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- Committer: Björn Påhlsson
- Date: 2011-12-21 00:33:12 UTC
- mfrom: (505.2.13 mandos-client-network-hooks)
- Revision ID: belorn@recompile.se-20111221003312-jwn6d76u2c2lejoz
working new feature: network-hooks - Enables user-scripts to take up
interfaces during bootup
interfaces during bootup
- files removed:
- debian/mandos-client.examples
- debian/upstream
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
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13
# Everything else is
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 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
37
import SocketServer as socketserver
40
38
import socket
41
39
import argparse
67
65
import types
68
66
import binascii
69
67
import tempfile
70
import itertools
71
import collections
72
68
73
69
import dbus
74
70
import dbus.service
79
75
import ctypes.util
80
76
import xml.dom.minidom
81
77
import inspect
78
import GnuPGInterface
82
79
83
80
try:
84
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
88
85
except ImportError:
89
86
SO_BINDTODEVICE = None
90
87
91
version = "1.6.8"
88
version = "1.4.1"
92
89
stored_state_file = "clients.pickle"
93
90
94
91
logger = logging.getLogger()
95
syslogger = None
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
96
95
97
96
try:
98
97
if_nametoindex = (ctypes.cdll.LoadLibrary
104
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
104
with contextlib.closing(socket.socket()) as s:
106
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(b"16s16x", interface))
108
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]
109
110
return interface_index
110
111
111
112
112
def initlogger(debug, level=logging.WARNING):
113
def initlogger(level=logging.WARNING):
113
114
"""init logger and add loglevel"""
114
115
115
global syslogger
116
syslogger = (logging.handlers.SysLogHandler
117
(facility =
118
logging.handlers.SysLogHandler.LOG_DAEMON,
119
address = "/dev/log"))
120
116
syslogger.setFormatter(logging.Formatter
121
117
('Mandos [%(process)d]: %(levelname)s:'
122
118
' %(message)s'))
123
119
logger.addHandler(syslogger)
124
120
125
if debug:
126
console = logging.StreamHandler()
127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
128
' [%(process)d]:'
129
' %(levelname)s:'
130
' %(message)s'))
131
logger.addHandler(console)
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
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127
logger.setLevel(level)
133
128
134
129
140
135
class PGPEngine(object):
141
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
143
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupgargs = ['--batch',
145
'--home', self.tempdir,
146
'--force-mdc',
147
'--quiet',
148
'--no-use-agent']
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
149
145
150
146
def __enter__(self):
151
147
return self
152
148
153
def __exit__(self, exc_type, exc_value, traceback):
149
def __exit__ (self, exc_type, exc_value, traceback):
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self._cleanup()
155
151
return False
156
152
173
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
175
171
# NUL bytes. So we prefix it and hex encode it.
176
encoded = b"mandos" + binascii.hexlify(password)
177
if len(encoded) > 2048:
178
# GnuPG can't handle long passwords, so encode differently
179
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
180
.replace(b"\n", b"\\n")
181
.replace(b"\0", b"\\x00"))
182
return encoded
172
return b"mandos" + binascii.hexlify(password)
183
173
184
174
def encrypt(self, data, password):
185
passphrase = self.password_encode(password)
186
with tempfile.NamedTemporaryFile(dir=self.tempdir
187
) as passfile:
188
passfile.write(passphrase)
189
passfile.flush()
190
proc = subprocess.Popen(['gpg', '--symmetric',
191
'--passphrase-file',
192
passfile.name]
193
+ self.gnupgargs,
194
stdin = subprocess.PIPE,
195
stdout = subprocess.PIPE,
196
stderr = subprocess.PIPE)
197
ciphertext, err = proc.communicate(input = data)
198
if proc.returncode != 0:
199
raise PGPError(err)
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
200
189
return ciphertext
201
190
202
191
def decrypt(self, data, password):
203
passphrase = self.password_encode(password)
204
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
) as passfile:
206
passfile.write(passphrase)
207
passfile.flush()
208
proc = subprocess.Popen(['gpg', '--decrypt',
209
'--passphrase-file',
210
passfile.name]
211
+ self.gnupgargs,
212
stdin = subprocess.PIPE,
213
stdout = subprocess.PIPE,
214
stderr = subprocess.PIPE)
215
decrypted_plaintext, err = proc.communicate(input
216
= data)
217
if proc.returncode != 0:
218
raise PGPError(err)
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
219
206
return decrypted_plaintext
220
207
221
208
209
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210
class AvahiError(Exception):
223
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def __init__(self, value, *args, **kwargs):
224
212
self.value = value
225
return super(AvahiError, self).__init__(value, *args,
226
**kwargs)
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
227
216
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217
class AvahiServiceError(AvahiError):
229
218
pass
240
229
Used to optionally bind to the specified interface.
241
230
name: string; Example: 'Mandos'
242
231
type: string; Example: '_mandos._tcp'.
243
See <https://www.iana.org/assignments/service-names-port-numbers>
232
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
245
234
TXT: list of strings; TXT record for the service
246
235
domain: string; Domain to publish on, default to .local if empty.
252
241
server: D-Bus Server
253
242
bus: dbus.SystemBus()
254
243
"""
255
256
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
245
servicetype = None, port = None, TXT = None,
258
246
domain = "", host = "", max_renames = 32768,
271
259
self.server = None
272
260
self.bus = bus
273
261
self.entry_group_state_changed_match = None
274
275
262
def rename(self):
276
263
"""Derived from the Avahi example code"""
277
264
if self.rename_count >= self.max_renames:
287
274
try:
288
275
self.add()
289
276
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
277
logger.critical("DBusException: %s", error)
291
278
self.cleanup()
292
279
os._exit(1)
293
280
self.rename_count += 1
294
295
281
def remove(self):
296
282
"""Derived from the Avahi example code"""
297
283
if self.entry_group_state_changed_match is not None:
299
285
self.entry_group_state_changed_match = None
300
286
if self.group is not None:
301
287
self.group.Reset()
302
303
288
def add(self):
304
289
"""Derived from the Avahi example code"""
305
290
self.remove()
322
307
dbus.UInt16(self.port),
323
308
avahi.string_array_to_txt_array(self.TXT))
324
309
self.group.Commit()
325
326
310
def entry_group_state_changed(self, state, error):
327
311
"""Derived from the Avahi example code"""
328
312
logger.debug("Avahi entry group state change: %i", state)
335
319
elif state == avahi.ENTRY_GROUP_FAILURE:
336
320
logger.critical("Avahi: Error in group state changed %s",
337
321
unicode(error))
338
raise AvahiGroupError("State changed: {!s}"
339
.format(error))
340
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
341
324
def cleanup(self):
342
325
"""Derived from the Avahi example code"""
343
326
if self.group is not None:
348
331
pass
349
332
self.group = None
350
333
self.remove()
351
352
334
def server_state_changed(self, state, error=None):
353
335
"""Derived from the Avahi example code"""
354
336
logger.debug("Avahi server state change: %i", state)
373
355
logger.debug("Unknown state: %r", state)
374
356
else:
375
357
logger.debug("Unknown state: %r: %r", state, error)
376
377
358
def activate(self):
378
359
"""Derived from the Avahi example code"""
379
360
if self.server is None:
386
367
self.server_state_changed)
387
368
self.server_state_changed(self.server.GetState())
388
369
389
390
370
class AvahiServiceToSyslog(AvahiService):
391
371
def rename(self):
392
372
"""Add the new name to the syslog messages"""
393
373
ret = AvahiService.rename(self)
394
374
syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
398
378
return ret
399
379
400
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
401
386
class Client(object):
402
387
"""A representation of a client host served by this server.
403
388
428
413
last_checked_ok: datetime.datetime(); (UTC) or None
429
414
last_checker_status: integer between 0 and 255 reflecting exit
430
415
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
416
checker, or None.
432
417
last_enabled: datetime.datetime(); (UTC) or None
433
418
name: string; from the config file, used in log messages and
434
419
D-Bus identifiers
435
420
secret: bytestring; sent verbatim (over TLS) to client
436
421
timeout: datetime.timedelta(); How long from last_checked_ok
437
422
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
423
extended_timeout: extra long timeout when password has been sent
439
424
runtime_expansions: Allowed attributes for runtime expansion.
440
425
expires: datetime.datetime(); time (UTC) when a client will be
441
426
disabled, or None
442
server_settings: The server_settings dict from main()
443
427
"""
444
428
445
429
runtime_expansions = ("approval_delay", "approval_duration",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
449
432
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
453
436
"checker": "fping -q -- %%(host)s",
454
437
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
457
440
"approved_by_default": "True",
458
441
"enabled": "True",
459
442
}
460
443
444
def timeout_milliseconds(self):
445
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
451
452
def interval_milliseconds(self):
453
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
455
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
461
459
@staticmethod
462
460
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
461
""" Construct a new dict of client settings of this form:
464
462
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
463
with exceptions for any special settings as defined above"""
469
464
settings = {}
470
465
for client_name in config.sections():
471
466
section = dict(config.items(client_name))
475
470
# Reformat values from string types to Python types
476
471
client["approved_by_default"] = config.getboolean(
477
472
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
473
client["enabled"] = config.getboolean(client_name, "enabled")
480
474
481
475
client["fingerprint"] = (section["fingerprint"].upper()
482
476
.replace(" ", ""))
488
482
"rb") as secfile:
489
483
client["secret"] = secfile.read()
490
484
else:
491
raise TypeError("No secret or secfile for section {}"
492
.format(section))
485
raise TypeError("No secret or secfile for section %s"
486
% section)
493
487
client["timeout"] = string_to_delta(section["timeout"])
494
488
client["extended_timeout"] = string_to_delta(
495
489
section["extended_timeout"])
501
495
client["checker_command"] = section["checker"]
502
496
client["last_approval_request"] = None
503
497
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
506
507
return settings
507
508
def __init__(self, settings, name = None, server_settings=None):
508
509
510
def __init__(self, settings, name = None):
511
"""Note: the 'checker' key in 'config' sets the
512
'checker_command' attribute and *not* the 'checker'
513
attribute."""
509
514
self.name = name
510
if server_settings is None:
511
server_settings = {}
512
self.server_settings = server_settings
513
515
# adding all client settings
514
for setting, value in settings.items():
516
for setting, value in settings.iteritems():
515
517
setattr(self, setting, value)
516
518
517
if self.enabled:
518
if not hasattr(self, "last_enabled"):
519
self.last_enabled = datetime.datetime.utcnow()
520
if not hasattr(self, "expires"):
521
self.expires = (datetime.datetime.utcnow()
522
+ self.timeout)
523
else:
524
self.last_enabled = None
525
self.expires = None
526
527
519
logger.debug("Creating client %r", self.name)
528
520
# Uppercase and remove spaces from fingerprint for later
529
521
# comparison purposes with return value from the fingerprint()
530
522
# function
531
523
logger.debug(" Fingerprint: %s", self.fingerprint)
532
self.created = settings.get("created",
533
datetime.datetime.utcnow())
534
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
535
526
# attributes specific for this server instance
536
527
self.checker = None
537
528
self.checker_initiator_tag = None
565
556
if getattr(self, "enabled", False):
566
557
# Already enabled
567
558
return
559
self.send_changedstate()
568
560
self.expires = datetime.datetime.utcnow() + self.timeout
569
561
self.enabled = True
570
562
self.last_enabled = datetime.datetime.utcnow()
571
563
self.init_checker()
572
self.send_changedstate()
573
564
574
565
def disable(self, quiet=True):
575
566
"""Disable this client."""
576
567
if not getattr(self, "enabled", False):
577
568
return False
578
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
579
572
logger.info("Disabling client %s", self.name)
580
if getattr(self, "disable_initiator_tag", None) is not None:
573
if getattr(self, "disable_initiator_tag", False):
581
574
gobject.source_remove(self.disable_initiator_tag)
582
575
self.disable_initiator_tag = None
583
576
self.expires = None
584
if getattr(self, "checker_initiator_tag", None) is not None:
577
if getattr(self, "checker_initiator_tag", False):
585
578
gobject.source_remove(self.checker_initiator_tag)
586
579
self.checker_initiator_tag = None
587
580
self.stop_checker()
588
581
self.enabled = False
589
if not quiet:
590
self.send_changedstate()
591
582
# Do not run this again if called by a gobject.timeout_add
592
583
return False
593
584
597
588
def init_checker(self):
598
589
# Schedule a new checker to be started an 'interval' from now,
599
590
# and every interval from then on.
600
if self.checker_initiator_tag is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
591
self.checker_initiator_tag = (gobject.timeout_add
603
(int(self.interval
604
.total_seconds() * 1000),
592
(self.interval_milliseconds(),
605
593
self.start_checker))
606
594
# Schedule a disable() when 'timeout' has passed
607
if self.disable_initiator_tag is not None:
608
gobject.source_remove(self.disable_initiator_tag)
609
595
self.disable_initiator_tag = (gobject.timeout_add
610
(int(self.timeout
611
.total_seconds() * 1000),
612
self.disable))
596
(self.timeout_milliseconds(),
597
self.disable))
613
598
# Also start a new checker *right now*.
614
599
self.start_checker()
615
600
631
616
logger.warning("Checker for %(name)s crashed?",
632
617
vars(self))
633
618
634
def checked_ok(self):
635
"""Assert that the client has been seen, alive and well."""
636
self.last_checked_ok = datetime.datetime.utcnow()
637
self.last_checker_status = 0
638
self.bump_timeout()
639
640
def bump_timeout(self, timeout=None):
641
"""Bump up the timeout for this client."""
619
def checked_ok(self, timeout=None):
620
"""Bump up the timeout for this client.
621
622
This should only be called when the client has been seen,
623
alive and well.
624
"""
642
625
if timeout is None:
643
626
timeout = self.timeout
627
self.last_checked_ok = datetime.datetime.utcnow()
644
628
if self.disable_initiator_tag is not None:
645
629
gobject.source_remove(self.disable_initiator_tag)
646
self.disable_initiator_tag = None
647
630
if getattr(self, "enabled", False):
648
631
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
651
634
self.expires = datetime.datetime.utcnow() + timeout
652
635
653
636
def need_approval(self):
659
642
If a checker already exists, leave it running and do
660
643
nothing."""
661
644
# The reason for not killing a running checker is that if we
662
# did that, and if a checker (for some reason) started running
663
# slowly and taking more than 'interval' time, then the client
664
# would inevitably timeout, since no checker would get a
665
# chance to run to completion. If we instead leave running
645
# did that, then if a checker (for some reason) started
646
# running slowly and taking more than 'interval' time, the
647
# client would inevitably timeout, since no checker would get
648
# a chance to run to completion. If we instead leave running
666
649
# checkers alone, the checker would have to take more time
667
650
# than 'timeout' for the client to be disabled, which is as it
668
651
# should be.
670
653
# If a checker exists, make sure it is not a zombie
671
654
try:
672
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except AttributeError:
674
pass
675
except OSError as error:
676
if error.errno != errno.ECHILD:
677
raise
656
except (AttributeError, OSError) as error:
657
if (isinstance(error, OSError)
658
and error.errno != errno.ECHILD):
659
raise error
678
660
else:
679
661
if pid:
680
662
logger.warning("Checker was a zombie")
683
665
self.current_checker_command)
684
666
# Start a new checker if needed
685
667
if self.checker is None:
686
# Escape attributes for the shell
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
689
attr)))
690
for attr in self.runtime_expansions }
691
668
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s"',
695
self.checker_command, exc_info=error)
696
return True # Try again later
669
# In case checker_command has exactly one % operator
670
command = self.checker_command % self.host
671
except TypeError:
672
# Escape attributes for the shell
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
681
try:
682
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
686
return True # Try again later
697
687
self.current_checker_command = command
698
688
try:
699
689
logger.info("Starting checker %r for %s",
702
692
# in normal mode, that is already done by daemon(),
703
693
# and in debug mode we don't want to. (Stdin is
704
694
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
707
# created wnull.
708
popen_args = {}
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
712
"stderr": wnull })
713
695
self.checker = subprocess.Popen(command,
714
696
close_fds=True,
715
shell=True, cwd="/",
716
**popen_args)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
697
shell=True, cwd="/")
698
self.checker_callback_tag = (gobject.child_watch_add
699
(self.checker.pid,
700
self.checker_callback,
701
data=command))
702
# The checker may have completed before the gobject
703
# watch was added. Check for this.
728
704
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
705
if pid:
706
gobject.source_remove(self.checker_callback_tag)
707
self.checker_callback(pid, status, command)
729
708
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
733
exc_info=error)
734
return True
735
raise
736
if pid:
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
709
logger.error("Failed to start subprocess: %s",
710
error)
739
711
# Re-run this periodically if run by gobject.timeout_add
740
712
return True
741
713
748
720
return
749
721
logger.debug("Stopping checker for %(name)s", vars(self))
750
722
try:
751
self.checker.terminate()
723
os.kill(self.checker.pid, signal.SIGTERM)
752
724
#time.sleep(0.5)
753
725
#if self.checker.poll() is None:
754
# self.checker.kill()
726
# os.kill(self.checker.pid, signal.SIGKILL)
755
727
except OSError as error:
756
728
if error.errno != errno.ESRCH: # No such process
757
729
raise
774
746
# "Set" method, so we fail early here:
775
747
if byte_arrays and signature != "ay":
776
748
raise ValueError("Byte arrays not supported for non-'ay'"
777
" signature {!r}".format(signature))
749
" signature %r" % signature)
778
750
def decorator(func):
779
751
func._dbus_is_property = True
780
752
func._dbus_interface = dbus_interface
788
760
return decorator
789
761
790
762
791
def dbus_interface_annotations(dbus_interface):
792
"""Decorator for marking functions returning interface annotations
793
794
Usage:
795
796
@dbus_interface_annotations("org.example.Interface")
797
def _foo(self): # Function name does not matter
798
return {"org.freedesktop.DBus.Deprecated": "true",
799
"org.freedesktop.DBus.Property.EmitsChangedSignal":
800
"false"}
801
"""
802
def decorator(func):
803
func._dbus_is_interface = True
804
func._dbus_interface = dbus_interface
805
func._dbus_name = dbus_interface
806
return func
807
return decorator
808
809
810
def dbus_annotations(annotations):
811
"""Decorator to annotate D-Bus methods, signals or properties
812
Usage:
813
814
@dbus_service_property("org.example.Interface", signature="b",
815
access="r")
816
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
def Property_dbus_property(self):
820
return dbus.Boolean(False)
821
"""
822
def decorator(func):
823
func._dbus_annotations = annotations
824
return func
825
return decorator
826
827
828
763
class DBusPropertyException(dbus.exceptions.DBusException):
829
764
"""A base class for D-Bus property-related exceptions
830
765
"""
831
pass
766
def __unicode__(self):
767
return unicode(str(self))
768
832
769
833
770
class DBusPropertyAccessException(DBusPropertyException):
834
771
"""A property's access permissions disallows an operation.
851
788
"""
852
789
853
790
@staticmethod
854
def _is_dbus_thing(thing):
855
"""Returns a function testing if an attribute is a D-Bus thing
856
857
If called like _is_dbus_thing("method") it returns a function
858
suitable for use as predicate to inspect.getmembers().
859
"""
860
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
861
False)
791
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
862
793
863
def _get_all_dbus_things(self, thing):
794
def _get_all_dbus_properties(self):
864
795
"""Returns a generator of (name, attribute) pairs
865
796
"""
866
return ((getattr(athing.__get__(self), "_dbus_name",
867
name),
868
athing.__get__(self))
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
869
798
for cls in self.__class__.__mro__
870
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
799
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
873
801
874
802
def _get_dbus_property(self, interface_name, property_name):
875
803
"""Returns a bound method if one exists which is a D-Bus
877
805
"""
878
806
for cls in self.__class__.__mro__:
879
807
for name, value in (inspect.getmembers
880
(cls,
881
self._is_dbus_thing("property"))):
808
(cls, self._is_dbus_property)):
882
809
if (value._dbus_name == property_name
883
810
and value._dbus_interface == interface_name):
884
811
return value.__get__(self)
912
839
# The byte_arrays option is not supported yet on
913
840
# signatures other than "ay".
914
841
if prop._dbus_signature != "ay":
915
raise ValueError("Byte arrays not supported for non-"
916
"'ay' signature {!r}"
917
.format(prop._dbus_signature))
918
value = dbus.ByteArray(b''.join(chr(byte)
919
for byte in value))
842
raise ValueError
843
value = dbus.ByteArray(''.join(unichr(byte)
844
for byte in value))
920
845
prop(value)
921
846
922
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
928
853
Note: Will not include properties with access="write".
929
854
"""
930
855
properties = {}
931
for name, prop in self._get_all_dbus_things("property"):
856
for name, prop in self._get_all_dbus_properties():
932
857
if (interface_name
933
858
and interface_name != prop._dbus_interface):
934
859
# Interface non-empty but did not match
949
874
path_keyword='object_path',
950
875
connection_keyword='connection')
951
876
def Introspect(self, object_path, connection):
952
"""Overloading of standard D-Bus method.
953
954
Inserts property tags and interface annotation tags.
877
"""Standard D-Bus method, overloaded to insert property tags.
955
878
"""
956
879
xmlstring = dbus.service.Object.Introspect(self, object_path,
957
880
connection)
964
887
e.setAttribute("access", prop._dbus_access)
965
888
return e
966
889
for if_tag in document.getElementsByTagName("interface"):
967
# Add property tags
968
890
for tag in (make_tag(document, name, prop)
969
891
for name, prop
970
in self._get_all_dbus_things("property")
892
in self._get_all_dbus_properties()
971
893
if prop._dbus_interface
972
894
== if_tag.getAttribute("name")):
973
895
if_tag.appendChild(tag)
974
# Add annotation tags
975
for typ in ("method", "signal", "property"):
976
for tag in if_tag.getElementsByTagName(typ):
977
annots = dict()
978
for name, prop in (self.
979
_get_all_dbus_things(typ)):
980
if (name == tag.getAttribute("name")
981
and prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
annots.update(getattr
984
(prop,
985
"_dbus_annotations",
986
{}))
987
for name, value in annots.items():
988
ann_tag = document.createElement(
989
"annotation")
990
ann_tag.setAttribute("name", name)
991
ann_tag.setAttribute("value", value)
992
tag.appendChild(ann_tag)
993
# Add interface annotation tags
994
for annotation, value in dict(
995
itertools.chain.from_iterable(
996
annotations().items()
997
for name, annotations in
998
self._get_all_dbus_things("interface")
999
if name == if_tag.getAttribute("name")
1000
)).items():
1001
ann_tag = document.createElement("annotation")
1002
ann_tag.setAttribute("name", annotation)
1003
ann_tag.setAttribute("value", value)
1004
if_tag.appendChild(ann_tag)
1005
896
# Add the names to the return values for the
1006
897
# "org.freedesktop.DBus.Properties" methods
1007
898
if (if_tag.getAttribute("name")
1022
913
except (AttributeError, xml.dom.DOMException,
1023
914
xml.parsers.expat.ExpatError) as error:
1024
915
logger.error("Failed to override Introspection method",
1025
exc_info=error)
916
error)
1026
917
return xmlstring
1027
918
1028
919
1029
def datetime_to_dbus(dt, variant_level=0):
920
def datetime_to_dbus (dt, variant_level=0):
1030
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1031
922
if dt is None:
1032
923
return dbus.String("", variant_level = variant_level)
1034
925
variant_level=variant_level)
1035
926
1036
927
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1038
"""A class decorator; applied to a subclass of
1039
dbus.service.Object, it will add alternate D-Bus attributes with
1040
interface names according to the "alt_interface_names" mapping.
1041
Usage:
1042
1043
@alternate_dbus_interfaces({"org.example.Interface":
1044
"net.example.AlternateInterface"})
1045
class SampleDBusObject(dbus.service.Object):
1046
@dbus.service.method("org.example.Interface")
1047
def SampleDBusMethod():
1048
pass
1049
1050
The above "SampleDBusMethod" on "SampleDBusObject" will be
1051
reachable via two interfaces: "org.example.Interface" and
1052
"net.example.AlternateInterface", the latter of which will have
1053
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1054
"true", unless "deprecate" is passed with a False value.
1055
1056
This works for methods and signals, and also for D-Bus properties
1057
(from DBusObjectWithProperties) and interfaces (from the
1058
dbus_interface_annotations decorator).
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
1059
932
"""
1060
def wrapper(cls):
1061
for orig_interface_name, alt_interface_name in (
1062
alt_interface_names.items()):
1063
attr = {}
1064
interface_names = set()
1065
# Go though all attributes of the class
1066
for attrname, attribute in inspect.getmembers(cls):
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
1067
940
# Ignore non-D-Bus attributes, and D-Bus attributes
1068
941
# with the wrong interface name
1069
942
if (not hasattr(attribute, "_dbus_interface")
1070
943
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
944
.startswith("se.recompile.Mandos")):
1072
945
continue
1073
946
# Create an alternate D-Bus interface name based on
1074
947
# the current name
1075
948
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1078
interface_names.add(alt_interface)
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
1079
951
# Is this a D-Bus signal?
1080
952
if getattr(attribute, "_dbus_is_signal", False):
1081
# Extract the original non-method undecorated
1082
# function by black magic
953
# Extract the original non-method function by
954
# black magic
1083
955
nonmethod_func = (dict(
1084
956
zip(attribute.func_code.co_freevars,
1085
957
attribute.__closure__))["func"]
1096
968
nonmethod_func.func_name,
1097
969
nonmethod_func.func_defaults,
1098
970
nonmethod_func.func_closure)))
1099
# Copy annotations, if any
1100
try:
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1103
except AttributeError:
1104
pass
1105
971
# Define a creator of a function to call both the
1106
# original and alternate functions, so both the
1107
# original and alternate signals gets sent when
1108
# the function is called
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
1109
974
def fixscope(func1, func2):
1110
975
"""This function is a scope container to pass
1111
976
func1 and func2 to the "call_both" function
1118
983
return call_both
1119
984
# Create the "call_both" function and add it to
1120
985
# the class
1121
attr[attrname] = fixscope(attribute, new_function)
986
attr[attrname] = fixscope(attribute,
987
new_function)
1122
988
# Is this a D-Bus method?
1123
989
elif getattr(attribute, "_dbus_is_method", False):
1124
990
# Create a new, but exactly alike, function
1135
1001
attribute.func_name,
1136
1002
attribute.func_defaults,
1137
1003
attribute.func_closure)))
1138
# Copy annotations, if any
1139
try:
1140
attr[attrname]._dbus_annotations = (
1141
dict(attribute._dbus_annotations))
1142
except AttributeError:
1143
pass
1144
1004
# Is this a D-Bus property?
1145
1005
elif getattr(attribute, "_dbus_is_property", False):
1146
1006
# Create a new, but exactly alike, function
1160
1020
attribute.func_name,
1161
1021
attribute.func_defaults,
1162
1022
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
1169
# Is this a D-Bus interface?
1170
elif getattr(attribute, "_dbus_is_interface", False):
1171
# Create a new, but exactly alike, function
1172
# object. Decorate it to be a new D-Bus interface
1173
# with the alternate D-Bus interface name. Add it
1174
# to the class.
1175
attr[attrname] = (dbus_interface_annotations
1176
(alt_interface)
1177
(types.FunctionType
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
if deprecate:
1184
# Deprecate all alternate interfaces
1185
iname="_AlternateDBusNames_interface_annotation{}"
1186
for interface_name in interface_names:
1187
@dbus_interface_annotations(interface_name)
1188
def func(self):
1189
return { "org.freedesktop.DBus.Deprecated":
1190
"true" }
1191
# Find an unused name
1192
for aname in (iname.format(i)
1193
for i in itertools.count()):
1194
if aname not in attr:
1195
attr[aname] = func
1196
break
1197
if interface_names:
1198
# Replace the class with a new subclass of it with
1199
# methods, signals, etc. as created above.
1200
cls = type(b"{}Alternate".format(cls.__name__),
1201
(cls,), attr)
1202
return cls
1203
return wrapper
1204
1205
1206
@alternate_dbus_interfaces({"se.recompile.Mandos":
1207
"se.bsnet.fukt.Mandos"})
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1208
1026
class ClientDBus(Client, DBusObjectWithProperties):
1209
1027
"""A Client class using D-Bus
1210
1028
1221
1039
def __init__(self, bus = None, *args, **kwargs):
1222
1040
self.bus = bus
1223
1041
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
1224
1045
# Only now, when this client is initialized, can it show up on
1225
1046
# the D-Bus
1226
1047
client_object_name = unicode(self.name).translate(
1230
1051
("/clients/" + client_object_name))
1231
1052
DBusObjectWithProperties.__init__(self, self.bus,
1232
1053
self.dbus_object_path)
1233
1054
1234
1055
def notifychangeproperty(transform_func,
1235
1056
dbus_name, type_func=lambda x: x,
1236
1057
variant_level=1):
1244
1065
to the D-Bus. Default: no transform
1245
1066
variant_level: D-Bus variant level. Default: 1
1246
1067
"""
1247
attrname = "_{}".format(dbus_name)
1068
attrname = "_{0}".format(dbus_name)
1248
1069
def setter(self, value):
1249
1070
if hasattr(self, "dbus_object_path"):
1250
1071
if (not hasattr(self, attrname) or
1259
1080
1260
1081
return property(lambda self: getattr(self, attrname), setter)
1261
1082
1083
1262
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1263
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1264
1086
"ApprovalPending",
1271
1093
checker is not None)
1272
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1273
1095
"LastCheckedOK")
1274
last_checker_status = notifychangeproperty(dbus.Int16,
1275
"LastCheckerStatus")
1276
1096
last_approval_request = notifychangeproperty(
1277
1097
datetime_to_dbus, "LastApprovalRequest")
1278
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1280
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1281
1101
"ApprovalDelay",
1282
1102
type_func =
1283
lambda td: td.total_seconds()
1284
* 1000)
1103
timedelta_to_milliseconds)
1285
1104
approval_duration = notifychangeproperty(
1286
1105
dbus.UInt64, "ApprovalDuration",
1287
type_func = lambda td: td.total_seconds() * 1000)
1106
type_func = timedelta_to_milliseconds)
1288
1107
host = notifychangeproperty(dbus.String, "Host")
1289
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1290
type_func = lambda td:
1291
td.total_seconds() * 1000)
1109
type_func =
1110
timedelta_to_milliseconds)
1292
1111
extended_timeout = notifychangeproperty(
1293
1112
dbus.UInt64, "ExtendedTimeout",
1294
type_func = lambda td: td.total_seconds() * 1000)
1113
type_func = timedelta_to_milliseconds)
1295
1114
interval = notifychangeproperty(dbus.UInt64,
1296
1115
"Interval",
1297
1116
type_func =
1298
lambda td: td.total_seconds()
1299
* 1000)
1117
timedelta_to_milliseconds)
1300
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1301
1119
1302
1120
del notifychangeproperty
1330
1148
*args, **kwargs)
1331
1149
1332
1150
def start_checker(self, *args, **kwargs):
1333
old_checker_pid = getattr(self.checker, "pid", None)
1151
old_checker = self.checker
1152
if self.checker is not None:
1153
old_checker_pid = self.checker.pid
1154
else:
1155
old_checker_pid = None
1334
1156
r = Client.start_checker(self, *args, **kwargs)
1335
1157
# Only if new checker process was started
1336
1158
if (self.checker is not None
1344
1166
return False
1345
1167
1346
1168
def approve(self, value=True):
1169
self.send_changedstate()
1347
1170
self.approved = value
1348
gobject.timeout_add(int(self.approval_duration.total_seconds()
1349
* 1000), self._reset_approved)
1350
self.send_changedstate()
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1351
1175
1352
1176
## D-Bus methods, signals & properties
1353
1177
_interface = "se.recompile.Mandos.Client"
1354
1178
1355
## Interfaces
1356
1357
@dbus_interface_annotations(_interface)
1358
def _foo(self):
1359
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1360
"false"}
1361
1362
1179
## Signals
1363
1180
1364
1181
# CheckerCompleted - signal
1400
1217
"D-Bus signal"
1401
1218
return self.need_approval()
1402
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1403
1228
## Methods
1404
1229
1405
1230
# Approve - method
1455
1280
access="readwrite")
1456
1281
def ApprovalDelay_dbus_property(self, value=None):
1457
1282
if value is None: # get
1458
return dbus.UInt64(self.approval_delay.total_seconds()
1459
* 1000)
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1460
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1461
1285
1462
1286
# ApprovalDuration - property
1464
1288
access="readwrite")
1465
1289
def ApprovalDuration_dbus_property(self, value=None):
1466
1290
if value is None: # get
1467
return dbus.UInt64(self.approval_duration.total_seconds()
1468
* 1000)
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1469
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1470
1294
1471
1295
# Name - property
1516
1340
return
1517
1341
return datetime_to_dbus(self.last_checked_ok)
1518
1342
1519
# LastCheckerStatus - property
1520
@dbus_service_property(_interface, signature="n",
1521
access="read")
1522
def LastCheckerStatus_dbus_property(self):
1523
return dbus.Int16(self.last_checker_status)
1524
1525
1343
# Expires - property
1526
1344
@dbus_service_property(_interface, signature="s", access="read")
1527
1345
def Expires_dbus_property(self):
1537
1355
access="readwrite")
1538
1356
def Timeout_dbus_property(self, value=None):
1539
1357
if value is None: # get
1540
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1541
old_timeout = self.timeout
1358
return dbus.UInt64(self.timeout_milliseconds())
1542
1359
self.timeout = datetime.timedelta(0, 0, 0, value)
1543
# Reschedule disabling
1544
if self.enabled:
1545
now = datetime.datetime.utcnow()
1546
self.expires += self.timeout - old_timeout
1547
if self.expires <= now:
1548
# The timeout has passed
1549
self.disable()
1550
else:
1551
if (getattr(self, "disable_initiator_tag", None)
1552
is None):
1553
return
1554
gobject.source_remove(self.disable_initiator_tag)
1555
self.disable_initiator_tag = (
1556
gobject.timeout_add(
1557
int((self.expires - now).total_seconds()
1558
* 1000), self.disable))
1360
if getattr(self, "disable_initiator_tag", None) is None:
1361
return
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
1371
if time_to_die <= 0:
1372
# The timeout has passed
1373
self.disable()
1374
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
1559
1380
1560
1381
# ExtendedTimeout - property
1561
1382
@dbus_service_property(_interface, signature="t",
1562
1383
access="readwrite")
1563
1384
def ExtendedTimeout_dbus_property(self, value=None):
1564
1385
if value is None: # get
1565
return dbus.UInt64(self.extended_timeout.total_seconds()
1566
* 1000)
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1567
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1568
1388
1569
1389
# Interval - property
1571
1391
access="readwrite")
1572
1392
def Interval_dbus_property(self, value=None):
1573
1393
if value is None: # get
1574
return dbus.UInt64(self.interval.total_seconds() * 1000)
1394
return dbus.UInt64(self.interval_milliseconds())
1575
1395
self.interval = datetime.timedelta(0, 0, 0, value)
1576
1396
if getattr(self, "checker_initiator_tag", None) is None:
1577
1397
return
1610
1430
@dbus_service_property(_interface, signature="ay",
1611
1431
access="write", byte_arrays=True)
1612
1432
def Secret_dbus_property(self, value):
1613
self.secret = bytes(value)
1433
self.secret = str(value)
1614
1434
1615
1435
del _interface
1616
1436
1641
1461
self._pipe.send(('setattr', name, value))
1642
1462
1643
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
1644
1468
class ClientHandler(socketserver.BaseRequestHandler, object):
1645
1469
"""A class to handle client connections.
1646
1470
1682
1506
logger.debug("Protocol version: %r", line)
1683
1507
try:
1684
1508
if int(line.strip().split()[0]) > 1:
1685
raise RuntimeError(line)
1509
raise RuntimeError
1686
1510
except (ValueError, IndexError, RuntimeError) as error:
1687
1511
logger.error("Unknown protocol version: %s", error)
1688
1512
return
1714
1538
except KeyError:
1715
1539
return
1716
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1717
1545
if client.approval_delay:
1718
1546
delay = client.approval_delay
1719
1547
client.approvals_pending += 1
1737
1565
if self.server.use_dbus:
1738
1566
# Emit D-Bus signal
1739
1567
client.NeedApproval(
1740
client.approval_delay.total_seconds()
1741
* 1000, client.approved_by_default)
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1742
1570
else:
1743
1571
logger.warning("Client %s was not approved",
1744
1572
client.name)
1750
1578
#wait until timeout or approved
1751
1579
time = datetime.datetime.now()
1752
1580
client.changedstate.acquire()
1753
client.changedstate.wait(delay.total_seconds())
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1754
1584
client.changedstate.release()
1755
1585
time2 = datetime.datetime.now()
1756
1586
if (time2 - time) >= delay:
1772
1602
try:
1773
1603
sent = session.send(client.secret[sent_size:])
1774
1604
except gnutls.errors.GNUTLSError as error:
1775
logger.warning("gnutls send failed",
1776
exc_info=error)
1605
logger.warning("gnutls send failed")
1777
1606
return
1778
1607
logger.debug("Sent: %d, remaining: %d",
1779
1608
sent, len(client.secret)
1782
1611
1783
1612
logger.info("Sending secret to %s", client.name)
1784
1613
# bump the timeout using extended_timeout
1785
client.bump_timeout(client.extended_timeout)
1614
client.checked_ok(client.extended_timeout)
1786
1615
if self.server.use_dbus:
1787
1616
# Emit D-Bus signal
1788
1617
client.GotSecret()
1793
1622
try:
1794
1623
session.bye()
1795
1624
except gnutls.errors.GNUTLSError as error:
1796
logger.warning("GnuTLS bye failed",
1797
exc_info=error)
1625
logger.warning("GnuTLS bye failed")
1798
1626
1799
1627
@staticmethod
1800
1628
def peer_certificate(session):
1872
1700
def process_request(self, request, address):
1873
1701
"""Start a new process to process the request."""
1874
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1875
args = (request, address))
1703
args = (request,
1704
address))
1876
1705
proc.start()
1877
1706
return proc
1878
1707
1893
1722
1894
1723
def add_pipe(self, parent_pipe, proc):
1895
1724
"""Dummy function; override as necessary"""
1896
raise NotImplementedError()
1725
raise NotImplementedError
1897
1726
1898
1727
1899
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1906
1735
use_ipv6: Boolean; to use IPv6 or not
1907
1736
"""
1908
1737
def __init__(self, server_address, RequestHandlerClass,
1909
interface=None, use_ipv6=True, socketfd=None):
1910
"""If socketfd is set, use that file descriptor instead of
1911
creating a new one with socket.socket().
1912
"""
1738
interface=None, use_ipv6=True):
1913
1739
self.interface = interface
1914
1740
if use_ipv6:
1915
1741
self.address_family = socket.AF_INET6
1916
if socketfd is not None:
1917
# Save the file descriptor
1918
self.socketfd = socketfd
1919
# Save the original socket.socket() function
1920
self.socket_socket = socket.socket
1921
# To implement --socket, we monkey patch socket.socket.
1922
#
1923
# (When socketserver.TCPServer is a new-style class, we
1924
# could make self.socket into a property instead of monkey
1925
# patching socket.socket.)
1926
#
1927
# Create a one-time-only replacement for socket.socket()
1928
@functools.wraps(socket.socket)
1929
def socket_wrapper(*args, **kwargs):
1930
# Restore original function so subsequent calls are
1931
# not affected.
1932
socket.socket = self.socket_socket
1933
del self.socket_socket
1934
# This time only, return a new socket object from the
1935
# saved file descriptor.
1936
return socket.fromfd(self.socketfd, *args, **kwargs)
1937
# Replace socket.socket() function with wrapper
1938
socket.socket = socket_wrapper
1939
# The socketserver.TCPServer.__init__ will call
1940
# socket.socket(), which might be our replacement,
1941
# socket_wrapper(), if socketfd was set.
1942
1742
socketserver.TCPServer.__init__(self, server_address,
1943
1743
RequestHandlerClass)
1944
1945
1744
def server_bind(self):
1946
1745
"""This overrides the normal server_bind() function
1947
1746
to bind to an interface if one was specified, and also NOT to
1955
1754
try:
1956
1755
self.socket.setsockopt(socket.SOL_SOCKET,
1957
1756
SO_BINDTODEVICE,
1958
(self.interface + "\0")
1959
.encode("utf-8"))
1757
str(self.interface
1758
+ '\0'))
1960
1759
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1760
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1763
self.interface)
1764
elif error[0] == errno.ENOPROTOOPT:
1965
1765
logger.error("SO_BINDTODEVICE not available;"
1966
1766
" cannot bind to interface %s",
1967
1767
self.interface)
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
1971
1768
else:
1972
1769
raise
1973
1770
# Only bind(2) the socket if we really need to.
1976
1773
if self.address_family == socket.AF_INET6:
1977
1774
any_address = "::" # in6addr_any
1978
1775
else:
1979
any_address = "0.0.0.0" # INADDR_ANY
1776
any_address = socket.INADDR_ANY
1980
1777
self.server_address = (any_address,
1981
1778
self.server_address[1])
1982
1779
elif not self.server_address[1]:
2003
1800
"""
2004
1801
def __init__(self, server_address, RequestHandlerClass,
2005
1802
interface=None, use_ipv6=True, clients=None,
2006
gnutls_priority=None, use_dbus=True, socketfd=None):
1803
gnutls_priority=None, use_dbus=True):
2007
1804
self.enabled = False
2008
1805
self.clients = clients
2009
1806
if self.clients is None:
2013
1810
IPv6_TCPServer.__init__(self, server_address,
2014
1811
RequestHandlerClass,
2015
1812
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
1813
use_ipv6 = use_ipv6)
2018
1814
def server_activate(self):
2019
1815
if self.enabled:
2020
1816
return socketserver.TCPServer.server_activate(self)
2033
1829
2034
1830
def handle_ipc(self, source, condition, parent_pipe=None,
2035
1831
proc = None, client_object=None):
1832
condition_names = {
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1835
# blocking).
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1839
# broken, usually for pipes and
1840
# sockets).
1841
}
1842
conditions_string = ' | '.join(name
1843
for cond, name in
1844
condition_names.iteritems()
1845
if cond & condition)
2036
1846
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2038
1848
# Wait for other process to exit
2039
1849
proc.join()
2040
1850
return False
2098
1908
return True
2099
1909
2100
1910
2101
def rfc3339_duration_to_delta(duration):
2102
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2103
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2118
"""
2119
2120
# Parsing an RFC 3339 duration with regular expressions is not
2121
# possible - there would have to be multiple places for the same
2122
# values, like seconds. The current code, while more esoteric, is
2123
# cleaner without depending on a parsing library. If Python had a
2124
# built-in library for parsing we would use it, but we'd like to
2125
# avoid excessive use of external libraries.
2126
2127
# New type for defining tokens, syntax, and semantics all-in-one
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2132
# containing digits
2133
"value", # datetime.timedelta or
2134
# None
2135
"followers")) # Tokens valid after
2136
# this token
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2140
token_second = Token(re.compile(r"(\d+)S"),
2141
datetime.timedelta(seconds=1),
2142
frozenset((token_end,)))
2143
token_minute = Token(re.compile(r"(\d+)M"),
2144
datetime.timedelta(minutes=1),
2145
frozenset((token_second, token_end)))
2146
token_hour = Token(re.compile(r"(\d+)H"),
2147
datetime.timedelta(hours=1),
2148
frozenset((token_minute, token_end)))
2149
token_time = Token(re.compile(r"T"),
2150
None,
2151
frozenset((token_hour, token_minute,
2152
token_second)))
2153
token_day = Token(re.compile(r"(\d+)D"),
2154
datetime.timedelta(days=1),
2155
frozenset((token_time, token_end)))
2156
token_month = Token(re.compile(r"(\d+)M"),
2157
datetime.timedelta(weeks=4),
2158
frozenset((token_day, token_end)))
2159
token_year = Token(re.compile(r"(\d+)Y"),
2160
datetime.timedelta(weeks=52),
2161
frozenset((token_month, token_end)))
2162
token_week = Token(re.compile(r"(\d+)W"),
2163
datetime.timedelta(weeks=1),
2164
frozenset((token_end,)))
2165
token_duration = Token(re.compile(r"P"), None,
2166
frozenset((token_year, token_month,
2167
token_day, token_time,
2168
token_week)))
2169
# Define starting values
2170
value = datetime.timedelta() # Value so far
2171
found_token = None
2172
followers = frozenset((token_duration,)) # Following valid tokens
2173
s = duration # String left to parse
2174
# Loop until end token is found
2175
while found_token is not token_end:
2176
# Search for any currently valid tokens
2177
for token in followers:
2178
match = token.regexp.match(s)
2179
if match is not None:
2180
# Token found
2181
if token.value is not None:
2182
# Value found, parse digits
2183
factor = int(match.group(1), 10)
2184
# Add to value so far
2185
value += factor * token.value
2186
# Strip token from string
2187
s = token.regexp.sub("", s, 1)
2188
# Go to found token
2189
found_token = token
2190
# Set valid next tokens
2191
followers = found_token.followers
2192
break
2193
else:
2194
# No currently valid tokens were found
2195
raise ValueError("Invalid RFC 3339 duration")
2196
# End token found
2197
return value
2198
2199
2200
1911
def string_to_delta(interval):
2201
1912
"""Parse a string and return a datetime.timedelta
2202
1913
2213
1924
>>> string_to_delta('5m 30s')
2214
1925
datetime.timedelta(0, 330)
2215
1926
"""
2216
2217
try:
2218
return rfc3339_duration_to_delta(interval)
2219
except ValueError:
2220
pass
2221
2222
1927
timevalue = datetime.timedelta(0)
2223
1928
for s in interval.split():
2224
1929
try:
2225
suffix = s[-1]
1930
suffix = unicode(s[-1])
2226
1931
value = int(s[:-1])
2227
1932
if suffix == "d":
2228
1933
delta = datetime.timedelta(value)
2235
1940
elif suffix == "w":
2236
1941
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2237
1942
else:
2238
raise ValueError("Unknown suffix {!r}"
2239
.format(suffix))
2240
except IndexError as e:
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
2241
1945
raise ValueError(*(e.args))
2242
1946
timevalue += delta
2243
1947
return timevalue
2256
1960
sys.exit()
2257
1961
if not noclose:
2258
1962
# Close all standard open file descriptors
2259
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1963
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2260
1964
if not stat.S_ISCHR(os.fstat(null).st_mode):
2261
raise OSError(errno.ENODEV, "{} not a character device"
2262
.format(os.devnull))
1965
raise OSError(errno.ENODEV,
1966
"%s not a character device"
1967
% os.path.devnull)
2263
1968
os.dup2(null, sys.stdin.fileno())
2264
1969
os.dup2(null, sys.stdout.fileno())
2265
1970
os.dup2(null, sys.stderr.fileno())
2274
1979
2275
1980
parser = argparse.ArgumentParser()
2276
1981
parser.add_argument("-v", "--version", action="version",
2277
version = "%(prog)s {}".format(version),
1982
version = "%%(prog)s %s" % version,
2278
1983
help="show version number and exit")
2279
1984
parser.add_argument("-i", "--interface", metavar="IF",
2280
1985
help="Bind to interface IF")
2286
1991
help="Run self-test")
2287
1992
parser.add_argument("--debug", action="store_true",
2288
1993
help="Debug mode; run in foreground and log"
2289
" to terminal", default=None)
1994
" to terminal")
2290
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
2291
1996
help="Debug level for stdout output")
2292
1997
parser.add_argument("--priority", help="GnuTLS"
2299
2004
" files")
2300
2005
parser.add_argument("--no-dbus", action="store_false",
2301
2006
dest="use_dbus", help="Do not provide D-Bus"
2302
" system bus interface", default=None)
2007
" system bus interface")
2303
2008
parser.add_argument("--no-ipv6", action="store_false",
2304
dest="use_ipv6", help="Do not use IPv6",
2305
default=None)
2009
dest="use_ipv6", help="Do not use IPv6")
2306
2010
parser.add_argument("--no-restore", action="store_false",
2307
2011
dest="restore", help="Do not restore stored"
2308
" state", default=None)
2309
parser.add_argument("--socket", type=int,
2310
help="Specify a file descriptor to a network"
2311
" socket to use instead of creating one")
2012
" state")
2312
2013
parser.add_argument("--statedir", metavar="DIR",
2313
2014
help="Directory to save/restore state in")
2314
parser.add_argument("--foreground", action="store_true",
2315
help="Run in foreground", default=None)
2316
parser.add_argument("--no-zeroconf", action="store_false",
2317
dest="zeroconf", help="Do not use Zeroconf",
2318
default=None)
2319
2015
2320
2016
options = parser.parse_args()
2321
2017
2322
2018
if options.check:
2323
2019
import doctest
2324
fail_count, test_count = doctest.testmod()
2325
sys.exit(os.EX_OK if fail_count == 0 else 1)
2020
doctest.testmod()
2021
sys.exit()
2326
2022
2327
2023
# Default values for config file for server-global settings
2328
2024
server_defaults = { "interface": "",
2330
2026
"port": "",
2331
2027
"debug": "False",
2332
2028
"priority":
2333
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2334
2030
"servicename": "Mandos",
2335
2031
"use_dbus": "True",
2336
2032
"use_ipv6": "True",
2337
2033
"debuglevel": "",
2338
2034
"restore": "True",
2339
"socket": "",
2340
"statedir": "/var/lib/mandos",
2341
"foreground": "False",
2342
"zeroconf": "True",
2035
"statedir": "/var/lib/mandos"
2343
2036
}
2344
2037
2345
2038
# Parse config file for server-global settings
2350
2043
# Convert the SafeConfigParser object to a dict
2351
2044
server_settings = server_config.defaults()
2352
2045
# Use the appropriate methods on the non-string config options
2353
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2354
2047
server_settings[option] = server_config.getboolean("DEFAULT",
2355
2048
option)
2356
2049
if server_settings["port"]:
2357
2050
server_settings["port"] = server_config.getint("DEFAULT",
2358
2051
"port")
2359
if server_settings["socket"]:
2360
server_settings["socket"] = server_config.getint("DEFAULT",
2361
"socket")
2362
# Later, stdin will, and stdout and stderr might, be dup'ed
2363
# over with an opened os.devnull. But we don't want this to
2364
# happen with a supplied network socket.
2365
if 0 <= server_settings["socket"] <= 2:
2366
server_settings["socket"] = os.dup(server_settings
2367
["socket"])
2368
2052
del server_config
2369
2053
2370
2054
# Override the settings from the config file with command line
2372
2056
for option in ("interface", "address", "port", "debug",
2373
2057
"priority", "servicename", "configdir",
2374
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2375
"statedir", "socket", "foreground", "zeroconf"):
2059
"statedir"):
2376
2060
value = getattr(options, option)
2377
2061
if value is not None:
2378
2062
server_settings[option] = value
2379
2063
del options
2380
2064
# Force all strings to be unicode
2381
2065
for option in server_settings.keys():
2382
if isinstance(server_settings[option], bytes):
2383
server_settings[option] = (server_settings[option]
2384
.decode("utf-8"))
2385
# Force all boolean options to be boolean
2386
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2387
"foreground", "zeroconf"):
2388
server_settings[option] = bool(server_settings[option])
2389
# Debug implies foreground
2390
if server_settings["debug"]:
2391
server_settings["foreground"] = True
2066
if type(server_settings[option]) is str:
2067
server_settings[option] = unicode(server_settings[option])
2392
2068
# Now we have our good server settings in "server_settings"
2393
2069
2394
2070
##################################################################
2395
2071
2396
if (not server_settings["zeroconf"] and
2397
not (server_settings["port"]
2398
or server_settings["socket"] != "")):
2399
parser.error("Needs port or socket to work without"
2400
" Zeroconf")
2401
2402
2072
# For convenience
2403
2073
debug = server_settings["debug"]
2404
2074
debuglevel = server_settings["debuglevel"]
2406
2076
use_ipv6 = server_settings["use_ipv6"]
2407
2077
stored_state_path = os.path.join(server_settings["statedir"],
2408
2078
stored_state_file)
2409
foreground = server_settings["foreground"]
2410
zeroconf = server_settings["zeroconf"]
2411
2079
2412
2080
if debug:
2413
initlogger(debug, logging.DEBUG)
2081
initlogger(logging.DEBUG)
2414
2082
else:
2415
2083
if not debuglevel:
2416
initlogger(debug)
2084
initlogger()
2417
2085
else:
2418
2086
level = getattr(logging, debuglevel.upper())
2419
initlogger(debug, level)
2087
initlogger(level)
2420
2088
2421
2089
if server_settings["servicename"] != "Mandos":
2422
2090
syslogger.setFormatter(logging.Formatter
2423
('Mandos ({}) [%(process)d]:'
2424
' %(levelname)s: %(message)s'
2425
.format(server_settings
2426
["servicename"])))
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
2427
2094
2428
2095
# Parse config file with clients
2429
client_config = configparser.SafeConfigParser(Client
2430
.client_defaults)
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2431
2097
client_config.read(os.path.join(server_settings["configdir"],
2432
2098
"clients.conf"))
2433
2099
2434
2100
global mandos_dbus_service
2435
2101
mandos_dbus_service = None
2436
2102
2437
socketfd = None
2438
if server_settings["socket"] != "":
2439
socketfd = server_settings["socket"]
2440
2103
tcp_server = MandosServer((server_settings["address"],
2441
2104
server_settings["port"]),
2442
2105
ClientHandler,
2445
2108
use_ipv6=use_ipv6,
2446
2109
gnutls_priority=
2447
2110
server_settings["priority"],
2448
use_dbus=use_dbus,
2449
socketfd=socketfd)
2450
if not foreground:
2451
pidfilename = "/run/mandos.pid"
2452
if not os.path.isdir("/run/."):
2453
pidfilename = "/var/run/mandos.pid"
2454
pidfile = None
2111
use_dbus=use_dbus)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2455
2114
try:
2456
2115
pidfile = open(pidfilename, "w")
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
2460
2118
2461
for name in ("_mandos", "mandos", "nobody"):
2119
try:
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
2122
except KeyError:
2462
2123
try:
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
2466
2126
except KeyError:
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
2127
try:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
2130
except KeyError:
2131
uid = 65534
2132
gid = 65534
2471
2133
try:
2472
2134
os.setgid(gid)
2473
2135
os.setuid(uid)
2474
2136
except OSError as error:
2475
if error.errno != errno.EPERM:
2476
raise
2137
if error[0] != errno.EPERM:
2138
raise error
2477
2139
2478
2140
if debug:
2479
2141
# Enable all possible GnuTLS debugging
2490
2152
.gnutls_global_set_log_function(debug_gnutls))
2491
2153
2492
2154
# Redirect stdin so all checkers get /dev/null
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2494
2156
os.dup2(null, sys.stdin.fileno())
2495
2157
if null > 2:
2496
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2497
2162
2498
2163
# Need to fork before connecting to D-Bus
2499
if not foreground:
2164
if not debug:
2500
2165
# Close all input and output, do double fork, etc.
2501
2166
daemon()
2502
2167
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
2506
2507
2168
global main_loop
2508
2169
# From the Avahi example code
2509
DBusGMainLoop(set_as_default=True)
2170
DBusGMainLoop(set_as_default=True )
2510
2171
main_loop = gobject.MainLoop()
2511
2172
bus = dbus.SystemBus()
2512
2173
# End of Avahi example code
2518
2179
("se.bsnet.fukt.Mandos", bus,
2519
2180
do_not_queue=True))
2520
2181
except dbus.exceptions.NameExistsException as e:
2521
logger.error("Disabling D-Bus:", exc_info=e)
2182
logger.error(unicode(e) + ", disabling D-Bus")
2522
2183
use_dbus = False
2523
2184
server_settings["use_dbus"] = False
2524
2185
tcp_server.use_dbus = False
2525
if zeroconf:
2526
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
2531
if server_settings["interface"]:
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
2534
.encode("utf-8")))
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2535
2194
2536
2195
global multiprocessing_manager
2537
2196
multiprocessing_manager = multiprocessing.Manager()
2538
2197
2539
2198
client_class = Client
2540
2199
if use_dbus:
2541
client_class = functools.partial(ClientDBus, bus = bus)
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2542
2202
2543
2203
client_settings = Client.config_parser(client_config)
2544
2204
old_client_settings = {}
2545
2205
clients_data = {}
2546
2206
2547
# This is used to redirect stdout and stderr for checker processes
2548
global wnull
2549
wnull = open(os.devnull, "w") # A writable /dev/null
2550
# Only used if server is running in foreground but not in debug
2551
# mode
2552
if debug or not foreground:
2553
wnull.close()
2554
2555
2207
# Get client data and settings from last running state.
2556
2208
if server_settings["restore"]:
2557
2209
try:
2560
2212
(stored_state))
2561
2213
os.remove(stored_state_path)
2562
2214
except IOError as e:
2563
if e.errno == errno.ENOENT:
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
2566
else:
2567
logger.critical("Could not load persistent state:",
2568
exc_info=e)
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2569
2218
raise
2570
except EOFError as e:
2571
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
2573
2219
2574
2220
with PGPEngine() as pgp:
2575
for client_name, client in clients_data.items():
2576
# Skip removed clients
2577
if client_name not in client_settings:
2578
continue
2579
2221
for client_name, client in clients_data.iteritems():
2580
2222
# Decide which value to use after restoring saved state.
2581
2223
# We have three different values: Old config file,
2582
2224
# new config file, and saved state.
2596
2238
2597
2239
# Clients who has passed its expire date can still be
2598
2240
# enabled if its last checker was successful. Clients
2599
# whose checker succeeded before we stored its state is
2600
# assumed to have successfully run all checkers during
2601
# downtime.
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
2602
2243
if client["enabled"]:
2603
2244
if datetime.datetime.utcnow() >= client["expires"]:
2604
2245
if not client["last_checked_ok"]:
2605
2246
logger.warning(
2606
"disabling client {} - Client never "
2607
"performed a successful checker"
2608
.format(client_name))
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
2609
2250
client["enabled"] = False
2610
2251
elif client["last_checker_status"] != 0:
2611
2252
logger.warning(
2612
"disabling client {} - Client last"
2613
" checker failed with error code {}"
2614
.format(client_name,
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2615
2256
client["last_checker_status"]))
2616
2257
client["enabled"] = False
2617
2258
else:
2618
2259
client["expires"] = (datetime.datetime
2619
2260
.utcnow()
2620
2261
+ client["timeout"])
2621
logger.debug("Last checker succeeded,"
2622
" keeping {} enabled"
2623
.format(client_name))
2262
2624
2263
try:
2625
2264
client["secret"] = (
2626
2265
pgp.decrypt(client["encrypted_secret"],
2628
2267
["secret"]))
2629
2268
except PGPError:
2630
2269
# If decryption fails, we use secret from new settings
2631
logger.debug("Failed to decrypt {} old secret"
2270
logger.debug("Failed to decrypt {0} old secret"
2632
2271
.format(client_name))
2633
2272
client["secret"] = (
2634
2273
client_settings[client_name]["secret"])
2274
2635
2275
2636
2276
# Add/remove clients based on new changes made to config
2637
for client_name in (set(old_client_settings)
2638
- set(client_settings)):
2277
for client_name in set(old_client_settings) - set(client_settings):
2639
2278
del clients_data[client_name]
2640
for client_name in (set(client_settings)
2641
- set(old_client_settings)):
2279
for client_name in set(client_settings) - set(old_client_settings):
2642
2280
clients_data[client_name] = client_settings[client_name]
2643
2644
# Create all client objects
2645
for client_name, client in clients_data.items():
2281
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
2646
2284
tcp_server.clients[client_name] = client_class(
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
2285
name = client_name, settings = client)
2649
2286
2650
2287
if not tcp_server.clients:
2651
2288
logger.warning("No clients defined")
2652
2653
if not foreground:
2654
if pidfile is not None:
2655
try:
2656
with pidfile:
2657
pid = os.getpid()
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
2659
except IOError:
2660
logger.error("Could not write to file %r with PID %d",
2661
pidfilename, pid)
2662
del pidfile
2289
2290
if not debug:
2291
try:
2292
with pidfile:
2293
pid = os.getpid()
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2295
del pidfile
2296
except IOError:
2297
logger.error("Could not write to file %r with PID %d",
2298
pidfilename, pid)
2299
except NameError:
2300
# "pidfile" was never created
2301
pass
2663
2302
del pidfilename
2303
signal.signal(signal.SIGINT, signal.SIG_IGN)
2664
2304
2665
2305
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2666
2306
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2667
2307
2668
2308
if use_dbus:
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
2309
class MandosDBusService(dbus.service.Object):
2672
2310
"""A D-Bus proxy object"""
2673
2311
def __init__(self):
2674
2312
dbus.service.Object.__init__(self, bus, "/")
2675
2313
_interface = "se.recompile.Mandos"
2676
2314
2677
@dbus_interface_annotations(_interface)
2678
def _foo(self):
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
2681
"false"}
2682
2683
2315
@dbus.service.signal(_interface, signature="o")
2684
2316
def ClientAdded(self, objpath):
2685
2317
"D-Bus signal"
2727
2359
2728
2360
del _interface
2729
2361
2730
mandos_dbus_service = MandosDBusService()
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
2731
2365
2732
2366
def cleanup():
2733
2367
"Cleanup function; run on exit"
2734
if zeroconf:
2735
service.cleanup()
2368
service.cleanup()
2736
2369
2737
2370
multiprocessing.active_children()
2738
wnull.close()
2739
2371
if not (tcp_server.clients or client_settings):
2740
2372
return
2741
2373
2752
2384
2753
2385
# A list of attributes that can not be pickled
2754
2386
# + secret.
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2387
exclude = set(("bus", "changedstate", "secret",
2388
"checker"))
2757
2389
for name, typ in (inspect.getmembers
2758
2390
(dbus.service.Object)):
2759
2391
exclude.add(name)
2768
2400
del client_settings[client.name]["secret"]
2769
2401
2770
2402
try:
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2775
2406
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
2777
os.rename(tempname, stored_state_path)
2778
2407
except (IOError, OSError) as e:
2779
if not debug:
2780
try:
2781
os.remove(tempname)
2782
except NameError:
2783
pass
2784
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2785
logger.warning("Could not save persistent state: {}"
2786
.format(os.strerror(e.errno)))
2787
else:
2788
logger.warning("Could not save persistent state:",
2789
exc_info=e)
2408
logger.warning("Could not save persistent state: {0}"
2409
.format(e))
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
2790
2411
raise
2791
2412
2792
2413
# Delete all clients, and settings from config
2817
2438
tcp_server.server_activate()
2818
2439
2819
2440
# Find out what port we got
2820
if zeroconf:
2821
service.port = tcp_server.socket.getsockname()[1]
2441
service.port = tcp_server.socket.getsockname()[1]
2822
2442
if use_ipv6:
2823
2443
logger.info("Now listening on address %r, port %d,"
2824
" flowinfo %d, scope_id %d",
2825
*tcp_server.socket.getsockname())
2444
" flowinfo %d, scope_id %d"
2445
% tcp_server.socket.getsockname())
2826
2446
else: # IPv4
2827
logger.info("Now listening on address %r, port %d",
2828
*tcp_server.socket.getsockname())
2447
logger.info("Now listening on address %r, port %d"
2448
% tcp_server.socket.getsockname())
2829
2449
2830
2450
#service.interface = tcp_server.socket.getsockname()[3]
2831
2451
2832
2452
try:
2833
if zeroconf:
2834
# From the Avahi example code
2835
try:
2836
service.activate()
2837
except dbus.exceptions.DBusException as error:
2838
logger.critical("D-Bus Exception", exc_info=error)
2839
cleanup()
2840
sys.exit(1)
2841
# End of Avahi example code
2453
# From the Avahi example code
2454
try:
2455
service.activate()
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2458
cleanup()
2459
sys.exit(1)
2460
# End of Avahi example code
2842
2461
2843
2462
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2844
2463
lambda *args, **kwargs:
2848
2467
logger.debug("Starting main loop")
2849
2468
main_loop.run()
2850
2469
except AvahiError as error:
2851
logger.critical("Avahi Error", exc_info=error)
2470
logger.critical("AvahiError: %s", error)
2852
2471
cleanup()
2853
2472
sys.exit(1)
2854
2473
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0