248
195
.replace(b"\n", b"\\n")
249
196
.replace(b"\0", b"\\x00"))
252
199
def encrypt(self, data, password):
253
200
passphrase = self.password_encode(password)
254
201
with tempfile.NamedTemporaryFile(
255
202
dir=self.tempdir) as passfile:
256
203
passfile.write(passphrase)
258
proc = subprocess.Popen([self.gpg, '--symmetric',
205
proc = subprocess.Popen(['gpg', '--symmetric',
259
206
'--passphrase-file',
261
208
+ self.gnupgargs,
262
stdin=subprocess.PIPE,
263
stdout=subprocess.PIPE,
264
stderr=subprocess.PIPE)
265
ciphertext, err = proc.communicate(input=data)
209
stdin = subprocess.PIPE,
210
stdout = subprocess.PIPE,
211
stderr = subprocess.PIPE)
212
ciphertext, err = proc.communicate(input = data)
266
213
if proc.returncode != 0:
267
214
raise PGPError(err)
268
215
return ciphertext
270
217
def decrypt(self, data, password):
271
218
passphrase = self.password_encode(password)
272
219
with tempfile.NamedTemporaryFile(
273
dir=self.tempdir) as passfile:
220
dir = self.tempdir) as passfile:
274
221
passfile.write(passphrase)
276
proc = subprocess.Popen([self.gpg, '--decrypt',
223
proc = subprocess.Popen(['gpg', '--decrypt',
277
224
'--passphrase-file',
279
226
+ self.gnupgargs,
280
stdin=subprocess.PIPE,
281
stdout=subprocess.PIPE,
282
stderr=subprocess.PIPE)
283
decrypted_plaintext, err = proc.communicate(input=data)
227
stdin = subprocess.PIPE,
228
stdout = subprocess.PIPE,
229
stderr = subprocess.PIPE)
230
decrypted_plaintext, err = proc.communicate(input = data)
284
231
if proc.returncode != 0:
285
232
raise PGPError(err)
286
233
return decrypted_plaintext
289
# Pretend that we have an Avahi module
291
"""This isn't so much a class as it is a module-like namespace."""
292
IF_UNSPEC = -1 # avahi-common/address.h
293
PROTO_UNSPEC = -1 # avahi-common/address.h
294
PROTO_INET = 0 # avahi-common/address.h
295
PROTO_INET6 = 1 # avahi-common/address.h
296
DBUS_NAME = "org.freedesktop.Avahi"
297
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
298
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
299
DBUS_PATH_SERVER = "/"
302
def string_array_to_txt_array(t):
303
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
304
for s in t), signature="ay")
305
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
306
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
307
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
308
SERVER_INVALID = 0 # avahi-common/defs.h
309
SERVER_REGISTERING = 1 # avahi-common/defs.h
310
SERVER_RUNNING = 2 # avahi-common/defs.h
311
SERVER_COLLISION = 3 # avahi-common/defs.h
312
SERVER_FAILURE = 4 # avahi-common/defs.h
315
236
class AvahiError(Exception):
316
237
def __init__(self, value, *args, **kwargs):
317
238
self.value = value
507
417
class AvahiServiceToSyslog(AvahiService):
508
418
def rename(self, *args, **kwargs):
509
419
"""Add the new name to the syslog messages"""
510
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
420
ret = AvahiService.rename(self, *args, **kwargs)
511
421
syslogger.setFormatter(logging.Formatter(
512
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
513
423
.format(self.name)))
517
# Pretend that we have a GnuTLS module
519
"""This isn't so much a class as it is a module-like namespace."""
521
library = ctypes.util.find_library("gnutls")
523
library = ctypes.util.find_library("gnutls-deb0")
524
_library = ctypes.cdll.LoadLibrary(library)
