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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(debug, 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
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
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)
211
96
212
97
class AvahiError(Exception):
213
98
def __init__(self, value, *args, **kwargs):
229
114
Attributes:
230
115
interface: integer; avahi.IF_UNSPEC or an interface index.
231
116
Used to optionally bind to the specified interface.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
234
119
See <http://www.dns-sd.org/ServiceTypes.html>
235
120
port: integer; what port to announce
236
121
TXT: list of strings; TXT record for the service
245
130
"""
246
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
132
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
133
domain = u"", host = u"", max_renames = 32768,
249
134
protocol = avahi.PROTO_UNSPEC, bus = None):
250
135
self.interface = interface
251
136
self.name = name
260
145
self.group = None # our entry group
261
146
self.server = None
262
147
self.bus = bus
263
self.entry_group_state_changed_match = None
264
148
def rename(self):
265
149
"""Derived from the Avahi example code"""
266
150
if self.rename_count >= self.max_renames:
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
269
153
self.rename_count)
270
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
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))
275
162
self.remove()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
163
self.add()
282
164
self.rename_count += 1
283
165
def remove(self):
284
166
"""Derived from the Avahi example code"""
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
288
167
if self.group is not None:
289
168
self.group.Reset()
290
169
def add(self):
291
170
"""Derived from the Avahi example code"""
292
self.remove()
293
171
if self.group is None:
294
172
self.group = dbus.Interface(
295
173
self.bus.get_object(avahi.DBUS_NAME,
296
174
self.server.EntryGroupNew()),
297
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
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' ...",
302
179
self.name, self.type)
303
180
self.group.AddService(
304
181
self.interface,
311
188
self.group.Commit()
312
189
def entry_group_state_changed(self, state, error):
313
190
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
191
logger.debug(u"Avahi state change: %i", state)
315
192
316
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
194
logger.debug(u"Zeroconf service established.")
318
195
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
196
logger.warning(u"Zeroconf service name collision.")
320
197
self.rename()
321
198
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
199
logger.critical(u"Avahi: Error in group state changed %s",
323
200
unicode(error))
324
raise AvahiGroupError("State changed: %s"
201
raise AvahiGroupError(u"State changed: %s"
325
202
% unicode(error))
326
203
def cleanup(self):
327
204
"""Derived from the Avahi example code"""
328
205
if self.group is not None:
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
206
self.group.Free()
334
207
self.group = None
335
self.remove()
336
def server_state_changed(self, state, error=None):
208
def server_state_changed(self, state):
337
209
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
353
213
elif state == avahi.SERVER_RUNNING:
354
214
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
360
215
def activate(self):
361
216
"""Derived from the Avahi example code"""
362
217
if self.server is None:
363
218
self.server = dbus.Interface(
364
219
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
220
avahi.DBUS_PATH_SERVER),
367
221
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
222
self.server.connect_to_signal(u"StateChanged",
369
223
self.server_state_changed)
370
224
self.server_state_changed(self.server.GetState())
371
225
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
381
226
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
388
227
class Client(object):
389
228
"""A representation of a client host served by this server.
390
229
391
230
Attributes:
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
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)
395
245
checker: subprocess.Popen(); a running checker process used
396
246
to see if the client lives.
397
247
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
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
401
253
runtime with vars(self) as dict, so that for
402
254
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
255
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
429
256
"""
430
257
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
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))
445
264
446
265
def timeout_milliseconds(self):
447
266
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
267
return self._datetime_to_milliseconds(self.timeout)
453
268
454
269
def interval_milliseconds(self):
455
270
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
271
return self._datetime_to_milliseconds(self.interval)
457
272
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
""" Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above"""
466
settings = {}
467
for client_name in config.sections():
468
section = dict(config.items(client_name))
469
client = settings[client_name] = {}
470
471
client["host"] = section["host"]
472
# Reformat values from string types to Python types
473
client["approved_by_default"] = config.getboolean(
474
client_name, "approved_by_default")
475
client["enabled"] = config.getboolean(client_name, "enabled")
476
477
client["fingerprint"] = (section["fingerprint"].upper()
478
.replace(" ", ""))
479
if "secret" in section:
480
client["secret"] = section["secret"].decode("base64")
481
elif "secfile" in section:
482
with open(os.path.expanduser(os.path.expandvars
483
(section["secfile"])),
484
"rb") as secfile:
485
client["secret"] = secfile.read()
486
else:
487
raise TypeError("No secret or secfile for section %s"
488
% section)
489
client["timeout"] = string_to_delta(section["timeout"])
490
client["extended_timeout"] = string_to_delta(
491
section["extended_timeout"])
492
client["interval"] = string_to_delta(section["interval"])
493
client["approval_delay"] = string_to_delta(
494
section["approval_delay"])
495
client["approval_duration"] = string_to_delta(
496
section["approval_duration"])
497
client["checker_command"] = section["checker"]
498
client["last_approval_request"] = None
499
client["last_checked_ok"] = None
500
client["last_checker_status"] = None
501
if client["enabled"]:
502
client["last_enabled"] = datetime.datetime.utcnow()
503
client["expires"] = (datetime.datetime.utcnow()
504
+ client["timeout"])
505
else:
506
client["last_enabled"] = None
507
client["expires"] = None
508
509
return settings
510
511
512
def __init__(self, settings, name = None):
273
def __init__(self, name = None, disable_hook=None, config=None):
513
274
"""Note: the 'checker' key in 'config' sets the
514
275
'checker_command' attribute and *not* the 'checker'
515
276
attribute."""
516
277
self.name = name
517
# adding all client settings
518
for setting, value in settings.iteritems():
519
setattr(self, setting, value)
520
521
logger.debug("Creating client %r", self.name)
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
522
281
# Uppercase and remove spaces from fingerprint for later
523
282
# comparison purposes with return value from the fingerprint()
524
283
# function
525
logger.debug(" Fingerprint: %s", self.fingerprint)
526
self.created = settings.get("created", datetime.datetime.utcnow())
527
528
# 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
529
305
self.checker = None
530
306
self.checker_initiator_tag = None
531
307
self.disable_initiator_tag = None
532
308
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
533
310
self.current_checker_command = None
534
self.approved = None
535
self.approvals_pending = 0
536
self.changedstate = (multiprocessing_manager
537
.Condition(multiprocessing_manager
538
.Lock()))
539
self.client_structure = [attr for attr in
540
self.__dict__.iterkeys()
541
if not attr.startswith("_")]
542
self.client_structure.append("client_structure")
543
544
for name, t in inspect.getmembers(type(self),
545
lambda obj:
546
isinstance(obj,
547
property)):
548
if not name.startswith("_"):
549
self.client_structure.append(name)
550
551
# Send notice to process children that client state has changed
552
def send_changedstate(self):
553
with self.changedstate:
554
self.changedstate.notify_all()
311
self.last_connect = None
555
312
556
313
def enable(self):
557
314
"""Start this client's checker and timeout hooks"""
558
if getattr(self, "enabled", False):
315
if getattr(self, u"enabled", False):
559
316
# Already enabled
560
317
return
561
self.send_changedstate()
562
self.expires = datetime.datetime.utcnow() + self.timeout
563
self.enabled = True
564
318
self.last_enabled = datetime.datetime.utcnow()
565
self.init_checker()
566
567
def disable(self, quiet=True):
568
"""Disable this client."""
