236
195
.replace(b"\n", b"\\n")
237
196
.replace(b"\0", b"\\x00"))
240
199
def encrypt(self, data, password):
241
200
passphrase = self.password_encode(password)
242
201
with tempfile.NamedTemporaryFile(
243
202
dir=self.tempdir) as passfile:
244
203
passfile.write(passphrase)
246
proc = subprocess.Popen([self.gpg, '--symmetric',
205
proc = subprocess.Popen(['gpg', '--symmetric',
247
206
'--passphrase-file',
249
208
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
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)
254
213
if proc.returncode != 0:
255
214
raise PGPError(err)
256
215
return ciphertext
258
217
def decrypt(self, data, password):
259
218
passphrase = self.password_encode(password)
260
219
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
220
dir = self.tempdir) as passfile:
262
221
passfile.write(passphrase)
264
proc = subprocess.Popen([self.gpg, '--decrypt',
223
proc = subprocess.Popen(['gpg', '--decrypt',
265
224
'--passphrase-file',
267
226
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
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)
272
231
if proc.returncode != 0:
273
232
raise PGPError(err)
274
233
return decrypted_plaintext
277
# Pretend that we have an Avahi module
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
304
236
class AvahiError(Exception):
305
237
def __init__(self, value, *args, **kwargs):
306
238
self.value = value
496
417
class AvahiServiceToSyslog(AvahiService):
497
418
def rename(self, *args, **kwargs):
498
419
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
420
ret = AvahiService.rename(self, *args, **kwargs)
500
421
syslogger.setFormatter(logging.Formatter(
501
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
423
.format(self.name)))
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
426
def subprocess_call_pipe(connection, # : multiprocessing.Connection
819
428
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
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.
824
connection.send(func(*args, **kwargs))
433
connection.send(subprocess.call(*args, **kwargs))
825
434
connection.close()
828
436
class Client(object):
829
437
"""A representation of a client host served by this server.
832
440
approved: bool(); 'None' if not yet approved/disapproved
833
441
approval_delay: datetime.timedelta(); Time to wait for approval
1283
882
for cls in self.__class__.__mro__
1284
883
for name, athing in
1285
884
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1294
Inserts annotation tags on methods and signals.
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1299
document = xml.dom.minidom.parseString(xmlstring)
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1339
arg.setAttribute("name",
1341
xmlstring = document.toxml("utf-8")
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1351
"""A D-Bus object with properties.
1353
Classes inheriting from this can use the dbus_service_property
1354
decorator to expose methods as D-Bus properties. It exposes the
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
1358
886
def _get_dbus_property(self, interface_name, property_name):
1359
887
"""Returns a bound method if one exists which is a D-Bus
1360
888
property with the specified name and interface.
1515
1046
return xmlstring
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
1049
def datetime_to_dbus(dt, variant_level=0):
1590
1050
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1592
return dbus.String("", variant_level=variant_level)
1052
return dbus.String("", variant_level = variant_level)
1593
1053
return dbus.String(dt.isoformat(), variant_level=variant_level)
2377
1805
delay -= time2 - time
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
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
2386
1820
logger.info("Sending secret to %s", client.name)
2387
1821
# bump the timeout using extended_timeout
2388
1822
client.bump_timeout(client.extended_timeout)
2389
1823
if self.server.use_dbus:
2390
1824
# Emit D-Bus signal
2391
1825
client.GotSecret()
2394
1828
if approval_required:
2395
1829
client.approvals_pending -= 1
2398
except gnutls.Error as error:
1832
except gnutls.errors.GNUTLSError as error:
2399
1833
logger.warning("GnuTLS bye failed",
2400
1834
exc_info=error)
2403
1837
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...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
2420
1845
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1846
cert_list = (gnutls.library.functions
1847
.gnutls_certificate_get_peers
2422
1848
(session._c_object, ctypes.byref(list_size)))
2423
1849
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1850
raise gnutls.errors.GNUTLSError("error getting peer"
2425
1852
if list_size.value == 0:
2427
1854
cert = cert_list[0]
2428
1855
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2465
1858
def fingerprint(openpgp):
2466
1859
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1860
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
1861
datum = gnutls.library.types.gnutls_datum_t(
2469
1862
ctypes.cast(ctypes.c_char_p(openpgp),
2470
1863
ctypes.POINTER(ctypes.c_ubyte)),
2471
1864
ctypes.c_uint(len(openpgp)))
2472
1865
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1866
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1867
gnutls.library.functions.gnutls_openpgp_crt_init(
2475
1869
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
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)
2478
1873
# Verify the self signature in the key
2479
1874
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1875
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1876
crt, 0, ctypes.byref(crtverify))
2482
1877
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1878
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
raise gnutls.errors.CertificateSecurityError(
2486
1881
# New buffer for the fingerprint
2487
1882
buf = ctypes.create_string_buffer(20)
2488
1883
buf_len = ctypes.c_size_t()
2489
1884
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1885
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1886
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2492
1887
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1888
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1889
# Convert the buffer to a Python bytestring
2495
1890
fpr = ctypes.string_at(buf, buf_len.value)
2496
1891
# Convert the bytestring to hexadecimal notation
2585
1979
# socket_wrapper(), if socketfd was set.
2586
1980
socketserver.TCPServer.__init__(self, server_address,
2587
1981
RequestHandlerClass)
2589
1983
def server_bind(self):
2590
1984
"""This overrides the normal server_bind() function
2591
1985
to bind to an interface if one was specified, and also NOT to
2592
1986
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1987
if self.interface is not None:
2595
1988
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" 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)
2617
2010
# Only bind(2) the socket if we really need to.
2618
2011
if self.server_address[0] or self.server_address[1]:
2619
2012
if not self.server_address[0]:
2620
2013
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
2014
any_address = "::" # in6addr_any
2623
any_address = "0.0.0.0" # INADDR_ANY
2016
any_address = "0.0.0.0" # INADDR_ANY
2624
2017
self.server_address = (any_address,
2625
2018
self.server_address[1])
2626
2019
elif not self.server_address[1]:
2660
2053
self.gnutls_priority = gnutls_priority
2661
2054
IPv6_TCPServer.__init__(self, server_address,
2662
2055
RequestHandlerClass,
2663
interface=interface,
2056
interface = interface,
2057
use_ipv6 = use_ipv6,
2058
socketfd = socketfd)
2667
2060
def server_activate(self):
2668
2061
if self.enabled:
2669
2062
return socketserver.TCPServer.server_activate(self)
2671
2064
def enable(self):
2672
2065
self.enabled = True
2674
2067
def add_pipe(self, parent_pipe, proc):
2675
2068
# Call "handle_ipc" for both data and EOF events
2069
gobject.io_add_watch(
2677
2070
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2071
gobject.IO_IN | gobject.IO_HUP,
2679
2072
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2073
parent_pipe = parent_pipe,
2683
2076
def handle_ipc(self, source, condition,
2684
2077
parent_pipe=None,
2686
2079
client_object=None):
2687
2080
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2081
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2689
2082
# Wait for other process to exit
2693
2086
# Read a request from the child
2694
2087
request = parent_pipe.recv()
2695
2088
command = request[0]
2697
2090
if command == 'init':
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2705
if key_id and c.key_id == key_id:
2708
if fpr and c.fingerprint == fpr:
2092
address = request[2]
2094
for c in self.clients.itervalues():
2095
if c.fingerprint == fpr:
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
2099
logger.info("Client not found for fingerprint: %s, ad"
2100
"dress: %s", fpr, address)
2714
2101
if self.use_dbus:
2715
2102
# Emit D-Bus signal
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2103
mandos_dbus_service.ClientNotFound(fpr,
2718
2105
parent_pipe.send(False)
2108
gobject.io_add_watch(
2722
2109
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2110
gobject.IO_IN | gobject.IO_HUP,
2724
2111
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2727
client_object=client))
2112
parent_pipe = parent_pipe,
2114
client_object = client))
2728
2115
parent_pipe.send(True)
2729
2116
# remove the old hook in favor of the new above hook on
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"]]
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
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
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
2604
clients_data, old_client_settings = pickle.load(
3274
2606
os.remove(stored_state_path)
3275
2607
except IOError as e:
3276
2608
if e.errno == errno.ENOENT:
3354
2686
for client_name in (set(client_settings)
3355
2687
- set(old_client_settings)):
3356
2688
clients_data[client_name] = client_settings[client_name]
3358
2690
# Create all client objects
3359
2691
for client_name, client in clients_data.items():
3360
2692
tcp_server.clients[client_name] = client_class(
3363
server_settings=server_settings)
2695
server_settings = server_settings)
3365
2697
if not tcp_server.clients:
3366
2698
logger.warning("No clients defined")
3368
2700
if not foreground:
3369
2701
if pidfile is not None:
3373
print(pid, file=pidfile)
