.type,
204
self.domain, self.host,
205
dbus.UInt16(self.port),
206
avahi.string_array_to_txt_array(self.TXT))
208
def entry_group_state_changed(self, state, error):
209
"""Derived from the Avahi example code"""
210
logger.debug("Avahi entry group state change: %i", state)
212
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
logger.debug("Zeroconf service established.")
214
elif state == avahi.ENTRY_GROUP_COLLISION:
215
logger.info("Zeroconf service name collision.")
217
elif state == avahi.ENTRY_GROUP_FAILURE:
218
logger.critical("Avahi: Error in group state changed %s",
220
raise AvahiGroupError("State changed: %s"
223
"""Derived from the Avahi example code"""
224
if self.group is not None:
227
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
232
def server_state_changed(self, state, error=None):
233
"""Derived from the Avahi example code"""
234
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
242
if state in bad_states:
243
if bad_states[state] is not None:
245
logger.error(bad_states[state])
247
logger.error(bad_states[state] + ": %r", error)
249
elif state == avahi.SERVER_RUNNING:
253
logger.debug("Unknown state: %r", state)
255
logger.debug("Unknown state: %r: %r", state, error)
257
"""Derived from the Avahi example code"""
258
if self.server is None:
259
self.server = dbus.Interface(
260
self.bus.get_object(avahi.DBUS_NAME,
261
avahi.DBUS_PATH_SERVER,
262
follow_name_owner_changes=True),
263
avahi.DBUS_INTERFACE_SERVER)
264
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
266
self.server_state_changed(self.server.GetState())
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
170
275
class Client(object):
171
276
"""A representation of a client host served by this server.
173
name: string; from the config file, used in log messages
279
_approved: bool(); 'None' if not yet approved/disapproved
280
approval_delay: datetime.timedelta(); Time to wait for approval
281
approval_duration: datetime.timedelta(); Duration of one approval
282
checker: subprocess.Popen(); a running checker process used
283
to see if the client lives.
284
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
286
checker_command: string; External command which is run to check
287
if client lives. %() expansions are done at
288
runtime with vars(self) as dict, so that for
289
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
291
created: datetime.datetime(); (UTC) object creation
292
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
174
296
fingerprint: string (40 or 32 hexadecimal digits); used to
175
297
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
192
runtime with vars(self) as dict, so that for
193
instance %(name)s can be used in the command.
195
_timeout: Real variable for 'timeout'
196
_interval: Real variable for 'interval'
197
_timeout_milliseconds: Used when calling gobject.timeout_add()
198
_interval_milliseconds: - '' -
298
host: string; available for use by the checker command
299
interval: datetime.timedelta(); How often to start a new checker
300
last_approval_request: datetime.datetime(); (UTC) or None
301
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
303
name: string; from the config file, used in log messages and
305
secret: bytestring; sent verbatim (over TLS) to client
306
timeout: datetime.timedelta(); How long from last_checked_ok
307
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
309
runtime_expansions: Allowed attributes for runtime expansion.
310
expires: datetime.datetime(); time (UTC) when a client will be
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={}):
314
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
317
"last_enabled", "name", "timeout")
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
334
def __init__(self, name = None, disable_hook=None, config=None):
224
335
"""Note: the 'checker' key in 'config' sets the
225
336
'checker_command' attribute and *not* the 'checker'
228
logger.debug(u"Creating client %r", self.name)
341
logger.debug("Creating client %r", self.name)
229
342
# Uppercase and remove spaces from fingerprint for later
230
343
# comparison purposes with return value from the fingerprint()
232
self.fingerprint = config["fingerprint"].upper()\
234
logger.debug(u" Fingerprint: %s", self.fingerprint)
345
self.fingerprint = (config["fingerprint"].upper()
347
logger.debug(" Fingerprint: %s", self.fingerprint)
235
348
if "secret" in config:
236
self.secret = config["secret"].decode(u"base64")
349
self.secret = config["secret"].decode("base64")
237
350
elif "secfile" in config:
238
sf = open(config["secfile"])
239
self.secret = sf.read()
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
354
self.secret = secfile.read()
242
raise TypeError(u"No secret or secfile for client %s"
356
raise TypeError("No secret or secfile for client %s"
244
self.fqdn = config.get("fqdn", "")
245
self.created = datetime.datetime.now()
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
361
self.last_approval_request = None
362
self.last_enabled = None
246
363
self.last_checked_ok = None
247
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
248
367
self.interval = string_to_delta(config["interval"])
249
self.stop_hook = stop_hook
368
self.disable_hook = disable_hook
250
369
self.checker = None
251
370
self.checker_initiator_tag = None
252
self.stop_initiator_tag = None
371
self.disable_initiator_tag = None
253
373
self.checker_callback_tag = None
254
self.check_command = config["checker"]
374
self.checker_command = config["checker"]
375
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
380
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
389
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
256
395
"""Start this client's checker and timeout hooks"""
396
if getattr(self, "enabled", False):
399
self.send_changedstate()
257
400
# Schedule a new checker to be started an 'interval' from now,
258
401
# and every interval from then on.
259
self.checker_initiator_tag = gobject.timeout_add\
260
(self._interval_milliseconds,
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
405
# Schedule a disable() when 'timeout' has passed
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
411
self.last_enabled = datetime.datetime.utcnow()
262
412
# Also start a new checker *right now*.
263
413
self.start_checker()
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
def disable(self, quiet=True):
416
"""Disable this client."""
