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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
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
38
43
import socket
39
44
import argparse
40
45
import datetime
41
46
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
47
try:
48
import ConfigParser as configparser
49
except ImportError:
50
import configparser
49
51
import sys
50
52
import re
51
53
import os
60
62
import struct
61
63
import fcntl
62
64
import functools
63
import cPickle as pickle
65
try:
66
import cPickle as pickle
67
except ImportError:
68
import pickle
64
69
import multiprocessing
65
70
import types
71
import binascii
72
import tempfile
73
import itertools
74
import collections
75
import codecs
66
76
67
77
import dbus
68
78
import dbus.service
69
import gobject
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
70
83
import avahi
71
84
from dbus.mainloop.glib import DBusGMainLoop
72
85
import ctypes
82
95
except ImportError:
83
96
SO_BINDTODEVICE = None
84
97
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.3"
102
stored_state_file = "clients.pickle"
103
104
logger = logging.getLogger()
105
syslogger = None
106
107
try:
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
110
except (OSError, AttributeError):
111
112
def if_nametoindex(interface):
113
"Get an interface index the hard way, i.e. using fcntl()"
114
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
115
with contextlib.closing(socket.socket()) as s:
116
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
119
return interface_index
120
121
122
def initlogger(debug, level=logging.WARNING):
123
"""init logger and add loglevel"""
124
125
global syslogger
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
129
syslogger.setFormatter(logging.Formatter
130
('Mandos [%(process)d]: %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(syslogger)
133
134
if debug:
135
console = logging.StreamHandler()
136
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
137
' [%(process)d]:'
138
' %(levelname)s:'
139
' %(message)s'))
140
logger.addHandler(console)
141
logger.setLevel(level)
142
143
144
class PGPError(Exception):
145
"""Exception if encryption/decryption fails"""
146
pass
147
148
149
class PGPEngine(object):
150
"""A simple class for OpenPGP symmetric encryption & decryption"""
151
152
def __init__(self):
153
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
154
self.gpg = "gpg"
155
try:
156
output = subprocess.check_output(["gpgconf"])
157
for line in output.splitlines():
158
name, text, path = line.split(":")
159
if name == "gpg":
160
self.gpg = path
161
break
162
except OSError as e:
163
if e.errno != errno.ENOENT:
164
raise
165
self.gnupgargs = ['--batch',
166
'--homedir', self.tempdir,
167
'--force-mdc',
168
'--quiet',
169
'--no-use-agent']
170
171
def __enter__(self):
172
return self
173
174
def __exit__(self, exc_type, exc_value, traceback):
175
self._cleanup()
176
return False
177
178
def __del__(self):
179
self._cleanup()
180
181
def _cleanup(self):
182
if self.tempdir is not None:
183
# Delete contents of tempdir
184
for root, dirs, files in os.walk(self.tempdir,
185
topdown = False):
186
for filename in files:
187
os.remove(os.path.join(root, filename))
188
for dirname in dirs:
189
os.rmdir(os.path.join(root, dirname))
190
# Remove tempdir
191
os.rmdir(self.tempdir)
192
self.tempdir = None
193
194
def password_encode(self, password):
195
# Passphrase can not be empty and can not contain newlines or
196
# NUL bytes. So we prefix it and hex encode it.
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
203
return encoded
204
205
def encrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen([self.gpg, '--symmetric',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return ciphertext
222
223
def decrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
228
passfile.flush()
229
proc = subprocess.Popen([self.gpg, '--decrypt',
230
'--passphrase-file',
231
passfile.name]
232
+ self.gnupgargs,
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
238
raise PGPError(err)
239
return decrypted_plaintext
240
103
241
104
242
class AvahiError(Exception):
105
243
def __init__(self, value, *args, **kwargs):
106
244
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
110
248
111
249
class AvahiServiceError(AvahiError):
112
250
pass
113
251
252
114
253
class AvahiGroupError(AvahiError):
115
254
pass
116
255
123
262
Used to optionally bind to the specified interface.
124
263
name: string; Example: 'Mandos'
125
264
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
265
See <https://www.iana.org/assignments/service-names-port-numbers>
127
266
port: integer; what port to announce
128
267
TXT: list of strings; TXT record for the service
129
268
domain: string; Domain to publish on, default to .local if empty.
135
274
server: D-Bus Server
136
275
bus: dbus.SystemBus()
137
276
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
277
278
def __init__(self,
279
interface = avahi.IF_UNSPEC,
280
name = None,
281
servicetype = None,
282
port = None,
283
TXT = None,
284
domain = "",
285
host = "",
286
max_renames = 32768,
287
protocol = avahi.PROTO_UNSPEC,
288
bus = None):
142
289
self.interface = interface
143
290
self.name = name
144
291
self.type = servicetype
153
300
self.server = None
154
301
self.bus = bus
155
302
self.entry_group_state_changed_match = None
156
def rename(self):
303
304
def rename(self, remove=True):
157
305
"""Derived from the Avahi example code"""
158
306
if self.rename_count >= self.max_renames:
159
307
logger.critical("No suitable Zeroconf service name found"
160
308
" after %i retries, exiting.",
161
309
self.rename_count)
162
310
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
313
self.rename_count += 1
165
314
logger.info("Changing Zeroconf service name to %r ...",
166
315
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
316
if remove:
317
self.remove()
172
318
try:
173
319
self.add()
174
320
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
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
179
330
def remove(self):
180
331
"""Derived from the Avahi example code"""
181
332
if self.entry_group_state_changed_match is not None:
183
334
self.entry_group_state_changed_match = None
184
335
if self.group is not None:
185
336
self.group.Reset()
337
186
338
def add(self):
187
339
"""Derived from the Avahi example code"""
188
340
self.remove()
193
345
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
346
self.entry_group_state_changed_match = (
195
347
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
348
'StateChanged', self.entry_group_state_changed))
197
349
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
350
self.name, self.type)
199
351
self.group.AddService(
205
357
dbus.UInt16(self.port),
206
358
avahi.string_array_to_txt_array(self.TXT))
207
359
self.group.Commit()
360
208
361
def entry_group_state_changed(self, state, error):
209
362
"""Derived from the Avahi example code"""
210
363
logger.debug("Avahi entry group state change: %i", state)
216
369
self.rename()
217
370
elif state == avahi.ENTRY_GROUP_FAILURE:
218
371
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
372
str(error))
373
raise AvahiGroupError("State changed: {!s}".format(error))
374
222
375
def cleanup(self):
223
376
"""Derived from the Avahi example code"""
224
377
if self.group is not None:
225
378
try:
226
379
self.group.Free()
227
380
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
381
dbus.exceptions.DBusException):
229
382
pass
230
383
self.group = None
231
384
self.remove()
385
232
386
def server_state_changed(self, state, error=None):
233
387
"""Derived from the Avahi example code"""
234
388
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"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
}
242
395
if state in bad_states:
243
396
if bad_states[state] is not None:
244
397
if error is None:
247
400
logger.error(bad_states[state] + ": %r", error)
248
401
self.cleanup()
249
402
elif state == avahi.SERVER_RUNNING:
250
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)
251
415
else:
252
416
if error is None:
253
417
logger.debug("Unknown state: %r", state)
254
418
else:
255
419
logger.debug("Unknown state: %r: %r", state, error)
420
256
421
def activate(self):
257
422
"""Derived from the Avahi example code"""
258
423
if self.server is None:
262
427
follow_name_owner_changes=True),
263
428
avahi.DBUS_INTERFACE_SERVER)
264
429
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
430
self.server_state_changed)
266
431
self.server_state_changed(self.server.GetState())
267
432
268
433
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
434
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
436
"""Add the new name to the syslog messages"""
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
440
.format(self.name)))
441
return ret
442
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
447
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
451
def __init__(self):
