235
196
.replace(b"\n", b"\\n")
236
197
.replace(b"\0", b"\\x00"))
239
200
def encrypt(self, data, password):
240
201
passphrase = self.password_encode(password)
241
202
with tempfile.NamedTemporaryFile(
242
203
dir=self.tempdir) as passfile:
243
204
passfile.write(passphrase)
245
proc = subprocess.Popen([self.gpg, '--symmetric',
206
proc = subprocess.Popen(['gpg', '--symmetric',
246
207
'--passphrase-file',
248
209
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
253
214
if proc.returncode != 0:
254
215
raise PGPError(err)
255
216
return ciphertext
257
218
def decrypt(self, data, password):
258
219
passphrase = self.password_encode(password)
259
220
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
221
dir = self.tempdir) as passfile:
261
222
passfile.write(passphrase)
263
proc = subprocess.Popen([self.gpg, '--decrypt',
224
proc = subprocess.Popen(['gpg', '--decrypt',
264
225
'--passphrase-file',
266
227
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
271
232
if proc.returncode != 0:
272
233
raise PGPError(err)
273
234
return decrypted_plaintext
276
# Pretend that we have an Avahi module
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
303
237
class AvahiError(Exception):
304
238
def __init__(self, value, *args, **kwargs):
305
239
self.value = value
501
435
.format(self.name)))
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
510
library = ctypes.util.find_library("gnutls")
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
515
_need_version = b"3.3.0"
518
# Need to use "self" here, since this method is called before
519
# the assignment to the "gnutls" global variable happens.
520
if self.check_version(self._need_version) is None:
521
raise self.Error("Needs GnuTLS {} or later"
522
.format(self._need_version))
524
# Unless otherwise indicated, the constants and types below are
525
# all from the gnutls/gnutls.h C header file.
535
E_NO_CERTIFICATE_FOUND = -49
536
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
539
class session_int(ctypes.Structure):
541
session_t = ctypes.POINTER(session_int)
543
class certificate_credentials_st(ctypes.Structure):
545
certificate_credentials_t = ctypes.POINTER(
546
certificate_credentials_st)
547
certificate_type_t = ctypes.c_int
549
class datum_t(ctypes.Structure):
550
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
('size', ctypes.c_uint)]
553
class openpgp_crt_int(ctypes.Structure):
555
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
557
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
credentials_type_t = ctypes.c_int
559
transport_ptr_t = ctypes.c_void_p
560
close_request_t = ctypes.c_int
563
class Error(Exception):
564
# We need to use the class name "GnuTLS" here, since this
565
# exception might be raised from within GnuTLS.__init__,
566
# which is called before the assignment to the "gnutls"
567
# global variable has happened.
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
573
if message is None and code is not None:
574
message = GnuTLS.strerror(code)
575
return super(GnuTLS.Error, self).__init__(
578
class CertificateSecurityError(Error):
582
class Credentials(object):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
590
gnutls.certificate_free_credentials(self._c_object)
592
class ClientSession(object):
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
gnutls.set_default_priority(self._c_object)
597
gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
gnutls.handshake_set_private_extensions(self._c_object,
601
if credentials is None:
602
credentials = gnutls.Credentials()
603
gnutls.credentials_set(self._c_object, credentials.type,
604
ctypes.cast(credentials._c_object,
606
self.credentials = credentials
609
gnutls.deinit(self._c_object)
612
return gnutls.handshake(self._c_object)
614
def send(self, data):
618
data_len -= gnutls.record_send(self._c_object,
623
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
# Error handling functions
626
def _error_code(result):
627
"""A function to raise exceptions on errors, suitable
628
for the 'restype' attribute on ctypes functions"""
631
if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
raise gnutls.CertificateSecurityError(code=result)
633
raise gnutls.Error(code=result)
635
def _retry_on_error(result, func, arguments):
636
"""A function to retry on some errors, suitable
637
for the 'errcheck' attribute on ctypes functions"""
639
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
return _error_code(result)
641
result = func(*arguments)
