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- Committer: Teddy Hogeborn
- Date: 2016-08-25 17:37:05 UTC
- Revision ID: teddy@recompile.se-20160825173705-q2v6lban8ph9uw75
PEP8 compliance: mandos
* mandos: Add PEP8 compliance (as per the "pycodestyle" tool).
* mandos: Add PEP8 compliance (as per the "pycodestyle" tool).
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
16
#
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
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
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
30
#
31
31
# Contact the authors at <mandos@recompile.se>.
32
#
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
38
41
39
import SocketServer as socketserver
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
40
46
import socket
41
47
import argparse
42
48
import datetime
43
49
import errno
44
import gnutls.crypto
45
import gnutls.connection
46
import gnutls.errors
47
import gnutls.library.functions
48
import gnutls.library.constants
49
import gnutls.library.types
50
import ConfigParser as configparser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
51
54
import sys
52
55
import re
53
56
import os
62
65
import struct
63
66
import fcntl
64
67
import functools
65
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
66
72
import multiprocessing
67
73
import types
68
74
import binascii
69
75
import tempfile
70
76
import itertools
71
77
import collections
78
import codecs
72
79
73
80
import dbus
74
81
import dbus.service
75
import gobject
76
import avahi
82
from gi.repository import GLib
77
83
from dbus.mainloop.glib import DBusGMainLoop
78
84
import ctypes
79
85
import ctypes.util
80
86
import xml.dom.minidom
81
87
import inspect
82
88
89
# Try to find the value of SO_BINDTODEVICE:
83
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
84
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
94
except AttributeError:
86
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
87
98
from IN import SO_BINDTODEVICE
88
99
except ImportError:
89
SO_BINDTODEVICE = None
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
90
113
91
114
if sys.version_info.major == 2:
92
115
str = unicode
93
116
94
version = "1.6.9"
117
version = "1.7.10"
95
118
stored_state_file = "clients.pickle"
96
119
97
120
logger = logging.getLogger()
98
121
syslogger = None
99
122
100
123
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
104
126
except (OSError, AttributeError):
127
105
128
def if_nametoindex(interface):
106
129
"Get an interface index the hard way, i.e. using fcntl()"
107
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
112
135
return interface_index
113
136
114
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
115
154
def initlogger(debug, level=logging.WARNING):
116
155
"""init logger and add loglevel"""
117
156
118
157
global syslogger
119
syslogger = (logging.handlers.SysLogHandler
120
(facility =
121
logging.handlers.SysLogHandler.LOG_DAEMON,
122
address = "/dev/log"))
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
123
161
syslogger.setFormatter(logging.Formatter
124
162
('Mandos [%(process)d]: %(levelname)s:'
125
163
' %(message)s'))
126
164
logger.addHandler(syslogger)
127
165
128
166
if debug:
129
167
console = logging.StreamHandler()
130
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
142
180
143
181
class PGPEngine(object):
144
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
145
184
def __init__(self):
146
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
147
197
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
198
'--homedir', self.tempdir,
149
199
'--force-mdc',
150
'--quiet',
151
'--no-use-agent']
152
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
153
205
def __enter__(self):
154
206
return self
155
207
156
208
def __exit__(self, exc_type, exc_value, traceback):
157
209
self._cleanup()
158
210
return False
159
211
160
212
def __del__(self):
161
213
self._cleanup()
162
214
163
215
def _cleanup(self):
164
216
if self.tempdir is not None:
165
217
# Delete contents of tempdir
166
218
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
219
topdown=False):
168
220
for filename in files:
169
221
os.remove(os.path.join(root, filename))
170
222
for dirname in dirs:
172
224
# Remove tempdir
173
225
os.rmdir(self.tempdir)
174
226
self.tempdir = None
175
227
176
228
def password_encode(self, password):
177
229
# Passphrase can not be empty and can not contain newlines or
178
230
# NUL bytes. So we prefix it and hex encode it.
183
235
.replace(b"\n", b"\\n")
184
236
.replace(b"\0", b"\\x00"))
185
237
return encoded
186
238
187
239
def encrypt(self, data, password):
188
240
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
191
243
passfile.write(passphrase)
192
244
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
245
proc = subprocess.Popen([self.gpg, '--symmetric',
194
246
'--passphrase-file',
195
247
passfile.name]
196
248
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
201
253
if proc.returncode != 0:
202
254
raise PGPError(err)
203
255
return ciphertext
204
256
205
257
def decrypt(self, data, password):
206
258
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
209
261
passfile.write(passphrase)
210
262
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
263
proc = subprocess.Popen([self.gpg, '--decrypt',
212
264
'--passphrase-file',
213
265
passfile.name]
214
266
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
220
271
if proc.returncode != 0:
221
272
raise PGPError(err)
222
273
return decrypted_plaintext
223
274
224
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
302
225
303
class AvahiError(Exception):
226
304
def __init__(self, value, *args, **kwargs):
227
305
self.value = value
228
306
return super(AvahiError, self).__init__(value, *args,
229
307
**kwargs)
230
308
309
231
310
class AvahiServiceError(AvahiError):
232
311
pass
233
312
313
234
314
class AvahiGroupError(AvahiError):
235
315
pass
236
316
237
317
238
318
class AvahiService(object):
239
319
"""An Avahi (Zeroconf) service.
240
320
241
321
Attributes:
242
322
interface: integer; avahi.IF_UNSPEC or an interface index.
243
323
Used to optionally bind to the specified interface.
255
335
server: D-Bus Server
256
336
bus: dbus.SystemBus()
257
337
"""
258
259
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
servicetype = None, port = None, TXT = None,
261
domain = "", host = "", max_renames = 32768,
262
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
263
350
self.interface = interface
264
351
self.name = name
265
352
self.type = servicetype
274
361
self.server = None
275
362
self.bus = bus
276
363
self.entry_group_state_changed_match = None
277
278
def rename(self):
364
365
def rename(self, remove=True):
279
366
"""Derived from the Avahi example code"""
280
367
if self.rename_count >= self.max_renames:
281
368
logger.critical("No suitable Zeroconf service name found"
282
369
" after %i retries, exiting.",
283
370
self.rename_count)
284
371
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
287
375
logger.info("Changing Zeroconf service name to %r ...",
288
376
self.name)
289
self.remove()
377
if remove:
378
self.remove()
290
379
try:
291
380
self.add()
292
381
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
294
self.cleanup()
295
os._exit(1)
296
self.rename_count += 1
297
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
298
391
def remove(self):
299
392
"""Derived from the Avahi example code"""
300
393
if self.entry_group_state_changed_match is not None:
302
395
self.entry_group_state_changed_match = None
303
396
if self.group is not None:
304
397
self.group.Reset()
305
398
306
399
def add(self):
307
400
"""Derived from the Avahi example code"""
308
401
self.remove()
325
418
dbus.UInt16(self.port),
326
419
avahi.string_array_to_txt_array(self.TXT))
327
420
self.group.Commit()
328
421
329
422
def entry_group_state_changed(self, state, error):
330
423
"""Derived from the Avahi example code"""
331
424
logger.debug("Avahi entry group state change: %i", state)
332
425
333
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
334
427
logger.debug("Zeroconf service established.")
335
428
elif state == avahi.ENTRY_GROUP_COLLISION:
338
431
elif state == avahi.ENTRY_GROUP_FAILURE:
339
432
logger.critical("Avahi: Error in group state changed %s",
340
433
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
344
436
def cleanup(self):
345
437
"""Derived from the Avahi example code"""
346
438
if self.group is not None:
351
443
pass
352
444
self.group = None
353
445
self.remove()
354
446
355
447
def server_state_changed(self, state, error=None):
356
448
"""Derived from the Avahi example code"""
357
449
logger.debug("Avahi server state change: %i", state)
358
bad_states = { avahi.SERVER_INVALID:
359
"Zeroconf server invalid",
360
avahi.SERVER_REGISTERING: None,
361
avahi.SERVER_COLLISION:
362
"Zeroconf server name collision",
363
avahi.SERVER_FAILURE:
364
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
365
456
if state in bad_states:
366
457
if bad_states[state] is not None:
367
458
if error is None:
370
461
logger.error(bad_states[state] + ": %r", error)
371
462
self.cleanup()
372
463
elif state == avahi.SERVER_RUNNING:
373
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
374
476
else:
375
477
if error is None:
376
478
logger.debug("Unknown state: %r", state)
377
479
else:
378
480
logger.debug("Unknown state: %r: %r", state, error)
379
481
380
482
def activate(self):
381
483
"""Derived from the Avahi example code"""
382
484
if self.server is None:
386
488
follow_name_owner_changes=True),
387
489
avahi.DBUS_INTERFACE_SERVER)
388
490
self.server.connect_to_signal("StateChanged",
389
self.server_state_changed)
491
self.server_state_changed)
390
492
self.server_state_changed(self.server.GetState())
391
493
392
494
393
495
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
496
def rename(self, *args, **kwargs):
395
497
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
401
502
return ret
402
503
403
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
_library = ctypes.cdll.LoadLibrary(
511
ctypes.util.find_library("gnutls"))
512
_need_version = b"3.3.0"
513
514
def __init__(self):
515
# Need to use class name "GnuTLS" here, since this method is
516
# called before the assignment to the "gnutls" global variable
517
# happens.
518
if GnuTLS.check_version(self._need_version) is None:
519
raise GnuTLS.Error("Needs GnuTLS {} or later"
520
.format(self._need_version))
521
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
524
525
# Constants
526
E_SUCCESS = 0
527
E_INTERRUPTED = -52
528
E_AGAIN = -28
529
CRT_OPENPGP = 2
530
CLIENT = 2
531
SHUT_RDWR = 0
532
CRD_CERTIFICATE = 1
533
E_NO_CERTIFICATE_FOUND = -49
534
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
535
536
# Types
537
class session_int(ctypes.Structure):
538
_fields_ = []
539
session_t = ctypes.POINTER(session_int)
540
541
class certificate_credentials_st(ctypes.Structure):
542
_fields_ = []
543
certificate_credentials_t = ctypes.POINTER(
544
certificate_credentials_st)
545
certificate_type_t = ctypes.c_int
546
547
class datum_t(ctypes.Structure):
548
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
549
('size', ctypes.c_uint)]
550
551
class openpgp_crt_int(ctypes.Structure):
552
_fields_ = []
553
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
554
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
555
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
556
credentials_type_t = ctypes.c_int
557
transport_ptr_t = ctypes.c_void_p
558
close_request_t = ctypes.c_int
559
560
# Exceptions
561
class Error(Exception):
562
# We need to use the class name "GnuTLS" here, since this
563
# exception might be raised from within GnuTLS.__init__,
564
# which is called before the assignment to the "gnutls"
565
# global variable has happened.
566
def __init__(self, message=None, code=None, args=()):
567
# Default usage is by a message string, but if a return
568
# code is passed, convert it to a string with
569
# gnutls.strerror()
570
self.code = code
571
if message is None and code is not None:
572
message = GnuTLS.strerror(code)
573
return super(GnuTLS.Error, self).__init__(
574
message, *args)
575
576
class CertificateSecurityError(Error):
577
pass
578
579
# Classes
580
class Credentials(object):
581
def __init__(self):
582
self._c_object = gnutls.certificate_credentials_t()
583
gnutls.certificate_allocate_credentials(
584
ctypes.byref(self._c_object))
585
self.type = gnutls.CRD_CERTIFICATE
586
587
def __del__(self):
588
gnutls.certificate_free_credentials(self._c_object)
589
590
class ClientSession(object):
591
def __init__(self, socket, credentials=None):
592
self._c_object = gnutls.session_t()
593
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
594
gnutls.set_default_priority(self._c_object)
595
gnutls.transport_set_ptr(self._c_object, socket.fileno())
596
gnutls.handshake_set_private_extensions(self._c_object,
597
True)
598
self.socket = socket
599
if credentials is None:
600
credentials = gnutls.Credentials()
601
gnutls.credentials_set(self._c_object, credentials.type,
602
ctypes.cast(credentials._c_object,
603
ctypes.c_void_p))
604
self.credentials = credentials
605
606
def __del__(self):
607
gnutls.deinit(self._c_object)
608
609
def handshake(self):
610
return gnutls.handshake(self._c_object)
611
612
def send(self, data):
613
data = bytes(data)
614
data_len = len(data)
615
while data_len > 0:
616
data_len -= gnutls.record_send(self._c_object,
617
data[-data_len:],
618
data_len)
619
620
def bye(self):
621
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
622
623
# Error handling functions
624
def _error_code(result):
625
"""A function to raise exceptions on errors, suitable
626
for the 'restype' attribute on ctypes functions"""
627
if result >= 0:
628
return result
629
if result == gnutls.E_NO_CERTIFICATE_FOUND:
630
raise gnutls.CertificateSecurityError(code=result)
631
raise gnutls.Error(code=result)
632
633
def _retry_on_error(result, func, arguments):
634
"""A function to retry on some errors, suitable
635
for the 'errcheck' attribute on ctypes functions"""
636
while result < 0:
637
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
638
return _error_code(result)
639
result = func(*arguments)
