69
import cPickle as pickle
63
import cPickle as pickle
72
64
import multiprocessing
81
71
import dbus.service
82
from gi.repository import GLib
83
74
from dbus.mainloop.glib import DBusGMainLoop
86
77
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:
93
82
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
83
except AttributeError:
96
# This is where SO_BINDTODEVICE was up to and including Python
98
85
from IN import SO_BINDTODEVICE
99
86
except ImportError:
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:
87
SO_BINDTODEVICE = None
118
90
stored_state_file = "clients.pickle"
120
92
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
126
101
except (OSError, AttributeError):
128
102
def if_nametoindex(interface):
129
103
"Get an interface index the hard way, i.e. using fcntl()"
130
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
105
with contextlib.closing(socket.socket()) as s:
132
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
135
111
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__,
154
114
def initlogger(debug, level=logging.WARNING):
155
115
"""init logger and add loglevel"""
158
syslogger = (logging.handlers.SysLogHandler(
159
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
160
address = "/dev/log"))
161
117
syslogger.setFormatter(logging.Formatter
162
118
('Mandos [%(process)d]: %(levelname)s:'
228
172
def password_encode(self, password):
229
173
# Passphrase can not be empty and can not contain newlines or
230
174
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
175
return b"mandos" + binascii.hexlify(password)
239
177
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
245
proc = subprocess.Popen([self.gpg, '--symmetric',
249
stdin = subprocess.PIPE,
250
stdout = subprocess.PIPE,
251
stderr = subprocess.PIPE)
252
ciphertext, err = proc.communicate(input = data)
253
if proc.returncode != 0:
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
191
self.gnupg.passphrase = None
255
192
return ciphertext
257
194
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir = self.tempdir) as passfile:
261
passfile.write(passphrase)
263
proc = subprocess.Popen([self.gpg, '--decrypt',
267
stdin = subprocess.PIPE,
268
stdout = subprocess.PIPE,
269
stderr = subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input = data)
271
if proc.returncode != 0:
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
208
self.gnupg.passphrase = None
273
209
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
300
213
class AvahiError(Exception):
301
214
def __init__(self, value, *args, **kwargs):
302
215
self.value = value
303
return super(AvahiError, self).__init__(value, *args,
216
super(AvahiError, self).__init__(value, *args, **kwargs)
217
def __unicode__(self):
218
return unicode(repr(self.value))
307
220
class AvahiServiceError(AvahiError):
311
223
class AvahiGroupError(AvahiError):
485
367
follow_name_owner_changes=True),
486
368
avahi.DBUS_INTERFACE_SERVER)
487
369
self.server.connect_to_signal("StateChanged",
488
self.server_state_changed)
370
self.server_state_changed)
489
371
self.server_state_changed(self.server.GetState())
492
373
class AvahiServiceToSyslog(AvahiService):
493
def rename(self, *args, **kwargs):
494
375
"""Add the new name to the syslog messages"""
495
ret = AvahiService.rename(self, *args, **kwargs)
496
syslogger.setFormatter(logging.Formatter(
497
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
376
ret = AvahiService.rename(self)
377
syslogger.setFormatter(logging.Formatter
378
('Mandos ({0}) [%(process)d]:'
379
' %(levelname)s: %(message)s'
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))
383
def timedelta_to_milliseconds(td):
384
"Convert a datetime.timedelta() to milliseconds"
385
return ((td.days * 24 * 60 * 60 * 1000)
386
+ (td.seconds * 1000)
387
+ (td.microseconds // 1000))
766
389
class Client(object):
767
390
"""A representation of a client host served by this server.
806
427
runtime_expansions: Allowed attributes for runtime expansion.
807
428
expires: datetime.datetime(); time (UTC) when a client will be
808
429
disabled, or None
809
server_settings: The server_settings dict from main()
812
432
runtime_expansions = ("approval_delay", "approval_duration",
813
"created", "enabled", "expires",
814
"fingerprint", "host", "interval",
815
"last_approval_request", "last_checked_ok",
433
"created", "enabled", "fingerprint",
434
"host", "interval", "last_checked_ok",
816
435
"last_enabled", "name", "timeout")
819
"extended_timeout": "PT15M",
821
"checker": "fping -q -- %%(host)s",
823
"approval_delay": "PT0S",
824
"approval_duration": "PT1S",
825
"approved_by_default": "True",
436
client_defaults = { "timeout": "5m",
437
"extended_timeout": "15m",
439
"checker": "fping -q -- %%(host)s",
441
"approval_delay": "0s",
442
"approval_duration": "1s",
443
"approved_by_default": "True",
447
def timeout_milliseconds(self):
448
"Return the 'timeout' attribute in milliseconds"
449
return timedelta_to_milliseconds(self.timeout)
451
def extended_timeout_milliseconds(self):
452
"Return the 'extended_timeout' attribute in milliseconds"
453
return timedelta_to_milliseconds(self.extended_timeout)
455
def interval_milliseconds(self):
456
"Return the 'interval' attribute in milliseconds"
457
return timedelta_to_milliseconds(self.interval)
459
def approval_delay_milliseconds(self):
460
return timedelta_to_milliseconds(self.approval_delay)
830
463
def config_parser(config):
831
464
"""Construct a new dict of client settings of this form:
964
599
def init_checker(self):
965
600
# Schedule a new checker to be started an 'interval' from now,
966
601
# and every interval from then on.
967
if self.checker_initiator_tag is not None:
968
GLib.source_remove(self.checker_initiator_tag)
969
self.checker_initiator_tag = GLib.timeout_add(
970
int(self.interval.total_seconds() * 1000),
602
self.checker_initiator_tag = (gobject.timeout_add
603
(self.interval_milliseconds(),
972
605
# Schedule a disable() when 'timeout' has passed
973
if self.disable_initiator_tag is not None:
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)
606
self.disable_initiator_tag = (gobject.timeout_add
607
(self.timeout_milliseconds(),
977
609
# Also start a new checker *right now*.
978
610
self.start_checker()
980
def checker_callback(self, source, condition, connection,
612
def checker_callback(self, pid, condition, command):
982
613
"""The checker has completed, so take appropriate actions."""
