69
import cPickle as pickle
65
import cPickle as pickle
72
66
import multiprocessing
81
73
import dbus.service
82
from gi.repository import GLib
83
76
from dbus.mainloop.glib import DBusGMainLoop
86
79
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
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
85
except AttributeError:
96
# This is where SO_BINDTODEVICE was up to and including Python
98
87
from IN import SO_BINDTODEVICE
99
88
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:
89
SO_BINDTODEVICE = None
118
92
stored_state_file = "clients.pickle"
120
94
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
126
103
except (OSError, AttributeError):
128
104
def if_nametoindex(interface):
129
105
"Get an interface index the hard way, i.e. using fcntl()"
130
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
107
with contextlib.closing(socket.socket()) as s:
132
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
135
113
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
116
def initlogger(debug, level=logging.WARNING):
155
117
"""init logger and add loglevel"""
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
119
syslogger.setFormatter(logging.Formatter
162
120
('Mandos [%(process)d]: %(levelname)s:'
164
122
logger.addHandler(syslogger)
167
125
console = logging.StreamHandler()
168
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
225
171
os.rmdir(self.tempdir)
226
172
self.tempdir = None
228
174
def password_encode(self, password):
229
175
# Passphrase can not be empty and can not contain newlines or
230
176
# 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"))
177
return b"mandos" + binascii.hexlify(password)
239
179
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:
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
193
self.gnupg.passphrase = None
255
194
return ciphertext
257
196
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:
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
210
self.gnupg.passphrase = None
273
211
return decrypted_plaintext
276
# Pretend that we have an Avahi module
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
303
214
class AvahiError(Exception):
304
215
def __init__(self, value, *args, **kwargs):
305
216
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
310
221
class AvahiServiceError(AvahiError):
314
224
class AvahiGroupError(AvahiError):
318
228
class AvahiService(object):
319
229
"""An Avahi (Zeroconf) service.
322
232
interface: integer; avahi.IF_UNSPEC or an interface index.
323
233
Used to optionally bind to the specified interface.
324
234
name: string; Example: 'Mandos'
325
235
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
236
See <http://www.dns-sd.org/ServiceTypes.html>
327
237
port: integer; what port to announce
328
238
TXT: list of strings; TXT record for the service
329
239
domain: string; Domain to publish on, default to .local if empty.
488
376
follow_name_owner_changes=True),
489
377
avahi.DBUS_INTERFACE_SERVER)
490
378
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
379
self.server_state_changed)
492
380
self.server_state_changed(self.server.GetState())
495
383
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
385
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
510
library = ctypes.util.find_library("gnutls")
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
515
_need_version = b"3.3.0"
518
# Need to use "self" here, since this method is called before
519
# the assignment to the "gnutls" global variable happens.
520
if self.check_version(self._need_version) is None:
521
raise self.Error("Needs GnuTLS {} or later"
522
.format(self._need_version))
524
# Unless otherwise indicated, the constants and types below are
525
# all from the gnutls/gnutls.h C header file.
535
E_NO_CERTIFICATE_FOUND = -49
536
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
539
class session_int(ctypes.Structure):
541
session_t = ctypes.POINTER(session_int)
543
class certificate_credentials_st(ctypes.Structure):
545
certificate_credentials_t = ctypes.POINTER(
546
certificate_credentials_st)
547
certificate_type_t = ctypes.c_int
549
class datum_t(ctypes.Structure):
550
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
('size', ctypes.c_uint)]
553
class openpgp_crt_int(ctypes.Structure):
555
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
557
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
credentials_type_t = ctypes.c_int
559
transport_ptr_t = ctypes.c_void_p
560
close_request_t = ctypes.c_int
563
class Error(Exception):
564
# We need to use the class name "GnuTLS" here, since this
565
# exception might be raised from within GnuTLS.__init__,
566
# which is called before the assignment to the "gnutls"
567
# global variable has happened.
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
573
if message is None and code is not None:
574
message = GnuTLS.strerror(code)
575
return super(GnuTLS.Error, self).__init__(
578
class CertificateSecurityError(Error):
582
class Credentials(object):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
590
gnutls.certificate_free_credentials(self._c_object)
592
class ClientSession(object):
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
gnutls.set_default_priority(self._c_object)
597
gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
gnutls.handshake_set_private_extensions(self._c_object,
601
if credentials is None:
602
credentials = gnutls.Credentials()
603
gnutls.credentials_set(self._c_object, credentials.type,
604
ctypes.cast(credentials._c_object,
606
self.credentials = credentials
609
gnutls.deinit(self._c_object)
612
return gnutls.handshake(self._c_object)
614
def send(self, data):
618
data_len -= gnutls.record_send(self._c_object,
623
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
# Error handling functions
626
def _error_code(result):
627
"""A function to raise exceptions on errors, suitable
628
for the 'restype' attribute on ctypes functions"""
631
if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
raise gnutls.CertificateSecurityError(code=result)
633
raise gnutls.Error(code=result)
635
def _retry_on_error(result, func, arguments):
636
"""A function to retry on some errors, suitable
637
for the 'errcheck' attribute on ctypes functions"""
639
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
return _error_code(result)
641
result = func(*arguments)
644
# Unless otherwise indicated, the function declarations below are
645
# all from the gnutls/gnutls.h C header file.
648
priority_set_direct = _library.gnutls_priority_set_direct
649
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
ctypes.POINTER(ctypes.c_char_p)]
651
priority_set_direct.restype = _error_code
653
init = _library.gnutls_init
654
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
init.restype = _error_code
657
set_default_priority = _library.gnutls_set_default_priority
658
set_default_priority.argtypes = [session_t]
659
set_default_priority.restype = _error_code
661
record_send = _library.gnutls_record_send
662
record_send.argtypes = [session_t, ctypes.c_void_p,
664
record_send.restype = ctypes.c_ssize_t
665
record_send.errcheck = _retry_on_error
667
certificate_allocate_credentials = (
668
_library.gnutls_certificate_allocate_credentials)
669
certificate_allocate_credentials.argtypes = [
670
ctypes.POINTER(certificate_credentials_t)]
671
certificate_allocate_credentials.restype = _error_code
673
certificate_free_credentials = (
674
_library.gnutls_certificate_free_credentials)
675
certificate_free_credentials.argtypes = [
676
certificate_credentials_t]
677
certificate_free_credentials.restype = None
679
handshake_set_private_extensions = (
680
_library.gnutls_handshake_set_private_extensions)
681
handshake_set_private_extensions.argtypes = [session_t,
683
handshake_set_private_extensions.restype = None
685
credentials_set = _library.gnutls_credentials_set
686
credentials_set.argtypes = [session_t, credentials_type_t,
688
credentials_set.restype = _error_code
690
strerror = _library.gnutls_strerror
691
strerror.argtypes = [ctypes.c_int]
692
strerror.restype = ctypes.c_char_p
694
certificate_type_get = _library.gnutls_certificate_type_get
695
certificate_type_get.argtypes = [session_t]
696
certificate_type_get.restype = _error_code
698
certificate_get_peers = _library.gnutls_certificate_get_peers
699
certificate_get_peers.argtypes = [session_t,
700
ctypes.POINTER(ctypes.c_uint)]
701
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
global_set_log_level = _library.gnutls_global_set_log_level
704
global_set_log_level.argtypes = [ctypes.c_int]
705
global_set_log_level.restype = None
707
global_set_log_function = _library.gnutls_global_set_log_function
708
global_set_log_function.argtypes = [log_func]
709
global_set_log_function.restype = None
711
deinit = _library.gnutls_deinit
712
deinit.argtypes = [session_t]
713
deinit.restype = None
715
handshake = _library.gnutls_handshake
716
handshake.argtypes = [session_t]
717
handshake.restype = _error_code
718
handshake.errcheck = _retry_on_error
720
transport_set_ptr = _library.gnutls_transport_set_ptr
721
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
transport_set_ptr.restype = None
724
bye = _library.gnutls_bye
725
bye.argtypes = [session_t, close_request_t]
726
bye.restype = _error_code
727
bye.errcheck = _retry_on_error
729
check_version = _library.gnutls_check_version
730
check_version.argtypes = [ctypes.c_char_p]
731
check_version.restype = ctypes.c_char_p
733
# All the function declarations below are from gnutls/openpgp.h
735
openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
openpgp_crt_init.restype = _error_code
739
openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
openpgp_crt_import.argtypes = [openpgp_crt_t,
741
ctypes.POINTER(datum_t),
743
openpgp_crt_import.restype = _error_code
745
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
ctypes.POINTER(ctypes.c_uint)]
748
openpgp_crt_verify_self.restype = _error_code
750
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
openpgp_crt_deinit.restype = None
754
openpgp_crt_get_fingerprint = (
755
_library.gnutls_openpgp_crt_get_fingerprint)
756
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
760
openpgp_crt_get_fingerprint.restype = _error_code
762
# Remove non-public functions
763
del _error_code, _retry_on_error
764
# Create the global "gnutls" object, simulating a module
768
def call_pipe(connection, # : multiprocessing.Connection
769
func, *args, **kwargs):
770
"""This function is meant to be called by multiprocessing.Process
772
This function runs func(*args, **kwargs), and writes the resulting
773
return value on the provided multiprocessing.Connection.