417
if not getattr(self, "enabled", False):
278
if getattr(self, "stop_initiator_tag", False):
279
gobject.source_remove(self.stop_initiator_tag)
280
self.stop_initiator_tag = None
420
self.send_changedstate()
422
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
425
self.disable_initiator_tag = None
281
427
if getattr(self, "checker_initiator_tag", False):
282
428
gobject.source_remove(self.checker_initiator_tag)
283
429
self.checker_initiator_tag = None
284
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
287
434
# Do not run this again if called by a gobject.timeout_add
289
437
def __del__(self):
290
self.stop_hook = None
292
def checker_callback(self, pid, condition):
438
self.disable_hook = None
441
def checker_callback(self, pid, condition, command):
293
442
"""The checker has completed, so take appropriate actions."""
294
now = datetime.datetime.now()
295
443
self.checker_callback_tag = None
296
444
self.checker = None
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?",
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
448
logger.info("Checker for %(name)s succeeded",
452
logger.info("Checker for %(name)s failed",
455
logger.warning("Checker for %(name)s crashed?",
310
logger.info(u"Checker for %(name)s failed",
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
461
This should only be called when the client has been seen,
465
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
if self.disable_initiator_tag is not None:
468
gobject.source_remove(self.disable_initiator_tag)
469
if getattr(self, "enabled", False):
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
473
self.expires = datetime.datetime.utcnow() + timeout
475
def need_approval(self):
476
self.last_approval_request = datetime.datetime.utcnow()
312
478
def start_checker(self):
313
479
"""Start a new checker subprocess if one is not running.
314
481
If a checker already exists, leave it running and do
316
483
# The reason for not killing a running checker is that if we
360
560
logger.debug("Stopping checker for %(name)s", vars(self))
362
562
os.kill(self.checker.pid, signal.SIGTERM)
364
564
#if self.checker.poll() is None:
365
565
# os.kill(self.checker.pid, signal.SIGKILL)
366
except OSError, error:
566
except OSError as error:
367
567
if error.errno != errno.ESRCH: # No such process
369
569
self.checker = None
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.
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
574
"""Decorators for marking methods of a DBusObjectWithProperties to
575
become properties on the D-Bus.
577
The decorated method will be called with no arguments by "Get"
578
and with one argument by "Set".
580
The parameters, where they are supported, are the same as
581
dbus.service.method, except there is only "signature", since the
582
type from Get() and the type sent to Set() is the same.
584
# Encoding deeply encoded byte arrays is not supported yet by the
585
# "Set" method, so we fail early here:
586
if byte_arrays and signature != "ay":
587
raise ValueError("Byte arrays not supported for non-'ay'"
588
" signature %r" % signature)
590
func._dbus_is_property = True
591
func._dbus_interface = dbus_interface
592
func._dbus_signature = signature
593
func._dbus_access = access
594
func._dbus_name = func.__name__
595
if func._dbus_name.endswith("_dbus_property"):
596
func._dbus_name = func._dbus_name[:-14]
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
602
class DBusPropertyException(dbus.exceptions.DBusException):
603
"""A base class for D-Bus property-related exceptions
605
def __unicode__(self):
606
return unicode(str(self))
609
class DBusPropertyAccessException(DBusPropertyException):
610
"""A property's access permissions disallows an operation.
615
class DBusPropertyNotFound(DBusPropertyException):
616
"""An attempt was made to access a non-existing property.
621
class DBusObjectWithProperties(dbus.service.Object):
622
"""A D-Bus object with properties.
624
Classes inheriting from this can use the dbus_service_property
625
decorator to expose methods as D-Bus properties. It exposes the
626
standard Get(), Set(), and GetAll() methods on the D-Bus.
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
639
inspect.getmembers(cls, self._is_dbus_property))
641
def _get_dbus_property(self, interface_name, property_name):
642
"""Returns a bound method if one exists which is a D-Bus
643
property with the specified name and interface.
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
648
if (value._dbus_name == property_name
649
and value._dbus_interface == interface_name):
650
return value.__get__(self)
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
659
def Get(self, interface_name, property_name):
660
"""Standard D-Bus property Get() method, see D-Bus standard.
662
prop = self._get_dbus_property(interface_name, property_name)
663
if prop._dbus_access == "write":
664
raise DBusPropertyAccessException(property_name)
666
if not hasattr(value, "variant_level"):
668
return type(value)(value, variant_level=value.variant_level+1)
670
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
671
def Set(self, interface_name, property_name, value):
672
"""Standard D-Bus property Set() method, see D-Bus standard.