640
return result
641
642
# Unless otherwise indicated, the function declarations below are
643
# all from the gnutls/gnutls.h C header file.
644
645
# Functions
646
priority_set_direct = _library.gnutls_priority_set_direct
647
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
648
ctypes.POINTER(ctypes.c_char_p)]
649
priority_set_direct.restype = _error_code
650
651
init = _library.gnutls_init
652
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
653
init.restype = _error_code
654
655
set_default_priority = _library.gnutls_set_default_priority
656
set_default_priority.argtypes = [session_t]
657
set_default_priority.restype = _error_code
658
659
record_send = _library.gnutls_record_send
660
record_send.argtypes = [session_t, ctypes.c_void_p,
661
ctypes.c_size_t]
662
record_send.restype = ctypes.c_ssize_t
663
record_send.errcheck = _retry_on_error
664
665
certificate_allocate_credentials = (
666
_library.gnutls_certificate_allocate_credentials)
667
certificate_allocate_credentials.argtypes = [
668
ctypes.POINTER(certificate_credentials_t)]
669
certificate_allocate_credentials.restype = _error_code
670
671
certificate_free_credentials = (
672
_library.gnutls_certificate_free_credentials)
673
certificate_free_credentials.argtypes = [
674
certificate_credentials_t]
675
certificate_free_credentials.restype = None
676
677
handshake_set_private_extensions = (
678
_library.gnutls_handshake_set_private_extensions)
679
handshake_set_private_extensions.argtypes = [session_t,
680
ctypes.c_int]
681
handshake_set_private_extensions.restype = None
682
683
credentials_set = _library.gnutls_credentials_set
684
credentials_set.argtypes = [session_t, credentials_type_t,
685
ctypes.c_void_p]
686
credentials_set.restype = _error_code
687
688
strerror = _library.gnutls_strerror
689
strerror.argtypes = [ctypes.c_int]
690
strerror.restype = ctypes.c_char_p
691
692
certificate_type_get = _library.gnutls_certificate_type_get
693
certificate_type_get.argtypes = [session_t]
694
certificate_type_get.restype = _error_code
695
696
certificate_get_peers = _library.gnutls_certificate_get_peers
697
certificate_get_peers.argtypes = [session_t,
698
ctypes.POINTER(ctypes.c_uint)]
699
certificate_get_peers.restype = ctypes.POINTER(datum_t)
700
701
global_set_log_level = _library.gnutls_global_set_log_level
702
global_set_log_level.argtypes = [ctypes.c_int]
703
global_set_log_level.restype = None
704
705
global_set_log_function = _library.gnutls_global_set_log_function
706
global_set_log_function.argtypes = [log_func]
707
global_set_log_function.restype = None
708
709
deinit = _library.gnutls_deinit
710
deinit.argtypes = [session_t]
711
deinit.restype = None
712
713
handshake = _library.gnutls_handshake
714
handshake.argtypes = [session_t]
715
handshake.restype = _error_code
716
handshake.errcheck = _retry_on_error
717
718
transport_set_ptr = _library.gnutls_transport_set_ptr
719
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
720
transport_set_ptr.restype = None
721
722
bye = _library.gnutls_bye
723
bye.argtypes = [session_t, close_request_t]
724
bye.restype = _error_code
725
bye.errcheck = _retry_on_error
726
727
check_version = _library.gnutls_check_version
728
check_version.argtypes = [ctypes.c_char_p]
729
check_version.restype = ctypes.c_char_p
730
731
# All the function declarations below are from gnutls/openpgp.h
732
733
openpgp_crt_init = _library.gnutls_openpgp_crt_init
734
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
735
openpgp_crt_init.restype = _error_code
736
737
openpgp_crt_import = _library.gnutls_openpgp_crt_import
738
openpgp_crt_import.argtypes = [openpgp_crt_t,
739
ctypes.POINTER(datum_t),
740
openpgp_crt_fmt_t]
741
openpgp_crt_import.restype = _error_code
742
743
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
744
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
745
ctypes.POINTER(ctypes.c_uint)]
746
openpgp_crt_verify_self.restype = _error_code
747
748
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
749
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
750
openpgp_crt_deinit.restype = None
751
752
openpgp_crt_get_fingerprint = (
753
_library.gnutls_openpgp_crt_get_fingerprint)
754
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
755
ctypes.c_void_p,
756
ctypes.POINTER(
757
ctypes.c_size_t)]
758
openpgp_crt_get_fingerprint.restype = _error_code
759
760
# Remove non-public functions
761
del _error_code, _retry_on_error
762
# Create the global "gnutls" object, simulating a module
763
gnutls = GnuTLS()
764
765
766
def call_pipe(connection, # : multiprocessing.Connection
767
func, *args, **kwargs):
768
"""This function is meant to be called by multiprocessing.Process
769
770
This function runs func(*args, **kwargs), and writes the resulting
771
return value on the provided multiprocessing.Connection.
772
"""
773
connection.send(func(*args, **kwargs))
774
connection.close()
775
776
404
777
class Client(object):
405
778
"""A representation of a client host served by this server.
406
779
407
780
Attributes:
408
781
approved: bool(); 'None' if not yet approved/disapproved
409
782
approval_delay: datetime.timedelta(); Time to wait for approval
411
784
checker: subprocess.Popen(); a running checker process used
412
785
to see if the client lives.
413
786
'None' if no process is running.
414
checker_callback_tag: a gobject event source tag, or None
787
checker_callback_tag: a GLib event source tag, or None
415
788
checker_command: string; External command which is run to check
416
789
if client lives. %() expansions are done at
417
790
runtime with vars(self) as dict, so that for
418
791
instance %(name)s can be used in the command.
419
checker_initiator_tag: a gobject event source tag, or None
792
checker_initiator_tag: a GLib event source tag, or None
420
793
created: datetime.datetime(); (UTC) object creation
421
794
client_structure: Object describing what attributes a client has
422
795
and is used for storing the client at exit
423
796
current_checker_command: string; current running checker_command
424
disable_initiator_tag: a gobject event source tag, or None
797
disable_initiator_tag: a GLib event source tag, or None
425
798
enabled: bool()
426
799
fingerprint: string (40 or 32 hexadecimal digits); used to
427
800
uniquely identify the client
432
805
last_checker_status: integer between 0 and 255 reflecting exit
433
806
status of last checker. -1 reflects crashed
434
807
checker, -2 means no checker completed yet.
808
last_checker_signal: The signal which killed the last checker, if
809
last_checker_status is -1
435
810
last_enabled: datetime.datetime(); (UTC) or None
436
811
name: string; from the config file, used in log messages and
437
812
D-Bus identifiers
444
819
disabled, or None
445
820
server_settings: The server_settings dict from main()
446
821
"""
447
822
448
823
runtime_expansions = ("approval_delay", "approval_duration",
449
824
"created", "enabled", "expires",
450
825
"fingerprint", "host", "interval",
451
826
"last_approval_request", "last_checked_ok",
452
827
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
828
client_defaults = {
829
"timeout": "PT5M",
830
"extended_timeout": "PT15M",
831
"interval": "PT2M",
832
"checker": "fping -q -- %%(host)s",
833
"host": "",
834
"approval_delay": "PT0S",
835
"approval_duration": "PT1S",
836
"approved_by_default": "True",
837
"enabled": "True",
838
}
839
464
840
@staticmethod
465
841
def config_parser(config):
466
842
"""Construct a new dict of client settings of this form:
473
849
for client_name in config.sections():
474
850
section = dict(config.items(client_name))
475
851
client = settings[client_name] = {}
476
852
477
853
client["host"] = section["host"]
478
854
# Reformat values from string types to Python types
479
855
client["approved_by_default"] = config.getboolean(
480
856
client_name, "approved_by_default")
481
857
client["enabled"] = config.getboolean(client_name,
482
858
"enabled")
483
859
860
# Uppercase and remove spaces from fingerprint for later
861
# comparison purposes with return value from the
862
# fingerprint() function
484
863
client["fingerprint"] = (section["fingerprint"].upper()
485
864
.replace(" ", ""))
486
865
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
866
client["secret"] = codecs.decode(section["secret"]
867
.encode("utf-8"),
868
"base64")
488
869
elif "secfile" in section:
489
870
with open(os.path.expanduser(os.path.expandvars
490
871
(section["secfile"])),
505
886
client["last_approval_request"] = None
506
887
client["last_checked_ok"] = None
507
888
client["last_checker_status"] = -2
508
889
509
890
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
891
892
def __init__(self, settings, name=None, server_settings=None):
512
893
self.name = name
513
894
if server_settings is None:
514
895
server_settings = {}
516
897
# adding all client settings
517
898
for setting, value in settings.items():
518
899
setattr(self, setting, value)
519
900
520
901
if self.enabled:
521
902
if not hasattr(self, "last_enabled"):
522
903
self.last_enabled = datetime.datetime.utcnow()
526
907
else:
527
908
self.last_enabled = None
528
909
self.expires = None
529
910
530
911
logger.debug("Creating client %r", self.name)
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the fingerprint()
533
# function
534
912
logger.debug(" Fingerprint: %s", self.fingerprint)
535
913
self.created = settings.get("created",
536
914
datetime.datetime.utcnow())
537
915
538
916
# attributes specific for this server instance
539
917
self.checker = None
540
918
self.checker_initiator_tag = None
543
921
self.current_checker_command = None
544
922
self.approved = None
545
923
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
924
self.changedstate = multiprocessing_manager.Condition(
925
multiprocessing_manager.Lock())
926
self.client_structure = [attr
927
for attr in self.__dict__.keys()
551
928
if not attr.startswith("_")]
552
929
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
930
931
for name, t in inspect.getmembers(
932
type(self), lambda obj: isinstance(obj, property)):
558
933
if not name.startswith("_"):
559
934
self.client_structure.append(name)
560
935
561
936
# Send notice to process children that client state has changed
562
937
def send_changedstate(self):
563
938
with self.changedstate:
564
939
self.changedstate.notify_all()
565
940
566
941
def enable(self):
567
942
"""Start this client's checker and timeout hooks"""
568
943
if getattr(self, "enabled", False):
573
948
self.last_enabled = datetime.datetime.utcnow()
574
949
self.init_checker()
575
950
self.send_changedstate()
576
951
577
952
def disable(self, quiet=True):
578
953
"""Disable this client."""
579
954
if not getattr(self, "enabled", False):
581
956
if not quiet:
582
957
logger.info("Disabling client %s", self.name)
583
958
if getattr(self, "disable_initiator_tag", None) is not None:
584
gobject.source_remove(self.disable_initiator_tag)
959
GLib.source_remove(self.disable_initiator_tag)
585
960
self.disable_initiator_tag = None
586
961
self.expires = None
587
962
if getattr(self, "checker_initiator_tag", None) is not None:
588
gobject.source_remove(self.checker_initiator_tag)
963
GLib.source_remove(self.checker_initiator_tag)
589
964
self.checker_initiator_tag = None
590
965
self.stop_checker()
591
966
self.enabled = False
592
967
if not quiet:
593
968
self.send_changedstate()
594
# Do not run this again if called by a gobject.timeout_add
969
# Do not run this again if called by a GLib.timeout_add
595
970
return False
596
971
597
972
def __del__(self):
598
973
self.disable()
599
974
600
975
def init_checker(self):
601
976
# Schedule a new checker to be started an 'interval' from now,
602
977
# and every interval from then on.
603
978
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
979
GLib.source_remove(self.checker_initiator_tag)
980
self.checker_initiator_tag = GLib.timeout_add(
981
int(self.interval.total_seconds() * 1000),
982
self.start_checker)
609
983
# Schedule a disable() when 'timeout' has passed
610
984
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
985
GLib.source_remove(self.disable_initiator_tag)
986
self.disable_initiator_tag = GLib.timeout_add(
987
int(self.timeout.total_seconds() * 1000), self.disable)
616
988
# Also start a new checker *right now*.
617
989
self.start_checker()
618
619
def checker_callback(self, pid, condition, command):
990
991
def checker_callback(self, source, condition, connection,
992
command):
620
993
"""The checker has completed, so take appropriate actions."""
621
994
self.checker_callback_tag = None
622
995
self.checker = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
996
# Read return code from connection (see call_pipe)
997
returncode = connection.recv()
998
connection.close()
999
1000
if returncode >= 0:
1001
self.last_checker_status = returncode
1002
self.last_checker_signal = None
625
1003
if self.last_checker_status == 0:
626
1004
logger.info("Checker for %(name)s succeeded",
627
1005
vars(self))
628
1006
self.checked_ok()
629
1007
else:
630
logger.info("Checker for %(name)s failed",
631
vars(self))
1008
logger.info("Checker for %(name)s failed", vars(self))
632
1009
else:
633
1010
self.last_checker_status = -1
1011
self.last_checker_signal = -returncode
634
1012
logger.warning("Checker for %(name)s crashed?",
635
1013
vars(self))
636
1014
return False
1015
637
1016
def checked_ok(self):
638
1017
"""Assert that the client has been seen, alive and well."""
639
1018
self.last_checked_ok = datetime.datetime.utcnow()
640
1019
self.last_checker_status = 0
1020
self.last_checker_signal = None
641
1021
self.bump_timeout()
642
1022
643
1023
def bump_timeout(self, timeout=None):
644
1024
"""Bump up the timeout for this client."""
645
1025
if timeout is None:
646
1026
timeout = self.timeout
647
1027
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
1028
GLib.source_remove(self.disable_initiator_tag)
649
1029
self.disable_initiator_tag = None
650
1030
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(timeout.total_seconds() * 1000), self.disable)
654
1033
self.expires = datetime.datetime.utcnow() + timeout
655
1034
656
1035
def need_approval(self):
657
1036
self.last_approval_request = datetime.datetime.utcnow()
658
1037
659
1038
def start_checker(self):
660
1039
"""Start a new checker subprocess if one is not running.
661
1040
662
1041
If a checker already exists, leave it running and do
663
1042
nothing."""
664
1043
# The reason for not killing a running checker is that if we
669
1048
# checkers alone, the checker would have to take more time
670
1049
# than 'timeout' for the client to be disabled, which is as it
671
1050
# should be.
672
673
# If a checker exists, make sure it is not a zombie
674
try:
675
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
681
else:
682
if pid:
683
logger.warning("Checker was a zombie")
684
gobject.source_remove(self.checker_callback_tag)
685
self.checker_callback(pid, status,
686
self.current_checker_command)
1051
1052
if self.checker is not None and not self.checker.is_alive():
1053
logger.warning("Checker was not alive; joining")
1054
self.checker.join()
1055
self.checker = None
687
1056
# Start a new checker if needed
688
1057
if self.checker is None:
689
1058
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
1059
escaped_attrs = {
1060
attr: re.escape(str(getattr(self, attr)))
1061
for attr in self.runtime_expansions}
693
1062
try:
694
1063
command = self.checker_command % escaped_attrs
695
1064
except TypeError as error:
696
1065
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
1066
self.checker_command,
1067
exc_info=error)
1068
return True # Try again later
699
1069
self.current_checker_command = command
700
try:
701
logger.info("Starting checker %r for %s",
702
command, self.name)
703
# We don't need to redirect stdout and stderr, since
704
# in normal mode, that is already done by daemon(),
705
# and in debug mode we don't want to. (Stdin is
706
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
715
self.checker = subprocess.Popen(command,
716
close_fds=True,
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
try:
730
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
741
# Re-run this periodically if run by gobject.timeout_add
1070
logger.info("Starting checker %r for %s", command,
1071
self.name)
1072
# We don't need to redirect stdout and stderr, since
1073
# in normal mode, that is already done by daemon(),
1074
# and in debug mode we don't want to. (Stdin is
1075
# always replaced by /dev/null.)
1076
# The exception is when not debugging but nevertheless
1077
# running in the foreground; use the previously
1078
# created wnull.
1079
popen_args = {"close_fds": True,
1080
"shell": True,
1081
"cwd": "/"}
1082
if (not self.server_settings["debug"]
1083
and self.server_settings["foreground"]):
1084
popen_args.update({"stdout": wnull,
1085
"stderr": wnull})
1086
pipe = multiprocessing.Pipe(duplex=False)
1087
self.checker = multiprocessing.Process(
1088
target=call_pipe,
1089
args=(pipe[1], subprocess.call, command),
1090
kwargs=popen_args)
1091
self.checker.start()
1092
self.checker_callback_tag = GLib.io_add_watch(
1093
pipe[0].fileno(), GLib.IO_IN,
1094
self.checker_callback, pipe[0], command)
1095
# Re-run this periodically if run by GLib.timeout_add
742
1096
return True
743
1097
744
1098
def stop_checker(self):
745
1099
"""Force the checker process, if any, to stop."""
746
1100
if self.checker_callback_tag:
747
gobject.source_remove(self.checker_callback_tag)
1101
GLib.source_remove(self.checker_callback_tag)
748
1102
self.checker_callback_tag = None
749
1103
if getattr(self, "checker", None) is None:
750
1104
return
751
1105
logger.debug("Stopping checker for %(name)s", vars(self))
752
try:
753
self.checker.terminate()
754
#time.sleep(0.5)
755
#if self.checker.poll() is None:
756
# self.checker.kill()
757
except OSError as error:
758
if error.errno != errno.ESRCH: # No such process
759
raise
1106
self.checker.terminate()
760
1107
self.checker = None
761
1108
762
1109
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
1110
def dbus_service_property(dbus_interface,
1111
signature="v",
1112
access="readwrite",
1113
byte_arrays=False):
765
1114
"""Decorators for marking methods of a DBusObjectWithProperties to
766
1115
become properties on the D-Bus.
767
1116
768
1117
The decorated method will be called with no arguments by "Get"
769
1118
and with one argument by "Set".
