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- Committer: Teddy Hogeborn
- Date: 2016-02-28 10:59:18 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 331.
- Revision ID: teddy@recompile.se-20160228105918-tb8pt2p5j0tkcls3
Handle GnuTLS errors and partial sends in gnutls "module".
* mandos (GnuTLS.E_INTERRUPTED, GnuTLS.E_AGAIN): New.
(GnuTLS.Error): Set error code as "code" attribute.
(GnuTLS.ClientSession.send): Handle partial sends with a loop.
(GnuTLS._retry_on_error): New function.
(GnuTLS.record_send, GnuTLS.handshake, GnuTLS.bye): Set "errcheck"
attribute to
"_retry_on_error".
(ClientHandler.handle): Remove loop for handling partial sends;
GnuTLS.ClientSession.send() will do that.
* mandos (GnuTLS.E_INTERRUPTED, GnuTLS.E_AGAIN): New.
(GnuTLS.Error): Set error code as "code" attribute.
(GnuTLS.ClientSession.send): Handle partial sends with a loop.
(GnuTLS._retry_on_error): New function.
(GnuTLS.record_send, GnuTLS.handshake, GnuTLS.bye): Set "errcheck"
attribute to
"_retry_on_error".
(ClientHandler.handle): Remove loop for handling partial sends;
GnuTLS.ClientSession.send() will do that.
- files added:
- debian/mandos-client.examples
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2010 Teddy Hogeborn
15
# Copyright © 2008-2010 Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 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
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
37
43
import socket
38
import optparse
44
import argparse
39
45
import datetime
40
46
import errno
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser as configparser
47
try:
48
import ConfigParser as configparser
49
except ImportError:
50
import configparser
48
51
import sys
49
52
import re
50
53
import os
59
62
import struct
60
63
import fcntl
61
64
import functools
62
import cPickle as pickle
65
try:
66
import cPickle as pickle
67
except ImportError:
68
import pickle
63
69
import multiprocessing
70
import types
71
import binascii
72
import tempfile
73
import itertools
74
import collections
75
import codecs
64
76
65
77
import dbus
66
78
import dbus.service
67
import gobject
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
68
83
import avahi
69
84
from dbus.mainloop.glib import DBusGMainLoop
70
85
import ctypes
80
95
except ImportError:
81
96
SO_BINDTODEVICE = None
82
97
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
94
logger.addHandler(syslogger)
95
96
console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
100
logger.addHandler(console)
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.1"
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.gnupgargs = ['--batch',
155
'--home', self.tempdir,
156
'--force-mdc',
157
'--quiet',
158
'--no-use-agent']
159
160
def __enter__(self):
161
return self
162
163
def __exit__(self, exc_type, exc_value, traceback):
164
self._cleanup()
165
return False
166
167
def __del__(self):
168
self._cleanup()
169
170
def _cleanup(self):
171
if self.tempdir is not None:
172
# Delete contents of tempdir
173
for root, dirs, files in os.walk(self.tempdir,
174
topdown = False):
175
for filename in files:
176
os.remove(os.path.join(root, filename))
177
for dirname in dirs:
178
os.rmdir(os.path.join(root, dirname))
179
# Remove tempdir
180
os.rmdir(self.tempdir)
181
self.tempdir = None
182
183
def password_encode(self, password):
184
# Passphrase can not be empty and can not contain newlines or
185
# NUL bytes. So we prefix it and hex encode it.
186
encoded = b"mandos" + binascii.hexlify(password)
187
if len(encoded) > 2048:
188
# GnuPG can't handle long passwords, so encode differently
189
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
190
.replace(b"\n", b"\\n")
191
.replace(b"\0", b"\\x00"))
192
return encoded
193
194
def encrypt(self, data, password):
195
passphrase = self.password_encode(password)
196
with tempfile.NamedTemporaryFile(
197
dir=self.tempdir) as passfile:
198
passfile.write(passphrase)
199
passfile.flush()
200
proc = subprocess.Popen(['gpg', '--symmetric',
201
'--passphrase-file',
202
passfile.name]
203
+ self.gnupgargs,
204
stdin = subprocess.PIPE,
205
stdout = subprocess.PIPE,
206
stderr = subprocess.PIPE)
207
ciphertext, err = proc.communicate(input = data)
208
if proc.returncode != 0:
209
raise PGPError(err)
210
return ciphertext
211
212
def decrypt(self, data, password):
213
passphrase = self.password_encode(password)
214
with tempfile.NamedTemporaryFile(
215
dir = self.tempdir) as passfile:
216
passfile.write(passphrase)
217
passfile.flush()
218
proc = subprocess.Popen(['gpg', '--decrypt',
219
'--passphrase-file',
220
passfile.name]
221
+ self.gnupgargs,
222
stdin = subprocess.PIPE,
223
stdout = subprocess.PIPE,
224
stderr = subprocess.PIPE)
225
decrypted_plaintext, err = proc.communicate(input = data)
226
if proc.returncode != 0:
227
raise PGPError(err)
228
return decrypted_plaintext
229
101
230
102
231
class AvahiError(Exception):
103
232
def __init__(self, value, *args, **kwargs):
104
233
self.value = value
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
234
return super(AvahiError, self).__init__(value, *args,
235
**kwargs)
236
108
237
109
238
class AvahiServiceError(AvahiError):
110
239
pass
111
240
241
112
242
class AvahiGroupError(AvahiError):
113
243
pass
114
244
119
249
Attributes:
120
250
interface: integer; avahi.IF_UNSPEC or an interface index.
121
251
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
124
See <http://www.dns-sd.org/ServiceTypes.html>
252
name: string; Example: 'Mandos'
253
type: string; Example: '_mandos._tcp'.
254
See <https://www.iana.org/assignments/service-names-port-numbers>
125
255
port: integer; what port to announce
126
256
TXT: list of strings; TXT record for the service
127
257
domain: string; Domain to publish on, default to .local if empty.
133
263
server: D-Bus Server
134
264
bus: dbus.SystemBus()
135
265
"""
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
266
267
def __init__(self,
268
interface = avahi.IF_UNSPEC,
269
name = None,
270
servicetype = None,
271
port = None,
272
TXT = None,
273
domain = "",
274
host = "",
275
max_renames = 32768,
276
protocol = avahi.PROTO_UNSPEC,
277
bus = None):
140
278
self.interface = interface
141
279
self.name = name
142
280
self.type = servicetype
150
288
self.group = None # our entry group
151
289
self.server = None
152
290
self.bus = bus
153
def rename(self):
291
self.entry_group_state_changed_match = None
292
293
def rename(self, remove=True):
154
294
"""Derived from the Avahi example code"""
155
295
if self.rename_count >= self.max_renames:
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
296
logger.critical("No suitable Zeroconf service name found"
297
" after %i retries, exiting.",
158
298
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
161
logger.info(u"Changing Zeroconf service name to %r ...",
299
raise AvahiServiceError("Too many renames")
300
self.name = str(
301
self.server.GetAlternativeServiceName(self.name))
302
self.rename_count += 1
303
logger.info("Changing Zeroconf service name to %r ...",
162
304
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
167
self.remove()
305
if remove:
306
self.remove()
168
307
try:
169
308
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
174
self.rename_count += 1
309
except dbus.exceptions.DBusException as error:
310
if (error.get_dbus_name()
311
== "org.freedesktop.Avahi.CollisionError"):
312
logger.info("Local Zeroconf service name collision.")
313
return self.rename(remove=False)
314
else:
315
logger.critical("D-Bus Exception", exc_info=error)
316
self.cleanup()
317
os._exit(1)
318
175
319
def remove(self):
176
320
"""Derived from the Avahi example code"""
321
if self.entry_group_state_changed_match is not None:
322
self.entry_group_state_changed_match.remove()
323
self.entry_group_state_changed_match = None
177
324
if self.group is not None:
178
325
self.group.Reset()
326
179
327
def add(self):
180
328
"""Derived from the Avahi example code"""
329
self.remove()
181
330
if self.group is None:
182
331
self.group = dbus.Interface(
183
332
self.bus.get_object(avahi.DBUS_NAME,
184
333
self.server.EntryGroupNew()),
185
334
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
335
self.entry_group_state_changed_match = (
336
self.group.connect_to_signal(
337
'StateChanged', self.entry_group_state_changed))
338
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
190
339
self.name, self.type)
191
340
self.group.AddService(
192
341
self.interface,
197
346
dbus.UInt16(self.port),
198
347
avahi.string_array_to_txt_array(self.TXT))
199
348
self.group.Commit()
349
200
350
def entry_group_state_changed(self, state, error):
201
351
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
352
logger.debug("Avahi entry group state change: %i", state)
203
353
204
354
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
355
logger.debug("Zeroconf service established.")
206
356
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
357
logger.info("Zeroconf service name collision.")
208
358
self.rename()
209
359
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
360
logger.critical("Avahi: Error in group state changed %s",
361
str(error))
362
raise AvahiGroupError("State changed: {!s}".format(error))
363
214
364
def cleanup(self):
215
365
"""Derived from the Avahi example code"""
216
366
if self.group is not None:
217
self.group.Free()
367
try:
368
self.group.Free()
369
except (dbus.exceptions.UnknownMethodException,
370
dbus.exceptions.DBusException):
371
pass
218
372
self.group = None
219
def server_state_changed(self, state):
373
self.remove()
374
375
def server_state_changed(self, state, error=None):
220
376
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
377
logger.debug("Avahi server state change: %i", state)
378
bad_states = {
379
avahi.SERVER_INVALID: "Zeroconf server invalid",
380
avahi.SERVER_REGISTERING: None,
381
avahi.SERVER_COLLISION: "Zeroconf server name collision",
382
avahi.SERVER_FAILURE: "Zeroconf server failure",
383
}
384
if state in bad_states:
385
if bad_states[state] is not None:
386
if error is None:
387
logger.error(bad_states[state])
388
else:
389
logger.error(bad_states[state] + ": %r", error)
390
self.cleanup()
225
391
elif state == avahi.SERVER_RUNNING:
226
self.add()
392
try:
393
self.add()
394
except dbus.exceptions.DBusException as error:
395
if (error.get_dbus_name()
396
== "org.freedesktop.Avahi.CollisionError"):
397
logger.info("Local Zeroconf service name"
398
" collision.")
399
return self.rename(remove=False)
400
else:
401
logger.critical("D-Bus Exception", exc_info=error)
402
self.cleanup()
403
os._exit(1)
404
else:
405
if error is None:
406
logger.debug("Unknown state: %r", state)
407
else:
408
logger.debug("Unknown state: %r: %r", state, error)
409
227
410
def activate(self):
228
411
"""Derived from the Avahi example code"""
229
412
if self.server is None:
230
413
self.server = dbus.Interface(
231
414
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
415
avahi.DBUS_PATH_SERVER,
416
follow_name_owner_changes=True),
233
417
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
418
self.server.connect_to_signal("StateChanged",
419
self.server_state_changed)
236
420
self.server_state_changed(self.server.GetState())
237
421
238
422
423
class AvahiServiceToSyslog(AvahiService):
424
def rename(self, *args, **kwargs):
425
"""Add the new name to the syslog messages"""
426
ret = AvahiService.rename(self, *args, **kwargs)
427
syslogger.setFormatter(logging.Formatter(
428
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
429
.format(self.name)))
430
return ret
431
432
# Pretend that we have a GnuTLS module
433
class GnuTLS(object):
434
"""This isn't so much a class as it is a module-like namespace.
435
It is instantiated once, and simulates having a GnuTLS module."""
436
437
_library = ctypes.cdll.LoadLibrary(
438
ctypes.util.find_library("gnutls"))
439
_need_version = "3.3.0"
440
def __init__(self):
441
# Need to use class name "GnuTLS" here, since this method is
442
# called before the assignment to the "gnutls" global variable
443
# happens.
444
if GnuTLS.check_version(self._need_version) is None:
445
raise GnuTLS.Error("Needs GnuTLS {} or later"
446
.format(self._need_version))
447
448
# Unless otherwise indicated, the constants and types below are
449
# all from the gnutls/gnutls.h C header file.
450
451
# Constants
452
E_SUCCESS = 0
453
E_INTERRUPTED = -52
454
E_AGAIN = -28
455
CRT_OPENPGP = 2
456
CLIENT = 2
457
SHUT_RDWR = 0
458
CRD_CERTIFICATE = 1
459
E_NO_CERTIFICATE_FOUND = -49
460
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
461
462
# Types
463
class session_int(ctypes.Structure):
464
_fields_ = []
465
session_t = ctypes.POINTER(session_int)
466
class certificate_credentials_st(ctypes.Structure):
467
_fields_ = []
468
certificate_credentials_t = ctypes.POINTER(
469
certificate_credentials_st)
470
certificate_type_t = ctypes.c_int
471
class datum_t(ctypes.Structure):
472
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
473
('size', ctypes.c_uint)]
474
class openpgp_crt_int(ctypes.Structure):
475
_fields_ = []
476
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
477
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
478
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
479
credentials_type_t = ctypes.c_int #
480
transport_ptr_t = ctypes.c_void_p
481
close_request_t = ctypes.c_int
482
483
# Exceptions
484
class Error(Exception):
485
# We need to use the class name "GnuTLS" here, since this
486
# exception might be raised from within GnuTLS.__init__,
487
# which is called before the assignment to the "gnutls"
488
# global variable has happened.
489
def __init__(self, message = None, code = None, args=()):
490
# Default usage is by a message string, but if a return
491
# code is passed, convert it to a string with
492
# gnutls.strerror()
493
self.code = code
494
if message is None and code is not None:
495
message = GnuTLS.strerror(code)
496
return super(GnuTLS.Error, self).__init__(
497
message, *args)
498
499
class CertificateSecurityError(Error):
500
pass
501
502
# Classes
503
class Credentials(object):
504
def __init__(self):
505
self._c_object = gnutls.certificate_credentials_t()
506
gnutls.certificate_allocate_credentials(
507
ctypes.byref(self._c_object))
508
self.type = gnutls.CRD_CERTIFICATE
509
510
def __del__(self):
511
gnutls.certificate_free_credentials(self._c_object)
512
513
class ClientSession(object):
514
def __init__(self, socket, credentials = None):
515
self._c_object = gnutls.session_t()
516
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
517
gnutls.set_default_priority(self._c_object)
518
gnutls.transport_set_ptr(self._c_object, socket.fileno())
519
gnutls.handshake_set_private_extensions(self._c_object,
520
True)
521
self.socket = socket
522
if credentials is None:
523
credentials = gnutls.Credentials()
524
gnutls.credentials_set(self._c_object, credentials.type,
525
ctypes.cast(credentials._c_object,
526
ctypes.c_void_p))
527
self.credentials = credentials
528
529
def __del__(self):
530
gnutls.deinit(self._c_object)
531
532
def handshake(self):
533
return gnutls.handshake(self._c_object)
534
535
def send(self, data):
536
data = bytes(data)
537
data_len = len(data)
538
while data_len > 0:
539
data_len -= gnutls.record_send(self._c_object,
540
data[-data_len:],
541
data_len)
542
543
def bye(self):
544
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
545
546
# Error handling functions
547
def _error_code(result):
548
"""A function to raise exceptions on errors, suitable
549
for the 'restype' attribute on ctypes functions"""
550
if result >= 0:
551
return result
552
if result == gnutls.E_NO_CERTIFICATE_FOUND:
553
raise gnutls.CertificateSecurityError(code = result)
554
raise gnutls.Error(code = result)
555
556
def _retry_on_error(result, func, arguments):
557
"""A function to retry on some errors, suitable
558
for the 'errcheck' attribute on ctypes functions"""
559
while result < 0:
560
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
561
return _error_code(result)
562
result = func(*arguments)
563
return result
564
565
# Unless otherwise indicated, the function declarations below are
566
# all from the gnutls/gnutls.h C header file.
567
568
# Functions
569
priority_set_direct = _library.gnutls_priority_set_direct
570
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
571
ctypes.POINTER(ctypes.c_char_p)]
572
priority_set_direct.restype = _error_code
573
574
init = _library.gnutls_init
575
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
576
init.restype = _error_code
577
578
set_default_priority = _library.gnutls_set_default_priority
579
set_default_priority.argtypes = [session_t]
580
set_default_priority.restype = _error_code
581
582
record_send = _library.gnutls_record_send
583
record_send.argtypes = [session_t, ctypes.c_void_p,
584
ctypes.c_size_t]
585
record_send.restype = ctypes.c_ssize_t
586
record_send.errcheck = _retry_on_error
587
588
certificate_allocate_credentials = (
589
_library.gnutls_certificate_allocate_credentials)
590
certificate_allocate_credentials.argtypes = [
591
ctypes.POINTER(certificate_credentials_t)]
592
certificate_allocate_credentials.restype = _error_code
593
594
certificate_free_credentials = (
595
_library.gnutls_certificate_free_credentials)
596
certificate_free_credentials.argtypes = [certificate_credentials_t]
597
certificate_free_credentials.restype = None
598
599
handshake_set_private_extensions = (
600
_library.gnutls_handshake_set_private_extensions)
601
handshake_set_private_extensions.argtypes = [session_t,
602
ctypes.c_int]
603
handshake_set_private_extensions.restype = None
604
605
credentials_set = _library.gnutls_credentials_set
606
credentials_set.argtypes = [session_t, credentials_type_t,
607
ctypes.c_void_p]
608
credentials_set.restype = _error_code
609
610
strerror = _library.gnutls_strerror
611
strerror.argtypes = [ctypes.c_int]
612
strerror.restype = ctypes.c_char_p
613
614
certificate_type_get = _library.gnutls_certificate_type_get
615
certificate_type_get.argtypes = [session_t]
616
certificate_type_get.restype = _error_code
617
618
certificate_get_peers = _library.gnutls_certificate_get_peers
619
certificate_get_peers.argtypes = [session_t,
620
ctypes.POINTER(ctypes.c_uint)]
621
certificate_get_peers.restype = ctypes.POINTER(datum_t)
622
623
global_set_log_level = _library.gnutls_global_set_log_level
624
global_set_log_level.argtypes = [ctypes.c_int]
625
global_set_log_level.restype = None
626
627
global_set_log_function = _library.gnutls_global_set_log_function
628
global_set_log_function.argtypes = [log_func]
629
global_set_log_function.restype = None
630
631
deinit = _library.gnutls_deinit
632
deinit.argtypes = [session_t]
633
deinit.restype = None
634
635
handshake = _library.gnutls_handshake
636
handshake.argtypes = [session_t]
637
handshake.restype = _error_code
638
handshake.errcheck = _retry_on_error
639
640
transport_set_ptr = _library.gnutls_transport_set_ptr
641
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
642
transport_set_ptr.restype = None
643
644
bye = _library.gnutls_bye
645
bye.argtypes = [session_t, close_request_t]
646
bye.restype = _error_code
647
bye.errcheck = _retry_on_error
648
649
check_version = _library.gnutls_check_version
650
check_version.argtypes = [ctypes.c_char_p]
651
check_version.restype = ctypes.c_char_p
652
653
# All the function declarations below are from gnutls/openpgp.h
654
655
openpgp_crt_init = _library.gnutls_openpgp_crt_init
656
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
657
openpgp_crt_init.restype = _error_code
658
659
openpgp_crt_import = _library.gnutls_openpgp_crt_import
660
openpgp_crt_import.argtypes = [openpgp_crt_t,
661
ctypes.POINTER(datum_t),
662
openpgp_crt_fmt_t]
663
openpgp_crt_import.restype = _error_code
664
665
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
666
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
667
ctypes.POINTER(ctypes.c_uint)]
668
openpgp_crt_verify_self.restype = _error_code
669
670
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
671
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
672
openpgp_crt_deinit.restype = None
673
674
openpgp_crt_get_fingerprint = (
675
_library.gnutls_openpgp_crt_get_fingerprint)
676
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
677
ctypes.c_void_p,
678
ctypes.POINTER(
679
ctypes.c_size_t)]
680
openpgp_crt_get_fingerprint.restype = _error_code
681
682
# Remove non-public functions
683
del _error_code, _retry_on_error
684
# Create the global "gnutls" object, simulating a module
685
gnutls = GnuTLS()
686
687
def call_pipe(connection, # : multiprocessing.Connection
688
func, *args, **kwargs):
689
"""This function is meant to be called by multiprocessing.Process
690
691
This function runs func(*args, **kwargs), and writes the resulting
692
return value on the provided multiprocessing.Connection.