674
prop = self._get_dbus_property(interface_name, property_name)
675
if prop._dbus_access == "read":
676
raise DBusPropertyAccessException(property_name)
677
if prop._dbus_get_args_options["byte_arrays"]:
678
# The byte_arrays option is not supported yet on
679
# signatures other than "ay".
680
if prop._dbus_signature != "ay":
682
value = dbus.ByteArray(''.join(unichr(byte)
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
687
out_signature="a{sv}")
688
def GetAll(self, interface_name):
689
"""Standard D-Bus property GetAll() method, see D-Bus
692
Note: Will not include properties with access="write".
695
for name, prop in self._get_all_dbus_properties():
697
and interface_name != prop._dbus_interface):
698
# Interface non-empty but did not match
700
# Ignore write-only properties
701
if prop._dbus_access == "write":
704
if not hasattr(value, "variant_level"):
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
711
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
713
path_keyword='object_path',
714
connection_keyword='connection')
715
def Introspect(self, object_path, connection):
716
"""Standard D-Bus method, overloaded to insert property tags.
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
721
document = xml.dom.minidom.parseString(xmlstring)
722
def make_tag(document, name, prop):
723
e = document.createElement("property")
724
e.setAttribute("name", name)
725
e.setAttribute("type", prop._dbus_signature)
726
e.setAttribute("access", prop._dbus_access)
728
for if_tag in document.getElementsByTagName("interface"):
729
for tag in (make_tag(document, name, prop)
731
in self._get_all_dbus_properties()
732
if prop._dbus_interface
733
== if_tag.getAttribute("name")):
734
if_tag.appendChild(tag)
735
# Add the names to the return values for the
736
# "org.freedesktop.DBus.Properties" methods
737
if (if_tag.getAttribute("name")
738
== "org.freedesktop.DBus.Properties"):
739
for cn in if_tag.getElementsByTagName("method"):
740
if cn.getAttribute("name") == "Get":
741
for arg in cn.getElementsByTagName("arg"):
742
if (arg.getAttribute("direction")
744
arg.setAttribute("name", "value")
745
elif cn.getAttribute("name") == "GetAll":
746
for arg in cn.getElementsByTagName("arg"):
747
if (arg.getAttribute("direction")
749
arg.setAttribute("name", "props")
750
xmlstring = document.toxml("utf-8")
752
except (AttributeError, xml.dom.DOMException,
753
xml.parsers.expat.ExpatError) as error:
754
logger.error("Failed to override Introspection method",
759
def datetime_to_dbus (dt, variant_level=0):
760
"""Convert a UTC datetime.datetime() to a D-Bus type."""
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
778
# Ignore non-D-Bus attributes, and D-Bus attributes
779
# with the wrong interface name
780
if (not hasattr(attribute, "_dbus_interface")
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
784
# Create an alternate D-Bus interface name based on
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
789
# Is this a D-Bus signal?
790
if getattr(attribute, "_dbus_is_signal", False):
791
# Extract the original non-method function by
793
nonmethod_func = (dict(
794
zip(attribute.func_code.co_freevars,
795
attribute.__closure__))["func"]
797
# Create a new, but exactly alike, function
798
# object, and decorate it to be a new D-Bus signal
799
# with the alternate D-Bus interface name
800
new_function = (dbus.service.signal
802
attribute._dbus_signature)
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
809
# Define a creator of a function to call both the
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
812
def fixscope(func1, func2):
813
"""This function is a scope container to pass
814
func1 and func2 to the "call_both" function
815
outside of its arguments"""
816
def call_both(*args, **kwargs):
817
"""This function will emit two D-Bus
818
signals by calling func1 and func2"""
819
func1(*args, **kwargs)
820
func2(*args, **kwargs)
822
# Create the "call_both" function and add it to
824
attr[attrname] = fixscope(attribute,
826
# Is this a D-Bus method?
827
elif getattr(attribute, "_dbus_is_method", False):
828
# Create a new, but exactly alike, function
829
# object. Decorate it to be a new D-Bus method
830
# with the alternate D-Bus interface name. Add it
832
attr[attrname] = (dbus.service.method
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
837
(attribute.func_code,
838
attribute.func_globals,
840
attribute.func_defaults,
841
attribute.func_closure)))
842
# Is this a D-Bus property?
843
elif getattr(attribute, "_dbus_is_property", False):
844
# Create a new, but exactly alike, function
845
# object, and decorate it to be a new D-Bus
846
# property with the alternate D-Bus interface
847
# name. Add it to the class.
848
attr[attrname] = (dbus_service_property
850
attribute._dbus_signature,
851
attribute._dbus_access,
853
._dbus_get_args_options
856
(attribute.func_code,
857
attribute.func_globals,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
863
class ClientDBus(Client, DBusObjectWithProperties):
864
"""A Client class using D-Bus
867
dbus_object_path: dbus.ObjectPath
868
bus: dbus.SystemBus()
871
runtime_expansions = (Client.runtime_expansions
872
+ ("dbus_object_path",))
874
# dbus.service.Object doesn't use super(), so we can't either.
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
879
Client.__init__(self, *args, **kwargs)
880
# Only now, when this client is initialized, can it show up on
882
client_object_name = unicode(self.name).translate(
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
887
DBusObjectWithProperties.__init__(self, self.bus,
888
self.dbus_object_path)
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
893
""" Modify a variable so that it's a property which announces
896
transform_fun: Function that takes a value and a variant_level
897
and transforms it to a D-Bus type.