770
1119
771
1120
The parameters, where they are supported, are the same as
772
1121
dbus.service.method, except there is only "signature", since the
773
1122
type from Get() and the type sent to Set() is the same.
777
1126
if byte_arrays and signature != "ay":
778
1127
raise ValueError("Byte arrays not supported for non-'ay'"
779
1128
" signature {!r}".format(signature))
1129
780
1130
def decorator(func):
781
1131
func._dbus_is_property = True
782
1132
func._dbus_interface = dbus_interface
785
1135
func._dbus_name = func.__name__
786
1136
if func._dbus_name.endswith("_dbus_property"):
787
1137
func._dbus_name = func._dbus_name[:-14]
788
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1138
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
789
1139
return func
1140
790
1141
return decorator
791
1142
792
1143
793
1144
def dbus_interface_annotations(dbus_interface):
794
1145
"""Decorator for marking functions returning interface annotations
795
1146
796
1147
Usage:
797
1148
798
1149
@dbus_interface_annotations("org.example.Interface")
799
1150
def _foo(self): # Function name does not matter
800
1151
return {"org.freedesktop.DBus.Deprecated": "true",
801
1152
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
1153
"false"}
803
1154
"""
1155
804
1156
def decorator(func):
805
1157
func._dbus_is_interface = True
806
1158
func._dbus_interface = dbus_interface
807
1159
func._dbus_name = dbus_interface
808
1160
return func
1161
809
1162
return decorator
810
1163
811
1164
812
1165
def dbus_annotations(annotations):
813
1166
"""Decorator to annotate D-Bus methods, signals or properties
814
1167
Usage:
815
1168
816
1169
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
1170
"org.freedesktop.DBus.Property."
818
1171
"EmitsChangedSignal": "false"})
820
1173
access="r")
821
1174
def Property_dbus_property(self):
822
1175
return dbus.Boolean(False)
1176
1177
See also the DBusObjectWithAnnotations class.
823
1178
"""
1179
824
1180
def decorator(func):
825
1181
func._dbus_annotations = annotations
826
1182
return func
1183
827
1184
return decorator
828
1185
829
1186
832
1189
"""
833
1190
pass
834
1191
1192
835
1193
class DBusPropertyAccessException(DBusPropertyException):
836
1194
"""A property's access permissions disallows an operation.
837
1195
"""
844
1202
pass
845
1203
846
1204
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
849
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
1205
class DBusObjectWithAnnotations(dbus.service.Object):
1206
"""A D-Bus object with annotations.
1207
1208
Classes inheriting from this can use the dbus_annotations
1209
decorator to add annotations to methods or signals.
853
1210
"""
854
1211
855
1212
@staticmethod
856
1213
def _is_dbus_thing(thing):
857
1214
"""Returns a function testing if an attribute is a D-Bus thing
858
1215
859
1216
If called like _is_dbus_thing("method") it returns a function
860
1217
suitable for use as predicate to inspect.getmembers().
861
1218
"""
862
1219
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
1220
False)
864
1221
865
1222
def _get_all_dbus_things(self, thing):
866
1223
"""Returns a generator of (name, attribute) pairs
867
1224
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
1225
return ((getattr(athing.__get__(self), "_dbus_name", name),
870
1226
athing.__get__(self))
871
1227
for cls in self.__class__.__mro__
872
1228
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
875
1229
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1230
1231
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1232
out_signature="s",
1233
path_keyword='object_path',
1234
connection_keyword='connection')
1235
def Introspect(self, object_path, connection):
1236
"""Overloading of standard D-Bus method.
1237
1238
Inserts annotation tags on methods and signals.
1239
"""
1240
xmlstring = dbus.service.Object.Introspect(self, object_path,
1241
connection)
1242
try:
1243
document = xml.dom.minidom.parseString(xmlstring)
1244
1245
for if_tag in document.getElementsByTagName("interface"):
1246
# Add annotation tags
1247
for typ in ("method", "signal"):
1248
for tag in if_tag.getElementsByTagName(typ):
1249
annots = dict()
1250
for name, prop in (self.
1251
_get_all_dbus_things(typ)):
1252
if (name == tag.getAttribute("name")
1253
and prop._dbus_interface
1254
== if_tag.getAttribute("name")):
1255
annots.update(getattr(
1256
prop, "_dbus_annotations", {}))
1257
for name, value in annots.items():
1258
ann_tag = document.createElement(
1259
"annotation")
1260
ann_tag.setAttribute("name", name)
1261
ann_tag.setAttribute("value", value)
1262
tag.appendChild(ann_tag)
1263
# Add interface annotation tags
1264
for annotation, value in dict(
1265
itertools.chain.from_iterable(
1266
annotations().items()
1267
for name, annotations
1268
in self._get_all_dbus_things("interface")
1269
if name == if_tag.getAttribute("name")
1270
)).items():
1271
ann_tag = document.createElement("annotation")
1272
ann_tag.setAttribute("name", annotation)
1273
ann_tag.setAttribute("value", value)
1274
if_tag.appendChild(ann_tag)
1275
# Fix argument name for the Introspect method itself
1276
if (if_tag.getAttribute("name")
1277
== dbus.INTROSPECTABLE_IFACE):
1278
for cn in if_tag.getElementsByTagName("method"):
1279
if cn.getAttribute("name") == "Introspect":
1280
for arg in cn.getElementsByTagName("arg"):
1281
if (arg.getAttribute("direction")
1282
== "out"):
1283
arg.setAttribute("name",
1284
"xml_data")
1285
xmlstring = document.toxml("utf-8")
1286
document.unlink()
1287
except (AttributeError, xml.dom.DOMException,
1288
xml.parsers.expat.ExpatError) as error:
1289
logger.error("Failed to override Introspection method",
1290
exc_info=error)
1291
return xmlstring
1292
1293
1294
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1295
"""A D-Bus object with properties.
1296
1297
Classes inheriting from this can use the dbus_service_property
1298
decorator to expose methods as D-Bus properties. It exposes the
1299
standard Get(), Set(), and GetAll() methods on the D-Bus.
1300
"""
1301
876
1302
def _get_dbus_property(self, interface_name, property_name):
877
1303
"""Returns a bound method if one exists which is a D-Bus
878
1304
property with the specified name and interface.
879
1305
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
1306
for cls in self.__class__.__mro__:
1307
for name, value in inspect.getmembers(
1308
cls, self._is_dbus_thing("property")):
884
1309
if (value._dbus_name == property_name
885
1310
and value._dbus_interface == interface_name):
886
1311
return value.__get__(self)
887
1312
888
1313
# No such property
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
891
+ property_name)
892
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1314
raise DBusPropertyNotFound("{}:{}.{}".format(
1315
self.dbus_object_path, interface_name, property_name))
1316
1317
@classmethod
1318
def _get_all_interface_names(cls):
1319
"""Get a sequence of all interfaces supported by an object"""
1320
return (name for name in set(getattr(getattr(x, attr),
1321
"_dbus_interface", None)
1322
for x in (inspect.getmro(cls))
1323
for attr in dir(x))
1324
if name is not None)
1325
1326
@dbus.service.method(dbus.PROPERTIES_IFACE,
1327
in_signature="ss",
894
1328
out_signature="v")
895
1329
def Get(self, interface_name, property_name):
896
1330
"""Standard D-Bus property Get() method, see D-Bus standard.
902
1336
if not hasattr(value, "variant_level"):
903
1337
return value
904
1338
return type(value)(value, variant_level=value.variant_level+1)
905
1339
906
1340
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
907
1341
def Set(self, interface_name, property_name, value):
908
1342
"""Standard D-Bus property Set() method, see D-Bus standard.
920
1354
value = dbus.ByteArray(b''.join(chr(byte)
921
1355
for byte in value))
922
1356
prop(value)
923
924
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1357
1358
@dbus.service.method(dbus.PROPERTIES_IFACE,
1359
in_signature="s",
925
1360
out_signature="a{sv}")
926
1361
def GetAll(self, interface_name):
927
1362
"""Standard D-Bus property GetAll() method, see D-Bus
928
1363
standard.
929
1364
930
1365
Note: Will not include properties with access="write".
931
1366
"""
932
1367
properties = {}
942
1377
if not hasattr(value, "variant_level"):
943
1378
properties[name] = value
944
1379
continue
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
1380
properties[name] = type(value)(
1381
value, variant_level=value.variant_level + 1)
947
1382
return dbus.Dictionary(properties, signature="sv")
948
1383
949
1384
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
1385
def PropertiesChanged(self, interface_name, changed_properties,
951
1386
invalidated_properties):
953
1388
standard.
954
1389
"""
955
1390
pass
956
1391
957
1392
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
958
1393
out_signature="s",
959
1394
path_keyword='object_path',
960
1395
connection_keyword='connection')
961
1396
def Introspect(self, object_path, connection):
962
1397
"""Overloading of standard D-Bus method.
963
1398
964
1399
Inserts property tags and interface annotation tags.
965
1400
"""
966
xmlstring = dbus.service.Object.Introspect(self, object_path,
967
connection)
1401
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1402
object_path,
1403
connection)
968
1404
try:
969
1405
document = xml.dom.minidom.parseString(xmlstring)
1406
970
1407
def make_tag(document, name, prop):
971
1408
e = document.createElement("property")
972
1409
e.setAttribute("name", name)
973
1410
e.setAttribute("type", prop._dbus_signature)
974
1411
e.setAttribute("access", prop._dbus_access)
975
1412
return e
1413
976
1414
for if_tag in document.getElementsByTagName("interface"):
977
1415
# Add property tags
978
1416
for tag in (make_tag(document, name, prop)
981
1419
if prop._dbus_interface
982
1420
== if_tag.getAttribute("name")):
983
1421
if_tag.appendChild(tag)
984
# Add annotation tags
985
for typ in ("method", "signal", "property"):
986
for tag in if_tag.getElementsByTagName(typ):
987
annots = dict()
988
for name, prop in (self.
989
_get_all_dbus_things(typ)):
990
if (name == tag.getAttribute("name")
991
and prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
annots.update(getattr
994
(prop,
995
"_dbus_annotations",
996
{}))
997
for name, value in annots.items():
998
ann_tag = document.createElement(
999
"annotation")
1000
ann_tag.setAttribute("name", name)
1001
ann_tag.setAttribute("value", value)
1002
tag.appendChild(ann_tag)
1003
# Add interface annotation tags
1004
for annotation, value in dict(
1005
itertools.chain.from_iterable(
1006
annotations().items()
1007
for name, annotations in
1008
self._get_all_dbus_things("interface")
1009
if name == if_tag.getAttribute("name")
1010
)).items():
1011
ann_tag = document.createElement("annotation")
1012
ann_tag.setAttribute("name", annotation)
1013
ann_tag.setAttribute("value", value)
1014
if_tag.appendChild(ann_tag)
1422
# Add annotation tags for properties
1423
for tag in if_tag.getElementsByTagName("property"):
1424
annots = dict()
1425
for name, prop in self._get_all_dbus_things(
1426
"property"):
1427
if (name == tag.getAttribute("name")
1428
and prop._dbus_interface
1429
== if_tag.getAttribute("name")):
1430
annots.update(getattr(
1431
prop, "_dbus_annotations", {}))
1432
for name, value in annots.items():
1433
ann_tag = document.createElement(
1434
"annotation")
1435
ann_tag.setAttribute("name", name)
1436
ann_tag.setAttribute("value", value)
1437
tag.appendChild(ann_tag)
1015
1438
# Add the names to the return values for the
1016
1439
# "org.freedesktop.DBus.Properties" methods
1017
1440
if (if_tag.getAttribute("name")
1035
1458
exc_info=error)
1036
1459
return xmlstring
1037
1460
1461
try:
1462
dbus.OBJECT_MANAGER_IFACE
1463
except AttributeError:
1464
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1465
1466
1467
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1468
"""A D-Bus object with an ObjectManager.
1469
1470
Classes inheriting from this exposes the standard
1471
GetManagedObjects call and the InterfacesAdded and
1472
InterfacesRemoved signals on the standard
1473
"org.freedesktop.DBus.ObjectManager" interface.
1474
1475
Note: No signals are sent automatically; they must be sent
1476
manually.
1477
"""
1478
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1479
out_signature="a{oa{sa{sv}}}")
1480
def GetManagedObjects(self):
1481
"""This function must be overridden"""
1482
raise NotImplementedError()
1483
1484
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1485
signature="oa{sa{sv}}")
1486
def InterfacesAdded(self, object_path, interfaces_and_properties):
1487
pass
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1490
def InterfacesRemoved(self, object_path, interfaces):
1491
pass
1492
1493
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1494
out_signature="s",
1495
path_keyword='object_path',
1496
connection_keyword='connection')
1497
def Introspect(self, object_path, connection):
1498
"""Overloading of standard D-Bus method.
1499
1500
Override return argument name of GetManagedObjects to be
1501
"objpath_interfaces_and_properties"
1502
"""
1503
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1504
object_path,
1505
connection)
1506
try:
1507
document = xml.dom.minidom.parseString(xmlstring)
1508
1509
for if_tag in document.getElementsByTagName("interface"):
1510
# Fix argument name for the GetManagedObjects method
1511
if (if_tag.getAttribute("name")
1512
== dbus.OBJECT_MANAGER_IFACE):
1513
for cn in if_tag.getElementsByTagName("method"):
1514
if (cn.getAttribute("name")
1515
== "GetManagedObjects"):
1516
for arg in cn.getElementsByTagName("arg"):
1517
if (arg.getAttribute("direction")
1518
== "out"):
1519
arg.setAttribute(
1520
"name",
1521
"objpath_interfaces"
1522
"_and_properties")
1523
xmlstring = document.toxml("utf-8")
1524
document.unlink()
1525
except (AttributeError, xml.dom.DOMException,
1526
xml.parsers.expat.ExpatError) as error:
1527
logger.error("Failed to override Introspection method",
1528
exc_info=error)
1529
return xmlstring
1530
1038
1531
1039
1532
def datetime_to_dbus(dt, variant_level=0):
1040
1533
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1041
1534
if dt is None:
1042
return dbus.String("", variant_level = variant_level)
1043
return dbus.String(dt.isoformat(),
1044
variant_level=variant_level)
1535
return dbus.String("", variant_level=variant_level)
1536
return dbus.String(dt.isoformat(), variant_level=variant_level)
1045
1537
1046
1538
1047
1539
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1049
1541
dbus.service.Object, it will add alternate D-Bus attributes with
1050
1542
interface names according to the "alt_interface_names" mapping.
1051
1543
Usage:
1052
1544
1053
1545
@alternate_dbus_interfaces({"org.example.Interface":
1054
1546
"net.example.AlternateInterface"})
1055
1547
class SampleDBusObject(dbus.service.Object):
1056
1548
@dbus.service.method("org.example.Interface")
1057
1549
def SampleDBusMethod():
1058
1550
pass
1059
1551
1060
1552
The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
1553
reachable via two interfaces: "org.example.Interface" and
1062
1554
"net.example.AlternateInterface", the latter of which will have
1063
1555
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
1556
"true", unless "deprecate" is passed with a False value.
1065
1557
1066
1558
This works for methods and signals, and also for D-Bus properties
1067
1559
(from DBusObjectWithProperties) and interfaces (from the
1068
1560
dbus_interface_annotations decorator).
