65
import cPickle as pickle
69
import cPickle as pickle
66
72
import multiprocessing
74
81
import dbus.service
82
from gi.repository import GLib
77
83
from dbus.mainloop.glib import DBusGMainLoop
80
86
import xml.dom.minidom
89
# Try to find the value of SO_BINDTODEVICE:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
84
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
94
except AttributeError:
96
# This is where SO_BINDTODEVICE was up to and including Python
87
98
from IN import SO_BINDTODEVICE
88
99
except ImportError:
89
SO_BINDTODEVICE = None
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
112
SO_BINDTODEVICE = None
114
if sys.version_info.major == 2:
92
118
stored_state_file = "clients.pickle"
94
120
logger = logging.getLogger()
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
101
126
except (OSError, AttributeError):
102
128
def if_nametoindex(interface):
103
129
"Get an interface index the hard way, i.e. using fcntl()"
104
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
131
with contextlib.closing(socket.socket()) as s:
106
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
111
135
return interface_index
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
147
return types.FunctionType(func.__code__,
114
154
def initlogger(debug, level=logging.WARNING):
115
155
"""init logger and add loglevel"""
118
syslogger = (logging.handlers.SysLogHandler
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
158
syslogger = (logging.handlers.SysLogHandler(
159
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
160
address = "/dev/log"))
122
161
syslogger.setFormatter(logging.Formatter
123
162
('Mandos [%(process)d]: %(levelname)s:'
204
257
def decrypt(self, data, password):
205
258
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
259
with tempfile.NamedTemporaryFile(
260
dir = self.tempdir) as passfile:
208
261
passfile.write(passphrase)
210
proc = subprocess.Popen(['gpg', '--decrypt',
263
proc = subprocess.Popen([self.gpg, '--decrypt',
211
264
'--passphrase-file',
213
266
+ self.gnupgargs,
214
267
stdin = subprocess.PIPE,
215
268
stdout = subprocess.PIPE,
216
269
stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
270
decrypted_plaintext, err = proc.communicate(input = data)
219
271
if proc.returncode != 0:
220
272
raise PGPError(err)
221
273
return decrypted_plaintext
275
# Pretend that we have an Avahi module
277
"""This isn't so much a class as it is a module-like namespace.
278
It is instantiated once, and simulates having an Avahi module."""
279
IF_UNSPEC = -1 # avahi-common/address.h
280
PROTO_UNSPEC = -1 # avahi-common/address.h
281
PROTO_INET = 0 # avahi-common/address.h
282
PROTO_INET6 = 1 # avahi-common/address.h
283
DBUS_NAME = "org.freedesktop.Avahi"
284
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
285
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
286
DBUS_PATH_SERVER = "/"
287
def string_array_to_txt_array(self, t):
288
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
289
for s in t), signature="ay")
290
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
291
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
292
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
293
SERVER_INVALID = 0 # avahi-common/defs.h
294
SERVER_REGISTERING = 1 # avahi-common/defs.h
295
SERVER_RUNNING = 2 # avahi-common/defs.h
296
SERVER_COLLISION = 3 # avahi-common/defs.h
297
SERVER_FAILURE = 4 # avahi-common/defs.h
224
300
class AvahiError(Exception):
225
301
def __init__(self, value, *args, **kwargs):
226
302
self.value = value
227
super(AvahiError, self).__init__(value, *args, **kwargs)
228
def __unicode__(self):
229
return unicode(repr(self.value))
303
return super(AvahiError, self).__init__(value, *args,
231
307
class AvahiServiceError(AvahiError):
234
311
class AvahiGroupError(AvahiError):
386
485
follow_name_owner_changes=True),
387
486
avahi.DBUS_INTERFACE_SERVER)
388
487
self.server.connect_to_signal("StateChanged",
389
self.server_state_changed)
488
self.server_state_changed)
390
489
self.server_state_changed(self.server.GetState())
393
492
class AvahiServiceToSyslog(AvahiService):
493
def rename(self, *args, **kwargs):
395
494
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({0}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
495
ret = AvahiService.rename(self, *args, **kwargs)
496
syslogger.setFormatter(logging.Formatter(
497
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
404
def timedelta_to_milliseconds(td):
405
"Convert a datetime.timedelta() to milliseconds"
406
return ((td.days * 24 * 60 * 60 * 1000)
407
+ (td.seconds * 1000)
408
+ (td.microseconds // 1000))
501
# Pretend that we have a GnuTLS module
502
class GnuTLS(object):
503
"""This isn't so much a class as it is a module-like namespace.
504
It is instantiated once, and simulates having a GnuTLS module."""