569
if not getattr(self, "enabled", False):
570
return False
571
if not quiet:
572
self.send_changedstate()
573
if not quiet:
574
logger.info("Disabling client %s", self.name)
575
if getattr(self, "disable_initiator_tag", False):
576
gobject.source_remove(self.disable_initiator_tag)
577
self.disable_initiator_tag = None
578
self.expires = None
579
if getattr(self, "checker_initiator_tag", False):
580
gobject.source_remove(self.checker_initiator_tag)
581
self.checker_initiator_tag = None
582
self.stop_checker()
583
self.enabled = False
584
# Do not run this again if called by a gobject.timeout_add
585
return False
586
587
def __del__(self):
588
self.disable()
589
590
def init_checker(self):
591
319
# Schedule a new checker to be started an 'interval' from now,
592
320
# and every interval from then on.
593
321
self.checker_initiator_tag = (gobject.timeout_add
594
322
(self.interval_milliseconds(),
595
323
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
596
326
# Schedule a disable() when 'timeout' has passed
597
327
self.disable_initiator_tag = (gobject.timeout_add
598
328
(self.timeout_milliseconds(),
599
329
self.disable))
600
# Also start a new checker *right now*.
601
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()
602
353
603
354
def checker_callback(self, pid, condition, command):
604
355
"""The checker has completed, so take appropriate actions."""
605
356
self.checker_callback_tag = None
606
357
self.checker = None
607
358
if os.WIFEXITED(condition):
608
self.last_checker_status = os.WEXITSTATUS(condition)
609
if self.last_checker_status == 0:
610
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",
611
362
vars(self))
612
363
self.checked_ok()
613
364
else:
614
logger.info("Checker for %(name)s failed",
365
logger.info(u"Checker for %(name)s failed",
615
366
vars(self))
616
367
else:
617
self.last_checker_status = -1
618
logger.warning("Checker for %(name)s crashed?",
368
logger.warning(u"Checker for %(name)s crashed?",
619
369
vars(self))
620
370
621
def checked_ok(self, timeout=None):
371
def checked_ok(self):
622
372
"""Bump up the timeout for this client.
623
373
624
374
This should only be called when the client has been seen,
625
375
alive and well.
626
376
"""
627
if timeout is None:
628
timeout = self.timeout
629
377
self.last_checked_ok = datetime.datetime.utcnow()
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
if getattr(self, "enabled", False):
633
self.disable_initiator_tag = (gobject.timeout_add
634
(timedelta_to_milliseconds
635
(timeout), self.disable))
636
self.expires = datetime.datetime.utcnow() + timeout
637
638
def need_approval(self):
639
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))
640
382
641
383
def start_checker(self):
642
384
"""Start a new checker subprocess if one is not running.
649
391
# client would inevitably timeout, since no checker would get
650
392
# a chance to run to completion. If we instead leave running
651
393
# checkers alone, the checker would have to take more time
652
# than 'timeout' for the client to be disabled, which is as it
653
# should be.
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
654
396
655
397
# If a checker exists, make sure it is not a zombie
656
try:
398
if self.checker is not None:
657
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
658
except (AttributeError, OSError) as error:
659
if (isinstance(error, OSError)
660
and error.errno != errno.ECHILD):
661
raise error
662
else:
663
400
if pid:
664
logger.warning("Checker was a zombie")
401
logger.warning(u"Checker was a zombie")
665
402
gobject.source_remove(self.checker_callback_tag)
666
403
self.checker_callback(pid, status,
667
404
self.current_checker_command)
672
409
command = self.checker_command % self.host
673
410
except TypeError:
674
411
# Escape attributes for the shell
675
escaped_attrs = dict(
676
(attr,
677
re.escape(unicode(str(getattr(self, attr, "")),
678
errors=
679
'replace')))
680
for attr in
681
self.runtime_expansions)
682
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())
683
418
try:
684
419
command = self.checker_command % escaped_attrs
685
except TypeError as error:
686
logger.error('Could not format string "%s":'
687
' %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)
688
423
return True # Try again later
689
424
self.current_checker_command = command
690
425
try:
691
logger.info("Starting checker %r for %s",
426
logger.info(u"Starting checker %r for %s",
692
427
command, self.name)
693
428
# We don't need to redirect stdout and stderr, since
694
429
# in normal mode, that is already done by daemon(),
696
431
# always replaced by /dev/null.)
697
432
self.checker = subprocess.Popen(command,
698
433
close_fds=True,
699
shell=True, cwd="/")
434
shell=True, cwd=u"/")
700
435
self.checker_callback_tag = (gobject.child_watch_add
701
436
(self.checker.pid,
702
437
self.checker_callback,
707
442
if pid:
708
443
gobject.source_remove(self.checker_callback_tag)
709
444
self.checker_callback(pid, status, command)
710
except OSError as error:
711
logger.error("Failed to start subprocess: %s",
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
712
447
error)
713
448
# Re-run this periodically if run by gobject.timeout_add
714
449
return True
718
453
if self.checker_callback_tag:
719
454
gobject.source_remove(self.checker_callback_tag)
720
455
self.checker_callback_tag = None
721
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
722
457
return
723
logger.debug("Stopping checker for %(name)s", vars(self))
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
724
459
try:
725
460
os.kill(self.checker.pid, signal.SIGTERM)
726
#time.sleep(0.5)
461
#os.sleep(0.5)
727
462
#if self.checker.poll() is None:
728
463
# os.kill(self.checker.pid, signal.SIGKILL)
729
except OSError as error:
464
except OSError, error:
730
465
if error.errno != errno.ESRCH: # No such process
731
466
raise
732
467
self.checker = None
733
734
735
def dbus_service_property(dbus_interface, signature="v",
736
access="readwrite", byte_arrays=False):
737
"""Decorators for marking methods of a DBusObjectWithProperties to
738
become properties on the D-Bus.