1069
1561
"""
1562
1070
1563
def wrapper(cls):
1071
1564
for orig_interface_name, alt_interface_name in (
1072
alt_interface_names.items()):
1565
alt_interface_names.items()):
1073
1566
attr = {}
1074
1567
interface_names = set()
1075
1568
# Go though all attributes of the class
1077
1570
# Ignore non-D-Bus attributes, and D-Bus attributes
1078
1571
# with the wrong interface name
1079
1572
if (not hasattr(attribute, "_dbus_interface")
1080
or not attribute._dbus_interface
1081
.startswith(orig_interface_name)):
1573
or not attribute._dbus_interface.startswith(
1574
orig_interface_name)):
1082
1575
continue
1083
1576
# Create an alternate D-Bus interface name based on
1084
1577
# the current name
1085
alt_interface = (attribute._dbus_interface
1086
.replace(orig_interface_name,
1087
alt_interface_name))
1578
alt_interface = attribute._dbus_interface.replace(
1579
orig_interface_name, alt_interface_name)
1088
1580
interface_names.add(alt_interface)
1089
1581
# Is this a D-Bus signal?
1090
1582
if getattr(attribute, "_dbus_is_signal", False):
1091
1583
# Extract the original non-method undecorated
1092
1584
# function by black magic
1093
nonmethod_func = (dict(
1585
if sys.version_info.major == 2:
1586
nonmethod_func = (dict(
1094
1587
zip(attribute.func_code.co_freevars,
1095
attribute.__closure__))["func"]
1096
.cell_contents)
1588
attribute.__closure__))
1589
["func"].cell_contents)
1590
else:
1591
nonmethod_func = (dict(
1592
zip(attribute.__code__.co_freevars,
1593
attribute.__closure__))
1594
["func"].cell_contents)
1097
1595
# Create a new, but exactly alike, function
1098
1596
# object, and decorate it to be a new D-Bus signal
1099
1597
# with the alternate D-Bus interface name
1100
new_function = (dbus.service.signal
1101
(alt_interface,
1102
attribute._dbus_signature)
1103
(types.FunctionType(
1104
nonmethod_func.func_code,
1105
nonmethod_func.func_globals,
1106
nonmethod_func.func_name,
1107
nonmethod_func.func_defaults,
1108
nonmethod_func.func_closure)))
1598
new_function = copy_function(nonmethod_func)
1599
new_function = (dbus.service.signal(
1600
alt_interface,
1601
attribute._dbus_signature)(new_function))
1109
1602
# Copy annotations, if any
1110
1603
try:
1111
new_function._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1604
new_function._dbus_annotations = dict(
1605
attribute._dbus_annotations)
1113
1606
except AttributeError:
1114
1607
pass
1608
1115
1609
# Define a creator of a function to call both the
1116
1610
# original and alternate functions, so both the
1117
1611
# original and alternate signals gets sent when
1120
1614
"""This function is a scope container to pass
1121
1615
func1 and func2 to the "call_both" function
1122
1616
outside of its arguments"""
1617
1618
@functools.wraps(func2)
1123
1619
def call_both(*args, **kwargs):
1124
1620
"""This function will emit two D-Bus
1125
1621
signals by calling func1 and func2"""
1126
1622
func1(*args, **kwargs)
1127
1623
func2(*args, **kwargs)
1624
# Make wrapper function look like a D-Bus
1625
# signal
1626
for name, attr in inspect.getmembers(func2):
1627
if name.startswith("_dbus_"):
1628
setattr(call_both, name, attr)
1629
1128
1630
return call_both
1129
1631
# Create the "call_both" function and add it to
1130
1632
# the class
1135
1637
# object. Decorate it to be a new D-Bus method
1136
1638
# with the alternate D-Bus interface name. Add it
1137
1639
# to the class.
1138
attr[attrname] = (dbus.service.method
1139
(alt_interface,
1140
attribute._dbus_in_signature,
1141
attribute._dbus_out_signature)
1142
(types.FunctionType
1143
(attribute.func_code,
1144
attribute.func_globals,
1145
attribute.func_name,
1146
attribute.func_defaults,
1147
attribute.func_closure)))
1640
attr[attrname] = (
1641
dbus.service.method(
1642
alt_interface,
1643
attribute._dbus_in_signature,
1644
attribute._dbus_out_signature)
1645
(copy_function(attribute)))
1148
1646
# Copy annotations, if any
1149
1647
try:
1150
attr[attrname]._dbus_annotations = (
1151
dict(attribute._dbus_annotations))
1648
attr[attrname]._dbus_annotations = dict(
1649
attribute._dbus_annotations)
1152
1650
except AttributeError:
1153
1651
pass
1154
1652
# Is this a D-Bus property?
1157
1655
# object, and decorate it to be a new D-Bus
1158
1656
# property with the alternate D-Bus interface
1159
1657
# name. Add it to the class.
1160
attr[attrname] = (dbus_service_property
1161
(alt_interface,
1162
attribute._dbus_signature,
1163
attribute._dbus_access,
1164
attribute
1165
._dbus_get_args_options
1166
["byte_arrays"])
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1658
attr[attrname] = (dbus_service_property(
1659
alt_interface, attribute._dbus_signature,
1660
attribute._dbus_access,
1661
attribute._dbus_get_args_options
1662
["byte_arrays"])
1663
(copy_function(attribute)))
1173
1664
# Copy annotations, if any
1174
1665
try:
1175
attr[attrname]._dbus_annotations = (
1176
dict(attribute._dbus_annotations))
1666
attr[attrname]._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1177
1668
except AttributeError:
1178
1669
pass
1179
1670
# Is this a D-Bus interface?
1182
1673
# object. Decorate it to be a new D-Bus interface
1183
1674
# with the alternate D-Bus interface name. Add it
1184
1675
# to the class.
1185
attr[attrname] = (dbus_interface_annotations
1186
(alt_interface)
1187
(types.FunctionType
1188
(attribute.func_code,
1189
attribute.func_globals,
1190
attribute.func_name,
1191
attribute.func_defaults,
1192
attribute.func_closure)))
1676
attr[attrname] = (
1677
dbus_interface_annotations(alt_interface)
1678
(copy_function(attribute)))
1193
1679
if deprecate:
1194
1680
# Deprecate all alternate interfaces
1195
iname="_AlternateDBusNames_interface_annotation{}"
1681
iname = "_AlternateDBusNames_interface_annotation{}"
1196
1682
for interface_name in interface_names:
1683
1197
1684
@dbus_interface_annotations(interface_name)
1198
1685
def func(self):
1199
return { "org.freedesktop.DBus.Deprecated":
1200
"true" }
1686
return {"org.freedesktop.DBus.Deprecated":
1687
"true"}
1201
1688
# Find an unused name
1202
1689
for aname in (iname.format(i)
1203
1690
for i in itertools.count()):
1207
1694
if interface_names:
1208
1695
# Replace the class with a new subclass of it with
1209
1696
# methods, signals, etc. as created above.
1210
cls = type(b"{}Alternate".format(cls.__name__),
1211
(cls,), attr)
1697
if sys.version_info.major == 2:
1698
cls = type(b"{}Alternate".format(cls.__name__),
1699
(cls, ), attr)
1700
else:
1701
cls = type("{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1212
1703
return cls
1704
1213
1705
return wrapper
1214
1706
1215
1707
1216
1708
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
"se.bsnet.fukt.Mandos"})
1709
"se.bsnet.fukt.Mandos"})
1218
1710
class ClientDBus(Client, DBusObjectWithProperties):
1219
1711
"""A Client class using D-Bus
1220
1712
1221
1713
Attributes:
1222
1714
dbus_object_path: dbus.ObjectPath
1223
1715
bus: dbus.SystemBus()
1224
1716
"""
1225
1717
1226
1718
runtime_expansions = (Client.runtime_expansions
1227
+ ("dbus_object_path",))
1228
1719
+ ("dbus_object_path", ))
1720
1229
1721
_interface = "se.recompile.Mandos.Client"
1230
1722
1231
1723
# dbus.service.Object doesn't use super(), so we can't either.
1232
1233
def __init__(self, bus = None, *args, **kwargs):
1724
1725
def __init__(self, bus=None, *args, **kwargs):
1234
1726
self.bus = bus
1235
1727
Client.__init__(self, *args, **kwargs)
1236
1728
# Only now, when this client is initialized, can it show up on
1238
1730
client_object_name = str(self.name).translate(
1239
1731
{ord("."): ord("_"),
1240
1732
ord("-"): ord("_")})
1241
self.dbus_object_path = (dbus.ObjectPath
1242
("/clients/" + client_object_name))
1733
self.dbus_object_path = dbus.ObjectPath(
1734
"/clients/" + client_object_name)
1243
1735
DBusObjectWithProperties.__init__(self, self.bus,
1244
1736
self.dbus_object_path)
1245
1246
def notifychangeproperty(transform_func,
1247
dbus_name, type_func=lambda x: x,
1248
variant_level=1, invalidate_only=False,
1737
1738
def notifychangeproperty(transform_func, dbus_name,
1739
type_func=lambda x: x,
1740
variant_level=1,
1741
invalidate_only=False,
1249
1742
_interface=_interface):
1250
1743
""" Modify a variable so that it's a property which announces
1251
1744
its changes to DBus.
1252
1745
1253
1746
transform_fun: Function that takes a value and a variant_level
1254
1747
and transforms it to a D-Bus type.
1255
1748
dbus_name: D-Bus name of the variable
1258
1751
variant_level: D-Bus variant level. Default: 1
1259
1752
"""
1260
1753
attrname = "_{}".format(dbus_name)
1754
1261
1755
def setter(self, value):
1262
1756
if hasattr(self, "dbus_object_path"):
1263
1757
if (not hasattr(self, attrname) or
1264
1758
type_func(getattr(self, attrname, None))
1265
1759
!= type_func(value)):
1266
1760
if invalidate_only:
1267
self.PropertiesChanged(_interface,
1268
dbus.Dictionary(),
1269
dbus.Array
1270
((dbus_name,)))
1761
self.PropertiesChanged(
1762
_interface, dbus.Dictionary(),
1763
dbus.Array((dbus_name, )))
1271
1764
else:
1272
dbus_value = transform_func(type_func(value),
1273
variant_level
1274
=variant_level)
1765
dbus_value = transform_func(
1766
type_func(value),
1767
variant_level=variant_level)
1275
1768
self.PropertyChanged(dbus.String(dbus_name),
1276
1769
dbus_value)
1277
self.PropertiesChanged(_interface,
1278
dbus.Dictionary({
1279
dbus.String(dbus_name):
1280
dbus_value }), dbus.Array())
1770
self.PropertiesChanged(
1771
_interface,
1772
dbus.Dictionary({dbus.String(dbus_name):
1773
dbus_value}),
1774
dbus.Array())
1281
1775
setattr(self, attrname, value)
1282
1776
1283
1777
return property(lambda self: getattr(self, attrname), setter)
1284
1778
1285
1779
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1286
1780
approvals_pending = notifychangeproperty(dbus.Boolean,
1287
1781
"ApprovalPending",
1288
type_func = bool)
1782
type_func=bool)
1289
1783
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1290
1784
last_enabled = notifychangeproperty(datetime_to_dbus,
1291
1785
"LastEnabled")
1292
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1293
type_func = lambda checker:
1294
checker is not None)
1786
checker = notifychangeproperty(
1787
dbus.Boolean, "CheckerRunning",
1788
type_func=lambda checker: checker is not None)
1295
1789
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1296
1790
"LastCheckedOK")
1297
1791
last_checker_status = notifychangeproperty(dbus.Int16,
1300
1794
datetime_to_dbus, "LastApprovalRequest")
1301
1795
approved_by_default = notifychangeproperty(dbus.Boolean,
1302
1796
"ApprovedByDefault")
1303
approval_delay = notifychangeproperty(dbus.UInt64,
1304
"ApprovalDelay",
1305
type_func =
1306
lambda td: td.total_seconds()
1307
* 1000)
1797
approval_delay = notifychangeproperty(
1798
dbus.UInt64, "ApprovalDelay",
1799
type_func=lambda td: td.total_seconds() * 1000)
1308
1800
approval_duration = notifychangeproperty(
1309
1801
dbus.UInt64, "ApprovalDuration",
1310
type_func = lambda td: td.total_seconds() * 1000)
1802
type_func=lambda td: td.total_seconds() * 1000)
1311
1803
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func = lambda td:
1314
td.total_seconds() * 1000)
1804
timeout = notifychangeproperty(
1805
dbus.UInt64, "Timeout",
1806
type_func=lambda td: td.total_seconds() * 1000)
1315
1807
extended_timeout = notifychangeproperty(
1316
1808
dbus.UInt64, "ExtendedTimeout",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
lambda td: td.total_seconds()
1322
* 1000)
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
interval = notifychangeproperty(
1811
dbus.UInt64, "Interval",
1812
type_func=lambda td: td.total_seconds() * 1000)
1323
1813
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
1814
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
1815
invalidate_only=True)
1326
1816
1327
1817
del notifychangeproperty
1328
1818
1329
1819
def __del__(self, *args, **kwargs):
1330
1820
try:
1331
1821
self.remove_from_connection()
1334
1824
if hasattr(DBusObjectWithProperties, "__del__"):
1335
1825
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1336
1826
Client.__del__(self, *args, **kwargs)
1337
1338
def checker_callback(self, pid, condition, command,
1339
*args, **kwargs):
1340
self.checker_callback_tag = None
1341
self.checker = None
1342
if os.WIFEXITED(condition):
1343
exitstatus = os.WEXITSTATUS(condition)
1827
1828
def checker_callback(self, source, condition,
1829
connection, command, *args, **kwargs):
1830
ret = Client.checker_callback(self, source, condition,
1831
connection, command, *args,
1832
**kwargs)
1833
exitstatus = self.last_checker_status
1834
if exitstatus >= 0:
1344
1835
# Emit D-Bus signal
1345
1836
self.CheckerCompleted(dbus.Int16(exitstatus),
1346
dbus.Int64(condition),
1837
# This is specific to GNU libC
1838
dbus.Int64(exitstatus << 8),
1347
1839
dbus.String(command))
1348
1840
else:
1349
1841
# Emit D-Bus signal
1350
1842
self.CheckerCompleted(dbus.Int16(-1),
1351
dbus.Int64(condition),
1843
dbus.Int64(
1844
# This is specific to GNU libC
1845
(exitstatus << 8)
1846
| self.last_checker_signal),
1352
1847
dbus.String(command))
1353
1354
return Client.checker_callback(self, pid, condition, command,
1355
*args, **kwargs)
1356
1848
return ret
1849
1357
1850
def start_checker(self, *args, **kwargs):
1358
1851
old_checker_pid = getattr(self.checker, "pid", None)
1359
1852
r = Client.start_checker(self, *args, **kwargs)
1363
1856
# Emit D-Bus signal
1364
1857
self.CheckerStarted(self.current_checker_command)
1365
1858
return r
1366
1859
1367
1860
def _reset_approved(self):
1368
1861
self.approved = None
1369
1862
return False
1370
1863
1371
1864
def approve(self, value=True):
1372
1865
self.approved = value
1373
gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
* 1000), self._reset_approved)
1866
GLib.timeout_add(int(self.approval_duration.total_seconds()
1867
* 1000), self._reset_approved)
1375
1868
self.send_changedstate()
1376
1377
## D-Bus methods, signals & properties
1378
1379
## Interfaces
1380
1381
## Signals
1382
1869
1870
# D-Bus methods, signals & properties
1871
1872
# Interfaces
1873
1874
# Signals
1875
1383
1876
# CheckerCompleted - signal
1384
1877
@dbus.service.signal(_interface, signature="nxs")
1385
1878
def CheckerCompleted(self, exitcode, waitstatus, command):
1386
1879
"D-Bus signal"
1387
1880
pass
1388
1881
1389
1882
# CheckerStarted - signal
1390
1883
@dbus.service.signal(_interface, signature="s")
1391
1884
def CheckerStarted(self, command):
1392
1885
"D-Bus signal"
1393
1886
pass
1394
1887
1395
1888
# PropertyChanged - signal
1396
1889
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
1890
@dbus.service.signal(_interface, signature="sv")
1398
1891
def PropertyChanged(self, property, value):
1399
1892
"D-Bus signal"
1400
1893
pass
1401
1894
1402
1895
# GotSecret - signal
1403
1896
@dbus.service.signal(_interface)
1404
1897
def GotSecret(self):
1407
1900
server to mandos-client
1408
1901
"""
1409
1902
pass
1410
1903
1411
1904
# Rejected - signal
1412
1905
@dbus.service.signal(_interface, signature="s")
1413
1906
def Rejected(self, reason):
1414
1907
"D-Bus signal"
1415
1908
pass
1416
1909
1417
1910
# NeedApproval - signal
1418
1911
@dbus.service.signal(_interface, signature="tb")
1419
1912
def NeedApproval(self, timeout, default):
1420
1913
"D-Bus signal"
1421
1914
return self.need_approval()
1422
1423
## Methods
1424
1915
1916
# Methods
1917
1425
1918
# Approve - method
1426
1919
@dbus.service.method(_interface, in_signature="b")
1427
1920
def Approve(self, value):
1428
1921
self.approve(value)
1429
1922
1430
1923
# CheckedOK - method
1431
1924
@dbus.service.method(_interface)
1432
1925
def CheckedOK(self):
1433
1926
self.checked_ok()
1434
1927
1435
1928
# Enable - method
1929
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1436
1930
@dbus.service.method(_interface)
1437
1931
def Enable(self):
1438
1932
"D-Bus method"
1439
1933
self.enable()
1440
1934
1441
1935
# StartChecker - method
1936
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1442
1937
@dbus.service.method(_interface)
1443
1938
def StartChecker(self):
1444
1939
"D-Bus method"
1445
1940
self.start_checker()
1446
1941
1447
1942
# Disable - method
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1448
1944
@dbus.service.method(_interface)
1449
1945
def Disable(self):
1450
1946
"D-Bus method"
1451
1947
self.disable()
1452
1948
1453
1949
# StopChecker - method
1950
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1454
1951
@dbus.service.method(_interface)
1455
1952
def StopChecker(self):
1456
1953
self.stop_checker()
1457
1458
## Properties
1459
1954
1955
# Properties
1956
1460
1957
# ApprovalPending - property
1461
1958
@dbus_service_property(_interface, signature="b", access="read")
1462
1959
def ApprovalPending_dbus_property(self):
1463
1960
return dbus.Boolean(bool(self.approvals_pending))
1464
1961
1465
1962
# ApprovedByDefault - property
1466
@dbus_service_property(_interface, signature="b",
1963
@dbus_service_property(_interface,
1964
signature="b",
1467
1965
access="readwrite")
1468
1966
def ApprovedByDefault_dbus_property(self, value=None):
1469
1967
if value is None: # get
1470
1968
return dbus.Boolean(self.approved_by_default)
1471
1969
self.approved_by_default = bool(value)
1472
1970
1473
1971
# ApprovalDelay - property
1474
@dbus_service_property(_interface, signature="t",
1972
@dbus_service_property(_interface,
1973
signature="t",
1475
1974
access="readwrite")
1476
1975
def ApprovalDelay_dbus_property(self, value=None):
1477
1976
if value is None: # get
1478
1977
return dbus.UInt64(self.approval_delay.total_seconds()
1479
1978
* 1000)
1480
1979
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1481
1980
1482
1981
# ApprovalDuration - property
1483
@dbus_service_property(_interface, signature="t",
1982
@dbus_service_property(_interface,
1983
signature="t",
1484
1984
access="readwrite")
1485
1985
def ApprovalDuration_dbus_property(self, value=None):
1486
1986
if value is None: # get
1487
1987
return dbus.UInt64(self.approval_duration.total_seconds()
1488
1988
* 1000)
1489
1989
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1490
1990
1491
1991
# Name - property
1992
@dbus_annotations(
1993
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1492
1994
@dbus_service_property(_interface, signature="s", access="read")
1493
1995
def Name_dbus_property(self):
1494
1996
return dbus.String(self.name)
1495
1997
1496
1998
# Fingerprint - property
1999
@dbus_annotations(
2000
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1497
2001
@dbus_service_property(_interface, signature="s", access="read")
1498
2002
def Fingerprint_dbus_property(self):
1499
2003
return dbus.String(self.fingerprint)
1500
2004
1501
2005
# Host - property
1502
@dbus_service_property(_interface, signature="s",
2006
@dbus_service_property(_interface,
2007
signature="s",
1503
2008
access="readwrite")
1504
2009
def Host_dbus_property(self, value=None):
1505
2010
if value is None: # get
1506
2011
return dbus.String(self.host)
1507
2012
self.host = str(value)
1508
2013
1509
2014
# Created - property
2015
@dbus_annotations(
2016
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1510
2017
@dbus_service_property(_interface, signature="s", access="read")
1511
2018
def Created_dbus_property(self):
1512
2019
return datetime_to_dbus(self.created)
1513
2020
1514
2021
# LastEnabled - property
1515
2022
@dbus_service_property(_interface, signature="s", access="read")
1516
2023
def LastEnabled_dbus_property(self):
1517
2024
return datetime_to_dbus(self.last_enabled)
1518
2025
1519
2026
# Enabled - property
1520
@dbus_service_property(_interface, signature="b",
2027
@dbus_service_property(_interface,
2028
signature="b",
1521
2029
access="readwrite")
1522
2030
def Enabled_dbus_property(self, value=None):
1523
2031
if value is None: # get
1526
2034
self.enable()
1527
2035
else:
1528
2036
self.disable()
1529
2037
1530
2038
# LastCheckedOK - property
1531
@dbus_service_property(_interface, signature="s",
2039
@dbus_service_property(_interface,
2040
signature="s",
1532
2041
access="readwrite")
1533
2042
def LastCheckedOK_dbus_property(self, value=None):
1534
2043
if value is not None:
1535
2044
self.checked_ok()
1536
2045
return
1537
2046
return datetime_to_dbus(self.last_checked_ok)
1538
2047
1539
2048
# LastCheckerStatus - property
1540
@dbus_service_property(_interface, signature="n",
1541
access="read")
2049
@dbus_service_property(_interface, signature="n", access="read")
1542
2050
def LastCheckerStatus_dbus_property(self):
1543
2051
return dbus.Int16(self.last_checker_status)
1544
2052
1545
2053
# Expires - property
1546
2054
@dbus_service_property(_interface, signature="s", access="read")
1547
2055
def Expires_dbus_property(self):
1548
2056
return datetime_to_dbus(self.expires)
1549
2057
1550
2058
# LastApprovalRequest - property
1551
2059
@dbus_service_property(_interface, signature="s", access="read")
1552
2060
def LastApprovalRequest_dbus_property(self):
1553
2061
return datetime_to_dbus(self.last_approval_request)
1554
2062
1555
2063
# Timeout - property
1556
@dbus_service_property(_interface, signature="t",
2064
@dbus_service_property(_interface,
2065
signature="t",
1557
2066
access="readwrite")
1558
2067
def Timeout_dbus_property(self, value=None):
1559
2068
if value is None: # get
1571
2080
if (getattr(self, "disable_initiator_tag", None)
1572
2081
is None):
1573
2082
return
1574
gobject.source_remove(self.disable_initiator_tag)
1575
self.disable_initiator_tag = (
1576
gobject.timeout_add(
1577
int((self.expires - now).total_seconds()
1578
* 1000), self.disable))
1579
2083
GLib.source_remove(self.disable_initiator_tag)
2084
self.disable_initiator_tag = GLib.timeout_add(
2085
int((self.expires - now).total_seconds() * 1000),
2086
self.disable)
2087
1580
2088
# ExtendedTimeout - property
1581
@dbus_service_property(_interface, signature="t",
2089
@dbus_service_property(_interface,
2090
signature="t",
1582
2091
access="readwrite")
1583
2092
def ExtendedTimeout_dbus_property(self, value=None):
1584
2093
if value is None: # get
1585
2094
return dbus.UInt64(self.extended_timeout.total_seconds()
1586
2095
* 1000)
1587
2096
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
2097
1589
2098
# Interval - property
1590
@dbus_service_property(_interface, signature="t",
2099
@dbus_service_property(_interface,
2100
signature="t",
1591
2101
access="readwrite")
1592
2102
def Interval_dbus_property(self, value=None):
1593
2103
if value is None: # get
1597
2107
return
1598
2108
if self.enabled:
1599
2109
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1604
2110
GLib.source_remove(self.checker_initiator_tag)
2111
self.checker_initiator_tag = GLib.timeout_add(
2112
value, self.start_checker)
2113
self.start_checker() # Start one now, too
2114
1605
2115
# Checker - property
1606
@dbus_service_property(_interface, signature="s",
2116
@dbus_service_property(_interface,
2117
signature="s",
1607
2118
access="readwrite")
1608
2119
def Checker_dbus_property(self, value=None):
1609
2120
if value is None: # get
1610
2121
return dbus.String(self.checker_command)
1611
2122
self.checker_command = str(value)
1612
2123
1613
2124
# CheckerRunning - property
1614
@dbus_service_property(_interface, signature="b",
2125
@dbus_service_property(_interface,
2126
signature="b",
1615
2127
access="readwrite")
1616
2128
def CheckerRunning_dbus_property(self, value=None):
1617
2129
if value is None: # get
1620
2132
self.start_checker()
1621
2133
else:
1622
2134
self.stop_checker()
1623
2135
1624
2136
# ObjectPath - property
2137
@dbus_annotations(
2138
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2139
"org.freedesktop.DBus.Deprecated": "true"})
1625
2140
@dbus_service_property(_interface, signature="o", access="read")
1626
2141
def ObjectPath_dbus_property(self):
1627
return self.dbus_object_path # is already a dbus.ObjectPath
1628
2142
return self.dbus_object_path # is already a dbus.ObjectPath
2143
1629
2144
# Secret = property
1630
@dbus_service_property(_interface, signature="ay",
1631
access="write", byte_arrays=True)
2145
@dbus_annotations(
2146
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2147
"invalidates"})
2148
@dbus_service_property(_interface,
2149
signature="ay",
2150
access="write",
2151
byte_arrays=True)
1632
2152
def Secret_dbus_property(self, value):
1633
2153
self.secret = bytes(value)
1634
2154
1635
2155
del _interface
1636
2156
1637
2157
1640
2160
self._pipe = child_pipe
1641
2161
self._pipe.send(('init', fpr, address))
1642
2162
if not self._pipe.recv():
1643
raise KeyError()
1644
2163
raise KeyError(fpr)
2164
1645
2165
def __getattribute__(self, name):
1646
2166
if name == '_pipe':
1647
2167
return super(ProxyClient, self).__getattribute__(name)
1650
2170
if data[0] == 'data':
1651
2171
return data[1]
1652
2172
if data[0] == 'function':
2173
1653
2174
def func(*args, **kwargs):
1654
2175
self._pipe.send(('funcall', name, args, kwargs))
1655
2176
return self._pipe.recv()[1]
2177
1656
2178
return func
1657
2179
1658
2180
def __setattr__(self, name, value):
1659
2181
if name == '_pipe':
1660
2182
return super(ProxyClient, self).__setattr__(name, value)
1663
2185
1664
2186
class ClientHandler(socketserver.BaseRequestHandler, object):
1665
2187
"""A class to handle client connections.
1666
2188
1667
2189
Instantiated once for each connection to handle it.
1668
2190
Note: This will run in its own forked process."""
1669
2191
1670
2192
def handle(self):
1671
2193
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
2194
logger.info("TCP connection from: %s",
1673
2195
str(self.client_address))
1674
2196
logger.debug("Pipe FD: %d",
1675
2197
self.server.child_pipe.fileno())
1676
1677
session = (gnutls.connection
1678
.ClientSession(self.request,
1679
gnutls.connection
1680
.X509Credentials()))
1681
1682
# Note: gnutls.connection.X509Credentials is really a
1683
# generic GnuTLS certificate credentials object so long as
1684
# no X.509 keys are added to it. Therefore, we can use it
1685
# here despite using OpenPGP certificates.
1686
1687
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
# "+AES-256-CBC", "+SHA1",
1689
# "+COMP-NULL", "+CTYPE-OPENPGP",
1690
# "+DHE-DSS"))
2198
2199
session = gnutls.ClientSession(self.request)
2200
2201
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2202
# "+AES-256-CBC", "+SHA1",
2203
# "+COMP-NULL", "+CTYPE-OPENPGP",
2204
# "+DHE-DSS"))
1691
2205
# Use a fallback default, since this MUST be set.
1692
2206
priority = self.server.gnutls_priority
1693
2207
if priority is None:
1694
2208
priority = "NORMAL"
1695
(gnutls.library.functions
1696
.gnutls_priority_set_direct(session._c_object,
1697
priority, None))
1698
2209
gnutls.priority_set_direct(session._c_object,
2210
priority.encode("utf-8"),
2211
None)
2212
1699
2213
# Start communication using the Mandos protocol
1700
2214
# Get protocol number
1701
2215
line = self.request.makefile().readline()
1706
2220
except (ValueError, IndexError, RuntimeError) as error:
1707
2221
logger.error("Unknown protocol version: %s", error)
1708
2222
return
1709
2223
1710
2224
# Start GnuTLS connection
1711
2225
try:
1712
2226
session.handshake()
1713
except gnutls.errors.GNUTLSError as error:
2227
except gnutls.Error as error:
1714
2228
logger.warning("Handshake failed: %s", error)