693
"""
694
connection.send(func(*args, **kwargs))
695
connection.close()
696
239
697
class Client(object):
240
698
"""A representation of a client host served by this server.
241
699
242
700
Attributes:
243
_approved: bool(); 'None' if not yet approved/disapproved
701
approved: bool(); 'None' if not yet approved/disapproved
244
702
approval_delay: datetime.timedelta(); Time to wait for approval
245
703
approval_duration: datetime.timedelta(); Duration of one approval
246
704
checker: subprocess.Popen(); a running checker process used
253
711
instance %(name)s can be used in the command.
254
712
checker_initiator_tag: a gobject event source tag, or None
255
713
created: datetime.datetime(); (UTC) object creation
714
client_structure: Object describing what attributes a client has
715
and is used for storing the client at exit
256
716
current_checker_command: string; current running checker_command
257
disable_hook: If set, called by disable() as disable_hook(self)
258
717
disable_initiator_tag: a gobject event source tag, or None
259
718
enabled: bool()
260
719
fingerprint: string (40 or 32 hexadecimal digits); used to
263
722
interval: datetime.timedelta(); How often to start a new checker
264
723
last_approval_request: datetime.datetime(); (UTC) or None
265
724
last_checked_ok: datetime.datetime(); (UTC) or None
266
last_enabled: datetime.datetime(); (UTC)
725
last_checker_status: integer between 0 and 255 reflecting exit
726
status of last checker. -1 reflects crashed
727
checker, -2 means no checker completed yet.
728
last_checker_signal: The signal which killed the last checker, if
729
last_checker_status is -1
730
last_enabled: datetime.datetime(); (UTC) or None
267
731
name: string; from the config file, used in log messages and
268
732
D-Bus identifiers
269
733
secret: bytestring; sent verbatim (over TLS) to client
270
734
timeout: datetime.timedelta(); How long from last_checked_ok
271
735
until this client is disabled
736
extended_timeout: extra long timeout when secret has been sent
272
737
runtime_expansions: Allowed attributes for runtime expansion.
738
expires: datetime.datetime(); time (UTC) when a client will be
739
disabled, or None
740
server_settings: The server_settings dict from main()
273
741
"""
274
742
275
runtime_expansions = (u"approval_delay", u"approval_duration",
276
u"created", u"enabled", u"fingerprint",
277
u"host", u"interval", u"last_checked_ok",
278
u"last_enabled", u"name", u"timeout")
743
runtime_expansions = ("approval_delay", "approval_duration",
744
"created", "enabled", "expires",
745
"fingerprint", "host", "interval",
746
"last_approval_request", "last_checked_ok",
747
"last_enabled", "name", "timeout")
748
client_defaults = {
749
"timeout": "PT5M",
750
"extended_timeout": "PT15M",
751
"interval": "PT2M",
752
"checker": "fping -q -- %%(host)s",
753
"host": "",
754
"approval_delay": "PT0S",
755
"approval_duration": "PT1S",
756
"approved_by_default": "True",
757
"enabled": "True",
758
}
279
759
280
760
@staticmethod
281
def _timedelta_to_milliseconds(td):
282
"Convert a datetime.timedelta() to milliseconds"
283
return ((td.days * 24 * 60 * 60 * 1000)
284
+ (td.seconds * 1000)
285
+ (td.microseconds // 1000))
286
287
def timeout_milliseconds(self):
288
"Return the 'timeout' attribute in milliseconds"
289
return self._timedelta_to_milliseconds(self.timeout)
290
291
def interval_milliseconds(self):
292
"Return the 'interval' attribute in milliseconds"
293
return self._timedelta_to_milliseconds(self.interval)
294
295
def approval_delay_milliseconds(self):
296
return self._timedelta_to_milliseconds(self.approval_delay)
297
298
def __init__(self, name = None, disable_hook=None, config=None):
299
"""Note: the 'checker' key in 'config' sets the
300
'checker_command' attribute and *not* the 'checker'
301
attribute."""
761
def config_parser(config):
762
"""Construct a new dict of client settings of this form:
763
{ client_name: {setting_name: value, ...}, ...}
764
with exceptions for any special settings as defined above.
765
NOTE: Must be a pure function. Must return the same result
766
value given the same arguments.
767
"""
768
settings = {}
769
for client_name in config.sections():
770
section = dict(config.items(client_name))
771
client = settings[client_name] = {}
772
773
client["host"] = section["host"]
774
# Reformat values from string types to Python types
775
client["approved_by_default"] = config.getboolean(
776
client_name, "approved_by_default")
777
client["enabled"] = config.getboolean(client_name,
778
"enabled")
779
780
# Uppercase and remove spaces from fingerprint for later
781
# comparison purposes with return value from the
782
# fingerprint() function
783
client["fingerprint"] = (section["fingerprint"].upper()
784
.replace(" ", ""))
785
if "secret" in section:
786
client["secret"] = section["secret"].decode("base64")
787
elif "secfile" in section:
788
with open(os.path.expanduser(os.path.expandvars
789
(section["secfile"])),
790
"rb") as secfile:
791
client["secret"] = secfile.read()
792
else:
793
raise TypeError("No secret or secfile for section {}"
794
.format(section))
795
client["timeout"] = string_to_delta(section["timeout"])
796
client["extended_timeout"] = string_to_delta(
797
section["extended_timeout"])
798
client["interval"] = string_to_delta(section["interval"])
799
client["approval_delay"] = string_to_delta(
800
section["approval_delay"])
801
client["approval_duration"] = string_to_delta(
802
section["approval_duration"])
803
client["checker_command"] = section["checker"]
804
client["last_approval_request"] = None
805
client["last_checked_ok"] = None
806
client["last_checker_status"] = -2
807
808
return settings
809
810
def __init__(self, settings, name = None, server_settings=None):
302
811
self.name = name
303
if config is None:
304
config = {}
305
logger.debug(u"Creating client %r", self.name)
306
# Uppercase and remove spaces from fingerprint for later
307
# comparison purposes with return value from the fingerprint()
308
# function
309
self.fingerprint = (config[u"fingerprint"].upper()
310
.replace(u" ", u""))
311
logger.debug(u" Fingerprint: %s", self.fingerprint)
312
if u"secret" in config:
313
self.secret = config[u"secret"].decode(u"base64")
314
elif u"secfile" in config:
315
with open(os.path.expanduser(os.path.expandvars
316
(config[u"secfile"])),
317
"rb") as secfile:
318
self.secret = secfile.read()
812
if server_settings is None:
813
server_settings = {}
814
self.server_settings = server_settings
815
# adding all client settings
816
for setting, value in settings.items():
817
setattr(self, setting, value)
818
819
if self.enabled:
820
if not hasattr(self, "last_enabled"):
821
self.last_enabled = datetime.datetime.utcnow()
822
if not hasattr(self, "expires"):
823
self.expires = (datetime.datetime.utcnow()
824
+ self.timeout)
319
825
else:
320
raise TypeError(u"No secret or secfile for client %s"
321
% self.name)
322
self.host = config.get(u"host", u"")
323
self.created = datetime.datetime.utcnow()
324
self.enabled = False
325
self.last_approval_request = None
326
self.last_enabled = None
327
self.last_checked_ok = None
328
self.timeout = string_to_delta(config[u"timeout"])
329
self.interval = string_to_delta(config[u"interval"])
330
self.disable_hook = disable_hook
826
self.last_enabled = None
827
self.expires = None
828
829
logger.debug("Creating client %r", self.name)
830
logger.debug(" Fingerprint: %s", self.fingerprint)
831
self.created = settings.get("created",
832
datetime.datetime.utcnow())
833
834
# attributes specific for this server instance
331
835
self.checker = None
332
836
self.checker_initiator_tag = None
333
837
self.disable_initiator_tag = None
334
838
self.checker_callback_tag = None
335
self.checker_command = config[u"checker"]
336
839
self.current_checker_command = None
337
self.last_connect = None
338
self._approved = None
339
self.approved_by_default = config.get(u"approved_by_default",
340
True)
840
self.approved = None
341
841
self.approvals_pending = 0
342
self.approval_delay = string_to_delta(
343
config[u"approval_delay"])
344
self.approval_duration = string_to_delta(
345
config[u"approval_duration"])
346
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
842
self.changedstate = multiprocessing_manager.Condition(
843
multiprocessing_manager.Lock())
844
self.client_structure = [attr
845
for attr in self.__dict__.iterkeys()
846
if not attr.startswith("_")]
847
self.client_structure.append("client_structure")
848
849
for name, t in inspect.getmembers(
850
type(self), lambda obj: isinstance(obj, property)):
851
if not name.startswith("_"):
852
self.client_structure.append(name)
347
853
854
# Send notice to process children that client state has changed
348
855
def send_changedstate(self):
349
self.changedstate.acquire()
350
self.changedstate.notify_all()
351
self.changedstate.release()
352
856
with self.changedstate:
857
self.changedstate.notify_all()
858
353
859
def enable(self):
354
860
"""Start this client's checker and timeout hooks"""
355
if getattr(self, u"enabled", False):
861
if getattr(self, "enabled", False):
356
862
# Already enabled
357
863
return
358
self.send_changedstate()
864
self.expires = datetime.datetime.utcnow() + self.timeout
865
self.enabled = True
359
866
self.last_enabled = datetime.datetime.utcnow()
360
# Schedule a new checker to be started an 'interval' from now,
361
# and every interval from then on.
362
self.checker_initiator_tag = (gobject.timeout_add
363
(self.interval_milliseconds(),
364
self.start_checker))
365
# Schedule a disable() when 'timeout' has passed
366
self.disable_initiator_tag = (gobject.timeout_add
367
(self.timeout_milliseconds(),
368
self.disable))
369
self.enabled = True
370
# Also start a new checker *right now*.
371
self.start_checker()
867
self.init_checker()
868
self.send_changedstate()
372
869
373
870
def disable(self, quiet=True):
374
871
"""Disable this client."""
375
872
if not getattr(self, "enabled", False):
376
873
return False
377
874
if not quiet:
875
logger.info("Disabling client %s", self.name)
876
if getattr(self, "disable_initiator_tag", None) is not None:
877
gobject.source_remove(self.disable_initiator_tag)
878
self.disable_initiator_tag = None
879
self.expires = None
880
if getattr(self, "checker_initiator_tag", None) is not None:
881
gobject.source_remove(self.checker_initiator_tag)
882
self.checker_initiator_tag = None
883
self.stop_checker()
884
self.enabled = False
885
if not quiet:
378
886
self.send_changedstate()
379
if not quiet:
380
logger.info(u"Disabling client %s", self.name)
381
if getattr(self, u"disable_initiator_tag", False):
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = None
384
if getattr(self, u"checker_initiator_tag", False):
385
gobject.source_remove(self.checker_initiator_tag)
386
self.checker_initiator_tag = None
387
self.stop_checker()
388
if self.disable_hook:
389
self.disable_hook(self)
390
self.enabled = False
391
887
# Do not run this again if called by a gobject.timeout_add
392
888
return False
393
889
394
890
def __del__(self):
395
self.disable_hook = None
396
891
self.disable()
397
892
398
def checker_callback(self, pid, condition, command):
893
def init_checker(self):
894
# Schedule a new checker to be started an 'interval' from now,
895
# and every interval from then on.
896
if self.checker_initiator_tag is not None:
897
gobject.source_remove(self.checker_initiator_tag)
898
self.checker_initiator_tag = gobject.timeout_add(
899
int(self.interval.total_seconds() * 1000),
900
self.start_checker)
901
# Schedule a disable() when 'timeout' has passed
902
if self.disable_initiator_tag is not None:
903
gobject.source_remove(self.disable_initiator_tag)
904
self.disable_initiator_tag = gobject.timeout_add(
905
int(self.timeout.total_seconds() * 1000), self.disable)
906
# Also start a new checker *right now*.
907
self.start_checker()
908
909
def checker_callback(self, source, condition, connection,
910
command):
399
911
"""The checker has completed, so take appropriate actions."""
400
912
self.checker_callback_tag = None
401
913
self.checker = None
402
if os.WIFEXITED(condition):
403
exitstatus = os.WEXITSTATUS(condition)
404
if exitstatus == 0:
405
logger.info(u"Checker for %(name)s succeeded",
914
# Read return code from connection (see call_pipe)
915
returncode = connection.recv()
916
connection.close()
917
918
if returncode >= 0:
919
self.last_checker_status = returncode
920
self.last_checker_signal = None
921
if self.last_checker_status == 0:
922
logger.info("Checker for %(name)s succeeded",
406
923
vars(self))
407
924
self.checked_ok()
408
925
else:
409
logger.info(u"Checker for %(name)s failed",
410
vars(self))
926
logger.info("Checker for %(name)s failed", vars(self))
411
927
else:
412
logger.warning(u"Checker for %(name)s crashed?",
928
self.last_checker_status = -1
929
self.last_checker_signal = -returncode
930
logger.warning("Checker for %(name)s crashed?",
413
931
vars(self))
932
return False
414
933
415
934
def checked_ok(self):
416
"""Bump up the timeout for this client.
417
418
This should only be called when the client has been seen,
419
alive and well.
420
"""
935
"""Assert that the client has been seen, alive and well."""
421
936
self.last_checked_ok = datetime.datetime.utcnow()
422
gobject.source_remove(self.disable_initiator_tag)
423
self.disable_initiator_tag = (gobject.timeout_add
424
(self.timeout_milliseconds(),
425
self.disable))
937
self.last_checker_status = 0
938
self.last_checker_signal = None
939
self.bump_timeout()
940
941
def bump_timeout(self, timeout=None):
942
"""Bump up the timeout for this client."""
943
if timeout is None:
944
timeout = self.timeout
945
if self.disable_initiator_tag is not None:
946
gobject.source_remove(self.disable_initiator_tag)
947
self.disable_initiator_tag = None
948
if getattr(self, "enabled", False):
949
self.disable_initiator_tag = gobject.timeout_add(
950
int(timeout.total_seconds() * 1000), self.disable)
951
self.expires = datetime.datetime.utcnow() + timeout
426
952
427
953
def need_approval(self):
428
954
self.last_approval_request = datetime.datetime.utcnow()
433
959
If a checker already exists, leave it running and do
434
960
nothing."""
435
961
# The reason for not killing a running checker is that if we
436
# did that, then if a checker (for some reason) started
437
# running slowly and taking more than 'interval' time, the
438
# client would inevitably timeout, since no checker would get
439
# a chance to run to completion. If we instead leave running
962
# did that, and if a checker (for some reason) started running
963
# slowly and taking more than 'interval' time, then the client
964
# would inevitably timeout, since no checker would get a
965
# chance to run to completion. If we instead leave running
440
966
# checkers alone, the checker would have to take more time
441
967
# than 'timeout' for the client to be disabled, which is as it
442
968
# should be.
443
969
444
# If a checker exists, make sure it is not a zombie
445
try:
446
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
447
except (AttributeError, OSError), error:
448
if (isinstance(error, OSError)
449
and error.errno != errno.ECHILD):
450
raise error
451
else:
452
if pid:
453
logger.warning(u"Checker was a zombie")
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback(pid, status,
456
self.current_checker_command)
970
if self.checker is not None and not self.checker.is_alive():
971
logger.warning("Checker was not alive; joining")
972
self.checker.join()
973
self.checker = None
457
974
# Start a new checker if needed
458
975
if self.checker is None:
976
# Escape attributes for the shell
977
escaped_attrs = {
978
attr: re.escape(str(getattr(self, attr)))
979
for attr in self.runtime_expansions }
459
980
try:
460
# In case checker_command has exactly one % operator
461
command = self.checker_command % self.host
462
except TypeError:
463
# Escape attributes for the shell
464
escaped_attrs = dict(
465
(attr,
466
re.escape(unicode(str(getattr(self, attr, u"")),
467
errors=
468
u'replace')))
469
for attr in
470
self.runtime_expansions)
471
472
try:
473
command = self.checker_command % escaped_attrs
474
except TypeError, error:
475
logger.error(u'Could not format string "%s":'
476
u' %s', self.checker_command, error)
477
return True # Try again later
981
command = self.checker_command % escaped_attrs
982
except TypeError as error:
983
logger.error('Could not format string "%s"',
984
self.checker_command,
985
exc_info=error)
986
return True # Try again later
478
987
self.current_checker_command = command
479
try:
480
logger.info(u"Starting checker %r for %s",
481
command, self.name)
482
# We don't need to redirect stdout and stderr, since
483
# in normal mode, that is already done by daemon(),
484
# and in debug mode we don't want to. (Stdin is
485
# always replaced by /dev/null.)
486
self.checker = subprocess.Popen(command,
487
close_fds=True,
488
shell=True, cwd=u"/")
489
self.checker_callback_tag = (gobject.child_watch_add
490
(self.checker.pid,
491
self.checker_callback,
492
data=command))
493
# The checker may have completed before the gobject
494
# watch was added. Check for this.
495
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
496
if pid:
497
gobject.source_remove(self.checker_callback_tag)
498
self.checker_callback(pid, status, command)
499
except OSError, error:
500
logger.error(u"Failed to start subprocess: %s",
501
error)
988
logger.info("Starting checker %r for %s", command,
989
self.name)
990
# We don't need to redirect stdout and stderr, since
991
# in normal mode, that is already done by daemon(),
992
# and in debug mode we don't want to. (Stdin is
993
# always replaced by /dev/null.)
994
# The exception is when not debugging but nevertheless
995
# running in the foreground; use the previously
996
# created wnull.
997
popen_args = { "close_fds": True,
998
"shell": True,
999
"cwd": "/" }
1000
if (not self.server_settings["debug"]
1001
and self.server_settings["foreground"]):
1002
popen_args.update({"stdout": wnull,
1003
"stderr": wnull })
1004
pipe = multiprocessing.Pipe(duplex = False)
1005
self.checker = multiprocessing.Process(
1006
target = call_pipe,
1007
args = (pipe[1], subprocess.call, command),
1008
kwargs = popen_args)
1009
self.checker.start()
1010
self.checker_callback_tag = gobject.io_add_watch(
1011
pipe[0].fileno(), gobject.IO_IN,
1012
self.checker_callback, pipe[0], command)
502
1013
# Re-run this periodically if run by gobject.timeout_add
503
1014
return True
504
1015
507
1018
if self.checker_callback_tag:
508
1019
gobject.source_remove(self.checker_callback_tag)
509
1020
self.checker_callback_tag = None
510
if getattr(self, u"checker", None) is None:
1021
if getattr(self, "checker", None) is None:
511
1022
return
512
logger.debug(u"Stopping checker for %(name)s", vars(self))
513
try:
514
os.kill(self.checker.pid, signal.SIGTERM)
515
#time.sleep(0.5)
516
#if self.checker.poll() is None:
517
# os.kill(self.checker.pid, signal.SIGKILL)
518
except OSError, error:
519
if error.errno != errno.ESRCH: # No such process
520
raise
1023
logger.debug("Stopping checker for %(name)s", vars(self))
1024
self.checker.terminate()
521
1025
self.checker = None
522
1026
523
def dbus_service_property(dbus_interface, signature=u"v",
524
access=u"readwrite", byte_arrays=False):
1027
1028
def dbus_service_property(dbus_interface,
1029
signature="v",
1030
access="readwrite",
1031
byte_arrays=False):
525
1032
"""Decorators for marking methods of a DBusObjectWithProperties to
526
1033
become properties on the D-Bus.