527
# Unless otherwise indicated, the constants and types below are
528
# all from the gnutls/gnutls.h C header file.
539
E_NO_CERTIFICATE_FOUND = -49
544
KEYID_USE_SHA256 = 1 # gnutls/x509.h
545
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
548
class session_int(ctypes.Structure):
550
session_t = ctypes.POINTER(session_int)
552
class certificate_credentials_st(ctypes.Structure):
554
certificate_credentials_t = ctypes.POINTER(
555
certificate_credentials_st)
556
certificate_type_t = ctypes.c_int
558
class datum_t(ctypes.Structure):
559
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
560
('size', ctypes.c_uint)]
562
class openpgp_crt_int(ctypes.Structure):
564
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
565
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
566
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
567
credentials_type_t = ctypes.c_int
568
transport_ptr_t = ctypes.c_void_p
569
close_request_t = ctypes.c_int
572
class Error(Exception):
573
def __init__(self, message=None, code=None, args=()):
574
# Default usage is by a message string, but if a return
575
# code is passed, convert it to a string with
578
if message is None and code is not None:
579
message = gnutls.strerror(code)
580
return super(gnutls.Error, self).__init__(
583
class CertificateSecurityError(Error):
589
self._c_object = gnutls.certificate_credentials_t()
590
gnutls.certificate_allocate_credentials(
591
ctypes.byref(self._c_object))
592
self.type = gnutls.CRD_CERTIFICATE
595
gnutls.certificate_free_credentials(self._c_object)
598
def __init__(self, socket, credentials=None):
599
self._c_object = gnutls.session_t()
600
gnutls_flags = gnutls.CLIENT
601
if gnutls.check_version(b"3.5.6"):
602
gnutls_flags |= gnutls.NO_TICKETS
604
gnutls_flags |= gnutls.ENABLE_RAWPK
605
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
607
gnutls.set_default_priority(self._c_object)
608
gnutls.transport_set_ptr(self._c_object, socket.fileno())
609
gnutls.handshake_set_private_extensions(self._c_object,
612
if credentials is None:
613
credentials = gnutls.Credentials()
614
gnutls.credentials_set(self._c_object, credentials.type,
615
ctypes.cast(credentials._c_object,
617
self.credentials = credentials
620
gnutls.deinit(self._c_object)
623
return gnutls.handshake(self._c_object)
625
def send(self, data):
629
data_len -= gnutls.record_send(self._c_object,
634
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
636
# Error handling functions
637
def _error_code(result):
638
"""A function to raise exceptions on errors, suitable
639
for the 'restype' attribute on ctypes functions"""
642
if result == gnutls.E_NO_CERTIFICATE_FOUND:
643
raise gnutls.CertificateSecurityError(code=result)
644
raise gnutls.Error(code=result)
646
def _retry_on_error(result, func, arguments):
647
"""A function to retry on some errors, suitable
648
for the 'errcheck' attribute on ctypes functions"""
650
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
651
return _error_code(result)
652
result = func(*arguments)
655
# Unless otherwise indicated, the function declarations below are
656
# all from the gnutls/gnutls.h C header file.
659
priority_set_direct = _library.gnutls_priority_set_direct
660
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
661
ctypes.POINTER(ctypes.c_char_p)]
662
priority_set_direct.restype = _error_code
664
init = _library.gnutls_init
665
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
666
init.restype = _error_code
668
set_default_priority = _library.gnutls_set_default_priority
669
set_default_priority.argtypes = [session_t]
670
set_default_priority.restype = _error_code
672
record_send = _library.gnutls_record_send
673
record_send.argtypes = [session_t, ctypes.c_void_p,
675
record_send.restype = ctypes.c_ssize_t
676
record_send.errcheck = _retry_on_error
678
certificate_allocate_credentials = (
679
_library.gnutls_certificate_allocate_credentials)
680
certificate_allocate_credentials.argtypes = [
681
ctypes.POINTER(certificate_credentials_t)]
682
certificate_allocate_credentials.restype = _error_code
684
certificate_free_credentials = (
685
_library.gnutls_certificate_free_credentials)
686
certificate_free_credentials.argtypes = [
687
certificate_credentials_t]
688
certificate_free_credentials.restype = None
690
handshake_set_private_extensions = (
691
_library.gnutls_handshake_set_private_extensions)
692
handshake_set_private_extensions.argtypes = [session_t,
694
handshake_set_private_extensions.restype = None
696
credentials_set = _library.gnutls_credentials_set
697
credentials_set.argtypes = [session_t, credentials_type_t,
699
credentials_set.restype = _error_code
701
strerror = _library.gnutls_strerror
702
strerror.argtypes = [ctypes.c_int]
703
strerror.restype = ctypes.c_char_p
705
certificate_type_get = _library.gnutls_certificate_type_get
706
certificate_type_get.argtypes = [session_t]
707
certificate_type_get.restype = _error_code
709
certificate_get_peers = _library.gnutls_certificate_get_peers
710
certificate_get_peers.argtypes = [session_t,
711
ctypes.POINTER(ctypes.c_uint)]
712
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
global_set_log_level = _library.gnutls_global_set_log_level
715
global_set_log_level.argtypes = [ctypes.c_int]
716
global_set_log_level.restype = None
718
global_set_log_function = _library.gnutls_global_set_log_function
719
global_set_log_function.argtypes = [log_func]
720
global_set_log_function.restype = None
722
deinit = _library.gnutls_deinit
723
deinit.argtypes = [session_t]
724
deinit.restype = None
726
handshake = _library.gnutls_handshake
727
handshake.argtypes = [session_t]
728
handshake.restype = _error_code
729
handshake.errcheck = _retry_on_error
731
transport_set_ptr = _library.gnutls_transport_set_ptr
732
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
733
transport_set_ptr.restype = None
735
bye = _library.gnutls_bye
736
bye.argtypes = [session_t, close_request_t]
737
bye.restype = _error_code
738
bye.errcheck = _retry_on_error
740
check_version = _library.gnutls_check_version
741
check_version.argtypes = [ctypes.c_char_p]
742
check_version.restype = ctypes.c_char_p
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
754
class pubkey_st(ctypes.Structure):
756
pubkey_t = ctypes.POINTER(pubkey_st)
758
x509_crt_fmt_t = ctypes.c_int
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
pubkey_import.restype = _error_code
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
780
# All the function declarations below are from gnutls/openpgp.h
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
790
openpgp_crt_import.restype = _error_code
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
807
openpgp_crt_get_fingerprint.restype = _error_code
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
certificate_type_get2.restype = _error_code
814
# Remove non-public functions
815
del _error_code, _retry_on_error
818
def call_pipe(connection, # : multiprocessing.Connection
819
func, *args, **kwargs):
426
def subprocess_call_pipe(connection, # : multiprocessing.Connection
820
428
"""This function is meant to be called by multiprocessing.Process
822
This function runs func(*args, **kwargs), and writes the resulting
823
return value on the provided multiprocessing.Connection.
