196
236
.replace(b"\n", b"\\n")
197
237
.replace(b"\0", b"\\x00"))
200
240
def encrypt(self, data, password):
201
241
passphrase = self.password_encode(password)
202
242
with tempfile.NamedTemporaryFile(
203
243
dir=self.tempdir) as passfile:
204
244
passfile.write(passphrase)
206
proc = subprocess.Popen(['gpg', '--symmetric',
246
proc = subprocess.Popen([self.gpg, '--symmetric',
207
247
'--passphrase-file',
209
249
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
214
254
if proc.returncode != 0:
215
255
raise PGPError(err)
216
256
return ciphertext
218
258
def decrypt(self, data, password):
219
259
passphrase = self.password_encode(password)
220
260
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
261
dir=self.tempdir) as passfile:
222
262
passfile.write(passphrase)
224
proc = subprocess.Popen(['gpg', '--decrypt',
264
proc = subprocess.Popen([self.gpg, '--decrypt',
225
265
'--passphrase-file',
227
267
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
232
272
if proc.returncode != 0:
233
273
raise PGPError(err)
234
274
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
237
304
class AvahiError(Exception):
238
305
def __init__(self, value, *args, **kwargs):
239
306
self.value = value
429
496
class AvahiServiceToSyslog(AvahiService):
430
497
def rename(self, *args, **kwargs):
431
498
"""Add the new name to the syslog messages"""
432
ret = AvahiService.rename(self, *args, **kwargs)
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
433
500
syslogger.setFormatter(logging.Formatter(
434
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
435
502
.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
438
817
def call_pipe(connection, # : multiprocessing.Connection
439
818
func, *args, **kwargs):
440
819
"""This function is meant to be called by multiprocessing.Process
442
821
This function runs func(*args, **kwargs), and writes the resulting
443
822
return value on the provided multiprocessing.Connection.
445
824
connection.send(func(*args, **kwargs))
446
825
connection.close()
448
828
class Client(object):
449
829
"""A representation of a client host served by this server.
452
832
approved: bool(); 'None' if not yet approved/disapproved
453
833
approval_delay: datetime.timedelta(); Time to wait for approval
895
1283
for cls in self.__class__.__mro__
896
1284
for name, athing in
897
1285
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.
899
1358
def _get_dbus_property(self, interface_name, property_name):
900
1359
"""Returns a bound method if one exists which is a D-Bus
901
1360
property with the specified name and interface.
1059
1515
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",
1062
1589
def datetime_to_dbus(dt, variant_level=0):
1063
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1065
return dbus.String("", variant_level = variant_level)
1592
return dbus.String("", variant_level=variant_level)
1066
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1849
2377
delay -= time2 - time
1852
while sent_size < len(client.secret):
1854
sent = session.send(client.secret[sent_size:])
1855
except gnutls.errors.GNUTLSError as error:
1856
logger.warning("gnutls send failed",
1859
logger.debug("Sent: %d, remaining: %d", sent,
1860
len(client.secret) - (sent_size
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1864
2386
logger.info("Sending secret to %s", client.name)
1865
2387
# bump the timeout using extended_timeout
1866
2388
client.bump_timeout(client.extended_timeout)
1867
2389
if self.server.use_dbus:
1868
2390
# Emit D-Bus signal
1869
2391
client.GotSecret()
1872
2394
if approval_required:
1873
2395
client.approvals_pending -= 1
1876
except gnutls.errors.GNUTLSError as error:
2398
except gnutls.Error as error:
1877
2399
logger.warning("GnuTLS bye failed",
1878
2400
exc_info=error)
1881
2403
def peer_certificate(session):
1882
"Return the peer's OpenPGP certificate as a bytestring"