506
_library = ctypes.cdll.LoadLibrary(
507
ctypes.util.find_library("gnutls"))
508
_need_version = b"3.3.0"
510
# Need to use class name "GnuTLS" here, since this method is
511
# called before the assignment to the "gnutls" global variable
513
if GnuTLS.check_version(self._need_version) is None:
514
raise GnuTLS.Error("Needs GnuTLS {} or later"
515
.format(self._need_version))
517
# Unless otherwise indicated, the constants and types below are
518
# all from the gnutls/gnutls.h C header file.
528
E_NO_CERTIFICATE_FOUND = -49
529
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
532
class session_int(ctypes.Structure):
534
session_t = ctypes.POINTER(session_int)
535
class certificate_credentials_st(ctypes.Structure):
537
certificate_credentials_t = ctypes.POINTER(
538
certificate_credentials_st)
539
certificate_type_t = ctypes.c_int
540
class datum_t(ctypes.Structure):
541
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
542
('size', ctypes.c_uint)]
543
class openpgp_crt_int(ctypes.Structure):
545
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
546
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
547
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
548
credentials_type_t = ctypes.c_int
549
transport_ptr_t = ctypes.c_void_p
550
close_request_t = ctypes.c_int
553
class Error(Exception):
554
# We need to use the class name "GnuTLS" here, since this
555
# exception might be raised from within GnuTLS.__init__,
556
# which is called before the assignment to the "gnutls"
557
# global variable has happened.
558
def __init__(self, message = None, code = None, args=()):
559
# Default usage is by a message string, but if a return
560
# code is passed, convert it to a string with
563
if message is None and code is not None:
564
message = GnuTLS.strerror(code)
565
return super(GnuTLS.Error, self).__init__(
568
class CertificateSecurityError(Error):
572
class Credentials(object):
574
self._c_object = gnutls.certificate_credentials_t()
575
gnutls.certificate_allocate_credentials(
576
ctypes.byref(self._c_object))
577
self.type = gnutls.CRD_CERTIFICATE
580
gnutls.certificate_free_credentials(self._c_object)
582
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
584
self._c_object = gnutls.session_t()
585
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
586
gnutls.set_default_priority(self._c_object)
587
gnutls.transport_set_ptr(self._c_object, socket.fileno())
588
gnutls.handshake_set_private_extensions(self._c_object,
591
if credentials is None:
592
credentials = gnutls.Credentials()
593
gnutls.credentials_set(self._c_object, credentials.type,
594
ctypes.cast(credentials._c_object,
596
self.credentials = credentials
599
gnutls.deinit(self._c_object)
602
return gnutls.handshake(self._c_object)
604
def send(self, data):
608
data_len -= gnutls.record_send(self._c_object,
613
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
615
# Error handling functions
616
def _error_code(result):
617
"""A function to raise exceptions on errors, suitable
618
for the 'restype' attribute on ctypes functions"""
621
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
625
def _retry_on_error(result, func, arguments):
626
"""A function to retry on some errors, suitable
627
for the 'errcheck' attribute on ctypes functions"""
629
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
630
return _error_code(result)
631
result = func(*arguments)
634
# Unless otherwise indicated, the function declarations below are
635
# all from the gnutls/gnutls.h C header file.
638
priority_set_direct = _library.gnutls_priority_set_direct
639
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
ctypes.POINTER(ctypes.c_char_p)]
641
priority_set_direct.restype = _error_code
643
init = _library.gnutls_init
644
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
init.restype = _error_code
647
set_default_priority = _library.gnutls_set_default_priority
648
set_default_priority.argtypes = [session_t]
649
set_default_priority.restype = _error_code
651
record_send = _library.gnutls_record_send
652
record_send.argtypes = [session_t, ctypes.c_void_p,
654
record_send.restype = ctypes.c_ssize_t
655
record_send.errcheck = _retry_on_error
657
certificate_allocate_credentials = (
658
_library.gnutls_certificate_allocate_credentials)
659
certificate_allocate_credentials.argtypes = [
660
ctypes.POINTER(certificate_credentials_t)]
661
certificate_allocate_credentials.restype = _error_code
663
certificate_free_credentials = (
664
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
666
certificate_free_credentials.restype = None
668
handshake_set_private_extensions = (
669
_library.gnutls_handshake_set_private_extensions)
670
handshake_set_private_extensions.argtypes = [session_t,
672
handshake_set_private_extensions.restype = None
674
credentials_set = _library.gnutls_credentials_set
675
credentials_set.argtypes = [session_t, credentials_type_t,
677
credentials_set.restype = _error_code
679
strerror = _library.gnutls_strerror
680
strerror.argtypes = [ctypes.c_int]
681
strerror.restype = ctypes.c_char_p
683
certificate_type_get = _library.gnutls_certificate_type_get
684
certificate_type_get.argtypes = [session_t]
685
certificate_type_get.restype = _error_code
687
certificate_get_peers = _library.gnutls_certificate_get_peers
688
certificate_get_peers.argtypes = [session_t,
689
ctypes.POINTER(ctypes.c_uint)]
690
certificate_get_peers.restype = ctypes.POINTER(datum_t)
692
global_set_log_level = _library.gnutls_global_set_log_level
693
global_set_log_level.argtypes = [ctypes.c_int]
694
global_set_log_level.restype = None
696
global_set_log_function = _library.gnutls_global_set_log_function
697
global_set_log_function.argtypes = [log_func]
698
global_set_log_function.restype = None
700
deinit = _library.gnutls_deinit
701
deinit.argtypes = [session_t]
702
deinit.restype = None
704
handshake = _library.gnutls_handshake
705
handshake.argtypes = [session_t]
706
handshake.restype = _error_code
707
handshake.errcheck = _retry_on_error
709
transport_set_ptr = _library.gnutls_transport_set_ptr
710
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
transport_set_ptr.restype = None
713
bye = _library.gnutls_bye
714
bye.argtypes = [session_t, close_request_t]
715
bye.restype = _error_code
716
bye.errcheck = _retry_on_error
718
check_version = _library.gnutls_check_version
719
check_version.argtypes = [ctypes.c_char_p]
720
check_version.restype = ctypes.c_char_p
722
# All the function declarations below are from gnutls/openpgp.h
724
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
openpgp_crt_init.restype = _error_code
728
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
ctypes.POINTER(datum_t),
732
openpgp_crt_import.restype = _error_code
734
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
ctypes.POINTER(ctypes.c_uint)]
737
openpgp_crt_verify_self.restype = _error_code
739
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
openpgp_crt_deinit.restype = None
743
openpgp_crt_get_fingerprint = (
744
_library.gnutls_openpgp_crt_get_fingerprint)
745
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
749
openpgp_crt_get_fingerprint.restype = _error_code
751
# Remove non-public functions
752
del _error_code, _retry_on_error
753
# Create the global "gnutls" object, simulating a module
756
def call_pipe(connection, # : multiprocessing.Connection
757
func, *args, **kwargs):
758
"""This function is meant to be called by multiprocessing.Process
760
This function runs func(*args, **kwargs), and writes the resulting
761
return value on the provided multiprocessing.Connection.
