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- Committer: Teddy Hogeborn
- Date: 2011-11-29 18:19:31 UTC
- mto: (237.15.13 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111129181931-vctlij1omtu1qbnx
* initramfs-tools-hook: Set DEVICE for network hooks.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
37
import SocketServer as socketserver
43
38
import socket
44
39
import argparse
45
40
import datetime
50
45
import gnutls.library.functions
51
46
import gnutls.library.constants
52
47
import gnutls.library.types
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
48
import ConfigParser as configparser
57
49
import sys
58
50
import re
59
51
import os
68
60
import struct
69
61
import fcntl
70
62
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
63
import cPickle as pickle
75
64
import multiprocessing
76
65
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
81
66
82
67
import dbus
83
68
import dbus.service
84
try:
85
import gobject
86
except ImportError:
87
from gi.repository import GObject as gobject
69
import gobject
88
70
import avahi
89
71
from dbus.mainloop.glib import DBusGMainLoop
90
72
import ctypes
100
82
except ImportError:
101
83
SO_BINDTODEVICE = None
102
84
103
if sys.version_info.major == 2:
104
str = unicode
105
106
version = "1.6.9"
107
stored_state_file = "clients.pickle"
108
109
logger = logging.getLogger()
110
syslogger = None
111
112
try:
113
if_nametoindex = ctypes.cdll.LoadLibrary(
114
ctypes.util.find_library("c")).if_nametoindex
115
except (OSError, AttributeError):
116
117
def if_nametoindex(interface):
118
"Get an interface index the hard way, i.e. using fcntl()"
119
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
120
with contextlib.closing(socket.socket()) as s:
121
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
122
struct.pack(b"16s16x", interface))
123
interface_index = struct.unpack("I", ifreq[16:20])[0]
124
return interface_index
125
126
127
def initlogger(debug, level=logging.WARNING):
128
"""init logger and add loglevel"""
129
130
global syslogger
131
syslogger = (logging.handlers.SysLogHandler(
132
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
address = "/dev/log"))
134
syslogger.setFormatter(logging.Formatter
135
('Mandos [%(process)d]: %(levelname)s:'
136
' %(message)s'))
137
logger.addHandler(syslogger)
138
139
if debug:
140
console = logging.StreamHandler()
141
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
142
' [%(process)d]:'
143
' %(levelname)s:'
144
' %(message)s'))
145
logger.addHandler(console)
146
logger.setLevel(level)
147
148
149
class PGPError(Exception):
150
"""Exception if encryption/decryption fails"""
151
pass
152
153
154
class PGPEngine(object):
155
"""A simple class for OpenPGP symmetric encryption & decryption"""
156
157
def __init__(self):
158
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
159
self.gnupgargs = ['--batch',
160
'--home', self.tempdir,
161
'--force-mdc',
162
'--quiet',
163
'--no-use-agent']
164
165
def __enter__(self):
166
return self
167
168
def __exit__(self, exc_type, exc_value, traceback):
169
self._cleanup()
170
return False
171
172
def __del__(self):
173
self._cleanup()
174
175
def _cleanup(self):
176
if self.tempdir is not None:
177
# Delete contents of tempdir
178
for root, dirs, files in os.walk(self.tempdir,
179
topdown = False):
180
for filename in files:
181
os.remove(os.path.join(root, filename))
182
for dirname in dirs:
183
os.rmdir(os.path.join(root, dirname))
184
# Remove tempdir
185
os.rmdir(self.tempdir)
186
self.tempdir = None
187
188
def password_encode(self, password):
189
# Passphrase can not be empty and can not contain newlines or
190
# NUL bytes. So we prefix it and hex encode it.
191
encoded = b"mandos" + binascii.hexlify(password)
192
if len(encoded) > 2048:
193
# GnuPG can't handle long passwords, so encode differently
194
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
195
.replace(b"\n", b"\\n")
196
.replace(b"\0", b"\\x00"))
197
return encoded
198
199
def encrypt(self, data, password):
200
passphrase = self.password_encode(password)
201
with tempfile.NamedTemporaryFile(
202
dir=self.tempdir) as passfile:
203
passfile.write(passphrase)
204
passfile.flush()
205
proc = subprocess.Popen(['gpg', '--symmetric',
206
'--passphrase-file',
207
passfile.name]
208
+ self.gnupgargs,
209
stdin = subprocess.PIPE,
210
stdout = subprocess.PIPE,
211
stderr = subprocess.PIPE)
212
ciphertext, err = proc.communicate(input = data)
213
if proc.returncode != 0:
214
raise PGPError(err)
215
return ciphertext
216
217
def decrypt(self, data, password):
218
passphrase = self.password_encode(password)
219
with tempfile.NamedTemporaryFile(
220
dir = self.tempdir) as passfile:
221
passfile.write(passphrase)
222
passfile.flush()
223
proc = subprocess.Popen(['gpg', '--decrypt',
224
'--passphrase-file',
225
passfile.name]
226
+ self.gnupgargs,
227
stdin = subprocess.PIPE,
228
stdout = subprocess.PIPE,
229
stderr = subprocess.PIPE)
230
decrypted_plaintext, err = proc.communicate(input = data)
231
if proc.returncode != 0:
232
raise PGPError(err)
233
return decrypted_plaintext
234
85
86
version = "1.4.1"
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)
235
103
236
104
class AvahiError(Exception):
237
105
def __init__(self, value, *args, **kwargs):
238
106
self.value = value
239
return super(AvahiError, self).__init__(value, *args,
240
**kwargs)
241
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
242
110
243
111
class AvahiServiceError(AvahiError):
244
112
pass
245
113
246
247
114
class AvahiGroupError(AvahiError):
248
115
pass
249
116
256
123
Used to optionally bind to the specified interface.
257
124
name: string; Example: 'Mandos'
258
125
type: string; Example: '_mandos._tcp'.
259
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
260
127
port: integer; what port to announce
261
128
TXT: list of strings; TXT record for the service
262
129
domain: string; Domain to publish on, default to .local if empty.
268
135
server: D-Bus Server
269
136
bus: dbus.SystemBus()
270
137
"""
271
272
def __init__(self,
273
interface = avahi.IF_UNSPEC,
274
name = None,
275
servicetype = None,
276
port = None,
277
TXT = None,
278
domain = "",
279
host = "",
280
max_renames = 32768,
281
protocol = avahi.PROTO_UNSPEC,
282
bus = None):
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):
283
142
self.interface = interface
284
143
self.name = name
285
144
self.type = servicetype
294
153
self.server = None
295
154
self.bus = bus
296
155
self.entry_group_state_changed_match = None
297
298
def rename(self, remove=True):
156
def rename(self):
299
157
"""Derived from the Avahi example code"""
300
158
if self.rename_count >= self.max_renames:
301
159
logger.critical("No suitable Zeroconf service name found"
302
160
" after %i retries, exiting.",
303
161
self.rename_count)
304
162
raise AvahiServiceError("Too many renames")
305
self.name = str(
306
self.server.GetAlternativeServiceName(self.name))
307
self.rename_count += 1
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
308
165
logger.info("Changing Zeroconf service name to %r ...",
309
166
self.name)
310
if remove:
311
self.remove()
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
312
172
try:
313
173
self.add()
314
174
except dbus.exceptions.DBusException as error:
315
if (error.get_dbus_name()
316
== "org.freedesktop.Avahi.CollisionError"):
317
logger.info("Local Zeroconf service name collision.")
318
return self.rename(remove=False)
319
else:
320
logger.critical("D-Bus Exception", exc_info=error)
321
self.cleanup()
322
os._exit(1)
323
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
324
179
def remove(self):
325
180
"""Derived from the Avahi example code"""
326
181
if self.entry_group_state_changed_match is not None:
328
183
self.entry_group_state_changed_match = None
329
184
if self.group is not None:
330
185
self.group.Reset()
331
332
186
def add(self):
333
187
"""Derived from the Avahi example code"""
334
188
self.remove()
339
193
avahi.DBUS_INTERFACE_ENTRY_GROUP)
340
194
self.entry_group_state_changed_match = (
341
195
self.group.connect_to_signal(
342
'StateChanged', self.entry_group_state_changed))
196
'StateChanged', self .entry_group_state_changed))
343
197
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
344
198
self.name, self.type)
345
199
self.group.AddService(
351
205
dbus.UInt16(self.port),
352
206
avahi.string_array_to_txt_array(self.TXT))
353
207
self.group.Commit()
354
355
208
def entry_group_state_changed(self, state, error):
356
209
"""Derived from the Avahi example code"""
357
210
logger.debug("Avahi entry group state change: %i", state)
363
216
self.rename()
364
217
elif state == avahi.ENTRY_GROUP_FAILURE:
365
218
logger.critical("Avahi: Error in group state changed %s",
366
str(error))
367
raise AvahiGroupError("State changed: {!s}".format(error))
368
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
369
222
def cleanup(self):
370
223
"""Derived from the Avahi example code"""
371
224
if self.group is not None:
372
225
try:
373
226
self.group.Free()
374
227
except (dbus.exceptions.UnknownMethodException,
375
dbus.exceptions.DBusException):
228
dbus.exceptions.DBusException) as e:
376
229
pass
377
230
self.group = None
378
231
self.remove()
379
380
232
def server_state_changed(self, state, error=None):
381
233
"""Derived from the Avahi example code"""
382
234
logger.debug("Avahi server state change: %i", state)
383
bad_states = {
384
avahi.SERVER_INVALID: "Zeroconf server invalid",
385
avahi.SERVER_REGISTERING: None,
386
avahi.SERVER_COLLISION: "Zeroconf server name collision",
387
avahi.SERVER_FAILURE: "Zeroconf server failure",
388
}
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" }
389
242
if state in bad_states:
390
243
if bad_states[state] is not None:
391
244
if error is None:
400
253
logger.debug("Unknown state: %r", state)
401
254
else:
402
255
logger.debug("Unknown state: %r: %r", state, error)
403
404
256
def activate(self):
405
257
"""Derived from the Avahi example code"""
406
258
if self.server is None:
410
262
follow_name_owner_changes=True),
411
263
avahi.DBUS_INTERFACE_SERVER)
412
264
self.server.connect_to_signal("StateChanged",
413
self.server_state_changed)
265
self.server_state_changed)
414
266
self.server_state_changed(self.server.GetState())
415
267
416
268
417
class AvahiServiceToSyslog(AvahiService):
418
def rename(self, *args, **kwargs):
419
"""Add the new name to the syslog messages"""
420
ret = AvahiService.rename(self, *args, **kwargs)
421
syslogger.setFormatter(logging.Formatter(
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
423
.format(self.name)))
424
return ret
425
426
def subprocess_call_pipe(connection, # : multiprocessing.Connection
427
*args, **kwargs):
428
"""This function is meant to be called by multiprocessing.Process
429
430
This function runs a synchronous subprocess.call(), and writes the
431
resulting return code on the provided multiprocessing.Connection.
432
"""
433
connection.send(subprocess.call(*args, **kwargs))
434
connection.close()
435
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
436
275
class Client(object):
437
276
"""A representation of a client host served by this server.
438
277
439
278
Attributes:
440
approved: bool(); 'None' if not yet approved/disapproved
279
_approved: bool(); 'None' if not yet approved/disapproved
441
280
approval_delay: datetime.timedelta(); Time to wait for approval
442
281
approval_duration: datetime.timedelta(); Duration of one approval
443
282
checker: subprocess.Popen(); a running checker process used
450
289
instance %(name)s can be used in the command.
451
290
checker_initiator_tag: a gobject event source tag, or None
452
291
created: datetime.datetime(); (UTC) object creation
453
client_structure: Object describing what attributes a client has
454
and is used for storing the client at exit
455
292
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
456
294
disable_initiator_tag: a gobject event source tag, or None
457
295
enabled: bool()
458
296
fingerprint: string (40 or 32 hexadecimal digits); used to
461
299
interval: datetime.timedelta(); How often to start a new checker
462
300
last_approval_request: datetime.datetime(); (UTC) or None
463
301
last_checked_ok: datetime.datetime(); (UTC) or None
464
last_checker_status: integer between 0 and 255 reflecting exit
465
status of last checker. -1 reflects crashed
466
checker, -2 means no checker completed yet.
467
last_checker_signal: The signal which killed the last checker, if
468
last_checker_status is -1
469
last_enabled: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
470
303
name: string; from the config file, used in log messages and
471
304
D-Bus identifiers
472
305
secret: bytestring; sent verbatim (over TLS) to client
473
306
timeout: datetime.timedelta(); How long from last_checked_ok
474
307
until this client is disabled
475
extended_timeout: extra long timeout when secret has been sent
308
extended_timeout: extra long timeout when password has been sent
476
309
runtime_expansions: Allowed attributes for runtime expansion.
477
310
expires: datetime.datetime(); time (UTC) when a client will be
478
311
disabled, or None
479
server_settings: The server_settings dict from main()
480
312
"""
481
313
482
314
runtime_expansions = ("approval_delay", "approval_duration",
483
"created", "enabled", "expires",
484
"fingerprint", "host", "interval",
485
"last_approval_request", "last_checked_ok",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
486
317
"last_enabled", "name", "timeout")
487
client_defaults = {
488
"timeout": "PT5M",
489
"extended_timeout": "PT15M",
490
"interval": "PT2M",
491
"checker": "fping -q -- %%(host)s",
492
"host": "",
493
"approval_delay": "PT0S",
494
"approval_duration": "PT1S",
495
"approved_by_default": "True",
496
"enabled": "True",
497
}
498
499
@staticmethod
500
def config_parser(config):
501
"""Construct a new dict of client settings of this form:
502
{ client_name: {setting_name: value, ...}, ...}
503
with exceptions for any special settings as defined above.
504
NOTE: Must be a pure function. Must return the same result
505
value given the same arguments.
506
"""
507
settings = {}
508
for client_name in config.sections():
509
section = dict(config.items(client_name))
510
client = settings[client_name] = {}
511
512
client["host"] = section["host"]
513
# Reformat values from string types to Python types
514
client["approved_by_default"] = config.getboolean(
515
client_name, "approved_by_default")
516
client["enabled"] = config.getboolean(client_name,
517
"enabled")
518
519
# Uppercase and remove spaces from fingerprint for later
520
# comparison purposes with return value from the
521
# fingerprint() function
522
client["fingerprint"] = (section["fingerprint"].upper()
523
.replace(" ", ""))
524
if "secret" in section:
525
client["secret"] = section["secret"].decode("base64")
526
elif "secfile" in section:
527
with open(os.path.expanduser(os.path.expandvars
528
(section["secfile"])),
529
"rb") as secfile:
530
client["secret"] = secfile.read()
531
else:
532
raise TypeError("No secret or secfile for section {}"
533
.format(section))
534
client["timeout"] = string_to_delta(section["timeout"])
535
client["extended_timeout"] = string_to_delta(
536
section["extended_timeout"])
537
client["interval"] = string_to_delta(section["interval"])
538
client["approval_delay"] = string_to_delta(
539
section["approval_delay"])
540
client["approval_duration"] = string_to_delta(
541
section["approval_duration"])
542
client["checker_command"] = section["checker"]
543
client["last_approval_request"] = None
544
client["last_checked_ok"] = None
545
client["last_checker_status"] = -2
546
547
return settings
548
549
def __init__(self, settings, name = None, server_settings=None):
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."""
550
338
self.name = name
551
if server_settings is None:
552
server_settings = {}
553
self.server_settings = server_settings
554
# adding all client settings
555
for setting, value in settings.items():
556
setattr(self, setting, value)
557
558
if self.enabled:
559
if not hasattr(self, "last_enabled"):
560
self.last_enabled = datetime.datetime.utcnow()
561
if not hasattr(self, "expires"):
562
self.expires = (datetime.datetime.utcnow()
563
+ self.timeout)
564
else:
565
self.last_enabled = None
566
self.expires = None
567
339
if config is None:
340
config = {}
568
341
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(" ", ""))
569
347
logger.debug(" Fingerprint: %s", self.fingerprint)
570
self.created = settings.get("created",
571
datetime.datetime.utcnow())
572
573
# attributes specific for this server instance
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
574
369
self.checker = None
575
370
self.checker_initiator_tag = None
576
371
self.disable_initiator_tag = None
372
self.expires = None
577
373
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
578
375
self.current_checker_command = None
579
self.approved = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
580
380
self.approvals_pending = 0
581
self.changedstate = multiprocessing_manager.Condition(
582
multiprocessing_manager.Lock())
583
self.client_structure = [attr
584
for attr in self.__dict__.iterkeys()
585
if not attr.startswith("_")]
586
self.client_structure.append("client_structure")
587
588
for name, t in inspect.getmembers(
589
type(self), lambda obj: isinstance(obj, property)):
590
if not name.startswith("_"):
591
self.client_structure.append(name)
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()))
592
388
593
# Send notice to process children that client state has changed
594
389
def send_changedstate(self):
595
with self.changedstate:
596
self.changedstate.notify_all()
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
597
393
598
394
def enable(self):
599
395
"""Start this client's checker and timeout hooks"""
600
396
if getattr(self, "enabled", False):
601
397
# Already enabled
602
398
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
603
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
604
410
self.enabled = True
605
411
self.last_enabled = datetime.datetime.utcnow()
606
self.init_checker()
607
self.send_changedstate()
412
# Also start a new checker *right now*.
413
self.start_checker()
608
414
609
415
def disable(self, quiet=True):
610
416
"""Disable this client."""
611
417
if not getattr(self, "enabled", False):
612
418
return False
613
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
614
422
logger.info("Disabling client %s", self.name)
615
if getattr(self, "disable_initiator_tag", None) is not None:
423
if getattr(self, "disable_initiator_tag", False):
616
424
gobject.source_remove(self.disable_initiator_tag)
617
425
self.disable_initiator_tag = None
618
426
self.expires = None
619
if getattr(self, "checker_initiator_tag", None) is not None:
427
if getattr(self, "checker_initiator_tag", False):
620
428
gobject.source_remove(self.checker_initiator_tag)
621
429
self.checker_initiator_tag = None
622
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
623
433
self.enabled = False
624
if not quiet:
625
self.send_changedstate()
626
434
# Do not run this again if called by a gobject.timeout_add
627
435
return False
628
436
629
437
def __del__(self):
438
self.disable_hook = None
630
439
self.disable()
631
440
632
def init_checker(self):
633
# Schedule a new checker to be started an 'interval' from now,
634
# and every interval from then on.
635
if self.checker_initiator_tag is not None:
636
gobject.source_remove(self.checker_initiator_tag)
637
self.checker_initiator_tag = gobject.timeout_add(
638
int(self.interval.total_seconds() * 1000),
639
self.start_checker)
640
# Schedule a disable() when 'timeout' has passed
641
if self.disable_initiator_tag is not None:
642
gobject.source_remove(self.disable_initiator_tag)
643
self.disable_initiator_tag = gobject.timeout_add(
644
int(self.timeout.total_seconds() * 1000), self.disable)
645
# Also start a new checker *right now*.
646
self.start_checker()
647
648
def checker_callback(self, source, condition,
649
(connection, command)):
441
def checker_callback(self, pid, condition, command):
650
442
"""The checker has completed, so take appropriate actions."""
651
443
self.checker_callback_tag = None
652
444
self.checker = None
653
# Read return code from connection (see subprocess_call_pipe)
654
returncode = connection.recv()
655
connection.close()
656
657
if returncode >= 0:
658
self.last_checker_status = returncode
659
self.last_checker_signal = None
660
if self.last_checker_status == 0:
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
661
448
logger.info("Checker for %(name)s succeeded",
662
449
vars(self))
663
450
self.checked_ok()
664
451
else:
665
logger.info("Checker for %(name)s failed", vars(self))
452
logger.info("Checker for %(name)s failed",
453
vars(self))
666
454
else:
667
self.last_checker_status = -1
668
self.last_checker_signal = -returncode
669
455
logger.warning("Checker for %(name)s crashed?",
670
456
vars(self))
671
return False
672
673
def checked_ok(self):
674
"""Assert that the client has been seen, alive and well."""
675
self.last_checked_ok = datetime.datetime.utcnow()
676
self.last_checker_status = 0
677
self.last_checker_signal = None
678
self.bump_timeout()
679
680
def bump_timeout(self, timeout=None):
681
"""Bump up the timeout for this client."""
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
"""
682
464
if timeout is None:
683
465
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
684
467
if self.disable_initiator_tag is not None:
685
468
gobject.source_remove(self.disable_initiator_tag)
686
self.disable_initiator_tag = None
687
469
if getattr(self, "enabled", False):
688
self.disable_initiator_tag = gobject.timeout_add(
689
int(timeout.total_seconds() * 1000), self.disable)
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
690
473
self.expires = datetime.datetime.utcnow() + timeout
691
474
692
475
def need_approval(self):
698
481
If a checker already exists, leave it running and do
699
482
nothing."""
700
483
# The reason for not killing a running checker is that if we
701
# did that, and if a checker (for some reason) started running
702
# slowly and taking more than 'interval' time, then the client
703
# would inevitably timeout, since no checker would get a
704
# chance to run to completion. If we instead leave running
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
705
488
# checkers alone, the checker would have to take more time
706
489
# than 'timeout' for the client to be disabled, which is as it
707
490
# should be.
708
491
709
if self.checker is not None and not self.checker.is_alive():
710
logger.warning("Checker was not alive; joining")
711
self.checker.join()
712
self.checker = None
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
self.current_checker_command)
713
505
# Start a new checker if needed
714
506
if self.checker is None:
715
# Escape attributes for the shell
716
escaped_attrs = {
717
attr: re.escape(str(getattr(self, attr)))
718
for attr in self.runtime_expansions }
719
507
try:
720
command = self.checker_command % escaped_attrs
721
except TypeError as error:
722
logger.error('Could not format string "%s"',
723
self.checker_command,
724
exc_info=error)
725
return True # Try again later
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
726
526
self.current_checker_command = command
727
logger.info("Starting checker %r for %s", command,
728
self.name)
729
# We don't need to redirect stdout and stderr, since
730
# in normal mode, that is already done by daemon(),
731
# and in debug mode we don't want to. (Stdin is
732
# always replaced by /dev/null.)
733
# The exception is when not debugging but nevertheless
734
# running in the foreground; use the previously
735
# created wnull.
736
popen_args = { "close_fds": True,
737
"shell": True,
738
"cwd": "/" }
739
if (not self.server_settings["debug"]
740
and self.server_settings["foreground"]):
741
popen_args.update({"stdout": wnull,
742
"stderr": wnull })
743
pipe = multiprocessing.Pipe(duplex=False)
744
self.checker = multiprocessing.Process(
745
target=subprocess_call_pipe, args=(pipe[1], command),
746
kwargs=popen_args)
747
self.checker.start()
748
self.checker_callback_tag = gobject.io_add_watch(
749
pipe[0].fileno(), gobject.IO_IN,
750
self.checker_callback, (pipe[0], command))
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
751
550
# Re-run this periodically if run by gobject.timeout_add
752
551
return True
753
552
759
558
if getattr(self, "checker", None) is None:
760
559
return
761
560
logger.debug("Stopping checker for %(name)s", vars(self))
762
self.checker.terminate()
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
763
569
self.checker = None
764
570
765
571
766
def dbus_service_property(dbus_interface,
767
signature="v",
768
access="readwrite",
769
byte_arrays=False):
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
770
574
"""Decorators for marking methods of a DBusObjectWithProperties to
771
575
become properties on the D-Bus.
772
576
781
585
# "Set" method, so we fail early here:
782
586
if byte_arrays and signature != "ay":
783
587
raise ValueError("Byte arrays not supported for non-'ay'"
784
" signature {!r}".format(signature))
785
588
" signature %r" % signature)
786
589
def decorator(func):
787
590
func._dbus_is_property = True
788
591
func._dbus_interface = dbus_interface
793
596
func._dbus_name = func._dbus_name[:-14]
794
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
795
598
return func
796
797
return decorator
798
799
800
def dbus_interface_annotations(dbus_interface):
801
"""Decorator for marking functions returning interface annotations
802
803
Usage:
804
805
@dbus_interface_annotations("org.example.Interface")
806
def _foo(self): # Function name does not matter
807
return {"org.freedesktop.DBus.Deprecated": "true",
808
"org.freedesktop.DBus.Property.EmitsChangedSignal":
809
"false"}
810
"""
811
812
def decorator(func):
813
func._dbus_is_interface = True
814
func._dbus_interface = dbus_interface
815
func._dbus_name = dbus_interface
816
return func
817
818
return decorator
819
820
821
def dbus_annotations(annotations):
822
"""Decorator to annotate D-Bus methods, signals or properties
823
Usage:
824
825
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
826
"org.freedesktop.DBus.Property."
827
"EmitsChangedSignal": "false"})
828
@dbus_service_property("org.example.Interface", signature="b",
829
access="r")
830
def Property_dbus_property(self):
831
return dbus.Boolean(False)
832
"""
833
834
def decorator(func):
835
func._dbus_annotations = annotations
836
return func
837
838
599
return decorator
839
600
840
601
841
602
class DBusPropertyException(dbus.exceptions.DBusException):
842
603
"""A base class for D-Bus property-related exceptions
843
604
"""
844
pass
605
def __unicode__(self):
606
return unicode(str(self))
845
607
846
608
847
609
class DBusPropertyAccessException(DBusPropertyException):
865
627
"""
866
628
867
629
@staticmethod
868
def _is_dbus_thing(thing):
869
"""Returns a function testing if an attribute is a D-Bus thing
870
871
If called like _is_dbus_thing("method") it returns a function
872
suitable for use as predicate to inspect.getmembers().
873
"""
874
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
875
False)
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
876
632
877
def _get_all_dbus_things(self, thing):
633
def _get_all_dbus_properties(self):
878
634
"""Returns a generator of (name, attribute) pairs
879
635
"""
880
return ((getattr(athing.__get__(self), "_dbus_name", name),
881
athing.__get__(self))
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
882
637
for cls in self.__class__.__mro__
883
for name, athing in
884
inspect.getmembers(cls, self._is_dbus_thing(thing)))
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
885
640
886
641
def _get_dbus_property(self, interface_name, property_name):
887
642
"""Returns a bound method if one exists which is a D-Bus
888
643
property with the specified name and interface.
889
644
"""
890
for cls in self.__class__.__mro__:
891
for name, value in inspect.getmembers(
892
cls, self._is_dbus_thing("property")):
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
893
648
if (value._dbus_name == property_name
894
649
and value._dbus_interface == interface_name):
895
650
return value.__get__(self)
896
651
897
652
# No such property
898
raise DBusPropertyNotFound("{}:{}.{}".format(
899
self.dbus_object_path, interface_name, property_name))
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
900
656
901
@dbus.service.method(dbus.PROPERTIES_IFACE,
902
in_signature="ss",
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
903
658
out_signature="v")
904
659
def Get(self, interface_name, property_name):
905
660
"""Standard D-Bus property Get() method, see D-Bus standard.
923
678
# The byte_arrays option is not supported yet on
924
679
# signatures other than "ay".
925
680
if prop._dbus_signature != "ay":
926
raise ValueError("Byte arrays not supported for non-"
927
"'ay' signature {!r}"
928
.format(prop._dbus_signature))
929
value = dbus.ByteArray(b''.join(chr(byte)
930
for byte in value))
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
931
684
prop(value)
932
685
933
@dbus.service.method(dbus.PROPERTIES_IFACE,
934
in_signature="s",
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
935
687
out_signature="a{sv}")
936
688
def GetAll(self, interface_name):
937
689
"""Standard D-Bus property GetAll() method, see D-Bus
939
691
940
692
Note: Will not include properties with access="write".
941
693
"""
942
properties = {}
943
for name, prop in self._get_all_dbus_things("property"):
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
944
696
if (interface_name
945
697
and interface_name != prop._dbus_interface):
946
698
# Interface non-empty but did not match
950
702
continue
951
703
value = prop()
952
704
if not hasattr(value, "variant_level"):
953
properties[name] = value
705
all[name] = value
954
706
continue
955
properties[name] = type(value)(
956
value, variant_level = value.variant_level + 1)
957
return dbus.Dictionary(properties, signature="sv")
958
959
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
960
def PropertiesChanged(self, interface_name, changed_properties,
961
invalidated_properties):
962
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
963
standard.
964
"""
965
pass
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
966
710
967
711
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
968
712
out_signature="s",
969
713
path_keyword='object_path',
970
714
connection_keyword='connection')
971
715
def Introspect(self, object_path, connection):
972
"""Overloading of standard D-Bus method.
973
974
Inserts property tags and interface annotation tags.
716
"""Standard D-Bus method, overloaded to insert property tags.
975
717
"""
976
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
977
719
connection)
978
720
try:
979
721
document = xml.dom.minidom.parseString(xmlstring)
980
981
722
def make_tag(document, name, prop):
982
723
e = document.createElement("property")
983
724
e.setAttribute("name", name)
984
725
e.setAttribute("type", prop._dbus_signature)
985
726
e.setAttribute("access", prop._dbus_access)
986
727
return e
987
988
728
for if_tag in document.getElementsByTagName("interface"):
989
# Add property tags
990
729
for tag in (make_tag(document, name, prop)
991
730
for name, prop
992
in self._get_all_dbus_things("property")
731
in self._get_all_dbus_properties()
993
732
if prop._dbus_interface
994
733
== if_tag.getAttribute("name")):
995
734
if_tag.appendChild(tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
999
annots = dict()
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr(
1006
prop, "_dbus_annotations", {}))
1007
for name, value in annots.items():
1008
ann_tag = document.createElement(
1009
"annotation")
1010
ann_tag.setAttribute("name", name)
1011
ann_tag.setAttribute("value", value)
1012
tag.appendChild(ann_tag)
1013
# Add interface annotation tags
1014
for annotation, value in dict(
1015
itertools.chain.from_iterable(
1016
annotations().items()
1017
for name, annotations
1018
in self._get_all_dbus_things("interface")
1019
if name == if_tag.getAttribute("name")
1020
)).items():
1021
ann_tag = document.createElement("annotation")
1022
ann_tag.setAttribute("name", annotation)
1023
ann_tag.setAttribute("value", value)
1024
if_tag.appendChild(ann_tag)
1025
735
# Add the names to the return values for the
1026
736
# "org.freedesktop.DBus.Properties" methods
1027
737
if (if_tag.getAttribute("name")
1042
752
except (AttributeError, xml.dom.DOMException,
1043
753
xml.parsers.expat.ExpatError) as error:
1044
754
logger.error("Failed to override Introspection method",
1045
exc_info=error)
755
error)
1046
756
return xmlstring
1047
757
1048
758
1049
def datetime_to_dbus(dt, variant_level=0):
759
def datetime_to_dbus (dt, variant_level=0):
1050
760
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1051
761
if dt is None:
1052
762
return dbus.String("", variant_level = variant_level)
1053
return dbus.String(dt.isoformat(), variant_level=variant_level)
1054
1055
1056
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
"""A class decorator; applied to a subclass of
1058
dbus.service.Object, it will add alternate D-Bus attributes with
1059
interface names according to the "alt_interface_names" mapping.
1060
Usage:
1061
1062
@alternate_dbus_interfaces({"org.example.Interface":
1063
"net.example.AlternateInterface"})
1064
class SampleDBusObject(dbus.service.Object):
1065
@dbus.service.method("org.example.Interface")
1066
def SampleDBusMethod():
1067
pass
1068
1069
The above "SampleDBusMethod" on "SampleDBusObject" will be
1070
reachable via two interfaces: "org.example.Interface" and
1071
"net.example.AlternateInterface", the latter of which will have
1072
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1073
"true", unless "deprecate" is passed with a False value.
1074
1075
This works for methods and signals, and also for D-Bus properties
1076
(from DBusObjectWithProperties) and interfaces (from the
1077
dbus_interface_annotations decorator).
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1078
770
"""
1079
1080
def wrapper(cls):
1081
for orig_interface_name, alt_interface_name in (
1082
alt_interface_names.items()):
1083
attr = {}
1084
interface_names = set()
1085
# Go though all attributes of the class
1086
for attrname, attribute in inspect.getmembers(cls):
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1087
778
# Ignore non-D-Bus attributes, and D-Bus attributes
1088
779
# with the wrong interface name
1089
780
if (not hasattr(attribute, "_dbus_interface")
1090
or not attribute._dbus_interface.startswith(
1091
orig_interface_name)):
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1092
783
continue
1093
784
# Create an alternate D-Bus interface name based on
1094
785
# the current name
1095
alt_interface = attribute._dbus_interface.replace(
1096
orig_interface_name, alt_interface_name)
1097
interface_names.add(alt_interface)
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1098
789
# Is this a D-Bus signal?
1099
790
if getattr(attribute, "_dbus_is_signal", False):
1100
# Extract the original non-method undecorated
1101
# function by black magic
791
# Extract the original non-method function by
792
# black magic
1102
793
nonmethod_func = (dict(
1103
zip(attribute.func_code.co_freevars,
1104
attribute.__closure__))
1105
["func"].cell_contents)
794
zip(attribute.func_code.co_freevars,
795
attribute.__closure__))["func"]
796
.cell_contents)
1106
797
# Create a new, but exactly alike, function
1107
798
# object, and decorate it to be a new D-Bus signal
1108
799
# with the alternate D-Bus interface name
1109
new_function = (dbus.service.signal(
1110
alt_interface, attribute._dbus_signature)
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
1111
803
(types.FunctionType(
1112
nonmethod_func.func_code,
1113
nonmethod_func.func_globals,
1114
nonmethod_func.func_name,
1115
nonmethod_func.func_defaults,
1116
nonmethod_func.func_closure)))
1117
# Copy annotations, if any
1118
try:
1119
new_function._dbus_annotations = dict(
1120
attribute._dbus_annotations)
1121
except AttributeError:
1122
pass
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
1123
809
# Define a creator of a function to call both the
1124
# original and alternate functions, so both the
1125
# original and alternate signals gets sent when
1126
# the function is called
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1127
812
def fixscope(func1, func2):
1128
813
"""This function is a scope container to pass
1129
814
func1 and func2 to the "call_both" function
1130
815
outside of its arguments"""
1131
1132
816
def call_both(*args, **kwargs):
1133
817
"""This function will emit two D-Bus
1134
818
signals by calling func1 and func2"""
1135
819
func1(*args, **kwargs)
1136
820
func2(*args, **kwargs)
1137
1138
821
return call_both
1139
822
# Create the "call_both" function and add it to
1140
823
# the class
1141
attr[attrname] = fixscope(attribute, new_function)
824
attr[attrname] = fixscope(attribute,
825
new_function)
1142
826
# Is this a D-Bus method?
1143
827
elif getattr(attribute, "_dbus_is_method", False):
1144
828
# Create a new, but exactly alike, function
1145
829
# object. Decorate it to be a new D-Bus method
1146
830
# with the alternate D-Bus interface name. Add it
1147
831
# to the class.
1148
attr[attrname] = (
1149
dbus.service.method(
1150
alt_interface,
1151
attribute._dbus_in_signature,
1152
attribute._dbus_out_signature)
1153
(types.FunctionType(attribute.func_code,
1154
attribute.func_globals,
1155
attribute.func_name,
1156
attribute.func_defaults,
1157
attribute.func_closure)))
1158
# Copy annotations, if any
1159
try:
1160
attr[attrname]._dbus_annotations = dict(
1161
attribute._dbus_annotations)
1162
except AttributeError:
1163
pass
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
1164
842
# Is this a D-Bus property?
1165
843
elif getattr(attribute, "_dbus_is_property", False):
1166
844
# Create a new, but exactly alike, function
1167
845
# object, and decorate it to be a new D-Bus
1168
846
# property with the alternate D-Bus interface
1169
847
# name. Add it to the class.
1170
attr[attrname] = (dbus_service_property(
1171
alt_interface, attribute._dbus_signature,
1172
attribute._dbus_access,
1173
attribute._dbus_get_args_options
1174
["byte_arrays"])
1175
(types.FunctionType(
1176
attribute.func_code,
1177
attribute.func_globals,
1178
attribute.func_name,
1179
attribute.func_defaults,
1180
attribute.func_closure)))
1181
# Copy annotations, if any
1182
try:
1183
attr[attrname]._dbus_annotations = dict(
1184
attribute._dbus_annotations)
1185
except AttributeError:
1186
pass
1187
# Is this a D-Bus interface?
1188
elif getattr(attribute, "_dbus_is_interface", False):
1189
# Create a new, but exactly alike, function
1190
# object. Decorate it to be a new D-Bus interface
1191
# with the alternate D-Bus interface name. Add it
1192
# to the class.
1193
attr[attrname] = (
1194
dbus_interface_annotations(alt_interface)
1195
(types.FunctionType(attribute.func_code,
1196
attribute.func_globals,
1197
attribute.func_name,
1198
attribute.func_defaults,
1199
attribute.func_closure)))
1200
if deprecate:
1201
# Deprecate all alternate interfaces
1202
iname="_AlternateDBusNames_interface_annotation{}"
1203
for interface_name in interface_names:
1204
1205
@dbus_interface_annotations(interface_name)
1206
def func(self):
1207
return { "org.freedesktop.DBus.Deprecated":
1208
"true" }
1209
# Find an unused name
1210
for aname in (iname.format(i)
1211
for i in itertools.count()):
1212
if aname not in attr:
1213
attr[aname] = func
1214
break
1215
if interface_names:
1216
# Replace the class with a new subclass of it with
1217
# methods, signals, etc. as created above.
1218
cls = type(b"{}Alternate".format(cls.__name__),
1219
(cls, ), attr)
1220
return cls
1221
1222
return wrapper
1223
1224
1225
@alternate_dbus_interfaces({"se.recompile.Mandos":
1226
"se.bsnet.fukt.Mandos"})
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1227
863
class ClientDBus(Client, DBusObjectWithProperties):
1228
864
"""A Client class using D-Bus
1229
865
1233
869
"""
1234
870
1235
871
runtime_expansions = (Client.runtime_expansions
1236
+ ("dbus_object_path", ))
1237
1238
_interface = "se.recompile.Mandos.Client"
872
+ ("dbus_object_path",))
1239
873
1240
874
# dbus.service.Object doesn't use super(), so we can't either.
1241
875
1242
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1243
878
self.bus = bus
1244
879
Client.__init__(self, *args, **kwargs)
1245
880
# Only now, when this client is initialized, can it show up on
1246
881
# the D-Bus
1247
client_object_name = str(self.name).translate(
882
client_object_name = unicode(self.name).translate(
1248
883
{ord("."): ord("_"),
1249
884
ord("-"): ord("_")})
1250
self.dbus_object_path = dbus.ObjectPath(
1251
"/clients/" + client_object_name)
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1252
887
DBusObjectWithProperties.__init__(self, self.bus,
1253
888
self.dbus_object_path)
1254
1255
def notifychangeproperty(transform_func, dbus_name,
1256
type_func=lambda x: x,
1257
variant_level=1,
1258
invalidate_only=False,
1259
_interface=_interface):
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
1260
893
""" Modify a variable so that it's a property which announces
1261
894
its changes to DBus.
1262
895
1263
896
transform_fun: Function that takes a value and a variant_level
1264
897
and transforms it to a D-Bus type.
1265
898
dbus_name: D-Bus name of the variable
1267
900
to the D-Bus. Default: no transform
1268
901
variant_level: D-Bus variant level. Default: 1
1269
902
"""
1270
attrname = "_{}".format(dbus_name)
1271
903
attrname = "_{0}".format(dbus_name)
1272
904
def setter(self, value):
1273
905
if hasattr(self, "dbus_object_path"):
1274
906
if (not hasattr(self, attrname) or
1275
907
type_func(getattr(self, attrname, None))
1276
908
!= type_func(value)):
1277
if invalidate_only:
1278
self.PropertiesChanged(
1279
_interface, dbus.Dictionary(),
1280
dbus.Array((dbus_name, )))
1281
else:
1282
dbus_value = transform_func(
1283
type_func(value),
1284
variant_level = variant_level)
1285
self.PropertyChanged(dbus.String(dbus_name),
1286
dbus_value)
1287
self.PropertiesChanged(
1288
_interface,
1289
dbus.Dictionary({ dbus.String(dbus_name):
1290
dbus_value }),
1291
dbus.Array())
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_value)
1292
914
setattr(self, attrname, value)
1293
915
1294
916
return property(lambda self: getattr(self, attrname), setter)
1295
917
918
1296
919
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1297
920
approvals_pending = notifychangeproperty(dbus.Boolean,
1298
921
"ApprovalPending",
1300
923
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1301
924
last_enabled = notifychangeproperty(datetime_to_dbus,
1302
925
"LastEnabled")
1303
checker = notifychangeproperty(
1304
dbus.Boolean, "CheckerRunning",
1305
type_func = lambda checker: checker is not None)
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1306
929
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1307
930
"LastCheckedOK")
1308
last_checker_status = notifychangeproperty(dbus.Int16,
1309
"LastCheckerStatus")
1310
931
last_approval_request = notifychangeproperty(
1311
932
datetime_to_dbus, "LastApprovalRequest")
1312
933
approved_by_default = notifychangeproperty(dbus.Boolean,
1313
934
"ApprovedByDefault")
1314
approval_delay = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDelay",
1316
type_func = lambda td: td.total_seconds() * 1000)
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1317
939
approval_duration = notifychangeproperty(
1318
dbus.UInt64, "ApprovalDuration",
1319
type_func = lambda td: td.total_seconds() * 1000)
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1320
942
host = notifychangeproperty(dbus.String, "Host")
1321
timeout = notifychangeproperty(
1322
dbus.UInt64, "Timeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1324
946
extended_timeout = notifychangeproperty(
1325
dbus.UInt64, "ExtendedTimeout",
1326
type_func = lambda td: td.total_seconds() * 1000)
1327
interval = notifychangeproperty(
1328
dbus.UInt64, "Interval",
1329
type_func = lambda td: td.total_seconds() * 1000)
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
1330
953
checker_command = notifychangeproperty(dbus.String, "Checker")
1331
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1332
invalidate_only=True)
1333
954
1334
955
del notifychangeproperty
1335
956
1342
963
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1343
964
Client.__del__(self, *args, **kwargs)
1344
965
1345
def checker_callback(self, source, condition,
1346
(connection, command), *args, **kwargs):
1347
ret = Client.checker_callback(self, source, condition,
1348
(connection, command), *args,
1349
**kwargs)
1350
exitstatus = self.last_checker_status
1351
if exitstatus >= 0:
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
1352
972
# Emit D-Bus signal
1353
973
self.CheckerCompleted(dbus.Int16(exitstatus),
1354
dbus.Int64(0),
974
dbus.Int64(condition),
1355
975
dbus.String(command))
1356
976
else:
1357
977
# Emit D-Bus signal
1358
978
self.CheckerCompleted(dbus.Int16(-1),
1359
dbus.Int64(
1360
self.last_checker_signal),
979
dbus.Int64(condition),
1361
980
dbus.String(command))
1362
return ret
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
1363
984
1364
985
def start_checker(self, *args, **kwargs):
1365
old_checker_pid = getattr(self.checker, "pid", None)
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1366
991
r = Client.start_checker(self, *args, **kwargs)
1367
992
# Only if new checker process was started
1368
993
if (self.checker is not None
1372
997
return r
1373
998
1374
999
def _reset_approved(self):
1375
self.approved = None
1000
self._approved = None
1376
1001
return False
1377
1002
1378
1003
def approve(self, value=True):
1379
self.approved = value
1380
gobject.timeout_add(int(self.approval_duration.total_seconds()
1381
* 1000), self._reset_approved)
1382
1004
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1383
1010
1384
1011
## D-Bus methods, signals & properties
1385
1386
## Interfaces
1012
_interface = "se.recompile.Mandos.Client"
1387
1013
1388
1014
## Signals
1389
1015
1400
1026
pass
1401
1027
1402
1028
# PropertyChanged - signal
1403
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1404
1029
@dbus.service.signal(_interface, signature="sv")
1405
1030
def PropertyChanged(self, property, value):
1406
1031
"D-Bus signal"
1470
1095
return dbus.Boolean(bool(self.approvals_pending))
1471
1096
1472
1097
# ApprovedByDefault - property
1473
@dbus_service_property(_interface,
1474
signature="b",
1098
@dbus_service_property(_interface, signature="b",
1475
1099
access="readwrite")
1476
1100
def ApprovedByDefault_dbus_property(self, value=None):
1477
1101
if value is None: # get
1479
1103
self.approved_by_default = bool(value)
1480
1104
1481
1105
# ApprovalDelay - property
1482
@dbus_service_property(_interface,
1483
signature="t",
1106
@dbus_service_property(_interface, signature="t",
1484
1107
access="readwrite")
1485
1108
def ApprovalDelay_dbus_property(self, value=None):
1486
1109
if value is None: # get
1487
return dbus.UInt64(self.approval_delay.total_seconds()
1488
* 1000)
1110
return dbus.UInt64(self.approval_delay_milliseconds())
1489
1111
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1490
1112
1491
1113
# ApprovalDuration - property
1492
@dbus_service_property(_interface,
1493
signature="t",
1114
@dbus_service_property(_interface, signature="t",
1494
1115
access="readwrite")
1495
1116
def ApprovalDuration_dbus_property(self, value=None):
1496
1117
if value is None: # get
1497
return dbus.UInt64(self.approval_duration.total_seconds()
1498
* 1000)
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
1499
1120
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1500
1121
1501
1122
# Name - property
1509
1130
return dbus.String(self.fingerprint)
1510
1131
1511
1132
# Host - property
1512
@dbus_service_property(_interface,
1513
signature="s",
1133
@dbus_service_property(_interface, signature="s",
1514
1134
access="readwrite")
1515
1135
def Host_dbus_property(self, value=None):
1516
1136
if value is None: # get
1517
1137
return dbus.String(self.host)
1518
self.host = str(value)
1138
self.host = value
1519
1139
1520
1140
# Created - property
1521
1141
@dbus_service_property(_interface, signature="s", access="read")
1522
1142
def Created_dbus_property(self):
1523
return datetime_to_dbus(self.created)
1143
return dbus.String(datetime_to_dbus(self.created))
1524
1144
1525
1145
# LastEnabled - property
1526
1146
@dbus_service_property(_interface, signature="s", access="read")
1528
1148
return datetime_to_dbus(self.last_enabled)
1529
1149
1530
1150
# Enabled - property
1531
@dbus_service_property(_interface,
1532
signature="b",
1151
@dbus_service_property(_interface, signature="b",
1533
1152
access="readwrite")
1534
1153
def Enabled_dbus_property(self, value=None):
1535
1154
if value is None: # get
1540
1159
self.disable()
1541
1160
1542
1161
# LastCheckedOK - property
1543
@dbus_service_property(_interface,
1544
signature="s",
1162
@dbus_service_property(_interface, signature="s",
1545
1163
access="readwrite")
1546
1164
def LastCheckedOK_dbus_property(self, value=None):
1547
1165
if value is not None:
1549
1167
return
1550
1168
return datetime_to_dbus(self.last_checked_ok)
1551
1169
1552
# LastCheckerStatus - property
1553
@dbus_service_property(_interface, signature="n", access="read")
1554
def LastCheckerStatus_dbus_property(self):
1555
return dbus.Int16(self.last_checker_status)
1556
1557
1170
# Expires - property
1558
1171
@dbus_service_property(_interface, signature="s", access="read")
1559
1172
def Expires_dbus_property(self):
1565
1178
return datetime_to_dbus(self.last_approval_request)
1566
1179
1567
1180
# Timeout - property
1568
@dbus_service_property(_interface,
1569
signature="t",
1181
@dbus_service_property(_interface, signature="t",
1570
1182
access="readwrite")
1571
1183
def Timeout_dbus_property(self, value=None):
1572
1184
if value is None: # get
1573
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1574
old_timeout = self.timeout
1185
return dbus.UInt64(self.timeout_milliseconds())
1575
1186
self.timeout = datetime.timedelta(0, 0, 0, value)
1576
# Reschedule disabling
1577
if self.enabled:
1578
now = datetime.datetime.utcnow()
1579
self.expires += self.timeout - old_timeout
1580
if self.expires <= now:
1581
# The timeout has passed
1582
self.disable()
1583
else:
1584
if (getattr(self, "disable_initiator_tag", None)
1585
is None):
1586
return
1587
gobject.source_remove(self.disable_initiator_tag)
1588
self.disable_initiator_tag = gobject.timeout_add(
1589
int((self.expires - now).total_seconds() * 1000),
1590
self.disable)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1591
1207
1592
1208
# ExtendedTimeout - property
1593
@dbus_service_property(_interface,
1594
signature="t",
1209
@dbus_service_property(_interface, signature="t",
1595
1210
access="readwrite")
1596
1211
def ExtendedTimeout_dbus_property(self, value=None):
1597
1212
if value is None: # get
1598
return dbus.UInt64(self.extended_timeout.total_seconds()
1599
* 1000)
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
1600
1214
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1601
1215
1602
1216
# Interval - property
1603
@dbus_service_property(_interface,
1604
signature="t",
1217
@dbus_service_property(_interface, signature="t",
1605
1218
access="readwrite")
1606
1219
def Interval_dbus_property(self, value=None):
1607
1220
if value is None: # get
1608
return dbus.UInt64(self.interval.total_seconds() * 1000)
1221
return dbus.UInt64(self.interval_milliseconds())
1609
1222
self.interval = datetime.timedelta(0, 0, 0, value)
1610
1223
if getattr(self, "checker_initiator_tag", None) is None:
1611
1224
return
1612
if self.enabled:
1613
# Reschedule checker run
1614
gobject.source_remove(self.checker_initiator_tag)
1615
self.checker_initiator_tag = gobject.timeout_add(
1616
value, self.start_checker)
1617
self.start_checker() # Start one now, too
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1618
1230
1619
1231
# Checker - property
1620
@dbus_service_property(_interface,
1621
signature="s",
1232
@dbus_service_property(_interface, signature="s",
1622
1233
access="readwrite")
1623
1234
def Checker_dbus_property(self, value=None):
1624
1235
if value is None: # get
1625
1236
return dbus.String(self.checker_command)
1626
self.checker_command = str(value)
1237
self.checker_command = value
1627
1238
1628
1239
# CheckerRunning - property
1629
@dbus_service_property(_interface,
1630
signature="b",
1240
@dbus_service_property(_interface, signature="b",
1631
1241
access="readwrite")
1632
1242
def CheckerRunning_dbus_property(self, value=None):
1633
1243
if value is None: # get
1643
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1644
1254
1645
1255
# Secret = property
1646
@dbus_service_property(_interface,
1647
signature="ay",
1648
access="write",
1649
byte_arrays=True)
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
1650
1258
def Secret_dbus_property(self, value):
1651
self.secret = bytes(value)
1259
self.secret = str(value)
1652
1260
1653
1261
del _interface
1654
1262
1661
1269
raise KeyError()
1662
1270
1663
1271
def __getattribute__(self, name):
1664
if name == '_pipe':
1272
if(name == '_pipe'):
1665
1273
return super(ProxyClient, self).__getattribute__(name)
1666
1274
self._pipe.send(('getattr', name))
1667
1275
data = self._pipe.recv()
1668
1276
if data[0] == 'data':
1669
1277
return data[1]
1670
1278
if data[0] == 'function':
1671
1672
1279
def func(*args, **kwargs):
1673
1280
self._pipe.send(('funcall', name, args, kwargs))
1674
1281
return self._pipe.recv()[1]
1675
1676
1282
return func
1677
1283
1678
1284
def __setattr__(self, name, value):
1679
if name == '_pipe':
1285
if(name == '_pipe'):
1680
1286
return super(ProxyClient, self).__setattr__(name, value)
1681
1287
self._pipe.send(('setattr', name, value))
1682
1288
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1683
1291
1684
1292
class ClientHandler(socketserver.BaseRequestHandler, object):
1685
1293
"""A class to handle client connections.
1690
1298
def handle(self):
1691
1299
with contextlib.closing(self.server.child_pipe) as child_pipe:
1692
1300
logger.info("TCP connection from: %s",
1693
str(self.client_address))
1301
unicode(self.client_address))
1694
1302
logger.debug("Pipe FD: %d",
1695
1303
self.server.child_pipe.fileno())
1696
1304
1697
session = gnutls.connection.ClientSession(
1698
self.request, gnutls.connection .X509Credentials())
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1699
1309
1700
1310
# Note: gnutls.connection.X509Credentials is really a
1701
1311
# generic GnuTLS certificate credentials object so long as
1710
1320
priority = self.server.gnutls_priority
1711
1321
if priority is None:
1712
1322
priority = "NORMAL"
1713
gnutls.library.functions.gnutls_priority_set_direct(
1714
session._c_object, priority, None)
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1715
1326
1716
1327
# Start communication using the Mandos protocol
1717
1328
# Get protocol number
1719
1330
logger.debug("Protocol version: %r", line)
1720
1331
try:
1721
1332
if int(line.strip().split()[0]) > 1:
1722
raise RuntimeError(line)
1333
raise RuntimeError
1723
1334
except (ValueError, IndexError, RuntimeError) as error:
1724
1335
logger.error("Unknown protocol version: %s", error)
1725
1336
return
1737
1348
approval_required = False
1738
1349
try:
1739
1350
try:
1740
fpr = self.fingerprint(
1741
self.peer_certificate(session))
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1742
1353
except (TypeError,
1743
1354
gnutls.errors.GNUTLSError) as error:
1744
1355
logger.warning("Bad certificate: %s", error)
1759
1370
while True:
1760
1371
if not client.enabled:
1761
1372
logger.info("Client %s is disabled",
1762
client.name)
1373
client.name)
1763
1374
if self.server.use_dbus:
1764
1375
# Emit D-Bus signal
1765
1376
client.Rejected("Disabled")
1766
1377
return
1767
1378
1768
if client.approved or not client.approval_delay:
1379
if client._approved or not client.approval_delay:
1769
1380
#We are approved or approval is disabled
1770
1381
break
1771
elif client.approved is None:
1382
elif client._approved is None:
1772
1383
logger.info("Client %s needs approval",
1773
1384
client.name)
1774
1385
if self.server.use_dbus:
1775
1386
# Emit D-Bus signal
1776
1387
client.NeedApproval(
1777
client.approval_delay.total_seconds()
1778
* 1000, client.approved_by_default)
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
1779
1390
else:
1780
1391
logger.warning("Client %s was not approved",
1781
1392
client.name)
1787
1398
#wait until timeout or approved
1788
1399
time = datetime.datetime.now()
1789
1400
client.changedstate.acquire()
1790
client.changedstate.wait(delay.total_seconds())
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
1791
1404
client.changedstate.release()
1792
1405
time2 = datetime.datetime.now()
1793
1406
if (time2 - time) >= delay:
1809
1422
try:
1810
1423
sent = session.send(client.secret[sent_size:])
1811
1424
except gnutls.errors.GNUTLSError as error:
1812
logger.warning("gnutls send failed",
1813
exc_info=error)
1425
logger.warning("gnutls send failed")
1814
1426
return
1815
logger.debug("Sent: %d, remaining: %d", sent,
1816
len(client.secret) - (sent_size
1817
+ sent))
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1818
1430
sent_size += sent
1819
1431
1820
1432
logger.info("Sending secret to %s", client.name)
1821
1433
# bump the timeout using extended_timeout
1822
client.bump_timeout(client.extended_timeout)
1434
client.checked_ok(client.extended_timeout)
1823
1435
if self.server.use_dbus:
1824
1436
# Emit D-Bus signal
1825
1437
client.GotSecret()
1830
1442
try:
1831
1443
session.bye()
1832
1444
except gnutls.errors.GNUTLSError as error:
1833
logger.warning("GnuTLS bye failed",
1834
exc_info=error)
1445
logger.warning("GnuTLS bye failed")
1835
1446
1836
1447
@staticmethod
1837
1448
def peer_certificate(session):
1838
1449
"Return the peer's OpenPGP certificate as a bytestring"
1839
1450
# If not an OpenPGP certificate...
1840
if (gnutls.library.functions.gnutls_certificate_type_get(
1841
session._c_object)
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1842
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1843
1454
# ...do the normal thing
1844
1455
return session.peer_certificate
1858
1469
def fingerprint(openpgp):
1859
1470
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1860
1471
# New GnuTLS "datum" with the OpenPGP public key
1861
datum = gnutls.library.types.gnutls_datum_t(
1862
ctypes.cast(ctypes.c_char_p(openpgp),
1863
ctypes.POINTER(ctypes.c_ubyte)),
1864
ctypes.c_uint(len(openpgp)))
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
1865
1477
# New empty GnuTLS certificate
1866
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1867
gnutls.library.functions.gnutls_openpgp_crt_init(
1868
ctypes.byref(crt))
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1869
1481
# Import the OpenPGP public key into the certificate
1870
gnutls.library.functions.gnutls_openpgp_crt_import(
1871
crt, ctypes.byref(datum),
1872
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
1873
1486
# Verify the self signature in the key
1874
1487
crtverify = ctypes.c_uint()
1875
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1876
crt, 0, ctypes.byref(crtverify))
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
1877
1491
if crtverify.value != 0:
1878
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
raise gnutls.errors.CertificateSecurityError(
1880
"Verify failed")
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
1881
1495
# New buffer for the fingerprint
1882
1496
buf = ctypes.create_string_buffer(20)
1883
1497
buf_len = ctypes.c_size_t()
1884
1498
# Get the fingerprint from the certificate into the buffer
1885
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1886
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
1887
1502
# Deinit the certificate
1888
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1889
1504
# Convert the buffer to a Python bytestring
1890
1505
fpr = ctypes.string_at(buf, buf_len.value)
1891
1506
# Convert the bytestring to hexadecimal notation
1892
hex_fpr = binascii.hexlify(fpr).upper()
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1893
1508
return hex_fpr
1894
1509
1895
1510
1896
1511
class MultiprocessingMixIn(object):
1897
1512
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1898
1899
1513
def sub_process_main(self, request, address):
1900
1514
try:
1901
1515
self.finish_request(request, address)
1902
except Exception:
1516
except:
1903
1517
self.handle_error(request, address)
1904
1518
self.close_request(request)
1905
1519
1906
1520
def process_request(self, request, address):
1907
1521
"""Start a new process to process the request."""
1908
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1909
args = (request, address))
1523
args = (request,
1524
address))
1910
1525
proc.start()
1911
1526
return proc
1912
1527
1913
1528
1914
1529
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1915
1530
""" adds a pipe to the MixIn """
1916
1917
1531
def process_request(self, request, client_address):
1918
1532
"""Overrides and wraps the original process_request().
1919
1533
1928
1542
1929
1543
def add_pipe(self, parent_pipe, proc):
1930
1544
"""Dummy function; override as necessary"""
1931
raise NotImplementedError()
1545
raise NotImplementedError
1932
1546
1933
1547
1934
1548
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1940
1554
interface: None or a network interface name (string)
1941
1555
use_ipv6: Boolean; to use IPv6 or not
1942
1556
"""
1943
1944
1557
def __init__(self, server_address, RequestHandlerClass,
1945
interface=None,
1946
use_ipv6=True,
1947
socketfd=None):
1948
"""If socketfd is set, use that file descriptor instead of
1949
creating a new one with socket.socket().
1950
"""
1558
interface=None, use_ipv6=True):
1951
1559
self.interface = interface
1952
1560
if use_ipv6:
1953
1561
self.address_family = socket.AF_INET6
1954
if socketfd is not None:
1955
# Save the file descriptor
1956
self.socketfd = socketfd
1957
# Save the original socket.socket() function
1958
self.socket_socket = socket.socket
1959
# To implement --socket, we monkey patch socket.socket.
1960
#
1961
# (When socketserver.TCPServer is a new-style class, we
1962
# could make self.socket into a property instead of monkey
1963
# patching socket.socket.)
1964
#
1965
# Create a one-time-only replacement for socket.socket()
1966
@functools.wraps(socket.socket)
1967
def socket_wrapper(*args, **kwargs):
1968
# Restore original function so subsequent calls are
1969
# not affected.
1970
socket.socket = self.socket_socket
1971
del self.socket_socket
1972
# This time only, return a new socket object from the
1973
# saved file descriptor.
1974
return socket.fromfd(self.socketfd, *args, **kwargs)
1975
# Replace socket.socket() function with wrapper
1976
socket.socket = socket_wrapper
1977
# The socketserver.TCPServer.__init__ will call
1978
# socket.socket(), which might be our replacement,
1979
# socket_wrapper(), if socketfd was set.
1980
1562
socketserver.TCPServer.__init__(self, server_address,
1981
1563
RequestHandlerClass)
1982
1983
1564
def server_bind(self):
1984
1565
"""This overrides the normal server_bind() function
1985
1566
to bind to an interface if one was specified, and also NOT to
1991
1572
self.interface)
1992
1573
else:
1993
1574
try:
1994
self.socket.setsockopt(
1995
socket.SOL_SOCKET, SO_BINDTODEVICE,
1996
(self.interface + "\0").encode("utf-8"))
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1997
1579
except socket.error as error:
1998
if error.errno == errno.EPERM:
1999
logger.error("No permission to bind to"
2000
" interface %s", self.interface)
2001
elif error.errno == errno.ENOPROTOOPT:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
2002
1585
logger.error("SO_BINDTODEVICE not available;"
2003
1586
" cannot bind to interface %s",
2004
1587
self.interface)
2005
elif error.errno == errno.ENODEV:
2006
logger.error("Interface %s does not exist,"
2007
" cannot bind", self.interface)
2008
1588
else:
2009
1589
raise
2010
1590
# Only bind(2) the socket if we really need to.
2013
1593
if self.address_family == socket.AF_INET6:
2014
1594
any_address = "::" # in6addr_any
2015
1595
else:
2016
any_address = "0.0.0.0" # INADDR_ANY
1596
any_address = socket.INADDR_ANY
2017
1597
self.server_address = (any_address,
2018
1598
self.server_address[1])
2019
1599
elif not self.server_address[1]:
2020
self.server_address = (self.server_address[0], 0)
1600
self.server_address = (self.server_address[0],
1601
0)
2021
1602
# if self.interface:
2022
1603
# self.server_address = (self.server_address[0],
2023
1604
# 0, # port
2037
1618
2038
1619
Assumes a gobject.MainLoop event loop.
2039
1620
"""
2040
2041
1621
def __init__(self, server_address, RequestHandlerClass,
2042
interface=None,
2043
use_ipv6=True,
2044
clients=None,
2045
gnutls_priority=None,
2046
use_dbus=True,
2047
socketfd=None):
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2048
1624
self.enabled = False
2049
1625
self.clients = clients
2050
1626
if self.clients is None:
2051
self.clients = {}
1627
self.clients = set()
2052
1628
self.use_dbus = use_dbus
2053
1629
self.gnutls_priority = gnutls_priority
2054
1630
IPv6_TCPServer.__init__(self, server_address,
2055
1631
RequestHandlerClass,
2056
1632
interface = interface,
2057
use_ipv6 = use_ipv6,
2058
socketfd = socketfd)
2059
1633
use_ipv6 = use_ipv6)
2060
1634
def server_activate(self):
2061
1635
if self.enabled:
2062
1636
return socketserver.TCPServer.server_activate(self)
2066
1640
2067
1641
def add_pipe(self, parent_pipe, proc):
2068
1642
# Call "handle_ipc" for both data and EOF events
2069
gobject.io_add_watch(
2070
parent_pipe.fileno(),
2071
gobject.IO_IN | gobject.IO_HUP,
2072
functools.partial(self.handle_ipc,
2073
parent_pipe = parent_pipe,
2074
proc = proc))
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
2075
1649
2076
def handle_ipc(self, source, condition,
2077
parent_pipe=None,
2078
proc = None,
2079
client_object=None):
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
2080
1666
# error, or the other end of multiprocessing.Pipe has closed
2081
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2082
1668
# Wait for other process to exit
2083
1669
proc.join()
2084
1670
return False
2091
1677
fpr = request[1]
2092
1678
address = request[2]
2093
1679
2094
for c in self.clients.itervalues():
1680
for c in self.clients:
2095
1681
if c.fingerprint == fpr:
2096
1682
client = c
2097
1683
break
2105
1691
parent_pipe.send(False)
2106
1692
return False
2107
1693
2108
gobject.io_add_watch(
2109
parent_pipe.fileno(),
2110
gobject.IO_IN | gobject.IO_HUP,
2111
functools.partial(self.handle_ipc,
2112
parent_pipe = parent_pipe,
2113
proc = proc,
2114
client_object = client))
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
client))
2115
1702
parent_pipe.send(True)
2116
1703
# remove the old hook in favor of the new above hook on
2117
1704
# same fileno
2123
1710
2124
1711
parent_pipe.send(('data', getattr(client_object,
2125
1712
funcname)(*args,
2126
**kwargs)))
1713
**kwargs)))
2127
1714
2128
1715
if command == 'getattr':
2129
1716
attrname = request[1]
2130
1717
if callable(client_object.__getattribute__(attrname)):
2131
parent_pipe.send(('function', ))
1718
parent_pipe.send(('function',))
2132
1719
else:
2133
parent_pipe.send((
2134
'data', client_object.__getattribute__(attrname)))
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
2135
1722
2136
1723
if command == 'setattr':
2137
1724
attrname = request[1]
2141
1728
return True
2142
1729
2143
1730
2144
def rfc3339_duration_to_delta(duration):
2145
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2146
2147
>>> rfc3339_duration_to_delta("P7D")
2148
datetime.timedelta(7)
2149
>>> rfc3339_duration_to_delta("PT60S")
2150
datetime.timedelta(0, 60)
2151
>>> rfc3339_duration_to_delta("PT60M")
2152
datetime.timedelta(0, 3600)
2153
>>> rfc3339_duration_to_delta("PT24H")
2154
datetime.timedelta(1)
2155
>>> rfc3339_duration_to_delta("P1W")
2156
datetime.timedelta(7)
2157
>>> rfc3339_duration_to_delta("PT5M30S")
2158
datetime.timedelta(0, 330)
2159
>>> rfc3339_duration_to_delta("P1DT3M20S")
2160
datetime.timedelta(1, 200)
2161
"""
2162
2163
# Parsing an RFC 3339 duration with regular expressions is not
2164
# possible - there would have to be multiple places for the same
2165
# values, like seconds. The current code, while more esoteric, is
2166
# cleaner without depending on a parsing library. If Python had a
2167
# built-in library for parsing we would use it, but we'd like to
2168
# avoid excessive use of external libraries.
2169
2170
# New type for defining tokens, syntax, and semantics all-in-one
2171
Token = collections.namedtuple("Token",
2172
("regexp", # To match token; if
2173
# "value" is not None,
2174
# must have a "group"
2175
# containing digits
2176
"value", # datetime.timedelta or
2177
# None
2178
"followers")) # Tokens valid after
2179
# this token
2180
Token = collections.namedtuple("Token", (
2181
"regexp", # To match token; if "value" is not None, must have
2182
# a "group" containing digits
2183
"value", # datetime.timedelta or None
2184
"followers")) # Tokens valid after this token
2185
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2186
# the "duration" ABNF definition in RFC 3339, Appendix A.
2187
token_end = Token(re.compile(r"$"), None, frozenset())
2188
token_second = Token(re.compile(r"(\d+)S"),
2189
datetime.timedelta(seconds=1),
2190
frozenset((token_end, )))
2191
token_minute = Token(re.compile(r"(\d+)M"),
2192
datetime.timedelta(minutes=1),
2193
frozenset((token_second, token_end)))
2194
token_hour = Token(re.compile(r"(\d+)H"),
2195
datetime.timedelta(hours=1),
2196
frozenset((token_minute, token_end)))
2197
token_time = Token(re.compile(r"T"),
2198
None,
2199
frozenset((token_hour, token_minute,
2200
token_second)))
2201
token_day = Token(re.compile(r"(\d+)D"),
2202
datetime.timedelta(days=1),
2203
frozenset((token_time, token_end)))
2204
token_month = Token(re.compile(r"(\d+)M"),
2205
datetime.timedelta(weeks=4),
2206
frozenset((token_day, token_end)))
2207
token_year = Token(re.compile(r"(\d+)Y"),
2208
datetime.timedelta(weeks=52),
2209
frozenset((token_month, token_end)))
2210
token_week = Token(re.compile(r"(\d+)W"),
2211
datetime.timedelta(weeks=1),
2212
frozenset((token_end, )))
2213
token_duration = Token(re.compile(r"P"), None,
2214
frozenset((token_year, token_month,
2215
token_day, token_time,
2216
token_week)))
2217
# Define starting values
2218
value = datetime.timedelta() # Value so far
2219
found_token = None
2220
followers = frozenset((token_duration,)) # Following valid tokens
2221
s = duration # String left to parse
2222
# Loop until end token is found
2223
while found_token is not token_end:
2224
# Search for any currently valid tokens
2225
for token in followers:
2226
match = token.regexp.match(s)
2227
if match is not None:
2228
# Token found
2229
if token.value is not None:
2230
# Value found, parse digits
2231
factor = int(match.group(1), 10)
2232
# Add to value so far
2233
value += factor * token.value
2234
# Strip token from string
2235
s = token.regexp.sub("", s, 1)
2236
# Go to found token
2237
found_token = token
2238
# Set valid next tokens
2239
followers = found_token.followers
2240
break
2241
else:
2242
# No currently valid tokens were found
2243
raise ValueError("Invalid RFC 3339 duration")
2244
# End token found
2245
return value
2246
2247
2248
1731
def string_to_delta(interval):
2249
1732
"""Parse a string and return a datetime.timedelta
2250
1733
2261
1744
>>> string_to_delta('5m 30s')
2262
1745
datetime.timedelta(0, 330)
2263
1746
"""
2264
2265
try:
2266
return rfc3339_duration_to_delta(interval)
2267
except ValueError:
2268
pass
2269
2270
1747
timevalue = datetime.timedelta(0)
2271
1748
for s in interval.split():
2272
1749
try:
2273
suffix = s[-1]
1750
suffix = unicode(s[-1])
2274
1751
value = int(s[:-1])
2275
1752
if suffix == "d":
2276
1753
delta = datetime.timedelta(value)
2283
1760
elif suffix == "w":
2284
1761
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2285
1762
else:
2286
raise ValueError("Unknown suffix {!r}".format(suffix))
2287
except IndexError as e:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2288
1765
raise ValueError(*(e.args))
2289
1766
timevalue += delta
2290
1767
return timevalue
2291
1768
2292
1769
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
2293
1794
def daemon(nochdir = False, noclose = False):
2294
1795
"""See daemon(3). Standard BSD Unix function.
2295
1796
2303
1804
sys.exit()
2304
1805
if not noclose:
2305
1806
# Close all standard open file descriptors
2306
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2307
1808
if not stat.S_ISCHR(os.fstat(null).st_mode):
2308
1809
raise OSError(errno.ENODEV,
2309
"{} not a character device"
2310
.format(os.devnull))
1810
"%s not a character device"
1811
% os.path.devnull)
2311
1812
os.dup2(null, sys.stdin.fileno())
2312
1813
os.dup2(null, sys.stdout.fileno())
2313
1814
os.dup2(null, sys.stderr.fileno())
2322
1823
2323
1824
parser = argparse.ArgumentParser()
2324
1825
parser.add_argument("-v", "--version", action="version",
2325
version = "%(prog)s {}".format(version),
1826
version = "%%(prog)s %s" % version,
2326
1827
help="show version number and exit")
2327
1828
parser.add_argument("-i", "--interface", metavar="IF",
2328
1829
help="Bind to interface IF")
2334
1835
help="Run self-test")
2335
1836
parser.add_argument("--debug", action="store_true",
2336
1837
help="Debug mode; run in foreground and log"
2337
" to terminal", default=None)
1838
" to terminal")
2338
1839
parser.add_argument("--debuglevel", metavar="LEVEL",
2339
1840
help="Debug level for stdout output")
2340
1841
parser.add_argument("--priority", help="GnuTLS"
2347
1848
" files")
2348
1849
parser.add_argument("--no-dbus", action="store_false",
2349
1850
dest="use_dbus", help="Do not provide D-Bus"
2350
" system bus interface", default=None)
1851
" system bus interface")
2351
1852
parser.add_argument("--no-ipv6", action="store_false",
2352
dest="use_ipv6", help="Do not use IPv6",
2353
default=None)
2354
parser.add_argument("--no-restore", action="store_false",
2355
dest="restore", help="Do not restore stored"
2356
" state", default=None)
2357
parser.add_argument("--socket", type=int,
2358
help="Specify a file descriptor to a network"
2359
" socket to use instead of creating one")
2360
parser.add_argument("--statedir", metavar="DIR",
2361
help="Directory to save/restore state in")
2362
parser.add_argument("--foreground", action="store_true",
2363
help="Run in foreground", default=None)
2364
parser.add_argument("--no-zeroconf", action="store_false",
2365
dest="zeroconf", help="Do not use Zeroconf",
2366
default=None)
2367
1853
dest="use_ipv6", help="Do not use IPv6")
2368
1854
options = parser.parse_args()
2369
1855
2370
1856
if options.check:
2371
1857
import doctest
2372
fail_count, test_count = doctest.testmod()
2373
sys.exit(os.EX_OK if fail_count == 0 else 1)
1858
doctest.testmod()
1859
sys.exit()
2374
1860
2375
1861
# Default values for config file for server-global settings
2376
1862
server_defaults = { "interface": "",
2378
1864
"port": "",
2379
1865
"debug": "False",
2380
1866
"priority":
2381
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2382
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2383
1868
"servicename": "Mandos",
2384
1869
"use_dbus": "True",
2385
1870
"use_ipv6": "True",
2386
1871
"debuglevel": "",
2387
"restore": "True",
2388
"socket": "",
2389
"statedir": "/var/lib/mandos",
2390
"foreground": "False",
2391
"zeroconf": "True",
2392
}
1872
}
2393
1873
2394
1874
# Parse config file for server-global settings
2395
1875
server_config = configparser.SafeConfigParser(server_defaults)
2396
1876
del server_defaults
2397
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
2398
1879
# Convert the SafeConfigParser object to a dict
2399
1880
server_settings = server_config.defaults()
2400
1881
# Use the appropriate methods on the non-string config options
2401
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1882
for option in ("debug", "use_dbus", "use_ipv6"):
2402
1883
server_settings[option] = server_config.getboolean("DEFAULT",
2403
1884
option)
2404
1885
if server_settings["port"]:
2405
1886
server_settings["port"] = server_config.getint("DEFAULT",
2406
1887
"port")
2407
if server_settings["socket"]:
2408
server_settings["socket"] = server_config.getint("DEFAULT",
2409
"socket")
2410
# Later, stdin will, and stdout and stderr might, be dup'ed
2411
# over with an opened os.devnull. But we don't want this to
2412
# happen with a supplied network socket.
2413
if 0 <= server_settings["socket"] <= 2:
2414
server_settings["socket"] = os.dup(server_settings
2415
["socket"])
2416
1888
del server_config
2417
1889
2418
1890
# Override the settings from the config file with command line
2419
1891
# options, if set.
2420
1892
for option in ("interface", "address", "port", "debug",
2421
"priority", "servicename", "configdir", "use_dbus",
2422
"use_ipv6", "debuglevel", "restore", "statedir",
2423
"socket", "foreground", "zeroconf"):
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
2424
1895
value = getattr(options, option)
2425
1896
if value is not None:
2426
1897
server_settings[option] = value
2427
1898
del options
2428
1899
# Force all strings to be unicode
2429
1900
for option in server_settings.keys():
2430
if isinstance(server_settings[option], bytes):
2431
server_settings[option] = (server_settings[option]
2432
.decode("utf-8"))
2433
# Force all boolean options to be boolean
2434
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2435
"foreground", "zeroconf"):
2436
server_settings[option] = bool(server_settings[option])
2437
# Debug implies foreground
2438
if server_settings["debug"]:
2439
server_settings["foreground"] = True
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
2440
1903
# Now we have our good server settings in "server_settings"
2441
1904
2442
1905
##################################################################
2443
1906
2444
if (not server_settings["zeroconf"]
2445
and not (server_settings["port"]
2446
or server_settings["socket"] != "")):
2447
parser.error("Needs port or socket to work without Zeroconf")
2448
2449
1907
# For convenience
2450
1908
debug = server_settings["debug"]
2451
1909
debuglevel = server_settings["debuglevel"]
2452
1910
use_dbus = server_settings["use_dbus"]
2453
1911
use_ipv6 = server_settings["use_ipv6"]
2454
stored_state_path = os.path.join(server_settings["statedir"],
2455
stored_state_file)
2456
foreground = server_settings["foreground"]
2457
zeroconf = server_settings["zeroconf"]
2458
2459
if debug:
2460
initlogger(debug, logging.DEBUG)
2461
else:
2462
if not debuglevel:
2463
initlogger(debug)
2464
else:
2465
level = getattr(logging, debuglevel.upper())
2466
initlogger(debug, level)
2467
1912
2468
1913
if server_settings["servicename"] != "Mandos":
2469
syslogger.setFormatter(
2470
logging.Formatter('Mandos ({}) [%(process)d]:'
2471
' %(levelname)s: %(message)s'.format(
2472
server_settings["servicename"])))
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
2473
1918
2474
1919
# Parse config file with clients
2475
client_config = configparser.SafeConfigParser(Client
2476
.client_defaults)
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
2477
1929
client_config.read(os.path.join(server_settings["configdir"],
2478
1930
"clients.conf"))
2479
1931
2480
1932
global mandos_dbus_service
2481
1933
mandos_dbus_service = None
2482
1934
2483
socketfd = None
2484
if server_settings["socket"] != "":
2485
socketfd = server_settings["socket"]
2486
tcp_server = MandosServer(
2487
(server_settings["address"], server_settings["port"]),
2488
ClientHandler,
2489
interface=(server_settings["interface"] or None),
2490
use_ipv6=use_ipv6,
2491
gnutls_priority=server_settings["priority"],
2492
use_dbus=use_dbus,
2493
socketfd=socketfd)
2494
if not foreground:
2495
pidfilename = "/run/mandos.pid"
2496
if not os.path.isdir("/run/."):
2497
pidfilename = "/var/run/mandos.pid"
2498
pidfile = None
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
2499
1946
try:
2500
1947
pidfile = open(pidfilename, "w")
2501
except IOError as e:
2502
logger.error("Could not open file %r", pidfilename,
2503
exc_info=e)
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
2504
1950
2505
for name in ("_mandos", "mandos", "nobody"):
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
2506
1955
try:
2507
uid = pwd.getpwnam(name).pw_uid
2508
gid = pwd.getpwnam(name).pw_gid
2509
break
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
2510
1958
except KeyError:
2511
continue
2512
else:
2513
uid = 65534
2514
gid = 65534
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
2515
1965
try:
2516
1966
os.setgid(gid)
2517
1967
os.setuid(uid)
2518
1968
except OSError as error:
2519
if error.errno != errno.EPERM:
2520
raise
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
2521
1979
2522
1980
if debug:
2523
1981
# Enable all possible GnuTLS debugging
2530
1988
def debug_gnutls(level, string):
2531
1989
logger.debug("GnuTLS: %s", string[:-1])
2532
1990
2533
gnutls.library.functions.gnutls_global_set_log_function(
2534
debug_gnutls)
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
2535
1993
2536
1994
# Redirect stdin so all checkers get /dev/null
2537
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2538
1996
os.dup2(null, sys.stdin.fileno())
2539
1997
if null > 2:
2540
1998
os.close(null)
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2541
2002
2542
2003
# Need to fork before connecting to D-Bus
2543
if not foreground:
2004
if not debug:
2544
2005
# Close all input and output, do double fork, etc.
2545
2006
daemon()
2546
2007
2547
# multiprocessing will use threads, so before we use gobject we
2548
# need to inform gobject that threads will be used.
2549
gobject.threads_init()
2550
2551
2008
global main_loop
2552
2009
# From the Avahi example code
2553
DBusGMainLoop(set_as_default=True)
2010
DBusGMainLoop(set_as_default=True )
2554
2011
main_loop = gobject.MainLoop()
2555
2012
bus = dbus.SystemBus()
2556
2013
# End of Avahi example code
2557
2014
if use_dbus:
2558
2015
try:
2559
2016
bus_name = dbus.service.BusName("se.recompile.Mandos",
2560
bus,
2561
do_not_queue=True)
2562
old_bus_name = dbus.service.BusName(
2563
"se.bsnet.fukt.Mandos", bus,
2564
do_not_queue=True)
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2565
2021
except dbus.exceptions.NameExistsException as e:
2566
logger.error("Disabling D-Bus:", exc_info=e)
2022
logger.error(unicode(e) + ", disabling D-Bus")
2567
2023
use_dbus = False
2568
2024
server_settings["use_dbus"] = False
2569
2025
tcp_server.use_dbus = False
2570
if zeroconf:
2571
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2572
service = AvahiServiceToSyslog(
2573
name = server_settings["servicename"],
2574
servicetype = "_mandos._tcp",
2575
protocol = protocol,
2576
bus = bus)
2577
if server_settings["interface"]:
2578
service.interface = if_nametoindex(
2579
server_settings["interface"].encode("utf-8"))
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2580
2033
2581
2034
global multiprocessing_manager
2582
2035
multiprocessing_manager = multiprocessing.Manager()
2583
2036
2584
2037
client_class = Client
2585
2038
if use_dbus:
2586
client_class = functools.partial(ClientDBus, bus = bus)
2587
2588
client_settings = Client.config_parser(client_config)
2589
old_client_settings = {}
2590
clients_data = {}
2591
2592
# This is used to redirect stdout and stderr for checker processes
2593
global wnull
2594
wnull = open(os.devnull, "w") # A writable /dev/null
2595
# Only used if server is running in foreground but not in debug
2596
# mode
2597
if debug or not foreground:
2598
wnull.close()
2599
2600
# Get client data and settings from last running state.
2601
if server_settings["restore"]:
2602
try:
2603
with open(stored_state_path, "rb") as stored_state:
2604
clients_data, old_client_settings = pickle.load(
2605
stored_state)
2606
os.remove(stored_state_path)
2607
except IOError as e:
2608
if e.errno == errno.ENOENT:
2609
logger.warning("Could not load persistent state:"
2610
" {}".format(os.strerror(e.errno)))
2611
else:
2612
logger.critical("Could not load persistent state:",
2613
exc_info=e)
2614
raise
2615
except EOFError as e:
2616
logger.warning("Could not load persistent state: "
2617
"EOFError:",
2618
exc_info=e)
2619
2620
with PGPEngine() as pgp:
2621
for client_name, client in clients_data.items():
2622
# Skip removed clients
2623
if client_name not in client_settings:
2624
continue
2625
2626
# Decide which value to use after restoring saved state.
2627
# We have three different values: Old config file,
2628
# new config file, and saved state.
2629
# New config value takes precedence if it differs from old
2630
# config value, otherwise use saved state.
2631
for name, value in client_settings[client_name].items():
2632
try:
2633
# For each value in new config, check if it
2634
# differs from the old config value (Except for
2635
# the "secret" attribute)
2636
if (name != "secret"
2637
and (value !=
2638
old_client_settings[client_name][name])):
2639
client[name] = value
2640
except KeyError:
2641
pass
2642
2643
# Clients who has passed its expire date can still be
2644
# enabled if its last checker was successful. A Client
2645
# whose checker succeeded before we stored its state is
2646
# assumed to have successfully run all checkers during
2647
# downtime.
2648
if client["enabled"]:
2649
if datetime.datetime.utcnow() >= client["expires"]:
2650
if not client["last_checked_ok"]:
2651
logger.warning(
2652
"disabling client {} - Client never "
2653
"performed a successful checker".format(
2654
client_name))
2655
client["enabled"] = False
2656
elif client["last_checker_status"] != 0:
2657
logger.warning(
2658
"disabling client {} - Client last"
2659
" checker failed with error code"
2660
" {}".format(
2661
client_name,
2662
client["last_checker_status"]))
2663
client["enabled"] = False
2664
else:
2665
client["expires"] = (
2666
datetime.datetime.utcnow()
2667
+ client["timeout"])
2668
logger.debug("Last checker succeeded,"
2669
" keeping {} enabled".format(
2670
client_name))
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
2671
2048
try:
2672
client["secret"] = pgp.decrypt(
2673
client["encrypted_secret"],
2674
client_settings[client_name]["secret"])
2675
except PGPError:
2676
# If decryption fails, we use secret from new settings
2677
logger.debug("Failed to decrypt {} old secret".format(
2678
client_name))
2679
client["secret"] = (client_settings[client_name]
2680
["secret"])
2681
2682
# Add/remove clients based on new changes made to config
2683
for client_name in (set(old_client_settings)
2684
- set(client_settings)):
2685
del clients_data[client_name]
2686
for client_name in (set(client_settings)
2687
- set(old_client_settings)):
2688
clients_data[client_name] = client_settings[client_name]
2689
2690
# Create all client objects
2691
for client_name, client in clients_data.items():
2692
tcp_server.clients[client_name] = client_class(
2693
name = client_name,
2694
settings = client,
2695
server_settings = server_settings)
2696
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
2697
2058
if not tcp_server.clients:
2698
2059
logger.warning("No clients defined")
2699
2700
if not foreground:
2701
if pidfile is not None:
2702
try:
2703
with pidfile:
2704
pid = os.getpid()
2705
pidfile.write("{}\n".format(pid).encode("utf-8"))
2706
except IOError:
2707
logger.error("Could not write to file %r with PID %d",
2708
pidfilename, pid)
2709
del pidfile
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
2710
2073
del pidfilename
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2711
2076
2712
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2713
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2714
2079
2715
2080
if use_dbus:
2716
2717
@alternate_dbus_interfaces(
2718
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2719
class MandosDBusService(DBusObjectWithProperties):
2081
class MandosDBusService(dbus.service.Object):
2720
2082
"""A D-Bus proxy object"""
2721
2722
2083
def __init__(self):
2723
2084
dbus.service.Object.__init__(self, bus, "/")
2724
2725
2085
_interface = "se.recompile.Mandos"
2726
2086
2727
@dbus_interface_annotations(_interface)
2728
def _foo(self):
2729
return {
2730
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2731
"false" }
2732
2733
2087
@dbus.service.signal(_interface, signature="o")
2734
2088
def ClientAdded(self, objpath):
2735
2089
"D-Bus signal"
2748
2102
@dbus.service.method(_interface, out_signature="ao")
2749
2103
def GetAllClients(self):
2750
2104
"D-Bus method"
2751
return dbus.Array(c.dbus_object_path for c in
2752
tcp_server.clients.itervalues())
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2753
2107
2754
2108
@dbus.service.method(_interface,
2755
2109
out_signature="a{oa{sv}}")
2756
2110
def GetAllClientsWithProperties(self):
2757
2111
"D-Bus method"
2758
2112
return dbus.Dictionary(
2759
{ c.dbus_object_path: c.GetAll("")
2760
for c in tcp_server.clients.itervalues() },
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
2761
2115
signature="oa{sv}")
2762
2116
2763
2117
@dbus.service.method(_interface, in_signature="o")
2764
2118
def RemoveClient(self, object_path):
2765
2119
"D-Bus method"
2766
for c in tcp_server.clients.itervalues():
2120
for c in tcp_server.clients:
2767
2121
if c.dbus_object_path == object_path:
2768
del tcp_server.clients[c.name]
2122
tcp_server.clients.remove(c)
2769
2123
c.remove_from_connection()
2770
2124
# Don't signal anything except ClientRemoved
2771
2125
c.disable(quiet=True)
2776
2130
2777
2131
del _interface
2778
2132
2779
mandos_dbus_service = MandosDBusService()
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2780
2136
2781
2137
def cleanup():
2782
2138
"Cleanup function; run on exit"
2783
if zeroconf:
2784
service.cleanup()
2139
service.cleanup()
2785
2140
2786
2141
multiprocessing.active_children()
2787
wnull.close()
2788
if not (tcp_server.clients or client_settings):
2789
return
2790
2791
# Store client before exiting. Secrets are encrypted with key
2792
# based on what config file has. If config file is
2793
# removed/edited, old secret will thus be unrecovable.
2794
clients = {}
2795
with PGPEngine() as pgp:
2796
for client in tcp_server.clients.itervalues():
2797
key = client_settings[client.name]["secret"]
2798
client.encrypted_secret = pgp.encrypt(client.secret,
2799
key)
2800
client_dict = {}
2801
2802
# A list of attributes that can not be pickled
2803
# + secret.
2804
exclude = { "bus", "changedstate", "secret",
2805
"checker", "server_settings" }
2806
for name, typ in inspect.getmembers(dbus.service
2807
.Object):
2808
exclude.add(name)
2809
2810
client_dict["encrypted_secret"] = (client
2811
.encrypted_secret)
2812
for attr in client.client_structure:
2813
if attr not in exclude:
2814
client_dict[attr] = getattr(client, attr)
2815
2816
clients[client.name] = client_dict
2817
del client_settings[client.name]["secret"]
2818
2819
try:
2820
with tempfile.NamedTemporaryFile(
2821
mode='wb',
2822
suffix=".pickle",
2823
prefix='clients-',
2824
dir=os.path.dirname(stored_state_path),
2825
delete=False) as stored_state:
2826
pickle.dump((clients, client_settings), stored_state)
2827
tempname = stored_state.name
2828
os.rename(tempname, stored_state_path)
2829
except (IOError, OSError) as e:
2830
if not debug:
2831
try:
2832
os.remove(tempname)
2833
except NameError:
2834
pass
2835
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2836
logger.warning("Could not save persistent state: {}"
2837
.format(os.strerror(e.errno)))
2838
else:
2839
logger.warning("Could not save persistent state:",
2840
exc_info=e)
2841
raise
2842
2843
# Delete all clients, and settings from config
2844
2142
while tcp_server.clients:
2845
name, client = tcp_server.clients.popitem()
2143
client = tcp_server.clients.pop()
2846
2144
if use_dbus:
2847
2145
client.remove_from_connection()
2146
client.disable_hook = None
2848
2147
# Don't signal anything except ClientRemoved
2849
2148
client.disable(quiet=True)
2850
2149
if use_dbus:
2851
2150
# Emit D-Bus signal
2852
mandos_dbus_service.ClientRemoved(
2853
client.dbus_object_path, client.name)
2854
client_settings.clear()
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2855
2154
2856
2155
atexit.register(cleanup)
2857
2156
2858
for client in tcp_server.clients.itervalues():
2157
for client in tcp_server.clients:
2859
2158
if use_dbus:
2860
2159
# Emit D-Bus signal
2861
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2862
# Need to initiate checking of clients
2863
if client.enabled:
2864
client.init_checker()
2161
client.enable()
2865
2162
2866
2163
tcp_server.enable()
2867
2164
tcp_server.server_activate()
2868
2165
2869
2166
# Find out what port we got
2870
if zeroconf:
2871
service.port = tcp_server.socket.getsockname()[1]
2167
service.port = tcp_server.socket.getsockname()[1]
2872
2168
if use_ipv6:
2873
2169
logger.info("Now listening on address %r, port %d,"
2874
" flowinfo %d, scope_id %d",
2875
*tcp_server.socket.getsockname())
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
2876
2172
else: # IPv4
2877
logger.info("Now listening on address %r, port %d",
2878
*tcp_server.socket.getsockname())
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2879
2175
2880
2176
#service.interface = tcp_server.socket.getsockname()[3]
2881
2177
2882
2178
try:
2883
if zeroconf:
2884
# From the Avahi example code
2885
try:
2886
service.activate()
2887
except dbus.exceptions.DBusException as error:
2888
logger.critical("D-Bus Exception", exc_info=error)
2889
cleanup()
2890
sys.exit(1)
2891
# End of Avahi example code
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2892
2187
2893
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2894
2189
lambda *args, **kwargs:
2898
2193
logger.debug("Starting main loop")
2899
2194
main_loop.run()
2900
2195
except AvahiError as error:
2901
logger.critical("Avahi Error", exc_info=error)
2196
logger.critical("AvahiError: %s", error)
2902
2197
cleanup()
2903
2198
sys.exit(1)
2904
2199
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0