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
454
# happens.
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
458
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
461
462
# Constants
463
E_SUCCESS = 0
464
E_INTERRUPTED = -52
465
E_AGAIN = -28
466
CRT_OPENPGP = 2
467
CLIENT = 2
468
SHUT_RDWR = 0
469
CRD_CERTIFICATE = 1
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
472
473
# Types
474
class session_int(ctypes.Structure):
475
_fields_ = []
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
478
_fields_ = []
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
486
_fields_ = []
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int #
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
493
494
# Exceptions
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
503
# gnutls.strerror()
504
self.code = code
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
508
message, *args)
509
510
class CertificateSecurityError(Error):
511
pass
512
513
# Classes
514
class Credentials(object):
515
def __init__(self):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
520
521
def __del__(self):
522
gnutls.certificate_free_credentials(self._c_object)
523
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
531
True)
532
self.socket = socket
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
537
ctypes.c_void_p))
538
self.credentials = credentials
539
540
def __del__(self):
541
gnutls.deinit(self._c_object)
542
543
def handshake(self):
544
return gnutls.handshake(self._c_object)
545
546
def send(self, data):
547
data = bytes(data)
548
data_len = len(data)
549
while data_len > 0:
550
data_len -= gnutls.record_send(self._c_object,
551
data[-data_len:],
552
data_len)
553
554
def bye(self):
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
556
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
561
if result >= 0:
562
return result
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
566
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
570
while result < 0:
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
574
return result
575
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
578
579
# Functions
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
584
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
588
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
592
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
595
ctypes.c_size_t]
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
598
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
604
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
609
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
613
ctypes.c_int]
614
handshake_set_private_extensions.restype = None
615
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
618
ctypes.c_void_p]
619
credentials_set.restype = _error_code
620
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
624
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
628
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
633
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
637
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
641
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
645
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
650
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
654
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
659
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
663
664
# All the function declarations below are from gnutls/openpgp.h
665
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
669
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
673
openpgp_crt_fmt_t]
674
openpgp_crt_import.restype = _error_code
675
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
680
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
684
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
688
ctypes.c_void_p,
689
ctypes.POINTER(
690
ctypes.c_size_t)]
691
openpgp_crt_get_fingerprint.restype = _error_code
692
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
696
gnutls = GnuTLS()
697
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
701
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
704
"""
705
connection.send(func(*args, **kwargs))
706
connection.close()
707
275
708
class Client(object):
276
709
"""A representation of a client host served by this server.
277
710
278
711
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
712
approved: bool(); 'None' if not yet approved/disapproved
280
713
approval_delay: datetime.timedelta(); Time to wait for approval
281
714
approval_duration: datetime.timedelta(); Duration of one approval
282
715
checker: subprocess.Popen(); a running checker process used
289
722
instance %(name)s can be used in the command.
290
723
checker_initiator_tag: a gobject event source tag, or None
291
724
created: datetime.datetime(); (UTC) object creation
725
client_structure: Object describing what attributes a client has
726
and is used for storing the client at exit
292
727
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
728
disable_initiator_tag: a gobject event source tag, or None
295
729
enabled: bool()
296
730
fingerprint: string (40 or 32 hexadecimal digits); used to
299
733
interval: datetime.timedelta(); How often to start a new checker
300
734
last_approval_request: datetime.datetime(); (UTC) or None
301
735
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
736
last_checker_status: integer between 0 and 255 reflecting exit
737
status of last checker. -1 reflects crashed
738
checker, -2 means no checker completed yet.
739
last_checker_signal: The signal which killed the last checker, if
740
last_checker_status is -1
741
last_enabled: datetime.datetime(); (UTC) or None
303
742
name: string; from the config file, used in log messages and
304
743
D-Bus identifiers
305
744
secret: bytestring; sent verbatim (over TLS) to client
306
745
timeout: datetime.timedelta(); How long from last_checked_ok
307
746
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
747
extended_timeout: extra long timeout when secret has been sent
309
748
runtime_expansions: Allowed attributes for runtime expansion.
310
749
expires: datetime.datetime(); time (UTC) when a client will be
311
750
disabled, or None
751
server_settings: The server_settings dict from main()
312
752
"""
313
753
314
754
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
317
758
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
759
client_defaults = {
760
"timeout": "PT5M",
761
"extended_timeout": "PT15M",
762
"interval": "PT2M",
763
"checker": "fping -q -- %%(host)s",
764
"host": "",
765
"approval_delay": "PT0S",
766
"approval_duration": "PT1S",
767
"approved_by_default": "True",
768
"enabled": "True",
769
}
770
771
@staticmethod
772
def config_parser(config):
773
"""Construct a new dict of client settings of this form:
774
{ client_name: {setting_name: value, ...}, ...}
775
with exceptions for any special settings as defined above.
776
NOTE: Must be a pure function. Must return the same result
777
value given the same arguments.
778
"""
779
settings = {}
780
for client_name in config.sections():
781
section = dict(config.items(client_name))
782
client = settings[client_name] = {}
783
784
client["host"] = section["host"]
785
# Reformat values from string types to Python types
786
client["approved_by_default"] = config.getboolean(
787
client_name, "approved_by_default")
788
client["enabled"] = config.getboolean(client_name,
789
"enabled")
790
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
794
client["fingerprint"] = (section["fingerprint"].upper()
795
.replace(" ", ""))
796
if "secret" in section:
797
client["secret"] = section["secret"].decode("base64")
798
elif "secfile" in section:
799
with open(os.path.expanduser(os.path.expandvars
800
(section["secfile"])),
801
"rb") as secfile:
802
client["secret"] = secfile.read()
803
else:
804
raise TypeError("No secret or secfile for section {}"
805
.format(section))
806
client["timeout"] = string_to_delta(section["timeout"])
807
client["extended_timeout"] = string_to_delta(
808
section["extended_timeout"])
809
client["interval"] = string_to_delta(section["interval"])
810
client["approval_delay"] = string_to_delta(
811
section["approval_delay"])
812
client["approval_duration"] = string_to_delta(
813
section["approval_duration"])
814
client["checker_command"] = section["checker"]
815
client["last_approval_request"] = None
816
client["last_checked_ok"] = None
817
client["last_checker_status"] = -2
818
819
return settings
820
821
def __init__(self, settings, name = None, server_settings=None):
338
822
self.name = name
339
if config is None:
340
config = {}
823
if server_settings is None:
824
server_settings = {}
825
self.server_settings = server_settings
826
# adding all client settings
827
for setting, value in settings.items():
828
setattr(self, setting, value)
829
830
if self.enabled:
831
if not hasattr(self, "last_enabled"):
832
self.last_enabled = datetime.datetime.utcnow()
833
if not hasattr(self, "expires"):
834
self.expires = (datetime.datetime.utcnow()
835
+ self.timeout)
836
else:
837
self.last_enabled = None
838
self.expires = None
839
341
840
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
841
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
842
self.created = settings.get("created",
843
datetime.datetime.utcnow())
844
845
# attributes specific for this server instance
369
846
self.checker = None
370
847
self.checker_initiator_tag = None
371
848
self.disable_initiator_tag = None
372
self.expires = None
373
849
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
850
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
851
self.approved = None
380
852
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
857
if not attr.startswith("_")]
858
self.client_structure.append("client_structure")
859
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
862
if not name.startswith("_"):
863
self.client_structure.append(name)
388
864
865
# Send notice to process children that client state has changed
389
866
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
867
with self.changedstate:
868
self.changedstate.notify_all()
393
869
394
870
def enable(self):
395
871
"""Start this client's checker and timeout hooks"""
396
872
if getattr(self, "enabled", False):
397
873
# Already enabled
398
874
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
875
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
876
self.enabled = True
411
877
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
878
self.init_checker()
879
self.send_changedstate()
414
880
415
881
def disable(self, quiet=True):
416
882
"""Disable this client."""
417
883
if not getattr(self, "enabled", False):
418
884
return False
419
885
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
886
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
887
if getattr(self, "disable_initiator_tag", None) is not None:
424
888
gobject.source_remove(self.disable_initiator_tag)
425
889
self.disable_initiator_tag = None
426
890
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
891
if getattr(self, "checker_initiator_tag", None) is not None:
428
892
gobject.source_remove(self.checker_initiator_tag)
429
893
self.checker_initiator_tag = None
430
894
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
895
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
434
898
# Do not run this again if called by a gobject.timeout_add
435
899
return False
436
900
437
901
def __del__(self):
438
self.disable_hook = None
439
902
self.disable()
440
903
441
def checker_callback(self, pid, condition, command):
904
def init_checker(self):
905
# Schedule a new checker to be started an 'interval' from now,
906
# and every interval from then on.
907
if self.checker_initiator_tag is not None:
908
gobject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = gobject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
911
self.start_checker)
912
# Schedule a disable() when 'timeout' has passed
913
if self.disable_initiator_tag is not None:
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = gobject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
917
# Also start a new checker *right now*.
918
self.start_checker()
919
920
def checker_callback(self, source, condition, connection,
921
command):
442
922
"""The checker has completed, so take appropriate actions."""
443
923
self.checker_callback_tag = None
444
924
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
927
connection.close()
928
929
if returncode >= 0:
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
932
if self.last_checker_status == 0:
448
933
logger.info("Checker for %(name)s succeeded",
449
934
vars(self))
450
935
self.checked_ok()
451
936
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
937
logger.info("Checker for %(name)s failed", vars(self))
454
938
else:
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
455
941
logger.warning("Checker for %(name)s crashed?",
456
942
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
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."""