763
connection.send(func(*args, **kwargs))
411
766
class Client(object):
412
767
"""A representation of a client host served by this server.
623
965
# Schedule a new checker to be started an 'interval' from now,
624
966
# and every interval from then on.
625
967
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
627
self.checker_initiator_tag = (gobject.timeout_add
628
(self.interval_milliseconds(),
968
GLib.source_remove(self.checker_initiator_tag)
969
self.checker_initiator_tag = GLib.timeout_add(
970
int(self.interval.total_seconds() * 1000),
630
972
# Schedule a disable() when 'timeout' has passed
631
973
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
633
self.disable_initiator_tag = (gobject.timeout_add
634
(self.timeout_milliseconds(),
974
GLib.source_remove(self.disable_initiator_tag)
975
self.disable_initiator_tag = GLib.timeout_add(
976
int(self.timeout.total_seconds() * 1000), self.disable)
636
977
# Also start a new checker *right now*.
637
978
self.start_checker()
639
def checker_callback(self, pid, condition, command):
980
def checker_callback(self, source, condition, connection,
640
982
"""The checker has completed, so take appropriate actions."""
641
983
self.checker_callback_tag = None
642
984
self.checker = None
643
if os.WIFEXITED(condition):
644
self.last_checker_status = os.WEXITSTATUS(condition)
985
# Read return code from connection (see call_pipe)
986
returncode = connection.recv()
990
self.last_checker_status = returncode
991
self.last_checker_signal = None
645
992
if self.last_checker_status == 0:
646
993
logger.info("Checker for %(name)s succeeded",
648
995
self.checked_ok()
650
logger.info("Checker for %(name)s failed",
997
logger.info("Checker for %(name)s failed", vars(self))
653
999
self.last_checker_status = -1
1000
self.last_checker_signal = -returncode
654
1001
logger.warning("Checker for %(name)s crashed?",
657
1005
def checked_ok(self):
658
1006
"""Assert that the client has been seen, alive and well."""
659
1007
self.last_checked_ok = datetime.datetime.utcnow()
660
1008
self.last_checker_status = 0
1009
self.last_checker_signal = None
661
1010
self.bump_timeout()
663
1012
def bump_timeout(self, timeout=None):
690
1038
# than 'timeout' for the client to be disabled, which is as it
693
# If a checker exists, make sure it is not a zombie
695
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
696
except AttributeError:
698
except OSError as error:
699
if error.errno != errno.ECHILD:
703
logger.warning("Checker was a zombie")
704
gobject.source_remove(self.checker_callback_tag)
705
self.checker_callback(pid, status,
706
self.current_checker_command)
1041
if self.checker is not None and not self.checker.is_alive():
1042
logger.warning("Checker was not alive; joining")
707
1045
# Start a new checker if needed
708
1046
if self.checker is None:
709
1047
# Escape attributes for the shell
710
escaped_attrs = dict(
711
(attr, re.escape(unicode(getattr(self, attr))))
713
self.runtime_expansions)
1049
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
715
1052
command = self.checker_command % escaped_attrs
716
1053
except TypeError as error:
717
1054
logger.error('Could not format string "%s"',
718
self.checker_command, exc_info=error)
719
return True # Try again later
1055
self.checker_command,
1057
return True # Try again later
720
1058
self.current_checker_command = command
722
logger.info("Starting checker %r for %s",
724
# We don't need to redirect stdout and stderr, since
725
# in normal mode, that is already done by daemon(),
726
# and in debug mode we don't want to. (Stdin is
727
# always replaced by /dev/null.)
728
# The exception is when not debugging but nevertheless
729
# running in the foreground; use the previously
732
if (not self.server_settings["debug"]
733
and self.server_settings["foreground"]):
734
popen_args.update({"stdout": wnull,
736
self.checker = subprocess.Popen(command,
740
except OSError as error:
741
logger.error("Failed to start subprocess",
744
self.checker_callback_tag = (gobject.child_watch_add
746
self.checker_callback,
748
# The checker may have completed before the gobject
749
# watch was added. Check for this.
751
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
752
except OSError as error:
753
if error.errno == errno.ECHILD:
754
# This should never happen
755
logger.error("Child process vanished",
760
gobject.source_remove(self.checker_callback_tag)
761
self.checker_callback(pid, status, command)
762
# Re-run this periodically if run by gobject.timeout_add
1059
logger.info("Starting checker %r for %s", command,
1061
# We don't need to redirect stdout and stderr, since
1062
# in normal mode, that is already done by daemon(),
1063
# and in debug mode we don't want to. (Stdin is
1064
# always replaced by /dev/null.)
1065
# The exception is when not debugging but nevertheless
1066
# running in the foreground; use the previously
1068
popen_args = { "close_fds": True,
1071
if (not self.server_settings["debug"]
1072
and self.server_settings["foreground"]):
1073
popen_args.update({"stdout": wnull,
1075
pipe = multiprocessing.Pipe(duplex = False)
1076
self.checker = multiprocessing.Process(
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1080
self.checker.start()
1081
self.checker_callback_tag = GLib.io_add_watch(
1082
pipe[0].fileno(), GLib.IO_IN,
1083
self.checker_callback, pipe[0], command)
1084
# Re-run this periodically if run by GLib.timeout_add
765
1087
def stop_checker(self):
766
1088
"""Force the checker process, if any, to stop."""
767
1089
if self.checker_callback_tag:
768
gobject.source_remove(self.checker_callback_tag)
1090
GLib.source_remove(self.checker_callback_tag)
769
1091
self.checker_callback_tag = None
770
1092
if getattr(self, "checker", None) is None:
772
1094
logger.debug("Stopping checker for %(name)s", vars(self))
774
self.checker.terminate()
776
#if self.checker.poll() is None:
777
# self.checker.kill()
778
except OSError as error:
779
if error.errno != errno.ESRCH: # No such process
1095
self.checker.terminate()
781
1096
self.checker = None
784
def dbus_service_property(dbus_interface, signature="v",
785
access="readwrite", byte_arrays=False):
1099
def dbus_service_property(dbus_interface,
786
1103
"""Decorators for marking methods of a DBusObjectWithProperties to
787
1104
become properties on the D-Bus.
882
1205
If called like _is_dbus_thing("method") it returns a function
883
1206
suitable for use as predicate to inspect.getmembers().
885
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1208
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
1211
def _get_all_dbus_things(self, thing):
889
1212
"""Returns a generator of (name, attribute) pairs
891
return ((getattr(athing.__get__(self), "_dbus_name",
1214
return ((getattr(athing.__get__(self), "_dbus_name", name),
893
1215
athing.__get__(self))
894
1216
for cls in self.__class__.__mro__
895
1217
for name, athing in
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
1218
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1220
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1224
def Introspect(self, object_path, connection):
1225
"""Overloading of standard D-Bus method.
1227
Inserts annotation tags on methods and signals.
1229
xmlstring = dbus.service.Object.Introspect(self, object_path,
1232
document = xml.dom.minidom.parseString(xmlstring)
1234
for if_tag in document.getElementsByTagName("interface"):
1235
# Add annotation tags
1236
for typ in ("method", "signal"):
1237
for tag in if_tag.getElementsByTagName(typ):
1239
for name, prop in (self.
1240
_get_all_dbus_things(typ)):
1241
if (name == tag.getAttribute("name")
1242
and prop._dbus_interface
1243
== if_tag.getAttribute("name")):
1244
annots.update(getattr(
1245
prop, "_dbus_annotations", {}))
1246
for name, value in annots.items():
1247
ann_tag = document.createElement(
1249
ann_tag.setAttribute("name", name)
1250
ann_tag.setAttribute("value", value)
1251
tag.appendChild(ann_tag)
1252
# Add interface annotation tags
1253
for annotation, value in dict(
1254
itertools.chain.from_iterable(
1255
annotations().items()
1256
for name, annotations
1257
in self._get_all_dbus_things("interface")
1258
if name == if_tag.getAttribute("name")
1260
ann_tag = document.createElement("annotation")
1261
ann_tag.setAttribute("name", annotation)
1262
ann_tag.setAttribute("value", value)
1263
if_tag.appendChild(ann_tag)
1264
# Fix argument name for the Introspect method itself
1265
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1267
for cn in if_tag.getElementsByTagName("method"):
1268
if cn.getAttribute("name") == "Introspect":
1269
for arg in cn.getElementsByTagName("arg"):
1270
if (arg.getAttribute("direction")
1272
arg.setAttribute("name",
1274
xmlstring = document.toxml("utf-8")
1276
except (AttributeError, xml.dom.DOMException,
1277
xml.parsers.expat.ExpatError) as error:
1278
logger.error("Failed to override Introspection method",
1283
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1284
"""A D-Bus object with properties.
1286
Classes inheriting from this can use the dbus_service_property
1287
decorator to expose methods as D-Bus properties. It exposes the
1288
standard Get(), Set(), and GetAll() methods on the D-Bus.
899
1291
def _get_dbus_property(self, interface_name, property_name):
900
1292
"""Returns a bound method if one exists which is a D-Bus
901
1293
property with the specified name and interface.
903
for cls in self.__class__.__mro__:
904
for name, value in (inspect.getmembers
906
self._is_dbus_thing("property"))):
1295
for cls in self.__class__.__mro__:
1296
for name, value in inspect.getmembers(
1297
cls, self._is_dbus_thing("property")):
907
1298
if (value._dbus_name == property_name
908
1299
and value._dbus_interface == interface_name):
909
1300
return value.__get__(self)
911
1302
# No such property
912
raise DBusPropertyNotFound(self.dbus_object_path + ":"
913
+ interface_name + "."
916
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1303
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
self.dbus_object_path, interface_name, property_name))
1307
def _get_all_interface_names(cls):
1308
"""Get a sequence of all interfaces supported by an object"""
1309
return (name for name in set(getattr(getattr(x, attr),
1310
"_dbus_interface", None)
1311
for x in (inspect.getmro(cls))
1313
if name is not None)
1315
@dbus.service.method(dbus.PROPERTIES_IFACE,
917
1317
out_signature="v")
918
1318
def Get(self, interface_name, property_name):
919
1319
"""Standard D-Bus property Get() method, see D-Bus standard.
1050
1447
exc_info=error)
1051
1448
return xmlstring
1451
dbus.OBJECT_MANAGER_IFACE
1452
except AttributeError:
1453
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1455
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
"""A D-Bus object with an ObjectManager.
1458
Classes inheriting from this exposes the standard
1459
GetManagedObjects call and the InterfacesAdded and
1460
InterfacesRemoved signals on the standard
1461
"org.freedesktop.DBus.ObjectManager" interface.
1463
Note: No signals are sent automatically; they must be sent
1466
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1468
def GetManagedObjects(self):
1469
"""This function must be overridden"""
1470
raise NotImplementedError()
1472
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1474
def InterfacesAdded(self, object_path, interfaces_and_properties):
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1478
def InterfacesRemoved(self, object_path, interfaces):
1481
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1485
def Introspect(self, object_path, connection):
1486
"""Overloading of standard D-Bus method.
1488
Override return argument name of GetManagedObjects to be
1489
"objpath_interfaces_and_properties"
1491
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1495
document = xml.dom.minidom.parseString(xmlstring)
1497
for if_tag in document.getElementsByTagName("interface"):
1498
# Fix argument name for the GetManagedObjects method
1499
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1501
for cn in if_tag.getElementsByTagName("method"):
1502
if (cn.getAttribute("name")
1503
== "GetManagedObjects"):
1504
for arg in cn.getElementsByTagName("arg"):
1505
if (arg.getAttribute("direction")
1509
"objpath_interfaces"
1511
xmlstring = document.toxml("utf-8")
1513
except (AttributeError, xml.dom.DOMException,
1514
xml.parsers.expat.ExpatError) as error:
1515
logger.error("Failed to override Introspection method",
1054
1519
def datetime_to_dbus(dt, variant_level=0):
1055
1520
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1057
1522
return dbus.String("", variant_level = variant_level)
1058
return dbus.String(dt.isoformat(),
1059
variant_level=variant_level)
1523
return dbus.String(dt.isoformat(), variant_level=variant_level)
1062
1526
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1092
1557
# Ignore non-D-Bus attributes, and D-Bus attributes
1093
1558
# with the wrong interface name
1094
1559
if (not hasattr(attribute, "_dbus_interface")
1095
or not attribute._dbus_interface
1096
.startswith(orig_interface_name)):
1560
or not attribute._dbus_interface.startswith(
1561
orig_interface_name)):
1098
1563
# Create an alternate D-Bus interface name based on
1099
1564
# the current name
1100
alt_interface = (attribute._dbus_interface
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1565
alt_interface = attribute._dbus_interface.replace(
1566
orig_interface_name, alt_interface_name)
1103
1567
interface_names.add(alt_interface)
1104
1568
# Is this a D-Bus signal?
1105
1569
if getattr(attribute, "_dbus_is_signal", False):
1106
1570
# Extract the original non-method undecorated
1107
1571
# function by black magic
1108
nonmethod_func = (dict(
1572
if sys.version_info.major == 2:
1573
nonmethod_func = (dict(
1109
1574
zip(attribute.func_code.co_freevars,
1110
attribute.__closure__))["func"]
1575
attribute.__closure__))
1576
["func"].cell_contents)
1578
nonmethod_func = (dict(
1579
zip(attribute.__code__.co_freevars,
1580
attribute.__closure__))
1581
["func"].cell_contents)
1112
1582
# Create a new, but exactly alike, function
1113
1583
# object, and decorate it to be a new D-Bus signal
1114
1584
# with the alternate D-Bus interface name
1115
new_function = (dbus.service.signal
1117
attribute._dbus_signature)
1118
(types.FunctionType(
1119
nonmethod_func.func_code,
1120
nonmethod_func.func_globals,
1121
nonmethod_func.func_name,
1122
nonmethod_func.func_defaults,
1123
nonmethod_func.func_closure)))
1585
new_function = copy_function(nonmethod_func)
1586
new_function = (dbus.service.signal(
1588
attribute._dbus_signature)(new_function))
1124
1589
# Copy annotations, if any
1126
new_function._dbus_annotations = (
1127
dict(attribute._dbus_annotations))
1591
new_function._dbus_annotations = dict(
1592
attribute._dbus_annotations)
1128
1593
except AttributeError:
1130
1595
# Define a creator of a function to call both the
1475
1954
self.approved_by_default = bool(value)
1477
1956
# ApprovalDelay - property
1478
@dbus_service_property(_interface, signature="t",
1957
@dbus_service_property(_interface,
1479
1959
access="readwrite")
1480
1960
def ApprovalDelay_dbus_property(self, value=None):
1481
1961
if value is None: # get
1482
return dbus.UInt64(self.approval_delay_milliseconds())
1962
return dbus.UInt64(self.approval_delay.total_seconds()
1483
1964
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1485
1966
# ApprovalDuration - property
1486
@dbus_service_property(_interface, signature="t",
1967
@dbus_service_property(_interface,
1487
1969
access="readwrite")
1488
1970
def ApprovalDuration_dbus_property(self, value=None):
1489
1971
if value is None: # get
1490
return dbus.UInt64(timedelta_to_milliseconds(
1491
self.approval_duration))
1972
return dbus.UInt64(self.approval_duration.total_seconds()
1492
1974
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1494
1976
# Name - property
1978
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1495
1979
@dbus_service_property(_interface, signature="s", access="read")
1496
1980
def Name_dbus_property(self):
1497
1981
return dbus.String(self.name)
1499
1983
# Fingerprint - property
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1500
1986
@dbus_service_property(_interface, signature="s", access="read")
1501
1987
def Fingerprint_dbus_property(self):
1502
1988
return dbus.String(self.fingerprint)
1504
1990
# Host - property
1505
@dbus_service_property(_interface, signature="s",
1991
@dbus_service_property(_interface,
1506
1993
access="readwrite")
1507
1994
def Host_dbus_property(self, value=None):
1508
1995
if value is None: # get
1509
1996
return dbus.String(self.host)
1510
self.host = unicode(value)
1997
self.host = str(value)
1512
1999
# Created - property
2001
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1513
2002
@dbus_service_property(_interface, signature="s", access="read")
1514
2003
def Created_dbus_property(self):
1515
2004
return datetime_to_dbus(self.created)
1574
2065
if (getattr(self, "disable_initiator_tag", None)
1577
gobject.source_remove(self.disable_initiator_tag)
1578
self.disable_initiator_tag = (
1579
gobject.timeout_add(
1580
timedelta_to_milliseconds(self.expires - now),
2068
GLib.source_remove(self.disable_initiator_tag)
2069
self.disable_initiator_tag = GLib.timeout_add(
2070
int((self.expires - now).total_seconds() * 1000),
1583
2073
# ExtendedTimeout - property
1584
@dbus_service_property(_interface, signature="t",
2074
@dbus_service_property(_interface,
1585
2076
access="readwrite")
1586
2077
def ExtendedTimeout_dbus_property(self, value=None):
1587
2078
if value is None: # get
1588
return dbus.UInt64(self.extended_timeout_milliseconds())
2079
return dbus.UInt64(self.extended_timeout.total_seconds()
1589
2081
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1591
2083
# Interval - property
1592
@dbus_service_property(_interface, signature="t",
2084
@dbus_service_property(_interface,
1593
2086
access="readwrite")
1594
2087
def Interval_dbus_property(self, value=None):
1595
2088
if value is None: # get
1596
return dbus.UInt64(self.interval_milliseconds())
2089
return dbus.UInt64(self.interval.total_seconds() * 1000)
1597
2090
self.interval = datetime.timedelta(0, 0, 0, value)
1598
2091
if getattr(self, "checker_initiator_tag", None) is None:
1600
2093
if self.enabled:
1601
2094
# Reschedule checker run
1602
gobject.source_remove(self.checker_initiator_tag)
1603
self.checker_initiator_tag = (gobject.timeout_add
1604
(value, self.start_checker))
1605
self.start_checker() # Start one now, too
2095
GLib.source_remove(self.checker_initiator_tag)
2096
self.checker_initiator_tag = GLib.timeout_add(
2097
value, self.start_checker)
2098
self.start_checker() # Start one now, too
1607
2100
# Checker - property
1608
@dbus_service_property(_interface, signature="s",
2101
@dbus_service_property(_interface,
1609
2103
access="readwrite")
1610
2104
def Checker_dbus_property(self, value=None):
1611
2105
if value is None: # get
1612
2106
return dbus.String(self.checker_command)
1613
self.checker_command = unicode(value)
2107
self.checker_command = str(value)
1615
2109
# CheckerRunning - property
1616
@dbus_service_property(_interface, signature="b",
2110
@dbus_service_property(_interface,
1617
2112
access="readwrite")
1618
2113
def CheckerRunning_dbus_property(self, value=None):
1619
2114
if value is None: # get
1845
2330
def fingerprint(openpgp):
1846
2331
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1847
2332
# New GnuTLS "datum" with the OpenPGP public key
1848
datum = (gnutls.library.types
1849
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1852
ctypes.c_uint(len(openpgp))))
2333
datum = gnutls.datum_t(
2334
ctypes.cast(ctypes.c_char_p(openpgp),
2335
ctypes.POINTER(ctypes.c_ubyte)),
2336
ctypes.c_uint(len(openpgp)))
1853
2337
# New empty GnuTLS certificate
1854
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1855
(gnutls.library.functions
1856
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2338
crt = gnutls.openpgp_crt_t()
2339
gnutls.openpgp_crt_init(ctypes.byref(crt))
1857
2340
# Import the OpenPGP public key into the certificate
1858
(gnutls.library.functions
1859
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1860
gnutls.library.constants
1861
.GNUTLS_OPENPGP_FMT_RAW))
2341
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2342
gnutls.OPENPGP_FMT_RAW)
1862
2343
# Verify the self signature in the key
1863
2344
crtverify = ctypes.c_uint()
1864
(gnutls.library.functions
1865
.gnutls_openpgp_crt_verify_self(crt, 0,
1866
ctypes.byref(crtverify)))
2345
gnutls.openpgp_crt_verify_self(crt, 0,
2346
ctypes.byref(crtverify))
1867
2347
if crtverify.value != 0:
1868
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1869
raise (gnutls.errors.CertificateSecurityError
2348
gnutls.openpgp_crt_deinit(crt)
2349
raise gnutls.CertificateSecurityError("Verify failed")
1871
2350
# New buffer for the fingerprint
1872
2351
buf = ctypes.create_string_buffer(20)
1873
2352
buf_len = ctypes.c_size_t()
1874
2353
# Get the fingerprint from the certificate into the buffer
1875
(gnutls.library.functions
1876
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1877
ctypes.byref(buf_len)))
2354
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2355
ctypes.byref(buf_len))
1878
2356
# Deinit the certificate
1879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2357
gnutls.openpgp_crt_deinit(crt)
1880
2358
# Convert the buffer to a Python bytestring
1881
2359
fpr = ctypes.string_at(buf, buf_len.value)
1882
2360
# Convert the bytestring to hexadecimal notation
1972
2455
bind to an address or port if they were not specified."""
1973
2456
if self.interface is not None:
1974
2457
if SO_BINDTODEVICE is None:
1975
logger.error("SO_BINDTODEVICE does not exist;"
1976
" cannot bind to interface %s",
1980
self.socket.setsockopt(socket.SOL_SOCKET,
1982
str(self.interface + '\0'))
1983
except socket.error as error:
1984
if error.errno == errno.EPERM:
1985
logger.error("No permission to bind to"
1986
" interface %s", self.interface)
1987
elif error.errno == errno.ENOPROTOOPT:
1988
logger.error("SO_BINDTODEVICE not available;"
1989
" cannot bind to interface %s",
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
2458
# Fall back to a hard-coded value which seems to be
2460
logger.warning("SO_BINDTODEVICE not found, trying 25")
2461
SO_BINDTODEVICE = 25
2463
self.socket.setsockopt(
2464
socket.SOL_SOCKET, SO_BINDTODEVICE,
2465
(self.interface + "\0").encode("utf-8"))
2466
except socket.error as error:
2467
if error.errno == errno.EPERM:
2468
logger.error("No permission to bind to"
2469
" interface %s", self.interface)
2470
elif error.errno == errno.ENOPROTOOPT:
2471
logger.error("SO_BINDTODEVICE not available;"
2472
" cannot bind to interface %s",
2474
elif error.errno == errno.ENODEV:
2475
logger.error("Interface %s does not exist,"
2476
" cannot bind", self.interface)
1996
2479
# Only bind(2) the socket if we really need to.
1997
2480
if self.server_address[0] or self.server_address[1]:
1998
2481
if not self.server_address[0]:
2523
3012
# Close all input and output, do double fork, etc.
2526
# multiprocessing will use threads, so before we use gobject we
2527
# need to inform gobject that threads will be used.
2528
gobject.threads_init()
3015
# multiprocessing will use threads, so before we use GLib we need
3016
# to inform GLib that threads will be used.
2530
3019
global main_loop
2531
3020
# From the Avahi example code
2532
3021
DBusGMainLoop(set_as_default=True)
2533
main_loop = gobject.MainLoop()
3022
main_loop = GLib.MainLoop()
2534
3023
bus = dbus.SystemBus()
2535
3024
# End of Avahi example code
2538
3027
bus_name = dbus.service.BusName("se.recompile.Mandos",
2539
bus, do_not_queue=True)
2540
old_bus_name = (dbus.service.BusName
2541
("se.bsnet.fukt.Mandos", bus,
2543
except dbus.exceptions.NameExistsException as e:
3030
old_bus_name = dbus.service.BusName(
3031
"se.bsnet.fukt.Mandos", bus,
3033
except dbus.exceptions.DBusException as e:
2544
3034
logger.error("Disabling D-Bus:", exc_info=e)
2545
3035
use_dbus = False
2546
3036
server_settings["use_dbus"] = False
2547
3037
tcp_server.use_dbus = False
2549
3039
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
service = AvahiServiceToSyslog(name =
2551
server_settings["servicename"],
2552
servicetype = "_mandos._tcp",
2553
protocol = protocol, bus = bus)
3040
service = AvahiServiceToSyslog(
3041
name = server_settings["servicename"],
3042
servicetype = "_mandos._tcp",
3043
protocol = protocol,
2554
3045
if server_settings["interface"]:
2555
service.interface = (if_nametoindex
2556
(str(server_settings["interface"])))
3046
service.interface = if_nametoindex(
3047
server_settings["interface"].encode("utf-8"))
2558
3049
global multiprocessing_manager
2559
3050
multiprocessing_manager = multiprocessing.Manager()
2578
3069
if server_settings["restore"]:
2580
3071
with open(stored_state_path, "rb") as stored_state:
2581
clients_data, old_client_settings = (pickle.load
3072
if sys.version_info.major == 2:
3073
clients_data, old_client_settings = pickle.load(
3076
bytes_clients_data, bytes_old_client_settings = (
3077
pickle.load(stored_state, encoding = "bytes"))
3078
### Fix bytes to strings
3081
clients_data = { (key.decode("utf-8")
3082
if isinstance(key, bytes)
3085
bytes_clients_data.items() }
3086
del bytes_clients_data
3087
for key in clients_data:
3088
value = { (k.decode("utf-8")
3089
if isinstance(k, bytes) else k): v
3091
clients_data[key].items() }
3092
clients_data[key] = value
3094
value["client_structure"] = [
3096
if isinstance(s, bytes)
3098
value["client_structure"] ]
3100
for k in ("name", "host"):
3101
if isinstance(value[k], bytes):
3102
value[k] = value[k].decode("utf-8")
3103
## old_client_settings
3105
old_client_settings = {
3106
(key.decode("utf-8")
3107
if isinstance(key, bytes)
3110
bytes_old_client_settings.items() }
3111
del bytes_old_client_settings
3113
for value in old_client_settings.values():
3114
if isinstance(value["host"], bytes):
3115
value["host"] = (value["host"]
2583
3117
os.remove(stored_state_path)
2584
3118
except IOError as e:
2585
3119
if e.errno == errno.ENOENT:
2586
logger.warning("Could not load persistent state: {0}"
2587
.format(os.strerror(e.errno)))
3120
logger.warning("Could not load persistent state:"
3121
" {}".format(os.strerror(e.errno)))
2589
3123
logger.critical("Could not load persistent state:",
2592
3126
except EOFError as e:
2593
3127
logger.warning("Could not load persistent state: "
2594
"EOFError:", exc_info=e)
2596
3131
with PGPEngine() as pgp:
2597
for client_name, client in clients_data.iteritems():
3132
for client_name, client in clients_data.items():
2598
3133
# Skip removed clients
2599
3134
if client_name not in client_settings:
3249
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2715
3251
@dbus.service.signal(_interface, signature="os")
2716
3252
def ClientRemoved(self, objpath, name):
3256
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2720
3258
@dbus.service.method(_interface, out_signature="ao")
2721
3259
def GetAllClients(self):
2723
return dbus.Array(c.dbus_object_path
2725
tcp_server.clients.itervalues())
3261
return dbus.Array(c.dbus_object_path for c in
3262
tcp_server.clients.values())
3264
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2727
3266
@dbus.service.method(_interface,
2728
3267
out_signature="a{oa{sv}}")
2729
3268
def GetAllClientsWithProperties(self):
2731
3270
return dbus.Dictionary(
2732
((c.dbus_object_path, c.GetAll(""))
2733
for c in tcp_server.clients.itervalues()),
3271
{ c.dbus_object_path: c.GetAll(
3272
"se.recompile.Mandos.Client")
3273
for c in tcp_server.clients.values() },
2734
3274
signature="oa{sv}")
2736
3276
@dbus.service.method(_interface, in_signature="o")
2737
3277
def RemoveClient(self, object_path):
2739
for c in tcp_server.clients.itervalues():
3279
for c in tcp_server.clients.values():
2740
3280
if c.dbus_object_path == object_path:
2741
3281
del tcp_server.clients[c.name]
2742
3282
c.remove_from_connection()
2743
# Don't signal anything except ClientRemoved
3283
# Don't signal the disabling
2744
3284
c.disable(quiet=True)
2746
self.ClientRemoved(object_path, c.name)
3285
# Emit D-Bus signal for removal
3286
self.client_removed_signal(c)
2748
3288
raise KeyError(object_path)
3292
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3293
out_signature = "a{oa{sa{sv}}}")
3294
def GetManagedObjects(self):
3296
return dbus.Dictionary(
3297
{ client.dbus_object_path:
3299
{ interface: client.GetAll(interface)
3301
client._get_all_interface_names()})
3302
for client in tcp_server.clients.values()})
3304
def client_added_signal(self, client):
3305
"""Send the new standard signal and the old signal"""
3307
# New standard signal
3308
self.InterfacesAdded(
3309
client.dbus_object_path,
3311
{ interface: client.GetAll(interface)
3313
client._get_all_interface_names()}))
3315
self.ClientAdded(client.dbus_object_path)
3317
def client_removed_signal(self, client):
3318
"""Send the new standard signal and the old signal"""
3320
# New standard signal
3321
self.InterfacesRemoved(
3322
client.dbus_object_path,
3323
client._get_all_interface_names())
3325
self.ClientRemoved(client.dbus_object_path,
2752
3328
mandos_dbus_service = MandosDBusService()
3330
# Save modules to variables to exempt the modules from being
3331
# unloaded before the function registered with atexit() is run.
3332
mp = multiprocessing
2755
3335
"Cleanup function; run on exit"
2757
3337
service.cleanup()
2759
multiprocessing.active_children()
3339
mp.active_children()
2761
3341
if not (tcp_server.clients or client_settings):