739
740
The decorated method will be called with no arguments by "Get"
741
and with one argument by "Set".
742
743
The parameters, where they are supported, are the same as
744
dbus.service.method, except there is only "signature", since the
745
type from Get() and the type sent to Set() is the same.
746
"""
747
# Encoding deeply encoded byte arrays is not supported yet by the
748
# "Set" method, so we fail early here:
749
if byte_arrays and signature != "ay":
750
raise ValueError("Byte arrays not supported for non-'ay'"
751
" signature %r" % signature)
752
def decorator(func):
753
func._dbus_is_property = True
754
func._dbus_interface = dbus_interface
755
func._dbus_signature = signature
756
func._dbus_access = access
757
func._dbus_name = func.__name__
758
if func._dbus_name.endswith("_dbus_property"):
759
func._dbus_name = func._dbus_name[:-14]
760
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
761
return func
762
return decorator
763
764
765
class DBusPropertyException(dbus.exceptions.DBusException):
766
"""A base class for D-Bus property-related exceptions
767
"""
768
def __unicode__(self):
769
return unicode(str(self))
770
771
772
class DBusPropertyAccessException(DBusPropertyException):
773
"""A property's access permissions disallows an operation.
774
"""
775
pass
776
777
778
class DBusPropertyNotFound(DBusPropertyException):
779
"""An attempt was made to access a non-existing property.
780
"""
781
pass
782
783
784
class DBusObjectWithProperties(dbus.service.Object):
785
"""A D-Bus object with properties.
786
787
Classes inheriting from this can use the dbus_service_property
788
decorator to expose methods as D-Bus properties. It exposes the
789
standard Get(), Set(), and GetAll() methods on the D-Bus.
790
"""
791
792
@staticmethod
793
def _is_dbus_property(obj):
794
return getattr(obj, "_dbus_is_property", False)
795
796
def _get_all_dbus_properties(self):
797
"""Returns a generator of (name, attribute) pairs
798
"""
799
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
800
for cls in self.__class__.__mro__
801
for name, prop in
802
inspect.getmembers(cls, self._is_dbus_property))
803
804
def _get_dbus_property(self, interface_name, property_name):
805
"""Returns a bound method if one exists which is a D-Bus
806
property with the specified name and interface.
807
"""
808
for cls in self.__class__.__mro__:
809
for name, value in (inspect.getmembers
810
(cls, self._is_dbus_property)):
811
if (value._dbus_name == property_name
812
and value._dbus_interface == interface_name):
813
return value.__get__(self)
814
815
# No such property
816
raise DBusPropertyNotFound(self.dbus_object_path + ":"
817
+ interface_name + "."
818
+ property_name)
819
820
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
821
out_signature="v")
822
def Get(self, interface_name, property_name):
823
"""Standard D-Bus property Get() method, see D-Bus standard.
824
"""
825
prop = self._get_dbus_property(interface_name, property_name)
826
if prop._dbus_access == "write":
827
raise DBusPropertyAccessException(property_name)
828
value = prop()
829
if not hasattr(value, "variant_level"):
830
return value
831
return type(value)(value, variant_level=value.variant_level+1)
832
833
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
834
def Set(self, interface_name, property_name, value):
835
"""Standard D-Bus property Set() method, see D-Bus standard.
836
"""
837
prop = self._get_dbus_property(interface_name, property_name)
838
if prop._dbus_access == "read":
839
raise DBusPropertyAccessException(property_name)
840
if prop._dbus_get_args_options["byte_arrays"]:
841
# The byte_arrays option is not supported yet on
842
# signatures other than "ay".
843
if prop._dbus_signature != "ay":
844
raise ValueError
845
value = dbus.ByteArray(''.join(unichr(byte)
846
for byte in value))
847
prop(value)
848
849
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
850
out_signature="a{sv}")
851
def GetAll(self, interface_name):
852
"""Standard D-Bus property GetAll() method, see D-Bus
853
standard.
854
855
Note: Will not include properties with access="write".
856
"""
857
properties = {}
858
for name, prop in self._get_all_dbus_properties():
859
if (interface_name
860
and interface_name != prop._dbus_interface):
861
# Interface non-empty but did not match
862
continue
863
# Ignore write-only properties
864
if prop._dbus_access == "write":
865
continue
866
value = prop()
867
if not hasattr(value, "variant_level"):
868
properties[name] = value
869
continue
870
properties[name] = type(value)(value, variant_level=
871
value.variant_level+1)
872
return dbus.Dictionary(properties, signature="sv")
873
874
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
875
out_signature="s",
876
path_keyword='object_path',
877
connection_keyword='connection')
878
def Introspect(self, object_path, connection):
879
"""Standard D-Bus method, overloaded to insert property tags.
880
"""
881
xmlstring = dbus.service.Object.Introspect(self, object_path,
882
connection)
883
try:
884
document = xml.dom.minidom.parseString(xmlstring)
885
def make_tag(document, name, prop):
886
e = document.createElement("property")
887
e.setAttribute("name", name)
888
e.setAttribute("type", prop._dbus_signature)
889
e.setAttribute("access", prop._dbus_access)
890
return e
891
for if_tag in document.getElementsByTagName("interface"):
892
for tag in (make_tag(document, name, prop)
893
for name, prop
894
in self._get_all_dbus_properties()
895
if prop._dbus_interface
896
== if_tag.getAttribute("name")):
897
if_tag.appendChild(tag)
898
# Add the names to the return values for the
899
# "org.freedesktop.DBus.Properties" methods
900
if (if_tag.getAttribute("name")
901
== "org.freedesktop.DBus.Properties"):
902
for cn in if_tag.getElementsByTagName("method"):
903
if cn.getAttribute("name") == "Get":
904
for arg in cn.getElementsByTagName("arg"):
905
if (arg.getAttribute("direction")
906
== "out"):
907
arg.setAttribute("name", "value")
908
elif cn.getAttribute("name") == "GetAll":
909
for arg in cn.getElementsByTagName("arg"):
910
if (arg.getAttribute("direction")
911
== "out"):
912
arg.setAttribute("name", "props")
913
xmlstring = document.toxml("utf-8")
914
document.unlink()
915
except (AttributeError, xml.dom.DOMException,
916
xml.parsers.expat.ExpatError) as error:
917
logger.error("Failed to override Introspection method",
918
error)
919
return xmlstring
920
921
922
def datetime_to_dbus (dt, variant_level=0):
923
"""Convert a UTC datetime.datetime() to a D-Bus type."""