983
614
self.checker_callback_tag = None
984
615
self.checker = None
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
616
if os.WIFEXITED(condition):
617
self.last_checker_status = os.WEXITSTATUS(condition)
992
618
if self.last_checker_status == 0:
993
619
logger.info("Checker for %(name)s succeeded",
995
621
self.checked_ok()
997
logger.info("Checker for %(name)s failed", vars(self))
623
logger.info("Checker for %(name)s failed",
999
626
self.last_checker_status = -1
1000
self.last_checker_signal = -returncode
1001
627
logger.warning("Checker for %(name)s crashed?",
1005
630
def checked_ok(self):
1006
631
"""Assert that the client has been seen, alive and well."""
1007
632
self.last_checked_ok = datetime.datetime.utcnow()
1008
633
self.last_checker_status = 0
1009
self.last_checker_signal = None
1010
634
self.bump_timeout()
1012
636
def bump_timeout(self, timeout=None):
1030
654
If a checker already exists, leave it running and do
1032
656
# The reason for not killing a running checker is that if we
1033
# did that, and if a checker (for some reason) started running
1034
# slowly and taking more than 'interval' time, then the client
1035
# would inevitably timeout, since no checker would get a
1036
# chance to run to completion. If we instead leave running
657
# did that, then if a checker (for some reason) started
658
# running slowly and taking more than 'interval' time, the
659
# client would inevitably timeout, since no checker would get
660
# a chance to run to completion. If we instead leave running
1037
661
# checkers alone, the checker would have to take more time
1038
662
# than 'timeout' for the client to be disabled, which is as it
1041
if self.checker is not None and not self.checker.is_alive():
1042
logger.warning("Checker was not alive; joining")
665
# If a checker exists, make sure it is not a zombie
667
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
668
except (AttributeError, OSError) as error:
669
if (isinstance(error, OSError)
670
and error.errno != errno.ECHILD):
674
logger.warning("Checker was a zombie")
675
gobject.source_remove(self.checker_callback_tag)
676
self.checker_callback(pid, status,
677
self.current_checker_command)
1045
678
# Start a new checker if needed
1046
679
if self.checker is None:
1047
# Escape attributes for the shell
1049
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
1052
command = self.checker_command % escaped_attrs
1053
except TypeError as error:
1054
logger.error('Could not format string "%s"',
1055
self.checker_command,
681
# In case checker_command has exactly one % operator
682
command = self.checker_command % self.host
684
# Escape attributes for the shell
685
escaped_attrs = dict(
687
re.escape(unicode(str(getattr(self, attr, "")),
691
self.runtime_expansions)
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
699
self.current_checker_command = command
701
logger.info("Starting checker %r for %s",
703
# We don't need to redirect stdout and stderr, since
704
# in normal mode, that is already done by daemon(),
705
# and in debug mode we don't want to. (Stdin is
706
# always replaced by /dev/null.)
707
self.checker = subprocess.Popen(command,
710
self.checker_callback_tag = (gobject.child_watch_add
712
self.checker_callback,
714
# The checker may have completed before the gobject
715
# watch was added. Check for this.
716
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
718
gobject.source_remove(self.checker_callback_tag)
719
self.checker_callback(pid, status, command)
720
except OSError as error:
721
logger.error("Failed to start subprocess",
1057
return True # Try again later
1058
self.current_checker_command = command
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
723
# Re-run this periodically if run by gobject.timeout_add
1087
726
def stop_checker(self):
1088
727
"""Force the checker process, if any, to stop."""
1089
728
if self.checker_callback_tag:
1090
GLib.source_remove(self.checker_callback_tag)
729
gobject.source_remove(self.checker_callback_tag)
1091
730
self.checker_callback_tag = None
1092
731
if getattr(self, "checker", None) is None:
1094
733
logger.debug("Stopping checker for %(name)s", vars(self))
1095
self.checker.terminate()
735
self.checker.terminate()
737
#if self.checker.poll() is None:
738
# self.checker.kill()
739
except OSError as error:
740
if error.errno != errno.ESRCH: # No such process
1096
742
self.checker = None
1099
def dbus_service_property(dbus_interface,
745
def dbus_service_property(dbus_interface, signature="v",
746
access="readwrite", byte_arrays=False):
1103
747
"""Decorators for marking methods of a DBusObjectWithProperties to
1104
748
become properties on the D-Bus.
1205
843
If called like _is_dbus_thing("method") it returns a function
1206
844
suitable for use as predicate to inspect.getmembers().
1208
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
846
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1211
849
def _get_all_dbus_things(self, thing):
1212
850
"""Returns a generator of (name, attribute) pairs
1214
return ((getattr(athing.__get__(self), "_dbus_name", name),
852
return ((getattr(athing.__get__(self), "_dbus_name",
1215
854
athing.__get__(self))
1216
855
for cls in self.__class__.__mro__
1217
856
for name, athing in
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.
857
inspect.getmembers(cls,
858
self._is_dbus_thing(thing)))
1291
860
def _get_dbus_property(self, interface_name, property_name):
1292
861
"""Returns a bound method if one exists which is a D-Bus
1293
862
property with the specified name and interface.
1295
for cls in self.__class__.__mro__:
1296
for name, value in inspect.getmembers(
1297
cls, self._is_dbus_thing("property")):
864
for cls in self.__class__.__mro__:
865
for name, value in (inspect.getmembers
867
self._is_dbus_thing("property"))):
1298
868
if (value._dbus_name == property_name
1299
869
and value._dbus_interface == interface_name):
1300
870
return value.__get__(self)
1302
872
# No such property
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,
873
raise DBusPropertyNotFound(self.dbus_object_path + ":"
874
+ interface_name + "."