775
connection.send(func(*args, **kwargs))
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
779
401
class Client(object):
780
402
"""A representation of a client host served by this server.
783
405
approved: bool(); 'None' if not yet approved/disapproved
784
406
approval_delay: datetime.timedelta(); Time to wait for approval
819
439
runtime_expansions: Allowed attributes for runtime expansion.
820
440
expires: datetime.datetime(); time (UTC) when a client will be
821
441
disabled, or None
822
server_settings: The server_settings dict from main()
825
444
runtime_expansions = ("approval_delay", "approval_duration",
826
445
"created", "enabled", "expires",
827
446
"fingerprint", "host", "interval",
828
447
"last_approval_request", "last_checked_ok",
829
448
"last_enabled", "name", "timeout")
832
"extended_timeout": "PT15M",
834
"checker": "fping -q -- %%(host)s",
836
"approval_delay": "PT0S",
837
"approval_duration": "PT1S",
838
"approved_by_default": "True",
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
452
"checker": "fping -q -- %%(host)s",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
460
def timeout_milliseconds(self):
461
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
468
def interval_milliseconds(self):
469
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
472
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
843
476
def config_parser(config):
844
477
"""Construct a new dict of client settings of this form:
959
590
logger.info("Disabling client %s", self.name)
960
591
if getattr(self, "disable_initiator_tag", None) is not None:
961
GLib.source_remove(self.disable_initiator_tag)
592
gobject.source_remove(self.disable_initiator_tag)
962
593
self.disable_initiator_tag = None
963
594
self.expires = None
964
595
if getattr(self, "checker_initiator_tag", None) is not None:
965
GLib.source_remove(self.checker_initiator_tag)
596
gobject.source_remove(self.checker_initiator_tag)
966
597
self.checker_initiator_tag = None
967
598
self.stop_checker()
968
599
self.enabled = False
970
601
self.send_changedstate()
971
# Do not run this again if called by a GLib.timeout_add
602
# Do not run this again if called by a gobject.timeout_add
974
605
def __del__(self):
977
608
def init_checker(self):
978
609
# Schedule a new checker to be started an 'interval' from now,
979
610
# and every interval from then on.
980
611
if self.checker_initiator_tag is not None:
981
GLib.source_remove(self.checker_initiator_tag)
982
self.checker_initiator_tag = GLib.timeout_add(
983
int(self.interval.total_seconds() * 1000),
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
985
616
# Schedule a disable() when 'timeout' has passed
986
617
if self.disable_initiator_tag is not None:
987
GLib.source_remove(self.disable_initiator_tag)
988
self.disable_initiator_tag = GLib.timeout_add(
989
int(self.timeout.total_seconds() * 1000), self.disable)
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
990
622
# Also start a new checker *right now*.
991
623
self.start_checker()
993
def checker_callback(self, source, condition, connection,
625
def checker_callback(self, pid, condition, command):
995
626
"""The checker has completed, so take appropriate actions."""
996
627
self.checker_callback_tag = None
997
628
self.checker = None
998
# Read return code from connection (see call_pipe)
999
returncode = connection.recv()
1003
self.last_checker_status = returncode
1004
self.last_checker_signal = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1005
631
if self.last_checker_status == 0:
1006
632
logger.info("Checker for %(name)s succeeded",
1008
634
self.checked_ok()
1010
logger.info("Checker for %(name)s failed", vars(self))
636
logger.info("Checker for %(name)s failed",
1012
639
self.last_checker_status = -1
1013
self.last_checker_signal = -returncode
1014
640
logger.warning("Checker for %(name)s crashed?",
1018
643
def checked_ok(self):
1019
644
"""Assert that the client has been seen, alive and well."""
1020
645
self.last_checked_ok = datetime.datetime.utcnow()
1021
646
self.last_checker_status = 0
1022
self.last_checker_signal = None
1023
647
self.bump_timeout()
1025
649
def bump_timeout(self, timeout=None):
1026
650
"""Bump up the timeout for this client."""
1027
651
if timeout is None:
1028
652
timeout = self.timeout
1029
653
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
654
gobject.source_remove(self.disable_initiator_tag)
1031
655
self.disable_initiator_tag = None
1032
656
if getattr(self, "enabled", False):
1033
self.disable_initiator_tag = GLib.timeout_add(
1034
int(timeout.total_seconds() * 1000), self.disable)
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1035
660
self.expires = datetime.datetime.utcnow() + timeout
1037
662
def need_approval(self):
1038
663
self.last_approval_request = datetime.datetime.utcnow()
1040
665
def start_checker(self):
1041
666
"""Start a new checker subprocess if one is not running.
1043
668
If a checker already exists, leave it running and do
1045
670
# The reason for not killing a running checker is that if we
1050
675
# checkers alone, the checker would have to take more time
1051
676
# than 'timeout' for the client to be disabled, which is as it
1054
if self.checker is not None and not self.checker.is_alive():
1055
logger.warning("Checker was not alive; joining")
679
# If a checker exists, make sure it is not a zombie
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
1058
692
# Start a new checker if needed
1059
693
if self.checker is None:
1060
694
# Escape attributes for the shell
1062
attr: re.escape(str(getattr(self, attr)))
1063
for attr in self.runtime_expansions}
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
1065
700
command = self.checker_command % escaped_attrs
1066
701
except TypeError as error:
1067
702
logger.error('Could not format string "%s"',
1068
self.checker_command,
703
self.checker_command, exc_info=error)
704
return True # Try again later
705
self.current_checker_command = command
707
logger.info("Starting checker %r for %s",
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
716
except OSError as error:
717
logger.error("Failed to start subprocess",
1070
return True # Try again later
1071
self.current_checker_command = command
1072
logger.info("Starting checker %r for %s", command,
1074
# We don't need to redirect stdout and stderr, since
1075
# in normal mode, that is already done by daemon(),
1076
# and in debug mode we don't want to. (Stdin is
1077
# always replaced by /dev/null.)
1078
# The exception is when not debugging but nevertheless
1079
# running in the foreground; use the previously
1081
popen_args = {"close_fds": True,
1084
if (not self.server_settings["debug"]
1085
and self.server_settings["foreground"]):
1086
popen_args.update({"stdout": wnull,
1088
pipe = multiprocessing.Pipe(duplex=False)
1089
self.checker = multiprocessing.Process(
1091
args=(pipe[1], subprocess.call, command),
1093
self.checker.start()
1094
self.checker_callback_tag = GLib.io_add_watch(
1095
pipe[0].fileno(), GLib.IO_IN,
1096
self.checker_callback, pipe[0], command)
1097
# Re-run this periodically if run by GLib.timeout_add
719
self.checker_callback_tag = (gobject.child_watch_add
721
self.checker_callback,
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
1100
732
def stop_checker(self):
1101
733
"""Force the checker process, if any, to stop."""