898
dbus_name: D-Bus name of the variable
899
type_func: Function that transform the value before sending it
900
to the D-Bus. Default: no transform
901
variant_level: D-Bus variant level. Default: 1
903
attrname = "_{0}".format(dbus_name)
904
def setter(self, value):
905
if hasattr(self, "dbus_object_path"):
906
if (not hasattr(self, attrname) or
907
type_func(getattr(self, attrname, None))
908
!= type_func(value)):
909
dbus_value = transform_func(type_func(value),
912
self.PropertyChanged(dbus.String(dbus_name),
914
setattr(self, attrname, value)
916
return property(lambda self: getattr(self, attrname), setter)
919
expires = notifychangeproperty(datetime_to_dbus, "Expires")
920
approvals_pending = notifychangeproperty(dbus.Boolean,
923
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
924
last_enabled = notifychangeproperty(datetime_to_dbus,
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
929
last_checked_ok = notifychangeproperty(datetime_to_dbus,
931
last_approval_request = notifychangeproperty(
932
datetime_to_dbus, "LastApprovalRequest")
933
approved_by_default = notifychangeproperty(dbus.Boolean,
935
approval_delay = notifychangeproperty(dbus.UInt16,
938
_timedelta_to_milliseconds)
939
approval_duration = notifychangeproperty(
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
942
host = notifychangeproperty(dbus.String, "Host")
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
945
_timedelta_to_milliseconds)
946
extended_timeout = notifychangeproperty(
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
952
_timedelta_to_milliseconds)
953
checker_command = notifychangeproperty(dbus.String, "Checker")
955
del notifychangeproperty
957
def __del__(self, *args, **kwargs):
959
self.remove_from_connection()
962
if hasattr(DBusObjectWithProperties, "__del__"):
963
DBusObjectWithProperties.__del__(self, *args, **kwargs)
964
Client.__del__(self, *args, **kwargs)
966
def checker_callback(self, pid, condition, command,
968
self.checker_callback_tag = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
973
self.CheckerCompleted(dbus.Int16(exitstatus),
974
dbus.Int64(condition),
975
dbus.String(command))
978
self.CheckerCompleted(dbus.Int16(-1),
979
dbus.Int64(condition),
980
dbus.String(command))
982
return Client.checker_callback(self, pid, condition, command,
985
def start_checker(self, *args, **kwargs):
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
990
old_checker_pid = None
991
r = Client.start_checker(self, *args, **kwargs)
992
# Only if new checker process was started
993
if (self.checker is not None
994
and old_checker_pid != self.checker.pid):
996
self.CheckerStarted(self.current_checker_command)
999
def _reset_approved(self):
1000
self._approved = None
1003
def approve(self, value=True):
1004
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1016
# CheckerCompleted - signal
1017
@dbus.service.signal(_interface, signature="nxs")
1018
def CheckerCompleted(self, exitcode, waitstatus, command):
1022
# CheckerStarted - signal
1023
@dbus.service.signal(_interface, signature="s")
1024
def CheckerStarted(self, command):
1028
# PropertyChanged - signal
1029
@dbus.service.signal(_interface, signature="sv")
1030
def PropertyChanged(self, property, value):
1034
# GotSecret - signal
1035
@dbus.service.signal(_interface)
1036
def GotSecret(self):
1038
Is sent after a successful transfer of secret from the Mandos
1039
server to mandos-client
1044
@dbus.service.signal(_interface, signature="s")
1045
def Rejected(self, reason):
1049
# NeedApproval - signal
1050
@dbus.service.signal(_interface, signature="tb")
1051
def NeedApproval(self, timeout, default):
1053
return self.need_approval()
1058
@dbus.service.method(_interface, in_signature="b")
1059
def Approve(self, value):
1062
# CheckedOK - method
1063
@dbus.service.method(_interface)
1064
def CheckedOK(self):
1068
@dbus.service.method(_interface)
1073
# StartChecker - method
1074
@dbus.service.method(_interface)
1075
def StartChecker(self):
1077
self.start_checker()
1080
@dbus.service.method(_interface)
1085
# StopChecker - method
1086
@dbus.service.method(_interface)
1087
def StopChecker(self):
1092
# ApprovalPending - property
1093
@dbus_service_property(_interface, signature="b", access="read")
1094
def ApprovalPending_dbus_property(self):
1095
return dbus.Boolean(bool(self.approvals_pending))
1097
# ApprovedByDefault - property
1098
@dbus_service_property(_interface, signature="b",
1100
def ApprovedByDefault_dbus_property(self, value=None):
1101
if value is None: # get
1102
return dbus.Boolean(self.approved_by_default)
1103
self.approved_by_default = bool(value)
1105
# ApprovalDelay - property
1106
@dbus_service_property(_interface, signature="t",
1108
def ApprovalDelay_dbus_property(self, value=None):
1109
if value is None: # get
1110
return dbus.UInt64(self.approval_delay_milliseconds())
