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- Committer: Teddy Hogeborn
- Date: 2015-07-12 01:41:14 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150712014114-qbala4mutkixxct3
Handle local Zeroconf service name collisions on startup, too.
* mandos (AvahiService.server_state_changed): Catch name collision
error when adding
server.
* mandos (AvahiService.server_state_changed): Catch name collision
error when adding
server.
- files added:
- debian/upstream
- plugin-helpers
- files modified:
- DBUS-API
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
36
36
37
37
from future_builtins import *
38
38
39
import SocketServer as socketserver
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
40
43
import socket
41
44
import argparse
42
45
import datetime
47
50
import gnutls.library.functions
48
51
import gnutls.library.constants
49
52
import gnutls.library.types
50
import ConfigParser as configparser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
51
57
import sys
52
58
import re
53
59
import os
62
68
import struct
63
69
import fcntl
64
70
import functools
65
import cPickle as pickle
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
66
75
import multiprocessing
67
76
import types
68
77
import binascii
69
78
import tempfile
70
79
import itertools
71
80
import collections
81
import codecs
72
82
73
83
import dbus
74
84
import dbus.service
75
import gobject
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
76
89
import avahi
77
90
from dbus.mainloop.glib import DBusGMainLoop
78
91
import ctypes
79
92
import ctypes.util
80
93
import xml.dom.minidom
81
94
import inspect
82
import GnuPGInterface
83
95
84
96
try:
85
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
89
101
except ImportError:
90
102
SO_BINDTODEVICE = None
91
103
92
version = "1.6.0"
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
93
108
stored_state_file = "clients.pickle"
94
109
95
110
logger = logging.getLogger()
96
syslogger = (logging.handlers.SysLogHandler
97
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
98
address = str("/dev/log")))
111
syslogger = None
99
112
100
113
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
104
116
except (OSError, AttributeError):
117
105
118
def if_nametoindex(interface):
106
119
"Get an interface index the hard way, i.e. using fcntl()"
107
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
121
with contextlib.closing(socket.socket()) as s:
109
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(str("16s16x"),
111
interface))
112
interface_index = struct.unpack(str("I"),
113
ifreq[16:20])[0]
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
114
125
return interface_index
115
126
116
127
117
128
def initlogger(debug, level=logging.WARNING):
118
129
"""init logger and add loglevel"""
119
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
120
135
syslogger.setFormatter(logging.Formatter
121
136
('Mandos [%(process)d]: %(levelname)s:'
122
137
' %(message)s'))
139
154
140
155
class PGPEngine(object):
141
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
142
158
def __init__(self):
143
self.gnupg = GnuPGInterface.GnuPG()
144
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupg = GnuPGInterface.GnuPG()
146
self.gnupg.options.meta_interactive = False
147
self.gnupg.options.homedir = self.tempdir
148
self.gnupg.options.extra_args.extend(['--force-mdc',
149
'--quiet',
150
'--no-use-agent'])
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
151
165
152
166
def __enter__(self):
153
167
return self
175
189
def password_encode(self, password):
176
190
# Passphrase can not be empty and can not contain newlines or
177
191
# NUL bytes. So we prefix it and hex encode it.
178
return b"mandos" + binascii.hexlify(password)
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
198
return encoded
179
199
180
200
def encrypt(self, data, password):
181
self.gnupg.passphrase = self.password_encode(password)
182
with open(os.devnull, "w") as devnull:
183
try:
184
proc = self.gnupg.run(['--symmetric'],
185
create_fhs=['stdin', 'stdout'],
186
attach_fhs={'stderr': devnull})
187
with contextlib.closing(proc.handles['stdin']) as f:
188
f.write(data)
189
with contextlib.closing(proc.handles['stdout']) as f:
190
ciphertext = f.read()
191
proc.wait()
192
except IOError as e:
193
raise PGPError(e)
194
self.gnupg.passphrase = None
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
205
passfile.flush()
206
proc = subprocess.Popen(['gpg', '--symmetric',
207
'--passphrase-file',
208
passfile.name]
209
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
215
raise PGPError(err)
195
216
return ciphertext
196
217
197
218
def decrypt(self, data, password):
198
self.gnupg.passphrase = self.password_encode(password)
199
with open(os.devnull, "w") as devnull:
200
try:
201
proc = self.gnupg.run(['--decrypt'],
202
create_fhs=['stdin', 'stdout'],
203
attach_fhs={'stderr': devnull})
204
with contextlib.closing(proc.handles['stdin']) as f:
205
f.write(data)
206
with contextlib.closing(proc.handles['stdout']) as f:
207
decrypted_plaintext = f.read()
208
proc.wait()
209
except IOError as e:
210
raise PGPError(e)
211
self.gnupg.passphrase = None
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
223
passfile.flush()
224
proc = subprocess.Popen(['gpg', '--decrypt',
225
'--passphrase-file',
226
passfile.name]
227
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
233
raise PGPError(err)
212
234
return decrypted_plaintext
213
235
214
236
215
237
class AvahiError(Exception):
216
238
def __init__(self, value, *args, **kwargs):
217
239
self.value = value
218
super(AvahiError, self).__init__(value, *args, **kwargs)
219
def __unicode__(self):
220
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
221
243
222
244
class AvahiServiceError(AvahiError):
223
245
pass
224
246
247
225
248
class AvahiGroupError(AvahiError):
226
249
pass
227
250
234
257
Used to optionally bind to the specified interface.
235
258
name: string; Example: 'Mandos'
236
259
type: string; Example: '_mandos._tcp'.
237
See <http://www.dns-sd.org/ServiceTypes.html>
260
See <https://www.iana.org/assignments/service-names-port-numbers>
238
261
port: integer; what port to announce
239
262
TXT: list of strings; TXT record for the service
240
263
domain: string; Domain to publish on, default to .local if empty.
247
270
bus: dbus.SystemBus()
248
271
"""
249
272
250
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
251
servicetype = None, port = None, TXT = None,
252
domain = "", host = "", max_renames = 32768,
253
protocol = avahi.PROTO_UNSPEC, bus = None):
273
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
254
284
self.interface = interface
255
285
self.name = name
256
286
self.type = servicetype
266
296
self.bus = bus
267
297
self.entry_group_state_changed_match = None
268
298
269
def rename(self):
299
def rename(self, remove=True):
270
300
"""Derived from the Avahi example code"""
271
301
if self.rename_count >= self.max_renames:
272
302
logger.critical("No suitable Zeroconf service name found"
273
303
" after %i retries, exiting.",
274
304
self.rename_count)
275
305
raise AvahiServiceError("Too many renames")
276
self.name = unicode(self.server
277
.GetAlternativeServiceName(self.name))
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
278
309
logger.info("Changing Zeroconf service name to %r ...",
279
310
self.name)
280
self.remove()
311
if remove:
312
self.remove()
281
313
try:
282
314
self.add()
283
315
except dbus.exceptions.DBusException as error:
284
logger.critical("D-Bus Exception", exc_info=error)
285
self.cleanup()
286
os._exit(1)
287
self.rename_count += 1
316
if (error.get_dbus_name()
317
== "org.freedesktop.Avahi.CollisionError"):
318
logger.info("Local Zeroconf service name collision.")
319
return self.rename(remove=False)
320
else:
321
logger.critical("D-Bus Exception", exc_info=error)
322
self.cleanup()
323
os._exit(1)
288
324
289
325
def remove(self):
290
326
"""Derived from the Avahi example code"""
328
364
self.rename()
329
365
elif state == avahi.ENTRY_GROUP_FAILURE:
330
366
logger.critical("Avahi: Error in group state changed %s",
331
unicode(error))
332
raise AvahiGroupError("State changed: {0!s}"
333
.format(error))
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
334
369
335
370
def cleanup(self):
336
371
"""Derived from the Avahi example code"""
346
381
def server_state_changed(self, state, error=None):
347
382
"""Derived from the Avahi example code"""
348
383
logger.debug("Avahi server state change: %i", state)
349
bad_states = { avahi.SERVER_INVALID:
350
"Zeroconf server invalid",
351
avahi.SERVER_REGISTERING: None,
352
avahi.SERVER_COLLISION:
353
"Zeroconf server name collision",
354
avahi.SERVER_FAILURE:
355
"Zeroconf server failure" }
384
bad_states = {
385
avahi.SERVER_INVALID: "Zeroconf server invalid",
386
avahi.SERVER_REGISTERING: None,
387
avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
avahi.SERVER_FAILURE: "Zeroconf server failure",
389
}
356
390
if state in bad_states:
357
391
if bad_states[state] is not None:
358
392
if error is None:
361
395
logger.error(bad_states[state] + ": %r", error)
362
396
self.cleanup()
363
397
elif state == avahi.SERVER_RUNNING:
364
self.add()
398
try:
399
self.add()
400
except dbus.exceptions.DBusException as error:
401
if (error.get_dbus_name()
402
== "org.freedesktop.Avahi.CollisionError"):
403
logger.info("Local Zeroconf service name"
404
" collision.")
405
return self.rename(remove=False)
406
else:
407
logger.critical("D-Bus Exception", exc_info=error)
408
self.cleanup()
409
os._exit(1)
365
410
else:
366
411
if error is None:
367
412
logger.debug("Unknown state: %r", state)
377
422
follow_name_owner_changes=True),
378
423
avahi.DBUS_INTERFACE_SERVER)
379
424
self.server.connect_to_signal("StateChanged",
380
self.server_state_changed)
425
self.server_state_changed)
381
426
self.server_state_changed(self.server.GetState())
382
427
383
428
384
429
class AvahiServiceToSyslog(AvahiService):
385
def rename(self):
430
def rename(self, *args, **kwargs):
386
431
"""Add the new name to the syslog messages"""
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
391
.format(self.name)))
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
435
.format(self.name)))
392
436
return ret
393
437
394
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
400
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
441
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
444
"""
445
connection.send(func(*args, **kwargs))
446
connection.close()
401
447
402
448
class Client(object):
403
449
"""A representation of a client host served by this server.