877
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1317
878
out_signature="v")
1318
879
def Get(self, interface_name, property_name):
1319
880
"""Standard D-Bus property Get() method, see D-Bus standard.
1447
1009
exc_info=error)
1448
1010
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",
1519
def datetime_to_dbus(dt, variant_level=0):
1013
def datetime_to_dbus (dt, variant_level=0):
1520
1014
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1522
1016
return dbus.String("", variant_level = variant_level)
1523
return dbus.String(dt.isoformat(), variant_level=variant_level)
1526
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1527
"""A class decorator; applied to a subclass of
1528
dbus.service.Object, it will add alternate D-Bus attributes with
1529
interface names according to the "alt_interface_names" mapping.
1532
@alternate_dbus_interfaces({"org.example.Interface":
1533
"net.example.AlternateInterface"})
1534
class SampleDBusObject(dbus.service.Object):
1535
@dbus.service.method("org.example.Interface")
1536
def SampleDBusMethod():
1539
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
reachable via two interfaces: "org.example.Interface" and
1541
"net.example.AlternateInterface", the latter of which will have
1542
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
"true", unless "deprecate" is passed with a False value.
1545
This works for methods and signals, and also for D-Bus properties
1546
(from DBusObjectWithProperties) and interfaces (from the
1547
dbus_interface_annotations decorator).
1017
return dbus.String(dt.isoformat(),
1018
variant_level=variant_level)
1021
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1023
"""Applied to an empty subclass of a D-Bus object, this metaclass
1024
will add additional D-Bus attributes matching a certain pattern.
1551
for orig_interface_name, alt_interface_name in (
1552
alt_interface_names.items()):
1554
interface_names = set()
1555
# Go though all attributes of the class
1556
for attrname, attribute in inspect.getmembers(cls):
1026
def __new__(mcs, name, bases, attr):
1027
# Go through all the base classes which could have D-Bus
1028
# methods, signals, or properties in them
1029
old_interface_names = []
1030
for base in (b for b in bases
1031
if issubclass(b, dbus.service.Object)):
1032
# Go though all attributes of the base class
1033
for attrname, attribute in inspect.getmembers(base):
1557
1034
# Ignore non-D-Bus attributes, and D-Bus attributes
1558
1035
# with the wrong interface name
1559
1036
if (not hasattr(attribute, "_dbus_interface")
1560
or not attribute._dbus_interface.startswith(
1561
orig_interface_name)):
1037
or not attribute._dbus_interface
1038
.startswith("se.recompile.Mandos")):
1563
1040
# Create an alternate D-Bus interface name based on
1564
1041
# the current name
1565
alt_interface = attribute._dbus_interface.replace(
1566
orig_interface_name, alt_interface_name)
1567
interface_names.add(alt_interface)
1042
alt_interface = (attribute._dbus_interface
1043
.replace("se.recompile.Mandos",
1044
"se.bsnet.fukt.Mandos"))
1045
if alt_interface != attribute._dbus_interface:
1046
old_interface_names.append(alt_interface)
1568
1047
# Is this a D-Bus signal?
1569
1048
if getattr(attribute, "_dbus_is_signal", False):
1570
# Extract the original non-method undecorated
1571
# function by black magic
1572
if sys.version_info.major == 2:
1573
nonmethod_func = (dict(
1049
# Extract the original non-method function by
1051
nonmethod_func = (dict(
1574
1052
zip(attribute.func_code.co_freevars,
1575
attribute.__closure__))
1576
["func"].cell_contents)
1578
nonmethod_func = (dict(
1579
zip(attribute.__code__.co_freevars,
1580
attribute.__closure__))
1581
["func"].cell_contents)
1053
attribute.__closure__))["func"]
1582
1055
# Create a new, but exactly alike, function
1583
1056
# object, and decorate it to be a new D-Bus signal
1584
1057
# with the alternate D-Bus interface name
1585
new_function = copy_function(nonmethod_func)
1586
new_function = (dbus.service.signal(
1588
attribute._dbus_signature)(new_function))
1058
new_function = (dbus.service.signal
1060
attribute._dbus_signature)
1061
(types.FunctionType(
1062
nonmethod_func.func_code,
1063
nonmethod_func.func_globals,
1064
nonmethod_func.func_name,
1065
nonmethod_func.func_defaults,
1066
nonmethod_func.func_closure)))
1589
1067
# Copy annotations, if any
1591
new_function._dbus_annotations = dict(
1592
attribute._dbus_annotations)
1069
new_function._dbus_annotations = (
1070
dict(attribute._dbus_annotations))
1593
1071
except AttributeError:
1595
1073
# Define a creator of a function to call both the
1596
# original and alternate functions, so both the
1597
# original and alternate signals gets sent when
1598
# the function is called
1074
# old and new functions, so both the old and new
1075
# signals gets sent when the function is called
1599
1076
def fixscope(func1, func2):
1600
1077
"""This function is a scope container to pass
1601
1078
func1 and func2 to the "call_both" function
1602
1079
outside of its arguments"""
1604
@functools.wraps(func2)
1605
1080
def call_both(*args, **kwargs):
1606
1081
"""This function will emit two D-Bus
1607
1082
signals by calling func1 and func2"""
1608
1083
func1(*args, **kwargs)
1609
1084
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1611
for name, attr in inspect.getmembers(func2):
1612
if name.startswith("_dbus_"):
1613
setattr(call_both, name, attr)
1615
1085
return call_both
1616
1086
# Create the "call_both" function and add it to
1618
attr[attrname] = fixscope(attribute, new_function)