527
1034
534
1041
"""
535
1042
# Encoding deeply encoded byte arrays is not supported yet by the
536
1043
# "Set" method, so we fail early here:
537
if byte_arrays and signature != u"ay":
538
raise ValueError(u"Byte arrays not supported for non-'ay'"
539
u" signature %r" % signature)
1044
if byte_arrays and signature != "ay":
1045
raise ValueError("Byte arrays not supported for non-'ay'"
1046
" signature {!r}".format(signature))
1047
540
1048
def decorator(func):
541
1049
func._dbus_is_property = True
542
1050
func._dbus_interface = dbus_interface
543
1051
func._dbus_signature = signature
544
1052
func._dbus_access = access
545
1053
func._dbus_name = func.__name__
546
if func._dbus_name.endswith(u"_dbus_property"):
1054
if func._dbus_name.endswith("_dbus_property"):
547
1055
func._dbus_name = func._dbus_name[:-14]
548
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
549
return func
1056
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1057
return func
1058
1059
return decorator
1060
1061
1062
def dbus_interface_annotations(dbus_interface):
1063
"""Decorator for marking functions returning interface annotations
1064
1065
Usage:
1066
1067
@dbus_interface_annotations("org.example.Interface")
1068
def _foo(self): # Function name does not matter
1069
return {"org.freedesktop.DBus.Deprecated": "true",
1070
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1071
"false"}
1072
"""
1073
1074
def decorator(func):
1075
func._dbus_is_interface = True
1076
func._dbus_interface = dbus_interface
1077
func._dbus_name = dbus_interface
1078
return func
1079
1080
return decorator
1081
1082
1083
def dbus_annotations(annotations):
1084
"""Decorator to annotate D-Bus methods, signals or properties
1085
Usage:
1086
1087
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1088
"org.freedesktop.DBus.Property."
1089
"EmitsChangedSignal": "false"})
1090
@dbus_service_property("org.example.Interface", signature="b",
1091
access="r")
1092
def Property_dbus_property(self):
1093
return dbus.Boolean(False)
1094
1095
See also the DBusObjectWithAnnotations class.
1096
"""
1097
1098
def decorator(func):
1099
func._dbus_annotations = annotations
1100
return func
1101
550
1102
return decorator
551
1103
552
1104
553
1105
class DBusPropertyException(dbus.exceptions.DBusException):
554
1106
"""A base class for D-Bus property-related exceptions
555
1107
"""
556
def __unicode__(self):
557
return unicode(str(self))
1108
pass
558
1109
559
1110
560
1111
class DBusPropertyAccessException(DBusPropertyException):
569
1120
pass
570
1121
571
1122
572
class DBusObjectWithProperties(dbus.service.Object):
1123
class DBusObjectWithAnnotations(dbus.service.Object):
1124
"""A D-Bus object with annotations.
1125
1126
Classes inheriting from this can use the dbus_annotations
1127
decorator to add annotations to methods or signals.
1128
"""
1129
1130
@staticmethod
1131
def _is_dbus_thing(thing):
1132
"""Returns a function testing if an attribute is a D-Bus thing
1133
1134
If called like _is_dbus_thing("method") it returns a function
1135
suitable for use as predicate to inspect.getmembers().
1136
"""
1137
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1138
False)
1139
1140
def _get_all_dbus_things(self, thing):
1141
"""Returns a generator of (name, attribute) pairs
1142
"""
1143
return ((getattr(athing.__get__(self), "_dbus_name", name),
1144
athing.__get__(self))
1145
for cls in self.__class__.__mro__
1146
for name, athing in
1147
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1148
1149
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1150
out_signature = "s",
1151
path_keyword = 'object_path',
1152
connection_keyword = 'connection')
1153
def Introspect(self, object_path, connection):
1154
"""Overloading of standard D-Bus method.
1155
1156
Inserts annotation tags on methods and signals.
1157
"""
1158
xmlstring = dbus.service.Object.Introspect(self, object_path,
1159
connection)
1160
try:
1161
document = xml.dom.minidom.parseString(xmlstring)
1162
1163
for if_tag in document.getElementsByTagName("interface"):
1164
# Add annotation tags
1165
for typ in ("method", "signal"):
1166
for tag in if_tag.getElementsByTagName(typ):
1167
annots = dict()
1168
for name, prop in (self.
1169
_get_all_dbus_things(typ)):
1170
if (name == tag.getAttribute("name")
1171
and prop._dbus_interface
1172
== if_tag.getAttribute("name")):
1173
annots.update(getattr(
1174
prop, "_dbus_annotations", {}))
1175
for name, value in annots.items():
1176
ann_tag = document.createElement(
1177
"annotation")
1178
ann_tag.setAttribute("name", name)
1179
ann_tag.setAttribute("value", value)
1180
tag.appendChild(ann_tag)
1181
# Add interface annotation tags
1182
for annotation, value in dict(
1183
itertools.chain.from_iterable(
1184
annotations().items()
1185
for name, annotations
1186
in self._get_all_dbus_things("interface")
1187
if name == if_tag.getAttribute("name")
1188
)).items():
1189
ann_tag = document.createElement("annotation")
1190
ann_tag.setAttribute("name", annotation)
1191
ann_tag.setAttribute("value", value)
1192
if_tag.appendChild(ann_tag)
1193
# Fix argument name for the Introspect method itself
1194
if (if_tag.getAttribute("name")
1195
== dbus.INTROSPECTABLE_IFACE):
1196
for cn in if_tag.getElementsByTagName("method"):
1197
if cn.getAttribute("name") == "Introspect":
1198
for arg in cn.getElementsByTagName("arg"):
1199
if (arg.getAttribute("direction")
1200
== "out"):
1201
arg.setAttribute("name",
1202
"xml_data")
1203
xmlstring = document.toxml("utf-8")
1204
document.unlink()
1205
except (AttributeError, xml.dom.DOMException,
1206
xml.parsers.expat.ExpatError) as error:
1207
logger.error("Failed to override Introspection method",
1208
exc_info=error)
1209
return xmlstring
1210
1211
1212
class DBusObjectWithProperties(DBusObjectWithAnnotations):
573
1213
"""A D-Bus object with properties.
574
1214
575
1215
Classes inheriting from this can use the dbus_service_property
576
1216
decorator to expose methods as D-Bus properties. It exposes the
577
1217
standard Get(), Set(), and GetAll() methods on the D-Bus.
578
1218
"""
579
1219
580
@staticmethod
581
def _is_dbus_property(obj):
582
return getattr(obj, u"_dbus_is_property", False)
583
584
def _get_all_dbus_properties(self):
585
"""Returns a generator of (name, attribute) pairs
586
"""
587
return ((prop._dbus_name, prop)
588
for name, prop in
589
inspect.getmembers(self, self._is_dbus_property))
590
591
1220
def _get_dbus_property(self, interface_name, property_name):
592
1221
"""Returns a bound method if one exists which is a D-Bus
593
1222
property with the specified name and interface.
594
1223
"""
595
for name in (property_name,
596
property_name + u"_dbus_property"):
597
prop = getattr(self, name, None)
598
if (prop is None
599
or not self._is_dbus_property(prop)
600
or prop._dbus_name != property_name
601
or (interface_name and prop._dbus_interface
602
and interface_name != prop._dbus_interface)):
603
continue
604
return prop
1224
for cls in self.__class__.__mro__:
1225
for name, value in inspect.getmembers(
1226
cls, self._is_dbus_thing("property")):
1227
if (value._dbus_name == property_name
1228
and value._dbus_interface == interface_name):
1229
return value.__get__(self)
1230
605
1231
# No such property
606
raise DBusPropertyNotFound(self.dbus_object_path + u":"
607
+ interface_name + u"."
608
+ property_name)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
611
out_signature=u"v")
1232
raise DBusPropertyNotFound("{}:{}.{}".format(
1233
self.dbus_object_path, interface_name, property_name))
1234
1235
@classmethod
1236
def _get_all_interface_names(cls):
1237
"""Get a sequence of all interfaces supported by an object"""
1238
return (name for name in set(getattr(getattr(x, attr),
1239
"_dbus_interface", None)
1240
for x in (inspect.getmro(cls))
1241
for attr in dir(x))
1242
if name is not None)
1243
1244
@dbus.service.method(dbus.PROPERTIES_IFACE,
1245
in_signature="ss",
1246
out_signature="v")
612
1247
def Get(self, interface_name, property_name):
613
1248
"""Standard D-Bus property Get() method, see D-Bus standard.
614
1249
"""
615
1250
prop = self._get_dbus_property(interface_name, property_name)
616
if prop._dbus_access == u"write":
1251
if prop._dbus_access == "write":
617
1252
raise DBusPropertyAccessException(property_name)
618
1253
value = prop()
619
if not hasattr(value, u"variant_level"):
1254
if not hasattr(value, "variant_level"):
620
1255
return value
621
1256
return type(value)(value, variant_level=value.variant_level+1)
622
1257
623
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1258
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
624
1259
def Set(self, interface_name, property_name, value):
625
1260
"""Standard D-Bus property Set() method, see D-Bus standard.
626
1261
"""
627
1262
prop = self._get_dbus_property(interface_name, property_name)
628
if prop._dbus_access == u"read":
1263
if prop._dbus_access == "read":
629
1264
raise DBusPropertyAccessException(property_name)
630
if prop._dbus_get_args_options[u"byte_arrays"]:
1265
if prop._dbus_get_args_options["byte_arrays"]:
631
1266
# The byte_arrays option is not supported yet on
632
1267
# signatures other than "ay".
633
if prop._dbus_signature != u"ay":
634
raise ValueError
635
value = dbus.ByteArray(''.join(unichr(byte)
636
for byte in value))
1268
if prop._dbus_signature != "ay":
1269
raise ValueError("Byte arrays not supported for non-"
1270
"'ay' signature {!r}"
1271
.format(prop._dbus_signature))
1272
value = dbus.ByteArray(b''.join(chr(byte)
1273
for byte in value))
637
1274
prop(value)
638
1275
639
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
640
out_signature=u"a{sv}")
1276
@dbus.service.method(dbus.PROPERTIES_IFACE,
1277
in_signature="s",
1278
out_signature="a{sv}")
641
1279
def GetAll(self, interface_name):
642
1280
"""Standard D-Bus property GetAll() method, see D-Bus
643
1281
standard.
644
1282
645
1283
Note: Will not include properties with access="write".
646
1284
"""
647
all = {}
648
for name, prop in self._get_all_dbus_properties():
1285
properties = {}
1286
for name, prop in self._get_all_dbus_things("property"):
649
1287
if (interface_name
650
1288
and interface_name != prop._dbus_interface):
651
1289
# Interface non-empty but did not match
652
1290
continue
653
1291
# Ignore write-only properties
654
if prop._dbus_access == u"write":
1292
if prop._dbus_access == "write":
655
1293
continue
656
1294
value = prop()
657
if not hasattr(value, u"variant_level"):
658
all[name] = value
1295
if not hasattr(value, "variant_level"):
1296
properties[name] = value
659
1297
continue
660
all[name] = type(value)(value, variant_level=
661
value.variant_level+1)
662
return dbus.Dictionary(all, signature=u"sv")
1298
properties[name] = type(value)(
1299
value, variant_level = value.variant_level + 1)
1300
return dbus.Dictionary(properties, signature="sv")
1301
1302
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1303
def PropertiesChanged(self, interface_name, changed_properties,
1304
invalidated_properties):
1305
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1306
standard.
1307
"""
1308
pass
663
1309
664
1310
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
665
out_signature=u"s",
1311
out_signature="s",
666
1312
path_keyword='object_path',
667
1313
connection_keyword='connection')
668
1314
def Introspect(self, object_path, connection):
669
"""Standard D-Bus method, overloaded to insert property tags.
1315
"""Overloading of standard D-Bus method.
1316
1317
Inserts property tags and interface annotation tags.
670
1318
"""
671
xmlstring = dbus.service.Object.Introspect(self, object_path,
672
connection)
1319
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1320
object_path,
1321
connection)
673
1322
try:
674
1323
document = xml.dom.minidom.parseString(xmlstring)
1324
675
1325
def make_tag(document, name, prop):
676
e = document.createElement(u"property")
677
e.setAttribute(u"name", name)
678
e.setAttribute(u"type", prop._dbus_signature)
679
e.setAttribute(u"access", prop._dbus_access)
1326
e = document.createElement("property")
1327
e.setAttribute("name", name)
1328
e.setAttribute("type", prop._dbus_signature)
1329
e.setAttribute("access", prop._dbus_access)
680
1330
return e
681
for if_tag in document.getElementsByTagName(u"interface"):
1331
1332
for if_tag in document.getElementsByTagName("interface"):
1333
# Add property tags
682
1334
for tag in (make_tag(document, name, prop)
683
1335
for name, prop
684
in self._get_all_dbus_properties()
1336
in self._get_all_dbus_things("property")
685
1337
if prop._dbus_interface
686
== if_tag.getAttribute(u"name")):
1338
== if_tag.getAttribute("name")):
687
1339
if_tag.appendChild(tag)
1340
# Add annotation tags for properties
1341
for tag in if_tag.getElementsByTagName("property"):
1342
annots = dict()
1343
for name, prop in self._get_all_dbus_things(
1344
"property"):
1345
if (name == tag.getAttribute("name")
1346
and prop._dbus_interface
1347
== if_tag.getAttribute("name")):
1348
annots.update(getattr(
1349
prop, "_dbus_annotations", {}))
1350
for name, value in annots.items():
1351
ann_tag = document.createElement(
1352
"annotation")
1353
ann_tag.setAttribute("name", name)
1354
ann_tag.setAttribute("value", value)
1355
tag.appendChild(ann_tag)
688
1356
# Add the names to the return values for the
689
1357
# "org.freedesktop.DBus.Properties" methods
690
if (if_tag.getAttribute(u"name")
691
== u"org.freedesktop.DBus.Properties"):
692
for cn in if_tag.getElementsByTagName(u"method"):
693
if cn.getAttribute(u"name") == u"Get":
694
for arg in cn.getElementsByTagName(u"arg"):
695
if (arg.getAttribute(u"direction")
696
== u"out"):
697
arg.setAttribute(u"name", u"value")
698
elif cn.getAttribute(u"name") == u"GetAll":
699
for arg in cn.getElementsByTagName(u"arg"):
700
if (arg.getAttribute(u"direction")
701
== u"out"):
702
arg.setAttribute(u"name", u"props")
703
xmlstring = document.toxml(u"utf-8")
704
document.unlink()
705
except (AttributeError, xml.dom.DOMException,
706
xml.parsers.expat.ExpatError), error:
707
logger.error(u"Failed to override Introspection method",
708
error)
709
return xmlstring
710
711
1358
if (if_tag.getAttribute("name")
1359
== "org.freedesktop.DBus.Properties"):
1360
for cn in if_tag.getElementsByTagName("method"):
1361
if cn.getAttribute("name") == "Get":
1362
for arg in cn.getElementsByTagName("arg"):
1363
if (arg.getAttribute("direction")
1364
== "out"):
1365
arg.setAttribute("name", "value")
1366
elif cn.getAttribute("name") == "GetAll":
1367
for arg in cn.getElementsByTagName("arg"):
1368
if (arg.getAttribute("direction")
1369
== "out"):
1370
arg.setAttribute("name", "props")
1371
xmlstring = document.toxml("utf-8")
1372
document.unlink()
1373
except (AttributeError, xml.dom.DOMException,
1374
xml.parsers.expat.ExpatError) as error:
1375
logger.error("Failed to override Introspection method",
1376
exc_info=error)
1377
return xmlstring
1378
1379
try:
1380
dbus.OBJECT_MANAGER_IFACE
1381
except AttributeError:
1382
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1383
1384
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1385
"""A D-Bus object with an ObjectManager.
1386
1387
Classes inheriting from this exposes the standard
1388
GetManagedObjects call and the InterfacesAdded and
1389
InterfacesRemoved signals on the standard
1390
"org.freedesktop.DBus.ObjectManager" interface.
1391
1392
Note: No signals are sent automatically; they must be sent
1393
manually.
1394
"""
1395
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1396
out_signature = "a{oa{sa{sv}}}")
1397
def GetManagedObjects(self):
1398
"""This function must be overridden"""
1399
raise NotImplementedError()
1400
1401
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1402
signature = "oa{sa{sv}}")
1403
def InterfacesAdded(self, object_path, interfaces_and_properties):
1404
pass
1405
1406
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1407
def InterfacesRemoved(self, object_path, interfaces):
1408
pass
1409
1410
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1411
out_signature = "s",
1412
path_keyword = 'object_path',
1413
connection_keyword = 'connection')
1414
def Introspect(self, object_path, connection):
1415
"""Overloading of standard D-Bus method.
1416
1417
Override return argument name of GetManagedObjects to be
1418
"objpath_interfaces_and_properties"
1419
"""
1420
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1421
object_path,
1422
connection)
1423
try:
1424
document = xml.dom.minidom.parseString(xmlstring)
1425
1426
for if_tag in document.getElementsByTagName("interface"):
1427
# Fix argument name for the GetManagedObjects method
1428
if (if_tag.getAttribute("name")
1429
== dbus.OBJECT_MANAGER_IFACE):
1430
for cn in if_tag.getElementsByTagName("method"):
1431
if (cn.getAttribute("name")
1432
== "GetManagedObjects"):
1433
for arg in cn.getElementsByTagName("arg"):
1434
if (arg.getAttribute("direction")
1435
== "out"):
1436
arg.setAttribute(
1437
"name",
1438
"objpath_interfaces"
1439
"_and_properties")
1440
xmlstring = document.toxml("utf-8")
1441
document.unlink()
1442
except (AttributeError, xml.dom.DOMException,
1443
xml.parsers.expat.ExpatError) as error:
1444
logger.error("Failed to override Introspection method",
1445
exc_info = error)
1446
return xmlstring
1447
1448
def datetime_to_dbus(dt, variant_level=0):
1449
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1450
if dt is None:
1451
return dbus.String("", variant_level = variant_level)
1452
return dbus.String(dt.isoformat(), variant_level=variant_level)
1453
1454
1455
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1456
"""A class decorator; applied to a subclass of
1457
dbus.service.Object, it will add alternate D-Bus attributes with
1458
interface names according to the "alt_interface_names" mapping.
1459
Usage:
1460
1461
@alternate_dbus_interfaces({"org.example.Interface":
1462
"net.example.AlternateInterface"})
1463
class SampleDBusObject(dbus.service.Object):
1464
@dbus.service.method("org.example.Interface")
1465
def SampleDBusMethod():
1466
pass
1467
1468
The above "SampleDBusMethod" on "SampleDBusObject" will be
1469
reachable via two interfaces: "org.example.Interface" and
1470
"net.example.AlternateInterface", the latter of which will have
1471
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1472
"true", unless "deprecate" is passed with a False value.
1473
1474
This works for methods and signals, and also for D-Bus properties
1475
(from DBusObjectWithProperties) and interfaces (from the
1476
dbus_interface_annotations decorator).
1477
"""
1478
1479
def wrapper(cls):
1480
for orig_interface_name, alt_interface_name in (
1481
alt_interface_names.items()):
1482
attr = {}
1483
interface_names = set()
1484
# Go though all attributes of the class
1485
for attrname, attribute in inspect.getmembers(cls):
1486
# Ignore non-D-Bus attributes, and D-Bus attributes
1487
# with the wrong interface name
1488
if (not hasattr(attribute, "_dbus_interface")
1489
or not attribute._dbus_interface.startswith(
1490
orig_interface_name)):
1491
continue
1492
# Create an alternate D-Bus interface name based on
1493
# the current name
1494
alt_interface = attribute._dbus_interface.replace(
1495
orig_interface_name, alt_interface_name)
1496
interface_names.add(alt_interface)
1497
# Is this a D-Bus signal?
1498
if getattr(attribute, "_dbus_is_signal", False):
1499
if sys.version_info.major == 2:
1500
# Extract the original non-method undecorated
1501
# function by black magic
1502
nonmethod_func = (dict(
1503
zip(attribute.func_code.co_freevars,
1504
attribute.__closure__))
1505
["func"].cell_contents)
1506
else:
1507
nonmethod_func = attribute
1508
# Create a new, but exactly alike, function
1509
# object, and decorate it to be a new D-Bus signal
1510
# with the alternate D-Bus interface name
1511
if sys.version_info.major == 2:
1512
new_function = types.FunctionType(
1513
nonmethod_func.func_code,
1514
nonmethod_func.func_globals,
1515
nonmethod_func.func_name,
1516
nonmethod_func.func_defaults,
1517
nonmethod_func.func_closure)
1518
else:
1519
new_function = types.FunctionType(
1520
nonmethod_func.__code__,
1521
nonmethod_func.__globals__,
1522
nonmethod_func.__name__,
1523
nonmethod_func.__defaults__,
1524
nonmethod_func.__closure__)
1525
new_function = (dbus.service.signal(
1526
alt_interface,
1527
attribute._dbus_signature)(new_function))
1528
# Copy annotations, if any
1529
try:
1530
new_function._dbus_annotations = dict(
1531
attribute._dbus_annotations)
1532
except AttributeError:
1533
pass
1534
# Define a creator of a function to call both the
1535
# original and alternate functions, so both the
1536
# original and alternate signals gets sent when
1537
# the function is called
1538
def fixscope(func1, func2):
1539
"""This function is a scope container to pass
1540
func1 and func2 to the "call_both" function
1541
outside of its arguments"""
1542
1543
@functools.wraps(func2)
1544
def call_both(*args, **kwargs):
1545
"""This function will emit two D-Bus
1546
signals by calling func1 and func2"""
1547
func1(*args, **kwargs)
1548
func2(*args, **kwargs)
1549
# Make wrapper function look like a D-Bus signal
1550
for name, attr in inspect.getmembers(func2):
1551
if name.startswith("_dbus_"):
1552
setattr(call_both, name, attr)
1553
1554
return call_both
1555
# Create the "call_both" function and add it to
1556
# the class
1557
attr[attrname] = fixscope(attribute, new_function)
1558
# Is this a D-Bus method?
1559
elif getattr(attribute, "_dbus_is_method", False):
1560
# Create a new, but exactly alike, function
1561
# object. Decorate it to be a new D-Bus method
1562
# with the alternate D-Bus interface name. Add it
1563
# to the class.
1564
attr[attrname] = (
1565
dbus.service.method(
1566
alt_interface,
1567
attribute._dbus_in_signature,
1568
attribute._dbus_out_signature)
1569
(types.FunctionType(attribute.func_code,
1570
attribute.func_globals,
1571
attribute.func_name,
1572
attribute.func_defaults,
1573
attribute.func_closure)))
1574
# Copy annotations, if any
1575
try:
1576
attr[attrname]._dbus_annotations = dict(
1577
attribute._dbus_annotations)
1578
except AttributeError:
1579
pass
1580
# Is this a D-Bus property?
1581
elif getattr(attribute, "_dbus_is_property", False):
1582
# Create a new, but exactly alike, function
1583
# object, and decorate it to be a new D-Bus
1584
# property with the alternate D-Bus interface
1585
# name. Add it to the class.
1586
attr[attrname] = (dbus_service_property(
1587
alt_interface, attribute._dbus_signature,
1588
attribute._dbus_access,
1589
attribute._dbus_get_args_options
1590
["byte_arrays"])
1591
(types.FunctionType(
1592
attribute.func_code,
1593
attribute.func_globals,
1594
attribute.func_name,
1595
attribute.func_defaults,
1596
attribute.func_closure)))
1597
# Copy annotations, if any
1598
try:
1599
attr[attrname]._dbus_annotations = dict(
1600
attribute._dbus_annotations)
1601
except AttributeError:
1602
pass
1603
# Is this a D-Bus interface?
1604
elif getattr(attribute, "_dbus_is_interface", False):
1605
# Create a new, but exactly alike, function
1606
# object. Decorate it to be a new D-Bus interface
1607
# with the alternate D-Bus interface name. Add it
1608
# to the class.
1609
attr[attrname] = (
1610
dbus_interface_annotations(alt_interface)
1611
(types.FunctionType(attribute.func_code,
1612
attribute.func_globals,
1613
attribute.func_name,
1614
attribute.func_defaults,
1615
attribute.func_closure)))
1616
if deprecate:
1617
# Deprecate all alternate interfaces
1618
iname="_AlternateDBusNames_interface_annotation{}"
1619
for interface_name in interface_names:
1620
1621
@dbus_interface_annotations(interface_name)
1622
def func(self):
1623
return { "org.freedesktop.DBus.Deprecated":
1624
"true" }
1625
# Find an unused name
1626
for aname in (iname.format(i)
1627
for i in itertools.count()):
1628
if aname not in attr:
1629
attr[aname] = func
1630
break
1631
if interface_names:
1632
# Replace the class with a new subclass of it with
1633
# methods, signals, etc. as created above.
1634
cls = type(b"{}Alternate".format(cls.__name__),
1635
(cls, ), attr)
1636
return cls
1637
1638
return wrapper
1639
1640
1641
@alternate_dbus_interfaces({"se.recompile.Mandos":
1642
"se.bsnet.fukt.Mandos"})
712
1643
class ClientDBus(Client, DBusObjectWithProperties):
713
1644
"""A Client class using D-Bus
714
1645
718
1649
"""
719
1650
720
1651
runtime_expansions = (Client.runtime_expansions
721
+ (u"dbus_object_path",))
1652
+ ("dbus_object_path", ))
1653
1654
_interface = "se.recompile.Mandos.Client"
722
1655
723
1656
# dbus.service.Object doesn't use super(), so we can't either.
724
1657
725
1658
def __init__(self, bus = None, *args, **kwargs):
726
self._approvals_pending = 0
727
1659
self.bus = bus
728
1660
Client.__init__(self, *args, **kwargs)
729
1661
# Only now, when this client is initialized, can it show up on
730
1662
# the D-Bus
731
client_object_name = unicode(self.name).translate(
732
{ord(u"."): ord(u"_"),
733
ord(u"-"): ord(u"_")})
734
self.dbus_object_path = (dbus.ObjectPath
735
(u"/clients/" + client_object_name))
1663
client_object_name = str(self.name).translate(
1664
{ord("."): ord("_"),
1665
ord("-"): ord("_")})
1666
self.dbus_object_path = dbus.ObjectPath(
1667
"/clients/" + client_object_name)
736
1668
DBusObjectWithProperties.__init__(self, self.bus,
737
1669
self.dbus_object_path)
738
739
def _get_approvals_pending(self):
740
return self._approvals_pending
741
def _set_approvals_pending(self, value):
742
old_value = self._approvals_pending
743
self._approvals_pending = value
744
bval = bool(value)
745
if (hasattr(self, "dbus_object_path")
746
and bval is not bool(old_value)):
747
dbus_bool = dbus.Boolean(bval, variant_level=1)
748
self.PropertyChanged(dbus.String(u"ApprovalPending"),
749
dbus_bool)
750
751
approvals_pending = property(_get_approvals_pending,
752
_set_approvals_pending)
753
del _get_approvals_pending, _set_approvals_pending
754
755
@staticmethod
756
def _datetime_to_dbus(dt, variant_level=0):
757
"""Convert a UTC datetime.datetime() to a D-Bus type."""
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
760
761
def enable(self):
762
oldstate = getattr(self, u"enabled", False)
763
r = Client.enable(self)
764
if oldstate != self.enabled:
765
# Emit D-Bus signals
766
self.PropertyChanged(dbus.String(u"Enabled"),
767
dbus.Boolean(True, variant_level=1))
768
self.PropertyChanged(
769
dbus.String(u"LastEnabled"),
770
self._datetime_to_dbus(self.last_enabled,
771
variant_level=1))
772
return r
773
774
def disable(self, quiet = False):
775
oldstate = getattr(self, u"enabled", False)
776
r = Client.disable(self, quiet=quiet)
777
if not quiet and oldstate != self.enabled:
778
# Emit D-Bus signal
779
self.PropertyChanged(dbus.String(u"Enabled"),
780
dbus.Boolean(False, variant_level=1))
781
return r
1670
1671
def notifychangeproperty(transform_func, dbus_name,
1672
type_func=lambda x: x,
1673
variant_level=1,
1674
invalidate_only=False,
1675
_interface=_interface):
1676
""" Modify a variable so that it's a property which announces
1677
its changes to DBus.
1678
1679
transform_fun: Function that takes a value and a variant_level
1680
and transforms it to a D-Bus type.
1681
dbus_name: D-Bus name of the variable
1682
type_func: Function that transform the value before sending it
1683
to the D-Bus. Default: no transform
1684
variant_level: D-Bus variant level. Default: 1
1685
"""
1686
attrname = "_{}".format(dbus_name)
1687
1688
def setter(self, value):
1689
if hasattr(self, "dbus_object_path"):
1690
if (not hasattr(self, attrname) or
1691
type_func(getattr(self, attrname, None))
1692
!= type_func(value)):
1693
if invalidate_only:
1694
self.PropertiesChanged(
1695
_interface, dbus.Dictionary(),
1696
dbus.Array((dbus_name, )))
1697
else:
1698
dbus_value = transform_func(
1699
type_func(value),
1700
variant_level = variant_level)
1701
self.PropertyChanged(dbus.String(dbus_name),
1702
dbus_value)
1703
self.PropertiesChanged(
1704
_interface,
1705
dbus.Dictionary({ dbus.String(dbus_name):
1706
dbus_value }),
1707
dbus.Array())
1708
setattr(self, attrname, value)
1709
1710
return property(lambda self: getattr(self, attrname), setter)
1711
1712
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1713
approvals_pending = notifychangeproperty(dbus.Boolean,
1714
"ApprovalPending",
1715
type_func = bool)
1716
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1717
last_enabled = notifychangeproperty(datetime_to_dbus,
1718
"LastEnabled")
1719
checker = notifychangeproperty(
1720
dbus.Boolean, "CheckerRunning",
1721
type_func = lambda checker: checker is not None)
1722
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1723
"LastCheckedOK")
1724
last_checker_status = notifychangeproperty(dbus.Int16,
1725
"LastCheckerStatus")
1726
last_approval_request = notifychangeproperty(
1727
datetime_to_dbus, "LastApprovalRequest")
1728
approved_by_default = notifychangeproperty(dbus.Boolean,
1729
"ApprovedByDefault")
1730
approval_delay = notifychangeproperty(
1731
dbus.UInt64, "ApprovalDelay",
1732
type_func = lambda td: td.total_seconds() * 1000)
1733
approval_duration = notifychangeproperty(
1734
dbus.UInt64, "ApprovalDuration",
1735
type_func = lambda td: td.total_seconds() * 1000)
1736
host = notifychangeproperty(dbus.String, "Host")
1737
timeout = notifychangeproperty(
1738
dbus.UInt64, "Timeout",
1739
type_func = lambda td: td.total_seconds() * 1000)
1740
extended_timeout = notifychangeproperty(
1741
dbus.UInt64, "ExtendedTimeout",
1742
type_func = lambda td: td.total_seconds() * 1000)
1743
interval = notifychangeproperty(
1744
dbus.UInt64, "Interval",
1745
type_func = lambda td: td.total_seconds() * 1000)
1746
checker_command = notifychangeproperty(dbus.String, "Checker")
1747
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1748
invalidate_only=True)
1749
1750
del notifychangeproperty
782
1751
783
1752
def __del__(self, *args, **kwargs):
784
1753
try:
785
1754
self.remove_from_connection()
786
1755
except LookupError:
787
1756
pass
788
if hasattr(DBusObjectWithProperties, u"__del__"):
1757
if hasattr(DBusObjectWithProperties, "__del__"):
789
1758
DBusObjectWithProperties.__del__(self, *args, **kwargs)
790
1759
Client.__del__(self, *args, **kwargs)
791
1760
792
def checker_callback(self, pid, condition, command,
793
*args, **kwargs):
794
self.checker_callback_tag = None
795
self.checker = None
796
# Emit D-Bus signal
797
self.PropertyChanged(dbus.String(u"CheckerRunning"),
798
dbus.Boolean(False, variant_level=1))
799
if os.WIFEXITED(condition):
800
exitstatus = os.WEXITSTATUS(condition)
1761
def checker_callback(self, source, condition,
1762
connection, command, *args, **kwargs):
1763
ret = Client.checker_callback(self, source, condition,
1764
connection, command, *args,
1765
**kwargs)
1766
exitstatus = self.last_checker_status
1767
if exitstatus >= 0:
801
1768
# Emit D-Bus signal
802
1769
self.CheckerCompleted(dbus.Int16(exitstatus),
803
dbus.Int64(condition),
1770
# This is specific to GNU libC
1771
dbus.Int64(exitstatus << 8),
804
1772
dbus.String(command))
805
1773
else:
806
1774
# Emit D-Bus signal
807
1775
self.CheckerCompleted(dbus.Int16(-1),
808
dbus.Int64(condition),
1776
dbus.Int64(
1777
# This is specific to GNU libC
1778
(exitstatus << 8)
1779
| self.last_checker_signal),
809
1780
dbus.String(command))
810
811
return Client.checker_callback(self, pid, condition, command,
812
*args, **kwargs)
813
814
def checked_ok(self, *args, **kwargs):
815
r = Client.checked_ok(self, *args, **kwargs)
816
# Emit D-Bus signal
817
self.PropertyChanged(
818
dbus.String(u"LastCheckedOK"),
819
(self._datetime_to_dbus(self.last_checked_ok,
820
variant_level=1)))
821
return r
822
823
def need_approval(self, *args, **kwargs):
824
r = Client.need_approval(self, *args, **kwargs)
825
# Emit D-Bus signal
826
self.PropertyChanged(
827
dbus.String(u"LastApprovalRequest"),
828
(self._datetime_to_dbus(self.last_approval_request,
829
variant_level=1)))
830
return r
1781
return ret
831
1782
832
1783
def start_checker(self, *args, **kwargs):
833
old_checker = self.checker
834
if self.checker is not None:
835
old_checker_pid = self.checker.pid
836
else:
837
old_checker_pid = None
1784
old_checker_pid = getattr(self.checker, "pid", None)
838
1785
r = Client.start_checker(self, *args, **kwargs)
839
1786
# Only if new checker process was started
840
1787
if (self.checker is not None
841
1788
and old_checker_pid != self.checker.pid):
842
1789
# Emit D-Bus signal
843
1790
self.CheckerStarted(self.current_checker_command)
844
self.PropertyChanged(
845
dbus.String(u"CheckerRunning"),
846
dbus.Boolean(True, variant_level=1))
847
1791
return r
848
1792
849
def stop_checker(self, *args, **kwargs):
850
old_checker = getattr(self, u"checker", None)
851
r = Client.stop_checker(self, *args, **kwargs)
852
if (old_checker is not None
853
and getattr(self, u"checker", None) is None):
854
self.PropertyChanged(dbus.String(u"CheckerRunning"),
855
dbus.Boolean(False, variant_level=1))
856
return r
857
858
1793
def _reset_approved(self):
859
self._approved = None
1794
self.approved = None
860
1795
return False
861
1796
862
1797
def approve(self, value=True):
1798
self.approved = value
1799
gobject.timeout_add(int(self.approval_duration.total_seconds()
1800
* 1000), self._reset_approved)
863
1801
self.send_changedstate()
864
