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- Committer: Teddy Hogeborn
- Date: 2016-03-05 20:11:10 UTC
- Revision ID: teddy@recompile.se-20160305201110-6f7nws77k1h96e8k
errno is of type int, not error_t
* plugins.d/mandos-client.c (raise_privileges,
raise_privileges_permanently, lower_privileges,
lower_privileges_permanently, bring_up_interface,
take_down_interface, ): Change return type and all errno-containing
variables to type "int".
(get_flags): Change all errno-containing variables to type "int".
(main): Change all errno-containing variables to type "int", except
for values which are explicitly of type error_t.
* plugins.d/mandos-client.c (raise_privileges,
raise_privileges_permanently, lower_privileges,
lower_privileges_permanently, bring_up_interface,
take_down_interface, ): Change return type and all errno-containing
variables to type "int".
(get_flags): Change all errno-containing variables to type "int".
(main): Change all errno-containing variables to type "int", except
for values which are explicitly of type error_t.
- files added:
- debian/mandos-client.examples
- debian/upstream
- 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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
66
71
import binascii
67
72
import tempfile
73
import itertools
74
import collections
75
import codecs
68
76
69
77
import dbus
70
78
import dbus.service
71
import gobject
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
72
83
import avahi
73
84
from dbus.mainloop.glib import DBusGMainLoop
74
85
import ctypes
75
86
import ctypes.util
76
87
import xml.dom.minidom
77
88
import inspect
78
import GnuPGInterface
79
89
80
90
try:
81
91
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
95
except ImportError:
86
96
SO_BINDTODEVICE = None
87
97
88
version = "1.5.0"
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.3"
89
102
stored_state_file = "clients.pickle"
90
103
91
104
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
105
syslogger = None
95
106
96
107
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
100
110
except (OSError, AttributeError):
111
101
112
def if_nametoindex(interface):
102
113
"Get an interface index the hard way, i.e. using fcntl()"
103
114
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
115
with contextlib.closing(socket.socket()) as s:
105
116
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
119
return interface_index
111
120
112
121
113
122
def initlogger(debug, level=logging.WARNING):
114
123
"""init logger and add loglevel"""
115
124
125
global syslogger
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
116
129
syslogger.setFormatter(logging.Formatter
117
130
('Mandos [%(process)d]: %(levelname)s:'
118
131
' %(message)s'))
135
148
136
149
class PGPEngine(object):
137
150
"""A simple class for OpenPGP symmetric encryption & decryption"""
151
138
152
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
153
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
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']
147
170
148
171
def __enter__(self):
149
172
return self
150
173
151
def __exit__ (self, exc_type, exc_value, traceback):
174
def __exit__(self, exc_type, exc_value, traceback):
152
175
self._cleanup()
153
176
return False
154
177
171
194
def password_encode(self, password):
172
195
# Passphrase can not be empty and can not contain newlines or
173
196
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
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
175
204
176
205
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
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)
191
221
return ciphertext
192
222
193
223
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
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)
208
239
return decrypted_plaintext
209
240
210
241
211
212
242
class AvahiError(Exception):
213
243
def __init__(self, value, *args, **kwargs):
214
244
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
218
248
219
249
class AvahiServiceError(AvahiError):
220
250
pass
221
251
252
222
253
class AvahiGroupError(AvahiError):
223
254
pass
224
255
231
262
Used to optionally bind to the specified interface.
232
263
name: string; Example: 'Mandos'
233
264
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
265
See <https://www.iana.org/assignments/service-names-port-numbers>
235
266
port: integer; what port to announce
236
267
TXT: list of strings; TXT record for the service
237
268
domain: string; Domain to publish on, default to .local if empty.
243
274
server: D-Bus Server
244
275
bus: dbus.SystemBus()
245
276
"""
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
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):
250
289
self.interface = interface
251
290
self.name = name
252
291
self.type = servicetype
261
300
self.server = None
262
301
self.bus = bus
263
302
self.entry_group_state_changed_match = None
264
def rename(self):
303
304
def rename(self, remove=True):
265
305
"""Derived from the Avahi example code"""
266
306
if self.rename_count >= self.max_renames:
267
307
logger.critical("No suitable Zeroconf service name found"
268
308
" after %i retries, exiting.",
269
309
self.rename_count)
270
310
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
313
self.rename_count += 1
273
314
logger.info("Changing Zeroconf service name to %r ...",
274
315
self.name)
275
self.remove()
316
if remove:
317
self.remove()
276
318
try:
277
319
self.add()
278
320
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
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
283
330
def remove(self):
284
331
"""Derived from the Avahi example code"""
285
332
if self.entry_group_state_changed_match is not None:
287
334
self.entry_group_state_changed_match = None
288
335
if self.group is not None:
289
336
self.group.Reset()
337
290
338
def add(self):
291
339
"""Derived from the Avahi example code"""
292
340
self.remove()
309
357
dbus.UInt16(self.port),
310
358
avahi.string_array_to_txt_array(self.TXT))
311
359
self.group.Commit()
360
312
361
def entry_group_state_changed(self, state, error):
313
362
"""Derived from the Avahi example code"""
314
363
logger.debug("Avahi entry group state change: %i", state)
320
369
self.rename()
321
370
elif state == avahi.ENTRY_GROUP_FAILURE:
322
371
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
372
str(error))
373
raise AvahiGroupError("State changed: {!s}".format(error))
374
326
375
def cleanup(self):
327
376
"""Derived from the Avahi example code"""
328
377
if self.group is not None:
333
382
pass
334
383
self.group = None
335
384
self.remove()
385
336
386
def server_state_changed(self, state, error=None):
337
387
"""Derived from the Avahi example code"""
338
388
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"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
}
346
395
if state in bad_states:
347
396
if bad_states[state] is not None:
348
397
if error is None:
351
400
logger.error(bad_states[state] + ": %r", error)
352
401
self.cleanup()
353
402
elif state == avahi.SERVER_RUNNING:
354
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)
355
415
else:
356
416
if error is None:
357
417
logger.debug("Unknown state: %r", state)
358
418
else:
359
419
logger.debug("Unknown state: %r: %r", state, error)
420
360
421
def activate(self):
361
422
"""Derived from the Avahi example code"""
362
423
if self.server is None:
366
427
follow_name_owner_changes=True),
367
428
avahi.DBUS_INTERFACE_SERVER)
368
429
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
430
self.server_state_changed)
370
431
self.server_state_changed(self.server.GetState())
371
432
433
372
434
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
435
def rename(self, *args, **kwargs):
374
436
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
440
.format(self.name)))
380
441
return ret
381
442
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
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
388
708
class Client(object):
389
709
"""A representation of a client host served by this server.
390
710
415
735
last_checked_ok: datetime.datetime(); (UTC) or None
416
736
last_checker_status: integer between 0 and 255 reflecting exit
417
737
status of last checker. -1 reflects crashed
418
checker, or None.