2705
pidfile.write("{}\n".format(pid).encode("utf-8"))
3374
2706
except IOError:
3375
2707
logger.error("Could not write to file %r with PID %d",
3376
2708
pidfilename, pid)
3378
2710
del pidfilename
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
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())
3386
2717
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2718
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2719
class MandosDBusService(DBusObjectWithProperties):
3389
2720
"""A D-Bus proxy object"""
3391
2722
def __init__(self):
3392
2723
dbus.service.Object.__init__(self, bus, "/")
3394
2725
_interface = "se.recompile.Mandos"
2727
@dbus_interface_annotations(_interface)
2730
"org.freedesktop.DBus.Property.EmitsChangedSignal":
3396
2733
@dbus.service.signal(_interface, signature="o")
3397
2734
def ClientAdded(self, objpath):
3401
2738
@dbus.service.signal(_interface, signature="ss")
3402
def ClientNotFound(self, key_id, address):
2739
def ClientNotFound(self, fingerprint, address):
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3408
2743
@dbus.service.signal(_interface, signature="os")
3409
2744
def ClientRemoved(self, objpath, name):
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3415
2748
@dbus.service.method(_interface, out_signature="ao")
3416
2749
def GetAllClients(self):
3418
2751
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2752
tcp_server.clients.itervalues())
3423
2754
@dbus.service.method(_interface,
3424
2755
out_signature="a{oa{sv}}")
3425
2756
def GetAllClientsWithProperties(self):
3427
2758
return dbus.Dictionary(
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2759
{ c.dbus_object_path: c.GetAll("")
2760
for c in tcp_server.clients.itervalues() },
3431
2761
signature="oa{sv}")
3433
2763
@dbus.service.method(_interface, in_signature="o")
3434
2764
def RemoveClient(self, object_path):
3436
for c in tcp_server.clients.values():
2766
for c in tcp_server.clients.itervalues():
3437
2767
if c.dbus_object_path == object_path:
3438
2768
del tcp_server.clients[c.name]
3439
2769
c.remove_from_connection()
3440
# Don't signal the disabling
2770
# Don't signal anything except ClientRemoved
3441
2771
c.disable(quiet=True)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2773
self.ClientRemoved(object_path, c.name)
3445
2775
raise KeyError(object_path)
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3456
{interface: client.GetAll(interface)
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3468
{interface: client.GetAll(interface)
3470
client._get_all_interface_names()}))
3472
self.ClientAdded(client.dbus_object_path)
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3482
self.ClientRemoved(client.dbus_object_path,
3485
2779
mandos_dbus_service = MandosDBusService()
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3493
2782
"Cleanup function; run on exit"
3495
2784
service.cleanup()
3497
mp.active_children()
2786
multiprocessing.active_children()
3499
2788
if not (tcp_server.clients or client_settings):
3502
2791
# Store client before exiting. Secrets are encrypted with key
3503
2792
# based on what config file has. If config file is
3504
2793
# removed/edited, old secret will thus be unrecovable.
3506
2795
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
2796
for client in tcp_server.clients.itervalues():
3508
2797
key = client_settings[client.name]["secret"]
3509
2798
client.encrypted_secret = pgp.encrypt(client.secret,
3511
2800
client_dict = {}
3513
2802
# A list of attributes that can not be pickled
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
2804
exclude = { "bus", "changedstate", "secret",
2805
"checker", "server_settings" }
3517
2806
for name, typ in inspect.getmembers(dbus.service
3519
2808
exclude.add(name)
3521
2810
client_dict["encrypted_secret"] = (client
3522
2811
.encrypted_secret)
3523
2812
for attr in client.client_structure:
3524
2813
if attr not in exclude:
3525
2814
client_dict[attr] = getattr(client, attr)
3527
2816
clients[client.name] = client_dict
3528
2817
del client_settings[client.name]["secret"]
3531
2820
with tempfile.NamedTemporaryFile(