1102
734
if self.checker_callback_tag:
1103
GLib.source_remove(self.checker_callback_tag)
735
gobject.source_remove(self.checker_callback_tag)
1104
736
self.checker_callback_tag = None
1105
737
if getattr(self, "checker", None) is None:
1107
739
logger.debug("Stopping checker for %(name)s", vars(self))
1108
self.checker.terminate()
741
self.checker.terminate()
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
1109
748
self.checker = None
1112
def dbus_service_property(dbus_interface,
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1116
753
"""Decorators for marking methods of a DBusObjectWithProperties to
1117
754
become properties on the D-Bus.
1119
756
The decorated method will be called with no arguments by "Get"
1120
757
and with one argument by "Set".
1122
759
The parameters, where they are supported, are the same as
1123
760
dbus.service.method, except there is only "signature", since the
1124
761
type from Get() and the type sent to Set() is the same.
1207
class DBusObjectWithAnnotations(dbus.service.Object):
1208
"""A D-Bus object with annotations.
1210
Classes inheriting from this can use the dbus_annotations
1211
decorator to add annotations to methods or signals.
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
1215
846
def _is_dbus_thing(thing):
1216
847
"""Returns a function testing if an attribute is a D-Bus thing
1218
849
If called like _is_dbus_thing("method") it returns a function
1219
850
suitable for use as predicate to inspect.getmembers().
1221
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1224
855
def _get_all_dbus_things(self, thing):
1225
856
"""Returns a generator of (name, attribute) pairs
1227
return ((getattr(athing.__get__(self), "_dbus_name", name),
858
return ((getattr(athing.__get__(self), "_dbus_name",
1228
860
athing.__get__(self))
1229
861
for cls in self.__class__.__mro__
1230
862
for name, athing in
1231
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
path_keyword='object_path',
1236
connection_keyword='connection')
1237
def Introspect(self, object_path, connection):
1238
"""Overloading of standard D-Bus method.
1240
Inserts annotation tags on methods and signals.
1242
xmlstring = dbus.service.Object.Introspect(self, object_path,
1245
document = xml.dom.minidom.parseString(xmlstring)
1247
for if_tag in document.getElementsByTagName("interface"):
1248
# Add annotation tags
1249
for typ in ("method", "signal"):
1250
for tag in if_tag.getElementsByTagName(typ):
1252
for name, prop in (self.
1253
_get_all_dbus_things(typ)):
1254
if (name == tag.getAttribute("name")
1255
and prop._dbus_interface
1256
== if_tag.getAttribute("name")):
1257
annots.update(getattr(
1258
prop, "_dbus_annotations", {}))
1259
for name, value in annots.items():
1260
ann_tag = document.createElement(
1262
ann_tag.setAttribute("name", name)
1263
ann_tag.setAttribute("value", value)
1264
tag.appendChild(ann_tag)
1265
# Add interface annotation tags
1266
for annotation, value in dict(
1267
itertools.chain.from_iterable(
1268
annotations().items()
1269
for name, annotations
1270
in self._get_all_dbus_things("interface")
1271
if name == if_tag.getAttribute("name")
1273
ann_tag = document.createElement("annotation")
1274
ann_tag.setAttribute("name", annotation)
1275
ann_tag.setAttribute("value", value)
1276
if_tag.appendChild(ann_tag)
1277
# Fix argument name for the Introspect method itself
1278
if (if_tag.getAttribute("name")
1279
== dbus.INTROSPECTABLE_IFACE):
1280
for cn in if_tag.getElementsByTagName("method"):
1281
if cn.getAttribute("name") == "Introspect":
1282
for arg in cn.getElementsByTagName("arg"):
1283
if (arg.getAttribute("direction")
1285
arg.setAttribute("name",
1287
xmlstring = document.toxml("utf-8")
1289
except (AttributeError, xml.dom.DOMException,
1290
xml.parsers.expat.ExpatError) as error:
1291
logger.error("Failed to override Introspection method",
1296
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1297
"""A D-Bus object with properties.
1299
Classes inheriting from this can use the dbus_service_property
1300
decorator to expose methods as D-Bus properties. It exposes the
1301
standard Get(), Set(), and GetAll() methods on the D-Bus.
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
1304
866
def _get_dbus_property(self, interface_name, property_name):
1305
867
"""Returns a bound method if one exists which is a D-Bus
1306
868
property with the specified name and interface.
1308
for cls in self.__class__.__mro__:
1309
for name, value in inspect.getmembers(
1310
cls, self._is_dbus_thing("property")):
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
873
self._is_dbus_thing("property"))):
1311
874
if (value._dbus_name == property_name
1312
875
and value._dbus_interface == interface_name):
1313
876
return value.__get__(self)
1315
878
# No such property
1316
raise DBusPropertyNotFound("{}:{}.{}".format(
1317
self.dbus_object_path, interface_name, property_name))
1320
def _get_all_interface_names(cls):
1321
"""Get a sequence of all interfaces supported by an object"""
1322
return (name for name in set(getattr(getattr(x, attr),
1323
"_dbus_interface", None)
1324
for x in (inspect.getmro(cls))
1326
if name is not None)
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1330
884
out_signature="v")
1331
885
def Get(self, interface_name, property_name):
1332
886
"""Standard D-Bus property Get() method, see D-Bus standard.
1461
1016
return xmlstring
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1478
Note: No signals are sent automatically; they must be sent
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1510
document = xml.dom.minidom.parseString(xmlstring)
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1524
"objpath_interfaces"
1526
xmlstring = document.toxml("utf-8")
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1535
1019
def datetime_to_dbus(dt, variant_level=0):
1536
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1538
return dbus.String("", variant_level=variant_level)
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1542
1027
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1573
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
1574
1058
# with the wrong interface name
1575
1059
if (not hasattr(attribute, "_dbus_interface")
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1579
1063
# Create an alternate D-Bus interface name based on
1580
1064
# the current name
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1583
1068
interface_names.add(alt_interface)
1584
1069
# Is this a D-Bus signal?
1585
1070
if getattr(attribute, "_dbus_is_signal", False):
1586
# Extract the original non-method undecorated
1587
# function by black magic
1588
if sys.version_info.major == 2:
1589
nonmethod_func = (dict(
1071
# Extract the original non-method function by
1073
nonmethod_func = (dict(
1590
1074
zip(attribute.func_code.co_freevars,
1591
attribute.__closure__))
1592
["func"].cell_contents)
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
1075
attribute.__closure__))["func"]
1598
1077
# Create a new, but exactly alike, function
1599
1078
# object, and decorate it to be a new D-Bus signal
1600
1079
# with the alternate D-Bus interface name
1601
new_function = copy_function(nonmethod_func)
1602
new_function = (dbus.service.signal(
1604
attribute._dbus_signature)(new_function))
1080
new_function = (dbus.service.signal
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1605
1089
# Copy annotations, if any
1607
new_function._dbus_annotations = dict(
1608
attribute._dbus_annotations)
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1609
1093
except AttributeError:
1612
1095
# Define a creator of a function to call both the
1613
1096
# original and alternate functions, so both the
1614
1097
# original and alternate signals gets sent when
1697
1187
if interface_names:
1698
1188
# Replace the class with a new subclass of it with
1699
1189
# methods, signals, etc. as created above.
1700
if sys.version_info.major == 2:
1701
cls = type(b"{}Alternate".format(cls.__name__),
1704
cls = type("{}Alternate".format(cls.__name__),
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1711
1196
@alternate_dbus_interfaces({"se.recompile.Mandos":
1712
"se.bsnet.fukt.Mandos"})
1197
"se.bsnet.fukt.Mandos"})
1713
1198
class ClientDBus(Client, DBusObjectWithProperties):
1714
1199
"""A Client class using D-Bus
1717
1202
dbus_object_path: dbus.ObjectPath
1718
1203
bus: dbus.SystemBus()
1721
1206
runtime_expansions = (Client.runtime_expansions
1722
+ ("dbus_object_path", ))
1724
_interface = "se.recompile.Mandos.Client"
1207
+ ("dbus_object_path",))