644
# Unless otherwise indicated, the function declarations below are
645
# all from the gnutls/gnutls.h C header file.
648
priority_set_direct = _library.gnutls_priority_set_direct
649
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
ctypes.POINTER(ctypes.c_char_p)]
651
priority_set_direct.restype = _error_code
653
init = _library.gnutls_init
654
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
init.restype = _error_code
657
set_default_priority = _library.gnutls_set_default_priority
658
set_default_priority.argtypes = [session_t]
659
set_default_priority.restype = _error_code
661
record_send = _library.gnutls_record_send
662
record_send.argtypes = [session_t, ctypes.c_void_p,
664
record_send.restype = ctypes.c_ssize_t
665
record_send.errcheck = _retry_on_error
667
certificate_allocate_credentials = (
668
_library.gnutls_certificate_allocate_credentials)
669
certificate_allocate_credentials.argtypes = [
670
ctypes.POINTER(certificate_credentials_t)]
671
certificate_allocate_credentials.restype = _error_code
673
certificate_free_credentials = (
674
_library.gnutls_certificate_free_credentials)
675
certificate_free_credentials.argtypes = [
676
certificate_credentials_t]
677
certificate_free_credentials.restype = None
679
handshake_set_private_extensions = (
680
_library.gnutls_handshake_set_private_extensions)
681
handshake_set_private_extensions.argtypes = [session_t,
683
handshake_set_private_extensions.restype = None
685
credentials_set = _library.gnutls_credentials_set
686
credentials_set.argtypes = [session_t, credentials_type_t,
688
credentials_set.restype = _error_code
690
strerror = _library.gnutls_strerror
691
strerror.argtypes = [ctypes.c_int]
692
strerror.restype = ctypes.c_char_p
694
certificate_type_get = _library.gnutls_certificate_type_get
695
certificate_type_get.argtypes = [session_t]
696
certificate_type_get.restype = _error_code
698
certificate_get_peers = _library.gnutls_certificate_get_peers
699
certificate_get_peers.argtypes = [session_t,
700
ctypes.POINTER(ctypes.c_uint)]
701
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
global_set_log_level = _library.gnutls_global_set_log_level
704
global_set_log_level.argtypes = [ctypes.c_int]
705
global_set_log_level.restype = None
707
global_set_log_function = _library.gnutls_global_set_log_function
708
global_set_log_function.argtypes = [log_func]
709
global_set_log_function.restype = None
711
deinit = _library.gnutls_deinit
712
deinit.argtypes = [session_t]
713
deinit.restype = None
715
handshake = _library.gnutls_handshake
716
handshake.argtypes = [session_t]
717
handshake.restype = _error_code
718
handshake.errcheck = _retry_on_error
720
transport_set_ptr = _library.gnutls_transport_set_ptr
721
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
transport_set_ptr.restype = None
724
bye = _library.gnutls_bye
725
bye.argtypes = [session_t, close_request_t]
726
bye.restype = _error_code
727
bye.errcheck = _retry_on_error
729
check_version = _library.gnutls_check_version
730
check_version.argtypes = [ctypes.c_char_p]
731
check_version.restype = ctypes.c_char_p
733
# All the function declarations below are from gnutls/openpgp.h
735
openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
openpgp_crt_init.restype = _error_code
739
openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
openpgp_crt_import.argtypes = [openpgp_crt_t,
741
ctypes.POINTER(datum_t),
743
openpgp_crt_import.restype = _error_code
745
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
ctypes.POINTER(ctypes.c_uint)]
748
openpgp_crt_verify_self.restype = _error_code
750
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
openpgp_crt_deinit.restype = None
754
openpgp_crt_get_fingerprint = (
755
_library.gnutls_openpgp_crt_get_fingerprint)
756
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
760
openpgp_crt_get_fingerprint.restype = _error_code
762
# Remove non-public functions
763
del _error_code, _retry_on_error
764
# Create the global "gnutls" object, simulating a module
768
438
def call_pipe(connection, # : multiprocessing.Connection
769
439
func, *args, **kwargs):
770
440
"""This function is meant to be called by multiprocessing.Process
772
442
This function runs func(*args, **kwargs), and writes the resulting
773
443
return value on the provided multiprocessing.Connection.