1088
attr[attrname] = fixscope(attribute,
1619
1090
# Is this a D-Bus method?
1620
1091
elif getattr(attribute, "_dbus_is_method", False):
1621
1092
# Create a new, but exactly alike, function
1622
1093
# object. Decorate it to be a new D-Bus method
1623
1094
# with the alternate D-Bus interface name. Add it
1624
1095
# to the class.
1626
dbus.service.method(
1628
attribute._dbus_in_signature,
1629
attribute._dbus_out_signature)
1630
(copy_function(attribute)))
1096
attr[attrname] = (dbus.service.method
1098
attribute._dbus_in_signature,
1099
attribute._dbus_out_signature)
1101
(attribute.func_code,
1102
attribute.func_globals,
1103
attribute.func_name,
1104
attribute.func_defaults,
1105
attribute.func_closure)))
1631
1106
# Copy annotations, if any
1633
attr[attrname]._dbus_annotations = dict(
1634
attribute._dbus_annotations)
1108
attr[attrname]._dbus_annotations = (
1109
dict(attribute._dbus_annotations))
1635
1110
except AttributeError:
1637
1112
# Is this a D-Bus property?
1810
1267
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1811
1268
Client.__del__(self, *args, **kwargs)
1813
def checker_callback(self, source, condition,
1814
connection, command, *args, **kwargs):
1815
ret = Client.checker_callback(self, source, condition,
1816
connection, command, *args,
1818
exitstatus = self.last_checker_status
1270
def checker_callback(self, pid, condition, command,
1272
self.checker_callback_tag = None
1274
if os.WIFEXITED(condition):
1275
exitstatus = os.WEXITSTATUS(condition)
1820
1276
# Emit D-Bus signal
1821
1277
self.CheckerCompleted(dbus.Int16(exitstatus),
1822
# This is specific to GNU libC
1823
dbus.Int64(exitstatus << 8),
1278
dbus.Int64(condition),
1824
1279
dbus.String(command))
1826
1281
# Emit D-Bus signal
1827
1282
self.CheckerCompleted(dbus.Int16(-1),
1829
# This is specific to GNU libC
1831
| self.last_checker_signal),
1283
dbus.Int64(condition),
1832
1284
dbus.String(command))
1286
return Client.checker_callback(self, pid, condition, command,
1835
1289
def start_checker(self, *args, **kwargs):
1836
old_checker_pid = getattr(self.checker, "pid", None)
1290
old_checker = self.checker
1291
if self.checker is not None:
1292
old_checker_pid = self.checker.pid
1294
old_checker_pid = None
1837
1295
r = Client.start_checker(self, *args, **kwargs)
1838
1296
# Only if new checker process was started
1839
1297
if (self.checker is not None
1954
1414
self.approved_by_default = bool(value)
1956
1416
# ApprovalDelay - property
1957
@dbus_service_property(_interface,
1417
@dbus_service_property(_interface, signature="t",
1959
1418
access="readwrite")
1960
1419
def ApprovalDelay_dbus_property(self, value=None):
1961
1420
if value is None: # get
1962
return dbus.UInt64(self.approval_delay.total_seconds()
1421
return dbus.UInt64(self.approval_delay_milliseconds())
1964
1422
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1966
1424
# ApprovalDuration - property
1967
@dbus_service_property(_interface,
1425
@dbus_service_property(_interface, signature="t",
1969
1426
access="readwrite")
1970
1427
def ApprovalDuration_dbus_property(self, value=None):
1971
1428
if value is None: # get
1972
return dbus.UInt64(self.approval_duration.total_seconds()
1429
return dbus.UInt64(timedelta_to_milliseconds(
1430
self.approval_duration))
1974
1431
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1976
1433
# Name - property
1978
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1979
1434
@dbus_service_property(_interface, signature="s", access="read")
1980
1435
def Name_dbus_property(self):
1981
1436
return dbus.String(self.name)
1983
1438
# Fingerprint - property
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
1439
@dbus_service_property(_interface, signature="s", access="read")
1987
1440
def Fingerprint_dbus_property(self):
1988
1441
return dbus.String(self.fingerprint)
1990
1443
# Host - property
1991
@dbus_service_property(_interface,
1444
@dbus_service_property(_interface, signature="s",
1993
1445
access="readwrite")
1994
1446
def Host_dbus_property(self, value=None):
1995
1447
if value is None: # get
1996
1448
return dbus.String(self.host)
1997
self.host = str(value)
1449
self.host = unicode(value)
1999
1451
# Created - property
2001
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2002
1452
@dbus_service_property(_interface, signature="s", access="read")
2003
1453
def Created_dbus_property(self):
2004
1454
return datetime_to_dbus(self.created)
2046
1495
return datetime_to_dbus(self.last_approval_request)
2048
1497
# Timeout - property
2049
@dbus_service_property(_interface,
1498
@dbus_service_property(_interface, signature="t",
2051
1499
access="readwrite")
2052
1500
def Timeout_dbus_property(self, value=None):
2053
1501
if value is None: # get
2054
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2055
old_timeout = self.timeout
1502
return dbus.UInt64(self.timeout_milliseconds())
2056
1503
self.timeout = datetime.timedelta(0, 0, 0, value)
2057
# Reschedule disabling
1504
# Reschedule timeout
2058
1505
if self.enabled:
2059
1506
now = datetime.datetime.utcnow()
2060
self.expires += self.timeout - old_timeout
2061
if self.expires <= now:
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
2062
1510
# The timeout has passed
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
2065
1516
if (getattr(self, "disable_initiator_tag", None)
2068
GLib.source_remove(self.disable_initiator_tag)
2069
self.disable_initiator_tag = GLib.timeout_add(
2070
int((self.expires - now).total_seconds() * 1000),
1519
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
2073
1524
# ExtendedTimeout - property
2074
@dbus_service_property(_interface,
1525
@dbus_service_property(_interface, signature="t",