1726
1209
# dbus.service.Object doesn't use super(), so we can't either.
1728
def __init__(self, bus=None, *args, **kwargs):
1211
def __init__(self, bus = None, *args, **kwargs):
1730
1213
Client.__init__(self, *args, **kwargs)
1731
1214
# Only now, when this client is initialized, can it show up on
1733
client_object_name = str(self.name).translate(
1216
client_object_name = unicode(self.name).translate(
1734
1217
{ord("."): ord("_"),
1735
1218
ord("-"): ord("_")})
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
1219
self.dbus_object_path = (dbus.ObjectPath
1220
("/clients/" + client_object_name))
1738
1221
DBusObjectWithProperties.__init__(self, self.bus,
1739
1222
self.dbus_object_path)
1741
def notifychangeproperty(transform_func, dbus_name,
1742
type_func=lambda x: x,
1744
invalidate_only=False,
1745
_interface=_interface):
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1746
1227
""" Modify a variable so that it's a property which announces
1747
1228
its changes to DBus.
1749
1230
transform_fun: Function that takes a value and a variant_level
1750
1231
and transforms it to a D-Bus type.
1751
1232
dbus_name: D-Bus name of the variable
1827
1297
if hasattr(DBusObjectWithProperties, "__del__"):
1828
1298
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1829
1299
Client.__del__(self, *args, **kwargs)
1831
def checker_callback(self, source, condition,
1832
connection, command, *args, **kwargs):
1833
ret = Client.checker_callback(self, source, condition,
1834
connection, command, *args,
1836
exitstatus = self.last_checker_status
1301
def checker_callback(self, pid, condition, command,
1303
self.checker_callback_tag = None
1305
if os.WIFEXITED(condition):
1306
exitstatus = os.WEXITSTATUS(condition)
1838
1307
# Emit D-Bus signal
1839
1308
self.CheckerCompleted(dbus.Int16(exitstatus),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
1309
dbus.Int64(condition),
1842
1310
dbus.String(command))
1844
1312
# Emit D-Bus signal
1845
1313
self.CheckerCompleted(dbus.Int16(-1),
1847
# This is specific to GNU libC
1849
| self.last_checker_signal),
1314
dbus.Int64(condition),
1850
1315
dbus.String(command))
1317
return Client.checker_callback(self, pid, condition, command,
1853
1320
def start_checker(self, *args, **kwargs):
1854
old_checker_pid = getattr(self.checker, "pid", None)
1321
old_checker = self.checker
1322
if self.checker is not None:
1323
old_checker_pid = self.checker.pid
1325
old_checker_pid = None
1855
1326
r = Client.start_checker(self, *args, **kwargs)
1856
1327
# Only if new checker process was started
1857
1328
if (self.checker is not None
1903
1380
server to mandos-client
1907
1384
# Rejected - signal
1908
1385
@dbus.service.signal(_interface, signature="s")
1909
1386
def Rejected(self, reason):
1913
1390
# NeedApproval - signal
1914
1391
@dbus.service.signal(_interface, signature="tb")
1915
1392
def NeedApproval(self, timeout, default):
1917
1394
return self.need_approval()
1921
1398
# Approve - method
1922
1399
@dbus.service.method(_interface, in_signature="b")
1923
1400
def Approve(self, value):
1924
1401
self.approve(value)
1926
1403
# CheckedOK - method
1927
1404
@dbus.service.method(_interface)
1928
1405
def CheckedOK(self):
1929
1406
self.checked_ok()
1931
1408
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1933
1409
@dbus.service.method(_interface)
1934
1410
def Enable(self):
1938
1414
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1940
1415
@dbus.service.method(_interface)
1941
1416
def StartChecker(self):
1943
1418
self.start_checker()
1945
1420
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
1421
@dbus.service.method(_interface)
1948
1422
def Disable(self):
1952
1426
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1954
1427
@dbus.service.method(_interface)
1955
1428
def StopChecker(self):
1956
1429
self.stop_checker()
1960
1433
# ApprovalPending - property
1961
1434
@dbus_service_property(_interface, signature="b", access="read")
1962
1435
def ApprovalPending_dbus_property(self):
1963
1436
return dbus.Boolean(bool(self.approvals_pending))
1965
1438
# ApprovedByDefault - property
1966
@dbus_service_property(_interface,
1439
@dbus_service_property(_interface, signature="b",
1968
1440
access="readwrite")
1969
1441
def ApprovedByDefault_dbus_property(self, value=None):
1970
1442
if value is None: # get
1971
1443
return dbus.Boolean(self.approved_by_default)
1972
1444
self.approved_by_default = bool(value)
1974
1446
# ApprovalDelay - property
1975
@dbus_service_property(_interface,
1447
@dbus_service_property(_interface, signature="t",
1977
1448
access="readwrite")
1978
1449
def ApprovalDelay_dbus_property(self, value=None):
1979
1450
if value is None: # get
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1451
return dbus.UInt64(self.approval_delay_milliseconds())
1982
1452
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
1454
# ApprovalDuration - property
1985
@dbus_service_property(_interface,
1455
@dbus_service_property(_interface, signature="t",
1987
1456
access="readwrite")
1988
1457
def ApprovalDuration_dbus_property(self, value=None):
1989
1458
if value is None: # get
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
1992
1461
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
1463
# Name - property
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1997
1464
@dbus_service_property(_interface, signature="s", access="read")
1998
1465
def Name_dbus_property(self):
1999
1466
return dbus.String(self.name)
2001
1468
# Fingerprint - property
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2004
1469
@dbus_service_property(_interface, signature="s", access="read")
2005
1470
def Fingerprint_dbus_property(self):
2006
1471
return dbus.String(self.fingerprint)
2008
1473
# Host - property
2009
@dbus_service_property(_interface,
1474
@dbus_service_property(_interface, signature="s",
2011
1475
access="readwrite")
2012
1476
def Host_dbus_property(self, value=None):
2013
1477
if value is None: # get
2014
1478
return dbus.String(self.host)
2015
self.host = str(value)
1479
self.host = unicode(value)
2017
1481
# Created - property
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2020
1482
@dbus_service_property(_interface, signature="s", access="read")
2021
1483
def Created_dbus_property(self):
2022
1484
return datetime_to_dbus(self.created)
2024
1486
# LastEnabled - property
2025
1487
@dbus_service_property(_interface, signature="s", access="read")
2026
1488
def LastEnabled_dbus_property(self):
2027
1489
return datetime_to_dbus(self.last_enabled)
2029
1491
# Enabled - property
2030
@dbus_service_property(_interface,
1492
@dbus_service_property(_interface, signature="b",
2032
1493
access="readwrite")
2033
1494
def Enabled_dbus_property(self, value=None):
2034
1495
if value is None: # get
2083
1543
if (getattr(self, "disable_initiator_tag", None)
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
2088
int((self.expires - now).total_seconds() * 1000),
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
2091
1552
# ExtendedTimeout - property
2092
@dbus_service_property(_interface,
1553
@dbus_service_property(_interface, signature="t",
2094
1554
access="readwrite")
2095
1555
def ExtendedTimeout_dbus_property(self, value=None):
2096
1556
if value is None: # get
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
1558
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
1560
# Interval - property
2102
@dbus_service_property(_interface,
1561
@dbus_service_property(_interface, signature="t",
2104
1562
access="readwrite")
2105
1563
def Interval_dbus_property(self, value=None):
2106
1564
if value is None: # get
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1565
return dbus.UInt64(self.interval_milliseconds())
2108
1566
self.interval = datetime.timedelta(0, 0, 0, value)
2109
1567
if getattr(self, "checker_initiator_tag", None) is None:
2111
1569
if self.enabled:
2112
1570
# Reschedule checker run
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
2115
value, self.start_checker)
2116
self.start_checker() # Start one now, too
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
2118
1576
# Checker - property
2119
@dbus_service_property(_interface,
1577
@dbus_service_property(_interface, signature="s",
2121
1578
access="readwrite")
2122
1579
def Checker_dbus_property(self, value=None):
2123
1580
if value is None: # get
2124
1581
return dbus.String(self.checker_command)
2125
self.checker_command = str(value)
1582
self.checker_command = unicode(value)
2127
1584
# CheckerRunning - property
2128
@dbus_service_property(_interface,
1585
@dbus_service_property(_interface, signature="b",
2130
1586
access="readwrite")
2131
1587
def CheckerRunning_dbus_property(self, value=None):
2132
1588
if value is None: # get
2189
1635
class ClientHandler(socketserver.BaseRequestHandler, object):
2190
1636
"""A class to handle client connections.