1715
2229
# Do not run session.bye() here: the session is not
1716
2230
# established. Just abandon the request.
1717
2231
return
1718
2232
logger.debug("Handshake succeeded")
1719
2233
1720
2234
approval_required = False
1721
2235
try:
1722
2236
try:
1723
fpr = self.fingerprint(self.peer_certificate
1724
(session))
1725
except (TypeError,
1726
gnutls.errors.GNUTLSError) as error:
2237
fpr = self.fingerprint(
2238
self.peer_certificate(session))
2239
except (TypeError, gnutls.Error) as error:
1727
2240
logger.warning("Bad certificate: %s", error)
1728
2241
return
1729
2242
logger.debug("Fingerprint: %s", fpr)
1730
2243
1731
2244
try:
1732
2245
client = ProxyClient(child_pipe, fpr,
1733
2246
self.client_address)
1734
2247
except KeyError:
1735
2248
return
1736
2249
1737
2250
if client.approval_delay:
1738
2251
delay = client.approval_delay
1739
2252
client.approvals_pending += 1
1740
2253
approval_required = True
1741
2254
1742
2255
while True:
1743
2256
if not client.enabled:
1744
2257
logger.info("Client %s is disabled",
1745
client.name)
2258
client.name)
1746
2259
if self.server.use_dbus:
1747
2260
# Emit D-Bus signal
1748
2261
client.Rejected("Disabled")
1749
2262
return
1750
2263
1751
2264
if client.approved or not client.approval_delay:
1752
#We are approved or approval is disabled
2265
# We are approved or approval is disabled
1753
2266
break
1754
2267
elif client.approved is None:
1755
2268
logger.info("Client %s needs approval",
1766
2279
# Emit D-Bus signal
1767
2280
client.Rejected("Denied")
1768
2281
return
1769
1770
#wait until timeout or approved
2282
2283
# wait until timeout or approved
1771
2284
time = datetime.datetime.now()
1772
2285
client.changedstate.acquire()
1773
2286
client.changedstate.wait(delay.total_seconds())
1786
2299
break
1787
2300
else:
1788
2301
delay -= time2 - time
1789
1790
sent_size = 0
1791
while sent_size < len(client.secret):
1792
try:
1793
sent = session.send(client.secret[sent_size:])
1794
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1796
exc_info=error)
1797
return
1798
logger.debug("Sent: %d, remaining: %d",
1799
sent, len(client.secret)
1800
- (sent_size + sent))
1801
sent_size += sent
1802
2302
2303
try:
2304
session.send(client.secret)
2305
except gnutls.Error as error:
2306
logger.warning("gnutls send failed",
2307
exc_info=error)
2308
return
2309
1803
2310
logger.info("Sending secret to %s", client.name)
1804
2311
# bump the timeout using extended_timeout
1805
2312
client.bump_timeout(client.extended_timeout)
1806
2313
if self.server.use_dbus:
1807
2314
# Emit D-Bus signal
1808
2315
client.GotSecret()
1809
2316
1810
2317
finally:
1811
2318
if approval_required:
1812
2319
client.approvals_pending -= 1
1813
2320
try:
1814
2321
session.bye()
1815
except gnutls.errors.GNUTLSError as error:
2322
except gnutls.Error as error:
1816
2323
logger.warning("GnuTLS bye failed",
1817
2324
exc_info=error)
1818
2325
1819
2326
@staticmethod
1820
2327
def peer_certificate(session):
1821
2328
"Return the peer's OpenPGP certificate as a bytestring"
1822
2329
# If not an OpenPGP certificate...
1823
if (gnutls.library.functions
1824
.gnutls_certificate_type_get(session._c_object)
1825
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1826
# ...do the normal thing
1827
return session.peer_certificate
2330
if (gnutls.certificate_type_get(session._c_object)
2331
!= gnutls.CRT_OPENPGP):
2332
# ...return invalid data
2333
return b""
1828
2334
list_size = ctypes.c_uint(1)
1829
cert_list = (gnutls.library.functions
1830
.gnutls_certificate_get_peers
2335
cert_list = (gnutls.certificate_get_peers
1831
2336
(session._c_object, ctypes.byref(list_size)))
1832
2337
if not bool(cert_list) and list_size.value != 0:
1833
raise gnutls.errors.GNUTLSError("error getting peer"
1834
" certificate")
2338
raise gnutls.Error("error getting peer certificate")
1835
2339
if list_size.value == 0:
1836
2340
return None
1837
2341
cert = cert_list[0]
1838
2342
return ctypes.string_at(cert.data, cert.size)
1839
2343
1840
2344
@staticmethod
1841
2345
def fingerprint(openpgp):
1842
2346
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1843
2347
# New GnuTLS "datum" with the OpenPGP public key
1844
datum = (gnutls.library.types
1845
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1846
ctypes.POINTER
1847
(ctypes.c_ubyte)),
1848
ctypes.c_uint(len(openpgp))))
2348
datum = gnutls.datum_t(
2349
ctypes.cast(ctypes.c_char_p(openpgp),
2350
ctypes.POINTER(ctypes.c_ubyte)),
2351
ctypes.c_uint(len(openpgp)))
1849
2352
# New empty GnuTLS certificate
1850
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1851
(gnutls.library.functions
1852
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2353
crt = gnutls.openpgp_crt_t()
2354
gnutls.openpgp_crt_init(ctypes.byref(crt))
1853
2355
# Import the OpenPGP public key into the certificate
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1856
gnutls.library.constants
1857
.GNUTLS_OPENPGP_FMT_RAW))
2356
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2357
gnutls.OPENPGP_FMT_RAW)
1858
2358
# Verify the self signature in the key
1859
2359
crtverify = ctypes.c_uint()
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_verify_self(crt, 0,
1862
ctypes.byref(crtverify)))
2360
gnutls.openpgp_crt_verify_self(crt, 0,
2361
ctypes.byref(crtverify))
1863
2362
if crtverify.value != 0:
1864
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1865
raise (gnutls.errors.CertificateSecurityError
1866
("Verify failed"))
2363
gnutls.openpgp_crt_deinit(crt)
2364
raise gnutls.CertificateSecurityError("Verify failed")
1867
2365
# New buffer for the fingerprint
1868
2366
buf = ctypes.create_string_buffer(20)
1869
2367
buf_len = ctypes.c_size_t()
1870
2368
# Get the fingerprint from the certificate into the buffer
1871
(gnutls.library.functions
1872
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1873
ctypes.byref(buf_len)))
2369
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2370
ctypes.byref(buf_len))
1874
2371
# Deinit the certificate
1875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2372
gnutls.openpgp_crt_deinit(crt)
1876
2373
# Convert the buffer to a Python bytestring
1877
2374
fpr = ctypes.string_at(buf, buf_len.value)
1878
2375
# Convert the bytestring to hexadecimal notation
1882
2379
1883
2380
class MultiprocessingMixIn(object):
1884
2381
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2382
1885
2383
def sub_process_main(self, request, address):
1886
2384
try:
1887
2385
self.finish_request(request, address)
1888
2386
except Exception:
1889
2387
self.handle_error(request, address)
1890
2388
self.close_request(request)
1891
2389
1892
2390
def process_request(self, request, address):
1893
2391
"""Start a new process to process the request."""
1894
proc = multiprocessing.Process(target = self.sub_process_main,
1895
args = (request, address))
2392
proc = multiprocessing.Process(target=self.sub_process_main,
2393
args=(request, address))
1896
2394
proc.start()
1897
2395
return proc
1898
2396
1899
2397
1900
2398
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1901
2399
""" adds a pipe to the MixIn """
2400
1902
2401
def process_request(self, request, client_address):
1903
2402
"""Overrides and wraps the original process_request().
1904
2403
1905
2404
This function creates a new pipe in self.pipe
1906
2405
"""
1907
2406
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1908
2407
1909
2408
proc = MultiprocessingMixIn.process_request(self, request,
1910
2409
client_address)
1911
2410
self.child_pipe.close()
1912
2411
self.add_pipe(parent_pipe, proc)
1913
2412
1914
2413
def add_pipe(self, parent_pipe, proc):
1915
2414
"""Dummy function; override as necessary"""
1916
2415
raise NotImplementedError()
1919
2418
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1920
2419
socketserver.TCPServer, object):
1921
2420
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1922
2421
1923
2422
Attributes:
1924
2423
enabled: Boolean; whether this server is activated yet
1925
2424
interface: None or a network interface name (string)
1926
2425
use_ipv6: Boolean; to use IPv6 or not
1927
2426
"""
2427
1928
2428
def __init__(self, server_address, RequestHandlerClass,
1929
interface=None, use_ipv6=True, socketfd=None):
2429
interface=None,
2430
use_ipv6=True,
2431
socketfd=None):
1930
2432
"""If socketfd is set, use that file descriptor instead of
1931
2433
creating a new one with socket.socket().
1932
2434
"""
1938
2440
self.socketfd = socketfd
1939
2441
# Save the original socket.socket() function
1940
2442
self.socket_socket = socket.socket
2443
1941
2444
# To implement --socket, we monkey patch socket.socket.
1942
#
2445
#
1943
2446
# (When socketserver.TCPServer is a new-style class, we
1944
2447
# could make self.socket into a property instead of monkey
1945
2448
# patching socket.socket.)
1946
#
2449
#
1947
2450
# Create a one-time-only replacement for socket.socket()
1948
2451
@functools.wraps(socket.socket)
1949
2452
def socket_wrapper(*args, **kwargs):
1961
2464
# socket_wrapper(), if socketfd was set.
1962
2465
socketserver.TCPServer.__init__(self, server_address,
1963
2466
RequestHandlerClass)
1964
2467
1965
2468
def server_bind(self):
1966
2469
"""This overrides the normal server_bind() function
1967
2470
to bind to an interface if one was specified, and also NOT to
1968
2471
bind to an address or port if they were not specified."""
2472
global SO_BINDTODEVICE
1969
2473
if self.interface is not None:
1970
2474
if SO_BINDTODEVICE is None:
1971
logger.error("SO_BINDTODEVICE does not exist;"
1972
" cannot bind to interface %s",
1973
self.interface)
1974
else:
1975
try:
1976
self.socket.setsockopt(socket.SOL_SOCKET,
1977
SO_BINDTODEVICE,
1978
(self.interface + "\0")
1979
.encode("utf-8"))
1980
except socket.error as error:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
elif error.errno == errno.ENOPROTOOPT:
1985
logger.error("SO_BINDTODEVICE not available;"
1986
" cannot bind to interface %s",
1987
self.interface)
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
1991
else:
1992
raise
2475
# Fall back to a hard-coded value which seems to be
2476
# common enough.
2477
logger.warning("SO_BINDTODEVICE not found, trying 25")
2478
SO_BINDTODEVICE = 25
2479
try:
2480
self.socket.setsockopt(
2481
socket.SOL_SOCKET, SO_BINDTODEVICE,
2482
(self.interface + "\0").encode("utf-8"))
2483
except socket.error as error:
2484
if error.errno == errno.EPERM:
2485
logger.error("No permission to bind to"
2486
" interface %s", self.interface)
2487
elif error.errno == errno.ENOPROTOOPT:
2488
logger.error("SO_BINDTODEVICE not available;"
2489
" cannot bind to interface %s",
2490
self.interface)
2491
elif error.errno == errno.ENODEV:
2492
logger.error("Interface %s does not exist,"
2493
" cannot bind", self.interface)
2494
else:
2495
raise
1993
2496
# Only bind(2) the socket if we really need to.
1994
2497
if self.server_address[0] or self.server_address[1]:
1995
2498
if not self.server_address[0]:
1996
2499
if self.address_family == socket.AF_INET6:
1997
any_address = "::" # in6addr_any
2500
any_address = "::" # in6addr_any
1998
2501
else:
1999
any_address = "0.0.0.0" # INADDR_ANY
2502
any_address = "0.0.0.0" # INADDR_ANY
2000
2503
self.server_address = (any_address,
2001
2504
self.server_address[1])
2002
2505
elif not self.server_address[1]:
2003
self.server_address = (self.server_address[0],
2004
0)
2506
self.server_address = (self.server_address[0], 0)
2005
2507
# if self.interface:
2006
2508
# self.server_address = (self.server_address[0],
2007
2509
# 0, # port
2013
2515
2014
2516
class MandosServer(IPv6_TCPServer):
2015
2517
"""Mandos server.
2016
2518
2017
2519
Attributes:
2018
2520
clients: set of Client objects
2019
2521
gnutls_priority GnuTLS priority string
2020
2522
use_dbus: Boolean; to emit D-Bus signals or not
2021
2022
Assumes a gobject.MainLoop event loop.
2523
2524
Assumes a GLib.MainLoop event loop.
2023
2525
"""
2526
2024
2527
def __init__(self, server_address, RequestHandlerClass,
2025
interface=None, use_ipv6=True, clients=None,
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
2528
interface=None,
2529
use_ipv6=True,
2530
clients=None,
2531
gnutls_priority=None,
2532
use_dbus=True,
2533
socketfd=None):
2027
2534
self.enabled = False
2028
2535
self.clients = clients
2029
2536
if self.clients is None:
2032
2539
self.gnutls_priority = gnutls_priority
2033
2540
IPv6_TCPServer.__init__(self, server_address,
2034
2541
RequestHandlerClass,
2035
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
2542
interface=interface,
2543
use_ipv6=use_ipv6,
2544
socketfd=socketfd)
2545
2038
2546
def server_activate(self):
2039
2547
if self.enabled:
2040
2548
return socketserver.TCPServer.server_activate(self)
2041
2549
2042
2550
def enable(self):
2043
2551
self.enabled = True
2044
2552
2045
2553
def add_pipe(self, parent_pipe, proc):
2046
2554
# Call "handle_ipc" for both data and EOF events
2047
gobject.io_add_watch(parent_pipe.fileno(),
2048
gobject.IO_IN | gobject.IO_HUP,
2049
functools.partial(self.handle_ipc,
2050
parent_pipe =
2051
parent_pipe,
2052
proc = proc))
2053
2054
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2555
GLib.io_add_watch(
2556
parent_pipe.fileno(),
2557
GLib.IO_IN | GLib.IO_HUP,
2558
functools.partial(self.handle_ipc,
2559
parent_pipe=parent_pipe,
2560
proc=proc))
2561
2562
def handle_ipc(self, source, condition,
2563
parent_pipe=None,
2564
proc=None,
2565
client_object=None):
2056
2566
# error, or the other end of multiprocessing.Pipe has closed
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2567
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2058
2568
# Wait for other process to exit
2059
2569
proc.join()
2060
2570
return False
2061
2571
2062
2572
# Read a request from the child
2063
2573
request = parent_pipe.recv()
2064
2574
command = request[0]
2065
2575
2066
2576
if command == 'init':
2067
2577
fpr = request[1]
2068
2578
address = request[2]
2069
2070
for c in self.clients.itervalues():
2579
2580
for c in self.clients.values():
2071
2581
if c.fingerprint == fpr:
2072
2582
client = c
2073
2583
break
2080
2590
address[0])
2081
2591
parent_pipe.send(False)
2082
2592
return False
2083
2084
gobject.io_add_watch(parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2087
parent_pipe =
2088
parent_pipe,
2089
proc = proc,
2090
client_object =
2091
client))
2593
2594
GLib.io_add_watch(
2595
parent_pipe.fileno(),
2596
GLib.IO_IN | GLib.IO_HUP,
2597
functools.partial(self.handle_ipc,
2598
parent_pipe=parent_pipe,
2599
proc=proc,
2600
client_object=client))
2092
2601
parent_pipe.send(True)
2093
2602
# remove the old hook in favor of the new above hook on
2094
2603
# same fileno
2097
2606
funcname = request[1]
2098
2607
args = request[2]
2099
2608
kwargs = request[3]
2100
2609
2101
2610
parent_pipe.send(('data', getattr(client_object,
2102
2611
funcname)(*args,
2103
**kwargs)))
2104
2612
**kwargs)))
2613
2105
2614
if command == 'getattr':
2106
2615
attrname = request[1]
2107
if callable(client_object.__getattribute__(attrname)):
2108
parent_pipe.send(('function',))
2616
if isinstance(client_object.__getattribute__(attrname),
2617
collections.Callable):
2618
parent_pipe.send(('function', ))
2109
2619
else:
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
2112
2620
parent_pipe.send((
2621
'data', client_object.__getattribute__(attrname)))
2622
2113
2623
if command == 'setattr':
2114
2624
attrname = request[1]
2115
2625
value = request[2]
2116
2626
setattr(client_object, attrname, value)
2117
2627
2118
2628
return True
2119
2629
2120
2630
2121
2631
def rfc3339_duration_to_delta(duration):
2122
2632
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2123
2633
2124
2634
>>> rfc3339_duration_to_delta("P7D")
2125
2635
datetime.timedelta(7)
2126
2636
>>> rfc3339_duration_to_delta("PT60S")
2136
2646
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
2647
datetime.timedelta(1, 200)
2138
2648
"""
2139
2649
2140
2650
# Parsing an RFC 3339 duration with regular expressions is not
2141
2651
# possible - there would have to be multiple places for the same
2142
2652
# values, like seconds. The current code, while more esoteric, is
2143
2653
# cleaner without depending on a parsing library. If Python had a
2144
2654
# built-in library for parsing we would use it, but we'd like to
2145
2655
# avoid excessive use of external libraries.
2146
2656
2147
2657
# New type for defining tokens, syntax, and semantics all-in-one
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2152
# containing digits
2153
"value", # datetime.timedelta or
2154
# None
2155
"followers")) # Tokens valid after
2156
# this token
2658
Token = collections.namedtuple("Token", (
2659
"regexp", # To match token; if "value" is not None, must have
2660
# a "group" containing digits
2661
"value", # datetime.timedelta or None
2662
"followers")) # Tokens valid after this token
2157
2663
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
2664
# the "duration" ABNF definition in RFC 3339, Appendix A.
2159
2665
token_end = Token(re.compile(r"$"), None, frozenset())
2160
2666
token_second = Token(re.compile(r"(\d+)S"),
2161
2667
datetime.timedelta(seconds=1),
2162
frozenset((token_end,)))
2668
frozenset((token_end, )))
2163
2669
token_minute = Token(re.compile(r"(\d+)M"),
2164
2670
datetime.timedelta(minutes=1),
2165
2671
frozenset((token_second, token_end)))
2181
2687
frozenset((token_month, token_end)))
2182
2688
token_week = Token(re.compile(r"(\d+)W"),
2183
2689
datetime.timedelta(weeks=1),
2184
frozenset((token_end,)))
2690
frozenset((token_end, )))
2185
2691
token_duration = Token(re.compile(r"P"), None,
2186
2692
frozenset((token_year, token_month,
2187
2693
token_day, token_time,
2188
2694
token_week)))
2189
# Define starting values
2190
value = datetime.timedelta() # Value so far
2695
# Define starting values:
2696
# Value so far
2697
value = datetime.timedelta()
2191
2698
found_token = None
2192
followers = frozenset((token_duration,)) # Following valid tokens
2193
s = duration # String left to parse
2699
# Following valid tokens
2700
followers = frozenset((token_duration, ))
2701
# String left to parse
2702
s = duration
2194
2703
# Loop until end token is found
2195
2704
while found_token is not token_end:
2196
2705
# Search for any currently valid tokens
2212
2721
break
2213
2722
else:
2214
2723
# No currently valid tokens were found
2215
raise ValueError("Invalid RFC 3339 duration")
2724
raise ValueError("Invalid RFC 3339 duration: {!r}"
2725
.format(duration))
2216
2726
# End token found
2217
2727
return value
2218
2728
2219
2729
2220
2730
def string_to_delta(interval):
2221
2731
"""Parse a string and return a datetime.timedelta
2222
2732
2223
2733
>>> string_to_delta('7d')
2224
2734
datetime.timedelta(7)
2225
2735
>>> string_to_delta('60s')
2233
2743
>>> string_to_delta('5m 30s')
2234
2744
datetime.timedelta(0, 330)
2235
2745
"""
2236
2746
2237
2747
try:
2238
2748
return rfc3339_duration_to_delta(interval)
2239
2749
except ValueError:
2240
2750
pass
2241
2751
2242
2752
timevalue = datetime.timedelta(0)
2243
2753
for s in interval.split():
2244
2754
try:
2255
2765
elif suffix == "w":
2256
2766
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2257
2767
else:
2258
raise ValueError("Unknown suffix {!r}"
2259
.format(suffix))
2768
raise ValueError("Unknown suffix {!r}".format(suffix))
2260
2769
except IndexError as e:
2261
2770
raise ValueError(*(e.args))
2262
2771
timevalue += delta
2263
2772
return timevalue
2264
2773
2265
2774
2266
def daemon(nochdir = False, noclose = False):
2775
def daemon(nochdir=False, noclose=False):
2267
2776
"""See daemon(3). Standard BSD Unix function.
2268
2777
2269
2778
This should really exist as os.daemon, but it doesn't (yet)."""
2270
2779
if os.fork():
2271
2780
sys.exit()
2278
2787
# Close all standard open file descriptors
2279
2788
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2280
2789
if not stat.S_ISCHR(os.fstat(null).st_mode):
2281
raise OSError(errno.ENODEV, "{} not a character device"
2790
raise OSError(errno.ENODEV,
2791
"{} not a character device"
2282
2792
.format(os.devnull))
2283
2793
os.dup2(null, sys.stdin.fileno())
2284
2794
os.dup2(null, sys.stdout.fileno())
2288
2798
2289
2799
2290
2800
def main():
2291
2801
2292
2802
##################################################################
2293
2803
# Parsing of options, both command line and config file
2294
2804
2295
2805
parser = argparse.ArgumentParser()
2296
2806
parser.add_argument("-v", "--version", action="version",
2297
version = "%(prog)s {}".format(version),
2807
version="%(prog)s {}".format(version),
2298
2808
help="show version number and exit")
2299
2809
parser.add_argument("-i", "--interface", metavar="IF",
2300
2810
help="Bind to interface IF")
2336
2846
parser.add_argument("--no-zeroconf", action="store_false",
2337
2847
dest="zeroconf", help="Do not use Zeroconf",
2338
2848
default=None)
2339
2849
2340
2850
options = parser.parse_args()
2341
2851
2342
2852
if options.check:
2343
2853
import doctest
2344
2854
fail_count, test_count = doctest.testmod()
2345
2855
sys.exit(os.EX_OK if fail_count == 0 else 1)
2346
2856
2347
2857
# Default values for config file for server-global settings
2348
server_defaults = { "interface": "",
2349
"address": "",
2350
"port": "",
2351
"debug": "False",
2352
"priority":
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2354
"servicename": "Mandos",
2355
"use_dbus": "True",
2356
"use_ipv6": "True",
2357
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
"zeroconf": "True",
2363
}
2364
2858
server_defaults = {"interface": "",
2859
"address": "",
2860
"port": "",
2861
"debug": "False",
2862
"priority":
2863
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2864
":+SIGN-DSA-SHA256",
2865
"servicename": "Mandos",
2866
"use_dbus": "True",
2867
"use_ipv6": "True",
2868
"debuglevel": "",
2869
"restore": "True",
2870
"socket": "",
2871
"statedir": "/var/lib/mandos",
2872
"foreground": "False",
2873
"zeroconf": "True",
2874
}
2875
2365
2876
# Parse config file for server-global settings
2366
2877
server_config = configparser.SafeConfigParser(server_defaults)
2367
2878
del server_defaults
2368
server_config.read(os.path.join(options.configdir,
2369
"mandos.conf"))
2879
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2370
2880
# Convert the SafeConfigParser object to a dict
2371
2881
server_settings = server_config.defaults()
2372
2882
# Use the appropriate methods on the non-string config options
2386
2896
server_settings["socket"] = os.dup(server_settings
2387
2897
["socket"])
2388
2898
del server_config
2389
2899
2390
2900
# Override the settings from the config file with command line
2391
2901
# options, if set.
2392
2902
for option in ("interface", "address", "port", "debug",
2393
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
2903
"priority", "servicename", "configdir", "use_dbus",
2904
"use_ipv6", "debuglevel", "restore", "statedir",
2905
"socket", "foreground", "zeroconf"):
2396
2906
value = getattr(options, option)
2397
2907
if value is not None:
2398
2908
server_settings[option] = value
2410
2920
if server_settings["debug"]:
2411
2921
server_settings["foreground"] = True
2412
2922
# Now we have our good server settings in "server_settings"
2413
2923
2414
2924
##################################################################
2415
2416
if (not server_settings["zeroconf"] and
2417
not (server_settings["port"]
2418
or server_settings["socket"] != "")):
2419
parser.error("Needs port or socket to work without"
2420
" Zeroconf")
2421
2925
2926
if (not server_settings["zeroconf"]
2927
and not (server_settings["port"]
2928
or server_settings["socket"] != "")):
2929
parser.error("Needs port or socket to work without Zeroconf")
2930
2422
2931
# For convenience
2423
2932
debug = server_settings["debug"]
2424
2933
debuglevel = server_settings["debuglevel"]
2428
2937
stored_state_file)
2429
2938
foreground = server_settings["foreground"]
2430
2939
zeroconf = server_settings["zeroconf"]
2431
2940
2432
2941
if debug:
2433
2942
initlogger(debug, logging.DEBUG)
2434
2943
else:
2437
2946
else:
2438
2947
level = getattr(logging, debuglevel.upper())
2439
2948
initlogger(debug, level)
2440
2949
2441
2950
if server_settings["servicename"] != "Mandos":
2442
syslogger.setFormatter(logging.Formatter
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
2446
["servicename"])))
2447
2951
syslogger.setFormatter(
2952
logging.Formatter('Mandos ({}) [%(process)d]:'
2953
' %(levelname)s: %(message)s'.format(
2954
server_settings["servicename"])))
2955
2448
2956
# Parse config file with clients
2449
2957
client_config = configparser.SafeConfigParser(Client
2450
2958
.client_defaults)
2451
2959
client_config.read(os.path.join(server_settings["configdir"],
2452
2960
"clients.conf"))
2453
2961
2454
2962
global mandos_dbus_service
2455
2963
mandos_dbus_service = None
2456
2964
2457
2965
socketfd = None
2458
2966
if server_settings["socket"] != "":
2459
2967
socketfd = server_settings["socket"]
2460
tcp_server = MandosServer((server_settings["address"],
2461
server_settings["port"]),
2462
ClientHandler,
2463
interface=(server_settings["interface"]
2464
or None),
2465
use_ipv6=use_ipv6,
2466
gnutls_priority=
2467
server_settings["priority"],
2468
use_dbus=use_dbus,
2469
socketfd=socketfd)
2968
tcp_server = MandosServer(
2969
(server_settings["address"], server_settings["port"]),
2970
ClientHandler,
2971
interface=(server_settings["interface"] or None),
2972
use_ipv6=use_ipv6,
2973
gnutls_priority=server_settings["priority"],
2974
use_dbus=use_dbus,
2975
socketfd=socketfd)
2470
2976
if not foreground:
2471
2977
pidfilename = "/run/mandos.pid"
2472
2978
if not os.path.isdir("/run/."):
2473
2979
pidfilename = "/var/run/mandos.pid"
2474
2980
pidfile = None
2475
2981
try:
2476
pidfile = open(pidfilename, "w")
2982
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2477
2983
except IOError as e:
2478
2984
logger.error("Could not open file %r", pidfilename,
2479
2985
exc_info=e)
2480
2481
for name in ("_mandos", "mandos", "nobody"):
2986
2987
for name, group in (("_mandos", "_mandos"),
2988
("mandos", "mandos"),
2989
("nobody", "nogroup")):
2482
2990
try:
2483
2991
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
2992
gid = pwd.getpwnam(group).pw_gid
2485
2993
break
2486
2994
except KeyError:
2487
2995
continue
2491
2999
try:
2492
3000
os.setgid(gid)
2493
3001
os.setuid(uid)
3002
if debug:
3003
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3004
gid))
2494
3005
except OSError as error:
3006
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3007
.format(uid, gid, os.strerror(error.errno)))
2495
3008
if error.errno != errno.EPERM:
2496
3009
raise
2497
3010
2498
3011
if debug:
2499
3012
# Enable all possible GnuTLS debugging
2500
3013
2501
3014
# "Use a log level over 10 to enable all debugging options."
2502
3015
# - GnuTLS manual
2503
gnutls.library.functions.gnutls_global_set_log_level(11)
2504
2505
@gnutls.library.types.gnutls_log_func
3016
gnutls.global_set_log_level(11)
3017
3018
@gnutls.log_func
2506
3019
def debug_gnutls(level, string):
2507
3020
logger.debug("GnuTLS: %s", string[:-1])
2508
2509
(gnutls.library.functions
2510
.gnutls_global_set_log_function(debug_gnutls))
2511
3021
3022
gnutls.global_set_log_function(debug_gnutls)
3023
2512
3024
# Redirect stdin so all checkers get /dev/null
2513
3025
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2514
3026
os.dup2(null, sys.stdin.fileno())
2515
3027
if null > 2:
2516
3028
os.close(null)
2517
3029
2518
3030
# Need to fork before connecting to D-Bus
2519
3031
if not foreground:
2520
3032
# Close all input and output, do double fork, etc.
2521
3033
daemon()
2522
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
2526
3034
3035
# multiprocessing will use threads, so before we use GLib we need
3036
# to inform GLib that threads will be used.
3037
GLib.threads_init()
3038
2527
3039
global main_loop
2528
3040
# From the Avahi example code
2529
3041
DBusGMainLoop(set_as_default=True)
2530
main_loop = gobject.MainLoop()
3042
main_loop = GLib.MainLoop()
2531
3043
bus = dbus.SystemBus()
2532
3044
# End of Avahi example code
2533
3045
if use_dbus:
2534
3046
try:
2535
3047
bus_name = dbus.service.BusName("se.recompile.Mandos",
2536
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2539
do_not_queue=True))
2540
except dbus.exceptions.NameExistsException as e:
3048
bus,
3049
do_not_queue=True)
3050
old_bus_name = dbus.service.BusName(
3051
"se.bsnet.fukt.Mandos", bus,
3052
do_not_queue=True)
3053
except dbus.exceptions.DBusException as e:
2541
3054
logger.error("Disabling D-Bus:", exc_info=e)
2542
3055
use_dbus = False
2543
3056
server_settings["use_dbus"] = False
2544
3057
tcp_server.use_dbus = False
2545
3058
if zeroconf:
2546
3059
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
3060
service = AvahiServiceToSyslog(
3061
name=server_settings["servicename"],
3062
servicetype="_mandos._tcp",
3063
protocol=protocol,
3064
bus=bus)
2551
3065
if server_settings["interface"]:
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
2554
.encode("utf-8")))
2555
3066
service.interface = if_nametoindex(
3067
server_settings["interface"].encode("utf-8"))
3068
2556
3069
global multiprocessing_manager
2557
3070
multiprocessing_manager = multiprocessing.Manager()
2558
3071
2559
3072
client_class = Client
2560
3073
if use_dbus:
2561
client_class = functools.partial(ClientDBus, bus = bus)
2562
3074
client_class = functools.partial(ClientDBus, bus=bus)
3075
2563
3076
client_settings = Client.config_parser(client_config)
2564
3077
old_client_settings = {}
2565
3078
clients_data = {}
2566
3079
2567
3080
# This is used to redirect stdout and stderr for checker processes
2568
3081
global wnull
2569
wnull = open(os.devnull, "w") # A writable /dev/null
3082
wnull = open(os.devnull, "w") # A writable /dev/null
2570
3083
# Only used if server is running in foreground but not in debug
2571
3084
# mode
2572
3085
if debug or not foreground:
2573
3086
wnull.close()
2574
3087
2575
3088
# Get client data and settings from last running state.
2576
3089
if server_settings["restore"]:
2577
3090
try:
2578
3091
with open(stored_state_path, "rb") as stored_state:
2579
clients_data, old_client_settings = (pickle.load
2580
(stored_state))
3092
if sys.version_info.major == 2:
3093
clients_data, old_client_settings = pickle.load(
3094
stored_state)
3095
else:
3096
bytes_clients_data, bytes_old_client_settings = (
3097
pickle.load(stored_state, encoding="bytes"))
3098
# Fix bytes to strings
3099
# clients_data
3100
# .keys()
3101
clients_data = {(key.decode("utf-8")
3102
if isinstance(key, bytes)
3103
else key): value
3104
for key, value in
3105
bytes_clients_data.items()}
3106
del bytes_clients_data
3107
for key in clients_data:
3108
value = {(k.decode("utf-8")
3109
if isinstance(k, bytes) else k): v
3110
for k, v in
3111
clients_data[key].items()}
3112
clients_data[key] = value
3113
# .client_structure
3114
value["client_structure"] = [
3115
(s.decode("utf-8")
3116
if isinstance(s, bytes)
3117
else s) for s in
3118
value["client_structure"]]
3119
# .name & .host
3120
for k in ("name", "host"):
3121
if isinstance(value[k], bytes):
3122
value[k] = value[k].decode("utf-8")
3123
# old_client_settings
3124
# .keys()
3125
old_client_settings = {
3126
(key.decode("utf-8")
3127
if isinstance(key, bytes)
3128
else key): value
3129
for key, value in
3130
bytes_old_client_settings.items()}
3131
del bytes_old_client_settings
3132
# .host
3133
for value in old_client_settings.values():
3134
if isinstance(value["host"], bytes):
3135
value["host"] = (value["host"]
3136
.decode("utf-8"))
2581
3137
os.remove(stored_state_path)
2582
3138
except IOError as e:
2583
3139
if e.errno == errno.ENOENT:
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
3140
logger.warning("Could not load persistent state:"
3141
" {}".format(os.strerror(e.errno)))
2586
3142
else:
2587
3143
logger.critical("Could not load persistent state:",
2588
3144
exc_info=e)
2589
3145
raise
2590
3146
except EOFError as e:
2591
3147
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
2593
3148
"EOFError:",
3149
exc_info=e)
3150
2594
3151
with PGPEngine() as pgp:
2595
3152
for client_name, client in clients_data.items():
2596
3153
# Skip removed clients
2597
3154
if client_name not in client_settings:
2598
3155
continue
2599
3156
2600
3157
# Decide which value to use after restoring saved state.
2601
3158
# We have three different values: Old config file,
2602
3159
# new config file, and saved state.
2607
3164
# For each value in new config, check if it
2608
3165
# differs from the old config value (Except for
2609
3166
# the "secret" attribute)
2610
if (name != "secret" and
2611
value != old_client_settings[client_name]
2612
[name]):
3167
if (name != "secret"
3168
and (value !=
3169
old_client_settings[client_name][name])):
2613
3170
client[name] = value
2614
3171
except KeyError:
2615
3172
pass
2616
3173
2617
3174
# Clients who has passed its expire date can still be
2618
# enabled if its last checker was successful. Clients
3175
# enabled if its last checker was successful. A Client
2619
3176
# whose checker succeeded before we stored its state is
2620
3177
# assumed to have successfully run all checkers during
2621
3178
# downtime.
2624
3181
if not client["last_checked_ok"]:
2625
3182
logger.warning(
2626
3183
"disabling client {} - Client never "
2627
"performed a successful checker"
2628
.format(client_name))
3184
"performed a successful checker".format(
3185
client_name))
2629
3186
client["enabled"] = False
2630
3187
elif client["last_checker_status"] != 0:
2631
3188
logger.warning(
2632
3189
"disabling client {} - Client last"
2633
" checker failed with error code {}"
2634
.format(client_name,
2635
client["last_checker_status"]))
3190
" checker failed with error code"
3191
" {}".format(
3192
client_name,
3193
client["last_checker_status"]))
2636
3194
client["enabled"] = False
2637
3195
else:
2638
client["expires"] = (datetime.datetime
2639
.utcnow()
2640
+ client["timeout"])
3196
client["expires"] = (
3197
datetime.datetime.utcnow()
3198
+ client["timeout"])
2641
3199
logger.debug("Last checker succeeded,"
2642
" keeping {} enabled"
2643
.format(client_name))
3200
" keeping {} enabled".format(
3201
client_name))
2644
3202
try:
2645
client["secret"] = (
2646
pgp.decrypt(client["encrypted_secret"],
2647
client_settings[client_name]
2648
["secret"]))
3203
client["secret"] = pgp.decrypt(
3204
client["encrypted_secret"],
3205
client_settings[client_name]["secret"])
2649
3206
except PGPError:
2650
3207
# If decryption fails, we use secret from new settings
2651
logger.debug("Failed to decrypt {} old secret"
2652
.format(client_name))
2653
client["secret"] = (
2654
client_settings[client_name]["secret"])
2655
3208
logger.debug("Failed to decrypt {} old secret".format(
3209
client_name))
3210
client["secret"] = (client_settings[client_name]
3211
["secret"])
3212
2656
3213
# Add/remove clients based on new changes made to config
2657
3214
for client_name in (set(old_client_settings)
2658
3215
- set(client_settings)):
2660
3217
for client_name in (set(client_settings)
2661
3218
- set(old_client_settings)):
2662
3219
clients_data[client_name] = client_settings[client_name]
2663
3220
2664
3221
# Create all client objects
2665
3222
for client_name, client in clients_data.items():
2666
3223
tcp_server.clients[client_name] = client_class(
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
2669
3224
name=client_name,
3225
settings=client,
3226
server_settings=server_settings)
3227
2670
3228
if not tcp_server.clients:
2671
3229
logger.warning("No clients defined")
2672
3230
2673
3231
if not foreground:
2674
3232
if pidfile is not None:
3233
pid = os.getpid()
2675
3234
try:
2676
3235
with pidfile:
2677
pid = os.getpid()
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
3236
print(pid, file=pidfile)
2679
3237
except IOError:
2680
3238
logger.error("Could not write to file %r with PID %d",
2681
3239
pidfilename, pid)
2682
3240
del pidfile
2683
3241
del pidfilename
2684
2685
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2687
3242
3243
for termsig in (signal.SIGHUP, signal.SIGTERM):
3244
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3245
lambda: main_loop.quit() and False)
3246
2688
3247
if use_dbus:
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
3248
3249
@alternate_dbus_interfaces(
3250
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3251
class MandosDBusService(DBusObjectWithObjectManager):
2692
3252
"""A D-Bus proxy object"""
3253
2693
3254
def __init__(self):
2694
3255
dbus.service.Object.__init__(self, bus, "/")
3256
2695
3257
_interface = "se.recompile.Mandos"
2696
2697
@dbus_interface_annotations(_interface)
2698
def _foo(self):
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
2701
"false"}
2702
3258
2703
3259
@dbus.service.signal(_interface, signature="o")
2704
3260
def ClientAdded(self, objpath):
2705
3261
"D-Bus signal"
2706
3262
pass
2707
3263
2708
3264
@dbus.service.signal(_interface, signature="ss")
2709
3265
def ClientNotFound(self, fingerprint, address):
2710
3266
"D-Bus signal"
2711
3267
pass
2712
3268
3269
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3270
"true"})
2713
3271
@dbus.service.signal(_interface, signature="os")
2714
3272
def ClientRemoved(self, objpath, name):
2715
3273
"D-Bus signal"
2716
3274
pass
2717
3275
3276
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3277
"true"})
2718
3278
@dbus.service.method(_interface, out_signature="ao")
2719
3279
def GetAllClients(self):
2720
3280
"D-Bus method"
2721
return dbus.Array(c.dbus_object_path
2722
for c in
2723
tcp_server.clients.itervalues())
2724
3281
return dbus.Array(c.dbus_object_path for c in
3282
tcp_server.clients.values())
3283
3284
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3285
"true"})
2725
3286
@dbus.service.method(_interface,
2726
3287
out_signature="a{oa{sv}}")
2727
3288
def GetAllClientsWithProperties(self):
2728
3289
"D-Bus method"
2729
3290
return dbus.Dictionary(
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
3291
{c.dbus_object_path: c.GetAll(
3292
"se.recompile.Mandos.Client")
3293
for c in tcp_server.clients.values()},
2732
3294
signature="oa{sv}")
2733
3295
2734
3296
@dbus.service.method(_interface, in_signature="o")
2735
3297
def RemoveClient(self, object_path):
2736
3298
"D-Bus method"
2737
for c in tcp_server.clients.itervalues():
3299
for c in tcp_server.clients.values():
2738
3300
if c.dbus_object_path == object_path:
2739
3301
del tcp_server.clients[c.name]
2740
3302
c.remove_from_connection()
2741
# Don't signal anything except ClientRemoved
3303
# Don't signal the disabling
2742
3304
c.disable(quiet=True)
2743
# Emit D-Bus signal
2744
self.ClientRemoved(object_path, c.name)
3305
# Emit D-Bus signal for removal
3306
self.client_removed_signal(c)
2745
3307
return
2746
3308
raise KeyError(object_path)
2747
3309
2748
3310
del _interface
2749
3311
3312
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3313
out_signature="a{oa{sa{sv}}}")
3314
def GetManagedObjects(self):
3315
"""D-Bus method"""
3316
return dbus.Dictionary(
3317
{client.dbus_object_path:
3318
dbus.Dictionary(
3319
{interface: client.GetAll(interface)
3320
for interface in
3321
client._get_all_interface_names()})
3322
for client in tcp_server.clients.values()})
3323
3324
def client_added_signal(self, client):
3325
"""Send the new standard signal and the old signal"""
3326
if use_dbus:
3327
# New standard signal
3328
self.InterfacesAdded(
3329
client.dbus_object_path,
3330
dbus.Dictionary(
3331
{interface: client.GetAll(interface)
3332
for interface in
3333
client._get_all_interface_names()}))
3334
# Old signal
3335
self.ClientAdded(client.dbus_object_path)
3336
3337
def client_removed_signal(self, client):
3338
"""Send the new standard signal and the old signal"""
3339
if use_dbus:
3340
# New standard signal
3341
self.InterfacesRemoved(
3342
client.dbus_object_path,
3343
client._get_all_interface_names())
3344
# Old signal
3345
self.ClientRemoved(client.dbus_object_path,
3346
client.name)
3347
2750
3348
mandos_dbus_service = MandosDBusService()
2751
3349
3350
# Save modules to variables to exempt the modules from being
3351
# unloaded before the function registered with atexit() is run.
3352
mp = multiprocessing
3353
wn = wnull
3354
2752
3355
def cleanup():
2753
3356
"Cleanup function; run on exit"
2754
3357
if zeroconf:
2755
3358
service.cleanup()
2756
2757
multiprocessing.active_children()
2758
wnull.close()
3359
3360
mp.active_children()
3361
wn.close()
2759
3362
if not (tcp_server.clients or client_settings):
2760
3363
return
2761
3364
2762
3365
# Store client before exiting. Secrets are encrypted with key
2763
3366
# based on what config file has. If config file is
2764
3367
# removed/edited, old secret will thus be unrecovable.
2765
3368
clients = {}
2766
3369
with PGPEngine() as pgp:
2767
for client in tcp_server.clients.itervalues():
3370
for client in tcp_server.clients.values():
2768
3371
key = client_settings[client.name]["secret"]
2769
3372
client.encrypted_secret = pgp.encrypt(client.secret,
2770
3373
key)
2771
3374
client_dict = {}
2772
3375
2773
3376
# A list of attributes that can not be pickled
2774
3377
# + secret.
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
3378
exclude = {"bus", "changedstate", "secret",
3379
"checker", "server_settings"}
3380
for name, typ in inspect.getmembers(dbus.service
3381
.Object):
2779
3382
exclude.add(name)
2780
3383
2781
3384
client_dict["encrypted_secret"] = (client
2782
3385
.encrypted_secret)
2783
3386
for attr in client.client_structure:
2784
3387
if attr not in exclude:
2785
3388
client_dict[attr] = getattr(client, attr)
2786
3389
2787
3390
clients[client.name] = client_dict
2788
3391
del client_settings[client.name]["secret"]
2789
3392
2790
3393
try:
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
3394
with tempfile.NamedTemporaryFile(
3395
mode='wb',
3396
suffix=".pickle",
3397
prefix='clients-',
3398
dir=os.path.dirname(stored_state_path),
3399
delete=False) as stored_state:
3400
pickle.dump((clients, client_settings), stored_state,
3401
protocol=2)
3402
tempname = stored_state.name
2797
3403
os.rename(tempname, stored_state_path)
2798
3404
except (IOError, OSError) as e:
2799
3405
if not debug:
2808
3414
logger.warning("Could not save persistent state:",
2809
3415
exc_info=e)
2810
3416
raise
2811
3417
2812
3418
# Delete all clients, and settings from config
2813
3419
while tcp_server.clients:
2814
3420
name, client = tcp_server.clients.popitem()
2815
3421
if use_dbus:
2816
3422
client.remove_from_connection()
2817
# Don't signal anything except ClientRemoved
3423
# Don't signal the disabling
2818
3424
client.disable(quiet=True)
3425
# Emit D-Bus signal for removal
2819
3426
if use_dbus:
2820
# Emit D-Bus signal
2821
mandos_dbus_service.ClientRemoved(client
2822
.dbus_object_path,
2823
client.name)
3427
mandos_dbus_service.client_removed_signal(client)
2824
3428
client_settings.clear()
2825
3429
2826
3430
atexit.register(cleanup)
2827
2828
for client in tcp_server.clients.itervalues():
3431
3432
for client in tcp_server.clients.values():
2829
3433
if use_dbus:
2830
# Emit D-Bus signal
2831
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3434
# Emit D-Bus signal for adding
3435
mandos_dbus_service.client_added_signal(client)
2832
3436
# Need to initiate checking of clients
2833
3437
if client.enabled:
2834
3438
client.init_checker()
2835
3439
2836
3440
tcp_server.enable()
2837
3441
tcp_server.server_activate()
2838
3442
2839
3443
# Find out what port we got
2840
3444
if zeroconf:
2841
3445
service.port = tcp_server.socket.getsockname()[1]
2846
3450
else: # IPv4
2847
3451
logger.info("Now listening on address %r, port %d",
2848
3452
*tcp_server.socket.getsockname())
2849
2850
#service.interface = tcp_server.socket.getsockname()[3]
2851
3453
3454
# service.interface = tcp_server.socket.getsockname()[3]
3455
2852
3456
try:
2853
3457
if zeroconf:
2854
3458
# From the Avahi example code
2859
3463
cleanup()
2860
3464
sys.exit(1)
2861
3465
# End of Avahi example code
2862
2863
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2864
lambda *args, **kwargs:
2865
(tcp_server.handle_request
2866
(*args[2:], **kwargs) or True))
2867
3466
3467
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3468
lambda *args, **kwargs:
3469
(tcp_server.handle_request
3470
(*args[2:], **kwargs) or True))
3471
2868
3472
logger.debug("Starting main loop")
2869
3473
main_loop.run()
2870
3474
except AvahiError as error:
2879
3483
# Must run before the D-Bus bus name gets deregistered
2880
3484
cleanup()
2881
3485
3486
2882
3487
if __name__ == '__main__':
2883
3488
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0