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
419
741
last_enabled: datetime.datetime(); (UTC) or None
420
742
name: string; from the config file, used in log messages and
421
743
D-Bus identifiers
422
744
secret: bytestring; sent verbatim (over TLS) to client
423
745
timeout: datetime.timedelta(); How long from last_checked_ok
424
746
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
747
extended_timeout: extra long timeout when secret has been sent
426
748
runtime_expansions: Allowed attributes for runtime expansion.
427
749
expires: datetime.datetime(); time (UTC) when a client will be
428
750
disabled, or None
751
server_settings: The server_settings dict from main()
429
752
"""
430
753
431
754
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
434
758
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
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
461
771
@staticmethod
462
772
def config_parser(config):
463
773
"""Construct a new dict of client settings of this form:
478
788
client["enabled"] = config.getboolean(client_name,
479
789
"enabled")
480
790
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
481
794
client["fingerprint"] = (section["fingerprint"].upper()
482
795
.replace(" ", ""))
483
796
if "secret" in section:
488
801
"rb") as secfile:
489
802
client["secret"] = secfile.read()
490
803
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
804
raise TypeError("No secret or secfile for section {}"
805
.format(section))
493
806
client["timeout"] = string_to_delta(section["timeout"])
494
807
client["extended_timeout"] = string_to_delta(
495
808
section["extended_timeout"])
501
814
client["checker_command"] = section["checker"]
502
815
client["last_approval_request"] = None
503
816
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
817
client["last_checker_status"] = -2
505
818
506
819
return settings
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
820
821
def __init__(self, settings, name = None, server_settings=None):
513
822
self.name = name
823
if server_settings is None:
824
server_settings = {}
825
self.server_settings = server_settings
514
826
# adding all client settings
515
for setting, value in settings.iteritems():
827
for setting, value in settings.items():
516
828
setattr(self, setting, value)
517
829
518
830
if self.enabled:
524
836
else:
525
837
self.last_enabled = None
526
838
self.expires = None
527
839
528
840
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
532
841
logger.debug(" Fingerprint: %s", self.fingerprint)
533
842
self.created = settings.get("created",
534
843
datetime.datetime.utcnow())
535
844
536
845
# attributes specific for this server instance
537
846
self.checker = None
538
847
self.checker_initiator_tag = None
541
850
self.current_checker_command = None
542
851
self.approved = None
543
852
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
549
857
if not attr.startswith("_")]
550
858
self.client_structure.append("client_structure")
551
859
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
556
862
if not name.startswith("_"):
557
863
self.client_structure.append(name)
558
864
566
872
if getattr(self, "enabled", False):
567
873
# Already enabled
568
874
return
569
self.send_changedstate()
570
875
self.expires = datetime.datetime.utcnow() + self.timeout
571
876
self.enabled = True
572
877
self.last_enabled = datetime.datetime.utcnow()
573
878
self.init_checker()
879
self.send_changedstate()
574
880
575
881
def disable(self, quiet=True):
576
882
"""Disable this client."""
577
883
if not getattr(self, "enabled", False):
578
884
return False
579
885
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
886
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
887
if getattr(self, "disable_initiator_tag", None) is not None:
584
888
gobject.source_remove(self.disable_initiator_tag)
585
889
self.disable_initiator_tag = None
586
890
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
891
if getattr(self, "checker_initiator_tag", None) is not None:
588
892
gobject.source_remove(self.checker_initiator_tag)
589
893
self.checker_initiator_tag = None
590
894
self.stop_checker()
591
895
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
592
898
# Do not run this again if called by a gobject.timeout_add
593
899
return False
594
900
598
904
def init_checker(self):
599
905
# Schedule a new checker to be started an 'interval' from now,
600
906
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
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)
604
912
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
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)
608
917
# Also start a new checker *right now*.
609
918
self.start_checker()
610
919
611
def checker_callback(self, pid, condition, command):
920
def checker_callback(self, source, condition, connection,
921
command):
612
922
"""The checker has completed, so take appropriate actions."""
613
923
self.checker_callback_tag = None
614
924
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
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
617
932
if self.last_checker_status == 0:
618
933
logger.info("Checker for %(name)s succeeded",
619
934
vars(self))
620
935
self.checked_ok()
621
936
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
937
logger.info("Checker for %(name)s failed", vars(self))
624
938
else:
625
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
626
941
logger.warning("Checker for %(name)s crashed?",
627
942
vars(self))
628
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
631
632
This should only be called when the client has been seen,
633
alive and well.
634
"""
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."""
635
954
if timeout is None:
636
955
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
956
if self.disable_initiator_tag is not None:
639
957
gobject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
640
959
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
960
self.disable_initiator_tag = gobject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
644
962
self.expires = datetime.datetime.utcnow() + timeout
645
963
646
964
def need_approval(self):
652
970
If a checker already exists, leave it running and do
653
971
nothing."""
654
972
# The reason for not killing a running checker is that if we
655
# did that, then if a checker (for some reason) started
656
# running slowly and taking more than 'interval' time, the
657
# client would inevitably timeout, since no checker would get
658
# 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
659
977
# checkers alone, the checker would have to take more time
660
978
# than 'timeout' for the client to be disabled, which is as it
661
979
# should be.
662
980
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
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
676
985
# Start a new checker if needed
677
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 }
678
991
try:
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
681
except TypeError:
682
# Escape attributes for the shell
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
691
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
696
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
697
998
self.current_checker_command = command
698
try:
699
logger.info("Starting checker %r for %s",
700
command, self.name)
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
self.checker = subprocess.Popen(command,
706
close_fds=True,
707
shell=True, cwd="/")
708
self.checker_callback_tag = (gobject.child_watch_add
709
(self.checker.pid,
710
self.checker_callback,
711
data=command))
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
720
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)
721
1024
# Re-run this periodically if run by gobject.timeout_add
722
1025
return True
723
1026
729
1032
if getattr(self, "checker", None) is None:
730
1033
return
731
1034
logger.debug("Stopping checker for %(name)s", vars(self))
732
try:
733
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
735
#if self.checker.poll() is None:
736
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
738
if error.errno != errno.ESRCH: # No such process
739
raise
1035
self.checker.terminate()
740
1036
self.checker = None
741
1037
742
1038
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
745
1043
"""Decorators for marking methods of a DBusObjectWithProperties to
746
1044
become properties on the D-Bus.
747
1045
756
1054
# "Set" method, so we fail early here:
757
1055
if byte_arrays and signature != "ay":
758
1056
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
1057
" signature {!r}".format(signature))
1058
760
1059
def decorator(func):
761
1060
func._dbus_is_property = True
762
1061
func._dbus_interface = dbus_interface
767
1066
func._dbus_name = func._dbus_name[:-14]
768
1067
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
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
770
1113
return decorator
771
1114
772
1115
773
1116
class DBusPropertyException(dbus.exceptions.DBusException):
774
1117
"""A base class for D-Bus property-related exceptions
775
1118
"""
776
def __unicode__(self):
777
return unicode(str(self))
1119
pass
778
1120
779
1121
780
1122
class DBusPropertyAccessException(DBusPropertyException):
789
1131
pass
790
1132
791
1133
792
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):
793
1224
"""A D-Bus object with properties.
