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- Committer: Björn Påhlsson
- Date: 2010-09-12 18:23:40 UTC
- mfrom: (426 mandos)
- mto: (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 428.
- Revision ID: belorn@fukt.bsnet.se-20100912182340-09gzhdzd2a4zde5y
merge
- files removed:
- bugs.xml
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 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@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
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
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
43
37
import socket
44
import argparse
38
import optparse
45
39
import datetime
46
40
import errno
47
try:
48
import ConfigParser as configparser
49
except ImportError:
50
import configparser
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
51
48
import sys
52
49
import re
53
50
import os
62
59
import struct
63
60
import fcntl
64
61
import functools
65
try:
66
import cPickle as pickle
67
except ImportError:
68
import pickle
62
import cPickle as pickle
69
63
import multiprocessing
70
import types
71
import binascii
72
import tempfile
73
import itertools
74
import collections
75
import codecs
76
64
77
65
import dbus
78
66
import dbus.service
79
try:
80
from gi.repository import GObject
81
except ImportError:
82
import gobject as GObject
67
import gobject
83
68
import avahi
84
69
from dbus.mainloop.glib import DBusGMainLoop
85
70
import ctypes
95
80
except ImportError:
96
81
SO_BINDTODEVICE = None
97
82
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.3"
102
stored_state_file = "clients.pickle"
103
104
logger = logging.getLogger()
105
syslogger = None
106
107
try:
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
110
except (OSError, AttributeError):
111
112
def if_nametoindex(interface):
113
"Get an interface index the hard way, i.e. using fcntl()"
114
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
115
with contextlib.closing(socket.socket()) as s:
116
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
119
return interface_index
120
121
122
def initlogger(debug, level=logging.WARNING):
123
"""init logger and add loglevel"""
124
125
global syslogger
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
129
syslogger.setFormatter(logging.Formatter
130
('Mandos [%(process)d]: %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(syslogger)
133
134
if debug:
135
console = logging.StreamHandler()
136
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
137
' [%(process)d]:'
138
' %(levelname)s:'
139
' %(message)s'))
140
logger.addHandler(console)
141
logger.setLevel(level)
142
143
144
class PGPError(Exception):
145
"""Exception if encryption/decryption fails"""
146
pass
147
148
149
class PGPEngine(object):
150
"""A simple class for OpenPGP symmetric encryption & decryption"""
151
152
def __init__(self):
153
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
154
self.gpg = "gpg"
155
try:
156
output = subprocess.check_output(["gpgconf"])
157
for line in output.splitlines():
158
name, text, path = line.split(":")
159
if name == "gpg":
160
self.gpg = path
161
break
162
except OSError as e:
163
if e.errno != errno.ENOENT:
164
raise
165
self.gnupgargs = ['--batch',
166
'--homedir', self.tempdir,
167
'--force-mdc',
168
'--quiet',
169
'--no-use-agent']
170
171
def __enter__(self):
172
return self
173
174
def __exit__(self, exc_type, exc_value, traceback):
175
self._cleanup()
176
return False
177
178
def __del__(self):
179
self._cleanup()
180
181
def _cleanup(self):
182
if self.tempdir is not None:
183
# Delete contents of tempdir
184
for root, dirs, files in os.walk(self.tempdir,
185
topdown = False):
186
for filename in files:
187
os.remove(os.path.join(root, filename))
188
for dirname in dirs:
189
os.rmdir(os.path.join(root, dirname))
190
# Remove tempdir
191
os.rmdir(self.tempdir)
192
self.tempdir = None
193
194
def password_encode(self, password):
195
# Passphrase can not be empty and can not contain newlines or
196
# NUL bytes. So we prefix it and hex encode it.
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
203
return encoded
204
205
def encrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen([self.gpg, '--symmetric',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return ciphertext
222
223
def decrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
228
passfile.flush()
229
proc = subprocess.Popen([self.gpg, '--decrypt',
230
'--passphrase-file',
231
passfile.name]
232
+ self.gnupgargs,
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
238
raise PGPError(err)
239
return decrypted_plaintext
240
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)
241
101
242
102
class AvahiError(Exception):
243
103
def __init__(self, value, *args, **kwargs):
244
104
self.value = value
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
248
108
249
109
class AvahiServiceError(AvahiError):
250
110
pass
251
111
252
253
112
class AvahiGroupError(AvahiError):
254
113
pass
255
114
260
119
Attributes:
261
120
interface: integer; avahi.IF_UNSPEC or an interface index.
262
121
Used to optionally bind to the specified interface.
263
name: string; Example: 'Mandos'
264
type: string; Example: '_mandos._tcp'.
265
See <https://www.iana.org/assignments/service-names-port-numbers>
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
124
See <http://www.dns-sd.org/ServiceTypes.html>
266
125
port: integer; what port to announce
267
126
TXT: list of strings; TXT record for the service
268
127
domain: string; Domain to publish on, default to .local if empty.
274
133
server: D-Bus Server
275
134
bus: dbus.SystemBus()
276
135
"""
277
278
def __init__(self,
279
interface = avahi.IF_UNSPEC,
280
name = None,
281
servicetype = None,
282
port = None,
283
TXT = None,
284
domain = "",
285
host = "",
286
max_renames = 32768,
287
protocol = avahi.PROTO_UNSPEC,
288
bus = None):
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):
289
140
self.interface = interface
290
141
self.name = name
291
142
self.type = servicetype
299
150
self.group = None # our entry group
300
151
self.server = None
301
152
self.bus = bus
302
self.entry_group_state_changed_match = None
303
304
def rename(self, remove=True):
153
def rename(self):
305
154
"""Derived from the Avahi example code"""
306
155
if self.rename_count >= self.max_renames:
307
logger.critical("No suitable Zeroconf service name found"
308
" after %i retries, exiting.",
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
309
158
self.rename_count)
310
raise AvahiServiceError("Too many renames")
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
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 ...",
162
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()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
313
174
self.rename_count += 1
314
logger.info("Changing Zeroconf service name to %r ...",
315
self.name)
316
if remove:
317
self.remove()
318
try:
319
self.add()
320
except dbus.exceptions.DBusException as error:
321
if (error.get_dbus_name()
322
== "org.freedesktop.Avahi.CollisionError"):
323
logger.info("Local Zeroconf service name collision.")
324
return self.rename(remove=False)
325
else:
326
logger.critical("D-Bus Exception", exc_info=error)
327
self.cleanup()
328
os._exit(1)
329
330
175
def remove(self):
331
176
"""Derived from the Avahi example code"""
332
if self.entry_group_state_changed_match is not None:
333
self.entry_group_state_changed_match.remove()
334
self.entry_group_state_changed_match = None
335
177
if self.group is not None:
336
178
self.group.Reset()
337
338
179
def add(self):
339
180
"""Derived from the Avahi example code"""
340
self.remove()
341
181
if self.group is None:
342
182
self.group = dbus.Interface(
343
183
self.bus.get_object(avahi.DBUS_NAME,
344
184
self.server.EntryGroupNew()),
345
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
346
self.entry_group_state_changed_match = (
347
self.group.connect_to_signal(
348
'StateChanged', self.entry_group_state_changed))
349
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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' ...",
350
190
self.name, self.type)
351
191
self.group.AddService(
352
192
self.interface,
357
197
dbus.UInt16(self.port),
358
198
avahi.string_array_to_txt_array(self.TXT))
359
199
self.group.Commit()
360
361
200
def entry_group_state_changed(self, state, error):
362
201
"""Derived from the Avahi example code"""
363
logger.debug("Avahi entry group state change: %i", state)
202
logger.debug(u"Avahi entry group state change: %i", state)
364
203
365
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
366
logger.debug("Zeroconf service established.")
205
logger.debug(u"Zeroconf service established.")
367
206
elif state == avahi.ENTRY_GROUP_COLLISION:
368
logger.info("Zeroconf service name collision.")
207
logger.warning(u"Zeroconf service name collision.")
369
208
self.rename()
370
209
elif state == avahi.ENTRY_GROUP_FAILURE:
371
logger.critical("Avahi: Error in group state changed %s",
372
str(error))
373
raise AvahiGroupError("State changed: {!s}".format(error))
374
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
375
214
def cleanup(self):
376
215
"""Derived from the Avahi example code"""
377
216
if self.group is not None:
378
try:
379
self.group.Free()
380
except (dbus.exceptions.UnknownMethodException,
381
dbus.exceptions.DBusException):
382
pass
217
self.group.Free()
383
218
self.group = None
384
self.remove()
385
386
def server_state_changed(self, state, error=None):
219
def server_state_changed(self, state):
387
220
"""Derived from the Avahi example code"""
388
logger.debug("Avahi server state change: %i", state)
389
bad_states = {
390
avahi.SERVER_INVALID: "Zeroconf server invalid",
391
avahi.SERVER_REGISTERING: None,
392
avahi.SERVER_COLLISION: "Zeroconf server name collision",
393
avahi.SERVER_FAILURE: "Zeroconf server failure",
394
}
395
if state in bad_states:
396
if bad_states[state] is not None:
397
if error is None:
398
logger.error(bad_states[state])
399
else:
400
logger.error(bad_states[state] + ": %r", error)
401
self.cleanup()
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()
402
225
elif state == avahi.SERVER_RUNNING:
403
try:
404
self.add()
405
except dbus.exceptions.DBusException as error:
406
if (error.get_dbus_name()
407
== "org.freedesktop.Avahi.CollisionError"):
408
logger.info("Local Zeroconf service name"
409
" collision.")
410
return self.rename(remove=False)
411
else:
412
logger.critical("D-Bus Exception", exc_info=error)
413
self.cleanup()
414
os._exit(1)
415
else:
416
if error is None:
417
logger.debug("Unknown state: %r", state)
418
else:
419
logger.debug("Unknown state: %r: %r", state, error)
420
226
self.add()
421
227
def activate(self):
422
228
"""Derived from the Avahi example code"""
423
229
if self.server is None:
424
230
self.server = dbus.Interface(
425
231
self.bus.get_object(avahi.DBUS_NAME,
426
avahi.DBUS_PATH_SERVER,
427
follow_name_owner_changes=True),
232
avahi.DBUS_PATH_SERVER),
428
233
avahi.DBUS_INTERFACE_SERVER)
429
self.server.connect_to_signal("StateChanged",
430
self.server_state_changed)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
431
236
self.server_state_changed(self.server.GetState())
432
237
433
238
434
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
436
"""Add the new name to the syslog messages"""
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
440
.format(self.name)))
441
return ret
442
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
447
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
451
def __init__(self):
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
454
# happens.
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
458
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
461
462
# Constants
463
E_SUCCESS = 0
464
E_INTERRUPTED = -52
465
E_AGAIN = -28
466
CRT_OPENPGP = 2
467
CLIENT = 2
468
SHUT_RDWR = 0
469
CRD_CERTIFICATE = 1
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
472
473
# Types
474
class session_int(ctypes.Structure):
475
_fields_ = []
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
478
_fields_ = []
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
486
_fields_ = []
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int #
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
493
494
# Exceptions
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
503
# gnutls.strerror()
504
self.code = code
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
508
message, *args)
509
510
class CertificateSecurityError(Error):
511
pass
512
513
# Classes
514
class Credentials(object):
515
def __init__(self):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
520
521
def __del__(self):
522
gnutls.certificate_free_credentials(self._c_object)
523
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
531
True)
532
self.socket = socket
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
537
ctypes.c_void_p))
538
self.credentials = credentials
539
540
def __del__(self):
541
gnutls.deinit(self._c_object)
542
543
def handshake(self):
544
return gnutls.handshake(self._c_object)
545
546
def send(self, data):
547
data = bytes(data)
548
data_len = len(data)
549
while data_len > 0:
550
data_len -= gnutls.record_send(self._c_object,
551
data[-data_len:],
552
data_len)
553
554
def bye(self):
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
556
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
561
if result >= 0:
562
return result
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
566
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
570
while result < 0:
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
574
return result
575
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
578
579
# Functions
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
584
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
588
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
592
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
595
ctypes.c_size_t]
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
598
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
604
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
609
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
613
ctypes.c_int]
614
handshake_set_private_extensions.restype = None
615
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
618
ctypes.c_void_p]
619
credentials_set.restype = _error_code
620
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
624
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
628
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
633
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
637
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
641
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
645
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
650
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
654
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
659
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
663
664
# All the function declarations below are from gnutls/openpgp.h
665
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
669
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
673
openpgp_crt_fmt_t]
674
openpgp_crt_import.restype = _error_code
675
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
680
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
684
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
688
ctypes.c_void_p,
689
ctypes.POINTER(
690
ctypes.c_size_t)]
691
openpgp_crt_get_fingerprint.restype = _error_code
692
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
696
gnutls = GnuTLS()
697
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
701
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
704
"""
705
connection.send(func(*args, **kwargs))
706
connection.close()
707
708
239
class Client(object):
709
240
"""A representation of a client host served by this server.
710
241
711
242
Attributes:
712
approved: bool(); 'None' if not yet approved/disapproved
713
approval_delay: datetime.timedelta(); Time to wait for approval
714
approval_duration: datetime.timedelta(); Duration of one approval
243
name: string; from the config file, used in log messages and
244
D-Bus identifiers
245
fingerprint: string (40 or 32 hexadecimal digits); used to
246
uniquely identify the client
247
secret: bytestring; sent verbatim (over TLS) to client
248
host: string; available for use by the checker command
249
created: datetime.datetime(); (UTC) object creation
250
last_enabled: datetime.datetime(); (UTC)
251
enabled: bool()
252
last_checked_ok: datetime.datetime(); (UTC) or None
253
timeout: datetime.timedelta(); How long from last_checked_ok
254
until this client is disabled
255
interval: datetime.timedelta(); How often to start a new checker
256
disable_hook: If set, called by disable() as disable_hook(self)
715
257
checker: subprocess.Popen(); a running checker process used
716
258
to see if the client lives.
717
259
'None' if no process is running.
718
checker_callback_tag: a GObject event source tag, or None
719
checker_command: string; External command which is run to check
720
if client lives. %() expansions are done at
260
checker_initiator_tag: a gobject event source tag, or None
261
disable_initiator_tag: - '' -
262
checker_callback_tag: - '' -
263
checker_command: string; External command which is run to check if
264
client lives. %() expansions are done at
721
265
runtime with vars(self) as dict, so that for
722
266
instance %(name)s can be used in the command.
723
checker_initiator_tag: a GObject event source tag, or None
724
created: datetime.datetime(); (UTC) object creation
725
client_structure: Object describing what attributes a client has
726
and is used for storing the client at exit
727
267
current_checker_command: string; current running checker_command
728
disable_initiator_tag: a GObject event source tag, or None
729
enabled: bool()
730
fingerprint: string (40 or 32 hexadecimal digits); used to
731
uniquely identify the client
732
host: string; available for use by the checker command
733
interval: datetime.timedelta(); How often to start a new checker
734
last_approval_request: datetime.datetime(); (UTC) or None
735
last_checked_ok: datetime.datetime(); (UTC) or None
736
last_checker_status: integer between 0 and 255 reflecting exit
737
status of last checker. -1 reflects crashed
738
checker, -2 means no checker completed yet.
739
last_checker_signal: The signal which killed the last checker, if
740
last_checker_status is -1
741
last_enabled: datetime.datetime(); (UTC) or None
742
name: string; from the config file, used in log messages and
743
D-Bus identifiers
744
secret: bytestring; sent verbatim (over TLS) to client
745
timeout: datetime.timedelta(); How long from last_checked_ok
746
until this client is disabled
747
extended_timeout: extra long timeout when secret has been sent
748
runtime_expansions: Allowed attributes for runtime expansion.
749
expires: datetime.datetime(); time (UTC) when a client will be
750
disabled, or None
751
server_settings: The server_settings dict from main()
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
752
271
"""
753
272
754
runtime_expansions = ("approval_delay", "approval_duration",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
758
"last_enabled", "name", "timeout")
759
client_defaults = {
760
"timeout": "PT5M",
761
"extended_timeout": "PT15M",
762
"interval": "PT2M",
763
"checker": "fping -q -- %%(host)s",
764
"host": "",
765
"approval_delay": "PT0S",
766
"approval_duration": "PT1S",
767
"approved_by_default": "True",
768
"enabled": "True",
769
}
770
771
273
@staticmethod
772
def config_parser(config):
773
"""Construct a new dict of client settings of this form:
774
{ client_name: {setting_name: value, ...}, ...}
775
with exceptions for any special settings as defined above.
776
NOTE: Must be a pure function. Must return the same result
777
value given the same arguments.
778
"""
779
settings = {}
780
for client_name in config.sections():
781
section = dict(config.items(client_name))
782
client = settings[client_name] = {}
783
784
client["host"] = section["host"]
785
# Reformat values from string types to Python types
786
client["approved_by_default"] = config.getboolean(
787
client_name, "approved_by_default")
788
client["enabled"] = config.getboolean(client_name,
789
"enabled")
790
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
794
client["fingerprint"] = (section["fingerprint"].upper()
795
.replace(" ", ""))
796
if "secret" in section:
797
client["secret"] = section["secret"].decode("base64")
798
elif "secfile" in section:
799
with open(os.path.expanduser(os.path.expandvars
800
(section["secfile"])),
801
"rb") as secfile:
802
client["secret"] = secfile.read()
803
else:
804
raise TypeError("No secret or secfile for section {}"
805
.format(section))
806
client["timeout"] = string_to_delta(section["timeout"])
807
client["extended_timeout"] = string_to_delta(
808
section["extended_timeout"])
809
client["interval"] = string_to_delta(section["interval"])
810
client["approval_delay"] = string_to_delta(
811
section["approval_delay"])
812
client["approval_duration"] = string_to_delta(
813
section["approval_duration"])
814
client["checker_command"] = section["checker"]
815
client["last_approval_request"] = None
816
client["last_checked_ok"] = None
817
client["last_checker_status"] = -2
818
819
return settings
820
821
def __init__(self, settings, name = None, server_settings=None):
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
280
def timeout_milliseconds(self):
281
"Return the 'timeout' attribute in milliseconds"
282
return self._timedelta_to_milliseconds(self.timeout)
283
284
def interval_milliseconds(self):
285
"Return the 'interval' attribute in milliseconds"
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
290
291
def __init__(self, name = None, disable_hook=None, config=None):
292
"""Note: the 'checker' key in 'config' sets the
293
'checker_command' attribute and *not* the 'checker'
294
attribute."""
822
295
self.name = name
823
if server_settings is None:
824
server_settings = {}
825
self.server_settings = server_settings
826
# adding all client settings
827
for setting, value in settings.items():
828
setattr(self, setting, value)
829
830
if self.enabled:
831
if not hasattr(self, "last_enabled"):
832
self.last_enabled = datetime.datetime.utcnow()
833
if not hasattr(self, "expires"):
834
self.expires = (datetime.datetime.utcnow()
835
+ self.timeout)
296
if config is None:
297
config = {}
298
logger.debug(u"Creating client %r", self.name)
299
# Uppercase and remove spaces from fingerprint for later
300
# comparison purposes with return value from the fingerprint()
301
# function
302
self.fingerprint = (config[u"fingerprint"].upper()
303
.replace(u" ", u""))
304
logger.debug(u" Fingerprint: %s", self.fingerprint)
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
311
self.secret = secfile.read()
836
312
else:
837
self.last_enabled = None
838
self.expires = None
839
840
logger.debug("Creating client %r", self.name)
841
logger.debug(" Fingerprint: %s", self.fingerprint)
842
self.created = settings.get("created",
843
datetime.datetime.utcnow())
844
845
# attributes specific for this server instance
313
raise TypeError(u"No secret or secfile for client %s"
314
% self.name)
315
self.host = config.get(u"host", u"")
316
self.created = datetime.datetime.utcnow()
317
self.enabled = False
318
self.last_enabled = None
319
self.last_checked_ok = None
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
322
self.disable_hook = disable_hook
846
323
self.checker = None
847
324
self.checker_initiator_tag = None
848
325
self.disable_initiator_tag = None
849
326
self.checker_callback_tag = None
327
self.checker_command = config[u"checker"]
850
328
self.current_checker_command = None
851
self.approved = None
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
852
333
self.approvals_pending = 0
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
857
if not attr.startswith("_")]
858
self.client_structure.append("client_structure")
859
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
862
if not name.startswith("_"):
863
self.client_structure.append(name)
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
864
339
865
# Send notice to process children that client state has changed
866
340
def send_changedstate(self):
867
with self.changedstate:
868
self.changedstate.notify_all()
869
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
870
345
def enable(self):
871
346
"""Start this client's checker and timeout hooks"""
872
if getattr(self, "enabled", False):
347
if getattr(self, u"enabled", False):
873
348
# Already enabled
874
349
return
875
self.expires = datetime.datetime.utcnow() + self.timeout
876
self.enabled = True
350
self.send_changedstate()
877
351
self.last_enabled = datetime.datetime.utcnow()
878
self.init_checker()
879
self.send_changedstate()
352
# Schedule a new checker to be started an 'interval' from now,
353
# and every interval from then on.
354
self.checker_initiator_tag = (gobject.timeout_add
355
(self.interval_milliseconds(),
356
self.start_checker))
357
# Schedule a disable() when 'timeout' has passed
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
self.enabled = True
362
# Also start a new checker *right now*.
363
self.start_checker()
880
364
881
365
def disable(self, quiet=True):
882
366
"""Disable this client."""
883
367
if not getattr(self, "enabled", False):
884
368
return False
885
369
if not quiet:
886
logger.info("Disabling client %s", self.name)
887
if getattr(self, "disable_initiator_tag", None) is not None:
888
GObject.source_remove(self.disable_initiator_tag)
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
374
gobject.source_remove(self.disable_initiator_tag)
889
375
self.disable_initiator_tag = None
890
self.expires = None
891
if getattr(self, "checker_initiator_tag", None) is not None:
892
GObject.source_remove(self.checker_initiator_tag)
376
if getattr(self, u"checker_initiator_tag", False):
377
gobject.source_remove(self.checker_initiator_tag)
893
378
self.checker_initiator_tag = None
894
379
self.stop_checker()
380
if self.disable_hook:
381
self.disable_hook(self)
895
382
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
898
# Do not run this again if called by a GObject.timeout_add
383
# Do not run this again if called by a gobject.timeout_add
899
384
return False
900
385
901
386
def __del__(self):
387
self.disable_hook = None
902
388
self.disable()
903
389
904
def init_checker(self):
905
# Schedule a new checker to be started an 'interval' from now,
906
# and every interval from then on.
907
if self.checker_initiator_tag is not None:
908
GObject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = GObject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
911
self.start_checker)
912
# Schedule a disable() when 'timeout' has passed
913
if self.disable_initiator_tag is not None:
914
GObject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = GObject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
917
# Also start a new checker *right now*.
918
self.start_checker()
919
920
def checker_callback(self, source, condition, connection,
921
command):
390
def checker_callback(self, pid, condition, command):
922
391
"""The checker has completed, so take appropriate actions."""
923
392
self.checker_callback_tag = None
924
393
self.checker = None
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
927
connection.close()
928
929
if returncode >= 0:
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
932
if self.last_checker_status == 0:
933
logger.info("Checker for %(name)s succeeded",
394
if os.WIFEXITED(condition):
395
exitstatus = os.WEXITSTATUS(condition)
396
if exitstatus == 0:
397
logger.info(u"Checker for %(name)s succeeded",
934
398
vars(self))
935
399
self.checked_ok()
936
400
else:
937
logger.info("Checker for %(name)s failed", vars(self))
401
logger.info(u"Checker for %(name)s failed",
402
vars(self))
938
403
else:
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
941
logger.warning("Checker for %(name)s crashed?",
404
logger.warning(u"Checker for %(name)s crashed?",
942
405
vars(self))
943
return False
944
406
945
407
def checked_ok(self):
946
"""Assert that the client has been seen, alive and well."""
408
"""Bump up the timeout for this client.
409
410
This should only be called when the client has been seen,
411
alive and well.
412
"""
947
413
self.last_checked_ok = datetime.datetime.utcnow()
948
self.last_checker_status = 0
949
self.last_checker_signal = None
950
self.bump_timeout()
951
952
def bump_timeout(self, timeout=None):
953
"""Bump up the timeout for this client."""
954
if timeout is None:
955
timeout = self.timeout
956
if self.disable_initiator_tag is not None:
957
GObject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
959
if getattr(self, "enabled", False):
960
self.disable_initiator_tag = GObject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
962
self.expires = datetime.datetime.utcnow() + timeout
963
964
def need_approval(self):
965
self.last_approval_request = datetime.datetime.utcnow()
414
gobject.source_remove(self.disable_initiator_tag)
415
self.disable_initiator_tag = (gobject.timeout_add
416
(self.timeout_milliseconds(),
417
self.disable))
966
418
967
419
def start_checker(self):
968
420
"""Start a new checker subprocess if one is not running.
970
422
If a checker already exists, leave it running and do
971
423
nothing."""
972
424
# The reason for not killing a running checker is that if we
973
# did that, and if a checker (for some reason) started running
974
# slowly and taking more than 'interval' time, then the client
975
# would inevitably timeout, since no checker would get a
976
# chance to run to completion. If we instead leave running
425
# did that, then if a checker (for some reason) started
426
# running slowly and taking more than 'interval' time, the
427
# client would inevitably timeout, since no checker would get
428
# a chance to run to completion. If we instead leave running
977
429
# checkers alone, the checker would have to take more time
978
430
# than 'timeout' for the client to be disabled, which is as it
979
431
# should be.
980
432
981
if self.checker is not None and not self.checker.is_alive():
982
logger.warning("Checker was not alive; joining")
983
self.checker.join()
984
self.checker = None
433
# If a checker exists, make sure it is not a zombie
434
try:
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
441
if pid:
442
logger.warning(u"Checker was a zombie")
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status,
445
self.current_checker_command)
985
446
# Start a new checker if needed
986
447
if self.checker is None:
987
# Escape attributes for the shell
988
escaped_attrs = {
989
attr: re.escape(str(getattr(self, attr)))
990
for attr in self.runtime_expansions }
991
448
try:
992
command = self.checker_command % escaped_attrs
993
except TypeError as error:
994
logger.error('Could not format string "%s"',
995
self.checker_command,
996
exc_info=error)
997
return True # Try again later
449
# In case checker_command has exactly one % operator
450
command = self.checker_command % self.host
451
except TypeError:
452
# Escape attributes for the shell
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
457
for key, val in
458
vars(self).iteritems())
459
try:
460
command = self.checker_command % escaped_attrs
461
except TypeError, error:
462
logger.error(u'Could not format string "%s":'
463
u' %s', self.checker_command, error)
464
return True # Try again later
998
465
self.current_checker_command = command
999
logger.info("Starting checker %r for %s", command,
1000
self.name)
1001
# We don't need to redirect stdout and stderr, since
1002
# in normal mode, that is already done by daemon(),
1003
# and in debug mode we don't want to. (Stdin is
1004
# always replaced by /dev/null.)
1005
# The exception is when not debugging but nevertheless
1006
# running in the foreground; use the previously
1007
# created wnull.
1008
popen_args = { "close_fds": True,
1009
"shell": True,
1010
"cwd": "/" }
1011
if (not self.server_settings["debug"]
1012
and self.server_settings["foreground"]):
1013
popen_args.update({"stdout": wnull,
1014
"stderr": wnull })
1015
pipe = multiprocessing.Pipe(duplex = False)
1016
self.checker = multiprocessing.Process(
1017
target = call_pipe,
1018
args = (pipe[1], subprocess.call, command),
1019
kwargs = popen_args)
1020
self.checker.start()
1021
self.checker_callback_tag = GObject.io_add_watch(
1022
pipe[0].fileno(), GObject.IO_IN,
1023
self.checker_callback, pipe[0], command)
1024
# Re-run this periodically if run by GObject.timeout_add
466
try:
467
logger.info(u"Starting checker %r for %s",
468
command, self.name)
469
# We don't need to redirect stdout and stderr, since
470
# in normal mode, that is already done by daemon(),
471
# and in debug mode we don't want to. (Stdin is
472
# always replaced by /dev/null.)
473
self.checker = subprocess.Popen(command,
474
close_fds=True,
475
shell=True, cwd=u"/")
476
self.checker_callback_tag = (gobject.child_watch_add
477
(self.checker.pid,
478
self.checker_callback,
479
data=command))
480
# The checker may have completed before the gobject
481
# watch was added. Check for this.
482
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
483
if pid:
484
gobject.source_remove(self.checker_callback_tag)
485
self.checker_callback(pid, status, command)
486
except OSError, error:
487
logger.error(u"Failed to start subprocess: %s",
488
error)
489
# Re-run this periodically if run by gobject.timeout_add
1025
490
return True
1026
491
1027
492
def stop_checker(self):
1028
493
"""Force the checker process, if any, to stop."""
1029
494
if self.checker_callback_tag:
1030
GObject.source_remove(self.checker_callback_tag)
495
gobject.source_remove(self.checker_callback_tag)
1031
496
self.checker_callback_tag = None
1032
if getattr(self, "checker", None) is None:
497
if getattr(self, u"checker", None) is None:
1033
498
return
1034
logger.debug("Stopping checker for %(name)s", vars(self))
1035
self.checker.terminate()
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
500
try:
501
os.kill(self.checker.pid, signal.SIGTERM)
502
#time.sleep(0.5)
503
#if self.checker.poll() is None:
504
# os.kill(self.checker.pid, signal.SIGKILL)
505
except OSError, error:
506
if error.errno != errno.ESRCH: # No such process
507
raise
1036
508
self.checker = None
1037
509
1038
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
1043
512
"""Decorators for marking methods of a DBusObjectWithProperties to
1044
513
become properties on the D-Bus.
1045
514
1052
521
"""
1053
522
# Encoding deeply encoded byte arrays is not supported yet by the
1054
523
# "Set" method, so we fail early here:
1055
if byte_arrays and signature != "ay":
1056
raise ValueError("Byte arrays not supported for non-'ay'"
1057
" signature {!r}".format(signature))
1058
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
1059
527
def decorator(func):
1060
528
func._dbus_is_property = True
1061
529
func._dbus_interface = dbus_interface
1062
530
func._dbus_signature = signature
1063
531
func._dbus_access = access
1064
532
func._dbus_name = func.__name__
1065
if func._dbus_name.endswith("_dbus_property"):
533
if func._dbus_name.endswith(u"_dbus_property"):
1066
534
func._dbus_name = func._dbus_name[:-14]
1067
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1068
return func
1069
1070
return decorator
1071
1072
1073
def dbus_interface_annotations(dbus_interface):
1074
"""Decorator for marking functions returning interface annotations
1075
1076
Usage:
1077
1078
@dbus_interface_annotations("org.example.Interface")
1079
def _foo(self): # Function name does not matter
1080
return {"org.freedesktop.DBus.Deprecated": "true",
1081
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1082
"false"}
1083
"""
1084
1085
def decorator(func):
1086
func._dbus_is_interface = True
1087
func._dbus_interface = dbus_interface
1088
func._dbus_name = dbus_interface
1089
return func
1090
1091
return decorator
1092
1093
1094
def dbus_annotations(annotations):
1095
"""Decorator to annotate D-Bus methods, signals or properties
1096
Usage:
1097
1098
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1099
"org.freedesktop.DBus.Property."
1100
"EmitsChangedSignal": "false"})
1101
@dbus_service_property("org.example.Interface", signature="b",
1102
access="r")
1103
def Property_dbus_property(self):
1104
return dbus.Boolean(False)
1105
1106
See also the DBusObjectWithAnnotations class.
1107
"""
1108
1109
def decorator(func):
1110
func._dbus_annotations = annotations
1111
return func
1112
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
1113
537
return decorator
1114
538
1115
539
1116
540
class DBusPropertyException(dbus.exceptions.DBusException):
1117
541
"""A base class for D-Bus property-related exceptions
1118
542
"""
1119
pass
543
def __unicode__(self):
544
return unicode(str(self))
1120
545
1121
546
1122
547
class DBusPropertyAccessException(DBusPropertyException):
1131
556
pass
1132
557
1133
558
1134
class DBusObjectWithAnnotations(dbus.service.Object):
1135
"""A D-Bus object with annotations.
1136
1137
Classes inheriting from this can use the dbus_annotations
1138
decorator to add annotations to methods or signals.
1139
"""
1140
1141
@staticmethod
1142
def _is_dbus_thing(thing):
1143
"""Returns a function testing if an attribute is a D-Bus thing
1144
1145
If called like _is_dbus_thing("method") it returns a function
1146
suitable for use as predicate to inspect.getmembers().
1147
"""
1148
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1149
False)
1150
1151
def _get_all_dbus_things(self, thing):
1152
"""Returns a generator of (name, attribute) pairs
1153
"""
1154
return ((getattr(athing.__get__(self), "_dbus_name", name),
1155
athing.__get__(self))
1156
for cls in self.__class__.__mro__
1157
for name, athing in
1158
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1159
1160
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1161
out_signature = "s",
1162
path_keyword = 'object_path',
1163
connection_keyword = 'connection')
1164
def Introspect(self, object_path, connection):
1165
"""Overloading of standard D-Bus method.
1166
1167
Inserts annotation tags on methods and signals.
1168
"""
1169
xmlstring = dbus.service.Object.Introspect(self, object_path,
1170
connection)
1171
try:
1172
document = xml.dom.minidom.parseString(xmlstring)
1173
1174
for if_tag in document.getElementsByTagName("interface"):
1175
# Add annotation tags
1176
for typ in ("method", "signal"):
1177
for tag in if_tag.getElementsByTagName(typ):
1178
annots = dict()
1179
for name, prop in (self.
1180
_get_all_dbus_things(typ)):
1181
if (name == tag.getAttribute("name")
1182
and prop._dbus_interface
1183
== if_tag.getAttribute("name")):
1184
annots.update(getattr(
1185
prop, "_dbus_annotations", {}))
1186
for name, value in annots.items():
1187
ann_tag = document.createElement(
1188
"annotation")
1189
ann_tag.setAttribute("name", name)
1190
ann_tag.setAttribute("value", value)
1191
tag.appendChild(ann_tag)
1192
# Add interface annotation tags
1193
for annotation, value in dict(
1194
itertools.chain.from_iterable(
1195
annotations().items()
1196
for name, annotations
1197
in self._get_all_dbus_things("interface")
1198
if name == if_tag.getAttribute("name")
1199
)).items():
1200
ann_tag = document.createElement("annotation")
1201
ann_tag.setAttribute("name", annotation)
1202
ann_tag.setAttribute("value", value)
1203
if_tag.appendChild(ann_tag)
1204
# Fix argument name for the Introspect method itself
1205
if (if_tag.getAttribute("name")
1206
== dbus.INTROSPECTABLE_IFACE):
1207
for cn in if_tag.getElementsByTagName("method"):
1208
if cn.getAttribute("name") == "Introspect":
1209
for arg in cn.getElementsByTagName("arg"):
1210
if (arg.getAttribute("direction")
1211
== "out"):
1212
arg.setAttribute("name",
1213
"xml_data")
1214
xmlstring = document.toxml("utf-8")
1215
document.unlink()
1216
except (AttributeError, xml.dom.DOMException,
1217
xml.parsers.expat.ExpatError) as error:
1218
logger.error("Failed to override Introspection method",
1219
exc_info=error)
1220
return xmlstring
1221
1222
1223
class DBusObjectWithProperties(DBusObjectWithAnnotations):
559
class DBusObjectWithProperties(dbus.service.Object):
1224
560
"""A D-Bus object with properties.
1225
561
1226
562
Classes inheriting from this can use the dbus_service_property
1227
563
decorator to expose methods as D-Bus properties. It exposes the
1228
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
1229
565
"""
1230
566
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
1231
578
def _get_dbus_property(self, interface_name, property_name):
1232
579
"""Returns a bound method if one exists which is a D-Bus
1233
580
property with the specified name and interface.
1234
581
"""
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
1238
if (value._dbus_name == property_name
1239
and value._dbus_interface == interface_name):
1240
return value.__get__(self)
1241
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
1242
592
# No such property
1243
raise DBusPropertyNotFound("{}:{}.{}".format(
1244
self.dbus_object_path, interface_name, property_name))
1245
1246
@classmethod
1247
def _get_all_interface_names(cls):
1248
"""Get a sequence of all interfaces supported by an object"""
1249
return (name for name in set(getattr(getattr(x, attr),
1250
"_dbus_interface", None)
1251
for x in (inspect.getmro(cls))
1252
for attr in dir(x))
1253
if name is not None)
1254
1255
@dbus.service.method(dbus.PROPERTIES_IFACE,
1256
in_signature="ss",
1257
out_signature="v")
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
1258
599
def Get(self, interface_name, property_name):
1259
600
"""Standard D-Bus property Get() method, see D-Bus standard.
1260
601
"""
1261
602
prop = self._get_dbus_property(interface_name, property_name)
1262
if prop._dbus_access == "write":
603
if prop._dbus_access == u"write":
1263
604
raise DBusPropertyAccessException(property_name)
1264
605
value = prop()
1265
if not hasattr(value, "variant_level"):
606
if not hasattr(value, u"variant_level"):
1266
607
return value
1267
608
return type(value)(value, variant_level=value.variant_level+1)
1268
609
1269
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1270
611
def Set(self, interface_name, property_name, value):
1271
612
"""Standard D-Bus property Set() method, see D-Bus standard.
1272
613
"""
1273
614
prop = self._get_dbus_property(interface_name, property_name)
1274
if prop._dbus_access == "read":
615
if prop._dbus_access == u"read":
1275
616
raise DBusPropertyAccessException(property_name)
1276
if prop._dbus_get_args_options["byte_arrays"]:
617
if prop._dbus_get_args_options[u"byte_arrays"]:
1277
618
# The byte_arrays option is not supported yet on
1278
619
# signatures other than "ay".
1279
if prop._dbus_signature != "ay":
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
1283
value = dbus.ByteArray(b''.join(chr(byte)
1284
for byte in value))
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
1285
624
prop(value)
1286
625
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1288
in_signature="s",
1289
out_signature="a{sv}")
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
1290
628
def GetAll(self, interface_name):
1291
629
"""Standard D-Bus property GetAll() method, see D-Bus
1292
630
standard.
1293
631
1294
632
Note: Will not include properties with access="write".
1295
633
"""
1296
properties = {}
1297
for name, prop in self._get_all_dbus_things("property"):
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
1298
636
if (interface_name
1299
637
and interface_name != prop._dbus_interface):
1300
638
# Interface non-empty but did not match
1301
639
continue
1302
640
# Ignore write-only properties
1303
if prop._dbus_access == "write":
641
if prop._dbus_access == u"write":
1304
642
continue
1305
643
value = prop()
1306
if not hasattr(value, "variant_level"):
1307
properties[name] = value
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
1308
646
continue
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
1311
return dbus.Dictionary(properties, signature="sv")
1312
1313
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1314
def PropertiesChanged(self, interface_name, changed_properties,
1315
invalidated_properties):
1316
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1317
standard.
1318
"""
1319
pass
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
1320
650
1321
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1322
out_signature="s",
652
out_signature=u"s",
1323
653
path_keyword='object_path',
1324
654
connection_keyword='connection')
1325
655
def Introspect(self, object_path, connection):
1326
"""Overloading of standard D-Bus method.
1327
1328
Inserts property tags and interface annotation tags.
656
"""Standard D-Bus method, overloaded to insert property tags.
1329
657
"""
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1331
object_path,
1332
connection)
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
1333
660
try:
1334
661
document = xml.dom.minidom.parseString(xmlstring)
1335
1336
662
def make_tag(document, name, prop):
1337
e = document.createElement("property")
1338
e.setAttribute("name", name)
1339
e.setAttribute("type", prop._dbus_signature)
1340
e.setAttribute("access", prop._dbus_access)
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
1341
667
return e
1342
1343
for if_tag in document.getElementsByTagName("interface"):
1344
# Add property tags
668
for if_tag in document.getElementsByTagName(u"interface"):
1345
669
for tag in (make_tag(document, name, prop)
1346
670
for name, prop
1347
in self._get_all_dbus_things("property")
671
in self._get_all_dbus_properties()
1348
672
if prop._dbus_interface
1349
== if_tag.getAttribute("name")):
673
== if_tag.getAttribute(u"name")):
1350
674
if_tag.appendChild(tag)
1351
# Add annotation tags for properties
1352
for tag in if_tag.getElementsByTagName("property"):
1353
annots = dict()
1354
for name, prop in self._get_all_dbus_things(
1355
"property"):
1356
if (name == tag.getAttribute("name")
1357
and prop._dbus_interface
1358
== if_tag.getAttribute("name")):
1359
annots.update(getattr(
1360
prop, "_dbus_annotations", {}))
1361
for name, value in annots.items():
1362
ann_tag = document.createElement(
1363
"annotation")
1364
ann_tag.setAttribute("name", name)
1365
ann_tag.setAttribute("value", value)
1366
tag.appendChild(ann_tag)
1367
675
# Add the names to the return values for the
1368
676
# "org.freedesktop.DBus.Properties" methods
1369
if (if_tag.getAttribute("name")
1370
== "org.freedesktop.DBus.Properties"):
1371
for cn in if_tag.getElementsByTagName("method"):
1372
if cn.getAttribute("name") == "Get":
1373
for arg in cn.getElementsByTagName("arg"):
1374
if (arg.getAttribute("direction")
1375
== "out"):
1376
arg.setAttribute("name", "value")
1377
elif cn.getAttribute("name") == "GetAll":
1378
for arg in cn.getElementsByTagName("arg"):
1379
if (arg.getAttribute("direction")
1380
== "out"):
1381
arg.setAttribute("name", "props")
1382
xmlstring = document.toxml("utf-8")
1383
document.unlink()
1384
except (AttributeError, xml.dom.DOMException,
1385
xml.parsers.expat.ExpatError) as error:
1386
logger.error("Failed to override Introspection method",
1387
exc_info=error)
1388
return xmlstring
1389
1390
try:
1391
dbus.OBJECT_MANAGER_IFACE
1392
except AttributeError:
1393
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1394
1395
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
"""A D-Bus object with an ObjectManager.
1397
1398
Classes inheriting from this exposes the standard
1399
GetManagedObjects call and the InterfacesAdded and
1400
InterfacesRemoved signals on the standard
1401
"org.freedesktop.DBus.ObjectManager" interface.
1402
1403
Note: No signals are sent automatically; they must be sent
1404
manually.
1405
"""
1406
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1408
def GetManagedObjects(self):
1409
"""This function must be overridden"""
1410
raise NotImplementedError()
1411
1412
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1414
def InterfacesAdded(self, object_path, interfaces_and_properties):
1415
pass
1416
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1418
def InterfacesRemoved(self, object_path, interfaces):
1419
pass
1420
1421
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1425
def Introspect(self, object_path, connection):
1426
"""Overloading of standard D-Bus method.
1427
1428
Override return argument name of GetManagedObjects to be
1429
"objpath_interfaces_and_properties"
1430
"""
1431
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1432
object_path,
1433
connection)
1434
try:
1435
document = xml.dom.minidom.parseString(xmlstring)
1436
1437
for if_tag in document.getElementsByTagName("interface"):
1438
# Fix argument name for the GetManagedObjects method
1439
if (if_tag.getAttribute("name")
1440
== dbus.OBJECT_MANAGER_IFACE):
1441
for cn in if_tag.getElementsByTagName("method"):
1442
if (cn.getAttribute("name")
1443
== "GetManagedObjects"):
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1446
== "out"):
1447
arg.setAttribute(
1448
"name",
1449
"objpath_interfaces"
1450
"_and_properties")
1451
xmlstring = document.toxml("utf-8")
1452
document.unlink()
1453
except (AttributeError, xml.dom.DOMException,
1454
xml.parsers.expat.ExpatError) as error:
1455
logger.error("Failed to override Introspection method",
1456
exc_info = error)
1457
return xmlstring
1458
1459
def datetime_to_dbus(dt, variant_level=0):
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1461
if dt is None:
1462
return dbus.String("", variant_level = variant_level)
1463
return dbus.String(dt.isoformat(), variant_level=variant_level)
1464
1465
1466
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1467
"""A class decorator; applied to a subclass of
1468
dbus.service.Object, it will add alternate D-Bus attributes with
1469
interface names according to the "alt_interface_names" mapping.
1470
Usage:
1471
1472
@alternate_dbus_interfaces({"org.example.Interface":
1473
"net.example.AlternateInterface"})
1474
class SampleDBusObject(dbus.service.Object):
1475
@dbus.service.method("org.example.Interface")
1476
def SampleDBusMethod():
1477
pass
1478
1479
The above "SampleDBusMethod" on "SampleDBusObject" will be
1480
reachable via two interfaces: "org.example.Interface" and
1481
"net.example.AlternateInterface", the latter of which will have
1482
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1483
"true", unless "deprecate" is passed with a False value.
1484
1485
This works for methods and signals, and also for D-Bus properties
1486
(from DBusObjectWithProperties) and interfaces (from the
1487
dbus_interface_annotations decorator).
1488
"""
1489
1490
def wrapper(cls):
1491
for orig_interface_name, alt_interface_name in (
1492
alt_interface_names.items()):
1493
attr = {}
1494
interface_names = set()
1495
# Go though all attributes of the class
1496
for attrname, attribute in inspect.getmembers(cls):
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
1498
# with the wrong interface name
1499
if (not hasattr(attribute, "_dbus_interface")
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
1502
continue
1503
# Create an alternate D-Bus interface name based on
1504
# the current name
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
1508
# Is this a D-Bus signal?
1509
if getattr(attribute, "_dbus_is_signal", False):
1510
if sys.version_info.major == 2:
1511
# Extract the original non-method undecorated
1512
# function by black magic
1513
nonmethod_func = (dict(
1514
zip(attribute.func_code.co_freevars,
1515
attribute.__closure__))
1516
["func"].cell_contents)
1517
else:
1518
nonmethod_func = attribute
1519
# Create a new, but exactly alike, function
1520
# object, and decorate it to be a new D-Bus signal
1521
# with the alternate D-Bus interface name
1522
if sys.version_info.major == 2:
1523
new_function = types.FunctionType(
1524
nonmethod_func.func_code,
1525
nonmethod_func.func_globals,
1526
nonmethod_func.func_name,
1527
nonmethod_func.func_defaults,
1528
nonmethod_func.func_closure)
1529
else:
1530
new_function = types.FunctionType(
1531
nonmethod_func.__code__,
1532
nonmethod_func.__globals__,
1533
nonmethod_func.__name__,
1534
nonmethod_func.__defaults__,
1535
nonmethod_func.__closure__)
1536
new_function = (dbus.service.signal(
1537
alt_interface,
1538
attribute._dbus_signature)(new_function))
1539
# Copy annotations, if any
1540
try:
1541
new_function._dbus_annotations = dict(
1542
attribute._dbus_annotations)
1543
except AttributeError:
1544
pass
1545
# Define a creator of a function to call both the
1546
# original and alternate functions, so both the
1547
# original and alternate signals gets sent when
1548
# the function is called
1549
def fixscope(func1, func2):
1550
"""This function is a scope container to pass
1551
func1 and func2 to the "call_both" function
1552
outside of its arguments"""
1553
1554
@functools.wraps(func2)
1555
def call_both(*args, **kwargs):
1556
"""This function will emit two D-Bus
1557
signals by calling func1 and func2"""
1558
func1(*args, **kwargs)
1559
func2(*args, **kwargs)
1560
# Make wrapper function look like a D-Bus signal
1561
for name, attr in inspect.getmembers(func2):
1562
if name.startswith("_dbus_"):
1563
setattr(call_both, name, attr)
1564
1565
return call_both
1566
# Create the "call_both" function and add it to
1567
# the class
1568
attr[attrname] = fixscope(attribute, new_function)
1569
# Is this a D-Bus method?
1570
elif getattr(attribute, "_dbus_is_method", False):
1571
# Create a new, but exactly alike, function
1572
# object. Decorate it to be a new D-Bus method
1573
# with the alternate D-Bus interface name. Add it
1574
# to the class.
1575
attr[attrname] = (
1576
dbus.service.method(
1577
alt_interface,
1578
attribute._dbus_in_signature,
1579
attribute._dbus_out_signature)
1580
(types.FunctionType(attribute.func_code,
1581
attribute.func_globals,
1582
attribute.func_name,
1583
attribute.func_defaults,
1584
attribute.func_closure)))
1585
# Copy annotations, if any
1586
try:
1587
attr[attrname]._dbus_annotations = dict(
1588
attribute._dbus_annotations)
1589
except AttributeError:
1590
pass
1591
# Is this a D-Bus property?
1592
elif getattr(attribute, "_dbus_is_property", False):
1593
# Create a new, but exactly alike, function
1594
# object, and decorate it to be a new D-Bus
1595
# property with the alternate D-Bus interface
1596
# name. Add it to the class.
1597
attr[attrname] = (dbus_service_property(
1598
alt_interface, attribute._dbus_signature,
1599
attribute._dbus_access,
1600
attribute._dbus_get_args_options
1601
["byte_arrays"])
1602
(types.FunctionType(
1603
attribute.func_code,
1604
attribute.func_globals,
1605
attribute.func_name,
1606
attribute.func_defaults,
1607
attribute.func_closure)))
1608
# Copy annotations, if any
1609
try:
1610
attr[attrname]._dbus_annotations = dict(
1611
attribute._dbus_annotations)
1612
except AttributeError:
1613
pass
1614
# Is this a D-Bus interface?
1615
elif getattr(attribute, "_dbus_is_interface", False):
1616
# Create a new, but exactly alike, function
1617
# object. Decorate it to be a new D-Bus interface
1618
# with the alternate D-Bus interface name. Add it
1619
# to the class.
1620
attr[attrname] = (
1621
dbus_interface_annotations(alt_interface)
1622
(types.FunctionType(attribute.func_code,
1623
attribute.func_globals,
1624
attribute.func_name,
1625
attribute.func_defaults,
1626
attribute.func_closure)))
1627
if deprecate:
1628
# Deprecate all alternate interfaces
1629
iname="_AlternateDBusNames_interface_annotation{}"
1630
for interface_name in interface_names:
1631
1632
@dbus_interface_annotations(interface_name)
1633
def func(self):
1634
return { "org.freedesktop.DBus.Deprecated":
1635
"true" }
1636
# Find an unused name
1637
for aname in (iname.format(i)
1638
for i in itertools.count()):
1639
if aname not in attr:
1640
attr[aname] = func
1641
break
1642
if interface_names:
1643
# Replace the class with a new subclass of it with
1644
# methods, signals, etc. as created above.
1645
cls = type(b"{}Alternate".format(cls.__name__),
1646
(cls, ), attr)
1647
return cls
1648
1649
return wrapper
1650
1651
1652
@alternate_dbus_interfaces({"se.recompile.Mandos":
1653
"se.bsnet.fukt.Mandos"})
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
1654
699
class ClientDBus(Client, DBusObjectWithProperties):
1655
700
"""A Client class using D-Bus
1656
701
1658
703
dbus_object_path: dbus.ObjectPath
1659
704
bus: dbus.SystemBus()
1660
705
"""
1661
1662
runtime_expansions = (Client.runtime_expansions
1663
+ ("dbus_object_path", ))
1664
1665
_interface = "se.recompile.Mandos.Client"
1666
1667
706
# dbus.service.Object doesn't use super(), so we can't either.
1668
707
1669
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
1670
710
self.bus = bus
1671
711
Client.__init__(self, *args, **kwargs)
1672
712
# Only now, when this client is initialized, can it show up on
1673
713
# the D-Bus
1674
client_object_name = str(self.name).translate(
1675
{ord("."): ord("_"),
1676
ord("-"): ord("_")})
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
714
self.dbus_object_path = (dbus.ObjectPath
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
1679
717
DBusObjectWithProperties.__init__(self, self.bus,
1680
718
self.dbus_object_path)
1681
1682
def notifychangeproperty(transform_func, dbus_name,
1683
type_func=lambda x: x,
1684
variant_level=1,
1685
invalidate_only=False,
1686
_interface=_interface):
1687
""" Modify a variable so that it's a property which announces
1688
its changes to DBus.
1689
1690
transform_fun: Function that takes a value and a variant_level
1691
and transforms it to a D-Bus type.
1692
dbus_name: D-Bus name of the variable
1693
type_func: Function that transform the value before sending it
1694
to the D-Bus. Default: no transform
1695
variant_level: D-Bus variant level. Default: 1
1696
"""
1697
attrname = "_{}".format(dbus_name)
1698
1699
def setter(self, value):
1700
if hasattr(self, "dbus_object_path"):
1701
if (not hasattr(self, attrname) or
1702
type_func(getattr(self, attrname, None))
1703
!= type_func(value)):
1704
if invalidate_only:
1705
self.PropertiesChanged(
1706
_interface, dbus.Dictionary(),
1707
dbus.Array((dbus_name, )))
1708
else:
1709
dbus_value = transform_func(
1710
type_func(value),
1711
variant_level = variant_level)
1712
self.PropertyChanged(dbus.String(dbus_name),
1713
dbus_value)
1714
self.PropertiesChanged(
1715
_interface,
1716
dbus.Dictionary({ dbus.String(dbus_name):
1717
dbus_value }),
1718
dbus.Array())
1719
setattr(self, attrname, value)
1720
1721
return property(lambda self: getattr(self, attrname), setter)
1722
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
1725
"ApprovalPending",
1726
type_func = bool)
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
1729
"LastEnabled")
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1734
"LastCheckedOK")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1737
last_approval_request = notifychangeproperty(
1738
datetime_to_dbus, "LastApprovalRequest")
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
1740
"ApprovedByDefault")
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
1744
approval_duration = notifychangeproperty(
1745
dbus.UInt64, "ApprovalDuration",
1746
type_func = lambda td: td.total_seconds() * 1000)
1747
host = notifychangeproperty(dbus.String, "Host")
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
1751
extended_timeout = notifychangeproperty(
1752
dbus.UInt64, "ExtendedTimeout",
1753
type_func = lambda td: td.total_seconds() * 1000)
1754
interval = notifychangeproperty(
1755
dbus.UInt64, "Interval",
1756
type_func = lambda td: td.total_seconds() * 1000)
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
1760
1761
del notifychangeproperty
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
742
def enable(self):
743
oldstate = getattr(self, u"enabled", False)
744
r = Client.enable(self)
745
if oldstate != self.enabled:
746
# Emit D-Bus signals
747
self.PropertyChanged(dbus.String(u"Enabled"),
748
dbus.Boolean(True, variant_level=1))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
753
return r
754
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
759
# Emit D-Bus signal
760
self.PropertyChanged(dbus.String(u"Enabled"),
761
dbus.Boolean(False, variant_level=1))
762
return r
1762
763
1763
764
def __del__(self, *args, **kwargs):
1764
765
try:
1765
766
self.remove_from_connection()
1766
767
except LookupError:
1767
768
pass
1768
if hasattr(DBusObjectWithProperties, "__del__"):
769
if hasattr(DBusObjectWithProperties, u"__del__"):
1769
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1770
771
Client.__del__(self, *args, **kwargs)
1771
772
1772
def checker_callback(self, source, condition,
1773
connection, command, *args, **kwargs):
1774
ret = Client.checker_callback(self, source, condition,
1775
connection, command, *args,
1776
**kwargs)
1777
exitstatus = self.last_checker_status
1778
if exitstatus >= 0:
773
def checker_callback(self, pid, condition, command,
774
*args, **kwargs):
775
self.checker_callback_tag = None
776
self.checker = None
777
# Emit D-Bus signal
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
779
dbus.Boolean(False, variant_level=1))
780
if os.WIFEXITED(condition):
781
exitstatus = os.WEXITSTATUS(condition)
1779
782
# Emit D-Bus signal
1780
783
self.CheckerCompleted(dbus.Int16(exitstatus),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
784
dbus.Int64(condition),
1783
785
dbus.String(command))
1784
786
else:
1785
787
# Emit D-Bus signal
1786
788
self.CheckerCompleted(dbus.Int16(-1),
1787
dbus.Int64(
1788
# This is specific to GNU libC
1789
(exitstatus << 8)
1790
| self.last_checker_signal),
789
dbus.Int64(condition),
1791
790
dbus.String(command))
1792
return ret
791
792
return Client.checker_callback(self, pid, condition, command,
793
*args, **kwargs)
794
795
def checked_ok(self, *args, **kwargs):
796
r = Client.checked_ok(self, *args, **kwargs)
797
# Emit D-Bus signal
798
self.PropertyChanged(
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
802
return r
1793
803
1794
804
def start_checker(self, *args, **kwargs):
1795
old_checker_pid = getattr(self.checker, "pid", None)
805
old_checker = self.checker
806
if self.checker is not None:
807
old_checker_pid = self.checker.pid
808
else:
809
old_checker_pid = None
1796
810
r = Client.start_checker(self, *args, **kwargs)
1797
811
# Only if new checker process was started
1798
812
if (self.checker is not None
1799
813
and old_checker_pid != self.checker.pid):
1800
814
# Emit D-Bus signal
1801
815
self.CheckerStarted(self.current_checker_command)
816
self.PropertyChanged(
817
dbus.String(u"CheckerRunning"),
818
dbus.Boolean(True, variant_level=1))
1802
819
return r
1803
820
821
def stop_checker(self, *args, **kwargs):
822
old_checker = getattr(self, u"checker", None)
823
r = Client.stop_checker(self, *args, **kwargs)
824
if (old_checker is not None
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
827
dbus.Boolean(False, variant_level=1))
828
return r
829
1804
830
def _reset_approved(self):
1805
self.approved = None
831
self._approved = None
1806
832
return False
1807
833
1808
834
def approve(self, value=True):
1809
self.approved = value
1810
GObject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
1812
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
1813
841
1814
842
## D-Bus methods, signals & properties
1815
1816
## Interfaces
843
_interface = u"se.bsnet.fukt.Mandos.Client"
1817
844
1818
845
## Signals
1819
846
1820
847
# CheckerCompleted - signal
1821
@dbus.service.signal(_interface, signature="nxs")
848
@dbus.service.signal(_interface, signature=u"nxs")
1822
849
def CheckerCompleted(self, exitcode, waitstatus, command):
1823
850
"D-Bus signal"
1824
851
pass
1825
852
1826
853
# CheckerStarted - signal
1827
@dbus.service.signal(_interface, signature="s")
854
@dbus.service.signal(_interface, signature=u"s")
1828
855
def CheckerStarted(self, command):
1829
856
"D-Bus signal"
1830
857
pass
1831
858
1832
859
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1834
@dbus.service.signal(_interface, signature="sv")
860
@dbus.service.signal(_interface, signature=u"sv")
1835
861
def PropertyChanged(self, property, value):
1836
862
"D-Bus signal"
1837
863
pass
1846
872
pass
1847
873
1848
874
# Rejected - signal
1849
@dbus.service.signal(_interface, signature="s")
875
@dbus.service.signal(_interface, signature=u"s")
1850
876
def Rejected(self, reason):
1851
877
"D-Bus signal"
1852
878
pass
1853
879
1854
880
# NeedApproval - signal
1855
@dbus.service.signal(_interface, signature="tb")
881
@dbus.service.signal(_interface, signature=u"tb")
1856
882
def NeedApproval(self, timeout, default):
1857
883
"D-Bus signal"
1858
return self.need_approval()
884
pass
1859
885
1860
886
## Methods
1861
887
1862
888
# Approve - method
1863
@dbus.service.method(_interface, in_signature="b")
889
@dbus.service.method(_interface, in_signature=u"b")
1864
890
def Approve(self, value):
1865
891
self.approve(value)
1866
892
1867
893
# CheckedOK - method
1868
894
@dbus.service.method(_interface)
1869
895
def CheckedOK(self):
1870
self.checked_ok()
896
return self.checked_ok()
1871
897
1872
898
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1874
899
@dbus.service.method(_interface)
1875
900
def Enable(self):
1876
901
"D-Bus method"
1877
902
self.enable()
1878
903
1879
904
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1881
905
@dbus.service.method(_interface)
1882
906
def StartChecker(self):
1883
907
"D-Bus method"
1884
908
self.start_checker()
1885
909
1886
910
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1888
911
@dbus.service.method(_interface)
1889
912
def Disable(self):
1890
913
"D-Bus method"
1891
914
self.disable()
1892
915
1893
916
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1895
917
@dbus.service.method(_interface)
1896
918
def StopChecker(self):
1897
919
self.stop_checker()
1899
921
## Properties
1900
922
1901
923
# ApprovalPending - property
1902
@dbus_service_property(_interface, signature="b", access="read")
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
1903
925
def ApprovalPending_dbus_property(self):
1904
926
return dbus.Boolean(bool(self.approvals_pending))
1905
927
1906
928
# ApprovedByDefault - property
1907
@dbus_service_property(_interface,
1908
signature="b",
1909
access="readwrite")
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
1910
931
def ApprovedByDefault_dbus_property(self, value=None):
1911
932
if value is None: # get
1912
933
return dbus.Boolean(self.approved_by_default)
1913
934
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
1914
938
1915
939
# ApprovalDelay - property
1916
@dbus_service_property(_interface,
1917
signature="t",
1918
access="readwrite")
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
1919
942
def ApprovalDelay_dbus_property(self, value=None):
1920
943
if value is None: # get
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1922
* 1000)
944
return dbus.UInt64(self.approval_delay_milliseconds())
1923
945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
1924
949
1925
950
# ApprovalDuration - property
1926
@dbus_service_property(_interface,
1927
signature="t",
1928
access="readwrite")
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
1929
953
def ApprovalDuration_dbus_property(self, value=None):
1930
954
if value is None: # get
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1932
* 1000)
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
1933
957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
1934
961
1935
962
# Name - property
1936
@dbus_annotations(
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1938
@dbus_service_property(_interface, signature="s", access="read")
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
1939
964
def Name_dbus_property(self):
1940
965
return dbus.String(self.name)
1941
966
1942
967
# Fingerprint - property
1943
@dbus_annotations(
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1945
@dbus_service_property(_interface, signature="s", access="read")
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
1946
969
def Fingerprint_dbus_property(self):
1947
970
return dbus.String(self.fingerprint)
1948
971
1949
972
# Host - property
1950
@dbus_service_property(_interface,
1951
signature="s",
1952
access="readwrite")
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
1953
975
def Host_dbus_property(self, value=None):
1954
976
if value is None: # get
1955
977
return dbus.String(self.host)
1956
self.host = str(value)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
1957
982
1958
983
# Created - property
1959
@dbus_annotations(
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1961
@dbus_service_property(_interface, signature="s", access="read")
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
1962
985
def Created_dbus_property(self):
1963
return datetime_to_dbus(self.created)
986
return dbus.String(self._datetime_to_dbus(self.created))
1964
987
1965
988
# LastEnabled - property
1966
@dbus_service_property(_interface, signature="s", access="read")
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
1967
990
def LastEnabled_dbus_property(self):
1968
return datetime_to_dbus(self.last_enabled)
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1969
994
1970
995
# Enabled - property
1971
@dbus_service_property(_interface,
1972
signature="b",
1973
access="readwrite")
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
1974
998
def Enabled_dbus_property(self, value=None):
1975
999
if value is None: # get
1976
1000
return dbus.Boolean(self.enabled)
1980
1004
self.disable()
1981
1005
1982
1006
# LastCheckedOK - property
1983
@dbus_service_property(_interface,
1984
signature="s",
1985
access="readwrite")
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
1986
1009
def LastCheckedOK_dbus_property(self, value=None):
1987
1010
if value is not None:
1988
1011
self.checked_ok()
1989
1012
return
1990
return datetime_to_dbus(self.last_checked_ok)
1991
1992
# LastCheckerStatus - property
1993
@dbus_service_property(_interface, signature="n", access="read")
1994
def LastCheckerStatus_dbus_property(self):
1995
return dbus.Int16(self.last_checker_status)
1996
1997
# Expires - property
1998
@dbus_service_property(_interface, signature="s", access="read")
1999
def Expires_dbus_property(self):
2000
return datetime_to_dbus(self.expires)
2001
2002
# LastApprovalRequest - property
2003
@dbus_service_property(_interface, signature="s", access="read")
2004
def LastApprovalRequest_dbus_property(self):
2005
return datetime_to_dbus(self.last_approval_request)
1013
if self.last_checked_ok is None:
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
2006
1017
2007
1018
# Timeout - property
2008
@dbus_service_property(_interface,
2009
signature="t",
2010
access="readwrite")
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
2011
1021
def Timeout_dbus_property(self, value=None):
2012
1022
if value is None: # get
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
1023
return dbus.UInt64(self.timeout_milliseconds())
2015
1024
self.timeout = datetime.timedelta(0, 0, 0, value)
2016
# Reschedule disabling
2017
if self.enabled:
2018
now = datetime.datetime.utcnow()
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
2021
# The timeout has passed
2022
self.disable()
2023
else:
2024
if (getattr(self, "disable_initiator_tag", None)
2025
is None):
2026
return
2027
GObject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = GObject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2030
self.disable)
2031
2032
# ExtendedTimeout - property
2033
@dbus_service_property(_interface,
2034
signature="t",
2035
access="readwrite")
2036
def ExtendedTimeout_dbus_property(self, value=None):
2037
if value is None: # get
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2039
* 1000)
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
2041
1045
2042
1046
# Interval - property
2043
@dbus_service_property(_interface,
2044
signature="t",
2045
access="readwrite")
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
2046
1049
def Interval_dbus_property(self, value=None):
2047
1050
if value is None: # get
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1051
return dbus.UInt64(self.interval_milliseconds())
2049
1052
self.interval = datetime.timedelta(0, 0, 0, value)
2050
if getattr(self, "checker_initiator_tag", None) is None:
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
2051
1057
return
2052
if self.enabled:
2053
# Reschedule checker run
2054
GObject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = GObject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
2058
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
2059
1064
# Checker - property
2060
@dbus_service_property(_interface,
2061
signature="s",
2062
access="readwrite")
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
2063
1067
def Checker_dbus_property(self, value=None):
2064
1068
if value is None: # get
2065
1069
return dbus.String(self.checker_command)
2066
self.checker_command = str(value)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
2067
1075
2068
1076
# CheckerRunning - property
2069
@dbus_service_property(_interface,
2070
signature="b",
2071
access="readwrite")
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
2072
1079
def CheckerRunning_dbus_property(self, value=None):
2073
1080
if value is None: # get
2074
1081
return dbus.Boolean(self.checker is not None)
2078
1085
self.stop_checker()
2079
1086
2080
1087
# ObjectPath - property
2081
@dbus_annotations(
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
2084
@dbus_service_property(_interface, signature="o", access="read")
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
2085
1089
def ObjectPath_dbus_property(self):
2086
1090
return self.dbus_object_path # is already a dbus.ObjectPath
2087
1091
2088
1092
# Secret = property
2089
@dbus_annotations(
2090
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2091
"invalidates"})
2092
@dbus_service_property(_interface,
2093
signature="ay",
2094
access="write",
2095
byte_arrays=True)
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
2096
1095
def Secret_dbus_property(self, value):
2097
self.secret = bytes(value)
1096
self.secret = str(value)
2098
1097
2099
1098
del _interface
2100
1099
2104
1103
self._pipe = child_pipe
2105
1104
self._pipe.send(('init', fpr, address))
2106
1105
if not self._pipe.recv():
2107
raise KeyError(fpr)
2108
1106
raise KeyError()
1107
2109
1108
def __getattribute__(self, name):
2110
if name == '_pipe':
1109
if(name == '_pipe'):
2111
1110
return super(ProxyClient, self).__getattribute__(name)
2112
1111
self._pipe.send(('getattr', name))
2113
1112
data = self._pipe.recv()
2114
1113
if data[0] == 'data':
2115
1114
return data[1]
2116
1115
if data[0] == 'function':
2117
2118
1116
def func(*args, **kwargs):
2119
1117
self._pipe.send(('funcall', name, args, kwargs))
2120
1118
return self._pipe.recv()[1]
2121
2122
1119
return func
2123
1120
2124
1121
def __setattr__(self, name, value):
2125
if name == '_pipe':
1122
if(name == '_pipe'):
2126
1123
return super(ProxyClient, self).__setattr__(name, value)
2127
1124
self._pipe.send(('setattr', name, value))
2128
1125
2135
1132
2136
1133
def handle(self):
2137
1134
with contextlib.closing(self.server.child_pipe) as child_pipe:
2138
logger.info("TCP connection from: %s",
2139
str(self.client_address))
2140
logger.debug("Pipe FD: %d",
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
2141
1138
self.server.child_pipe.fileno())
2142
2143
session = gnutls.ClientSession(self.request)
2144
2145
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2146
# "+AES-256-CBC", "+SHA1",
2147
# "+COMP-NULL", "+CTYPE-OPENPGP",
2148
# "+DHE-DSS"))
1139
1140
session = (gnutls.connection
1141
.ClientSession(self.request,
1142
gnutls.connection
1143
.X509Credentials()))
1144
1145
# Note: gnutls.connection.X509Credentials is really a
1146
# generic GnuTLS certificate credentials object so long as
1147
# no X.509 keys are added to it. Therefore, we can use it
1148
# here despite using OpenPGP certificates.
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
2149
1154
# Use a fallback default, since this MUST be set.
2150
1155
priority = self.server.gnutls_priority
2151
1156
if priority is None:
2152
priority = "NORMAL"
2153
gnutls.priority_set_direct(session._c_object, priority,
2154
None)
2155
1157
priority = u"NORMAL"
1158
(gnutls.library.functions
1159
.gnutls_priority_set_direct(session._c_object,
1160
priority, None))
1161
2156
1162
# Start communication using the Mandos protocol
2157
1163
# Get protocol number
2158
1164
line = self.request.makefile().readline()
2159
logger.debug("Protocol version: %r", line)
1165
logger.debug(u"Protocol version: %r", line)
2160
1166
try:
2161
1167
if int(line.strip().split()[0]) > 1:
2162
raise RuntimeError(line)
2163
except (ValueError, IndexError, RuntimeError) as error:
2164
logger.error("Unknown protocol version: %s", error)
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
2165
1171
return
2166
1172
2167
1173
# Start GnuTLS connection
2168
1174
try:
2169
1175
session.handshake()
2170
except gnutls.Error as error:
2171
logger.warning("Handshake failed: %s", error)
1176
except gnutls.errors.GNUTLSError, error:
1177
logger.warning(u"Handshake failed: %s", error)
2172
1178
# Do not run session.bye() here: the session is not
2173
1179
# established. Just abandon the request.
2174
1180
return
2175
logger.debug("Handshake succeeded")
2176
1181
logger.debug(u"Handshake succeeded")
1182
2177
1183
approval_required = False
2178
1184
try:
2179
1185
try:
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
2183
logger.warning("Bad certificate: %s", error)
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
2184
1190
return
2185
logger.debug("Fingerprint: %s", fpr)
2186
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
2187
1193
try:
2188
1194
client = ProxyClient(child_pipe, fpr,
2189
1195
self.client_address)
2197
1203
2198
1204
while True:
2199
1205
if not client.enabled:
2200
logger.info("Client %s is disabled",
2201
client.name)
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
2202
1208
if self.server.use_dbus:
2203
1209
# Emit D-Bus signal
2204
client.Rejected("Disabled")
1210
client.Rejected("Disabled")
2205
1211
return
2206
1212
2207
if client.approved or not client.approval_delay:
1213
if client._approved or not client.approval_delay:
2208
1214
#We are approved or approval is disabled
2209
1215
break
2210
elif client.approved is None:
2211
logger.info("Client %s needs approval",
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
2212
1218
client.name)
2213
1219
if self.server.use_dbus:
2214
1220
# Emit D-Bus signal
2215
1221
client.NeedApproval(
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
2218
1224
else:
2219
logger.warning("Client %s was not approved",
1225
logger.warning(u"Client %s was not approved",
2220
1226
client.name)
2221
1227
if self.server.use_dbus:
2222
1228
# Emit D-Bus signal
2224
1230
return
2225
1231
2226
1232
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
2227
1234
time = datetime.datetime.now()
2228
1235
client.changedstate.acquire()
2229
client.changedstate.wait(delay.total_seconds())
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2230
1237
client.changedstate.release()
2231
1238
time2 = datetime.datetime.now()
2232
1239
if (time2 - time) >= delay:
2243
1250
else:
2244
1251
delay -= time2 - time
2245
1252
2246
try:
2247
session.send(client.secret)
2248
except gnutls.Error as error:
2249
logger.warning("gnutls send failed",
2250
exc_info = error)
2251
return
2252
2253
logger.info("Sending secret to %s", client.name)
2254
# bump the timeout using extended_timeout
2255
client.bump_timeout(client.extended_timeout)
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
2256
1268
if self.server.use_dbus:
2257
1269
# Emit D-Bus signal
2258
1270
client.GotSecret()
2262
1274
client.approvals_pending -= 1
2263
1275
try:
2264
1276
session.bye()
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
2267
exc_info=error)
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
2268
1279
2269
1280
@staticmethod
2270
1281
def peer_certificate(session):
2271
1282
"Return the peer's OpenPGP certificate as a bytestring"
2272
1283
# If not an OpenPGP certificate...
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
2276
return b""
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
2277
1289
list_size = ctypes.c_uint(1)
2278
cert_list = (gnutls.certificate_get_peers
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
2279
1292
(session._c_object, ctypes.byref(list_size)))
2280
1293
if not bool(cert_list) and list_size.value != 0:
2281
raise gnutls.Error("error getting peer certificate")
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
2282
1296
if list_size.value == 0:
2283
1297
return None
2284
1298
cert = cert_list[0]
2288
1302
def fingerprint(openpgp):
2289
1303
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2290
1304
# New GnuTLS "datum" with the OpenPGP public key
2291
datum = gnutls.datum_t(
2292
ctypes.cast(ctypes.c_char_p(openpgp),
2293
ctypes.POINTER(ctypes.c_ubyte)),
2294
ctypes.c_uint(len(openpgp)))
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
2295
1310
# New empty GnuTLS certificate
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2298
1314
# Import the OpenPGP public key into the certificate
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
2301
1319
# Verify the self signature in the key
2302
1320
crtverify = ctypes.c_uint()
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
2305
1324
if crtverify.value != 0:
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
2308
1328
# New buffer for the fingerprint
2309
1329
buf = ctypes.create_string_buffer(20)
2310
1330
buf_len = ctypes.c_size_t()
2311
1331
# Get the fingerprint from the certificate into the buffer
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
2314
1335
# Deinit the certificate
2315
gnutls.openpgp_crt_deinit(crt)
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2316
1337
# Convert the buffer to a Python bytestring
2317
1338
fpr = ctypes.string_at(buf, buf_len.value)
2318
1339
# Convert the bytestring to hexadecimal notation
2319
hex_fpr = binascii.hexlify(fpr).upper()
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
2320
1341
return hex_fpr
2321
1342
2322
1343
2323
1344
class MultiprocessingMixIn(object):
2324
1345
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2325
2326
1346
def sub_process_main(self, request, address):
2327
1347
try:
2328
1348
self.finish_request(request, address)
2329
except Exception:
1349
except:
2330
1350
self.handle_error(request, address)
2331
1351
self.close_request(request)
2332
1352
2333
1353
def process_request(self, request, address):
2334
1354
"""Start a new process to process the request."""
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
2337
proc.start()
2338
return proc
2339
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
2340
1357
2341
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2342
1359
""" adds a pipe to the MixIn """
2343
2344
1360
def process_request(self, request, client_address):
2345
1361
"""Overrides and wraps the original process_request().
2346
1362
2347
1363
This function creates a new pipe in self.pipe
2348
1364
"""
2349
1365
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2350
2351
proc = MultiprocessingMixIn.process_request(self, request,
2352
client_address)
1366
1367
super(MultiprocessingMixInWithPipe,
1368
self).process_request(request, client_address)
2353
1369
self.child_pipe.close()
2354
self.add_pipe(parent_pipe, proc)
2355
2356
def add_pipe(self, parent_pipe, proc):
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
2357
1373
"""Dummy function; override as necessary"""
2358
raise NotImplementedError()
2359
1374
pass
2360
1375
2361
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2362
1377
socketserver.TCPServer, object):
2367
1382
interface: None or a network interface name (string)
2368
1383
use_ipv6: Boolean; to use IPv6 or not
2369
1384
"""
2370
2371
1385
def __init__(self, server_address, RequestHandlerClass,
2372
interface=None,
2373
use_ipv6=True,
2374
socketfd=None):
2375
"""If socketfd is set, use that file descriptor instead of
2376
creating a new one with socket.socket().
2377
"""
1386
interface=None, use_ipv6=True):
2378
1387
self.interface = interface
2379
1388
if use_ipv6:
2380
1389
self.address_family = socket.AF_INET6
2381
if socketfd is not None:
2382
# Save the file descriptor
2383
self.socketfd = socketfd
2384
# Save the original socket.socket() function
2385
self.socket_socket = socket.socket
2386
# To implement --socket, we monkey patch socket.socket.
2387
#
2388
# (When socketserver.TCPServer is a new-style class, we
2389
# could make self.socket into a property instead of monkey
2390
# patching socket.socket.)
2391
#
2392
# Create a one-time-only replacement for socket.socket()
2393
@functools.wraps(socket.socket)
2394
def socket_wrapper(*args, **kwargs):
2395
# Restore original function so subsequent calls are
2396
# not affected.
2397
socket.socket = self.socket_socket
2398
del self.socket_socket
2399
# This time only, return a new socket object from the
2400
# saved file descriptor.
2401
return socket.fromfd(self.socketfd, *args, **kwargs)
2402
# Replace socket.socket() function with wrapper
2403
socket.socket = socket_wrapper
2404
# The socketserver.TCPServer.__init__ will call
2405
# socket.socket(), which might be our replacement,
2406
# socket_wrapper(), if socketfd was set.
2407
1390
socketserver.TCPServer.__init__(self, server_address,
2408
1391
RequestHandlerClass)
2409
2410
1392
def server_bind(self):
2411
1393
"""This overrides the normal server_bind() function
2412
1394
to bind to an interface if one was specified, and also NOT to
2413
1395
bind to an address or port if they were not specified."""
2414
1396
if self.interface is not None:
2415
1397
if SO_BINDTODEVICE is None:
2416
logger.error("SO_BINDTODEVICE does not exist;"
2417
" cannot bind to interface %s",
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
2418
1400
self.interface)
2419
1401
else:
2420
1402
try:
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
2424
except socket.error as error:
2425
if error.errno == errno.EPERM:
2426
logger.error("No permission to bind to"
2427
" interface %s", self.interface)
2428
elif error.errno == errno.ENOPROTOOPT:
2429
logger.error("SO_BINDTODEVICE not available;"
2430
" cannot bind to interface %s",
2431
self.interface)
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
2435
1416
else:
2436
1417
raise
2437
1418
# Only bind(2) the socket if we really need to.
2438
1419
if self.server_address[0] or self.server_address[1]:
2439
1420
if not self.server_address[0]:
2440
1421
if self.address_family == socket.AF_INET6:
2441
any_address = "::" # in6addr_any
1422
any_address = u"::" # in6addr_any
2442
1423
else:
2443
any_address = "0.0.0.0" # INADDR_ANY
1424
any_address = socket.INADDR_ANY
2444
1425
self.server_address = (any_address,
2445
1426
self.server_address[1])
2446
1427
elif not self.server_address[1]:
2447
self.server_address = (self.server_address[0], 0)
1428
self.server_address = (self.server_address[0],
1429
0)
2448
1430
# if self.interface:
2449
1431
# self.server_address = (self.server_address[0],
2450
1432
# 0, # port
2462
1444
gnutls_priority GnuTLS priority string
2463
1445
use_dbus: Boolean; to emit D-Bus signals or not
2464
1446
2465
Assumes a GObject.MainLoop event loop.
1447
Assumes a gobject.MainLoop event loop.
2466
1448
"""
2467
2468
1449
def __init__(self, server_address, RequestHandlerClass,
2469
interface=None,
2470
use_ipv6=True,
2471
clients=None,
2472
gnutls_priority=None,
2473
use_dbus=True,
2474
socketfd=None):
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
2475
1452
self.enabled = False
2476
1453
self.clients = clients
2477
1454
if self.clients is None:
2478
self.clients = {}
1455
self.clients = set()
2479
1456
self.use_dbus = use_dbus
2480
1457
self.gnutls_priority = gnutls_priority
2481
1458
IPv6_TCPServer.__init__(self, server_address,
2482
1459
RequestHandlerClass,
2483
1460
interface = interface,
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1461
use_ipv6 = use_ipv6)
2487
1462
def server_activate(self):
2488
1463
if self.enabled:
2489
1464
return socketserver.TCPServer.server_activate(self)
2490
2491
1465
def enable(self):
2492
1466
self.enabled = True
2493
2494
def add_pipe(self, parent_pipe, proc):
1467
def add_pipe(self, parent_pipe):
2495
1468
# Call "handle_ipc" for both data and EOF events
2496
GObject.io_add_watch(
2497
parent_pipe.fileno(),
2498
GObject.IO_IN | GObject.IO_HUP,
2499
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2501
proc = proc))
2502
2503
def handle_ipc(self, source, condition,
2504
parent_pipe=None,
2505
proc = None,
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
2506
1475
client_object=None):
2507
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (GObject.IO_ERR | GObject.IO_HUP):
2509
# Wait for other process to exit
2510
proc.join()
1476
condition_names = {
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
1485
}
1486
conditions_string = ' | '.join(name
1487
for cond, name in
1488
condition_names.iteritems()
1489
if cond & condition)
1490
# error or the other end of multiprocessing.Pipe has closed
1491
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2511
1492
return False
2512
1493
2513
1494
# Read a request from the child
2518
1499
fpr = request[1]
2519
1500
address = request[2]
2520
1501
2521
for c in self.clients.itervalues():
1502
for c in self.clients:
2522
1503
if c.fingerprint == fpr:
2523
1504
client = c
2524
1505
break
2525
1506
else:
2526
logger.info("Client not found for fingerprint: %s, ad"
2527
"dress: %s", fpr, address)
1507
logger.warning(u"Client not found for fingerprint: %s, ad"
1508
u"dress: %s", fpr, address)
2528
1509
if self.use_dbus:
2529
1510
# Emit D-Bus signal
2530
mandos_dbus_service.ClientNotFound(fpr,
2531
address[0])
1511
mandos_dbus_service.ClientNotFound(fpr, address)
2532
1512
parent_pipe.send(False)
2533
1513
return False
2534
1514
2535
GObject.io_add_watch(
2536
parent_pipe.fileno(),
2537
GObject.IO_IN | GObject.IO_HUP,
2538
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2540
proc = proc,
2541
client_object = client))
1515
gobject.io_add_watch(parent_pipe.fileno(),
1516
gobject.IO_IN | gobject.IO_HUP,
1517
functools.partial(self.handle_ipc,
1518
parent_pipe = parent_pipe,
1519
client_object = client))
2542
1520
parent_pipe.send(True)
2543
# remove the old hook in favor of the new above hook on
2544
# same fileno
1521
# remove the old hook in favor of the new above hook on same fileno
2545
1522
return False
2546
1523
if command == 'funcall':
2547
1524
funcname = request[1]
2548
1525
args = request[2]
2549
1526
kwargs = request[3]
2550
1527
2551
parent_pipe.send(('data', getattr(client_object,
2552
funcname)(*args,
2553
**kwargs)))
2554
1528
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1529
2555
1530
if command == 'getattr':
2556
1531
attrname = request[1]
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
1532
if callable(client_object.__getattribute__(attrname)):
1533
parent_pipe.send(('function',))
2560
1534
else:
2561
parent_pipe.send((
2562
'data', client_object.__getattribute__(attrname)))
1535
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2563
1536
2564
1537
if command == 'setattr':
2565
1538
attrname = request[1]
2566
1539
value = request[2]
2567
1540
setattr(client_object, attrname, value)
2568
1541
2569
1542
return True
2570
1543
2571
1544
2572
def rfc3339_duration_to_delta(duration):
2573
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2574
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
2589
"""
2590
2591
# Parsing an RFC 3339 duration with regular expressions is not
2592
# possible - there would have to be multiple places for the same
2593
# values, like seconds. The current code, while more esoteric, is
2594
# cleaner without depending on a parsing library. If Python had a
2595
# built-in library for parsing we would use it, but we'd like to
2596
# avoid excessive use of external libraries.
2597
2598
# New type for defining tokens, syntax, and semantics all-in-one
2599
Token = collections.namedtuple("Token", (
2600
"regexp", # To match token; if "value" is not None, must have
2601
# a "group" containing digits
2602
"value", # datetime.timedelta or None
2603
"followers")) # Tokens valid after this token
2604
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2605
# the "duration" ABNF definition in RFC 3339, Appendix A.
2606
token_end = Token(re.compile(r"$"), None, frozenset())
2607
token_second = Token(re.compile(r"(\d+)S"),
2608
datetime.timedelta(seconds=1),
2609
frozenset((token_end, )))
2610
token_minute = Token(re.compile(r"(\d+)M"),
2611
datetime.timedelta(minutes=1),
2612
frozenset((token_second, token_end)))
2613
token_hour = Token(re.compile(r"(\d+)H"),
2614
datetime.timedelta(hours=1),
2615
frozenset((token_minute, token_end)))
2616
token_time = Token(re.compile(r"T"),
2617
None,
2618
frozenset((token_hour, token_minute,
2619
token_second)))
2620
token_day = Token(re.compile(r"(\d+)D"),
2621
datetime.timedelta(days=1),
2622
frozenset((token_time, token_end)))
2623
token_month = Token(re.compile(r"(\d+)M"),
2624
datetime.timedelta(weeks=4),
2625
frozenset((token_day, token_end)))
2626
token_year = Token(re.compile(r"(\d+)Y"),
2627
datetime.timedelta(weeks=52),
2628
frozenset((token_month, token_end)))
2629
token_week = Token(re.compile(r"(\d+)W"),
2630
datetime.timedelta(weeks=1),
2631
frozenset((token_end, )))
2632
token_duration = Token(re.compile(r"P"), None,
2633
frozenset((token_year, token_month,
2634
token_day, token_time,
2635
token_week)))
2636
# Define starting values
2637
value = datetime.timedelta() # Value so far
2638
found_token = None
2639
followers = frozenset((token_duration, )) # Following valid tokens
2640
s = duration # String left to parse
2641
# Loop until end token is found
2642
while found_token is not token_end:
2643
# Search for any currently valid tokens
2644
for token in followers:
2645
match = token.regexp.match(s)
2646
if match is not None:
2647
# Token found
2648
if token.value is not None:
2649
# Value found, parse digits
2650
factor = int(match.group(1), 10)
2651
# Add to value so far
2652
value += factor * token.value
2653
# Strip token from string
2654
s = token.regexp.sub("", s, 1)
2655
# Go to found token
2656
found_token = token
2657
# Set valid next tokens
2658
followers = found_token.followers
2659
break
2660
else:
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
2663
.format(duration))
2664
# End token found
2665
return value
2666
2667
2668
1545
def string_to_delta(interval):
2669
1546
"""Parse a string and return a datetime.timedelta
2670
1547
2671
>>> string_to_delta('7d')
1548
>>> string_to_delta(u'7d')
2672
1549
datetime.timedelta(7)
2673
>>> string_to_delta('60s')
1550
>>> string_to_delta(u'60s')
2674
1551
datetime.timedelta(0, 60)
2675
>>> string_to_delta('60m')
1552
>>> string_to_delta(u'60m')
2676
1553
datetime.timedelta(0, 3600)
2677
>>> string_to_delta('24h')
1554
>>> string_to_delta(u'24h')
2678
1555
datetime.timedelta(1)
2679
>>> string_to_delta('1w')
1556
>>> string_to_delta(u'1w')
2680
1557
datetime.timedelta(7)
2681
>>> string_to_delta('5m 30s')
1558
>>> string_to_delta(u'5m 30s')
2682
1559
datetime.timedelta(0, 330)
2683
1560
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
2690
1561
timevalue = datetime.timedelta(0)
2691
1562
for s in interval.split():
2692
1563
try:
2693
suffix = s[-1]
1564
suffix = unicode(s[-1])
2694
1565
value = int(s[:-1])
2695
if suffix == "d":
1566
if suffix == u"d":
2696
1567
delta = datetime.timedelta(value)
2697
elif suffix == "s":
1568
elif suffix == u"s":
2698
1569
delta = datetime.timedelta(0, value)
2699
elif suffix == "m":
1570
elif suffix == u"m":
2700
1571
delta = datetime.timedelta(0, 0, 0, 0, value)
2701
elif suffix == "h":
1572
elif suffix == u"h":
2702
1573
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2703
elif suffix == "w":
1574
elif suffix == u"w":
2704
1575
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2705
1576
else:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
2708
raise ValueError(*(e.args))
1577
raise ValueError(u"Unknown suffix %r" % suffix)
1578
except (ValueError, IndexError), e:
1579
raise ValueError(e.message)
2709
1580
timevalue += delta
2710
1581
return timevalue
2711
1582
2712
1583
1584
def if_nametoindex(interface):
1585
"""Call the C function if_nametoindex(), or equivalent
1586
1587
Note: This function cannot accept a unicode string."""
1588
global if_nametoindex
1589
try:
1590
if_nametoindex = (ctypes.cdll.LoadLibrary
1591
(ctypes.util.find_library(u"c"))
1592
.if_nametoindex)
1593
except (OSError, AttributeError):
1594
logger.warning(u"Doing if_nametoindex the hard way")
1595
def if_nametoindex(interface):
1596
"Get an interface index the hard way, i.e. using fcntl()"
1597
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1598
with contextlib.closing(socket.socket()) as s:
1599
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1600
struct.pack(str(u"16s16x"),
1601
interface))
1602
interface_index = struct.unpack(str(u"I"),
1603
ifreq[16:20])[0]
1604
return interface_index
1605
return if_nametoindex(interface)
1606
1607
2713
1608
def daemon(nochdir = False, noclose = False):
2714
1609
"""See daemon(3). Standard BSD Unix function.
2715
1610
2718
1613
sys.exit()
2719
1614
os.setsid()
2720
1615
if not nochdir:
2721
os.chdir("/")
1616
os.chdir(u"/")
2722
1617
if os.fork():
2723
1618
sys.exit()
2724
1619
if not noclose:
2725
1620
# Close all standard open file descriptors
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1621
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2727
1622
if not stat.S_ISCHR(os.fstat(null).st_mode):
2728
1623
raise OSError(errno.ENODEV,
2729
"{} not a character device"
2730
.format(os.devnull))
1624
u"%s not a character device"
1625
% os.path.devnull)
2731
1626
os.dup2(null, sys.stdin.fileno())
2732
1627
os.dup2(null, sys.stdout.fileno())
2733
1628
os.dup2(null, sys.stderr.fileno())
2740
1635
##################################################################
2741
1636
# Parsing of options, both command line and config file
2742
1637
2743
parser = argparse.ArgumentParser()
2744
parser.add_argument("-v", "--version", action="version",
2745
version = "%(prog)s {}".format(version),
2746
help="show version number and exit")
2747
parser.add_argument("-i", "--interface", metavar="IF",
2748
help="Bind to interface IF")
2749
parser.add_argument("-a", "--address",
2750
help="Address to listen for requests on")
2751
parser.add_argument("-p", "--port", type=int,
2752
help="Port number to receive requests on")
2753
parser.add_argument("--check", action="store_true",
2754
help="Run self-test")
2755
parser.add_argument("--debug", action="store_true",
2756
help="Debug mode; run in foreground and log"
2757
" to terminal", default=None)
2758
parser.add_argument("--debuglevel", metavar="LEVEL",
2759
help="Debug level for stdout output")
2760
parser.add_argument("--priority", help="GnuTLS"
2761
" priority string (see GnuTLS documentation)")
2762
parser.add_argument("--servicename",
2763
metavar="NAME", help="Zeroconf service name")
2764
parser.add_argument("--configdir",
2765
default="/etc/mandos", metavar="DIR",
2766
help="Directory to search for configuration"
2767
" files")
2768
parser.add_argument("--no-dbus", action="store_false",
2769
dest="use_dbus", help="Do not provide D-Bus"
2770
" system bus interface", default=None)
2771
parser.add_argument("--no-ipv6", action="store_false",
2772
dest="use_ipv6", help="Do not use IPv6",
2773
default=None)
2774
parser.add_argument("--no-restore", action="store_false",
2775
dest="restore", help="Do not restore stored"
2776
" state", default=None)
2777
parser.add_argument("--socket", type=int,
2778
help="Specify a file descriptor to a network"
2779
" socket to use instead of creating one")
2780
parser.add_argument("--statedir", metavar="DIR",
2781
help="Directory to save/restore state in")
2782
parser.add_argument("--foreground", action="store_true",
2783
help="Run in foreground", default=None)
2784
parser.add_argument("--no-zeroconf", action="store_false",
2785
dest="zeroconf", help="Do not use Zeroconf",
2786
default=None)
2787
2788
options = parser.parse_args()
1638
parser = optparse.OptionParser(version = "%%prog %s" % version)
1639
parser.add_option("-i", u"--interface", type=u"string",
1640
metavar="IF", help=u"Bind to interface IF")
1641
parser.add_option("-a", u"--address", type=u"string",
1642
help=u"Address to listen for requests on")
1643
parser.add_option("-p", u"--port", type=u"int",
1644
help=u"Port number to receive requests on")
1645
parser.add_option("--check", action=u"store_true",
1646
help=u"Run self-test")
1647
parser.add_option("--debug", action=u"store_true",
1648
help=u"Debug mode; run in foreground and log to"
1649
u" terminal")
1650
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1651
help=u"Debug level for stdout output")
1652
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1653
u" priority string (see GnuTLS documentation)")
1654
parser.add_option("--servicename", type=u"string",
1655
metavar=u"NAME", help=u"Zeroconf service name")
1656
parser.add_option("--configdir", type=u"string",
1657
default=u"/etc/mandos", metavar=u"DIR",
1658
help=u"Directory to search for configuration"
1659
u" files")
1660
parser.add_option("--no-dbus", action=u"store_false",
1661
dest=u"use_dbus", help=u"Do not provide D-Bus"
1662
u" system bus interface")
1663
parser.add_option("--no-ipv6", action=u"store_false",
1664
dest=u"use_ipv6", help=u"Do not use IPv6")
1665
options = parser.parse_args()[0]
2789
1666
2790
1667
if options.check:
2791
1668
import doctest
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
1669
doctest.testmod()
1670
sys.exit()
2794
1671
2795
1672
# Default values for config file for server-global settings
2796
server_defaults = { "interface": "",
2797
"address": "",
2798
"port": "",
2799
"debug": "False",
2800
"priority":
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2803
"servicename": "Mandos",
2804
"use_dbus": "True",
2805
"use_ipv6": "True",
2806
"debuglevel": "",
2807
"restore": "True",
2808
"socket": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2811
"zeroconf": "True",
2812
}
1673
server_defaults = { u"interface": u"",
1674
u"address": u"",
1675
u"port": u"",
1676
u"debug": u"False",
1677
u"priority":
1678
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1679
u"servicename": u"Mandos",
1680
u"use_dbus": u"True",
1681
u"use_ipv6": u"True",
1682
u"debuglevel": u"",
1683
}
2813
1684
2814
1685
# Parse config file for server-global settings
2815
1686
server_config = configparser.SafeConfigParser(server_defaults)
2816
1687
del server_defaults
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1688
server_config.read(os.path.join(options.configdir,
1689
u"mandos.conf"))
2818
1690
# Convert the SafeConfigParser object to a dict
2819
1691
server_settings = server_config.defaults()
2820
1692
# Use the appropriate methods on the non-string config options
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2822
server_settings[option] = server_config.getboolean("DEFAULT",
1693
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1694
server_settings[option] = server_config.getboolean(u"DEFAULT",
2823
1695
option)
2824
1696
if server_settings["port"]:
2825
server_settings["port"] = server_config.getint("DEFAULT",
2826
"port")
2827
if server_settings["socket"]:
2828
server_settings["socket"] = server_config.getint("DEFAULT",
2829
"socket")
2830
# Later, stdin will, and stdout and stderr might, be dup'ed
2831
# over with an opened os.devnull. But we don't want this to
2832
# happen with a supplied network socket.
2833
if 0 <= server_settings["socket"] <= 2:
2834
server_settings["socket"] = os.dup(server_settings
2835
["socket"])
1697
server_settings["port"] = server_config.getint(u"DEFAULT",
1698
u"port")
2836
1699
del server_config
2837
1700
2838
1701
# Override the settings from the config file with command line
2839
1702
# options, if set.
2840
for option in ("interface", "address", "port", "debug",
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
1703
for option in (u"interface", u"address", u"port", u"debug",
1704
u"priority", u"servicename", u"configdir",
1705
u"use_dbus", u"use_ipv6", u"debuglevel"):
2844
1706
value = getattr(options, option)
2845
1707
if value is not None:
2846
1708
server_settings[option] = value
2847
1709
del options
2848
1710
# Force all strings to be unicode
2849
1711
for option in server_settings.keys():
2850
if isinstance(server_settings[option], bytes):
2851
server_settings[option] = (server_settings[option]
2852
.decode("utf-8"))
2853
# Force all boolean options to be boolean
2854
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2855
"foreground", "zeroconf"):
2856
server_settings[option] = bool(server_settings[option])
2857
# Debug implies foreground
2858
if server_settings["debug"]:
2859
server_settings["foreground"] = True
1712
if type(server_settings[option]) is str:
1713
server_settings[option] = unicode(server_settings[option])
2860
1714
# Now we have our good server settings in "server_settings"
2861
1715
2862
1716
##################################################################
2863
1717
2864
if (not server_settings["zeroconf"]
2865
and not (server_settings["port"]
2866
or server_settings["socket"] != "")):
2867
parser.error("Needs port or socket to work without Zeroconf")
2868
2869
1718
# For convenience
2870
debug = server_settings["debug"]
2871
debuglevel = server_settings["debuglevel"]
2872
use_dbus = server_settings["use_dbus"]
2873
use_ipv6 = server_settings["use_ipv6"]
2874
stored_state_path = os.path.join(server_settings["statedir"],
2875
stored_state_file)
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2878
2879
if debug:
2880
initlogger(debug, logging.DEBUG)
2881
else:
2882
if not debuglevel:
2883
initlogger(debug)
2884
else:
2885
level = getattr(logging, debuglevel.upper())
2886
initlogger(debug, level)
2887
2888
if server_settings["servicename"] != "Mandos":
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
1719
debug = server_settings[u"debug"]
1720
debuglevel = server_settings[u"debuglevel"]
1721
use_dbus = server_settings[u"use_dbus"]
1722
use_ipv6 = server_settings[u"use_ipv6"]
1723
1724
if server_settings[u"servicename"] != u"Mandos":
1725
syslogger.setFormatter(logging.Formatter
1726
(u'Mandos (%s) [%%(process)d]:'
1727
u' %%(levelname)s: %%(message)s'
1728
% server_settings[u"servicename"]))
2893
1729
2894
1730
# Parse config file with clients
2895
client_config = configparser.SafeConfigParser(Client
2896
.client_defaults)
2897
client_config.read(os.path.join(server_settings["configdir"],
2898
"clients.conf"))
1731
client_defaults = { u"timeout": u"1h",
1732
u"interval": u"5m",
1733
u"checker": u"fping -q -- %%(host)s",
1734
u"host": u"",
1735
u"approval_delay": u"0s",
1736
u"approval_duration": u"1s",
1737
}
1738
client_config = configparser.SafeConfigParser(client_defaults)
1739
client_config.read(os.path.join(server_settings[u"configdir"],
1740
u"clients.conf"))
2899
1741
2900
1742
global mandos_dbus_service
2901
1743
mandos_dbus_service = None
2902
1744
2903
socketfd = None
2904
if server_settings["socket"] != "":
2905
socketfd = server_settings["socket"]
2906
tcp_server = MandosServer(
2907
(server_settings["address"], server_settings["port"]),
2908
ClientHandler,
2909
interface=(server_settings["interface"] or None),
2910
use_ipv6=use_ipv6,
2911
gnutls_priority=server_settings["priority"],
2912
use_dbus=use_dbus,
2913
socketfd=socketfd)
2914
if not foreground:
2915
pidfilename = "/run/mandos.pid"
2916
if not os.path.isdir("/run/."):
2917
pidfilename = "/var/run/mandos.pid"
2918
pidfile = None
2919
try:
2920
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2921
except IOError as e:
2922
logger.error("Could not open file %r", pidfilename,
2923
exc_info=e)
1745
tcp_server = MandosServer((server_settings[u"address"],
1746
server_settings[u"port"]),
1747
ClientHandler,
1748
interface=(server_settings[u"interface"]
1749
or None),
1750
use_ipv6=use_ipv6,
1751
gnutls_priority=
1752
server_settings[u"priority"],
1753
use_dbus=use_dbus)
1754
pidfilename = u"/var/run/mandos.pid"
1755
try:
1756
pidfile = open(pidfilename, u"w")
1757
except IOError:
1758
logger.error(u"Could not open file %r", pidfilename)
2924
1759
2925
for name, group in (("_mandos", "_mandos"),
2926
("mandos", "mandos"),
2927
("nobody", "nogroup")):
1760
try:
1761
uid = pwd.getpwnam(u"_mandos").pw_uid
1762
gid = pwd.getpwnam(u"_mandos").pw_gid
1763
except KeyError:
2928
1764
try:
2929
uid = pwd.getpwnam(name).pw_uid
2930
gid = pwd.getpwnam(group).pw_gid
2931
break
1765
uid = pwd.getpwnam(u"mandos").pw_uid
1766
gid = pwd.getpwnam(u"mandos").pw_gid
2932
1767
except KeyError:
2933
continue
2934
else:
2935
uid = 65534
2936
gid = 65534
1768
try:
1769
uid = pwd.getpwnam(u"nobody").pw_uid
1770
gid = pwd.getpwnam(u"nobody").pw_gid
1771
except KeyError:
1772
uid = 65534
1773
gid = 65534
2937
1774
try:
2938
1775
os.setgid(gid)
2939
1776
os.setuid(uid)
2940
except OSError as error:
2941
if error.errno != errno.EPERM:
2942
raise
1777
except OSError, error:
1778
if error[0] != errno.EPERM:
1779
raise error
2943
1780
1781
if not debug and not debuglevel:
1782
syslogger.setLevel(logging.WARNING)
1783
console.setLevel(logging.WARNING)
1784
if debuglevel:
1785
level = getattr(logging, debuglevel.upper())
1786
syslogger.setLevel(level)
1787
console.setLevel(level)
1788
2944
1789
if debug:
2945
1790
# Enable all possible GnuTLS debugging
2946
1791
2947
1792
# "Use a log level over 10 to enable all debugging options."
2948
1793
# - GnuTLS manual
2949
gnutls.global_set_log_level(11)
1794
gnutls.library.functions.gnutls_global_set_log_level(11)
2950
1795
2951
@gnutls.log_func
1796
@gnutls.library.types.gnutls_log_func
2952
1797
def debug_gnutls(level, string):
2953
logger.debug("GnuTLS: %s", string[:-1])
1798
logger.debug(u"GnuTLS: %s", string[:-1])
2954
1799
2955
gnutls.global_set_log_function(debug_gnutls)
1800
(gnutls.library.functions
1801
.gnutls_global_set_log_function(debug_gnutls))
2956
1802
2957
1803
# Redirect stdin so all checkers get /dev/null
2958
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1804
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2959
1805
os.dup2(null, sys.stdin.fileno())
2960
1806
if null > 2:
2961
1807
os.close(null)
2962
2963
# Need to fork before connecting to D-Bus
2964
if not foreground:
2965
# Close all input and output, do double fork, etc.
2966
daemon()
2967
2968
# multiprocessing will use threads, so before we use GObject we
2969
# need to inform GObject that threads will be used.
2970
GObject.threads_init()
1808
else:
1809
# No console logging
1810
logger.removeHandler(console)
1811
2971
1812
2972
1813
global main_loop
2973
1814
# From the Avahi example code
2974
DBusGMainLoop(set_as_default=True)
2975
main_loop = GObject.MainLoop()
1815
DBusGMainLoop(set_as_default=True )
1816
main_loop = gobject.MainLoop()
2976
1817
bus = dbus.SystemBus()
2977
1818
# End of Avahi example code
2978
1819
if use_dbus:
2979
1820
try:
2980
bus_name = dbus.service.BusName("se.recompile.Mandos",
2981
bus,
2982
do_not_queue=True)
2983
old_bus_name = dbus.service.BusName(
2984
"se.bsnet.fukt.Mandos", bus,
2985
do_not_queue=True)
2986
except dbus.exceptions.DBusException as e:
2987
logger.error("Disabling D-Bus:", exc_info=e)
1821
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1822
bus, do_not_queue=True)
1823
except dbus.exceptions.NameExistsException, e:
1824
logger.error(unicode(e) + u", disabling D-Bus")
2988
1825
use_dbus = False
2989
server_settings["use_dbus"] = False
1826
server_settings[u"use_dbus"] = False
2990
1827
tcp_server.use_dbus = False
2991
if zeroconf:
2992
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2993
service = AvahiServiceToSyslog(
2994
name = server_settings["servicename"],
2995
servicetype = "_mandos._tcp",
2996
protocol = protocol,
2997
bus = bus)
2998
if server_settings["interface"]:
2999
service.interface = if_nametoindex(
3000
server_settings["interface"].encode("utf-8"))
3001
1828
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1829
service = AvahiService(name = server_settings[u"servicename"],
1830
servicetype = u"_mandos._tcp",
1831
protocol = protocol, bus = bus)
1832
if server_settings["interface"]:
1833
service.interface = (if_nametoindex
1834
(str(server_settings[u"interface"])))
1835
1836
if not debug:
1837
# Close all input and output, do double fork, etc.
1838
daemon()
1839
3002
1840
global multiprocessing_manager
3003
1841
multiprocessing_manager = multiprocessing.Manager()
3004
1842
3005
1843
client_class = Client
3006
1844
if use_dbus:
3007
1845
client_class = functools.partial(ClientDBus, bus = bus)
3008
3009
client_settings = Client.config_parser(client_config)
3010
old_client_settings = {}
3011
clients_data = {}
3012
3013
# This is used to redirect stdout and stderr for checker processes
3014
global wnull
3015
wnull = open(os.devnull, "w") # A writable /dev/null
3016
# Only used if server is running in foreground but not in debug
3017
# mode
3018
if debug or not foreground:
3019
wnull.close()
3020
3021
# Get client data and settings from last running state.
3022
if server_settings["restore"]:
3023
try:
3024
with open(stored_state_path, "rb") as stored_state:
3025
clients_data, old_client_settings = pickle.load(
3026
stored_state)
3027
os.remove(stored_state_path)
3028
except IOError as e:
3029
if e.errno == errno.ENOENT:
3030
logger.warning("Could not load persistent state:"
3031
" {}".format(os.strerror(e.errno)))
3032
else:
3033
logger.critical("Could not load persistent state:",
3034
exc_info=e)
3035
raise
3036
except EOFError as e:
3037
logger.warning("Could not load persistent state: "
3038
"EOFError:",
3039
exc_info=e)
3040
3041
with PGPEngine() as pgp:
3042
for client_name, client in clients_data.items():
3043
# Skip removed clients
3044
if client_name not in client_settings:
3045
continue
3046
3047
# Decide which value to use after restoring saved state.
3048
# We have three different values: Old config file,
3049
# new config file, and saved state.
3050
# New config value takes precedence if it differs from old
3051
# config value, otherwise use saved state.
3052
for name, value in client_settings[client_name].items():
3053
try:
3054
# For each value in new config, check if it
3055
# differs from the old config value (Except for
3056
# the "secret" attribute)
3057
if (name != "secret"
3058
and (value !=
3059
old_client_settings[client_name][name])):
3060
client[name] = value
3061
except KeyError:
3062
pass
3063
3064
# Clients who has passed its expire date can still be
3065
# enabled if its last checker was successful. A Client
3066
# whose checker succeeded before we stored its state is
3067
# assumed to have successfully run all checkers during
3068
# downtime.
3069
if client["enabled"]:
3070
if datetime.datetime.utcnow() >= client["expires"]:
3071
if not client["last_checked_ok"]:
3072
logger.warning(
3073
"disabling client {} - Client never "
3074
"performed a successful checker".format(
3075
client_name))
3076
client["enabled"] = False
3077
elif client["last_checker_status"] != 0:
3078
logger.warning(
3079
"disabling client {} - Client last"
3080
" checker failed with error code"
3081
" {}".format(
3082
client_name,
3083
client["last_checker_status"]))
3084
client["enabled"] = False
3085
else:
3086
client["expires"] = (
3087
datetime.datetime.utcnow()
3088
+ client["timeout"])
3089
logger.debug("Last checker succeeded,"
3090
" keeping {} enabled".format(
3091
client_name))
1846
def client_config_items(config, section):
1847
special_settings = {
1848
"approved_by_default":
1849
lambda: config.getboolean(section,
1850
"approved_by_default"),
1851
}
1852
for name, value in config.items(section):
3092
1853
try:
3093
client["secret"] = pgp.decrypt(
3094
client["encrypted_secret"],
3095
client_settings[client_name]["secret"])
3096
except PGPError:
3097
# If decryption fails, we use secret from new settings
3098
logger.debug("Failed to decrypt {} old secret".format(
3099
client_name))
3100
client["secret"] = (client_settings[client_name]
3101
["secret"])
3102
3103
# Add/remove clients based on new changes made to config
3104
for client_name in (set(old_client_settings)
3105
- set(client_settings)):
3106
del clients_data[client_name]
3107
for client_name in (set(client_settings)
3108
- set(old_client_settings)):
3109
clients_data[client_name] = client_settings[client_name]
3110
3111
# Create all client objects
3112
for client_name, client in clients_data.items():
3113
tcp_server.clients[client_name] = client_class(
3114
name = client_name,
3115
settings = client,
3116
server_settings = server_settings)
3117
1854
yield (name, special_settings[name]())
1855
except KeyError:
1856
yield (name, value)
1857
1858
tcp_server.clients.update(set(
1859
client_class(name = section,
1860
config= dict(client_config_items(
1861
client_config, section)))
1862
for section in client_config.sections()))
3118
1863
if not tcp_server.clients:
3119
logger.warning("No clients defined")
3120
3121
if not foreground:
3122
if pidfile is not None:
1864
logger.warning(u"No clients defined")
1865
1866
try:
1867
with pidfile:
3123
1868
pid = os.getpid()
3124
try:
3125
with pidfile:
3126
print(pid, file=pidfile)
3127
except IOError:
3128
logger.error("Could not write to file %r with PID %d",
3129
pidfilename, pid)
1869
pidfile.write(str(pid) + "\n")
3130
1870
del pidfile
3131
del pidfilename
1871
except IOError:
1872
logger.error(u"Could not write to file %r with PID %d",
1873
pidfilename, pid)
1874
except NameError:
1875
# "pidfile" was never created
1876
pass
1877
del pidfilename
3132
1878
1879
if not debug:
1880
signal.signal(signal.SIGINT, signal.SIG_IGN)
3133
1881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3134
1882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3135
1883
3136
1884
if use_dbus:
3137
3138
@alternate_dbus_interfaces(
3139
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3140
class MandosDBusService(DBusObjectWithObjectManager):
1885
class MandosDBusService(dbus.service.Object):
3141
1886
"""A D-Bus proxy object"""
3142
3143
1887
def __init__(self):
3144
dbus.service.Object.__init__(self, bus, "/")
3145
3146
_interface = "se.recompile.Mandos"
3147
3148
@dbus.service.signal(_interface, signature="o")
1888
dbus.service.Object.__init__(self, bus, u"/")
1889
_interface = u"se.bsnet.fukt.Mandos"
1890
1891
@dbus.service.signal(_interface, signature=u"o")
3149
1892
def ClientAdded(self, objpath):
3150
1893
"D-Bus signal"
3151
1894
pass
3152
1895
3153
@dbus.service.signal(_interface, signature="ss")
1896
@dbus.service.signal(_interface, signature=u"ss")
3154
1897
def ClientNotFound(self, fingerprint, address):
3155
1898
"D-Bus signal"
3156
1899
pass
3157
1900
3158
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3159
"true"})
3160
@dbus.service.signal(_interface, signature="os")
1901
@dbus.service.signal(_interface, signature=u"os")
3161
1902
def ClientRemoved(self, objpath, name):
3162
1903
"D-Bus signal"
3163
1904
pass
3164
1905
3165
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3166
"true"})
3167
@dbus.service.method(_interface, out_signature="ao")
1906
@dbus.service.method(_interface, out_signature=u"ao")
3168
1907
def GetAllClients(self):
3169
1908
"D-Bus method"
3170
return dbus.Array(c.dbus_object_path for c in
3171
tcp_server.clients.itervalues())
1909
return dbus.Array(c.dbus_object_path
1910
for c in tcp_server.clients)
3172
1911
3173
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3174
"true"})
3175
1912
@dbus.service.method(_interface,
3176
out_signature="a{oa{sv}}")
1913
out_signature=u"a{oa{sv}}")
3177
1914
def GetAllClientsWithProperties(self):
3178
1915
"D-Bus method"
3179
1916
return dbus.Dictionary(
3180
{ c.dbus_object_path: c.GetAll(
3181
"se.recompile.Mandos.Client")
3182
for c in tcp_server.clients.itervalues() },
3183
signature="oa{sv}")
1917
((c.dbus_object_path, c.GetAll(u""))
1918
for c in tcp_server.clients),
1919
signature=u"oa{sv}")
3184
1920
3185
@dbus.service.method(_interface, in_signature="o")
1921
@dbus.service.method(_interface, in_signature=u"o")
3186
1922
def RemoveClient(self, object_path):
3187
1923
"D-Bus method"
3188
for c in tcp_server.clients.itervalues():
1924
for c in tcp_server.clients:
3189
1925
if c.dbus_object_path == object_path:
3190
del tcp_server.clients[c.name]
1926
tcp_server.clients.remove(c)
3191
1927
c.remove_from_connection()
3192
# Don't signal the disabling
1928
# Don't signal anything except ClientRemoved
3193
1929
c.disable(quiet=True)
3194
# Emit D-Bus signal for removal
3195
self.client_removed_signal(c)
1930
# Emit D-Bus signal
1931
self.ClientRemoved(object_path, c.name)
3196
1932
return
3197
1933
raise KeyError(object_path)
3198
1934
3199
1935
del _interface
3200
3201
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3202
out_signature = "a{oa{sa{sv}}}")
3203
def GetManagedObjects(self):
3204
"""D-Bus method"""
3205
return dbus.Dictionary(
3206
{ client.dbus_object_path:
3207
dbus.Dictionary(
3208
{ interface: client.GetAll(interface)
3209
for interface in
3210
client._get_all_interface_names()})
3211
for client in tcp_server.clients.values()})
3212
3213
def client_added_signal(self, client):
3214
"""Send the new standard signal and the old signal"""
3215
if use_dbus:
3216
# New standard signal
3217
self.InterfacesAdded(
3218
client.dbus_object_path,
3219
dbus.Dictionary(
3220
{ interface: client.GetAll(interface)
3221
for interface in
3222
client._get_all_interface_names()}))
3223
# Old signal
3224
self.ClientAdded(client.dbus_object_path)
3225
3226
def client_removed_signal(self, client):
3227
"""Send the new standard signal and the old signal"""
3228
if use_dbus:
3229
# New standard signal
3230
self.InterfacesRemoved(
3231
client.dbus_object_path,
3232
client._get_all_interface_names())
3233
# Old signal
3234
self.ClientRemoved(client.dbus_object_path,
3235
client.name)
3236
1936
3237
1937
mandos_dbus_service = MandosDBusService()
3238
1938
3239
1939
def cleanup():
3240
1940
"Cleanup function; run on exit"
3241
if zeroconf:
3242
service.cleanup()
3243
3244
multiprocessing.active_children()
3245
wnull.close()
3246
if not (tcp_server.clients or client_settings):
3247
return
3248
3249
# Store client before exiting. Secrets are encrypted with key
3250
# based on what config file has. If config file is
3251
# removed/edited, old secret will thus be unrecovable.
3252
clients = {}
3253
with PGPEngine() as pgp:
3254
for client in tcp_server.clients.itervalues():
3255
key = client_settings[client.name]["secret"]
3256
client.encrypted_secret = pgp.encrypt(client.secret,
3257
key)
3258
client_dict = {}
3259
3260
# A list of attributes that can not be pickled
3261
# + secret.
3262
exclude = { "bus", "changedstate", "secret",
3263
"checker", "server_settings" }
3264
for name, typ in inspect.getmembers(dbus.service
3265
.Object):
3266
exclude.add(name)
3267
3268
client_dict["encrypted_secret"] = (client
3269
.encrypted_secret)
3270
for attr in client.client_structure:
3271
if attr not in exclude:
3272
client_dict[attr] = getattr(client, attr)
3273
3274
clients[client.name] = client_dict
3275
del client_settings[client.name]["secret"]
3276
3277
try:
3278
with tempfile.NamedTemporaryFile(
3279
mode='wb',
3280
suffix=".pickle",
3281
prefix='clients-',
3282
dir=os.path.dirname(stored_state_path),
3283
delete=False) as stored_state:
3284
pickle.dump((clients, client_settings), stored_state)
3285
tempname = stored_state.name
3286
os.rename(tempname, stored_state_path)
3287
except (IOError, OSError) as e:
3288
if not debug:
3289
try:
3290
os.remove(tempname)
3291
except NameError:
3292
pass
3293
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3294
logger.warning("Could not save persistent state: {}"
3295
.format(os.strerror(e.errno)))
3296
else:
3297
logger.warning("Could not save persistent state:",
3298
exc_info=e)
3299
raise
3300
3301
# Delete all clients, and settings from config
1941
service.cleanup()
1942
3302
1943
while tcp_server.clients:
3303
name, client = tcp_server.clients.popitem()
1944
client = tcp_server.clients.pop()
3304
1945
if use_dbus:
3305
1946
client.remove_from_connection()
3306
# Don't signal the disabling
1947
client.disable_hook = None
1948
# Don't signal anything except ClientRemoved
3307
1949
client.disable(quiet=True)
3308
# Emit D-Bus signal for removal
3309
1950
if use_dbus:
3310
mandos_dbus_service.client_removed_signal(client)
3311
client_settings.clear()
1951
# Emit D-Bus signal
1952
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1953
client.name)
3312
1954
3313
1955
atexit.register(cleanup)
3314
1956
3315
for client in tcp_server.clients.itervalues():
1957
for client in tcp_server.clients:
3316
1958
if use_dbus:
3317
# Emit D-Bus signal for adding
3318
mandos_dbus_service.client_added_signal(client)
3319
# Need to initiate checking of clients
3320
if client.enabled:
3321
client.init_checker()
1959
# Emit D-Bus signal
1960
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1961
client.enable()
3322
1962
3323
1963
tcp_server.enable()
3324
1964
tcp_server.server_activate()
3325
1965
3326
1966
# Find out what port we got
3327
if zeroconf:
3328
service.port = tcp_server.socket.getsockname()[1]
1967
service.port = tcp_server.socket.getsockname()[1]
3329
1968
if use_ipv6:
3330
logger.info("Now listening on address %r, port %d,"
3331
" flowinfo %d, scope_id %d",
3332
*tcp_server.socket.getsockname())
1969
logger.info(u"Now listening on address %r, port %d,"
1970
" flowinfo %d, scope_id %d"
1971
% tcp_server.socket.getsockname())
3333
1972
else: # IPv4
3334
logger.info("Now listening on address %r, port %d",
3335
*tcp_server.socket.getsockname())
1973
logger.info(u"Now listening on address %r, port %d"
1974
% tcp_server.socket.getsockname())
3336
1975
3337
1976
#service.interface = tcp_server.socket.getsockname()[3]
3338
1977
3339
1978
try:
3340
if zeroconf:
3341
# From the Avahi example code
3342
try:
3343
service.activate()
3344
except dbus.exceptions.DBusException as error:
3345
logger.critical("D-Bus Exception", exc_info=error)
3346
cleanup()
3347
sys.exit(1)
3348
# End of Avahi example code
1979
# From the Avahi example code
1980
try:
1981
service.activate()
1982
except dbus.exceptions.DBusException, error:
1983
logger.critical(u"DBusException: %s", error)
1984
cleanup()
1985
sys.exit(1)
1986
# End of Avahi example code
3349
1987
3350
GObject.io_add_watch(tcp_server.fileno(), GObject.IO_IN,
1988
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3351
1989
lambda *args, **kwargs:
3352
1990
(tcp_server.handle_request
3353
1991
(*args[2:], **kwargs) or True))
3354
1992
3355
logger.debug("Starting main loop")
1993
logger.debug(u"Starting main loop")
3356
1994
main_loop.run()
3357
except AvahiError as error:
3358
logger.critical("Avahi Error", exc_info=error)
1995
except AvahiError, error:
1996
logger.critical(u"AvahiError: %s", error)
3359
1997
cleanup()
3360
1998
sys.exit(1)
3361
1999
except KeyboardInterrupt:
3362
2000
if debug:
3363
print("", file=sys.stderr)
3364
logger.debug("Server received KeyboardInterrupt")
3365
logger.debug("Server exiting")
2001
print >> sys.stderr
2002
logger.debug(u"Server received KeyboardInterrupt")
2003
logger.debug(u"Server exiting")
3366
2004
# Must run before the D-Bus bus name gets deregistered
3367
2005
cleanup()
3368
2006
3369
3370
2007
if __name__ == '__main__':
3371
2008
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0