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- Committer: Teddy Hogeborn
- Date: 2016-03-04 20:50:45 UTC
- Revision ID: teddy@recompile.se-20160304205045-jksfb2qzv9erkf21
Only use -fsanitize=... options if they work.
* Makefile (ALL_SANITIZE_OPTIONS): New.
(SANITIZE): Loop through all known sanitizing options and only use
those which do not give an error.
* Makefile (ALL_SANITIZE_OPTIONS): New.
(SANITIZE): Loop through all known sanitizing options and only use
those which do not give an error.
- files added:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
38
43
import socket
39
44
import argparse
40
45
import datetime
41
46
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
47
try:
48
import ConfigParser as configparser
49
except ImportError:
50
import configparser
49
51
import sys
50
52
import re
51
53
import os
60
62
import struct
61
63
import fcntl
62
64
import functools
63
import cPickle as pickle
65
try:
66
import cPickle as pickle
67
except ImportError:
68
import pickle
64
69
import multiprocessing
65
70
import types
71
import binascii
72
import tempfile
73
import itertools
74
import collections
75
import codecs
66
76
67
77
import dbus
68
78
import dbus.service
69
import gobject
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
70
83
import avahi
71
84
from dbus.mainloop.glib import DBusGMainLoop
72
85
import ctypes
82
95
except ImportError:
83
96
SO_BINDTODEVICE = None
84
97
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.3"
102
stored_state_file = "clients.pickle"
103
104
logger = logging.getLogger()
105
syslogger = None
106
107
try:
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
110
except (OSError, AttributeError):
111
112
def if_nametoindex(interface):
113
"Get an interface index the hard way, i.e. using fcntl()"
114
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
115
with contextlib.closing(socket.socket()) as s:
116
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
119
return interface_index
120
121
122
def initlogger(debug, level=logging.WARNING):
123
"""init logger and add loglevel"""
124
125
global syslogger
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
129
syslogger.setFormatter(logging.Formatter
130
('Mandos [%(process)d]: %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(syslogger)
133
134
if debug:
135
console = logging.StreamHandler()
136
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
137
' [%(process)d]:'
138
' %(levelname)s:'
139
' %(message)s'))
140
logger.addHandler(console)
141
logger.setLevel(level)
142
143
144
class PGPError(Exception):
145
"""Exception if encryption/decryption fails"""
146
pass
147
148
149
class PGPEngine(object):
150
"""A simple class for OpenPGP symmetric encryption & decryption"""
151
152
def __init__(self):
153
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
154
self.gpg = "gpg"
155
try:
156
output = subprocess.check_output(["gpgconf"])
157
for line in output.splitlines():
158
name, text, path = line.split(":")
159
if name == "gpg":
160
self.gpg = path
161
break
162
except OSError as e:
163
if e.errno != errno.ENOENT:
164
raise
165
self.gnupgargs = ['--batch',
166
'--homedir', self.tempdir,
167
'--force-mdc',
168
'--quiet',
169
'--no-use-agent']
170
171
def __enter__(self):
172
return self
173
174
def __exit__(self, exc_type, exc_value, traceback):
175
self._cleanup()
176
return False
177
178
def __del__(self):
179
self._cleanup()
180
181
def _cleanup(self):
182
if self.tempdir is not None:
183
# Delete contents of tempdir
184
for root, dirs, files in os.walk(self.tempdir,
185
topdown = False):
186
for filename in files:
187
os.remove(os.path.join(root, filename))
188
for dirname in dirs:
189
os.rmdir(os.path.join(root, dirname))
190
# Remove tempdir
191
os.rmdir(self.tempdir)
192
self.tempdir = None
193
194
def password_encode(self, password):
195
# Passphrase can not be empty and can not contain newlines or
196
# NUL bytes. So we prefix it and hex encode it.
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
203
return encoded
204
205
def encrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen([self.gpg, '--symmetric',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return ciphertext
222
223
def decrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
228
passfile.flush()
229
proc = subprocess.Popen([self.gpg, '--decrypt',
230
'--passphrase-file',
231
passfile.name]
232
+ self.gnupgargs,
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
238
raise PGPError(err)
239
return decrypted_plaintext
240
103
241
104
242
class AvahiError(Exception):
105
243
def __init__(self, value, *args, **kwargs):
106
244
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
110
248
111
249
class AvahiServiceError(AvahiError):
112
250
pass
113
251
252
114
253
class AvahiGroupError(AvahiError):
115
254
pass
116
255
123
262
Used to optionally bind to the specified interface.
124
263
name: string; Example: 'Mandos'
125
264
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
265
See <https://www.iana.org/assignments/service-names-port-numbers>
127
266
port: integer; what port to announce
128
267
TXT: list of strings; TXT record for the service
129
268
domain: string; Domain to publish on, default to .local if empty.
135
274
server: D-Bus Server
136
275
bus: dbus.SystemBus()
137
276
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
277
278
def __init__(self,
279
interface = avahi.IF_UNSPEC,
280
name = None,
281
servicetype = None,
282
port = None,
283
TXT = None,
284
domain = "",
285
host = "",
286
max_renames = 32768,
287
protocol = avahi.PROTO_UNSPEC,
288
bus = None):
142
289
self.interface = interface
143
290
self.name = name
144
291
self.type = servicetype
153
300
self.server = None
154
301
self.bus = bus
155
302
self.entry_group_state_changed_match = None
156
def rename(self):
303
304
def rename(self, remove=True):
157
305
"""Derived from the Avahi example code"""
158
306
if self.rename_count >= self.max_renames:
159
307
logger.critical("No suitable Zeroconf service name found"
160
308
" after %i retries, exiting.",
161
309
self.rename_count)
162
310
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
313
self.rename_count += 1
164
314
logger.info("Changing Zeroconf service name to %r ...",
165
315
self.name)
166
syslogger.setFormatter(logging.Formatter
167
('Mandos (%s) [%%(process)d]:'
168
' %%(levelname)s: %%(message)s'
169
% self.name))
170
self.remove()
316
if remove:
317
self.remove()
171
318
try:
172
319
self.add()
173
320
except dbus.exceptions.DBusException as error:
174
logger.critical("DBusException: %s", error)
175
self.cleanup()
176
os._exit(1)
177
self.rename_count += 1
321
if (error.get_dbus_name()
322
== "org.freedesktop.Avahi.CollisionError"):
323
logger.info("Local Zeroconf service name collision.")
324
return self.rename(remove=False)
325
else:
326
logger.critical("D-Bus Exception", exc_info=error)
327
self.cleanup()
328
os._exit(1)
329
178
330
def remove(self):
179
331
"""Derived from the Avahi example code"""
180
332
if self.entry_group_state_changed_match is not None:
182
334
self.entry_group_state_changed_match = None
183
335
if self.group is not None:
184
336
self.group.Reset()
337
185
338
def add(self):
186
339
"""Derived from the Avahi example code"""
187
340
self.remove()
192
345
avahi.DBUS_INTERFACE_ENTRY_GROUP)
193
346
self.entry_group_state_changed_match = (
194
347
self.group.connect_to_signal(
195
'StateChanged', self .entry_group_state_changed))
348
'StateChanged', self.entry_group_state_changed))
196
349
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
197
350
self.name, self.type)
198
351
self.group.AddService(
204
357
dbus.UInt16(self.port),
205
358
avahi.string_array_to_txt_array(self.TXT))
206
359
self.group.Commit()
360
207
361
def entry_group_state_changed(self, state, error):
208
362
"""Derived from the Avahi example code"""
209
363
logger.debug("Avahi entry group state change: %i", state)
215
369
self.rename()
216
370
elif state == avahi.ENTRY_GROUP_FAILURE:
217
371
logger.critical("Avahi: Error in group state changed %s",
218
unicode(error))
219
raise AvahiGroupError("State changed: %s"
220
% unicode(error))
372
str(error))
373
raise AvahiGroupError("State changed: {!s}".format(error))
374
221
375
def cleanup(self):
222
376
"""Derived from the Avahi example code"""
223
377
if self.group is not None:
224
378
try:
225
379
self.group.Free()
226
380
except (dbus.exceptions.UnknownMethodException,
227
dbus.exceptions.DBusException) as e:
381
dbus.exceptions.DBusException):
228
382
pass
229
383
self.group = None
230
384
self.remove()
385
231
386
def server_state_changed(self, state, error=None):
232
387
"""Derived from the Avahi example code"""
233
388
logger.debug("Avahi server state change: %i", state)
234
bad_states = { avahi.SERVER_INVALID:
235
"Zeroconf server invalid",
236
avahi.SERVER_REGISTERING: None,
237
avahi.SERVER_COLLISION:
238
"Zeroconf server name collision",
239
avahi.SERVER_FAILURE:
240
"Zeroconf server failure" }
389
bad_states = {
390
avahi.SERVER_INVALID: "Zeroconf server invalid",
391
avahi.SERVER_REGISTERING: None,
392
avahi.SERVER_COLLISION: "Zeroconf server name collision",
393
avahi.SERVER_FAILURE: "Zeroconf server failure",
394
}
241
395
if state in bad_states:
242
396
if bad_states[state] is not None:
243
397
if error is None:
246
400
logger.error(bad_states[state] + ": %r", error)
247
401
self.cleanup()
248
402
elif state == avahi.SERVER_RUNNING:
249
self.add()
403
try:
404
self.add()
405
except dbus.exceptions.DBusException as error:
406
if (error.get_dbus_name()
407
== "org.freedesktop.Avahi.CollisionError"):
408
logger.info("Local Zeroconf service name"
409
" collision.")
410
return self.rename(remove=False)
411
else:
412
logger.critical("D-Bus Exception", exc_info=error)
413
self.cleanup()
414
os._exit(1)
250
415
else:
251
416
if error is None:
252
417
logger.debug("Unknown state: %r", state)
253
418
else:
254
419
logger.debug("Unknown state: %r: %r", state, error)
420
255
421
def activate(self):
256
422
"""Derived from the Avahi example code"""
257
423
if self.server is None:
261
427
follow_name_owner_changes=True),
262
428
avahi.DBUS_INTERFACE_SERVER)
263
429
self.server.connect_to_signal("StateChanged",
264
self.server_state_changed)
430
self.server_state_changed)
265
431
self.server_state_changed(self.server.GetState())
266
432
267
433
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
434
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
436
"""Add the new name to the syslog messages"""
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
440
.format(self.name)))
441
return ret
442
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
447
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
451
def __init__(self):
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
454
# happens.
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
458
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
461
462
# Constants
463
E_SUCCESS = 0
464
E_INTERRUPTED = -52
465
E_AGAIN = -28
466
CRT_OPENPGP = 2
467
CLIENT = 2
468
SHUT_RDWR = 0
469
CRD_CERTIFICATE = 1
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
472
473
# Types
474
class session_int(ctypes.Structure):
475
_fields_ = []
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
478
_fields_ = []
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
486
_fields_ = []
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int #
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
493
494
# Exceptions
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
503
# gnutls.strerror()
504
self.code = code
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
508
message, *args)
509
510
class CertificateSecurityError(Error):
511
pass
512
513
# Classes
514
class Credentials(object):
515
def __init__(self):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
520
521
def __del__(self):
522
gnutls.certificate_free_credentials(self._c_object)
523
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
531
True)
532
self.socket = socket
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
537
ctypes.c_void_p))
538
self.credentials = credentials
539
540
def __del__(self):
541
gnutls.deinit(self._c_object)
542
543
def handshake(self):
544
return gnutls.handshake(self._c_object)
545
546
def send(self, data):
547
data = bytes(data)
548
data_len = len(data)
549
while data_len > 0:
550
data_len -= gnutls.record_send(self._c_object,
551
data[-data_len:],
552
data_len)
553
554
def bye(self):
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
556
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
561
if result >= 0:
562
return result
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
566
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
570
while result < 0:
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
574
return result
575
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
578
579
# Functions
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
584
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
588
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
592
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
595
ctypes.c_size_t]
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
598
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
604
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
609
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
613
ctypes.c_int]
614
handshake_set_private_extensions.restype = None
615
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
618
ctypes.c_void_p]
619
credentials_set.restype = _error_code
620
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
624
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
628
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
633
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
637
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
641
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
645
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
650
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
654
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
659
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
663
664
# All the function declarations below are from gnutls/openpgp.h
665
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
669
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
673
openpgp_crt_fmt_t]
674
openpgp_crt_import.restype = _error_code
675
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
680
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
684
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
688
ctypes.c_void_p,
689
ctypes.POINTER(
690
ctypes.c_size_t)]
691
openpgp_crt_get_fingerprint.restype = _error_code
692
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
696
gnutls = GnuTLS()
697
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
701
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
704
"""
705
connection.send(func(*args, **kwargs))
706
connection.close()
707
274
708
class Client(object):
275
709
"""A representation of a client host served by this server.
276
710
277
711
Attributes:
278
_approved: bool(); 'None' if not yet approved/disapproved
712
approved: bool(); 'None' if not yet approved/disapproved
279
713
approval_delay: datetime.timedelta(); Time to wait for approval
280
714
approval_duration: datetime.timedelta(); Duration of one approval
281
715
checker: subprocess.Popen(); a running checker process used
288
722
instance %(name)s can be used in the command.
289
723
checker_initiator_tag: a gobject event source tag, or None
290
724
created: datetime.datetime(); (UTC) object creation
725
client_structure: Object describing what attributes a client has
726
and is used for storing the client at exit
291
727
current_checker_command: string; current running checker_command
292
disable_hook: If set, called by disable() as disable_hook(self)
293
728
disable_initiator_tag: a gobject event source tag, or None
294
729
enabled: bool()
295
730
fingerprint: string (40 or 32 hexadecimal digits); used to
298
733
interval: datetime.timedelta(); How often to start a new checker
299
734
last_approval_request: datetime.datetime(); (UTC) or None
300
735
last_checked_ok: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
736
last_checker_status: integer between 0 and 255 reflecting exit
737
status of last checker. -1 reflects crashed
738
checker, -2 means no checker completed yet.
739
last_checker_signal: The signal which killed the last checker, if
740
last_checker_status is -1
741
last_enabled: datetime.datetime(); (UTC) or None
302
742
name: string; from the config file, used in log messages and
303
743
D-Bus identifiers
304
744
secret: bytestring; sent verbatim (over TLS) to client
305
745
timeout: datetime.timedelta(); How long from last_checked_ok
306
746
until this client is disabled
307
extended_timeout: extra long timeout when password has been sent
747
extended_timeout: extra long timeout when secret has been sent
308
748
runtime_expansions: Allowed attributes for runtime expansion.
309
749
expires: datetime.datetime(); time (UTC) when a client will be
310
750
disabled, or None
751
server_settings: The server_settings dict from main()
311
752
"""
312
753
313
754
runtime_expansions = ("approval_delay", "approval_duration",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
316
758
"last_enabled", "name", "timeout")
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
336
attribute."""
759
client_defaults = {
760
"timeout": "PT5M",
761
"extended_timeout": "PT15M",
762
"interval": "PT2M",
763
"checker": "fping -q -- %%(host)s",
764
"host": "",
765
"approval_delay": "PT0S",
766
"approval_duration": "PT1S",
767
"approved_by_default": "True",
768
"enabled": "True",
769
}
770
771
@staticmethod
772
def config_parser(config):
773
"""Construct a new dict of client settings of this form:
774
{ client_name: {setting_name: value, ...}, ...}
775
with exceptions for any special settings as defined above.
776
NOTE: Must be a pure function. Must return the same result
777
value given the same arguments.
778
"""
779
settings = {}
780
for client_name in config.sections():
781
section = dict(config.items(client_name))
782
client = settings[client_name] = {}
783
784
client["host"] = section["host"]
785
# Reformat values from string types to Python types
786
client["approved_by_default"] = config.getboolean(
787
client_name, "approved_by_default")
788
client["enabled"] = config.getboolean(client_name,
789
"enabled")
790
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
794
client["fingerprint"] = (section["fingerprint"].upper()
795
.replace(" ", ""))
796
if "secret" in section:
797
client["secret"] = section["secret"].decode("base64")
798
elif "secfile" in section:
799
with open(os.path.expanduser(os.path.expandvars
800
(section["secfile"])),
801
"rb") as secfile:
802
client["secret"] = secfile.read()
803
else:
804
raise TypeError("No secret or secfile for section {}"
805
.format(section))
806
client["timeout"] = string_to_delta(section["timeout"])
807
client["extended_timeout"] = string_to_delta(
808
section["extended_timeout"])
809
client["interval"] = string_to_delta(section["interval"])
810
client["approval_delay"] = string_to_delta(
811
section["approval_delay"])
812
client["approval_duration"] = string_to_delta(
813
section["approval_duration"])
814
client["checker_command"] = section["checker"]
815
client["last_approval_request"] = None
816
client["last_checked_ok"] = None
817
client["last_checker_status"] = -2
818
819
return settings
820
821
def __init__(self, settings, name = None, server_settings=None):
337
822
self.name = name
338
if config is None:
339
config = {}
823
if server_settings is None:
824
server_settings = {}
825
self.server_settings = server_settings
826
# adding all client settings
827
for setting, value in settings.items():
828
setattr(self, setting, value)
829
830
if self.enabled:
831
if not hasattr(self, "last_enabled"):
832
self.last_enabled = datetime.datetime.utcnow()
833
if not hasattr(self, "expires"):
834
self.expires = (datetime.datetime.utcnow()
835
+ self.timeout)
836
else:
837
self.last_enabled = None
838
self.expires = None
839
340
840
logger.debug("Creating client %r", self.name)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
343
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
346
841
logger.debug(" Fingerprint: %s", self.fingerprint)
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
354
else:
355
raise TypeError("No secret or secfile for client %s"
356
% self.name)
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
842
self.created = settings.get("created",
843
datetime.datetime.utcnow())
844
845
# attributes specific for this server instance
367
846
self.checker = None
368
847
self.checker_initiator_tag = None
369
848
self.disable_initiator_tag = None
370
self.expires = None
371
849
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
850
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
851
self.approved = None
378
852
self.approvals_pending = 0
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
857
if not attr.startswith("_")]
858
self.client_structure.append("client_structure")
859
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
862
if not name.startswith("_"):
863
self.client_structure.append(name)
384
864
865
# Send notice to process children that client state has changed
385
866
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
867
with self.changedstate:
868
self.changedstate.notify_all()
869
390
870
def enable(self):
391
871
"""Start this client's checker and timeout hooks"""
392
872
if getattr(self, "enabled", False):
393
873
# Already enabled
394
874
return
395
self.send_changedstate()
396
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
400
self.start_checker))
401
# Schedule a disable() when 'timeout' has passed
402
875
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
405
self.disable))
406
876
self.enabled = True
407
877
self.last_enabled = datetime.datetime.utcnow()
408
# Also start a new checker *right now*.
409
self.start_checker()
878
self.init_checker()
879
self.send_changedstate()
410
880
411
881
def disable(self, quiet=True):
412
882
"""Disable this client."""
413
883
if not getattr(self, "enabled", False):
414
884
return False
415
885
if not quiet:
416
self.send_changedstate()
417
if not quiet:
418
886
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
887
if getattr(self, "disable_initiator_tag", None) is not None:
420
888
gobject.source_remove(self.disable_initiator_tag)
421
889
self.disable_initiator_tag = None
422
890
self.expires = None
423
if getattr(self, "checker_initiator_tag", False):
891
if getattr(self, "checker_initiator_tag", None) is not None:
424
892
gobject.source_remove(self.checker_initiator_tag)
425
893
self.checker_initiator_tag = None
426
894
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
429
895
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
430
898
# Do not run this again if called by a gobject.timeout_add
431
899
return False
432
900
433
901
def __del__(self):
434
self.disable_hook = None
435
902
self.disable()
436
903
437
def checker_callback(self, pid, condition, command):
904
def init_checker(self):
905
# Schedule a new checker to be started an 'interval' from now,
906
# and every interval from then on.
907
if self.checker_initiator_tag is not None:
908
gobject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = gobject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
911
self.start_checker)
912
# Schedule a disable() when 'timeout' has passed
913
if self.disable_initiator_tag is not None:
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = gobject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
917
# Also start a new checker *right now*.
918
self.start_checker()
919
920
def checker_callback(self, source, condition, connection,
921
command):
438
922
"""The checker has completed, so take appropriate actions."""
439
923
self.checker_callback_tag = None
440
924
self.checker = None
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
927
connection.close()
928
929
if returncode >= 0:
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
932
if self.last_checker_status == 0:
444
933
logger.info("Checker for %(name)s succeeded",
445
934
vars(self))
446
935
self.checked_ok()
447
936
else:
448
logger.info("Checker for %(name)s failed",
449
vars(self))
937
logger.info("Checker for %(name)s failed", vars(self))
450
938
else:
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
451
941
logger.warning("Checker for %(name)s crashed?",
452
942
vars(self))
453
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
943
return False
944
945
def checked_ok(self):
946
"""Assert that the client has been seen, alive and well."""
947
self.last_checked_ok = datetime.datetime.utcnow()
948
self.last_checker_status = 0
949
self.last_checker_signal = None
950
self.bump_timeout()
951
952
def bump_timeout(self, timeout=None):
953
"""Bump up the timeout for this client."""
460
954
if timeout is None:
461
955
timeout = self.timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
467
self.disable))
956
if self.disable_initiator_tag is not None:
957
gobject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
959
if getattr(self, "enabled", False):
960
self.disable_initiator_tag = gobject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
962
self.expires = datetime.datetime.utcnow() + timeout
468
963
469
964
def need_approval(self):
470
965
self.last_approval_request = datetime.datetime.utcnow()
475
970
If a checker already exists, leave it running and do
476
971
nothing."""
477
972
# The reason for not killing a running checker is that if we
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
973
# did that, and if a checker (for some reason) started running
974
# slowly and taking more than 'interval' time, then the client
975
# would inevitably timeout, since no checker would get a
976
# chance to run to completion. If we instead leave running
482
977
# checkers alone, the checker would have to take more time
483
978
# than 'timeout' for the client to be disabled, which is as it
484
979
# should be.
485
980
486
# If a checker exists, make sure it is not a zombie
487
try:
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
493
else:
494
if pid:
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
981
if self.checker is not None and not self.checker.is_alive():
982
logger.warning("Checker was not alive; joining")
983
self.checker.join()
984
self.checker = None
499
985
# Start a new checker if needed
500
986
if self.checker is None:
987
# Escape attributes for the shell
988
escaped_attrs = {
989
attr: re.escape(str(getattr(self, attr)))
990
for attr in self.runtime_expansions }
501
991
try:
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
504
except TypeError:
505
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
514
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
992
command = self.checker_command % escaped_attrs
993
except TypeError as error:
994
logger.error('Could not format string "%s"',
995
self.checker_command,
996
exc_info=error)
997
return True # Try again later
520
998
self.current_checker_command = command
521
try:
522
logger.info("Starting checker %r for %s",
523
command, self.name)
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
529
close_fds=True,
530
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
543
error)
999
logger.info("Starting checker %r for %s", command,
1000
self.name)
1001
# We don't need to redirect stdout and stderr, since
1002
# in normal mode, that is already done by daemon(),
1003
# and in debug mode we don't want to. (Stdin is
1004
# always replaced by /dev/null.)
1005
# The exception is when not debugging but nevertheless
1006
# running in the foreground; use the previously
1007
# created wnull.
1008
popen_args = { "close_fds": True,
1009
"shell": True,
1010
"cwd": "/" }
1011
if (not self.server_settings["debug"]
1012
and self.server_settings["foreground"]):
1013
popen_args.update({"stdout": wnull,
1014
"stderr": wnull })
1015
pipe = multiprocessing.Pipe(duplex = False)
1016
self.checker = multiprocessing.Process(
1017
target = call_pipe,
1018
args = (pipe[1], subprocess.call, command),
1019
kwargs = popen_args)
1020
self.checker.start()
1021
self.checker_callback_tag = gobject.io_add_watch(
1022
pipe[0].fileno(), gobject.IO_IN,
1023
self.checker_callback, pipe[0], command)
544
1024
# Re-run this periodically if run by gobject.timeout_add
545
1025
return True
546
1026
552
1032
if getattr(self, "checker", None) is None:
553
1033
return
554
1034
logger.debug("Stopping checker for %(name)s", vars(self))
555
try:
556
os.kill(self.checker.pid, signal.SIGTERM)
557
#time.sleep(0.5)
558
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
562
raise
1035
self.checker.terminate()
563
1036
self.checker = None
564
1037
565
1038
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
568
1043
"""Decorators for marking methods of a DBusObjectWithProperties to
569
1044
become properties on the D-Bus.
570
1045
579
1054
# "Set" method, so we fail early here:
580
1055
if byte_arrays and signature != "ay":
581
1056
raise ValueError("Byte arrays not supported for non-'ay'"
582
" signature %r" % signature)
1057
" signature {!r}".format(signature))
1058
583
1059
def decorator(func):
584
1060
func._dbus_is_property = True
585
1061
func._dbus_interface = dbus_interface
590
1066
func._dbus_name = func._dbus_name[:-14]
591
1067
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
592
1068
return func
1069
1070
return decorator
1071
1072
1073
def dbus_interface_annotations(dbus_interface):
1074
"""Decorator for marking functions returning interface annotations
1075
1076
Usage:
1077
1078
@dbus_interface_annotations("org.example.Interface")
1079
def _foo(self): # Function name does not matter
1080
return {"org.freedesktop.DBus.Deprecated": "true",
1081
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1082
"false"}
1083
"""
1084
1085
def decorator(func):
1086
func._dbus_is_interface = True
1087
func._dbus_interface = dbus_interface
1088
func._dbus_name = dbus_interface
1089
return func
1090
1091
return decorator
1092
1093
1094
def dbus_annotations(annotations):
1095
"""Decorator to annotate D-Bus methods, signals or properties
1096
Usage:
1097
1098
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1099
"org.freedesktop.DBus.Property."
1100
"EmitsChangedSignal": "false"})
1101
@dbus_service_property("org.example.Interface", signature="b",
1102
access="r")
1103
def Property_dbus_property(self):
1104
return dbus.Boolean(False)
1105
1106
See also the DBusObjectWithAnnotations class.
1107
"""
1108
1109
def decorator(func):
1110
func._dbus_annotations = annotations
1111
return func
1112
593
1113
return decorator
594
1114
595
1115
596
1116
class DBusPropertyException(dbus.exceptions.DBusException):
597
1117
"""A base class for D-Bus property-related exceptions
598
1118
"""
599
def __unicode__(self):
600
return unicode(str(self))
1119
pass
601
1120
602
1121
603
1122
class DBusPropertyAccessException(DBusPropertyException):
612
1131
pass
613
1132
614
1133
615
class DBusObjectWithProperties(dbus.service.Object):
1134
class DBusObjectWithAnnotations(dbus.service.Object):
1135
"""A D-Bus object with annotations.
1136
1137
Classes inheriting from this can use the dbus_annotations
1138
decorator to add annotations to methods or signals.
1139
"""
1140
1141
@staticmethod
1142
def _is_dbus_thing(thing):
1143
"""Returns a function testing if an attribute is a D-Bus thing
1144
1145
If called like _is_dbus_thing("method") it returns a function
1146
suitable for use as predicate to inspect.getmembers().
1147
"""
1148
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1149
False)
1150
1151
def _get_all_dbus_things(self, thing):
1152
"""Returns a generator of (name, attribute) pairs
1153
"""
1154
return ((getattr(athing.__get__(self), "_dbus_name", name),
1155
athing.__get__(self))
1156
for cls in self.__class__.__mro__
1157
for name, athing in
1158
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1159
1160
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1161
out_signature = "s",
1162
path_keyword = 'object_path',
1163
connection_keyword = 'connection')
1164
def Introspect(self, object_path, connection):
1165
"""Overloading of standard D-Bus method.
1166
1167
Inserts annotation tags on methods and signals.
1168
"""
1169
xmlstring = dbus.service.Object.Introspect(self, object_path,
1170
connection)
1171
try:
1172
document = xml.dom.minidom.parseString(xmlstring)
1173
1174
for if_tag in document.getElementsByTagName("interface"):
1175
# Add annotation tags
1176
for typ in ("method", "signal"):
1177
for tag in if_tag.getElementsByTagName(typ):
1178
annots = dict()
1179
for name, prop in (self.
1180
_get_all_dbus_things(typ)):
1181
if (name == tag.getAttribute("name")
1182
and prop._dbus_interface
1183
== if_tag.getAttribute("name")):
1184
annots.update(getattr(
1185
prop, "_dbus_annotations", {}))
1186
for name, value in annots.items():
1187
ann_tag = document.createElement(
1188
"annotation")
1189
ann_tag.setAttribute("name", name)
1190
ann_tag.setAttribute("value", value)
1191
tag.appendChild(ann_tag)
1192
# Add interface annotation tags
1193
for annotation, value in dict(
1194
itertools.chain.from_iterable(
1195
annotations().items()
1196
for name, annotations
1197
in self._get_all_dbus_things("interface")
1198
if name == if_tag.getAttribute("name")
1199
)).items():
1200
ann_tag = document.createElement("annotation")
1201
ann_tag.setAttribute("name", annotation)
1202
ann_tag.setAttribute("value", value)
1203
if_tag.appendChild(ann_tag)
1204
# Fix argument name for the Introspect method itself
1205
if (if_tag.getAttribute("name")
1206
== dbus.INTROSPECTABLE_IFACE):
1207
for cn in if_tag.getElementsByTagName("method"):
1208
if cn.getAttribute("name") == "Introspect":
1209
for arg in cn.getElementsByTagName("arg"):
1210
if (arg.getAttribute("direction")
1211
== "out"):
1212
arg.setAttribute("name",
1213
"xml_data")
1214
xmlstring = document.toxml("utf-8")
1215
document.unlink()
1216
except (AttributeError, xml.dom.DOMException,
1217
xml.parsers.expat.ExpatError) as error:
1218
logger.error("Failed to override Introspection method",
1219
exc_info=error)
1220
return xmlstring
1221
1222
1223
class DBusObjectWithProperties(DBusObjectWithAnnotations):
616
1224
"""A D-Bus object with properties.
617
1225
618
1226
Classes inheriting from this can use the dbus_service_property
620
1228
standard Get(), Set(), and GetAll() methods on the D-Bus.
621
1229
"""
622
1230
623
@staticmethod
624
def _is_dbus_property(obj):
625
return getattr(obj, "_dbus_is_property", False)
626
627
def _get_all_dbus_properties(self):
628
"""Returns a generator of (name, attribute) pairs
629
"""
630
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
631
for cls in self.__class__.__mro__
632
for name, prop in inspect.getmembers(cls, self._is_dbus_property))
633
634
1231
def _get_dbus_property(self, interface_name, property_name):
635
1232
"""Returns a bound method if one exists which is a D-Bus
636
1233
property with the specified name and interface.
637
1234
"""
638
for cls in self.__class__.__mro__:
639
for name, value in inspect.getmembers(cls, self._is_dbus_property):
640
if value._dbus_name == property_name and value._dbus_interface == interface_name:
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
1238
if (value._dbus_name == property_name
1239
and value._dbus_interface == interface_name):
641
1240
return value.__get__(self)
642
1241
643
1242
# No such property
644
raise DBusPropertyNotFound(self.dbus_object_path + ":"
645
+ interface_name + "."
646
+ property_name)
647
648
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1243
raise DBusPropertyNotFound("{}:{}.{}".format(
1244
self.dbus_object_path, interface_name, property_name))
1245
1246
@classmethod
1247
def _get_all_interface_names(cls):
1248
"""Get a sequence of all interfaces supported by an object"""
1249
return (name for name in set(getattr(getattr(x, attr),
1250
"_dbus_interface", None)
1251
for x in (inspect.getmro(cls))
1252
for attr in dir(x))
1253
if name is not None)
1254
1255
@dbus.service.method(dbus.PROPERTIES_IFACE,
1256
in_signature="ss",
649
1257
out_signature="v")
650
1258
def Get(self, interface_name, property_name):
651
1259
"""Standard D-Bus property Get() method, see D-Bus standard.
669
1277
# The byte_arrays option is not supported yet on
670
1278
# signatures other than "ay".
671
1279
if prop._dbus_signature != "ay":
672
raise ValueError
673
value = dbus.ByteArray(''.join(unichr(byte)
674
for byte in value))
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
1283
value = dbus.ByteArray(b''.join(chr(byte)
1284
for byte in value))
675
1285
prop(value)
676
1286
677
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1288
in_signature="s",
678
1289
out_signature="a{sv}")
679
1290
def GetAll(self, interface_name):
680
1291
"""Standard D-Bus property GetAll() method, see D-Bus
682
1293
683
1294
Note: Will not include properties with access="write".
684
1295
"""
685
all = {}
686
for name, prop in self._get_all_dbus_properties():
1296
properties = {}
1297
for name, prop in self._get_all_dbus_things("property"):
687
1298
if (interface_name
688
1299
and interface_name != prop._dbus_interface):
689
1300
# Interface non-empty but did not match
693
1304
continue
694
1305
value = prop()
695
1306
if not hasattr(value, "variant_level"):
696
all[name] = value
1307
properties[name] = value
697
1308
continue
698
all[name] = type(value)(value, variant_level=
699
value.variant_level+1)
700
return dbus.Dictionary(all, signature="sv")
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
1311
return dbus.Dictionary(properties, signature="sv")
1312
1313
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1314
def PropertiesChanged(self, interface_name, changed_properties,
1315
invalidated_properties):
1316
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1317
standard.
1318
"""
1319
pass
701
1320
702
1321
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
703
1322
out_signature="s",
704
1323
path_keyword='object_path',
705
1324
connection_keyword='connection')
706
1325
def Introspect(self, object_path, connection):
707
"""Standard D-Bus method, overloaded to insert property tags.
1326
"""Overloading of standard D-Bus method.
1327
1328
Inserts property tags and interface annotation tags.
708
1329
"""
709
xmlstring = dbus.service.Object.Introspect(self, object_path,
710
connection)
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1331
object_path,
1332
connection)
711
1333
try:
712
1334
document = xml.dom.minidom.parseString(xmlstring)
1335
713
1336
def make_tag(document, name, prop):
714
1337
e = document.createElement("property")
715
1338
e.setAttribute("name", name)
716
1339
e.setAttribute("type", prop._dbus_signature)
717
1340
e.setAttribute("access", prop._dbus_access)
718
1341
return e
1342
719
1343
for if_tag in document.getElementsByTagName("interface"):
1344
# Add property tags
720
1345
for tag in (make_tag(document, name, prop)
721
1346
for name, prop
722
in self._get_all_dbus_properties()
1347
in self._get_all_dbus_things("property")
723
1348
if prop._dbus_interface
724
1349
== if_tag.getAttribute("name")):
725
1350
if_tag.appendChild(tag)
1351
# Add annotation tags for properties
1352
for tag in if_tag.getElementsByTagName("property"):
1353
annots = dict()
1354
for name, prop in self._get_all_dbus_things(
1355
"property"):
1356
if (name == tag.getAttribute("name")
1357
and prop._dbus_interface
1358
== if_tag.getAttribute("name")):
1359
annots.update(getattr(
1360
prop, "_dbus_annotations", {}))
1361
for name, value in annots.items():
1362
ann_tag = document.createElement(
1363
"annotation")
1364
ann_tag.setAttribute("name", name)
1365
ann_tag.setAttribute("value", value)
1366
tag.appendChild(ann_tag)
726
1367
# Add the names to the return values for the
727
1368
# "org.freedesktop.DBus.Properties" methods
728
1369
if (if_tag.getAttribute("name")
743
1384
except (AttributeError, xml.dom.DOMException,
744
1385
xml.parsers.expat.ExpatError) as error:
745
1386
logger.error("Failed to override Introspection method",
746
error)
747
return xmlstring
748
749
750
def datetime_to_dbus (dt, variant_level=0):
1387
exc_info=error)
1388
return xmlstring
1389
1390
try:
1391
dbus.OBJECT_MANAGER_IFACE
1392
except AttributeError:
1393
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1394
1395
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
"""A D-Bus object with an ObjectManager.
1397
1398
Classes inheriting from this exposes the standard
1399
GetManagedObjects call and the InterfacesAdded and
1400
InterfacesRemoved signals on the standard
1401
"org.freedesktop.DBus.ObjectManager" interface.
1402
1403
Note: No signals are sent automatically; they must be sent
1404
manually.
1405
"""
1406
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1408
def GetManagedObjects(self):
1409
"""This function must be overridden"""
1410
raise NotImplementedError()
1411
1412
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1414
def InterfacesAdded(self, object_path, interfaces_and_properties):
1415
pass
1416
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1418
def InterfacesRemoved(self, object_path, interfaces):
1419
pass
1420
1421
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1425
def Introspect(self, object_path, connection):
1426
"""Overloading of standard D-Bus method.
1427
1428
Override return argument name of GetManagedObjects to be
1429
"objpath_interfaces_and_properties"
1430
"""
1431
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1432
object_path,
1433
connection)
1434
try:
1435
document = xml.dom.minidom.parseString(xmlstring)
1436
1437
for if_tag in document.getElementsByTagName("interface"):
1438
# Fix argument name for the GetManagedObjects method
1439
if (if_tag.getAttribute("name")
1440
== dbus.OBJECT_MANAGER_IFACE):
1441
for cn in if_tag.getElementsByTagName("method"):
1442
if (cn.getAttribute("name")
1443
== "GetManagedObjects"):
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1446
== "out"):
1447
arg.setAttribute(
1448
"name",
1449
"objpath_interfaces"
1450
"_and_properties")
1451
xmlstring = document.toxml("utf-8")
1452
document.unlink()
1453
except (AttributeError, xml.dom.DOMException,
1454
xml.parsers.expat.ExpatError) as error:
1455
logger.error("Failed to override Introspection method",
1456
exc_info = error)
1457
return xmlstring
1458
1459
def datetime_to_dbus(dt, variant_level=0):
751
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
752
1461
if dt is None:
753
1462
return dbus.String("", variant_level = variant_level)
754
return dbus.String(dt.isoformat(),
755
variant_level=variant_level)
756
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
1463
return dbus.String(dt.isoformat(), variant_level=variant_level)
1464
1465
1466
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1467
"""A class decorator; applied to a subclass of
1468
dbus.service.Object, it will add alternate D-Bus attributes with
1469
interface names according to the "alt_interface_names" mapping.
1470
Usage:
1471
1472
@alternate_dbus_interfaces({"org.example.Interface":
1473
"net.example.AlternateInterface"})
1474
class SampleDBusObject(dbus.service.Object):
1475
@dbus.service.method("org.example.Interface")
1476
def SampleDBusMethod():
1477
pass
1478
1479
The above "SampleDBusMethod" on "SampleDBusObject" will be
1480
reachable via two interfaces: "org.example.Interface" and
1481
"net.example.AlternateInterface", the latter of which will have
1482
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1483
"true", unless "deprecate" is passed with a False value.
1484
1485
This works for methods and signals, and also for D-Bus properties
1486
(from DBusObjectWithProperties) and interfaces (from the
1487
dbus_interface_annotations decorator).
760
1488
"""
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1489
1490
def wrapper(cls):
1491
for orig_interface_name, alt_interface_name in (
1492
alt_interface_names.items()):
1493
attr = {}
1494
interface_names = set()
1495
# Go though all attributes of the class
1496
for attrname, attribute in inspect.getmembers(cls):
768
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
769
1498
# with the wrong interface name
770
1499
if (not hasattr(attribute, "_dbus_interface")
771
or not attribute._dbus_interface
772
.startswith("se.recompile.Mandos")):
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
773
1502
continue
774
1503
# Create an alternate D-Bus interface name based on
775
1504
# the current name
776
alt_interface = (attribute._dbus_interface
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
779
1508
# Is this a D-Bus signal?
780
1509
if getattr(attribute, "_dbus_is_signal", False):
781
# Extract the original non-method function by
782
# black magic
783
nonmethod_func = (dict(
1510
if sys.version_info.major == 2:
1511
# Extract the original non-method undecorated
1512
# function by black magic
1513
nonmethod_func = (dict(
784
1514
zip(attribute.func_code.co_freevars,
785
attribute.__closure__))["func"]
786
.cell_contents)
1515
attribute.__closure__))
1516
["func"].cell_contents)
1517
else:
1518
nonmethod_func = attribute
787
1519
# Create a new, but exactly alike, function
788
1520
# object, and decorate it to be a new D-Bus signal
789
1521
# with the alternate D-Bus interface name
790
new_function = (dbus.service.signal
791
(alt_interface,
792
attribute._dbus_signature)
793
(types.FunctionType(
794
nonmethod_func.func_code,
795
nonmethod_func.func_globals,
796
nonmethod_func.func_name,
797
nonmethod_func.func_defaults,
798
nonmethod_func.func_closure)))
1522
if sys.version_info.major == 2:
1523
new_function = types.FunctionType(
1524
nonmethod_func.func_code,
1525
nonmethod_func.func_globals,
1526
nonmethod_func.func_name,
1527
nonmethod_func.func_defaults,
1528
nonmethod_func.func_closure)
1529
else:
1530
new_function = types.FunctionType(
1531
nonmethod_func.__code__,
1532
nonmethod_func.__globals__,
1533
nonmethod_func.__name__,
1534
nonmethod_func.__defaults__,
1535
nonmethod_func.__closure__)
1536
new_function = (dbus.service.signal(
1537
alt_interface,
1538
attribute._dbus_signature)(new_function))
1539
# Copy annotations, if any
1540
try:
1541
new_function._dbus_annotations = dict(
1542
attribute._dbus_annotations)
1543
except AttributeError:
1544
pass
799
1545
# Define a creator of a function to call both the
800
# old and new functions, so both the old and new
801
# signals gets sent when the function is called
1546
# original and alternate functions, so both the
1547
# original and alternate signals gets sent when
1548
# the function is called
802
1549
def fixscope(func1, func2):
803
1550
"""This function is a scope container to pass
804
1551
func1 and func2 to the "call_both" function
805
1552
outside of its arguments"""
1553
1554
@functools.wraps(func2)
806
1555
def call_both(*args, **kwargs):
807
1556
"""This function will emit two D-Bus
808
1557
signals by calling func1 and func2"""
809
1558
func1(*args, **kwargs)
810
1559
func2(*args, **kwargs)
1560
# Make wrapper function look like a D-Bus signal
1561
for name, attr in inspect.getmembers(func2):
1562
if name.startswith("_dbus_"):
1563
setattr(call_both, name, attr)
1564
811
1565
return call_both
812
1566
# Create the "call_both" function and add it to
813
1567
# the class
814
attr[attrname] = fixscope(attribute,
815
new_function)
1568
attr[attrname] = fixscope(attribute, new_function)
816
1569
# Is this a D-Bus method?
817
1570
elif getattr(attribute, "_dbus_is_method", False):
818
1571
# Create a new, but exactly alike, function
819
1572
# object. Decorate it to be a new D-Bus method
820
1573
# with the alternate D-Bus interface name. Add it
821
1574
# to the class.
822
attr[attrname] = (dbus.service.method
823
(alt_interface,
824
attribute._dbus_in_signature,
825
attribute._dbus_out_signature)
826
(types.FunctionType
827
(attribute.func_code,
828
attribute.func_globals,
829
attribute.func_name,
830
attribute.func_defaults,
831
attribute.func_closure)))
1575
attr[attrname] = (
1576
dbus.service.method(
1577
alt_interface,
1578
attribute._dbus_in_signature,
1579
attribute._dbus_out_signature)
1580
(types.FunctionType(attribute.func_code,
1581
attribute.func_globals,
1582
attribute.func_name,
1583
attribute.func_defaults,
1584
attribute.func_closure)))
1585
# Copy annotations, if any
1586
try:
1587
attr[attrname]._dbus_annotations = dict(
1588
attribute._dbus_annotations)
1589
except AttributeError:
1590
pass
832
1591
# Is this a D-Bus property?
833
1592
elif getattr(attribute, "_dbus_is_property", False):
834
1593
# Create a new, but exactly alike, function
835
1594
# object, and decorate it to be a new D-Bus
836
1595
# property with the alternate D-Bus interface
837
1596
# name. Add it to the class.
838
attr[attrname] = (dbus_service_property
839
(alt_interface,
840
attribute._dbus_signature,
841
attribute._dbus_access,
842
attribute
843
._dbus_get_args_options
844
["byte_arrays"])
845
(types.FunctionType
846
(attribute.func_code,
847
attribute.func_globals,
848
attribute.func_name,
849
attribute.func_defaults,
850
attribute.func_closure)))
851
return type.__new__(mcs, name, bases, attr)
852
1597
attr[attrname] = (dbus_service_property(
1598
alt_interface, attribute._dbus_signature,
1599
attribute._dbus_access,
1600
attribute._dbus_get_args_options
1601
["byte_arrays"])
1602
(types.FunctionType(
1603
attribute.func_code,
1604
attribute.func_globals,
1605
attribute.func_name,
1606
attribute.func_defaults,
1607
attribute.func_closure)))
1608
# Copy annotations, if any
1609
try:
1610
attr[attrname]._dbus_annotations = dict(
1611
attribute._dbus_annotations)
1612
except AttributeError:
1613
pass
1614
# Is this a D-Bus interface?
1615
elif getattr(attribute, "_dbus_is_interface", False):
1616
# Create a new, but exactly alike, function
1617
# object. Decorate it to be a new D-Bus interface
1618
# with the alternate D-Bus interface name. Add it
1619
# to the class.
1620
attr[attrname] = (
1621
dbus_interface_annotations(alt_interface)
1622
(types.FunctionType(attribute.func_code,
1623
attribute.func_globals,
1624
attribute.func_name,
1625
attribute.func_defaults,
1626
attribute.func_closure)))
1627
if deprecate:
1628
# Deprecate all alternate interfaces
1629
iname="_AlternateDBusNames_interface_annotation{}"
1630
for interface_name in interface_names:
1631
1632
@dbus_interface_annotations(interface_name)
1633
def func(self):
1634
return { "org.freedesktop.DBus.Deprecated":
1635
"true" }
1636
# Find an unused name
1637
for aname in (iname.format(i)
1638
for i in itertools.count()):
1639
if aname not in attr:
1640
attr[aname] = func
1641
break
1642
if interface_names:
1643
# Replace the class with a new subclass of it with
1644
# methods, signals, etc. as created above.
1645
cls = type(b"{}Alternate".format(cls.__name__),
1646
(cls, ), attr)
1647
return cls
1648
1649
return wrapper
1650
1651
1652
@alternate_dbus_interfaces({"se.recompile.Mandos":
1653
"se.bsnet.fukt.Mandos"})
853
1654
class ClientDBus(Client, DBusObjectWithProperties):
854
1655
"""A Client class using D-Bus
855
1656
859
1660
"""
860
1661
861
1662
runtime_expansions = (Client.runtime_expansions
862
+ ("dbus_object_path",))
1663
+ ("dbus_object_path", ))
1664
1665
_interface = "se.recompile.Mandos.Client"
863
1666
864
1667
# dbus.service.Object doesn't use super(), so we can't either.
865
1668
866
1669
def __init__(self, bus = None, *args, **kwargs):
867
self._approvals_pending = 0
868
1670
self.bus = bus
869
1671
Client.__init__(self, *args, **kwargs)
870
1672
# Only now, when this client is initialized, can it show up on
871
1673
# the D-Bus
872
client_object_name = unicode(self.name).translate(
1674
client_object_name = str(self.name).translate(
873
1675
{ord("."): ord("_"),
874
1676
ord("-"): ord("_")})
875
self.dbus_object_path = (dbus.ObjectPath
876
("/clients/" + client_object_name))
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
877
1679
DBusObjectWithProperties.__init__(self, self.bus,
878
1680
self.dbus_object_path)
879
880
def notifychangeproperty(transform_func,
881
dbus_name, type_func=lambda x: x,
882
variant_level=1):
1681
1682
def notifychangeproperty(transform_func, dbus_name,
1683
type_func=lambda x: x,
1684
variant_level=1,
1685
invalidate_only=False,
1686
_interface=_interface):
883
1687
""" Modify a variable so that it's a property which announces
884
1688
its changes to DBus.
885
886
transform_fun: Function that takes a value and transforms it
887
to a D-Bus type.
1689
1690
transform_fun: Function that takes a value and a variant_level
1691
and transforms it to a D-Bus type.
888
1692
dbus_name: D-Bus name of the variable
889
1693
type_func: Function that transform the value before sending it
890
1694
to the D-Bus. Default: no transform
891
1695
variant_level: D-Bus variant level. Default: 1
892
1696
"""
893
real_value = [None,]
1697
attrname = "_{}".format(dbus_name)
1698
894
1699
def setter(self, value):
895
old_value = real_value[0]
896
real_value[0] = value
897
1700
if hasattr(self, "dbus_object_path"):
898
if type_func(old_value) != type_func(real_value[0]):
899
dbus_value = transform_func(type_func(real_value[0]),
900
variant_level)
901
self.PropertyChanged(dbus.String(dbus_name),
902
dbus_value)
1701
if (not hasattr(self, attrname) or
1702
type_func(getattr(self, attrname, None))
1703
!= type_func(value)):
1704
if invalidate_only:
1705
self.PropertiesChanged(
1706
_interface, dbus.Dictionary(),
1707
dbus.Array((dbus_name, )))
1708
else:
1709
dbus_value = transform_func(
1710
type_func(value),
1711
variant_level = variant_level)
1712
self.PropertyChanged(dbus.String(dbus_name),
1713
dbus_value)
1714
self.PropertiesChanged(
1715
_interface,
1716
dbus.Dictionary({ dbus.String(dbus_name):
1717
dbus_value }),
1718
dbus.Array())
1719
setattr(self, attrname, value)
903
1720
904
return property(lambda self: real_value[0], setter)
905
1721
return property(lambda self: getattr(self, attrname), setter)
906
1722
907
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
908
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
911
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
912
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
913
1729
"LastEnabled")
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
915
type_func = lambda checker: checker is not None)
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
916
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
917
1734
"LastCheckedOK")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1737
last_approval_request = notifychangeproperty(
1738
datetime_to_dbus, "LastApprovalRequest")
920
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
921
1740
"ApprovedByDefault")
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
1744
approval_duration = notifychangeproperty(
1745
dbus.UInt64, "ApprovalDuration",
1746
type_func = lambda td: td.total_seconds() * 1000)
926
1747
host = notifychangeproperty(dbus.String, "Host")
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
1751
extended_timeout = notifychangeproperty(
1752
dbus.UInt64, "ExtendedTimeout",
1753
type_func = lambda td: td.total_seconds() * 1000)
1754
interval = notifychangeproperty(
1755
dbus.UInt64, "Interval",
1756
type_func = lambda td: td.total_seconds() * 1000)
933
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
934
1760
935
1761
del notifychangeproperty
936
1762
943
1769
DBusObjectWithProperties.__del__(self, *args, **kwargs)
944
1770
Client.__del__(self, *args, **kwargs)
945
1771
946
def checker_callback(self, pid, condition, command,
947
*args, **kwargs):
948
self.checker_callback_tag = None
949
self.checker = None
950
if os.WIFEXITED(condition):
951
exitstatus = os.WEXITSTATUS(condition)
1772
def checker_callback(self, source, condition,
1773
connection, command, *args, **kwargs):
1774
ret = Client.checker_callback(self, source, condition,
1775
connection, command, *args,
1776
**kwargs)
1777
exitstatus = self.last_checker_status
1778
if exitstatus >= 0:
952
1779
# Emit D-Bus signal
953
1780
self.CheckerCompleted(dbus.Int16(exitstatus),
954
dbus.Int64(condition),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
955
1783
dbus.String(command))
956
1784
else:
957
1785
# Emit D-Bus signal
958
1786
self.CheckerCompleted(dbus.Int16(-1),
959
dbus.Int64(condition),
1787
dbus.Int64(
1788
# This is specific to GNU libC
1789
(exitstatus << 8)
1790
| self.last_checker_signal),
960
1791
dbus.String(command))
961
962
return Client.checker_callback(self, pid, condition, command,
963
*args, **kwargs)
1792
return ret
964
1793
965
1794
def start_checker(self, *args, **kwargs):
966
old_checker = self.checker
967
if self.checker is not None:
968
old_checker_pid = self.checker.pid
969
else:
970
old_checker_pid = None
1795
old_checker_pid = getattr(self.checker, "pid", None)
971
1796
r = Client.start_checker(self, *args, **kwargs)
972
1797
# Only if new checker process was started
973
1798
if (self.checker is not None
977
1802
return r
978
1803
979
1804
def _reset_approved(self):
980
self._approved = None
1805
self.approved = None
981
1806
return False
982
1807
983
1808
def approve(self, value=True):
1809
self.approved = value
1810
gobject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
984
1812
self.send_changedstate()
985
self._approved = value
986
gobject.timeout_add(_timedelta_to_milliseconds
987
(self.approval_duration),
988
self._reset_approved)
989
990
1813
991
1814
## D-Bus methods, signals & properties
992
_interface = "se.recompile.Mandos.Client"
1815
1816
## Interfaces
993
1817
994
1818
## Signals
995
1819
1006
1830
pass
1007
1831
1008
1832
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1009
1834
@dbus.service.signal(_interface, signature="sv")
1010
1835
def PropertyChanged(self, property, value):
1011
1836
"D-Bus signal"
1045
1870
self.checked_ok()
1046
1871
1047
1872
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1048
1874
@dbus.service.method(_interface)
1049
1875
def Enable(self):
1050
1876
"D-Bus method"
1051
1877
self.enable()
1052
1878
1053
1879
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1054
1881
@dbus.service.method(_interface)
1055
1882
def StartChecker(self):
1056
1883
"D-Bus method"
1057
1884
self.start_checker()
1058
1885
1059
1886
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1060
1888
@dbus.service.method(_interface)
1061
1889
def Disable(self):
1062
1890
"D-Bus method"
1063
1891
self.disable()
1064
1892
1065
1893
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1066
1895
@dbus.service.method(_interface)
1067
1896
def StopChecker(self):
1068
1897
self.stop_checker()
1075
1904
return dbus.Boolean(bool(self.approvals_pending))
1076
1905
1077
1906
# ApprovedByDefault - property
1078
@dbus_service_property(_interface, signature="b",
1907
@dbus_service_property(_interface,
1908
signature="b",
1079
1909
access="readwrite")
1080
1910
def ApprovedByDefault_dbus_property(self, value=None):
1081
1911
if value is None: # get
1083
1913
self.approved_by_default = bool(value)
1084
1914
1085
1915
# ApprovalDelay - property
1086
@dbus_service_property(_interface, signature="t",
1916
@dbus_service_property(_interface,
1917
signature="t",
1087
1918
access="readwrite")
1088
1919
def ApprovalDelay_dbus_property(self, value=None):
1089
1920
if value is None: # get
1090
return dbus.UInt64(self.approval_delay_milliseconds())
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1922
* 1000)
1091
1923
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1092
1924
1093
1925
# ApprovalDuration - property
1094
@dbus_service_property(_interface, signature="t",
1926
@dbus_service_property(_interface,
1927
signature="t",
1095
1928
access="readwrite")
1096
1929
def ApprovalDuration_dbus_property(self, value=None):
1097
1930
if value is None: # get
1098
return dbus.UInt64(_timedelta_to_milliseconds(
1099
self.approval_duration))
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1932
* 1000)
1100
1933
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1101
1934
1102
1935
# Name - property
1936
@dbus_annotations(
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1103
1938
@dbus_service_property(_interface, signature="s", access="read")
1104
1939
def Name_dbus_property(self):
1105
1940
return dbus.String(self.name)
1106
1941
1107
1942
# Fingerprint - property
1943
@dbus_annotations(
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1108
1945
@dbus_service_property(_interface, signature="s", access="read")
1109
1946
def Fingerprint_dbus_property(self):
1110
1947
return dbus.String(self.fingerprint)
1111
1948
1112
1949
# Host - property
1113
@dbus_service_property(_interface, signature="s",
1950
@dbus_service_property(_interface,
1951
signature="s",
1114
1952
access="readwrite")
1115
1953
def Host_dbus_property(self, value=None):
1116
1954
if value is None: # get
1117
1955
return dbus.String(self.host)
1118
self.host = value
1956
self.host = str(value)
1119
1957
1120
1958
# Created - property
1959
@dbus_annotations(
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1121
1961
@dbus_service_property(_interface, signature="s", access="read")
1122
1962
def Created_dbus_property(self):
1123
return dbus.String(datetime_to_dbus(self.created))
1963
return datetime_to_dbus(self.created)
1124
1964
1125
1965
# LastEnabled - property
1126
1966
@dbus_service_property(_interface, signature="s", access="read")
1128
1968
return datetime_to_dbus(self.last_enabled)
1129
1969
1130
1970
# Enabled - property
1131
@dbus_service_property(_interface, signature="b",
1971
@dbus_service_property(_interface,
1972
signature="b",
1132
1973
access="readwrite")
1133
1974
def Enabled_dbus_property(self, value=None):
1134
1975
if value is None: # get
1139
1980
self.disable()
1140
1981
1141
1982
# LastCheckedOK - property
1142
@dbus_service_property(_interface, signature="s",
1983
@dbus_service_property(_interface,
1984
signature="s",
1143
1985
access="readwrite")
1144
1986
def LastCheckedOK_dbus_property(self, value=None):
1145
1987
if value is not None:
1147
1989
return
1148
1990
return datetime_to_dbus(self.last_checked_ok)
1149
1991
1992
# LastCheckerStatus - property
1993
@dbus_service_property(_interface, signature="n", access="read")
1994
def LastCheckerStatus_dbus_property(self):
1995
return dbus.Int16(self.last_checker_status)
1996
1150
1997
# Expires - property
1151
1998
@dbus_service_property(_interface, signature="s", access="read")
1152
1999
def Expires_dbus_property(self):
1158
2005
return datetime_to_dbus(self.last_approval_request)
1159
2006
1160
2007
# Timeout - property
1161
@dbus_service_property(_interface, signature="t",
2008
@dbus_service_property(_interface,
2009
signature="t",
1162
2010
access="readwrite")
1163
2011
def Timeout_dbus_property(self, value=None):
1164
2012
if value is None: # get
1165
return dbus.UInt64(self.timeout_milliseconds())
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
1166
2015
self.timeout = datetime.timedelta(0, 0, 0, value)
1167
if getattr(self, "disable_initiator_tag", None) is None:
1168
return
1169
# Reschedule timeout
1170
gobject.source_remove(self.disable_initiator_tag)
1171
self.disable_initiator_tag = None
1172
self.expires = None
1173
time_to_die = (self.
1174
_timedelta_to_milliseconds((self
1175
.last_checked_ok
1176
+ self.timeout)
1177
- datetime.datetime
1178
.utcnow()))
1179
if time_to_die <= 0:
1180
# The timeout has passed
1181
self.disable()
1182
else:
1183
self.expires = (datetime.datetime.utcnow()
1184
+ datetime.timedelta(milliseconds = time_to_die))
1185
self.disable_initiator_tag = (gobject.timeout_add
1186
(time_to_die, self.disable))
2016
# Reschedule disabling
2017
if self.enabled:
2018
now = datetime.datetime.utcnow()
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
2021
# The timeout has passed
2022
self.disable()
2023
else:
2024
if (getattr(self, "disable_initiator_tag", None)
2025
is None):
2026
return
2027
gobject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = gobject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2030
self.disable)
1187
2031
1188
2032
# ExtendedTimeout - property
1189
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
2034
signature="t",
1190
2035
access="readwrite")
1191
2036
def ExtendedTimeout_dbus_property(self, value=None):
1192
2037
if value is None: # get
1193
return dbus.UInt64(self.extended_timeout_milliseconds())
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2039
* 1000)
1194
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1195
2041
1196
2042
# Interval - property
1197
@dbus_service_property(_interface, signature="t",
2043
@dbus_service_property(_interface,
2044
signature="t",
1198
2045
access="readwrite")
1199
2046
def Interval_dbus_property(self, value=None):
1200
2047
if value is None: # get
1201
return dbus.UInt64(self.interval_milliseconds())
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1202
2049
self.interval = datetime.timedelta(0, 0, 0, value)
1203
2050
if getattr(self, "checker_initiator_tag", None) is None:
1204
2051
return
1205
# Reschedule checker run
1206
gobject.source_remove(self.checker_initiator_tag)
1207
self.checker_initiator_tag = (gobject.timeout_add
1208
(value, self.start_checker))
1209
self.start_checker() # Start one now, too
2052
if self.enabled:
2053
# Reschedule checker run
2054
gobject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = gobject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
1210
2058
1211
2059
# Checker - property
1212
@dbus_service_property(_interface, signature="s",
2060
@dbus_service_property(_interface,
2061
signature="s",
1213
2062
access="readwrite")
1214
2063
def Checker_dbus_property(self, value=None):
1215
2064
if value is None: # get
1216
2065
return dbus.String(self.checker_command)
1217
self.checker_command = value
2066
self.checker_command = str(value)
1218
2067
1219
2068
# CheckerRunning - property
1220
@dbus_service_property(_interface, signature="b",
2069
@dbus_service_property(_interface,
2070
signature="b",
1221
2071
access="readwrite")
1222
2072
def CheckerRunning_dbus_property(self, value=None):
1223
2073
if value is None: # get
1228
2078
self.stop_checker()
1229
2079
1230
2080
# ObjectPath - property
2081
@dbus_annotations(
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
1231
2084
@dbus_service_property(_interface, signature="o", access="read")
1232
2085
def ObjectPath_dbus_property(self):
1233
2086
return self.dbus_object_path # is already a dbus.ObjectPath
1234
2087
1235
2088
# Secret = property
1236
@dbus_service_property(_interface, signature="ay",
1237
access="write", byte_arrays=True)
2089
@dbus_annotations(
2090
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2091
"invalidates"})
2092
@dbus_service_property(_interface,
2093
signature="ay",
2094
access="write",
2095
byte_arrays=True)
1238
2096
def Secret_dbus_property(self, value):
1239
self.secret = str(value)
2097
self.secret = bytes(value)
1240
2098
1241
2099
del _interface
1242
2100
1246
2104
self._pipe = child_pipe
1247
2105
self._pipe.send(('init', fpr, address))
1248
2106
if not self._pipe.recv():
1249
raise KeyError()
2107
raise KeyError(fpr)
1250
2108
1251
2109
def __getattribute__(self, name):
1252
if(name == '_pipe'):
2110
if name == '_pipe':
1253
2111
return super(ProxyClient, self).__getattribute__(name)
1254
2112
self._pipe.send(('getattr', name))
1255
2113
data = self._pipe.recv()
1256
2114
if data[0] == 'data':
1257
2115
return data[1]
1258
2116
if data[0] == 'function':
2117
1259
2118
def func(*args, **kwargs):
1260
2119
self._pipe.send(('funcall', name, args, kwargs))
1261
2120
return self._pipe.recv()[1]
2121
1262
2122
return func
1263
2123
1264
2124
def __setattr__(self, name, value):
1265
if(name == '_pipe'):
2125
if name == '_pipe':
1266
2126
return super(ProxyClient, self).__setattr__(name, value)
1267
2127
self._pipe.send(('setattr', name, value))
1268
2128
1269
class ClientDBusTransitional(ClientDBus):
1270
__metaclass__ = AlternateDBusNamesMetaclass
1271
2129
1272
2130
class ClientHandler(socketserver.BaseRequestHandler, object):
1273
2131
"""A class to handle client connections.
1278
2136
def handle(self):
1279
2137
with contextlib.closing(self.server.child_pipe) as child_pipe:
1280
2138
logger.info("TCP connection from: %s",
1281
unicode(self.client_address))
2139
str(self.client_address))
1282
2140
logger.debug("Pipe FD: %d",
1283
2141
self.server.child_pipe.fileno())
1284
2142
1285
session = (gnutls.connection
1286
.ClientSession(self.request,
1287
gnutls.connection
1288
.X509Credentials()))
1289
1290
# Note: gnutls.connection.X509Credentials is really a
1291
# generic GnuTLS certificate credentials object so long as
1292
# no X.509 keys are added to it. Therefore, we can use it
1293
# here despite using OpenPGP certificates.
2143
session = gnutls.ClientSession(self.request)
1294
2144
1295
2145
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1296
2146
# "+AES-256-CBC", "+SHA1",
1300
2150
priority = self.server.gnutls_priority
1301
2151
if priority is None:
1302
2152
priority = "NORMAL"
1303
(gnutls.library.functions
1304
.gnutls_priority_set_direct(session._c_object,
1305
priority, None))
2153
gnutls.priority_set_direct(session._c_object, priority,
2154
None)
1306
2155
1307
2156
# Start communication using the Mandos protocol
1308
2157
# Get protocol number
1310
2159
logger.debug("Protocol version: %r", line)
1311
2160
try:
1312
2161
if int(line.strip().split()[0]) > 1:
1313
raise RuntimeError
2162
raise RuntimeError(line)
1314
2163
except (ValueError, IndexError, RuntimeError) as error:
1315
2164
logger.error("Unknown protocol version: %s", error)
1316
2165
return
1318
2167
# Start GnuTLS connection
1319
2168
try:
1320
2169
session.handshake()
1321
except gnutls.errors.GNUTLSError as error:
2170
except gnutls.Error as error:
1322
2171
logger.warning("Handshake failed: %s", error)
1323
2172
# Do not run session.bye() here: the session is not
1324
2173
# established. Just abandon the request.
1328
2177
approval_required = False
1329
2178
try:
1330
2179
try:
1331
fpr = self.fingerprint(self.peer_certificate
1332
(session))
1333
except (TypeError,
1334
gnutls.errors.GNUTLSError) as error:
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
1335
2183
logger.warning("Bad certificate: %s", error)
1336
2184
return
1337
2185
logger.debug("Fingerprint: %s", fpr)
1350
2198
while True:
1351
2199
if not client.enabled:
1352
2200
logger.info("Client %s is disabled",
1353
client.name)
2201
client.name)
1354
2202
if self.server.use_dbus:
1355
2203
# Emit D-Bus signal
1356
client.Rejected("Disabled")
2204
client.Rejected("Disabled")
1357
2205
return
1358
2206
1359
if client._approved or not client.approval_delay:
2207
if client.approved or not client.approval_delay:
1360
2208
#We are approved or approval is disabled
1361
2209
break
1362
elif client._approved is None:
2210
elif client.approved is None:
1363
2211
logger.info("Client %s needs approval",
1364
2212
client.name)
1365
2213
if self.server.use_dbus:
1366
2214
# Emit D-Bus signal
1367
2215
client.NeedApproval(
1368
client.approval_delay_milliseconds(),
1369
client.approved_by_default)
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
1370
2218
else:
1371
2219
logger.warning("Client %s was not approved",
1372
2220
client.name)
1376
2224
return
1377
2225
1378
2226
#wait until timeout or approved
1379
#x = float(client._timedelta_to_milliseconds(delay))
1380
2227
time = datetime.datetime.now()
1381
2228
client.changedstate.acquire()
1382
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2229
client.changedstate.wait(delay.total_seconds())
1383
2230
client.changedstate.release()
1384
2231
time2 = datetime.datetime.now()
1385
2232
if (time2 - time) >= delay:
1396
2243
else:
1397
2244
delay -= time2 - time
1398
2245
1399
sent_size = 0
1400
while sent_size < len(client.secret):
1401
try:
1402
sent = session.send(client.secret[sent_size:])
1403
except gnutls.errors.GNUTLSError as error:
1404
logger.warning("gnutls send failed")
1405
return
1406
logger.debug("Sent: %d, remaining: %d",
1407
sent, len(client.secret)
1408
- (sent_size + sent))
1409
sent_size += sent
2246
try:
2247
session.send(client.secret)
2248
except gnutls.Error as error:
2249
logger.warning("gnutls send failed",
2250
exc_info = error)
2251
return
1410
2252
1411
2253
logger.info("Sending secret to %s", client.name)
1412
# bump the timeout as if seen
1413
client.checked_ok(client.extended_timeout)
2254
# bump the timeout using extended_timeout
2255
client.bump_timeout(client.extended_timeout)
1414
2256
if self.server.use_dbus:
1415
2257
# Emit D-Bus signal
1416
2258
client.GotSecret()
1420
2262
client.approvals_pending -= 1
1421
2263
try:
1422
2264
session.bye()
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("GnuTLS bye failed")
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
2267
exc_info=error)
1425
2268
1426
2269
@staticmethod
1427
2270
def peer_certificate(session):
1428
2271
"Return the peer's OpenPGP certificate as a bytestring"
1429
2272
# If not an OpenPGP certificate...
1430
if (gnutls.library.functions
1431
.gnutls_certificate_type_get(session._c_object)
1432
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1433
# ...do the normal thing
1434
return session.peer_certificate
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
2276
return b""
1435
2277
list_size = ctypes.c_uint(1)
1436
cert_list = (gnutls.library.functions
1437
.gnutls_certificate_get_peers
2278
cert_list = (gnutls.certificate_get_peers
1438
2279
(session._c_object, ctypes.byref(list_size)))
1439
2280
if not bool(cert_list) and list_size.value != 0:
1440
raise gnutls.errors.GNUTLSError("error getting peer"
1441
" certificate")
2281
raise gnutls.Error("error getting peer certificate")
1442
2282
if list_size.value == 0:
1443
2283
return None
1444
2284
cert = cert_list[0]
1448
2288
def fingerprint(openpgp):
1449
2289
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1450
2290
# New GnuTLS "datum" with the OpenPGP public key
1451
datum = (gnutls.library.types
1452
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1453
ctypes.POINTER
1454
(ctypes.c_ubyte)),
1455
ctypes.c_uint(len(openpgp))))
2291
datum = gnutls.datum_t(
2292
ctypes.cast(ctypes.c_char_p(openpgp),
2293
ctypes.POINTER(ctypes.c_ubyte)),
2294
ctypes.c_uint(len(openpgp)))
1456
2295
# New empty GnuTLS certificate
1457
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1458
(gnutls.library.functions
1459
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1460
2298
# Import the OpenPGP public key into the certificate
1461
(gnutls.library.functions
1462
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1463
gnutls.library.constants
1464
.GNUTLS_OPENPGP_FMT_RAW))
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1465
2301
# Verify the self signature in the key
1466
2302
crtverify = ctypes.c_uint()
1467
(gnutls.library.functions
1468
.gnutls_openpgp_crt_verify_self(crt, 0,
1469
ctypes.byref(crtverify)))
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1470
2305
if crtverify.value != 0:
1471
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1472
raise (gnutls.errors.CertificateSecurityError
1473
("Verify failed"))
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1474
2308
# New buffer for the fingerprint
1475
2309
buf = ctypes.create_string_buffer(20)
1476
2310
buf_len = ctypes.c_size_t()
1477
2311
# Get the fingerprint from the certificate into the buffer
1478
(gnutls.library.functions
1479
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1480
ctypes.byref(buf_len)))
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1481
2314
# Deinit the certificate
1482
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2315
gnutls.openpgp_crt_deinit(crt)
1483
2316
# Convert the buffer to a Python bytestring
1484
2317
fpr = ctypes.string_at(buf, buf_len.value)
1485
2318
# Convert the bytestring to hexadecimal notation
1486
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2319
hex_fpr = binascii.hexlify(fpr).upper()
1487
2320
return hex_fpr
1488
2321
1489
2322
1490
2323
class MultiprocessingMixIn(object):
1491
2324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2325
1492
2326
def sub_process_main(self, request, address):
1493
2327
try:
1494
2328
self.finish_request(request, address)
1495
except:
2329
except Exception:
1496
2330
self.handle_error(request, address)
1497
2331
self.close_request(request)
1498
2332
1499
2333
def process_request(self, request, address):
1500
2334
"""Start a new process to process the request."""
1501
multiprocessing.Process(target = self.sub_process_main,
1502
args = (request, address)).start()
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
2337
proc.start()
2338
return proc
1503
2339
1504
2340
1505
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1506
2342
""" adds a pipe to the MixIn """
2343
1507
2344
def process_request(self, request, client_address):
1508
2345
"""Overrides and wraps the original process_request().
1509
2346
1511
2348
"""
1512
2349
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1513
2350
1514
super(MultiprocessingMixInWithPipe,
1515
self).process_request(request, client_address)
2351
proc = MultiprocessingMixIn.process_request(self, request,
2352
client_address)
1516
2353
self.child_pipe.close()
1517
self.add_pipe(parent_pipe)
2354
self.add_pipe(parent_pipe, proc)
1518
2355
1519
def add_pipe(self, parent_pipe):
2356
def add_pipe(self, parent_pipe, proc):
1520
2357
"""Dummy function; override as necessary"""
1521
raise NotImplementedError
2358
raise NotImplementedError()
1522
2359
1523
2360
1524
2361
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1530
2367
interface: None or a network interface name (string)
1531
2368
use_ipv6: Boolean; to use IPv6 or not
1532
2369
"""
2370
1533
2371
def __init__(self, server_address, RequestHandlerClass,
1534
interface=None, use_ipv6=True):
2372
interface=None,
2373
use_ipv6=True,
2374
socketfd=None):
2375
"""If socketfd is set, use that file descriptor instead of
2376
creating a new one with socket.socket().
2377
"""
1535
2378
self.interface = interface
1536
2379
if use_ipv6:
1537
2380
self.address_family = socket.AF_INET6
2381
if socketfd is not None:
2382
# Save the file descriptor
2383
self.socketfd = socketfd
2384
# Save the original socket.socket() function
2385
self.socket_socket = socket.socket
2386
# To implement --socket, we monkey patch socket.socket.
2387
#
2388
# (When socketserver.TCPServer is a new-style class, we
2389
# could make self.socket into a property instead of monkey
2390
# patching socket.socket.)
2391
#
2392
# Create a one-time-only replacement for socket.socket()
2393
@functools.wraps(socket.socket)
2394
def socket_wrapper(*args, **kwargs):
2395
# Restore original function so subsequent calls are
2396
# not affected.
2397
socket.socket = self.socket_socket
2398
del self.socket_socket
2399
# This time only, return a new socket object from the
2400
# saved file descriptor.
2401
return socket.fromfd(self.socketfd, *args, **kwargs)
2402
# Replace socket.socket() function with wrapper
2403
socket.socket = socket_wrapper
2404
# The socketserver.TCPServer.__init__ will call
2405
# socket.socket(), which might be our replacement,
2406
# socket_wrapper(), if socketfd was set.
1538
2407
socketserver.TCPServer.__init__(self, server_address,
1539
2408
RequestHandlerClass)
2409
1540
2410
def server_bind(self):
1541
2411
"""This overrides the normal server_bind() function
1542
2412
to bind to an interface if one was specified, and also NOT to
1548
2418
self.interface)
1549
2419
else:
1550
2420
try:
1551
self.socket.setsockopt(socket.SOL_SOCKET,
1552
SO_BINDTODEVICE,
1553
str(self.interface
1554
+ '\0'))
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
1555
2424
except socket.error as error:
1556
if error[0] == errno.EPERM:
1557
logger.error("No permission to"
1558
" bind to interface %s",
1559
self.interface)
1560
elif error[0] == errno.ENOPROTOOPT:
2425
if error.errno == errno.EPERM:
2426
logger.error("No permission to bind to"
2427
" interface %s", self.interface)
2428
elif error.errno == errno.ENOPROTOOPT:
1561
2429
logger.error("SO_BINDTODEVICE not available;"
1562
2430
" cannot bind to interface %s",
1563
2431
self.interface)
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
1564
2435
else:
1565
2436
raise
1566
2437
# Only bind(2) the socket if we really need to.
1569
2440
if self.address_family == socket.AF_INET6:
1570
2441
any_address = "::" # in6addr_any
1571
2442
else:
1572
any_address = socket.INADDR_ANY
2443
any_address = "0.0.0.0" # INADDR_ANY
1573
2444
self.server_address = (any_address,
1574
2445
self.server_address[1])
1575
2446
elif not self.server_address[1]:
1576
self.server_address = (self.server_address[0],
1577
0)
2447
self.server_address = (self.server_address[0], 0)
1578
2448
# if self.interface:
1579
2449
# self.server_address = (self.server_address[0],
1580
2450
# 0, # port
1594
2464
1595
2465
Assumes a gobject.MainLoop event loop.
1596
2466
"""
2467
1597
2468
def __init__(self, server_address, RequestHandlerClass,
1598
interface=None, use_ipv6=True, clients=None,
1599
gnutls_priority=None, use_dbus=True):
2469
interface=None,
2470
use_ipv6=True,
2471
clients=None,
2472
gnutls_priority=None,
2473
use_dbus=True,
2474
socketfd=None):
1600
2475
self.enabled = False
1601
2476
self.clients = clients
1602
2477
if self.clients is None:
1603
self.clients = set()
2478
self.clients = {}
1604
2479
self.use_dbus = use_dbus
1605
2480
self.gnutls_priority = gnutls_priority
1606
2481
IPv6_TCPServer.__init__(self, server_address,
1607
2482
RequestHandlerClass,
1608
2483
interface = interface,
1609
use_ipv6 = use_ipv6)
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1610
2487
def server_activate(self):
1611
2488
if self.enabled:
1612
2489
return socketserver.TCPServer.server_activate(self)
2490
1613
2491
def enable(self):
1614
2492
self.enabled = True
1615
def add_pipe(self, parent_pipe):
2493
2494
def add_pipe(self, parent_pipe, proc):
1616
2495
# Call "handle_ipc" for both data and EOF events
1617
gobject.io_add_watch(parent_pipe.fileno(),
1618
gobject.IO_IN | gobject.IO_HUP,
1619
functools.partial(self.handle_ipc,
1620
parent_pipe = parent_pipe))
1621
1622
def handle_ipc(self, source, condition, parent_pipe=None,
2496
gobject.io_add_watch(
2497
parent_pipe.fileno(),
2498
gobject.IO_IN | gobject.IO_HUP,
2499
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2501
proc = proc))
2502
2503
def handle_ipc(self, source, condition,
2504
parent_pipe=None,
2505
proc = None,
1623
2506
client_object=None):
1624
condition_names = {
1625
gobject.IO_IN: "IN", # There is data to read.
1626
gobject.IO_OUT: "OUT", # Data can be written (without
1627
# blocking).
1628
gobject.IO_PRI: "PRI", # There is urgent data to read.
1629
gobject.IO_ERR: "ERR", # Error condition.
1630
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1631
# broken, usually for pipes and
1632
# sockets).
1633
}
1634
conditions_string = ' | '.join(name
1635
for cond, name in
1636
condition_names.iteritems()
1637
if cond & condition)
1638
# error or the other end of multiprocessing.Pipe has closed
1639
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2507
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2509
# Wait for other process to exit
2510
proc.join()
1640
2511
return False
1641
2512
1642
2513
# Read a request from the child
1647
2518
fpr = request[1]
1648
2519
address = request[2]
1649
2520
1650
for c in self.clients:
2521
for c in self.clients.itervalues():
1651
2522
if c.fingerprint == fpr:
1652
2523
client = c
1653
2524
break
1656
2527
"dress: %s", fpr, address)
1657
2528
if self.use_dbus:
1658
2529
# Emit D-Bus signal
1659
mandos_dbus_service.ClientNotFound(fpr, address[0])
2530
mandos_dbus_service.ClientNotFound(fpr,
2531
address[0])
1660
2532
parent_pipe.send(False)
1661
2533
return False
1662
2534
1663
gobject.io_add_watch(parent_pipe.fileno(),
1664
gobject.IO_IN | gobject.IO_HUP,
1665
functools.partial(self.handle_ipc,
1666
parent_pipe = parent_pipe,
1667
client_object = client))
2535
gobject.io_add_watch(
2536
parent_pipe.fileno(),
2537
gobject.IO_IN | gobject.IO_HUP,
2538
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2540
proc = proc,
2541
client_object = client))
1668
2542
parent_pipe.send(True)
1669
# remove the old hook in favor of the new above hook on same fileno
2543
# remove the old hook in favor of the new above hook on
2544
# same fileno
1670
2545
return False
1671
2546
if command == 'funcall':
1672
2547
funcname = request[1]
1673
2548
args = request[2]
1674
2549
kwargs = request[3]
1675
2550
1676
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2551
parent_pipe.send(('data', getattr(client_object,
2552
funcname)(*args,
2553
**kwargs)))
1677
2554
1678
2555
if command == 'getattr':
1679
2556
attrname = request[1]
1680
if callable(client_object.__getattribute__(attrname)):
1681
parent_pipe.send(('function',))
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
1682
2560
else:
1683
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2561
parent_pipe.send((
2562
'data', client_object.__getattribute__(attrname)))
1684
2563
1685
2564
if command == 'setattr':
1686
2565
attrname = request[1]
1690
2569
return True
1691
2570
1692
2571
2572
def rfc3339_duration_to_delta(duration):
2573
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2574
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
2589
"""
2590
2591
# Parsing an RFC 3339 duration with regular expressions is not
2592
# possible - there would have to be multiple places for the same
2593
# values, like seconds. The current code, while more esoteric, is
2594
# cleaner without depending on a parsing library. If Python had a
2595
# built-in library for parsing we would use it, but we'd like to
2596
# avoid excessive use of external libraries.
2597
2598
# New type for defining tokens, syntax, and semantics all-in-one
2599
Token = collections.namedtuple("Token", (
2600
"regexp", # To match token; if "value" is not None, must have
2601
# a "group" containing digits
2602
"value", # datetime.timedelta or None
2603
"followers")) # Tokens valid after this token
2604
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2605
# the "duration" ABNF definition in RFC 3339, Appendix A.
2606
token_end = Token(re.compile(r"$"), None, frozenset())
2607
token_second = Token(re.compile(r"(\d+)S"),
2608
datetime.timedelta(seconds=1),
2609
frozenset((token_end, )))
2610
token_minute = Token(re.compile(r"(\d+)M"),
2611
datetime.timedelta(minutes=1),
2612
frozenset((token_second, token_end)))
2613
token_hour = Token(re.compile(r"(\d+)H"),
2614
datetime.timedelta(hours=1),
2615
frozenset((token_minute, token_end)))
2616
token_time = Token(re.compile(r"T"),
2617
None,
2618
frozenset((token_hour, token_minute,
2619
token_second)))
2620
token_day = Token(re.compile(r"(\d+)D"),
2621
datetime.timedelta(days=1),
2622
frozenset((token_time, token_end)))
2623
token_month = Token(re.compile(r"(\d+)M"),
2624
datetime.timedelta(weeks=4),
2625
frozenset((token_day, token_end)))
2626
token_year = Token(re.compile(r"(\d+)Y"),
2627
datetime.timedelta(weeks=52),
2628
frozenset((token_month, token_end)))
2629
token_week = Token(re.compile(r"(\d+)W"),
2630
datetime.timedelta(weeks=1),
2631
frozenset((token_end, )))
2632
token_duration = Token(re.compile(r"P"), None,
2633
frozenset((token_year, token_month,
2634
token_day, token_time,
2635
token_week)))
2636
# Define starting values
2637
value = datetime.timedelta() # Value so far
2638
found_token = None
2639
followers = frozenset((token_duration, )) # Following valid tokens
2640
s = duration # String left to parse
2641
# Loop until end token is found
2642
while found_token is not token_end:
2643
# Search for any currently valid tokens
2644
for token in followers:
2645
match = token.regexp.match(s)
2646
if match is not None:
2647
# Token found
2648
if token.value is not None:
2649
# Value found, parse digits
2650
factor = int(match.group(1), 10)
2651
# Add to value so far
2652
value += factor * token.value
2653
# Strip token from string
2654
s = token.regexp.sub("", s, 1)
2655
# Go to found token
2656
found_token = token
2657
# Set valid next tokens
2658
followers = found_token.followers
2659
break
2660
else:
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
2663
.format(duration))
2664
# End token found
2665
return value
2666
2667
1693
2668
def string_to_delta(interval):
1694
2669
"""Parse a string and return a datetime.timedelta
1695
2670
1706
2681
>>> string_to_delta('5m 30s')
1707
2682
datetime.timedelta(0, 330)
1708
2683
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
1709
2690
timevalue = datetime.timedelta(0)
1710
2691
for s in interval.split():
1711
2692
try:
1712
suffix = unicode(s[-1])
2693
suffix = s[-1]
1713
2694
value = int(s[:-1])
1714
2695
if suffix == "d":
1715
2696
delta = datetime.timedelta(value)
1722
2703
elif suffix == "w":
1723
2704
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1724
2705
else:
1725
raise ValueError("Unknown suffix %r" % suffix)
1726
except (ValueError, IndexError) as e:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
1727
2708
raise ValueError(*(e.args))
1728
2709
timevalue += delta
1729
2710
return timevalue
1730
2711
1731
2712
1732
def if_nametoindex(interface):
1733
"""Call the C function if_nametoindex(), or equivalent
1734
1735
Note: This function cannot accept a unicode string."""
1736
global if_nametoindex
1737
try:
1738
if_nametoindex = (ctypes.cdll.LoadLibrary
1739
(ctypes.util.find_library("c"))
1740
.if_nametoindex)
1741
except (OSError, AttributeError):
1742
logger.warning("Doing if_nametoindex the hard way")
1743
def if_nametoindex(interface):
1744
"Get an interface index the hard way, i.e. using fcntl()"
1745
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1746
with contextlib.closing(socket.socket()) as s:
1747
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1748
struct.pack(str("16s16x"),
1749
interface))
1750
interface_index = struct.unpack(str("I"),
1751
ifreq[16:20])[0]
1752
return interface_index
1753
return if_nametoindex(interface)
1754
1755
1756
2713
def daemon(nochdir = False, noclose = False):
1757
2714
"""See daemon(3). Standard BSD Unix function.
1758
2715
1766
2723
sys.exit()
1767
2724
if not noclose:
1768
2725
# Close all standard open file descriptors
1769
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1770
2727
if not stat.S_ISCHR(os.fstat(null).st_mode):
1771
2728
raise OSError(errno.ENODEV,
1772
"%s not a character device"
1773
% os.path.devnull)
2729
"{} not a character device"
2730
.format(os.devnull))
1774
2731
os.dup2(null, sys.stdin.fileno())
1775
2732
os.dup2(null, sys.stdout.fileno())
1776
2733
os.dup2(null, sys.stderr.fileno())
1785
2742
1786
2743
parser = argparse.ArgumentParser()
1787
2744
parser.add_argument("-v", "--version", action="version",
1788
version = "%%(prog)s %s" % version,
2745
version = "%(prog)s {}".format(version),
1789
2746
help="show version number and exit")
1790
2747
parser.add_argument("-i", "--interface", metavar="IF",
1791
2748
help="Bind to interface IF")
1797
2754
help="Run self-test")
1798
2755
parser.add_argument("--debug", action="store_true",
1799
2756
help="Debug mode; run in foreground and log"
1800
" to terminal")
2757
" to terminal", default=None)
1801
2758
parser.add_argument("--debuglevel", metavar="LEVEL",
1802
2759
help="Debug level for stdout output")
1803
2760
parser.add_argument("--priority", help="GnuTLS"
1810
2767
" files")
1811
2768
parser.add_argument("--no-dbus", action="store_false",
1812
2769
dest="use_dbus", help="Do not provide D-Bus"
1813
" system bus interface")
2770
" system bus interface", default=None)
1814
2771
parser.add_argument("--no-ipv6", action="store_false",
1815
dest="use_ipv6", help="Do not use IPv6")
2772
dest="use_ipv6", help="Do not use IPv6",
2773
default=None)
2774
parser.add_argument("--no-restore", action="store_false",
2775
dest="restore", help="Do not restore stored"
2776
" state", default=None)
2777
parser.add_argument("--socket", type=int,
2778
help="Specify a file descriptor to a network"
2779
" socket to use instead of creating one")
2780
parser.add_argument("--statedir", metavar="DIR",
2781
help="Directory to save/restore state in")
2782
parser.add_argument("--foreground", action="store_true",
2783
help="Run in foreground", default=None)
2784
parser.add_argument("--no-zeroconf", action="store_false",
2785
dest="zeroconf", help="Do not use Zeroconf",
2786
default=None)
2787
1816
2788
options = parser.parse_args()
1817
2789
1818
2790
if options.check:
1819
2791
import doctest
1820
doctest.testmod()
1821
sys.exit()
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
1822
2794
1823
2795
# Default values for config file for server-global settings
1824
2796
server_defaults = { "interface": "",
1826
2798
"port": "",
1827
2799
"debug": "False",
1828
2800
"priority":
1829
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
1830
2803
"servicename": "Mandos",
1831
2804
"use_dbus": "True",
1832
2805
"use_ipv6": "True",
1833
2806
"debuglevel": "",
1834
}
2807
"restore": "True",
2808
"socket": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2811
"zeroconf": "True",
2812
}
1835
2813
1836
2814
# Parse config file for server-global settings
1837
2815
server_config = configparser.SafeConfigParser(server_defaults)
1838
2816
del server_defaults
1839
server_config.read(os.path.join(options.configdir,
1840
"mandos.conf"))
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1841
2818
# Convert the SafeConfigParser object to a dict
1842
2819
server_settings = server_config.defaults()
1843
2820
# Use the appropriate methods on the non-string config options
1844
for option in ("debug", "use_dbus", "use_ipv6"):
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1845
2822
server_settings[option] = server_config.getboolean("DEFAULT",
1846
2823
option)
1847
2824
if server_settings["port"]:
1848
2825
server_settings["port"] = server_config.getint("DEFAULT",
1849
2826
"port")
2827
if server_settings["socket"]:
2828
server_settings["socket"] = server_config.getint("DEFAULT",
2829
"socket")
2830
# Later, stdin will, and stdout and stderr might, be dup'ed
2831
# over with an opened os.devnull. But we don't want this to
2832
# happen with a supplied network socket.
2833
if 0 <= server_settings["socket"] <= 2:
2834
server_settings["socket"] = os.dup(server_settings
2835
["socket"])
1850
2836
del server_config
1851
2837
1852
2838
# Override the settings from the config file with command line
1853
2839
# options, if set.
1854
2840
for option in ("interface", "address", "port", "debug",
1855
"priority", "servicename", "configdir",
1856
"use_dbus", "use_ipv6", "debuglevel"):
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
1857
2844
value = getattr(options, option)
1858
2845
if value is not None:
1859
2846
server_settings[option] = value
1860
2847
del options
1861
2848
# Force all strings to be unicode
1862
2849
for option in server_settings.keys():
1863
if type(server_settings[option]) is str:
1864
server_settings[option] = unicode(server_settings[option])
2850
if isinstance(server_settings[option], bytes):
2851
server_settings[option] = (server_settings[option]
2852
.decode("utf-8"))
2853
# Force all boolean options to be boolean
2854
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2855
"foreground", "zeroconf"):
2856
server_settings[option] = bool(server_settings[option])
2857
# Debug implies foreground
2858
if server_settings["debug"]:
2859
server_settings["foreground"] = True
1865
2860
# Now we have our good server settings in "server_settings"
1866
2861
1867
2862
##################################################################
1868
2863
2864
if (not server_settings["zeroconf"]
2865
and not (server_settings["port"]
2866
or server_settings["socket"] != "")):
2867
parser.error("Needs port or socket to work without Zeroconf")
2868
1869
2869
# For convenience
1870
2870
debug = server_settings["debug"]
1871
2871
debuglevel = server_settings["debuglevel"]
1872
2872
use_dbus = server_settings["use_dbus"]
1873
2873
use_ipv6 = server_settings["use_ipv6"]
2874
stored_state_path = os.path.join(server_settings["statedir"],
2875
stored_state_file)
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2878
2879
if debug:
2880
initlogger(debug, logging.DEBUG)
2881
else:
2882
if not debuglevel:
2883
initlogger(debug)
2884
else:
2885
level = getattr(logging, debuglevel.upper())
2886
initlogger(debug, level)
1874
2887
1875
2888
if server_settings["servicename"] != "Mandos":
1876
syslogger.setFormatter(logging.Formatter
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
1880
2893
1881
2894
# Parse config file with clients
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1884
"interval": "2m",
1885
"checker": "fping -q -- %%(host)s",
1886
"host": "",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1889
}
1890
client_config = configparser.SafeConfigParser(client_defaults)
2895
client_config = configparser.SafeConfigParser(Client
2896
.client_defaults)
1891
2897
client_config.read(os.path.join(server_settings["configdir"],
1892
2898
"clients.conf"))
1893
2899
1894
2900
global mandos_dbus_service
1895
2901
mandos_dbus_service = None
1896
2902
1897
tcp_server = MandosServer((server_settings["address"],
1898
server_settings["port"]),
1899
ClientHandler,
1900
interface=(server_settings["interface"]
1901
or None),
1902
use_ipv6=use_ipv6,
1903
gnutls_priority=
1904
server_settings["priority"],
1905
use_dbus=use_dbus)
1906
if not debug:
1907
pidfilename = "/var/run/mandos.pid"
2903
socketfd = None
2904
if server_settings["socket"] != "":
2905
socketfd = server_settings["socket"]
2906
tcp_server = MandosServer(
2907
(server_settings["address"], server_settings["port"]),
2908
ClientHandler,
2909
interface=(server_settings["interface"] or None),
2910
use_ipv6=use_ipv6,
2911
gnutls_priority=server_settings["priority"],
2912
use_dbus=use_dbus,
2913
socketfd=socketfd)
2914
if not foreground:
2915
pidfilename = "/run/mandos.pid"
2916
if not os.path.isdir("/run/."):
2917
pidfilename = "/var/run/mandos.pid"
2918
pidfile = None
1908
2919
try:
1909
pidfile = open(pidfilename, "w")
1910
except IOError:
1911
logger.error("Could not open file %r", pidfilename)
2920
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2921
except IOError as e:
2922
logger.error("Could not open file %r", pidfilename,
2923
exc_info=e)
1912
2924
1913
try:
1914
uid = pwd.getpwnam("_mandos").pw_uid
1915
gid = pwd.getpwnam("_mandos").pw_gid
1916
except KeyError:
2925
for name, group in (("_mandos", "_mandos"),
2926
("mandos", "mandos"),
2927
("nobody", "nogroup")):
1917
2928
try:
1918
uid = pwd.getpwnam("mandos").pw_uid
1919
gid = pwd.getpwnam("mandos").pw_gid
2929
uid = pwd.getpwnam(name).pw_uid
2930
gid = pwd.getpwnam(group).pw_gid
2931
break
1920
2932
except KeyError:
1921
try:
1922
uid = pwd.getpwnam("nobody").pw_uid
1923
gid = pwd.getpwnam("nobody").pw_gid
1924
except KeyError:
1925
uid = 65534
1926
gid = 65534
2933
continue
2934
else:
2935
uid = 65534
2936
gid = 65534
1927
2937
try:
1928
2938
os.setgid(gid)
1929
2939
os.setuid(uid)
1930
2940
except OSError as error:
1931
if error[0] != errno.EPERM:
1932
raise error
1933
1934
if not debug and not debuglevel:
1935
syslogger.setLevel(logging.WARNING)
1936
console.setLevel(logging.WARNING)
1937
if debuglevel:
1938
level = getattr(logging, debuglevel.upper())
1939
syslogger.setLevel(level)
1940
console.setLevel(level)
2941
if error.errno != errno.EPERM:
2942
raise
1941
2943
1942
2944
if debug:
1943
2945
# Enable all possible GnuTLS debugging
1944
2946
1945
2947
# "Use a log level over 10 to enable all debugging options."
1946
2948
# - GnuTLS manual
1947
gnutls.library.functions.gnutls_global_set_log_level(11)
2949
gnutls.global_set_log_level(11)
1948
2950
1949
@gnutls.library.types.gnutls_log_func
2951
@gnutls.log_func
1950
2952
def debug_gnutls(level, string):
1951
2953
logger.debug("GnuTLS: %s", string[:-1])
1952
2954
1953
(gnutls.library.functions
1954
.gnutls_global_set_log_function(debug_gnutls))
2955
gnutls.global_set_log_function(debug_gnutls)
1955
2956
1956
2957
# Redirect stdin so all checkers get /dev/null
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2958
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1958
2959
os.dup2(null, sys.stdin.fileno())
1959
2960
if null > 2:
1960
2961
os.close(null)
1961
else:
1962
# No console logging
1963
logger.removeHandler(console)
1964
2962
1965
2963
# Need to fork before connecting to D-Bus
1966
if not debug:
2964
if not foreground:
1967
2965
# Close all input and output, do double fork, etc.
1968
2966
daemon()
1969
2967
2968
# multiprocessing will use threads, so before we use gobject we
2969
# need to inform gobject that threads will be used.
2970
gobject.threads_init()
2971
1970
2972
global main_loop
1971
2973
# From the Avahi example code
1972
DBusGMainLoop(set_as_default=True )
2974
DBusGMainLoop(set_as_default=True)
1973
2975
main_loop = gobject.MainLoop()
1974
2976
bus = dbus.SystemBus()
1975
2977
# End of Avahi example code
1976
2978
if use_dbus:
1977
2979
try:
1978
2980
bus_name = dbus.service.BusName("se.recompile.Mandos",
1979
bus, do_not_queue=True)
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
1982
except dbus.exceptions.NameExistsException as e:
1983
logger.error(unicode(e) + ", disabling D-Bus")
2981
bus,
2982
do_not_queue=True)
2983
old_bus_name = dbus.service.BusName(
2984
"se.bsnet.fukt.Mandos", bus,
2985
do_not_queue=True)
2986
except dbus.exceptions.DBusException as e:
2987
logger.error("Disabling D-Bus:", exc_info=e)
1984
2988
use_dbus = False
1985
2989
server_settings["use_dbus"] = False
1986
2990
tcp_server.use_dbus = False
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
2991
if zeroconf:
2992
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2993
service = AvahiServiceToSyslog(
2994
name = server_settings["servicename"],
2995
servicetype = "_mandos._tcp",
2996
protocol = protocol,
2997
bus = bus)
2998
if server_settings["interface"]:
2999
service.interface = if_nametoindex(
3000
server_settings["interface"].encode("utf-8"))
1994
3001
1995
3002
global multiprocessing_manager
1996
3003
multiprocessing_manager = multiprocessing.Manager()
1997
3004
1998
3005
client_class = Client
1999
3006
if use_dbus:
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2006
}
2007
for name, value in config.items(section):
3007
client_class = functools.partial(ClientDBus, bus = bus)
3008
3009
client_settings = Client.config_parser(client_config)
3010
old_client_settings = {}
3011
clients_data = {}
3012
3013
# This is used to redirect stdout and stderr for checker processes
3014
global wnull
3015
wnull = open(os.devnull, "w") # A writable /dev/null
3016
# Only used if server is running in foreground but not in debug
3017
# mode
3018
if debug or not foreground:
3019
wnull.close()
3020
3021
# Get client data and settings from last running state.
3022
if server_settings["restore"]:
3023
try:
3024
with open(stored_state_path, "rb") as stored_state:
3025
clients_data, old_client_settings = pickle.load(
3026
stored_state)
3027
os.remove(stored_state_path)
3028
except IOError as e:
3029
if e.errno == errno.ENOENT:
3030
logger.warning("Could not load persistent state:"
3031
" {}".format(os.strerror(e.errno)))
3032
else:
3033
logger.critical("Could not load persistent state:",
3034
exc_info=e)
3035
raise
3036
except EOFError as e:
3037
logger.warning("Could not load persistent state: "
3038
"EOFError:",
3039
exc_info=e)
3040
3041
with PGPEngine() as pgp:
3042
for client_name, client in clients_data.items():
3043
# Skip removed clients
3044
if client_name not in client_settings:
3045
continue
3046
3047
# Decide which value to use after restoring saved state.
3048
# We have three different values: Old config file,
3049
# new config file, and saved state.
3050
# New config value takes precedence if it differs from old
3051
# config value, otherwise use saved state.
3052
for name, value in client_settings[client_name].items():
3053
try:
3054
# For each value in new config, check if it
3055
# differs from the old config value (Except for
3056
# the "secret" attribute)
3057
if (name != "secret"
3058
and (value !=
3059
old_client_settings[client_name][name])):
3060
client[name] = value
3061
except KeyError:
3062
pass
3063
3064
# Clients who has passed its expire date can still be
3065
# enabled if its last checker was successful. A Client
3066
# whose checker succeeded before we stored its state is
3067
# assumed to have successfully run all checkers during
3068
# downtime.
3069
if client["enabled"]:
3070
if datetime.datetime.utcnow() >= client["expires"]:
3071
if not client["last_checked_ok"]:
3072
logger.warning(
3073
"disabling client {} - Client never "
3074
"performed a successful checker".format(
3075
client_name))
3076
client["enabled"] = False
3077
elif client["last_checker_status"] != 0:
3078
logger.warning(
3079
"disabling client {} - Client last"
3080
" checker failed with error code"
3081
" {}".format(
3082
client_name,
3083
client["last_checker_status"]))
3084
client["enabled"] = False
3085
else:
3086
client["expires"] = (
3087
datetime.datetime.utcnow()
3088
+ client["timeout"])
3089
logger.debug("Last checker succeeded,"
3090
" keeping {} enabled".format(
3091
client_name))
2008
3092
try:
2009
yield (name, special_settings[name]())
2010
except KeyError:
2011
yield (name, value)
2012
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
3093
client["secret"] = pgp.decrypt(
3094
client["encrypted_secret"],
3095
client_settings[client_name]["secret"])
3096
except PGPError:
3097
# If decryption fails, we use secret from new settings
3098
logger.debug("Failed to decrypt {} old secret".format(
3099
client_name))
3100
client["secret"] = (client_settings[client_name]
3101
["secret"])
3102
3103
# Add/remove clients based on new changes made to config
3104
for client_name in (set(old_client_settings)
3105
- set(client_settings)):
3106
del clients_data[client_name]
3107
for client_name in (set(client_settings)
3108
- set(old_client_settings)):
3109
clients_data[client_name] = client_settings[client_name]
3110
3111
# Create all client objects
3112
for client_name, client in clients_data.items():
3113
tcp_server.clients[client_name] = client_class(
3114
name = client_name,
3115
settings = client,
3116
server_settings = server_settings)
3117
2018
3118
if not tcp_server.clients:
2019
3119
logger.warning("No clients defined")
2020
2021
if not debug:
2022
try:
2023
with pidfile:
2024
pid = os.getpid()
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2026
del pidfile
2027
except IOError:
2028
logger.error("Could not write to file %r with PID %d",
2029
pidfilename, pid)
2030
except NameError:
2031
# "pidfile" was never created
2032
pass
3120
3121
if not foreground:
3122
if pidfile is not None:
3123
pid = os.getpid()
3124
try:
3125
with pidfile:
3126
print(pid, file=pidfile)
3127
except IOError:
3128
logger.error("Could not write to file %r with PID %d",
3129
pidfilename, pid)
3130
del pidfile
2033
3131
del pidfilename
2034
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2036
3132
2037
3133
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2038
3134
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2039
3135
2040
3136
if use_dbus:
2041
class MandosDBusService(dbus.service.Object):
3137
3138
@alternate_dbus_interfaces(
3139
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3140
class MandosDBusService(DBusObjectWithObjectManager):
2042
3141
"""A D-Bus proxy object"""
3142
2043
3143
def __init__(self):
2044
3144
dbus.service.Object.__init__(self, bus, "/")
3145
2045
3146
_interface = "se.recompile.Mandos"
2046
3147
2047
3148
@dbus.service.signal(_interface, signature="o")
2054
3155
"D-Bus signal"
2055
3156
pass
2056
3157
3158
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3159
"true"})
2057
3160
@dbus.service.signal(_interface, signature="os")
2058
3161
def ClientRemoved(self, objpath, name):
2059
3162
"D-Bus signal"
2060
3163
pass
2061
3164
3165
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3166
"true"})
2062
3167
@dbus.service.method(_interface, out_signature="ao")
2063
3168
def GetAllClients(self):
2064
3169
"D-Bus method"
2065
return dbus.Array(c.dbus_object_path
2066
for c in tcp_server.clients)
3170
return dbus.Array(c.dbus_object_path for c in
3171
tcp_server.clients.itervalues())
2067
3172
3173
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3174
"true"})
2068
3175
@dbus.service.method(_interface,
2069
3176
out_signature="a{oa{sv}}")
2070
3177
def GetAllClientsWithProperties(self):
2071
3178
"D-Bus method"
2072
3179
return dbus.Dictionary(
2073
((c.dbus_object_path, c.GetAll(""))
2074
for c in tcp_server.clients),
3180
{ c.dbus_object_path: c.GetAll(
3181
"se.recompile.Mandos.Client")
3182
for c in tcp_server.clients.itervalues() },
2075
3183
signature="oa{sv}")
2076
3184
2077
3185
@dbus.service.method(_interface, in_signature="o")
2078
3186
def RemoveClient(self, object_path):
2079
3187
"D-Bus method"
2080
for c in tcp_server.clients:
3188
for c in tcp_server.clients.itervalues():
2081
3189
if c.dbus_object_path == object_path:
2082
tcp_server.clients.remove(c)
3190
del tcp_server.clients[c.name]
2083
3191
c.remove_from_connection()
2084
# Don't signal anything except ClientRemoved
3192
# Don't signal the disabling
2085
3193
c.disable(quiet=True)
2086
# Emit D-Bus signal
2087
self.ClientRemoved(object_path, c.name)
3194
# Emit D-Bus signal for removal
3195
self.client_removed_signal(c)
2088
3196
return
2089
3197
raise KeyError(object_path)
2090
3198
2091
3199
del _interface
3200
3201
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3202
out_signature = "a{oa{sa{sv}}}")
3203
def GetManagedObjects(self):
3204
"""D-Bus method"""
3205
return dbus.Dictionary(
3206
{ client.dbus_object_path:
3207
dbus.Dictionary(
3208
{ interface: client.GetAll(interface)
3209
for interface in
3210
client._get_all_interface_names()})
3211
for client in tcp_server.clients.values()})
3212
3213
def client_added_signal(self, client):
3214
"""Send the new standard signal and the old signal"""
3215
if use_dbus:
3216
# New standard signal
3217
self.InterfacesAdded(
3218
client.dbus_object_path,
3219
dbus.Dictionary(
3220
{ interface: client.GetAll(interface)
3221
for interface in
3222
client._get_all_interface_names()}))
3223
# Old signal
3224
self.ClientAdded(client.dbus_object_path)
3225
3226
def client_removed_signal(self, client):
3227
"""Send the new standard signal and the old signal"""
3228
if use_dbus:
3229
# New standard signal
3230
self.InterfacesRemoved(
3231
client.dbus_object_path,
3232
client._get_all_interface_names())
3233
# Old signal
3234
self.ClientRemoved(client.dbus_object_path,
3235
client.name)
2092
3236
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
3237
mandos_dbus_service = MandosDBusService()
2096
3238
2097
3239
def cleanup():
2098
3240
"Cleanup function; run on exit"
2099
service.cleanup()
2100
3241
if zeroconf:
3242
service.cleanup()
3243
3244
multiprocessing.active_children()
3245
wnull.close()
3246
if not (tcp_server.clients or client_settings):
3247
return
3248
3249
# Store client before exiting. Secrets are encrypted with key
3250
# based on what config file has. If config file is
3251
# removed/edited, old secret will thus be unrecovable.
3252
clients = {}
3253
with PGPEngine() as pgp:
3254
for client in tcp_server.clients.itervalues():
3255
key = client_settings[client.name]["secret"]
3256
client.encrypted_secret = pgp.encrypt(client.secret,
3257
key)
3258
client_dict = {}
3259
3260
# A list of attributes that can not be pickled
3261
# + secret.
3262
exclude = { "bus", "changedstate", "secret",
3263
"checker", "server_settings" }
3264
for name, typ in inspect.getmembers(dbus.service
3265
.Object):
3266
exclude.add(name)
3267
3268
client_dict["encrypted_secret"] = (client
3269
.encrypted_secret)
3270
for attr in client.client_structure:
3271
if attr not in exclude:
3272
client_dict[attr] = getattr(client, attr)
3273
3274
clients[client.name] = client_dict
3275
del client_settings[client.name]["secret"]
3276
3277
try:
3278
with tempfile.NamedTemporaryFile(
3279
mode='wb',
3280
suffix=".pickle",
3281
prefix='clients-',
3282
dir=os.path.dirname(stored_state_path),
3283
delete=False) as stored_state:
3284
pickle.dump((clients, client_settings), stored_state)
3285
tempname = stored_state.name
3286
os.rename(tempname, stored_state_path)
3287
except (IOError, OSError) as e:
3288
if not debug:
3289
try:
3290
os.remove(tempname)
3291
except NameError:
3292
pass
3293
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3294
logger.warning("Could not save persistent state: {}"
3295
.format(os.strerror(e.errno)))
3296
else:
3297
logger.warning("Could not save persistent state:",
3298
exc_info=e)
3299
raise
3300
3301
# Delete all clients, and settings from config
2101
3302
while tcp_server.clients:
2102
client = tcp_server.clients.pop()
3303
name, client = tcp_server.clients.popitem()
2103
3304
if use_dbus:
2104
3305
client.remove_from_connection()
2105
client.disable_hook = None
2106
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2107
3307
client.disable(quiet=True)
3308
# Emit D-Bus signal for removal
2108
3309
if use_dbus:
2109
# Emit D-Bus signal
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2111
client.name)
3310
mandos_dbus_service.client_removed_signal(client)
3311
client_settings.clear()
2112
3312
2113
3313
atexit.register(cleanup)
2114
3314
2115
for client in tcp_server.clients:
3315
for client in tcp_server.clients.itervalues():
2116
3316
if use_dbus:
2117
# Emit D-Bus signal
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2119
client.enable()
3317
# Emit D-Bus signal for adding
3318
mandos_dbus_service.client_added_signal(client)
3319
# Need to initiate checking of clients
3320
if client.enabled:
3321
client.init_checker()
2120
3322
2121
3323
tcp_server.enable()
2122
3324
tcp_server.server_activate()
2123
3325
2124
3326
# Find out what port we got
2125
service.port = tcp_server.socket.getsockname()[1]
3327
if zeroconf:
3328
service.port = tcp_server.socket.getsockname()[1]
2126
3329
if use_ipv6:
2127
3330
logger.info("Now listening on address %r, port %d,"
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
3331
" flowinfo %d, scope_id %d",
3332
*tcp_server.socket.getsockname())
2130
3333
else: # IPv4
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
3334
logger.info("Now listening on address %r, port %d",
3335
*tcp_server.socket.getsockname())
2133
3336
2134
3337
#service.interface = tcp_server.socket.getsockname()[3]
2135
3338
2136
3339
try:
2137
# From the Avahi example code
2138
try:
2139
service.activate()
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2142
cleanup()
2143
sys.exit(1)
2144
# End of Avahi example code
3340
if zeroconf:
3341
# From the Avahi example code
3342
try:
3343
service.activate()
3344
except dbus.exceptions.DBusException as error:
3345
logger.critical("D-Bus Exception", exc_info=error)
3346
cleanup()
3347
sys.exit(1)
3348
# End of Avahi example code
2145
3349
2146
3350
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2147
3351
lambda *args, **kwargs:
2151
3355
logger.debug("Starting main loop")
2152
3356
main_loop.run()
2153
3357
except AvahiError as error:
2154
logger.critical("AvahiError: %s", error)
3358
logger.critical("Avahi Error", exc_info=error)
2155
3359
cleanup()
2156
3360
sys.exit(1)
2157
3361
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0