430
476
last_checker_status: integer between 0 and 255 reflecting exit
431
477
status of last checker. -1 reflects crashed
432
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
433
481
last_enabled: datetime.datetime(); (UTC) or None
434
482
name: string; from the config file, used in log messages and
435
483
D-Bus identifiers
440
488
runtime_expansions: Allowed attributes for runtime expansion.
441
489
expires: datetime.datetime(); time (UTC) when a client will be
442
490
disabled, or None
491
server_settings: The server_settings dict from main()
443
492
"""
444
493
445
494
runtime_expansions = ("approval_delay", "approval_duration",
447
496
"fingerprint", "host", "interval",
448
497
"last_approval_request", "last_checked_ok",
449
498
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
460
461
def timeout_milliseconds(self):
462
"Return the 'timeout' attribute in milliseconds"
463
return timedelta_to_milliseconds(self.timeout)
464
465
def extended_timeout_milliseconds(self):
466
"Return the 'extended_timeout' attribute in milliseconds"
467
return timedelta_to_milliseconds(self.extended_timeout)
468
469
def interval_milliseconds(self):
470
"Return the 'interval' attribute in milliseconds"
471
return timedelta_to_milliseconds(self.interval)
472
473
def approval_delay_milliseconds(self):
474
return timedelta_to_milliseconds(self.approval_delay)
499
client_defaults = {
500
"timeout": "PT5M",
501
"extended_timeout": "PT15M",
502
"interval": "PT2M",
503
"checker": "fping -q -- %%(host)s",
504
"host": "",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
508
"enabled": "True",
509
}
475
510
476
511
@staticmethod
477
512
def config_parser(config):
493
528
client["enabled"] = config.getboolean(client_name,
494
529
"enabled")
495
530
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
496
534
client["fingerprint"] = (section["fingerprint"].upper()
497
535
.replace(" ", ""))
498
536
if "secret" in section:
503
541
"rb") as secfile:
504
542
client["secret"] = secfile.read()
505
543
else:
506
raise TypeError("No secret or secfile for section {0}"
544
raise TypeError("No secret or secfile for section {}"
507
545
.format(section))
508
546
client["timeout"] = string_to_delta(section["timeout"])
509
547
client["extended_timeout"] = string_to_delta(
520
558
521
559
return settings
522
560
523
def __init__(self, settings, name = None):
561
def __init__(self, settings, name = None, server_settings=None):
524
562
self.name = name
563
if server_settings is None:
564
server_settings = {}
565
self.server_settings = server_settings
525
566
# adding all client settings
526
for setting, value in settings.iteritems():
567
for setting, value in settings.items():
527
568
setattr(self, setting, value)
528
569
529
570
if self.enabled:
537
578
self.expires = None
538
579
539
580
logger.debug("Creating client %r", self.name)
540
# Uppercase and remove spaces from fingerprint for later
541
# comparison purposes with return value from the fingerprint()
542
# function
543
581
logger.debug(" Fingerprint: %s", self.fingerprint)
544
582
self.created = settings.get("created",
545
583
datetime.datetime.utcnow())
552
590
self.current_checker_command = None
553
591
self.approved = None
554
592
self.approvals_pending = 0
555
self.changedstate = (multiprocessing_manager
556
.Condition(multiprocessing_manager
557
.Lock()))
558
self.client_structure = [attr for attr in
559
self.__dict__.iterkeys()
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
560
597
if not attr.startswith("_")]
561
598
self.client_structure.append("client_structure")
562
599
563
for name, t in inspect.getmembers(type(self),
564
lambda obj:
565
isinstance(obj,
566
property)):
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
567
602
if not name.startswith("_"):
568
603
self.client_structure.append(name)
569
604
611
646
# and every interval from then on.
612
647
if self.checker_initiator_tag is not None:
613
648
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = (gobject.timeout_add
615
(self.interval_milliseconds(),
616
self.start_checker))
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
651
self.start_checker)
617
652
# Schedule a disable() when 'timeout' has passed
618
653
if self.disable_initiator_tag is not None:
619
654
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = (gobject.timeout_add
621
(self.timeout_milliseconds(),
622
self.disable))
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
623
657
# Also start a new checker *right now*.
624
658
self.start_checker()
625
659
626
def checker_callback(self, pid, condition, command):
660
def checker_callback(self, source, condition, connection,
661
command):
627
662
"""The checker has completed, so take appropriate actions."""
628
663
self.checker_callback_tag = None
629
664
self.checker = None
630
if os.WIFEXITED(condition):
631
self.last_checker_status = os.WEXITSTATUS(condition)
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
667
connection.close()
668
669
if returncode >= 0:
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
632
672
if self.last_checker_status == 0:
633
673
logger.info("Checker for %(name)s succeeded",
634
674
vars(self))
635
675
self.checked_ok()
636
676
else:
637
logger.info("Checker for %(name)s failed",
638
vars(self))
677
logger.info("Checker for %(name)s failed", vars(self))
639
678
else:
640
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
641
681
logger.warning("Checker for %(name)s crashed?",
642
682
vars(self))
683
return False
643
684
644
685
def checked_ok(self):
645
686
"""Assert that the client has been seen, alive and well."""
646
687
self.last_checked_ok = datetime.datetime.utcnow()
647
688
self.last_checker_status = 0
689
self.last_checker_signal = None
648
690
self.bump_timeout()
649
691
650
692
def bump_timeout(self, timeout=None):
655
697
gobject.source_remove(self.disable_initiator_tag)
656
698
self.disable_initiator_tag = None
657
699
if getattr(self, "enabled", False):
658
self.disable_initiator_tag = (gobject.timeout_add
659
(timedelta_to_milliseconds
660
(timeout), self.disable))
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
661
702
self.expires = datetime.datetime.utcnow() + timeout
662
703
663
704
def need_approval(self):
677
718
# than 'timeout' for the client to be disabled, which is as it
678
719
# should be.
679
720
680
# If a checker exists, make sure it is not a zombie
681
try:
682
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
683
except (AttributeError, OSError) as error:
684
if (isinstance(error, OSError)
685
and error.errno != errno.ECHILD):
686
raise error
687
else:
688
if pid:
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
723
self.checker.join()
724
self.checker = None
693
725
# Start a new checker if needed
694
726
if self.checker is None:
695
727
# Escape attributes for the shell
696
escaped_attrs = dict(
697
(attr, re.escape(unicode(getattr(self, attr))))
698
for attr in
699
self.runtime_expansions)
728
escaped_attrs = {
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
700
731
try:
701
732
command = self.checker_command % escaped_attrs
702
733
except TypeError as error:
703
734
logger.error('Could not format string "%s"',
704
self.checker_command, exc_info=error)
705
return True # Try again later
735
self.checker_command,
736
exc_info=error)
737
return True # Try again later
706
738
self.current_checker_command = command
707
try:
708
logger.info("Starting checker %r for %s",
709
command, self.name)
710
# We don't need to redirect stdout and stderr, since
711
# in normal mode, that is already done by daemon(),
712
# and in debug mode we don't want to. (Stdin is
713
# always replaced by /dev/null.)
714
self.checker = subprocess.Popen(command,
715
close_fds=True,
716
shell=True, cwd="/")
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
self.checker_callback_tag = (gobject.child_watch_add
721
(self.checker.pid,
722
self.checker_callback,
723
data=command))
724
# The checker may have completed before the gobject
725
# watch was added. Check for this.
726
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
if pid:
728
gobject.source_remove(self.checker_callback_tag)
729
self.checker_callback(pid, status, command)
739
logger.info("Starting checker %r for %s", command,
740
self.name)
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
747
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
760
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
730
764
# Re-run this periodically if run by gobject.timeout_add
731
765
return True
732
766
738
772
if getattr(self, "checker", None) is None:
739
773
return
740
774
logger.debug("Stopping checker for %(name)s", vars(self))
741
try:
742
self.checker.terminate()
743
#time.sleep(0.5)
744
#if self.checker.poll() is None:
745
# self.checker.kill()
746
except OSError as error:
747
if error.errno != errno.ESRCH: # No such process
748
raise
775
self.checker.terminate()
749
776
self.checker = None
750
777
751
778
752
def dbus_service_property(dbus_interface, signature="v",
753
access="readwrite", byte_arrays=False):
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
754
783
"""Decorators for marking methods of a DBusObjectWithProperties to
755
784
become properties on the D-Bus.
756
785
765
794
# "Set" method, so we fail early here:
766
795
if byte_arrays and signature != "ay":
767
796
raise ValueError("Byte arrays not supported for non-'ay'"
768
" signature {0!r}".format(signature))
797
" signature {!r}".format(signature))
798
769
799
def decorator(func):
770
800
func._dbus_is_property = True
771
801
func._dbus_interface = dbus_interface
776
806
func._dbus_name = func._dbus_name[:-14]
777
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
778
808
return func
809
779
810
return decorator
780
811
781
812
790
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
791
822
"false"}
792
823
"""
824
793
825
def decorator(func):
794
826
func._dbus_is_interface = True
795
827
func._dbus_interface = dbus_interface
796
828
func._dbus_name = dbus_interface
797
829
return func
830
798
831
return decorator
799
832
800
833
802
835
"""Decorator to annotate D-Bus methods, signals or properties
803
836
Usage:
804
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
805
841
@dbus_service_property("org.example.Interface", signature="b",
806
842
access="r")
807
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
808
"org.freedesktop.DBus.Property."
809
"EmitsChangedSignal": "false"})
810
843
def Property_dbus_property(self):
811
844
return dbus.Boolean(False)
812
845
"""
846
813
847
def decorator(func):
814
848
func._dbus_annotations = annotations
815
849
return func
850
816
851
return decorator
817
852
818
853
819
854
class DBusPropertyException(dbus.exceptions.DBusException):
820
855
"""A base class for D-Bus property-related exceptions
821
856
"""
822
def __unicode__(self):
823
return unicode(str(self))
857
pass
824
858
825
859
826
860
class DBusPropertyAccessException(DBusPropertyException):
850
884
If called like _is_dbus_thing("method") it returns a function
851
885
suitable for use as predicate to inspect.getmembers().
852
886
"""
853
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
854
888
False)
855
889
856
890
def _get_all_dbus_things(self, thing):
857
891
"""Returns a generator of (name, attribute) pairs
858
892
"""
859
return ((getattr(athing.__get__(self), "_dbus_name",
860
name),
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
861
894
athing.__get__(self))
862
895
for cls in self.__class__.__mro__
863
896
for name, athing in
864
inspect.getmembers(cls,
865
self._is_dbus_thing(thing)))
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
866
898
867
899
def _get_dbus_property(self, interface_name, property_name):
868
900
"""Returns a bound method if one exists which is a D-Bus
869
901
property with the specified name and interface.
870
902
"""
871
for cls in self.__class__.__mro__:
872
for name, value in (inspect.getmembers
873
(cls,
874
self._is_dbus_thing("property"))):
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
875
906
if (value._dbus_name == property_name
876
907
and value._dbus_interface == interface_name):
877
908
return value.__get__(self)
878
909
879
910
# No such property
880
raise DBusPropertyNotFound(self.dbus_object_path + ":"
881
+ interface_name + "."
882
+ property_name)
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
883
913
884
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
885
916
out_signature="v")
886
917
def Get(self, interface_name, property_name):
887
918
"""Standard D-Bus property Get() method, see D-Bus standard.
905
936
# The byte_arrays option is not supported yet on
906
937
# signatures other than "ay".
907
938
if prop._dbus_signature != "ay":
908
raise ValueError
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
909
942
value = dbus.ByteArray(b''.join(chr(byte)
910
943
for byte in value))
911
944
prop(value)
912
945
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
914
948
out_signature="a{sv}")
915
949
def GetAll(self, interface_name):
916
950
"""Standard D-Bus property GetAll() method, see D-Bus
931
965
if not hasattr(value, "variant_level"):
932
966
properties[name] = value
933
967
continue
934
properties[name] = type(value)(value, variant_level=
935
value.variant_level+1)
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
936
970
return dbus.Dictionary(properties, signature="sv")
937
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
938
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
939
981
out_signature="s",
940
982
path_keyword='object_path',
948
990
connection)
949
991
try:
950
992
document = xml.dom.minidom.parseString(xmlstring)
993
951
994
def make_tag(document, name, prop):
952
995
e = document.createElement("property")
953
996
e.setAttribute("name", name)
954
997
e.setAttribute("type", prop._dbus_signature)
955
998
e.setAttribute("access", prop._dbus_access)
956
999
return e
1000
957
1001
for if_tag in document.getElementsByTagName("interface"):
958
1002
# Add property tags
959
1003
for tag in (make_tag(document, name, prop)
971
1015
if (name == tag.getAttribute("name")
972
1016
and prop._dbus_interface
973
1017
== if_tag.getAttribute("name")):
974
annots.update(getattr
975
(prop,
976
"_dbus_annotations",
977
{}))
978
for name, value in annots.iteritems():
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
979
1021
ann_tag = document.createElement(
980
1022
"annotation")
981
1023
ann_tag.setAttribute("name", name)
984
1026
# Add interface annotation tags
985
1027
for annotation, value in dict(
986
1028
itertools.chain.from_iterable(
987
annotations().iteritems()
988
for name, annotations in
989
self._get_all_dbus_things("interface")
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
990
1032
if name == if_tag.getAttribute("name")
991
)).iteritems():
1033
)).items():
992
1034
ann_tag = document.createElement("annotation")
993
1035
ann_tag.setAttribute("name", annotation)
994
1036
ann_tag.setAttribute("value", value)
1021
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
1064
if dt is None:
1023
1065
return dbus.String("", variant_level = variant_level)
1024
return dbus.String(dt.isoformat(),
1025
variant_level=variant_level)
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1026
1067
1027
1068
1028
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
1089
(from DBusObjectWithProperties) and interfaces (from the
1049
1090
dbus_interface_annotations decorator).
1050
1091
"""
1092
1051
1093
def wrapper(cls):
1052
1094
for orig_interface_name, alt_interface_name in (
1053
alt_interface_names.iteritems()):
1095
alt_interface_names.items()):
1054
1096
attr = {}
1055
1097
interface_names = set()
1056
1098
# Go though all attributes of the class
1058
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
1059
1101
# with the wrong interface name
1060
1102
if (not hasattr(attribute, "_dbus_interface")
1061
or not attribute._dbus_interface
1062
.startswith(orig_interface_name)):
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
1063
1105
continue
1064
1106
# Create an alternate D-Bus interface name based on
1065
1107
# the current name
1066
alt_interface = (attribute._dbus_interface
1067
.replace(orig_interface_name,
1068
alt_interface_name))
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1069
1110
interface_names.add(alt_interface)
1070
1111
# Is this a D-Bus signal?
1071
1112
if getattr(attribute, "_dbus_is_signal", False):
1072
# Extract the original non-method function by
1073
# black magic
1074
nonmethod_func = (dict(
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
1075
1117
zip(attribute.func_code.co_freevars,
1076
attribute.__closure__))["func"]
1077
.cell_contents)
1118
attribute.__closure__))
1119
["func"].cell_contents)
1120
else:
1121
nonmethod_func = attribute
1078
1122
# Create a new, but exactly alike, function
1079
1123
# object, and decorate it to be a new D-Bus signal
1080
1124
# with the alternate D-Bus interface name
1081
new_function = (dbus.service.signal
1082
(alt_interface,
1083
attribute._dbus_signature)
1084
(types.FunctionType(
1085
nonmethod_func.func_code,
1086
nonmethod_func.func_globals,
1087
nonmethod_func.func_name,
1088
nonmethod_func.func_defaults,
1089
nonmethod_func.func_closure)))
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1132
else:
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1140
alt_interface,
1141
attribute._dbus_signature)(new_function))
1090
1142
# Copy annotations, if any
1091
1143
try:
1092
new_function._dbus_annotations = (
1093
dict(attribute._dbus_annotations))
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1094
1146
except AttributeError:
1095
1147
pass
1096
1148
# Define a creator of a function to call both the
1101
1153
"""This function is a scope container to pass
1102
1154
func1 and func2 to the "call_both" function
1103
1155
outside of its arguments"""
1156
1104
1157
def call_both(*args, **kwargs):
1105
1158
"""This function will emit two D-Bus
1106
1159
signals by calling func1 and func2"""
1107
1160
func1(*args, **kwargs)
1108
1161
func2(*args, **kwargs)
1162
1109
1163
return call_both
1110
1164
# Create the "call_both" function and add it to
1111
1165
# the class
1116
1170
# object. Decorate it to be a new D-Bus method
1117
1171
# with the alternate D-Bus interface name. Add it
1118
1172
# to the class.
1119
attr[attrname] = (dbus.service.method
1120
(alt_interface,
1121
attribute._dbus_in_signature,
1122
attribute._dbus_out_signature)
1123
(types.FunctionType
1124
(attribute.func_code,
1125
attribute.func_globals,
1126
attribute.func_name,
1127
attribute.func_defaults,
1128
attribute.func_closure)))
1173
attr[attrname] = (
1174
dbus.service.method(
1175
alt_interface,
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1129
1183
# Copy annotations, if any
1130
1184
try:
1131
attr[attrname]._dbus_annotations = (
1132
dict(attribute._dbus_annotations))
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1133
1187
except AttributeError:
1134
1188
pass
1135
1189
# Is this a D-Bus property?
1138
1192
# object, and decorate it to be a new D-Bus
1139
1193
# property with the alternate D-Bus interface
1140
1194
# name. Add it to the class.
1141
attr[attrname] = (dbus_service_property
1142
(alt_interface,
1143
attribute._dbus_signature,
1144
attribute._dbus_access,
1145
attribute
1146
._dbus_get_args_options
1147
["byte_arrays"])
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1199
["byte_arrays"])
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1154
1206
# Copy annotations, if any
1155
1207
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1158
1210
except AttributeError:
1159
1211
pass
1160
1212
# Is this a D-Bus interface?
1163
1215
# object. Decorate it to be a new D-Bus interface
1164
1216
# with the alternate D-Bus interface name. Add it
1165
1217
# to the class.
1166
attr[attrname] = (dbus_interface_annotations
1167
(alt_interface)
1168
(types.FunctionType
1169
(attribute.func_code,
1170
attribute.func_globals,
1171
attribute.func_name,
1172
attribute.func_defaults,
1173
attribute.func_closure)))
1218
attr[attrname] = (
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1174
1225
if deprecate:
1175
1226
# Deprecate all alternate interfaces
1176
iname="_AlternateDBusNames_interface_annotation{0}"
1227
iname="_AlternateDBusNames_interface_annotation{}"
1177
1228
for interface_name in interface_names:
1229
1178
1230
@dbus_interface_annotations(interface_name)
1179
1231
def func(self):
1180
1232
return { "org.freedesktop.DBus.Deprecated":
1181
"true" }
1233
"true" }
1182
1234
# Find an unused name
1183
1235
for aname in (iname.format(i)
1184
1236
for i in itertools.count()):
1188
1240
if interface_names:
1189
1241
# Replace the class with a new subclass of it with
1190
1242
# methods, signals, etc. as created above.
1191
cls = type(b"{0}Alternate".format(cls.__name__),
1192
(cls,), attr)
1243
cls = type(b"{}Alternate".format(cls.__name__),
1244
(cls, ), attr)
1193
1245
return cls
1246
1194
1247
return wrapper
1195
1248
1196
1249
1197
1250
@alternate_dbus_interfaces({"se.recompile.Mandos":
1198
"se.bsnet.fukt.Mandos"})
1251
"se.bsnet.fukt.Mandos"})
1199
1252
class ClientDBus(Client, DBusObjectWithProperties):
1200
1253
"""A Client class using D-Bus
1201
1254
1205
1258
"""
1206
1259
1207
1260
runtime_expansions = (Client.runtime_expansions
1208
+ ("dbus_object_path",))
1261
+ ("dbus_object_path", ))
1262
1263
_interface = "se.recompile.Mandos.Client"
1209
1264
1210
1265
# dbus.service.Object doesn't use super(), so we can't either.
1211
1266
1214
1269
Client.__init__(self, *args, **kwargs)
1215
1270
# Only now, when this client is initialized, can it show up on
1216
1271
# the D-Bus
1217
client_object_name = unicode(self.name).translate(
1272
client_object_name = str(self.name).translate(
1218
1273
{ord("."): ord("_"),
1219
1274
ord("-"): ord("_")})
1220
self.dbus_object_path = (dbus.ObjectPath
1221
("/clients/" + client_object_name))
1275
self.dbus_object_path = dbus.ObjectPath(
1276
"/clients/" + client_object_name)
1222
1277
DBusObjectWithProperties.__init__(self, self.bus,
1223
1278
self.dbus_object_path)
1224
1279
1225
def notifychangeproperty(transform_func,
1226
dbus_name, type_func=lambda x: x,
1227
variant_level=1):
1280
def notifychangeproperty(transform_func, dbus_name,
1281
type_func=lambda x: x,
1282
variant_level=1,
1283
invalidate_only=False,
1284
_interface=_interface):
1228
1285
""" Modify a variable so that it's a property which announces
1229
1286
its changes to DBus.
1230
1287
1235
1292
to the D-Bus. Default: no transform
1236
1293
variant_level: D-Bus variant level. Default: 1
1237
1294
"""
1238
attrname = "_{0}".format(dbus_name)
1295
attrname = "_{}".format(dbus_name)
1296
1239
1297
def setter(self, value):
1240
1298
if hasattr(self, "dbus_object_path"):
1241
1299
if (not hasattr(self, attrname) or
1242
1300
type_func(getattr(self, attrname, None))
1243
1301
!= type_func(value)):
1244
dbus_value = transform_func(type_func(value),
1245
variant_level
1246
=variant_level)
1247
self.PropertyChanged(dbus.String(dbus_name),
1248
dbus_value)
1302
if invalidate_only:
1303
self.PropertiesChanged(
1304
_interface, dbus.Dictionary(),
1305
dbus.Array((dbus_name, )))
1306
else:
1307
dbus_value = transform_func(
1308
type_func(value),
1309
variant_level = variant_level)
1310
self.PropertyChanged(dbus.String(dbus_name),
1311
dbus_value)
1312
self.PropertiesChanged(
1313
_interface,
1314
dbus.Dictionary({ dbus.String(dbus_name):
1315
dbus_value }),
1316
dbus.Array())
1249
1317
setattr(self, attrname, value)
1250
1318
1251
1319
return property(lambda self: getattr(self, attrname), setter)
1257
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1258
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
1259
1327
"LastEnabled")
1260
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1261
type_func = lambda checker:
1262
checker is not None)
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1263
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1264
1332
"LastCheckedOK")
1265
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1268
1336
datetime_to_dbus, "LastApprovalRequest")
1269
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
1270
1338
"ApprovedByDefault")
1271
approval_delay = notifychangeproperty(dbus.UInt64,
1272
"ApprovalDelay",
1273
type_func =
1274
timedelta_to_milliseconds)
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1275
1342
approval_duration = notifychangeproperty(
1276
1343
dbus.UInt64, "ApprovalDuration",
1277
type_func = timedelta_to_milliseconds)
1344
type_func = lambda td: td.total_seconds() * 1000)
1278
1345
host = notifychangeproperty(dbus.String, "Host")
1279
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1280
type_func =
1281
timedelta_to_milliseconds)
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1282
1349
extended_timeout = notifychangeproperty(
1283
1350
dbus.UInt64, "ExtendedTimeout",
1284
type_func = timedelta_to_milliseconds)
1285
interval = notifychangeproperty(dbus.UInt64,
1286
"Interval",
1287
type_func =
1288
timedelta_to_milliseconds)
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1289
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1290
1358
1291
1359
del notifychangeproperty
1292
1360
1299
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1300
1368
Client.__del__(self, *args, **kwargs)
1301
1369
1302
def checker_callback(self, pid, condition, command,
1303
*args, **kwargs):
1304
self.checker_callback_tag = None
1305
self.checker = None
1306
if os.WIFEXITED(condition):
1307
exitstatus = os.WEXITSTATUS(condition)
1370
def checker_callback(self, source, condition,
1371
connection, command, *args, **kwargs):
1372
ret = Client.checker_callback(self, source, condition,
1373
connection, command, *args,
1374
**kwargs)
1375
exitstatus = self.last_checker_status
1376
if exitstatus >= 0:
1308
1377
# Emit D-Bus signal
1309
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
1310
dbus.Int64(condition),
1379
dbus.Int64(0),
1311
1380
dbus.String(command))
1312
1381
else:
1313
1382
# Emit D-Bus signal
1314
1383
self.CheckerCompleted(dbus.Int16(-1),
1315
dbus.Int64(condition),
1384
dbus.Int64(
1385
self.last_checker_signal),
1316
1386
dbus.String(command))
1317
1318
return Client.checker_callback(self, pid, condition, command,
1319
*args, **kwargs)
1387
return ret
1320
1388
1321
1389
def start_checker(self, *args, **kwargs):
1322
old_checker = self.checker
1323
if self.checker is not None:
1324
old_checker_pid = self.checker.pid
1325
else:
1326
old_checker_pid = None
1390
old_checker_pid = getattr(self.checker, "pid", None)
1327
1391
r = Client.start_checker(self, *args, **kwargs)
1328
1392
# Only if new checker process was started
1329
1393
if (self.checker is not None
1338
1402
1339
1403
def approve(self, value=True):
1340
1404
self.approved = value
1341
gobject.timeout_add(timedelta_to_milliseconds
1342
(self.approval_duration),
1343
self._reset_approved)
1405
gobject.timeout_add(int(self.approval_duration.total_seconds()
1406
* 1000), self._reset_approved)
1344
1407
self.send_changedstate()
1345
1408
1346
1409
## D-Bus methods, signals & properties
1347
_interface = "se.recompile.Mandos.Client"
1348
1410
1349
1411
## Interfaces
1350
1412
1351
@dbus_interface_annotations(_interface)
1352
def _foo(self):
1353
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1354
"false"}
1355
1356
1413
## Signals
1357
1414
1358
1415
# CheckerCompleted - signal
1368
1425
pass
1369
1426
1370
1427
# PropertyChanged - signal
1428
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1371
1429
@dbus.service.signal(_interface, signature="sv")
1372
1430
def PropertyChanged(self, property, value):
1373
1431
"D-Bus signal"
1437
1495
return dbus.Boolean(bool(self.approvals_pending))
1438
1496
1439
1497
# ApprovedByDefault - property
1440
@dbus_service_property(_interface, signature="b",
1498
@dbus_service_property(_interface,
1499
signature="b",
1441
1500
access="readwrite")
1442
1501
def ApprovedByDefault_dbus_property(self, value=None):
1443
1502
if value is None: # get
1445
1504
self.approved_by_default = bool(value)
1446
1505
1447
1506
# ApprovalDelay - property
1448
@dbus_service_property(_interface, signature="t",
1507
@dbus_service_property(_interface,
1508
signature="t",
1449
1509
access="readwrite")
1450
1510
def ApprovalDelay_dbus_property(self, value=None):
1451
1511
if value is None: # get
1452
return dbus.UInt64(self.approval_delay_milliseconds())
1512
return dbus.UInt64(self.approval_delay.total_seconds()
1513
* 1000)
1453
1514
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
1515
1455
1516
# ApprovalDuration - property
1456
@dbus_service_property(_interface, signature="t",
1517
@dbus_service_property(_interface,
1518
signature="t",
1457
1519
access="readwrite")
1458
1520
def ApprovalDuration_dbus_property(self, value=None):
1459
1521
if value is None: # get
1460
return dbus.UInt64(timedelta_to_milliseconds(
1461
self.approval_duration))
1522
return dbus.UInt64(self.approval_duration.total_seconds()
1523
* 1000)
1462
1524
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
1525
1464
1526
# Name - property
1472
1534
return dbus.String(self.fingerprint)
1473
1535
1474
1536
# Host - property
1475
@dbus_service_property(_interface, signature="s",
1537
@dbus_service_property(_interface,
1538
signature="s",
1476
1539
access="readwrite")
1477
1540
def Host_dbus_property(self, value=None):
1478
1541
if value is None: # get
1479
1542
return dbus.String(self.host)
1480
self.host = unicode(value)
1543
self.host = str(value)
1481
1544
1482
1545
# Created - property
1483
1546
@dbus_service_property(_interface, signature="s", access="read")
1490
1553
return datetime_to_dbus(self.last_enabled)
1491
1554
1492
1555
# Enabled - property
1493
@dbus_service_property(_interface, signature="b",
1556
@dbus_service_property(_interface,
1557
signature="b",
1494
1558
access="readwrite")
1495
1559
def Enabled_dbus_property(self, value=None):
1496
1560
if value is None: # get
1501
1565
self.disable()
1502
1566
1503
1567
# LastCheckedOK - property
1504
@dbus_service_property(_interface, signature="s",
1568
@dbus_service_property(_interface,
1569
signature="s",
1505
1570
access="readwrite")
1506
1571
def LastCheckedOK_dbus_property(self, value=None):
1507
1572
if value is not None:
1510
1575
return datetime_to_dbus(self.last_checked_ok)
1511
1576
1512
1577
# LastCheckerStatus - property
1513
@dbus_service_property(_interface, signature="n",
1514
access="read")
1578
@dbus_service_property(_interface, signature="n", access="read")
1515
1579
def LastCheckerStatus_dbus_property(self):
1516
1580
return dbus.Int16(self.last_checker_status)
1517
1581
1526
1590
return datetime_to_dbus(self.last_approval_request)
1527
1591
1528
1592
# Timeout - property
1529
@dbus_service_property(_interface, signature="t",
1593
@dbus_service_property(_interface,
1594
signature="t",
1530
1595
access="readwrite")
1531
1596
def Timeout_dbus_property(self, value=None):
1532
1597
if value is None: # get
1533
return dbus.UInt64(self.timeout_milliseconds())
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1534
1599
old_timeout = self.timeout
1535
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1536
1601
# Reschedule disabling
1545
1610
is None):
1546
1611
return
1547
1612
gobject.source_remove(self.disable_initiator_tag)
1548
self.disable_initiator_tag = (
1549
gobject.timeout_add(
1550
timedelta_to_milliseconds(self.expires - now),
1551
self.disable))
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1615
self.disable)
1552
1616
1553
1617
# ExtendedTimeout - property
1554
@dbus_service_property(_interface, signature="t",
1618
@dbus_service_property(_interface,
1619
signature="t",
1555
1620
access="readwrite")
1556
1621
def ExtendedTimeout_dbus_property(self, value=None):
1557
1622
if value is None: # get
1558
return dbus.UInt64(self.extended_timeout_milliseconds())
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1624
* 1000)
1559
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
1626
1561
1627
# Interval - property
1562
@dbus_service_property(_interface, signature="t",
1628
@dbus_service_property(_interface,
1629
signature="t",
1563
1630
access="readwrite")
1564
1631
def Interval_dbus_property(self, value=None):
1565
1632
if value is None: # get
1566
return dbus.UInt64(self.interval_milliseconds())
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1567
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1568
1635
if getattr(self, "checker_initiator_tag", None) is None:
1569
1636
return
1570
1637
if self.enabled:
1571
1638
# Reschedule checker run
1572
1639
gobject.source_remove(self.checker_initiator_tag)
1573
self.checker_initiator_tag = (gobject.timeout_add
1574
(value, self.start_checker))
1575
self.start_checker() # Start one now, too
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1576
1643
1577
1644
# Checker - property
1578
@dbus_service_property(_interface, signature="s",
1645
@dbus_service_property(_interface,
1646
signature="s",
1579
1647
access="readwrite")
1580
1648
def Checker_dbus_property(self, value=None):
1581
1649
if value is None: # get
1582
1650
return dbus.String(self.checker_command)
1583
self.checker_command = unicode(value)
1651
self.checker_command = str(value)
1584
1652
1585
1653
# CheckerRunning - property
1586
@dbus_service_property(_interface, signature="b",
1654
@dbus_service_property(_interface,
1655
signature="b",
1587
1656
access="readwrite")
1588
1657
def CheckerRunning_dbus_property(self, value=None):
1589
1658
if value is None: # get
1599
1668
return self.dbus_object_path # is already a dbus.ObjectPath
1600
1669
1601
1670
# Secret = property
1602
@dbus_service_property(_interface, signature="ay",
1603
access="write", byte_arrays=True)
1671
@dbus_service_property(_interface,
1672
signature="ay",
1673
access="write",
1674
byte_arrays=True)
1604
1675
def Secret_dbus_property(self, value):
1605
self.secret = str(value)
1676
self.secret = bytes(value)
1606
1677
1607
1678
del _interface
1608
1679
1612
1683
self._pipe = child_pipe
1613
1684
self._pipe.send(('init', fpr, address))
1614
1685
if not self._pipe.recv():
1615
raise KeyError()
1686
raise KeyError(fpr)
1616
1687
1617
1688
def __getattribute__(self, name):
1618
1689
if name == '_pipe':
1622
1693
if data[0] == 'data':
1623
1694
return data[1]
1624
1695
if data[0] == 'function':
1696
1625
1697
def func(*args, **kwargs):
1626
1698
self._pipe.send(('funcall', name, args, kwargs))
1627
1699
return self._pipe.recv()[1]
1700
1628
1701
return func
1629
1702
1630
1703
def __setattr__(self, name, value):
1642
1715
def handle(self):
1643
1716
with contextlib.closing(self.server.child_pipe) as child_pipe:
1644
1717
logger.info("TCP connection from: %s",
1645
unicode(self.client_address))
1718
str(self.client_address))
1646
1719
logger.debug("Pipe FD: %d",
1647
1720
self.server.child_pipe.fileno())
1648
1721
1649
session = (gnutls.connection
1650
.ClientSession(self.request,
1651
gnutls.connection
1652
.X509Credentials()))
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
1653
1724
1654
1725
# Note: gnutls.connection.X509Credentials is really a
1655
1726
# generic GnuTLS certificate credentials object so long as
1664
1735
priority = self.server.gnutls_priority
1665
1736
if priority is None:
1666
1737
priority = "NORMAL"
1667
(gnutls.library.functions
1668
.gnutls_priority_set_direct(session._c_object,
1669
priority, None))
1738
gnutls.library.functions.gnutls_priority_set_direct(
1739
session._c_object, priority, None)
1670
1740
1671
1741
# Start communication using the Mandos protocol
1672
1742
# Get protocol number
1674
1744
logger.debug("Protocol version: %r", line)
1675
1745
try:
1676
1746
if int(line.strip().split()[0]) > 1:
1677
raise RuntimeError
1747
raise RuntimeError(line)
1678
1748
except (ValueError, IndexError, RuntimeError) as error:
1679
1749
logger.error("Unknown protocol version: %s", error)
1680
1750
return
1692
1762
approval_required = False
1693
1763
try:
1694
1764
try:
1695
fpr = self.fingerprint(self.peer_certificate
1696
(session))
1765
fpr = self.fingerprint(
1766
self.peer_certificate(session))
1697
1767
except (TypeError,
1698
1768
gnutls.errors.GNUTLSError) as error:
1699
1769
logger.warning("Bad certificate: %s", error)
1714
1784
while True:
1715
1785
if not client.enabled:
1716
1786
logger.info("Client %s is disabled",
1717
client.name)
1787
client.name)
1718
1788
if self.server.use_dbus:
1719
1789
# Emit D-Bus signal
1720
1790
client.Rejected("Disabled")
1729
1799
if self.server.use_dbus:
1730
1800
# Emit D-Bus signal
1731
1801
client.NeedApproval(
1732
client.approval_delay_milliseconds(),
1733
client.approved_by_default)
1802
client.approval_delay.total_seconds()
1803
* 1000, client.approved_by_default)
1734
1804
else:
1735
1805
logger.warning("Client %s was not approved",
1736
1806
client.name)
1742
1812
#wait until timeout or approved
1743
1813
time = datetime.datetime.now()
1744
1814
client.changedstate.acquire()
1745
client.changedstate.wait(
1746
float(timedelta_to_milliseconds(delay)
1747
/ 1000))
1815
client.changedstate.wait(delay.total_seconds())
1748
1816
client.changedstate.release()
1749
1817
time2 = datetime.datetime.now()
1750
1818
if (time2 - time) >= delay:
1769
1837
logger.warning("gnutls send failed",
1770
1838
exc_info=error)
1771
1839
return
1772
logger.debug("Sent: %d, remaining: %d",
1773
sent, len(client.secret)
1774
- (sent_size + sent))
1840
logger.debug("Sent: %d, remaining: %d", sent,
1841
len(client.secret) - (sent_size
1842
+ sent))
1775
1843
sent_size += sent
1776
1844
1777
1845
logger.info("Sending secret to %s", client.name)
1794
1862
def peer_certificate(session):
1795
1863
"Return the peer's OpenPGP certificate as a bytestring"
1796
1864
# If not an OpenPGP certificate...
1797
if (gnutls.library.functions
1798
.gnutls_certificate_type_get(session._c_object)
1865
if (gnutls.library.functions.gnutls_certificate_type_get(
1866
session._c_object)
1799
1867
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1800
1868
# ...do the normal thing
1801
1869
return session.peer_certificate
1815
1883
def fingerprint(openpgp):
1816
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1817
1885
# New GnuTLS "datum" with the OpenPGP public key
1818
datum = (gnutls.library.types
1819
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1820
ctypes.POINTER
1821
(ctypes.c_ubyte)),
1822
ctypes.c_uint(len(openpgp))))
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
1823
1890
# New empty GnuTLS certificate
1824
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1825
(gnutls.library.functions
1826
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1893
ctypes.byref(crt))
1827
1894
# Import the OpenPGP public key into the certificate
1828
(gnutls.library.functions
1829
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1830
gnutls.library.constants
1831
.GNUTLS_OPENPGP_FMT_RAW))
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1832
1898
# Verify the self signature in the key
1833
1899
crtverify = ctypes.c_uint()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_verify_self(crt, 0,
1836
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1837
1902
if crtverify.value != 0:
1838
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1839
raise (gnutls.errors.CertificateSecurityError
1840
("Verify failed"))
1904
raise gnutls.errors.CertificateSecurityError(
1905
"Verify failed")
1841
1906
# New buffer for the fingerprint
1842
1907
buf = ctypes.create_string_buffer(20)
1843
1908
buf_len = ctypes.c_size_t()
1844
1909
# Get the fingerprint from the certificate into the buffer
1845
(gnutls.library.functions
1846
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1847
ctypes.byref(buf_len)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1848
1912
# Deinit the certificate
1849
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1850
1914
# Convert the buffer to a Python bytestring
1856
1920
1857
1921
class MultiprocessingMixIn(object):
1858
1922
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1923
1859
1924
def sub_process_main(self, request, address):
1860
1925
try:
1861
1926
self.finish_request(request, address)
1873
1938
1874
1939
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1875
1940
""" adds a pipe to the MixIn """
1941
1876
1942
def process_request(self, request, client_address):
1877
1943
"""Overrides and wraps the original process_request().
1878
1944
1887
1953
1888
1954
def add_pipe(self, parent_pipe, proc):
1889
1955
"""Dummy function; override as necessary"""
1890
raise NotImplementedError
1956
raise NotImplementedError()
1891
1957
1892
1958
1893
1959
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1899
1965
interface: None or a network interface name (string)
1900
1966
use_ipv6: Boolean; to use IPv6 or not
1901
1967
"""
1968
1902
1969
def __init__(self, server_address, RequestHandlerClass,
1903
interface=None, use_ipv6=True, socketfd=None):
1970
interface=None,
1971
use_ipv6=True,
1972
socketfd=None):
1904
1973
"""If socketfd is set, use that file descriptor instead of
1905
1974
creating a new one with socket.socket().
1906
1975
"""
1947
2016
self.interface)
1948
2017
else:
1949
2018
try:
1950
self.socket.setsockopt(socket.SOL_SOCKET,
1951
SO_BINDTODEVICE,
1952
str(self.interface + '\0'))
2019
self.socket.setsockopt(
2020
socket.SOL_SOCKET, SO_BINDTODEVICE,
2021
(self.interface + "\0").encode("utf-8"))
1953
2022
except socket.error as error:
1954
2023
if error.errno == errno.EPERM:
1955
2024
logger.error("No permission to bind to"
1969
2038
if self.address_family == socket.AF_INET6:
1970
2039
any_address = "::" # in6addr_any
1971
2040
else:
1972
any_address = socket.INADDR_ANY
2041
any_address = "0.0.0.0" # INADDR_ANY
1973
2042
self.server_address = (any_address,
1974
2043
self.server_address[1])
1975
2044
elif not self.server_address[1]:
1976
self.server_address = (self.server_address[0],
1977
0)
2045
self.server_address = (self.server_address[0], 0)
1978
2046
# if self.interface:
1979
2047
# self.server_address = (self.server_address[0],
1980
2048
# 0, # port
1994
2062
1995
2063
Assumes a gobject.MainLoop event loop.
1996
2064
"""
2065
1997
2066
def __init__(self, server_address, RequestHandlerClass,
1998
interface=None, use_ipv6=True, clients=None,
1999
gnutls_priority=None, use_dbus=True, socketfd=None):
2067
interface=None,
2068
use_ipv6=True,
2069
clients=None,
2070
gnutls_priority=None,
2071
use_dbus=True,
2072
socketfd=None):
2000
2073
self.enabled = False
2001
2074
self.clients = clients
2002
2075
if self.clients is None:
2008
2081
interface = interface,
2009
2082
use_ipv6 = use_ipv6,
2010
2083
socketfd = socketfd)
2084
2011
2085
def server_activate(self):
2012
2086
if self.enabled:
2013
2087
return socketserver.TCPServer.server_activate(self)
2017
2091
2018
2092
def add_pipe(self, parent_pipe, proc):
2019
2093
# Call "handle_ipc" for both data and EOF events
2020
gobject.io_add_watch(parent_pipe.fileno(),
2021
gobject.IO_IN | gobject.IO_HUP,
2022
functools.partial(self.handle_ipc,
2023
parent_pipe =
2024
parent_pipe,
2025
proc = proc))
2094
gobject.io_add_watch(
2095
parent_pipe.fileno(),
2096
gobject.IO_IN | gobject.IO_HUP,
2097
functools.partial(self.handle_ipc,
2098
parent_pipe = parent_pipe,
2099
proc = proc))
2026
2100
2027
def handle_ipc(self, source, condition, parent_pipe=None,
2028
proc = None, client_object=None):
2101
def handle_ipc(self, source, condition,
2102
parent_pipe=None,
2103
proc = None,
2104
client_object=None):
2029
2105
# error, or the other end of multiprocessing.Pipe has closed
2030
2106
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2031
2107
# Wait for other process to exit
2054
2130
parent_pipe.send(False)
2055
2131
return False
2056
2132
2057
gobject.io_add_watch(parent_pipe.fileno(),
2058
gobject.IO_IN | gobject.IO_HUP,
2059
functools.partial(self.handle_ipc,
2060
parent_pipe =
2061
parent_pipe,
2062
proc = proc,
2063
client_object =
2064
client))
2133
gobject.io_add_watch(
2134
parent_pipe.fileno(),
2135
gobject.IO_IN | gobject.IO_HUP,
2136
functools.partial(self.handle_ipc,
2137
parent_pipe = parent_pipe,
2138
proc = proc,
2139
client_object = client))
2065
2140
parent_pipe.send(True)
2066
2141
# remove the old hook in favor of the new above hook on
2067
2142
# same fileno
2073
2148
2074
2149
parent_pipe.send(('data', getattr(client_object,
2075
2150
funcname)(*args,
2076
**kwargs)))
2151
**kwargs)))
2077
2152
2078
2153
if command == 'getattr':
2079
2154
attrname = request[1]
2080
if callable(client_object.__getattribute__(attrname)):
2081
parent_pipe.send(('function',))
2155
if isinstance(client_object.__getattribute__(attrname),
2156
collections.Callable):
2157
parent_pipe.send(('function', ))
2082
2158
else:
2083
parent_pipe.send(('data', client_object
2084
.__getattribute__(attrname)))
2159
parent_pipe.send((
2160
'data', client_object.__getattribute__(attrname)))
2085
2161
2086
2162
if command == 'setattr':
2087
2163
attrname = request[1]
2118
2194
# avoid excessive use of external libraries.
2119
2195
2120
2196
# New type for defining tokens, syntax, and semantics all-in-one
2121
Token = collections.namedtuple("Token",
2122
("regexp", # To match token; if
2123
# "value" is not None,
2124
# must have a "group"
2125
# containing digits
2126
"value", # datetime.timedelta or
2127
# None
2128
"followers")) # Tokens valid after
2129
# this token
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2130
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2131
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2132
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2133
2205
token_second = Token(re.compile(r"(\d+)S"),
2134
2206
datetime.timedelta(seconds=1),
2135
frozenset((token_end,)))
2207
frozenset((token_end, )))
2136
2208
token_minute = Token(re.compile(r"(\d+)M"),
2137
2209
datetime.timedelta(minutes=1),
2138
2210
frozenset((token_second, token_end)))
2154
2226
frozenset((token_month, token_end)))
2155
2227
token_week = Token(re.compile(r"(\d+)W"),
2156
2228
datetime.timedelta(weeks=1),
2157
frozenset((token_end,)))
2229
frozenset((token_end, )))
2158
2230
token_duration = Token(re.compile(r"P"), None,
2159
2231
frozenset((token_year, token_month,
2160
2232
token_day, token_time,
2161
token_week))),
2233
token_week)))
2162
2234
# Define starting values
2163
2235
value = datetime.timedelta() # Value so far
2164
2236
found_token = None
2165
followers = frozenset(token_duration,) # Following valid tokens
2237
followers = frozenset((token_duration, )) # Following valid tokens
2166
2238
s = duration # String left to parse
2167
2239
# Loop until end token is found
2168
2240
while found_token is not token_end:
2185
2257
break
2186
2258
else:
2187
2259
# No currently valid tokens were found
2188
raise ValueError("Invalid RFC 3339 duration")
2260
raise ValueError("Invalid RFC 3339 duration: {!r}"
2261
.format(duration))
2189
2262
# End token found
2190
2263
return value
2191
2264
2215
2288
timevalue = datetime.timedelta(0)
2216
2289
for s in interval.split():
2217
2290
try:
2218
suffix = unicode(s[-1])
2291
suffix = s[-1]
2219
2292
value = int(s[:-1])
2220
2293
if suffix == "d":
2221
2294
delta = datetime.timedelta(value)
2228
2301
elif suffix == "w":
2229
2302
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2230
2303
else:
2231
raise ValueError("Unknown suffix {0!r}"
2232
.format(suffix))
2233
except (ValueError, IndexError) as e:
2304
raise ValueError("Unknown suffix {!r}".format(suffix))
2305
except IndexError as e:
2234
2306
raise ValueError(*(e.args))
2235
2307
timevalue += delta
2236
2308
return timevalue
2252
2324
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2253
2325
if not stat.S_ISCHR(os.fstat(null).st_mode):
2254
2326
raise OSError(errno.ENODEV,
2255
"{0} not a character device"
2327
"{} not a character device"
2256
2328
.format(os.devnull))
2257
2329
os.dup2(null, sys.stdin.fileno())
2258
2330
os.dup2(null, sys.stdout.fileno())
2268
2340
2269
2341
parser = argparse.ArgumentParser()
2270
2342
parser.add_argument("-v", "--version", action="version",
2271
version = "%(prog)s {0}".format(version),
2343
version = "%(prog)s {}".format(version),
2272
2344
help="show version number and exit")
2273
2345
parser.add_argument("-i", "--interface", metavar="IF",
2274
2346
help="Bind to interface IF")
2280
2352
help="Run self-test")
2281
2353
parser.add_argument("--debug", action="store_true",
2282
2354
help="Debug mode; run in foreground and log"
2283
" to terminal")
2355
" to terminal", default=None)
2284
2356
parser.add_argument("--debuglevel", metavar="LEVEL",
2285
2357
help="Debug level for stdout output")
2286
2358
parser.add_argument("--priority", help="GnuTLS"
2293
2365
" files")
2294
2366
parser.add_argument("--no-dbus", action="store_false",
2295
2367
dest="use_dbus", help="Do not provide D-Bus"
2296
" system bus interface")
2368
" system bus interface", default=None)
2297
2369
parser.add_argument("--no-ipv6", action="store_false",
2298
dest="use_ipv6", help="Do not use IPv6")
2370
dest="use_ipv6", help="Do not use IPv6",
2371
default=None)
2299
2372
parser.add_argument("--no-restore", action="store_false",
2300
2373
dest="restore", help="Do not restore stored"
2301
" state")
2374
" state", default=None)
2302
2375
parser.add_argument("--socket", type=int,
2303
2376
help="Specify a file descriptor to a network"
2304
2377
" socket to use instead of creating one")
2305
2378
parser.add_argument("--statedir", metavar="DIR",
2306
2379
help="Directory to save/restore state in")
2307
2380
parser.add_argument("--foreground", action="store_true",
2308
help="Run in foreground")
2381
help="Run in foreground", default=None)
2382
parser.add_argument("--no-zeroconf", action="store_false",
2383
dest="zeroconf", help="Do not use Zeroconf",
2384
default=None)
2309
2385
2310
2386
options = parser.parse_args()
2311
2387
2312
2388
if options.check:
2313
2389
import doctest
2314
doctest.testmod()
2315
sys.exit()
2390
fail_count, test_count = doctest.testmod()
2391
sys.exit(os.EX_OK if fail_count == 0 else 1)
2316
2392
2317
2393
# Default values for config file for server-global settings
2318
2394
server_defaults = { "interface": "",
2320
2396
"port": "",
2321
2397
"debug": "False",
2322
2398
"priority":
2323
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2324
2401
"servicename": "Mandos",
2325
2402
"use_dbus": "True",
2326
2403
"use_ipv6": "True",
2329
2406
"socket": "",
2330
2407
"statedir": "/var/lib/mandos",
2331
2408
"foreground": "False",
2332
}
2409
"zeroconf": "True",
2410
}
2333
2411
2334
2412
# Parse config file for server-global settings
2335
2413
server_config = configparser.SafeConfigParser(server_defaults)
2336
2414
del server_defaults
2337
server_config.read(os.path.join(options.configdir,
2338
"mandos.conf"))
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2339
2416
# Convert the SafeConfigParser object to a dict
2340
2417
server_settings = server_config.defaults()
2341
2418
# Use the appropriate methods on the non-string config options
2359
2436
# Override the settings from the config file with command line
2360
2437
# options, if set.
2361
2438
for option in ("interface", "address", "port", "debug",
2362
"priority", "servicename", "configdir",
2363
"use_dbus", "use_ipv6", "debuglevel", "restore",
2364
"statedir", "socket", "foreground"):
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
2365
2442
value = getattr(options, option)
2366
2443
if value is not None:
2367
2444
server_settings[option] = value
2368
2445
del options
2369
2446
# Force all strings to be unicode
2370
2447
for option in server_settings.keys():
2371
if type(server_settings[option]) is str:
2372
server_settings[option] = unicode(server_settings[option])
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2450
.decode("utf-8"))
2451
# Force all boolean options to be boolean
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2454
server_settings[option] = bool(server_settings[option])
2373
2455
# Debug implies foreground
2374
2456
if server_settings["debug"]:
2375
2457
server_settings["foreground"] = True
2377
2459
2378
2460
##################################################################
2379
2461
2462
if (not server_settings["zeroconf"]
2463
and not (server_settings["port"]
2464
or server_settings["socket"] != "")):
2465
parser.error("Needs port or socket to work without Zeroconf")
2466
2380
2467
# For convenience
2381
2468
debug = server_settings["debug"]
2382
2469
debuglevel = server_settings["debuglevel"]
2385
2472
stored_state_path = os.path.join(server_settings["statedir"],
2386
2473
stored_state_file)
2387
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2388
2476
2389
2477
if debug:
2390
2478
initlogger(debug, logging.DEBUG)
2396
2484
initlogger(debug, level)
2397
2485
2398
2486
if server_settings["servicename"] != "Mandos":
2399
syslogger.setFormatter(logging.Formatter
2400
('Mandos ({0}) [%(process)d]:'
2401
' %(levelname)s: %(message)s'
2402
.format(server_settings
2403
["servicename"])))
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
2404
2491
2405
2492
# Parse config file with clients
2406
2493
client_config = configparser.SafeConfigParser(Client
2411
2498
global mandos_dbus_service
2412
2499
mandos_dbus_service = None
2413
2500
2414
tcp_server = MandosServer((server_settings["address"],
2415
server_settings["port"]),
2416
ClientHandler,
2417
interface=(server_settings["interface"]
2418
or None),
2419
use_ipv6=use_ipv6,
2420
gnutls_priority=
2421
server_settings["priority"],
2422
use_dbus=use_dbus,
2423
socketfd=(server_settings["socket"]
2424
or None))
2501
socketfd = None
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2506
ClientHandler,
2507
interface=(server_settings["interface"] or None),
2508
use_ipv6=use_ipv6,
2509
gnutls_priority=server_settings["priority"],
2510
use_dbus=use_dbus,
2511
socketfd=socketfd)
2425
2512
if not foreground:
2426
pidfilename = "/var/run/mandos.pid"
2513
pidfilename = "/run/mandos.pid"
2514
if not os.path.isdir("/run/."):
2515
pidfilename = "/var/run/mandos.pid"
2427
2516
pidfile = None
2428
2517
try:
2429
pidfile = open(pidfilename, "w")
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2430
2519
except IOError as e:
2431
2520
logger.error("Could not open file %r", pidfilename,
2432
2521
exc_info=e)
2446
2535
os.setuid(uid)
2447
2536
except OSError as error:
2448
2537
if error.errno != errno.EPERM:
2449
raise error
2538
raise
2450
2539
2451
2540
if debug:
2452
2541
# Enable all possible GnuTLS debugging
2459
2548
def debug_gnutls(level, string):
2460
2549
logger.debug("GnuTLS: %s", string[:-1])
2461
2550
2462
(gnutls.library.functions
2463
.gnutls_global_set_log_function(debug_gnutls))
2551
gnutls.library.functions.gnutls_global_set_log_function(
2552
debug_gnutls)
2464
2553
2465
2554
# Redirect stdin so all checkers get /dev/null
2466
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2486
2575
if use_dbus:
2487
2576
try:
2488
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2489
bus, do_not_queue=True)
2490
old_bus_name = (dbus.service.BusName
2491
("se.bsnet.fukt.Mandos", bus,
2492
do_not_queue=True))
2493
except dbus.exceptions.NameExistsException as e:
2578
bus,
2579
do_not_queue=True)
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2582
do_not_queue=True)
2583
except dbus.exceptions.DBusException as e:
2494
2584
logger.error("Disabling D-Bus:", exc_info=e)
2495
2585
use_dbus = False
2496
2586
server_settings["use_dbus"] = False
2497
2587
tcp_server.use_dbus = False
2498
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2499
service = AvahiServiceToSyslog(name =
2500
server_settings["servicename"],
2501
servicetype = "_mandos._tcp",
2502
protocol = protocol, bus = bus)
2503
if server_settings["interface"]:
2504
service.interface = (if_nametoindex
2505
(str(server_settings["interface"])))
2588
if zeroconf:
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2594
bus = bus)
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
server_settings["interface"].encode("utf-8"))
2506
2598
2507
2599
global multiprocessing_manager
2508
2600
multiprocessing_manager = multiprocessing.Manager()
2515
2607
old_client_settings = {}
2516
2608
clients_data = {}
2517
2609
2610
# This is used to redirect stdout and stderr for checker processes
2611
global wnull
2612
wnull = open(os.devnull, "w") # A writable /dev/null
2613
# Only used if server is running in foreground but not in debug
2614
# mode
2615
if debug or not foreground:
2616
wnull.close()
2617
2518
2618
# Get client data and settings from last running state.
2519
2619
if server_settings["restore"]:
2520
2620
try:
2521
2621
with open(stored_state_path, "rb") as stored_state:
2522
clients_data, old_client_settings = (pickle.load
2523
(stored_state))
2622
clients_data, old_client_settings = pickle.load(
2623
stored_state)
2524
2624
os.remove(stored_state_path)
2525
2625
except IOError as e:
2526
2626
if e.errno == errno.ENOENT:
2527
logger.warning("Could not load persistent state: {0}"
2528
.format(os.strerror(e.errno)))
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2529
2629
else:
2530
2630
logger.critical("Could not load persistent state:",
2531
2631
exc_info=e)
2532
2632
raise
2533
2633
except EOFError as e:
2534
2634
logger.warning("Could not load persistent state: "
2535
"EOFError:", exc_info=e)
2635
"EOFError:",
2636
exc_info=e)
2536
2637
2537
2638
with PGPEngine() as pgp:
2538
for client_name, client in clients_data.iteritems():
2639
for client_name, client in clients_data.items():
2640
# Skip removed clients
2641
if client_name not in client_settings:
2642
continue
2643
2539
2644
# Decide which value to use after restoring saved state.
2540
2645
# We have three different values: Old config file,
2541
2646
# new config file, and saved state.
2546
2651
# For each value in new config, check if it
2547
2652
# differs from the old config value (Except for
2548
2653
# the "secret" attribute)
2549
if (name != "secret" and
2550
value != old_client_settings[client_name]
2551
[name]):
2654
if (name != "secret"
2655
and (value !=
2656
old_client_settings[client_name][name])):
2552
2657
client[name] = value
2553
2658
except KeyError:
2554
2659
pass
2555
2660
2556
2661
# Clients who has passed its expire date can still be
2557
# enabled if its last checker was successful. Clients
2662
# enabled if its last checker was successful. A Client
2558
2663
# whose checker succeeded before we stored its state is
2559
2664
# assumed to have successfully run all checkers during
2560
2665
# downtime.
2562
2667
if datetime.datetime.utcnow() >= client["expires"]:
2563
2668
if not client["last_checked_ok"]:
2564
2669
logger.warning(
2565
"disabling client {0} - Client never "
2566
"performed a successful checker"
2567
.format(client_name))
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2672
client_name))
2568
2673
client["enabled"] = False
2569
2674
elif client["last_checker_status"] != 0:
2570
2675
logger.warning(
2571
"disabling client {0} - Client "
2572
"last checker failed with error code {1}"
2573
.format(client_name,
2574
client["last_checker_status"]))
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2678
" {}".format(
2679
client_name,
2680
client["last_checker_status"]))
2575
2681
client["enabled"] = False
2576
2682
else:
2577
client["expires"] = (datetime.datetime
2578
.utcnow()
2579
+ client["timeout"])
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2580
2686
logger.debug("Last checker succeeded,"
2581
" keeping {0} enabled"
2582
.format(client_name))
2687
" keeping {} enabled".format(
2688
client_name))
2583
2689
try:
2584
client["secret"] = (
2585
pgp.decrypt(client["encrypted_secret"],
2586
client_settings[client_name]
2587
["secret"]))
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2588
2693
except PGPError:
2589
2694
# If decryption fails, we use secret from new settings
2590
logger.debug("Failed to decrypt {0} old secret"
2591
.format(client_name))
2592
client["secret"] = (
2593
client_settings[client_name]["secret"])
2695
logger.debug("Failed to decrypt {} old secret".format(
2696
client_name))
2697
client["secret"] = (client_settings[client_name]
2698
["secret"])
2594
2699
2595
2700
# Add/remove clients based on new changes made to config
2596
2701
for client_name in (set(old_client_settings)
2601
2706
clients_data[client_name] = client_settings[client_name]
2602
2707
2603
2708
# Create all client objects
2604
for client_name, client in clients_data.iteritems():
2709
for client_name, client in clients_data.items():
2605
2710
tcp_server.clients[client_name] = client_class(
2606
name = client_name, settings = client)
2711
name = client_name,
2712
settings = client,
2713
server_settings = server_settings)
2607
2714
2608
2715
if not tcp_server.clients:
2609
2716
logger.warning("No clients defined")
2610
2717
2611
2718
if not foreground:
2612
2719
if pidfile is not None:
2720
pid = os.getpid()
2613
2721
try:
2614
2722
with pidfile:
2615
pid = os.getpid()
2616
pidfile.write(str(pid) + "\n".encode("utf-8"))
2723
print(pid, file=pidfile)
2617
2724
except IOError:
2618
2725
logger.error("Could not write to file %r with PID %d",
2619
2726
pidfilename, pid)
2624
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2625
2732
2626
2733
if use_dbus:
2627
@alternate_dbus_interfaces({"se.recompile.Mandos":
2628
"se.bsnet.fukt.Mandos"})
2734
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2629
2737
class MandosDBusService(DBusObjectWithProperties):
2630
2738
"""A D-Bus proxy object"""
2739
2631
2740
def __init__(self):
2632
2741
dbus.service.Object.__init__(self, bus, "/")
2742
2633
2743
_interface = "se.recompile.Mandos"
2634
2744
2635
2745
@dbus_interface_annotations(_interface)
2636
2746
def _foo(self):
2637
return { "org.freedesktop.DBus.Property"
2638
".EmitsChangedSignal":
2639
"false"}
2747
return {
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2749
"false" }
2640
2750
2641
2751
@dbus.service.signal(_interface, signature="o")
2642
2752
def ClientAdded(self, objpath):
2656
2766
@dbus.service.method(_interface, out_signature="ao")
2657
2767
def GetAllClients(self):
2658
2768
"D-Bus method"
2659
return dbus.Array(c.dbus_object_path
2660
for c in
2769
return dbus.Array(c.dbus_object_path for c in
2661
2770
tcp_server.clients.itervalues())
2662
2771
2663
2772
@dbus.service.method(_interface,
2665
2774
def GetAllClientsWithProperties(self):
2666
2775
"D-Bus method"
2667
2776
return dbus.Dictionary(
2668
((c.dbus_object_path, c.GetAll(""))
2669
for c in tcp_server.clients.itervalues()),
2777
{ c.dbus_object_path: c.GetAll("")
2778
for c in tcp_server.clients.itervalues() },
2670
2779
signature="oa{sv}")
2671
2780
2672
2781
@dbus.service.method(_interface, in_signature="o")
2689
2798
2690
2799
def cleanup():
2691
2800
"Cleanup function; run on exit"
2692
service.cleanup()
2801
if zeroconf:
2802
service.cleanup()
2693
2803
2694
2804
multiprocessing.active_children()
2805
wnull.close()
2695
2806
if not (tcp_server.clients or client_settings):
2696
2807
return
2697
2808
2708
2819
2709
2820
# A list of attributes that can not be pickled
2710
2821
# + secret.
2711
exclude = set(("bus", "changedstate", "secret",
2712
"checker"))
2713
for name, typ in (inspect.getmembers
2714
(dbus.service.Object)):
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2825
.Object):
2715
2826
exclude.add(name)
2716
2827
2717
2828
client_dict["encrypted_secret"] = (client
2724
2835
del client_settings[client.name]["secret"]
2725
2836
2726
2837
try:
2727
with (tempfile.NamedTemporaryFile
2728
(mode='wb', suffix=".pickle", prefix='clients-',
2729
dir=os.path.dirname(stored_state_path),
2730
delete=False)) as stored_state:
2838
with tempfile.NamedTemporaryFile(
2839
mode='wb',
2840
suffix=".pickle",
2841
prefix='clients-',
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2731
2844
pickle.dump((clients, client_settings), stored_state)
2732
tempname=stored_state.name
2845
tempname = stored_state.name
2733
2846
os.rename(tempname, stored_state_path)
2734
2847
except (IOError, OSError) as e:
2735
2848
if not debug:
2738
2851
except NameError:
2739
2852
pass
2740
2853
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2741
logger.warning("Could not save persistent state: {0}"
2854
logger.warning("Could not save persistent state: {}"
2742
2855
.format(os.strerror(e.errno)))
2743
2856
else:
2744
2857
logger.warning("Could not save persistent state:",
2745
2858
exc_info=e)
2746
raise e
2859
raise
2747
2860
2748
2861
# Delete all clients, and settings from config
2749
2862
while tcp_server.clients:
2754
2867
client.disable(quiet=True)
2755
2868
if use_dbus:
2756
2869
# Emit D-Bus signal
2757
mandos_dbus_service.ClientRemoved(client
2758
.dbus_object_path,
2759
client.name)
2870
mandos_dbus_service.ClientRemoved(
2871
client.dbus_object_path, client.name)
2760
2872
client_settings.clear()
2761
2873
2762
2874
atexit.register(cleanup)
2773
2885
tcp_server.server_activate()
2774
2886
2775
2887
# Find out what port we got
2776
service.port = tcp_server.socket.getsockname()[1]
2888
if zeroconf:
2889
service.port = tcp_server.socket.getsockname()[1]
2777
2890
if use_ipv6:
2778
2891
logger.info("Now listening on address %r, port %d,"
2779
2892
" flowinfo %d, scope_id %d",
2785
2898
#service.interface = tcp_server.socket.getsockname()[3]
2786
2899
2787
2900
try:
2788
# From the Avahi example code
2789
try:
2790
service.activate()
2791
except dbus.exceptions.DBusException as error:
2792
logger.critical("D-Bus Exception", exc_info=error)
2793
cleanup()
2794
sys.exit(1)
2795
# End of Avahi example code
2901
if zeroconf:
2902
# From the Avahi example code
2903
try:
2904
service.activate()
2905
except dbus.exceptions.DBusException as error:
2906
logger.critical("D-Bus Exception", exc_info=error)
2907
cleanup()
2908
sys.exit(1)
2909
# End of Avahi example code
2796
2910
2797
2911
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2798
2912
lambda *args, **kwargs:
2813
2927
# Must run before the D-Bus bus name gets deregistered
2814
2928
cleanup()
2815
2929
2930
2816
2931
if __name__ == '__main__':
2817
2932
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0