794
1225
795
1226
Classes inheriting from this can use the dbus_service_property
797
1228
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
1229
"""
799
1230
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
812
1231
def _get_dbus_property(self, interface_name, property_name):
813
1232
"""Returns a bound method if one exists which is a D-Bus
814
1233
property with the specified name and interface.
815
1234
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
819
1238
if (value._dbus_name == property_name
820
1239
and value._dbus_interface == interface_name):
821
1240
return value.__get__(self)
822
1241
823
1242
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@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",
829
1257
out_signature="v")
830
1258
def Get(self, interface_name, property_name):
831
1259
"""Standard D-Bus property Get() method, see D-Bus standard.
849
1277
# The byte_arrays option is not supported yet on
850
1278
# signatures other than "ay".
851
1279
if prop._dbus_signature != "ay":
852
raise ValueError
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
853
1283
value = dbus.ByteArray(b''.join(chr(byte)
854
1284
for byte in value))
855
1285
prop(value)
856
1286
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1288
in_signature="s",
858
1289
out_signature="a{sv}")
859
1290
def GetAll(self, interface_name):
860
1291
"""Standard D-Bus property GetAll() method, see D-Bus
863
1294
Note: Will not include properties with access="write".
864
1295
"""
865
1296
properties = {}
866
for name, prop in self._get_all_dbus_properties():
1297
for name, prop in self._get_all_dbus_things("property"):
867
1298
if (interface_name
868
1299
and interface_name != prop._dbus_interface):
869
1300
# Interface non-empty but did not match
875
1306
if not hasattr(value, "variant_level"):
876
1307
properties[name] = value
877
1308
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
880
1311
return dbus.Dictionary(properties, signature="sv")
881
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
1320
882
1321
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
1322
out_signature="s",
884
1323
path_keyword='object_path',
885
1324
connection_keyword='connection')
886
1325
def Introspect(self, object_path, connection):
887
"""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.
888
1329
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1331
object_path,
1332
connection)
891
1333
try:
892
1334
document = xml.dom.minidom.parseString(xmlstring)
1335
893
1336
def make_tag(document, name, prop):
894
1337
e = document.createElement("property")
895
1338
e.setAttribute("name", name)
896
1339
e.setAttribute("type", prop._dbus_signature)
897
1340
e.setAttribute("access", prop._dbus_access)
898
1341
return e
1342
899
1343
for if_tag in document.getElementsByTagName("interface"):
1344
# Add property tags
900
1345
for tag in (make_tag(document, name, prop)
901
1346
for name, prop
902
in self._get_all_dbus_properties()
1347
in self._get_all_dbus_things("property")
903
1348
if prop._dbus_interface
904
1349
== if_tag.getAttribute("name")):
905
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)
906
1367
# Add the names to the return values for the
907
1368
# "org.freedesktop.DBus.Properties" methods
908
1369
if (if_tag.getAttribute("name")
923
1384
except (AttributeError, xml.dom.DOMException,
924
1385
xml.parsers.expat.ExpatError) as error:
925
1386
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
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):
931
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
1461
if dt is None:
933
1462
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
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).
942
1488
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
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):
950
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
951
1498
# with the wrong interface name
952
1499
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
955
1502
continue
956
1503
# Create an alternate D-Bus interface name based on
957
1504
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
961
1508
# Is this a D-Bus signal?
962
1509
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
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(
966
1514
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
1515
attribute.__closure__))
1516
["func"].cell_contents)
1517
else:
1518
nonmethod_func = attribute
969
1519
# Create a new, but exactly alike, function
970
1520
# object, and decorate it to be a new D-Bus signal
971
1521
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
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
981
1545
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# 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
984
1549
def fixscope(func1, func2):
985
1550
"""This function is a scope container to pass
986
1551
func1 and func2 to the "call_both" function
987
1552
outside of its arguments"""
1553
1554
@functools.wraps(func2)
988
1555
def call_both(*args, **kwargs):
989
1556
"""This function will emit two D-Bus
990
1557
signals by calling func1 and func2"""
991
1558
func1(*args, **kwargs)
992
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
993
1565
return call_both
994
1566
# Create the "call_both" function and add it to
995
1567
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
1568
attr[attrname] = fixscope(attribute, new_function)
998
1569
# Is this a D-Bus method?
999
1570
elif getattr(attribute, "_dbus_is_method", False):
1000
1571
# Create a new, but exactly alike, function
1001
1572
# object. Decorate it to be a new D-Bus method
1002
1573
# with the alternate D-Bus interface name. Add it
1003
1574
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
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
1014
1591
# Is this a D-Bus property?
1015
1592
elif getattr(attribute, "_dbus_is_property", False):
1016
1593
# Create a new, but exactly alike, function
1017
1594
# object, and decorate it to be a new D-Bus
1018
1595
# property with the alternate D-Bus interface
1019
1596
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
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"})
1036
1654
class ClientDBus(Client, DBusObjectWithProperties):
1037
1655
"""A Client class using D-Bus
1038
1656
1042
1660
"""
1043
1661
1044
1662
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1663
+ ("dbus_object_path", ))
1664
1665
_interface = "se.recompile.Mandos.Client"
1046
1666
1047
1667
# dbus.service.Object doesn't use super(), so we can't either.
1048
1668
1049
1669
def __init__(self, bus = None, *args, **kwargs):
1050
1670
self.bus = bus
1051
1671
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1055
1672
# Only now, when this client is initialized, can it show up on
1056
1673
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1674
client_object_name = str(self.name).translate(
1058
1675
{ord("."): ord("_"),
1059
1676
ord("-"): ord("_")})
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
1062
1679
DBusObjectWithProperties.__init__(self, self.bus,
1063
1680
self.dbus_object_path)
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
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):
1068
1687
""" Modify a variable so that it's a property which announces
1069
1688
its changes to DBus.
