236
196
.replace(b"\n", b"\\n")
237
197
.replace(b"\0", b"\\x00"))
240
200
def encrypt(self, data, password):
241
201
passphrase = self.password_encode(password)
242
202
with tempfile.NamedTemporaryFile(
243
203
dir=self.tempdir) as passfile:
244
204
passfile.write(passphrase)
246
proc = subprocess.Popen([self.gpg, '--symmetric',
206
proc = subprocess.Popen(['gpg', '--symmetric',
247
207
'--passphrase-file',
249
209
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
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)
254
214
if proc.returncode != 0:
255
215
raise PGPError(err)
256
216
return ciphertext
258
218
def decrypt(self, data, password):
259
219
passphrase = self.password_encode(password)
260
220
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
221
dir = self.tempdir) as passfile:
262
222
passfile.write(passphrase)
264
proc = subprocess.Popen([self.gpg, '--decrypt',
224
proc = subprocess.Popen(['gpg', '--decrypt',
265
225
'--passphrase-file',
267
227
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
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)
272
232
if proc.returncode != 0:
273
233
raise PGPError(err)
274
234
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
237
class AvahiError(Exception):
305
238
def __init__(self, value, *args, **kwargs):
306
239
self.value = value
496
429
class AvahiServiceToSyslog(AvahiService):
497
430
def rename(self, *args, **kwargs):
498
431
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
432
ret = AvahiService.rename(self, *args, **kwargs)
500
433
syslogger.setFormatter(logging.Formatter(
501
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
435
.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
438
def call_pipe(connection, # : multiprocessing.Connection
818
439
func, *args, **kwargs):
819
440
"""This function is meant to be called by multiprocessing.Process
821
442
This function runs func(*args, **kwargs), and writes the resulting
822
443
return value on the provided multiprocessing.Connection.
824
445
connection.send(func(*args, **kwargs))
825
446
connection.close()
828
448
class Client(object):
829
449
"""A representation of a client host served by this server.
832
452
approved: bool(); 'None' if not yet approved/disapproved
833
453
approval_delay: datetime.timedelta(); Time to wait for approval
1283
895
for cls in self.__class__.__mro__
1284
896
for name, athing in
1285
897
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
899
def _get_dbus_property(self, interface_name, property_name):
1359
900
"""Returns a bound method if one exists which is a D-Bus
1360
901
property with the specified name and interface.
1515
1059
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
1062
def datetime_to_dbus(dt, variant_level=0):
1590
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1592
return dbus.String("", variant_level=variant_level)
1065
return dbus.String("", variant_level = variant_level)
1593
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
2377
1845
delay -= time2 - time
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1848
while sent_size < len(client.secret):
1850
sent = session.send(client.secret[sent_size:])
1851
except gnutls.errors.GNUTLSError as error:
1852
logger.warning("gnutls send failed",
1855
logger.debug("Sent: %d, remaining: %d", sent,
1856
len(client.secret) - (sent_size
2386
1860
logger.info("Sending secret to %s", client.name)
2387
1861
# bump the timeout using extended_timeout
2388
1862
client.bump_timeout(client.extended_timeout)
2389
1863
if self.server.use_dbus:
2390
1864
# Emit D-Bus signal
2391
1865
client.GotSecret()
2394
1868
if approval_required:
2395
1869
client.approvals_pending -= 1
2398
except gnutls.Error as error:
1872
except gnutls.errors.GNUTLSError as error:
2399
1873
logger.warning("GnuTLS bye failed",
2400
1874
exc_info=error)
2403
1877
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
1878
"Return the peer's OpenPGP certificate as a bytestring"