2192
1638
Instantiated once for each connection to handle it.
2193
1639
Note: This will run in its own forked process."""
2195
1641
def handle(self):
2196
1642
with contextlib.closing(self.server.child_pipe) as child_pipe:
2197
1643
logger.info("TCP connection from: %s",
2198
str(self.client_address))
1644
unicode(self.client_address))
2199
1645
logger.debug("Pipe FD: %d",
2200
1646
self.server.child_pipe.fileno())
2202
session = gnutls.ClientSession(self.request)
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1651
.X509Credentials()))
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
1662
# Use a fallback default, since this MUST be set.
2209
1663
priority = self.server.gnutls_priority
2210
1664
if priority is None:
2211
1665
priority = "NORMAL"
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
2216
1670
# Start communication using the Mandos protocol
2217
1671
# Get protocol number
2218
1672
line = self.request.makefile().readline()
2219
1673
logger.debug("Protocol version: %r", line)
2221
1675
if int(line.strip().split()[0]) > 1:
2222
raise RuntimeError(line)
2223
1677
except (ValueError, IndexError, RuntimeError) as error:
2224
1678
logger.error("Unknown protocol version: %s", error)
2227
1681
# Start GnuTLS connection
2229
1683
session.handshake()
2230
except gnutls.Error as error:
1684
except gnutls.errors.GNUTLSError as error:
2231
1685
logger.warning("Handshake failed: %s", error)
2232
1686
# Do not run session.bye() here: the session is not
2233
1687
# established. Just abandon the request.
2235
1689
logger.debug("Handshake succeeded")
2237
1691
approval_required = False
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1694
fpr = self.fingerprint(self.peer_certificate
1697
gnutls.errors.GNUTLSError) as error:
2243
1698
logger.warning("Bad certificate: %s", error)
2245
1700
logger.debug("Fingerprint: %s", fpr)
2248
1703
client = ProxyClient(child_pipe, fpr,
2249
1704
self.client_address)
2250
1705
except KeyError:
2253
1708
if client.approval_delay:
2254
1709
delay = client.approval_delay
2255
1710
client.approvals_pending += 1
2256
1711
approval_required = True
2259
1714
if not client.enabled:
2260
1715
logger.info("Client %s is disabled",
2262
1717
if self.server.use_dbus:
2263
1718
# Emit D-Bus signal
2264
1719
client.Rejected("Disabled")
2267
1722
if client.approved or not client.approval_delay:
2268
# We are approved or approval is disabled
1723
#We are approved or approval is disabled
2270
1725
elif client.approved is None:
2271
1726
logger.info("Client %s needs approval",
2304
1761
delay -= time2 - time
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
1764
while sent_size < len(client.secret):
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
2313
1776
logger.info("Sending secret to %s", client.name)
2314
1777
# bump the timeout using extended_timeout
2315
1778
client.bump_timeout(client.extended_timeout)
2316
1779
if self.server.use_dbus:
2317
1780
# Emit D-Bus signal
2318
1781
client.GotSecret()
2321
1784
if approval_required:
2322
1785
client.approvals_pending -= 1
2325
except gnutls.Error as error:
1788
except gnutls.errors.GNUTLSError as error:
2326
1789
logger.warning("GnuTLS bye failed",
2327
1790
exc_info=error)
2330
1793
def peer_certificate(session):
2331
1794
"Return the peer's OpenPGP certificate as a bytestring"
2332
1795
# If not an OpenPGP certificate...
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
return session.peer_certificate
2337
1801
list_size = ctypes.c_uint(1)
2338
cert_list = (gnutls.certificate_get_peers
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2339
1804
(session._c_object, ctypes.byref(list_size)))
2340
1805
if not bool(cert_list) and list_size.value != 0:
2341
raise gnutls.Error("error getting peer certificate")
1806
raise gnutls.errors.GNUTLSError("error getting peer"
2342
1808
if list_size.value == 0:
2344
1810
cert = cert_list[0]
2345
1811
return ctypes.string_at(cert.data, cert.size)
2348
1814
def fingerprint(openpgp):
2349
1815
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2350
1816
# New GnuTLS "datum" with the OpenPGP public key
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1821
ctypes.c_uint(len(openpgp))))
2355
1822
# New empty GnuTLS certificate
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
1826
# Import the OpenPGP public key into the certificate
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2361
1831
# Verify the self signature in the key
2362
1832
crtverify = ctypes.c_uint()
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2365
1836
if crtverify.value != 0:
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
2368
1840
# New buffer for the fingerprint
2369
1841
buf = ctypes.create_string_buffer(20)
2370
1842
buf_len = ctypes.c_size_t()
2371
1843
# Get the fingerprint from the certificate into the buffer
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2374
1847
# Deinit the certificate
2375
gnutls.openpgp_crt_deinit(crt)
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
1849
# Convert the buffer to a Python bytestring
2377
1850
fpr = ctypes.string_at(buf, buf_len.value)
2378
1851
# Convert the bytestring to hexadecimal notation
2383
1856
class MultiprocessingMixIn(object):
2384
1857
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
1858
def sub_process_main(self, request, address):
2388
1860
self.finish_request(request, address)
2389
1861
except Exception:
2390
1862
self.handle_error(request, address)
2391
1863
self.close_request(request)
2393
1865
def process_request(self, request, address):
2394
1866
"""Start a new process to process the request."""
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
2401
1873
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2402
1874
""" adds a pipe to the MixIn """
2404
1875
def process_request(self, request, client_address):
2405
1876
"""Overrides and wraps the original process_request().
2407
1878
This function creates a new pipe in self.pipe
2409
1880
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2411
1882
proc = MultiprocessingMixIn.process_request(self, request,
2412
1883
client_address)
2413
1884
self.child_pipe.close()
2414
1885
self.add_pipe(parent_pipe, proc)
2416
1887
def add_pipe(self, parent_pipe, proc):
2417
1888
"""Dummy function; override as necessary"""
2418
raise NotImplementedError()
1889
raise NotImplementedError
2421
1892
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2422
1893
socketserver.TCPServer, object):
2423
1894
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2426
1897
enabled: Boolean; whether this server is activated yet
2427
1898
interface: None or a network interface name (string)
2428
1899
use_ipv6: Boolean; to use IPv6 or not
2431
1901
def __init__(self, server_address, RequestHandlerClass,
2435
"""If socketfd is set, use that file descriptor instead of
2436
creating a new one with socket.socket().