1070
1689
1075
1694
to the D-Bus. Default: no transform
1076
1695
variant_level: D-Bus variant level. Default: 1
1077
1696
"""
1078
attrname = "_{0}".format(dbus_name)
1697
attrname = "_{}".format(dbus_name)
1698
1079
1699
def setter(self, value):
1080
1700
if hasattr(self, "dbus_object_path"):
1081
1701
if (not hasattr(self, attrname) or
1082
1702
type_func(getattr(self, attrname, None))
1083
1703
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_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())
1089
1719
setattr(self, attrname, value)
1090
1720
1091
1721
return property(lambda self: getattr(self, attrname), setter)
1092
1722
1093
1094
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
1725
"ApprovalPending",
1098
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
1729
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
1104
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
1734
"LastCheckedOK")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1106
1737
last_approval_request = notifychangeproperty(
1107
1738
datetime_to_dbus, "LastApprovalRequest")
1108
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
1740
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
1114
1744
approval_duration = notifychangeproperty(
1115
1745
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1746
type_func = lambda td: td.total_seconds() * 1000)
1117
1747
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
1121
1751
extended_timeout = notifychangeproperty(
1122
1752
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
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)
1128
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
1129
1760
1130
1761
del notifychangeproperty
1131
1762
1138
1769
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
1770
Client.__del__(self, *args, **kwargs)
1140
1771
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
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:
1147
1779
# Emit D-Bus signal
1148
1780
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
1150
1783
dbus.String(command))
1151
1784
else:
1152
1785
# Emit D-Bus signal
1153
1786
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1787
dbus.Int64(
1788
# This is specific to GNU libC
1789
(exitstatus << 8)
1790
| self.last_checker_signal),
1155
1791
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1792
return ret
1159
1793
1160
1794
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1795
old_checker_pid = getattr(self.checker, "pid", None)
1166
1796
r = Client.start_checker(self, *args, **kwargs)
1167
1797
# Only if new checker process was started
1168
1798
if (self.checker is not None
1176
1806
return False
1177
1807
1178
1808
def approve(self, value=True):
1179
self.send_changedstate()
1180
1809
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1810
gobject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
1812
self.send_changedstate()
1185
1813
1186
1814
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1815
1816
## Interfaces
1188
1817
1189
1818
## Signals
1190
1819
1201
1830
pass
1202
1831
1203
1832
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1204
1834
@dbus.service.signal(_interface, signature="sv")
1205
1835
def PropertyChanged(self, property, value):
1206
1836
"D-Bus signal"
1227
1857
"D-Bus signal"
1228
1858
return self.need_approval()
1229
1859
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
1860
## Methods
1239
1861
1240
1862
# Approve - method
1248
1870
self.checked_ok()
1249
1871
1250
1872
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1251
1874
@dbus.service.method(_interface)
1252
1875
def Enable(self):
1253
1876
"D-Bus method"
1254
1877
self.enable()
1255
1878
1256
1879
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1257
1881
@dbus.service.method(_interface)
1258
1882
def StartChecker(self):
1259
1883
"D-Bus method"
1260
1884
self.start_checker()
1261
1885
1262
1886
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1263
1888
@dbus.service.method(_interface)
1264
1889
def Disable(self):
1265
1890
"D-Bus method"
1266
1891
self.disable()
1267
1892
1268
1893
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1269
1895
@dbus.service.method(_interface)
1270
1896
def StopChecker(self):
1271
1897
self.stop_checker()
1278
1904
return dbus.Boolean(bool(self.approvals_pending))
1279
1905
1280
1906
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1907
@dbus_service_property(_interface,
1908
signature="b",
1282
1909
access="readwrite")
1283
1910
def ApprovedByDefault_dbus_property(self, value=None):
1284
1911
if value is None: # get
1286
1913
self.approved_by_default = bool(value)
1287
1914
1288
1915
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1916
@dbus_service_property(_interface,
1917
signature="t",
1290
1918
access="readwrite")
1291
1919
def ApprovalDelay_dbus_property(self, value=None):
1292
1920
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1922
* 1000)
1294
1923
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
1924
1296
1925
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1926
@dbus_service_property(_interface,
1927
signature="t",
1298
1928
access="readwrite")
1299
1929
def ApprovalDuration_dbus_property(self, value=None):
1300
1930
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1932
* 1000)
1303
1933
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
1934
1305
1935
# Name - property
1936
@dbus_annotations(
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1306
1938
@dbus_service_property(_interface, signature="s", access="read")
1307
1939
def Name_dbus_property(self):
1308
1940
return dbus.String(self.name)
1309
1941
1310
1942
# Fingerprint - property
1943
@dbus_annotations(
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1311
1945
@dbus_service_property(_interface, signature="s", access="read")
1312
1946
def Fingerprint_dbus_property(self):
1313
1947
return dbus.String(self.fingerprint)
1314
1948
1315
1949
# Host - property
1316
@dbus_service_property(_interface, signature="s",
1950
@dbus_service_property(_interface,
1951
signature="s",
1317
1952
access="readwrite")
1318
1953
def Host_dbus_property(self, value=None):
1319
1954
if value is None: # get
1320
1955
return dbus.String(self.host)
1321
self.host = unicode(value)
1956
self.host = str(value)
1322
1957
1323
1958
# Created - property
1959
@dbus_annotations(
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1324
1961
@dbus_service_property(_interface, signature="s", access="read")
1325
1962
def Created_dbus_property(self):
1326
1963
return datetime_to_dbus(self.created)
1331
1968
return datetime_to_dbus(self.last_enabled)
1332
1969
1333
1970
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1971
@dbus_service_property(_interface,
1972
signature="b",
1335
1973
access="readwrite")
1336
1974
def Enabled_dbus_property(self, value=None):
1337
1975
if value is None: # get
1342
1980
self.disable()
1343
1981
1344
1982
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1983
@dbus_service_property(_interface,
1984
signature="s",
1346
1985
access="readwrite")
1347
1986
def LastCheckedOK_dbus_property(self, value=None):
1348
1987
if value is not None:
1350
1989
return
1351
1990
return datetime_to_dbus(self.last_checked_ok)
1352
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
1353
1997
# Expires - property
1354
1998
@dbus_service_property(_interface, signature="s", access="read")
1355
1999
def Expires_dbus_property(self):
1361
2005
return datetime_to_dbus(self.last_approval_request)
1362
2006
1363
2007
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
2008
@dbus_service_property(_interface,
2009
signature="t",
1365
2010
access="readwrite")
1366
2011
def Timeout_dbus_property(self, value=None):
1367
2012
if value is None: # get
1368
return dbus.UInt64(self.timeout_milliseconds())
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
1369
2015
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
2016
# Reschedule disabling
1371
2017
if self.enabled:
1372
2018
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
1376
2021
# The timeout has passed
1377
2022
self.disable()
1378
2023
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
2024
if (getattr(self, "disable_initiator_tag", None)
1383
2025
is None):
1384
2026
return
1385
2027
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
2028
self.disable_initiator_tag = gobject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2030
self.disable)
1389
2031
1390
2032
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
2034
signature="t",
1392
2035
access="readwrite")
1393
2036
def ExtendedTimeout_dbus_property(self, value=None):
1394
2037
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2039
* 1000)
1396
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
2041
1398
2042
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
2043
@dbus_service_property(_interface,
2044
signature="t",
1400
2045
access="readwrite")
1401
2046
def Interval_dbus_property(self, value=None):
1402
2047
if value is None: # get
1403
return dbus.UInt64(self.interval_milliseconds())
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1404
2049
self.interval = datetime.timedelta(0, 0, 0, value)
1405
2050
if getattr(self, "checker_initiator_tag", None) is None:
1406
2051
return
1407
2052
if self.enabled:
1408
2053
# Reschedule checker run
1409
2054
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
2055
self.checker_initiator_tag = gobject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
1413
2058
1414
2059
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
2060
@dbus_service_property(_interface,
2061
signature="s",
1416
2062
access="readwrite")
1417
2063
def Checker_dbus_property(self, value=None):
1418
2064
if value is None: # get
1419
2065
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
2066
self.checker_command = str(value)
1421
2067
1422
2068
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
2069
@dbus_service_property(_interface,
2070
signature="b",
1424
2071
access="readwrite")
1425
2072
def CheckerRunning_dbus_property(self, value=None):
1426
2073
if value is None: # get
1431
2078
self.stop_checker()
1432
2079
1433
2080
# ObjectPath - property
2081
@dbus_annotations(
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
1434
2084
@dbus_service_property(_interface, signature="o", access="read")
1435
2085
def ObjectPath_dbus_property(self):
1436
2086
return self.dbus_object_path # is already a dbus.ObjectPath
1437
2087
1438
2088
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
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)
1441
2096
def Secret_dbus_property(self, value):
1442
self.secret = str(value)
2097
self.secret = bytes(value)
1443
2098
1444
2099
del _interface
1445
2100
1449
2104
self._pipe = child_pipe
1450
2105
self._pipe.send(('init', fpr, address))
1451
2106
if not self._pipe.recv():
1452
raise KeyError()
2107
raise KeyError(fpr)
1453
2108
1454
2109
def __getattribute__(self, name):
1455
2110
if name == '_pipe':
1459
2114
if data[0] == 'data':
1460
2115
return data[1]
1461
2116
if data[0] == 'function':
2117
1462
2118
def func(*args, **kwargs):
1463
2119
self._pipe.send(('funcall', name, args, kwargs))
1464
2120
return self._pipe.recv()[1]
2121
1465
2122
return func
1466
2123
1467
2124
def __setattr__(self, name, value):
1470
2127
self._pipe.send(('setattr', name, value))
1471
2128
1472
2129
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
1477
2130
class ClientHandler(socketserver.BaseRequestHandler, object):
1478
2131
"""A class to handle client connections.