1879
# If not an OpenPGP certificate...
1880
if (gnutls.library.functions.gnutls_certificate_type_get(
1882
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1883
# ...do the normal thing
1884
return session.peer_certificate
2420
1885
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1886
cert_list = (gnutls.library.functions
1887
.gnutls_certificate_get_peers
2422
1888
(session._c_object, ctypes.byref(list_size)))
2423
1889
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1890
raise gnutls.errors.GNUTLSError("error getting peer"
2425
1892
if list_size.value == 0:
2427
1894
cert = cert_list[0]
2428
1895
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
1898
def fingerprint(openpgp):
2466
1899
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1900
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
1901
datum = gnutls.library.types.gnutls_datum_t(
2469
1902
ctypes.cast(ctypes.c_char_p(openpgp),
2470
1903
ctypes.POINTER(ctypes.c_ubyte)),
2471
1904
ctypes.c_uint(len(openpgp)))
2472
1905
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1906
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1907
gnutls.library.functions.gnutls_openpgp_crt_init(
2475
1909
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1910
gnutls.library.functions.gnutls_openpgp_crt_import(
1911
crt, ctypes.byref(datum),
1912
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2478
1913
# Verify the self signature in the key
2479
1914
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1915
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1916
crt, 0, ctypes.byref(crtverify))
2482
1917
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1918
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1919
raise gnutls.errors.CertificateSecurityError(
2486
1921
# New buffer for the fingerprint
2487
1922
buf = ctypes.create_string_buffer(20)
2488
1923
buf_len = ctypes.c_size_t()
2489
1924
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1925
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1926
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2492
1927
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1928
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1929
# Convert the buffer to a Python bytestring
2495
1930
fpr = ctypes.string_at(buf, buf_len.value)
2496
1931
# Convert the bytestring to hexadecimal notation
2585
2019
# socket_wrapper(), if socketfd was set.
2586
2020
socketserver.TCPServer.__init__(self, server_address,
2587
2021
RequestHandlerClass)
2589
2023
def server_bind(self):
2590
2024
"""This overrides the normal server_bind() function
2591
2025
to bind to an interface if one was specified, and also NOT to
2592
2026
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
2027
if self.interface is not None:
2595
2028
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)
2029
logger.error("SO_BINDTODEVICE does not exist;"
2030
" cannot bind to interface %s",
2034
self.socket.setsockopt(
2035
socket.SOL_SOCKET, SO_BINDTODEVICE,
2036
(self.interface + "\0").encode("utf-8"))
2037
except socket.error as error:
2038
if error.errno == errno.EPERM:
2039
logger.error("No permission to bind to"
2040
" interface %s", self.interface)
2041
elif error.errno == errno.ENOPROTOOPT:
2042
logger.error("SO_BINDTODEVICE not available;"
2043
" cannot bind to interface %s",
2045
elif error.errno == errno.ENODEV:
2046
logger.error("Interface %s does not exist,"
2047
" cannot bind", self.interface)
2617
2050
# Only bind(2) the socket if we really need to.
2618
2051
if self.server_address[0] or self.server_address[1]:
2619
2052
if not self.server_address[0]:
2620
2053
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
2054
any_address = "::" # in6addr_any
2623
any_address = "0.0.0.0" # INADDR_ANY
2056
any_address = "0.0.0.0" # INADDR_ANY
2624
2057
self.server_address = (any_address,
2625
2058
self.server_address[1])
2626
2059
elif not self.server_address[1]:
2660
2093
self.gnutls_priority = gnutls_priority
2661
2094
IPv6_TCPServer.__init__(self, server_address,
2662
2095
RequestHandlerClass,
2663
interface=interface,
2096
interface = interface,
2097
use_ipv6 = use_ipv6,
2098
socketfd = socketfd)
2667
2100
def server_activate(self):
2668
2101
if self.enabled:
2669
2102
return socketserver.TCPServer.server_activate(self)
2671
2104
def enable(self):
2672
2105
self.enabled = True
2674
2107
def add_pipe(self, parent_pipe, proc):
2675
2108
# Call "handle_ipc" for both data and EOF events
2109
gobject.io_add_watch(
2677
2110
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2111
gobject.IO_IN | gobject.IO_HUP,
2679
2112
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2113
parent_pipe = parent_pipe,
2683
2116
def handle_ipc(self, source, condition,
2684
2117
parent_pipe=None,
2686
2119
client_object=None):
2687
2120
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2121
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2689
2122
# Wait for other process to exit
2693
2126
# Read a request from the child
2694
2127
request = parent_pipe.recv()
2695
2128
command = request[0]
2697
2130
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:
2132
address = request[2]
2134
for c in self.clients.itervalues():
2135
if c.fingerprint == fpr:
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
2139
logger.info("Client not found for fingerprint: %s, ad"
2140
"dress: %s", fpr, address)
2714
2141
if self.use_dbus:
2715
2142
# Emit D-Bus signal
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2143
mandos_dbus_service.ClientNotFound(fpr,
2718
2145
parent_pipe.send(False)
2148
gobject.io_add_watch(
2722
2149
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2150
gobject.IO_IN | gobject.IO_HUP,
2724
2151
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2727
client_object=client))
2152
parent_pipe = parent_pipe,
2154
client_object = client))
2728
2155
parent_pipe.send(True)
2729
2156
# remove the old hook in favor of the new above hook on
3192
2604
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
2605
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
2606
name = server_settings["servicename"],
2607
servicetype = "_mandos._tcp",
2608
protocol = protocol,
3198
2610
if server_settings["interface"]:
3199
2611
service.interface = if_nametoindex(
3200
2612
server_settings["interface"].encode("utf-8"))
3202
2614
global multiprocessing_manager
3203
2615
multiprocessing_manager = multiprocessing.Manager()
3205
2617
client_class = Client
3207
client_class = functools.partial(ClientDBus, bus=bus)
2619
client_class = functools.partial(ClientDBus, bus = bus)
3209
2621
client_settings = Client.config_parser(client_config)
3210
2622
old_client_settings = {}
3211
2623
clients_data = {}
3213
2625
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
2627
wnull = open(os.devnull, "w") # A writable /dev/null
3216
2628
# Only used if server is running in foreground but not in debug
3218
2630
if debug or not foreground:
3221
2633
# Get client data and settings from last running state.
3222
2634
if server_settings["restore"]:
3224
2636
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"]
2637
clients_data, old_client_settings = pickle.load(
3274
2639
os.remove(stored_state_path)
3275
2640
except IOError as e:
3276
2641
if e.errno == errno.ENOENT:
3376
2741
pidfilename, pid)
3378
2743
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)
2745
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2746
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3386
2750
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2751
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2752
class MandosDBusService(DBusObjectWithProperties):
3389
2753
"""A D-Bus proxy object"""
3391
2755
def __init__(self):
3392
2756
dbus.service.Object.__init__(self, bus, "/")
3394
2758
_interface = "se.recompile.Mandos"
2760
@dbus_interface_annotations(_interface)
2763
"org.freedesktop.DBus.Property.EmitsChangedSignal":
3396
2766
@dbus.service.signal(_interface, signature="o")
3397
2767
def ClientAdded(self, objpath):
3401
2771
@dbus.service.signal(_interface, signature="ss")
3402
def ClientNotFound(self, key_id, address):
2772
def ClientNotFound(self, fingerprint, address):
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3408
2776
@dbus.service.signal(_interface, signature="os")
3409
2777
def ClientRemoved(self, objpath, name):
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3415
2781
@dbus.service.method(_interface, out_signature="ao")
3416
2782
def GetAllClients(self):
3418
2784
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2785
tcp_server.clients.itervalues())
3423
2787
@dbus.service.method(_interface,
3424
2788
out_signature="a{oa{sv}}")
3425
2789
def GetAllClientsWithProperties(self):
3427
2791
return dbus.Dictionary(
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2792
{ c.dbus_object_path: c.GetAll("")
2793
for c in tcp_server.clients.itervalues() },
3431
2794
signature="oa{sv}")
3433
2796
@dbus.service.method(_interface, in_signature="o")
3434
2797
def RemoveClient(self, object_path):
3436
for c in tcp_server.clients.values():
2799
for c in tcp_server.clients.itervalues():
3437
2800
if c.dbus_object_path == object_path:
3438
2801
del tcp_server.clients[c.name]
3439
2802
c.remove_from_connection()
3440
# Don't signal the disabling
2803
# Don't signal anything except ClientRemoved
3441
2804
c.disable(quiet=True)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2806
self.ClientRemoved(object_path, c.name)
3445
2808
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
2812
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
2815
"Cleanup function; run on exit"
3495
2817
service.cleanup()
3497
mp.active_children()
2819
multiprocessing.active_children()
3499
2821
if not (tcp_server.clients or client_settings):
3502
2824
# Store client before exiting. Secrets are encrypted with key
3503
2825
# based on what config file has. If config file is
3504
2826
# removed/edited, old secret will thus be unrecovable.
3506
2828
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
2829
for client in tcp_server.clients.itervalues():
3508
2830
key = client_settings[client.name]["secret"]
3509
2831
client.encrypted_secret = pgp.encrypt(client.secret,
3511
2833
client_dict = {}
3513
2835
# A list of attributes that can not be pickled
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
2837
exclude = { "bus", "changedstate", "secret",
2838
"checker", "server_settings" }
3517
2839
for name, typ in inspect.getmembers(dbus.service
3519
2841
exclude.add(name)
3521
2843
client_dict["encrypted_secret"] = (client
3522
2844
.encrypted_secret)
3523
2845
for attr in client.client_structure:
3524
2846
if attr not in exclude:
3525
2847
client_dict[attr] = getattr(client, attr)
3527
2849
clients[client.name] = client_dict
3528
2850
del client_settings[client.name]["secret"]
3531
2853
with tempfile.NamedTemporaryFile(