464
954
if timeout is None:
465
955
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
956
if self.disable_initiator_tag is not None:
957
gobject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
959
if getattr(self, "enabled", False):
960
self.disable_initiator_tag = gobject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
962
self.expires = datetime.datetime.utcnow() + timeout
472
963
473
964
def need_approval(self):
474
965
self.last_approval_request = datetime.datetime.utcnow()
479
970
If a checker already exists, leave it running and do
480
971
nothing."""
481
972
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# 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
486
977
# checkers alone, the checker would have to take more time
487
978
# than 'timeout' for the client to be disabled, which is as it
488
979
# should be.
489
980
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
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
503
985
# Start a new checker if needed
504
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 }
505
991
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
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
524
998
self.current_checker_command = command
525
try:
526
logger.info("Starting checker %r for %s",
527
command, self.name)
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
533
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
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)
548
1024
# Re-run this periodically if run by gobject.timeout_add
549
1025
return True
550
1026
556
1032
if getattr(self, "checker", None) is None:
557
1033
return
558
1034
logger.debug("Stopping checker for %(name)s", vars(self))
559
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
561
#time.sleep(0.5)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
566
raise
1035
self.checker.terminate()
567
1036
self.checker = None
568
1037
569
1038
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
572
1043
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1044
become properties on the D-Bus.
574
1045
583
1054
# "Set" method, so we fail early here:
584
1055
if byte_arrays and signature != "ay":
585
1056
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
1057
" signature {!r}".format(signature))
1058
587
1059
def decorator(func):
588
1060
func._dbus_is_property = True
589
1061
func._dbus_interface = dbus_interface
594
1066
func._dbus_name = func._dbus_name[:-14]
595
1067
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
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
597
1113
return decorator
598
1114
599
1115
600
1116
class DBusPropertyException(dbus.exceptions.DBusException):
601
1117
"""A base class for D-Bus property-related exceptions
602
1118
"""
603
def __unicode__(self):
604
return unicode(str(self))
1119
pass
605
1120
606
1121
607
1122
class DBusPropertyAccessException(DBusPropertyException):
616
1131
pass
617
1132
618
1133
619
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):
620
1224
"""A D-Bus object with properties.
621
1225
622
1226
Classes inheriting from this can use the dbus_service_property
624
1228
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
1229
"""
626
1230
627
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
630
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
633
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
638
639
1231
def _get_dbus_property(self, interface_name, property_name):
640
1232
"""Returns a bound method if one exists which is a D-Bus
641
1233
property with the specified name and interface.
642
1234
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(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")):
646
1238
if (value._dbus_name == property_name
647
1239
and value._dbus_interface == interface_name):
648
1240
return value.__get__(self)
649
1241
650
1242
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
654
655
@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",
656
1257
out_signature="v")
657
1258
def Get(self, interface_name, property_name):
658
1259
"""Standard D-Bus property Get() method, see D-Bus standard.
676
1277
# The byte_arrays option is not supported yet on
677
1278
# signatures other than "ay".
678
1279
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
1283
value = dbus.ByteArray(b''.join(chr(byte)
1284
for byte in value))
682
1285
prop(value)
683
1286
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1288
in_signature="s",
685
1289
out_signature="a{sv}")
686
1290
def GetAll(self, interface_name):
687
1291
"""Standard D-Bus property GetAll() method, see D-Bus
689
1293
690
1294
Note: Will not include properties with access="write".
691
1295
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
1296
properties = {}
1297
for name, prop in self._get_all_dbus_things("property"):
694
1298
if (interface_name
695
1299
and interface_name != prop._dbus_interface):
696
1300
# Interface non-empty but did not match
700
1304
continue
701
1305
value = prop()
702
1306
if not hasattr(value, "variant_level"):
703
all[name] = value
1307
properties[name] = value
704
1308
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
1311
return dbus.Dictionary(properties, signature="sv")
1312
1313
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1314
def PropertiesChanged(self, interface_name, changed_properties,
1315
invalidated_properties):
1316
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1317
standard.
1318
"""
1319
pass
708
1320
709
1321
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
1322
out_signature="s",
711
1323
path_keyword='object_path',
712
1324
connection_keyword='connection')
713
1325
def Introspect(self, object_path, connection):
714
"""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.
715
1329
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1331
object_path,
1332
connection)
718
1333
try:
719
1334
document = xml.dom.minidom.parseString(xmlstring)
1335
720
1336
def make_tag(document, name, prop):
721
1337
e = document.createElement("property")
722
1338
e.setAttribute("name", name)
723
1339
e.setAttribute("type", prop._dbus_signature)
724
1340
e.setAttribute("access", prop._dbus_access)
725
1341
return e
1342
726
1343
for if_tag in document.getElementsByTagName("interface"):
1344
# Add property tags
727
1345
for tag in (make_tag(document, name, prop)
728
1346
for name, prop
729
in self._get_all_dbus_properties()
1347
in self._get_all_dbus_things("property")
730
1348
if prop._dbus_interface
731
1349
== if_tag.getAttribute("name")):
732
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)
733
1367
# Add the names to the return values for the
734
1368
# "org.freedesktop.DBus.Properties" methods
735
1369
if (if_tag.getAttribute("name")
750
1384
except (AttributeError, xml.dom.DOMException,
751
1385
xml.parsers.expat.ExpatError) as error:
752
1386
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
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):
758
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1461
if dt is None:
760
1462
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
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).
768
1488
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
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):
776
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1498
# with the wrong interface name
778
1499
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
781
1502
continue
782
1503
# Create an alternate D-Bus interface name based on
783
1504
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
787
1508
# Is this a D-Bus signal?
788
1509
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
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(
792
1514
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1515
attribute.__closure__))
1516
["func"].cell_contents)
1517
else:
1518
nonmethod_func = attribute
795
1519
# Create a new, but exactly alike, function
796
1520
# object, and decorate it to be a new D-Bus signal
797
1521
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
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
807
1545
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# 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
810
1549
def fixscope(func1, func2):
811
1550
"""This function is a scope container to pass
812
1551
func1 and func2 to the "call_both" function
813
1552
outside of its arguments"""
1553
1554
@functools.wraps(func2)
814
1555
def call_both(*args, **kwargs):
815
1556
"""This function will emit two D-Bus
816
1557
signals by calling func1 and func2"""
817
1558
func1(*args, **kwargs)
818
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
819
1565
return call_both
820
1566
# Create the "call_both" function and add it to
821
1567
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1568
attr[attrname] = fixscope(attribute, new_function)
824
1569
# Is this a D-Bus method?
825
1570
elif getattr(attribute, "_dbus_is_method", False):
826
1571
# Create a new, but exactly alike, function
827
1572
# object. Decorate it to be a new D-Bus method
828
1573
# with the alternate D-Bus interface name. Add it
829
1574
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
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
840
1591
# Is this a D-Bus property?
841
1592
elif getattr(attribute, "_dbus_is_property", False):
842
1593
# Create a new, but exactly alike, function
843
1594
# object, and decorate it to be a new D-Bus
844
1595
# property with the alternate D-Bus interface
845
1596
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
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"})
861
1654
class ClientDBus(Client, DBusObjectWithProperties):
862
1655
"""A Client class using D-Bus
863
1656
867
1660
"""
868
1661
869
1662
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
1663
+ ("dbus_object_path", ))
1664
1665
_interface = "se.recompile.Mandos.Client"
871
1666
872
1667
# dbus.service.Object doesn't use super(), so we can't either.
873
1668
874
1669
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
876
1670
self.bus = bus
877
1671
Client.__init__(self, *args, **kwargs)
878
1672
# Only now, when this client is initialized, can it show up on
879
1673
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1674
client_object_name = str(self.name).translate(
881
1675
{ord("."): ord("_"),
882
1676
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
885
1679
DBusObjectWithProperties.__init__(self, self.bus,
886
1680
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
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):
891
1687
""" Modify a variable so that it's a property which announces
892
1688
its changes to DBus.
893
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1689
1690
transform_fun: Function that takes a value and a variant_level
1691
and transforms it to a D-Bus type.