1479
2132
1483
2136
def handle(self):
1484
2137
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
2138
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
2139
str(self.client_address))
1487
2140
logger.debug("Pipe FD: %d",
1488
2141
self.server.child_pipe.fileno())
1489
2142
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1494
1495
# Note: gnutls.connection.X509Credentials is really a
1496
# generic GnuTLS certificate credentials object so long as
1497
# no X.509 keys are added to it. Therefore, we can use it
1498
# here despite using OpenPGP certificates.
2143
session = gnutls.ClientSession(self.request)
1499
2144
1500
2145
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
2146
# "+AES-256-CBC", "+SHA1",
1505
2150
priority = self.server.gnutls_priority
1506
2151
if priority is None:
1507
2152
priority = "NORMAL"
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
2153
gnutls.priority_set_direct(session._c_object, priority,
2154
None)
1511
2155
1512
2156
# Start communication using the Mandos protocol
1513
2157
# Get protocol number
1515
2159
logger.debug("Protocol version: %r", line)
1516
2160
try:
1517
2161
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
2162
raise RuntimeError(line)
1519
2163
except (ValueError, IndexError, RuntimeError) as error:
1520
2164
logger.error("Unknown protocol version: %s", error)
1521
2165
return
1523
2167
# Start GnuTLS connection
1524
2168
try:
1525
2169
session.handshake()
1526
except gnutls.errors.GNUTLSError as error:
2170
except gnutls.Error as error:
1527
2171
logger.warning("Handshake failed: %s", error)
1528
2172
# Do not run session.bye() here: the session is not
1529
2173
# established. Just abandon the request.
1533
2177
approval_required = False
1534
2178
try:
1535
2179
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
1540
2183
logger.warning("Bad certificate: %s", error)
1541
2184
return
1542
2185
logger.debug("Fingerprint: %s", fpr)
1547
2190
except KeyError:
1548
2191
return
1549
2192
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
1554
2193
if client.approval_delay:
1555
2194
delay = client.approval_delay
1556
2195
client.approvals_pending += 1
1559
2198
while True:
1560
2199
if not client.enabled:
1561
2200
logger.info("Client %s is disabled",
1562
client.name)
2201
client.name)
1563
2202
if self.server.use_dbus:
1564
2203
# Emit D-Bus signal
1565
2204
client.Rejected("Disabled")
1574
2213
if self.server.use_dbus:
1575
2214
# Emit D-Bus signal
1576
2215
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
1579
2218
else:
1580
2219
logger.warning("Client %s was not approved",
1581
2220
client.name)
1587
2226
#wait until timeout or approved
1588
2227
time = datetime.datetime.now()
1589
2228
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
2229
client.changedstate.wait(delay.total_seconds())
1593
2230
client.changedstate.release()
1594
2231
time2 = datetime.datetime.now()
1595
2232
if (time2 - time) >= delay:
1606
2243
else:
1607
2244
delay -= time2 - time
1608
2245
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
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
1620
2252
1621
2253
logger.info("Sending secret to %s", client.name)
1622
2254
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
2255
client.bump_timeout(client.extended_timeout)
1624
2256
if self.server.use_dbus:
1625
2257
# Emit D-Bus signal
1626
2258
client.GotSecret()
1630
2262
client.approvals_pending -= 1
1631
2263
try:
1632
2264
session.bye()
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
2267
exc_info=error)
1635
2268
1636
2269
@staticmethod
1637
2270
def peer_certificate(session):
1638
2271
"Return the peer's OpenPGP certificate as a bytestring"
1639
2272
# If not an OpenPGP certificate...
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1642
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
# ...do the normal thing
1644
return session.peer_certificate
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
2276
return b""
1645
2277
list_size = ctypes.c_uint(1)
1646
cert_list = (gnutls.library.functions
1647
.gnutls_certificate_get_peers
2278
cert_list = (gnutls.certificate_get_peers
1648
2279
(session._c_object, ctypes.byref(list_size)))
1649
2280
if not bool(cert_list) and list_size.value != 0:
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
2281
raise gnutls.Error("error getting peer certificate")
1652
2282
if list_size.value == 0:
1653
2283
return None
1654
2284
cert = cert_list[0]
1658
2288
def fingerprint(openpgp):
1659
2289
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1660
2290
# New GnuTLS "datum" with the OpenPGP public key
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
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)))
1666
2295
# New empty GnuTLS certificate
1667
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1670
2298
# Import the OpenPGP public key into the certificate
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1675
2301
# Verify the self signature in the key
1676
2302
crtverify = ctypes.c_uint()
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1680
2305
if crtverify.value != 0:
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1684
2308
# New buffer for the fingerprint
1685
2309
buf = ctypes.create_string_buffer(20)
1686
2310
buf_len = ctypes.c_size_t()
1687
2311
# Get the fingerprint from the certificate into the buffer
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1691
2314
# Deinit the certificate
1692
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2315
gnutls.openpgp_crt_deinit(crt)
1693
2316
# Convert the buffer to a Python bytestring
1694
2317
fpr = ctypes.string_at(buf, buf_len.value)
1695
2318
# Convert the bytestring to hexadecimal notation
1699
2322
1700
2323
class MultiprocessingMixIn(object):
1701
2324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2325
1702
2326
def sub_process_main(self, request, address):
1703
2327
try:
1704
2328
self.finish_request(request, address)
1709
2333
def process_request(self, request, address):
1710
2334
"""Start a new process to process the request."""