1111
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1113
# ApprovalDuration - property
1114
@dbus_service_property(_interface, signature="t",
1116
def ApprovalDuration_dbus_property(self, value=None):
1117
if value is None: # get
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
1120
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1123
@dbus_service_property(_interface, signature="s", access="read")
1124
def Name_dbus_property(self):
1125
return dbus.String(self.name)
1127
# Fingerprint - property
1128
@dbus_service_property(_interface, signature="s", access="read")
1129
def Fingerprint_dbus_property(self):
1130
return dbus.String(self.fingerprint)
1133
@dbus_service_property(_interface, signature="s",
1135
def Host_dbus_property(self, value=None):
1136
if value is None: # get
1137
return dbus.String(self.host)
1140
# Created - property
1141
@dbus_service_property(_interface, signature="s", access="read")
1142
def Created_dbus_property(self):
1143
return dbus.String(datetime_to_dbus(self.created))
1145
# LastEnabled - property
1146
@dbus_service_property(_interface, signature="s", access="read")
1147
def LastEnabled_dbus_property(self):
1148
return datetime_to_dbus(self.last_enabled)
1150
# Enabled - property
1151
@dbus_service_property(_interface, signature="b",
1153
def Enabled_dbus_property(self, value=None):
1154
if value is None: # get
1155
return dbus.Boolean(self.enabled)
1161
# LastCheckedOK - property
1162
@dbus_service_property(_interface, signature="s",
1164
def LastCheckedOK_dbus_property(self, value=None):
1165
if value is not None:
1168
return datetime_to_dbus(self.last_checked_ok)
1170
# Expires - property
1171
@dbus_service_property(_interface, signature="s", access="read")
1172
def Expires_dbus_property(self):
1173
return datetime_to_dbus(self.expires)
1175
# LastApprovalRequest - property
1176
@dbus_service_property(_interface, signature="s", access="read")
1177
def LastApprovalRequest_dbus_property(self):
1178
return datetime_to_dbus(self.last_approval_request)
1180
# Timeout - property
1181
@dbus_service_property(_interface, signature="t",
1183
def Timeout_dbus_property(self, value=None):
1184
if value is None: # get
1185
return dbus.UInt64(self.timeout_milliseconds())
1186
self.timeout = datetime.timedelta(0, 0, 0, value)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1193
time_to_die = _timedelta_to_milliseconds((self
1198
if time_to_die <= 0:
1199
# The timeout has passed
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1208
# ExtendedTimeout - property
1209
@dbus_service_property(_interface, signature="t",
1211
def ExtendedTimeout_dbus_property(self, value=None):
1212
if value is None: # get
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
1214
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1216
# Interval - property
1217
@dbus_service_property(_interface, signature="t",
1219
def Interval_dbus_property(self, value=None):
1220
if value is None: # get
1221
return dbus.UInt64(self.interval_milliseconds())
1222
self.interval = datetime.timedelta(0, 0, 0, value)
1223
if getattr(self, "checker_initiator_tag", None) is None:
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1231
# Checker - property
1232
@dbus_service_property(_interface, signature="s",
1234
def Checker_dbus_property(self, value=None):
1235
if value is None: # get
1236
return dbus.String(self.checker_command)
1237
self.checker_command = value
1239
# CheckerRunning - property
1240
@dbus_service_property(_interface, signature="b",
1242
def CheckerRunning_dbus_property(self, value=None):
1243
if value is None: # get
1244
return dbus.Boolean(self.checker is not None)
1246
self.start_checker()
1250
# ObjectPath - property
1251
@dbus_service_property(_interface, signature="o", access="read")
1252
def ObjectPath_dbus_property(self):
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
1258
def Secret_dbus_property(self, value):
1259
self.secret = str(value)
1264
class ProxyClient(object):
1265
def __init__(self, child_pipe, fpr, address):
1266
self._pipe = child_pipe
1267
self._pipe.send(('init', fpr, address))
1268
if not self._pipe.recv():
1271
def __getattribute__(self, name):
1272
if(name == '_pipe'):
1273
return super(ProxyClient, self).__getattribute__(name)
1274
self._pipe.send(('getattr', name))
1275
data = self._pipe.recv()
1276
if data[0] == 'data':
1278
if data[0] == 'function':
1279
def func(*args, **kwargs):
1280
self._pipe.send(('funcall', name, args, kwargs))
1281
return self._pipe.recv()[1]
1284
def __setattr__(self, name, value):
1285
if(name == '_pipe'):
1286
return super(ProxyClient, self).__setattr__(name, value)
1287
self._pipe.send(('setattr', name, value))
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1292
class ClientHandler(socketserver.BaseRequestHandler, object):
1293
"""A class to handle client connections.
