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- Committer: Teddy Hogeborn
- Date: 2009-04-17 01:16:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20090417011637-bcqjpm7fskm4370v
Code cleanup and one bug fix.
* mandos (Client.enable): Bug fix: Do not enable if already enabled.
(MandosServer.__init__): Create empty set of clients if none passed.
(main): Do not create clients set; do not pass a clients set to
MandosServer. Use tcp_server.clients throughout.
* mandos (Client.enable): Bug fix: Do not enable if already enabled.
(MandosServer.__init__): Create empty set of clients if none passed.
(main): Do not create clients set; do not pass a clients set to
MandosServer. Use tcp_server.clients throughout.
- files removed:
- 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
36
import SocketServer as socketserver
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
import contextlib
58
from contextlib import closing
60
59
import struct
61
60
import fcntl
62
61
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
68
62
69
63
import dbus
70
64
import dbus.service
73
67
from dbus.mainloop.glib import DBusGMainLoop
74
68
import ctypes
75
69
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
70
80
71
try:
81
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
76
except ImportError:
86
77
SO_BINDTODEVICE = None
87
78
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
92
83
syslogger = (logging.handlers.SysLogHandler
93
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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
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)
209
96
210
97
class AvahiError(Exception):
211
98
def __init__(self, value, *args, **kwargs):
227
114
Attributes:
228
115
interface: integer; avahi.IF_UNSPEC or an interface index.
229
116
Used to optionally bind to the specified interface.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
232
119
See <http://www.dns-sd.org/ServiceTypes.html>
233
120
port: integer; what port to announce
234
121
TXT: list of strings; TXT record for the service
243
130
"""
244
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
132
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
133
domain = u"", host = u"", max_renames = 32768,
247
134
protocol = avahi.PROTO_UNSPEC, bus = None):
248
135
self.interface = interface
249
136
self.name = name
258
145
self.group = None # our entry group
259
146
self.server = None
260
147
self.bus = bus
261
self.entry_group_state_changed_match = None
262
148
def rename(self):
263
149
"""Derived from the Avahi example code"""
264
150
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
267
153
self.rename_count)
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)
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))
273
162
self.remove()
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)
163
self.add()
280
164
self.rename_count += 1
281
165
def remove(self):
282
166
"""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
286
167
if self.group is not None:
287
168
self.group.Reset()
288
169
def add(self):
289
170
"""Derived from the Avahi example code"""
290
self.remove()
291
171
if self.group is None:
292
172
self.group = dbus.Interface(
293
173
self.bus.get_object(avahi.DBUS_NAME,
294
174
self.server.EntryGroupNew()),
295
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
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' ...",
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
300
179
self.name, self.type)
301
180
self.group.AddService(
302
181
self.interface,
309
188
self.group.Commit()
310
189
def entry_group_state_changed(self, state, error):
311
190
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
191
logger.debug(u"Avahi state change: %i", state)
313
192
314
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
194
logger.debug(u"Zeroconf service established.")
316
195
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
196
logger.warning(u"Zeroconf service name collision.")
318
197
self.rename()
319
198
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
199
logger.critical(u"Avahi: Error in group state changed %s",
321
200
unicode(error))
322
raise AvahiGroupError("State changed: %s"
201
raise AvahiGroupError(u"State changed: %s"
323
202
% unicode(error))
324
203
def cleanup(self):
325
204
"""Derived from the Avahi example code"""
326
205
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
206
self.group.Free()
332
207
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
208
def server_state_changed(self, state):
335
209
"""Derived from the Avahi example code"""
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()
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
351
213
elif state == avahi.SERVER_RUNNING:
352
214
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)
358
215
def activate(self):
359
216
"""Derived from the Avahi example code"""
360
217
if self.server is None:
361
218
self.server = dbus.Interface(
362
219
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
220
avahi.DBUS_PATH_SERVER),
365
221
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
222
self.server.connect_to_signal(u"StateChanged",
367
223
self.server_state_changed)
368
224
self.server_state_changed(self.server.GetState())
369
225
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
379
226
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
386
227
class Client(object):
387
228
"""A representation of a client host served by this server.
388
229
389
230
Attributes:
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
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
393
245
checker: subprocess.Popen(); a running checker process used
394
246
to see if the client lives.
395
247
'None' if no process is running.
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
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
399
253
runtime with vars(self) as dict, so that for
400
254
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
405
255
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
427
256
"""
428
257
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
}
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
443
264
444
265
def timeout_milliseconds(self):
445
266
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
267
return self._datetime_to_milliseconds(self.timeout)
451
268
452
269
def interval_milliseconds(self):
453
270
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
271
return self._datetime_to_milliseconds(self.interval)
455
272
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):
273
def __init__(self, name = None, disable_hook=None, config=None):
511
274
"""Note: the 'checker' key in 'config' sets the
512
275
'checker_command' attribute and *not* the 'checker'
513
276
attribute."""
514
277
self.name = 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)
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
520
281
# Uppercase and remove spaces from fingerprint for later
521
282
# comparison purposes with return value from the fingerprint()
522
283
# function
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# attributes specific for this server instance
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
294
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
527
305
self.checker = None
528
306
self.checker_initiator_tag = None
529
307
self.disable_initiator_tag = None
530
308
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
531
310
self.current_checker_command = 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()
311
self.last_connect = None
553
312
554
313
def enable(self):
555
314
"""Start this client's checker and timeout hooks"""
556
if getattr(self, "enabled", False):
315
if getattr(self, u"enabled", False):
557
316
# Already enabled
558
317
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
562
318
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):
589
319
# Schedule a new checker to be started an 'interval' from now,
590
320
# and every interval from then on.
591
321
self.checker_initiator_tag = (gobject.timeout_add
592
322
(self.interval_milliseconds(),
593
323
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
594
326
# Schedule a disable() when 'timeout' has passed
595
327
self.disable_initiator_tag = (gobject.timeout_add
596
328
(self.timeout_milliseconds(),
597
329
self.disable))
598
# Also start a new checker *right now*.
599
self.start_checker()
330
self.enabled = True
331
332
def disable(self):
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
335
return False
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
343
self.stop_checker()
344
if self.disable_hook:
345
self.disable_hook(self)
346
self.enabled = False
347
# Do not run this again if called by a gobject.timeout_add
348
return False
349
350
def __del__(self):
351
self.disable_hook = None
352
self.disable()
600
353
601
354
def checker_callback(self, pid, condition, command):
602
355
"""The checker has completed, so take appropriate actions."""
603
356
self.checker_callback_tag = None
604
357
self.checker = None
605
358
if os.WIFEXITED(condition):
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
359
exitstatus = os.WEXITSTATUS(condition)
360
if exitstatus == 0:
361
logger.info(u"Checker for %(name)s succeeded",
609
362
vars(self))
610
363
self.checked_ok()
611
364
else:
612
logger.info("Checker for %(name)s failed",
365
logger.info(u"Checker for %(name)s failed",
613
366
vars(self))
614
367
else:
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
368
logger.warning(u"Checker for %(name)s crashed?",
617
369
vars(self))
618
370
619
def checked_ok(self, timeout=None):
371
def checked_ok(self):
620
372
"""Bump up the timeout for this client.
621
373
622
374
This should only be called when the client has been seen,
623
375
alive and well.
624
376
"""
625
if timeout is None:
626
timeout = self.timeout
627
377
self.last_checked_ok = datetime.datetime.utcnow()
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()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
381
self.disable))
638
382
639
383
def start_checker(self):
640
384
"""Start a new checker subprocess if one is not running.
647
391
# client would inevitably timeout, since no checker would get
648
392
# a chance to run to completion. If we instead leave running
649
393
# checkers alone, the checker would have to take more time
650
# than 'timeout' for the client to be disabled, which is as it
651
# should be.
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
652
396
653
397
# If a checker exists, make sure it is not a zombie
654
try:
398
if self.checker is not None:
655
399
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:
661
400
if pid:
662
logger.warning("Checker was a zombie")
401
logger.warning(u"Checker was a zombie")
663
402
gobject.source_remove(self.checker_callback_tag)
664
403
self.checker_callback(pid, status,
665
404
self.current_checker_command)
670
409
command = self.checker_command % self.host
671
410
except TypeError:
672
411
# Escape attributes for the shell
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
416
for key, val in
417
vars(self).iteritems())
681
418
try:
682
419
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
686
423
return True # Try again later
687
424
self.current_checker_command = command
688
425
try:
689
logger.info("Starting checker %r for %s",
426
logger.info(u"Starting checker %r for %s",
690
427
command, self.name)
691
428
# We don't need to redirect stdout and stderr, since
692
429
# in normal mode, that is already done by daemon(),
694
431
# always replaced by /dev/null.)
695
432
self.checker = subprocess.Popen(command,
696
433
close_fds=True,
697
shell=True, cwd="/")
434
shell=True, cwd=u"/")
698
435
self.checker_callback_tag = (gobject.child_watch_add
699
436
(self.checker.pid,
700
437
self.checker_callback,
705
442
if pid:
706
443
gobject.source_remove(self.checker_callback_tag)
707
444
self.checker_callback(pid, status, command)
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
710
447
error)
711
448
# Re-run this periodically if run by gobject.timeout_add
712
449
return True
716
453
if self.checker_callback_tag:
717
454
gobject.source_remove(self.checker_callback_tag)
718
455
self.checker_callback_tag = None
719
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
720
457
return
721
logger.debug("Stopping checker for %(name)s", vars(self))
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
459
try:
723
460
os.kill(self.checker.pid, signal.SIGTERM)
724
#time.sleep(0.5)
461
#os.sleep(0.5)
725
462
#if self.checker.poll() is None:
726
463
# os.kill(self.checker.pid, signal.SIGKILL)
727
except OSError as error:
464
except OSError, error:
728
465
if error.errno != errno.ESRCH: # No such process
729
466
raise
730
467
self.checker = None
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):
468
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
472
return False
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
476
else:
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
1027
481
"""A Client class using D-Bus
1028
482
1029
483
Attributes:
1030
484
dbus_object_path: dbus.ObjectPath
1031
485
bus: dbus.SystemBus()
1032
486
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
1037
487
# dbus.service.Object doesn't use super(), so we can't either.
1038
488
1039
489
def __init__(self, bus = None, *args, **kwargs):
1040
490
self.bus = bus
1041
491
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
1045
492
# Only now, when this client is initialized, can it show up on
1046
493
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
1050
494
self.dbus_object_path = (dbus.ObjectPath
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
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
1121
527
1122
528
def __del__(self, *args, **kwargs):
1123
529
try:
1124
530
self.remove_from_connection()
1125
531
except LookupError:
1126
532
pass
1127
if hasattr(DBusObjectWithProperties, "__del__"):
1128
DBusObjectWithProperties.__del__(self, *args, **kwargs)
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1129
535
Client.__del__(self, *args, **kwargs)
1130
536
1131
537
def checker_callback(self, pid, condition, command,
1132
538
*args, **kwargs):
1133
539
self.checker_callback_tag = None
1134
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
1135
544
if os.WIFEXITED(condition):
1136
545
exitstatus = os.WEXITSTATUS(condition)
1137
546
# Emit D-Bus signal
1147
556
return Client.checker_callback(self, pid, condition, command,
1148
557
*args, **kwargs)
1149
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
1150
568
def start_checker(self, *args, **kwargs):
1151
569
old_checker = self.checker
1152
570
if self.checker is not None:
1159
577
and old_checker_pid != self.checker.pid):
1160
578
# Emit D-Bus signal
1161
579
self.CheckerStarted(self.current_checker_command)
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
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
593
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
596
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
1180
601
1181
602
# CheckerCompleted - signal
1182
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
1183
604
def CheckerCompleted(self, exitcode, waitstatus, command):
1184
605
"D-Bus signal"
1185
606
pass
1186
607
1187
608
# CheckerStarted - signal
1188
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
1189
610
def CheckerStarted(self, command):
1190
611
"D-Bus signal"
1191
612
pass
1192
613
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
617
"D-Bus method"
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
642
variant_level=1),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
645
variant_level=1),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
648
variant_level=1),
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
651
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
656
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
661
1193
662
# PropertyChanged - signal
1194
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
1195
664
def PropertyChanged(self, property, value):
1196
665
"D-Bus signal"
1197
666
pass
1198
667
1199
# GotSecret - signal
668
# ReceivedSecret - signal
1200
669
@dbus.service.signal(_interface)
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
"""
670
def ReceivedSecret(self):
671
"D-Bus signal"
1206
672
pass
1207
673
1208
674
# Rejected - signal
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()
675
@dbus.service.signal(_interface)
676
def Rejected(self):
677
"D-Bus signal"
678
pass
679
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
685
# Emit D-Bus signal
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
688
variant_level=1))
689
690
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
694
self.host = host
695
# Emit D-Bus signal
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
698
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
# Emit D-Bus signal
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
706
variant_level=1)))
707
708
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
710
byte_arrays=True)
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
714
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
# Emit D-Bus signal
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
722
variant_level=1)))
1239
723
1240
724
# Enable - method
1241
725
@dbus.service.method(_interface)
1260
744
def StopChecker(self):
1261
745
self.stop_checker()
1262
746
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
1435
747
del _interface
1436
748
1437
749
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
1468
750
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
751
"""A class to handle client connections.
1470
752
1472
754
Note: This will run in its own forked process."""
1473
755
1474
756
def handle(self):
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
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1481
762
session = (gnutls.connection
1482
763
.ClientSession(self.request,
1483
764
gnutls.connection
1484
765
.X509Credentials()))
1485
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
1486
776
# Note: gnutls.connection.X509Credentials is really a
1487
777
# generic GnuTLS certificate credentials object so long as
1488
778
# no X.509 keys are added to it. Therefore, we can use it
1489
779
# here despite using OpenPGP certificates.
1490
780
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
1495
785
# Use a fallback default, since this MUST be set.
1496
786
priority = self.server.gnutls_priority
1497
787
if priority is None:
1498
priority = "NORMAL"
788
priority = u"NORMAL"
1499
789
(gnutls.library.functions
1500
790
.gnutls_priority_set_direct(session._c_object,
1501
791
priority, None))
1502
792
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
1515
793
try:
1516
794
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1519
797
# Do not run session.bye() here: the session is not
1520
798
# established. Just abandon the request.
1521
799
return
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
800
logger.debug(u"Handshake succeeded")
1525
801
try:
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()
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
1618
808
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")
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s\n" % fpr)
815
session.bye()
816
return
817
# Have to check if client.still_valid(), since it is
818
# possible that the client timed out while establishing
819
# the GnuTLS session.
820
if not client.still_valid():
821
ipc.write(u"INVALID %s\n" % client.name)
822
session.bye()
823
return
824
ipc.write(u"SENDING %s\n" % client.name)
825
sent_size = 0
826
while sent_size < len(client.secret):
827
sent = session.send(client.secret[sent_size:])
828
logger.debug(u"Sent: %d, remaining: %d",
829
sent, len(client.secret)
830
- (sent_size + sent))
831
sent_size += sent
832
session.bye()
1626
833
1627
834
@staticmethod
1628
835
def peer_certificate(session):
1638
845
.gnutls_certificate_get_peers
1639
846
(session._c_object, ctypes.byref(list_size)))
1640
847
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
848
raise gnutls.errors.GNUTLSError(u"error getting peer"
849
u" certificate")
1643
850
if list_size.value == 0:
1644
851
return None
1645
852
cert = cert_list[0]
1671
878
if crtverify.value != 0:
1672
879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
880
raise (gnutls.errors.CertificateSecurityError
1674
("Verify failed"))
881
(u"Verify failed"))
1675
882
# New buffer for the fingerprint
1676
883
buf = ctypes.create_string_buffer(20)
1677
884
buf_len = ctypes.c_size_t()
1684
891
# Convert the buffer to a Python bytestring
1685
892
fpr = ctypes.string_at(buf, buf_len.value)
1686
893
# Convert the bytestring to hexadecimal notation
1687
hex_fpr = binascii.hexlify(fpr).upper()
894
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1688
895
return hex_fpr
1689
896
1690
897
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 """
898
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
899
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1711
900
def process_request(self, request, client_address):
1712
901
"""Overrides and wraps the original process_request().
1713
902
1714
This function creates a new pipe in self.pipe
903
This function creates a new pipe in self.pipe
1715
904
"""
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):
905
self.pipe = os.pipe()
906
super(ForkingMixInWithPipe,
907
self).process_request(request, client_address)
908
os.close(self.pipe[1]) # close write end
909
self.add_pipe(self.pipe[0])
910
def add_pipe(self, pipe):
1724
911
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
912
os.close(pipe)
913
914
915
class IPv6_TCPServer(ForkingMixInWithPipe,
1729
916
socketserver.TCPServer, object):
1730
917
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1731
918
1747
934
bind to an address or port if they were not specified."""
1748
935
if self.interface is not None:
1749
936
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
937
logger.error(u"SO_BINDTODEVICE does not exist;"
938
u" cannot bind to interface %s",
1752
939
self.interface)
1753
940
else:
1754
941
try:
1755
942
self.socket.setsockopt(socket.SOL_SOCKET,
1756
943
SO_BINDTODEVICE,
1757
944
str(self.interface
1758
+ '\0'))
1759
except socket.error as error:
945
+ u'\0'))
946
except socket.error, error:
1760
947
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
948
logger.error(u"No permission to"
949
u" bind to interface %s",
1763
950
self.interface)
1764
951
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
952
logger.error(u"SO_BINDTODEVICE not available;"
953
u" cannot bind to interface %s",
1767
954
self.interface)
1768
955
else:
1769
956
raise
1771
958
if self.server_address[0] or self.server_address[1]:
1772
959
if not self.server_address[0]:
1773
960
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
961
any_address = u"::" # in6addr_any
1775
962
else:
1776
963
any_address = socket.INADDR_ANY
1777
964
self.server_address = (any_address,
1795
982
clients: set of Client objects
1796
983
gnutls_priority GnuTLS priority string
1797
984
use_dbus: Boolean; to emit D-Bus signals or not
985
clients: set of Client objects
986
gnutls_priority GnuTLS priority string
987
use_dbus: Boolean; to emit D-Bus signals or not
1798
988
1799
989
Assumes a gobject.MainLoop event loop.
1800
990
"""
1804
994
self.enabled = False
1805
995
self.clients = clients
1806
996
if self.clients is None:
1807
self.clients = {}
997
self.clients = set()
1808
998
self.use_dbus = use_dbus
1809
999
self.gnutls_priority = gnutls_priority
1810
1000
IPv6_TCPServer.__init__(self, server_address,
1814
1004
def server_activate(self):
1815
1005
if self.enabled:
1816
1006
return socketserver.TCPServer.server_activate(self)
1817
1818
1007
def enable(self):
1819
1008
self.enabled = True
1820
1821
def add_pipe(self, parent_pipe, proc):
1009
def add_pipe(self, pipe):
1822
1010
# Call "handle_ipc" for both data and EOF events
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):
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={}):
1832
1014
condition_names = {
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1015
gobject.IO_IN: u"IN", # There is data to read.
1016
gobject.IO_OUT: u"OUT", # Data can be written (without
1835
1017
# blocking).
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
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
1839
1021
# broken, usually for pipes and
1840
1022
# sockets).
1841
1023
}
1843
1025
for cond, name in
1844
1026
condition_names.iteritems()
1845
1027
if cond & condition)
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
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
1908
1082
return True
1909
1083
1910
1084
1911
1085
def string_to_delta(interval):
1912
1086
"""Parse a string and return a datetime.timedelta
1913
1087
1914
>>> string_to_delta('7d')
1088
>>> string_to_delta(u'7d')
1915
1089
datetime.timedelta(7)
1916
>>> string_to_delta('60s')
1090
>>> string_to_delta(u'60s')
1917
1091
datetime.timedelta(0, 60)
1918
>>> string_to_delta('60m')
1092
>>> string_to_delta(u'60m')
1919
1093
datetime.timedelta(0, 3600)
1920
>>> string_to_delta('24h')
1094
>>> string_to_delta(u'24h')
1921
1095
datetime.timedelta(1)
1922
>>> string_to_delta('1w')
1096
>>> string_to_delta(u'1w')
1923
1097
datetime.timedelta(7)
1924
>>> string_to_delta('5m 30s')
1098
>>> string_to_delta(u'5m 30s')
1925
1099
datetime.timedelta(0, 330)
1926
1100
"""
1927
1101
timevalue = datetime.timedelta(0)
1929
1103
try:
1930
1104
suffix = unicode(s[-1])
1931
1105
value = int(s[:-1])
1932
if suffix == "d":
1106
if suffix == u"d":
1933
1107
delta = datetime.timedelta(value)
1934
elif suffix == "s":
1108
elif suffix == u"s":
1935
1109
delta = datetime.timedelta(0, value)
1936
elif suffix == "m":
1110
elif suffix == u"m":
1937
1111
delta = datetime.timedelta(0, 0, 0, 0, value)
1938
elif suffix == "h":
1112
elif suffix == u"h":
1939
1113
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1940
elif suffix == "w":
1114
elif suffix == u"w":
1941
1115
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1942
1116
else:
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1117
raise ValueError
1118
except (ValueError, IndexError):
1119
raise ValueError
1946
1120
timevalue += delta
1947
1121
return timevalue
1948
1122
1949
1123
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
1950
1148
def daemon(nochdir = False, noclose = False):
1951
1149
"""See daemon(3). Standard BSD Unix function.
1952
1150
1955
1153
sys.exit()
1956
1154
os.setsid()
1957
1155
if not nochdir:
1958
os.chdir("/")
1156
os.chdir(u"/")
1959
1157
if os.fork():
1960
1158
sys.exit()
1961
1159
if not noclose:
1963
1161
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1964
1162
if not stat.S_ISCHR(os.fstat(null).st_mode):
1965
1163
raise OSError(errno.ENODEV,
1966
"%s not a character device"
1967
% os.path.devnull)
1164
u"/dev/null not a character device")
1968
1165
os.dup2(null, sys.stdin.fileno())
1969
1166
os.dup2(null, sys.stdout.fileno())
1970
1167
os.dup2(null, sys.stderr.fileno())
1974
1171
1975
1172
def main():
1976
1173
1977
##################################################################
1174
######################################################################
1978
1175
# Parsing of options, both command line and config file
1979
1176
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()
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]
2017
1203
2018
1204
if options.check:
2019
1205
import doctest
2021
1207
sys.exit()
2022
1208
2023
1209
# Default values for config file for server-global settings
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"
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",
2036
1219
}
2037
1220
2038
1221
# Parse config file for server-global settings
2039
1222
server_config = configparser.SafeConfigParser(server_defaults)
2040
1223
del server_defaults
2041
1224
server_config.read(os.path.join(options.configdir,
2042
"mandos.conf"))
1225
u"mandos.conf"))
2043
1226
# Convert the SafeConfigParser object to a dict
2044
1227
server_settings = server_config.defaults()
2045
1228
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
2048
1231
option)
2049
1232
if server_settings["port"]:
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
2052
1235
del server_config
2053
1236
2054
1237
# Override the settings from the config file with command line
2055
1238
# options, if set.
2056
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
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"):
2060
1242
value = getattr(options, option)
2061
1243
if value is not None:
2062
1244
server_settings[option] = value
2070
1252
##################################################################
2071
1253
2072
1254
# For convenience
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":
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":
2090
1264
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
2094
1268
2095
1269
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2097
client_config.read(os.path.join(server_settings["configdir"],
2098
"clients.conf"))
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"))
2099
1278
2100
1279
global mandos_dbus_service
2101
1280
mandos_dbus_service = None
2102
1281
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
2105
1284
ClientHandler,
2106
interface=(server_settings["interface"]
2107
or None),
1285
interface=server_settings[u"interface"],
2108
1286
use_ipv6=use_ipv6,
2109
1287
gnutls_priority=
2110
server_settings["priority"],
1288
server_settings[u"priority"],
2111
1289
use_dbus=use_dbus)
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)
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)
2118
1295
2119
1296
try:
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
2122
1299
except KeyError:
2123
1300
try:
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
2126
1303
except KeyError:
2127
1304
try:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
2130
1307
except KeyError:
2131
1308
uid = 65534
2132
1309
gid = 65534
2133
1310
try:
2134
1311
os.setgid(gid)
2135
1312
os.setuid(uid)
2136
except OSError as error:
1313
except OSError, error:
2137
1314
if error[0] != errno.EPERM:
2138
1315
raise error
2139
1316
1317
# Enable all possible GnuTLS debugging
2140
1318
if debug:
2141
# Enable all possible GnuTLS debugging
2142
2143
1319
# "Use a log level over 10 to enable all debugging options."
2144
1320
# - GnuTLS manual
2145
1321
gnutls.library.functions.gnutls_global_set_log_level(11)
2146
1322
2147
1323
@gnutls.library.types.gnutls_log_func
2148
1324
def debug_gnutls(level, string):
2149
logger.debug("GnuTLS: %s", string[:-1])
1325
logger.debug(u"GnuTLS: %s", string[:-1])
2150
1326
2151
1327
(gnutls.library.functions
2152
1328
.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()
2167
2168
gobject.threads_init()
2169
1329
2170
1330
global main_loop
2171
1331
# From the Avahi example code
2174
1334
bus = dbus.SystemBus()
2175
1335
# End of Avahi example code
2176
1336
if use_dbus:
2177
try:
2178
bus_name = dbus.service.BusName("se.recompile.Mandos",
2179
bus, do_not_queue=True)
2180
old_bus_name = (dbus.service.BusName
2181
("se.bsnet.fukt.Mandos", bus,
2182
do_not_queue=True))
2183
except dbus.exceptions.NameExistsException as e:
2184
logger.error(unicode(e) + ", disabling D-Bus")
2185
use_dbus = False
2186
server_settings["use_dbus"] = False
2187
tcp_server.use_dbus = False
1337
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2188
1338
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2189
service = AvahiServiceToSyslog(name =
2190
server_settings["servicename"],
2191
servicetype = "_mandos._tcp",
2192
protocol = protocol, bus = bus)
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
2193
1342
if server_settings["interface"]:
2194
1343
service.interface = (if_nametoindex
2195
(str(server_settings["interface"])))
2196
2197
global multiprocessing_manager
2198
multiprocessing_manager = multiprocessing.Manager()
1344
(str(server_settings[u"interface"])))
2199
1345
2200
1346
client_class = Client
2201
1347
if use_dbus:
2202
client_class = functools.partial(ClientDBusTransitional,
2203
bus = bus)
2204
2205
client_settings = Client.config_parser(client_config)
2206
old_client_settings = {}
2207
clients_data = {}
2208
2209
# Get client data and settings from last running state.
2210
if server_settings["restore"]:
2211
try:
2212
with open(stored_state_path, "rb") as stored_state:
2213
clients_data, old_client_settings = (pickle.load
2214
(stored_state))
2215
os.remove(stored_state_path)
2216
except IOError as e:
2217
logger.warning("Could not load persistent state: {0}"
2218
.format(e))
2219
if e.errno != errno.ENOENT:
2220
raise
2221
except EOFError as e:
2222
logger.warning("Could not load persistent state: "
2223
"EOFError: {0}".format(e))
2224
2225
with PGPEngine() as pgp:
2226
for client_name, client in clients_data.iteritems():
2227
# Decide which value to use after restoring saved state.
2228
# We have three different values: Old config file,
2229
# new config file, and saved state.
2230
# New config value takes precedence if it differs from old
2231
# config value, otherwise use saved state.
2232
for name, value in client_settings[client_name].items():
2233
try:
2234
# For each value in new config, check if it
2235
# differs from the old config value (Except for
2236
# the "secret" attribute)
2237
if (name != "secret" and
2238
value != old_client_settings[client_name]
2239
[name]):
2240
client[name] = value
2241
except KeyError:
2242
pass
2243
2244
# Clients who has passed its expire date can still be
2245
# enabled if its last checker was successful. Clients
2246
# whose checker failed before we stored its state is
2247
# assumed to have failed all checkers during downtime.
2248
if client["enabled"]:
2249
if datetime.datetime.utcnow() >= client["expires"]:
2250
if not client["last_checked_ok"]:
2251
logger.warning(
2252
"disabling client {0} - Client never "
2253
"performed a successfull checker"
2254
.format(client["name"]))
2255
client["enabled"] = False
2256
elif client["last_checker_status"] != 0:
2257
logger.warning(
2258
"disabling client {0} - Client "
2259
"last checker failed with error code {1}"
2260
.format(client["name"],
2261
client["last_checker_status"]))
2262
client["enabled"] = False
2263
else:
2264
client["expires"] = (datetime.datetime
2265
.utcnow()
2266
+ client["timeout"])
2267
2268
try:
2269
client["secret"] = (
2270
pgp.decrypt(client["encrypted_secret"],
2271
client_settings[client_name]
2272
["secret"]))
2273
except PGPError:
2274
# If decryption fails, we use secret from new settings
2275
logger.debug("Failed to decrypt {0} old secret"
2276
.format(client_name))
2277
client["secret"] = (
2278
client_settings[client_name]["secret"])
2279
2280
2281
# Add/remove clients based on new changes made to config
2282
for client_name in set(old_client_settings) - set(client_settings):
2283
del clients_data[client_name]
2284
for client_name in set(client_settings) - set(old_client_settings):
2285
clients_data[client_name] = client_settings[client_name]
2286
2287
# Create clients all clients
2288
for client_name, client in clients_data.iteritems():
2289
tcp_server.clients[client_name] = client_class(
2290
name = client_name, settings = client)
2291
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()))
2292
1353
if not tcp_server.clients:
2293
logger.warning("No clients defined")
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()
2294
1384
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
2295
1392
if not debug:
2296
try:
2297
with pidfile:
2298
pid = os.getpid()
2299
pidfile.write(str(pid) + "\n".encode("utf-8"))
2300
del pidfile
2301
except IOError:
2302
logger.error("Could not write to file %r with PID %d",
2303
pidfilename, pid)
2304
except NameError:
2305
# "pidfile" was never created
2306
pass
2307
del pidfilename
2308
1393
signal.signal(signal.SIGINT, signal.SIG_IGN)
2309
2310
1394
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2311
1395
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2312
1396
2314
1398
class MandosDBusService(dbus.service.Object):
2315
1399
"""A D-Bus proxy object"""
2316
1400
def __init__(self):
2317
dbus.service.Object.__init__(self, bus, "/")
2318
_interface = "se.recompile.Mandos"
2319
2320
@dbus.service.signal(_interface, signature="o")
2321
def ClientAdded(self, objpath):
2322
"D-Bus signal"
2323
pass
2324
2325
@dbus.service.signal(_interface, signature="ss")
2326
def ClientNotFound(self, fingerprint, address):
2327
"D-Bus signal"
2328
pass
2329
2330
@dbus.service.signal(_interface, signature="os")
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")
2331
1415
def ClientRemoved(self, objpath, name):
2332
1416
"D-Bus signal"
2333
1417
pass
2334
1418
2335
@dbus.service.method(_interface, out_signature="ao")
1419
@dbus.service.method(_interface, out_signature=u"ao")
2336
1420
def GetAllClients(self):
2337
1421
"D-Bus method"
2338
1422
return dbus.Array(c.dbus_object_path
2339
for c in
2340
tcp_server.clients.itervalues())
1423
for c in tcp_server.clients)
2341
1424
2342
1425
@dbus.service.method(_interface,
2343
out_signature="a{oa{sv}}")
1426
out_signature=u"a{oa{sv}}")
2344
1427
def GetAllClientsWithProperties(self):
2345
1428
"D-Bus method"
2346
1429
return dbus.Dictionary(
2347
((c.dbus_object_path, c.GetAll(""))
2348
for c in tcp_server.clients.itervalues()),
2349
signature="oa{sv}")
1430
((c.dbus_object_path, c.GetAllProperties())
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
2350
1433
2351
@dbus.service.method(_interface, in_signature="o")
1434
@dbus.service.method(_interface, in_signature=u"o")
2352
1435
def RemoveClient(self, object_path):
2353
1436
"D-Bus method"
2354
for c in tcp_server.clients.itervalues():
1437
for c in tcp_server.clients:
2355
1438
if c.dbus_object_path == object_path:
2356
del tcp_server.clients[c.name]
1439
tcp_server.clients.remove(c)
2357
1440
c.remove_from_connection()
2358
1441
# Don't signal anything except ClientRemoved
2359
c.disable(quiet=True)
1442
c.disable(signal=False)
2360
1443
# Emit D-Bus signal
2361
1444
self.ClientRemoved(object_path, c.name)
2362
1445
return
2363
raise KeyError(object_path)
1446
raise KeyError
2364
1447
2365
1448
del _interface
2366
1449
2367
class MandosDBusServiceTransitional(MandosDBusService):
2368
__metaclass__ = AlternateDBusNamesMetaclass
2369
mandos_dbus_service = MandosDBusServiceTransitional()
2370
2371
def cleanup():
2372
"Cleanup function; run on exit"
2373
service.cleanup()
2374
2375
multiprocessing.active_children()
2376
if not (tcp_server.clients or client_settings):
2377
return
2378
2379
# Store client before exiting. Secrets are encrypted with key
2380
# based on what config file has. If config file is
2381
# removed/edited, old secret will thus be unrecovable.
2382
clients = {}
2383
with PGPEngine() as pgp:
2384
for client in tcp_server.clients.itervalues():
2385
key = client_settings[client.name]["secret"]
2386
client.encrypted_secret = pgp.encrypt(client.secret,
2387
key)
2388
client_dict = {}
2389
2390
# A list of attributes that can not be pickled
2391
# + secret.
2392
exclude = set(("bus", "changedstate", "secret",
2393
"checker"))
2394
for name, typ in (inspect.getmembers
2395
(dbus.service.Object)):
2396
exclude.add(name)
2397
2398
client_dict["encrypted_secret"] = (client
2399
.encrypted_secret)
2400
for attr in client.client_structure:
2401
if attr not in exclude:
2402
client_dict[attr] = getattr(client, attr)
2403
2404
clients[client.name] = client_dict
2405
del client_settings[client.name]["secret"]
2406
2407
try:
2408
with os.fdopen(os.open(stored_state_path,
2409
(os.O_CREAT | os.O_WRONLY
2410
| os.O_TRUNC | os.O_EXCL),
2411
(stat.S_IREAD | stat.S_IWRITE)),
2412
"wb") as stored_state:
2413
pickle.dump((clients, client_settings), stored_state)
2414
except (IOError, OSError) as e:
2415
logger.warning("Could not save persistent state: {0}"
2416
.format(e))
2417
if e.errno not in set((errno.ENOENT, errno.EACCES,
2418
errno.EEXIST)):
2419
raise
2420
2421
# Delete all clients, and settings from config
2422
while tcp_server.clients:
2423
name, client = tcp_server.clients.popitem()
2424
if use_dbus:
2425
client.remove_from_connection()
2426
# Don't signal anything except ClientRemoved
2427
client.disable(quiet=True)
2428
if use_dbus:
2429
# Emit D-Bus signal
2430
mandos_dbus_service.ClientRemoved(client
2431
.dbus_object_path,
2432
client.name)
2433
client_settings.clear()
2434
2435
atexit.register(cleanup)
2436
2437
for client in tcp_server.clients.itervalues():
1450
mandos_dbus_service = MandosDBusService()
1451
1452
for client in tcp_server.clients:
2438
1453
if use_dbus:
2439
1454
# Emit D-Bus signal
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2441
# Need to initiate checking of clients
2442
if client.enabled:
2443
client.init_checker()
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
1457
client.enable()
2444
1458
2445
1459
tcp_server.enable()
2446
1460
tcp_server.server_activate()
2448
1462
# Find out what port we got
2449
1463
service.port = tcp_server.socket.getsockname()[1]
2450
1464
if use_ipv6:
2451
logger.info("Now listening on address %r, port %d,"
1465
logger.info(u"Now listening on address %r, port %d,"
2452
1466
" flowinfo %d, scope_id %d"
2453
1467
% tcp_server.socket.getsockname())
2454
1468
else: # IPv4
2455
logger.info("Now listening on address %r, port %d"
1469
logger.info(u"Now listening on address %r, port %d"
2456
1470
% tcp_server.socket.getsockname())
2457
1471
2458
1472
#service.interface = tcp_server.socket.getsockname()[3]
2461
1475
# From the Avahi example code
2462
1476
try:
2463
1477
service.activate()
2464
except dbus.exceptions.DBusException as error:
2465
logger.critical("DBusException: %s", error)
2466
cleanup()
1478
except dbus.exceptions.DBusException, error:
1479
logger.critical(u"DBusException: %s", error)
2467
1480
sys.exit(1)
2468
1481
# End of Avahi example code
2469
1482
2472
1485
(tcp_server.handle_request
2473
1486
(*args[2:], **kwargs) or True))
2474
1487
2475
logger.debug("Starting main loop")
1488
logger.debug(u"Starting main loop")
2476
1489
main_loop.run()
2477
except AvahiError as error:
2478
logger.critical("AvahiError: %s", error)
2479
cleanup()
1490
except AvahiError, error:
1491
logger.critical(u"AvahiError: %s", error)
2480
1492
sys.exit(1)
2481
1493
except KeyboardInterrupt:
2482
1494
if debug:
2483
print("", file=sys.stderr)
2484
logger.debug("Server received KeyboardInterrupt")
2485
logger.debug("Server exiting")
2486
# Must run before the D-Bus bus name gets deregistered
2487
cleanup()
1495
print >> sys.stderr
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
2488
1498
2489
1499
if __name__ == '__main__':
2490
1500
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0