self._approved = value
865
gobject.timeout_add(self._timedelta_to_milliseconds
866
(self.approval_duration),
867
self._reset_approved)
868
869
1802
870
1803
## D-Bus methods, signals & properties
871
_interface = u"se.bsnet.fukt.Mandos.Client"
1804
1805
## Interfaces
872
1806
873
1807
## Signals
874
1808
875
1809
# CheckerCompleted - signal
876
@dbus.service.signal(_interface, signature=u"nxs")
1810
@dbus.service.signal(_interface, signature="nxs")
877
1811
def CheckerCompleted(self, exitcode, waitstatus, command):
878
1812
"D-Bus signal"
879
1813
pass
880
1814
881
1815
# CheckerStarted - signal
882
@dbus.service.signal(_interface, signature=u"s")
1816
@dbus.service.signal(_interface, signature="s")
883
1817
def CheckerStarted(self, command):
884
1818
"D-Bus signal"
885
1819
pass
886
1820
887
1821
# PropertyChanged - signal
888
@dbus.service.signal(_interface, signature=u"sv")
1822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1823
@dbus.service.signal(_interface, signature="sv")
889
1824
def PropertyChanged(self, property, value):
890
1825
"D-Bus signal"
891
1826
pass
900
1835
pass
901
1836
902
1837
# Rejected - signal
903
@dbus.service.signal(_interface, signature=u"s")
1838
@dbus.service.signal(_interface, signature="s")
904
1839
def Rejected(self, reason):
905
1840
"D-Bus signal"
906
1841
pass
907
1842
908
1843
# NeedApproval - signal
909
@dbus.service.signal(_interface, signature=u"tb")
1844
@dbus.service.signal(_interface, signature="tb")
910
1845
def NeedApproval(self, timeout, default):
911
1846
"D-Bus signal"
912
1847
return self.need_approval()
914
1849
## Methods
915
1850
916
1851
# Approve - method
917
@dbus.service.method(_interface, in_signature=u"b")
1852
@dbus.service.method(_interface, in_signature="b")
918
1853
def Approve(self, value):
919
1854
self.approve(value)
920
1855
921
1856
# CheckedOK - method
922
1857
@dbus.service.method(_interface)
923
1858
def CheckedOK(self):
924
return self.checked_ok()
1859
self.checked_ok()
925
1860
926
1861
# Enable - method
1862
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
927
1863
@dbus.service.method(_interface)
928
1864
def Enable(self):
929
1865
"D-Bus method"
930
1866
self.enable()
931
1867
932
1868
# StartChecker - method
1869
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
933
1870
@dbus.service.method(_interface)
934
1871
def StartChecker(self):
935
1872
"D-Bus method"
936
1873
self.start_checker()
937
1874
938
1875
# Disable - method
1876
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
939
1877
@dbus.service.method(_interface)
940
1878
def Disable(self):
941
1879
"D-Bus method"
942
1880
self.disable()
943
1881
944
1882
# StopChecker - method
1883
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
945
1884
@dbus.service.method(_interface)
946
1885
def StopChecker(self):
947
1886
self.stop_checker()
949
1888
## Properties
950
1889
951
1890
# ApprovalPending - property
952
@dbus_service_property(_interface, signature=u"b", access=u"read")
1891
@dbus_service_property(_interface, signature="b", access="read")
953
1892
def ApprovalPending_dbus_property(self):
954
1893
return dbus.Boolean(bool(self.approvals_pending))
955
1894
956
1895
# ApprovedByDefault - property
957
@dbus_service_property(_interface, signature=u"b",
958
access=u"readwrite")
1896
@dbus_service_property(_interface,
1897
signature="b",
1898
access="readwrite")
959
1899
def ApprovedByDefault_dbus_property(self, value=None):
960
1900
if value is None: # get
961
1901
return dbus.Boolean(self.approved_by_default)
962
1902
self.approved_by_default = bool(value)
963
# Emit D-Bus signal
964
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
965
dbus.Boolean(value, variant_level=1))
966
1903
967
1904
# ApprovalDelay - property
968
@dbus_service_property(_interface, signature=u"t",
969
access=u"readwrite")
1905
@dbus_service_property(_interface,
1906
signature="t",
1907
access="readwrite")
970
1908
def ApprovalDelay_dbus_property(self, value=None):
971
1909
if value is None: # get
972
return dbus.UInt64(self.approval_delay_milliseconds())
1910
return dbus.UInt64(self.approval_delay.total_seconds()
1911
* 1000)
973
1912
self.approval_delay = datetime.timedelta(0, 0, 0, value)
974
# Emit D-Bus signal
975
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
976
dbus.UInt64(value, variant_level=1))
977
1913
978
1914
# ApprovalDuration - property
979
@dbus_service_property(_interface, signature=u"t",
980
access=u"readwrite")
1915
@dbus_service_property(_interface,
1916
signature="t",
1917
access="readwrite")
981
1918
def ApprovalDuration_dbus_property(self, value=None):
982
1919
if value is None: # get
983
return dbus.UInt64(self._timedelta_to_milliseconds(
984
self.approval_duration))
1920
return dbus.UInt64(self.approval_duration.total_seconds()
1921
* 1000)
985
1922
self.approval_duration = datetime.timedelta(0, 0, 0, value)
986
# Emit D-Bus signal
987
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
988
dbus.UInt64(value, variant_level=1))
989
1923
990
1924
# Name - property
991
@dbus_service_property(_interface, signature=u"s", access=u"read")
1925
@dbus_annotations(
1926
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1927
@dbus_service_property(_interface, signature="s", access="read")
992
1928
def Name_dbus_property(self):
993
1929
return dbus.String(self.name)
994
1930
995
1931
# Fingerprint - property
996
@dbus_service_property(_interface, signature=u"s", access=u"read")
1932
@dbus_annotations(
1933
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1934
@dbus_service_property(_interface, signature="s", access="read")
997
1935
def Fingerprint_dbus_property(self):
998
1936
return dbus.String(self.fingerprint)
999
1937
1000
1938
# Host - property
1001
@dbus_service_property(_interface, signature=u"s",
1002
access=u"readwrite")
1939
@dbus_service_property(_interface,
1940
signature="s",
1941
access="readwrite")
1003
1942
def Host_dbus_property(self, value=None):
1004
1943
if value is None: # get
1005
1944
return dbus.String(self.host)
1006
self.host = value
1007
# Emit D-Bus signal
1008
self.PropertyChanged(dbus.String(u"Host"),
1009
dbus.String(value, variant_level=1))
1945
self.host = str(value)
1010
1946
1011
1947
# Created - property
1012
@dbus_service_property(_interface, signature=u"s", access=u"read")
1948
@dbus_annotations(
1949
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1950
@dbus_service_property(_interface, signature="s", access="read")
1013
1951
def Created_dbus_property(self):
1014
return dbus.String(self._datetime_to_dbus(self.created))
1952
return datetime_to_dbus(self.created)
1015
1953
1016
1954
# LastEnabled - property
1017
@dbus_service_property(_interface, signature=u"s", access=u"read")
1955
@dbus_service_property(_interface, signature="s", access="read")
1018
1956
def LastEnabled_dbus_property(self):
1019
if self.last_enabled is None:
1020
return dbus.String(u"")
1021
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1957
return datetime_to_dbus(self.last_enabled)
1022
1958
1023
1959
# Enabled - property
1024
@dbus_service_property(_interface, signature=u"b",
1025
access=u"readwrite")
1960
@dbus_service_property(_interface,
1961
signature="b",
1962
access="readwrite")
1026
1963
def Enabled_dbus_property(self, value=None):
1027
1964
if value is None: # get
1028
1965
return dbus.Boolean(self.enabled)
1032
1969
self.disable()
1033
1970
1034
1971
# LastCheckedOK - property
1035
@dbus_service_property(_interface, signature=u"s",
1036
access=u"readwrite")
1972
@dbus_service_property(_interface,
1973
signature="s",
1974
access="readwrite")
1037
1975
def LastCheckedOK_dbus_property(self, value=None):
1038
1976
if value is not None:
1039
1977
self.checked_ok()
1040
1978
return
1041
if self.last_checked_ok is None:
1042
return dbus.String(u"")
1043
return dbus.String(self._datetime_to_dbus(self
1044
.last_checked_ok))
1979
return datetime_to_dbus(self.last_checked_ok)
1980
1981
# LastCheckerStatus - property
1982
@dbus_service_property(_interface, signature="n", access="read")
1983
def LastCheckerStatus_dbus_property(self):
1984
return dbus.Int16(self.last_checker_status)
1985
1986
# Expires - property
1987
@dbus_service_property(_interface, signature="s", access="read")
1988
def Expires_dbus_property(self):
1989
return datetime_to_dbus(self.expires)
1045
1990
1046
1991
# LastApprovalRequest - property
1047
@dbus_service_property(_interface, signature=u"s", access=u"read")
1992
@dbus_service_property(_interface, signature="s", access="read")
1048
1993
def LastApprovalRequest_dbus_property(self):
1049
if self.last_approval_request is None:
1050
return dbus.String(u"")
1051
return dbus.String(self.
1052
_datetime_to_dbus(self
1053
.last_approval_request))
1994
return datetime_to_dbus(self.last_approval_request)
1054
1995
1055
1996
# Timeout - property
1056
@dbus_service_property(_interface, signature=u"t",
1057
access=u"readwrite")
1997
@dbus_service_property(_interface,
1998
signature="t",
1999
access="readwrite")
1058
2000
def Timeout_dbus_property(self, value=None):
1059
2001
if value is None: # get
1060
return dbus.UInt64(self.timeout_milliseconds())
2002
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2003
old_timeout = self.timeout
1061
2004
self.timeout = datetime.timedelta(0, 0, 0, value)
1062
# Emit D-Bus signal
1063
self.PropertyChanged(dbus.String(u"Timeout"),
1064
dbus.UInt64(value, variant_level=1))
1065
if getattr(self, u"disable_initiator_tag", None) is None:
1066
return
1067
# Reschedule timeout
1068
gobject.source_remove(self.disable_initiator_tag)
1069
self.disable_initiator_tag = None
1070
time_to_die = (self.
1071
_timedelta_to_milliseconds((self
1072
.last_checked_ok
1073
+ self.timeout)
1074
- datetime.datetime
1075
.utcnow()))
1076
if time_to_die <= 0:
1077
# The timeout has passed
1078
self.disable()
1079
else:
1080
self.disable_initiator_tag = (gobject.timeout_add
1081
(time_to_die, self.disable))
2005
# Reschedule disabling
2006
if self.enabled:
2007
now = datetime.datetime.utcnow()
2008
self.expires += self.timeout - old_timeout
2009
if self.expires <= now:
2010
# The timeout has passed
2011
self.disable()
2012
else:
2013
if (getattr(self, "disable_initiator_tag", None)
2014
is None):
2015
return
2016
gobject.source_remove(self.disable_initiator_tag)
2017
self.disable_initiator_tag = gobject.timeout_add(
2018
int((self.expires - now).total_seconds() * 1000),
2019
self.disable)
2020
2021
# ExtendedTimeout - property
2022
@dbus_service_property(_interface,
2023
signature="t",
2024
access="readwrite")
2025
def ExtendedTimeout_dbus_property(self, value=None):
2026
if value is None: # get
2027
return dbus.UInt64(self.extended_timeout.total_seconds()
2028
* 1000)
2029
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1082
2030
1083
2031
# Interval - property
1084
@dbus_service_property(_interface, signature=u"t",
1085
access=u"readwrite")
2032
@dbus_service_property(_interface,
2033
signature="t",
2034
access="readwrite")
1086
2035
def Interval_dbus_property(self, value=None):
1087
2036
if value is None: # get
1088
return dbus.UInt64(self.interval_milliseconds())
2037
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
2038
self.interval = datetime.timedelta(0, 0, 0, value)
1090
# Emit D-Bus signal
1091
self.PropertyChanged(dbus.String(u"Interval"),
1092
dbus.UInt64(value, variant_level=1))
1093
if getattr(self, u"checker_initiator_tag", None) is None:
2039
if getattr(self, "checker_initiator_tag", None) is None:
1094
2040
return
1095
# Reschedule checker run
1096
gobject.source_remove(self.checker_initiator_tag)
1097
self.checker_initiator_tag = (gobject.timeout_add
1098
(value, self.start_checker))
1099
self.start_checker() # Start one now, too
1100
2041
if self.enabled:
2042
# Reschedule checker run
2043
gobject.source_remove(self.checker_initiator_tag)
2044
self.checker_initiator_tag = gobject.timeout_add(
2045
value, self.start_checker)
2046
self.start_checker() # Start one now, too
2047
1101
2048
# Checker - property
1102
@dbus_service_property(_interface, signature=u"s",
1103
access=u"readwrite")
2049
@dbus_service_property(_interface,
2050
signature="s",
2051
access="readwrite")
1104
2052
def Checker_dbus_property(self, value=None):
1105
2053
if value is None: # get
1106
2054
return dbus.String(self.checker_command)
1107
self.checker_command = value
1108
# Emit D-Bus signal
1109
self.PropertyChanged(dbus.String(u"Checker"),
1110
dbus.String(self.checker_command,
1111
variant_level=1))
2055
self.checker_command = str(value)
1112
2056
1113
2057
# CheckerRunning - property
1114
@dbus_service_property(_interface, signature=u"b",
1115
access=u"readwrite")
2058
@dbus_service_property(_interface,
2059
signature="b",
2060
access="readwrite")
1116
2061
def CheckerRunning_dbus_property(self, value=None):
1117
2062
if value is None: # get
1118
2063
return dbus.Boolean(self.checker is not None)
1122
2067
self.stop_checker()
1123
2068
1124
2069
# ObjectPath - property
1125
@dbus_service_property(_interface, signature=u"o", access=u"read")
2070
@dbus_annotations(
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2072
"org.freedesktop.DBus.Deprecated": "true"})
2073
@dbus_service_property(_interface, signature="o", access="read")
1126
2074
def ObjectPath_dbus_property(self):
1127
2075
return self.dbus_object_path # is already a dbus.ObjectPath
1128
2076
1129
2077
# Secret = property
1130
@dbus_service_property(_interface, signature=u"ay",
1131
access=u"write", byte_arrays=True)
2078
@dbus_annotations(
2079
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2080
"invalidates"})
2081
@dbus_service_property(_interface,
2082
signature="ay",
2083
access="write",
2084
byte_arrays=True)
1132
2085
def Secret_dbus_property(self, value):
1133
self.secret = str(value)
2086
self.secret = bytes(value)
1134
2087
1135
2088
del _interface
1136
2089
1140
2093
self._pipe = child_pipe
1141
2094
self._pipe.send(('init', fpr, address))
1142
2095
if not self._pipe.recv():
1143
raise KeyError()
1144
2096
raise KeyError(fpr)
2097
1145
2098
def __getattribute__(self, name):
1146
if(name == '_pipe'):
2099
if name == '_pipe':
1147
2100
return super(ProxyClient, self).__getattribute__(name)
1148
2101
self._pipe.send(('getattr', name))
1149
2102
data = self._pipe.recv()
1150
2103
if data[0] == 'data':
1151
2104
return data[1]
1152
2105
if data[0] == 'function':
2106
1153
2107
def func(*args, **kwargs):
1154
2108
self._pipe.send(('funcall', name, args, kwargs))
1155
2109
return self._pipe.recv()[1]
2110
1156
2111
return func
1157
2112
1158
2113
def __setattr__(self, name, value):
1159
if(name == '_pipe'):
2114
if name == '_pipe':
1160
2115
return super(ProxyClient, self).__setattr__(name, value)
1161
2116
self._pipe.send(('setattr', name, value))
1162
2117
1169
2124
1170
2125
def handle(self):
1171
2126
with contextlib.closing(self.server.child_pipe) as child_pipe:
1172
logger.info(u"TCP connection from: %s",
1173
unicode(self.client_address))
1174
logger.debug(u"Pipe FD: %d",
2127
logger.info("TCP connection from: %s",
2128
str(self.client_address))
2129
logger.debug("Pipe FD: %d",
1175
2130
self.server.child_pipe.fileno())
1176
1177
session = (gnutls.connection
1178
.ClientSession(self.request,
1179
gnutls.connection
1180
.X509Credentials()))
1181
1182
# Note: gnutls.connection.X509Credentials is really a
1183
# generic GnuTLS certificate credentials object so long as
1184
# no X.509 keys are added to it. Therefore, we can use it
1185
# here despite using OpenPGP certificates.
1186
1187
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1188
# u"+AES-256-CBC", u"+SHA1",
1189
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1190
# u"+DHE-DSS"))
2131
2132
session = gnutls.ClientSession(self.request)
2133
2134
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2135
# "+AES-256-CBC", "+SHA1",
2136
# "+COMP-NULL", "+CTYPE-OPENPGP",
2137
# "+DHE-DSS"))
1191
2138
# Use a fallback default, since this MUST be set.
1192
2139
priority = self.server.gnutls_priority
1193
2140
if priority is None:
1194
priority = u"NORMAL"
1195
(gnutls.library.functions
1196
.gnutls_priority_set_direct(session._c_object,
1197
priority, None))
1198
2141
priority = "NORMAL"
2142
gnutls.priority_set_direct(session._c_object, priority,
2143
None)
2144
1199
2145
# Start communication using the Mandos protocol
1200
2146
# Get protocol number
1201
2147
line = self.request.makefile().readline()
1202
logger.debug(u"Protocol version: %r", line)
2148
logger.debug("Protocol version: %r", line)
1203
2149
try:
1204
2150
if int(line.strip().split()[0]) > 1:
1205
raise RuntimeError
1206
except (ValueError, IndexError, RuntimeError), error:
1207
logger.error(u"Unknown protocol version: %s", error)
2151
raise RuntimeError(line)
2152
except (ValueError, IndexError, RuntimeError) as error:
2153
logger.error("Unknown protocol version: %s", error)
1208
2154
return
1209
2155
1210
2156
# Start GnuTLS connection
1211
2157
try:
1212
2158
session.handshake()
1213
except gnutls.errors.GNUTLSError, error:
1214
logger.warning(u"Handshake failed: %s", error)
2159
except gnutls.Error as error:
2160
logger.warning("Handshake failed: %s", error)