1295
Instantiated once for each connection to handle it.
429
1296
Note: This will run in its own forked process."""
431
1298
def handle(self):
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.
1299
with contextlib.closing(self.server.child_pipe) as child_pipe:
1300
logger.info("TCP connection from: %s",
1301
unicode(self.client_address))
1302
logger.debug("Pipe FD: %d",
1303
self.server.child_pipe.fileno())
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1308
.X509Credentials()))
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1319
# Use a fallback default, since this MUST be set.
1320
priority = self.server.gnutls_priority
1321
if priority is None:
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1327
# Start communication using the Mandos protocol
1328
# Get protocol number
1329
line = self.request.makefile().readline()
1330
logger.debug("Protocol version: %r", line)
1332
if int(line.strip().split()[0]) > 1:
1334
except (ValueError, IndexError, RuntimeError) as error:
1335
logger.error("Unknown protocol version: %s", error)
1338
# Start GnuTLS connection
1341
except gnutls.errors.GNUTLSError as error:
1342
logger.warning("Handshake failed: %s", error)
1343
# Do not run session.bye() here: the session is not
1344
# established. Just abandon the request.
1346
logger.debug("Handshake succeeded")
1348
approval_required = False
1351
fpr = self.fingerprint(self.peer_certificate
1354
gnutls.errors.GNUTLSError) as error:
1355
logger.warning("Bad certificate: %s", error)
1357
logger.debug("Fingerprint: %s", fpr)
1360
client = ProxyClient(child_pipe, fpr,
1361
self.client_address)
1365
if client.approval_delay:
1366
delay = client.approval_delay
1367
client.approvals_pending += 1
1368
approval_required = True
1371
if not client.enabled:
1372
logger.info("Client %s is disabled",
1374
if self.server.use_dbus:
1376
client.Rejected("Disabled")
1379
if client._approved or not client.approval_delay:
1380
#We are approved or approval is disabled
1382
elif client._approved is None:
1383
logger.info("Client %s needs approval",
1385
if self.server.use_dbus:
1387
client.NeedApproval(
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
1391
logger.warning("Client %s was not approved",
1393
if self.server.use_dbus:
1395
client.Rejected("Denied")
1398
#wait until timeout or approved
1399
time = datetime.datetime.now()
1400
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1404
client.changedstate.release()
1405
time2 = datetime.datetime.now()
1406
if (time2 - time) >= delay:
1407
if not client.approved_by_default:
1408
logger.warning("Client %s timed out while"
1409
" waiting for approval",
1411
if self.server.use_dbus:
1413
client.Rejected("Approval timed out")
1418
delay -= time2 - time
1421
while sent_size < len(client.secret):
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1432
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout using extended_timeout
1434
client.checked_ok(client.extended_timeout)
1435
if self.server.use_dbus:
1440
if approval_required:
1441
client.approvals_pending -= 1
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1448
def peer_certificate(session):
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
1456
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
1459
(session._c_object, ctypes.byref(list_size)))
1460
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1463
if list_size.value == 0:
1466
return ctypes.string_at(cert.data, cert.size)
1469
def fingerprint(openpgp):
1470
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1476
ctypes.c_uint(len(openpgp))))
1477
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1481
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
1486
# Verify the self signature in the key
1487
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
1491
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1495
# New buffer for the fingerprint
1496
buf = ctypes.create_string_buffer(20)
1497
buf_len = ctypes.c_size_t()
1498
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
1502
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1504
# Convert the buffer to a Python bytestring
1505
fpr = ctypes.string_at(buf, buf_len.value)
1506
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1511
class MultiprocessingMixIn(object):
1512
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1513
def sub_process_main(self, request, address):
1515
self.finish_request(request, address)
1517
self.handle_error(request, address)
1518
self.close_request(request)
1520
def process_request(self, request, address):
1521
"""Start a new process to process the request."""
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1529
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1530
""" adds a pipe to the MixIn """
1531
def process_request(self, request, client_address):
1532
"""Overrides and wraps the original process_request().