2076
1526
access="readwrite")
2077
1527
def ExtendedTimeout_dbus_property(self, value=None):
2078
1528
if value is None: # get
2079
return dbus.UInt64(self.extended_timeout.total_seconds()
1529
return dbus.UInt64(self.extended_timeout_milliseconds())
2081
1530
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2083
1532
# Interval - property
2084
@dbus_service_property(_interface,
1533
@dbus_service_property(_interface, signature="t",
2086
1534
access="readwrite")
2087
1535
def Interval_dbus_property(self, value=None):
2088
1536
if value is None: # get
2089
return dbus.UInt64(self.interval.total_seconds() * 1000)
1537
return dbus.UInt64(self.interval_milliseconds())
2090
1538
self.interval = datetime.timedelta(0, 0, 0, value)
2091
1539
if getattr(self, "checker_initiator_tag", None) is None:
2093
1541
if self.enabled:
2094
1542
# Reschedule checker run
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
1543
gobject.source_remove(self.checker_initiator_tag)
1544
self.checker_initiator_tag = (gobject.timeout_add
1545
(value, self.start_checker))
1546
self.start_checker() # Start one now, too
2100
1548
# Checker - property
2101
@dbus_service_property(_interface,
1549
@dbus_service_property(_interface, signature="s",
2103
1550
access="readwrite")
2104
1551
def Checker_dbus_property(self, value=None):
2105
1552
if value is None: # get
2106
1553
return dbus.String(self.checker_command)
2107
self.checker_command = str(value)
1554
self.checker_command = unicode(value)
2109
1556
# CheckerRunning - property
2110
@dbus_service_property(_interface,
1557
@dbus_service_property(_interface, signature="b",
2112
1558
access="readwrite")
2113
1559
def CheckerRunning_dbus_property(self, value=None):
2114
1560
if value is None: # get
2330
1788
def fingerprint(openpgp):
2331
1789
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2332
1790
# New GnuTLS "datum" with the OpenPGP public key
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)))
1791
datum = (gnutls.library.types
1792
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1795
ctypes.c_uint(len(openpgp))))
2337
1796
# New empty GnuTLS certificate
2338
crt = gnutls.openpgp_crt_t()
2339
gnutls.openpgp_crt_init(ctypes.byref(crt))
1797
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1798
(gnutls.library.functions
1799
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2340
1800
# Import the OpenPGP public key into the certificate
2341
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2342
gnutls.OPENPGP_FMT_RAW)
1801
(gnutls.library.functions
1802
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1803
gnutls.library.constants
1804
.GNUTLS_OPENPGP_FMT_RAW))
2343
1805
# Verify the self signature in the key
2344
1806
crtverify = ctypes.c_uint()
2345
gnutls.openpgp_crt_verify_self(crt, 0,
2346
ctypes.byref(crtverify))
1807
(gnutls.library.functions
1808
.gnutls_openpgp_crt_verify_self(crt, 0,
1809
ctypes.byref(crtverify)))
2347
1810
if crtverify.value != 0:
2348
gnutls.openpgp_crt_deinit(crt)
2349
raise gnutls.CertificateSecurityError("Verify failed")
1811
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1812
raise (gnutls.errors.CertificateSecurityError
2350
1814
# New buffer for the fingerprint
2351
1815
buf = ctypes.create_string_buffer(20)
2352
1816
buf_len = ctypes.c_size_t()
2353
1817
# Get the fingerprint from the certificate into the buffer
2354
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2355
ctypes.byref(buf_len))
1818
(gnutls.library.functions
1819
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1820
ctypes.byref(buf_len)))
2356
1821
# Deinit the certificate
2357
gnutls.openpgp_crt_deinit(crt)
1822
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2358
1823
# Convert the buffer to a Python bytestring
2359
1824
fpr = ctypes.string_at(buf, buf_len.value)
2360
1825
# Convert the bytestring to hexadecimal notation
2409
1873
interface: None or a network interface name (string)
2410
1874
use_ipv6: Boolean; to use IPv6 or not
2413
1876
def __init__(self, server_address, RequestHandlerClass,
2417
"""If socketfd is set, use that file descriptor instead of
2418
creating a new one with socket.socket().
1877
interface=None, use_ipv6=True):
2420
1878
self.interface = interface
2422
1880
self.address_family = socket.AF_INET6
2423
if socketfd is not None:
2424
# Save the file descriptor
2425
self.socketfd = socketfd
2426
# Save the original socket.socket() function
2427
self.socket_socket = socket.socket
2428
# To implement --socket, we monkey patch socket.socket.
2430
# (When socketserver.TCPServer is a new-style class, we
2431
# could make self.socket into a property instead of monkey
2432
# patching socket.socket.)
2434
# Create a one-time-only replacement for socket.socket()
2435
@functools.wraps(socket.socket)
2436
def socket_wrapper(*args, **kwargs):
2437
# Restore original function so subsequent calls are
2439
socket.socket = self.socket_socket
2440
del self.socket_socket
2441
# This time only, return a new socket object from the
2442
# saved file descriptor.
2443
return socket.fromfd(self.socketfd, *args, **kwargs)
2444
# Replace socket.socket() function with wrapper
2445
socket.socket = socket_wrapper
2446
# The socketserver.TCPServer.__init__ will call
2447
# socket.socket(), which might be our replacement,
2448
# socket_wrapper(), if socketfd was set.
2449
1881
socketserver.TCPServer.__init__(self, server_address,
2450
1882
RequestHandlerClass)
2452
1883
def server_bind(self):
2453
1884
"""This overrides the normal server_bind() function
2454
1885
to bind to an interface if one was specified, and also NOT to
2455
1886
bind to an address or port if they were not specified."""
