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- Committer: Teddy Hogeborn
- Date: 2015-07-12 01:07:14 UTC
- Revision ID: teddy@recompile.se-20150712010714-peiodtm9ay0nbjs2
plugins.d/mandos-client.c (main): See why it failed to bring up interface.
- files added:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 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
77
import binascii
78
import tempfile
79
import itertools
80
import collections
81
import codecs
66
82
67
83
import dbus
68
84
import dbus.service
69
import gobject
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
70
89
import avahi
71
90
from dbus.mainloop.glib import DBusGMainLoop
72
91
import ctypes
82
101
except ImportError:
83
102
SO_BINDTODEVICE = None
84
103
85
86
version = "1.4.0"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
108
stored_state_file = "clients.pickle"
109
110
logger = logging.getLogger()
111
syslogger = None
112
113
try:
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
117
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
126
127
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
137
' %(message)s'))
138
logger.addHandler(syslogger)
139
140
if debug:
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
' [%(process)d]:'
144
' %(levelname)s:'
145
' %(message)s'))
146
logger.addHandler(console)
147
logger.setLevel(level)
148
149
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
152
pass
153
154
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
158
def __init__(self):
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
165
166
def __enter__(self):
167
return self
168
169
def __exit__(self, exc_type, exc_value, traceback):
170
self._cleanup()
171
return False
172
173
def __del__(self):
174
self._cleanup()
175
176
def _cleanup(self):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
180
topdown = False):
181
for filename in files:
182
os.remove(os.path.join(root, filename))
183
for dirname in dirs:
184
os.rmdir(os.path.join(root, dirname))
185
# Remove tempdir
186
os.rmdir(self.tempdir)
187
self.tempdir = None
188
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# NUL bytes. So we prefix it and hex encode it.
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
199
200
def encrypt(self, data, password):
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)
216
return ciphertext
217
218
def decrypt(self, data, password):
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)
234
return decrypted_plaintext
235
103
236
104
237
class AvahiError(Exception):
105
238
def __init__(self, value, *args, **kwargs):
106
239
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
110
243
111
244
class AvahiServiceError(AvahiError):
112
245
pass
113
246
247
114
248
class AvahiGroupError(AvahiError):
115
249
pass
116
250
123
257
Used to optionally bind to the specified interface.
124
258
name: string; Example: 'Mandos'
125
259
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
260
See <https://www.iana.org/assignments/service-names-port-numbers>
127
261
port: integer; what port to announce
128
262
TXT: list of strings; TXT record for the service
129
263
domain: string; Domain to publish on, default to .local if empty.
135
269
server: D-Bus Server
136
270
bus: dbus.SystemBus()
137
271
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
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):
142
284
self.interface = interface
143
285
self.name = name
144
286
self.type = servicetype
153
295
self.server = None
154
296
self.bus = bus
155
297
self.entry_group_state_changed_match = None
156
def rename(self):
298
299
def rename(self, remove=True):
157
300
"""Derived from the Avahi example code"""
158
301
if self.rename_count >= self.max_renames:
159
302
logger.critical("No suitable Zeroconf service name found"
160
303
" after %i retries, exiting.",
161
304
self.rename_count)
162
305
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
165
309
logger.info("Changing Zeroconf service name to %r ...",
166
310
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
311
if remove:
312
self.remove()
172
313
try:
173
314
self.add()
174
315
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
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
179
325
def remove(self):
180
326
"""Derived from the Avahi example code"""
181
327
if self.entry_group_state_changed_match is not None:
183
329
self.entry_group_state_changed_match = None
184
330
if self.group is not None:
185
331
self.group.Reset()
332
186
333
def add(self):
187
334
"""Derived from the Avahi example code"""
188
335
self.remove()
193
340
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
341
self.entry_group_state_changed_match = (
195
342
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
343
'StateChanged', self.entry_group_state_changed))
197
344
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
345
self.name, self.type)
199
346
self.group.AddService(
205
352
dbus.UInt16(self.port),
206
353
avahi.string_array_to_txt_array(self.TXT))
207
354
self.group.Commit()
355
208
356
def entry_group_state_changed(self, state, error):
209
357
"""Derived from the Avahi example code"""
210
358
logger.debug("Avahi entry group state change: %i", state)
216
364
self.rename()
217
365
elif state == avahi.ENTRY_GROUP_FAILURE:
218
366
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
222
370
def cleanup(self):
223
371
"""Derived from the Avahi example code"""
224
372
if self.group is not None:
225
373
try:
226
374
self.group.Free()
227
375
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
376
dbus.exceptions.DBusException):
229
377
pass
230
378
self.group = None
231
379
self.remove()
380
232
381
def server_state_changed(self, state, error=None):
233
382
"""Derived from the Avahi example code"""
234
383
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"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
}
242
390
if state in bad_states:
243
391
if bad_states[state] is not None:
244
392
if error is None:
253
401
logger.debug("Unknown state: %r", state)
254
402
else:
255
403
logger.debug("Unknown state: %r: %r", state, error)
404
256
405
def activate(self):
257
406
"""Derived from the Avahi example code"""
258
407
if self.server is None:
262
411
follow_name_owner_changes=True),
263
412
avahi.DBUS_INTERFACE_SERVER)
264
413
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
414
self.server_state_changed)
266
415
self.server_state_changed(self.server.GetState())
267
416
268
417
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
418
class AvahiServiceToSyslog(AvahiService):
419
def rename(self, *args, **kwargs):
420
"""Add the new name to the syslog messages"""
421
ret = AvahiService.rename(self, *args, **kwargs)
422
syslogger.setFormatter(logging.Formatter(
423
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
424
.format(self.name)))
425
return ret
426
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
275
437
class Client(object):
276
438
"""A representation of a client host served by this server.
277
439
278
440
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
441
approved: bool(); 'None' if not yet approved/disapproved
280
442
approval_delay: datetime.timedelta(); Time to wait for approval
281
443
approval_duration: datetime.timedelta(); Duration of one approval
282
444
checker: subprocess.Popen(); a running checker process used
289
451
instance %(name)s can be used in the command.
290
452
checker_initiator_tag: a gobject event source tag, or None
291
453
created: datetime.datetime(); (UTC) object creation
454
client_structure: Object describing what attributes a client has
455
and is used for storing the client at exit
292
456
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
457
disable_initiator_tag: a gobject event source tag, or None
295
458
enabled: bool()
296
459
fingerprint: string (40 or 32 hexadecimal digits); used to
299
462
interval: datetime.timedelta(); How often to start a new checker
300
463
last_approval_request: datetime.datetime(); (UTC) or None
301
464
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
465
last_checker_status: integer between 0 and 255 reflecting exit
466
status of last checker. -1 reflects crashed
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
470
last_enabled: datetime.datetime(); (UTC) or None
303
471
name: string; from the config file, used in log messages and
304
472
D-Bus identifiers
305
473
secret: bytestring; sent verbatim (over TLS) to client
306
474
timeout: datetime.timedelta(); How long from last_checked_ok
307
475
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
476
extended_timeout: extra long timeout when secret has been sent
309
477
runtime_expansions: Allowed attributes for runtime expansion.
310
478
expires: datetime.datetime(); time (UTC) when a client will be
311
479
disabled, or None
480
server_settings: The server_settings dict from main()
312
481
"""
313
482
314
483
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
484
"created", "enabled", "expires",
485
"fingerprint", "host", "interval",
486
"last_approval_request", "last_checked_ok",
317
487
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
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
500
@staticmethod
501
def config_parser(config):
502
"""Construct a new dict of client settings of this form:
503
{ client_name: {setting_name: value, ...}, ...}
504
with exceptions for any special settings as defined above.
505
NOTE: Must be a pure function. Must return the same result
506
value given the same arguments.
507
"""
508
settings = {}
509
for client_name in config.sections():
510
section = dict(config.items(client_name))
511
client = settings[client_name] = {}
512
513
client["host"] = section["host"]
514
# Reformat values from string types to Python types
515
client["approved_by_default"] = config.getboolean(
516
client_name, "approved_by_default")
517
client["enabled"] = config.getboolean(client_name,
518
"enabled")
519
520
# Uppercase and remove spaces from fingerprint for later
521
# comparison purposes with return value from the
522
# fingerprint() function
523
client["fingerprint"] = (section["fingerprint"].upper()
524
.replace(" ", ""))
525
if "secret" in section:
526
client["secret"] = section["secret"].decode("base64")
527
elif "secfile" in section:
528
with open(os.path.expanduser(os.path.expandvars
529
(section["secfile"])),
530
"rb") as secfile:
531
client["secret"] = secfile.read()
532
else:
533
raise TypeError("No secret or secfile for section {}"
534
.format(section))
535
client["timeout"] = string_to_delta(section["timeout"])
536
client["extended_timeout"] = string_to_delta(
537
section["extended_timeout"])
538
client["interval"] = string_to_delta(section["interval"])
539
client["approval_delay"] = string_to_delta(
540
section["approval_delay"])
541
client["approval_duration"] = string_to_delta(
542
section["approval_duration"])
543
client["checker_command"] = section["checker"]
544
client["last_approval_request"] = None
545
client["last_checked_ok"] = None
546
client["last_checker_status"] = -2
547
548
return settings
549
550
def __init__(self, settings, name = None, server_settings=None):
338
551
self.name = name
339
if config is None:
340
config = {}
552
if server_settings is None:
553
server_settings = {}
554
self.server_settings = server_settings
555
# adding all client settings
556
for setting, value in settings.items():
557
setattr(self, setting, value)
558
559
if self.enabled:
560
if not hasattr(self, "last_enabled"):
561
self.last_enabled = datetime.datetime.utcnow()
562
if not hasattr(self, "expires"):
563
self.expires = (datetime.datetime.utcnow()
564
+ self.timeout)
565
else:
566
self.last_enabled = None
567
self.expires = None
568
341
569
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
570
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
571
self.created = settings.get("created",
572
datetime.datetime.utcnow())
573
574
# attributes specific for this server instance
369
575
self.checker = None
370
576
self.checker_initiator_tag = None
371
577
self.disable_initiator_tag = None
372
self.expires = None
373
578
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
579
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
580
self.approved = None
380
581
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
582
self.changedstate = multiprocessing_manager.Condition(
583
multiprocessing_manager.Lock())
584
self.client_structure = [attr
585
for attr in self.__dict__.iterkeys()
586
if not attr.startswith("_")]
587
self.client_structure.append("client_structure")
588
589
for name, t in inspect.getmembers(
590
type(self), lambda obj: isinstance(obj, property)):
591
if not name.startswith("_"):
592
self.client_structure.append(name)
388
593
594
# Send notice to process children that client state has changed
389
595
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
596
with self.changedstate:
597
self.changedstate.notify_all()
393
598
394
599
def enable(self):
395
600
"""Start this client's checker and timeout hooks"""
396
601
if getattr(self, "enabled", False):
397
602
# Already enabled
398
603
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
604
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
605
self.enabled = True
411
606
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
607
self.init_checker()
608
self.send_changedstate()
414
609
415
610
def disable(self, quiet=True):
416
611
"""Disable this client."""
417
612
if not getattr(self, "enabled", False):
418
613
return False
419
614
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
615
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
616
if getattr(self, "disable_initiator_tag", None) is not None:
424
617
gobject.source_remove(self.disable_initiator_tag)
425
618
self.disable_initiator_tag = None
426
619
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
620
if getattr(self, "checker_initiator_tag", None) is not None:
428
621
gobject.source_remove(self.checker_initiator_tag)
429
622
self.checker_initiator_tag = None
430
623
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
624
self.enabled = False
625
if not quiet:
626
self.send_changedstate()
434
627
# Do not run this again if called by a gobject.timeout_add
435
628
return False
436
629
437
630
def __del__(self):
438
self.disable_hook = None
439
631
self.disable()
440
632
441
def checker_callback(self, pid, condition, command):
633
def init_checker(self):
634
# Schedule a new checker to be started an 'interval' from now,
635
# and every interval from then on.
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)
641
# Schedule a disable() when 'timeout' has passed
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)
646
# Also start a new checker *right now*.
647
self.start_checker()
648
649
def checker_callback(self, source, condition, connection,
650
command):
442
651
"""The checker has completed, so take appropriate actions."""
443
652
self.checker_callback_tag = None
444
653
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
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
661
if self.last_checker_status == 0:
448
662
logger.info("Checker for %(name)s succeeded",
449
663
vars(self))
450
664
self.checked_ok()
451
665
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
666
logger.info("Checker for %(name)s failed", vars(self))
454
667
else:
668
self.last_checker_status = -1
669
self.last_checker_signal = -returncode
455
670
logger.warning("Checker for %(name)s crashed?",
456
671
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
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."""
464
683
if timeout is None:
465
684
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.disable_initiator_tag = (gobject.timeout_add
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
685
if self.disable_initiator_tag is not None:
686
gobject.source_remove(self.disable_initiator_tag)
687
self.disable_initiator_tag = None
688
if getattr(self, "enabled", False):
689
self.disable_initiator_tag = gobject.timeout_add(
690
int(timeout.total_seconds() * 1000), self.disable)
691
self.expires = datetime.datetime.utcnow() + timeout
472
692
473
693
def need_approval(self):
474
694
self.last_approval_request = datetime.datetime.utcnow()
479
699
If a checker already exists, leave it running and do
480
700
nothing."""
481
701
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# 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
486
706
# checkers alone, the checker would have to take more time
487
707
# than 'timeout' for the client to be disabled, which is as it
488
708
# should be.
489
709
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
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
503
714
# Start a new checker if needed
504
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 }
505
720
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
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
524
727
self.current_checker_command = command
525
try:
526
logger.info("Starting checker %r for %s",
527
command, self.name)
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
533
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
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)
548
753
# Re-run this periodically if run by gobject.timeout_add
549
754
return True
550
755
556
761
if getattr(self, "checker", None) is None:
557
762
return
558
763
logger.debug("Stopping checker for %(name)s", vars(self))
559
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
561
#time.sleep(0.5)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
566
raise
764
self.checker.terminate()
567
765
self.checker = None
568
766
569
767
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
768
def dbus_service_property(dbus_interface,
769
signature="v",
770
access="readwrite",
771
byte_arrays=False):
572
772
"""Decorators for marking methods of a DBusObjectWithProperties to
573
773
become properties on the D-Bus.
574
774
583
783
# "Set" method, so we fail early here:
584
784
if byte_arrays and signature != "ay":
585
785
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
786
" signature {!r}".format(signature))
787
587
788
def decorator(func):
588
789
func._dbus_is_property = True
589
790
func._dbus_interface = dbus_interface
594
795
func._dbus_name = func._dbus_name[:-14]
595
796
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
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
597
840
return decorator
598
841
599
842
600
843
class DBusPropertyException(dbus.exceptions.DBusException):
601
844
"""A base class for D-Bus property-related exceptions
602
845
"""
603
def __unicode__(self):
604
return unicode(str(self))
846
pass
605
847
606
848
607
849
class DBusPropertyAccessException(DBusPropertyException):
625
867
"""
626
868
627
869
@staticmethod
628
def _is_dbus_property(obj):
629
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)
630
878
631
def _get_all_dbus_properties(self):
879
def _get_all_dbus_things(self, thing):
632
880
"""Returns a generator of (name, attribute) pairs
633
881
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
882
return ((getattr(athing.__get__(self), "_dbus_name", name),
883
athing.__get__(self))
635
884
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
885
for name, athing in
886
inspect.getmembers(cls, self._is_dbus_thing(thing)))
638
887
639
888
def _get_dbus_property(self, interface_name, property_name):
640
889
"""Returns a bound method if one exists which is a D-Bus
641
890
property with the specified name and interface.
642
891
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(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")):
646
895
if (value._dbus_name == property_name
647
896
and value._dbus_interface == interface_name):
648
897
return value.__get__(self)
649
898
650
899
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
900
raise DBusPropertyNotFound("{}:{}.{}".format(
901
self.dbus_object_path, interface_name, property_name))
654
902
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
903
@dbus.service.method(dbus.PROPERTIES_IFACE,
904
in_signature="ss",
656
905
out_signature="v")
657
906
def Get(self, interface_name, property_name):
658
907
"""Standard D-Bus property Get() method, see D-Bus standard.
676
925
# The byte_arrays option is not supported yet on
677
926
# signatures other than "ay".
678
927
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
928
raise ValueError("Byte arrays not supported for non-"
929
"'ay' signature {!r}"
930
.format(prop._dbus_signature))
931
value = dbus.ByteArray(b''.join(chr(byte)
932
for byte in value))
682
933
prop(value)
683
934
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
935
@dbus.service.method(dbus.PROPERTIES_IFACE,
936
in_signature="s",
685
937
out_signature="a{sv}")
686
938
def GetAll(self, interface_name):
687
939
"""Standard D-Bus property GetAll() method, see D-Bus
689
941
690
942
Note: Will not include properties with access="write".
691
943
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
944
properties = {}
945
for name, prop in self._get_all_dbus_things("property"):
694
946
if (interface_name
695
947
and interface_name != prop._dbus_interface):
696
948
# Interface non-empty but did not match
700
952
continue
701
953
value = prop()
702
954
if not hasattr(value, "variant_level"):
703
all[name] = value
955
properties[name] = value
704
956
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
957
properties[name] = type(value)(
958
value, variant_level = value.variant_level + 1)
959
return dbus.Dictionary(properties, signature="sv")
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
708
968
709
969
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
970
out_signature="s",
711
971
path_keyword='object_path',
712
972
connection_keyword='connection')
713
973
def Introspect(self, object_path, connection):
714
"""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.
715
977
"""
716
978
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
979
connection)
718
980
try:
719
981
document = xml.dom.minidom.parseString(xmlstring)
982
720
983
def make_tag(document, name, prop):
721
984
e = document.createElement("property")
722
985
e.setAttribute("name", name)
723
986
e.setAttribute("type", prop._dbus_signature)
724
987
e.setAttribute("access", prop._dbus_access)
725
988
return e
989
726
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
727
992
for tag in (make_tag(document, name, prop)
728
993
for name, prop
729
in self._get_all_dbus_properties()
994
in self._get_all_dbus_things("property")
730
995
if prop._dbus_interface
731
996
== if_tag.getAttribute("name")):
732
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)
733
1027
# Add the names to the return values for the
734
1028
# "org.freedesktop.DBus.Properties" methods
735
1029
if (if_tag.getAttribute("name")
750
1044
except (AttributeError, xml.dom.DOMException,
751
1045
xml.parsers.expat.ExpatError) as error:
752
1046
logger.error("Failed to override Introspection method",
753
error)
1047
exc_info=error)
754
1048
return xmlstring
755
1049
756
1050
757
def datetime_to_dbus (dt, variant_level=0):
1051
def datetime_to_dbus(dt, variant_level=0):
758
1052
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1053
if dt is None:
760
1054
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
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).
768
1080
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
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):
776
1089
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1090
# with the wrong interface name
778
1091
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1092
or not attribute._dbus_interface.startswith(
1093
orig_interface_name)):
781
1094
continue
782
1095
# Create an alternate D-Bus interface name based on
783
1096
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1097
alt_interface = attribute._dbus_interface.replace(
1098
orig_interface_name, alt_interface_name)
1099
interface_names.add(alt_interface)
787
1100
# Is this a D-Bus signal?
788
1101
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
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(
792
1106
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1107
attribute.__closure__))
1108
["func"].cell_contents)
1109
else:
1110
nonmethod_func = attribute
795
1111
# Create a new, but exactly alike, function
796
1112
# object, and decorate it to be a new D-Bus signal
797
1113
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
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
807
1137
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# 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
810
1141
def fixscope(func1, func2):
811
1142
"""This function is a scope container to pass
812
1143
func1 and func2 to the "call_both" function
813
1144
outside of its arguments"""
1145
814
1146
def call_both(*args, **kwargs):
815
1147
"""This function will emit two D-Bus
816
1148
signals by calling func1 and func2"""
817
1149
func1(*args, **kwargs)
818
1150
func2(*args, **kwargs)
1151
819
1152
return call_both
820
1153
# Create the "call_both" function and add it to
821
1154
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1155
attr[attrname] = fixscope(attribute, new_function)
824
1156
# Is this a D-Bus method?
825
1157
elif getattr(attribute, "_dbus_is_method", False):
826
1158
# Create a new, but exactly alike, function
827
1159
# object. Decorate it to be a new D-Bus method
828
1160
# with the alternate D-Bus interface name. Add it
829
1161
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
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
840
1178
# Is this a D-Bus property?
841
1179
elif getattr(attribute, "_dbus_is_property", False):
842
1180
# Create a new, but exactly alike, function
843
1181
# object, and decorate it to be a new D-Bus
844
1182
# property with the alternate D-Bus interface
845
1183
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
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"})
861
1241
class ClientDBus(Client, DBusObjectWithProperties):
862
1242
"""A Client class using D-Bus
863
1243
867
1247
"""
868
1248
869
1249
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
1250
+ ("dbus_object_path", ))
1251
1252
_interface = "se.recompile.Mandos.Client"
871
1253
872
1254
# dbus.service.Object doesn't use super(), so we can't either.
873
1255
874
1256
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
876
1257
self.bus = bus
877
1258
Client.__init__(self, *args, **kwargs)
878
1259
# Only now, when this client is initialized, can it show up on
879
1260
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1261
client_object_name = str(self.name).translate(
881
1262
{ord("."): ord("_"),
882
1263
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1264
self.dbus_object_path = dbus.ObjectPath(
1265
"/clients/" + client_object_name)
885
1266
DBusObjectWithProperties.__init__(self, self.bus,
886
1267
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
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):
891
1274
""" Modify a variable so that it's a property which announces
892
1275
its changes to DBus.
893
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1276
1277
transform_fun: Function that takes a value and a variant_level
1278
and transforms it to a D-Bus type.
896
1279
dbus_name: D-Bus name of the variable
897
1280
type_func: Function that transform the value before sending it
898
1281
to the D-Bus. Default: no transform
899
1282
variant_level: D-Bus variant level. Default: 1
900
1283
"""
901
attrname = "_{0}".format(dbus_name)
1284
attrname = "_{}".format(dbus_name)
1285
902
1286
def setter(self, value):
903
1287
if hasattr(self, "dbus_object_path"):
904
1288
if (not hasattr(self, attrname) or
905
1289
type_func(getattr(self, attrname, None))
906
1290
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
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())
911
1306
setattr(self, attrname, value)
912
1307
913
1308
return property(lambda self: getattr(self, attrname), setter)
914
1309
915
916
1310
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1311
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1312
"ApprovalPending",
920
1314
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1315
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1316
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1317
checker = notifychangeproperty(
1318
dbus.Boolean, "CheckerRunning",
1319
type_func = lambda checker: checker is not None)
926
1320
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1321
"LastCheckedOK")
1322
last_checker_status = notifychangeproperty(dbus.Int16,
1323
"LastCheckerStatus")
928
1324
last_approval_request = notifychangeproperty(
929
1325
datetime_to_dbus, "LastApprovalRequest")
930
1326
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1327
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1328
approval_delay = notifychangeproperty(
1329
dbus.UInt64, "ApprovalDelay",
1330
type_func = lambda td: td.total_seconds() * 1000)
936
1331
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1332
dbus.UInt64, "ApprovalDuration",
1333
type_func = lambda td: td.total_seconds() * 1000)
939
1334
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1335
timeout = notifychangeproperty(
1336
dbus.UInt64, "Timeout",
1337
type_func = lambda td: td.total_seconds() * 1000)
943
1338
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
1339
dbus.UInt64, "ExtendedTimeout",
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)
950
1344
checker_command = notifychangeproperty(dbus.String, "Checker")
1345
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
invalidate_only=True)
951
1347
952
1348
del notifychangeproperty
953
1349
960
1356
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1357
Client.__del__(self, *args, **kwargs)
962
1358
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
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:
969
1366
# Emit D-Bus signal
970
1367
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1368
dbus.Int64(0),
972
1369
dbus.String(command))
973
1370
else:
974
1371
# Emit D-Bus signal
975
1372
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1373
dbus.Int64(
1374
self.last_checker_signal),
977
1375
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
1376
return ret
981
1377
982
1378
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1379
old_checker_pid = getattr(self.checker, "pid", None)
988
1380
r = Client.start_checker(self, *args, **kwargs)
989
1381
# Only if new checker process was started
990
1382
if (self.checker is not None
994
1386
return r
995
1387
996
1388
def _reset_approved(self):
997
self._approved = None
1389
self.approved = None
998
1390
return False
999
1391
1000
1392
def approve(self, value=True):
1393
self.approved = value
1394
gobject.timeout_add(int(self.approval_duration.total_seconds()
1395
* 1000), self._reset_approved)
1001
1396
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1397
1008
1398
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1399
1400
## Interfaces
1010
1401
1011
1402
## Signals
1012
1403
1023
1414
pass
1024
1415
1025
1416
# PropertyChanged - signal
1417
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1418
@dbus.service.signal(_interface, signature="sv")
1027
1419
def PropertyChanged(self, property, value):
1028
1420
"D-Bus signal"
1092
1484
return dbus.Boolean(bool(self.approvals_pending))
1093
1485
1094
1486
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
1487
@dbus_service_property(_interface,
1488
signature="b",
1096
1489
access="readwrite")
1097
1490
def ApprovedByDefault_dbus_property(self, value=None):
1098
1491
if value is None: # get
1100
1493
self.approved_by_default = bool(value)
1101
1494
1102
1495
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
1496
@dbus_service_property(_interface,
1497
signature="t",
1104
1498
access="readwrite")
1105
1499
def ApprovalDelay_dbus_property(self, value=None):
1106
1500
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
1501
return dbus.UInt64(self.approval_delay.total_seconds()
1502
* 1000)
1108
1503
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
1504
1110
1505
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
1506
@dbus_service_property(_interface,
1507
signature="t",
1112
1508
access="readwrite")
1113
1509
def ApprovalDuration_dbus_property(self, value=None):
1114
1510
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
1511
return dbus.UInt64(self.approval_duration.total_seconds()
1512
* 1000)
1117
1513
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
1514
1119
1515
# Name - property
1127
1523
return dbus.String(self.fingerprint)
1128
1524
1129
1525
# Host - property
1130
@dbus_service_property(_interface, signature="s",
1526
@dbus_service_property(_interface,
1527
signature="s",
1131
1528
access="readwrite")
1132
1529
def Host_dbus_property(self, value=None):
1133
1530
if value is None: # get
1134
1531
return dbus.String(self.host)
1135
self.host = value
1532
self.host = str(value)
1136
1533
1137
1534
# Created - property
1138
1535
@dbus_service_property(_interface, signature="s", access="read")
1139
1536
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1537
return datetime_to_dbus(self.created)
1141
1538
1142
1539
# LastEnabled - property
1143
1540
@dbus_service_property(_interface, signature="s", access="read")
1145
1542
return datetime_to_dbus(self.last_enabled)
1146
1543
1147
1544
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
1545
@dbus_service_property(_interface,
1546
signature="b",
1149
1547
access="readwrite")
1150
1548
def Enabled_dbus_property(self, value=None):
1151
1549
if value is None: # get
1156
1554
self.disable()
1157
1555
1158
1556
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
1557
@dbus_service_property(_interface,
1558
signature="s",
1160
1559
access="readwrite")
1161
1560
def LastCheckedOK_dbus_property(self, value=None):
1162
1561
if value is not None:
1164
1563
return
1165
1564
return datetime_to_dbus(self.last_checked_ok)
1166
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
1167
1571
# Expires - property
1168
1572
@dbus_service_property(_interface, signature="s", access="read")
1169
1573
def Expires_dbus_property(self):
1175
1579
return datetime_to_dbus(self.last_approval_request)
1176
1580
1177
1581
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
1582
@dbus_service_property(_interface,
1583
signature="t",
1179
1584
access="readwrite")
1180
1585
def Timeout_dbus_property(self, value=None):
1181
1586
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
1587
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
old_timeout = self.timeout
1183
1589
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1590
# Reschedule disabling
1591
if self.enabled:
1592
now = datetime.datetime.utcnow()
1593
self.expires += self.timeout - old_timeout
1594
if self.expires <= now:
1595
# The timeout has passed
1596
self.disable()
1597
else:
1598
if (getattr(self, "disable_initiator_tag", None)
1599
is None):
1600
return
1601
gobject.source_remove(self.disable_initiator_tag)
1602
self.disable_initiator_tag = gobject.timeout_add(
1603
int((self.expires - now).total_seconds() * 1000),
1604
self.disable)
1205
1605
1206
1606
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
1607
@dbus_service_property(_interface,
1608
signature="t",
1208
1609
access="readwrite")
1209
1610
def ExtendedTimeout_dbus_property(self, value=None):
1210
1611
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
1612
return dbus.UInt64(self.extended_timeout.total_seconds()
1613
* 1000)
1212
1614
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
1615
1214
1616
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
1617
@dbus_service_property(_interface,
1618
signature="t",
1216
1619
access="readwrite")
1217
1620
def Interval_dbus_property(self, value=None):
1218
1621
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
1622
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
1623
self.interval = datetime.timedelta(0, 0, 0, value)
1221
1624
if getattr(self, "checker_initiator_tag", None) is None:
1222
1625
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1626
if self.enabled:
1627
# Reschedule checker run
1628
gobject.source_remove(self.checker_initiator_tag)
1629
self.checker_initiator_tag = gobject.timeout_add(
1630
value, self.start_checker)
1631
self.start_checker() # Start one now, too
1228
1632
1229
1633
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
1634
@dbus_service_property(_interface,
1635
signature="s",
1231
1636
access="readwrite")
1232
1637
def Checker_dbus_property(self, value=None):
1233
1638
if value is None: # get
1234
1639
return dbus.String(self.checker_command)
1235
self.checker_command = value
1640
self.checker_command = str(value)
1236
1641
1237
1642
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
1643
@dbus_service_property(_interface,
1644
signature="b",
1239
1645
access="readwrite")
1240
1646
def CheckerRunning_dbus_property(self, value=None):
1241
1647
if value is None: # get
1251
1657
return self.dbus_object_path # is already a dbus.ObjectPath
1252
1658
1253
1659
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
1660
@dbus_service_property(_interface,
1661
signature="ay",
1662
access="write",
1663
byte_arrays=True)
1256
1664
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
1665
self.secret = bytes(value)
1258
1666
1259
1667
del _interface
1260
1668
1264
1672
self._pipe = child_pipe
1265
1673
self._pipe.send(('init', fpr, address))
1266
1674
if not self._pipe.recv():
1267
raise KeyError()
1675
raise KeyError(fpr)
1268
1676
1269
1677
def __getattribute__(self, name):
1270
if(name == '_pipe'):
1678
if name == '_pipe':
1271
1679
return super(ProxyClient, self).__getattribute__(name)
1272
1680
self._pipe.send(('getattr', name))
1273
1681
data = self._pipe.recv()
1274
1682
if data[0] == 'data':
1275
1683
return data[1]
1276
1684
if data[0] == 'function':
1685
1277
1686
def func(*args, **kwargs):
1278
1687
self._pipe.send(('funcall', name, args, kwargs))
1279
1688
return self._pipe.recv()[1]
1689
1280
1690
return func
1281
1691
1282
1692
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
1693
if name == '_pipe':
1284
1694
return super(ProxyClient, self).__setattr__(name, value)
1285
1695
self._pipe.send(('setattr', name, value))
1286
1696
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
1697
1290
1698
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
1699
"""A class to handle client connections.
1296
1704
def handle(self):
1297
1705
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
1706
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
1707
str(self.client_address))
1300
1708
logger.debug("Pipe FD: %d",
1301
1709
self.server.child_pipe.fileno())
1302
1710
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1711
session = gnutls.connection.ClientSession(
1712
self.request, gnutls.connection .X509Credentials())
1307
1713
1308
1714
# Note: gnutls.connection.X509Credentials is really a
1309
1715
# generic GnuTLS certificate credentials object so long as
1318
1724
priority = self.server.gnutls_priority
1319
1725
if priority is None:
1320
1726
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1727
gnutls.library.functions.gnutls_priority_set_direct(
1728
session._c_object, priority, None)
1324
1729
1325
1730
# Start communication using the Mandos protocol
1326
1731
# Get protocol number
1328
1733
logger.debug("Protocol version: %r", line)
1329
1734
try:
1330
1735
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
1736
raise RuntimeError(line)
1332
1737
except (ValueError, IndexError, RuntimeError) as error:
1333
1738
logger.error("Unknown protocol version: %s", error)
1334
1739
return
1346
1751
approval_required = False
1347
1752
try:
1348
1753
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1754
fpr = self.fingerprint(
1755
self.peer_certificate(session))
1351
1756
except (TypeError,
1352
1757
gnutls.errors.GNUTLSError) as error:
1353
1758
logger.warning("Bad certificate: %s", error)
1368
1773
while True:
1369
1774
if not client.enabled:
1370
1775
logger.info("Client %s is disabled",
1371
client.name)
1776
client.name)
1372
1777
if self.server.use_dbus:
1373
1778
# Emit D-Bus signal
1374
1779
client.Rejected("Disabled")
1375
1780
return
1376
1781
1377
if client._approved or not client.approval_delay:
1782
if client.approved or not client.approval_delay:
1378
1783
#We are approved or approval is disabled
1379
1784
break
1380
elif client._approved is None:
1785
elif client.approved is None:
1381
1786
logger.info("Client %s needs approval",
1382
1787
client.name)
1383
1788
if self.server.use_dbus:
1384
1789
# Emit D-Bus signal
1385
1790
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
1791
client.approval_delay.total_seconds()
1792
* 1000, client.approved_by_default)
1388
1793
else:
1389
1794
logger.warning("Client %s was not approved",
1390
1795
client.name)
1396
1801
#wait until timeout or approved
1397
1802
time = datetime.datetime.now()
1398
1803
client.changedstate.acquire()
1399
(client.changedstate.wait
1400
(float(client._timedelta_to_milliseconds(delay)
1401
/ 1000)))
1804
client.changedstate.wait(delay.total_seconds())
1402
1805
client.changedstate.release()
1403
1806
time2 = datetime.datetime.now()
1404
1807
if (time2 - time) >= delay:
1420
1823
try:
1421
1824
sent = session.send(client.secret[sent_size:])
1422
1825
except gnutls.errors.GNUTLSError as error:
1423
logger.warning("gnutls send failed")
1826
logger.warning("gnutls send failed",
1827
exc_info=error)
1424
1828
return
1425
logger.debug("Sent: %d, remaining: %d",
1426
sent, len(client.secret)
1427
- (sent_size + sent))
1829
logger.debug("Sent: %d, remaining: %d", sent,
1830
len(client.secret) - (sent_size
1831
+ sent))
1428
1832
sent_size += sent
1429
1833
1430
1834
logger.info("Sending secret to %s", client.name)
1431
# bump the timeout as if seen
1432
client.checked_ok(client.extended_timeout)
1835
# bump the timeout using extended_timeout
1836
client.bump_timeout(client.extended_timeout)
1433
1837
if self.server.use_dbus:
1434
1838
# Emit D-Bus signal
1435
1839
client.GotSecret()
1440
1844
try:
1441
1845
session.bye()
1442
1846
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("GnuTLS bye failed")
1847
logger.warning("GnuTLS bye failed",
1848
exc_info=error)
1444
1849
1445
1850
@staticmethod
1446
1851
def peer_certificate(session):
1447
1852
"Return the peer's OpenPGP certificate as a bytestring"
1448
1853
# If not an OpenPGP certificate...
1449
if (gnutls.library.functions
1450
.gnutls_certificate_type_get(session._c_object)
1854
if (gnutls.library.functions.gnutls_certificate_type_get(
1855
session._c_object)
1451
1856
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1452
1857
# ...do the normal thing
1453
1858
return session.peer_certificate
1467
1872
def fingerprint(openpgp):
1468
1873
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1469
1874
# New GnuTLS "datum" with the OpenPGP public key
1470
datum = (gnutls.library.types
1471
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1472
ctypes.POINTER
1473
(ctypes.c_ubyte)),
1474
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)))
1475
1879
# New empty GnuTLS certificate
1476
1880
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1477
(gnutls.library.functions
1478
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1881
gnutls.library.functions.gnutls_openpgp_crt_init(
1882
ctypes.byref(crt))
1479
1883
# Import the OpenPGP public key into the certificate
1480
(gnutls.library.functions
1481
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1482
gnutls.library.constants
1483
.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)
1484
1887
# Verify the self signature in the key
1485
1888
crtverify = ctypes.c_uint()
1486
(gnutls.library.functions
1487
.gnutls_openpgp_crt_verify_self(crt, 0,
1488
ctypes.byref(crtverify)))
1889
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
crt, 0, ctypes.byref(crtverify))
1489
1891
if crtverify.value != 0:
1490
1892
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1491
raise (gnutls.errors.CertificateSecurityError
1492
("Verify failed"))
1893
raise gnutls.errors.CertificateSecurityError(
1894
"Verify failed")
1493
1895
# New buffer for the fingerprint
1494
1896
buf = ctypes.create_string_buffer(20)
1495
1897
buf_len = ctypes.c_size_t()
1496
1898
# Get the fingerprint from the certificate into the buffer
1497
(gnutls.library.functions
1498
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1499
ctypes.byref(buf_len)))
1899
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1900
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1500
1901
# Deinit the certificate
1501
1902
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1502
1903
# Convert the buffer to a Python bytestring
1503
1904
fpr = ctypes.string_at(buf, buf_len.value)
1504
1905
# Convert the bytestring to hexadecimal notation
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1906
hex_fpr = binascii.hexlify(fpr).upper()
1506
1907
return hex_fpr
1507
1908
1508
1909
1509
1910
class MultiprocessingMixIn(object):
1510
1911
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1912
1511
1913
def sub_process_main(self, request, address):
1512
1914
try:
1513
1915
self.finish_request(request, address)
1514
except:
1916
except Exception:
1515
1917
self.handle_error(request, address)
1516
1918
self.close_request(request)
1517
1919
1518
1920
def process_request(self, request, address):
1519
1921
"""Start a new process to process the request."""
1520
1922
proc = multiprocessing.Process(target = self.sub_process_main,
1521
args = (request,
1522
address))
1923
args = (request, address))
1523
1924
proc.start()
1524
1925
return proc
1525
1926
1526
1927
1527
1928
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1528
1929
""" adds a pipe to the MixIn """
1930
1529
1931
def process_request(self, request, client_address):
1530
1932
"""Overrides and wraps the original process_request().
1531
1933
1540
1942
1541
1943
def add_pipe(self, parent_pipe, proc):
1542
1944
"""Dummy function; override as necessary"""
1543
raise NotImplementedError
1945
raise NotImplementedError()
1544
1946
1545
1947
1546
1948
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1552
1954
interface: None or a network interface name (string)
1553
1955
use_ipv6: Boolean; to use IPv6 or not
1554
1956
"""
1957
1555
1958
def __init__(self, server_address, RequestHandlerClass,
1556
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
"""
1557
1965
self.interface = interface
1558
1966
if use_ipv6:
1559
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.
1560
1994
socketserver.TCPServer.__init__(self, server_address,
1561
1995
RequestHandlerClass)
1996
1562
1997
def server_bind(self):
1563
1998
"""This overrides the normal server_bind() function
1564
1999
to bind to an interface if one was specified, and also NOT to
1570
2005
self.interface)
1571
2006
else:
1572
2007
try:
1573
self.socket.setsockopt(socket.SOL_SOCKET,
1574
SO_BINDTODEVICE,
1575
str(self.interface
1576
+ '\0'))
2008
self.socket.setsockopt(
2009
socket.SOL_SOCKET, SO_BINDTODEVICE,
2010
(self.interface + "\0").encode("utf-8"))
1577
2011
except socket.error as error:
1578
if error[0] == errno.EPERM:
1579
logger.error("No permission to"
1580
" bind to interface %s",
1581
self.interface)
1582
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:
1583
2016
logger.error("SO_BINDTODEVICE not available;"
1584
2017
" cannot bind to interface %s",
1585
2018
self.interface)
2019
elif error.errno == errno.ENODEV:
2020
logger.error("Interface %s does not exist,"
2021
" cannot bind", self.interface)
1586
2022
else:
1587
2023
raise
1588
2024
# Only bind(2) the socket if we really need to.
1591
2027
if self.address_family == socket.AF_INET6:
1592
2028
any_address = "::" # in6addr_any
1593
2029
else:
1594
any_address = socket.INADDR_ANY
2030
any_address = "0.0.0.0" # INADDR_ANY
1595
2031
self.server_address = (any_address,
1596
2032
self.server_address[1])
1597
2033
elif not self.server_address[1]:
1598
self.server_address = (self.server_address[0],
1599
0)
2034
self.server_address = (self.server_address[0], 0)
1600
2035
# if self.interface:
1601
2036
# self.server_address = (self.server_address[0],
1602
2037
# 0, # port
1616
2051
1617
2052
Assumes a gobject.MainLoop event loop.
1618
2053
"""
2054
1619
2055
def __init__(self, server_address, RequestHandlerClass,
1620
interface=None, use_ipv6=True, clients=None,
1621
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):
1622
2062
self.enabled = False
1623
2063
self.clients = clients
1624
2064
if self.clients is None:
1625
self.clients = set()
2065
self.clients = {}
1626
2066
self.use_dbus = use_dbus
1627
2067
self.gnutls_priority = gnutls_priority
1628
2068
IPv6_TCPServer.__init__(self, server_address,
1629
2069
RequestHandlerClass,
1630
2070
interface = interface,
1631
use_ipv6 = use_ipv6)
2071
use_ipv6 = use_ipv6,
2072
socketfd = socketfd)
2073
1632
2074
def server_activate(self):
1633
2075
if self.enabled:
1634
2076
return socketserver.TCPServer.server_activate(self)
1638
2080
1639
2081
def add_pipe(self, parent_pipe, proc):
1640
2082
# Call "handle_ipc" for both data and EOF events
1641
gobject.io_add_watch(parent_pipe.fileno(),
1642
gobject.IO_IN | gobject.IO_HUP,
1643
functools.partial(self.handle_ipc,
1644
parent_pipe =
1645
parent_pipe,
1646
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))
1647
2089
1648
def handle_ipc(self, source, condition, parent_pipe=None,
1649
proc = None, client_object=None):
1650
condition_names = {
1651
gobject.IO_IN: "IN", # There is data to read.
1652
gobject.IO_OUT: "OUT", # Data can be written (without
1653
# blocking).
1654
gobject.IO_PRI: "PRI", # There is urgent data to read.
1655
gobject.IO_ERR: "ERR", # Error condition.
1656
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1657
# broken, usually for pipes and
1658
# sockets).
1659
}
1660
conditions_string = ' | '.join(name
1661
for cond, name in
1662
condition_names.iteritems()
1663
if cond & condition)
1664
# error or the other end of multiprocessing.Pipe has closed
1665
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2090
def handle_ipc(self, source, condition,
2091
parent_pipe=None,
2092
proc = None,
2093
client_object=None):
2094
# error, or the other end of multiprocessing.Pipe has closed
2095
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2096
# Wait for other process to exit
1666
2097
proc.join()
1667
2098
return False
1668
2099
1674
2105
fpr = request[1]
1675
2106
address = request[2]
1676
2107
1677
for c in self.clients:
2108
for c in self.clients.itervalues():
1678
2109
if c.fingerprint == fpr:
1679
2110
client = c
1680
2111
break
1688
2119
parent_pipe.send(False)
1689
2120
return False
1690
2121
1691
gobject.io_add_watch(parent_pipe.fileno(),
1692
gobject.IO_IN | gobject.IO_HUP,
1693
functools.partial(self.handle_ipc,
1694
parent_pipe =
1695
parent_pipe,
1696
proc = proc,
1697
client_object =
1698
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))
1699
2129
parent_pipe.send(True)
1700
2130
# remove the old hook in favor of the new above hook on
1701
2131
# same fileno
1707
2137
1708
2138
parent_pipe.send(('data', getattr(client_object,
1709
2139
funcname)(*args,
1710
**kwargs)))
2140
**kwargs)))
1711
2141
1712
2142
if command == 'getattr':
1713
2143
attrname = request[1]
1714
if callable(client_object.__getattribute__(attrname)):
1715
parent_pipe.send(('function',))
2144
if isinstance(client_object.__getattribute__(attrname),
2145
collections.Callable):
2146
parent_pipe.send(('function', ))
1716
2147
else:
1717
parent_pipe.send(('data', client_object
1718
.__getattribute__(attrname)))
2148
parent_pipe.send((
2149
'data', client_object.__getattribute__(attrname)))
1719
2150
1720
2151
if command == 'setattr':
1721
2152
attrname = request[1]
1725
2156
return True
1726
2157
1727
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
1728
2255
def string_to_delta(interval):
1729
2256
"""Parse a string and return a datetime.timedelta
1730
2257
1741
2268
>>> string_to_delta('5m 30s')
1742
2269
datetime.timedelta(0, 330)
1743
2270
"""
2271
2272
try:
2273
return rfc3339_duration_to_delta(interval)
2274
except ValueError:
2275
pass
2276
1744
2277
timevalue = datetime.timedelta(0)
1745
2278
for s in interval.split():
1746
2279
try:
1747
suffix = unicode(s[-1])
2280
suffix = s[-1]
1748
2281
value = int(s[:-1])
1749
2282
if suffix == "d":
1750
2283
delta = datetime.timedelta(value)
1757
2290
elif suffix == "w":
1758
2291
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1759
2292
else:
1760
raise ValueError("Unknown suffix %r" % suffix)
1761
except (ValueError, IndexError) as e:
2293
raise ValueError("Unknown suffix {!r}".format(suffix))
2294
except IndexError as e:
1762
2295
raise ValueError(*(e.args))
1763
2296
timevalue += delta
1764
2297
return timevalue
1765
2298
1766
2299
1767
def if_nametoindex(interface):
1768
"""Call the C function if_nametoindex(), or equivalent
1769
1770
Note: This function cannot accept a unicode string."""
1771
global if_nametoindex
1772
try:
1773
if_nametoindex = (ctypes.cdll.LoadLibrary
1774
(ctypes.util.find_library("c"))
1775
.if_nametoindex)
1776
except (OSError, AttributeError):
1777
logger.warning("Doing if_nametoindex the hard way")
1778
def if_nametoindex(interface):
1779
"Get an interface index the hard way, i.e. using fcntl()"
1780
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1781
with contextlib.closing(socket.socket()) as s:
1782
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1783
struct.pack(str("16s16x"),
1784
interface))
1785
interface_index = struct.unpack(str("I"),
1786
ifreq[16:20])[0]
1787
return interface_index
1788
return if_nametoindex(interface)
1789
1790
1791
2300
def daemon(nochdir = False, noclose = False):
1792
2301
"""See daemon(3). Standard BSD Unix function.
1793
2302
1801
2310
sys.exit()
1802
2311
if not noclose:
1803
2312
# Close all standard open file descriptors
1804
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2313
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1805
2314
if not stat.S_ISCHR(os.fstat(null).st_mode):
1806
2315
raise OSError(errno.ENODEV,
1807
"%s not a character device"
1808
% os.path.devnull)
2316
"{} not a character device"
2317
.format(os.devnull))
1809
2318
os.dup2(null, sys.stdin.fileno())
1810
2319
os.dup2(null, sys.stdout.fileno())
1811
2320
os.dup2(null, sys.stderr.fileno())
1820
2329
1821
2330
parser = argparse.ArgumentParser()
1822
2331
parser.add_argument("-v", "--version", action="version",
1823
version = "%%(prog)s %s" % version,
2332
version = "%(prog)s {}".format(version),
1824
2333
help="show version number and exit")
1825
2334
parser.add_argument("-i", "--interface", metavar="IF",
1826
2335
help="Bind to interface IF")
1832
2341
help="Run self-test")
1833
2342
parser.add_argument("--debug", action="store_true",
1834
2343
help="Debug mode; run in foreground and log"
1835
" to terminal")
2344
" to terminal", default=None)
1836
2345
parser.add_argument("--debuglevel", metavar="LEVEL",
1837
2346
help="Debug level for stdout output")
1838
2347
parser.add_argument("--priority", help="GnuTLS"
1845
2354
" files")
1846
2355
parser.add_argument("--no-dbus", action="store_false",
1847
2356
dest="use_dbus", help="Do not provide D-Bus"
1848
" system bus interface")
2357
" system bus interface", default=None)
1849
2358
parser.add_argument("--no-ipv6", action="store_false",
1850
dest="use_ipv6", help="Do not use IPv6")
2359
dest="use_ipv6", help="Do not use IPv6",
2360
default=None)
2361
parser.add_argument("--no-restore", action="store_false",
2362
dest="restore", help="Do not restore stored"
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")
2367
parser.add_argument("--statedir", metavar="DIR",
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)
2374
1851
2375
options = parser.parse_args()
1852
2376
1853
2377
if options.check:
1854
2378
import doctest
1855
doctest.testmod()
1856
sys.exit()
2379
fail_count, test_count = doctest.testmod()
2380
sys.exit(os.EX_OK if fail_count == 0 else 1)
1857
2381
1858
2382
# Default values for config file for server-global settings
1859
2383
server_defaults = { "interface": "",
1861
2385
"port": "",
1862
2386
"debug": "False",
1863
2387
"priority":
1864
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2388
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2389
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1865
2390
"servicename": "Mandos",
1866
2391
"use_dbus": "True",
1867
2392
"use_ipv6": "True",
1868
2393
"debuglevel": "",
1869
}
2394
"restore": "True",
2395
"socket": "",
2396
"statedir": "/var/lib/mandos",
2397
"foreground": "False",
2398
"zeroconf": "True",
2399
}
1870
2400
1871
2401
# Parse config file for server-global settings
1872
2402
server_config = configparser.SafeConfigParser(server_defaults)
1873
2403
del server_defaults
1874
server_config.read(os.path.join(options.configdir,
1875
"mandos.conf"))
2404
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1876
2405
# Convert the SafeConfigParser object to a dict
1877
2406
server_settings = server_config.defaults()
1878
2407
# Use the appropriate methods on the non-string config options
1879
for option in ("debug", "use_dbus", "use_ipv6"):
2408
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1880
2409
server_settings[option] = server_config.getboolean("DEFAULT",
1881
2410
option)
1882
2411
if server_settings["port"]:
1883
2412
server_settings["port"] = server_config.getint("DEFAULT",
1884
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"])
1885
2423
del server_config
1886
2424
1887
2425
# Override the settings from the config file with command line
1888
2426
# options, if set.
1889
2427
for option in ("interface", "address", "port", "debug",
1890
"priority", "servicename", "configdir",
1891
"use_dbus", "use_ipv6", "debuglevel"):
2428
"priority", "servicename", "configdir", "use_dbus",
2429
"use_ipv6", "debuglevel", "restore", "statedir",
2430
"socket", "foreground", "zeroconf"):
1892
2431
value = getattr(options, option)
1893
2432
if value is not None:
1894
2433
server_settings[option] = value
1895
2434
del options
1896
2435
# Force all strings to be unicode
1897
2436
for option in server_settings.keys():
1898
if type(server_settings[option]) is str:
1899
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
1900
2447
# Now we have our good server settings in "server_settings"
1901
2448
1902
2449
##################################################################
1903
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
1904
2456
# For convenience
1905
2457
debug = server_settings["debug"]
1906
2458
debuglevel = server_settings["debuglevel"]
1907
2459
use_dbus = server_settings["use_dbus"]
1908
2460
use_ipv6 = server_settings["use_ipv6"]
2461
stored_state_path = os.path.join(server_settings["statedir"],
2462
stored_state_file)
2463
foreground = server_settings["foreground"]
2464
zeroconf = server_settings["zeroconf"]
2465
2466
if debug:
2467
initlogger(debug, logging.DEBUG)
2468
else:
2469
if not debuglevel:
2470
initlogger(debug)
2471
else:
2472
level = getattr(logging, debuglevel.upper())
2473
initlogger(debug, level)
1909
2474
1910
2475
if server_settings["servicename"] != "Mandos":
1911
syslogger.setFormatter(logging.Formatter
1912
('Mandos (%s) [%%(process)d]:'
1913
' %%(levelname)s: %%(message)s'
1914
% server_settings["servicename"]))
2476
syslogger.setFormatter(
2477
logging.Formatter('Mandos ({}) [%(process)d]:'
2478
' %(levelname)s: %(message)s'.format(
2479
server_settings["servicename"])))
1915
2480
1916
2481
# Parse config file with clients
1917
client_defaults = { "timeout": "5m",
1918
"extended_timeout": "15m",
1919
"interval": "2m",
1920
"checker": "fping -q -- %%(host)s",
1921
"host": "",
1922
"approval_delay": "0s",
1923
"approval_duration": "1s",
1924
}
1925
client_config = configparser.SafeConfigParser(client_defaults)
2482
client_config = configparser.SafeConfigParser(Client
2483
.client_defaults)
1926
2484
client_config.read(os.path.join(server_settings["configdir"],
1927
2485
"clients.conf"))
1928
2486
1929
2487
global mandos_dbus_service
1930
2488
mandos_dbus_service = None
1931
2489
1932
tcp_server = MandosServer((server_settings["address"],
1933
server_settings["port"]),
1934
ClientHandler,
1935
interface=(server_settings["interface"]
1936
or None),
1937
use_ipv6=use_ipv6,
1938
gnutls_priority=
1939
server_settings["priority"],
1940
use_dbus=use_dbus)
1941
if not debug:
1942
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
1943
2506
try:
1944
pidfile = open(pidfilename, "w")
1945
except IOError:
1946
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)
1947
2511
1948
try:
1949
uid = pwd.getpwnam("_mandos").pw_uid
1950
gid = pwd.getpwnam("_mandos").pw_gid
1951
except KeyError:
2512
for name in ("_mandos", "mandos", "nobody"):
1952
2513
try:
1953
uid = pwd.getpwnam("mandos").pw_uid
1954
gid = pwd.getpwnam("mandos").pw_gid
2514
uid = pwd.getpwnam(name).pw_uid
2515
gid = pwd.getpwnam(name).pw_gid
2516
break
1955
2517
except KeyError:
1956
try:
1957
uid = pwd.getpwnam("nobody").pw_uid
1958
gid = pwd.getpwnam("nobody").pw_gid
1959
except KeyError:
1960
uid = 65534
1961
gid = 65534
2518
continue
2519
else:
2520
uid = 65534
2521
gid = 65534
1962
2522
try:
1963
2523
os.setgid(gid)
1964
2524
os.setuid(uid)
1965
2525
except OSError as error:
1966
if error[0] != errno.EPERM:
1967
raise error
1968
1969
if not debug and not debuglevel:
1970
syslogger.setLevel(logging.WARNING)
1971
console.setLevel(logging.WARNING)
1972
if debuglevel:
1973
level = getattr(logging, debuglevel.upper())
1974
syslogger.setLevel(level)
1975
console.setLevel(level)
2526
if error.errno != errno.EPERM:
2527
raise
1976
2528
1977
2529
if debug:
1978
2530
# Enable all possible GnuTLS debugging
1985
2537
def debug_gnutls(level, string):
1986
2538
logger.debug("GnuTLS: %s", string[:-1])
1987
2539
1988
(gnutls.library.functions
1989
.gnutls_global_set_log_function(debug_gnutls))
2540
gnutls.library.functions.gnutls_global_set_log_function(
2541
debug_gnutls)
1990
2542
1991
2543
# Redirect stdin so all checkers get /dev/null
1992
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2544
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1993
2545
os.dup2(null, sys.stdin.fileno())
1994
2546
if null > 2:
1995
2547
os.close(null)
1996
else:
1997
# No console logging
1998
logger.removeHandler(console)
1999
2548
2000
2549
# Need to fork before connecting to D-Bus
2001
if not debug:
2550
if not foreground:
2002
2551
# Close all input and output, do double fork, etc.
2003
2552
daemon()
2004
2553
2554
# multiprocessing will use threads, so before we use gobject we
2555
# need to inform gobject that threads will be used.
2556
gobject.threads_init()
2557
2005
2558
global main_loop
2006
2559
# From the Avahi example code
2007
DBusGMainLoop(set_as_default=True )
2560
DBusGMainLoop(set_as_default=True)
2008
2561
main_loop = gobject.MainLoop()
2009
2562
bus = dbus.SystemBus()
2010
2563
# End of Avahi example code
2011
2564
if use_dbus:
2012
2565
try:
2013
2566
bus_name = dbus.service.BusName("se.recompile.Mandos",
2014
bus, do_not_queue=True)
2015
old_bus_name = (dbus.service.BusName
2016
("se.bsnet.fukt.Mandos", bus,
2017
do_not_queue=True))
2018
except dbus.exceptions.NameExistsException as e:
2019
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)
2020
2574
use_dbus = False
2021
2575
server_settings["use_dbus"] = False
2022
2576
tcp_server.use_dbus = False
2023
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2024
service = AvahiService(name = server_settings["servicename"],
2025
servicetype = "_mandos._tcp",
2026
protocol = protocol, bus = bus)
2027
if server_settings["interface"]:
2028
service.interface = (if_nametoindex
2029
(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"))
2030
2587
2031
2588
global multiprocessing_manager
2032
2589
multiprocessing_manager = multiprocessing.Manager()
2033
2590
2034
2591
client_class = Client
2035
2592
if use_dbus:
2036
client_class = functools.partial(ClientDBusTransitional,
2037
bus = bus)
2038
def client_config_items(config, section):
2039
special_settings = {
2040
"approved_by_default":
2041
lambda: config.getboolean(section,
2042
"approved_by_default"),
2043
}
2044
for name, value in config.items(section):
2593
client_class = functools.partial(ClientDBus, bus = bus)
2594
2595
client_settings = Client.config_parser(client_config)
2596
old_client_settings = {}
2597
clients_data = {}
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
2607
# Get client data and settings from last running state.
2608
if server_settings["restore"]:
2609
try:
2610
with open(stored_state_path, "rb") as stored_state:
2611
clients_data, old_client_settings = pickle.load(
2612
stored_state)
2613
os.remove(stored_state_path)
2614
except IOError as e:
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)
2621
raise
2622
except EOFError as e:
2623
logger.warning("Could not load persistent state: "
2624
"EOFError:",
2625
exc_info=e)
2626
2627
with PGPEngine() as pgp:
2628
for client_name, client in clients_data.items():
2629
# Skip removed clients
2630
if client_name not in client_settings:
2631
continue
2632
2633
# Decide which value to use after restoring saved state.
2634
# We have three different values: Old config file,
2635
# new config file, and saved state.
2636
# New config value takes precedence if it differs from old
2637
# config value, otherwise use saved state.
2638
for name, value in client_settings[client_name].items():
2639
try:
2640
# For each value in new config, check if it
2641
# differs from the old config value (Except for
2642
# the "secret" attribute)
2643
if (name != "secret"
2644
and (value !=
2645
old_client_settings[client_name][name])):
2646
client[name] = value
2647
except KeyError:
2648
pass
2649
2650
# Clients who has passed its expire date can still be
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.
2655
if client["enabled"]:
2656
if datetime.datetime.utcnow() >= client["expires"]:
2657
if not client["last_checked_ok"]:
2658
logger.warning(
2659
"disabling client {} - Client never "
2660
"performed a successful checker".format(
2661
client_name))
2662
client["enabled"] = False
2663
elif client["last_checker_status"] != 0:
2664
logger.warning(
2665
"disabling client {} - Client last"
2666
" checker failed with error code"
2667
" {}".format(
2668
client_name,
2669
client["last_checker_status"]))
2670
client["enabled"] = False
2671
else:
2672
client["expires"] = (
2673
datetime.datetime.utcnow()
2674
+ client["timeout"])
2675
logger.debug("Last checker succeeded,"
2676
" keeping {} enabled".format(
2677
client_name))
2045
2678
try:
2046
yield (name, special_settings[name]())
2047
except KeyError:
2048
yield (name, value)
2049
2050
tcp_server.clients.update(set(
2051
client_class(name = section,
2052
config= dict(client_config_items(
2053
client_config, section)))
2054
for section in client_config.sections()))
2679
client["secret"] = pgp.decrypt(
2680
client["encrypted_secret"],
2681
client_settings[client_name]["secret"])
2682
except PGPError:
2683
# If decryption fails, we use secret from new settings
2684
logger.debug("Failed to decrypt {} old secret".format(
2685
client_name))
2686
client["secret"] = (client_settings[client_name]
2687
["secret"])
2688
2689
# Add/remove clients based on new changes made to config
2690
for client_name in (set(old_client_settings)
2691
- set(client_settings)):
2692
del clients_data[client_name]
2693
for client_name in (set(client_settings)
2694
- set(old_client_settings)):
2695
clients_data[client_name] = client_settings[client_name]
2696
2697
# Create all client objects
2698
for client_name, client in clients_data.items():
2699
tcp_server.clients[client_name] = client_class(
2700
name = client_name,
2701
settings = client,
2702
server_settings = server_settings)
2703
2055
2704
if not tcp_server.clients:
2056
2705
logger.warning("No clients defined")
2057
2058
if not debug:
2059
try:
2060
with pidfile:
2061
pid = os.getpid()
2062
pidfile.write(str(pid) + "\n".encode("utf-8"))
2063
del pidfile
2064
except IOError:
2065
logger.error("Could not write to file %r with PID %d",
2066
pidfilename, pid)
2067
except NameError:
2068
# "pidfile" was never created
2069
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
2070
2717
del pidfilename
2071
2072
signal.signal(signal.SIGINT, signal.SIG_IGN)
2073
2718
2074
2719
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2075
2720
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2076
2721
2077
2722
if use_dbus:
2078
class MandosDBusService(dbus.service.Object):
2723
2724
@alternate_dbus_interfaces(
2725
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2726
class MandosDBusService(DBusObjectWithProperties):
2079
2727
"""A D-Bus proxy object"""
2728
2080
2729
def __init__(self):
2081
2730
dbus.service.Object.__init__(self, bus, "/")
2731
2082
2732
_interface = "se.recompile.Mandos"
2083
2733
2734
@dbus_interface_annotations(_interface)
2735
def _foo(self):
2736
return {
2737
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2738
"false" }
2739
2084
2740
@dbus.service.signal(_interface, signature="o")
2085
2741
def ClientAdded(self, objpath):
2086
2742
"D-Bus signal"
2099
2755
@dbus.service.method(_interface, out_signature="ao")
2100
2756
def GetAllClients(self):
2101
2757
"D-Bus method"
2102
return dbus.Array(c.dbus_object_path
2103
for c in tcp_server.clients)
2758
return dbus.Array(c.dbus_object_path for c in
2759
tcp_server.clients.itervalues())
2104
2760
2105
2761
@dbus.service.method(_interface,
2106
2762
out_signature="a{oa{sv}}")
2107
2763
def GetAllClientsWithProperties(self):
2108
2764
"D-Bus method"
2109
2765
return dbus.Dictionary(
2110
((c.dbus_object_path, c.GetAll(""))
2111
for c in tcp_server.clients),
2766
{ c.dbus_object_path: c.GetAll("")
2767
for c in tcp_server.clients.itervalues() },
2112
2768
signature="oa{sv}")
2113
2769
2114
2770
@dbus.service.method(_interface, in_signature="o")
2115
2771
def RemoveClient(self, object_path):
2116
2772
"D-Bus method"
2117
for c in tcp_server.clients:
2773
for c in tcp_server.clients.itervalues():
2118
2774
if c.dbus_object_path == object_path:
2119
tcp_server.clients.remove(c)
2775
del tcp_server.clients[c.name]
2120
2776
c.remove_from_connection()
2121
2777
# Don't signal anything except ClientRemoved
2122
2778
c.disable(quiet=True)
2127
2783
2128
2784
del _interface
2129
2785
2130
class MandosDBusServiceTransitional(MandosDBusService):
2131
__metaclass__ = AlternateDBusNamesMetaclass
2132
mandos_dbus_service = MandosDBusServiceTransitional()
2786
mandos_dbus_service = MandosDBusService()
2133
2787
2134
2788
def cleanup():
2135
2789
"Cleanup function; run on exit"
2136
service.cleanup()
2790
if zeroconf:
2791
service.cleanup()
2137
2792
2138
2793
multiprocessing.active_children()
2794
wnull.close()
2795
if not (tcp_server.clients or client_settings):
2796
return
2797
2798
# Store client before exiting. Secrets are encrypted with key
2799
# based on what config file has. If config file is
2800
# removed/edited, old secret will thus be unrecovable.
2801
clients = {}
2802
with PGPEngine() as pgp:
2803
for client in tcp_server.clients.itervalues():
2804
key = client_settings[client.name]["secret"]
2805
client.encrypted_secret = pgp.encrypt(client.secret,
2806
key)
2807
client_dict = {}
2808
2809
# A list of attributes that can not be pickled
2810
# + secret.
2811
exclude = { "bus", "changedstate", "secret",
2812
"checker", "server_settings" }
2813
for name, typ in inspect.getmembers(dbus.service
2814
.Object):
2815
exclude.add(name)
2816
2817
client_dict["encrypted_secret"] = (client
2818
.encrypted_secret)
2819
for attr in client.client_structure:
2820
if attr not in exclude:
2821
client_dict[attr] = getattr(client, attr)
2822
2823
clients[client.name] = client_dict
2824
del client_settings[client.name]["secret"]
2825
2826
try:
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:
2833
pickle.dump((clients, client_settings), stored_state)
2834
tempname = stored_state.name
2835
os.rename(tempname, stored_state_path)
2836
except (IOError, OSError) as e:
2837
if not debug:
2838
try:
2839
os.remove(tempname)
2840
except NameError:
2841
pass
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
2849
2850
# Delete all clients, and settings from config
2139
2851
while tcp_server.clients:
2140
client = tcp_server.clients.pop()
2852
name, client = tcp_server.clients.popitem()
2141
2853
if use_dbus:
2142
2854
client.remove_from_connection()
2143
client.disable_hook = None
2144
2855
# Don't signal anything except ClientRemoved
2145
2856
client.disable(quiet=True)
2146
2857
if use_dbus:
2147
2858
# Emit D-Bus signal
2148
mandos_dbus_service.ClientRemoved(client
2149
.dbus_object_path,
2150
client.name)
2859
mandos_dbus_service.ClientRemoved(
2860
client.dbus_object_path, client.name)
2861
client_settings.clear()
2151
2862
2152
2863
atexit.register(cleanup)
2153
2864
2154
for client in tcp_server.clients:
2865
for client in tcp_server.clients.itervalues():
2155
2866
if use_dbus:
2156
2867
# Emit D-Bus signal
2157
2868
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2158
client.enable()
2869
# Need to initiate checking of clients
2870
if client.enabled:
2871
client.init_checker()
2159
2872
2160
2873
tcp_server.enable()
2161
2874
tcp_server.server_activate()
2162
2875
2163
2876
# Find out what port we got
2164
service.port = tcp_server.socket.getsockname()[1]
2877
if zeroconf:
2878
service.port = tcp_server.socket.getsockname()[1]
2165
2879
if use_ipv6:
2166
2880
logger.info("Now listening on address %r, port %d,"
2167
" flowinfo %d, scope_id %d"
2168
% tcp_server.socket.getsockname())
2881
" flowinfo %d, scope_id %d",
2882
*tcp_server.socket.getsockname())
2169
2883
else: # IPv4
2170
logger.info("Now listening on address %r, port %d"
2171
% tcp_server.socket.getsockname())
2884
logger.info("Now listening on address %r, port %d",
2885
*tcp_server.socket.getsockname())
2172
2886
2173
2887
#service.interface = tcp_server.socket.getsockname()[3]
2174
2888
2175
2889
try:
2176
# From the Avahi example code
2177
try:
2178
service.activate()
2179
except dbus.exceptions.DBusException as error:
2180
logger.critical("DBusException: %s", error)
2181
cleanup()
2182
sys.exit(1)
2183
# 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
2184
2899
2185
2900
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2186
2901
lambda *args, **kwargs:
2190
2905
logger.debug("Starting main loop")
2191
2906
main_loop.run()
2192
2907
except AvahiError as error:
2193
logger.critical("AvahiError: %s", error)
2908
logger.critical("Avahi Error", exc_info=error)
2194
2909
cleanup()
2195
2910
sys.exit(1)
2196
2911
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0