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- Committer: Teddy Hogeborn
- Date: 2012-01-01 20:45:53 UTC
- Revision ID: teddy@recompile.se-20120101204553-f1zlty873gswtf5n
* README: Hint that the intro(8mandos) manual page is in the server
package.
package.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
37
import SocketServer as socketserver
43
38
import socket
44
39
import argparse
45
40
import datetime
46
41
import errno
47
try:
48
import ConfigParser as configparser
49
except ImportError:
50
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
49
import sys
52
50
import re
53
51
import os
62
60
import struct
63
61
import fcntl
64
62
import functools
65
try:
66
import cPickle as pickle
67
except ImportError:
68
import pickle
63
import cPickle as pickle
69
64
import multiprocessing
70
65
import types
71
66
import binascii
72
67
import tempfile
73
import itertools
74
import collections
75
import codecs
76
68
77
69
import dbus
78
70
import dbus.service
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
71
import gobject
83
72
import avahi
84
73
from dbus.mainloop.glib import DBusGMainLoop
85
74
import ctypes
86
75
import ctypes.util
87
76
import xml.dom.minidom
88
77
import inspect
78
import GnuPGInterface
89
79
90
80
try:
91
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
85
except ImportError:
96
86
SO_BINDTODEVICE = None
97
87
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.1"
88
version = "1.5.0"
102
89
stored_state_file = "clients.pickle"
103
90
104
91
logger = logging.getLogger()
105
syslogger = None
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
106
95
107
96
try:
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
110
100
except (OSError, AttributeError):
111
112
101
def if_nametoindex(interface):
113
102
"Get an interface index the hard way, i.e. using fcntl()"
114
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
115
104
with contextlib.closing(socket.socket()) as s:
116
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
119
110
return interface_index
120
111
121
112
122
113
def initlogger(debug, level=logging.WARNING):
123
114
"""init logger and add loglevel"""
124
115
125
global syslogger
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
129
116
syslogger.setFormatter(logging.Formatter
130
117
('Mandos [%(process)d]: %(levelname)s:'
131
118
' %(message)s'))
148
135
149
136
class PGPEngine(object):
150
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
151
152
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
153
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
154
self.gpg = "gpg"
155
try:
156
output = subprocess.check_output(["gpgconf"])
157
for line in output.splitlines():
158
name, text, path = line.split(":")
159
if name == "gpg":
160
self.gpg = path
161
break
162
except OSError as e:
163
if e.errno != errno.ENOENT:
164
raise
165
self.gnupgargs = ['--batch',
166
'--homedir', self.tempdir,
167
'--force-mdc',
168
'--quiet',
169
'--no-use-agent']
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
170
147
171
148
def __enter__(self):
172
149
return self
173
150
174
def __exit__(self, exc_type, exc_value, traceback):
151
def __exit__ (self, exc_type, exc_value, traceback):
175
152
self._cleanup()
176
153
return False
177
154
194
171
def password_encode(self, password):
195
172
# Passphrase can not be empty and can not contain newlines or
196
173
# NUL bytes. So we prefix it and hex encode it.
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
203
return encoded
174
return b"mandos" + binascii.hexlify(password)
204
175
205
176
def encrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen([self.gpg, '--symmetric',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
220
raise PGPError(err)
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
221
191
return ciphertext
222
192
223
193
def decrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
228
passfile.flush()
229
proc = subprocess.Popen([self.gpg, '--decrypt',
230
'--passphrase-file',
231
passfile.name]
232
+ self.gnupgargs,
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
238
raise PGPError(err)
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
239
208
return decrypted_plaintext
240
209
241
210
211
242
212
class AvahiError(Exception):
243
213
def __init__(self, value, *args, **kwargs):
244
214
self.value = value
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
248
218
249
219
class AvahiServiceError(AvahiError):
250
220
pass
251
221
252
253
222
class AvahiGroupError(AvahiError):
254
223
pass
255
224
262
231
Used to optionally bind to the specified interface.
263
232
name: string; Example: 'Mandos'
264
233
type: string; Example: '_mandos._tcp'.
265
See <https://www.iana.org/assignments/service-names-port-numbers>
234
See <http://www.dns-sd.org/ServiceTypes.html>
266
235
port: integer; what port to announce
267
236
TXT: list of strings; TXT record for the service
268
237
domain: string; Domain to publish on, default to .local if empty.
274
243
server: D-Bus Server
275
244
bus: dbus.SystemBus()
276
245
"""
277
278
def __init__(self,
279
interface = avahi.IF_UNSPEC,
280
name = None,
281
servicetype = None,
282
port = None,
283
TXT = None,
284
domain = "",
285
host = "",
286
max_renames = 32768,
287
protocol = avahi.PROTO_UNSPEC,
288
bus = None):
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
289
250
self.interface = interface
290
251
self.name = name
291
252
self.type = servicetype
300
261
self.server = None
301
262
self.bus = bus
302
263
self.entry_group_state_changed_match = None
303
304
def rename(self, remove=True):
264
def rename(self):
305
265
"""Derived from the Avahi example code"""
306
266
if self.rename_count >= self.max_renames:
307
267
logger.critical("No suitable Zeroconf service name found"
308
268
" after %i retries, exiting.",
309
269
self.rename_count)
310
270
raise AvahiServiceError("Too many renames")
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
313
self.rename_count += 1
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
314
273
logger.info("Changing Zeroconf service name to %r ...",
315
274
self.name)
316
if remove:
317
self.remove()
275
self.remove()
318
276
try:
319
277
self.add()
320
278
except dbus.exceptions.DBusException as error:
321
if (error.get_dbus_name()
322
== "org.freedesktop.Avahi.CollisionError"):
323
logger.info("Local Zeroconf service name collision.")
324
return self.rename(remove=False)
325
else:
326
logger.critical("D-Bus Exception", exc_info=error)
327
self.cleanup()
328
os._exit(1)
329
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
330
283
def remove(self):
331
284
"""Derived from the Avahi example code"""
332
285
if self.entry_group_state_changed_match is not None:
334
287
self.entry_group_state_changed_match = None
335
288
if self.group is not None:
336
289
self.group.Reset()
337
338
290
def add(self):
339
291
"""Derived from the Avahi example code"""
340
292
self.remove()
357
309
dbus.UInt16(self.port),
358
310
avahi.string_array_to_txt_array(self.TXT))
359
311
self.group.Commit()
360
361
312
def entry_group_state_changed(self, state, error):
362
313
"""Derived from the Avahi example code"""
363
314
logger.debug("Avahi entry group state change: %i", state)
369
320
self.rename()
370
321
elif state == avahi.ENTRY_GROUP_FAILURE:
371
322
logger.critical("Avahi: Error in group state changed %s",
372
str(error))
373
raise AvahiGroupError("State changed: {!s}".format(error))
374
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
375
326
def cleanup(self):
376
327
"""Derived from the Avahi example code"""
377
328
if self.group is not None:
382
333
pass
383
334
self.group = None
384
335
self.remove()
385
386
336
def server_state_changed(self, state, error=None):
387
337
"""Derived from the Avahi example code"""
388
338
logger.debug("Avahi server state change: %i", state)
389
bad_states = {
390
avahi.SERVER_INVALID: "Zeroconf server invalid",
391
avahi.SERVER_REGISTERING: None,
392
avahi.SERVER_COLLISION: "Zeroconf server name collision",
393
avahi.SERVER_FAILURE: "Zeroconf server failure",
394
}
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
395
346
if state in bad_states:
396
347
if bad_states[state] is not None:
397
348
if error is None:
400
351
logger.error(bad_states[state] + ": %r", error)
401
352
self.cleanup()
402
353
elif state == avahi.SERVER_RUNNING:
403
try:
404
self.add()
405
except dbus.exceptions.DBusException as error:
406
if (error.get_dbus_name()
407
== "org.freedesktop.Avahi.CollisionError"):
408
logger.info("Local Zeroconf service name"
409
" collision.")
410
return self.rename(remove=False)
411
else:
412
logger.critical("D-Bus Exception", exc_info=error)
413
self.cleanup()
414
os._exit(1)
354
self.add()
415
355
else:
416
356
if error is None:
417
357
logger.debug("Unknown state: %r", state)
418
358
else:
419
359
logger.debug("Unknown state: %r: %r", state, error)
420
421
360
def activate(self):
422
361
"""Derived from the Avahi example code"""
423
362
if self.server is None:
427
366
follow_name_owner_changes=True),
428
367
avahi.DBUS_INTERFACE_SERVER)
429
368
self.server.connect_to_signal("StateChanged",
430
self.server_state_changed)
369
self.server_state_changed)
431
370
self.server_state_changed(self.server.GetState())
432
371
433
434
372
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
373
def rename(self):
436
374
"""Add the new name to the syslog messages"""
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
440
.format(self.name)))
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
441
380
return ret
442
381
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
447
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
451
def __init__(self):
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
454
# happens.
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
458
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
461
462
# Constants
463
E_SUCCESS = 0
464
E_INTERRUPTED = -52
465
E_AGAIN = -28
466
CRT_OPENPGP = 2
467
CLIENT = 2
468
SHUT_RDWR = 0
469
CRD_CERTIFICATE = 1
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
472
473
# Types
474
class session_int(ctypes.Structure):
475
_fields_ = []
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
478
_fields_ = []
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
486
_fields_ = []
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int #
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
493
494
# Exceptions
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
503
# gnutls.strerror()
504
self.code = code
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
508
message, *args)
509
510
class CertificateSecurityError(Error):
511
pass
512
513
# Classes
514
class Credentials(object):
515
def __init__(self):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
520
521
def __del__(self):
522
gnutls.certificate_free_credentials(self._c_object)
523
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
531
True)
532
self.socket = socket
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
537
ctypes.c_void_p))
538
self.credentials = credentials
539
540
def __del__(self):
541
gnutls.deinit(self._c_object)
542
543
def handshake(self):
544
return gnutls.handshake(self._c_object)
545
546
def send(self, data):
547
data = bytes(data)
548
data_len = len(data)
549
while data_len > 0:
550
data_len -= gnutls.record_send(self._c_object,
551
data[-data_len:],
552
data_len)
553
554
def bye(self):
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
556
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
561
if result >= 0:
562
return result
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
566
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
570
while result < 0:
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
574
return result
575
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
578
579
# Functions
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
584
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
588
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
592
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
595
ctypes.c_size_t]
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
598
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
604
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
609
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
613
ctypes.c_int]
614
handshake_set_private_extensions.restype = None
615
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
618
ctypes.c_void_p]
619
credentials_set.restype = _error_code
620
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
624
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
628
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
633
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
637
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
641
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
645
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
650
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
654
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
659
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
663
664
# All the function declarations below are from gnutls/openpgp.h
665
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
669
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
673
openpgp_crt_fmt_t]
674
openpgp_crt_import.restype = _error_code
675
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
680
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
684
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
688
ctypes.c_void_p,
689
ctypes.POINTER(
690
ctypes.c_size_t)]
691
openpgp_crt_get_fingerprint.restype = _error_code
692
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
696
gnutls = GnuTLS()
697
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
701
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
704
"""
705
connection.send(func(*args, **kwargs))
706
connection.close()
707
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
708
388
class Client(object):
709
389
"""A representation of a client host served by this server.
710
390
735
415
last_checked_ok: datetime.datetime(); (UTC) or None
736
416
last_checker_status: integer between 0 and 255 reflecting exit
737
417
status of last checker. -1 reflects crashed
738
checker, -2 means no checker completed yet.
739
last_checker_signal: The signal which killed the last checker, if
740
last_checker_status is -1
418
checker, or None.
741
419
last_enabled: datetime.datetime(); (UTC) or None
742
420
name: string; from the config file, used in log messages and
743
421
D-Bus identifiers
744
422
secret: bytestring; sent verbatim (over TLS) to client
745
423
timeout: datetime.timedelta(); How long from last_checked_ok
746
424
until this client is disabled
747
extended_timeout: extra long timeout when secret has been sent
425
extended_timeout: extra long timeout when password has been sent
748
426
runtime_expansions: Allowed attributes for runtime expansion.
749
427
expires: datetime.datetime(); time (UTC) when a client will be
750
428
disabled, or None
751
server_settings: The server_settings dict from main()
752
429
"""
753
430
754
431
runtime_expansions = ("approval_delay", "approval_duration",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
758
434
"last_enabled", "name", "timeout")
759
client_defaults = {
760
"timeout": "PT5M",
761
"extended_timeout": "PT15M",
762
"interval": "PT2M",
763
"checker": "fping -q -- %%(host)s",
764
"host": "",
765
"approval_delay": "PT0S",
766
"approval_duration": "PT1S",
767
"approved_by_default": "True",
768
"enabled": "True",
769
}
770
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
771
461
@staticmethod
772
462
def config_parser(config):
773
463
"""Construct a new dict of client settings of this form:
788
478
client["enabled"] = config.getboolean(client_name,
789
479
"enabled")
790
480
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
794
481
client["fingerprint"] = (section["fingerprint"].upper()
795
482
.replace(" ", ""))
796
483
if "secret" in section:
801
488
"rb") as secfile:
802
489
client["secret"] = secfile.read()
803
490
else:
804
raise TypeError("No secret or secfile for section {}"
805
.format(section))
491
raise TypeError("No secret or secfile for section %s"
492
% section)
806
493
client["timeout"] = string_to_delta(section["timeout"])
807
494
client["extended_timeout"] = string_to_delta(
808
495
section["extended_timeout"])
814
501
client["checker_command"] = section["checker"]
815
502
client["last_approval_request"] = None
816
503
client["last_checked_ok"] = None
817
client["last_checker_status"] = -2
504
client["last_checker_status"] = None
818
505
819
506
return settings
820
821
def __init__(self, settings, name = None, server_settings=None):
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
822
513
self.name = name
823
if server_settings is None:
824
server_settings = {}
825
self.server_settings = server_settings
826
514
# adding all client settings
827
for setting, value in settings.items():
515
for setting, value in settings.iteritems():
828
516
setattr(self, setting, value)
829
517
830
518
if self.enabled:
836
524
else:
837
525
self.last_enabled = None
838
526
self.expires = None
839
527
840
528
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
841
532
logger.debug(" Fingerprint: %s", self.fingerprint)
842
533
self.created = settings.get("created",
843
534
datetime.datetime.utcnow())
844
535
845
536
# attributes specific for this server instance
846
537
self.checker = None
847
538
self.checker_initiator_tag = None
850
541
self.current_checker_command = None
851
542
self.approved = None
852
543
self.approvals_pending = 0
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
857
549
if not attr.startswith("_")]
858
550
self.client_structure.append("client_structure")
859
551
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
862
556
if not name.startswith("_"):
863
557
self.client_structure.append(name)
864
558
872
566
if getattr(self, "enabled", False):
873
567
# Already enabled
874
568
return
569
self.send_changedstate()
875
570
self.expires = datetime.datetime.utcnow() + self.timeout
876
571
self.enabled = True
877
572
self.last_enabled = datetime.datetime.utcnow()
878
573
self.init_checker()
879
self.send_changedstate()
880
574
881
575
def disable(self, quiet=True):
882
576
"""Disable this client."""
883
577
if not getattr(self, "enabled", False):
884
578
return False
885
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
886
582
logger.info("Disabling client %s", self.name)
887
if getattr(self, "disable_initiator_tag", None) is not None:
583
if getattr(self, "disable_initiator_tag", False):
888
584
gobject.source_remove(self.disable_initiator_tag)
889
585
self.disable_initiator_tag = None
890
586
self.expires = None
891
if getattr(self, "checker_initiator_tag", None) is not None:
587
if getattr(self, "checker_initiator_tag", False):
892
588
gobject.source_remove(self.checker_initiator_tag)
893
589
self.checker_initiator_tag = None
894
590
self.stop_checker()
895
591
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
898
592
# Do not run this again if called by a gobject.timeout_add
899
593
return False
900
594
904
598
def init_checker(self):
905
599
# Schedule a new checker to be started an 'interval' from now,
906
600
# and every interval from then on.
907
if self.checker_initiator_tag is not None:
908
gobject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = gobject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
911
self.start_checker)
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
912
604
# Schedule a disable() when 'timeout' has passed
913
if self.disable_initiator_tag is not None:
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = gobject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
917
608
# Also start a new checker *right now*.
918
609
self.start_checker()
919
610
920
def checker_callback(self, source, condition, connection,
921
command):
611
def checker_callback(self, pid, condition, command):
922
612
"""The checker has completed, so take appropriate actions."""
923
613
self.checker_callback_tag = None
924
614
self.checker = None
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
927
connection.close()
928
929
if returncode >= 0:
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
932
617
if self.last_checker_status == 0:
933
618
logger.info("Checker for %(name)s succeeded",
934
619
vars(self))
935
620
self.checked_ok()
936
621
else:
937
logger.info("Checker for %(name)s failed", vars(self))
622
logger.info("Checker for %(name)s failed",
623
vars(self))
938
624
else:
939
625
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
941
626
logger.warning("Checker for %(name)s crashed?",
942
627
vars(self))
943
return False
944
945
def checked_ok(self):
946
"""Assert that the client has been seen, alive and well."""
947
self.last_checked_ok = datetime.datetime.utcnow()
948
self.last_checker_status = 0
949
self.last_checker_signal = None
950
self.bump_timeout()
951
952
def bump_timeout(self, timeout=None):
953
"""Bump up the timeout for this client."""
628
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
631
632
This should only be called when the client has been seen,
633
alive and well.
634
"""
954
635
if timeout is None:
955
636
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
956
638
if self.disable_initiator_tag is not None:
957
639
gobject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
959
640
if getattr(self, "enabled", False):
960
self.disable_initiator_tag = gobject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
962
644
self.expires = datetime.datetime.utcnow() + timeout
963
645
964
646
def need_approval(self):
970
652
If a checker already exists, leave it running and do
971
653
nothing."""
972
654
# The reason for not killing a running checker is that if we
973
# did that, and if a checker (for some reason) started running
974
# slowly and taking more than 'interval' time, then the client
975
# would inevitably timeout, since no checker would get a
976
# chance to run to completion. If we instead leave running
655
# did that, then if a checker (for some reason) started
656
# running slowly and taking more than 'interval' time, the
657
# client would inevitably timeout, since no checker would get
658
# a chance to run to completion. If we instead leave running
977
659
# checkers alone, the checker would have to take more time
978
660
# than 'timeout' for the client to be disabled, which is as it
979
661
# should be.
980
662
981
if self.checker is not None and not self.checker.is_alive():
982
logger.warning("Checker was not alive; joining")
983
self.checker.join()
984
self.checker = None
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
985
676
# Start a new checker if needed
986
677
if self.checker is None:
987
# Escape attributes for the shell
988
escaped_attrs = {
989
attr: re.escape(str(getattr(self, attr)))
990
for attr in self.runtime_expansions }
991
678
try:
992
command = self.checker_command % escaped_attrs
993
except TypeError as error:
994
logger.error('Could not format string "%s"',
995
self.checker_command,
996
exc_info=error)
997
return True # Try again later
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
681
except TypeError:
682
# Escape attributes for the shell
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
691
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
696
return True # Try again later
998
697
self.current_checker_command = command
999
logger.info("Starting checker %r for %s", command,
1000
self.name)
1001
# We don't need to redirect stdout and stderr, since
1002
# in normal mode, that is already done by daemon(),
1003
# and in debug mode we don't want to. (Stdin is
1004
# always replaced by /dev/null.)
1005
# The exception is when not debugging but nevertheless
1006
# running in the foreground; use the previously
1007
# created wnull.
1008
popen_args = { "close_fds": True,
1009
"shell": True,
1010
"cwd": "/" }
1011
if (not self.server_settings["debug"]
1012
and self.server_settings["foreground"]):
1013
popen_args.update({"stdout": wnull,
1014
"stderr": wnull })
1015
pipe = multiprocessing.Pipe(duplex = False)
1016
self.checker = multiprocessing.Process(
1017
target = call_pipe,
1018
args = (pipe[1], subprocess.call, command),
1019
kwargs = popen_args)
1020
self.checker.start()
1021
self.checker_callback_tag = gobject.io_add_watch(
1022
pipe[0].fileno(), gobject.IO_IN,
1023
self.checker_callback, pipe[0], command)
698
try:
699
logger.info("Starting checker %r for %s",
700
command, self.name)
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
self.checker = subprocess.Popen(command,
706
close_fds=True,
707
shell=True, cwd="/")
708
self.checker_callback_tag = (gobject.child_watch_add
709
(self.checker.pid,
710
self.checker_callback,
711
data=command))
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
720
error)
1024
721
# Re-run this periodically if run by gobject.timeout_add
1025
722
return True
1026
723
1032
729
if getattr(self, "checker", None) is None:
1033
730
return
1034
731
logger.debug("Stopping checker for %(name)s", vars(self))
1035
self.checker.terminate()
732
try:
733
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
735
#if self.checker.poll() is None:
736
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
738
if error.errno != errno.ESRCH: # No such process
739
raise
1036
740
self.checker = None
1037
741
1038
742
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
1043
745
"""Decorators for marking methods of a DBusObjectWithProperties to
1044
746
become properties on the D-Bus.
1045
747
1054
756
# "Set" method, so we fail early here:
1055
757
if byte_arrays and signature != "ay":
1056
758
raise ValueError("Byte arrays not supported for non-'ay'"
1057
" signature {!r}".format(signature))
1058
759
" signature %r" % signature)
1059
760
def decorator(func):
1060
761
func._dbus_is_property = True
1061
762
func._dbus_interface = dbus_interface
1066
767
func._dbus_name = func._dbus_name[:-14]
1067
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1068
769
return func
1069
1070
return decorator
1071
1072
1073
def dbus_interface_annotations(dbus_interface):
1074
"""Decorator for marking functions returning interface annotations
1075
1076
Usage:
1077
1078
@dbus_interface_annotations("org.example.Interface")
1079
def _foo(self): # Function name does not matter
1080
return {"org.freedesktop.DBus.Deprecated": "true",
1081
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1082
"false"}
1083
"""
1084
1085
def decorator(func):
1086
func._dbus_is_interface = True
1087
func._dbus_interface = dbus_interface
1088
func._dbus_name = dbus_interface
1089
return func
1090
1091
return decorator
1092
1093
1094
def dbus_annotations(annotations):
1095
"""Decorator to annotate D-Bus methods, signals or properties
1096
Usage:
1097
1098
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1099
"org.freedesktop.DBus.Property."
1100
"EmitsChangedSignal": "false"})
1101
@dbus_service_property("org.example.Interface", signature="b",
1102
access="r")
1103
def Property_dbus_property(self):
1104
return dbus.Boolean(False)
1105
1106
See also the DBusObjectWithAnnotations class.
1107
"""
1108
1109
def decorator(func):
1110
func._dbus_annotations = annotations
1111
return func
1112
1113
770
return decorator
1114
771
1115
772
1116
773
class DBusPropertyException(dbus.exceptions.DBusException):
1117
774
"""A base class for D-Bus property-related exceptions
1118
775
"""
1119
pass
776
def __unicode__(self):
777
return unicode(str(self))
1120
778
1121
779
1122
780
class DBusPropertyAccessException(DBusPropertyException):
1131
789
pass
1132
790
1133
791
1134
class DBusObjectWithAnnotations(dbus.service.Object):
1135
"""A D-Bus object with annotations.
1136
1137
Classes inheriting from this can use the dbus_annotations
1138
decorator to add annotations to methods or signals.
1139
"""
1140
1141
@staticmethod
1142
def _is_dbus_thing(thing):
1143
"""Returns a function testing if an attribute is a D-Bus thing
1144
1145
If called like _is_dbus_thing("method") it returns a function
1146
suitable for use as predicate to inspect.getmembers().
1147
"""
1148
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1149
False)
1150
1151
def _get_all_dbus_things(self, thing):
1152
"""Returns a generator of (name, attribute) pairs
1153
"""
1154
return ((getattr(athing.__get__(self), "_dbus_name", name),
1155
athing.__get__(self))
1156
for cls in self.__class__.__mro__
1157
for name, athing in
1158
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1159
1160
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1161
out_signature = "s",
1162
path_keyword = 'object_path',
1163
connection_keyword = 'connection')
1164
def Introspect(self, object_path, connection):
1165
"""Overloading of standard D-Bus method.
1166
1167
Inserts annotation tags on methods and signals.
1168
"""
1169
xmlstring = dbus.service.Object.Introspect(self, object_path,
1170
connection)
1171
try:
1172
document = xml.dom.minidom.parseString(xmlstring)
1173
1174
for if_tag in document.getElementsByTagName("interface"):
1175
# Add annotation tags
1176
for typ in ("method", "signal"):
1177
for tag in if_tag.getElementsByTagName(typ):
1178
annots = dict()
1179
for name, prop in (self.
1180
_get_all_dbus_things(typ)):
1181
if (name == tag.getAttribute("name")
1182
and prop._dbus_interface
1183
== if_tag.getAttribute("name")):
1184
annots.update(getattr(
1185
prop, "_dbus_annotations", {}))
1186
for name, value in annots.items():
1187
ann_tag = document.createElement(
1188
"annotation")
1189
ann_tag.setAttribute("name", name)
1190
ann_tag.setAttribute("value", value)
1191
tag.appendChild(ann_tag)
1192
# Add interface annotation tags
1193
for annotation, value in dict(
1194
itertools.chain.from_iterable(
1195
annotations().items()
1196
for name, annotations
1197
in self._get_all_dbus_things("interface")
1198
if name == if_tag.getAttribute("name")
1199
)).items():
1200
ann_tag = document.createElement("annotation")
1201
ann_tag.setAttribute("name", annotation)
1202
ann_tag.setAttribute("value", value)
1203
if_tag.appendChild(ann_tag)
1204
# Fix argument name for the Introspect method itself
1205
if (if_tag.getAttribute("name")
1206
== dbus.INTROSPECTABLE_IFACE):
1207
for cn in if_tag.getElementsByTagName("method"):
1208
if cn.getAttribute("name") == "Introspect":
1209
for arg in cn.getElementsByTagName("arg"):
1210
if (arg.getAttribute("direction")
1211
== "out"):
1212
arg.setAttribute("name",
1213
"xml_data")
1214
xmlstring = document.toxml("utf-8")
1215
document.unlink()
1216
except (AttributeError, xml.dom.DOMException,
1217
xml.parsers.expat.ExpatError) as error:
1218
logger.error("Failed to override Introspection method",
1219
exc_info=error)
1220
return xmlstring
1221
1222
1223
class DBusObjectWithProperties(DBusObjectWithAnnotations):
792
class DBusObjectWithProperties(dbus.service.Object):
1224
793
"""A D-Bus object with properties.
1225
794
1226
795
Classes inheriting from this can use the dbus_service_property
1228
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
1229
798
"""
1230
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
1231
812
def _get_dbus_property(self, interface_name, property_name):
1232
813
"""Returns a bound method if one exists which is a D-Bus
1233
814
property with the specified name and interface.
1234
815
"""
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
1238
819
if (value._dbus_name == property_name
1239
820
and value._dbus_interface == interface_name):
1240
821
return value.__get__(self)
1241
822
1242
823
# No such property
1243
raise DBusPropertyNotFound("{}:{}.{}".format(
1244
self.dbus_object_path, interface_name, property_name))
1245
1246
@classmethod
1247
def _get_all_interface_names(cls):
1248
"""Get a sequence of all interfaces supported by an object"""
1249
return (name for name in set(getattr(getattr(x, attr),
1250
"_dbus_interface", None)
1251
for x in (inspect.getmro(cls))
1252
for attr in dir(x))
1253
if name is not None)
1254
1255
@dbus.service.method(dbus.PROPERTIES_IFACE,
1256
in_signature="ss",
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1257
829
out_signature="v")
1258
830
def Get(self, interface_name, property_name):
1259
831
"""Standard D-Bus property Get() method, see D-Bus standard.
1277
849
# The byte_arrays option is not supported yet on
1278
850
# signatures other than "ay".
1279
851
if prop._dbus_signature != "ay":
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
852
raise ValueError
1283
853
value = dbus.ByteArray(b''.join(chr(byte)
1284
854
for byte in value))
1285
855
prop(value)
1286
856
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1288
in_signature="s",
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1289
858
out_signature="a{sv}")
1290
859
def GetAll(self, interface_name):
1291
860
"""Standard D-Bus property GetAll() method, see D-Bus
1294
863
Note: Will not include properties with access="write".
1295
864
"""
1296
865
properties = {}
1297
for name, prop in self._get_all_dbus_things("property"):
866
for name, prop in self._get_all_dbus_properties():
1298
867
if (interface_name
1299
868
and interface_name != prop._dbus_interface):
1300
869
# Interface non-empty but did not match
1306
875
if not hasattr(value, "variant_level"):
1307
876
properties[name] = value
1308
877
continue
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
1311
880
return dbus.Dictionary(properties, signature="sv")
1312
881
1313
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1314
def PropertiesChanged(self, interface_name, changed_properties,
1315
invalidated_properties):
1316
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1317
standard.
1318
"""
1319
pass
1320
1321
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1322
883
out_signature="s",
1323
884
path_keyword='object_path',
1324
885
connection_keyword='connection')
1325
886
def Introspect(self, object_path, connection):
1326
"""Overloading of standard D-Bus method.
1327
1328
Inserts property tags and interface annotation tags.
887
"""Standard D-Bus method, overloaded to insert property tags.
1329
888
"""
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1331
object_path,
1332
connection)
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
1333
891
try:
1334
892
document = xml.dom.minidom.parseString(xmlstring)
1335
1336
893
def make_tag(document, name, prop):
1337
894
e = document.createElement("property")
1338
895
e.setAttribute("name", name)
1339
896
e.setAttribute("type", prop._dbus_signature)
1340
897
e.setAttribute("access", prop._dbus_access)
1341
898
return e
1342
1343
899
for if_tag in document.getElementsByTagName("interface"):
1344
# Add property tags
1345
900
for tag in (make_tag(document, name, prop)
1346
901
for name, prop
1347
in self._get_all_dbus_things("property")
902
in self._get_all_dbus_properties()
1348
903
if prop._dbus_interface
1349
904
== if_tag.getAttribute("name")):
1350
905
if_tag.appendChild(tag)
1351
# Add annotation tags for properties
1352
for tag in if_tag.getElementsByTagName("property"):
1353
annots = dict()
1354
for name, prop in self._get_all_dbus_things(
1355
"property"):
1356
if (name == tag.getAttribute("name")
1357
and prop._dbus_interface
1358
== if_tag.getAttribute("name")):
1359
annots.update(getattr(
1360
prop, "_dbus_annotations", {}))
1361
for name, value in annots.items():
1362
ann_tag = document.createElement(
1363
"annotation")
1364
ann_tag.setAttribute("name", name)
1365
ann_tag.setAttribute("value", value)
1366
tag.appendChild(ann_tag)
1367
906
# Add the names to the return values for the
1368
907
# "org.freedesktop.DBus.Properties" methods
1369
908
if (if_tag.getAttribute("name")
1384
923
except (AttributeError, xml.dom.DOMException,
1385
924
xml.parsers.expat.ExpatError) as error:
1386
925
logger.error("Failed to override Introspection method",
1387
exc_info=error)
1388
return xmlstring
1389
1390
try:
1391
dbus.OBJECT_MANAGER_IFACE
1392
except AttributeError:
1393
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1394
1395
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
"""A D-Bus object with an ObjectManager.
1397
1398
Classes inheriting from this exposes the standard
1399
GetManagedObjects call and the InterfacesAdded and
1400
InterfacesRemoved signals on the standard
1401
"org.freedesktop.DBus.ObjectManager" interface.
1402
1403
Note: No signals are sent automatically; they must be sent
1404
manually.
1405
"""
1406
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1408
def GetManagedObjects(self):
1409
"""This function must be overridden"""
1410
raise NotImplementedError()
1411
1412
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1414
def InterfacesAdded(self, object_path, interfaces_and_properties):
1415
pass
1416
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1418
def InterfacesRemoved(self, object_path, interfaces):
1419
pass
1420
1421
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1425
def Introspect(self, object_path, connection):
1426
"""Overloading of standard D-Bus method.
1427
1428
Override return argument name of GetManagedObjects to be
1429
"objpath_interfaces_and_properties"
1430
"""
1431
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1432
object_path,
1433
connection)
1434
try:
1435
document = xml.dom.minidom.parseString(xmlstring)
1436
1437
for if_tag in document.getElementsByTagName("interface"):
1438
# Fix argument name for the GetManagedObjects method
1439
if (if_tag.getAttribute("name")
1440
== dbus.OBJECT_MANAGER_IFACE):
1441
for cn in if_tag.getElementsByTagName("method"):
1442
if (cn.getAttribute("name")
1443
== "GetManagedObjects"):
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1446
== "out"):
1447
arg.setAttribute(
1448
"name",
1449
"objpath_interfaces"
1450
"_and_properties")
1451
xmlstring = document.toxml("utf-8")
1452
document.unlink()
1453
except (AttributeError, xml.dom.DOMException,
1454
xml.parsers.expat.ExpatError) as error:
1455
logger.error("Failed to override Introspection method",
1456
exc_info = error)
1457
return xmlstring
1458
1459
def datetime_to_dbus(dt, variant_level=0):
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
1460
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1461
932
if dt is None:
1462
933
return dbus.String("", variant_level = variant_level)
1463
return dbus.String(dt.isoformat(), variant_level=variant_level)
1464
1465
1466
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1467
"""A class decorator; applied to a subclass of
1468
dbus.service.Object, it will add alternate D-Bus attributes with
1469
interface names according to the "alt_interface_names" mapping.
1470
Usage:
1471
1472
@alternate_dbus_interfaces({"org.example.Interface":
1473
"net.example.AlternateInterface"})
1474
class SampleDBusObject(dbus.service.Object):
1475
@dbus.service.method("org.example.Interface")
1476
def SampleDBusMethod():
1477
pass
1478
1479
The above "SampleDBusMethod" on "SampleDBusObject" will be
1480
reachable via two interfaces: "org.example.Interface" and
1481
"net.example.AlternateInterface", the latter of which will have
1482
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1483
"true", unless "deprecate" is passed with a False value.
1484
1485
This works for methods and signals, and also for D-Bus properties
1486
(from DBusObjectWithProperties) and interfaces (from the
1487
dbus_interface_annotations decorator).
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
1488
942
"""
1489
1490
def wrapper(cls):
1491
for orig_interface_name, alt_interface_name in (
1492
alt_interface_names.items()):
1493
attr = {}
1494
interface_names = set()
1495
# Go though all attributes of the class
1496
for attrname, attribute in inspect.getmembers(cls):
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
1497
950
# Ignore non-D-Bus attributes, and D-Bus attributes
1498
951
# with the wrong interface name
1499
952
if (not hasattr(attribute, "_dbus_interface")
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1502
955
continue
1503
956
# Create an alternate D-Bus interface name based on
1504
957
# the current name
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1508
961
# Is this a D-Bus signal?
1509
962
if getattr(attribute, "_dbus_is_signal", False):
1510
if sys.version_info.major == 2:
1511
# Extract the original non-method undecorated
1512
# function by black magic
1513
nonmethod_func = (dict(
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
1514
966
zip(attribute.func_code.co_freevars,
1515
attribute.__closure__))
1516
["func"].cell_contents)
1517
else:
1518
nonmethod_func = attribute
967
attribute.__closure__))["func"]
968
.cell_contents)
1519
969
# Create a new, but exactly alike, function
1520
970
# object, and decorate it to be a new D-Bus signal
1521
971
# with the alternate D-Bus interface name
1522
if sys.version_info.major == 2:
1523
new_function = types.FunctionType(
1524
nonmethod_func.func_code,
1525
nonmethod_func.func_globals,
1526
nonmethod_func.func_name,
1527
nonmethod_func.func_defaults,
1528
nonmethod_func.func_closure)
1529
else:
1530
new_function = types.FunctionType(
1531
nonmethod_func.__code__,
1532
nonmethod_func.__globals__,
1533
nonmethod_func.__name__,
1534
nonmethod_func.__defaults__,
1535
nonmethod_func.__closure__)
1536
new_function = (dbus.service.signal(
1537
alt_interface,
1538
attribute._dbus_signature)(new_function))
1539
# Copy annotations, if any
1540
try:
1541
new_function._dbus_annotations = dict(
1542
attribute._dbus_annotations)
1543
except AttributeError:
1544
pass
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
1545
981
# Define a creator of a function to call both the
1546
# original and alternate functions, so both the
1547
# original and alternate signals gets sent when
1548
# the function is called
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
1549
984
def fixscope(func1, func2):
1550
985
"""This function is a scope container to pass
1551
986
func1 and func2 to the "call_both" function
1552
987
outside of its arguments"""
1553
1554
@functools.wraps(func2)
1555
988
def call_both(*args, **kwargs):
1556
989
"""This function will emit two D-Bus
1557
990
signals by calling func1 and func2"""
1558
991
func1(*args, **kwargs)
1559
992
func2(*args, **kwargs)
1560
# Make wrapper function look like a D-Bus signal
1561
for name, attr in inspect.getmembers(func2):
1562
if name.startswith("_dbus_"):
1563
setattr(call_both, name, attr)
1564
1565
993
return call_both
1566
994
# Create the "call_both" function and add it to
1567
995
# the class
1568
attr[attrname] = fixscope(attribute, new_function)
996
attr[attrname] = fixscope(attribute,
997
new_function)
1569
998
# Is this a D-Bus method?
1570
999
elif getattr(attribute, "_dbus_is_method", False):
1571
1000
# Create a new, but exactly alike, function
1572
1001
# object. Decorate it to be a new D-Bus method
1573
1002
# with the alternate D-Bus interface name. Add it
1574
1003
# to the class.
1575
attr[attrname] = (
1576
dbus.service.method(
1577
alt_interface,
1578
attribute._dbus_in_signature,
1579
attribute._dbus_out_signature)
1580
(types.FunctionType(attribute.func_code,
1581
attribute.func_globals,
1582
attribute.func_name,
1583
attribute.func_defaults,
1584
attribute.func_closure)))
1585
# Copy annotations, if any
1586
try:
1587
attr[attrname]._dbus_annotations = dict(
1588
attribute._dbus_annotations)
1589
except AttributeError:
1590
pass
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1591
1014
# Is this a D-Bus property?
1592
1015
elif getattr(attribute, "_dbus_is_property", False):
1593
1016
# Create a new, but exactly alike, function
1594
1017
# object, and decorate it to be a new D-Bus
1595
1018
# property with the alternate D-Bus interface
1596
1019
# name. Add it to the class.
1597
attr[attrname] = (dbus_service_property(
1598
alt_interface, attribute._dbus_signature,
1599
attribute._dbus_access,
1600
attribute._dbus_get_args_options
1601
["byte_arrays"])
1602
(types.FunctionType(
1603
attribute.func_code,
1604
attribute.func_globals,
1605
attribute.func_name,
1606
attribute.func_defaults,
1607
attribute.func_closure)))
1608
# Copy annotations, if any
1609
try:
1610
attr[attrname]._dbus_annotations = dict(
1611
attribute._dbus_annotations)
1612
except AttributeError:
1613
pass
1614
# Is this a D-Bus interface?
1615
elif getattr(attribute, "_dbus_is_interface", False):
1616
# Create a new, but exactly alike, function
1617
# object. Decorate it to be a new D-Bus interface
1618
# with the alternate D-Bus interface name. Add it
1619
# to the class.
1620
attr[attrname] = (
1621
dbus_interface_annotations(alt_interface)
1622
(types.FunctionType(attribute.func_code,
1623
attribute.func_globals,
1624
attribute.func_name,
1625
attribute.func_defaults,
1626
attribute.func_closure)))
1627
if deprecate:
1628
# Deprecate all alternate interfaces
1629
iname="_AlternateDBusNames_interface_annotation{}"
1630
for interface_name in interface_names:
1631
1632
@dbus_interface_annotations(interface_name)
1633
def func(self):
1634
return { "org.freedesktop.DBus.Deprecated":
1635
"true" }
1636
# Find an unused name
1637
for aname in (iname.format(i)
1638
for i in itertools.count()):
1639
if aname not in attr:
1640
attr[aname] = func
1641
break
1642
if interface_names:
1643
# Replace the class with a new subclass of it with
1644
# methods, signals, etc. as created above.
1645
cls = type(b"{}Alternate".format(cls.__name__),
1646
(cls, ), attr)
1647
return cls
1648
1649
return wrapper
1650
1651
1652
@alternate_dbus_interfaces({"se.recompile.Mandos":
1653
"se.bsnet.fukt.Mandos"})
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1654
1036
class ClientDBus(Client, DBusObjectWithProperties):
1655
1037
"""A Client class using D-Bus
1656
1038
1660
1042
"""
1661
1043
1662
1044
runtime_expansions = (Client.runtime_expansions
1663
+ ("dbus_object_path", ))
1664
1665
_interface = "se.recompile.Mandos.Client"
1045
+ ("dbus_object_path",))
1666
1046
1667
1047
# dbus.service.Object doesn't use super(), so we can't either.
1668
1048
1669
1049
def __init__(self, bus = None, *args, **kwargs):
1670
1050
self.bus = bus
1671
1051
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1672
1055
# Only now, when this client is initialized, can it show up on
1673
1056
# the D-Bus
1674
client_object_name = str(self.name).translate(
1057
client_object_name = unicode(self.name).translate(
1675
1058
{ord("."): ord("_"),
1676
1059
ord("-"): ord("_")})
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1679
1062
DBusObjectWithProperties.__init__(self, self.bus,
1680
1063
self.dbus_object_path)
1681
1682
def notifychangeproperty(transform_func, dbus_name,
1683
type_func=lambda x: x,
1684
variant_level=1,
1685
invalidate_only=False,
1686
_interface=_interface):
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1687
1068
""" Modify a variable so that it's a property which announces
1688
1069
its changes to DBus.
1689
1070
1694
1075
to the D-Bus. Default: no transform
1695
1076
variant_level: D-Bus variant level. Default: 1
1696
1077
"""
1697
attrname = "_{}".format(dbus_name)
1698
1078
attrname = "_{0}".format(dbus_name)
1699
1079
def setter(self, value):
1700
1080
if hasattr(self, "dbus_object_path"):
1701
1081
if (not hasattr(self, attrname) or
1702
1082
type_func(getattr(self, attrname, None))
1703
1083
!= type_func(value)):
1704
if invalidate_only:
1705
self.PropertiesChanged(
1706
_interface, dbus.Dictionary(),
1707
dbus.Array((dbus_name, )))
1708
else:
1709
dbus_value = transform_func(
1710
type_func(value),
1711
variant_level = variant_level)
1712
self.PropertyChanged(dbus.String(dbus_name),
1713
dbus_value)
1714
self.PropertiesChanged(
1715
_interface,
1716
dbus.Dictionary({ dbus.String(dbus_name):
1717
dbus_value }),
1718
dbus.Array())
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1719
1089
setattr(self, attrname, value)
1720
1090
1721
1091
return property(lambda self: getattr(self, attrname), setter)
1722
1092
1093
1723
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1724
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1725
1096
"ApprovalPending",
1727
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1728
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1729
1100
"LastEnabled")
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1733
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1734
1105
"LastCheckedOK")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1737
1106
last_approval_request = notifychangeproperty(
1738
1107
datetime_to_dbus, "LastApprovalRequest")
1739
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1740
1109
"ApprovedByDefault")
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1744
1114
approval_duration = notifychangeproperty(
1745
1115
dbus.UInt64, "ApprovalDuration",
1746
type_func = lambda td: td.total_seconds() * 1000)
1116
type_func = timedelta_to_milliseconds)
1747
1117
host = notifychangeproperty(dbus.String, "Host")
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1751
1121
extended_timeout = notifychangeproperty(
1752
1122
dbus.UInt64, "ExtendedTimeout",
1753
type_func = lambda td: td.total_seconds() * 1000)
1754
interval = notifychangeproperty(
1755
dbus.UInt64, "Interval",
1756
type_func = lambda td: td.total_seconds() * 1000)
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1757
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
1760
1129
1761
1130
del notifychangeproperty
1762
1131
1769
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1770
1139
Client.__del__(self, *args, **kwargs)
1771
1140
1772
def checker_callback(self, source, condition,
1773
connection, command, *args, **kwargs):
1774
ret = Client.checker_callback(self, source, condition,
1775
connection, command, *args,
1776
**kwargs)
1777
exitstatus = self.last_checker_status
1778
if exitstatus >= 0:
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1779
1147
# Emit D-Bus signal
1780
1148
self.CheckerCompleted(dbus.Int16(exitstatus),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
1149
dbus.Int64(condition),
1783
1150
dbus.String(command))
1784
1151
else:
1785
1152
# Emit D-Bus signal
1786
1153
self.CheckerCompleted(dbus.Int16(-1),
1787
dbus.Int64(
1788
# This is specific to GNU libC
1789
(exitstatus << 8)
1790
| self.last_checker_signal),
1154
dbus.Int64(condition),
1791
1155
dbus.String(command))
1792
return ret
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1793
1159
1794
1160
def start_checker(self, *args, **kwargs):
1795
old_checker_pid = getattr(self.checker, "pid", None)
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1796
1166
r = Client.start_checker(self, *args, **kwargs)
1797
1167
# Only if new checker process was started
1798
1168
if (self.checker is not None
1806
1176
return False
1807
1177
1808
1178
def approve(self, value=True):
1179
self.send_changedstate()
1809
1180
self.approved = value
1810
gobject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
1812
self.send_changedstate()
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1813
1185
1814
1186
## D-Bus methods, signals & properties
1815
1816
## Interfaces
1187
_interface = "se.recompile.Mandos.Client"
1817
1188
1818
1189
## Signals
1819
1190
1830
1201
pass
1831
1202
1832
1203
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1834
1204
@dbus.service.signal(_interface, signature="sv")
1835
1205
def PropertyChanged(self, property, value):
1836
1206
"D-Bus signal"
1857
1227
"D-Bus signal"
1858
1228
return self.need_approval()
1859
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1860
1238
## Methods
1861
1239
1862
1240
# Approve - method
1870
1248
self.checked_ok()
1871
1249
1872
1250
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1874
1251
@dbus.service.method(_interface)
1875
1252
def Enable(self):
1876
1253
"D-Bus method"
1877
1254
self.enable()
1878
1255
1879
1256
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1881
1257
@dbus.service.method(_interface)
1882
1258
def StartChecker(self):
1883
1259
"D-Bus method"
1884
1260
self.start_checker()
1885
1261
1886
1262
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1888
1263
@dbus.service.method(_interface)
1889
1264
def Disable(self):
1890
1265
"D-Bus method"
1891
1266
self.disable()
1892
1267
1893
1268
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1895
1269
@dbus.service.method(_interface)
1896
1270
def StopChecker(self):
1897
1271
self.stop_checker()
1904
1278
return dbus.Boolean(bool(self.approvals_pending))
1905
1279
1906
1280
# ApprovedByDefault - property
1907
@dbus_service_property(_interface,
1908
signature="b",
1281
@dbus_service_property(_interface, signature="b",
1909
1282
access="readwrite")
1910
1283
def ApprovedByDefault_dbus_property(self, value=None):
1911
1284
if value is None: # get
1913
1286
self.approved_by_default = bool(value)
1914
1287
1915
1288
# ApprovalDelay - property
1916
@dbus_service_property(_interface,
1917
signature="t",
1289
@dbus_service_property(_interface, signature="t",
1918
1290
access="readwrite")
1919
1291
def ApprovalDelay_dbus_property(self, value=None):
1920
1292
if value is None: # get
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1922
* 1000)
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1923
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1924
1295
1925
1296
# ApprovalDuration - property
1926
@dbus_service_property(_interface,
1927
signature="t",
1297
@dbus_service_property(_interface, signature="t",
1928
1298
access="readwrite")
1929
1299
def ApprovalDuration_dbus_property(self, value=None):
1930
1300
if value is None: # get
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1932
* 1000)
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1933
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1934
1304
1935
1305
# Name - property
1936
@dbus_annotations(
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1938
1306
@dbus_service_property(_interface, signature="s", access="read")
1939
1307
def Name_dbus_property(self):
1940
1308
return dbus.String(self.name)
1941
1309
1942
1310
# Fingerprint - property
1943
@dbus_annotations(
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1945
1311
@dbus_service_property(_interface, signature="s", access="read")
1946
1312
def Fingerprint_dbus_property(self):
1947
1313
return dbus.String(self.fingerprint)
1948
1314
1949
1315
# Host - property
1950
@dbus_service_property(_interface,
1951
signature="s",
1316
@dbus_service_property(_interface, signature="s",
1952
1317
access="readwrite")
1953
1318
def Host_dbus_property(self, value=None):
1954
1319
if value is None: # get
1955
1320
return dbus.String(self.host)
1956
self.host = str(value)
1321
self.host = unicode(value)
1957
1322
1958
1323
# Created - property
1959
@dbus_annotations(
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1961
1324
@dbus_service_property(_interface, signature="s", access="read")
1962
1325
def Created_dbus_property(self):
1963
1326
return datetime_to_dbus(self.created)
1968
1331
return datetime_to_dbus(self.last_enabled)
1969
1332
1970
1333
# Enabled - property
1971
@dbus_service_property(_interface,
1972
signature="b",
1334
@dbus_service_property(_interface, signature="b",
1973
1335
access="readwrite")
1974
1336
def Enabled_dbus_property(self, value=None):
1975
1337
if value is None: # get
1980
1342
self.disable()
1981
1343
1982
1344
# LastCheckedOK - property
1983
@dbus_service_property(_interface,
1984
signature="s",
1345
@dbus_service_property(_interface, signature="s",
1985
1346
access="readwrite")
1986
1347
def LastCheckedOK_dbus_property(self, value=None):
1987
1348
if value is not None:
1989
1350
return
1990
1351
return datetime_to_dbus(self.last_checked_ok)
1991
1352
1992
# LastCheckerStatus - property
1993
@dbus_service_property(_interface, signature="n", access="read")
1994
def LastCheckerStatus_dbus_property(self):
1995
return dbus.Int16(self.last_checker_status)
1996
1997
1353
# Expires - property
1998
1354
@dbus_service_property(_interface, signature="s", access="read")
1999
1355
def Expires_dbus_property(self):
2005
1361
return datetime_to_dbus(self.last_approval_request)
2006
1362
2007
1363
# Timeout - property
2008
@dbus_service_property(_interface,
2009
signature="t",
1364
@dbus_service_property(_interface, signature="t",
2010
1365
access="readwrite")
2011
1366
def Timeout_dbus_property(self, value=None):
2012
1367
if value is None: # get
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
1368
return dbus.UInt64(self.timeout_milliseconds())
2015
1369
self.timeout = datetime.timedelta(0, 0, 0, value)
2016
# Reschedule disabling
1370
# Reschedule timeout
2017
1371
if self.enabled:
2018
1372
now = datetime.datetime.utcnow()
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
2021
1376
# The timeout has passed
2022
1377
self.disable()
2023
1378
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
2024
1382
if (getattr(self, "disable_initiator_tag", None)
2025
1383
is None):
2026
1384
return
2027
1385
gobject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = gobject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2030
self.disable)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
2031
1389
2032
1390
# ExtendedTimeout - property
2033
@dbus_service_property(_interface,
2034
signature="t",
1391
@dbus_service_property(_interface, signature="t",
2035
1392
access="readwrite")
2036
1393
def ExtendedTimeout_dbus_property(self, value=None):
2037
1394
if value is None: # get
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2039
* 1000)
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
2040
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2041
1397
2042
1398
# Interval - property
2043
@dbus_service_property(_interface,
2044
signature="t",
1399
@dbus_service_property(_interface, signature="t",
2045
1400
access="readwrite")
2046
1401
def Interval_dbus_property(self, value=None):
2047
1402
if value is None: # get
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1403
return dbus.UInt64(self.interval_milliseconds())
2049
1404
self.interval = datetime.timedelta(0, 0, 0, value)
2050
1405
if getattr(self, "checker_initiator_tag", None) is None:
2051
1406
return
2052
1407
if self.enabled:
2053
1408
# Reschedule checker run
2054
1409
gobject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = gobject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
2058
1413
2059
1414
# Checker - property
2060
@dbus_service_property(_interface,
2061
signature="s",
1415
@dbus_service_property(_interface, signature="s",
2062
1416
access="readwrite")
2063
1417
def Checker_dbus_property(self, value=None):
2064
1418
if value is None: # get
2065
1419
return dbus.String(self.checker_command)
2066
self.checker_command = str(value)
1420
self.checker_command = unicode(value)
2067
1421
2068
1422
# CheckerRunning - property
2069
@dbus_service_property(_interface,
2070
signature="b",
1423
@dbus_service_property(_interface, signature="b",
2071
1424
access="readwrite")
2072
1425
def CheckerRunning_dbus_property(self, value=None):
2073
1426
if value is None: # get
2078
1431
self.stop_checker()
2079
1432
2080
1433
# ObjectPath - property
2081
@dbus_annotations(
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
2084
1434
@dbus_service_property(_interface, signature="o", access="read")
2085
1435
def ObjectPath_dbus_property(self):
2086
1436
return self.dbus_object_path # is already a dbus.ObjectPath
2087
1437
2088
1438
# Secret = property
2089
@dbus_annotations(
2090
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2091
"invalidates"})
2092
@dbus_service_property(_interface,
2093
signature="ay",
2094
access="write",
2095
byte_arrays=True)
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
2096
1441
def Secret_dbus_property(self, value):
2097
self.secret = bytes(value)
1442
self.secret = str(value)
2098
1443
2099
1444
del _interface
2100
1445
2104
1449
self._pipe = child_pipe
2105
1450
self._pipe.send(('init', fpr, address))
2106
1451
if not self._pipe.recv():
2107
raise KeyError(fpr)
1452
raise KeyError()
2108
1453
2109
1454
def __getattribute__(self, name):
2110
1455
if name == '_pipe':
2114
1459
if data[0] == 'data':
2115
1460
return data[1]
2116
1461
if data[0] == 'function':
2117
2118
1462
def func(*args, **kwargs):
2119
1463
self._pipe.send(('funcall', name, args, kwargs))
2120
1464
return self._pipe.recv()[1]
2121
2122
1465
return func
2123
1466
2124
1467
def __setattr__(self, name, value):
2127
1470
self._pipe.send(('setattr', name, value))
2128
1471
2129
1472
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
2130
1477
class ClientHandler(socketserver.BaseRequestHandler, object):
2131
1478
"""A class to handle client connections.
2132
1479
2136
1483
def handle(self):
2137
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
2138
1485
logger.info("TCP connection from: %s",
2139
str(self.client_address))
1486
unicode(self.client_address))
2140
1487
logger.debug("Pipe FD: %d",
2141
1488
self.server.child_pipe.fileno())
2142
1489
2143
session = gnutls.ClientSession(self.request)
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1494
1495
# Note: gnutls.connection.X509Credentials is really a
1496
# generic GnuTLS certificate credentials object so long as
1497
# no X.509 keys are added to it. Therefore, we can use it
1498
# here despite using OpenPGP certificates.
2144
1499
2145
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2146
1501
# "+AES-256-CBC", "+SHA1",
2150
1505
priority = self.server.gnutls_priority
2151
1506
if priority is None:
2152
1507
priority = "NORMAL"
2153
gnutls.priority_set_direct(session._c_object, priority,
2154
None)
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
2155
1511
2156
1512
# Start communication using the Mandos protocol
2157
1513
# Get protocol number
2159
1515
logger.debug("Protocol version: %r", line)
2160
1516
try:
2161
1517
if int(line.strip().split()[0]) > 1:
2162
raise RuntimeError(line)
1518
raise RuntimeError
2163
1519
except (ValueError, IndexError, RuntimeError) as error:
2164
1520
logger.error("Unknown protocol version: %s", error)
2165
1521
return
2167
1523
# Start GnuTLS connection
2168
1524
try:
2169
1525
session.handshake()
2170
except gnutls.Error as error:
1526
except gnutls.errors.GNUTLSError as error:
2171
1527
logger.warning("Handshake failed: %s", error)
2172
1528
# Do not run session.bye() here: the session is not
2173
1529
# established. Just abandon the request.
2177
1533
approval_required = False
2178
1534
try:
2179
1535
try:
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
2183
1540
logger.warning("Bad certificate: %s", error)
2184
1541
return
2185
1542
logger.debug("Fingerprint: %s", fpr)
2190
1547
except KeyError:
2191
1548
return
2192
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
2193
1554
if client.approval_delay:
2194
1555
delay = client.approval_delay
2195
1556
client.approvals_pending += 1
2198
1559
while True:
2199
1560
if not client.enabled:
2200
1561
logger.info("Client %s is disabled",
2201
client.name)
1562
client.name)
2202
1563
if self.server.use_dbus:
2203
1564
# Emit D-Bus signal
2204
1565
client.Rejected("Disabled")
2213
1574
if self.server.use_dbus:
2214
1575
# Emit D-Bus signal
2215
1576
client.NeedApproval(
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
2218
1579
else:
2219
1580
logger.warning("Client %s was not approved",
2220
1581
client.name)
2226
1587
#wait until timeout or approved
2227
1588
time = datetime.datetime.now()
2228
1589
client.changedstate.acquire()
2229
client.changedstate.wait(delay.total_seconds())
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
2230
1593
client.changedstate.release()
2231
1594
time2 = datetime.datetime.now()
2232
1595
if (time2 - time) >= delay:
2243
1606
else:
2244
1607
delay -= time2 - time
2245
1608
2246
try:
2247
session.send(client.secret)
2248
except gnutls.Error as error:
2249
logger.warning("gnutls send failed",
2250
exc_info = error)
2251
return
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
2252
1620
2253
1621
logger.info("Sending secret to %s", client.name)
2254
1622
# bump the timeout using extended_timeout
2255
client.bump_timeout(client.extended_timeout)
1623
client.checked_ok(client.extended_timeout)
2256
1624
if self.server.use_dbus:
2257
1625
# Emit D-Bus signal
2258
1626
client.GotSecret()
2262
1630
client.approvals_pending -= 1
2263
1631
try:
2264
1632
session.bye()
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
2267
exc_info=error)
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
2268
1635
2269
1636
@staticmethod
2270
1637
def peer_certificate(session):
2271
1638
"Return the peer's OpenPGP certificate as a bytestring"
2272
1639
# If not an OpenPGP certificate...
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
2276
return b""
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1642
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
# ...do the normal thing
1644
return session.peer_certificate
2277
1645
list_size = ctypes.c_uint(1)
2278
cert_list = (gnutls.certificate_get_peers
1646
cert_list = (gnutls.library.functions
1647
.gnutls_certificate_get_peers
2279
1648
(session._c_object, ctypes.byref(list_size)))
2280
1649
if not bool(cert_list) and list_size.value != 0:
2281
raise gnutls.Error("error getting peer certificate")
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
2282
1652
if list_size.value == 0:
2283
1653
return None
2284
1654
cert = cert_list[0]
2288
1658
def fingerprint(openpgp):
2289
1659
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2290
1660
# New GnuTLS "datum" with the OpenPGP public key
2291
datum = gnutls.datum_t(
2292
ctypes.cast(ctypes.c_char_p(openpgp),
2293
ctypes.POINTER(ctypes.c_ubyte)),
2294
ctypes.c_uint(len(openpgp)))
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
ctypes.c_uint(len(openpgp))))
2295
1666
# New empty GnuTLS certificate
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1667
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2298
1670
# Import the OpenPGP public key into the certificate
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
2301
1675
# Verify the self signature in the key
2302
1676
crtverify = ctypes.c_uint()
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
2305
1680
if crtverify.value != 0:
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
2308
1684
# New buffer for the fingerprint
2309
1685
buf = ctypes.create_string_buffer(20)
2310
1686
buf_len = ctypes.c_size_t()
2311
1687
# Get the fingerprint from the certificate into the buffer
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
2314
1691
# Deinit the certificate
2315
gnutls.openpgp_crt_deinit(crt)
1692
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2316
1693
# Convert the buffer to a Python bytestring
2317
1694
fpr = ctypes.string_at(buf, buf_len.value)
2318
1695
# Convert the bytestring to hexadecimal notation
2322
1699
2323
1700
class MultiprocessingMixIn(object):
2324
1701
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2325
2326
1702
def sub_process_main(self, request, address):
2327
1703
try:
2328
1704
self.finish_request(request, address)
2333
1709
def process_request(self, request, address):
2334
1710
"""Start a new process to process the request."""
2335
1711
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
1712
args = (request,
1713
address))
2337
1714
proc.start()
2338
1715
return proc
2339
1716
2340
1717
2341
1718
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2342
1719
""" adds a pipe to the MixIn """
2343
2344
1720
def process_request(self, request, client_address):
2345
1721
"""Overrides and wraps the original process_request().
2346
1722
2355
1731
2356
1732
def add_pipe(self, parent_pipe, proc):
2357
1733
"""Dummy function; override as necessary"""
2358
raise NotImplementedError()
1734
raise NotImplementedError
2359
1735
2360
1736
2361
1737
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2367
1743
interface: None or a network interface name (string)
2368
1744
use_ipv6: Boolean; to use IPv6 or not
2369
1745
"""
2370
2371
1746
def __init__(self, server_address, RequestHandlerClass,
2372
interface=None,
2373
use_ipv6=True,
2374
socketfd=None):
2375
"""If socketfd is set, use that file descriptor instead of
2376
creating a new one with socket.socket().
2377
"""
1747
interface=None, use_ipv6=True):
2378
1748
self.interface = interface
2379
1749
if use_ipv6:
2380
1750
self.address_family = socket.AF_INET6
2381
if socketfd is not None:
2382
# Save the file descriptor
2383
self.socketfd = socketfd
2384
# Save the original socket.socket() function
2385
self.socket_socket = socket.socket
2386
# To implement --socket, we monkey patch socket.socket.
2387
#
2388
# (When socketserver.TCPServer is a new-style class, we
2389
# could make self.socket into a property instead of monkey
2390
# patching socket.socket.)
2391
#
2392
# Create a one-time-only replacement for socket.socket()
2393
@functools.wraps(socket.socket)
2394
def socket_wrapper(*args, **kwargs):
2395
# Restore original function so subsequent calls are
2396
# not affected.
2397
socket.socket = self.socket_socket
2398
del self.socket_socket
2399
# This time only, return a new socket object from the
2400
# saved file descriptor.
2401
return socket.fromfd(self.socketfd, *args, **kwargs)
2402
# Replace socket.socket() function with wrapper
2403
socket.socket = socket_wrapper
2404
# The socketserver.TCPServer.__init__ will call
2405
# socket.socket(), which might be our replacement,
2406
# socket_wrapper(), if socketfd was set.
2407
1751
socketserver.TCPServer.__init__(self, server_address,
2408
1752
RequestHandlerClass)
2409
2410
1753
def server_bind(self):
2411
1754
"""This overrides the normal server_bind() function
2412
1755
to bind to an interface if one was specified, and also NOT to
2418
1761
self.interface)
2419
1762
else:
2420
1763
try:
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
2424
1768
except socket.error as error:
2425
if error.errno == errno.EPERM:
2426
logger.error("No permission to bind to"
2427
" interface %s", self.interface)
2428
elif error.errno == errno.ENOPROTOOPT:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
elif error[0] == errno.ENOPROTOOPT:
2429
1774
logger.error("SO_BINDTODEVICE not available;"
2430
1775
" cannot bind to interface %s",
2431
1776
self.interface)
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
2435
1777
else:
2436
1778
raise
2437
1779
# Only bind(2) the socket if we really need to.
2440
1782
if self.address_family == socket.AF_INET6:
2441
1783
any_address = "::" # in6addr_any
2442
1784
else:
2443
any_address = "0.0.0.0" # INADDR_ANY
1785
any_address = socket.INADDR_ANY
2444
1786
self.server_address = (any_address,
2445
1787
self.server_address[1])
2446
1788
elif not self.server_address[1]:
2447
self.server_address = (self.server_address[0], 0)
1789
self.server_address = (self.server_address[0],
1790
0)
2448
1791
# if self.interface:
2449
1792
# self.server_address = (self.server_address[0],
2450
1793
# 0, # port
2464
1807
2465
1808
Assumes a gobject.MainLoop event loop.
2466
1809
"""
2467
2468
1810
def __init__(self, server_address, RequestHandlerClass,
2469
interface=None,
2470
use_ipv6=True,
2471
clients=None,
2472
gnutls_priority=None,
2473
use_dbus=True,
2474
socketfd=None):
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
2475
1813
self.enabled = False
2476
1814
self.clients = clients
2477
1815
if self.clients is None:
2481
1819
IPv6_TCPServer.__init__(self, server_address,
2482
1820
RequestHandlerClass,
2483
1821
interface = interface,
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1822
use_ipv6 = use_ipv6)
2487
1823
def server_activate(self):
2488
1824
if self.enabled:
2489
1825
return socketserver.TCPServer.server_activate(self)
2493
1829
2494
1830
def add_pipe(self, parent_pipe, proc):
2495
1831
# Call "handle_ipc" for both data and EOF events
2496
gobject.io_add_watch(
2497
parent_pipe.fileno(),
2498
gobject.IO_IN | gobject.IO_HUP,
2499
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2501
proc = proc))
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
2502
1838
2503
def handle_ipc(self, source, condition,
2504
parent_pipe=None,
2505
proc = None,
2506
client_object=None):
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
2507
1855
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2509
1857
# Wait for other process to exit
2510
1858
proc.join()
2511
1859
return False
2532
1880
parent_pipe.send(False)
2533
1881
return False
2534
1882
2535
gobject.io_add_watch(
2536
parent_pipe.fileno(),
2537
gobject.IO_IN | gobject.IO_HUP,
2538
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2540
proc = proc,
2541
client_object = client))
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
2542
1891
parent_pipe.send(True)
2543
1892
# remove the old hook in favor of the new above hook on
2544
1893
# same fileno
2550
1899
2551
1900
parent_pipe.send(('data', getattr(client_object,
2552
1901
funcname)(*args,
2553
**kwargs)))
1902
**kwargs)))
2554
1903
2555
1904
if command == 'getattr':
2556
1905
attrname = request[1]
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
2560
1908
else:
2561
parent_pipe.send((
2562
'data', client_object.__getattribute__(attrname)))
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
2563
1911
2564
1912
if command == 'setattr':
2565
1913
attrname = request[1]
2569
1917
return True
2570
1918
2571
1919
2572
def rfc3339_duration_to_delta(duration):
2573
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2574
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
2589
"""
2590
2591
# Parsing an RFC 3339 duration with regular expressions is not
2592
# possible - there would have to be multiple places for the same
2593
# values, like seconds. The current code, while more esoteric, is
2594
# cleaner without depending on a parsing library. If Python had a
2595
# built-in library for parsing we would use it, but we'd like to
2596
# avoid excessive use of external libraries.
2597
2598
# New type for defining tokens, syntax, and semantics all-in-one
2599
Token = collections.namedtuple("Token", (
2600
"regexp", # To match token; if "value" is not None, must have
2601
# a "group" containing digits
2602
"value", # datetime.timedelta or None
2603
"followers")) # Tokens valid after this token
2604
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2605
# the "duration" ABNF definition in RFC 3339, Appendix A.
2606
token_end = Token(re.compile(r"$"), None, frozenset())
2607
token_second = Token(re.compile(r"(\d+)S"),
2608
datetime.timedelta(seconds=1),
2609
frozenset((token_end, )))
2610
token_minute = Token(re.compile(r"(\d+)M"),
2611
datetime.timedelta(minutes=1),
2612
frozenset((token_second, token_end)))
2613
token_hour = Token(re.compile(r"(\d+)H"),
2614
datetime.timedelta(hours=1),
2615
frozenset((token_minute, token_end)))
2616
token_time = Token(re.compile(r"T"),
2617
None,
2618
frozenset((token_hour, token_minute,
2619
token_second)))
2620
token_day = Token(re.compile(r"(\d+)D"),
2621
datetime.timedelta(days=1),
2622
frozenset((token_time, token_end)))
2623
token_month = Token(re.compile(r"(\d+)M"),
2624
datetime.timedelta(weeks=4),
2625
frozenset((token_day, token_end)))
2626
token_year = Token(re.compile(r"(\d+)Y"),
2627
datetime.timedelta(weeks=52),
2628
frozenset((token_month, token_end)))
2629
token_week = Token(re.compile(r"(\d+)W"),
2630
datetime.timedelta(weeks=1),
2631
frozenset((token_end, )))
2632
token_duration = Token(re.compile(r"P"), None,
2633
frozenset((token_year, token_month,
2634
token_day, token_time,
2635
token_week)))
2636
# Define starting values
2637
value = datetime.timedelta() # Value so far
2638
found_token = None
2639
followers = frozenset((token_duration, )) # Following valid tokens
2640
s = duration # String left to parse
2641
# Loop until end token is found
2642
while found_token is not token_end:
2643
# Search for any currently valid tokens
2644
for token in followers:
2645
match = token.regexp.match(s)
2646
if match is not None:
2647
# Token found
2648
if token.value is not None:
2649
# Value found, parse digits
2650
factor = int(match.group(1), 10)
2651
# Add to value so far
2652
value += factor * token.value
2653
# Strip token from string
2654
s = token.regexp.sub("", s, 1)
2655
# Go to found token
2656
found_token = token
2657
# Set valid next tokens
2658
followers = found_token.followers
2659
break
2660
else:
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
2663
.format(duration))
2664
# End token found
2665
return value
2666
2667
2668
1920
def string_to_delta(interval):
2669
1921
"""Parse a string and return a datetime.timedelta
2670
1922
2681
1933
>>> string_to_delta('5m 30s')
2682
1934
datetime.timedelta(0, 330)
2683
1935
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
2690
1936
timevalue = datetime.timedelta(0)
2691
1937
for s in interval.split():
2692
1938
try:
2693
suffix = s[-1]
1939
suffix = unicode(s[-1])
2694
1940
value = int(s[:-1])
2695
1941
if suffix == "d":
2696
1942
delta = datetime.timedelta(value)
2703
1949
elif suffix == "w":
2704
1950
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2705
1951
else:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
2708
1954
raise ValueError(*(e.args))
2709
1955
timevalue += delta
2710
1956
return timevalue
2723
1969
sys.exit()
2724
1970
if not noclose:
2725
1971
# Close all standard open file descriptors
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2727
1973
if not stat.S_ISCHR(os.fstat(null).st_mode):
2728
1974
raise OSError(errno.ENODEV,
2729
"{} not a character device"
2730
.format(os.devnull))
1975
"%s not a character device"
1976
% os.path.devnull)
2731
1977
os.dup2(null, sys.stdin.fileno())
2732
1978
os.dup2(null, sys.stdout.fileno())
2733
1979
os.dup2(null, sys.stderr.fileno())
2742
1988
2743
1989
parser = argparse.ArgumentParser()
2744
1990
parser.add_argument("-v", "--version", action="version",
2745
version = "%(prog)s {}".format(version),
1991
version = "%%(prog)s %s" % version,
2746
1992
help="show version number and exit")
2747
1993
parser.add_argument("-i", "--interface", metavar="IF",
2748
1994
help="Bind to interface IF")
2754
2000
help="Run self-test")
2755
2001
parser.add_argument("--debug", action="store_true",
2756
2002
help="Debug mode; run in foreground and log"
2757
" to terminal", default=None)
2003
" to terminal")
2758
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2759
2005
help="Debug level for stdout output")
2760
2006
parser.add_argument("--priority", help="GnuTLS"
2767
2013
" files")
2768
2014
parser.add_argument("--no-dbus", action="store_false",
2769
2015
dest="use_dbus", help="Do not provide D-Bus"
2770
" system bus interface", default=None)
2016
" system bus interface")
2771
2017
parser.add_argument("--no-ipv6", action="store_false",
2772
dest="use_ipv6", help="Do not use IPv6",
2773
default=None)
2018
dest="use_ipv6", help="Do not use IPv6")
2774
2019
parser.add_argument("--no-restore", action="store_false",
2775
2020
dest="restore", help="Do not restore stored"
2776
" state", default=None)
2777
parser.add_argument("--socket", type=int,
2778
help="Specify a file descriptor to a network"
2779
" socket to use instead of creating one")
2021
" state")
2780
2022
parser.add_argument("--statedir", metavar="DIR",
2781
2023
help="Directory to save/restore state in")
2782
parser.add_argument("--foreground", action="store_true",
2783
help="Run in foreground", default=None)
2784
parser.add_argument("--no-zeroconf", action="store_false",
2785
dest="zeroconf", help="Do not use Zeroconf",
2786
default=None)
2787
2024
2788
2025
options = parser.parse_args()
2789
2026
2790
2027
if options.check:
2791
2028
import doctest
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
2029
doctest.testmod()
2030
sys.exit()
2794
2031
2795
2032
# Default values for config file for server-global settings
2796
2033
server_defaults = { "interface": "",
2798
2035
"port": "",
2799
2036
"debug": "False",
2800
2037
"priority":
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2803
2039
"servicename": "Mandos",
2804
2040
"use_dbus": "True",
2805
2041
"use_ipv6": "True",
2806
2042
"debuglevel": "",
2807
2043
"restore": "True",
2808
"socket": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2811
"zeroconf": "True",
2812
}
2044
"statedir": "/var/lib/mandos"
2045
}
2813
2046
2814
2047
# Parse config file for server-global settings
2815
2048
server_config = configparser.SafeConfigParser(server_defaults)
2816
2049
del server_defaults
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
2818
2052
# Convert the SafeConfigParser object to a dict
2819
2053
server_settings = server_config.defaults()
2820
2054
# Use the appropriate methods on the non-string config options
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2822
2056
server_settings[option] = server_config.getboolean("DEFAULT",
2823
2057
option)
2824
2058
if server_settings["port"]:
2825
2059
server_settings["port"] = server_config.getint("DEFAULT",
2826
2060
"port")
2827
if server_settings["socket"]:
2828
server_settings["socket"] = server_config.getint("DEFAULT",
2829
"socket")
2830
# Later, stdin will, and stdout and stderr might, be dup'ed
2831
# over with an opened os.devnull. But we don't want this to
2832
# happen with a supplied network socket.
2833
if 0 <= server_settings["socket"] <= 2:
2834
server_settings["socket"] = os.dup(server_settings
2835
["socket"])
2836
2061
del server_config
2837
2062
2838
2063
# Override the settings from the config file with command line
2839
2064
# options, if set.
2840
2065
for option in ("interface", "address", "port", "debug",
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
2844
2069
value = getattr(options, option)
2845
2070
if value is not None:
2846
2071
server_settings[option] = value
2847
2072
del options
2848
2073
# Force all strings to be unicode
2849
2074
for option in server_settings.keys():
2850
if isinstance(server_settings[option], bytes):
2851
server_settings[option] = (server_settings[option]
2852
.decode("utf-8"))
2853
# Force all boolean options to be boolean
2854
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2855
"foreground", "zeroconf"):
2856
server_settings[option] = bool(server_settings[option])
2857
# Debug implies foreground
2858
if server_settings["debug"]:
2859
server_settings["foreground"] = True
2075
if type(server_settings[option]) is str:
2076
server_settings[option] = unicode(server_settings[option])
2860
2077
# Now we have our good server settings in "server_settings"
2861
2078
2862
2079
##################################################################
2863
2080
2864
if (not server_settings["zeroconf"]
2865
and not (server_settings["port"]
2866
or server_settings["socket"] != "")):
2867
parser.error("Needs port or socket to work without Zeroconf")
2868
2869
2081
# For convenience
2870
2082
debug = server_settings["debug"]
2871
2083
debuglevel = server_settings["debuglevel"]
2873
2085
use_ipv6 = server_settings["use_ipv6"]
2874
2086
stored_state_path = os.path.join(server_settings["statedir"],
2875
2087
stored_state_file)
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2878
2088
2879
2089
if debug:
2880
2090
initlogger(debug, logging.DEBUG)
2886
2096
initlogger(debug, level)
2887
2097
2888
2098
if server_settings["servicename"] != "Mandos":
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
2099
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
2893
2103
2894
2104
# Parse config file with clients
2895
2105
client_config = configparser.SafeConfigParser(Client
2900
2110
global mandos_dbus_service
2901
2111
mandos_dbus_service = None
2902
2112
2903
socketfd = None
2904
if server_settings["socket"] != "":
2905
socketfd = server_settings["socket"]
2906
tcp_server = MandosServer(
2907
(server_settings["address"], server_settings["port"]),
2908
ClientHandler,
2909
interface=(server_settings["interface"] or None),
2910
use_ipv6=use_ipv6,
2911
gnutls_priority=server_settings["priority"],
2912
use_dbus=use_dbus,
2913
socketfd=socketfd)
2914
if not foreground:
2915
pidfilename = "/run/mandos.pid"
2916
if not os.path.isdir("/run/."):
2917
pidfilename = "/var/run/mandos.pid"
2918
pidfile = None
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2919
2124
try:
2920
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2921
except IOError as e:
2922
logger.error("Could not open file %r", pidfilename,
2923
exc_info=e)
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
2924
2128
2925
for name in ("_mandos", "mandos", "nobody"):
2129
try:
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
2132
except KeyError:
2926
2133
try:
2927
uid = pwd.getpwnam(name).pw_uid
2928
gid = pwd.getpwnam(name).pw_gid
2929
break
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
2930
2136
except KeyError:
2931
continue
2932
else:
2933
uid = 65534
2934
gid = 65534
2137
try:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
2140
except KeyError:
2141
uid = 65534
2142
gid = 65534
2935
2143
try:
2936
2144
os.setgid(gid)
2937
2145
os.setuid(uid)
2938
2146
except OSError as error:
2939
if error.errno != errno.EPERM:
2940
raise
2147
if error[0] != errno.EPERM:
2148
raise error
2941
2149
2942
2150
if debug:
2943
2151
# Enable all possible GnuTLS debugging
2944
2152
2945
2153
# "Use a log level over 10 to enable all debugging options."
2946
2154
# - GnuTLS manual
2947
gnutls.global_set_log_level(11)
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
2948
2156
2949
@gnutls.log_func
2157
@gnutls.library.types.gnutls_log_func
2950
2158
def debug_gnutls(level, string):
2951
2159
logger.debug("GnuTLS: %s", string[:-1])
2952
2160
2953
gnutls.global_set_log_function(debug_gnutls)
2161
(gnutls.library.functions
2162
.gnutls_global_set_log_function(debug_gnutls))
2954
2163
2955
2164
# Redirect stdin so all checkers get /dev/null
2956
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2957
2166
os.dup2(null, sys.stdin.fileno())
2958
2167
if null > 2:
2959
2168
os.close(null)
2960
2169
2961
2170
# Need to fork before connecting to D-Bus
2962
if not foreground:
2171
if not debug:
2963
2172
# Close all input and output, do double fork, etc.
2964
2173
daemon()
2965
2174
2966
# multiprocessing will use threads, so before we use gobject we
2967
# need to inform gobject that threads will be used.
2968
2175
gobject.threads_init()
2969
2176
2970
2177
global main_loop
2971
2178
# From the Avahi example code
2972
DBusGMainLoop(set_as_default=True)
2179
DBusGMainLoop(set_as_default=True )
2973
2180
main_loop = gobject.MainLoop()
2974
2181
bus = dbus.SystemBus()
2975
2182
# End of Avahi example code
2976
2183
if use_dbus:
2977
2184
try:
2978
2185
bus_name = dbus.service.BusName("se.recompile.Mandos",
2979
bus,
2980
do_not_queue=True)
2981
old_bus_name = dbus.service.BusName(
2982
"se.bsnet.fukt.Mandos", bus,
2983
do_not_queue=True)
2984
except dbus.exceptions.DBusException as e:
2985
logger.error("Disabling D-Bus:", exc_info=e)
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2986
2192
use_dbus = False
2987
2193
server_settings["use_dbus"] = False
2988
2194
tcp_server.use_dbus = False
2989
if zeroconf:
2990
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2991
service = AvahiServiceToSyslog(
2992
name = server_settings["servicename"],
2993
servicetype = "_mandos._tcp",
2994
protocol = protocol,
2995
bus = bus)
2996
if server_settings["interface"]:
2997
service.interface = if_nametoindex(
2998
server_settings["interface"].encode("utf-8"))
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2999
2203
3000
2204
global multiprocessing_manager
3001
2205
multiprocessing_manager = multiprocessing.Manager()
3002
2206
3003
2207
client_class = Client
3004
2208
if use_dbus:
3005
client_class = functools.partial(ClientDBus, bus = bus)
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
3006
2211
3007
2212
client_settings = Client.config_parser(client_config)
3008
2213
old_client_settings = {}
3009
2214
clients_data = {}
3010
2215
3011
# This is used to redirect stdout and stderr for checker processes
3012
global wnull
3013
wnull = open(os.devnull, "w") # A writable /dev/null
3014
# Only used if server is running in foreground but not in debug
3015
# mode
3016
if debug or not foreground:
3017
wnull.close()
3018
3019
2216
# Get client data and settings from last running state.
3020
2217
if server_settings["restore"]:
3021
2218
try:
3022
2219
with open(stored_state_path, "rb") as stored_state:
3023
clients_data, old_client_settings = pickle.load(
3024
stored_state)
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
3025
2222
os.remove(stored_state_path)
3026
2223
except IOError as e:
3027
if e.errno == errno.ENOENT:
3028
logger.warning("Could not load persistent state:"
3029
" {}".format(os.strerror(e.errno)))
3030
else:
3031
logger.critical("Could not load persistent state:",
3032
exc_info=e)
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
3033
2227
raise
3034
2228
except EOFError as e:
3035
2229
logger.warning("Could not load persistent state: "
3036
"EOFError:",
3037
exc_info=e)
2230
"EOFError: {0}".format(e))
3038
2231
3039
2232
with PGPEngine() as pgp:
3040
for client_name, client in clients_data.items():
3041
# Skip removed clients
3042
if client_name not in client_settings:
3043
continue
3044
2233
for client_name, client in clients_data.iteritems():
3045
2234
# Decide which value to use after restoring saved state.
3046
2235
# We have three different values: Old config file,
3047
2236
# new config file, and saved state.
3052
2241
# For each value in new config, check if it
3053
2242
# differs from the old config value (Except for
3054
2243
# the "secret" attribute)
3055
if (name != "secret"
3056
and (value !=
3057
old_client_settings[client_name][name])):
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
3058
2247
client[name] = value
3059
2248
except KeyError:
3060
2249
pass
3061
2250
3062
2251
# Clients who has passed its expire date can still be
3063
# enabled if its last checker was successful. A Client
3064
# whose checker succeeded before we stored its state is
3065
# assumed to have successfully run all checkers during
3066
# downtime.
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
3067
2255
if client["enabled"]:
3068
2256
if datetime.datetime.utcnow() >= client["expires"]:
3069
2257
if not client["last_checked_ok"]:
3070
2258
logger.warning(
3071
"disabling client {} - Client never "
3072
"performed a successful checker".format(
3073
client_name))
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
3074
2262
client["enabled"] = False
3075
2263
elif client["last_checker_status"] != 0:
3076
2264
logger.warning(
3077
"disabling client {} - Client last"
3078
" checker failed with error code"
3079
" {}".format(
3080
client_name,
3081
client["last_checker_status"]))
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
3082
2269
client["enabled"] = False
3083
2270
else:
3084
client["expires"] = (
3085
datetime.datetime.utcnow()
3086
+ client["timeout"])
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
3087
2274
logger.debug("Last checker succeeded,"
3088
" keeping {} enabled".format(
3089
client_name))
2275
" keeping {0} enabled"
2276
.format(client["name"]))
3090
2277
try:
3091
client["secret"] = pgp.decrypt(
3092
client["encrypted_secret"],
3093
client_settings[client_name]["secret"])
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
3094
2282
except PGPError:
3095
2283
# If decryption fails, we use secret from new settings
3096
logger.debug("Failed to decrypt {} old secret".format(
3097
client_name))
3098
client["secret"] = (client_settings[client_name]
3099
["secret"])
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
3100
2289
3101
2290
# Add/remove clients based on new changes made to config
3102
2291
for client_name in (set(old_client_settings)
3105
2294
for client_name in (set(client_settings)
3106
2295
- set(old_client_settings)):
3107
2296
clients_data[client_name] = client_settings[client_name]
3108
3109
# Create all client objects
3110
for client_name, client in clients_data.items():
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
3111
2300
tcp_server.clients[client_name] = client_class(
3112
name = client_name,
3113
settings = client,
3114
server_settings = server_settings)
2301
name = client_name, settings = client)
3115
2302
3116
2303
if not tcp_server.clients:
3117
2304
logger.warning("No clients defined")
3118
3119
if not foreground:
3120
if pidfile is not None:
3121
pid = os.getpid()
3122
try:
3123
with pidfile:
3124
print(pid, file=pidfile)
3125
except IOError:
3126
logger.error("Could not write to file %r with PID %d",
3127
pidfilename, pid)
3128
del pidfile
2305
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
3129
2318
del pidfilename
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
3130
2320
3131
2321
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3132
2322
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3133
2323
3134
2324
if use_dbus:
3135
3136
@alternate_dbus_interfaces(
3137
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3138
class MandosDBusService(DBusObjectWithObjectManager):
2325
class MandosDBusService(dbus.service.Object):
3139
2326
"""A D-Bus proxy object"""
3140
3141
2327
def __init__(self):
3142
2328
dbus.service.Object.__init__(self, bus, "/")
3143
3144
2329
_interface = "se.recompile.Mandos"
3145
2330
3146
2331
@dbus.service.signal(_interface, signature="o")
3153
2338
"D-Bus signal"
3154
2339
pass
3155
2340
3156
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3157
"true"})
3158
2341
@dbus.service.signal(_interface, signature="os")
3159
2342
def ClientRemoved(self, objpath, name):
3160
2343
"D-Bus signal"
3161
2344
pass
3162
2345
3163
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3164
"true"})
3165
2346
@dbus.service.method(_interface, out_signature="ao")
3166
2347
def GetAllClients(self):
3167
2348
"D-Bus method"
3168
return dbus.Array(c.dbus_object_path for c in
2349
return dbus.Array(c.dbus_object_path
2350
for c in
3169
2351
tcp_server.clients.itervalues())
3170
2352
3171
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3172
"true"})
3173
2353
@dbus.service.method(_interface,
3174
2354
out_signature="a{oa{sv}}")
3175
2355
def GetAllClientsWithProperties(self):
3176
2356
"D-Bus method"
3177
2357
return dbus.Dictionary(
3178
{ c.dbus_object_path: c.GetAll(
3179
"se.recompile.Mandos.Client")
3180
for c in tcp_server.clients.itervalues() },
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
3181
2360
signature="oa{sv}")
3182
2361
3183
2362
@dbus.service.method(_interface, in_signature="o")
3187
2366
if c.dbus_object_path == object_path:
3188
2367
del tcp_server.clients[c.name]
3189
2368
c.remove_from_connection()
3190
# Don't signal the disabling
2369
# Don't signal anything except ClientRemoved
3191
2370
c.disable(quiet=True)
3192
# Emit D-Bus signal for removal
3193
self.client_removed_signal(c)
2371
# Emit D-Bus signal
2372
self.ClientRemoved(object_path, c.name)
3194
2373
return
3195
2374
raise KeyError(object_path)
3196
2375
3197
2376
del _interface
3198
3199
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3200
out_signature = "a{oa{sa{sv}}}")
3201
def GetManagedObjects(self):
3202
"""D-Bus method"""
3203
return dbus.Dictionary(
3204
{ client.dbus_object_path:
3205
dbus.Dictionary(
3206
{ interface: client.GetAll(interface)
3207
for interface in
3208
client._get_all_interface_names()})
3209
for client in tcp_server.clients.values()})
3210
3211
def client_added_signal(self, client):
3212
"""Send the new standard signal and the old signal"""
3213
if use_dbus:
3214
# New standard signal
3215
self.InterfacesAdded(
3216
client.dbus_object_path,
3217
dbus.Dictionary(
3218
{ interface: client.GetAll(interface)
3219
for interface in
3220
client._get_all_interface_names()}))
3221
# Old signal
3222
self.ClientAdded(client.dbus_object_path)
3223
3224
def client_removed_signal(self, client):
3225
"""Send the new standard signal and the old signal"""
3226
if use_dbus:
3227
# New standard signal
3228
self.InterfacesRemoved(
3229
client.dbus_object_path,
3230
client._get_all_interface_names())
3231
# Old signal
3232
self.ClientRemoved(client.dbus_object_path,
3233
client.name)
3234
2377
3235
mandos_dbus_service = MandosDBusService()
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
3236
2381
3237
2382
def cleanup():
3238
2383
"Cleanup function; run on exit"
3239
if zeroconf:
3240
service.cleanup()
2384
service.cleanup()
3241
2385
3242
2386
multiprocessing.active_children()
3243
wnull.close()
3244
2387
if not (tcp_server.clients or client_settings):
3245
2388
return
3246
2389
3257
2400
3258
2401
# A list of attributes that can not be pickled
3259
2402
# + secret.
3260
exclude = { "bus", "changedstate", "secret",
3261
"checker", "server_settings" }
3262
for name, typ in inspect.getmembers(dbus.service
3263
.Object):
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
3264
2407
exclude.add(name)
3265
2408
3266
2409
client_dict["encrypted_secret"] = (client
3273
2416
del client_settings[client.name]["secret"]
3274
2417
3275
2418
try:
3276
with tempfile.NamedTemporaryFile(
3277
mode='wb',
3278
suffix=".pickle",
3279
prefix='clients-',
3280
dir=os.path.dirname(stored_state_path),
3281
delete=False) as stored_state:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
3282
2424
pickle.dump((clients, client_settings), stored_state)
3283
tempname = stored_state.name
3284
2425
os.rename(tempname, stored_state_path)
3285
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
3286
2429
if not debug:
3287
2430
try:
3288
2431
os.remove(tempname)
3289
2432
except NameError:
3290
2433
pass
3291
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3292
logger.warning("Could not save persistent state: {}"
3293
.format(os.strerror(e.errno)))
3294
else:
3295
logger.warning("Could not save persistent state:",
3296
exc_info=e)
3297
raise
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
3298
2437
3299
2438
# Delete all clients, and settings from config
3300
2439
while tcp_server.clients:
3301
2440
name, client = tcp_server.clients.popitem()
3302
2441
if use_dbus:
3303
2442
client.remove_from_connection()
3304
# Don't signal the disabling
2443
# Don't signal anything except ClientRemoved
3305
2444
client.disable(quiet=True)
3306
# Emit D-Bus signal for removal
3307
2445
if use_dbus:
3308
mandos_dbus_service.client_removed_signal(client)
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
3309
2450
client_settings.clear()
3310
2451
3311
2452
atexit.register(cleanup)
3312
2453
3313
2454
for client in tcp_server.clients.itervalues():
3314
2455
if use_dbus:
3315
# Emit D-Bus signal for adding
3316
mandos_dbus_service.client_added_signal(client)
2456
# Emit D-Bus signal
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3317
2458
# Need to initiate checking of clients
3318
2459
if client.enabled:
3319
2460
client.init_checker()
3322
2463
tcp_server.server_activate()
3323
2464
3324
2465
# Find out what port we got
3325
if zeroconf:
3326
service.port = tcp_server.socket.getsockname()[1]
2466
service.port = tcp_server.socket.getsockname()[1]
3327
2467
if use_ipv6:
3328
2468
logger.info("Now listening on address %r, port %d,"
3329
" flowinfo %d, scope_id %d",
3330
*tcp_server.socket.getsockname())
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
3331
2471
else: # IPv4
3332
logger.info("Now listening on address %r, port %d",
3333
*tcp_server.socket.getsockname())
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
3334
2474
3335
2475
#service.interface = tcp_server.socket.getsockname()[3]
3336
2476
3337
2477
try:
3338
if zeroconf:
3339
# From the Avahi example code
3340
try:
3341
service.activate()
3342
except dbus.exceptions.DBusException as error:
3343
logger.critical("D-Bus Exception", exc_info=error)
3344
cleanup()
3345
sys.exit(1)
3346
# End of Avahi example code
2478
# From the Avahi example code
2479
try:
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
2484
sys.exit(1)
2485
# End of Avahi example code
3347
2486
3348
2487
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3349
2488
lambda *args, **kwargs:
3353
2492
logger.debug("Starting main loop")
3354
2493
main_loop.run()
3355
2494
except AvahiError as error:
3356
logger.critical("Avahi Error", exc_info=error)
2495
logger.critical("AvahiError: %s", error)
3357
2496
cleanup()
3358
2497
sys.exit(1)
3359
2498
except KeyboardInterrupt:
3364
2503
# Must run before the D-Bus bus name gets deregistered
3365
2504
cleanup()
3366
2505
3367
3368
2506
if __name__ == '__main__':
3369
2507
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0