2456
1887
if self.interface is not None:
2457
1888
if SO_BINDTODEVICE is None:
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)
1889
logger.error("SO_BINDTODEVICE does not exist;"
1890
" cannot bind to interface %s",
1894
self.socket.setsockopt(socket.SOL_SOCKET,
1898
except socket.error as error:
1899
if error[0] == errno.EPERM:
1900
logger.error("No permission to"
1901
" bind to interface %s",
1903
elif error[0] == errno.ENOPROTOOPT:
1904
logger.error("SO_BINDTODEVICE not available;"
1905
" cannot bind to interface %s",
2479
1909
# Only bind(2) the socket if we really need to.
2480
1910
if self.server_address[0] or self.server_address[1]:
2481
1911
if not self.server_address[0]:
2482
1912
if self.address_family == socket.AF_INET6:
2483
1913
any_address = "::" # in6addr_any
2485
any_address = "0.0.0.0" # INADDR_ANY
1915
any_address = socket.INADDR_ANY
2486
1916
self.server_address = (any_address,
2487
1917
self.server_address[1])
2488
1918
elif not self.server_address[1]:
2489
self.server_address = (self.server_address[0], 0)
1919
self.server_address = (self.server_address[0],
2490
1921
# if self.interface:
2491
1922
# self.server_address = (self.server_address[0],
2614
def rfc3339_duration_to_delta(duration):
2615
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2617
>>> rfc3339_duration_to_delta("P7D")
2618
datetime.timedelta(7)
2619
>>> rfc3339_duration_to_delta("PT60S")
2620
datetime.timedelta(0, 60)
2621
>>> rfc3339_duration_to_delta("PT60M")
2622
datetime.timedelta(0, 3600)
2623
>>> rfc3339_duration_to_delta("PT24H")
2624
datetime.timedelta(1)
2625
>>> rfc3339_duration_to_delta("P1W")
2626
datetime.timedelta(7)
2627
>>> rfc3339_duration_to_delta("PT5M30S")
2628
datetime.timedelta(0, 330)
2629
>>> rfc3339_duration_to_delta("P1DT3M20S")
2630
datetime.timedelta(1, 200)
2633
# Parsing an RFC 3339 duration with regular expressions is not
2634
# possible - there would have to be multiple places for the same
2635
# values, like seconds. The current code, while more esoteric, is
2636
# cleaner without depending on a parsing library. If Python had a
2637
# built-in library for parsing we would use it, but we'd like to
2638
# avoid excessive use of external libraries.
2640
# New type for defining tokens, syntax, and semantics all-in-one
2641
Token = collections.namedtuple("Token", (
2642
"regexp", # To match token; if "value" is not None, must have
2643
# a "group" containing digits
2644
"value", # datetime.timedelta or None
2645
"followers")) # Tokens valid after this token
2646
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2647
# the "duration" ABNF definition in RFC 3339, Appendix A.
2648
token_end = Token(re.compile(r"$"), None, frozenset())
2649
token_second = Token(re.compile(r"(\d+)S"),
2650
datetime.timedelta(seconds=1),
2651
frozenset((token_end, )))
2652
token_minute = Token(re.compile(r"(\d+)M"),
2653
datetime.timedelta(minutes=1),
2654
frozenset((token_second, token_end)))
2655
token_hour = Token(re.compile(r"(\d+)H"),
2656
datetime.timedelta(hours=1),
2657
frozenset((token_minute, token_end)))
2658
token_time = Token(re.compile(r"T"),
2660
frozenset((token_hour, token_minute,
2662
token_day = Token(re.compile(r"(\d+)D"),
2663
datetime.timedelta(days=1),
2664
frozenset((token_time, token_end)))
2665
token_month = Token(re.compile(r"(\d+)M"),
2666
datetime.timedelta(weeks=4),
2667
frozenset((token_day, token_end)))
2668
token_year = Token(re.compile(r"(\d+)Y"),
2669
datetime.timedelta(weeks=52),
2670
frozenset((token_month, token_end)))
2671
token_week = Token(re.compile(r"(\d+)W"),
2672
datetime.timedelta(weeks=1),
2673
frozenset((token_end, )))
2674
token_duration = Token(re.compile(r"P"), None,
2675
frozenset((token_year, token_month,
2676
token_day, token_time,
2678
# Define starting values
2679
value = datetime.timedelta() # Value so far
2681
followers = frozenset((token_duration, )) # Following valid tokens
2682
s = duration # String left to parse
2683
# Loop until end token is found
2684
while found_token is not token_end:
2685
# Search for any currently valid tokens
2686
for token in followers:
2687
match = token.regexp.match(s)
2688
if match is not None:
2690
if token.value is not None:
2691
# Value found, parse digits
2692
factor = int(match.group(1), 10)
2693
# Add to value so far
2694
value += factor * token.value
2695
# Strip token from string
2696
s = token.regexp.sub("", s, 1)
2699
# Set valid next tokens
2700
followers = found_token.followers
2703
# No currently valid tokens were found
2704
raise ValueError("Invalid RFC 3339 duration: {!r}"
2710
2050
def string_to_delta(interval):
2711
2051
"""Parse a string and return a datetime.timedelta
2841
2167
"debug": "False",
2843
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2844
":+SIGN-DSA-SHA256",
2169
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2845
2170
"servicename": "Mandos",
2846
2171
"use_dbus": "True",
2847
2172
"use_ipv6": "True",
2848
2173
"debuglevel": "",
2849
2174
"restore": "True",
2851
"statedir": "/var/lib/mandos",
2852
"foreground": "False",
2175
"statedir": "/var/lib/mandos"
2856
2178
# Parse config file for server-global settings
2857
2179
server_config = configparser.SafeConfigParser(server_defaults)
2858
2180
del server_defaults
2859
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2181
server_config.read(os.path.join(options.configdir,
2860
2183
# Convert the SafeConfigParser object to a dict
2861
2184
server_settings = server_config.defaults()
2862
2185
# Use the appropriate methods on the non-string config options
2863
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2186
for option in ("debug", "use_dbus", "use_ipv6"):
2864
2187
server_settings[option] = server_config.getboolean("DEFAULT",
2866
2189
if server_settings["port"]:
2867
2190
server_settings["port"] = server_config.getint("DEFAULT",
2869
if server_settings["socket"]:
2870
server_settings["socket"] = server_config.getint("DEFAULT",
2872
# Later, stdin will, and stdout and stderr might, be dup'ed
2873
# over with an opened os.devnull. But we don't want this to
2874
# happen with a supplied network socket.
2875
if 0 <= server_settings["socket"] <= 2:
2876
server_settings["socket"] = os.dup(server_settings
2878
2192
del server_config
2880
2194
# Override the settings from the config file with command line
2881
2195
# options, if set.
2882
2196
for option in ("interface", "address", "port", "debug",
2883
"priority", "servicename", "configdir", "use_dbus",
2884
"use_ipv6", "debuglevel", "restore", "statedir",
2885
"socket", "foreground", "zeroconf"):
2197
"priority", "servicename", "configdir",
2198
"use_dbus", "use_ipv6", "debuglevel", "restore",
2886
2200
value = getattr(options, option)
2887
2201
if value is not None:
2888
2202
server_settings[option] = value
2890
2204
# Force all strings to be unicode
2891
2205
for option in server_settings.keys():
2892
if isinstance(server_settings[option], bytes):
2893
server_settings[option] = (server_settings[option]
2895
# Force all boolean options to be boolean
2896
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2897
"foreground", "zeroconf"):
2898
server_settings[option] = bool(server_settings[option])
2899
# Debug implies foreground
2900
if server_settings["debug"]:
2901
server_settings["foreground"] = True
2206
if type(server_settings[option]) is str:
2207
server_settings[option] = unicode(server_settings[option])
2902
2208
# Now we have our good server settings in "server_settings"
2904
2210
##################################################################
2906
if (not server_settings["zeroconf"]
2907
and not (server_settings["port"]
2908
or server_settings["socket"] != "")):
2909
parser.error("Needs port or socket to work without Zeroconf")
2911
2212
# For convenience
2912
2213
debug = server_settings["debug"]
2913
2214
debuglevel = server_settings["debuglevel"]
3010
2298
# Need to fork before connecting to D-Bus
3012
2300
# Close all input and output, do double fork, etc.
3015
# multiprocessing will use threads, so before we use GLib we need
3016
# to inform GLib that threads will be used.
2303
gobject.threads_init()
3019
2305
global main_loop
3020
2306
# From the Avahi example code
3021
2307
DBusGMainLoop(set_as_default=True)
3022
main_loop = GLib.MainLoop()
2308
main_loop = gobject.MainLoop()
3023
2309
bus = dbus.SystemBus()
3024
2310
# End of Avahi example code
3027
2313
bus_name = dbus.service.BusName("se.recompile.Mandos",
3030
old_bus_name = dbus.service.BusName(
3031
"se.bsnet.fukt.Mandos", bus,
3033
except dbus.exceptions.DBusException as e:
3034
logger.error("Disabling D-Bus:", exc_info=e)
2314
bus, do_not_queue=True)
2315
old_bus_name = (dbus.service.BusName
2316
("se.bsnet.fukt.Mandos", bus,
2318
except dbus.exceptions.NameExistsException as e:
2319
logger.error(unicode(e) + ", disabling D-Bus")
3035
2320
use_dbus = False
3036
2321
server_settings["use_dbus"] = False
3037
2322
tcp_server.use_dbus = False
3039
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3040
service = AvahiServiceToSyslog(
3041
name = server_settings["servicename"],
3042
servicetype = "_mandos._tcp",
3043
protocol = protocol,
3045
if server_settings["interface"]:
3046
service.interface = if_nametoindex(
3047
server_settings["interface"].encode("utf-8"))
2323
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2324
service = AvahiServiceToSyslog(name =
2325
server_settings["servicename"],
2326
servicetype = "_mandos._tcp",
2327
protocol = protocol, bus = bus)
2328
if server_settings["interface"]:
2329
service.interface = (if_nametoindex
2330
(str(server_settings["interface"])))
3049
2332
global multiprocessing_manager
3050
2333
multiprocessing_manager = multiprocessing.Manager()
3052
2335
client_class = Client
3054
client_class = functools.partial(ClientDBus, bus = bus)
2337
client_class = functools.partial(ClientDBusTransitional,
3056
2340
client_settings = Client.config_parser(client_config)
3057
2341
old_client_settings = {}
3058
2342
clients_data = {}
3060
# This is used to redirect stdout and stderr for checker processes
3062
wnull = open(os.devnull, "w") # A writable /dev/null
3063
# Only used if server is running in foreground but not in debug
3065
if debug or not foreground:
3068
2344
# Get client data and settings from last running state.
3069
2345
if server_settings["restore"]:
3071
2347
with open(stored_state_path, "rb") as stored_state:
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"]
2348
clients_data, old_client_settings = (pickle.load
3117
2350
os.remove(stored_state_path)
3118
2351
except IOError as e:
3119
if e.errno == errno.ENOENT:
3120
logger.warning("Could not load persistent state:"
3121
" {}".format(os.strerror(e.errno)))
3123
logger.critical("Could not load persistent state:",
2352
logger.warning("Could not load persistent state: {0}"
2354
if e.errno != errno.ENOENT:
3126
2356
except EOFError as e:
3127
2357
logger.warning("Could not load persistent state: "
2358
"EOFError: {0}".format(e))
3131
2360
with PGPEngine() as pgp:
3132
for client_name, client in clients_data.items():
3133
# Skip removed clients
3134
if client_name not in client_settings:
2361
for client_name, client in clients_data.iteritems():