430
This function runs a synchronous subprocess.call(), and writes the
431
resulting return code on the provided multiprocessing.Connection.
825
connection.send(func(*args, **kwargs))
433
connection.send(subprocess.call(*args, **kwargs))
826
434
connection.close()
436
class Client(object):
830
437
"""A representation of a client host served by this server.
833
440
approved: bool(); 'None' if not yet approved/disapproved
834
441
approval_delay: datetime.timedelta(); Time to wait for approval
835
442
approval_duration: datetime.timedelta(); Duration of one approval
836
checker: multiprocessing.Process(); a running checker process used
837
to see if the client lives. 'None' if no process is
839
checker_callback_tag: a GLib event source tag, or None
443
checker: subprocess.Popen(); a running checker process used
444
to see if the client lives.
445
'None' if no process is running.
446
checker_callback_tag: a gobject event source tag, or None
840
447
checker_command: string; External command which is run to check
841
448
if client lives. %() expansions are done at
842
449
runtime with vars(self) as dict, so that for
843
450
instance %(name)s can be used in the command.
844
checker_initiator_tag: a GLib event source tag, or None
451
checker_initiator_tag: a gobject event source tag, or None
845
452
created: datetime.datetime(); (UTC) object creation
846
453
client_structure: Object describing what attributes a client has
847
454
and is used for storing the client at exit
848
455
current_checker_command: string; current running checker_command
849
disable_initiator_tag: a GLib event source tag, or None
456
disable_initiator_tag: a gobject event source tag, or None
851
458
fingerprint: string (40 or 32 hexadecimal digits); used to
852
uniquely identify an OpenPGP client
853
key_id: string (64 hexadecimal digits); used to uniquely identify
854
a client using raw public keys
459
uniquely identify the client
855
460
host: string; available for use by the checker command
856
461
interval: datetime.timedelta(); How often to start a new checker
857
462
last_approval_request: datetime.datetime(); (UTC) or None
1287
882
for cls in self.__class__.__mro__
1288
883
for name, athing in
1289
884
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1291
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1293
path_keyword='object_path',
1294
connection_keyword='connection')
1295
def Introspect(self, object_path, connection):
1296
"""Overloading of standard D-Bus method.
1298
Inserts annotation tags on methods and signals.
1300
xmlstring = dbus.service.Object.Introspect(self, object_path,
1303
document = xml.dom.minidom.parseString(xmlstring)
1305
for if_tag in document.getElementsByTagName("interface"):
1306
# Add annotation tags
1307
for typ in ("method", "signal"):
1308
for tag in if_tag.getElementsByTagName(typ):
1310
for name, prop in (self.
1311
_get_all_dbus_things(typ)):
1312
if (name == tag.getAttribute("name")
1313
and prop._dbus_interface
1314
== if_tag.getAttribute("name")):
1315
annots.update(getattr(
1316
prop, "_dbus_annotations", {}))
1317
for name, value in annots.items():
1318
ann_tag = document.createElement(
1320
ann_tag.setAttribute("name", name)
1321
ann_tag.setAttribute("value", value)
1322
tag.appendChild(ann_tag)
1323
# Add interface annotation tags
1324
for annotation, value in dict(
1325
itertools.chain.from_iterable(
1326
annotations().items()
1327
for name, annotations
1328
in self._get_all_dbus_things("interface")
1329
if name == if_tag.getAttribute("name")
1331
ann_tag = document.createElement("annotation")
1332
ann_tag.setAttribute("name", annotation)
1333
ann_tag.setAttribute("value", value)
1334
if_tag.appendChild(ann_tag)
1335
# Fix argument name for the Introspect method itself
1336
if (if_tag.getAttribute("name")
1337
== dbus.INTROSPECTABLE_IFACE):
1338
for cn in if_tag.getElementsByTagName("method"):
1339
if cn.getAttribute("name") == "Introspect":
1340
for arg in cn.getElementsByTagName("arg"):
1341
if (arg.getAttribute("direction")
1343
arg.setAttribute("name",
1345
xmlstring = document.toxml("utf-8")
1347
except (AttributeError, xml.dom.DOMException,
1348
xml.parsers.expat.ExpatError) as error:
1349
logger.error("Failed to override Introspection method",
1354
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1355
"""A D-Bus object with properties.