775
445
connection.send(func(*args, **kwargs))
776
446
connection.close()
779
448
class Client(object):
780
449
"""A representation of a client host served by this server.
783
452
approved: bool(); 'None' if not yet approved/disapproved
784
453
approval_delay: datetime.timedelta(); Time to wait for approval
959
626
logger.info("Disabling client %s", self.name)
960
627
if getattr(self, "disable_initiator_tag", None) is not None:
961
GLib.source_remove(self.disable_initiator_tag)
628
gobject.source_remove(self.disable_initiator_tag)
962
629
self.disable_initiator_tag = None
963
630
self.expires = None
964
631
if getattr(self, "checker_initiator_tag", None) is not None:
965
GLib.source_remove(self.checker_initiator_tag)
632
gobject.source_remove(self.checker_initiator_tag)
966
633
self.checker_initiator_tag = None
967
634
self.stop_checker()
968
635
self.enabled = False
970
637
self.send_changedstate()
971
# Do not run this again if called by a GLib.timeout_add
638
# Do not run this again if called by a gobject.timeout_add
974
641
def __del__(self):
977
644
def init_checker(self):
978
645
# Schedule a new checker to be started an 'interval' from now,
979
646
# and every interval from then on.
980
647
if self.checker_initiator_tag is not None:
981
GLib.source_remove(self.checker_initiator_tag)
982
self.checker_initiator_tag = GLib.timeout_add(
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
983
650
int(self.interval.total_seconds() * 1000),
984
651
self.start_checker)
985
652
# Schedule a disable() when 'timeout' has passed
986
653
if self.disable_initiator_tag is not None:
987
GLib.source_remove(self.disable_initiator_tag)
988
self.disable_initiator_tag = GLib.timeout_add(
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
989
656
int(self.timeout.total_seconds() * 1000), self.disable)
990
657
# Also start a new checker *right now*.
991
658
self.start_checker()
993
660
def checker_callback(self, source, condition, connection,
995
662
"""The checker has completed, so take appropriate actions."""
1229
895
for cls in self.__class__.__mro__
1230
896
for name, athing in
1231
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
path_keyword='object_path',
1236
connection_keyword='connection')
1237
def Introspect(self, object_path, connection):
1238
"""Overloading of standard D-Bus method.
1240
Inserts annotation tags on methods and signals.
1242
xmlstring = dbus.service.Object.Introspect(self, object_path,
1245
document = xml.dom.minidom.parseString(xmlstring)
1247
for if_tag in document.getElementsByTagName("interface"):
1248
# Add annotation tags
1249
for typ in ("method", "signal"):
1250
for tag in if_tag.getElementsByTagName(typ):
1252
for name, prop in (self.
1253
_get_all_dbus_things(typ)):
1254
if (name == tag.getAttribute("name")
1255
and prop._dbus_interface
1256
== if_tag.getAttribute("name")):
1257
annots.update(getattr(
1258
prop, "_dbus_annotations", {}))
1259
for name, value in annots.items():
1260
ann_tag = document.createElement(
1262
ann_tag.setAttribute("name", name)
1263
ann_tag.setAttribute("value", value)
1264
tag.appendChild(ann_tag)
1265
# Add interface annotation tags
1266
for annotation, value in dict(
1267
itertools.chain.from_iterable(
1268
annotations().items()
1269
for name, annotations
1270
in self._get_all_dbus_things("interface")
1271
if name == if_tag.getAttribute("name")
1273
ann_tag = document.createElement("annotation")
1274
ann_tag.setAttribute("name", annotation)
1275
ann_tag.setAttribute("value", value)
1276
if_tag.appendChild(ann_tag)
1277
# Fix argument name for the Introspect method itself
1278
if (if_tag.getAttribute("name")
1279
== dbus.INTROSPECTABLE_IFACE):
1280
for cn in if_tag.getElementsByTagName("method"):
1281
if cn.getAttribute("name") == "Introspect":
1282
for arg in cn.getElementsByTagName("arg"):
1283
if (arg.getAttribute("direction")
1285
arg.setAttribute("name",
1287
xmlstring = document.toxml("utf-8")
1289
except (AttributeError, xml.dom.DOMException,
1290
xml.parsers.expat.ExpatError) as error:
1291
logger.error("Failed to override Introspection method",
1296
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1297
"""A D-Bus object with properties.
1299
Classes inheriting from this can use the dbus_service_property
1300
decorator to expose methods as D-Bus properties. It exposes the
1301
standard Get(), Set(), and GetAll() methods on the D-Bus.
1304
899
def _get_dbus_property(self, interface_name, property_name):
1305
900
"""Returns a bound method if one exists which is a D-Bus
1306
901
property with the specified name and interface.
1421
1006
if prop._dbus_interface
1422
1007
== if_tag.getAttribute("name")):
1423
1008
if_tag.appendChild(tag)
1424
# Add annotation tags for properties
1425
for tag in if_tag.getElementsByTagName("property"):
1427
for name, prop in self._get_all_dbus_things(
1429
if (name == tag.getAttribute("name")
1430
and prop._dbus_interface
1431
== if_tag.getAttribute("name")):
1432
annots.update(getattr(
1433
prop, "_dbus_annotations", {}))
1434
for name, value in annots.items():
1435
ann_tag = document.createElement(
1437
ann_tag.setAttribute("name", name)
1438
ann_tag.setAttribute("value", value)
1439
tag.appendChild(ann_tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1440
1038
# Add the names to the return values for the
1441
1039
# "org.freedesktop.DBus.Properties" methods
1442
1040
if (if_tag.getAttribute("name")
1461
1059
return xmlstring
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1478
Note: No signals are sent automatically; they must be sent
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1510
document = xml.dom.minidom.parseString(xmlstring)
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1524
"objpath_interfaces"
1526
xmlstring = document.toxml("utf-8")
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1535
1062
def datetime_to_dbus(dt, variant_level=0):
1536
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1538
return dbus.String("", variant_level=variant_level)
1065
return dbus.String("", variant_level = variant_level)
1539
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
2189
1709
class ClientHandler(socketserver.BaseRequestHandler, object):
2190
1710
"""A class to handle client connections.
2192
1712
Instantiated once for each connection to handle it.
2193
1713
Note: This will run in its own forked process."""
2195
1715
def handle(self):
2196
1716
with contextlib.closing(self.server.child_pipe) as child_pipe:
2197
1717
logger.info("TCP connection from: %s",
2198
1718
str(self.client_address))
2199
1719
logger.debug("Pipe FD: %d",
2200
1720
self.server.child_pipe.fileno())
2202
session = gnutls.ClientSession(self.request)
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
1725
# Note: gnutls.connection.X509Credentials is really a
1726
# generic GnuTLS certificate credentials object so long as
1727
# no X.509 keys are added to it. Therefore, we can use it
1728
# here despite using OpenPGP certificates.
1730
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1731
# "+AES-256-CBC", "+SHA1",
1732
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
1734
# Use a fallback default, since this MUST be set.
2209
1735
priority = self.server.gnutls_priority
2210
1736
if priority is None:
2211
1737
priority = "NORMAL"
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
1738
gnutls.library.functions.gnutls_priority_set_direct(
1739
session._c_object, priority, None)
2216
1741
# Start communication using the Mandos protocol
2217
1742
# Get protocol number
2218
1743
line = self.request.makefile().readline()
2304
1830
delay -= time2 - time
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
1833
while sent_size < len(client.secret):
1835
sent = session.send(client.secret[sent_size:])
1836
except gnutls.errors.GNUTLSError as error:
1837
logger.warning("gnutls send failed",
1840
logger.debug("Sent: %d, remaining: %d", sent,
1841
len(client.secret) - (sent_size
2313
1845
logger.info("Sending secret to %s", client.name)
2314
1846
# bump the timeout using extended_timeout
2315
1847
client.bump_timeout(client.extended_timeout)
2316
1848
if self.server.use_dbus:
2317
1849
# Emit D-Bus signal
2318
1850
client.GotSecret()
2321
1853
if approval_required:
2322
1854
client.approvals_pending -= 1
2325
except gnutls.Error as error:
1857
except gnutls.errors.GNUTLSError as error:
2326
1858
logger.warning("GnuTLS bye failed",
2327
1859
exc_info=error)
2330
1862
def peer_certificate(session):
2331
1863
"Return the peer's OpenPGP certificate as a bytestring"
2332
1864
# If not an OpenPGP certificate...
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
1865
if (gnutls.library.functions.gnutls_certificate_type_get(
1867
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1868
# ...do the normal thing
1869
return session.peer_certificate
2337
1870
list_size = ctypes.c_uint(1)
2338
cert_list = (gnutls.certificate_get_peers
1871
cert_list = (gnutls.library.functions
1872
.gnutls_certificate_get_peers
2339
1873
(session._c_object, ctypes.byref(list_size)))
2340
1874
if not bool(cert_list) and list_size.value != 0:
2341
raise gnutls.Error("error getting peer certificate")
1875
raise gnutls.errors.GNUTLSError("error getting peer"
2342
1877
if list_size.value == 0:
2344
1879
cert = cert_list[0]
2345
1880
return ctypes.string_at(cert.data, cert.size)
2348
1883
def fingerprint(openpgp):
2349
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2350
1885
# New GnuTLS "datum" with the OpenPGP public key
2351
datum = gnutls.datum_t(
1886
datum = gnutls.library.types.gnutls_datum_t(
2352
1887
ctypes.cast(ctypes.c_char_p(openpgp),
2353
1888
ctypes.POINTER(ctypes.c_ubyte)),
2354
1889
ctypes.c_uint(len(openpgp)))
2355
1890
# New empty GnuTLS certificate
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
2358
1894
# Import the OpenPGP public key into the certificate
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2361
1898
# Verify the self signature in the key
2362
1899
crtverify = ctypes.c_uint()
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
2365
1902
if crtverify.value != 0:
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1904
raise gnutls.errors.CertificateSecurityError(
2368
1906
# New buffer for the fingerprint
2369
1907
buf = ctypes.create_string_buffer(20)
2370
1908
buf_len = ctypes.c_size_t()
2371
1909
# Get the fingerprint from the certificate into the buffer
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2374
1912
# Deinit the certificate
2375
gnutls.openpgp_crt_deinit(crt)
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
1914
# Convert the buffer to a Python bytestring
2377
1915
fpr = ctypes.string_at(buf, buf_len.value)
2378
1916
# Convert the bytestring to hexadecimal notation
2467
2004
# socket_wrapper(), if socketfd was set.
2468
2005
socketserver.TCPServer.__init__(self, server_address,
2469
2006
RequestHandlerClass)
2471
2008
def server_bind(self):
2472
2009
"""This overrides the normal server_bind() function
2473
2010
to bind to an interface if one was specified, and also NOT to
2474
2011
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2476
2012
if self.interface is not None:
2477
2013
if SO_BINDTODEVICE is None:
2478
# Fall back to a hard-coded value which seems to be
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2014
logger.error("SO_BINDTODEVICE does not exist;"
2015
" cannot bind to interface %s",
2019
self.socket.setsockopt(
2020
socket.SOL_SOCKET, SO_BINDTODEVICE,
2021
(self.interface + "\0").encode("utf-8"))
2022
except socket.error as error:
2023
if error.errno == errno.EPERM:
2024
logger.error("No permission to bind to"
2025
" interface %s", self.interface)
2026
elif error.errno == errno.ENOPROTOOPT:
2027
logger.error("SO_BINDTODEVICE not available;"
2028
" cannot bind to interface %s",
2030
elif error.errno == errno.ENODEV:
2031
logger.error("Interface %s does not exist,"
2032
" cannot bind", self.interface)
2499
2035
# Only bind(2) the socket if we really need to.
2500
2036
if self.server_address[0] or self.server_address[1]:
2501
2037
if not self.server_address[0]:
2502
2038
if self.address_family == socket.AF_INET6:
2503
any_address = "::" # in6addr_any
2039
any_address = "::" # in6addr_any
2505
any_address = "0.0.0.0" # INADDR_ANY
2041
any_address = "0.0.0.0" # INADDR_ANY
2506
2042
self.server_address = (any_address,
2507
2043
self.server_address[1])
2508
2044
elif not self.server_address[1]:
3063
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3064
2590
service = AvahiServiceToSyslog(
3065
name=server_settings["servicename"],
3066
servicetype="_mandos._tcp",
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
3069
2595
if server_settings["interface"]:
3070
2596
service.interface = if_nametoindex(
3071
2597
server_settings["interface"].encode("utf-8"))
3073
2599
global multiprocessing_manager
3074
2600
multiprocessing_manager = multiprocessing.Manager()
3076
2602
client_class = Client
3078
client_class = functools.partial(ClientDBus, bus=bus)
2604
client_class = functools.partial(ClientDBus, bus = bus)
3080
2606
client_settings = Client.config_parser(client_config)
3081
2607
old_client_settings = {}
3082
2608
clients_data = {}
3084
2610
# This is used to redirect stdout and stderr for checker processes
3086
wnull = open(os.devnull, "w") # A writable /dev/null
2612
wnull = open(os.devnull, "w") # A writable /dev/null
3087
2613
# Only used if server is running in foreground but not in debug
3089
2615
if debug or not foreground:
3092
2618
# Get client data and settings from last running state.
3093
2619
if server_settings["restore"]:
3095
2621
with open(stored_state_path, "rb") as stored_state:
3096
if sys.version_info.major == 2:
3097
clients_data, old_client_settings = pickle.load(
3100
bytes_clients_data, bytes_old_client_settings = (
3101
pickle.load(stored_state, encoding="bytes"))
3102
# Fix bytes to strings
3105
clients_data = {(key.decode("utf-8")
3106
if isinstance(key, bytes)
3109
bytes_clients_data.items()}
3110
del bytes_clients_data
3111
for key in clients_data:
3112
value = {(k.decode("utf-8")
3113
if isinstance(k, bytes) else k): v
3115
clients_data[key].items()}
3116
clients_data[key] = value
3118
value["client_structure"] = [
3120
if isinstance(s, bytes)
3122
value["client_structure"]]
3124
for k in ("name", "host"):
3125
if isinstance(value[k], bytes):
3126
value[k] = value[k].decode("utf-8")
3127
# old_client_settings
3129
old_client_settings = {
3130
(key.decode("utf-8")
3131
if isinstance(key, bytes)
3134
bytes_old_client_settings.items()}
3135
del bytes_old_client_settings
3137
for value in old_client_settings.values():
3138
if isinstance(value["host"], bytes):
3139
value["host"] = (value["host"]
2622
clients_data, old_client_settings = pickle.load(
3141
2624
os.remove(stored_state_path)
3142
2625
except IOError as e:
3143
2626
if e.errno == errno.ENOENT:
3243
2726
pidfilename, pid)
3245
2728
del pidfilename
3247
for termsig in (signal.SIGHUP, signal.SIGTERM):
3248
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3249
lambda: main_loop.quit() and False)
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3253
2735
@alternate_dbus_interfaces(
3254
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3255
class MandosDBusService(DBusObjectWithObjectManager):
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
3256
2738
"""A D-Bus proxy object"""
3258
2740
def __init__(self):
3259
2741
dbus.service.Object.__init__(self, bus, "/")
3261
2743
_interface = "se.recompile.Mandos"
2745
@dbus_interface_annotations(_interface)
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
3263
2751
@dbus.service.signal(_interface, signature="o")
3264
2752
def ClientAdded(self, objpath):
3268
2756
@dbus.service.signal(_interface, signature="ss")
3269
2757
def ClientNotFound(self, fingerprint, address):
3273
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
2761
@dbus.service.signal(_interface, signature="os")
3276
2762
def ClientRemoved(self, objpath, name):
3280
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
2766
@dbus.service.method(_interface, out_signature="ao")
3283
2767
def GetAllClients(self):
3285
2769
return dbus.Array(c.dbus_object_path for c in
3286
tcp_server.clients.values())
3288
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2770
tcp_server.clients.itervalues())
3290
2772
@dbus.service.method(_interface,
3291
2773
out_signature="a{oa{sv}}")
3292
2774
def GetAllClientsWithProperties(self):
3294
2776
return dbus.Dictionary(
3295
{c.dbus_object_path: c.GetAll(
3296
"se.recompile.Mandos.Client")
3297
for c in tcp_server.clients.values()},
2777
{ c.dbus_object_path: c.GetAll("")
2778
for c in tcp_server.clients.itervalues() },
3298
2779
signature="oa{sv}")
3300
2781
@dbus.service.method(_interface, in_signature="o")
3301
2782
def RemoveClient(self, object_path):
3303
for c in tcp_server.clients.values():
2784
for c in tcp_server.clients.itervalues():
3304
2785
if c.dbus_object_path == object_path:
3305
2786
del tcp_server.clients[c.name]
3306
2787
c.remove_from_connection()
3307
# Don't signal the disabling
2788
# Don't signal anything except ClientRemoved
3308
2789
c.disable(quiet=True)
3309
# Emit D-Bus signal for removal
3310
self.client_removed_signal(c)
2791
self.ClientRemoved(object_path, c.name)
3312
2793
raise KeyError(object_path)
3316
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3317
out_signature="a{oa{sa{sv}}}")
3318
def GetManagedObjects(self):
3320
return dbus.Dictionary(
3321
{client.dbus_object_path:
3323
{interface: client.GetAll(interface)
3325
client._get_all_interface_names()})
3326
for client in tcp_server.clients.values()})
3328
def client_added_signal(self, client):
3329
"""Send the new standard signal and the old signal"""
3331
# New standard signal
3332
self.InterfacesAdded(
3333
client.dbus_object_path,
3335
{interface: client.GetAll(interface)
3337
client._get_all_interface_names()}))
3339
self.ClientAdded(client.dbus_object_path)
3341
def client_removed_signal(self, client):
3342
"""Send the new standard signal and the old signal"""
3344
# New standard signal
3345
self.InterfacesRemoved(
3346
client.dbus_object_path,
3347
client._get_all_interface_names())
3349
self.ClientRemoved(client.dbus_object_path,
3352
2797
mandos_dbus_service = MandosDBusService()
3354
# Save modules to variables to exempt the modules from being
3355
# unloaded before the function registered with atexit() is run.
3356
mp = multiprocessing
3360
2800
"Cleanup function; run on exit"
3362
2802
service.cleanup()
3364
mp.active_children()
2804
multiprocessing.active_children()
3366
2806
if not (tcp_server.clients or client_settings):
3369
2809
# Store client before exiting. Secrets are encrypted with key
3370
2810
# based on what config file has. If config file is
3371
2811
# removed/edited, old secret will thus be unrecovable.
3373
2813
with PGPEngine() as pgp:
3374
for client in tcp_server.clients.values():
2814
for client in tcp_server.clients.itervalues():
3375
2815
key = client_settings[client.name]["secret"]
3376
2816
client.encrypted_secret = pgp.encrypt(client.secret,
3378
2818
client_dict = {}
3380
2820
# A list of attributes that can not be pickled
3382
exclude = {"bus", "changedstate", "secret",
3383
"checker", "server_settings"}
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
3384
2824
for name, typ in inspect.getmembers(dbus.service
3386
2826
exclude.add(name)
3388
2828
client_dict["encrypted_secret"] = (client
3389
2829
.encrypted_secret)
3390
2830
for attr in client.client_structure:
3391
2831
if attr not in exclude:
3392
2832
client_dict[attr] = getattr(client, attr)
3394
2834
clients[client.name] = client_dict
3395
2835
del client_settings[client.name]["secret"]
3398
2838
with tempfile.NamedTemporaryFile(