896
1692
dbus_name: D-Bus name of the variable
897
1693
type_func: Function that transform the value before sending it
898
1694
to the D-Bus. Default: no transform
899
1695
variant_level: D-Bus variant level. Default: 1
900
1696
"""
901
attrname = "_{0}".format(dbus_name)
1697
attrname = "_{}".format(dbus_name)
1698
902
1699
def setter(self, value):
903
1700
if hasattr(self, "dbus_object_path"):
904
1701
if (not hasattr(self, attrname) or
905
1702
type_func(getattr(self, attrname, None))
906
1703
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
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())
911
1719
setattr(self, attrname, value)
912
1720
913
1721
return property(lambda self: getattr(self, attrname), setter)
914
1722
915
916
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1725
"ApprovalPending",
920
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1729
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
926
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1734
"LastCheckedOK")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
928
1737
last_approval_request = notifychangeproperty(
929
1738
datetime_to_dbus, "LastApprovalRequest")
930
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1740
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
936
1744
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1745
dbus.UInt64, "ApprovalDuration",
1746
type_func = lambda td: td.total_seconds() * 1000)
939
1747
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
943
1751
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
1752
dbus.UInt64, "ExtendedTimeout",
1753
type_func = lambda td: td.total_seconds() * 1000)
1754
interval = notifychangeproperty(
1755
dbus.UInt64, "Interval",
1756
type_func = lambda td: td.total_seconds() * 1000)
950
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
951
1760
952
1761
del notifychangeproperty
953
1762
960
1769
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1770
Client.__del__(self, *args, **kwargs)
962
1771
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
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:
969
1779
# Emit D-Bus signal
970
1780
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
972
1783
dbus.String(command))
973
1784
else:
974
1785
# Emit D-Bus signal
975
1786
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1787
dbus.Int64(
1788
# This is specific to GNU libC
1789
(exitstatus << 8)
1790
| self.last_checker_signal),
977
1791
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
1792
return ret
981
1793
982
1794
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1795
old_checker_pid = getattr(self.checker, "pid", None)
988
1796
r = Client.start_checker(self, *args, **kwargs)
989
1797
# Only if new checker process was started
990
1798
if (self.checker is not None
994
1802
return r
995
1803
996
1804
def _reset_approved(self):
997
self._approved = None
1805
self.approved = None
998
1806
return False
999
1807
1000
1808
def approve(self, value=True):
1809
self.approved = value
1810
gobject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
1001
1812
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1813
1008
1814
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1815
1816
## Interfaces
1010
1817
1011
1818
## Signals
1012
1819
1023
1830
pass
1024
1831
1025
1832
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1834
@dbus.service.signal(_interface, signature="sv")
1027
1835
def PropertyChanged(self, property, value):
1028
1836
"D-Bus signal"
1062
1870
self.checked_ok()
1063
1871
1064
1872
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1065
1874
@dbus.service.method(_interface)
1066
1875
def Enable(self):
1067
1876
"D-Bus method"
1068
1877
self.enable()
1069
1878
1070
1879
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1071
1881
@dbus.service.method(_interface)
1072
1882
def StartChecker(self):
1073
1883
"D-Bus method"
1074
1884
self.start_checker()
1075
1885
1076
1886
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1077
1888
@dbus.service.method(_interface)
1078
1889
def Disable(self):
1079
1890
"D-Bus method"
1080
1891
self.disable()
1081
1892
1082
1893
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1083
1895
@dbus.service.method(_interface)
1084
1896
def StopChecker(self):
1085
1897
self.stop_checker()
1092
1904
return dbus.Boolean(bool(self.approvals_pending))
1093
1905
1094
1906
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
1907
@dbus_service_property(_interface,
1908
signature="b",
1096
1909
access="readwrite")
1097
1910
def ApprovedByDefault_dbus_property(self, value=None):
1098
1911
if value is None: # get
1100
1913
self.approved_by_default = bool(value)
1101
1914
1102
1915
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
1916
@dbus_service_property(_interface,
1917
signature="t",
1104
1918
access="readwrite")
1105
1919
def ApprovalDelay_dbus_property(self, value=None):
1106
1920
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1922
* 1000)
1108
1923
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
1924
1110
1925
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
1926
@dbus_service_property(_interface,
1927
signature="t",
1112
1928
access="readwrite")
1113
1929
def ApprovalDuration_dbus_property(self, value=None):
1114
1930
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1932
* 1000)
1117
1933
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
1934
1119
1935
# Name - property
1936
@dbus_annotations(
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1120
1938
@dbus_service_property(_interface, signature="s", access="read")
1121
1939
def Name_dbus_property(self):
1122
1940
return dbus.String(self.name)
1123
1941
1124
1942
# Fingerprint - property
1943
@dbus_annotations(
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1125
1945
@dbus_service_property(_interface, signature="s", access="read")
1126
1946
def Fingerprint_dbus_property(self):
1127
1947
return dbus.String(self.fingerprint)
1128
1948
1129
1949
# Host - property
1130
@dbus_service_property(_interface, signature="s",
1950
@dbus_service_property(_interface,
1951
signature="s",
1131
1952
access="readwrite")
1132
1953
def Host_dbus_property(self, value=None):
1133
1954
if value is None: # get
1134
1955
return dbus.String(self.host)
1135
self.host = value
1956
self.host = str(value)
1136
1957
1137
1958
# Created - property
1959
@dbus_annotations(
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1138
1961
@dbus_service_property(_interface, signature="s", access="read")
1139
1962
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1963
return datetime_to_dbus(self.created)
1141
1964
1142
1965
# LastEnabled - property
1143
1966
@dbus_service_property(_interface, signature="s", access="read")
1145
1968
return datetime_to_dbus(self.last_enabled)
1146
1969
1147
1970
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
1971
@dbus_service_property(_interface,
1972
signature="b",
1149
1973
access="readwrite")
1150
1974
def Enabled_dbus_property(self, value=None):
1151
1975
if value is None: # get
1156
1980
self.disable()
1157
1981
1158
1982
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
1983
@dbus_service_property(_interface,
1984
signature="s",
1160
1985
access="readwrite")
1161
1986
def LastCheckedOK_dbus_property(self, value=None):
1162
1987
if value is not None:
1164
1989
return
1165
1990
return datetime_to_dbus(self.last_checked_ok)
1166
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
1167
1997
# Expires - property
1168
1998
@dbus_service_property(_interface, signature="s", access="read")
1169
1999
def Expires_dbus_property(self):
1175
2005
return datetime_to_dbus(self.last_approval_request)
1176
2006
1177
2007
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
2008
@dbus_service_property(_interface,
2009
signature="t",
1179
2010
access="readwrite")
1180
2011
def Timeout_dbus_property(self, value=None):
1181
2012
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
1183
2015
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
2016
# Reschedule disabling
2017
if self.enabled:
2018
now = datetime.datetime.utcnow()
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
2021
# The timeout has passed
2022
self.disable()
2023
else:
2024
if (getattr(self, "disable_initiator_tag", None)
2025
is None):
2026
return
2027
gobject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = gobject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2030
self.disable)
1205
2031
1206
2032
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
2034
signature="t",
1208
2035
access="readwrite")
1209
2036
def ExtendedTimeout_dbus_property(self, value=None):
1210
2037
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2039
* 1000)
1212
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
2041
1214
2042
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
2043
@dbus_service_property(_interface,
2044
signature="t",
1216
2045
access="readwrite")
1217
2046
def Interval_dbus_property(self, value=None):
1218
2047
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
2049
self.interval = datetime.timedelta(0, 0, 0, value)
1221
2050
if getattr(self, "checker_initiator_tag", None) is None:
1222
2051
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
2052
if self.enabled:
2053
# Reschedule checker run
2054
gobject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = gobject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
1228
2058
1229
2059
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
2060
@dbus_service_property(_interface,
2061
signature="s",
1231
2062
access="readwrite")
1232
2063
def Checker_dbus_property(self, value=None):
1233
2064
if value is None: # get
1234
2065
return dbus.String(self.checker_command)
1235
self.checker_command = value
2066
self.checker_command = str(value)
1236
2067
1237
2068
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
2069
@dbus_service_property(_interface,
2070
signature="b",
1239
2071
access="readwrite")
1240
2072
def CheckerRunning_dbus_property(self, value=None):
1241
2073
if value is None: # get
1246
2078
self.stop_checker()
1247
2079
1248
2080
# ObjectPath - property
2081
@dbus_annotations(
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
1249
2084
@dbus_service_property(_interface, signature="o", access="read")
1250
2085
def ObjectPath_dbus_property(self):
1251
2086
return self.dbus_object_path # is already a dbus.ObjectPath
1252
2087
1253
2088
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
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)
1256
2096
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
2097
self.secret = bytes(value)
1258
2098
1259
2099
del _interface
1260
2100
1264
2104
self._pipe = child_pipe
1265
2105
self._pipe.send(('init', fpr, address))
1266
2106
if not self._pipe.recv():
1267
raise KeyError()
2107
raise KeyError(fpr)
1268
2108
1269
2109
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2110
if name == '_pipe':
1271
2111
return super(ProxyClient, self).__getattribute__(name)
1272
2112
self._pipe.send(('getattr', name))
1273
2113
data = self._pipe.recv()
1274
2114
if data[0] == 'data':
1275
2115
return data[1]
1276
2116
if data[0] == 'function':
2117
1277
2118
def func(*args, **kwargs):
1278
2119
self._pipe.send(('funcall', name, args, kwargs))
1279
2120
return self._pipe.recv()[1]
2121
1280
2122
return func
1281
2123
1282
2124
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2125
if name == '_pipe':
1284
2126
return super(ProxyClient, self).__setattr__(name, value)
1285
2127
self._pipe.send(('setattr', name, value))
1286
2128
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
2129
1290
2130
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2131
"""A class to handle client connections.