1357
Classes inheriting from this can use the dbus_service_property
1358
decorator to expose methods as D-Bus properties. It exposes the
1359
standard Get(), Set(), and GetAll() methods on the D-Bus.
1362
886
def _get_dbus_property(self, interface_name, property_name):
1363
887
"""Returns a bound method if one exists which is a D-Bus
1364
888
property with the specified name and interface.
1518
1046
return xmlstring
1522
dbus.OBJECT_MANAGER_IFACE
1523
except AttributeError:
1524
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1528
"""A D-Bus object with an ObjectManager.
1530
Classes inheriting from this exposes the standard
1531
GetManagedObjects call and the InterfacesAdded and
1532
InterfacesRemoved signals on the standard
1533
"org.freedesktop.DBus.ObjectManager" interface.
1535
Note: No signals are sent automatically; they must be sent
1538
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1539
out_signature="a{oa{sa{sv}}}")
1540
def GetManagedObjects(self):
1541
"""This function must be overridden"""
1542
raise NotImplementedError()
1544
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1545
signature="oa{sa{sv}}")
1546
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1550
def InterfacesRemoved(self, object_path, interfaces):
1553
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1557
def Introspect(self, object_path, connection):
1558
"""Overloading of standard D-Bus method.
1560
Override return argument name of GetManagedObjects to be
1561
"objpath_interfaces_and_properties"
1563
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1567
document = xml.dom.minidom.parseString(xmlstring)
1569
for if_tag in document.getElementsByTagName("interface"):
1570
# Fix argument name for the GetManagedObjects method
1571
if (if_tag.getAttribute("name")
1572
== dbus.OBJECT_MANAGER_IFACE):
1573
for cn in if_tag.getElementsByTagName("method"):
1574
if (cn.getAttribute("name")
1575
== "GetManagedObjects"):
1576
for arg in cn.getElementsByTagName("arg"):
1577
if (arg.getAttribute("direction")
1581
"objpath_interfaces"
1583
xmlstring = document.toxml("utf-8")
1585
except (AttributeError, xml.dom.DOMException,
1586
xml.parsers.expat.ExpatError) as error:
1587
logger.error("Failed to override Introspection method",
1592
1049
def datetime_to_dbus(dt, variant_level=0):
1593
1050
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1595
return dbus.String("", variant_level=variant_level)
1052
return dbus.String("", variant_level = variant_level)
1596
1053
return dbus.String(dt.isoformat(), variant_level=variant_level)
2380
1805
delay -= time2 - time
2383
session.send(client.secret)
2384
except gnutls.Error as error:
2385
logger.warning("gnutls send failed",
1808
while sent_size < len(client.secret):
1810
sent = session.send(client.secret[sent_size:])
1811
except gnutls.errors.GNUTLSError as error:
1812
logger.warning("gnutls send failed",
1815
logger.debug("Sent: %d, remaining: %d", sent,
1816
len(client.secret) - (sent_size
2389
1820
logger.info("Sending secret to %s", client.name)
2390
1821
# bump the timeout using extended_timeout
2391
1822
client.bump_timeout(client.extended_timeout)
2392
1823
if self.server.use_dbus:
2393
1824
# Emit D-Bus signal
2394
1825
client.GotSecret()
2397
1828
if approval_required:
2398
1829
client.approvals_pending -= 1
2401
except gnutls.Error as error:
1832
except gnutls.errors.GNUTLSError as error:
2402
1833
logger.warning("GnuTLS bye failed",
2403
1834
exc_info=error)
2406
1837
def peer_certificate(session):
2407
"Return the peer's certificate as a bytestring"
2409
cert_type = gnutls.certificate_type_get2(session._c_object,
2411
except AttributeError:
2412
cert_type = gnutls.certificate_type_get(session._c_object)
2413
if gnutls.has_rawpk:
2414
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2416
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2417
# If not a valid certificate type...
2418
if cert_type not in valid_cert_types:
2419
logger.info("Cert type %r not in %r", cert_type,
2421
# ...return invalid data
1838
"Return the peer's OpenPGP certificate as a bytestring"