1215
2161
# Do not run session.bye() here: the session is not
1216
2162
# established. Just abandon the request.
1217
2163
return
1218
logger.debug(u"Handshake succeeded")
1219
2164
logger.debug("Handshake succeeded")
2165
1220
2166
approval_required = False
1221
2167
try:
1222
2168
try:
1223
fpr = self.fingerprint(self.peer_certificate
1224
(session))
1225
except (TypeError, gnutls.errors.GNUTLSError), error:
1226
logger.warning(u"Bad certificate: %s", error)
2169
fpr = self.fingerprint(
2170
self.peer_certificate(session))
2171
except (TypeError, gnutls.Error) as error:
2172
logger.warning("Bad certificate: %s", error)
1227
2173
return
1228
logger.debug(u"Fingerprint: %s", fpr)
1229
2174
logger.debug("Fingerprint: %s", fpr)
2175
1230
2176
try:
1231
2177
client = ProxyClient(child_pipe, fpr,
1232
2178
self.client_address)
1240
2186
1241
2187
while True:
1242
2188
if not client.enabled:
1243
logger.warning(u"Client %s is disabled",
1244
client.name)
2189
logger.info("Client %s is disabled",
2190
client.name)
1245
2191
if self.server.use_dbus:
1246
2192
# Emit D-Bus signal
1247
client.Rejected("Disabled")
2193
client.Rejected("Disabled")
1248
2194
return
1249
2195
1250
if client._approved or not client.approval_delay:
2196
if client.approved or not client.approval_delay:
1251
2197
#We are approved or approval is disabled
1252
2198
break
1253
elif client._approved is None:
1254
logger.info(u"Client %s needs approval",
2199
elif client.approved is None:
2200
logger.info("Client %s needs approval",
1255
2201
client.name)
1256
2202
if self.server.use_dbus:
1257
2203
# Emit D-Bus signal
1258
2204
client.NeedApproval(
1259
client.approval_delay_milliseconds(),
1260
client.approved_by_default)
2205
client.approval_delay.total_seconds()
2206
* 1000, client.approved_by_default)
1261
2207
else:
1262
logger.warning(u"Client %s was not approved",
2208
logger.warning("Client %s was not approved",
1263
2209
client.name)
1264
2210
if self.server.use_dbus:
1265
2211
# Emit D-Bus signal
1267
2213
return
1268
2214
1269
2215
#wait until timeout or approved
1270
#x = float(client._timedelta_to_milliseconds(delay))
1271
2216
time = datetime.datetime.now()
1272
2217
client.changedstate.acquire()
1273
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2218
client.changedstate.wait(delay.total_seconds())
1274
2219
client.changedstate.release()
1275
2220
time2 = datetime.datetime.now()
1276
2221
if (time2 - time) >= delay:
1287
2232
else:
1288
2233
delay -= time2 - time
1289
2234
1290
sent_size = 0
1291
while sent_size < len(client.secret):
1292
try:
1293
sent = session.send(client.secret[sent_size:])
1294
except (gnutls.errors.GNUTLSError), error:
1295
logger.warning("gnutls send failed")
1296
return
1297
logger.debug(u"Sent: %d, remaining: %d",
1298
sent, len(client.secret)
1299
- (sent_size + sent))
1300
sent_size += sent
1301
1302
logger.info(u"Sending secret to %s", client.name)
1303
# bump the timeout as if seen
1304
client.checked_ok()
2235
try:
2236
session.send(client.secret)
2237
except gnutls.Error as error:
2238
logger.warning("gnutls send failed",
2239
exc_info = error)
2240
return
2241
2242
logger.info("Sending secret to %s", client.name)
2243
# bump the timeout using extended_timeout
2244
client.bump_timeout(client.extended_timeout)
1305
2245
if self.server.use_dbus:
1306
2246
# Emit D-Bus signal
1307
2247
client.GotSecret()
1311
2251
client.approvals_pending -= 1
1312
2252
try:
1313
2253
session.bye()
1314
except (gnutls.errors.GNUTLSError), error:
1315
logger.warning("GnuTLS bye failed")
2254
except gnutls.Error as error:
2255
logger.warning("GnuTLS bye failed",
2256
exc_info=error)
1316
2257
1317
2258
@staticmethod
1318
2259
def peer_certificate(session):
1319
2260
"Return the peer's OpenPGP certificate as a bytestring"
1320
2261
# If not an OpenPGP certificate...
1321
if (gnutls.library.functions
1322
.gnutls_certificate_type_get(session._c_object)
1323
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1324
# ...do the normal thing
1325
return session.peer_certificate
2262
if (gnutls.certificate_type_get(session._c_object)
2263
!= gnutls.CRT_OPENPGP):
2264
# ...return invalid data
2265
return b""
1326
2266
list_size = ctypes.c_uint(1)
1327
cert_list = (gnutls.library.functions
1328
.gnutls_certificate_get_peers
2267
cert_list = (gnutls.certificate_get_peers
1329
2268
(session._c_object, ctypes.byref(list_size)))
1330
2269
if not bool(cert_list) and list_size.value != 0:
1331
raise gnutls.errors.GNUTLSError(u"error getting peer"
1332
u" certificate")
2270
raise gnutls.Error("error getting peer certificate")
1333
2271
if list_size.value == 0:
1334
2272
return None
1335
2273
cert = cert_list[0]
1339
2277
def fingerprint(openpgp):
1340
2278
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1341
2279
# New GnuTLS "datum" with the OpenPGP public key
1342
datum = (gnutls.library.types
1343
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1344
ctypes.POINTER
1345
(ctypes.c_ubyte)),
1346
ctypes.c_uint(len(openpgp))))
2280
datum = gnutls.datum_t(
2281
ctypes.cast(ctypes.c_char_p(openpgp),
2282
ctypes.POINTER(ctypes.c_ubyte)),
2283
ctypes.c_uint(len(openpgp)))
1347
2284
# New empty GnuTLS certificate
1348
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1349
(gnutls.library.functions
1350
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2285
crt = gnutls.openpgp_crt_t()
2286
gnutls.openpgp_crt_init(ctypes.byref(crt))
1351
2287
# Import the OpenPGP public key into the certificate
1352
(gnutls.library.functions
1353
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1354
gnutls.library.constants
1355
.GNUTLS_OPENPGP_FMT_RAW))
2288
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2289
gnutls.OPENPGP_FMT_RAW)
1356
2290
# Verify the self signature in the key
1357
2291
crtverify = ctypes.c_uint()
1358
(gnutls.library.functions
1359
.gnutls_openpgp_crt_verify_self(crt, 0,
1360
ctypes.byref(crtverify)))
2292
gnutls.openpgp_crt_verify_self(crt, 0,
2293
ctypes.byref(crtverify))
1361
2294
if crtverify.value != 0:
1362
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1363
raise (gnutls.errors.CertificateSecurityError
1364
(u"Verify failed"))
2295
gnutls.openpgp_crt_deinit(crt)
2296
raise gnutls.CertificateSecurityError("Verify failed")
1365
2297
# New buffer for the fingerprint
1366
2298
buf = ctypes.create_string_buffer(20)
1367
2299
buf_len = ctypes.c_size_t()
1368
2300
# Get the fingerprint from the certificate into the buffer
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1371
ctypes.byref(buf_len)))
2301
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2302
ctypes.byref(buf_len))
1372
2303
# Deinit the certificate
1373
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2304
gnutls.openpgp_crt_deinit(crt)
1374
2305
# Convert the buffer to a Python bytestring
1375
2306
fpr = ctypes.string_at(buf, buf_len.value)
1376
2307
# Convert the bytestring to hexadecimal notation
1377
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
2308
hex_fpr = binascii.hexlify(fpr).upper()
1378
2309
return hex_fpr
1379
2310
1380
2311
1381
2312
class MultiprocessingMixIn(object):
1382
2313
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2314
1383
2315
def sub_process_main(self, request, address):
1384
2316
try:
1385
2317
self.finish_request(request, address)
1386
except:
2318
except Exception:
1387
2319
self.handle_error(request, address)
1388
2320
self.close_request(request)
1389
2321
1390
2322
def process_request(self, request, address):
1391
2323
"""Start a new process to process the request."""
1392
multiprocessing.Process(target = self.sub_process_main,
1393
args = (request, address)).start()
2324
proc = multiprocessing.Process(target = self.sub_process_main,
2325
args = (request, address))
2326
proc.start()
2327
return proc
2328
1394
2329
1395
2330
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1396
2331
""" adds a pipe to the MixIn """
2332
1397
2333
def process_request(self, request, client_address):
1398
2334
"""Overrides and wraps the original process_request().
1399
2335
1400
2336
This function creates a new pipe in self.pipe
1401
2337
"""
1402
2338
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1403
1404
super(MultiprocessingMixInWithPipe,
1405
self).process_request(request, client_address)
2339
2340
proc = MultiprocessingMixIn.process_request(self, request,
2341
client_address)
1406
2342
self.child_pipe.close()
1407
self.add_pipe(parent_pipe)
1408
1409
def add_pipe(self, parent_pipe):
2343
self.add_pipe(parent_pipe, proc)
2344
2345
def add_pipe(self, parent_pipe, proc):
1410
2346
"""Dummy function; override as necessary"""
1411
pass
2347
raise NotImplementedError()
2348
1412
2349
1413
2350
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1414
2351
socketserver.TCPServer, object):
1419
2356
interface: None or a network interface name (string)
1420
2357
use_ipv6: Boolean; to use IPv6 or not
1421
2358
"""
2359
1422
2360
def __init__(self, server_address, RequestHandlerClass,
1423
interface=None, use_ipv6=True):
2361
interface=None,
2362
use_ipv6=True,
2363
socketfd=None):
2364
"""If socketfd is set, use that file descriptor instead of
2365
creating a new one with socket.socket().
2366
"""
1424
2367
self.interface = interface
1425
2368
if use_ipv6:
1426
2369
self.address_family = socket.AF_INET6
2370
if socketfd is not None:
2371
# Save the file descriptor
2372
self.socketfd = socketfd
2373
# Save the original socket.socket() function
2374
self.socket_socket = socket.socket
2375
# To implement --socket, we monkey patch socket.socket.
2376
#
2377
# (When socketserver.TCPServer is a new-style class, we
2378
# could make self.socket into a property instead of monkey
2379
# patching socket.socket.)
2380
#
2381
# Create a one-time-only replacement for socket.socket()
2382
@functools.wraps(socket.socket)
2383
def socket_wrapper(*args, **kwargs):
2384
# Restore original function so subsequent calls are
2385
# not affected.
2386
socket.socket = self.socket_socket
2387
del self.socket_socket
2388
# This time only, return a new socket object from the
2389
# saved file descriptor.
2390
return socket.fromfd(self.socketfd, *args, **kwargs)
2391
# Replace socket.socket() function with wrapper
2392
socket.socket = socket_wrapper
2393
# The socketserver.TCPServer.__init__ will call
2394
# socket.socket(), which might be our replacement,
2395
# socket_wrapper(), if socketfd was set.
1427
2396
socketserver.TCPServer.__init__(self, server_address,
1428
2397
RequestHandlerClass)
2398
1429
2399
def server_bind(self):
1430
2400
"""This overrides the normal server_bind() function
1431
2401
to bind to an interface if one was specified, and also NOT to
1432
2402
bind to an address or port if they were not specified."""
1433
2403
if self.interface is not None:
1434
2404
if SO_BINDTODEVICE is None:
1435
logger.error(u"SO_BINDTODEVICE does not exist;"
1436
u" cannot bind to interface %s",
2405
logger.error("SO_BINDTODEVICE does not exist;"
2406
" cannot bind to interface %s",
1437
2407
self.interface)
1438
2408
else:
1439
2409
try:
1440
self.socket.setsockopt(socket.SOL_SOCKET,
1441
SO_BINDTODEVICE,
1442
str(self.interface
1443
+ u'\0'))
1444
except socket.error, error:
1445
if error[0] == errno.EPERM:
1446
logger.error(u"No permission to"
1447
u" bind to interface %s",
1448
self.interface)
1449
elif error[0] == errno.ENOPROTOOPT:
1450
logger.error(u"SO_BINDTODEVICE not available;"
1451
u" cannot bind to interface %s",
1452
self.interface)
2410
self.socket.setsockopt(
2411
socket.SOL_SOCKET, SO_BINDTODEVICE,
2412
(self.interface + "\0").encode("utf-8"))
2413
except socket.error as error:
2414
if error.errno == errno.EPERM:
2415
logger.error("No permission to bind to"
2416
" interface %s", self.interface)
2417
elif error.errno == errno.ENOPROTOOPT:
2418
logger.error("SO_BINDTODEVICE not available;"
2419
" cannot bind to interface %s",
2420
self.interface)
2421
elif error.errno == errno.ENODEV:
2422
logger.error("Interface %s does not exist,"
2423
" cannot bind", self.interface)
1453
2424
else:
1454
2425
raise
1455
2426
# Only bind(2) the socket if we really need to.
1456
2427
if self.server_address[0] or self.server_address[1]:
1457
2428
if not self.server_address[0]:
1458
2429
if self.address_family == socket.AF_INET6:
1459
any_address = u"::" # in6addr_any
2430
any_address = "::" # in6addr_any
1460
2431
else:
1461
any_address = socket.INADDR_ANY
2432
any_address = "0.0.0.0" # INADDR_ANY
1462
2433
self.server_address = (any_address,
1463
2434
self.server_address[1])
1464
2435
elif not self.server_address[1]:
1465
self.server_address = (self.server_address[0],
1466
0)
2436
self.server_address = (self.server_address[0], 0)
1467
2437
# if self.interface:
1468
2438
# self.server_address = (self.server_address[0],
1469
2439
# 0, # port
1483
2453
1484
2454
Assumes a gobject.MainLoop event loop.
1485
2455
"""
2456
1486
2457
def __init__(self, server_address, RequestHandlerClass,
1487
interface=None, use_ipv6=True, clients=None,
1488
gnutls_priority=None, use_dbus=True):
2458
interface=None,
2459
use_ipv6=True,
2460
clients=None,
2461
gnutls_priority=None,
2462
use_dbus=True,
2463
socketfd=None):
1489
2464
self.enabled = False
1490
2465
self.clients = clients
1491
2466
if self.clients is None:
1492
self.clients = set()
2467
self.clients = {}
1493
2468
self.use_dbus = use_dbus
1494
2469
self.gnutls_priority = gnutls_priority
1495
2470
IPv6_TCPServer.__init__(self, server_address,
1496
2471
RequestHandlerClass,
1497
2472
interface = interface,
1498
use_ipv6 = use_ipv6)
2473
use_ipv6 = use_ipv6,
2474
socketfd = socketfd)
2475
1499
2476
def server_activate(self):
1500
2477
if self.enabled:
1501
2478
return socketserver.TCPServer.server_activate(self)
2479
1502
2480
def enable(self):
1503
2481
self.enabled = True
1504
def add_pipe(self, parent_pipe):
2482
2483
def add_pipe(self, parent_pipe, proc):
1505
2484
# Call "handle_ipc" for both data and EOF events
1506
gobject.io_add_watch(parent_pipe.fileno(),
1507
gobject.IO_IN | gobject.IO_HUP,
1508
functools.partial(self.handle_ipc,
1509
parent_pipe = parent_pipe))
1510
1511
def handle_ipc(self, source, condition, parent_pipe=None,
2485
gobject.io_add_watch(
2486
parent_pipe.fileno(),
2487
gobject.IO_IN | gobject.IO_HUP,
2488
functools.partial(self.handle_ipc,
2489
parent_pipe = parent_pipe,
2490
proc = proc))
2491
2492
def handle_ipc(self, source, condition,
2493
parent_pipe=None,
2494
proc = None,
1512
2495
client_object=None):
1513
condition_names = {
1514
gobject.IO_IN: u"IN", # There is data to read.
1515
gobject.IO_OUT: u"OUT", # Data can be written (without
1516
# blocking).
1517
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1518
gobject.IO_ERR: u"ERR", # Error condition.
1519
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1520
# broken, usually for pipes and
1521
# sockets).
1522
}
1523
conditions_string = ' | '.join(name
1524
for cond, name in
1525
condition_names.iteritems()
1526
if cond & condition)
1527
# error or the other end of multiprocessing.Pipe has closed
1528
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2496
# error, or the other end of multiprocessing.Pipe has closed
2497
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2498
# Wait for other process to exit
2499
proc.join()
1529
2500
return False
1530
2501
1531
2502
# Read a request from the child
1536
2507
fpr = request[1]
1537
2508
address = request[2]
1538
2509
1539
for c in self.clients:
2510
for c in self.clients.itervalues():
1540
2511
if c.fingerprint == fpr:
1541
2512
client = c
1542
2513
break
1543
2514
else:
1544
logger.warning(u"Client not found for fingerprint: %s, ad"
1545
u"dress: %s", fpr, address)
2515
logger.info("Client not found for fingerprint: %s, ad"
2516
"dress: %s", fpr, address)
1546
2517
if self.use_dbus:
1547
2518
# Emit D-Bus signal
1548
mandos_dbus_service.ClientNotFound(fpr, address[0])
2519
mandos_dbus_service.ClientNotFound(fpr,
2520
address[0])
1549
2521
parent_pipe.send(False)
1550
2522
return False
1551
2523
1552
gobject.io_add_watch(parent_pipe.fileno(),
1553
gobject.IO_IN | gobject.IO_HUP,
1554
functools.partial(self.handle_ipc,
1555
parent_pipe = parent_pipe,
1556
client_object = client))
2524
gobject.io_add_watch(
2525
parent_pipe.fileno(),
2526
gobject.IO_IN | gobject.IO_HUP,
2527
functools.partial(self.handle_ipc,
2528
parent_pipe = parent_pipe,
2529
proc = proc,
2530
client_object = client))
1557
2531
parent_pipe.send(True)
1558
# remove the old hook in favor of the new above hook on same fileno
2532
# remove the old hook in favor of the new above hook on
2533
# same fileno
1559
2534
return False
1560
2535
if command == 'funcall':
1561
2536
funcname = request[1]
1562
2537
args = request[2]
1563
2538
kwargs = request[3]
1564
2539
1565
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1566
2540
parent_pipe.send(('data', getattr(client_object,
2541
funcname)(*args,
2542
**kwargs)))
2543
1567
2544
if command == 'getattr':
1568
2545
attrname = request[1]
1569
if callable(client_object.__getattribute__(attrname)):
1570
parent_pipe.send(('function',))
2546
if isinstance(client_object.__getattribute__(attrname),
2547
collections.Callable):
2548
parent_pipe.send(('function', ))
1571
2549
else:
1572
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2550
parent_pipe.send((
2551
'data', client_object.__getattribute__(attrname)))
1573
2552
1574
2553
if command == 'setattr':
1575
2554
attrname = request[1]
1576
2555
value = request[2]
1577
2556
setattr(client_object, attrname, value)
1578
2557
1579
2558
return True
1580
2559
1581
2560
2561
def rfc3339_duration_to_delta(duration):
2562
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2563
2564
>>> rfc3339_duration_to_delta("P7D")
2565
datetime.timedelta(7)
2566
>>> rfc3339_duration_to_delta("PT60S")
2567
datetime.timedelta(0, 60)
2568
>>> rfc3339_duration_to_delta("PT60M")
2569
datetime.timedelta(0, 3600)
2570
>>> rfc3339_duration_to_delta("PT24H")
2571
datetime.timedelta(1)
2572
>>> rfc3339_duration_to_delta("P1W")
2573
datetime.timedelta(7)
2574
>>> rfc3339_duration_to_delta("PT5M30S")
2575
datetime.timedelta(0, 330)
2576
>>> rfc3339_duration_to_delta("P1DT3M20S")
2577
datetime.timedelta(1, 200)
2578
"""