1296
2136
def handle(self):
1297
2137
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2138
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2139
str(self.client_address))
1300
2140
logger.debug("Pipe FD: %d",
1301
2141
self.server.child_pipe.fileno())
1302
2142
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1307
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
2143
session = gnutls.ClientSession(self.request)
1312
2144
1313
2145
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
2146
# "+AES-256-CBC", "+SHA1",
1318
2150
priority = self.server.gnutls_priority
1319
2151
if priority is None:
1320
2152
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
2153
gnutls.priority_set_direct(session._c_object, priority,
2154
None)
1324
2155
1325
2156
# Start communication using the Mandos protocol
1326
2157
# Get protocol number
1328
2159
logger.debug("Protocol version: %r", line)
1329
2160
try:
1330
2161
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
2162
raise RuntimeError(line)
1332
2163
except (ValueError, IndexError, RuntimeError) as error:
1333
2164
logger.error("Unknown protocol version: %s", error)
1334
2165
return
1336
2167
# Start GnuTLS connection
1337
2168
try:
1338
2169
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2170
except gnutls.Error as error:
1340
2171
logger.warning("Handshake failed: %s", error)
1341
2172
# Do not run session.bye() here: the session is not
1342
2173
# established. Just abandon the request.
1346
2177
approval_required = False
1347
2178
try:
1348
2179
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1351
except (TypeError,
1352
gnutls.errors.GNUTLSError) as error:
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
1353
2183
logger.warning("Bad certificate: %s", error)
1354
2184
return
1355
2185
logger.debug("Fingerprint: %s", fpr)
1368
2198
while True:
1369
2199
if not client.enabled:
1370
2200
logger.info("Client %s is disabled",
1371
client.name)
2201
client.name)
1372
2202
if self.server.use_dbus:
1373
2203
# Emit D-Bus signal
1374
2204
client.Rejected("Disabled")
1375
2205
return
1376
2206
1377
if client._approved or not client.approval_delay:
2207
if client.approved or not client.approval_delay:
1378
2208
#We are approved or approval is disabled
1379
2209
break
1380
elif client._approved is None:
2210
elif client.approved is None:
1381
2211
logger.info("Client %s needs approval",
1382
2212
client.name)
1383
2213
if self.server.use_dbus:
1384
2214
# Emit D-Bus signal
1385
2215
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
1388
2218
else:
1389
2219
logger.warning("Client %s was not approved",
1390
2220
client.name)
1394
2224
return
1395
2225
1396
2226
#wait until timeout or approved
1397
#x = float(client
1398
# ._timedelta_to_milliseconds(delay))
1399
2227
time = datetime.datetime.now()
1400
2228
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2229
client.changedstate.wait(delay.total_seconds())
1404
2230
client.changedstate.release()
1405
2231
time2 = datetime.datetime.now()
1406
2232
if (time2 - time) >= delay:
1417
2243
else:
1418
2244
delay -= time2 - time
1419
2245
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
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
1431
2252
1432
2253
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
2254
# bump the timeout using extended_timeout
2255
client.bump_timeout(client.extended_timeout)
1435
2256
if self.server.use_dbus:
1436
2257
# Emit D-Bus signal
1437
2258
client.GotSecret()
1441
2262
client.approvals_pending -= 1
1442
2263
try:
1443
2264
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
2267
exc_info=error)
1446
2268
1447
2269
@staticmethod
1448
2270
def peer_certificate(session):
1449
2271
"Return the peer's OpenPGP certificate as a bytestring"
1450
2272
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
2276
return b""
1456
2277
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2278
cert_list = (gnutls.certificate_get_peers
1459
2279
(session._c_object, ctypes.byref(list_size)))
1460
2280
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2281
raise gnutls.Error("error getting peer certificate")
1463
2282
if list_size.value == 0:
1464
2283
return None
1465
2284
cert = cert_list[0]
1469
2288
def fingerprint(openpgp):
1470
2289
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2290
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
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)))
1477
2295
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2298
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1486
2301
# Verify the self signature in the key
1487
2302
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1491
2305
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1495
2308
# New buffer for the fingerprint
1496
2309
buf = ctypes.create_string_buffer(20)
1497
2310
buf_len = ctypes.c_size_t()
1498
2311
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1502
2314
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2315
gnutls.openpgp_crt_deinit(crt)
1504
2316
# Convert the buffer to a Python bytestring
1505
2317
fpr = ctypes.string_at(buf, buf_len.value)
1506
2318
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2319
hex_fpr = binascii.hexlify(fpr).upper()
1508
2320
return hex_fpr
1509
2321
1510
2322
1511
2323
class MultiprocessingMixIn(object):
1512
2324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2325
1513
2326
def sub_process_main(self, request, address):
1514
2327
try:
1515
2328
self.finish_request(request, address)
1516
except:
2329
except Exception:
1517
2330
self.handle_error(request, address)
1518
2331
self.close_request(request)
1519
2332
1520
2333
def process_request(self, request, address):
1521
2334
"""Start a new process to process the request."""
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
2337
proc.start()
2338
return proc
1524
2339
1525
2340
1526
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1527
2342
""" adds a pipe to the MixIn """
2343
1528
2344
def process_request(self, request, client_address):
1529
2345
"""Overrides and wraps the original process_request().
1530
2346
1532
2348
"""
1533
2349
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1534
2350
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
2351
proc = MultiprocessingMixIn.process_request(self, request,
2352
client_address)
1537
2353
self.child_pipe.close()
1538
self.add_pipe(parent_pipe)
2354
self.add_pipe(parent_pipe, proc)
1539
2355
1540
def add_pipe(self, parent_pipe):
2356
def add_pipe(self, parent_pipe, proc):
1541
2357
"""Dummy function; override as necessary"""
1542
raise NotImplementedError
2358
raise NotImplementedError()
1543
2359
1544
2360
1545
2361
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1551
2367
interface: None or a network interface name (string)
1552
2368
use_ipv6: Boolean; to use IPv6 or not
1553
2369
"""
2370
1554
2371
def __init__(self, server_address, RequestHandlerClass,
1555
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
"""
1556
2378
self.interface = interface
1557
2379
if use_ipv6:
1558
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.
1559
2407
socketserver.TCPServer.__init__(self, server_address,
1560
2408
RequestHandlerClass)
2409
1561
2410
def server_bind(self):
1562
2411
"""This overrides the normal server_bind() function
1563
2412
to bind to an interface if one was specified, and also NOT to
1569
2418
self.interface)
1570
2419
else:
1571
2420
try:
1572
self.socket.setsockopt(socket.SOL_SOCKET,
1573
SO_BINDTODEVICE,
1574
str(self.interface
1575
+ '\0'))
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
1576
2424
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1580
self.interface)
1581
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:
1582
2429
logger.error("SO_BINDTODEVICE not available;"
1583
2430
" cannot bind to interface %s",
1584
2431
self.interface)
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
1585
2435
else:
1586
2436
raise
1587
2437
# Only bind(2) the socket if we really need to.
1590
2440
if self.address_family == socket.AF_INET6:
1591
2441
any_address = "::" # in6addr_any
1592
2442
else:
1593
any_address = socket.INADDR_ANY
2443
any_address = "0.0.0.0" # INADDR_ANY
1594
2444
self.server_address = (any_address,
1595
2445
self.server_address[1])
1596
2446
elif not self.server_address[1]:
1597
self.server_address = (self.server_address[0],
1598
0)
2447
self.server_address = (self.server_address[0], 0)
1599
2448
# if self.interface:
1600
2449
# self.server_address = (self.server_address[0],
1601
2450
# 0, # port
1615
2464
1616
2465
Assumes a gobject.MainLoop event loop.