924
if dt is None:
925
return dbus.String("", variant_level = variant_level)
926
return dbus.String(dt.isoformat(),
927
variant_level=variant_level)
928
929
930
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
931
.__metaclass__):
932
"""Applied to an empty subclass of a D-Bus object, this metaclass
933
will add additional D-Bus attributes matching a certain pattern.
934
"""
935
def __new__(mcs, name, bases, attr):
936
# Go through all the base classes which could have D-Bus
937
# methods, signals, or properties in them
938
for base in (b for b in bases
939
if issubclass(b, dbus.service.Object)):
940
# Go though all attributes of the base class
941
for attrname, attribute in inspect.getmembers(base):
942
# Ignore non-D-Bus attributes, and D-Bus attributes
943
# with the wrong interface name
944
if (not hasattr(attribute, "_dbus_interface")
945
or not attribute._dbus_interface
946
.startswith("se.recompile.Mandos")):
947
continue
948
# Create an alternate D-Bus interface name based on
949
# the current name
950
alt_interface = (attribute._dbus_interface
951
.replace("se.recompile.Mandos",
952
"se.bsnet.fukt.Mandos"))
953
# Is this a D-Bus signal?
954
if getattr(attribute, "_dbus_is_signal", False):
955
# Extract the original non-method function by
956
# black magic
957
nonmethod_func = (dict(
958
zip(attribute.func_code.co_freevars,
959
attribute.__closure__))["func"]
960
.cell_contents)
961
# Create a new, but exactly alike, function
962
# object, and decorate it to be a new D-Bus signal
963
# with the alternate D-Bus interface name
964
new_function = (dbus.service.signal
965
(alt_interface,
966
attribute._dbus_signature)
967
(types.FunctionType(
968
nonmethod_func.func_code,
969
nonmethod_func.func_globals,
970
nonmethod_func.func_name,
971
nonmethod_func.func_defaults,
972
nonmethod_func.func_closure)))
973
# Define a creator of a function to call both the
974
# old and new functions, so both the old and new
975
# signals gets sent when the function is called
976
def fixscope(func1, func2):
977
"""This function is a scope container to pass
978
func1 and func2 to the "call_both" function
979
outside of its arguments"""
980
def call_both(*args, **kwargs):
981
"""This function will emit two D-Bus
982
signals by calling func1 and func2"""
983
func1(*args, **kwargs)
984
func2(*args, **kwargs)
985
return call_both
986
# Create the "call_both" function and add it to
987
# the class
988
attr[attrname] = fixscope(attribute,
989
new_function)
990
# Is this a D-Bus method?
991
elif getattr(attribute, "_dbus_is_method", False):
992
# Create a new, but exactly alike, function
993
# object. Decorate it to be a new D-Bus method
994
# with the alternate D-Bus interface name. Add it
995
# to the class.
996
attr[attrname] = (dbus.service.method
997
(alt_interface,
998
attribute._dbus_in_signature,
999
attribute._dbus_out_signature)
1000
(types.FunctionType
1001
(attribute.func_code,
1002
attribute.func_globals,
1003
attribute.func_name,
1004
attribute.func_defaults,
1005
attribute.func_closure)))
1006
# Is this a D-Bus property?
1007
elif getattr(attribute, "_dbus_is_property", False):
1008
# Create a new, but exactly alike, function
1009
# object, and decorate it to be a new D-Bus
1010
# property with the alternate D-Bus interface
1011
# name. Add it to the class.
1012
attr[attrname] = (dbus_service_property
1013
(alt_interface,
1014
attribute._dbus_signature,
1015
attribute._dbus_access,
1016
attribute
1017
._dbus_get_args_options
1018
["byte_arrays"])
1019
(types.FunctionType
1020
(attribute.func_code,
1021
attribute.func_globals,
1022
attribute.func_name,
1023
attribute.func_defaults,
1024
attribute.func_closure)))
1025
return type.__new__(mcs, name, bases, attr)
1026
1027
1028
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):
1029
481
"""A Client class using D-Bus
1030
482
1031
483
Attributes:
1032
484
dbus_object_path: dbus.ObjectPath
1033
485
bus: dbus.SystemBus()
1034
486
"""
1035
1036
runtime_expansions = (Client.runtime_expansions
1037
+ ("dbus_object_path",))
1038
1039
487
# dbus.service.Object doesn't use super(), so we can't either.
1040
488
1041
489
def __init__(self, bus = None, *args, **kwargs):
1042
490
self.bus = bus
1043
491
Client.__init__(self, *args, **kwargs)
1044
self._approvals_pending = 0
1045
1046
self._approvals_pending = 0
1047
492
# Only now, when this client is initialized, can it show up on
1048
493
# the D-Bus
1049
client_object_name = unicode(self.name).translate(
1050
{ord("."): ord("_"),
1051
ord("-"): ord("_")})
1052
494
self.dbus_object_path = (dbus.ObjectPath
1053
("/clients/" + client_object_name))
1054
DBusObjectWithProperties.__init__(self, self.bus,
1055
self.dbus_object_path)
1056
1057
def notifychangeproperty(transform_func,
1058
dbus_name, type_func=lambda x: x,
1059
variant_level=1):
1060
""" Modify a variable so that it's a property which announces
1061
its changes to DBus.
1062
1063
transform_fun: Function that takes a value and a variant_level
1064
and transforms it to a D-Bus type.
1065
dbus_name: D-Bus name of the variable
1066
type_func: Function that transform the value before sending it
1067
to the D-Bus. Default: no transform
1068
variant_level: D-Bus variant level. Default: 1
1069
"""
1070
attrname = "_{0}".format(dbus_name)
1071
def setter(self, value):
1072
if hasattr(self, "dbus_object_path"):
1073
if (not hasattr(self, attrname) or
1074
type_func(getattr(self, attrname, None))
1075
!= type_func(value)):
1076
dbus_value = transform_func(type_func(value),
1077
variant_level
1078
=variant_level)
1079
self.PropertyChanged(dbus.String(dbus_name),
1080
dbus_value)
1081
setattr(self, attrname, value)
1082
1083
return property(lambda self: getattr(self, attrname), setter)
1084
1085
1086
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1087
approvals_pending = notifychangeproperty(dbus.Boolean,
1088
"ApprovalPending",
1089
type_func = bool)
1090
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1091
last_enabled = notifychangeproperty(datetime_to_dbus,
1092
"LastEnabled")
1093
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1094
type_func = lambda checker:
1095
checker is not None)
1096
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1097
"LastCheckedOK")
1098
last_approval_request = notifychangeproperty(
1099
datetime_to_dbus, "LastApprovalRequest")
1100
approved_by_default = notifychangeproperty(dbus.Boolean,
1101
"ApprovedByDefault")
1102
approval_delay = notifychangeproperty(dbus.UInt64,
1103
"ApprovalDelay",
1104
type_func =
1105
timedelta_to_milliseconds)
1106
approval_duration = notifychangeproperty(
1107
dbus.UInt64, "ApprovalDuration",
1108
type_func = timedelta_to_milliseconds)
1109
host = notifychangeproperty(dbus.String, "Host")
1110
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1111
type_func =
1112
timedelta_to_milliseconds)
1113
extended_timeout = notifychangeproperty(
1114
dbus.UInt64, "ExtendedTimeout",
1115
type_func = timedelta_to_milliseconds)
1116
interval = notifychangeproperty(dbus.UInt64,
1117
"Interval",
1118
type_func =
1119
timedelta_to_milliseconds)
1120
checker_command = notifychangeproperty(dbus.String, "Checker")
1121
1122
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
1123
527
1124
528
def __del__(self, *args, **kwargs):
1125
529
try:
1126
530
self.remove_from_connection()
1127
531
except LookupError:
1128
532
pass
1129
if hasattr(DBusObjectWithProperties, "__del__"):
1130
DBusObjectWithProperties.__del__(self, *args, **kwargs)
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1131
535
Client.__del__(self, *args, **kwargs)
1132
536
1133
537
def checker_callback(self, pid, condition, command,
1134
538
*args, **kwargs):
1135
539
self.checker_callback_tag = None
1136
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
1137
544
if os.WIFEXITED(condition):
1138
545
exitstatus = os.WEXITSTATUS(condition)
1139
546
# Emit D-Bus signal
1149
556
return Client.checker_callback(self, pid, condition, command,
1150
557
*args, **kwargs)
1151
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
1152
568
def start_checker(self, *args, **kwargs):
1153
569
old_checker = self.checker
1154
570
if self.checker is not None:
1161
577
and old_checker_pid != self.checker.pid):
1162
578
# Emit D-Bus signal
1163
579
self.CheckerStarted(self.current_checker_command)
1164
return r
1165
1166
def _reset_approved(self):
1167
self.approved = None
1168
return False
1169
1170
def approve(self, value=True):
1171
self.send_changedstate()
1172
self.approved = value
1173
gobject.timeout_add(timedelta_to_milliseconds
1174
(self.approval_duration),
1175
self._reset_approved)
1176
1177
1178
## D-Bus methods, signals & properties
1179
_interface = "se.recompile.Mandos.Client"
1180
1181
## 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()
1182
601
1183
602
# CheckerCompleted - signal
1184
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
1185
604
def CheckerCompleted(self, exitcode, waitstatus, command):
1186
605
"D-Bus signal"
1187
606
pass
1188
607
1189
608
# CheckerStarted - signal
1190
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
1191
610
def CheckerStarted(self, command):
1192
611
"D-Bus signal"
1193
612
pass
1194
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
1195
662
# PropertyChanged - signal
1196
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
1197
664
def PropertyChanged(self, property, value):
1198
665
"D-Bus signal"
1199
666
pass
1200
667
1201
# GotSecret - signal
668
# ReceivedSecret - signal
1202
669
@dbus.service.signal(_interface)
1203
def GotSecret(self):
1204
"""D-Bus signal
1205
Is sent after a successful transfer of secret from the Mandos
1206
server to mandos-client
1207
"""
670
def ReceivedSecret(self):
671
"D-Bus signal"
1208
672
pass
1209
673
1210
674
# Rejected - signal
1211
@dbus.service.signal(_interface, signature="s")
1212
def Rejected(self, reason):
1213
"D-Bus signal"
1214
pass
1215
1216
# NeedApproval - signal
1217
@dbus.service.signal(_interface, signature="tb")
1218
def NeedApproval(self, timeout, default):
1219
"D-Bus signal"
1220
return self.need_approval()
1221
1222
# NeRwequest - signal
1223
@dbus.service.signal(_interface, signature="s")
1224
def NewRequest(self, ip):
1225
"""D-Bus signal
1226
Is sent after a client request a password.