2579
2580
# Parsing an RFC 3339 duration with regular expressions is not
2581
# possible - there would have to be multiple places for the same
2582
# values, like seconds. The current code, while more esoteric, is
2583
# cleaner without depending on a parsing library. If Python had a
2584
# built-in library for parsing we would use it, but we'd like to
2585
# avoid excessive use of external libraries.
2586
2587
# New type for defining tokens, syntax, and semantics all-in-one
2588
Token = collections.namedtuple("Token", (
2589
"regexp", # To match token; if "value" is not None, must have
2590
# a "group" containing digits
2591
"value", # datetime.timedelta or None
2592
"followers")) # Tokens valid after this token
2593
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2594
# the "duration" ABNF definition in RFC 3339, Appendix A.
2595
token_end = Token(re.compile(r"$"), None, frozenset())
2596
token_second = Token(re.compile(r"(\d+)S"),
2597
datetime.timedelta(seconds=1),
2598
frozenset((token_end, )))
2599
token_minute = Token(re.compile(r"(\d+)M"),
2600
datetime.timedelta(minutes=1),
2601
frozenset((token_second, token_end)))
2602
token_hour = Token(re.compile(r"(\d+)H"),
2603
datetime.timedelta(hours=1),
2604
frozenset((token_minute, token_end)))
2605
token_time = Token(re.compile(r"T"),
2606
None,
2607
frozenset((token_hour, token_minute,
2608
token_second)))
2609
token_day = Token(re.compile(r"(\d+)D"),
2610
datetime.timedelta(days=1),
2611
frozenset((token_time, token_end)))
2612
token_month = Token(re.compile(r"(\d+)M"),
2613
datetime.timedelta(weeks=4),
2614
frozenset((token_day, token_end)))
2615
token_year = Token(re.compile(r"(\d+)Y"),
2616
datetime.timedelta(weeks=52),
2617
frozenset((token_month, token_end)))
2618
token_week = Token(re.compile(r"(\d+)W"),
2619
datetime.timedelta(weeks=1),
2620
frozenset((token_end, )))
2621
token_duration = Token(re.compile(r"P"), None,
2622
frozenset((token_year, token_month,
2623
token_day, token_time,
2624
token_week)))
2625
# Define starting values
2626
value = datetime.timedelta() # Value so far
2627
found_token = None
2628
followers = frozenset((token_duration, )) # Following valid tokens
2629
s = duration # String left to parse
2630
# Loop until end token is found
2631
while found_token is not token_end:
2632
# Search for any currently valid tokens
2633
for token in followers:
2634
match = token.regexp.match(s)
2635
if match is not None:
2636
# Token found
2637
if token.value is not None:
2638
# Value found, parse digits
2639
factor = int(match.group(1), 10)
2640
# Add to value so far
2641
value += factor * token.value
2642
# Strip token from string
2643
s = token.regexp.sub("", s, 1)
2644
# Go to found token
2645
found_token = token
2646
# Set valid next tokens
2647
followers = found_token.followers
2648
break
2649
else:
2650
# No currently valid tokens were found
2651
raise ValueError("Invalid RFC 3339 duration: {!r}"
2652
.format(duration))
2653
# End token found
2654
return value
2655
2656
1582
2657
def string_to_delta(interval):
1583
2658
"""Parse a string and return a datetime.timedelta
1584
2659
1585
>>> string_to_delta(u'7d')
2660
>>> string_to_delta('7d')
1586
2661
datetime.timedelta(7)
1587
>>> string_to_delta(u'60s')
2662
>>> string_to_delta('60s')
1588
2663
datetime.timedelta(0, 60)
1589
>>> string_to_delta(u'60m')
2664
>>> string_to_delta('60m')
1590
2665
datetime.timedelta(0, 3600)
1591
>>> string_to_delta(u'24h')
2666
>>> string_to_delta('24h')
1592
2667
datetime.timedelta(1)
1593
>>> string_to_delta(u'1w')
2668
>>> string_to_delta('1w')
1594
2669
datetime.timedelta(7)
1595
>>> string_to_delta(u'5m 30s')
2670
>>> string_to_delta('5m 30s')
1596
2671
datetime.timedelta(0, 330)
1597
2672
"""
2673
2674
try:
2675
return rfc3339_duration_to_delta(interval)
2676
except ValueError:
2677
pass
2678
1598
2679
timevalue = datetime.timedelta(0)
1599
2680
for s in interval.split():
1600
2681
try:
1601
suffix = unicode(s[-1])
2682
suffix = s[-1]
1602
2683
value = int(s[:-1])
1603
if suffix == u"d":
2684
if suffix == "d":
1604
2685
delta = datetime.timedelta(value)
1605
elif suffix == u"s":
2686
elif suffix == "s":
1606
2687
delta = datetime.timedelta(0, value)
1607
elif suffix == u"m":
2688
elif suffix == "m":
1608
2689
delta = datetime.timedelta(0, 0, 0, 0, value)
1609
elif suffix == u"h":
2690
elif suffix == "h":
1610
2691
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1611
elif suffix == u"w":
2692
elif suffix == "w":
1612
2693
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1613
2694
else:
1614
raise ValueError(u"Unknown suffix %r" % suffix)
1615
except (ValueError, IndexError), e:
1616
raise ValueError(e.message)
2695
raise ValueError("Unknown suffix {!r}".format(suffix))
2696
except IndexError as e:
2697
raise ValueError(*(e.args))
1617
2698
timevalue += delta
1618
2699
return timevalue
1619
2700
1620
2701
1621
def if_nametoindex(interface):
1622
"""Call the C function if_nametoindex(), or equivalent
1623
1624
Note: This function cannot accept a unicode string."""
1625
global if_nametoindex
1626
try:
1627
if_nametoindex = (ctypes.cdll.LoadLibrary
1628
(ctypes.util.find_library(u"c"))
1629
.if_nametoindex)
1630
except (OSError, AttributeError):
1631
logger.warning(u"Doing if_nametoindex the hard way")
1632
def if_nametoindex(interface):
1633
"Get an interface index the hard way, i.e. using fcntl()"
1634
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1635
with contextlib.closing(socket.socket()) as s:
1636
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1637
struct.pack(str(u"16s16x"),
1638
interface))
1639
interface_index = struct.unpack(str(u"I"),
1640
ifreq[16:20])[0]
1641
return interface_index
1642
return if_nametoindex(interface)
1643
1644
1645
2702
def daemon(nochdir = False, noclose = False):
1646
2703
"""See daemon(3). Standard BSD Unix function.
1647
2704
1650
2707
sys.exit()
1651
2708
os.setsid()
1652
2709
if not nochdir:
1653
os.chdir(u"/")
2710
os.chdir("/")
1654
2711
if os.fork():
1655
2712
sys.exit()
1656
2713
if not noclose:
1657
2714
# Close all standard open file descriptors
1658
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2715
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
2716
if not stat.S_ISCHR(os.fstat(null).st_mode):
1660
2717
raise OSError(errno.ENODEV,
1661
u"%s not a character device"
1662
% os.path.devnull)
2718
"{} not a character device"
2719
.format(os.devnull))
1663
2720
os.dup2(null, sys.stdin.fileno())
1664
2721
os.dup2(null, sys.stdout.fileno())
1665
2722
os.dup2(null, sys.stderr.fileno())
1672
2729
##################################################################
1673
2730
# Parsing of options, both command line and config file
1674
2731
1675
parser = optparse.OptionParser(version = "%%prog %s" % version)
1676
parser.add_option("-i", u"--interface", type=u"string",
1677
metavar="IF", help=u"Bind to interface IF")
1678
parser.add_option("-a", u"--address", type=u"string",
1679
help=u"Address to listen for requests on")
1680
parser.add_option("-p", u"--port", type=u"int",
1681
help=u"Port number to receive requests on")
1682
parser.add_option("--check", action=u"store_true",
1683
help=u"Run self-test")
1684
parser.add_option("--debug", action=u"store_true",
1685
help=u"Debug mode; run in foreground and log to"
1686
u" terminal")
1687
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1688
help=u"Debug level for stdout output")
1689
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1690
u" priority string (see GnuTLS documentation)")
1691
parser.add_option("--servicename", type=u"string",
1692
metavar=u"NAME", help=u"Zeroconf service name")
1693
parser.add_option("--configdir", type=u"string",
1694
default=u"/etc/mandos", metavar=u"DIR",
1695
help=u"Directory to search for configuration"
1696
u" files")
1697
parser.add_option("--no-dbus", action=u"store_false",
1698
dest=u"use_dbus", help=u"Do not provide D-Bus"
1699
u" system bus interface")
1700
parser.add_option("--no-ipv6", action=u"store_false",
1701
dest=u"use_ipv6", help=u"Do not use IPv6")
1702
options = parser.parse_args()[0]
2732
parser = argparse.ArgumentParser()
2733
parser.add_argument("-v", "--version", action="version",
2734
version = "%(prog)s {}".format(version),
2735
help="show version number and exit")
2736
parser.add_argument("-i", "--interface", metavar="IF",
2737
help="Bind to interface IF")
2738
parser.add_argument("-a", "--address",
2739
help="Address to listen for requests on")
2740
parser.add_argument("-p", "--port", type=int,
2741
help="Port number to receive requests on")
2742
parser.add_argument("--check", action="store_true",
2743
help="Run self-test")
2744
parser.add_argument("--debug", action="store_true",
2745
help="Debug mode; run in foreground and log"
2746
" to terminal", default=None)
2747
parser.add_argument("--debuglevel", metavar="LEVEL",
2748
help="Debug level for stdout output")
2749
parser.add_argument("--priority", help="GnuTLS"
2750
" priority string (see GnuTLS documentation)")
2751
parser.add_argument("--servicename",
2752
metavar="NAME", help="Zeroconf service name")
2753
parser.add_argument("--configdir",
2754
default="/etc/mandos", metavar="DIR",
2755
help="Directory to search for configuration"
2756
" files")
2757
parser.add_argument("--no-dbus", action="store_false",
2758
dest="use_dbus", help="Do not provide D-Bus"
2759
" system bus interface", default=None)
2760
parser.add_argument("--no-ipv6", action="store_false",
2761
dest="use_ipv6", help="Do not use IPv6",
2762
default=None)
2763
parser.add_argument("--no-restore", action="store_false",
2764
dest="restore", help="Do not restore stored"
2765
" state", default=None)
2766
parser.add_argument("--socket", type=int,
2767
help="Specify a file descriptor to a network"
2768
" socket to use instead of creating one")
2769
parser.add_argument("--statedir", metavar="DIR",
2770
help="Directory to save/restore state in")
2771
parser.add_argument("--foreground", action="store_true",
2772
help="Run in foreground", default=None)
2773
parser.add_argument("--no-zeroconf", action="store_false",
2774
dest="zeroconf", help="Do not use Zeroconf",
2775
default=None)
2776
2777
options = parser.parse_args()
1703
2778
1704
2779
if options.check:
1705
2780
import doctest
1706
doctest.testmod()
1707
sys.exit()
2781
fail_count, test_count = doctest.testmod()
2782
sys.exit(os.EX_OK if fail_count == 0 else 1)
1708
2783
1709
2784
# Default values for config file for server-global settings
1710
server_defaults = { u"interface": u"",
1711
u"address": u"",
1712
u"port": u"",
1713
u"debug": u"False",
1714
u"priority":
1715
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1716
u"servicename": u"Mandos",
1717
u"use_dbus": u"True",
1718
u"use_ipv6": u"True",
1719
u"debuglevel": u"",
1720
}
2785
server_defaults = { "interface": "",
2786
"address": "",
2787
"port": "",
2788
"debug": "False",
2789
"priority":
2790
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2791
":+SIGN-DSA-SHA256",
2792
"servicename": "Mandos",
2793
"use_dbus": "True",
2794
"use_ipv6": "True",
2795
"debuglevel": "",
2796
"restore": "True",
2797
"socket": "",
2798
"statedir": "/var/lib/mandos",
2799
"foreground": "False",
2800
"zeroconf": "True",
2801
}
1721
2802
1722
2803
# Parse config file for server-global settings
1723
2804
server_config = configparser.SafeConfigParser(server_defaults)
1724
2805
del server_defaults
1725
server_config.read(os.path.join(options.configdir,
1726
u"mandos.conf"))
2806
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1727
2807
# Convert the SafeConfigParser object to a dict
1728
2808
server_settings = server_config.defaults()
1729
2809
# Use the appropriate methods on the non-string config options
1730
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1731
server_settings[option] = server_config.getboolean(u"DEFAULT",
2810
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2811
server_settings[option] = server_config.getboolean("DEFAULT",
1732
2812
option)
1733
2813
if server_settings["port"]:
1734
server_settings["port"] = server_config.getint(u"DEFAULT",
1735
u"port")
2814
server_settings["port"] = server_config.getint("DEFAULT",
2815
"port")
2816
if server_settings["socket"]:
2817
server_settings["socket"] = server_config.getint("DEFAULT",
2818
"socket")
2819
# Later, stdin will, and stdout and stderr might, be dup'ed
2820
# over with an opened os.devnull. But we don't want this to
2821
# happen with a supplied network socket.
2822
if 0 <= server_settings["socket"] <= 2:
2823
server_settings["socket"] = os.dup(server_settings
2824
["socket"])
1736
2825
del server_config
1737
2826
1738
2827
# Override the settings from the config file with command line
1739
2828
# options, if set.
1740
for option in (u"interface", u"address", u"port", u"debug",
1741
u"priority", u"servicename", u"configdir",
1742
u"use_dbus", u"use_ipv6", u"debuglevel"):
2829
for option in ("interface", "address", "port", "debug",
2830
"priority", "servicename", "configdir", "use_dbus",
2831
"use_ipv6", "debuglevel", "restore", "statedir",
2832
"socket", "foreground", "zeroconf"):
1743
2833
value = getattr(options, option)
1744
2834
if value is not None:
1745
2835
server_settings[option] = value
1746
2836
del options
1747
2837
# Force all strings to be unicode
1748
2838
for option in server_settings.keys():
1749
if type(server_settings[option]) is str:
1750
server_settings[option] = unicode(server_settings[option])
2839
if isinstance(server_settings[option], bytes):
2840
server_settings[option] = (server_settings[option]
2841
.decode("utf-8"))
2842
# Force all boolean options to be boolean
2843
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2844
"foreground", "zeroconf"):
2845
server_settings[option] = bool(server_settings[option])
2846
# Debug implies foreground
2847
if server_settings["debug"]:
2848
server_settings["foreground"] = True
1751
2849
# Now we have our good server settings in "server_settings"
1752
2850
1753
2851
##################################################################
1754
2852
2853
if (not server_settings["zeroconf"]
2854
and not (server_settings["port"]
2855
or server_settings["socket"] != "")):
2856
parser.error("Needs port or socket to work without Zeroconf")
2857
1755
2858
# For convenience
1756
debug = server_settings[u"debug"]
1757
debuglevel = server_settings[u"debuglevel"]
1758
use_dbus = server_settings[u"use_dbus"]
1759
use_ipv6 = server_settings[u"use_ipv6"]
1760
1761
if server_settings[u"servicename"] != u"Mandos":
1762
syslogger.setFormatter(logging.Formatter
1763
(u'Mandos (%s) [%%(process)d]:'
1764
u' %%(levelname)s: %%(message)s'
1765
% server_settings[u"servicename"]))
2859
debug = server_settings["debug"]
2860
debuglevel = server_settings["debuglevel"]
2861
use_dbus = server_settings["use_dbus"]
2862
use_ipv6 = server_settings["use_ipv6"]
2863
stored_state_path = os.path.join(server_settings["statedir"],
2864
stored_state_file)
2865
foreground = server_settings["foreground"]
2866
zeroconf = server_settings["zeroconf"]
2867
2868
if debug:
2869
initlogger(debug, logging.DEBUG)
2870
else:
2871
if not debuglevel:
2872
initlogger(debug)
2873
else:
2874
level = getattr(logging, debuglevel.upper())
2875
initlogger(debug, level)
2876
2877
if server_settings["servicename"] != "Mandos":
2878
syslogger.setFormatter(
2879
logging.Formatter('Mandos ({}) [%(process)d]:'
2880
' %(levelname)s: %(message)s'.format(
2881
server_settings["servicename"])))
1766
2882
1767
2883
# Parse config file with clients
1768
client_defaults = { u"timeout": u"1h",
1769
u"interval": u"5m",
1770
u"checker": u"fping -q -- %%(host)s",
1771
u"host": u"",
1772
u"approval_delay": u"0s",
1773
u"approval_duration": u"1s",
1774
}
1775
client_config = configparser.SafeConfigParser(client_defaults)
1776
client_config.read(os.path.join(server_settings[u"configdir"],
1777
u"clients.conf"))
2884
client_config = configparser.SafeConfigParser(Client
2885
.client_defaults)
2886
client_config.read(os.path.join(server_settings["configdir"],
2887
"clients.conf"))
1778
2888
1779
2889
global mandos_dbus_service
1780
2890
mandos_dbus_service = None
1781
2891
1782
tcp_server = MandosServer((server_settings[u"address"],
1783
server_settings[u"port"]),
1784
ClientHandler,
1785
interface=(server_settings[u"interface"]
1786
or None),
1787
use_ipv6=use_ipv6,
1788
gnutls_priority=
1789
server_settings[u"priority"],
1790
use_dbus=use_dbus)
1791
if not debug:
1792
pidfilename = u"/var/run/mandos.pid"
2892
socketfd = None
2893
if server_settings["socket"] != "":
2894
socketfd = server_settings["socket"]
2895
tcp_server = MandosServer(
2896
(server_settings["address"], server_settings["port"]),
2897
ClientHandler,
2898
interface=(server_settings["interface"] or None),
2899
use_ipv6=use_ipv6,
2900
gnutls_priority=server_settings["priority"],
2901
use_dbus=use_dbus,
2902
socketfd=socketfd)
2903
if not foreground:
2904
pidfilename = "/run/mandos.pid"
2905
if not os.path.isdir("/run/."):
2906
pidfilename = "/var/run/mandos.pid"
2907
pidfile = None
1793
2908
try:
1794
pidfile = open(pidfilename, u"w")
1795
except IOError:
1796
logger.error(u"Could not open file %r", pidfilename)
2909
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2910
except IOError as e:
2911
logger.error("Could not open file %r", pidfilename,
2912
exc_info=e)
1797
2913
1798
try:
1799
uid = pwd.getpwnam(u"_mandos").pw_uid
1800
gid = pwd.getpwnam(u"_mandos").pw_gid
1801
except KeyError:
2914
for name in ("_mandos", "mandos", "nobody"):
1802
2915
try:
1803
uid = pwd.getpwnam(u"mandos").pw_uid
1804
gid = pwd.getpwnam(u"mandos").pw_gid
2916
uid = pwd.getpwnam(name).pw_uid
2917
gid = pwd.getpwnam(name).pw_gid
2918
break
1805
2919
except KeyError:
1806
try:
1807
uid = pwd.getpwnam(u"nobody").pw_uid
1808
gid = pwd.getpwnam(u"nobody").pw_gid
1809
except KeyError:
1810
uid = 65534
1811
gid = 65534
2920
continue
2921
else:
2922
uid = 65534
2923
gid = 65534
1812
2924
try:
1813
2925
os.setgid(gid)
1814
2926
os.setuid(uid)
1815
except OSError, error:
1816
if error[0] != errno.EPERM:
1817
raise error
2927
except OSError as error:
2928
if error.errno != errno.EPERM:
2929
raise
1818
2930
1819
if not debug and not debuglevel:
1820
syslogger.setLevel(logging.WARNING)
1821
console.setLevel(logging.WARNING)
1822
if debuglevel:
1823
level = getattr(logging, debuglevel.upper())
1824
syslogger.setLevel(level)
1825
console.setLevel(level)
1826
1827
2931
if debug:
1828
2932
# Enable all possible GnuTLS debugging
1829
2933
1830
2934
# "Use a log level over 10 to enable all debugging options."
1831
2935
# - GnuTLS manual
1832
gnutls.library.functions.gnutls_global_set_log_level(11)
2936
gnutls.global_set_log_level(11)
1833
2937
1834
@gnutls.library.types.gnutls_log_func
2938
@gnutls.log_func
1835
2939
def debug_gnutls(level, string):
1836
logger.debug(u"GnuTLS: %s", string[:-1])
2940
logger.debug("GnuTLS: %s", string[:-1])
1837
2941
1838
(gnutls.library.functions
1839
.gnutls_global_set_log_function(debug_gnutls))
2942
gnutls.global_set_log_function(debug_gnutls)
1840
2943
1841
2944
# Redirect stdin so all checkers get /dev/null
1842
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2945
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
2946
os.dup2(null, sys.stdin.fileno())
1844
2947
if null > 2:
1845
2948
os.close(null)
1846
else:
1847
# No console logging
1848
logger.removeHandler(console)
1849
2949
2950
# Need to fork before connecting to D-Bus
2951
if not foreground:
2952
# Close all input and output, do double fork, etc.
2953
daemon()
2954
2955
# multiprocessing will use threads, so before we use gobject we
2956
# need to inform gobject that threads will be used.
2957
gobject.threads_init()
1850
2958
1851
2959
global main_loop
1852
2960
# From the Avahi example code
1853
DBusGMainLoop(set_as_default=True )
2961
DBusGMainLoop(set_as_default=True)
1854
2962
main_loop = gobject.MainLoop()
1855
2963
bus = dbus.SystemBus()
1856
2964
# End of Avahi example code
1857
2965
if use_dbus:
1858
2966
try:
1859
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1860
bus, do_not_queue=True)
1861
except dbus.exceptions.NameExistsException, e:
1862
logger.error(unicode(e) + u", disabling D-Bus")
2967
bus_name = dbus.service.BusName("se.recompile.Mandos",
2968
bus,
2969
do_not_queue=True)
2970
old_bus_name = dbus.service.BusName(
2971
"se.bsnet.fukt.Mandos", bus,
2972
do_not_queue=True)
2973
except dbus.exceptions.DBusException as e:
2974
logger.error("Disabling D-Bus:", exc_info=e)
1863
2975
use_dbus = False
1864
server_settings[u"use_dbus"] = False
2976
server_settings["use_dbus"] = False
1865
2977
tcp_server.use_dbus = False
1866
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1867
service = AvahiService(name = server_settings[u"servicename"],
1868
servicetype = u"_mandos._tcp",
1869
protocol = protocol, bus = bus)
1870
if server_settings["interface"]:
1871
service.interface = (if_nametoindex
1872
(str(server_settings[u"interface"])))
1873
1874
if not debug:
1875
# Close all input and output, do double fork, etc.
1876
daemon()
1877
2978
if zeroconf:
2979
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2980
service = AvahiServiceToSyslog(
2981
name = server_settings["servicename"],
2982
servicetype = "_mandos._tcp",
2983
protocol = protocol,
2984
bus = bus)
2985
if server_settings["interface"]:
2986
service.interface = if_nametoindex(
2987
server_settings["interface"].encode("utf-8"))
2988
1878
2989
global multiprocessing_manager
1879
2990
multiprocessing_manager = multiprocessing.Manager()
1880
2991
1881
2992
client_class = Client
1882
2993
if use_dbus:
1883
2994
client_class = functools.partial(ClientDBus, bus = bus)
1884
def client_config_items(config, section):
1885
special_settings = {
1886
"approved_by_default":
1887
lambda: config.getboolean(section,
1888
"approved_by_default"),
1889
}
1890
for name, value in config.items(section):
2995
2996
client_settings = Client.config_parser(client_config)
2997
old_client_settings = {}
2998
clients_data = {}
2999
3000
# This is used to redirect stdout and stderr for checker processes
3001
global wnull
3002
wnull = open(os.devnull, "w") # A writable /dev/null
3003
# Only used if server is running in foreground but not in debug
3004
# mode
3005
if debug or not foreground:
3006
wnull.close()
3007
3008
# Get client data and settings from last running state.
3009
if server_settings["restore"]:
3010
try:
3011
with open(stored_state_path, "rb") as stored_state:
3012
clients_data, old_client_settings = pickle.load(
3013
stored_state)
3014
os.remove(stored_state_path)
3015
except IOError as e:
3016
if e.errno == errno.ENOENT:
3017
logger.warning("Could not load persistent state:"
3018
" {}".format(os.strerror(e.errno)))
3019
else:
3020
logger.critical("Could not load persistent state:",
3021
exc_info=e)
3022
raise
3023
except EOFError as e:
3024
logger.warning("Could not load persistent state: "
3025
"EOFError:",
3026
exc_info=e)
3027
3028
with PGPEngine() as pgp:
3029
for client_name, client in clients_data.items():
3030
# Skip removed clients
3031
if client_name not in client_settings:
3032
continue
3033
3034
# Decide which value to use after restoring saved state.
3035
# We have three different values: Old config file,
3036
# new config file, and saved state.
3037
# New config value takes precedence if it differs from old
3038
# config value, otherwise use saved state.
3039
for name, value in client_settings[client_name].items():
3040
try:
3041
# For each value in new config, check if it
3042
# differs from the old config value (Except for
3043
# the "secret" attribute)
3044
if (name != "secret"
3045
and (value !=
3046
old_client_settings[client_name][name])):
3047
client[name] = value
3048
except KeyError:
3049
pass
3050
3051
# Clients who has passed its expire date can still be
3052
# enabled if its last checker was successful. A Client
3053
# whose checker succeeded before we stored its state is
3054
# assumed to have successfully run all checkers during
3055
# downtime.
3056
if client["enabled"]:
3057
if datetime.datetime.utcnow() >= client["expires"]:
3058
if not client["last_checked_ok"]:
3059
logger.warning(
3060
"disabling client {} - Client never "
3061
"performed a successful checker".format(
3062
client_name))
3063
client["enabled"] = False
3064
elif client["last_checker_status"] != 0:
3065
logger.warning(
3066
"disabling client {} - Client last"
3067
" checker failed with error code"
3068
" {}".format(
3069
client_name,
3070
client["last_checker_status"]))
3071
client["enabled"] = False
3072
else:
3073
client["expires"] = (
3074
datetime.datetime.utcnow()
3075
+ client["timeout"])
3076
logger.debug("Last checker succeeded,"
3077
" keeping {} enabled".format(
3078
client_name))
1891
3079
try:
1892
yield (name, special_settings[name]())
1893
except KeyError:
1894
yield (name, value)
1895
1896
tcp_server.clients.update(set(
1897
client_class(name = section,
1898
config= dict(client_config_items(
1899
client_config, section)))
1900
for section in client_config.sections()))
3080
client["secret"] = pgp.decrypt(
3081
client["encrypted_secret"],
3082
client_settings[client_name]["secret"])
3083
except PGPError:
3084
# If decryption fails, we use secret from new settings
3085
logger.debug("Failed to decrypt {} old secret".format(
3086
client_name))
3087
client["secret"] = (client_settings[client_name]
3088
["secret"])
3089
3090
# Add/remove clients based on new changes made to config
3091
for client_name in (set(old_client_settings)
3092
- set(client_settings)):
3093
del clients_data[client_name]
3094
for client_name in (set(client_settings)
3095
- set(old_client_settings)):
3096
clients_data[client_name] = client_settings[client_name]
3097
3098
# Create all client objects
3099
for client_name, client in clients_data.items():
3100
tcp_server.clients[client_name] = client_class(
3101
name = client_name,
3102
settings = client,
3103
server_settings = server_settings)
3104
1901
3105
if not tcp_server.clients:
1902
logger.warning(u"No clients defined")
1903
1904
if not debug:
1905
try:
1906
with pidfile:
1907
pid = os.getpid()
1908
pidfile.write(str(pid) + "\n")
1909
del pidfile
1910
except IOError:
1911
logger.error(u"Could not write to file %r with PID %d",
1912
pidfilename, pid)
1913
except NameError:
1914
# "pidfile" was never created
1915
pass
3106
logger.warning("No clients defined")
3107
3108
if not foreground:
3109
if pidfile is not None:
3110
pid = os.getpid()
3111
try:
3112
with pidfile:
3113
print(pid, file=pidfile)
3114
except IOError:
3115
logger.error("Could not write to file %r with PID %d",
3116
pidfilename, pid)
3117
del pidfile
1916
3118
del pidfilename
1917
1918
signal.signal(signal.SIGINT, signal.SIG_IGN)
1919
3119
1920
3120
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1921
3121
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1922
3122
1923
3123
if use_dbus:
1924
class MandosDBusService(dbus.service.Object):
3124
3125
@alternate_dbus_interfaces(
3126
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3127
class MandosDBusService(DBusObjectWithObjectManager):
1925
3128
"""A D-Bus proxy object"""
3129
1926
3130
def __init__(self):
1927
dbus.service.Object.__init__(self, bus, u"/")
1928
_interface = u"se.bsnet.fukt.Mandos"
1929
1930
@dbus.service.signal(_interface, signature=u"o")
3131
dbus.service.Object.__init__(self, bus, "/")
3132
3133
_interface = "se.recompile.Mandos"
3134
3135
@dbus.service.signal(_interface, signature="o")
1931
3136
def ClientAdded(self, objpath):
1932
3137
"D-Bus signal"
1933
3138
pass
1934
3139
1935
@dbus.service.signal(_interface, signature=u"ss")
3140
@dbus.service.signal(_interface, signature="ss")
1936
3141
def ClientNotFound(self, fingerprint, address):
1937
3142
"D-Bus signal"
1938
3143
pass
1939
3144
1940
@dbus.service.signal(_interface, signature=u"os")
3145
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3146
"true"})
3147
@dbus.service.signal(_interface, signature="os")
1941
3148
def ClientRemoved(self, objpath, name):
1942
3149
"D-Bus signal"
1943
3150
pass
1944
3151
1945
@dbus.service.method(_interface, out_signature=u"ao")
3152
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3153
"true"})
3154
@dbus.service.method(_interface, out_signature="ao")
1946
3155
def GetAllClients(self):
1947
3156
"D-Bus method"
1948
return dbus.Array(c.dbus_object_path
1949
for c in tcp_server.clients)
3157
return dbus.Array(c.dbus_object_path for c in
3158
tcp_server.clients.itervalues())
1950
3159
3160
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3161
"true"})
1951
3162
@dbus.service.method(_interface,
1952
out_signature=u"a{oa{sv}}")
3163
out_signature="a{oa{sv}}")
1953
3164
def GetAllClientsWithProperties(self):
1954
3165
"D-Bus method"
1955
3166
return dbus.Dictionary(
1956
((c.dbus_object_path, c.GetAll(u""))
1957
for c in tcp_server.clients),
1958
signature=u"oa{sv}")
3167
{ c.dbus_object_path: c.GetAll(
3168
"se.recompile.Mandos.Client")
3169
for c in tcp_server.clients.itervalues() },
3170
signature="oa{sv}")
1959
3171
1960
@dbus.service.method(_interface, in_signature=u"o")
3172
@dbus.service.method(_interface, in_signature="o")
1961
3173
def RemoveClient(self, object_path):
1962
3174
"D-Bus method"
1963
for c in tcp_server.clients:
3175
for c in tcp_server.clients.itervalues():
1964
3176
if c.dbus_object_path == object_path:
1965
tcp_server.clients.remove(c)
3177
del tcp_server.clients[c.name]
1966
3178
c.remove_from_connection()
1967
# Don't signal anything except ClientRemoved
3179
# Don't signal the disabling
1968
3180
c.disable(quiet=True)
1969
# Emit D-Bus signal
1970
self.ClientRemoved(object_path, c.name)
3181
# Emit D-Bus signal for removal
3182
self.client_removed_signal(c)
1971
3183
return
1972
3184
raise KeyError(object_path)
1973
3185
1974
3186
del _interface
3187
3188
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3189
out_signature = "a{oa{sa{sv}}}")
3190
def GetManagedObjects(self):
3191
"""D-Bus method"""
3192
return dbus.Dictionary(
3193
{ client.dbus_object_path:
3194
dbus.Dictionary(
3195
{ interface: client.GetAll(interface)
3196
for interface in
3197
client._get_all_interface_names()})
3198
for client in tcp_server.clients.values()})
3199
3200
def client_added_signal(self, client):
3201
"""Send the new standard signal and the old signal"""
3202
if use_dbus:
3203
# New standard signal
3204
self.InterfacesAdded(
3205
client.dbus_object_path,
3206
dbus.Dictionary(
3207
{ interface: client.GetAll(interface)
3208
for interface in
3209
client._get_all_interface_names()}))
3210
# Old signal
3211
self.ClientAdded(client.dbus_object_path)
3212
3213
def client_removed_signal(self, client):
3214
"""Send the new standard signal and the old signal"""
3215
if use_dbus:
3216
# New standard signal
3217
self.InterfacesRemoved(
3218
client.dbus_object_path,
3219
client._get_all_interface_names())
3220
# Old signal
3221
self.ClientRemoved(client.dbus_object_path,
3222
client.name)
1975
3223
1976
3224
mandos_dbus_service = MandosDBusService()
1977
3225
1978
3226
def cleanup():
1979
3227
"Cleanup function; run on exit"
1980
service.cleanup()
1981
3228
if zeroconf:
3229
service.cleanup()
3230
3231
multiprocessing.active_children()
3232
wnull.close()
3233
if not (tcp_server.clients or client_settings):
3234
return
3235
3236
# Store client before exiting. Secrets are encrypted with key
3237
# based on what config file has. If config file is
3238
# removed/edited, old secret will thus be unrecovable.
3239
clients = {}
3240
with PGPEngine() as pgp:
3241
for client in tcp_server.clients.itervalues():
3242
key = client_settings[client.name]["secret"]
3243
client.encrypted_secret = pgp.encrypt(client.secret,
3244
key)
3245
client_dict = {}
3246
3247
# A list of attributes that can not be pickled
3248
# + secret.
3249
exclude = { "bus", "changedstate", "secret",
3250
"checker", "server_settings" }
3251
for name, typ in inspect.getmembers(dbus.service
3252
.Object):
3253
exclude.add(name)
3254
3255
client_dict["encrypted_secret"] = (client
3256
.encrypted_secret)
3257
for attr in client.client_structure:
3258
if attr not in exclude:
3259
client_dict[attr] = getattr(client, attr)
3260
3261
clients[client.name] = client_dict
3262
del client_settings[client.name]["secret"]
3263
3264
try:
3265
with tempfile.NamedTemporaryFile(
3266
mode='wb',
3267
suffix=".pickle",
3268
prefix='clients-',
3269
dir=os.path.dirname(stored_state_path),
3270
delete=False) as stored_state:
3271
pickle.dump((clients, client_settings), stored_state)
3272
tempname = stored_state.name
3273
os.rename(tempname, stored_state_path)
3274
except (IOError, OSError) as e:
3275
if not debug:
3276
try:
3277
os.remove(tempname)
3278
except NameError:
3279
pass
3280
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3281
logger.warning("Could not save persistent state: {}"
3282
.format(os.strerror(e.errno)))
3283
else:
3284
logger.warning("Could not save persistent state:",
3285
exc_info=e)
3286
raise
3287
3288
# Delete all clients, and settings from config
1982
3289
while tcp_server.clients:
1983
client = tcp_server.clients.pop()
3290
name, client = tcp_server.clients.popitem()
1984
3291
if use_dbus:
1985
3292
client.remove_from_connection()
1986
client.disable_hook = None
1987
# Don't signal anything except ClientRemoved
3293
# Don't signal the disabling
1988
3294
client.disable(quiet=True)
3295
# Emit D-Bus signal for removal
1989
3296
if use_dbus:
1990
# Emit D-Bus signal
1991
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1992
client.name)
3297
mandos_dbus_service.client_removed_signal(client)
3298
client_settings.clear()
1993
3299
1994
3300
atexit.register(cleanup)
1995
3301
1996
for client in tcp_server.clients:
3302
for client in tcp_server.clients.itervalues():
1997
3303
if use_dbus:
1998
# Emit D-Bus signal
1999
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2000
client.enable()
3304
# Emit D-Bus signal for adding
3305
mandos_dbus_service.client_added_signal(client)
3306
# Need to initiate checking of clients
3307
if client.enabled:
3308
client.init_checker()
2001
3309
2002
3310
tcp_server.enable()
2003
3311
tcp_server.server_activate()
2004
3312
2005
3313
# Find out what port we got
2006
service.port = tcp_server.socket.getsockname()[1]
3314
if zeroconf:
3315
service.port = tcp_server.socket.getsockname()[1]
2007
3316
if use_ipv6:
2008
logger.info(u"Now listening on address %r, port %d,"
2009
" flowinfo %d, scope_id %d"
2010
% tcp_server.socket.getsockname())
3317
logger.info("Now listening on address %r, port %d,"
3318
" flowinfo %d, scope_id %d",
3319
*tcp_server.socket.getsockname())
2011
3320
else: # IPv4
2012
logger.info(u"Now listening on address %r, port %d"
2013
% tcp_server.socket.getsockname())
3321
logger.info("Now listening on address %r, port %d",
3322
*tcp_server.socket.getsockname())
2014
3323
2015
3324
#service.interface = tcp_server.socket.getsockname()[3]
2016
3325
2017
3326
try:
2018
# From the Avahi example code
2019
try:
2020
service.activate()
2021
except dbus.exceptions.DBusException, error:
2022
logger.critical(u"DBusException: %s", error)
2023
cleanup()
2024
sys.exit(1)
2025
# End of Avahi example code
3327
if zeroconf:
3328
# From the Avahi example code
3329
try:
3330
service.activate()
3331
except dbus.exceptions.DBusException as error:
3332
logger.critical("D-Bus Exception", exc_info=error)
3333
cleanup()
3334
sys.exit(1)
3335
# End of Avahi example code
2026
3336
2027
3337
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2028
3338
lambda *args, **kwargs:
2029
3339
(tcp_server.handle_request
2030
3340
(*args[2:], **kwargs) or True))
2031
3341
2032
logger.debug(u"Starting main loop")
3342
logger.debug("Starting main loop")
2033
3343
main_loop.run()
2034
except AvahiError, error:
2035
logger.critical(u"AvahiError: %s", error)
3344
except AvahiError as error:
3345
logger.critical("Avahi Error", exc_info=error)
2036
3346
cleanup()
2037
3347
sys.exit(1)
2038
3348
except KeyboardInterrupt:
2039
3349
if debug:
2040
print >> sys.stderr
2041
logger.debug(u"Server received KeyboardInterrupt")
2042
logger.debug(u"Server exiting")
3350
print("", file=sys.stderr)
3351
logger.debug("Server received KeyboardInterrupt")
3352
logger.debug("Server exiting")
2043
3353
# Must run before the D-Bus bus name gets deregistered
2044
3354
cleanup()
2045
3355
3356
2046
3357
if __name__ == '__main__':
2047
3358
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0