1617
2466
"""
2467
1618
2468
def __init__(self, server_address, RequestHandlerClass,
1619
interface=None, use_ipv6=True, clients=None,
1620
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):
1621
2475
self.enabled = False
1622
2476
self.clients = clients
1623
2477
if self.clients is None:
1624
self.clients = set()
2478
self.clients = {}
1625
2479
self.use_dbus = use_dbus
1626
2480
self.gnutls_priority = gnutls_priority
1627
2481
IPv6_TCPServer.__init__(self, server_address,
1628
2482
RequestHandlerClass,
1629
2483
interface = interface,
1630
use_ipv6 = use_ipv6)
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1631
2487
def server_activate(self):
1632
2488
if self.enabled:
1633
2489
return socketserver.TCPServer.server_activate(self)
2490
1634
2491
def enable(self):
1635
2492
self.enabled = True
1636
def add_pipe(self, parent_pipe):
2493
2494
def add_pipe(self, parent_pipe, proc):
1637
2495
# Call "handle_ipc" for both data and EOF events
1638
gobject.io_add_watch(parent_pipe.fileno(),
1639
gobject.IO_IN | gobject.IO_HUP,
1640
functools.partial(self.handle_ipc,
1641
parent_pipe =
1642
parent_pipe))
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))
1643
2502
1644
def handle_ipc(self, source, condition, parent_pipe=None,
2503
def handle_ipc(self, source, condition,
2504
parent_pipe=None,
2505
proc = None,
1645
2506
client_object=None):
1646
condition_names = {
1647
gobject.IO_IN: "IN", # There is data to read.
1648
gobject.IO_OUT: "OUT", # Data can be written (without
1649
# blocking).
1650
gobject.IO_PRI: "PRI", # There is urgent data to read.
1651
gobject.IO_ERR: "ERR", # Error condition.
1652
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1653
# broken, usually for pipes and
1654
# sockets).
1655
}
1656
conditions_string = ' | '.join(name
1657
for cond, name in
1658
condition_names.iteritems()
1659
if cond & condition)
1660
# error or the other end of multiprocessing.Pipe has closed
1661
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2507
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2509
# Wait for other process to exit
2510
proc.join()
1662
2511
return False
1663
2512
1664
2513
# Read a request from the child
1669
2518
fpr = request[1]
1670
2519
address = request[2]
1671
2520
1672
for c in self.clients:
2521
for c in self.clients.itervalues():
1673
2522
if c.fingerprint == fpr:
1674
2523
client = c
1675
2524
break
1683
2532
parent_pipe.send(False)
1684
2533
return False
1685
2534
1686
gobject.io_add_watch(parent_pipe.fileno(),
1687
gobject.IO_IN | gobject.IO_HUP,
1688
functools.partial(self.handle_ipc,
1689
parent_pipe =
1690
parent_pipe,
1691
client_object =
1692
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))
1693
2542
parent_pipe.send(True)
1694
2543
# remove the old hook in favor of the new above hook on
1695
2544
# same fileno
1701
2550
1702
2551
parent_pipe.send(('data', getattr(client_object,
1703
2552
funcname)(*args,
1704
**kwargs)))
2553
**kwargs)))
1705
2554
1706
2555
if command == 'getattr':
1707
2556
attrname = request[1]
1708
if callable(client_object.__getattribute__(attrname)):
1709
parent_pipe.send(('function',))
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
1710
2560
else:
1711
parent_pipe.send(('data', client_object
1712
.__getattribute__(attrname)))
2561
parent_pipe.send((
2562
'data', client_object.__getattribute__(attrname)))
1713
2563
1714
2564
if command == 'setattr':
1715
2565
attrname = request[1]
1719
2569
return True
1720
2570
1721
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
1722
2668
def string_to_delta(interval):
1723
2669
"""Parse a string and return a datetime.timedelta
1724
2670
1735
2681
>>> string_to_delta('5m 30s')
1736
2682
datetime.timedelta(0, 330)
1737
2683
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
1738
2690
timevalue = datetime.timedelta(0)
1739
2691
for s in interval.split():
1740
2692
try:
1741
suffix = unicode(s[-1])
2693
suffix = s[-1]
1742
2694
value = int(s[:-1])
1743
2695
if suffix == "d":
1744
2696
delta = datetime.timedelta(value)
1751
2703
elif suffix == "w":
1752
2704
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1753
2705
else:
1754
raise ValueError("Unknown suffix %r" % suffix)
1755
except (ValueError, IndexError) as e:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
1756
2708
raise ValueError(*(e.args))
1757
2709
timevalue += delta
1758
2710
return timevalue
1759
2711
1760
2712
1761
def if_nametoindex(interface):
1762
"""Call the C function if_nametoindex(), or equivalent
1763
1764
Note: This function cannot accept a unicode string."""
1765
global if_nametoindex
1766
try:
1767
if_nametoindex = (ctypes.cdll.LoadLibrary
1768
(ctypes.util.find_library("c"))
1769
.if_nametoindex)
1770
except (OSError, AttributeError):
1771
logger.warning("Doing if_nametoindex the hard way")
1772
def if_nametoindex(interface):
1773
"Get an interface index the hard way, i.e. using fcntl()"
1774
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1775
with contextlib.closing(socket.socket()) as s:
1776
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1777
struct.pack(str("16s16x"),
1778
interface))
1779
interface_index = struct.unpack(str("I"),
1780
ifreq[16:20])[0]
1781
return interface_index
1782
return if_nametoindex(interface)
1783
1784
1785
2713
def daemon(nochdir = False, noclose = False):
1786
2714
"""See daemon(3). Standard BSD Unix function.
1787
2715
1795
2723
sys.exit()
1796
2724
if not noclose:
1797
2725
# Close all standard open file descriptors
1798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1799
2727
if not stat.S_ISCHR(os.fstat(null).st_mode):
1800
2728
raise OSError(errno.ENODEV,
1801
"%s not a character device"
1802
% os.path.devnull)
2729
"{} not a character device"
2730
.format(os.devnull))
1803
2731
os.dup2(null, sys.stdin.fileno())
1804
2732
os.dup2(null, sys.stdout.fileno())
1805
2733
os.dup2(null, sys.stderr.fileno())
1814
2742
1815
2743
parser = argparse.ArgumentParser()
1816
2744
parser.add_argument("-v", "--version", action="version",
1817
version = "%%(prog)s %s" % version,
2745
version = "%(prog)s {}".format(version),
1818
2746
help="show version number and exit")
1819
2747
parser.add_argument("-i", "--interface", metavar="IF",
1820
2748
help="Bind to interface IF")
1826
2754
help="Run self-test")
1827
2755
parser.add_argument("--debug", action="store_true",
1828
2756
help="Debug mode; run in foreground and log"
1829
" to terminal")
2757
" to terminal", default=None)
1830
2758
parser.add_argument("--debuglevel", metavar="LEVEL",
1831
2759
help="Debug level for stdout output")
1832
2760
parser.add_argument("--priority", help="GnuTLS"
1839
2767
" files")
1840
2768
parser.add_argument("--no-dbus", action="store_false",
1841
2769
dest="use_dbus", help="Do not provide D-Bus"
1842
" system bus interface")
2770
" system bus interface", default=None)
1843
2771
parser.add_argument("--no-ipv6", action="store_false",
1844
dest="use_ipv6", help="Do not use IPv6")
2772
dest="use_ipv6", help="Do not use IPv6",
2773
default=None)
2774
parser.add_argument("--no-restore", action="store_false",
2775
dest="restore", help="Do not restore stored"
2776
" state", default=None)
2777
parser.add_argument("--socket", type=int,
2778
help="Specify a file descriptor to a network"
2779
" socket to use instead of creating one")
2780
parser.add_argument("--statedir", metavar="DIR",
2781
help="Directory to save/restore state in")
2782
parser.add_argument("--foreground", action="store_true",
2783
help="Run in foreground", default=None)
2784
parser.add_argument("--no-zeroconf", action="store_false",
2785
dest="zeroconf", help="Do not use Zeroconf",
2786
default=None)
2787
1845
2788
options = parser.parse_args()
1846
2789
1847
2790
if options.check:
1848
2791
import doctest
1849
doctest.testmod()
1850
sys.exit()
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
1851
2794
1852
2795
# Default values for config file for server-global settings
1853
2796
server_defaults = { "interface": "",
1855
2798
"port": "",
1856
2799
"debug": "False",
1857
2800
"priority":
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
1859
2803
"servicename": "Mandos",
1860
2804
"use_dbus": "True",
1861
2805
"use_ipv6": "True",
1862
2806
"debuglevel": "",
1863
}
2807
"restore": "True",
2808
"socket": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2811
"zeroconf": "True",
2812
}
1864
2813
1865
2814
# Parse config file for server-global settings
1866
2815
server_config = configparser.SafeConfigParser(server_defaults)
1867
2816
del server_defaults
1868
server_config.read(os.path.join(options.configdir,
1869
"mandos.conf"))
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1870
2818
# Convert the SafeConfigParser object to a dict
1871
2819
server_settings = server_config.defaults()
1872
2820
# Use the appropriate methods on the non-string config options
1873
for option in ("debug", "use_dbus", "use_ipv6"):
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1874
2822
server_settings[option] = server_config.getboolean("DEFAULT",
1875
2823
option)
1876
2824
if server_settings["port"]:
1877
2825
server_settings["port"] = server_config.getint("DEFAULT",
1878
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"])