3137
2362
# Decide which value to use after restoring saved state.
3138
2363
# We have three different values: Old config file,
3139
2364
# new config file, and saved state.
3197
2423
for client_name in (set(client_settings)
3198
2424
- set(old_client_settings)):
3199
2425
clients_data[client_name] = client_settings[client_name]
3201
2427
# Create all client objects
3202
for client_name, client in clients_data.items():
2428
for client_name, client in clients_data.iteritems():
3203
2429
tcp_server.clients[client_name] = client_class(
3206
server_settings = server_settings)
2430
name = client_name, settings = client)
3208
2432
if not tcp_server.clients:
3209
2433
logger.warning("No clients defined")
3212
if pidfile is not None:
3216
print(pid, file=pidfile)
3218
logger.error("Could not write to file %r with PID %d",
2439
pidfile.write(str(pid) + "\n".encode("utf-8"))
2442
logger.error("Could not write to file %r with PID %d",
2445
# "pidfile" was never created
3221
2447
del pidfilename
2448
signal.signal(signal.SIGINT, signal.SIG_IGN)
3223
for termsig in (signal.SIGHUP, signal.SIGTERM):
3224
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3225
lambda: main_loop.quit() and False)
2450
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2451
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3229
@alternate_dbus_interfaces(
3230
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3231
class MandosDBusService(DBusObjectWithObjectManager):
2454
class MandosDBusService(DBusObjectWithProperties):
3232
2455
"""A D-Bus proxy object"""
3234
2456
def __init__(self):
3235
2457
dbus.service.Object.__init__(self, bus, "/")
3237
2458
_interface = "se.recompile.Mandos"
2460
@dbus_interface_annotations(_interface)
2462
return { "org.freedesktop.DBus.Property"
2463
".EmitsChangedSignal":
3239
2466
@dbus.service.signal(_interface, signature="o")
3240
2467
def ClientAdded(self, objpath):
3249
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3251
2476
@dbus.service.signal(_interface, signature="os")
3252
2477
def ClientRemoved(self, objpath, name):
3256
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3258
2481
@dbus.service.method(_interface, out_signature="ao")
3259
2482
def GetAllClients(self):
3261
return dbus.Array(c.dbus_object_path for c in
3262
tcp_server.clients.values())
2484
return dbus.Array(c.dbus_object_path
2486
tcp_server.clients.itervalues())
3264
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3266
2488
@dbus.service.method(_interface,
3267
2489
out_signature="a{oa{sv}}")
3268
2490
def GetAllClientsWithProperties(self):
3270
2492
return dbus.Dictionary(
3271
{ c.dbus_object_path: c.GetAll(
3272
"se.recompile.Mandos.Client")
3273
for c in tcp_server.clients.values() },
2493
((c.dbus_object_path, c.GetAll(""))
2494
for c in tcp_server.clients.itervalues()),
3274
2495
signature="oa{sv}")
3276
2497
@dbus.service.method(_interface, in_signature="o")
3277
2498
def RemoveClient(self, object_path):
3279
for c in tcp_server.clients.values():
2500
for c in tcp_server.clients.itervalues():
3280
2501
if c.dbus_object_path == object_path:
3281
2502
del tcp_server.clients[c.name]
3282
2503
c.remove_from_connection()
3283
# Don't signal the disabling
2504
# Don't signal anything except ClientRemoved
3284
2505
c.disable(quiet=True)
3285
# Emit D-Bus signal for removal
3286
self.client_removed_signal(c)
2507
self.ClientRemoved(object_path, c.name)
3288
2509
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,
3328
mandos_dbus_service = MandosDBusService()
2513
class MandosDBusServiceTransitional(MandosDBusService):
2514
__metaclass__ = AlternateDBusNamesMetaclass
2515
mandos_dbus_service = MandosDBusServiceTransitional()
3330
# Save modules to variables to exempt the modules from being
3331
# unloaded before the function registered with atexit() is run.
3332
mp = multiprocessing
3335
2518
"Cleanup function; run on exit"
3339
mp.active_children()
2521
multiprocessing.active_children()
3341
2522
if not (tcp_server.clients or client_settings):
3370
2551
del client_settings[client.name]["secret"]
3373
with tempfile.NamedTemporaryFile(
3377
dir=os.path.dirname(stored_state_path),
3378
delete=False) as stored_state:
3379
pickle.dump((clients, client_settings), stored_state,
3381
tempname = stored_state.name
2554
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2557
(stored_state_path))
2558
with os.fdopen(tempfd, "wb") as stored_state:
2559
pickle.dump((clients, client_settings), stored_state)
3382
2560
os.rename(tempname, stored_state_path)
3383
2561
except (IOError, OSError) as e:
2562
logger.warning("Could not save persistent state: {0}"
3386
2566
os.remove(tempname)
3387
2567
except NameError:
3389
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3390
logger.warning("Could not save persistent state: {}"
3391
.format(os.strerror(e.errno)))
3393
logger.warning("Could not save persistent state:",
2569
if e.errno not in set((errno.ENOENT, errno.EACCES,
3397
2573
# Delete all clients, and settings from config
3398
2574
while tcp_server.clients:
3399
2575
name, client = tcp_server.clients.popitem()
3401
2577
client.remove_from_connection()
3402
# Don't signal the disabling
2578
# Don't signal anything except ClientRemoved
3403
2579
client.disable(quiet=True)
3404
# Emit D-Bus signal for removal
3406
mandos_dbus_service.client_removed_signal(client)
2582
mandos_dbus_service.ClientRemoved(client
3407
2585
client_settings.clear()
3409
2587
atexit.register(cleanup)
3411
for client in tcp_server.clients.values():
2589
for client in tcp_server.clients.itervalues():
3413
# Emit D-Bus signal for adding
3414
mandos_dbus_service.client_added_signal(client)
2592
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3415
2593
# Need to initiate checking of clients
3416
2594
if client.enabled:
3417
2595
client.init_checker()