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- Committer: Teddy Hogeborn
- Date: 2015-07-09 20:36:29 UTC
- Revision ID: teddy@recompile.se-20150709203629-439gfk6812u1azp3
Rename the "client-dhparams.pem" file to simply "dhparams.pem".
* debian/mandos-client.postinst: Rename the "client-dhparams.pem" file
to "dhparams.pem".
* initramfs-tools-hook: - '' -
* plugins.d/mandos-client.c (main): - '' -
* debian/mandos-client.postinst: Rename the "client-dhparams.pem" file
to "dhparams.pem".
* initramfs-tools-hook: - '' -
* plugins.d/mandos-client.c (main): - '' -
- files added:
- debian/mandos-client.examples
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
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
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
38
43
import socket
39
44
import argparse
40
45
import datetime
45
50
import gnutls.library.functions
46
51
import gnutls.library.constants
47
52
import gnutls.library.types
48
import ConfigParser as configparser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
49
57
import sys
50
58
import re
51
59
import os
60
68
import struct
61
69
import fcntl
62
70
import functools
63
import cPickle as pickle
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
64
75
import multiprocessing
65
76
import types
66
77
import binascii
67
78
import tempfile
79
import itertools
80
import collections
81
import codecs
68
82
69
83
import dbus
70
84
import dbus.service
71
import gobject
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
72
89
import avahi
73
90
from dbus.mainloop.glib import DBusGMainLoop
74
91
import ctypes
75
92
import ctypes.util
76
93
import xml.dom.minidom
77
94
import inspect
78
import GnuPGInterface
79
95
80
96
try:
81
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
101
except ImportError:
86
102
SO_BINDTODEVICE = None
87
103
88
version = "1.5.0"
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
89
108
stored_state_file = "clients.pickle"
90
109
91
110
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
111
syslogger = None
95
112
96
113
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
100
116
except (OSError, AttributeError):
117
101
118
def if_nametoindex(interface):
102
119
"Get an interface index the hard way, i.e. using fcntl()"
103
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
121
with contextlib.closing(socket.socket()) as s:
105
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
125
return interface_index
111
126
112
127
113
128
def initlogger(debug, level=logging.WARNING):
114
129
"""init logger and add loglevel"""
115
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
116
135
syslogger.setFormatter(logging.Formatter
117
136
('Mandos [%(process)d]: %(levelname)s:'
118
137
' %(message)s'))
135
154
136
155
class PGPEngine(object):
137
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
138
158
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
147
165
148
166
def __enter__(self):
149
167
return self
150
168
151
def __exit__ (self, exc_type, exc_value, traceback):
169
def __exit__(self, exc_type, exc_value, traceback):
152
170
self._cleanup()
153
171
return False
154
172
171
189
def password_encode(self, password):
172
190
# Passphrase can not be empty and can not contain newlines or
173
191
# NUL bytes. So we prefix it and hex encode it.
174
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
175
199
176
200
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
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)
191
216
return ciphertext
192
217
193
218
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
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)
208
234
return decrypted_plaintext
209
235
210
236
211
212
237
class AvahiError(Exception):
213
238
def __init__(self, value, *args, **kwargs):
214
239
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
218
243
219
244
class AvahiServiceError(AvahiError):
220
245
pass
221
246
247
222
248
class AvahiGroupError(AvahiError):
223
249
pass
224
250
231
257
Used to optionally bind to the specified interface.
232
258
name: string; Example: 'Mandos'
233
259
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
260
See <https://www.iana.org/assignments/service-names-port-numbers>
235
261
port: integer; what port to announce
236
262
TXT: list of strings; TXT record for the service
237
263
domain: string; Domain to publish on, default to .local if empty.
243
269
server: D-Bus Server
244
270
bus: dbus.SystemBus()
245
271
"""
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
272
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):
250
284
self.interface = interface
251
285
self.name = name
252
286
self.type = servicetype
261
295
self.server = None
262
296
self.bus = bus
263
297
self.entry_group_state_changed_match = None
264
def rename(self):
298
299
def rename(self, remove=True):
265
300
"""Derived from the Avahi example code"""
266
301
if self.rename_count >= self.max_renames:
267
302
logger.critical("No suitable Zeroconf service name found"
268
303
" after %i retries, exiting.",
269
304
self.rename_count)
270
305
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
273
309
logger.info("Changing Zeroconf service name to %r ...",
274
310
self.name)
275
self.remove()
311
if remove:
312
self.remove()
276
313
try:
277
314
self.add()
278
315
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
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)
324
283
325
def remove(self):
284
326
"""Derived from the Avahi example code"""
285
327
if self.entry_group_state_changed_match is not None:
287
329
self.entry_group_state_changed_match = None
288
330
if self.group is not None:
289
331
self.group.Reset()
332
290
333
def add(self):
291
334
"""Derived from the Avahi example code"""
292
335
self.remove()
309
352
dbus.UInt16(self.port),
310
353
avahi.string_array_to_txt_array(self.TXT))
311
354
self.group.Commit()
355
312
356
def entry_group_state_changed(self, state, error):
313
357
"""Derived from the Avahi example code"""
314
358
logger.debug("Avahi entry group state change: %i", state)
320
364
self.rename()
321
365
elif state == avahi.ENTRY_GROUP_FAILURE:
322
366
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
326
370
def cleanup(self):
327
371
"""Derived from the Avahi example code"""
328
372
if self.group is not None:
333
377
pass
334
378
self.group = None
335
379
self.remove()
380
336
381
def server_state_changed(self, state, error=None):
337
382
"""Derived from the Avahi example code"""
338
383
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
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
}
346
390
if state in bad_states:
347
391
if bad_states[state] is not None:
348
392
if error is None:
357
401
logger.debug("Unknown state: %r", state)
358
402
else:
359
403
logger.debug("Unknown state: %r: %r", state, error)
404
360
405
def activate(self):
361
406
"""Derived from the Avahi example code"""
362
407
if self.server is None:
366
411
follow_name_owner_changes=True),
367
412
avahi.DBUS_INTERFACE_SERVER)
368
413
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
414
self.server_state_changed)
370
415
self.server_state_changed(self.server.GetState())
371
416
417
372
418
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
419
def rename(self, *args, **kwargs):
374
420
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
421
ret = AvahiService.rename(self, *args, **kwargs)
422
syslogger.setFormatter(logging.Formatter(
423
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
424
.format(self.name)))
380
425
return ret
381
426
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
427
def call_pipe(connection, # : multiprocessing.Connection
428
func, *args, **kwargs):
429
"""This function is meant to be called by multiprocessing.Process
430
431
This function runs func(*args, **kwargs), and writes the resulting
432
return value on the provided multiprocessing.Connection.
433
"""
434
connection.send(func(*args, **kwargs))
435
connection.close()
436
388
437
class Client(object):
389
438
"""A representation of a client host served by this server.
390
439
415
464
last_checked_ok: datetime.datetime(); (UTC) or None
416
465
last_checker_status: integer between 0 and 255 reflecting exit
417
466
status of last checker. -1 reflects crashed
418
checker, or None.
467
checker, -2 means no checker completed yet.
468
last_checker_signal: The signal which killed the last checker, if
469
last_checker_status is -1
419
470
last_enabled: datetime.datetime(); (UTC) or None
420
471
name: string; from the config file, used in log messages and
421
472
D-Bus identifiers
422
473
secret: bytestring; sent verbatim (over TLS) to client
423
474
timeout: datetime.timedelta(); How long from last_checked_ok
424
475
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
476
extended_timeout: extra long timeout when secret has been sent
426
477
runtime_expansions: Allowed attributes for runtime expansion.
427
478
expires: datetime.datetime(); time (UTC) when a client will be
428
479
disabled, or None
480
server_settings: The server_settings dict from main()
429
481
"""
430
482
431
483
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
484
"created", "enabled", "expires",
485
"fingerprint", "host", "interval",
486
"last_approval_request", "last_checked_ok",
434
487
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
488
client_defaults = {
489
"timeout": "PT5M",
490
"extended_timeout": "PT15M",
491
"interval": "PT2M",
492
"checker": "fping -q -- %%(host)s",
493
"host": "",
494
"approval_delay": "PT0S",
495
"approval_duration": "PT1S",
496
"approved_by_default": "True",
497
"enabled": "True",
498
}
499
461
500
@staticmethod
462
501
def config_parser(config):
463
502
"""Construct a new dict of client settings of this form:
478
517
client["enabled"] = config.getboolean(client_name,
479
518
"enabled")
480
519
520
# Uppercase and remove spaces from fingerprint for later
521
# comparison purposes with return value from the
522
# fingerprint() function
481
523
client["fingerprint"] = (section["fingerprint"].upper()
482
524
.replace(" ", ""))
483
525
if "secret" in section:
488
530
"rb") as secfile:
489
531
client["secret"] = secfile.read()
490
532
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
533
raise TypeError("No secret or secfile for section {}"
534
.format(section))
493
535
client["timeout"] = string_to_delta(section["timeout"])
494
536
client["extended_timeout"] = string_to_delta(
495
537
section["extended_timeout"])
501
543
client["checker_command"] = section["checker"]
502
544
client["last_approval_request"] = None
503
545
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
546
client["last_checker_status"] = -2
505
547
506
548
return settings
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
549
550
def __init__(self, settings, name = None, server_settings=None):
513
551
self.name = name
552
if server_settings is None:
553
server_settings = {}
554
self.server_settings = server_settings
514
555
# adding all client settings
515
for setting, value in settings.iteritems():
556
for setting, value in settings.items():
516
557
setattr(self, setting, value)
517
558
518
559
if self.enabled:
524
565
else:
525
566
self.last_enabled = None
526
567
self.expires = None
527
568
528
569
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
532
570
logger.debug(" Fingerprint: %s", self.fingerprint)
533
571
self.created = settings.get("created",
534
572
datetime.datetime.utcnow())
535
573
536
574
# attributes specific for this server instance
537
575
self.checker = None
538
576
self.checker_initiator_tag = None
541
579
self.current_checker_command = None
542
580
self.approved = None
543
581
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
582
self.changedstate = multiprocessing_manager.Condition(
583
multiprocessing_manager.Lock())
584
self.client_structure = [attr
585
for attr in self.__dict__.iterkeys()
549
586
if not attr.startswith("_")]
550
587
self.client_structure.append("client_structure")
551
588
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
589
for name, t in inspect.getmembers(
590
type(self), lambda obj: isinstance(obj, property)):
556
591
if not name.startswith("_"):
557
592
self.client_structure.append(name)
558
593
566
601
if getattr(self, "enabled", False):
567
602
# Already enabled
568
603
return
569
self.send_changedstate()
570
604
self.expires = datetime.datetime.utcnow() + self.timeout
571
605
self.enabled = True
572
606
self.last_enabled = datetime.datetime.utcnow()
573
607
self.init_checker()
608
self.send_changedstate()
574
609
575
610
def disable(self, quiet=True):
576
611
"""Disable this client."""
577
612
if not getattr(self, "enabled", False):
578
613
return False
579
614
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
615
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
616
if getattr(self, "disable_initiator_tag", None) is not None:
584
617
gobject.source_remove(self.disable_initiator_tag)
585
618
self.disable_initiator_tag = None
586
619
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
620
if getattr(self, "checker_initiator_tag", None) is not None:
588
621
gobject.source_remove(self.checker_initiator_tag)
589
622
self.checker_initiator_tag = None
590
623
self.stop_checker()
591
624
self.enabled = False
625
if not quiet:
626
self.send_changedstate()
592
627
# Do not run this again if called by a gobject.timeout_add
593
628
return False
594
629
598
633
def init_checker(self):
599
634
# Schedule a new checker to be started an 'interval' from now,
600
635
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
636
if self.checker_initiator_tag is not None:
637
gobject.source_remove(self.checker_initiator_tag)
638
self.checker_initiator_tag = gobject.timeout_add(
639
int(self.interval.total_seconds() * 1000),
640
self.start_checker)
604
641
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
642
if self.disable_initiator_tag is not None:
643
gobject.source_remove(self.disable_initiator_tag)
644
self.disable_initiator_tag = gobject.timeout_add(
645
int(self.timeout.total_seconds() * 1000), self.disable)
608
646
# Also start a new checker *right now*.
609
647
self.start_checker()
610
648
611
def checker_callback(self, pid, condition, command):
649
def checker_callback(self, source, condition, connection,
650
command):
612
651
"""The checker has completed, so take appropriate actions."""
613
652
self.checker_callback_tag = None
614
653
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
654
# Read return code from connection (see call_pipe)
655
returncode = connection.recv()
656
connection.close()
657
658
if returncode >= 0:
659
self.last_checker_status = returncode
660
self.last_checker_signal = None
617
661
if self.last_checker_status == 0:
618
662
logger.info("Checker for %(name)s succeeded",
619
663
vars(self))
620
664
self.checked_ok()
621
665
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
666
logger.info("Checker for %(name)s failed", vars(self))
624
667
else:
625
668
self.last_checker_status = -1
669
self.last_checker_signal = -returncode
626
670
logger.warning("Checker for %(name)s crashed?",
627
671
vars(self))
628
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
631
632
This should only be called when the client has been seen,
633
alive and well.
634
"""
672
return False
673
674
def checked_ok(self):
675
"""Assert that the client has been seen, alive and well."""
676
self.last_checked_ok = datetime.datetime.utcnow()
677
self.last_checker_status = 0
678
self.last_checker_signal = None
679
self.bump_timeout()
680
681
def bump_timeout(self, timeout=None):
682
"""Bump up the timeout for this client."""
635
683
if timeout is None:
636
684
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
685
if self.disable_initiator_tag is not None:
639
686
gobject.source_remove(self.disable_initiator_tag)
687
self.disable_initiator_tag = None
640
688
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
689
self.disable_initiator_tag = gobject.timeout_add(
690
int(timeout.total_seconds() * 1000), self.disable)
644
691
self.expires = datetime.datetime.utcnow() + timeout
645
692
646
693
def need_approval(self):
652
699
If a checker already exists, leave it running and do
653
700
nothing."""
654
701
# The reason for not killing a running checker is that if we
655
# did that, then if a checker (for some reason) started
656
# running slowly and taking more than 'interval' time, the
657
# client would inevitably timeout, since no checker would get
658
# a chance to run to completion. If we instead leave running
702
# did that, and if a checker (for some reason) started running
703
# slowly and taking more than 'interval' time, then the client
704
# would inevitably timeout, since no checker would get a
705
# chance to run to completion. If we instead leave running
659
706
# checkers alone, the checker would have to take more time
660
707
# than 'timeout' for the client to be disabled, which is as it
661
708
# should be.
662
709
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
710
if self.checker is not None and not self.checker.is_alive():
711
logger.warning("Checker was not alive; joining")
712
self.checker.join()
713
self.checker = None
676
714
# Start a new checker if needed
677
715
if self.checker is None:
716
# Escape attributes for the shell
717
escaped_attrs = {
718
attr: re.escape(str(getattr(self, attr)))
719
for attr in self.runtime_expansions }
678
720
try:
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
681
except TypeError:
682
# Escape attributes for the shell
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
691
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
696
return True # Try again later
721
command = self.checker_command % escaped_attrs
722
except TypeError as error:
723
logger.error('Could not format string "%s"',
724
self.checker_command,
725
exc_info=error)
726
return True # Try again later
697
727
self.current_checker_command = command
698
try:
699
logger.info("Starting checker %r for %s",
700
command, self.name)
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
self.checker = subprocess.Popen(command,
706
close_fds=True,
707
shell=True, cwd="/")
708
self.checker_callback_tag = (gobject.child_watch_add
709
(self.checker.pid,
710
self.checker_callback,
711
data=command))
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
720
error)
728
logger.info("Starting checker %r for %s", command,
729
self.name)
730
# We don't need to redirect stdout and stderr, since
731
# in normal mode, that is already done by daemon(),
732
# and in debug mode we don't want to. (Stdin is
733
# always replaced by /dev/null.)
734
# The exception is when not debugging but nevertheless
735
# running in the foreground; use the previously
736
# created wnull.
737
popen_args = { "close_fds": True,
738
"shell": True,
739
"cwd": "/" }
740
if (not self.server_settings["debug"]
741
and self.server_settings["foreground"]):
742
popen_args.update({"stdout": wnull,
743
"stderr": wnull })
744
pipe = multiprocessing.Pipe(duplex = False)
745
self.checker = multiprocessing.Process(
746
target = call_pipe,
747
args = (pipe[1], subprocess.call, command),
748
kwargs = popen_args)
749
self.checker.start()
750
self.checker_callback_tag = gobject.io_add_watch(
751
pipe[0].fileno(), gobject.IO_IN,
752
self.checker_callback, pipe[0], command)
721
753
# Re-run this periodically if run by gobject.timeout_add
722
754
return True
723
755
729
761
if getattr(self, "checker", None) is None:
730
762
return
731
763
logger.debug("Stopping checker for %(name)s", vars(self))
732
try:
733
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
735
#if self.checker.poll() is None:
736
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
738
if error.errno != errno.ESRCH: # No such process
739
raise
764
self.checker.terminate()
740
765
self.checker = None
741
766
742
767
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
768
def dbus_service_property(dbus_interface,
769
signature="v",
770
access="readwrite",
771
byte_arrays=False):
745
772
"""Decorators for marking methods of a DBusObjectWithProperties to
746
773
become properties on the D-Bus.
747
774
756
783
# "Set" method, so we fail early here:
757
784
if byte_arrays and signature != "ay":
758
785
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
786
" signature {!r}".format(signature))
787
760
788
def decorator(func):
761
789
func._dbus_is_property = True
762
790
func._dbus_interface = dbus_interface
767
795
func._dbus_name = func._dbus_name[:-14]
768
796
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
797
return func
798
799
return decorator
800
801
802
def dbus_interface_annotations(dbus_interface):
803
"""Decorator for marking functions returning interface annotations
804
805
Usage:
806
807
@dbus_interface_annotations("org.example.Interface")
808
def _foo(self): # Function name does not matter
809
return {"org.freedesktop.DBus.Deprecated": "true",
810
"org.freedesktop.DBus.Property.EmitsChangedSignal":
811
"false"}
812
"""
813
814
def decorator(func):
815
func._dbus_is_interface = True
816
func._dbus_interface = dbus_interface
817
func._dbus_name = dbus_interface
818
return func
819
820
return decorator
821
822
823
def dbus_annotations(annotations):
824
"""Decorator to annotate D-Bus methods, signals or properties
825
Usage:
826
827
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
828
"org.freedesktop.DBus.Property."
829
"EmitsChangedSignal": "false"})
830
@dbus_service_property("org.example.Interface", signature="b",
831
access="r")
832
def Property_dbus_property(self):
833
return dbus.Boolean(False)
834
"""
835
836
def decorator(func):
837
func._dbus_annotations = annotations
838
return func
839
770
840
return decorator
771
841
772
842
773
843
class DBusPropertyException(dbus.exceptions.DBusException):
774
844
"""A base class for D-Bus property-related exceptions
775
845
"""
776
def __unicode__(self):
777
return unicode(str(self))
846
pass
778
847
779
848
780
849
class DBusPropertyAccessException(DBusPropertyException):
798
867
"""
799
868
800
869
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
870
def _is_dbus_thing(thing):
871
"""Returns a function testing if an attribute is a D-Bus thing
872
873
If called like _is_dbus_thing("method") it returns a function
874
suitable for use as predicate to inspect.getmembers().
875
"""
876
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
877
False)
803
878
804
def _get_all_dbus_properties(self):
879
def _get_all_dbus_things(self, thing):
805
880
"""Returns a generator of (name, attribute) pairs
806
881
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
882
return ((getattr(athing.__get__(self), "_dbus_name", name),
883
athing.__get__(self))
808
884
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
885
for name, athing in
886
inspect.getmembers(cls, self._is_dbus_thing(thing)))
811
887
812
888
def _get_dbus_property(self, interface_name, property_name):
813
889
"""Returns a bound method if one exists which is a D-Bus
814
890
property with the specified name and interface.
815
891
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
892
for cls in self.__class__.__mro__:
893
for name, value in inspect.getmembers(
894
cls, self._is_dbus_thing("property")):
819
895
if (value._dbus_name == property_name
820
896
and value._dbus_interface == interface_name):
821
897
return value.__get__(self)
822
898
823
899
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
900
raise DBusPropertyNotFound("{}:{}.{}".format(
901
self.dbus_object_path, interface_name, property_name))
827
902
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
903
@dbus.service.method(dbus.PROPERTIES_IFACE,
904
in_signature="ss",
829
905
out_signature="v")
830
906
def Get(self, interface_name, property_name):
831
907
"""Standard D-Bus property Get() method, see D-Bus standard.
849
925
# The byte_arrays option is not supported yet on
850
926
# signatures other than "ay".
851
927
if prop._dbus_signature != "ay":
852
raise ValueError
928
raise ValueError("Byte arrays not supported for non-"
929
"'ay' signature {!r}"
930
.format(prop._dbus_signature))
853
931
value = dbus.ByteArray(b''.join(chr(byte)
854
932
for byte in value))
855
933
prop(value)
856
934
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
935
@dbus.service.method(dbus.PROPERTIES_IFACE,
936
in_signature="s",
858
937
out_signature="a{sv}")
859
938
def GetAll(self, interface_name):
860
939
"""Standard D-Bus property GetAll() method, see D-Bus
863
942
Note: Will not include properties with access="write".
864
943
"""
865
944
properties = {}
866
for name, prop in self._get_all_dbus_properties():
945
for name, prop in self._get_all_dbus_things("property"):
867
946
if (interface_name
868
947
and interface_name != prop._dbus_interface):
869
948
# Interface non-empty but did not match
875
954
if not hasattr(value, "variant_level"):
876
955
properties[name] = value
877
956
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
957
properties[name] = type(value)(
958
value, variant_level = value.variant_level + 1)
880
959
return dbus.Dictionary(properties, signature="sv")
881
960
961
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
962
def PropertiesChanged(self, interface_name, changed_properties,
963
invalidated_properties):
964
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
965
standard.
966
"""
967
pass
968
882
969
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
970
out_signature="s",
884
971
path_keyword='object_path',
885
972
connection_keyword='connection')
886
973
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
974
"""Overloading of standard D-Bus method.
975
976
Inserts property tags and interface annotation tags.
888
977
"""
889
978
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
979
connection)
891
980
try:
892
981
document = xml.dom.minidom.parseString(xmlstring)
982
893
983
def make_tag(document, name, prop):
894
984
e = document.createElement("property")
895
985
e.setAttribute("name", name)
896
986
e.setAttribute("type", prop._dbus_signature)
897
987
e.setAttribute("access", prop._dbus_access)
898
988
return e
989
899
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
900
992
for tag in (make_tag(document, name, prop)
901
993
for name, prop
902
in self._get_all_dbus_properties()
994
in self._get_all_dbus_things("property")
903
995
if prop._dbus_interface
904
996
== if_tag.getAttribute("name")):
905
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr(
1008
prop, "_dbus_annotations", {}))
1009
for name, value in annots.items():
1010
ann_tag = document.createElement(
1011
"annotation")
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().items()
1019
for name, annotations
1020
in self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1022
)).items():
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
906
1027
# Add the names to the return values for the
907
1028
# "org.freedesktop.DBus.Properties" methods
908
1029
if (if_tag.getAttribute("name")
923
1044
except (AttributeError, xml.dom.DOMException,
924
1045
xml.parsers.expat.ExpatError) as error:
925
1046
logger.error("Failed to override Introspection method",
926
error)
1047
exc_info=error)
927
1048
return xmlstring
928
1049
929
1050
930
def datetime_to_dbus (dt, variant_level=0):
1051
def datetime_to_dbus(dt, variant_level=0):
931
1052
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
1053
if dt is None:
933
1054
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
1055
return dbus.String(dt.isoformat(), variant_level=variant_level)
1056
1057
1058
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1059
"""A class decorator; applied to a subclass of
1060
dbus.service.Object, it will add alternate D-Bus attributes with
1061
interface names according to the "alt_interface_names" mapping.
1062
Usage:
1063
1064
@alternate_dbus_interfaces({"org.example.Interface":
1065
"net.example.AlternateInterface"})
1066
class SampleDBusObject(dbus.service.Object):
1067
@dbus.service.method("org.example.Interface")
1068
def SampleDBusMethod():
1069
pass
1070
1071
The above "SampleDBusMethod" on "SampleDBusObject" will be
1072
reachable via two interfaces: "org.example.Interface" and
1073
"net.example.AlternateInterface", the latter of which will have
1074
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1075
"true", unless "deprecate" is passed with a False value.
1076
1077
This works for methods and signals, and also for D-Bus properties
1078
(from DBusObjectWithProperties) and interfaces (from the
1079
dbus_interface_annotations decorator).
942
1080
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
1081
1082
def wrapper(cls):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.items()):
1085
attr = {}
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
950
1089
# Ignore non-D-Bus attributes, and D-Bus attributes
951
1090
# with the wrong interface name
952
1091
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1092
or not attribute._dbus_interface.startswith(
1093
orig_interface_name)):
955
1094
continue
956
1095
# Create an alternate D-Bus interface name based on
957
1096
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1097
alt_interface = attribute._dbus_interface.replace(
1098
orig_interface_name, alt_interface_name)
1099
interface_names.add(alt_interface)
961
1100
# Is this a D-Bus signal?
962
1101
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
1102
if sys.version_info.major == 2:
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
966
1106
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
1107
attribute.__closure__))
1108
["func"].cell_contents)
1109
else:
1110
nonmethod_func = attribute
969
1111
# Create a new, but exactly alike, function
970
1112
# object, and decorate it to be a new D-Bus signal
971
1113
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
1114
if sys.version_info.major == 2:
1115
new_function = types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)
1121
else:
1122
new_function = types.FunctionType(
1123
nonmethod_func.__code__,
1124
nonmethod_func.__globals__,
1125
nonmethod_func.__name__,
1126
nonmethod_func.__defaults__,
1127
nonmethod_func.__closure__)
1128
new_function = (dbus.service.signal(
1129
alt_interface,
1130
attribute._dbus_signature)(new_function))
1131
# Copy annotations, if any
1132
try:
1133
new_function._dbus_annotations = dict(
1134
attribute._dbus_annotations)
1135
except AttributeError:
1136
pass
981
1137
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
1138
# original and alternate functions, so both the
1139
# original and alternate signals gets sent when
1140
# the function is called
984
1141
def fixscope(func1, func2):
985
1142
"""This function is a scope container to pass
986
1143
func1 and func2 to the "call_both" function
987
1144
outside of its arguments"""
1145
988
1146
def call_both(*args, **kwargs):
989
1147
"""This function will emit two D-Bus
990
1148
signals by calling func1 and func2"""
991
1149
func1(*args, **kwargs)
992
1150
func2(*args, **kwargs)
1151
993
1152
return call_both
994
1153
# Create the "call_both" function and add it to
995
1154
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
1155
attr[attrname] = fixscope(attribute, new_function)
998
1156
# Is this a D-Bus method?
999
1157
elif getattr(attribute, "_dbus_is_method", False):
1000
1158
# Create a new, but exactly alike, function
1001
1159
# object. Decorate it to be a new D-Bus method
1002
1160
# with the alternate D-Bus interface name. Add it
1003
1161
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1162
attr[attrname] = (
1163
dbus.service.method(
1164
alt_interface,
1165
attribute._dbus_in_signature,
1166
attribute._dbus_out_signature)
1167
(types.FunctionType(attribute.func_code,
1168
attribute.func_globals,
1169
attribute.func_name,
1170
attribute.func_defaults,
1171
attribute.func_closure)))
1172
# Copy annotations, if any
1173
try:
1174
attr[attrname]._dbus_annotations = dict(
1175
attribute._dbus_annotations)
1176
except AttributeError:
1177
pass
1014
1178
# Is this a D-Bus property?
1015
1179
elif getattr(attribute, "_dbus_is_property", False):
1016
1180
# Create a new, but exactly alike, function
1017
1181
# object, and decorate it to be a new D-Bus
1018
1182
# property with the alternate D-Bus interface
1019
1183
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1184
attr[attrname] = (dbus_service_property(
1185
alt_interface, attribute._dbus_signature,
1186
attribute._dbus_access,
1187
attribute._dbus_get_args_options
1188
["byte_arrays"])
1189
(types.FunctionType(
1190
attribute.func_code,
1191
attribute.func_globals,
1192
attribute.func_name,
1193
attribute.func_defaults,
1194
attribute.func_closure)))
1195
# Copy annotations, if any
1196
try:
1197
attr[attrname]._dbus_annotations = dict(
1198
attribute._dbus_annotations)
1199
except AttributeError:
1200
pass
1201
# Is this a D-Bus interface?
1202
elif getattr(attribute, "_dbus_is_interface", False):
1203
# Create a new, but exactly alike, function
1204
# object. Decorate it to be a new D-Bus interface
1205
# with the alternate D-Bus interface name. Add it
1206
# to the class.
1207
attr[attrname] = (
1208
dbus_interface_annotations(alt_interface)
1209
(types.FunctionType(attribute.func_code,
1210
attribute.func_globals,
1211
attribute.func_name,
1212
attribute.func_defaults,
1213
attribute.func_closure)))
1214
if deprecate:
1215
# Deprecate all alternate interfaces
1216
iname="_AlternateDBusNames_interface_annotation{}"
1217
for interface_name in interface_names:
1218
1219
@dbus_interface_annotations(interface_name)
1220
def func(self):
1221
return { "org.freedesktop.DBus.Deprecated":
1222
"true" }
1223
# Find an unused name
1224
for aname in (iname.format(i)
1225
for i in itertools.count()):
1226
if aname not in attr:
1227
attr[aname] = func
1228
break
1229
if interface_names:
1230
# Replace the class with a new subclass of it with
1231
# methods, signals, etc. as created above.
1232
cls = type(b"{}Alternate".format(cls.__name__),
1233
(cls, ), attr)
1234
return cls
1235
1236
return wrapper
1237
1238
1239
@alternate_dbus_interfaces({"se.recompile.Mandos":
1240
"se.bsnet.fukt.Mandos"})
1036
1241
class ClientDBus(Client, DBusObjectWithProperties):
1037
1242
"""A Client class using D-Bus
1038
1243
1042
1247
"""
1043
1248
1044
1249
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1250
+ ("dbus_object_path", ))
1251
1252
_interface = "se.recompile.Mandos.Client"
1046
1253
1047
1254
# dbus.service.Object doesn't use super(), so we can't either.
1048
1255
1049
1256
def __init__(self, bus = None, *args, **kwargs):
1050
1257
self.bus = bus
1051
1258
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1055
1259
# Only now, when this client is initialized, can it show up on
1056
1260
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1261
client_object_name = str(self.name).translate(
1058
1262
{ord("."): ord("_"),
1059
1263
ord("-"): ord("_")})
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1264
self.dbus_object_path = dbus.ObjectPath(
1265
"/clients/" + client_object_name)
1062
1266
DBusObjectWithProperties.__init__(self, self.bus,
1063
1267
self.dbus_object_path)
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1268
1269
def notifychangeproperty(transform_func, dbus_name,
1270
type_func=lambda x: x,
1271
variant_level=1,
1272
invalidate_only=False,
1273
_interface=_interface):
1068
1274
""" Modify a variable so that it's a property which announces
1069
1275
its changes to DBus.
1070
1276
1075
1281
to the D-Bus. Default: no transform
1076
1282
variant_level: D-Bus variant level. Default: 1
1077
1283
"""
1078
attrname = "_{0}".format(dbus_name)
1284
attrname = "_{}".format(dbus_name)
1285
1079
1286
def setter(self, value):
1080
1287
if hasattr(self, "dbus_object_path"):
1081
1288
if (not hasattr(self, attrname) or
1082
1289
type_func(getattr(self, attrname, None))
1083
1290
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1291
if invalidate_only:
1292
self.PropertiesChanged(
1293
_interface, dbus.Dictionary(),
1294
dbus.Array((dbus_name, )))
1295
else:
1296
dbus_value = transform_func(
1297
type_func(value),
1298
variant_level = variant_level)
1299
self.PropertyChanged(dbus.String(dbus_name),
1300
dbus_value)
1301
self.PropertiesChanged(
1302
_interface,
1303
dbus.Dictionary({ dbus.String(dbus_name):
1304
dbus_value }),
1305
dbus.Array())
1089
1306
setattr(self, attrname, value)
1090
1307
1091
1308
return property(lambda self: getattr(self, attrname), setter)
1092
1309
1093
1094
1310
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
1311
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
1312
"ApprovalPending",
1098
1314
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
1315
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
1316
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1317
checker = notifychangeproperty(
1318
dbus.Boolean, "CheckerRunning",
1319
type_func = lambda checker: checker is not None)
1104
1320
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
1321
"LastCheckedOK")
1322
last_checker_status = notifychangeproperty(dbus.Int16,
1323
"LastCheckerStatus")
1106
1324
last_approval_request = notifychangeproperty(
1107
1325
datetime_to_dbus, "LastApprovalRequest")
1108
1326
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
1327
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1328
approval_delay = notifychangeproperty(
1329
dbus.UInt64, "ApprovalDelay",
1330
type_func = lambda td: td.total_seconds() * 1000)
1114
1331
approval_duration = notifychangeproperty(
1115
1332
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1333
type_func = lambda td: td.total_seconds() * 1000)
1117
1334
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1335
timeout = notifychangeproperty(
1336
dbus.UInt64, "Timeout",
1337
type_func = lambda td: td.total_seconds() * 1000)
1121
1338
extended_timeout = notifychangeproperty(
1122
1339
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1340
type_func = lambda td: td.total_seconds() * 1000)
1341
interval = notifychangeproperty(
1342
dbus.UInt64, "Interval",
1343
type_func = lambda td: td.total_seconds() * 1000)
1128
1344
checker_command = notifychangeproperty(dbus.String, "Checker")
1345
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
invalidate_only=True)
1129
1347
1130
1348
del notifychangeproperty
1131
1349
1138
1356
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
1357
Client.__del__(self, *args, **kwargs)
1140
1358
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1359
def checker_callback(self, source, condition,
1360
connection, command, *args, **kwargs):
1361
ret = Client.checker_callback(self, source, condition,
1362
connection, command, *args,
1363
**kwargs)
1364
exitstatus = self.last_checker_status
1365
if exitstatus >= 0:
1147
1366
# Emit D-Bus signal
1148
1367
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1368
dbus.Int64(0),
1150
1369
dbus.String(command))
1151
1370
else:
1152
1371
# Emit D-Bus signal
1153
1372
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1373
dbus.Int64(
1374
self.last_checker_signal),
1155
1375
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1376
return ret
1159
1377
1160
1378
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1379
old_checker_pid = getattr(self.checker, "pid", None)
1166
1380
r = Client.start_checker(self, *args, **kwargs)
1167
1381
# Only if new checker process was started
1168
1382
if (self.checker is not None
1176
1390
return False
1177
1391
1178
1392
def approve(self, value=True):
1179
self.send_changedstate()
1180
1393
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1394
gobject.timeout_add(int(self.approval_duration.total_seconds()
1395
* 1000), self._reset_approved)
1396
self.send_changedstate()
1185
1397
1186
1398
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1399
1400
## Interfaces
1188
1401
1189
1402
## Signals
1190
1403
1201
1414
pass
1202
1415
1203
1416
# PropertyChanged - signal
1417
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1204
1418
@dbus.service.signal(_interface, signature="sv")
1205
1419
def PropertyChanged(self, property, value):
1206
1420
"D-Bus signal"
1227
1441
"D-Bus signal"
1228
1442
return self.need_approval()
1229
1443
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
1444
## Methods
1239
1445
1240
1446
# Approve - method
1278
1484
return dbus.Boolean(bool(self.approvals_pending))
1279
1485
1280
1486
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1487
@dbus_service_property(_interface,
1488
signature="b",
1282
1489
access="readwrite")
1283
1490
def ApprovedByDefault_dbus_property(self, value=None):
1284
1491
if value is None: # get
1286
1493
self.approved_by_default = bool(value)
1287
1494
1288
1495
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1496
@dbus_service_property(_interface,
1497
signature="t",
1290
1498
access="readwrite")
1291
1499
def ApprovalDelay_dbus_property(self, value=None):
1292
1500
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1501
return dbus.UInt64(self.approval_delay.total_seconds()
1502
* 1000)
1294
1503
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
1504
1296
1505
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1506
@dbus_service_property(_interface,
1507
signature="t",
1298
1508
access="readwrite")
1299
1509
def ApprovalDuration_dbus_property(self, value=None):
1300
1510
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1511
return dbus.UInt64(self.approval_duration.total_seconds()
1512
* 1000)
1303
1513
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
1514
1305
1515
# Name - property
1313
1523
return dbus.String(self.fingerprint)
1314
1524
1315
1525
# Host - property
1316
@dbus_service_property(_interface, signature="s",
1526
@dbus_service_property(_interface,
1527
signature="s",
1317
1528
access="readwrite")
1318
1529
def Host_dbus_property(self, value=None):
1319
1530
if value is None: # get
1320
1531
return dbus.String(self.host)
1321
self.host = unicode(value)
1532
self.host = str(value)
1322
1533
1323
1534
# Created - property
1324
1535
@dbus_service_property(_interface, signature="s", access="read")
1331
1542
return datetime_to_dbus(self.last_enabled)
1332
1543
1333
1544
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1545
@dbus_service_property(_interface,
1546
signature="b",
1335
1547
access="readwrite")
1336
1548
def Enabled_dbus_property(self, value=None):
1337
1549
if value is None: # get
1342
1554
self.disable()
1343
1555
1344
1556
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1557
@dbus_service_property(_interface,
1558
signature="s",
1346
1559
access="readwrite")
1347
1560
def LastCheckedOK_dbus_property(self, value=None):
1348
1561
if value is not None:
1350
1563
return
1351
1564
return datetime_to_dbus(self.last_checked_ok)
1352
1565
1566
# LastCheckerStatus - property
1567
@dbus_service_property(_interface, signature="n", access="read")
1568
def LastCheckerStatus_dbus_property(self):
1569
return dbus.Int16(self.last_checker_status)
1570
1353
1571
# Expires - property
1354
1572
@dbus_service_property(_interface, signature="s", access="read")
1355
1573
def Expires_dbus_property(self):
1361
1579
return datetime_to_dbus(self.last_approval_request)
1362
1580
1363
1581
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
1582
@dbus_service_property(_interface,
1583
signature="t",
1365
1584
access="readwrite")
1366
1585
def Timeout_dbus_property(self, value=None):
1367
1586
if value is None: # get
1368
return dbus.UInt64(self.timeout_milliseconds())
1587
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
old_timeout = self.timeout
1369
1589
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
1590
# Reschedule disabling
1371
1591
if self.enabled:
1372
1592
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1593
self.expires += self.timeout - old_timeout
1594
if self.expires <= now:
1376
1595
# The timeout has passed
1377
1596
self.disable()
1378
1597
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
1598
if (getattr(self, "disable_initiator_tag", None)
1383
1599
is None):
1384
1600
return
1385
1601
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1602
self.disable_initiator_tag = gobject.timeout_add(
1603
int((self.expires - now).total_seconds() * 1000),
1604
self.disable)
1389
1605
1390
1606
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
1607
@dbus_service_property(_interface,
1608
signature="t",
1392
1609
access="readwrite")
1393
1610
def ExtendedTimeout_dbus_property(self, value=None):
1394
1611
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
1612
return dbus.UInt64(self.extended_timeout.total_seconds()
1613
* 1000)
1396
1614
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
1615
1398
1616
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
1617
@dbus_service_property(_interface,
1618
signature="t",
1400
1619
access="readwrite")
1401
1620
def Interval_dbus_property(self, value=None):
1402
1621
if value is None: # get
1403
return dbus.UInt64(self.interval_milliseconds())
1622
return dbus.UInt64(self.interval.total_seconds() * 1000)
1404
1623
self.interval = datetime.timedelta(0, 0, 0, value)
1405
1624
if getattr(self, "checker_initiator_tag", None) is None:
1406
1625
return
1407
1626
if self.enabled:
1408
1627
# Reschedule checker run
1409
1628
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1629
self.checker_initiator_tag = gobject.timeout_add(
1630
value, self.start_checker)
1631
self.start_checker() # Start one now, too
1413
1632
1414
1633
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
1634
@dbus_service_property(_interface,
1635
signature="s",
1416
1636
access="readwrite")
1417
1637
def Checker_dbus_property(self, value=None):
1418
1638
if value is None: # get
1419
1639
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
1640
self.checker_command = str(value)
1421
1641
1422
1642
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
1643
@dbus_service_property(_interface,
1644
signature="b",
1424
1645
access="readwrite")
1425
1646
def CheckerRunning_dbus_property(self, value=None):
1426
1647
if value is None: # get
1436
1657
return self.dbus_object_path # is already a dbus.ObjectPath
1437
1658
1438
1659
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
1660
@dbus_service_property(_interface,
1661
signature="ay",
1662
access="write",
1663
byte_arrays=True)
1441
1664
def Secret_dbus_property(self, value):
1442
self.secret = str(value)
1665
self.secret = bytes(value)
1443
1666
1444
1667
del _interface
1445
1668
1449
1672
self._pipe = child_pipe
1450
1673
self._pipe.send(('init', fpr, address))
1451
1674
if not self._pipe.recv():
1452
raise KeyError()
1675
raise KeyError(fpr)
1453
1676
1454
1677
def __getattribute__(self, name):
1455
1678
if name == '_pipe':
1459
1682
if data[0] == 'data':
1460
1683
return data[1]
1461
1684
if data[0] == 'function':
1685
1462
1686
def func(*args, **kwargs):
1463
1687
self._pipe.send(('funcall', name, args, kwargs))
1464
1688
return self._pipe.recv()[1]
1689
1465
1690
return func
1466
1691
1467
1692
def __setattr__(self, name, value):
1470
1695
self._pipe.send(('setattr', name, value))
1471
1696
1472
1697
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
1477
1698
class ClientHandler(socketserver.BaseRequestHandler, object):
1478
1699
"""A class to handle client connections.
1479
1700
1483
1704
def handle(self):
1484
1705
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
1706
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
1707
str(self.client_address))
1487
1708
logger.debug("Pipe FD: %d",
1488
1709
self.server.child_pipe.fileno())
1489
1710
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1711
session = gnutls.connection.ClientSession(
1712
self.request, gnutls.connection .X509Credentials())
1494
1713
1495
1714
# Note: gnutls.connection.X509Credentials is really a
1496
1715
# generic GnuTLS certificate credentials object so long as
1505
1724
priority = self.server.gnutls_priority
1506
1725
if priority is None:
1507
1726
priority = "NORMAL"
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
1727
gnutls.library.functions.gnutls_priority_set_direct(
1728
session._c_object, priority, None)
1511
1729
1512
1730
# Start communication using the Mandos protocol
1513
1731
# Get protocol number
1515
1733
logger.debug("Protocol version: %r", line)
1516
1734
try:
1517
1735
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
1736
raise RuntimeError(line)
1519
1737
except (ValueError, IndexError, RuntimeError) as error:
1520
1738
logger.error("Unknown protocol version: %s", error)
1521
1739
return
1533
1751
approval_required = False
1534
1752
try:
1535
1753
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1754
fpr = self.fingerprint(
1755
self.peer_certificate(session))
1538
1756
except (TypeError,
1539
1757
gnutls.errors.GNUTLSError) as error:
1540
1758
logger.warning("Bad certificate: %s", error)
1547
1765
except KeyError:
1548
1766
return
1549
1767
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
1554
1768
if client.approval_delay:
1555
1769
delay = client.approval_delay
1556
1770
client.approvals_pending += 1
1559
1773
while True:
1560
1774
if not client.enabled:
1561
1775
logger.info("Client %s is disabled",
1562
client.name)
1776
client.name)
1563
1777
if self.server.use_dbus:
1564
1778
# Emit D-Bus signal
1565
1779
client.Rejected("Disabled")
1574
1788
if self.server.use_dbus:
1575
1789
# Emit D-Bus signal
1576
1790
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
1791
client.approval_delay.total_seconds()
1792
* 1000, client.approved_by_default)
1579
1793
else:
1580
1794
logger.warning("Client %s was not approved",
1581
1795
client.name)
1587
1801
#wait until timeout or approved
1588
1802
time = datetime.datetime.now()
1589
1803
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
1804
client.changedstate.wait(delay.total_seconds())
1593
1805
client.changedstate.release()
1594
1806
time2 = datetime.datetime.now()
1595
1807
if (time2 - time) >= delay:
1611
1823
try:
1612
1824
sent = session.send(client.secret[sent_size:])
1613
1825
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1826
logger.warning("gnutls send failed",
1827
exc_info=error)
1615
1828
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1829
logger.debug("Sent: %d, remaining: %d", sent,
1830
len(client.secret) - (sent_size
1831
+ sent))
1619
1832
sent_size += sent
1620
1833
1621
1834
logger.info("Sending secret to %s", client.name)
1622
1835
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
1836
client.bump_timeout(client.extended_timeout)
1624
1837
if self.server.use_dbus:
1625
1838
# Emit D-Bus signal
1626
1839
client.GotSecret()
1631
1844
try:
1632
1845
session.bye()
1633
1846
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1847
logger.warning("GnuTLS bye failed",
1848
exc_info=error)
1635
1849
1636
1850
@staticmethod
1637
1851
def peer_certificate(session):
1638
1852
"Return the peer's OpenPGP certificate as a bytestring"
1639
1853
# If not an OpenPGP certificate...
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1854
if (gnutls.library.functions.gnutls_certificate_type_get(
1855
session._c_object)
1642
1856
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
1857
# ...do the normal thing
1644
1858
return session.peer_certificate
1658
1872
def fingerprint(openpgp):
1659
1873
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1660
1874
# New GnuTLS "datum" with the OpenPGP public key
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
ctypes.c_uint(len(openpgp))))
1875
datum = gnutls.library.types.gnutls_datum_t(
1876
ctypes.cast(ctypes.c_char_p(openpgp),
1877
ctypes.POINTER(ctypes.c_ubyte)),
1878
ctypes.c_uint(len(openpgp)))
1666
1879
# New empty GnuTLS certificate
1667
1880
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1881
gnutls.library.functions.gnutls_openpgp_crt_init(
1882
ctypes.byref(crt))
1670
1883
# Import the OpenPGP public key into the certificate
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
1884
gnutls.library.functions.gnutls_openpgp_crt_import(
1885
crt, ctypes.byref(datum),
1886
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1675
1887
# Verify the self signature in the key
1676
1888
crtverify = ctypes.c_uint()
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
1889
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
crt, 0, ctypes.byref(crtverify))
1680
1891
if crtverify.value != 0:
1681
1892
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
1893
raise gnutls.errors.CertificateSecurityError(
1894
"Verify failed")
1684
1895
# New buffer for the fingerprint
1685
1896
buf = ctypes.create_string_buffer(20)
1686
1897
buf_len = ctypes.c_size_t()
1687
1898
# Get the fingerprint from the certificate into the buffer
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
1899
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1900
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1691
1901
# Deinit the certificate
1692
1902
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1693
1903
# Convert the buffer to a Python bytestring
1699
1909
1700
1910
class MultiprocessingMixIn(object):
1701
1911
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1912
1702
1913
def sub_process_main(self, request, address):
1703
1914
try:
1704
1915
self.finish_request(request, address)
1709
1920
def process_request(self, request, address):
1710
1921
"""Start a new process to process the request."""
1711
1922
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
1923
args = (request, address))
1714
1924
proc.start()
1715
1925
return proc
1716
1926
1717
1927
1718
1928
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
1929
""" adds a pipe to the MixIn """
1930
1720
1931
def process_request(self, request, client_address):
1721
1932
"""Overrides and wraps the original process_request().
1722
1933
1731
1942
1732
1943
def add_pipe(self, parent_pipe, proc):
1733
1944
"""Dummy function; override as necessary"""
1734
raise NotImplementedError
1945
raise NotImplementedError()
1735
1946
1736
1947
1737
1948
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1743
1954
interface: None or a network interface name (string)
1744
1955
use_ipv6: Boolean; to use IPv6 or not
1745
1956
"""
1957
1746
1958
def __init__(self, server_address, RequestHandlerClass,
1747
interface=None, use_ipv6=True):
1959
interface=None,
1960
use_ipv6=True,
1961
socketfd=None):
1962
"""If socketfd is set, use that file descriptor instead of
1963
creating a new one with socket.socket().
1964
"""
1748
1965
self.interface = interface
1749
1966
if use_ipv6:
1750
1967
self.address_family = socket.AF_INET6
1968
if socketfd is not None:
1969
# Save the file descriptor
1970
self.socketfd = socketfd
1971
# Save the original socket.socket() function
1972
self.socket_socket = socket.socket
1973
# To implement --socket, we monkey patch socket.socket.
1974
#
1975
# (When socketserver.TCPServer is a new-style class, we
1976
# could make self.socket into a property instead of monkey
1977
# patching socket.socket.)
1978
#
1979
# Create a one-time-only replacement for socket.socket()
1980
@functools.wraps(socket.socket)
1981
def socket_wrapper(*args, **kwargs):
1982
# Restore original function so subsequent calls are
1983
# not affected.
1984
socket.socket = self.socket_socket
1985
del self.socket_socket
1986
# This time only, return a new socket object from the
1987
# saved file descriptor.
1988
return socket.fromfd(self.socketfd, *args, **kwargs)
1989
# Replace socket.socket() function with wrapper
1990
socket.socket = socket_wrapper
1991
# The socketserver.TCPServer.__init__ will call
1992
# socket.socket(), which might be our replacement,
1993
# socket_wrapper(), if socketfd was set.
1751
1994
socketserver.TCPServer.__init__(self, server_address,
1752
1995
RequestHandlerClass)
1996
1753
1997
def server_bind(self):
1754
1998
"""This overrides the normal server_bind() function
1755
1999
to bind to an interface if one was specified, and also NOT to
1761
2005
self.interface)
1762
2006
else:
1763
2007
try:
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
2008
self.socket.setsockopt(
2009
socket.SOL_SOCKET, SO_BINDTODEVICE,
2010
(self.interface + "\0").encode("utf-8"))
1768
2011
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
elif error[0] == errno.ENOPROTOOPT:
2012
if error.errno == errno.EPERM:
2013
logger.error("No permission to bind to"
2014
" interface %s", self.interface)
2015
elif error.errno == errno.ENOPROTOOPT:
1774
2016
logger.error("SO_BINDTODEVICE not available;"
1775
2017
" cannot bind to interface %s",
1776
2018
self.interface)
2019
elif error.errno == errno.ENODEV:
2020
logger.error("Interface %s does not exist,"
2021
" cannot bind", self.interface)
1777
2022
else:
1778
2023
raise
1779
2024
# Only bind(2) the socket if we really need to.
1782
2027
if self.address_family == socket.AF_INET6:
1783
2028
any_address = "::" # in6addr_any
1784
2029
else:
1785
any_address = socket.INADDR_ANY
2030
any_address = "0.0.0.0" # INADDR_ANY
1786
2031
self.server_address = (any_address,
1787
2032
self.server_address[1])
1788
2033
elif not self.server_address[1]:
1789
self.server_address = (self.server_address[0],
1790
0)
2034
self.server_address = (self.server_address[0], 0)
1791
2035
# if self.interface:
1792
2036
# self.server_address = (self.server_address[0],
1793
2037
# 0, # port
1807
2051
1808
2052
Assumes a gobject.MainLoop event loop.
1809
2053
"""
2054
1810
2055
def __init__(self, server_address, RequestHandlerClass,
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
2056
interface=None,
2057
use_ipv6=True,
2058
clients=None,
2059
gnutls_priority=None,
2060
use_dbus=True,
2061
socketfd=None):
1813
2062
self.enabled = False
1814
2063
self.clients = clients
1815
2064
if self.clients is None:
1819
2068
IPv6_TCPServer.__init__(self, server_address,
1820
2069
RequestHandlerClass,
1821
2070
interface = interface,
1822
use_ipv6 = use_ipv6)
2071
use_ipv6 = use_ipv6,
2072
socketfd = socketfd)
2073
1823
2074
def server_activate(self):
1824
2075
if self.enabled:
1825
2076
return socketserver.TCPServer.server_activate(self)
1829
2080
1830
2081
def add_pipe(self, parent_pipe, proc):
1831
2082
# Call "handle_ipc" for both data and EOF events
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
2083
gobject.io_add_watch(
2084
parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2087
parent_pipe = parent_pipe,
2088
proc = proc))
1838
2089
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
2090
def handle_ipc(self, source, condition,
2091
parent_pipe=None,
2092
proc = None,
2093
client_object=None):
1855
2094
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2095
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1857
2096
# Wait for other process to exit
1858
2097
proc.join()
1859
2098
return False
1880
2119
parent_pipe.send(False)
1881
2120
return False
1882
2121
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
2122
gobject.io_add_watch(
2123
parent_pipe.fileno(),
2124
gobject.IO_IN | gobject.IO_HUP,
2125
functools.partial(self.handle_ipc,
2126
parent_pipe = parent_pipe,
2127
proc = proc,
2128
client_object = client))
1891
2129
parent_pipe.send(True)
1892
2130
# remove the old hook in favor of the new above hook on
1893
2131
# same fileno
1899
2137
1900
2138
parent_pipe.send(('data', getattr(client_object,
1901
2139
funcname)(*args,
1902
**kwargs)))
2140
**kwargs)))
1903
2141
1904
2142
if command == 'getattr':
1905
2143
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
2144
if isinstance(client_object.__getattribute__(attrname),
2145
collections.Callable):
2146
parent_pipe.send(('function', ))
1908
2147
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
2148
parent_pipe.send((
2149
'data', client_object.__getattribute__(attrname)))
1911
2150
1912
2151
if command == 'setattr':
1913
2152
attrname = request[1]
1917
2156
return True
1918
2157
1919
2158
2159
def rfc3339_duration_to_delta(duration):
2160
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2161
2162
>>> rfc3339_duration_to_delta("P7D")
2163
datetime.timedelta(7)
2164
>>> rfc3339_duration_to_delta("PT60S")
2165
datetime.timedelta(0, 60)
2166
>>> rfc3339_duration_to_delta("PT60M")
2167
datetime.timedelta(0, 3600)
2168
>>> rfc3339_duration_to_delta("PT24H")
2169
datetime.timedelta(1)
2170
>>> rfc3339_duration_to_delta("P1W")
2171
datetime.timedelta(7)
2172
>>> rfc3339_duration_to_delta("PT5M30S")
2173
datetime.timedelta(0, 330)
2174
>>> rfc3339_duration_to_delta("P1DT3M20S")
2175
datetime.timedelta(1, 200)
2176
"""
2177
2178
# Parsing an RFC 3339 duration with regular expressions is not
2179
# possible - there would have to be multiple places for the same
2180
# values, like seconds. The current code, while more esoteric, is
2181
# cleaner without depending on a parsing library. If Python had a
2182
# built-in library for parsing we would use it, but we'd like to
2183
# avoid excessive use of external libraries.
2184
2185
# New type for defining tokens, syntax, and semantics all-in-one
2186
Token = collections.namedtuple("Token", (
2187
"regexp", # To match token; if "value" is not None, must have
2188
# a "group" containing digits
2189
"value", # datetime.timedelta or None
2190
"followers")) # Tokens valid after this token
2191
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2192
# the "duration" ABNF definition in RFC 3339, Appendix A.
2193
token_end = Token(re.compile(r"$"), None, frozenset())
2194
token_second = Token(re.compile(r"(\d+)S"),
2195
datetime.timedelta(seconds=1),
2196
frozenset((token_end, )))
2197
token_minute = Token(re.compile(r"(\d+)M"),
2198
datetime.timedelta(minutes=1),
2199
frozenset((token_second, token_end)))
2200
token_hour = Token(re.compile(r"(\d+)H"),
2201
datetime.timedelta(hours=1),
2202
frozenset((token_minute, token_end)))
2203
token_time = Token(re.compile(r"T"),
2204
None,
2205
frozenset((token_hour, token_minute,
2206
token_second)))
2207
token_day = Token(re.compile(r"(\d+)D"),
2208
datetime.timedelta(days=1),
2209
frozenset((token_time, token_end)))
2210
token_month = Token(re.compile(r"(\d+)M"),
2211
datetime.timedelta(weeks=4),
2212
frozenset((token_day, token_end)))
2213
token_year = Token(re.compile(r"(\d+)Y"),
2214
datetime.timedelta(weeks=52),
2215
frozenset((token_month, token_end)))
2216
token_week = Token(re.compile(r"(\d+)W"),
2217
datetime.timedelta(weeks=1),
2218
frozenset((token_end, )))
2219
token_duration = Token(re.compile(r"P"), None,
2220
frozenset((token_year, token_month,
2221
token_day, token_time,
2222
token_week)))
2223
# Define starting values
2224
value = datetime.timedelta() # Value so far
2225
found_token = None
2226
followers = frozenset((token_duration, )) # Following valid tokens
2227
s = duration # String left to parse
2228
# Loop until end token is found
2229
while found_token is not token_end:
2230
# Search for any currently valid tokens
2231
for token in followers:
2232
match = token.regexp.match(s)
2233
if match is not None:
2234
# Token found
2235
if token.value is not None:
2236
# Value found, parse digits
2237
factor = int(match.group(1), 10)
2238
# Add to value so far
2239
value += factor * token.value
2240
# Strip token from string
2241
s = token.regexp.sub("", s, 1)
2242
# Go to found token
2243
found_token = token
2244
# Set valid next tokens
2245
followers = found_token.followers
2246
break
2247
else:
2248
# No currently valid tokens were found
2249
raise ValueError("Invalid RFC 3339 duration: {!r}"
2250
.format(duration))
2251
# End token found
2252
return value
2253
2254
1920
2255
def string_to_delta(interval):
1921
2256
"""Parse a string and return a datetime.timedelta
1922
2257
1933
2268
>>> string_to_delta('5m 30s')
1934
2269
datetime.timedelta(0, 330)
1935
2270
"""
2271
2272
try:
2273
return rfc3339_duration_to_delta(interval)
2274
except ValueError:
2275
pass
2276
1936
2277
timevalue = datetime.timedelta(0)
1937
2278
for s in interval.split():
1938
2279
try:
1939
suffix = unicode(s[-1])
2280
suffix = s[-1]
1940
2281
value = int(s[:-1])
1941
2282
if suffix == "d":
1942
2283
delta = datetime.timedelta(value)
1949
2290
elif suffix == "w":
1950
2291
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1951
2292
else:
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
2293
raise ValueError("Unknown suffix {!r}".format(suffix))
2294
except IndexError as e:
1954
2295
raise ValueError(*(e.args))
1955
2296
timevalue += delta
1956
2297
return timevalue
1969
2310
sys.exit()
1970
2311
if not noclose:
1971
2312
# Close all standard open file descriptors
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2313
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1973
2314
if not stat.S_ISCHR(os.fstat(null).st_mode):
1974
2315
raise OSError(errno.ENODEV,
1975
"%s not a character device"
1976
% os.path.devnull)
2316
"{} not a character device"
2317
.format(os.devnull))
1977
2318
os.dup2(null, sys.stdin.fileno())
1978
2319
os.dup2(null, sys.stdout.fileno())
1979
2320
os.dup2(null, sys.stderr.fileno())
1988
2329
1989
2330
parser = argparse.ArgumentParser()
1990
2331
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
2332
version = "%(prog)s {}".format(version),
1992
2333
help="show version number and exit")
1993
2334
parser.add_argument("-i", "--interface", metavar="IF",
1994
2335
help="Bind to interface IF")
2000
2341
help="Run self-test")
2001
2342
parser.add_argument("--debug", action="store_true",
2002
2343
help="Debug mode; run in foreground and log"
2003
" to terminal")
2344
" to terminal", default=None)
2004
2345
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
2346
help="Debug level for stdout output")
2006
2347
parser.add_argument("--priority", help="GnuTLS"
2013
2354
" files")
2014
2355
parser.add_argument("--no-dbus", action="store_false",
2015
2356
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2357
" system bus interface", default=None)
2017
2358
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2359
dest="use_ipv6", help="Do not use IPv6",
2360
default=None)
2019
2361
parser.add_argument("--no-restore", action="store_false",
2020
2362
dest="restore", help="Do not restore stored"
2021
" state")
2363
" state", default=None)
2364
parser.add_argument("--socket", type=int,
2365
help="Specify a file descriptor to a network"
2366
" socket to use instead of creating one")
2022
2367
parser.add_argument("--statedir", metavar="DIR",
2023
2368
help="Directory to save/restore state in")
2369
parser.add_argument("--foreground", action="store_true",
2370
help="Run in foreground", default=None)
2371
parser.add_argument("--no-zeroconf", action="store_false",
2372
dest="zeroconf", help="Do not use Zeroconf",
2373
default=None)
2024
2374
2025
2375
options = parser.parse_args()
2026
2376
2027
2377
if options.check:
2028
2378
import doctest
2029
doctest.testmod()
2030
sys.exit()
2379
fail_count, test_count = doctest.testmod()
2380
sys.exit(os.EX_OK if fail_count == 0 else 1)
2031
2381
2032
2382
# Default values for config file for server-global settings
2033
2383
server_defaults = { "interface": "",
2035
2385
"port": "",
2036
2386
"debug": "False",
2037
2387
"priority":
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2388
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2389
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2039
2390
"servicename": "Mandos",
2040
2391
"use_dbus": "True",
2041
2392
"use_ipv6": "True",
2042
2393
"debuglevel": "",
2043
2394
"restore": "True",
2044
"statedir": "/var/lib/mandos"
2045
}
2395
"socket": "",
2396
"statedir": "/var/lib/mandos",
2397
"foreground": "False",
2398
"zeroconf": "True",
2399
}
2046
2400
2047
2401
# Parse config file for server-global settings
2048
2402
server_config = configparser.SafeConfigParser(server_defaults)
2049
2403
del server_defaults
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
2404
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2052
2405
# Convert the SafeConfigParser object to a dict
2053
2406
server_settings = server_config.defaults()
2054
2407
# Use the appropriate methods on the non-string config options
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2408
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2056
2409
server_settings[option] = server_config.getboolean("DEFAULT",
2057
2410
option)
2058
2411
if server_settings["port"]:
2059
2412
server_settings["port"] = server_config.getint("DEFAULT",
2060
2413
"port")
2414
if server_settings["socket"]:
2415
server_settings["socket"] = server_config.getint("DEFAULT",
2416
"socket")
2417
# Later, stdin will, and stdout and stderr might, be dup'ed
2418
# over with an opened os.devnull. But we don't want this to
2419
# happen with a supplied network socket.
2420
if 0 <= server_settings["socket"] <= 2:
2421
server_settings["socket"] = os.dup(server_settings
2422
["socket"])
2061
2423
del server_config
2062
2424
2063
2425
# Override the settings from the config file with command line
2064
2426
# options, if set.
2065
2427
for option in ("interface", "address", "port", "debug",
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
2428
"priority", "servicename", "configdir", "use_dbus",
2429
"use_ipv6", "debuglevel", "restore", "statedir",
2430
"socket", "foreground", "zeroconf"):
2069
2431
value = getattr(options, option)
2070
2432
if value is not None:
2071
2433
server_settings[option] = value
2072
2434
del options
2073
2435
# Force all strings to be unicode
2074
2436
for option in server_settings.keys():
2075
if type(server_settings[option]) is str:
2076
server_settings[option] = unicode(server_settings[option])
2437
if isinstance(server_settings[option], bytes):
2438
server_settings[option] = (server_settings[option]
2439
.decode("utf-8"))
2440
# Force all boolean options to be boolean
2441
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2442
"foreground", "zeroconf"):
2443
server_settings[option] = bool(server_settings[option])
2444
# Debug implies foreground
2445
if server_settings["debug"]:
2446
server_settings["foreground"] = True
2077
2447
# Now we have our good server settings in "server_settings"
2078
2448
2079
2449
##################################################################
2080
2450
2451
if (not server_settings["zeroconf"]
2452
and not (server_settings["port"]
2453
or server_settings["socket"] != "")):
2454
parser.error("Needs port or socket to work without Zeroconf")
2455
2081
2456
# For convenience
2082
2457
debug = server_settings["debug"]
2083
2458
debuglevel = server_settings["debuglevel"]
2085
2460
use_ipv6 = server_settings["use_ipv6"]
2086
2461
stored_state_path = os.path.join(server_settings["statedir"],
2087
2462
stored_state_file)
2463
foreground = server_settings["foreground"]
2464
zeroconf = server_settings["zeroconf"]
2088
2465
2089
2466
if debug:
2090
2467
initlogger(debug, logging.DEBUG)
2096
2473
initlogger(debug, level)
2097
2474
2098
2475
if server_settings["servicename"] != "Mandos":
2099
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
2476
syslogger.setFormatter(
2477
logging.Formatter('Mandos ({}) [%(process)d]:'
2478
' %(levelname)s: %(message)s'.format(
2479
server_settings["servicename"])))
2103
2480
2104
2481
# Parse config file with clients
2105
2482
client_config = configparser.SafeConfigParser(Client
2110
2487
global mandos_dbus_service
2111
2488
mandos_dbus_service = None
2112
2489
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2490
socketfd = None
2491
if server_settings["socket"] != "":
2492
socketfd = server_settings["socket"]
2493
tcp_server = MandosServer(
2494
(server_settings["address"], server_settings["port"]),
2495
ClientHandler,
2496
interface=(server_settings["interface"] or None),
2497
use_ipv6=use_ipv6,
2498
gnutls_priority=server_settings["priority"],
2499
use_dbus=use_dbus,
2500
socketfd=socketfd)
2501
if not foreground:
2502
pidfilename = "/run/mandos.pid"
2503
if not os.path.isdir("/run/."):
2504
pidfilename = "/var/run/mandos.pid"
2505
pidfile = None
2124
2506
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
2507
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2508
except IOError as e:
2509
logger.error("Could not open file %r", pidfilename,
2510
exc_info=e)
2128
2511
2129
try:
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
2132
except KeyError:
2512
for name in ("_mandos", "mandos", "nobody"):
2133
2513
try:
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
2514
uid = pwd.getpwnam(name).pw_uid
2515
gid = pwd.getpwnam(name).pw_gid
2516
break
2136
2517
except KeyError:
2137
try:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
2140
except KeyError:
2141
uid = 65534
2142
gid = 65534
2518
continue
2519
else:
2520
uid = 65534
2521
gid = 65534
2143
2522
try:
2144
2523
os.setgid(gid)
2145
2524
os.setuid(uid)
2146
2525
except OSError as error:
2147
if error[0] != errno.EPERM:
2148
raise error
2526
if error.errno != errno.EPERM:
2527
raise
2149
2528
2150
2529
if debug:
2151
2530
# Enable all possible GnuTLS debugging
2158
2537
def debug_gnutls(level, string):
2159
2538
logger.debug("GnuTLS: %s", string[:-1])
2160
2539
2161
(gnutls.library.functions
2162
.gnutls_global_set_log_function(debug_gnutls))
2540
gnutls.library.functions.gnutls_global_set_log_function(
2541
debug_gnutls)
2163
2542
2164
2543
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2544
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2166
2545
os.dup2(null, sys.stdin.fileno())
2167
2546
if null > 2:
2168
2547
os.close(null)
2169
2548
2170
2549
# Need to fork before connecting to D-Bus
2171
if not debug:
2550
if not foreground:
2172
2551
# Close all input and output, do double fork, etc.
2173
2552
daemon()
2174
2553
2554
# multiprocessing will use threads, so before we use gobject we
2555
# need to inform gobject that threads will be used.
2175
2556
gobject.threads_init()
2176
2557
2177
2558
global main_loop
2178
2559
# From the Avahi example code
2179
DBusGMainLoop(set_as_default=True )
2560
DBusGMainLoop(set_as_default=True)
2180
2561
main_loop = gobject.MainLoop()
2181
2562
bus = dbus.SystemBus()
2182
2563
# End of Avahi example code
2183
2564
if use_dbus:
2184
2565
try:
2185
2566
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2567
bus,
2568
do_not_queue=True)
2569
old_bus_name = dbus.service.BusName(
2570
"se.bsnet.fukt.Mandos", bus,
2571
do_not_queue=True)
2572
except dbus.exceptions.DBusException as e:
2573
logger.error("Disabling D-Bus:", exc_info=e)
2192
2574
use_dbus = False
2193
2575
server_settings["use_dbus"] = False
2194
2576
tcp_server.use_dbus = False
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2577
if zeroconf:
2578
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2579
service = AvahiServiceToSyslog(
2580
name = server_settings["servicename"],
2581
servicetype = "_mandos._tcp",
2582
protocol = protocol,
2583
bus = bus)
2584
if server_settings["interface"]:
2585
service.interface = if_nametoindex(
2586
server_settings["interface"].encode("utf-8"))
2203
2587
2204
2588
global multiprocessing_manager
2205
2589
multiprocessing_manager = multiprocessing.Manager()
2206
2590
2207
2591
client_class = Client
2208
2592
if use_dbus:
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2593
client_class = functools.partial(ClientDBus, bus = bus)
2211
2594
2212
2595
client_settings = Client.config_parser(client_config)
2213
2596
old_client_settings = {}
2214
2597
clients_data = {}
2215
2598
2599
# This is used to redirect stdout and stderr for checker processes
2600
global wnull
2601
wnull = open(os.devnull, "w") # A writable /dev/null
2602
# Only used if server is running in foreground but not in debug
2603
# mode
2604
if debug or not foreground:
2605
wnull.close()
2606
2216
2607
# Get client data and settings from last running state.
2217
2608
if server_settings["restore"]:
2218
2609
try:
2219
2610
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
2611
clients_data, old_client_settings = pickle.load(
2612
stored_state)
2222
2613
os.remove(stored_state_path)
2223
2614
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
2615
if e.errno == errno.ENOENT:
2616
logger.warning("Could not load persistent state:"
2617
" {}".format(os.strerror(e.errno)))
2618
else:
2619
logger.critical("Could not load persistent state:",
2620
exc_info=e)
2227
2621
raise
2228
2622
except EOFError as e:
2229
2623
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2624
"EOFError:",
2625
exc_info=e)
2231
2626
2232
2627
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
2628
for client_name, client in clients_data.items():
2629
# Skip removed clients
2630
if client_name not in client_settings:
2631
continue
2632
2234
2633
# Decide which value to use after restoring saved state.
2235
2634
# We have three different values: Old config file,
2236
2635
# new config file, and saved state.
2241
2640
# For each value in new config, check if it
2242
2641
# differs from the old config value (Except for
2243
2642
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
2643
if (name != "secret"
2644
and (value !=
2645
old_client_settings[client_name][name])):
2247
2646
client[name] = value
2248
2647
except KeyError:
2249
2648
pass
2250
2649
2251
2650
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2651
# enabled if its last checker was successful. A Client
2652
# whose checker succeeded before we stored its state is
2653
# assumed to have successfully run all checkers during
2654
# downtime.
2255
2655
if client["enabled"]:
2256
2656
if datetime.datetime.utcnow() >= client["expires"]:
2257
2657
if not client["last_checked_ok"]:
2258
2658
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2659
"disabling client {} - Client never "
2660
"performed a successful checker".format(
2661
client_name))
2262
2662
client["enabled"] = False
2263
2663
elif client["last_checker_status"] != 0:
2264
2664
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
2665
"disabling client {} - Client last"
2666
" checker failed with error code"
2667
" {}".format(
2668
client_name,
2669
client["last_checker_status"]))
2269
2670
client["enabled"] = False
2270
2671
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
2672
client["expires"] = (
2673
datetime.datetime.utcnow()
2674
+ client["timeout"])
2274
2675
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
2676
" keeping {} enabled".format(
2677
client_name))
2277
2678
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
2679
client["secret"] = pgp.decrypt(
2680
client["encrypted_secret"],
2681
client_settings[client_name]["secret"])
2282
2682
except PGPError:
2283
2683
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
2684
logger.debug("Failed to decrypt {} old secret".format(
2685
client_name))
2686
client["secret"] = (client_settings[client_name]
2687
["secret"])
2289
2688
2290
2689
# Add/remove clients based on new changes made to config
2291
2690
for client_name in (set(old_client_settings)
2294
2693
for client_name in (set(client_settings)
2295
2694
- set(old_client_settings)):
2296
2695
clients_data[client_name] = client_settings[client_name]
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
2696
2697
# Create all client objects
2698
for client_name, client in clients_data.items():
2300
2699
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2700
name = client_name,
2701
settings = client,
2702
server_settings = server_settings)
2302
2703
2303
2704
if not tcp_server.clients:
2304
2705
logger.warning("No clients defined")
2305
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
2706
2707
if not foreground:
2708
if pidfile is not None:
2709
pid = os.getpid()
2710
try:
2711
with pidfile:
2712
print(pid, file=pidfile)
2713
except IOError:
2714
logger.error("Could not write to file %r with PID %d",
2715
pidfilename, pid)
2716
del pidfile
2318
2717
del pidfilename
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
2718
2321
2719
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
2720
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2323
2721
2324
2722
if use_dbus:
2325
class MandosDBusService(dbus.service.Object):
2723
2724
@alternate_dbus_interfaces(
2725
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2726
class MandosDBusService(DBusObjectWithProperties):
2326
2727
"""A D-Bus proxy object"""
2728
2327
2729
def __init__(self):
2328
2730
dbus.service.Object.__init__(self, bus, "/")
2731
2329
2732
_interface = "se.recompile.Mandos"
2330
2733
2734
@dbus_interface_annotations(_interface)
2735
def _foo(self):
2736
return {
2737
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2738
"false" }
2739
2331
2740
@dbus.service.signal(_interface, signature="o")
2332
2741
def ClientAdded(self, objpath):
2333
2742
"D-Bus signal"
2346
2755
@dbus.service.method(_interface, out_signature="ao")
2347
2756
def GetAllClients(self):
2348
2757
"D-Bus method"
2349
return dbus.Array(c.dbus_object_path
2350
for c in
2758
return dbus.Array(c.dbus_object_path for c in
2351
2759
tcp_server.clients.itervalues())
2352
2760
2353
2761
@dbus.service.method(_interface,
2355
2763
def GetAllClientsWithProperties(self):
2356
2764
"D-Bus method"
2357
2765
return dbus.Dictionary(
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
2766
{ c.dbus_object_path: c.GetAll("")
2767
for c in tcp_server.clients.itervalues() },
2360
2768
signature="oa{sv}")
2361
2769
2362
2770
@dbus.service.method(_interface, in_signature="o")
2375
2783
2376
2784
del _interface
2377
2785
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2786
mandos_dbus_service = MandosDBusService()
2381
2787
2382
2788
def cleanup():
2383
2789
"Cleanup function; run on exit"
2384
service.cleanup()
2790
if zeroconf:
2791
service.cleanup()
2385
2792
2386
2793
multiprocessing.active_children()
2794
wnull.close()
2387
2795
if not (tcp_server.clients or client_settings):
2388
2796
return
2389
2797
2400
2808
2401
2809
# A list of attributes that can not be pickled
2402
2810
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
2811
exclude = { "bus", "changedstate", "secret",
2812
"checker", "server_settings" }
2813
for name, typ in inspect.getmembers(dbus.service
2814
.Object):
2407
2815
exclude.add(name)
2408
2816
2409
2817
client_dict["encrypted_secret"] = (client
2416
2824
del client_settings[client.name]["secret"]
2417
2825
2418
2826
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2827
with tempfile.NamedTemporaryFile(
2828
mode='wb',
2829
suffix=".pickle",
2830
prefix='clients-',
2831
dir=os.path.dirname(stored_state_path),
2832
delete=False) as stored_state:
2424
2833
pickle.dump((clients, client_settings), stored_state)
2834
tempname = stored_state.name
2425
2835
os.rename(tempname, stored_state_path)
2426
2836
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
2837
if not debug:
2430
2838
try:
2431
2839
os.remove(tempname)
2432
2840
except NameError:
2433
2841
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2842
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2843
logger.warning("Could not save persistent state: {}"
2844
.format(os.strerror(e.errno)))
2845
else:
2846
logger.warning("Could not save persistent state:",
2847
exc_info=e)
2848
raise
2437
2849
2438
2850
# Delete all clients, and settings from config
2439
2851
while tcp_server.clients:
2444
2856
client.disable(quiet=True)
2445
2857
if use_dbus:
2446
2858
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
2859
mandos_dbus_service.ClientRemoved(
2860
client.dbus_object_path, client.name)
2450
2861
client_settings.clear()
2451
2862
2452
2863
atexit.register(cleanup)
2463
2874
tcp_server.server_activate()
2464
2875
2465
2876
# Find out what port we got
2466
service.port = tcp_server.socket.getsockname()[1]
2877
if zeroconf:
2878
service.port = tcp_server.socket.getsockname()[1]
2467
2879
if use_ipv6:
2468
2880
logger.info("Now listening on address %r, port %d,"
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
2881
" flowinfo %d, scope_id %d",
2882
*tcp_server.socket.getsockname())
2471
2883
else: # IPv4
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
2884
logger.info("Now listening on address %r, port %d",
2885
*tcp_server.socket.getsockname())
2474
2886
2475
2887
#service.interface = tcp_server.socket.getsockname()[3]
2476
2888
2477
2889
try:
2478
# From the Avahi example code
2479
try:
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
2484
sys.exit(1)
2485
# End of Avahi example code
2890
if zeroconf:
2891
# From the Avahi example code
2892
try:
2893
service.activate()
2894
except dbus.exceptions.DBusException as error:
2895
logger.critical("D-Bus Exception", exc_info=error)
2896
cleanup()
2897
sys.exit(1)
2898
# End of Avahi example code
2486
2899
2487
2900
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2488
2901
lambda *args, **kwargs:
2492
2905
logger.debug("Starting main loop")
2493
2906
main_loop.run()
2494
2907
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
2908
logger.critical("Avahi Error", exc_info=error)
2496
2909
cleanup()
2497
2910
sys.exit(1)
2498
2911
except KeyboardInterrupt:
2503
2916
# Must run before the D-Bus bus name gets deregistered
2504
2917
cleanup()
2505
2918
2919
2506
2920
if __name__ == '__main__':
2507
2921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0