1534
This function creates a new pipe in self.pipe
1536
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1538
proc = MultiprocessingMixIn.process_request(self, request,
1540
self.child_pipe.close()
1541
self.add_pipe(parent_pipe, proc)
1543
def add_pipe(self, parent_pipe, proc):
1544
"""Dummy function; override as necessary"""
1545
raise NotImplementedError
1548
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1549
socketserver.TCPServer, object):
1550
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
506
settings: Server settings
507
clients: Set() of Client objects
1553
enabled: Boolean; whether this server is activated yet
1554
interface: None or a network interface name (string)
1555
use_ipv6: Boolean; to use IPv6 or not
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)
1557
def __init__(self, server_address, RequestHandlerClass,
1558
interface=None, use_ipv6=True):
1559
self.interface = interface
1561
self.address_family = socket.AF_INET6
1562
socketserver.TCPServer.__init__(self, server_address,
1563
RequestHandlerClass)
518
1564
def server_bind(self):
519
1565
"""This overrides the normal server_bind() function
520
1566
to bind to an interface if one was specified, and also NOT to
521
1567
bind to an address or port if they were not specified."""
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"])
1568
if self.interface is not None:
1569
if SO_BINDTODEVICE is None:
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
536
1590
# Only bind(2) the socket if we really need to.
537
1591
if self.server_address[0] or self.server_address[1]:
538
1592
if not self.server_address[0]:
540
self.server_address = (in6addr_any,
1593
if self.address_family == socket.AF_INET6:
1594
any_address = "::" # in6addr_any
1596
any_address = socket.INADDR_ANY
1597
self.server_address = (any_address,
541
1598
self.server_address[1])
542
elif self.server_address[1] is None:
1599
elif not self.server_address[1]:
543
1600
self.server_address = (self.server_address[0],
545
return super(type(self), self).server_bind()
1602
# if self.interface:
1603
# self.server_address = (self.server_address[0],
1608
return socketserver.TCPServer.server_bind(self)
1611
class MandosServer(IPv6_TCPServer):
1615
clients: set of Client objects
1616
gnutls_priority GnuTLS priority string
1617
use_dbus: Boolean; to emit D-Bus signals or not
1619
Assumes a gobject.MainLoop event loop.
1621
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
1624
self.enabled = False
1625
self.clients = clients
1626
if self.clients is None:
1627
self.clients = set()
1628
self.use_dbus = use_dbus
1629
self.gnutls_priority = gnutls_priority
1630
IPv6_TCPServer.__init__(self, server_address,
1631
RequestHandlerClass,
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
1634
def server_activate(self):
1636
return socketserver.TCPServer.server_activate(self)
1641
def add_pipe(self, parent_pipe, proc):
1642
# Call "handle_ipc" for both data and EOF events
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1662
conditions_string = ' | '.join(name
1664
condition_names.iteritems()
1665
if cond & condition)
1666
# error, or the other end of multiprocessing.Pipe has closed
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1668
# Wait for other process to exit
1672
# Read a request from the child
1673
request = parent_pipe.recv()
1674
command = request[0]
1676
if command == 'init':
1678
address = request[2]
1680
for c in self.clients:
1681
if c.fingerprint == fpr:
1685
logger.info("Client not found for fingerprint: %s, ad"
1686
"dress: %s", fpr, address)
1689
mandos_dbus_service.ClientNotFound(fpr,
1691
parent_pipe.send(False)
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1702
parent_pipe.send(True)
1703
# remove the old hook in favor of the new above hook on
1706
if command == 'funcall':
1707
funcname = request[1]
1711
parent_pipe.send(('data', getattr(client_object,
1715
if command == 'getattr':
1716
attrname = request[1]
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1723
if command == 'setattr':
1724
attrname = request[1]
1726
setattr(client_object, attrname, value)
548
1731
def string_to_delta(interval):
549
1732
"""Parse a string and return a datetime.timedelta
551
1734
>>> string_to_delta('7d')
552
1735
datetime.timedelta(7)
553
1736
>>> string_to_delta('60s')
688
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
689
1868
"servicename": "Mandos",
692
1874
# Parse config file for server-global settings
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
1875
server_config = configparser.SafeConfigParser(server_defaults)
694
1876
del server_defaults
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
1877
server_config.read(os.path.join(options.configdir,
697
1879
# Convert the SafeConfigParser object to a dict
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")
1880
server_settings = server_config.defaults()
1881
# Use the appropriate methods on the non-string config options
1882
for option in ("debug", "use_dbus", "use_ipv6"):
1883
server_settings[option] = server_config.getboolean("DEFAULT",
1885
if server_settings["port"]:
1886
server_settings["port"] = server_config.getint("DEFAULT",
702
1888
del server_config
704
1890
# Override the settings from the config file with command line
705
1891
# options, if set.
706
1892
for option in ("interface", "address", "port", "debug",
707
"priority", "servicename", "configdir"):
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
708
1895
value = getattr(options, option)
709
1896
if value is not None:
710
1897
server_settings[option] = value
1899
# Force all strings to be unicode
1900
for option in server_settings.keys():
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
712
1903
# Now we have our good server settings in "server_settings"
1905
##################################################################
1908
debug = server_settings["debug"]
1909
debuglevel = server_settings["debuglevel"]
1910
use_dbus = server_settings["use_dbus"]
1911
use_ipv6 = server_settings["use_ipv6"]
1913
if server_settings["servicename"] != "Mandos":
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
714
1919
# Parse config file with clients
715
client_defaults = { "timeout": "1h",
717
"checker": "fping -q -- %%(fqdn)s",
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1923
"checker": "fping -q -- %%(host)s",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
1928
client_config = configparser.SafeConfigParser(client_defaults)
720
1929
client_config.read(os.path.join(server_settings["configdir"],
721
1930
"clients.conf"))
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
1932
global mandos_dbus_service
1933
mandos_dbus_service = None
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1938
interface=(server_settings["interface"]
1942
server_settings["priority"],
1945
pidfilename = "/var/run/mandos.pid"
1947
pidfile = open(pidfilename, "w")
1949
logger.error("Could not open file %r", pidfilename)
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1968
except OSError as error:
1969
if error[0] != errno.EPERM:
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1981
# Enable all possible GnuTLS debugging
1983
# "Use a log level over 10 to enable all debugging options."
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1987
@gnutls.library.types.gnutls_log_func
1988
def debug_gnutls(level, string):
1989
logger.debug("GnuTLS: %s", string[:-1])
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1994
# Redirect stdin so all checkers get /dev/null
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1996
os.dup2(null, sys.stdin.fileno())
2000
# No console logging
2001
logger.removeHandler(console)
2003
# Need to fork before connecting to D-Bus
2005
# Close all input and output, do double fork, etc.
729
2008
global main_loop
732
2009
# From the Avahi example code
733
2010
DBusGMainLoop(set_as_default=True )
734
2011
main_loop = gobject.MainLoop()
735
2012
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
739
2013
# End of Avahi example code
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()))
2016
bus_name = dbus.service.BusName("se.recompile.Mandos",
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
2024
server_settings["use_dbus"] = False
2025
tcp_server.use_dbus = False
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2034
global multiprocessing_manager
2035
multiprocessing_manager = multiprocessing.Manager()
2037
client_class = Client
2039
client_class = functools.partial(ClientDBusTransitional,
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2047
for name, value in config.items(section):
2049
yield (name, special_settings[name]())
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
2058
if not tcp_server.clients:
2059
logger.warning("No clients defined")
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2068
logger.error("Could not write to file %r with PID %d",
2071
# "pidfile" was never created
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2081
class MandosDBusService(dbus.service.Object):
2082
"""A D-Bus proxy object"""
2084
dbus.service.Object.__init__(self, bus, "/")
2085
_interface = "se.recompile.Mandos"
2087
@dbus.service.signal(_interface, signature="o")
2088
def ClientAdded(self, objpath):
2092
@dbus.service.signal(_interface, signature="ss")
2093
def ClientNotFound(self, fingerprint, address):
2097
@dbus.service.signal(_interface, signature="os")
2098
def ClientRemoved(self, objpath, name):
2102
@dbus.service.method(_interface, out_signature="ao")
2103
def GetAllClients(self):
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2108
@dbus.service.method(_interface,
2109
out_signature="a{oa{sv}}")
2110
def GetAllClientsWithProperties(self):
2112
return dbus.Dictionary(
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
2117
@dbus.service.method(_interface, in_signature="o")
2118
def RemoveClient(self, object_path):
2120
for c in tcp_server.clients:
2121
if c.dbus_object_path == object_path:
2122
tcp_server.clients.remove(c)
2123
c.remove_from_connection()
2124
# Don't signal anything except ClientRemoved
2125
c.disable(quiet=True)
2127
self.ClientRemoved(object_path, c.name)
2129
raise KeyError(object_path)
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
768
2138
"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
2141
multiprocessing.active_children()
2142
while tcp_server.clients:
2143
client = tcp_server.clients.pop()
2145
client.remove_from_connection()
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
2148
client.disable(quiet=True)
2151
mandos_dbus_service.ClientRemoved(client
781
2155
atexit.register(cleanup)
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
788
for client in clients:
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
794
settings=server_settings,
2157
for client in tcp_server.clients:
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2164
tcp_server.server_activate()
796
2166
# Find out what port we got
797
2167
service.port = tcp_server.socket.getsockname()[1]
798
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
2169
logger.info("Now listening on address %r, port %d,"
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
801
2176
#service.interface = tcp_server.socket.getsockname()[3]
804
2179
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
807
server_state_changed(server.GetState())
808
except dbus.exceptions.DBusException, error:
809
logger.critical(u"DBusException: %s", error)
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
811
2186
# End of Avahi example code
813
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
814
2189
lambda *args, **kwargs:
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
818
2193
logger.debug("Starting main loop")
819
main_loop_started = True
821
except AvahiError, error:
822
logger.critical(u"AvahiError: %s" + unicode(error))
2195
except AvahiError as error:
2196
logger.critical("AvahiError: %s", error)
824
2199
except KeyboardInterrupt:
2201
print("", file=sys.stderr)
2202
logger.debug("Server received KeyboardInterrupt")
2203
logger.debug("Server exiting")
2204
# Must run before the D-Bus bus name gets deregistered
828
2208
if __name__ == '__main__':