1711
2335
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
2336
args = (request, address))
1714
2337
proc.start()
1715
2338
return proc
1716
2339
1717
2340
1718
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
2342
""" adds a pipe to the MixIn """
2343
1720
2344
def process_request(self, request, client_address):
1721
2345
"""Overrides and wraps the original process_request().
1722
2346
1731
2355
1732
2356
def add_pipe(self, parent_pipe, proc):
1733
2357
"""Dummy function; override as necessary"""
1734
raise NotImplementedError
2358
raise NotImplementedError()
1735
2359
1736
2360
1737
2361
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1743
2367
interface: None or a network interface name (string)
1744
2368
use_ipv6: Boolean; to use IPv6 or not
1745
2369
"""
2370
1746
2371
def __init__(self, server_address, RequestHandlerClass,
1747
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
"""
1748
2378
self.interface = interface
1749
2379
if use_ipv6:
1750
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.
1751
2407
socketserver.TCPServer.__init__(self, server_address,
1752
2408
RequestHandlerClass)
2409
1753
2410
def server_bind(self):
1754
2411
"""This overrides the normal server_bind() function
1755
2412
to bind to an interface if one was specified, and also NOT to
1761
2418
self.interface)
1762
2419
else:
1763
2420
try:
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
1768
2424
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
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:
1774
2429
logger.error("SO_BINDTODEVICE not available;"
1775
2430
" cannot bind to interface %s",
1776
2431
self.interface)
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
1777
2435
else:
1778
2436
raise
1779
2437
# Only bind(2) the socket if we really need to.
1782
2440
if self.address_family == socket.AF_INET6:
1783
2441
any_address = "::" # in6addr_any
1784
2442
else:
1785
any_address = socket.INADDR_ANY
2443
any_address = "0.0.0.0" # INADDR_ANY
1786
2444
self.server_address = (any_address,
1787
2445
self.server_address[1])
1788
2446
elif not self.server_address[1]:
1789
self.server_address = (self.server_address[0],
1790
0)
2447
self.server_address = (self.server_address[0], 0)
1791
2448
# if self.interface:
1792
2449
# self.server_address = (self.server_address[0],
1793
2450
# 0, # port
1807
2464
1808
2465
Assumes a gobject.MainLoop event loop.
1809
2466
"""
2467
1810
2468
def __init__(self, server_address, RequestHandlerClass,
1811
interface=None, use_ipv6=True, clients=None,
1812
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):
1813
2475
self.enabled = False
1814
2476
self.clients = clients
1815
2477
if self.clients is None:
1819
2481
IPv6_TCPServer.__init__(self, server_address,
1820
2482
RequestHandlerClass,
1821
2483
interface = interface,
1822
use_ipv6 = use_ipv6)
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1823
2487
def server_activate(self):
1824
2488
if self.enabled:
1825
2489
return socketserver.TCPServer.server_activate(self)
1829
2493
1830
2494
def add_pipe(self, parent_pipe, proc):
1831
2495
# Call "handle_ipc" for both data and EOF events
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
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))
1838
2502
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
2503
def handle_ipc(self, source, condition,
2504
parent_pipe=None,
2505
proc = None,
2506
client_object=None):
1855
2507
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2508
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1857
2509
# Wait for other process to exit
1858
2510
proc.join()
1859
2511
return False
1880
2532
parent_pipe.send(False)
1881
2533
return False
1882
2534
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
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))
1891
2542
parent_pipe.send(True)
1892
2543
# remove the old hook in favor of the new above hook on
1893
2544
# same fileno
1899
2550
1900
2551
parent_pipe.send(('data', getattr(client_object,
1901
2552
funcname)(*args,
1902
**kwargs)))
2553
**kwargs)))
1903
2554
1904
2555
if command == 'getattr':
1905
2556
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
1908
2560
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
2561
parent_pipe.send((
2562
'data', client_object.__getattribute__(attrname)))
1911
2563
1912
2564
if command == 'setattr':
1913
2565
attrname = request[1]
1917
2569
return True
1918
2570
1919
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
1920
2668
def string_to_delta(interval):
1921
2669
"""Parse a string and return a datetime.timedelta
1922
2670
1933
2681
>>> string_to_delta('5m 30s')
1934
2682
datetime.timedelta(0, 330)
1935
2683
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
1936
2690
timevalue = datetime.timedelta(0)
1937
2691
for s in interval.split():
1938
2692
try:
1939
suffix = unicode(s[-1])
2693
suffix = s[-1]
1940
2694
value = int(s[:-1])
1941
2695
if suffix == "d":
1942
2696
delta = datetime.timedelta(value)
1949
2703
elif suffix == "w":
1950
2704
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1951
2705
else:
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
1954
2708
raise ValueError(*(e.args))
1955
2709
timevalue += delta
1956
2710
return timevalue
1969
2723
sys.exit()
1970
2724
if not noclose:
1971
2725
# Close all standard open file descriptors
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1973
2727
if not stat.S_ISCHR(os.fstat(null).st_mode):
1974
2728
raise OSError(errno.ENODEV,
1975
"%s not a character device"
1976
% os.path.devnull)
2729
"{} not a character device"
2730
.format(os.devnull))
1977
2731
os.dup2(null, sys.stdin.fileno())
1978
2732
os.dup2(null, sys.stdout.fileno())
1979
2733
os.dup2(null, sys.stderr.fileno())
1988
2742
1989
2743
parser = argparse.ArgumentParser()
1990
2744
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
2745
version = "%(prog)s {}".format(version),
1992
2746
help="show version number and exit")
1993
2747
parser.add_argument("-i", "--interface", metavar="IF",
1994
2748
help="Bind to interface IF")
2000
2754
help="Run self-test")
2001
2755
parser.add_argument("--debug", action="store_true",
2002
2756
help="Debug mode; run in foreground and log"
2003
" to terminal")
2757
" to terminal", default=None)
2004
2758
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
2759
help="Debug level for stdout output")
2006
2760
parser.add_argument("--priority", help="GnuTLS"
2013
2767
" files")
2014
2768
parser.add_argument("--no-dbus", action="store_false",
2015
2769
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2770
" system bus interface", default=None)
2017
2771
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2772
dest="use_ipv6", help="Do not use IPv6",
2773
default=None)
2019
2774
parser.add_argument("--no-restore", action="store_false",
2020
2775
dest="restore", help="Do not restore stored"
2021
" state")
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")
2022
2780
parser.add_argument("--statedir", metavar="DIR",
2023
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)
2024
2787
2025
2788
options = parser.parse_args()
2026
2789
2027
2790
if options.check:
2028
2791
import doctest
2029
doctest.testmod()
2030
sys.exit()
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
2031
2794
2032
2795
# Default values for config file for server-global settings
2033
2796
server_defaults = { "interface": "",
2035
2798
"port": "",
2036
2799
"debug": "False",
2037
2800
"priority":
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2039
2803
"servicename": "Mandos",
2040
2804
"use_dbus": "True",
2041
2805
"use_ipv6": "True",
2042
2806
"debuglevel": "",
2043
2807
"restore": "True",
2044
"statedir": "/var/lib/mandos"
2045
}
2808
"socket": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2811
"zeroconf": "True",
2812
}
2046
2813
2047
2814
# Parse config file for server-global settings
2048
2815
server_config = configparser.SafeConfigParser(server_defaults)
2049
2816
del server_defaults
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2052
2818
# Convert the SafeConfigParser object to a dict
2053
2819
server_settings = server_config.defaults()
2054
2820
# Use the appropriate methods on the non-string config options
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2056
2822
server_settings[option] = server_config.getboolean("DEFAULT",
2057
2823
option)
2058
2824
if server_settings["port"]:
2059
2825
server_settings["port"] = server_config.getint("DEFAULT",
2060
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"])
2061
2836
del server_config
2062
2837
2063
2838
# Override the settings from the config file with command line
2064
2839
# options, if set.
2065
2840
for option in ("interface", "address", "port", "debug",
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
2069
2844
value = getattr(options, option)
2070
2845
if value is not None:
2071
2846
server_settings[option] = value
2072
2847
del options
2073
2848
# Force all strings to be unicode
2074
2849
for option in server_settings.keys():
2075
if type(server_settings[option]) is str:
2076
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
2077
2860
# Now we have our good server settings in "server_settings"
2078
2861
2079
2862
##################################################################
2080
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
2081
2869
# For convenience
2082
2870
debug = server_settings["debug"]
2083
2871
debuglevel = server_settings["debuglevel"]
2085
2873
use_ipv6 = server_settings["use_ipv6"]
2086
2874
stored_state_path = os.path.join(server_settings["statedir"],
2087
2875
stored_state_file)
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2088
2878
2089
2879
if debug:
2090
2880
initlogger(debug, logging.DEBUG)
2096
2886
initlogger(debug, level)
2097
2887
2098
2888
if server_settings["servicename"] != "Mandos":
2099
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
2103
2893
2104
2894
# Parse config file with clients
2105
2895
client_config = configparser.SafeConfigParser(Client
2110
2900
global mandos_dbus_service
2111
2901
mandos_dbus_service = None
2112
2902
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
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
2124
2919
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
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)
2128
2924
2129
try:
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
2132
except KeyError:
2925
for name, group in (("_mandos", "_mandos"),
2926
("mandos", "mandos"),
2927
("nobody", "nogroup")):
2133
2928
try:
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
2929
uid = pwd.getpwnam(name).pw_uid
2930
gid = pwd.getpwnam(group).pw_gid
2931
break
2136
2932
except KeyError:
2137
try:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
2140
except KeyError:
2141
uid = 65534
2142
gid = 65534
2933
continue
2934
else:
2935
uid = 65534
2936
gid = 65534
2143
2937
try:
2144
2938
os.setgid(gid)
2145
2939
os.setuid(uid)
2146
2940
except OSError as error:
2147
if error[0] != errno.EPERM:
2148
raise error
2941
if error.errno != errno.EPERM:
2942
raise
2149
2943
2150
2944
if debug:
2151
2945
# Enable all possible GnuTLS debugging
2152
2946
2153
2947
# "Use a log level over 10 to enable all debugging options."
2154
2948
# - GnuTLS manual
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
2949
gnutls.global_set_log_level(11)
2156
2950
2157
@gnutls.library.types.gnutls_log_func
2951
@gnutls.log_func
2158
2952
def debug_gnutls(level, string):
2159
2953
logger.debug("GnuTLS: %s", string[:-1])
2160
2954
2161
(gnutls.library.functions
2162
.gnutls_global_set_log_function(debug_gnutls))
2955
gnutls.global_set_log_function(debug_gnutls)
2163
2956
2164
2957
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2958
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2166
2959
os.dup2(null, sys.stdin.fileno())
2167
2960
if null > 2:
2168
2961
os.close(null)
2169
2962
2170
2963
# Need to fork before connecting to D-Bus
2171
if not debug:
2964
if not foreground:
2172
2965
# Close all input and output, do double fork, etc.
2173
2966
daemon()
2174
2967
2968
# multiprocessing will use threads, so before we use gobject we
2969
# need to inform gobject that threads will be used.
2175
2970
gobject.threads_init()
2176
2971
2177
2972
global main_loop
2178
2973
# From the Avahi example code
2179
DBusGMainLoop(set_as_default=True )
2974
DBusGMainLoop(set_as_default=True)
2180
2975
main_loop = gobject.MainLoop()
2181
2976
bus = dbus.SystemBus()
2182
2977
# End of Avahi example code
2183
2978
if use_dbus:
2184
2979
try:
2185
2980
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
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)
2192
2988
use_dbus = False
2193
2989
server_settings["use_dbus"] = False
2194
2990
tcp_server.use_dbus = False
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(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"))
2203
3001
2204
3002
global multiprocessing_manager
2205
3003
multiprocessing_manager = multiprocessing.Manager()
2206
3004
2207
3005
client_class = Client
2208
3006
if use_dbus:
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
3007
client_class = functools.partial(ClientDBus, bus = bus)
2211
3008
2212
3009
client_settings = Client.config_parser(client_config)
2213
3010
old_client_settings = {}
2214
3011
clients_data = {}
2215
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
2216
3021
# Get client data and settings from last running state.
2217
3022
if server_settings["restore"]:
2218
3023
try:
2219
3024
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
3025
clients_data, old_client_settings = pickle.load(
3026
stored_state)
2222
3027
os.remove(stored_state_path)
2223
3028
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
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)
2227
3035
raise
2228
3036
except EOFError as e:
2229
3037
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
3038
"EOFError:",
3039
exc_info=e)
2231
3040
2232
3041
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
3042
for client_name, client in clients_data.items():
3043
# Skip removed clients
3044
if client_name not in client_settings:
3045
continue
3046
2234
3047
# Decide which value to use after restoring saved state.
2235
3048
# We have three different values: Old config file,
2236
3049
# new config file, and saved state.
2241
3054
# For each value in new config, check if it
2242
3055
# differs from the old config value (Except for
2243
3056
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
3057
if (name != "secret"
3058
and (value !=
3059
old_client_settings[client_name][name])):
2247
3060
client[name] = value
2248
3061
except KeyError:
2249
3062
pass
2250
3063
2251
3064
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
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.
2255
3069
if client["enabled"]:
2256
3070
if datetime.datetime.utcnow() >= client["expires"]:
2257
3071
if not client["last_checked_ok"]:
2258
3072
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
3073
"disabling client {} - Client never "
3074
"performed a successful checker".format(
3075
client_name))
2262
3076
client["enabled"] = False
2263
3077
elif client["last_checker_status"] != 0:
2264
3078
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
3079
"disabling client {} - Client last"
3080
" checker failed with error code"
3081
" {}".format(
3082
client_name,
3083
client["last_checker_status"]))
2269
3084
client["enabled"] = False
2270
3085
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
3086
client["expires"] = (
3087
datetime.datetime.utcnow()
3088
+ client["timeout"])
2274
3089
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
3090
" keeping {} enabled".format(
3091
client_name))
2277
3092
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
3093
client["secret"] = pgp.decrypt(
3094
client["encrypted_secret"],
3095
client_settings[client_name]["secret"])
2282
3096
except PGPError:
2283
3097
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
3098
logger.debug("Failed to decrypt {} old secret".format(
3099
client_name))
3100
client["secret"] = (client_settings[client_name]
3101
["secret"])
2289
3102
2290
3103
# Add/remove clients based on new changes made to config
2291
3104
for client_name in (set(old_client_settings)
2294
3107
for client_name in (set(client_settings)
2295
3108
- set(old_client_settings)):
2296
3109
clients_data[client_name] = client_settings[client_name]
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
3110
3111
# Create all client objects
3112
for client_name, client in clients_data.items():
2300
3113
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
3114
name = client_name,
3115
settings = client,
3116
server_settings = server_settings)
2302
3117
2303
3118
if not tcp_server.clients:
2304
3119
logger.warning("No clients defined")
2305
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
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
2318
3131
del pidfilename
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
3132
2321
3133
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
3134
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2323
3135
2324
3136
if use_dbus:
2325
class MandosDBusService(dbus.service.Object):
3137
3138
@alternate_dbus_interfaces(
3139
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3140
class MandosDBusService(DBusObjectWithObjectManager):
2326
3141
"""A D-Bus proxy object"""
3142
2327
3143
def __init__(self):
2328
3144
dbus.service.Object.__init__(self, bus, "/")
3145
2329
3146
_interface = "se.recompile.Mandos"
2330
3147
2331
3148
@dbus.service.signal(_interface, signature="o")
2338
3155
"D-Bus signal"
2339
3156
pass
2340
3157
3158
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3159
"true"})
2341
3160
@dbus.service.signal(_interface, signature="os")
2342
3161
def ClientRemoved(self, objpath, name):
2343
3162
"D-Bus signal"
2344
3163
pass
2345
3164
3165
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3166
"true"})
2346
3167
@dbus.service.method(_interface, out_signature="ao")
2347
3168
def GetAllClients(self):
2348
3169
"D-Bus method"
2349
return dbus.Array(c.dbus_object_path
2350
for c in
3170
return dbus.Array(c.dbus_object_path for c in
2351
3171
tcp_server.clients.itervalues())
2352
3172
3173
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3174
"true"})
2353
3175
@dbus.service.method(_interface,
2354
3176
out_signature="a{oa{sv}}")
2355
3177
def GetAllClientsWithProperties(self):
2356
3178
"D-Bus method"
2357
3179
return dbus.Dictionary(
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
3180
{ c.dbus_object_path: c.GetAll(
3181
"se.recompile.Mandos.Client")
3182
for c in tcp_server.clients.itervalues() },
2360
3183
signature="oa{sv}")
2361
3184
2362
3185
@dbus.service.method(_interface, in_signature="o")
2366
3189
if c.dbus_object_path == object_path:
2367
3190
del tcp_server.clients[c.name]
2368
3191
c.remove_from_connection()
2369
# Don't signal anything except ClientRemoved
3192
# Don't signal the disabling
2370
3193
c.disable(quiet=True)
2371
# Emit D-Bus signal
2372
self.ClientRemoved(object_path, c.name)
3194
# Emit D-Bus signal for removal
3195
self.client_removed_signal(c)
2373
3196
return
2374
3197
raise KeyError(object_path)
2375
3198
2376
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)
2377
3236
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
3237
mandos_dbus_service = MandosDBusService()
2381
3238
2382
3239
def cleanup():
2383
3240
"Cleanup function; run on exit"
2384
service.cleanup()
3241
if zeroconf:
3242
service.cleanup()
2385
3243
2386
3244
multiprocessing.active_children()
3245
wnull.close()
2387
3246
if not (tcp_server.clients or client_settings):
2388
3247
return
2389
3248
2400
3259
2401
3260
# A list of attributes that can not be pickled
2402
3261
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
3262
exclude = { "bus", "changedstate", "secret",
3263
"checker", "server_settings" }
3264
for name, typ in inspect.getmembers(dbus.service
3265
.Object):
2407
3266
exclude.add(name)
2408
3267
2409
3268
client_dict["encrypted_secret"] = (client
2416
3275
del client_settings[client.name]["secret"]
2417
3276
2418
3277
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
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:
2424
3284
pickle.dump((clients, client_settings), stored_state)
3285
tempname = stored_state.name
2425
3286
os.rename(tempname, stored_state_path)
2426
3287
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
3288
if not debug:
2430
3289
try:
2431
3290
os.remove(tempname)
2432
3291
except NameError:
2433
3292
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
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
2437
3300
2438
3301
# Delete all clients, and settings from config
2439
3302
while tcp_server.clients:
2440
3303
name, client = tcp_server.clients.popitem()
2441
3304
if use_dbus:
2442
3305
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2444
3307
client.disable(quiet=True)
3308
# Emit D-Bus signal for removal
2445
3309
if use_dbus:
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
3310
mandos_dbus_service.client_removed_signal(client)
2450
3311
client_settings.clear()
2451
3312
2452
3313
atexit.register(cleanup)
2453
3314
2454
3315
for client in tcp_server.clients.itervalues():
2455
3316
if use_dbus:
2456
# Emit D-Bus signal
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3317
# Emit D-Bus signal for adding
3318
mandos_dbus_service.client_added_signal(client)
2458
3319
# Need to initiate checking of clients
2459
3320
if client.enabled:
2460
3321
client.init_checker()
2463
3324
tcp_server.server_activate()
2464
3325
2465
3326
# Find out what port we got
2466
service.port = tcp_server.socket.getsockname()[1]
3327
if zeroconf:
3328
service.port = tcp_server.socket.getsockname()[1]
2467
3329
if use_ipv6:
2468
3330
logger.info("Now listening on address %r, port %d,"
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
3331
" flowinfo %d, scope_id %d",
3332
*tcp_server.socket.getsockname())
2471
3333
else: # IPv4
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
3334
logger.info("Now listening on address %r, port %d",
3335
*tcp_server.socket.getsockname())
2474
3336
2475
3337
#service.interface = tcp_server.socket.getsockname()[3]
2476
3338
2477
3339
try:
2478
# From the Avahi example code
2479
try:
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
2484
sys.exit(1)
2485
# 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
2486
3349
2487
3350
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2488
3351
lambda *args, **kwargs:
2492
3355
logger.debug("Starting main loop")
2493
3356
main_loop.run()
2494
3357
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
3358
logger.critical("Avahi Error", exc_info=error)
2496
3359
cleanup()
2497
3360
sys.exit(1)
2498
3361
except KeyboardInterrupt:
2503
3366
# Must run before the D-Bus bus name gets deregistered
2504
3367
cleanup()
2505
3368
3369
2506
3370
if __name__ == '__main__':
2507
3371
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0