1879
2836
del server_config
1880
2837
1881
2838
# Override the settings from the config file with command line
1882
2839
# options, if set.
1883
2840
for option in ("interface", "address", "port", "debug",
1884
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
1886
2844
value = getattr(options, option)
1887
2845
if value is not None:
1888
2846
server_settings[option] = value
1889
2847
del options
1890
2848
# Force all strings to be unicode
1891
2849
for option in server_settings.keys():
1892
if type(server_settings[option]) is str:
1893
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
1894
2860
# Now we have our good server settings in "server_settings"
1895
2861
1896
2862
##################################################################
1897
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
1898
2869
# For convenience
1899
2870
debug = server_settings["debug"]
1900
2871
debuglevel = server_settings["debuglevel"]
1901
2872
use_dbus = server_settings["use_dbus"]
1902
2873
use_ipv6 = server_settings["use_ipv6"]
2874
stored_state_path = os.path.join(server_settings["statedir"],
2875
stored_state_file)
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2878
2879
if debug:
2880
initlogger(debug, logging.DEBUG)
2881
else:
2882
if not debuglevel:
2883
initlogger(debug)
2884
else:
2885
level = getattr(logging, debuglevel.upper())
2886
initlogger(debug, level)
1903
2887
1904
2888
if server_settings["servicename"] != "Mandos":
1905
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
1909
2893
1910
2894
# Parse config file with clients
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1913
"interval": "2m",
1914
"checker": "fping -q -- %%(host)s",
1915
"host": "",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1918
}
1919
client_config = configparser.SafeConfigParser(client_defaults)
2895
client_config = configparser.SafeConfigParser(Client
2896
.client_defaults)
1920
2897
client_config.read(os.path.join(server_settings["configdir"],
1921
2898
"clients.conf"))
1922
2899
1923
2900
global mandos_dbus_service
1924
2901
mandos_dbus_service = None
1925
2902
1926
tcp_server = MandosServer((server_settings["address"],
1927
server_settings["port"]),
1928
ClientHandler,
1929
interface=(server_settings["interface"]
1930
or None),
1931
use_ipv6=use_ipv6,
1932
gnutls_priority=
1933
server_settings["priority"],
1934
use_dbus=use_dbus)
1935
if not debug:
1936
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
1937
2919
try:
1938
pidfile = open(pidfilename, "w")
1939
except IOError:
1940
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)
1941
2924
1942
try:
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1945
except KeyError:
2925
for name, group in (("_mandos", "_mandos"),
2926
("mandos", "mandos"),
2927
("nobody", "nogroup")):
1946
2928
try:
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
2929
uid = pwd.getpwnam(name).pw_uid
2930
gid = pwd.getpwnam(group).pw_gid
2931
break
1949
2932
except KeyError:
1950
try:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
1953
except KeyError:
1954
uid = 65534
1955
gid = 65534
2933
continue
2934
else:
2935
uid = 65534
2936
gid = 65534
1956
2937
try:
1957
2938
os.setgid(gid)
1958
2939
os.setuid(uid)
1959
2940
except OSError as error:
1960
if error[0] != errno.EPERM:
1961
raise error
1962
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1966
if debuglevel:
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
2941
if error.errno != errno.EPERM:
2942
raise
1970
2943
1971
2944
if debug:
1972
2945
# Enable all possible GnuTLS debugging
1973
2946
1974
2947
# "Use a log level over 10 to enable all debugging options."
1975
2948
# - GnuTLS manual
1976
gnutls.library.functions.gnutls_global_set_log_level(11)
2949
gnutls.global_set_log_level(11)
1977
2950
1978
@gnutls.library.types.gnutls_log_func
2951
@gnutls.log_func
1979
2952
def debug_gnutls(level, string):
1980
2953
logger.debug("GnuTLS: %s", string[:-1])
1981
2954
1982
(gnutls.library.functions
1983
.gnutls_global_set_log_function(debug_gnutls))
2955
gnutls.global_set_log_function(debug_gnutls)
1984
2956
1985
2957
# Redirect stdin so all checkers get /dev/null
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2958
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1987
2959
os.dup2(null, sys.stdin.fileno())
1988
2960
if null > 2:
1989
2961
os.close(null)
1990
else:
1991
# No console logging
1992
logger.removeHandler(console)
1993
2962
1994
2963
# Need to fork before connecting to D-Bus
1995
if not debug:
2964
if not foreground:
1996
2965
# Close all input and output, do double fork, etc.
1997
2966
daemon()
1998
2967
2968
# multiprocessing will use threads, so before we use gobject we
2969
# need to inform gobject that threads will be used.
2970
gobject.threads_init()
2971
1999
2972
global main_loop
2000
2973
# From the Avahi example code
2001
DBusGMainLoop(set_as_default=True )
2974
DBusGMainLoop(set_as_default=True)
2002
2975
main_loop = gobject.MainLoop()
2003
2976
bus = dbus.SystemBus()
2004
2977
# End of Avahi example code
2005
2978
if use_dbus:
2006
2979
try:
2007
2980
bus_name = dbus.service.BusName("se.recompile.Mandos",
2008
bus, do_not_queue=True)
2009
old_bus_name = (dbus.service.BusName
2010
("se.bsnet.fukt.Mandos", bus,
2011
do_not_queue=True))
2012
except dbus.exceptions.NameExistsException as e:
2013
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)
2014
2988
use_dbus = False
2015
2989
server_settings["use_dbus"] = False
2016
2990
tcp_server.use_dbus = False
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(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"))
2024
3001
2025
3002
global multiprocessing_manager
2026
3003
multiprocessing_manager = multiprocessing.Manager()
2027
3004
2028
3005
client_class = Client
2029
3006
if use_dbus:
2030
client_class = functools.partial(ClientDBusTransitional,
2031
bus = bus)
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2037
}
2038
for name, value in config.items(section):
3007
client_class = functools.partial(ClientDBus, bus = bus)
3008
3009
client_settings = Client.config_parser(client_config)
3010
old_client_settings = {}
3011
clients_data = {}
3012
3013
# This is used to redirect stdout and stderr for checker processes
3014
global wnull
3015
wnull = open(os.devnull, "w") # A writable /dev/null
3016
# Only used if server is running in foreground but not in debug
3017
# mode
3018
if debug or not foreground:
3019
wnull.close()
3020
3021
# Get client data and settings from last running state.
3022
if server_settings["restore"]:
3023
try:
3024
with open(stored_state_path, "rb") as stored_state:
3025
clients_data, old_client_settings = pickle.load(
3026
stored_state)
3027
os.remove(stored_state_path)
3028
except IOError as e:
3029
if e.errno == errno.ENOENT:
3030
logger.warning("Could not load persistent state:"
3031
" {}".format(os.strerror(e.errno)))
3032
else:
3033
logger.critical("Could not load persistent state:",
3034
exc_info=e)
3035
raise
3036
except EOFError as e:
3037
logger.warning("Could not load persistent state: "
3038
"EOFError:",
3039
exc_info=e)
3040
3041
with PGPEngine() as pgp:
3042
for client_name, client in clients_data.items():
3043
# Skip removed clients
3044
if client_name not in client_settings:
3045
continue
3046
3047
# Decide which value to use after restoring saved state.
3048
# We have three different values: Old config file,
3049
# new config file, and saved state.
3050
# New config value takes precedence if it differs from old
3051
# config value, otherwise use saved state.
3052
for name, value in client_settings[client_name].items():
3053
try:
3054
# For each value in new config, check if it
3055
# differs from the old config value (Except for
3056
# the "secret" attribute)
3057
if (name != "secret"
3058
and (value !=
3059
old_client_settings[client_name][name])):
3060
client[name] = value
3061
except KeyError:
3062
pass
3063
3064
# Clients who has passed its expire date can still be
3065
# enabled if its last checker was successful. A Client
3066
# whose checker succeeded before we stored its state is
3067
# assumed to have successfully run all checkers during
3068
# downtime.
3069
if client["enabled"]:
3070
if datetime.datetime.utcnow() >= client["expires"]:
3071
if not client["last_checked_ok"]:
3072
logger.warning(
3073
"disabling client {} - Client never "
3074
"performed a successful checker".format(
3075
client_name))
3076
client["enabled"] = False
3077
elif client["last_checker_status"] != 0:
3078
logger.warning(
3079
"disabling client {} - Client last"
3080
" checker failed with error code"
3081
" {}".format(
3082
client_name,
3083
client["last_checker_status"]))
3084
client["enabled"] = False
3085
else:
3086
client["expires"] = (
3087
datetime.datetime.utcnow()
3088
+ client["timeout"])
3089
logger.debug("Last checker succeeded,"
3090
" keeping {} enabled".format(
3091
client_name))
2039
3092
try:
2040
yield (name, special_settings[name]())
2041
except KeyError:
2042
yield (name, value)
2043
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
3093
client["secret"] = pgp.decrypt(
3094
client["encrypted_secret"],
3095
client_settings[client_name]["secret"])
3096
except PGPError:
3097
# If decryption fails, we use secret from new settings
3098
logger.debug("Failed to decrypt {} old secret".format(
3099
client_name))
3100
client["secret"] = (client_settings[client_name]
3101
["secret"])
3102
3103
# Add/remove clients based on new changes made to config
3104
for client_name in (set(old_client_settings)
3105
- set(client_settings)):
3106
del clients_data[client_name]
3107
for client_name in (set(client_settings)
3108
- set(old_client_settings)):
3109
clients_data[client_name] = client_settings[client_name]
3110
3111
# Create all client objects
3112
for client_name, client in clients_data.items():
3113
tcp_server.clients[client_name] = client_class(
3114
name = client_name,
3115
settings = client,
3116
server_settings = server_settings)
3117
2049
3118
if not tcp_server.clients:
2050
3119
logger.warning("No clients defined")
2051
2052
if not debug:
2053
try:
2054
with pidfile:
2055
pid = os.getpid()
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2057
del pidfile
2058
except IOError:
2059
logger.error("Could not write to file %r with PID %d",
2060
pidfilename, pid)
2061
except NameError:
2062
# "pidfile" was never created
2063
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
2064
3131
del pidfilename
2065
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2067
3132
2068
3133
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
3134
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2070
3135
2071
3136
if use_dbus:
2072
class MandosDBusService(dbus.service.Object):
3137
3138
@alternate_dbus_interfaces(
3139
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3140
class MandosDBusService(DBusObjectWithObjectManager):
2073
3141
"""A D-Bus proxy object"""
3142
2074
3143
def __init__(self):
2075
3144
dbus.service.Object.__init__(self, bus, "/")
3145
2076
3146
_interface = "se.recompile.Mandos"
2077
3147
2078
3148
@dbus.service.signal(_interface, signature="o")
2085
3155
"D-Bus signal"
2086
3156
pass
2087
3157
3158
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3159
"true"})
2088
3160
@dbus.service.signal(_interface, signature="os")
2089
3161
def ClientRemoved(self, objpath, name):
2090
3162
"D-Bus signal"
2091
3163
pass
2092
3164
3165
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3166
"true"})
2093
3167
@dbus.service.method(_interface, out_signature="ao")
2094
3168
def GetAllClients(self):
2095
3169
"D-Bus method"
2096
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
3170
return dbus.Array(c.dbus_object_path for c in
3171
tcp_server.clients.itervalues())
2098
3172
3173
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3174
"true"})
2099
3175
@dbus.service.method(_interface,
2100
3176
out_signature="a{oa{sv}}")
2101
3177
def GetAllClientsWithProperties(self):
2102
3178
"D-Bus method"
2103
3179
return dbus.Dictionary(
2104
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
3180
{ c.dbus_object_path: c.GetAll(
3181
"se.recompile.Mandos.Client")
3182
for c in tcp_server.clients.itervalues() },
2106
3183
signature="oa{sv}")
2107
3184
2108
3185
@dbus.service.method(_interface, in_signature="o")
2109
3186
def RemoveClient(self, object_path):
2110
3187
"D-Bus method"
2111
for c in tcp_server.clients:
3188
for c in tcp_server.clients.itervalues():
2112
3189
if c.dbus_object_path == object_path:
2113
tcp_server.clients.remove(c)
3190
del tcp_server.clients[c.name]
2114
3191
c.remove_from_connection()
2115
# Don't signal anything except ClientRemoved
3192
# Don't signal the disabling
2116
3193
c.disable(quiet=True)
2117
# Emit D-Bus signal
2118
self.ClientRemoved(object_path, c.name)
3194
# Emit D-Bus signal for removal
3195
self.client_removed_signal(c)
2119
3196
return
2120
3197
raise KeyError(object_path)
2121
3198
2122
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)
2123
3236
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
3237
mandos_dbus_service = MandosDBusService()
2127
3238
2128
3239
def cleanup():
2129
3240
"Cleanup function; run on exit"
2130
service.cleanup()
2131
3241
if zeroconf:
3242
service.cleanup()
3243
3244
multiprocessing.active_children()
3245
wnull.close()
3246
if not (tcp_server.clients or client_settings):
3247
return
3248
3249
# Store client before exiting. Secrets are encrypted with key
3250
# based on what config file has. If config file is
3251
# removed/edited, old secret will thus be unrecovable.
3252
clients = {}
3253
with PGPEngine() as pgp:
3254
for client in tcp_server.clients.itervalues():
3255
key = client_settings[client.name]["secret"]
3256
client.encrypted_secret = pgp.encrypt(client.secret,
3257
key)
3258
client_dict = {}
3259
3260
# A list of attributes that can not be pickled
3261
# + secret.
3262
exclude = { "bus", "changedstate", "secret",
3263
"checker", "server_settings" }
3264
for name, typ in inspect.getmembers(dbus.service
3265
.Object):
3266
exclude.add(name)
3267
3268
client_dict["encrypted_secret"] = (client
3269
.encrypted_secret)
3270
for attr in client.client_structure:
3271
if attr not in exclude:
3272
client_dict[attr] = getattr(client, attr)
3273
3274
clients[client.name] = client_dict
3275
del client_settings[client.name]["secret"]
3276
3277
try:
3278
with tempfile.NamedTemporaryFile(
3279
mode='wb',
3280
suffix=".pickle",
3281
prefix='clients-',
3282
dir=os.path.dirname(stored_state_path),
3283
delete=False) as stored_state:
3284
pickle.dump((clients, client_settings), stored_state)
3285
tempname = stored_state.name
3286
os.rename(tempname, stored_state_path)
3287
except (IOError, OSError) as e:
3288
if not debug:
3289
try:
3290
os.remove(tempname)
3291
except NameError:
3292
pass
3293
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3294
logger.warning("Could not save persistent state: {}"
3295
.format(os.strerror(e.errno)))
3296
else:
3297
logger.warning("Could not save persistent state:",
3298
exc_info=e)
3299
raise
3300
3301
# Delete all clients, and settings from config
2132
3302
while tcp_server.clients:
2133
client = tcp_server.clients.pop()
3303
name, client = tcp_server.clients.popitem()
2134
3304
if use_dbus:
2135
3305
client.remove_from_connection()
2136
client.disable_hook = None
2137
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2138
3307
client.disable(quiet=True)
3308
# Emit D-Bus signal for removal
2139
3309
if use_dbus:
2140
# Emit D-Bus signal
2141
mandos_dbus_service.ClientRemoved(client
2142
.dbus_object_path,
2143
client.name)
3310
mandos_dbus_service.client_removed_signal(client)
3311
client_settings.clear()
2144
3312
2145
3313
atexit.register(cleanup)
2146
3314
2147
for client in tcp_server.clients:
3315
for client in tcp_server.clients.itervalues():
2148
3316
if use_dbus:
2149
# Emit D-Bus signal
2150
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2151
client.enable()
3317
# Emit D-Bus signal for adding
3318
mandos_dbus_service.client_added_signal(client)
3319
# Need to initiate checking of clients
3320
if client.enabled:
3321
client.init_checker()
2152
3322
2153
3323
tcp_server.enable()
2154
3324
tcp_server.server_activate()
2155
3325
2156
3326
# Find out what port we got
2157
service.port = tcp_server.socket.getsockname()[1]
3327
if zeroconf:
3328
service.port = tcp_server.socket.getsockname()[1]
2158
3329
if use_ipv6:
2159
3330
logger.info("Now listening on address %r, port %d,"
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
3331
" flowinfo %d, scope_id %d",
3332
*tcp_server.socket.getsockname())
2162
3333
else: # IPv4
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
3334
logger.info("Now listening on address %r, port %d",
3335
*tcp_server.socket.getsockname())
2165
3336
2166
3337
#service.interface = tcp_server.socket.getsockname()[3]
2167
3338
2168
3339
try:
2169
# From the Avahi example code
2170
try:
2171
service.activate()
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2174
cleanup()
2175
sys.exit(1)
2176
# 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
2177
3349
2178
3350
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
3351
lambda *args, **kwargs:
2183
3355
logger.debug("Starting main loop")
2184
3356
main_loop.run()
2185
3357
except AvahiError as error:
2186
logger.critical("AvahiError: %s", error)
3358
logger.critical("Avahi Error", exc_info=error)
2187
3359
cleanup()
2188
3360
sys.exit(1)
2189
3361
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0