1902
interface=None, use_ipv6=True):
2438
1903
self.interface = interface
2440
1905
self.address_family = socket.AF_INET6
2441
if socketfd is not None:
2442
# Save the file descriptor
2443
self.socketfd = socketfd
2444
# Save the original socket.socket() function
2445
self.socket_socket = socket.socket
2447
# To implement --socket, we monkey patch socket.socket.
2449
# (When socketserver.TCPServer is a new-style class, we
2450
# could make self.socket into a property instead of monkey
2451
# patching socket.socket.)
2453
# Create a one-time-only replacement for socket.socket()
2454
@functools.wraps(socket.socket)
2455
def socket_wrapper(*args, **kwargs):
2456
# Restore original function so subsequent calls are
2458
socket.socket = self.socket_socket
2459
del self.socket_socket
2460
# This time only, return a new socket object from the
2461
# saved file descriptor.
2462
return socket.fromfd(self.socketfd, *args, **kwargs)
2463
# Replace socket.socket() function with wrapper
2464
socket.socket = socket_wrapper
2465
# The socketserver.TCPServer.__init__ will call
2466
# socket.socket(), which might be our replacement,
2467
# socket_wrapper(), if socketfd was set.
2468
1906
socketserver.TCPServer.__init__(self, server_address,
2469
1907
RequestHandlerClass)
2471
1908
def server_bind(self):
2472
1909
"""This overrides the normal server_bind() function
2473
1910
to bind to an interface if one was specified, and also NOT to
2474
1911
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2476
1912
if self.interface is not None:
2477
1913
if SO_BINDTODEVICE is None:
2478
# Fall back to a hard-coded value which seems to be
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
1914
logger.error("SO_BINDTODEVICE does not exist;"
1915
" cannot bind to interface %s",
1919
self.socket.setsockopt(socket.SOL_SOCKET,
1923
except socket.error as error:
1924
if error.errno == errno.EPERM:
1925
logger.error("No permission to"
1926
" bind to interface %s",
1928
elif error.errno == errno.ENOPROTOOPT:
1929
logger.error("SO_BINDTODEVICE not available;"
1930
" cannot bind to interface %s",
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
2499
1938
# Only bind(2) the socket if we really need to.
2500
1939
if self.server_address[0] or self.server_address[1]:
2501
1940
if not self.server_address[0]:
2502
1941
if self.address_family == socket.AF_INET6:
2503
any_address = "::" # in6addr_any
1942
any_address = "::" # in6addr_any
2505
any_address = "0.0.0.0" # INADDR_ANY
1944
any_address = socket.INADDR_ANY
2506
1945
self.server_address = (any_address,
2507
1946
self.server_address[1])
2508
1947
elif not self.server_address[1]:
2509
self.server_address = (self.server_address[0], 0)
1948
self.server_address = (self.server_address[0],
2510
1950
# if self.interface:
2511
1951
# self.server_address = (self.server_address[0],
2609
2041
funcname = request[1]
2610
2042
args = request[2]
2611
2043
kwargs = request[3]
2613
2045
parent_pipe.send(('data', getattr(client_object,
2614
2046
funcname)(*args,
2617
2049
if command == 'getattr':
2618
2050
attrname = request[1]
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
2051
if callable(client_object.__getattribute__(attrname)):
2052
parent_pipe.send(('function',))
2624
'data', client_object.__getattribute__(attrname)))
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
2626
2057
if command == 'setattr':
2627
2058
attrname = request[1]
2628
2059
value = request[2]
2629
2060
setattr(client_object, attrname, value)
2634
def rfc3339_duration_to_delta(duration):
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
>>> rfc3339_duration_to_delta("P7D")
2638
datetime.timedelta(7)
2639
>>> rfc3339_duration_to_delta("PT60S")
2640
datetime.timedelta(0, 60)
2641
>>> rfc3339_duration_to_delta("PT60M")
2642
datetime.timedelta(0, 3600)
2643
>>> rfc3339_duration_to_delta("PT24H")
2644
datetime.timedelta(1)
2645
>>> rfc3339_duration_to_delta("P1W")
2646
datetime.timedelta(7)
2647
>>> rfc3339_duration_to_delta("PT5M30S")
2648
datetime.timedelta(0, 330)
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
datetime.timedelta(1, 200)
2653
# Parsing an RFC 3339 duration with regular expressions is not
2654
# possible - there would have to be multiple places for the same
2655
# values, like seconds. The current code, while more esoteric, is
2656
# cleaner without depending on a parsing library. If Python had a
2657
# built-in library for parsing we would use it, but we'd like to
2658
# avoid excessive use of external libraries.
2660
# New type for defining tokens, syntax, and semantics all-in-one
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2669
token_second = Token(re.compile(r"(\d+)S"),
2670
datetime.timedelta(seconds=1),
2671
frozenset((token_end, )))
2672
token_minute = Token(re.compile(r"(\d+)M"),
2673
datetime.timedelta(minutes=1),
2674
frozenset((token_second, token_end)))
2675
token_hour = Token(re.compile(r"(\d+)H"),
2676
datetime.timedelta(hours=1),
2677
frozenset((token_minute, token_end)))
2678
token_time = Token(re.compile(r"T"),
2680
frozenset((token_hour, token_minute,
2682
token_day = Token(re.compile(r"(\d+)D"),
2683
datetime.timedelta(days=1),
2684
frozenset((token_time, token_end)))
2685
token_month = Token(re.compile(r"(\d+)M"),
2686
datetime.timedelta(weeks=4),
2687
frozenset((token_day, token_end)))
2688
token_year = Token(re.compile(r"(\d+)Y"),
2689
datetime.timedelta(weeks=52),
2690
frozenset((token_month, token_end)))
2691
token_week = Token(re.compile(r"(\d+)W"),
2692
datetime.timedelta(weeks=1),
2693
frozenset((token_end, )))
2694
token_duration = Token(re.compile(r"P"), None,
2695
frozenset((token_year, token_month,
2696
token_day, token_time,
2698
# Define starting values:
2700
value = datetime.timedelta()
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2706
# Loop until end token is found
2707
while found_token is not token_end:
2708
# Search for any currently valid tokens
2709
for token in followers:
2710
match = token.regexp.match(s)
2711
if match is not None:
2713
if token.value is not None:
2714
# Value found, parse digits
2715
factor = int(match.group(1), 10)
2716
# Add to value so far
2717
value += factor * token.value
2718
# Strip token from string
2719
s = token.regexp.sub("", s, 1)
2722
# Set valid next tokens
2723
followers = found_token.followers
2726
# No currently valid tokens were found
2727
raise ValueError("Invalid RFC 3339 duration: {!r}"
2733
2065
def string_to_delta(interval):
2734
2066
"""Parse a string and return a datetime.timedelta
2736
2068
>>> string_to_delta('7d')
2737
2069
datetime.timedelta(7)
2738
2070
>>> string_to_delta('60s')
2833
2160
parser.add_argument("--no-dbus", action="store_false",
2834
2161
dest="use_dbus", help="Do not provide D-Bus"
2835
" system bus interface", default=None)
2162
" system bus interface")
2836
2163
parser.add_argument("--no-ipv6", action="store_false",
2837
dest="use_ipv6", help="Do not use IPv6",
2164
dest="use_ipv6", help="Do not use IPv6")
2839
2165
parser.add_argument("--no-restore", action="store_false",
2840
2166
dest="restore", help="Do not restore stored"
2841
" state", default=None)
2842
parser.add_argument("--socket", type=int,
2843
help="Specify a file descriptor to a network"
2844
" socket to use instead of creating one")
2845
2168
parser.add_argument("--statedir", metavar="DIR",
2846
2169
help="Directory to save/restore state in")
2847
parser.add_argument("--foreground", action="store_true",
2848
help="Run in foreground", default=None)
2849
parser.add_argument("--no-zeroconf", action="store_false",
2850
dest="zeroconf", help="Do not use Zeroconf",
2853
2171
options = parser.parse_args()
2855
2173
if options.check:
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
2178
# Default values for config file for server-global settings
2861
server_defaults = {"interface": "",
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2179
server_defaults = { "interface": "",
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
"servicename": "Mandos",
2190
"statedir": "/var/lib/mandos"
2879
2193
# Parse config file for server-global settings
2880
2194
server_config = configparser.SafeConfigParser(server_defaults)
2881
2195
del server_defaults
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2196
server_config.read(os.path.join(options.configdir,
2883
2198
# Convert the SafeConfigParser object to a dict
2884
2199
server_settings = server_config.defaults()
2885
2200
# Use the appropriate methods on the non-string config options
2886
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2887
"foreground", "zeroconf"):
2201
for option in ("debug", "use_dbus", "use_ipv6"):
2888
2202
server_settings[option] = server_config.getboolean("DEFAULT",
2890
2204
if server_settings["port"]:
2891
2205
server_settings["port"] = server_config.getint("DEFAULT",
2893
if server_settings["socket"]:
2894
server_settings["socket"] = server_config.getint("DEFAULT",
2896
# Later, stdin will, and stdout and stderr might, be dup'ed
2897
# over with an opened os.devnull. But we don't want this to
2898
# happen with a supplied network socket.
2899
if 0 <= server_settings["socket"] <= 2:
2900
server_settings["socket"] = os.dup(server_settings
2902
2207
del server_config
2904
2209
# Override the settings from the config file with command line
2905
2210
# options, if set.
2906
2211
for option in ("interface", "address", "port", "debug",
2907
"priority", "servicename", "configdir", "use_dbus",
2908
"use_ipv6", "debuglevel", "restore", "statedir",
2909
"socket", "foreground", "zeroconf"):
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2910
2215
value = getattr(options, option)
2911
2216
if value is not None:
2912
2217
server_settings[option] = value
2914
2219
# Force all strings to be unicode
2915
2220
for option in server_settings.keys():
2916
if isinstance(server_settings[option], bytes):
2917
server_settings[option] = (server_settings[option]
2919
# Force all boolean options to be boolean
2920
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2921
"foreground", "zeroconf"):
2922
server_settings[option] = bool(server_settings[option])
2923
# Debug implies foreground
2924
if server_settings["debug"]:
2925
server_settings["foreground"] = True
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
2926
2223
# Now we have our good server settings in "server_settings"
2928
2225
##################################################################
2930
if (not server_settings["zeroconf"]
2931
and not (server_settings["port"]
2932
or server_settings["socket"] != "")):
2933
parser.error("Needs port or socket to work without Zeroconf")
2935
2227
# For convenience
2936
2228
debug = server_settings["debug"]
2937
2229
debuglevel = server_settings["debuglevel"]
2951
2241
level = getattr(logging, debuglevel.upper())
2952
2242
initlogger(debug, level)
2954
2244
if server_settings["servicename"] != "Mandos":
2955
syslogger.setFormatter(
2956
logging.Formatter('Mandos ({}) [%(process)d]:'
2957
' %(levelname)s: %(message)s'.format(
2958
server_settings["servicename"])))
2245
syslogger.setFormatter(logging.Formatter
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2960
2251
# Parse config file with clients
2961
2252
client_config = configparser.SafeConfigParser(Client
2962
2253
.client_defaults)
2963
2254
client_config.read(os.path.join(server_settings["configdir"],
2964
2255
"clients.conf"))
2966
2257
global mandos_dbus_service
2967
2258
mandos_dbus_service = None
2970
if server_settings["socket"] != "":
2971
socketfd = server_settings["socket"]
2972
tcp_server = MandosServer(
2973
(server_settings["address"], server_settings["port"]),
2975
interface=(server_settings["interface"] or None),
2977
gnutls_priority=server_settings["priority"],
2981
pidfilename = "/run/mandos.pid"
2982
if not os.path.isdir("/run/."):
2983
pidfilename = "/var/run/mandos.pid"
2260
tcp_server = MandosServer((server_settings["address"],
2261
server_settings["port"]),
2263
interface=(server_settings["interface"]
2267
server_settings["priority"],
2270
pidfilename = "/var/run/mandos.pid"
2986
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2272
pidfile = open(pidfilename, "w")
2987
2273
except IOError as e:
2988
2274
logger.error("Could not open file %r", pidfilename,
2991
for name, group in (("_mandos", "_mandos"),
2992
("mandos", "mandos"),
2993
("nobody", "nogroup")):
2277
for name in ("_mandos", "mandos", "nobody"):
2995
2279
uid = pwd.getpwnam(name).pw_uid
2996
gid = pwd.getpwnam(group).pw_gid
2280
gid = pwd.getpwnam(name).pw_gid
2998
2282
except KeyError:
3007
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3009
2290
except OSError as error:
3010
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3011
.format(uid, gid, os.strerror(error.errno)))
3012
2291
if error.errno != errno.EPERM:
3016
2295
# Enable all possible GnuTLS debugging
3018
2297
# "Use a log level over 10 to enable all debugging options."
3019
2298
# - GnuTLS manual
3020
gnutls.global_set_log_level(11)
2299
gnutls.library.functions.gnutls_global_set_log_level(11)
2301
@gnutls.library.types.gnutls_log_func
3023
2302
def debug_gnutls(level, string):
3024
2303
logger.debug("GnuTLS: %s", string[:-1])
3026
gnutls.global_set_log_function(debug_gnutls)
2305
(gnutls.library.functions
2306
.gnutls_global_set_log_function(debug_gnutls))
3028
2308
# Redirect stdin so all checkers get /dev/null
3029
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3030
2310
os.dup2(null, sys.stdin.fileno())
3034
2314
# Need to fork before connecting to D-Bus
3036
2316
# Close all input and output, do double fork, etc.
3039
# multiprocessing will use threads, so before we use GLib we need
3040
# to inform GLib that threads will be used.
2319
gobject.threads_init()
3043
2321
global main_loop
3044
2322
# From the Avahi example code
3045
2323
DBusGMainLoop(set_as_default=True)
3046
main_loop = GLib.MainLoop()
2324
main_loop = gobject.MainLoop()
3047
2325
bus = dbus.SystemBus()
3048
2326
# End of Avahi example code
3051
2329
bus_name = dbus.service.BusName("se.recompile.Mandos",
3054
old_bus_name = dbus.service.BusName(
3055
"se.bsnet.fukt.Mandos", bus,
3057
except dbus.exceptions.DBusException as e:
2330
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2334
except dbus.exceptions.NameExistsException as e:
3058
2335
logger.error("Disabling D-Bus:", exc_info=e)
3059
2336
use_dbus = False
3060
2337
server_settings["use_dbus"] = False
3061
2338
tcp_server.use_dbus = False
3063
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3064
service = AvahiServiceToSyslog(
3065
name=server_settings["servicename"],
3066
servicetype="_mandos._tcp",
3069
if server_settings["interface"]:
3070
service.interface = if_nametoindex(
3071
server_settings["interface"].encode("utf-8"))
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
2344
if server_settings["interface"]:
2345
service.interface = (if_nametoindex
2346
(str(server_settings["interface"])))
3073
2348
global multiprocessing_manager
3074
2349
multiprocessing_manager = multiprocessing.Manager()
3076
2351
client_class = Client
3078
client_class = functools.partial(ClientDBus, bus=bus)
2353
client_class = functools.partial(ClientDBus, bus = bus)
3080
2355
client_settings = Client.config_parser(client_config)
3081
2356
old_client_settings = {}
3082
2357
clients_data = {}
3084
# This is used to redirect stdout and stderr for checker processes
3086
wnull = open(os.devnull, "w") # A writable /dev/null
3087
# Only used if server is running in foreground but not in debug
3089
if debug or not foreground:
3092
2359
# Get client data and settings from last running state.
3093
2360
if server_settings["restore"]:
3095
2362
with open(stored_state_path, "rb") as stored_state:
3096
if sys.version_info.major == 2:
3097
clients_data, old_client_settings = pickle.load(
3100
bytes_clients_data, bytes_old_client_settings = (
3101
pickle.load(stored_state, encoding="bytes"))
3102
# Fix bytes to strings
3105
clients_data = {(key.decode("utf-8")
3106
if isinstance(key, bytes)
3109
bytes_clients_data.items()}
3110
del bytes_clients_data
3111
for key in clients_data:
3112
value = {(k.decode("utf-8")
3113
if isinstance(k, bytes) else k): v
3115
clients_data[key].items()}
3116
clients_data[key] = value
3118
value["client_structure"] = [
3120
if isinstance(s, bytes)
3122
value["client_structure"]]
3124
for k in ("name", "host"):
3125
if isinstance(value[k], bytes):
3126
value[k] = value[k].decode("utf-8")
3127
# old_client_settings
3129
old_client_settings = {
3130
(key.decode("utf-8")
3131
if isinstance(key, bytes)
3134
bytes_old_client_settings.items()}
3135
del bytes_old_client_settings
3137
for value in old_client_settings.values():
3138
if isinstance(value["host"], bytes):
3139
value["host"] = (value["host"]
2363
clients_data, old_client_settings = (pickle.load
3141
2365
os.remove(stored_state_path)
3142
2366
except IOError as e:
3143
2367
if e.errno == errno.ENOENT:
3144
logger.warning("Could not load persistent state:"
3145
" {}".format(os.strerror(e.errno)))
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
3147
2371
logger.critical("Could not load persistent state:",
3150
2374
except EOFError as e:
3151
2375
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
3155
2378
with PGPEngine() as pgp:
3156
for client_name, client in clients_data.items():
3157
# Skip removed clients
3158
if client_name not in client_settings:
2379
for client_name, client in clients_data.iteritems():
3161
2380
# Decide which value to use after restoring saved state.
3162
2381
# We have three different values: Old config file,
3163
2382
# new config file, and saved state.
3221
2440
for client_name in (set(client_settings)
3222
2441
- set(old_client_settings)):
3223
2442
clients_data[client_name] = client_settings[client_name]
3225
2444
# Create all client objects
3226
for client_name, client in clients_data.items():
2445
for client_name, client in clients_data.iteritems():
3227
2446
tcp_server.clients[client_name] = client_class(
3230
server_settings=server_settings)
2447
name = client_name, settings = client)
3232
2449
if not tcp_server.clients:
3233
2450
logger.warning("No clients defined")
3236
if pidfile is not None:
3240
print(pid, file=pidfile)
3242
logger.error("Could not write to file %r with PID %d",
2456
pidfile.write(str(pid) + "\n".encode("utf-8"))
2459
logger.error("Could not write to file %r with PID %d",
2462
# "pidfile" was never created
3245
2464
del pidfilename
3247
for termsig in (signal.SIGHUP, signal.SIGTERM):
3248
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3249
lambda: main_loop.quit() and False)
2466
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3253
@alternate_dbus_interfaces(
3254
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3255
class MandosDBusService(DBusObjectWithObjectManager):
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
3256
2473
"""A D-Bus proxy object"""
3258
2474
def __init__(self):
3259
2475
dbus.service.Object.__init__(self, bus, "/")
3261
2476
_interface = "se.recompile.Mandos"
2478
@dbus_interface_annotations(_interface)
2480
return { "org.freedesktop.DBus.Property"
2481
".EmitsChangedSignal":
3263
2484
@dbus.service.signal(_interface, signature="o")
3264
2485
def ClientAdded(self, objpath):
3268
2489
@dbus.service.signal(_interface, signature="ss")
3269
2490
def ClientNotFound(self, fingerprint, address):
3273
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
2494
@dbus.service.signal(_interface, signature="os")
3276
2495
def ClientRemoved(self, objpath, name):
3280
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
2499
@dbus.service.method(_interface, out_signature="ao")
3283
2500
def GetAllClients(self):
3285
return dbus.Array(c.dbus_object_path for c in
3286
tcp_server.clients.values())
3288
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2502
return dbus.Array(c.dbus_object_path
2504
tcp_server.clients.itervalues())
3290
2506
@dbus.service.method(_interface,
3291
2507
out_signature="a{oa{sv}}")
3292
2508
def GetAllClientsWithProperties(self):
3294
2510
return dbus.Dictionary(
3295
{c.dbus_object_path: c.GetAll(
3296
"se.recompile.Mandos.Client")
3297
for c in tcp_server.clients.values()},
2511
((c.dbus_object_path, c.GetAll(""))
2512
for c in tcp_server.clients.itervalues()),
3298
2513
signature="oa{sv}")
3300
2515
@dbus.service.method(_interface, in_signature="o")
3301
2516
def RemoveClient(self, object_path):
3303
for c in tcp_server.clients.values():
2518
for c in tcp_server.clients.itervalues():
3304
2519
if c.dbus_object_path == object_path:
3305
2520
del tcp_server.clients[c.name]
3306
2521
c.remove_from_connection()
3307
# Don't signal the disabling
2522
# Don't signal anything except ClientRemoved
3308
2523
c.disable(quiet=True)
3309
# Emit D-Bus signal for removal
3310
self.client_removed_signal(c)
2525
self.ClientRemoved(object_path, c.name)
3312
2527
raise KeyError(object_path)
3316
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3317
out_signature="a{oa{sa{sv}}}")
3318
def GetManagedObjects(self):
3320
return dbus.Dictionary(
3321
{client.dbus_object_path:
3323
{interface: client.GetAll(interface)
3325
client._get_all_interface_names()})
3326
for client in tcp_server.clients.values()})
3328
def client_added_signal(self, client):
3329
"""Send the new standard signal and the old signal"""
3331
# New standard signal
3332
self.InterfacesAdded(
3333
client.dbus_object_path,
3335
{interface: client.GetAll(interface)
3337
client._get_all_interface_names()}))
3339
self.ClientAdded(client.dbus_object_path)
3341
def client_removed_signal(self, client):
3342
"""Send the new standard signal and the old signal"""
3344
# New standard signal
3345
self.InterfacesRemoved(
3346
client.dbus_object_path,
3347
client._get_all_interface_names())
3349
self.ClientRemoved(client.dbus_object_path,
3352
2531
mandos_dbus_service = MandosDBusService()
3354
# Save modules to variables to exempt the modules from being
3355
# unloaded before the function registered with atexit() is run.
3356
mp = multiprocessing
3360
2534
"Cleanup function; run on exit"
3364
mp.active_children()
2537
multiprocessing.active_children()
3366
2538
if not (tcp_server.clients or client_settings):
3369
2541
# Store client before exiting. Secrets are encrypted with key
3370
2542
# based on what config file has. If config file is
3371
2543
# removed/edited, old secret will thus be unrecovable.
3373
2545
with PGPEngine() as pgp:
3374
for client in tcp_server.clients.values():
2546
for client in tcp_server.clients.itervalues():
3375
2547
key = client_settings[client.name]["secret"]
3376
2548
client.encrypted_secret = pgp.encrypt(client.secret,
3378
2550
client_dict = {}
3380
2552
# A list of attributes that can not be pickled
3382
exclude = {"bus", "changedstate", "secret",
3383
"checker", "server_settings"}
3384
for name, typ in inspect.getmembers(dbus.service
2554
exclude = set(("bus", "changedstate", "secret",
2556
for name, typ in (inspect.getmembers
2557
(dbus.service.Object)):
3386
2558
exclude.add(name)
3388
2560
client_dict["encrypted_secret"] = (client
3389
2561
.encrypted_secret)
3390
2562
for attr in client.client_structure:
3391
2563
if attr not in exclude:
3392
2564
client_dict[attr] = getattr(client, attr)
3394
2566
clients[client.name] = client_dict
3395
2567
del client_settings[client.name]["secret"]
3398
with tempfile.NamedTemporaryFile(
3402
dir=os.path.dirname(stored_state_path),
3403
delete=False) as stored_state:
3404
pickle.dump((clients, client_settings), stored_state,
3406
tempname = stored_state.name
2570
with (tempfile.NamedTemporaryFile
2571
(mode='wb', suffix=".pickle", prefix='clients-',
2572
dir=os.path.dirname(stored_state_path),
2573
delete=False)) as stored_state:
2574
pickle.dump((clients, client_settings), stored_state)
2575
tempname=stored_state.name
3407
2576
os.rename(tempname, stored_state_path)
3408
2577
except (IOError, OSError) as e: