65
import cPickle as pickle
70
import cPickle as pickle
66
73
import multiprocessing
74
82
import dbus.service
84
from gi.repository import GLib
77
85
from dbus.mainloop.glib import DBusGMainLoop
80
88
import xml.dom.minidom
91
# Try to find the value of SO_BINDTODEVICE:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
84
95
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
96
except AttributeError:
98
# This is where SO_BINDTODEVICE was up to and including Python
87
100
from IN import SO_BINDTODEVICE
88
101
except ImportError:
89
SO_BINDTODEVICE = None
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
114
SO_BINDTODEVICE = None
116
if sys.version_info.major == 2:
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
92
123
stored_state_file = "clients.pickle"
94
125
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
103
131
except (OSError, AttributeError):
104
133
def if_nametoindex(interface):
105
134
"Get an interface index the hard way, i.e. using fcntl()"
106
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
136
with contextlib.closing(socket.socket()) as s:
108
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
140
return interface_index
143
def copy_function(func):
144
"""Make a copy of a function"""
145
if sys.version_info.major == 2:
146
return types.FunctionType(func.func_code,
152
return types.FunctionType(func.__code__,
116
159
def initlogger(debug, level=logging.WARNING):
117
160
"""init logger and add loglevel"""
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
119
166
syslogger.setFormatter(logging.Formatter
120
167
('Mandos [%(process)d]: %(levelname)s:'
122
169
logger.addHandler(syslogger)
125
172
console = logging.StreamHandler()
126
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
179
240
.replace(b"\n", b"\\n")
180
241
.replace(b"\0", b"\\x00"))
183
244
def encrypt(self, data, password):
184
245
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
187
248
passfile.write(passphrase)
189
proc = subprocess.Popen(['gpg', '--symmetric',
250
proc = subprocess.Popen([self.gpg, '--symmetric',
190
251
'--passphrase-file',
192
253
+ self.gnupgargs,
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
197
258
if proc.returncode != 0:
198
259
raise PGPError(err)
199
260
return ciphertext
201
262
def decrypt(self, data, password):
202
263
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
205
266
passfile.write(passphrase)
207
proc = subprocess.Popen(['gpg', '--decrypt',
268
proc = subprocess.Popen([self.gpg, '--decrypt',
208
269
'--passphrase-file',
210
271
+ self.gnupgargs,
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
216
276
if proc.returncode != 0:
217
277
raise PGPError(err)
218
278
return decrypted_plaintext
281
# Pretend that we have an Avahi module
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
221
307
class AvahiError(Exception):
222
308
def __init__(self, value, *args, **kwargs):
223
309
self.value = value
224
super(AvahiError, self).__init__(value, *args, **kwargs)
225
def __unicode__(self):
226
return unicode(repr(self.value))
310
return super(AvahiError, self).__init__(value, *args,
228
314
class AvahiServiceError(AvahiError):
231
318
class AvahiGroupError(AvahiError):
235
322
class AvahiService(object):
236
323
"""An Avahi (Zeroconf) service.
239
326
interface: integer; avahi.IF_UNSPEC or an interface index.
240
327
Used to optionally bind to the specified interface.
383
492
follow_name_owner_changes=True),
384
493
avahi.DBUS_INTERFACE_SERVER)
385
494
self.server.connect_to_signal("StateChanged",
386
self.server_state_changed)
495
self.server_state_changed)
387
496
self.server_state_changed(self.server.GetState())
390
499
class AvahiServiceToSyslog(AvahiService):
500
def rename(self, *args, **kwargs):
392
501
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
401
def timedelta_to_milliseconds(td):
402
"Convert a datetime.timedelta() to milliseconds"
403
return ((td.days * 24 * 60 * 60 * 1000)
404
+ (td.seconds * 1000)
405
+ (td.microseconds // 1000))
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
513
library = ctypes.util.find_library("gnutls")
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
531
E_NO_CERTIFICATE_FOUND = -49
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
540
class session_int(ctypes.Structure):
542
session_t = ctypes.POINTER(session_int)
544
class certificate_credentials_st(ctypes.Structure):
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
554
class openpgp_crt_int(ctypes.Structure):
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
564
class Error(Exception):
565
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
575
class CertificateSecurityError(Error):
579
class Credentials(object):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
587
gnutls.certificate_free_credentials(self._c_object)
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
609
self.credentials = credentials
612
gnutls.deinit(self._c_object)
615
return gnutls.handshake(self._c_object)
617
def send(self, data):
621
data_len -= gnutls.record_send(self._c_object,
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
686
handshake_set_private_extensions.restype = None
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
691
credentials_set.restype = _error_code
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
746
class pubkey_st(ctypes.Structure):
748
pubkey_t = ctypes.POINTER(pubkey_st)
750
x509_crt_fmt_t = ctypes.c_int
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
760
pubkey_import.restype = _error_code
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
772
# All the function declarations below are from gnutls/openpgp.h
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
782
openpgp_crt_import.restype = _error_code
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
openpgp_crt_get_fingerprint.restype = _error_code
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
806
# Remove non-public functions
807
del _error_code, _retry_on_error
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
817
connection.send(func(*args, **kwargs))
408
821
class Client(object):
409
822
"""A representation of a client host served by this server.
412
825
approved: bool(); 'None' if not yet approved/disapproved
413
826
approval_delay: datetime.timedelta(); Time to wait for approval
414
827
approval_duration: datetime.timedelta(); Duration of one approval
415
checker: subprocess.Popen(); a running checker process used
416
to see if the client lives.
417
'None' if no process is running.
418
checker_callback_tag: a gobject event source tag, or None
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
831
checker_callback_tag: a GLib event source tag, or None
419
832
checker_command: string; External command which is run to check
420
833
if client lives. %() expansions are done at
421
834
runtime with vars(self) as dict, so that for
422
835
instance %(name)s can be used in the command.
423
checker_initiator_tag: a gobject event source tag, or None
836
checker_initiator_tag: a GLib event source tag, or None
424
837
created: datetime.datetime(); (UTC) object creation
425
838
client_structure: Object describing what attributes a client has
426
839
and is used for storing the client at exit
427
840
current_checker_command: string; current running checker_command
428
disable_initiator_tag: a gobject event source tag, or None
841
disable_initiator_tag: a GLib event source tag, or None
430
843
fingerprint: string (40 or 32 hexadecimal digits); used to
431
uniquely identify the client
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
432
847
host: string; available for use by the checker command
433
848
interval: datetime.timedelta(); How often to start a new checker
434
849
last_approval_request: datetime.datetime(); (UTC) or None
601
1006
logger.info("Disabling client %s", self.name)
602
1007
if getattr(self, "disable_initiator_tag", None) is not None:
603
gobject.source_remove(self.disable_initiator_tag)
1008
GLib.source_remove(self.disable_initiator_tag)
604
1009
self.disable_initiator_tag = None
605
1010
self.expires = None
606
1011
if getattr(self, "checker_initiator_tag", None) is not None:
607
gobject.source_remove(self.checker_initiator_tag)
1012
GLib.source_remove(self.checker_initiator_tag)
608
1013
self.checker_initiator_tag = None
609
1014
self.stop_checker()
610
1015
self.enabled = False
612
1017
self.send_changedstate()
613
# Do not run this again if called by a gobject.timeout_add
1018
# Do not run this again if called by a GLib.timeout_add
616
1021
def __del__(self):
619
1024
def init_checker(self):
620
1025
# Schedule a new checker to be started an 'interval' from now,
621
1026
# and every interval from then on.
622
1027
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
624
self.checker_initiator_tag = (gobject.timeout_add
625
(self.interval_milliseconds(),
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
627
1032
# Schedule a disable() when 'timeout' has passed
628
1033
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
self.disable_initiator_tag = (gobject.timeout_add
631
(self.timeout_milliseconds(),
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
633
1037
# Also start a new checker *right now*.
634
1038
self.start_checker()
636
def checker_callback(self, pid, condition, command):
1040
def checker_callback(self, source, condition, connection,
637
1042
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
638
1047
self.checker_callback_tag = None
639
1048
self.checker = None
640
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
642
1053
if self.last_checker_status == 0:
643
1054
logger.info("Checker for %(name)s succeeded",
645
1056
self.checked_ok()
647
logger.info("Checker for %(name)s failed",
1058
logger.info("Checker for %(name)s failed", vars(self))
650
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
651
1062
logger.warning("Checker for %(name)s crashed?",
654
1066
def checked_ok(self):
655
1067
"""Assert that the client has been seen, alive and well."""
656
1068
self.last_checked_ok = datetime.datetime.utcnow()
657
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
658
1071
self.bump_timeout()
660
1073
def bump_timeout(self, timeout=None):
661
1074
"""Bump up the timeout for this client."""
662
1075
if timeout is None:
663
1076
timeout = self.timeout
664
1077
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
1078
GLib.source_remove(self.disable_initiator_tag)
666
1079
self.disable_initiator_tag = None
667
1080
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
670
(timeout), self.disable))
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
671
1083
self.expires = datetime.datetime.utcnow() + timeout
673
1085
def need_approval(self):
674
1086
self.last_approval_request = datetime.datetime.utcnow()
676
1088
def start_checker(self):
677
1089
"""Start a new checker subprocess if one is not running.
679
1091
If a checker already exists, leave it running and do
681
1093
# The reason for not killing a running checker is that if we
686
1098
# checkers alone, the checker would have to take more time
687
1099
# than 'timeout' for the client to be disabled, which is as it
690
# If a checker exists, make sure it is not a zombie
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
695
except OSError as error:
696
if error.errno != errno.ECHILD:
700
logger.warning("Checker was a zombie")
701
gobject.source_remove(self.checker_callback_tag)
702
self.checker_callback(pid, status,
703
self.current_checker_command)
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
704
1106
# Start a new checker if needed
705
1107
if self.checker is None:
706
1108
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
710
self.runtime_expansions)
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
712
1113
command = self.checker_command % escaped_attrs
713
1114
except TypeError as error:
714
1115
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
1116
self.checker_command,
1118
return True # Try again later
717
1119
self.current_checker_command = command
719
logger.info("Starting checker %r for %s",
721
# We don't need to redirect stdout and stderr, since
722
# in normal mode, that is already done by daemon(),
723
# and in debug mode we don't want to. (Stdin is
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
733
self.checker = subprocess.Popen(command,
737
except OSError as error:
738
logger.error("Failed to start subprocess",
741
self.checker_callback_tag = (gobject.child_watch_add
743
self.checker_callback,
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
749
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
759
# Re-run this periodically if run by gobject.timeout_add
1120
logger.info("Starting checker %r for %s", command,
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1129
popen_args = {"close_fds": True,
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1139
args=(pipe[1], subprocess.call, command),
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
762
1148
def stop_checker(self):
763
1149
"""Force the checker process, if any, to stop."""
764
1150
if self.checker_callback_tag:
765
gobject.source_remove(self.checker_callback_tag)
1151
GLib.source_remove(self.checker_callback_tag)
766
1152
self.checker_callback_tag = None
767
1153
if getattr(self, "checker", None) is None:
769
1155
logger.debug("Stopping checker for %(name)s", vars(self))
771
self.checker.terminate()
773
#if self.checker.poll() is None:
774
# self.checker.kill()
775
except OSError as error:
776
if error.errno != errno.ESRCH: # No such process
1156
self.checker.terminate()
778
1157
self.checker = None
781
def dbus_service_property(dbus_interface, signature="v",
782
access="readwrite", byte_arrays=False):
1160
def dbus_service_property(dbus_interface,
783
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
784
1165
become properties on the D-Bus.
786
1167
The decorated method will be called with no arguments by "Get"
787
1168
and with one argument by "Set".
789
1170
The parameters, where they are supported, are the same as
790
1171
dbus.service.method, except there is only "signature", since the
791
1172
type from Get() and the type sent to Set() is the same.
867
class DBusObjectWithProperties(dbus.service.Object):
868
"""A D-Bus object with properties.
870
Classes inheriting from this can use the dbus_service_property
871
decorator to expose methods as D-Bus properties. It exposes the
872
standard Get(), Set(), and GetAll() methods on the D-Bus.
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
876
1263
def _is_dbus_thing(thing):
877
1264
"""Returns a function testing if an attribute is a D-Bus thing
879
1266
If called like _is_dbus_thing("method") it returns a function
880
1267
suitable for use as predicate to inspect.getmembers().
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
885
1272
def _get_all_dbus_things(self, thing):
886
1273
"""Returns a generator of (name, attribute) pairs
888
return ((getattr(athing.__get__(self), "_dbus_name",
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
890
1276
athing.__get__(self))
891
1277
for cls in self.__class__.__mro__
892
1278
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1288
Inserts annotation tags on methods and signals.
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1293
document = xml.dom.minidom.parseString(xmlstring)
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1333
arg.setAttribute("name",
1335
xmlstring = document.toxml("utf-8")
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1345
"""A D-Bus object with properties.
1347
Classes inheriting from this can use the dbus_service_property
1348
decorator to expose methods as D-Bus properties. It exposes the
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
896
1352
def _get_dbus_property(self, interface_name, property_name):
897
1353
"""Returns a bound method if one exists which is a D-Bus
898
1354
property with the specified name and interface.
900
for cls in self.__class__.__mro__:
901
for name, value in (inspect.getmembers
903
self._is_dbus_thing("property"))):
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
904
1359
if (value._dbus_name == property_name
905
1360
and value._dbus_interface == interface_name):
906
1361
return value.__get__(self)
908
1363
# No such property
909
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
+ interface_name + "."
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1374
if name is not None)
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
914
1378
out_signature="v")
915
1379
def Get(self, interface_name, property_name):
916
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
1048
1509
return xmlstring
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1526
Note: No signals are sent automatically; they must be sent
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1558
document = xml.dom.minidom.parseString(xmlstring)
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1572
"objpath_interfaces"
1574
xmlstring = document.toxml("utf-8")
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1051
1583
def datetime_to_dbus(dt, variant_level=0):
1052
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1054
return dbus.String("", variant_level = variant_level)
1055
return dbus.String(dt.isoformat(),
1056
variant_level=variant_level)
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1059
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1412
1951
server to mandos-client
1416
1955
# Rejected - signal
1417
1956
@dbus.service.signal(_interface, signature="s")
1418
1957
def Rejected(self, reason):
1422
1961
# NeedApproval - signal
1423
1962
@dbus.service.signal(_interface, signature="tb")
1424
1963
def NeedApproval(self, timeout, default):
1426
1965
return self.need_approval()
1430
1969
# Approve - method
1431
1970
@dbus.service.method(_interface, in_signature="b")
1432
1971
def Approve(self, value):
1433
1972
self.approve(value)
1435
1974
# CheckedOK - method
1436
1975
@dbus.service.method(_interface)
1437
1976
def CheckedOK(self):
1438
1977
self.checked_ok()
1440
1979
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1441
1981
@dbus.service.method(_interface)
1442
1982
def Enable(self):
1446
1986
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1447
1988
@dbus.service.method(_interface)
1448
1989
def StartChecker(self):
1450
1991
self.start_checker()
1452
1993
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1453
1995
@dbus.service.method(_interface)
1454
1996
def Disable(self):
1458
2000
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1459
2002
@dbus.service.method(_interface)
1460
2003
def StopChecker(self):
1461
2004
self.stop_checker()
1465
2008
# ApprovalPending - property
1466
2009
@dbus_service_property(_interface, signature="b", access="read")
1467
2010
def ApprovalPending_dbus_property(self):
1468
2011
return dbus.Boolean(bool(self.approvals_pending))
1470
2013
# ApprovedByDefault - property
1471
@dbus_service_property(_interface, signature="b",
2014
@dbus_service_property(_interface,
1472
2016
access="readwrite")
1473
2017
def ApprovedByDefault_dbus_property(self, value=None):
1474
2018
if value is None: # get
1475
2019
return dbus.Boolean(self.approved_by_default)
1476
2020
self.approved_by_default = bool(value)
1478
2022
# ApprovalDelay - property
1479
@dbus_service_property(_interface, signature="t",
2023
@dbus_service_property(_interface,
1480
2025
access="readwrite")
1481
2026
def ApprovalDelay_dbus_property(self, value=None):
1482
2027
if value is None: # get
1483
return dbus.UInt64(self.approval_delay_milliseconds())
2028
return dbus.UInt64(self.approval_delay.total_seconds()
1484
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1486
2032
# ApprovalDuration - property
1487
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
1488
2035
access="readwrite")
1489
2036
def ApprovalDuration_dbus_property(self, value=None):
1490
2037
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1492
self.approval_duration))
2038
return dbus.UInt64(self.approval_duration.total_seconds()
1493
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1495
2042
# Name - property
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1496
2045
@dbus_service_property(_interface, signature="s", access="read")
1497
2046
def Name_dbus_property(self):
1498
2047
return dbus.String(self.name)
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
1500
2056
# Fingerprint - property
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1501
2059
@dbus_service_property(_interface, signature="s", access="read")
1502
2060
def Fingerprint_dbus_property(self):
1503
2061
return dbus.String(self.fingerprint)
1505
2063
# Host - property
1506
@dbus_service_property(_interface, signature="s",
2064
@dbus_service_property(_interface,
1507
2066
access="readwrite")
1508
2067
def Host_dbus_property(self, value=None):
1509
2068
if value is None: # get
1510
2069
return dbus.String(self.host)
1511
self.host = unicode(value)
2070
self.host = str(value)
1513
2072
# Created - property
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1514
2075
@dbus_service_property(_interface, signature="s", access="read")
1515
2076
def Created_dbus_property(self):
1516
2077
return datetime_to_dbus(self.created)
1518
2079
# LastEnabled - property
1519
2080
@dbus_service_property(_interface, signature="s", access="read")
1520
2081
def LastEnabled_dbus_property(self):
1521
2082
return datetime_to_dbus(self.last_enabled)
1523
2084
# Enabled - property
1524
@dbus_service_property(_interface, signature="b",
2085
@dbus_service_property(_interface,
1525
2087
access="readwrite")
1526
2088
def Enabled_dbus_property(self, value=None):
1527
2089
if value is None: # get
1575
2138
if (getattr(self, "disable_initiator_tag", None)
1578
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
1584
2146
# ExtendedTimeout - property
1585
@dbus_service_property(_interface, signature="t",
2147
@dbus_service_property(_interface,
1586
2149
access="readwrite")
1587
2150
def ExtendedTimeout_dbus_property(self, value=None):
1588
2151
if value is None: # get
1589
return dbus.UInt64(self.extended_timeout_milliseconds())
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
1590
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1592
2156
# Interval - property
1593
@dbus_service_property(_interface, signature="t",
2157
@dbus_service_property(_interface,
1594
2159
access="readwrite")
1595
2160
def Interval_dbus_property(self, value=None):
1596
2161
if value is None: # get
1597
return dbus.UInt64(self.interval_milliseconds())
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1598
2163
self.interval = datetime.timedelta(0, 0, 0, value)
1599
2164
if getattr(self, "checker_initiator_tag", None) is None:
1601
2166
if self.enabled:
1602
2167
# Reschedule checker run
1603
gobject.source_remove(self.checker_initiator_tag)
1604
self.checker_initiator_tag = (gobject.timeout_add
1605
(value, self.start_checker))
1606
self.start_checker() # Start one now, too
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
1608
2173
# Checker - property
1609
@dbus_service_property(_interface, signature="s",
2174
@dbus_service_property(_interface,
1610
2176
access="readwrite")
1611
2177
def Checker_dbus_property(self, value=None):
1612
2178
if value is None: # get
1613
2179
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
2180
self.checker_command = str(value)
1616
2182
# CheckerRunning - property
1617
@dbus_service_property(_interface, signature="b",
2183
@dbus_service_property(_interface,
1618
2185
access="readwrite")
1619
2186
def CheckerRunning_dbus_property(self, value=None):
1620
2187
if value is None: # get
1793
2371
delay -= time2 - time
1796
while sent_size < len(client.secret):
1798
sent = session.send(client.secret[sent_size:])
1799
except gnutls.errors.GNUTLSError as error:
1800
logger.warning("gnutls send failed",
1803
logger.debug("Sent: %d, remaining: %d",
1804
sent, len(client.secret)
1805
- (sent_size + sent))
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
1808
2380
logger.info("Sending secret to %s", client.name)
1809
2381
# bump the timeout using extended_timeout
1810
2382
client.bump_timeout(client.extended_timeout)
1811
2383
if self.server.use_dbus:
1812
2384
# Emit D-Bus signal
1813
2385
client.GotSecret()
1816
2388
if approval_required:
1817
2389
client.approvals_pending -= 1
1820
except gnutls.errors.GNUTLSError as error:
2392
except gnutls.Error as error:
1821
2393
logger.warning("GnuTLS bye failed",
1822
2394
exc_info=error)
1825
2397
def peer_certificate(session):
1826
"Return the peer's OpenPGP certificate as a bytestring"
1827
# If not an OpenPGP certificate...
1828
if (gnutls.library.functions
1829
.gnutls_certificate_type_get(session._c_object)
1830
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1831
# ...do the normal thing
1832
return session.peer_certificate
2398
"Return the peer's certificate as a bytestring"
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2412
# ...return invalid data
1833
2414
list_size = ctypes.c_uint(1)
1834
cert_list = (gnutls.library.functions
1835
.gnutls_certificate_get_peers
2415
cert_list = (gnutls.certificate_get_peers
1836
2416
(session._c_object, ctypes.byref(list_size)))
1837
2417
if not bool(cert_list) and list_size.value != 0:
1838
raise gnutls.errors.GNUTLSError("error getting peer"
2418
raise gnutls.Error("error getting peer certificate")
1840
2419
if list_size.value == 0:
1842
2421
cert = cert_list[0]
1843
2422
return ctypes.string_at(cert.data, cert.size)
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
1846
2459
def fingerprint(openpgp):
1847
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1848
2461
# New GnuTLS "datum" with the OpenPGP public key
1849
datum = (gnutls.library.types
1850
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1853
ctypes.c_uint(len(openpgp))))
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1854
2466
# New empty GnuTLS certificate
1855
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1858
2469
# Import the OpenPGP public key into the certificate
1859
(gnutls.library.functions
1860
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1861
gnutls.library.constants
1862
.GNUTLS_OPENPGP_FMT_RAW))
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1863
2472
# Verify the self signature in the key
1864
2473
crtverify = ctypes.c_uint()
1865
(gnutls.library.functions
1866
.gnutls_openpgp_crt_verify_self(crt, 0,
1867
ctypes.byref(crtverify)))
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1868
2476
if crtverify.value != 0:
1869
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1870
raise (gnutls.errors.CertificateSecurityError
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
1872
2480
# New buffer for the fingerprint
1873
2481
buf = ctypes.create_string_buffer(20)
1874
2482
buf_len = ctypes.c_size_t()
1875
2483
# Get the fingerprint from the certificate into the buffer
1876
(gnutls.library.functions
1877
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1878
ctypes.byref(buf_len)))
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1879
2486
# Deinit the certificate
1880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2487
gnutls.openpgp_crt_deinit(crt)
1881
2488
# Convert the buffer to a Python bytestring
1882
2489
fpr = ctypes.string_at(buf, buf_len.value)
1883
2490
# Convert the bytestring to hexadecimal notation
1966
2579
# socket_wrapper(), if socketfd was set.
1967
2580
socketserver.TCPServer.__init__(self, server_address,
1968
2581
RequestHandlerClass)
1970
2583
def server_bind(self):
1971
2584
"""This overrides the normal server_bind() function
1972
2585
to bind to an interface if one was specified, and also NOT to
1973
2586
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
1974
2588
if self.interface is not None:
1975
2589
if SO_BINDTODEVICE is None:
1976
logger.error("SO_BINDTODEVICE does not exist;"
1977
" cannot bind to interface %s",
1981
self.socket.setsockopt(socket.SOL_SOCKET,
1983
str(self.interface + '\0'))
1984
except socket.error as error:
1985
if error.errno == errno.EPERM:
1986
logger.error("No permission to bind to"
1987
" interface %s", self.interface)
1988
elif error.errno == errno.ENOPROTOOPT:
1989
logger.error("SO_BINDTODEVICE not available;"
1990
" cannot bind to interface %s",
1992
elif error.errno == errno.ENODEV:
1993
logger.error("Interface %s does not exist,"
1994
" cannot bind", self.interface)
2590
# Fall back to a hard-coded value which seems to be
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
1997
2611
# Only bind(2) the socket if we really need to.
1998
2612
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
1999
2615
if not self.server_address[0]:
2000
2616
if self.address_family == socket.AF_INET6:
2001
any_address = "::" # in6addr_any
2617
any_address = "::" # in6addr_any
2003
any_address = "0.0.0.0" # INADDR_ANY
2619
any_address = "0.0.0.0" # INADDR_ANY
2004
2620
self.server_address = (any_address,
2005
2621
self.server_address[1])
2006
2622
elif not self.server_address[1]:
2007
self.server_address = (self.server_address[0],
2623
self.server_address = (self.server_address[0], 0)
2009
2624
# if self.interface:
2010
2625
# self.server_address = (self.server_address[0],
2036
2656
self.gnutls_priority = gnutls_priority
2037
2657
IPv6_TCPServer.__init__(self, server_address,
2038
2658
RequestHandlerClass,
2039
interface = interface,
2040
use_ipv6 = use_ipv6,
2041
socketfd = socketfd)
2659
interface=interface,
2042
2663
def server_activate(self):
2043
2664
if self.enabled:
2044
2665
return socketserver.TCPServer.server_activate(self)
2046
2667
def enable(self):
2047
2668
self.enabled = True
2049
2670
def add_pipe(self, parent_pipe, proc):
2050
2671
# Call "handle_ipc" for both data and EOF events
2051
gobject.io_add_watch(parent_pipe.fileno(),
2052
gobject.IO_IN | gobject.IO_HUP,
2053
functools.partial(self.handle_ipc,
2058
def handle_ipc(self, source, condition, parent_pipe=None,
2059
proc = None, client_object=None):
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2679
def handle_ipc(self, source, condition,
2682
client_object=None):
2060
2683
# error, or the other end of multiprocessing.Pipe has closed
2061
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2062
2685
# Wait for other process to exit
2066
2689
# Read a request from the child
2067
2690
request = parent_pipe.recv()
2068
2691
command = request[0]
2070
2693
if command == 'init':
2072
address = request[2]
2074
for c in self.clients.itervalues():
2075
if c.fingerprint == fpr:
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2701
if key_id and c.key_id == key_id:
2704
if fpr and c.fingerprint == fpr:
2079
logger.info("Client not found for fingerprint: %s, ad"
2080
"dress: %s", fpr, address)
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
2081
2710
if self.use_dbus:
2082
2711
# Emit D-Bus signal
2083
mandos_dbus_service.ClientNotFound(fpr,
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
2085
2714
parent_pipe.send(False)
2088
gobject.io_add_watch(parent_pipe.fileno(),
2089
gobject.IO_IN | gobject.IO_HUP,
2090
functools.partial(self.handle_ipc,
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2723
client_object=client))
2096
2724
parent_pipe.send(True)
2097
2725
# remove the old hook in favor of the new above hook on
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2485
3133
except OSError as error:
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
2486
3136
if error.errno != errno.EPERM:
2490
3140
# Enable all possible GnuTLS debugging
2492
3142
# "Use a log level over 10 to enable all debugging options."
2493
3143
# - GnuTLS manual
2494
gnutls.library.functions.gnutls_global_set_log_level(11)
2496
@gnutls.library.types.gnutls_log_func
3144
gnutls.global_set_log_level(11)
2497
3147
def debug_gnutls(level, string):
2498
3148
logger.debug("GnuTLS: %s", string[:-1])
2500
(gnutls.library.functions
2501
.gnutls_global_set_log_function(debug_gnutls))
3150
gnutls.global_set_log_function(debug_gnutls)
2503
3152
# Redirect stdin so all checkers get /dev/null
2504
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2505
3154
os.dup2(null, sys.stdin.fileno())
2509
3158
# Need to fork before connecting to D-Bus
2510
3159
if not foreground:
2511
3160
# Close all input and output, do double fork, etc.
2514
# multiprocessing will use threads, so before we use gobject we
2515
# need to inform gobject that threads will be used.
2516
gobject.threads_init()
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
2518
3168
global main_loop
2519
3169
# From the Avahi example code
2520
3170
DBusGMainLoop(set_as_default=True)
2521
main_loop = gobject.MainLoop()
3171
main_loop = GLib.MainLoop()
2522
3172
bus = dbus.SystemBus()
2523
3173
# End of Avahi example code
2526
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2527
bus, do_not_queue=True)
2528
old_bus_name = (dbus.service.BusName
2529
("se.bsnet.fukt.Mandos", bus,
2531
except dbus.exceptions.NameExistsException as e:
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3182
except dbus.exceptions.DBusException as e:
2532
3183
logger.error("Disabling D-Bus:", exc_info=e)
2533
3184
use_dbus = False
2534
3185
server_settings["use_dbus"] = False
2535
3186
tcp_server.use_dbus = False
2536
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2537
service = AvahiServiceToSyslog(name =
2538
server_settings["servicename"],
2539
servicetype = "_mandos._tcp",
2540
protocol = protocol, bus = bus)
2541
if server_settings["interface"]:
2542
service.interface = (if_nametoindex
2543
(str(server_settings["interface"])))
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
2545
3198
global multiprocessing_manager
2546
3199
multiprocessing_manager = multiprocessing.Manager()
2548
3201
client_class = Client
2550
client_class = functools.partial(ClientDBus, bus = bus)
3203
client_class = functools.partial(ClientDBus, bus=bus)
2552
3205
client_settings = Client.config_parser(client_config)
2553
3206
old_client_settings = {}
2554
3207
clients_data = {}
2556
3209
# This is used to redirect stdout and stderr for checker processes
2558
wnull = open(os.devnull, "w") # A writable /dev/null
3211
wnull = open(os.devnull, "w") # A writable /dev/null
2559
3212
# Only used if server is running in foreground but not in debug
2561
3214
if debug or not foreground:
2564
3217
# Get client data and settings from last running state.
2565
3218
if server_settings["restore"]:
2567
3220
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3240
clients_data[key].items()}
3241
clients_data[key] = value
3243
value["client_structure"] = [
3245
if isinstance(s, bytes)
3247
value["client_structure"]]
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
2570
3270
os.remove(stored_state_path)
2571
3271
except IOError as e:
2572
3272
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
2576
3276
logger.critical("Could not load persistent state:",
2579
3279
except EOFError as e:
2580
3280
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2583
3284
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
3285
for client_name, client in clients_data.items():
2585
3286
# Skip removed clients
2586
3287
if client_name not in client_settings:
2589
3290
# Decide which value to use after restoring saved state.
2590
3291
# We have three different values: Old config file,
2591
3292
# new config file, and saved state.
2649
3350
for client_name in (set(client_settings)
2650
3351
- set(old_client_settings)):
2651
3352
clients_data[client_name] = client_settings[client_name]
2653
3354
# Create all client objects
2654
for client_name, client in clients_data.iteritems():
3355
for client_name, client in clients_data.items():
2655
3356
tcp_server.clients[client_name] = client_class(
2656
name = client_name, settings = client,
2657
server_settings = server_settings)
3359
server_settings=server_settings)
2659
3361
if not tcp_server.clients:
2660
3362
logger.warning("No clients defined")
2662
3364
if not foreground:
2663
3365
if pidfile is not None:
2667
pidfile.write(str(pid) + "\n".encode("utf-8"))
3369
print(pid, file=pidfile)
2668
3370
except IOError:
2669
3371
logger.error("Could not write to file %r with PID %d",
2670
3372
pidfilename, pid)
2672
3374
del pidfilename
2674
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2675
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2680
class MandosDBusService(DBusObjectWithProperties):
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2681
3385
"""A D-Bus proxy object"""
2682
3387
def __init__(self):
2683
3388
dbus.service.Object.__init__(self, bus, "/")
2684
3390
_interface = "se.recompile.Mandos"
2686
@dbus_interface_annotations(_interface)
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2692
3392
@dbus.service.signal(_interface, signature="o")
2693
3393
def ClientAdded(self, objpath):
2697
3397
@dbus.service.signal(_interface, signature="ss")
2698
def ClientNotFound(self, fingerprint, address):
3398
def ClientNotFound(self, key_id, address):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2702
3404
@dbus.service.signal(_interface, signature="os")
2703
3405
def ClientRemoved(self, objpath, name):
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2707
3411
@dbus.service.method(_interface, out_signature="ao")
2708
3412
def GetAllClients(self):
2710
return dbus.Array(c.dbus_object_path
2712
tcp_server.clients.itervalues())
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2714
3419
@dbus.service.method(_interface,
2715
3420
out_signature="a{oa{sv}}")
2716
3421
def GetAllClientsWithProperties(self):
2718
3423
return dbus.Dictionary(
2719
((c.dbus_object_path, c.GetAll(""))
2720
for c in tcp_server.clients.itervalues()),
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2721
3427
signature="oa{sv}")
2723
3429
@dbus.service.method(_interface, in_signature="o")
2724
3430
def RemoveClient(self, object_path):
2726
for c in tcp_server.clients.itervalues():
3432
for c in tcp_server.clients.values():
2727
3433
if c.dbus_object_path == object_path:
2728
3434
del tcp_server.clients[c.name]
2729
3435
c.remove_from_connection()
2730
# Don't signal anything except ClientRemoved
3436
# Don't signal the disabling
2731
3437
c.disable(quiet=True)
2733
self.ClientRemoved(object_path, c.name)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2735
3441
raise KeyError(object_path)
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3452
{interface: client.GetAll(interface)
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3464
{interface: client.GetAll(interface)
3466
client._get_all_interface_names()}))
3468
self.ClientAdded(client.dbus_object_path)
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3478
self.ClientRemoved(client.dbus_object_path,
2739
3481
mandos_dbus_service = MandosDBusService()
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
2742
3489
"Cleanup function; run on exit"
2745
multiprocessing.active_children()
3493
mp.active_children()
2747
3495
if not (tcp_server.clients or client_settings):
2750
3498
# Store client before exiting. Secrets are encrypted with key
2751
3499
# based on what config file has. If config file is
2752
3500
# removed/edited, old secret will thus be unrecovable.
2754
3502
with PGPEngine() as pgp:
2755
for client in tcp_server.clients.itervalues():
3503
for client in tcp_server.clients.values():
2756
3504
key = client_settings[client.name]["secret"]
2757
3505
client.encrypted_secret = pgp.encrypt(client.secret,
2759
3507
client_dict = {}
2761
3509
# A list of attributes that can not be pickled
2763
exclude = set(("bus", "changedstate", "secret",
2764
"checker", "server_settings"))
2765
for name, typ in (inspect.getmembers
2766
(dbus.service.Object)):
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
2767
3515
exclude.add(name)
2769
3517
client_dict["encrypted_secret"] = (client
2770
3518
.encrypted_secret)
2771
3519
for attr in client.client_structure:
2772
3520
if attr not in exclude:
2773
3521
client_dict[attr] = getattr(client, attr)
2775
3523
clients[client.name] = client_dict
2776
3524
del client_settings[client.name]["secret"]
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2783
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
3527
with tempfile.NamedTemporaryFile(
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3535
tempname = stored_state.name
2785
3536
os.rename(tempname, stored_state_path)
2786
3537
except (IOError, OSError) as e: