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- Committer: Björn Påhlsson
- Date: 2011-12-21 00:33:12 UTC
- mfrom: (505.2.13 mandos-client-network-hooks)
- Revision ID: belorn@recompile.se-20111221003312-jwn6d76u2c2lejoz
working new feature: network-hooks - Enables user-scripts to take up
interfaces during bootup
interfaces during bootup
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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16
#
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# 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
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
67
73
from dbus.mainloop.glib import DBusGMainLoop
68
74
import ctypes
69
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
70
79
71
80
try:
72
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
85
except ImportError:
77
86
SO_BINDTODEVICE = None
78
87
79
80
version = "1.0.12"
81
82
logger = logging.Logger(u'mandos')
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
83
92
syslogger = (logging.handlers.SysLogHandler
84
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
96
209
97
210
class AvahiError(Exception):
98
211
def __init__(self, value, *args, **kwargs):
114
227
Attributes:
115
228
interface: integer; avahi.IF_UNSPEC or an interface index.
116
229
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
119
232
See <http://www.dns-sd.org/ServiceTypes.html>
120
233
port: integer; what port to announce
121
234
TXT: list of strings; TXT record for the service
130
243
"""
131
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
245
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
246
domain = "", host = "", max_renames = 32768,
134
247
protocol = avahi.PROTO_UNSPEC, bus = None):
135
248
self.interface = interface
136
249
self.name = name
145
258
self.group = None # our entry group
146
259
self.server = None
147
260
self.bus = bus
261
self.entry_group_state_changed_match = None
148
262
def rename(self):
149
263
"""Derived from the Avahi example code"""
150
264
if self.rename_count >= self.max_renames:
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
153
267
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
268
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
162
273
self.remove()
163
self.add()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
164
280
self.rename_count += 1
165
281
def remove(self):
166
282
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
167
286
if self.group is not None:
168
287
self.group.Reset()
169
288
def add(self):
170
289
"""Derived from the Avahi example code"""
290
self.remove()
171
291
if self.group is None:
172
292
self.group = dbus.Interface(
173
293
self.bus.get_object(avahi.DBUS_NAME,
174
294
self.server.EntryGroupNew()),
175
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self
178
.entry_group_state_changed)
179
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
180
300
self.name, self.type)
181
301
self.group.AddService(
182
302
self.interface,
189
309
self.group.Commit()
190
310
def entry_group_state_changed(self, state, error):
191
311
"""Derived from the Avahi example code"""
192
logger.debug(u"Avahi state change: %i", state)
312
logger.debug("Avahi entry group state change: %i", state)
193
313
194
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
195
logger.debug(u"Zeroconf service established.")
315
logger.debug("Zeroconf service established.")
196
316
elif state == avahi.ENTRY_GROUP_COLLISION:
197
logger.warning(u"Zeroconf service name collision.")
317
logger.info("Zeroconf service name collision.")
198
318
self.rename()
199
319
elif state == avahi.ENTRY_GROUP_FAILURE:
200
logger.critical(u"Avahi: Error in group state changed %s",
320
logger.critical("Avahi: Error in group state changed %s",
201
321
unicode(error))
202
raise AvahiGroupError(u"State changed: %s"
322
raise AvahiGroupError("State changed: %s"
203
323
% unicode(error))
204
324
def cleanup(self):
205
325
"""Derived from the Avahi example code"""
206
326
if self.group is not None:
207
self.group.Free()
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
208
332
self.group = None
209
def server_state_changed(self, state):
333
self.remove()
334
def server_state_changed(self, state, error=None):
210
335
"""Derived from the Avahi example code"""
211
if state == avahi.SERVER_COLLISION:
212
logger.error(u"Zeroconf server name collision")
213
self.remove()
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
214
351
elif state == avahi.SERVER_RUNNING:
215
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
216
358
def activate(self):
217
359
"""Derived from the Avahi example code"""
218
360
if self.server is None:
219
361
self.server = dbus.Interface(
220
362
self.bus.get_object(avahi.DBUS_NAME,
221
avahi.DBUS_PATH_SERVER),
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
222
365
avahi.DBUS_INTERFACE_SERVER)
223
self.server.connect_to_signal(u"StateChanged",
366
self.server.connect_to_signal("StateChanged",
224
367
self.server_state_changed)
225
368
self.server_state_changed(self.server.GetState())
226
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
227
379
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
228
386
class Client(object):
229
387
"""A representation of a client host served by this server.
230
388
231
389
Attributes:
232
name: string; from the config file, used in log messages and
233
D-Bus identifiers
234
fingerprint: string (40 or 32 hexadecimal digits); used to
235
uniquely identify the client
236
secret: bytestring; sent verbatim (over TLS) to client
237
host: string; available for use by the checker command
238
created: datetime.datetime(); (UTC) object creation
239
last_enabled: datetime.datetime(); (UTC)
240
enabled: bool()
241
last_checked_ok: datetime.datetime(); (UTC) or None
242
timeout: datetime.timedelta(); How long from last_checked_ok
243
until this client is invalid
244
interval: datetime.timedelta(); How often to start a new checker
245
disable_hook: If set, called by disable() as disable_hook(self)
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
246
393
checker: subprocess.Popen(); a running checker process used
247
394
to see if the client lives.
248
395
'None' if no process is running.
249
checker_initiator_tag: a gobject event source tag, or None
250
disable_initiator_tag: - '' -
251
checker_callback_tag: - '' -
252
checker_command: string; External command which is run to check if
253
client lives. %() expansions are done at
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
254
399
runtime with vars(self) as dict, so that for
255
400
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
256
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
last_checker_status: integer between 0 and 255 reflecting exit
415
status of last checker. -1 reflects crashed
416
checker, or None.
417
last_enabled: datetime.datetime(); (UTC) or None
418
name: string; from the config file, used in log messages and
419
D-Bus identifiers
420
secret: bytestring; sent verbatim (over TLS) to client
421
timeout: datetime.timedelta(); How long from last_checked_ok
422
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
424
runtime_expansions: Allowed attributes for runtime expansion.
425
expires: datetime.datetime(); time (UTC) when a client will be
426
disabled, or None
257
427
"""
258
428
259
@staticmethod
260
def _datetime_to_milliseconds(dt):
261
"Convert a datetime.datetime() to milliseconds"
262
return ((dt.days * 24 * 60 * 60 * 1000)
263
+ (dt.seconds * 1000)
264
+ (dt.microseconds // 1000))
429
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
432
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
265
443
266
444
def timeout_milliseconds(self):
267
445
"Return the 'timeout' attribute in milliseconds"
268
return self._datetime_to_milliseconds(self.timeout)
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
269
451
270
452
def interval_milliseconds(self):
271
453
"Return the 'interval' attribute in milliseconds"
272
return self._datetime_to_milliseconds(self.interval)
454
return timedelta_to_milliseconds(self.interval)
273
455
274
def __init__(self, name = None, disable_hook=None, config=None):
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
459
@staticmethod
460
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
462
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
464
settings = {}
465
for client_name in config.sections():
466
section = dict(config.items(client_name))
467
client = settings[client_name] = {}
468
469
client["host"] = section["host"]
470
# Reformat values from string types to Python types
471
client["approved_by_default"] = config.getboolean(
472
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
475
client["fingerprint"] = (section["fingerprint"].upper()
476
.replace(" ", ""))
477
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
479
elif "secfile" in section:
480
with open(os.path.expanduser(os.path.expandvars
481
(section["secfile"])),
482
"rb") as secfile:
483
client["secret"] = secfile.read()
484
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
487
client["timeout"] = string_to_delta(section["timeout"])
488
client["extended_timeout"] = string_to_delta(
489
section["extended_timeout"])
490
client["interval"] = string_to_delta(section["interval"])
491
client["approval_delay"] = string_to_delta(
492
section["approval_delay"])
493
client["approval_duration"] = string_to_delta(
494
section["approval_duration"])
495
client["checker_command"] = section["checker"]
496
client["last_approval_request"] = None
497
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
275
511
"""Note: the 'checker' key in 'config' sets the
276
512
'checker_command' attribute and *not* the 'checker'
277
513
attribute."""
278
514
self.name = name
279
if config is None:
280
config = {}
281
logger.debug(u"Creating client %r", self.name)
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
logger.debug("Creating client %r", self.name)
282
520
# Uppercase and remove spaces from fingerprint for later
283
521
# comparison purposes with return value from the fingerprint()
284
522
# function
285
self.fingerprint = (config[u"fingerprint"].upper()
286
.replace(u" ", u""))
287
logger.debug(u" Fingerprint: %s", self.fingerprint)
288
if u"secret" in config:
289
self.secret = config[u"secret"].decode(u"base64")
290
elif u"secfile" in config:
291
with closing(open(os.path.expanduser
292
(os.path.expandvars
293
(config[u"secfile"])))) as secfile:
294
self.secret = secfile.read()
295
else:
296
raise TypeError(u"No secret or secfile for client %s"
297
% self.name)
298
self.host = config.get(u"host", u"")
299
self.created = datetime.datetime.utcnow()
300
self.enabled = False
301
self.last_enabled = None
302
self.last_checked_ok = None
303
self.timeout = string_to_delta(config[u"timeout"])
304
self.interval = string_to_delta(config[u"interval"])
305
self.disable_hook = disable_hook
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# attributes specific for this server instance
306
527
self.checker = None
307
528
self.checker_initiator_tag = None
308
529
self.disable_initiator_tag = None
309
530
self.checker_callback_tag = None
310
self.checker_command = config[u"checker"]
311
531
self.current_checker_command = None
312
self.last_connect = None
532
self.approved = None
533
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
539
if not attr.startswith("_")]
540
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
546
if not name.startswith("_"):
547
self.client_structure.append(name)
548
549
# Send notice to process children that client state has changed
550
def send_changedstate(self):
551
with self.changedstate:
552
self.changedstate.notify_all()
313
553
314
554
def enable(self):
315
555
"""Start this client's checker and timeout hooks"""
316
if getattr(self, u"enabled", False):
556
if getattr(self, "enabled", False):
317
557
# Already enabled
318
558
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
319
562
self.last_enabled = datetime.datetime.utcnow()
563
self.init_checker()
564
565
def disable(self, quiet=True):
566
"""Disable this client."""
567
if not getattr(self, "enabled", False):
568
return False
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
575
self.disable_initiator_tag = None
576
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
579
self.checker_initiator_tag = None
580
self.stop_checker()
581
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
583
return False
584
585
def __del__(self):
586
self.disable()
587
588
def init_checker(self):
320
589
# Schedule a new checker to be started an 'interval' from now,
321
590
# and every interval from then on.
322
591
self.checker_initiator_tag = (gobject.timeout_add
323
592
(self.interval_milliseconds(),
324
593
self.start_checker))
325
# Also start a new checker *right now*.
326
self.start_checker()
327
594
# Schedule a disable() when 'timeout' has passed
328
595
self.disable_initiator_tag = (gobject.timeout_add
329
596
(self.timeout_milliseconds(),
330
597
self.disable))
331
self.enabled = True
332
333
def disable(self):
334
"""Disable this client."""
335
if not getattr(self, "enabled", False):
336
return False
337
logger.info(u"Disabling client %s", self.name)
338
if getattr(self, u"disable_initiator_tag", False):
339
gobject.source_remove(self.disable_initiator_tag)
340
self.disable_initiator_tag = None
341
if getattr(self, u"checker_initiator_tag", False):
342
gobject.source_remove(self.checker_initiator_tag)
343
self.checker_initiator_tag = None
344
self.stop_checker()
345
if self.disable_hook:
346
self.disable_hook(self)
347
self.enabled = False
348
# Do not run this again if called by a gobject.timeout_add
349
return False
350
351
def __del__(self):
352
self.disable_hook = None
353
self.disable()
598
# Also start a new checker *right now*.
599
self.start_checker()
354
600
355
601
def checker_callback(self, pid, condition, command):
356
602
"""The checker has completed, so take appropriate actions."""
357
603
self.checker_callback_tag = None
358
604
self.checker = None
359
605
if os.WIFEXITED(condition):
360
exitstatus = os.WEXITSTATUS(condition)
361
if exitstatus == 0:
362
logger.info(u"Checker for %(name)s succeeded",
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
363
609
vars(self))
364
610
self.checked_ok()
365
611
else:
366
logger.info(u"Checker for %(name)s failed",
612
logger.info("Checker for %(name)s failed",
367
613
vars(self))
368
614
else:
369
logger.warning(u"Checker for %(name)s crashed?",
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
370
617
vars(self))
371
618
372
def checked_ok(self):
619
def checked_ok(self, timeout=None):
373
620
"""Bump up the timeout for this client.
374
621
375
622
This should only be called when the client has been seen,
376
623
alive and well.
377
624
"""
625
if timeout is None:
626
timeout = self.timeout
378
627
self.last_checked_ok = datetime.datetime.utcnow()
379
gobject.source_remove(self.disable_initiator_tag)
380
self.disable_initiator_tag = (gobject.timeout_add
381
(self.timeout_milliseconds(),
382
self.disable))
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
634
self.expires = datetime.datetime.utcnow() + timeout
635
636
def need_approval(self):
637
self.last_approval_request = datetime.datetime.utcnow()
383
638
384
639
def start_checker(self):
385
640
"""Start a new checker subprocess if one is not running.
392
647
# client would inevitably timeout, since no checker would get
393
648
# a chance to run to completion. If we instead leave running
394
649
# checkers alone, the checker would have to take more time
395
# than 'timeout' for the client to be declared invalid, which
396
# is as it should be.
650
# than 'timeout' for the client to be disabled, which is as it
651
# should be.
397
652
398
653
# If a checker exists, make sure it is not a zombie
399
if self.checker is not None:
654
try:
400
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
657
if (isinstance(error, OSError)
658
and error.errno != errno.ECHILD):
659
raise error
660
else:
401
661
if pid:
402
logger.warning(u"Checker was a zombie")
662
logger.warning("Checker was a zombie")
403
663
gobject.source_remove(self.checker_callback_tag)
404
664
self.checker_callback(pid, status,
405
665
self.current_checker_command)
410
670
command = self.checker_command % self.host
411
671
except TypeError:
412
672
# Escape attributes for the shell
413
escaped_attrs = dict((key,
414
re.escape(unicode(str(val),
415
errors=
416
u'replace')))
417
for key, val in
418
vars(self).iteritems())
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
419
681
try:
420
682
command = self.checker_command % escaped_attrs
421
except TypeError, error:
422
logger.error(u'Could not format string "%s":'
423
u' %s', self.checker_command, error)
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
424
686
return True # Try again later
425
687
self.current_checker_command = command
426
688
try:
427
logger.info(u"Starting checker %r for %s",
689
logger.info("Starting checker %r for %s",
428
690
command, self.name)
429
691
# We don't need to redirect stdout and stderr, since
430
692
# in normal mode, that is already done by daemon(),
432
694
# always replaced by /dev/null.)
433
695
self.checker = subprocess.Popen(command,
434
696
close_fds=True,
435
shell=True, cwd=u"/")
697
shell=True, cwd="/")
436
698
self.checker_callback_tag = (gobject.child_watch_add
437
699
(self.checker.pid,
438
700
self.checker_callback,
443
705
if pid:
444
706
gobject.source_remove(self.checker_callback_tag)
445
707
self.checker_callback(pid, status, command)
446
except OSError, error:
447
logger.error(u"Failed to start subprocess: %s",
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
448
710
error)
449
711
# Re-run this periodically if run by gobject.timeout_add
450
712
return True
454
716
if self.checker_callback_tag:
455
717
gobject.source_remove(self.checker_callback_tag)
456
718
self.checker_callback_tag = None
457
if getattr(self, u"checker", None) is None:
719
if getattr(self, "checker", None) is None:
458
720
return
459
logger.debug(u"Stopping checker for %(name)s", vars(self))
721
logger.debug("Stopping checker for %(name)s", vars(self))
460
722
try:
461
723
os.kill(self.checker.pid, signal.SIGTERM)
462
#os.sleep(0.5)
724
#time.sleep(0.5)
463
725
#if self.checker.poll() is None:
464
726
# os.kill(self.checker.pid, signal.SIGKILL)
465
except OSError, error:
727
except OSError as error:
466
728
if error.errno != errno.ESRCH: # No such process
467
729
raise
468
730
self.checker = None
469
470
def still_valid(self):
471
"""Has the timeout not yet passed for this client?"""
472
if not getattr(self, u"enabled", False):
473
return False
474
now = datetime.datetime.utcnow()
475
if self.last_checked_ok is None:
476
return now < (self.created + self.timeout)
477
else:
478
return now < (self.last_checked_ok + self.timeout)
479
480
481
class ClientDBus(Client, dbus.service.Object):
731
732
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
735
"""Decorators for marking methods of a DBusObjectWithProperties to
736
become properties on the D-Bus.
737
738
The decorated method will be called with no arguments by "Get"
739
and with one argument by "Set".
740
741
The parameters, where they are supported, are the same as
742
dbus.service.method, except there is only "signature", since the
743
type from Get() and the type sent to Set() is the same.
744
"""
745
# Encoding deeply encoded byte arrays is not supported yet by the
746
# "Set" method, so we fail early here:
747
if byte_arrays and signature != "ay":
748
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
750
def decorator(func):
751
func._dbus_is_property = True
752
func._dbus_interface = dbus_interface
753
func._dbus_signature = signature
754
func._dbus_access = access
755
func._dbus_name = func.__name__
756
if func._dbus_name.endswith("_dbus_property"):
757
func._dbus_name = func._dbus_name[:-14]
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
759
return func
760
return decorator
761
762
763
class DBusPropertyException(dbus.exceptions.DBusException):
764
"""A base class for D-Bus property-related exceptions
765
"""
766
def __unicode__(self):
767
return unicode(str(self))
768
769
770
class DBusPropertyAccessException(DBusPropertyException):
771
"""A property's access permissions disallows an operation.
772
"""
773
pass
774
775
776
class DBusPropertyNotFound(DBusPropertyException):
777
"""An attempt was made to access a non-existing property.
778
"""
779
pass
780
781
782
class DBusObjectWithProperties(dbus.service.Object):
783
"""A D-Bus object with properties.
784
785
Classes inheriting from this can use the dbus_service_property
786
decorator to expose methods as D-Bus properties. It exposes the
787
standard Get(), Set(), and GetAll() methods on the D-Bus.
788
"""
789
790
@staticmethod
791
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
793
794
def _get_all_dbus_properties(self):
795
"""Returns a generator of (name, attribute) pairs
796
"""
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
799
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
801
802
def _get_dbus_property(self, interface_name, property_name):
803
"""Returns a bound method if one exists which is a D-Bus
804
property with the specified name and interface.
805
"""
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
809
if (value._dbus_name == property_name
810
and value._dbus_interface == interface_name):
811
return value.__get__(self)
812
813
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
816
+ property_name)
817
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
819
out_signature="v")
820
def Get(self, interface_name, property_name):
821
"""Standard D-Bus property Get() method, see D-Bus standard.
822
"""
823
prop = self._get_dbus_property(interface_name, property_name)
824
if prop._dbus_access == "write":
825
raise DBusPropertyAccessException(property_name)
826
value = prop()
827
if not hasattr(value, "variant_level"):
828
return value
829
return type(value)(value, variant_level=value.variant_level+1)
830
831
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
832
def Set(self, interface_name, property_name, value):
833
"""Standard D-Bus property Set() method, see D-Bus standard.
834
"""
835
prop = self._get_dbus_property(interface_name, property_name)
836
if prop._dbus_access == "read":
837
raise DBusPropertyAccessException(property_name)
838
if prop._dbus_get_args_options["byte_arrays"]:
839
# The byte_arrays option is not supported yet on
840
# signatures other than "ay".
841
if prop._dbus_signature != "ay":
842
raise ValueError
843
value = dbus.ByteArray(''.join(unichr(byte)
844
for byte in value))
845
prop(value)
846
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
848
out_signature="a{sv}")
849
def GetAll(self, interface_name):
850
"""Standard D-Bus property GetAll() method, see D-Bus
851
standard.
852
853
Note: Will not include properties with access="write".
854
"""
855
properties = {}
856
for name, prop in self._get_all_dbus_properties():
857
if (interface_name
858
and interface_name != prop._dbus_interface):
859
# Interface non-empty but did not match
860
continue
861
# Ignore write-only properties
862
if prop._dbus_access == "write":
863
continue
864
value = prop()
865
if not hasattr(value, "variant_level"):
866
properties[name] = value
867
continue
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
870
return dbus.Dictionary(properties, signature="sv")
871
872
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
out_signature="s",
874
path_keyword='object_path',
875
connection_keyword='connection')
876
def Introspect(self, object_path, connection):
877
"""Standard D-Bus method, overloaded to insert property tags.
878
"""
879
xmlstring = dbus.service.Object.Introspect(self, object_path,
880
connection)
881
try:
882
document = xml.dom.minidom.parseString(xmlstring)
883
def make_tag(document, name, prop):
884
e = document.createElement("property")
885
e.setAttribute("name", name)
886
e.setAttribute("type", prop._dbus_signature)
887
e.setAttribute("access", prop._dbus_access)
888
return e
889
for if_tag in document.getElementsByTagName("interface"):
890
for tag in (make_tag(document, name, prop)
891
for name, prop
892
in self._get_all_dbus_properties()
893
if prop._dbus_interface
894
== if_tag.getAttribute("name")):
895
if_tag.appendChild(tag)
896
# Add the names to the return values for the
897
# "org.freedesktop.DBus.Properties" methods
898
if (if_tag.getAttribute("name")
899
== "org.freedesktop.DBus.Properties"):
900
for cn in if_tag.getElementsByTagName("method"):
901
if cn.getAttribute("name") == "Get":
902
for arg in cn.getElementsByTagName("arg"):
903
if (arg.getAttribute("direction")
904
== "out"):
905
arg.setAttribute("name", "value")
906
elif cn.getAttribute("name") == "GetAll":
907
for arg in cn.getElementsByTagName("arg"):
908
if (arg.getAttribute("direction")
909
== "out"):
910
arg.setAttribute("name", "props")
911
xmlstring = document.toxml("utf-8")
912
document.unlink()
913
except (AttributeError, xml.dom.DOMException,
914
xml.parsers.expat.ExpatError) as error:
915
logger.error("Failed to override Introspection method",
916
error)
917
return xmlstring
918
919
920
def datetime_to_dbus (dt, variant_level=0):
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
932
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
940
# Ignore non-D-Bus attributes, and D-Bus attributes
941
# with the wrong interface name
942
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
945
continue
946
# Create an alternate D-Bus interface name based on
947
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
951
# Is this a D-Bus signal?
952
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
956
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
959
# Create a new, but exactly alike, function
960
# object, and decorate it to be a new D-Bus signal
961
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
971
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
974
def fixscope(func1, func2):
975
"""This function is a scope container to pass
976
func1 and func2 to the "call_both" function
977
outside of its arguments"""
978
def call_both(*args, **kwargs):
979
"""This function will emit two D-Bus
980
signals by calling func1 and func2"""
981
func1(*args, **kwargs)
982
func2(*args, **kwargs)
983
return call_both
984
# Create the "call_both" function and add it to
985
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
988
# Is this a D-Bus method?
989
elif getattr(attribute, "_dbus_is_method", False):
990
# Create a new, but exactly alike, function
991
# object. Decorate it to be a new D-Bus method
992
# with the alternate D-Bus interface name. Add it
993
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1004
# Is this a D-Bus property?
1005
elif getattr(attribute, "_dbus_is_property", False):
1006
# Create a new, but exactly alike, function
1007
# object, and decorate it to be a new D-Bus
1008
# property with the alternate D-Bus interface
1009
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1026
class ClientDBus(Client, DBusObjectWithProperties):
482
1027
"""A Client class using D-Bus
483
1028
484
1029
Attributes:
485
1030
dbus_object_path: dbus.ObjectPath
486
1031
bus: dbus.SystemBus()
487
1032
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
488
1037
# dbus.service.Object doesn't use super(), so we can't either.
489
1038
490
1039
def __init__(self, bus = None, *args, **kwargs):
491
1040
self.bus = bus
492
1041
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
493
1045
# Only now, when this client is initialized, can it show up on
494
1046
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
495
1050
self.dbus_object_path = (dbus.ObjectPath
496
(u"/clients/"
497
+ self.name.replace(u".", u"_")))
498
dbus.service.Object.__init__(self, self.bus,
499
self.dbus_object_path)
500
501
@staticmethod
502
def _datetime_to_dbus(dt, variant_level=0):
503
"""Convert a UTC datetime.datetime() to a D-Bus type."""
504
return dbus.String(dt.isoformat(),
505
variant_level=variant_level)
506
507
def enable(self):
508
oldstate = getattr(self, u"enabled", False)
509
r = Client.enable(self)
510
if oldstate != self.enabled:
511
# Emit D-Bus signals
512
self.PropertyChanged(dbus.String(u"enabled"),
513
dbus.Boolean(True, variant_level=1))
514
self.PropertyChanged(
515
dbus.String(u"last_enabled"),
516
self._datetime_to_dbus(self.last_enabled,
517
variant_level=1))
518
return r
519
520
def disable(self, signal = True):
521
oldstate = getattr(self, u"enabled", False)
522
r = Client.disable(self)
523
if signal and oldstate != self.enabled:
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"enabled"),
526
dbus.Boolean(False, variant_level=1))
527
return r
1051
("/clients/" + client_object_name))
1052
DBusObjectWithProperties.__init__(self, self.bus,
1053
self.dbus_object_path)
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1058
""" Modify a variable so that it's a property which announces
1059
its changes to DBus.
1060
1061
transform_fun: Function that takes a value and a variant_level
1062
and transforms it to a D-Bus type.
1063
dbus_name: D-Bus name of the variable
1064
type_func: Function that transform the value before sending it
1065
to the D-Bus. Default: no transform
1066
variant_level: D-Bus variant level. Default: 1
1067
"""
1068
attrname = "_{0}".format(dbus_name)
1069
def setter(self, value):
1070
if hasattr(self, "dbus_object_path"):
1071
if (not hasattr(self, attrname) or
1072
type_func(getattr(self, attrname, None))
1073
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1079
setattr(self, attrname, value)
1080
1081
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
"ApprovalPending",
1087
type_func = bool)
1088
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
"LastCheckedOK")
1096
last_approval_request = notifychangeproperty(
1097
datetime_to_dbus, "LastApprovalRequest")
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1104
approval_duration = notifychangeproperty(
1105
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1107
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
extended_timeout = notifychangeproperty(
1112
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1120
del notifychangeproperty
528
1121
529
1122
def __del__(self, *args, **kwargs):
530
1123
try:
531
1124
self.remove_from_connection()
532
1125
except LookupError:
533
1126
pass
534
if hasattr(dbus.service.Object, u"__del__"):
535
dbus.service.Object.__del__(self, *args, **kwargs)
1127
if hasattr(DBusObjectWithProperties, "__del__"):
1128
DBusObjectWithProperties.__del__(self, *args, **kwargs)
536
1129
Client.__del__(self, *args, **kwargs)
537
1130
538
1131
def checker_callback(self, pid, condition, command,
539
1132
*args, **kwargs):
540
1133
self.checker_callback_tag = None
541
1134
self.checker = None
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"checker_running"),
544
dbus.Boolean(False, variant_level=1))
545
1135
if os.WIFEXITED(condition):
546
1136
exitstatus = os.WEXITSTATUS(condition)
547
1137
# Emit D-Bus signal
557
1147
return Client.checker_callback(self, pid, condition, command,
558
1148
*args, **kwargs)
559
1149
560
def checked_ok(self, *args, **kwargs):
561
r = Client.checked_ok(self, *args, **kwargs)
562
# Emit D-Bus signal
563
self.PropertyChanged(
564
dbus.String(u"last_checked_ok"),
565
(self._datetime_to_dbus(self.last_checked_ok,
566
variant_level=1)))
567
return r
568
569
1150
def start_checker(self, *args, **kwargs):
570
1151
old_checker = self.checker
571
1152
if self.checker is not None:
578
1159
and old_checker_pid != self.checker.pid):
579
1160
# Emit D-Bus signal
580
1161
self.CheckerStarted(self.current_checker_command)
581
self.PropertyChanged(
582
dbus.String(u"checker_running"),
583
dbus.Boolean(True, variant_level=1))
584
return r
585
586
def stop_checker(self, *args, **kwargs):
587
old_checker = getattr(self, u"checker", None)
588
r = Client.stop_checker(self, *args, **kwargs)
589
if (old_checker is not None
590
and getattr(self, u"checker", None) is None):
591
self.PropertyChanged(dbus.String(u"checker_running"),
592
dbus.Boolean(False, variant_level=1))
593
return r
594
595
## D-Bus methods & signals
596
_interface = u"se.bsnet.fukt.Mandos.Client"
597
598
# CheckedOK - method
599
@dbus.service.method(_interface)
600
def CheckedOK(self):
601
return self.checked_ok()
1162
return r
1163
1164
def _reset_approved(self):
1165
self.approved = None
1166
return False
1167
1168
def approve(self, value=True):
1169
self.send_changedstate()
1170
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
602
1180
603
1181
# CheckerCompleted - signal
604
@dbus.service.signal(_interface, signature=u"nxs")
1182
@dbus.service.signal(_interface, signature="nxs")
605
1183
def CheckerCompleted(self, exitcode, waitstatus, command):
606
1184
"D-Bus signal"
607
1185
pass
608
1186
609
1187
# CheckerStarted - signal
610
@dbus.service.signal(_interface, signature=u"s")
1188
@dbus.service.signal(_interface, signature="s")
611
1189
def CheckerStarted(self, command):
612
1190
"D-Bus signal"
613
1191
pass
614
1192
615
# GetAllProperties - method
616
@dbus.service.method(_interface, out_signature=u"a{sv}")
617
def GetAllProperties(self):
618
"D-Bus method"
619
return dbus.Dictionary({
620
dbus.String(u"name"):
621
dbus.String(self.name, variant_level=1),
622
dbus.String(u"fingerprint"):
623
dbus.String(self.fingerprint, variant_level=1),
624
dbus.String(u"host"):
625
dbus.String(self.host, variant_level=1),
626
dbus.String(u"created"):
627
self._datetime_to_dbus(self.created,
628
variant_level=1),
629
dbus.String(u"last_enabled"):
630
(self._datetime_to_dbus(self.last_enabled,
631
variant_level=1)
632
if self.last_enabled is not None
633
else dbus.Boolean(False, variant_level=1)),
634
dbus.String(u"enabled"):
635
dbus.Boolean(self.enabled, variant_level=1),
636
dbus.String(u"last_checked_ok"):
637
(self._datetime_to_dbus(self.last_checked_ok,
638
variant_level=1)
639
if self.last_checked_ok is not None
640
else dbus.Boolean (False, variant_level=1)),
641
dbus.String(u"timeout"):
642
dbus.UInt64(self.timeout_milliseconds(),
643
variant_level=1),
644
dbus.String(u"interval"):
645
dbus.UInt64(self.interval_milliseconds(),
646
variant_level=1),
647
dbus.String(u"checker"):
648
dbus.String(self.checker_command,
649
variant_level=1),
650
dbus.String(u"checker_running"):
651
dbus.Boolean(self.checker is not None,
652
variant_level=1),
653
dbus.String(u"object_path"):
654
dbus.ObjectPath(self.dbus_object_path,
655
variant_level=1)
656
}, signature=u"sv")
657
658
# IsStillValid - method
659
@dbus.service.method(_interface, out_signature=u"b")
660
def IsStillValid(self):
661
return self.still_valid()
662
663
1193
# PropertyChanged - signal
664
@dbus.service.signal(_interface, signature=u"sv")
1194
@dbus.service.signal(_interface, signature="sv")
665
1195
def PropertyChanged(self, property, value):
666
1196
"D-Bus signal"
667
1197
pass
668
1198
669
# ReceivedSecret - signal
1199
# GotSecret - signal
670
1200
@dbus.service.signal(_interface)
671
def ReceivedSecret(self):
672
"D-Bus signal"
1201
def GotSecret(self):
1202
"""D-Bus signal
1203
Is sent after a successful transfer of secret from the Mandos
1204
server to mandos-client
1205
"""
673
1206
pass
674
1207
675
1208
# Rejected - signal
676
@dbus.service.signal(_interface)
677
def Rejected(self):
678
"D-Bus signal"
679
pass
680
681
# SetChecker - method
682
@dbus.service.method(_interface, in_signature=u"s")
683
def SetChecker(self, checker):
684
"D-Bus setter method"
685
self.checker_command = checker
686
# Emit D-Bus signal
687
self.PropertyChanged(dbus.String(u"checker"),
688
dbus.String(self.checker_command,
689
variant_level=1))
690
691
# SetHost - method
692
@dbus.service.method(_interface, in_signature=u"s")
693
def SetHost(self, host):
694
"D-Bus setter method"
695
self.host = host
696
# Emit D-Bus signal
697
self.PropertyChanged(dbus.String(u"host"),
698
dbus.String(self.host, variant_level=1))
699
700
# SetInterval - method
701
@dbus.service.method(_interface, in_signature=u"t")
702
def SetInterval(self, milliseconds):
703
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
704
# Emit D-Bus signal
705
self.PropertyChanged(dbus.String(u"interval"),
706
(dbus.UInt64(self
707
.interval_milliseconds(),
708
variant_level=1)))
709
710
# SetSecret - method
711
@dbus.service.method(_interface, in_signature=u"ay",
712
byte_arrays=True)
713
def SetSecret(self, secret):
714
"D-Bus setter method"
715
self.secret = str(secret)
716
717
# SetTimeout - method
718
@dbus.service.method(_interface, in_signature=u"t")
719
def SetTimeout(self, milliseconds):
720
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
721
# Emit D-Bus signal
722
self.PropertyChanged(dbus.String(u"timeout"),
723
(dbus.UInt64(self.timeout_milliseconds(),
724
variant_level=1)))
1209
@dbus.service.signal(_interface, signature="s")
1210
def Rejected(self, reason):
1211
"D-Bus signal"
1212
pass
1213
1214
# NeedApproval - signal
1215
@dbus.service.signal(_interface, signature="tb")
1216
def NeedApproval(self, timeout, default):
1217
"D-Bus signal"
1218
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1230
# Approve - method
1231
@dbus.service.method(_interface, in_signature="b")
1232
def Approve(self, value):
1233
self.approve(value)
1234
1235
# CheckedOK - method
1236
@dbus.service.method(_interface)
1237
def CheckedOK(self):
1238
self.checked_ok()
725
1239
726
1240
# Enable - method
727
1241
@dbus.service.method(_interface)
746
1260
def StopChecker(self):
747
1261
self.stop_checker()
748
1262
1263
## Properties
1264
1265
# ApprovalPending - property
1266
@dbus_service_property(_interface, signature="b", access="read")
1267
def ApprovalPending_dbus_property(self):
1268
return dbus.Boolean(bool(self.approvals_pending))
1269
1270
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
1272
access="readwrite")
1273
def ApprovedByDefault_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.Boolean(self.approved_by_default)
1276
self.approved_by_default = bool(value)
1277
1278
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ApprovalDelay_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
1286
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDuration_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
1295
# Name - property
1296
@dbus_service_property(_interface, signature="s", access="read")
1297
def Name_dbus_property(self):
1298
return dbus.String(self.name)
1299
1300
# Fingerprint - property
1301
@dbus_service_property(_interface, signature="s", access="read")
1302
def Fingerprint_dbus_property(self):
1303
return dbus.String(self.fingerprint)
1304
1305
# Host - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def Host_dbus_property(self, value=None):
1309
if value is None: # get
1310
return dbus.String(self.host)
1311
self.host = unicode(value)
1312
1313
# Created - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def Created_dbus_property(self):
1316
return datetime_to_dbus(self.created)
1317
1318
# LastEnabled - property
1319
@dbus_service_property(_interface, signature="s", access="read")
1320
def LastEnabled_dbus_property(self):
1321
return datetime_to_dbus(self.last_enabled)
1322
1323
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
1325
access="readwrite")
1326
def Enabled_dbus_property(self, value=None):
1327
if value is None: # get
1328
return dbus.Boolean(self.enabled)
1329
if value:
1330
self.enable()
1331
else:
1332
self.disable()
1333
1334
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
1336
access="readwrite")
1337
def LastCheckedOK_dbus_property(self, value=None):
1338
if value is not None:
1339
self.checked_ok()
1340
return
1341
return datetime_to_dbus(self.last_checked_ok)
1342
1343
# Expires - property
1344
@dbus_service_property(_interface, signature="s", access="read")
1345
def Expires_dbus_property(self):
1346
return datetime_to_dbus(self.expires)
1347
1348
# LastApprovalRequest - property
1349
@dbus_service_property(_interface, signature="s", access="read")
1350
def LastApprovalRequest_dbus_property(self):
1351
return datetime_to_dbus(self.last_approval_request)
1352
1353
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
1355
access="readwrite")
1356
def Timeout_dbus_property(self, value=None):
1357
if value is None: # get
1358
return dbus.UInt64(self.timeout_milliseconds())
1359
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
1361
return
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
1371
if time_to_die <= 0:
1372
# The timeout has passed
1373
self.disable()
1374
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
1380
1381
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
1383
access="readwrite")
1384
def ExtendedTimeout_dbus_property(self, value=None):
1385
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
1389
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def Interval_dbus_property(self, value=None):
1393
if value is None: # get
1394
return dbus.UInt64(self.interval_milliseconds())
1395
self.interval = datetime.timedelta(0, 0, 0, value)
1396
if getattr(self, "checker_initiator_tag", None) is None:
1397
return
1398
if self.enabled:
1399
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
1405
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
1407
access="readwrite")
1408
def Checker_dbus_property(self, value=None):
1409
if value is None: # get
1410
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
1412
1413
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
1415
access="readwrite")
1416
def CheckerRunning_dbus_property(self, value=None):
1417
if value is None: # get
1418
return dbus.Boolean(self.checker is not None)
1419
if value:
1420
self.start_checker()
1421
else:
1422
self.stop_checker()
1423
1424
# ObjectPath - property
1425
@dbus_service_property(_interface, signature="o", access="read")
1426
def ObjectPath_dbus_property(self):
1427
return self.dbus_object_path # is already a dbus.ObjectPath
1428
1429
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
1432
def Secret_dbus_property(self, value):
1433
self.secret = str(value)
1434
749
1435
del _interface
750
1436
751
1437
1438
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
1440
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
1442
if not self._pipe.recv():
1443
raise KeyError()
1444
1445
def __getattribute__(self, name):
1446
if name == '_pipe':
1447
return super(ProxyClient, self).__getattribute__(name)
1448
self._pipe.send(('getattr', name))
1449
data = self._pipe.recv()
1450
if data[0] == 'data':
1451
return data[1]
1452
if data[0] == 'function':
1453
def func(*args, **kwargs):
1454
self._pipe.send(('funcall', name, args, kwargs))
1455
return self._pipe.recv()[1]
1456
return func
1457
1458
def __setattr__(self, name, value):
1459
if name == '_pipe':
1460
return super(ProxyClient, self).__setattr__(name, value)
1461
self._pipe.send(('setattr', name, value))
1462
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
752
1468
class ClientHandler(socketserver.BaseRequestHandler, object):
753
1469
"""A class to handle client connections.
754
1470
756
1472
Note: This will run in its own forked process."""
757
1473
758
1474
def handle(self):
759
logger.info(u"TCP connection from: %s",
760
unicode(self.client_address))
761
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
762
# Open IPC pipe to parent process
763
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1475
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
1478
logger.debug("Pipe FD: %d",
1479
self.server.child_pipe.fileno())
1480
764
1481
session = (gnutls.connection
765
1482
.ClientSession(self.request,
766
1483
gnutls.connection
767
1484
.X509Credentials()))
768
1485
769
line = self.request.makefile().readline()
770
logger.debug(u"Protocol version: %r", line)
771
try:
772
if int(line.strip().split()[0]) > 1:
773
raise RuntimeError
774
except (ValueError, IndexError, RuntimeError), error:
775
logger.error(u"Unknown protocol version: %s", error)
776
return
777
778
1486
# Note: gnutls.connection.X509Credentials is really a
779
1487
# generic GnuTLS certificate credentials object so long as
780
1488
# no X.509 keys are added to it. Therefore, we can use it
781
1489
# here despite using OpenPGP certificates.
782
1490
783
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
784
# u"+AES-256-CBC", u"+SHA1",
785
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
786
# u"+DHE-DSS"))
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
787
1495
# Use a fallback default, since this MUST be set.
788
1496
priority = self.server.gnutls_priority
789
1497
if priority is None:
790
priority = u"NORMAL"
1498
priority = "NORMAL"
791
1499
(gnutls.library.functions
792
1500
.gnutls_priority_set_direct(session._c_object,
793
1501
priority, None))
794
1502
1503
# Start communication using the Mandos protocol
1504
# Get protocol number
1505
line = self.request.makefile().readline()
1506
logger.debug("Protocol version: %r", line)
1507
try:
1508
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
1510
except (ValueError, IndexError, RuntimeError) as error:
1511
logger.error("Unknown protocol version: %s", error)
1512
return
1513
1514
# Start GnuTLS connection
795
1515
try:
796
1516
session.handshake()
797
except gnutls.errors.GNUTLSError, error:
798
logger.warning(u"Handshake failed: %s", error)
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
799
1519
# Do not run session.bye() here: the session is not
800
1520
# established. Just abandon the request.
801
1521
return
802
logger.debug(u"Handshake succeeded")
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
803
1525
try:
804
fpr = self.fingerprint(self.peer_certificate(session))
805
except (TypeError, gnutls.errors.GNUTLSError), error:
806
logger.warning(u"Bad certificate: %s", error)
807
session.bye()
808
return
809
logger.debug(u"Fingerprint: %s", fpr)
1526
try:
1527
fpr = self.fingerprint(self.peer_certificate
1528
(session))
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
1537
self.client_address)
1538
except KeyError:
1539
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1545
if client.approval_delay:
1546
delay = client.approval_delay
1547
client.approvals_pending += 1
1548
approval_required = True
1549
1550
while True:
1551
if not client.enabled:
1552
logger.info("Client %s is disabled",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Disabled")
1557
return
1558
1559
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
1561
break
1562
elif client.approved is None:
1563
logger.info("Client %s needs approval",
1564
client.name)
1565
if self.server.use_dbus:
1566
# Emit D-Bus signal
1567
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1570
else:
1571
logger.warning("Client %s was not approved",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.Rejected("Denied")
1576
return
1577
1578
#wait until timeout or approved
1579
time = datetime.datetime.now()
1580
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1584
client.changedstate.release()
1585
time2 = datetime.datetime.now()
1586
if (time2 - time) >= delay:
1587
if not client.approved_by_default:
1588
logger.warning("Client %s timed out while"
1589
" waiting for approval",
1590
client.name)
1591
if self.server.use_dbus:
1592
# Emit D-Bus signal
1593
client.Rejected("Approval timed out")
1594
return
1595
else:
1596
break
1597
else:
1598
delay -= time2 - time
1599
1600
sent_size = 0
1601
while sent_size < len(client.secret):
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
1610
sent_size += sent
1611
1612
logger.info("Sending secret to %s", client.name)
1613
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
1615
if self.server.use_dbus:
1616
# Emit D-Bus signal
1617
client.GotSecret()
810
1618
811
for c in self.server.clients:
812
if c.fingerprint == fpr:
813
client = c
814
break
815
else:
816
ipc.write(u"NOTFOUND %s %s\n"
817
% (fpr, unicode(self.client_address)))
818
session.bye()
819
return
820
# Have to check if client.still_valid(), since it is
821
# possible that the client timed out while establishing
822
# the GnuTLS session.
823
if not client.still_valid():
824
ipc.write(u"INVALID %s\n" % client.name)
825
session.bye()
826
return
827
ipc.write(u"SENDING %s\n" % client.name)
828
sent_size = 0
829
while sent_size < len(client.secret):
830
sent = session.send(client.secret[sent_size:])
831
logger.debug(u"Sent: %d, remaining: %d",
832
sent, len(client.secret)
833
- (sent_size + sent))
834
sent_size += sent
835
session.bye()
1619
finally:
1620
if approval_required:
1621
client.approvals_pending -= 1
1622
try:
1623
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
836
1626
837
1627
@staticmethod
838
1628
def peer_certificate(session):
848
1638
.gnutls_certificate_get_peers
849
1639
(session._c_object, ctypes.byref(list_size)))
850
1640
if not bool(cert_list) and list_size.value != 0:
851
raise gnutls.errors.GNUTLSError(u"error getting peer"
852
u" certificate")
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
853
1643
if list_size.value == 0:
854
1644
return None
855
1645
cert = cert_list[0]
881
1671
if crtverify.value != 0:
882
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
883
1673
raise (gnutls.errors.CertificateSecurityError
884
(u"Verify failed"))
1674
("Verify failed"))
885
1675
# New buffer for the fingerprint
886
1676
buf = ctypes.create_string_buffer(20)
887
1677
buf_len = ctypes.c_size_t()
894
1684
# Convert the buffer to a Python bytestring
895
1685
fpr = ctypes.string_at(buf, buf_len.value)
896
1686
# Convert the bytestring to hexadecimal notation
897
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1687
hex_fpr = binascii.hexlify(fpr).upper()
898
1688
return hex_fpr
899
1689
900
1690
901
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
902
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1691
class MultiprocessingMixIn(object):
1692
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
def sub_process_main(self, request, address):
1694
try:
1695
self.finish_request(request, address)
1696
except Exception:
1697
self.handle_error(request, address)
1698
self.close_request(request)
1699
1700
def process_request(self, request, address):
1701
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
1705
proc.start()
1706
return proc
1707
1708
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
""" adds a pipe to the MixIn """
903
1711
def process_request(self, request, client_address):
904
1712
"""Overrides and wraps the original process_request().
905
1713
906
1714
This function creates a new pipe in self.pipe
907
1715
"""
908
self.pipe = os.pipe()
909
super(ForkingMixInWithPipe,
910
self).process_request(request, client_address)
911
os.close(self.pipe[1]) # close write end
912
self.add_pipe(self.pipe[0])
913
def add_pipe(self, pipe):
1716
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
1718
proc = MultiprocessingMixIn.process_request(self, request,
1719
client_address)
1720
self.child_pipe.close()
1721
self.add_pipe(parent_pipe, proc)
1722
1723
def add_pipe(self, parent_pipe, proc):
914
1724
"""Dummy function; override as necessary"""
915
os.close(pipe)
916
917
918
class IPv6_TCPServer(ForkingMixInWithPipe,
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
919
1729
socketserver.TCPServer, object):
920
1730
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
921
1731
937
1747
bind to an address or port if they were not specified."""
938
1748
if self.interface is not None:
939
1749
if SO_BINDTODEVICE is None:
940
logger.error(u"SO_BINDTODEVICE does not exist;"
941
u" cannot bind to interface %s",
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
942
1752
self.interface)
943
1753
else:
944
1754
try:
945
1755
self.socket.setsockopt(socket.SOL_SOCKET,
946
1756
SO_BINDTODEVICE,
947
1757
str(self.interface
948
+ u'\0'))
949
except socket.error, error:
1758
+ '\0'))
1759
except socket.error as error:
950
1760
if error[0] == errno.EPERM:
951
logger.error(u"No permission to"
952
u" bind to interface %s",
1761
logger.error("No permission to"
1762
" bind to interface %s",
953
1763
self.interface)
954
1764
elif error[0] == errno.ENOPROTOOPT:
955
logger.error(u"SO_BINDTODEVICE not available;"
956
u" cannot bind to interface %s",
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
957
1767
self.interface)
958
1768
else:
959
1769
raise
961
1771
if self.server_address[0] or self.server_address[1]:
962
1772
if not self.server_address[0]:
963
1773
if self.address_family == socket.AF_INET6:
964
any_address = u"::" # in6addr_any
1774
any_address = "::" # in6addr_any
965
1775
else:
966
1776
any_address = socket.INADDR_ANY
967
1777
self.server_address = (any_address,
994
1804
self.enabled = False
995
1805
self.clients = clients
996
1806
if self.clients is None:
997
self.clients = set()
1807
self.clients = {}
998
1808
self.use_dbus = use_dbus
999
1809
self.gnutls_priority = gnutls_priority
1000
1810
IPv6_TCPServer.__init__(self, server_address,
1004
1814
def server_activate(self):
1005
1815
if self.enabled:
1006
1816
return socketserver.TCPServer.server_activate(self)
1817
1007
1818
def enable(self):
1008
1819
self.enabled = True
1009
def add_pipe(self, pipe):
1820
1821
def add_pipe(self, parent_pipe, proc):
1010
1822
# Call "handle_ipc" for both data and EOF events
1011
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1012
self.handle_ipc)
1013
def handle_ipc(self, source, condition, file_objects={}):
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1014
1832
condition_names = {
1015
gobject.IO_IN: u"IN", # There is data to read.
1016
gobject.IO_OUT: u"OUT", # Data can be written (without
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1017
1835
# blocking).
1018
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1019
gobject.IO_ERR: u"ERR", # Error condition.
1020
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1021
1839
# broken, usually for pipes and
1022
1840
# sockets).
1023
1841
}
1025
1843
for cond, name in
1026
1844
condition_names.iteritems()
1027
1845
if cond & condition)
1028
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1029
conditions_string)
1030
1031
# Turn the pipe file descriptor into a Python file object
1032
if source not in file_objects:
1033
file_objects[source] = os.fdopen(source, u"r", 1)
1034
1035
# Read a line from the file object
1036
cmdline = file_objects[source].readline()
1037
if not cmdline: # Empty line means end of file
1038
# close the IPC pipe
1039
file_objects[source].close()
1040
del file_objects[source]
1041
1042
# Stop calling this function
1043
return False
1044
1045
logger.debug(u"IPC command: %r", cmdline)
1046
1047
# Parse and act on command
1048
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1049
1050
if cmd == u"NOTFOUND":
1051
logger.warning(u"Client not found for fingerprint: %s",
1052
args)
1053
if self.use_dbus:
1054
# Emit D-Bus signal
1055
mandos_dbus_service.ClientNotFound(args)
1056
elif cmd == u"INVALID":
1057
for client in self.clients:
1058
if client.name == args:
1059
logger.warning(u"Client %s is invalid", args)
1060
if self.use_dbus:
1061
# Emit D-Bus signal
1062
client.Rejected()
1063
break
1064
else:
1065
logger.error(u"Unknown client %s is invalid", args)
1066
elif cmd == u"SENDING":
1067
for client in self.clients:
1068
if client.name == args:
1069
logger.info(u"Sending secret to %s", client.name)
1070
client.checked_ok()
1071
if self.use_dbus:
1072
# Emit D-Bus signal
1073
client.ReceivedSecret()
1074
break
1075
else:
1076
logger.error(u"Sending secret to unknown client %s",
1077
args)
1078
else:
1079
logger.error(u"Unknown IPC command: %r", cmdline)
1080
1081
# Keep calling this function
1846
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1848
# Wait for other process to exit
1849
proc.join()
1850
return False
1851
1852
# Read a request from the child
1853
request = parent_pipe.recv()
1854
command = request[0]
1855
1856
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
1862
client = c
1863
break
1864
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
1867
if self.use_dbus:
1868
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
1870
address[0])
1871
parent_pipe.send(False)
1872
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
1882
parent_pipe.send(True)
1883
# remove the old hook in favor of the new above hook on
1884
# same fileno
1885
return False
1886
if command == 'funcall':
1887
funcname = request[1]
1888
args = request[2]
1889
kwargs = request[3]
1890
1891
parent_pipe.send(('data', getattr(client_object,
1892
funcname)(*args,
1893
**kwargs)))
1894
1895
if command == 'getattr':
1896
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
1899
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
1903
if command == 'setattr':
1904
attrname = request[1]
1905
value = request[2]
1906
setattr(client_object, attrname, value)
1907
1082
1908
return True
1083
1909
1084
1910
1085
1911
def string_to_delta(interval):
1086
1912
"""Parse a string and return a datetime.timedelta
1087
1913
1088
>>> string_to_delta(u'7d')
1914
>>> string_to_delta('7d')
1089
1915
datetime.timedelta(7)
1090
>>> string_to_delta(u'60s')
1916
>>> string_to_delta('60s')
1091
1917
datetime.timedelta(0, 60)
1092
>>> string_to_delta(u'60m')
1918
>>> string_to_delta('60m')
1093
1919
datetime.timedelta(0, 3600)
1094
>>> string_to_delta(u'24h')
1920
>>> string_to_delta('24h')
1095
1921
datetime.timedelta(1)
1096
>>> string_to_delta(u'1w')
1922
>>> string_to_delta('1w')
1097
1923
datetime.timedelta(7)
1098
>>> string_to_delta(u'5m 30s')
1924
>>> string_to_delta('5m 30s')
1099
1925
datetime.timedelta(0, 330)
1100
1926
"""
1101
1927
timevalue = datetime.timedelta(0)
1103
1929
try:
1104
1930
suffix = unicode(s[-1])
1105
1931
value = int(s[:-1])
1106
if suffix == u"d":
1932
if suffix == "d":
1107
1933
delta = datetime.timedelta(value)
1108
elif suffix == u"s":
1934
elif suffix == "s":
1109
1935
delta = datetime.timedelta(0, value)
1110
elif suffix == u"m":
1936
elif suffix == "m":
1111
1937
delta = datetime.timedelta(0, 0, 0, 0, value)
1112
elif suffix == u"h":
1938
elif suffix == "h":
1113
1939
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1114
elif suffix == u"w":
1940
elif suffix == "w":
1115
1941
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1116
1942
else:
1117
raise ValueError
1118
except (ValueError, IndexError):
1119
raise ValueError
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1120
1946
timevalue += delta
1121
1947
return timevalue
1122
1948
1123
1949
1124
def if_nametoindex(interface):
1125
"""Call the C function if_nametoindex(), or equivalent
1126
1127
Note: This function cannot accept a unicode string."""
1128
global if_nametoindex
1129
try:
1130
if_nametoindex = (ctypes.cdll.LoadLibrary
1131
(ctypes.util.find_library(u"c"))
1132
.if_nametoindex)
1133
except (OSError, AttributeError):
1134
logger.warning(u"Doing if_nametoindex the hard way")
1135
def if_nametoindex(interface):
1136
"Get an interface index the hard way, i.e. using fcntl()"
1137
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1138
with closing(socket.socket()) as s:
1139
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1140
struct.pack(str(u"16s16x"),
1141
interface))
1142
interface_index = struct.unpack(str(u"I"),
1143
ifreq[16:20])[0]
1144
return interface_index
1145
return if_nametoindex(interface)
1146
1147
1148
1950
def daemon(nochdir = False, noclose = False):
1149
1951
"""See daemon(3). Standard BSD Unix function.
1150
1952
1153
1955
sys.exit()
1154
1956
os.setsid()
1155
1957
if not nochdir:
1156
os.chdir(u"/")
1958
os.chdir("/")
1157
1959
if os.fork():
1158
1960
sys.exit()
1159
1961
if not noclose:
1161
1963
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1162
1964
if not stat.S_ISCHR(os.fstat(null).st_mode):
1163
1965
raise OSError(errno.ENODEV,
1164
u"/dev/null not a character device")
1966
"%s not a character device"
1967
% os.path.devnull)
1165
1968
os.dup2(null, sys.stdin.fileno())
1166
1969
os.dup2(null, sys.stdout.fileno())
1167
1970
os.dup2(null, sys.stderr.fileno())
1174
1977
##################################################################
1175
1978
# Parsing of options, both command line and config file
1176
1979
1177
parser = optparse.OptionParser(version = "%%prog %s" % version)
1178
parser.add_option("-i", u"--interface", type=u"string",
1179
metavar="IF", help=u"Bind to interface IF")
1180
parser.add_option("-a", u"--address", type=u"string",
1181
help=u"Address to listen for requests on")
1182
parser.add_option("-p", u"--port", type=u"int",
1183
help=u"Port number to receive requests on")
1184
parser.add_option("--check", action=u"store_true",
1185
help=u"Run self-test")
1186
parser.add_option("--debug", action=u"store_true",
1187
help=u"Debug mode; run in foreground and log to"
1188
u" terminal")
1189
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
u" priority string (see GnuTLS documentation)")
1191
parser.add_option("--servicename", type=u"string",
1192
metavar=u"NAME", help=u"Zeroconf service name")
1193
parser.add_option("--configdir", type=u"string",
1194
default=u"/etc/mandos", metavar=u"DIR",
1195
help=u"Directory to search for configuration"
1196
u" files")
1197
parser.add_option("--no-dbus", action=u"store_false",
1198
dest=u"use_dbus", help=u"Do not provide D-Bus"
1199
u" system bus interface")
1200
parser.add_option("--no-ipv6", action=u"store_false",
1201
dest=u"use_ipv6", help=u"Do not use IPv6")
1202
options = parser.parse_args()[0]
1980
parser = argparse.ArgumentParser()
1981
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
1983
help="show version number and exit")
1984
parser.add_argument("-i", "--interface", metavar="IF",
1985
help="Bind to interface IF")
1986
parser.add_argument("-a", "--address",
1987
help="Address to listen for requests on")
1988
parser.add_argument("-p", "--port", type=int,
1989
help="Port number to receive requests on")
1990
parser.add_argument("--check", action="store_true",
1991
help="Run self-test")
1992
parser.add_argument("--debug", action="store_true",
1993
help="Debug mode; run in foreground and log"
1994
" to terminal")
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
help="Debug level for stdout output")
1997
parser.add_argument("--priority", help="GnuTLS"
1998
" priority string (see GnuTLS documentation)")
1999
parser.add_argument("--servicename",
2000
metavar="NAME", help="Zeroconf service name")
2001
parser.add_argument("--configdir",
2002
default="/etc/mandos", metavar="DIR",
2003
help="Directory to search for configuration"
2004
" files")
2005
parser.add_argument("--no-dbus", action="store_false",
2006
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2008
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2010
parser.add_argument("--no-restore", action="store_false",
2011
dest="restore", help="Do not restore stored"
2012
" state")
2013
parser.add_argument("--statedir", metavar="DIR",
2014
help="Directory to save/restore state in")
2015
2016
options = parser.parse_args()
1203
2017
1204
2018
if options.check:
1205
2019
import doctest
1207
2021
sys.exit()
1208
2022
1209
2023
# Default values for config file for server-global settings
1210
server_defaults = { u"interface": u"",
1211
u"address": u"",
1212
u"port": u"",
1213
u"debug": u"False",
1214
u"priority":
1215
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1216
u"servicename": u"Mandos",
1217
u"use_dbus": u"True",
1218
u"use_ipv6": u"True",
2024
server_defaults = { "interface": "",
2025
"address": "",
2026
"port": "",
2027
"debug": "False",
2028
"priority":
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
1219
2036
}
1220
2037
1221
2038
# Parse config file for server-global settings
1222
2039
server_config = configparser.SafeConfigParser(server_defaults)
1223
2040
del server_defaults
1224
2041
server_config.read(os.path.join(options.configdir,
1225
u"mandos.conf"))
2042
"mandos.conf"))
1226
2043
# Convert the SafeConfigParser object to a dict
1227
2044
server_settings = server_config.defaults()
1228
2045
# Use the appropriate methods on the non-string config options
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
1231
2048
option)
1232
2049
if server_settings["port"]:
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
1235
2052
del server_config
1236
2053
1237
2054
# Override the settings from the config file with command line
1238
2055
# options, if set.
1239
for option in (u"interface", u"address", u"port", u"debug",
1240
u"priority", u"servicename", u"configdir",
1241
u"use_dbus", u"use_ipv6"):
2056
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
1242
2060
value = getattr(options, option)
1243
2061
if value is not None:
1244
2062
server_settings[option] = value
1252
2070
##################################################################
1253
2071
1254
2072
# For convenience
1255
debug = server_settings[u"debug"]
1256
use_dbus = server_settings[u"use_dbus"]
1257
use_ipv6 = server_settings[u"use_ipv6"]
1258
1259
if not debug:
1260
syslogger.setLevel(logging.WARNING)
1261
console.setLevel(logging.WARNING)
1262
1263
if server_settings[u"servicename"] != u"Mandos":
2073
debug = server_settings["debug"]
2074
debuglevel = server_settings["debuglevel"]
2075
use_dbus = server_settings["use_dbus"]
2076
use_ipv6 = server_settings["use_ipv6"]
2077
stored_state_path = os.path.join(server_settings["statedir"],
2078
stored_state_file)
2079
2080
if debug:
2081
initlogger(logging.DEBUG)
2082
else:
2083
if not debuglevel:
2084
initlogger()
2085
else:
2086
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
2088
2089
if server_settings["servicename"] != "Mandos":
1264
2090
syslogger.setFormatter(logging.Formatter
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
1268
2094
1269
2095
# Parse config file with clients
1270
client_defaults = { u"timeout": u"1h",
1271
u"interval": u"5m",
1272
u"checker": u"fping -q -- %%(host)s",
1273
u"host": u"",
1274
}
1275
client_config = configparser.SafeConfigParser(client_defaults)
1276
client_config.read(os.path.join(server_settings[u"configdir"],
1277
u"clients.conf"))
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2097
client_config.read(os.path.join(server_settings["configdir"],
2098
"clients.conf"))
1278
2099
1279
2100
global mandos_dbus_service
1280
2101
mandos_dbus_service = None
1281
2102
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
1284
2105
ClientHandler,
1285
interface=server_settings[u"interface"],
2106
interface=(server_settings["interface"]
2107
or None),
1286
2108
use_ipv6=use_ipv6,
1287
2109
gnutls_priority=
1288
server_settings[u"priority"],
2110
server_settings["priority"],
1289
2111
use_dbus=use_dbus)
1290
pidfilename = u"/var/run/mandos.pid"
1291
try:
1292
pidfile = open(pidfilename, u"w")
1293
except IOError:
1294
logger.error(u"Could not open file %r", pidfilename)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
1295
2118
1296
2119
try:
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
1299
2122
except KeyError:
1300
2123
try:
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
1303
2126
except KeyError:
1304
2127
try:
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
1307
2130
except KeyError:
1308
2131
uid = 65534
1309
2132
gid = 65534
1310
2133
try:
1311
2134
os.setgid(gid)
1312
2135
os.setuid(uid)
1313
except OSError, error:
2136
except OSError as error:
1314
2137
if error[0] != errno.EPERM:
1315
2138
raise error
1316
2139
1317
# Enable all possible GnuTLS debugging
1318
2140
if debug:
2141
# Enable all possible GnuTLS debugging
2142
1319
2143
# "Use a log level over 10 to enable all debugging options."
1320
2144
# - GnuTLS manual
1321
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
1322
2146
1323
2147
@gnutls.library.types.gnutls_log_func
1324
2148
def debug_gnutls(level, string):
1325
logger.debug(u"GnuTLS: %s", string[:-1])
2149
logger.debug("GnuTLS: %s", string[:-1])
1326
2150
1327
2151
(gnutls.library.functions
1328
2152
.gnutls_global_set_log_function(debug_gnutls))
2153
2154
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2156
os.dup2(null, sys.stdin.fileno())
2157
if null > 2:
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
2163
# Need to fork before connecting to D-Bus
2164
if not debug:
2165
# Close all input and output, do double fork, etc.
2166
daemon()
1329
2167
1330
2168
global main_loop
1331
2169
# From the Avahi example code
1334
2172
bus = dbus.SystemBus()
1335
2173
# End of Avahi example code
1336
2174
if use_dbus:
1337
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2175
try:
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
2183
use_dbus = False
2184
server_settings["use_dbus"] = False
2185
tcp_server.use_dbus = False
1338
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1342
2191
if server_settings["interface"]:
1343
2192
service.interface = (if_nametoindex
1344
(str(server_settings[u"interface"])))
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1345
2197
1346
2198
client_class = Client
1347
2199
if use_dbus:
1348
client_class = functools.partial(ClientDBus, bus = bus)
1349
tcp_server.clients.update(set(
1350
client_class(name = section,
1351
config= dict(client_config.items(section)))
1352
for section in client_config.sections()))
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
2220
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
2222
# Decide which value to use after restoring saved state.
2223
# We have three different values: Old config file,
2224
# new config file, and saved state.
2225
# New config value takes precedence if it differs from old
2226
# config value, otherwise use saved state.
2227
for name, value in client_settings[client_name].items():
2228
try:
2229
# For each value in new config, check if it
2230
# differs from the old config value (Except for
2231
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
2234
[name]):
2235
client[name] = value
2236
except KeyError:
2237
pass
2238
2239
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
2243
if client["enabled"]:
2244
if datetime.datetime.utcnow() >= client["expires"]:
2245
if not client["last_checked_ok"]:
2246
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
2250
client["enabled"] = False
2251
elif client["last_checker_status"] != 0:
2252
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
2257
client["enabled"] = False
2258
else:
2259
client["expires"] = (datetime.datetime
2260
.utcnow()
2261
+ client["timeout"])
2262
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
2278
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
2280
clients_data[client_name] = client_settings[client_name]
2281
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
2284
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
2286
1353
2287
if not tcp_server.clients:
1354
logger.warning(u"No clients defined")
1355
1356
if debug:
1357
# Redirect stdin so all checkers get /dev/null
1358
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1359
os.dup2(null, sys.stdin.fileno())
1360
if null > 2:
1361
os.close(null)
1362
else:
1363
# No console logging
1364
logger.removeHandler(console)
1365
# Close all input and output, do double fork, etc.
1366
daemon()
1367
1368
try:
1369
with closing(pidfile):
1370
pid = os.getpid()
1371
pidfile.write(str(pid) + "\n")
1372
del pidfile
1373
except IOError:
1374
logger.error(u"Could not write to file %r with PID %d",
1375
pidfilename, pid)
1376
except NameError:
1377
# "pidfile" was never created
1378
pass
1379
del pidfilename
1380
1381
def cleanup():
1382
"Cleanup function; run on exit"
1383
service.cleanup()
2288
logger.warning("No clients defined")
1384
2289
1385
while tcp_server.clients:
1386
client = tcp_server.clients.pop()
1387
client.disable_hook = None
1388
client.disable()
1389
1390
atexit.register(cleanup)
1391
1392
2290
if not debug:
2291
try:
2292
with pidfile:
2293
pid = os.getpid()
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2295
del pidfile
2296
except IOError:
2297
logger.error("Could not write to file %r with PID %d",
2298
pidfilename, pid)
2299
except NameError:
2300
# "pidfile" was never created
2301
pass
2302
del pidfilename
1393
2303
signal.signal(signal.SIGINT, signal.SIG_IGN)
2304
1394
2305
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1395
2306
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1396
2307
1398
2309
class MandosDBusService(dbus.service.Object):
1399
2310
"""A D-Bus proxy object"""
1400
2311
def __init__(self):
1401
dbus.service.Object.__init__(self, bus, u"/")
1402
_interface = u"se.bsnet.fukt.Mandos"
1403
1404
@dbus.service.signal(_interface, signature=u"oa{sv}")
1405
def ClientAdded(self, objpath, properties):
1406
"D-Bus signal"
1407
pass
1408
1409
@dbus.service.signal(_interface, signature=u"s")
1410
def ClientNotFound(self, fingerprint):
1411
"D-Bus signal"
1412
pass
1413
1414
@dbus.service.signal(_interface, signature=u"os")
2312
dbus.service.Object.__init__(self, bus, "/")
2313
_interface = "se.recompile.Mandos"
2314
2315
@dbus.service.signal(_interface, signature="o")
2316
def ClientAdded(self, objpath):
2317
"D-Bus signal"
2318
pass
2319
2320
@dbus.service.signal(_interface, signature="ss")
2321
def ClientNotFound(self, fingerprint, address):
2322
"D-Bus signal"
2323
pass
2324
2325
@dbus.service.signal(_interface, signature="os")
1415
2326
def ClientRemoved(self, objpath, name):
1416
2327
"D-Bus signal"
1417
2328
pass
1418
2329
1419
@dbus.service.method(_interface, out_signature=u"ao")
2330
@dbus.service.method(_interface, out_signature="ao")
1420
2331
def GetAllClients(self):
1421
2332
"D-Bus method"
1422
2333
return dbus.Array(c.dbus_object_path
1423
for c in tcp_server.clients)
2334
for c in
2335
tcp_server.clients.itervalues())
1424
2336
1425
2337
@dbus.service.method(_interface,
1426
out_signature=u"a{oa{sv}}")
2338
out_signature="a{oa{sv}}")
1427
2339
def GetAllClientsWithProperties(self):
1428
2340
"D-Bus method"
1429
2341
return dbus.Dictionary(
1430
((c.dbus_object_path, c.GetAllProperties())
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
2344
signature="oa{sv}")
1433
2345
1434
@dbus.service.method(_interface, in_signature=u"o")
2346
@dbus.service.method(_interface, in_signature="o")
1435
2347
def RemoveClient(self, object_path):
1436
2348
"D-Bus method"
1437
for c in tcp_server.clients:
2349
for c in tcp_server.clients.itervalues():
1438
2350
if c.dbus_object_path == object_path:
1439
tcp_server.clients.remove(c)
2351
del tcp_server.clients[c.name]
1440
2352
c.remove_from_connection()
1441
2353
# Don't signal anything except ClientRemoved
1442
c.disable(signal=False)
2354
c.disable(quiet=True)
1443
2355
# Emit D-Bus signal
1444
2356
self.ClientRemoved(object_path, c.name)
1445
2357
return
1446
raise KeyError
2358
raise KeyError(object_path)
1447
2359
1448
2360
del _interface
1449
2361
1450
mandos_dbus_service = MandosDBusService()
1451
1452
for client in tcp_server.clients:
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
2365
2366
def cleanup():
2367
"Cleanup function; run on exit"
2368
service.cleanup()
2369
2370
multiprocessing.active_children()
2371
if not (tcp_server.clients or client_settings):
2372
return
2373
2374
# Store client before exiting. Secrets are encrypted with key
2375
# based on what config file has. If config file is
2376
# removed/edited, old secret will thus be unrecovable.
2377
clients = {}
2378
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
2380
key = client_settings[client.name]["secret"]
2381
client.encrypted_secret = pgp.encrypt(client.secret,
2382
key)
2383
client_dict = {}
2384
2385
# A list of attributes that can not be pickled
2386
# + secret.
2387
exclude = set(("bus", "changedstate", "secret",
2388
"checker"))
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
2391
exclude.add(name)
2392
2393
client_dict["encrypted_secret"] = (client
2394
.encrypted_secret)
2395
for attr in client.client_structure:
2396
if attr not in exclude:
2397
client_dict[attr] = getattr(client, attr)
2398
2399
clients[client.name] = client_dict
2400
del client_settings[client.name]["secret"]
2401
2402
try:
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
2407
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2409
.format(e))
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
2411
raise
2412
2413
# Delete all clients, and settings from config
2414
while tcp_server.clients:
2415
name, client = tcp_server.clients.popitem()
2416
if use_dbus:
2417
client.remove_from_connection()
2418
# Don't signal anything except ClientRemoved
2419
client.disable(quiet=True)
2420
if use_dbus:
2421
# Emit D-Bus signal
2422
mandos_dbus_service.ClientRemoved(client
2423
.dbus_object_path,
2424
client.name)
2425
client_settings.clear()
2426
2427
atexit.register(cleanup)
2428
2429
for client in tcp_server.clients.itervalues():
1453
2430
if use_dbus:
1454
2431
# Emit D-Bus signal
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
1457
client.enable()
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2433
# Need to initiate checking of clients
2434
if client.enabled:
2435
client.init_checker()
1458
2436
1459
2437
tcp_server.enable()
1460
2438
tcp_server.server_activate()
1462
2440
# Find out what port we got
1463
2441
service.port = tcp_server.socket.getsockname()[1]
1464
2442
if use_ipv6:
1465
logger.info(u"Now listening on address %r, port %d,"
2443
logger.info("Now listening on address %r, port %d,"
1466
2444
" flowinfo %d, scope_id %d"
1467
2445
% tcp_server.socket.getsockname())
1468
2446
else: # IPv4
1469
logger.info(u"Now listening on address %r, port %d"
2447
logger.info("Now listening on address %r, port %d"
1470
2448
% tcp_server.socket.getsockname())
1471
2449
1472
2450
#service.interface = tcp_server.socket.getsockname()[3]
1475
2453
# From the Avahi example code
1476
2454
try:
1477
2455
service.activate()
1478
except dbus.exceptions.DBusException, error:
1479
logger.critical(u"DBusException: %s", error)
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2458
cleanup()
1480
2459
sys.exit(1)
1481
2460
# End of Avahi example code
1482
2461
1485
2464
(tcp_server.handle_request
1486
2465
(*args[2:], **kwargs) or True))
1487
2466
1488
logger.debug(u"Starting main loop")
2467
logger.debug("Starting main loop")
1489
2468
main_loop.run()
1490
except AvahiError, error:
1491
logger.critical(u"AvahiError: %s", error)
2469
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
2471
cleanup()
1492
2472
sys.exit(1)
1493
2473
except KeyboardInterrupt:
1494
2474
if debug:
1495
print >> sys.stderr
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
2475
print("", file=sys.stderr)
2476
logger.debug("Server received KeyboardInterrupt")
2477
logger.debug("Server exiting")
2478
# Must run before the D-Bus bus name gets deregistered
2479
cleanup()
1498
2480
1499
2481
if __name__ == '__main__':
1500
2482
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0