1839
# If not an OpenPGP certificate...
1840
if (gnutls.library.functions.gnutls_certificate_type_get(
1842
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1843
# ...do the normal thing
1844
return session.peer_certificate
2423
1845
list_size = ctypes.c_uint(1)
2424
cert_list = (gnutls.certificate_get_peers
1846
cert_list = (gnutls.library.functions
1847
.gnutls_certificate_get_peers
2425
1848
(session._c_object, ctypes.byref(list_size)))
2426
1849
if not bool(cert_list) and list_size.value != 0:
2427
raise gnutls.Error("error getting peer certificate")
1850
raise gnutls.errors.GNUTLSError("error getting peer"
2428
1852
if list_size.value == 0:
2430
1854
cert = cert_list[0]
2431
1855
return ctypes.string_at(cert.data, cert.size)
2434
def key_id(certificate):
2435
"Convert a certificate bytestring to a hexdigit key ID"
2436
# New GnuTLS "datum" with the public key
2437
datum = gnutls.datum_t(
2438
ctypes.cast(ctypes.c_char_p(certificate),
2439
ctypes.POINTER(ctypes.c_ubyte)),
2440
ctypes.c_uint(len(certificate)))
2441
# XXX all these need to be created in the gnutls "module"
2442
# New empty GnuTLS certificate
2443
pubkey = gnutls.pubkey_t()
2444
gnutls.pubkey_init(ctypes.byref(pubkey))
2445
# Import the raw public key into the certificate
2446
gnutls.pubkey_import(pubkey,
2447
ctypes.byref(datum),
2448
gnutls.X509_FMT_DER)
2449
# New buffer for the key ID
2450
buf = ctypes.create_string_buffer(32)
2451
buf_len = ctypes.c_size_t(len(buf))
2452
# Get the key ID from the raw public key into the buffer
2453
gnutls.pubkey_get_key_id(pubkey,
2454
gnutls.KEYID_USE_SHA256,
2455
ctypes.cast(ctypes.byref(buf),
2456
ctypes.POINTER(ctypes.c_ubyte)),
2457
ctypes.byref(buf_len))
2458
# Deinit the certificate
2459
gnutls.pubkey_deinit(pubkey)
2461
# Convert the buffer to a Python bytestring
2462
key_id = ctypes.string_at(buf, buf_len.value)
2463
# Convert the bytestring to hexadecimal notation
2464
hex_key_id = binascii.hexlify(key_id).upper()
2468
1858
def fingerprint(openpgp):
2469
1859
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2470
1860
# New GnuTLS "datum" with the OpenPGP public key
2471
datum = gnutls.datum_t(
1861
datum = gnutls.library.types.gnutls_datum_t(
2472
1862
ctypes.cast(ctypes.c_char_p(openpgp),
2473
1863
ctypes.POINTER(ctypes.c_ubyte)),
2474
1864
ctypes.c_uint(len(openpgp)))
2475
1865
# New empty GnuTLS certificate
2476
crt = gnutls.openpgp_crt_t()
2477
gnutls.openpgp_crt_init(ctypes.byref(crt))
1866
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1867
gnutls.library.functions.gnutls_openpgp_crt_init(
2478
1869
# Import the OpenPGP public key into the certificate
2479
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2480
gnutls.OPENPGP_FMT_RAW)
1870
gnutls.library.functions.gnutls_openpgp_crt_import(
1871
crt, ctypes.byref(datum),
1872
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2481
1873
# Verify the self signature in the key
2482
1874
crtverify = ctypes.c_uint()
2483
gnutls.openpgp_crt_verify_self(crt, 0,
2484
ctypes.byref(crtverify))
1875
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1876
crt, 0, ctypes.byref(crtverify))
2485
1877
if crtverify.value != 0:
2486
gnutls.openpgp_crt_deinit(crt)
2487
raise gnutls.CertificateSecurityError(code
1878
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
raise gnutls.errors.CertificateSecurityError(
2489
1881
# New buffer for the fingerprint
2490
1882
buf = ctypes.create_string_buffer(20)
2491
1883
buf_len = ctypes.c_size_t()
2492
1884
# Get the fingerprint from the certificate into the buffer
2493
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2494
ctypes.byref(buf_len))
1885
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1886
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2495
1887
# Deinit the certificate
2496
gnutls.openpgp_crt_deinit(crt)
1888
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2497
1889
# Convert the buffer to a Python bytestring
2498
1890
fpr = ctypes.string_at(buf, buf_len.value)
2499
1891
# Convert the bytestring to hexadecimal notation
2588
1979
# socket_wrapper(), if socketfd was set.
2589
1980
socketserver.TCPServer.__init__(self, server_address,
2590
1981
RequestHandlerClass)
2592
1983
def server_bind(self):
2593
1984
"""This overrides the normal server_bind() function
2594
1985
to bind to an interface if one was specified, and also NOT to
2595
1986
bind to an address or port if they were not specified."""