1883
# If not an OpenPGP certificate...
1884
if (gnutls.library.functions.gnutls_certificate_type_get(
1886
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1887
# ...do the normal thing
1888
return session.peer_certificate
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
1889
2420
list_size = ctypes.c_uint(1)
1890
cert_list = (gnutls.library.functions
1891
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1892
2422
(session._c_object, ctypes.byref(list_size)))
1893
2423
if not bool(cert_list) and list_size.value != 0:
1894
raise gnutls.errors.GNUTLSError("error getting peer"
2424
raise gnutls.Error("error getting peer certificate")
1896
2425
if list_size.value == 0:
1898
2427
cert = cert_list[0]
1899
2428
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()
1902
2465
def fingerprint(openpgp):
1903
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1904
2467
# New GnuTLS "datum" with the OpenPGP public key
1905
datum = gnutls.library.types.gnutls_datum_t(
2468
datum = gnutls.datum_t(
1906
2469
ctypes.cast(ctypes.c_char_p(openpgp),
1907
2470
ctypes.POINTER(ctypes.c_ubyte)),
1908
2471
ctypes.c_uint(len(openpgp)))
1909
2472
# New empty GnuTLS certificate
1910
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1911
gnutls.library.functions.gnutls_openpgp_crt_init(
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1913
2475
# Import the OpenPGP public key into the certificate
1914
gnutls.library.functions.gnutls_openpgp_crt_import(
1915
crt, ctypes.byref(datum),
1916
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1917
2478
# Verify the self signature in the key
1918
2479
crtverify = ctypes.c_uint()
1919
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1920
crt, 0, ctypes.byref(crtverify))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1921
2482
if crtverify.value != 0:
1922
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1923
raise gnutls.errors.CertificateSecurityError(
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1925
2486
# New buffer for the fingerprint
1926
2487
buf = ctypes.create_string_buffer(20)
1927
2488
buf_len = ctypes.c_size_t()
1928
2489
# Get the fingerprint from the certificate into the buffer
1929
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1930
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1931
2492
# Deinit the certificate
1932
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1933
2494
# Convert the buffer to a Python bytestring
1934
2495
fpr = ctypes.string_at(buf, buf_len.value)
1935
2496
# Convert the bytestring to hexadecimal notation
2023
2585
# socket_wrapper(), if socketfd was set.
2024
2586
socketserver.TCPServer.__init__(self, server_address,
2025
2587
RequestHandlerClass)
2027
2589
def server_bind(self):
2028
2590
"""This overrides the normal server_bind() function
2029
2591
to bind to an interface if one was specified, and also NOT to
2030
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2031
2594
if self.interface is not None:
2032
2595
if SO_BINDTODEVICE is None:
2033
logger.error("SO_BINDTODEVICE does not exist;"
2034
" cannot bind to interface %s",
2038
self.socket.setsockopt(
2039
socket.SOL_SOCKET, SO_BINDTODEVICE,
2040
(self.interface + "\0").encode("utf-8"))
2041
except socket.error as error:
2042
if error.errno == errno.EPERM:
2043
logger.error("No permission to bind to"
2044
" interface %s", self.interface)
2045
elif error.errno == errno.ENOPROTOOPT:
2046
logger.error("SO_BINDTODEVICE not available;"
2047
" cannot bind to interface %s",
2049
elif error.errno == errno.ENODEV:
2050
logger.error("Interface %s does not exist,"
2051
" cannot bind", self.interface)
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)
2054
2617
# Only bind(2) the socket if we really need to.
2055
2618
if self.server_address[0] or self.server_address[1]:
2056
2619
if not self.server_address[0]:
2057
2620
if self.address_family == socket.AF_INET6:
2058
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
2060
any_address = "0.0.0.0" # INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
2061
2624
self.server_address = (any_address,
2062
2625
self.server_address[1])
2063
2626
elif not self.server_address[1]:
2097
2660
self.gnutls_priority = gnutls_priority
2098
2661
IPv6_TCPServer.__init__(self, server_address,
2099
2662
RequestHandlerClass,
2100
interface = interface,
2101
use_ipv6 = use_ipv6,
2102
socketfd = socketfd)
2663
interface=interface,
2104
2667
def server_activate(self):
2105
2668
if self.enabled:
2106
2669
return socketserver.TCPServer.server_activate(self)
2108
2671
def enable(self):
2109
2672
self.enabled = True
2111
2674
def add_pipe(self, parent_pipe, proc):
2112
2675
# Call "handle_ipc" for both data and EOF events
2113
gobject.io_add_watch(
2114
2677
parent_pipe.fileno(),
2115
gobject.IO_IN | gobject.IO_HUP,
2678
GLib.IO_IN | GLib.IO_HUP,
2116
2679
functools.partial(self.handle_ipc,
2117
parent_pipe = parent_pipe,
2680
parent_pipe=parent_pipe,
2120
2683
def handle_ipc(self, source, condition,
2121
2684
parent_pipe=None,
2123
2686
client_object=None):
2124
2687
# error, or the other end of multiprocessing.Pipe has closed
2125
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2126
2689
# Wait for other process to exit
2130
2693
# Read a request from the child
2131
2694
request = parent_pipe.recv()
2132
2695
command = request[0]
2134
2697
if command == 'init':
2136
address = request[2]
2138
for c in self.clients.itervalues():
2139
if c.fingerprint == fpr:
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:
2143
logger.info("Client not found for fingerprint: %s, ad"
2144
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
2145
2714
if self.use_dbus:
2146
2715
# Emit D-Bus signal
2147
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2149
2718
parent_pipe.send(False)
2152
gobject.io_add_watch(
2153
2722
parent_pipe.fileno(),
2154
gobject.IO_IN | gobject.IO_HUP,
2723
GLib.IO_IN | GLib.IO_HUP,
2155
2724
functools.partial(self.handle_ipc,
2156
parent_pipe = parent_pipe,
2158
client_object = client))
2725
parent_pipe=parent_pipe,
2727
client_object=client))
2159
2728
parent_pipe.send(True)
2160
2729
# remove the old hook in favor of the new above hook on
2608
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2609
3193
service = AvahiServiceToSyslog(
2610
name = server_settings["servicename"],
2611
servicetype = "_mandos._tcp",
2612
protocol = protocol,
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
2614
3198
if server_settings["interface"]:
2615
3199
service.interface = if_nametoindex(
2616
3200
server_settings["interface"].encode("utf-8"))
2618
3202
global multiprocessing_manager
2619
3203
multiprocessing_manager = multiprocessing.Manager()
2621
3205
client_class = Client
2623
client_class = functools.partial(ClientDBus, bus = bus)
3207
client_class = functools.partial(ClientDBus, bus=bus)
2625
3209
client_settings = Client.config_parser(client_config)
2626
3210
old_client_settings = {}
2627
3211
clients_data = {}
2629
3213
# This is used to redirect stdout and stderr for checker processes
2631
wnull = open(os.devnull, "w") # A writable /dev/null
3215
wnull = open(os.devnull, "w") # A writable /dev/null
2632
3216
# Only used if server is running in foreground but not in debug
2634
3218
if debug or not foreground:
2637
3221
# Get client data and settings from last running state.
2638
3222
if server_settings["restore"]:
2640
3224
with open(stored_state_path, "rb") as stored_state:
2641
clients_data, old_client_settings = pickle.load(
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"]
2643
3274
os.remove(stored_state_path)
2644
3275
except IOError as e:
2645
3276
if e.errno == errno.ENOENT:
2745
3376
pidfilename, pid)
2747
3378
del pidfilename
2749
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2750
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
2754
3386
@alternate_dbus_interfaces(
2755
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2756
class MandosDBusService(DBusObjectWithProperties):
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2757
3389
"""A D-Bus proxy object"""
2759
3391
def __init__(self):
2760
3392
dbus.service.Object.__init__(self, bus, "/")
2762
3394
_interface = "se.recompile.Mandos"
2764
@dbus_interface_annotations(_interface)
2767
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2770
3396
@dbus.service.signal(_interface, signature="o")
2771
3397
def ClientAdded(self, objpath):
2775
3401
@dbus.service.signal(_interface, signature="ss")
2776
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2780
3408
@dbus.service.signal(_interface, signature="os")
2781
3409
def ClientRemoved(self, objpath, name):
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2785
3415
@dbus.service.method(_interface, out_signature="ao")
2786
3416
def GetAllClients(self):
2788
3418
return dbus.Array(c.dbus_object_path for c in
2789
tcp_server.clients.itervalues())
3419
tcp_server.clients.values())
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2791
3423
@dbus.service.method(_interface,
2792
3424
out_signature="a{oa{sv}}")
2793
3425
def GetAllClientsWithProperties(self):
2795
3427
return dbus.Dictionary(
2796
{ c.dbus_object_path: c.GetAll("")
2797
for c in tcp_server.clients.itervalues() },
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2798
3431
signature="oa{sv}")
2800
3433
@dbus.service.method(_interface, in_signature="o")
2801
3434
def RemoveClient(self, object_path):
2803
for c in tcp_server.clients.itervalues():
3436
for c in tcp_server.clients.values():
2804
3437
if c.dbus_object_path == object_path:
2805
3438
del tcp_server.clients[c.name]
2806
3439
c.remove_from_connection()
2807
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2808
3441
c.disable(quiet=True)
2810
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2812
3445
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,
2816
3485
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
2819
3493
"Cleanup function; run on exit"
2821
3495
service.cleanup()
2823
multiprocessing.active_children()
3497
mp.active_children()
2825
3499
if not (tcp_server.clients or client_settings):
2828
3502
# Store client before exiting. Secrets are encrypted with key
2829
3503
# based on what config file has. If config file is
2830
3504
# removed/edited, old secret will thus be unrecovable.
2832
3506
with PGPEngine() as pgp:
2833
for client in tcp_server.clients.itervalues():
3507
for client in tcp_server.clients.values():
2834
3508
key = client_settings[client.name]["secret"]
2835
3509
client.encrypted_secret = pgp.encrypt(client.secret,
2837
3511
client_dict = {}
2839
3513
# A list of attributes that can not be pickled
2841
exclude = { "bus", "changedstate", "secret",
2842
"checker", "server_settings" }
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
2843
3517
for name, typ in inspect.getmembers(dbus.service
2845
3519
exclude.add(name)
2847
3521
client_dict["encrypted_secret"] = (client
2848
3522
.encrypted_secret)
2849
3523
for attr in client.client_structure:
2850
3524
if attr not in exclude:
2851
3525
client_dict[attr] = getattr(client, attr)
2853
3527
clients[client.name] = client_dict
2854
3528
del client_settings[client.name]["secret"]
2857
3531
with tempfile.NamedTemporaryFile(