2596
global SO_BINDTODEVICE
2597
1987
if self.interface is not None:
2598
1988
if SO_BINDTODEVICE is None:
2599
# Fall back to a hard-coded value which seems to be
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" cannot bind", self.interface)
1989
logger.error("SO_BINDTODEVICE does not exist;"
1990
" cannot bind to interface %s",
1994
self.socket.setsockopt(
1995
socket.SOL_SOCKET, SO_BINDTODEVICE,
1996
(self.interface + "\0").encode("utf-8"))
1997
except socket.error as error:
1998
if error.errno == errno.EPERM:
1999
logger.error("No permission to bind to"
2000
" interface %s", self.interface)
2001
elif error.errno == errno.ENOPROTOOPT:
2002
logger.error("SO_BINDTODEVICE not available;"
2003
" cannot bind to interface %s",
2005
elif error.errno == errno.ENODEV:
2006
logger.error("Interface %s does not exist,"
2007
" cannot bind", self.interface)
2620
2010
# Only bind(2) the socket if we really need to.
2621
2011
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
2624
2012
if not self.server_address[0]:
2625
2013
if self.address_family == socket.AF_INET6:
2626
any_address = "::" # in6addr_any
2014
any_address = "::" # in6addr_any
2628
any_address = "0.0.0.0" # INADDR_ANY
2016
any_address = "0.0.0.0" # INADDR_ANY
2629
2017
self.server_address = (any_address,
2630
2018
self.server_address[1])
2631
2019
elif not self.server_address[1]:
2665
2053
self.gnutls_priority = gnutls_priority
2666
2054
IPv6_TCPServer.__init__(self, server_address,
2667
2055
RequestHandlerClass,
2668
interface=interface,
2056
interface = interface,
2057
use_ipv6 = use_ipv6,
2058
socketfd = socketfd)
2672
2060
def server_activate(self):
2673
2061
if self.enabled:
2674
2062
return socketserver.TCPServer.server_activate(self)
2676
2064
def enable(self):
2677
2065
self.enabled = True
2679
2067
def add_pipe(self, parent_pipe, proc):
2680
2068
# Call "handle_ipc" for both data and EOF events
2682
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2683
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2069
gobject.io_add_watch(
2070
parent_pipe.fileno(),
2071
gobject.IO_IN | gobject.IO_HUP,
2684
2072
functools.partial(self.handle_ipc,
2685
parent_pipe=parent_pipe,
2073
parent_pipe = parent_pipe,
2688
2076
def handle_ipc(self, source, condition,
2689
2077
parent_pipe=None,
2691
2079
client_object=None):
2692
2080
# error, or the other end of multiprocessing.Pipe has closed
2693
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2081
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2694
2082
# Wait for other process to exit
2698
2086
# Read a request from the child
2699
2087
request = parent_pipe.recv()
2700
2088
command = request[0]
2702
2090
if command == 'init':
2703
key_id = request[1].decode("ascii")
2704
fpr = request[2].decode("ascii")
2705
address = request[3]
2707
for c in self.clients.values():
2708
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2710
if key_id and c.key_id == key_id:
2713
if fpr and c.fingerprint == fpr:
2092
address = request[2]
2094
for c in self.clients.itervalues():
2095
if c.fingerprint == fpr:
2717
logger.info("Client not found for key ID: %s, address"
2718
": %s", key_id or fpr, address)
2099
logger.info("Client not found for fingerprint: %s, ad"
2100
"dress: %s", fpr, address)
2719
2101
if self.use_dbus:
2720
2102
# Emit D-Bus signal
2721
mandos_dbus_service.ClientNotFound(key_id or fpr,
2103
mandos_dbus_service.ClientNotFound(fpr,
2723
2105
parent_pipe.send(False)
2727
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2728
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2108
gobject.io_add_watch(
2109
parent_pipe.fileno(),
2110
gobject.IO_IN | gobject.IO_HUP,
2729
2111
functools.partial(self.handle_ipc,
2730
parent_pipe=parent_pipe,
2732
client_object=client))
2112
parent_pipe = parent_pipe,
2114
client_object = client))
2733
2115
parent_pipe.send(True)
2734
2116
# remove the old hook in favor of the new above hook on
2738
2120
funcname = request[1]
2739
2121
args = request[2]
2740
2122
kwargs = request[3]
2742
2124
parent_pipe.send(('data', getattr(client_object,
2743
2125
funcname)(*args,
2746
2128
if command == 'getattr':
2747
2129
attrname = request[1]
2748
if isinstance(client_object.__getattribute__(attrname),
2749
collections.Callable):
2130
if callable(client_object.__getattribute__(attrname)):
2750
2131
parent_pipe.send(('function', ))
2752
2133
parent_pipe.send((
2753
2134
'data', client_object.__getattribute__(attrname)))
2755
2136
if command == 'setattr':
2756
2137
attrname = request[1]
2757
2138
value = request[2]
2758
2139
setattr(client_object, attrname, value)
2763
2144
def rfc3339_duration_to_delta(duration):
2764
2145
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2766
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2768
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2770
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2772
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2774
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2776
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2778
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2147
>>> rfc3339_duration_to_delta("P7D")
2148
datetime.timedelta(7)
2149
>>> rfc3339_duration_to_delta("PT60S")
2150
datetime.timedelta(0, 60)
2151
>>> rfc3339_duration_to_delta("PT60M")
2152
datetime.timedelta(0, 3600)
2153
>>> rfc3339_duration_to_delta("PT24H")
2154
datetime.timedelta(1)
2155
>>> rfc3339_duration_to_delta("P1W")
2156
datetime.timedelta(7)
2157
>>> rfc3339_duration_to_delta("PT5M30S")
2158
datetime.timedelta(0, 330)
2159
>>> rfc3339_duration_to_delta("P1DT3M20S")
2160
datetime.timedelta(1, 200)
2782
2163
# Parsing an RFC 3339 duration with regular expressions is not
2783
2164
# possible - there would have to be multiple places for the same
2784
2165
# values, like seconds. The current code, while more esoteric, is
2785
2166
# cleaner without depending on a parsing library. If Python had a
2786
2167
# built-in library for parsing we would use it, but we'd like to
2787
2168
# avoid excessive use of external libraries.
2789
2170
# New type for defining tokens, syntax, and semantics all-in-one
2171
Token = collections.namedtuple("Token",
2172
("regexp", # To match token; if
2173
# "value" is not None,
2174
# must have a "group"
2176
"value", # datetime.timedelta or
2178
"followers")) # Tokens valid after
2790
2180
Token = collections.namedtuple("Token", (
2791
2181
"regexp", # To match token; if "value" is not None, must have
2792
2182
# a "group" containing digits
3192
2571
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
2572
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
2573
name = server_settings["servicename"],
2574
servicetype = "_mandos._tcp",
2575
protocol = protocol,
3198
2577
if server_settings["interface"]:
3199
2578
service.interface = if_nametoindex(
3200
2579
server_settings["interface"].encode("utf-8"))
3202
2581
global multiprocessing_manager
3203
2582
multiprocessing_manager = multiprocessing.Manager()
3205
2584
client_class = Client
3207
client_class = functools.partial(ClientDBus, bus=bus)
2586
client_class = functools.partial(ClientDBus, bus = bus)
3209
2588
client_settings = Client.config_parser(client_config)
3210
2589
old_client_settings = {}
3211
2590
clients_data = {}
3213
2592
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
2594
wnull = open(os.devnull, "w") # A writable /dev/null
3216
2595
# Only used if server is running in foreground but not in debug
3218
2597
if debug or not foreground:
3221
2600
# Get client data and settings from last running state.
3222
2601
if server_settings["restore"]:
3224
2603
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host and .checker_command
3270
for value in old_client_settings.values():
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
2604
clients_data, old_client_settings = pickle.load(
3275
2606
os.remove(stored_state_path)
3276
2607
except IOError as e:
3277
2608
if e.errno == errno.ENOENT:
3355
2686
for client_name in (set(client_settings)
3356
2687
- set(old_client_settings)):
3357
2688
clients_data[client_name] = client_settings[client_name]
3359
2690
# Create all client objects
3360
2691
for client_name, client in clients_data.items():
3361
2692
tcp_server.clients[client_name] = client_class(
3364
server_settings=server_settings)
2695
server_settings = server_settings)
3366
2697
if not tcp_server.clients:
3367
2698
logger.warning("No clients defined")
3369
2700
if not foreground:
3370
2701
if pidfile is not None:
3374
print(pid, file=pidfile)
2705
pidfile.write("{}\n".format(pid).encode("utf-8"))
3375
2706
except IOError:
3376
2707
logger.error("Could not write to file %r with PID %d",
3377
2708
pidfilename, pid)
3379
2710
del pidfilename
3381
for termsig in (signal.SIGHUP, signal.SIGTERM):
3382
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3383
lambda: main_loop.quit() and False)
2712
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2713
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3387
2717
@alternate_dbus_interfaces(
3388
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3389
class MandosDBusService(DBusObjectWithObjectManager):
2718
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2719
class MandosDBusService(DBusObjectWithProperties):
3390
2720
"""A D-Bus proxy object"""
3392
2722
def __init__(self):
3393
2723
dbus.service.Object.__init__(self, bus, "/")
3395
2725
_interface = "se.recompile.Mandos"
2727
@dbus_interface_annotations(_interface)
2730
"org.freedesktop.DBus.Property.EmitsChangedSignal":
3397
2733
@dbus.service.signal(_interface, signature="o")
3398
2734
def ClientAdded(self, objpath):
3402
2738
@dbus.service.signal(_interface, signature="ss")
3403
def ClientNotFound(self, key_id, address):
2739
def ClientNotFound(self, fingerprint, address):
3407
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3409
2743
@dbus.service.signal(_interface, signature="os")
3410
2744
def ClientRemoved(self, objpath, name):
3414
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3416
2748
@dbus.service.method(_interface, out_signature="ao")
3417
2749
def GetAllClients(self):
3419
2751
return dbus.Array(c.dbus_object_path for c in
3420
tcp_server.clients.values())
3422
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2752
tcp_server.clients.itervalues())
3424
2754
@dbus.service.method(_interface,
3425
2755
out_signature="a{oa{sv}}")
3426
2756
def GetAllClientsWithProperties(self):
3428
2758
return dbus.Dictionary(
3429
{c.dbus_object_path: c.GetAll(
3430
"se.recompile.Mandos.Client")
3431
for c in tcp_server.clients.values()},
2759
{ c.dbus_object_path: c.GetAll("")
2760
for c in tcp_server.clients.itervalues() },
3432
2761
signature="oa{sv}")
3434
2763
@dbus.service.method(_interface, in_signature="o")
3435
2764
def RemoveClient(self, object_path):
3437
for c in tcp_server.clients.values():
2766
for c in tcp_server.clients.itervalues():
3438
2767
if c.dbus_object_path == object_path:
3439
2768
del tcp_server.clients[c.name]
3440
2769
c.remove_from_connection()
3441
# Don't signal the disabling
2770
# Don't signal anything except ClientRemoved
3442
2771
c.disable(quiet=True)
3443
# Emit D-Bus signal for removal
3444
self.client_removed_signal(c)
2773
self.ClientRemoved(object_path, c.name)
3446
2775
raise KeyError(object_path)
3450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3451
out_signature="a{oa{sa{sv}}}")
3452
def GetManagedObjects(self):
3454
return dbus.Dictionary(
3455
{client.dbus_object_path:
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()})
3460
for client in tcp_server.clients.values()})
3462
def client_added_signal(self, client):
3463
"""Send the new standard signal and the old signal"""
3465
# New standard signal
3466
self.InterfacesAdded(
3467
client.dbus_object_path,
3469
{interface: client.GetAll(interface)
3471
client._get_all_interface_names()}))
3473
self.ClientAdded(client.dbus_object_path)
3475
def client_removed_signal(self, client):
3476
"""Send the new standard signal and the old signal"""
3478
# New standard signal
3479
self.InterfacesRemoved(
3480
client.dbus_object_path,
3481
client._get_all_interface_names())
3483
self.ClientRemoved(client.dbus_object_path,
3486
2779
mandos_dbus_service = MandosDBusService()
3488
# Save modules to variables to exempt the modules from being
3489
# unloaded before the function registered with atexit() is run.
3490
mp = multiprocessing
3494
2782
"Cleanup function; run on exit"
3496
2784
service.cleanup()
3498
mp.active_children()
2786
multiprocessing.active_children()
3500
2788
if not (tcp_server.clients or client_settings):
3503
2791
# Store client before exiting. Secrets are encrypted with key
3504
2792
# based on what config file has. If config file is
3505
2793
# removed/edited, old secret will thus be unrecovable.
3507
2795
with PGPEngine() as pgp:
3508
for client in tcp_server.clients.values():
2796
for client in tcp_server.clients.itervalues():
3509
2797
key = client_settings[client.name]["secret"]
3510
2798
client.encrypted_secret = pgp.encrypt(client.secret,
3512
2800
client_dict = {}
3514
2802
# A list of attributes that can not be pickled
3516
exclude = {"bus", "changedstate", "secret",
3517
"checker", "server_settings"}
2804
exclude = { "bus", "changedstate", "secret",
2805
"checker", "server_settings" }
3518
2806
for name, typ in inspect.getmembers(dbus.service
3520
2808
exclude.add(name)
3522
2810
client_dict["encrypted_secret"] = (client
3523
2811
.encrypted_secret)
3524
2812
for attr in client.client_structure:
3525
2813
if attr not in exclude:
3526
2814
client_dict[attr] = getattr(client, attr)
3528
2816
clients[client.name] = client_dict
3529
2817
del client_settings[client.name]["secret"]
3532
2820
with tempfile.NamedTemporaryFile(