1227
"""
1228
pass
1229
1230
## Methods
1231
1232
# Approve - method
1233
@dbus.service.method(_interface, in_signature="b")
1234
def Approve(self, value):
1235
self.approve(value)
1236
1237
# CheckedOK - method
1238
@dbus.service.method(_interface)
1239
def CheckedOK(self):
1240
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)))
1241
723
1242
724
# Enable - method
1243
725
@dbus.service.method(_interface)
1262
744
def StopChecker(self):
1263
745
self.stop_checker()
1264
746
1265
## Properties
1266
1267
# ApprovalPending - property
1268
@dbus_service_property(_interface, signature="b", access="read")
1269
def ApprovalPending_dbus_property(self):
1270
return dbus.Boolean(bool(self.approvals_pending))
1271
1272
# ApprovedByDefault - property
1273
@dbus_service_property(_interface, signature="b",
1274
access="readwrite")
1275
def ApprovedByDefault_dbus_property(self, value=None):
1276
if value is None: # get
1277
return dbus.Boolean(self.approved_by_default)
1278
self.approved_by_default = bool(value)
1279
1280
# ApprovalDelay - property
1281
@dbus_service_property(_interface, signature="t",
1282
access="readwrite")
1283
def ApprovalDelay_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.UInt64(self.approval_delay_milliseconds())
1286
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1287
1288
# ApprovalDuration - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDuration_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(timedelta_to_milliseconds(
1294
self.approval_duration))
1295
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1296
1297
# Name - property
1298
@dbus_service_property(_interface, signature="s", access="read")
1299
def Name_dbus_property(self):
1300
return dbus.String(self.name)
1301
1302
# Fingerprint - property
1303
@dbus_service_property(_interface, signature="s", access="read")
1304
def Fingerprint_dbus_property(self):
1305
return dbus.String(self.fingerprint)
1306
1307
# Host - property
1308
@dbus_service_property(_interface, signature="s",
1309
access="readwrite")
1310
def Host_dbus_property(self, value=None):
1311
if value is None: # get
1312
return dbus.String(self.host)
1313
self.host = unicode(value)
1314
1315
# Created - property
1316
@dbus_service_property(_interface, signature="s", access="read")
1317
def Created_dbus_property(self):
1318
return datetime_to_dbus(self.created)
1319
1320
# LastEnabled - property
1321
@dbus_service_property(_interface, signature="s", access="read")
1322
def LastEnabled_dbus_property(self):
1323
return datetime_to_dbus(self.last_enabled)
1324
1325
# Enabled - property
1326
@dbus_service_property(_interface, signature="b",
1327
access="readwrite")
1328
def Enabled_dbus_property(self, value=None):
1329
if value is None: # get
1330
return dbus.Boolean(self.enabled)
1331
if value:
1332
self.enable()
1333
else:
1334
self.disable()
1335
1336
# LastCheckedOK - property
1337
@dbus_service_property(_interface, signature="s",
1338
access="readwrite")
1339
def LastCheckedOK_dbus_property(self, value=None):
1340
if value is not None:
1341
self.checked_ok()
1342
return
1343
return datetime_to_dbus(self.last_checked_ok)
1344
1345
# Expires - property
1346
@dbus_service_property(_interface, signature="s", access="read")
1347
def Expires_dbus_property(self):
1348
return datetime_to_dbus(self.expires)
1349
1350
# LastApprovalRequest - property
1351
@dbus_service_property(_interface, signature="s", access="read")
1352
def LastApprovalRequest_dbus_property(self):
1353
return datetime_to_dbus(self.last_approval_request)
1354
1355
# Timeout - property
1356
@dbus_service_property(_interface, signature="t",
1357
access="readwrite")
1358
def Timeout_dbus_property(self, value=None):
1359
if value is None: # get
1360
return dbus.UInt64(self.timeout_milliseconds())
1361
self.timeout = datetime.timedelta(0, 0, 0, value)
1362
if getattr(self, "disable_initiator_tag", None) is None:
1363
return
1364
# Reschedule timeout
1365
gobject.source_remove(self.disable_initiator_tag)
1366
self.disable_initiator_tag = None
1367
self.expires = None
1368
time_to_die = timedelta_to_milliseconds((self
1369
.last_checked_ok
1370
+ self.timeout)
1371
- datetime.datetime
1372
.utcnow())
1373
if time_to_die <= 0:
1374
# The timeout has passed
1375
self.disable()
1376
else:
1377
self.expires = (datetime.datetime.utcnow()
1378
+ datetime.timedelta(milliseconds =
1379
time_to_die))
1380
self.disable_initiator_tag = (gobject.timeout_add
1381
(time_to_die, self.disable))
1382
1383
# ExtendedTimeout - property
1384
@dbus_service_property(_interface, signature="t",
1385
access="readwrite")
1386
def ExtendedTimeout_dbus_property(self, value=None):
1387
if value is None: # get
1388
return dbus.UInt64(self.extended_timeout_milliseconds())
1389
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1390
1391
# Interval - property
1392
@dbus_service_property(_interface, signature="t",
1393
access="readwrite")
1394
def Interval_dbus_property(self, value=None):
1395
if value is None: # get
1396
return dbus.UInt64(self.interval_milliseconds())
1397
self.interval = datetime.timedelta(0, 0, 0, value)
1398
if getattr(self, "checker_initiator_tag", None) is None:
1399
return
1400
if self.enabled:
1401
# Reschedule checker run
1402
gobject.source_remove(self.checker_initiator_tag)
1403
self.checker_initiator_tag = (gobject.timeout_add
1404
(value, self.start_checker))
1405
self.start_checker() # Start one now, too
1406
1407
# Checker - property
1408
@dbus_service_property(_interface, signature="s",
1409
access="readwrite")
1410
def Checker_dbus_property(self, value=None):
1411
if value is None: # get
1412
return dbus.String(self.checker_command)
1413
self.checker_command = unicode(value)
1414
1415
# CheckerRunning - property
1416
@dbus_service_property(_interface, signature="b",
1417
access="readwrite")
1418
def CheckerRunning_dbus_property(self, value=None):
1419
if value is None: # get
1420
return dbus.Boolean(self.checker is not None)
1421
if value:
1422
self.start_checker()
1423
else:
1424
self.stop_checker()
1425
1426
# ObjectPath - property
1427
@dbus_service_property(_interface, signature="o", access="read")
1428
def ObjectPath_dbus_property(self):
1429
return self.dbus_object_path # is already a dbus.ObjectPath
1430
1431
# Secret = property
1432
@dbus_service_property(_interface, signature="ay",
1433
access="write", byte_arrays=True)
1434
def Secret_dbus_property(self, value):
1435
self.secret = str(value)
1436
1437
747
del _interface
1438
748
1439
749
1440
class ProxyClient(object):
1441
def __init__(self, child_pipe, fpr, address):
1442
self._pipe = child_pipe
1443
self._pipe.send(('init', fpr, address))
1444
if not self._pipe.recv():
1445
raise KeyError()
1446
1447
def __getattribute__(self, name):
1448
if name == '_pipe':
1449
return super(ProxyClient, self).__getattribute__(name)
1450
self._pipe.send(('getattr', name))
1451
data = self._pipe.recv()
1452
if data[0] == 'data':
1453
return data[1]
1454
if data[0] == 'function':
1455
def func(*args, **kwargs):
1456
self._pipe.send(('funcall', name, args, kwargs))
1457
return self._pipe.recv()[1]
1458
return func
1459
1460
def __setattr__(self, name, value):
1461
if name == '_pipe':
1462
return super(ProxyClient, self).__setattr__(name, value)
1463
self._pipe.send(('setattr', name, value))
1464
1465
1466
class ClientDBusTransitional(ClientDBus):
1467
__metaclass__ = AlternateDBusNamesMetaclass
1468
1469
1470
750
class ClientHandler(socketserver.BaseRequestHandler, object):
1471
751
"""A class to handle client connections.
1472
752
1474
754
Note: This will run in its own forked process."""
1475
755
1476
756
def handle(self):
1477
with contextlib.closing(self.server.child_pipe) as child_pipe:
1478
logger.info("TCP connection from: %s",
1479
unicode(self.client_address))
1480
logger.debug("Pipe FD: %d",
1481
self.server.child_pipe.fileno())
1482
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:
1483
762
session = (gnutls.connection
1484
763
.ClientSession(self.request,
1485
764
gnutls.connection
1486
765
.X509Credentials()))
1487
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
1488
776
# Note: gnutls.connection.X509Credentials is really a
1489
777
# generic GnuTLS certificate credentials object so long as
1490
778
# no X.509 keys are added to it. Therefore, we can use it
1491
779
# here despite using OpenPGP certificates.
1492
780
1493
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1494
# "+AES-256-CBC", "+SHA1",
1495
# "+COMP-NULL", "+CTYPE-OPENPGP",
1496
# "+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"))
1497
785
# Use a fallback default, since this MUST be set.
1498
786
priority = self.server.gnutls_priority
1499
787
if priority is None:
1500
priority = "NORMAL"
788
priority = u"NORMAL"
1501
789
(gnutls.library.functions
1502
790
.gnutls_priority_set_direct(session._c_object,
1503
791
priority, None))
1504
792
1505
# Start communication using the Mandos protocol
1506
# Get protocol number
1507
line = self.request.makefile().readline()
1508
logger.debug("Protocol version: %r", line)
1509
try:
1510
if int(line.strip().split()[0]) > 1:
1511
raise RuntimeError
1512
except (ValueError, IndexError, RuntimeError) as error:
1513
logger.error("Unknown protocol version: %s", error)
1514
return
1515
1516
# Start GnuTLS connection
1517
793
try:
1518
794
session.handshake()
1519
except gnutls.errors.GNUTLSError as error:
1520
logger.warning("Handshake failed: %s", error)
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1521
797
# Do not run session.bye() here: the session is not
1522
798
# established. Just abandon the request.
1523
799
return
1524
logger.debug("Handshake succeeded")
1525
1526
approval_required = False
800
logger.debug(u"Handshake succeeded")
1527
801
try:
1528
try:
1529
fpr = self.fingerprint(self.peer_certificate
1530
(session))
1531
except (TypeError,
1532
gnutls.errors.GNUTLSError) as error:
1533
logger.warning("Bad certificate: %s", error)
1534
return
1535
logger.debug("Fingerprint: %s", fpr)
1536
1537
try:
1538
client = ProxyClient(child_pipe, fpr,
1539
self.client_address)
1540
except KeyError:
1541
return
1542
1543
if self.server.use_dbus:
1544
# Emit D-Bus signal
1545
client.NewRequest(str(self.client_address))
1546
1547
if client.approval_delay:
1548
delay = client.approval_delay
1549
client.approvals_pending += 1
1550
approval_required = True
1551
1552
while True:
1553
if not client.enabled:
1554
logger.info("Client %s is disabled",
1555
client.name)
1556
if self.server.use_dbus:
1557
# Emit D-Bus signal
1558
client.Rejected("Disabled")
1559
return
1560
1561
if client.approved or not client.approval_delay:
1562
#We are approved or approval is disabled
1563
break
1564
elif client.approved is None:
1565
logger.info("Client %s needs approval",
1566
client.name)
1567
if self.server.use_dbus:
1568
# Emit D-Bus signal
1569
client.NeedApproval(
1570
client.approval_delay_milliseconds(),
1571
client.approved_by_default)
1572
else:
1573
logger.warning("Client %s was not approved",
1574
client.name)
1575
if self.server.use_dbus:
1576
# Emit D-Bus signal
1577
client.Rejected("Denied")
1578
return
1579
1580
#wait until timeout or approved
1581
time = datetime.datetime.now()
1582
client.changedstate.acquire()
1583
(client.changedstate.wait
1584
(float(client.timedelta_to_milliseconds(delay)
1585
/ 1000)))
1586
client.changedstate.release()
1587
time2 = datetime.datetime.now()
1588
if (time2 - time) >= delay:
1589
if not client.approved_by_default:
1590
logger.warning("Client %s timed out while"
1591
" waiting for approval",
1592
client.name)
1593
if self.server.use_dbus:
1594
# Emit D-Bus signal
1595
client.Rejected("Approval timed out")
1596
return
1597
else:
1598
break
1599
else:
1600
delay -= time2 - time
1601
1602
sent_size = 0
1603
while sent_size < len(client.secret):
1604
try:
1605
sent = session.send(client.secret[sent_size:])
1606
except gnutls.errors.GNUTLSError as error:
1607
logger.warning("gnutls send failed")
1608
return
1609
logger.debug("Sent: %d, remaining: %d",
1610
sent, len(client.secret)
1611
- (sent_size + sent))
1612
sent_size += sent
1613
1614
logger.info("Sending secret to %s", client.name)
1615
# bump the timeout using extended_timeout
1616
client.checked_ok(client.extended_timeout)
1617
if self.server.use_dbus:
1618
# Emit D-Bus signal
1619
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)
1620
808
1621
finally:
1622
if approval_required:
1623
client.approvals_pending -= 1
1624
try:
1625
session.bye()
1626
except gnutls.errors.GNUTLSError as error:
1627
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()
1628
833
1629
834
@staticmethod
1630
835
def peer_certificate(session):
1640
845
.gnutls_certificate_get_peers
1641
846
(session._c_object, ctypes.byref(list_size)))
1642
847
if not bool(cert_list) and list_size.value != 0:
1643
raise gnutls.errors.GNUTLSError("error getting peer"
1644
" certificate")
848
raise gnutls.errors.GNUTLSError(u"error getting peer"
849
u" certificate")
1645
850
if list_size.value == 0:
1646
851
return None
1647
852
cert = cert_list[0]
1673
878
if crtverify.value != 0:
1674
879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1675
880
raise (gnutls.errors.CertificateSecurityError
1676
("Verify failed"))
881
(u"Verify failed"))
1677
882
# New buffer for the fingerprint
1678
883
buf = ctypes.create_string_buffer(20)
1679
884
buf_len = ctypes.c_size_t()
1686
891
# Convert the buffer to a Python bytestring
1687
892
fpr = ctypes.string_at(buf, buf_len.value)
1688
893
# Convert the bytestring to hexadecimal notation
1689
hex_fpr = binascii.hexlify(fpr).upper()
894
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1690
895
return hex_fpr
1691
896
1692
897
1693
class MultiprocessingMixIn(object):
1694
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1695
def sub_process_main(self, request, address):
1696
try:
1697
self.finish_request(request, address)
1698
except Exception:
1699
self.handle_error(request, address)
1700
self.close_request(request)
1701
1702
def process_request(self, request, address):
1703
"""Start a new process to process the request."""
1704
proc = multiprocessing.Process(target = self.sub_process_main,
1705
args = (request,
1706
address))
1707
proc.start()
1708
return proc
1709
1710
1711
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1712
""" adds a pipe to the MixIn """
898
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
899
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1713
900
def process_request(self, request, client_address):
1714
901
"""Overrides and wraps the original process_request().
1715
902
1716
This function creates a new pipe in self.pipe
903
This function creates a new pipe in self.pipe
1717
904
"""
1718
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1719
1720
proc = MultiprocessingMixIn.process_request(self, request,
1721
client_address)
1722
self.child_pipe.close()
1723
self.add_pipe(parent_pipe, proc)
1724
1725
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):
1726
911
"""Dummy function; override as necessary"""
1727
raise NotImplementedError
1728
1729
1730
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
912
os.close(pipe)
913
914
915
class IPv6_TCPServer(ForkingMixInWithPipe,
1731
916
socketserver.TCPServer, object):
1732
917
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1733
918
1749
934
bind to an address or port if they were not specified."""
1750
935
if self.interface is not None:
1751
936
if SO_BINDTODEVICE is None:
1752
logger.error("SO_BINDTODEVICE does not exist;"
1753
" cannot bind to interface %s",
937
logger.error(u"SO_BINDTODEVICE does not exist;"
938
u" cannot bind to interface %s",
1754
939
self.interface)
1755
940
else:
1756
941
try:
1757
942
self.socket.setsockopt(socket.SOL_SOCKET,
1758
943
SO_BINDTODEVICE,
1759
944
str(self.interface
1760
+ '\0'))
1761
except socket.error as error:
945
+ u'\0'))
946
except socket.error, error:
1762
947
if error[0] == errno.EPERM:
1763
logger.error("No permission to"
1764
" bind to interface %s",
948
logger.error(u"No permission to"
949
u" bind to interface %s",
1765
950
self.interface)
1766
951
elif error[0] == errno.ENOPROTOOPT:
1767
logger.error("SO_BINDTODEVICE not available;"
1768
" cannot bind to interface %s",
952
logger.error(u"SO_BINDTODEVICE not available;"
953
u" cannot bind to interface %s",
1769
954
self.interface)
1770
955
else:
1771
956
raise
1773
958
if self.server_address[0] or self.server_address[1]:
1774
959
if not self.server_address[0]:
1775
960
if self.address_family == socket.AF_INET6:
1776
any_address = "::" # in6addr_any
961
any_address = u"::" # in6addr_any
1777
962
else:
1778
963
any_address = socket.INADDR_ANY
1779
964
self.server_address = (any_address,
1797
982
clients: set of Client objects
1798
983
gnutls_priority GnuTLS priority string
1799
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
1800
988
1801
989
Assumes a gobject.MainLoop event loop.
1802
990
"""
1806
994
self.enabled = False
1807
995
self.clients = clients
1808
996
if self.clients is None:
1809
self.clients = {}
997
self.clients = set()
1810
998
self.use_dbus = use_dbus
1811
999
self.gnutls_priority = gnutls_priority
1812
1000
IPv6_TCPServer.__init__(self, server_address,
1816
1004
def server_activate(self):
1817
1005
if self.enabled:
1818
1006
return socketserver.TCPServer.server_activate(self)
1819
1820
1007
def enable(self):
1821
1008
self.enabled = True
1822
1823
def add_pipe(self, parent_pipe, proc):
1009
def add_pipe(self, pipe):
1824
1010
# Call "handle_ipc" for both data and EOF events
1825
gobject.io_add_watch(parent_pipe.fileno(),
1826
gobject.IO_IN | gobject.IO_HUP,
1827
functools.partial(self.handle_ipc,
1828
parent_pipe =
1829
parent_pipe,
1830
proc = proc))
1831
1832
def handle_ipc(self, source, condition, parent_pipe=None,
1833
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={}):
1834
1014
condition_names = {
1835
gobject.IO_IN: "IN", # There is data to read.
1836
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
1837
1017
# blocking).
1838
gobject.IO_PRI: "PRI", # There is urgent data to read.
1839
gobject.IO_ERR: "ERR", # Error condition.
1840
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
1841
1021
# broken, usually for pipes and
1842
1022
# sockets).
1843
1023
}
1845
1025
for cond, name in
1846
1026
condition_names.iteritems()
1847
1027
if cond & condition)
1848
# error, or the other end of multiprocessing.Pipe has closed
1849
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1850
# Wait for other process to exit
1851
proc.join()
1852
return False
1853
1854
# Read a request from the child
1855
request = parent_pipe.recv()
1856
command = request[0]
1857
1858
if command == 'init':
1859
fpr = request[1]
1860
address = request[2]
1861
1862
for c in self.clients.itervalues():
1863
if c.fingerprint == fpr:
1864
client = c
1865
break
1866
else:
1867
logger.info("Client not found for fingerprint: %s, ad"
1868
"dress: %s", fpr, address)
1869
if self.use_dbus:
1870
# Emit D-Bus signal
1871
mandos_dbus_service.ClientNotFound(fpr,
1872
address[0])
1873
parent_pipe.send(False)
1874
return False
1875
1876
gobject.io_add_watch(parent_pipe.fileno(),
1877
gobject.IO_IN | gobject.IO_HUP,
1878
functools.partial(self.handle_ipc,
1879
parent_pipe =
1880
parent_pipe,
1881
proc = proc,
1882
client_object =
1883
client))
1884
parent_pipe.send(True)
1885
# remove the old hook in favor of the new above hook on
1886
# same fileno
1887
return False
1888
if command == 'funcall':
1889
funcname = request[1]
1890
args = request[2]
1891
kwargs = request[3]
1892
1893
parent_pipe.send(('data', getattr(client_object,
1894
funcname)(*args,
1895
**kwargs)))
1896
1897
if command == 'getattr':
1898
attrname = request[1]
1899
if callable(client_object.__getattribute__(attrname)):
1900
parent_pipe.send(('function',))
1901
else:
1902
parent_pipe.send(('data', client_object
1903
.__getattribute__(attrname)))
1904
1905
if command == 'setattr':
1906
attrname = request[1]
1907
value = request[2]
1908
setattr(client_object, attrname, value)
1909
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
1910
1082
return True
1911
1083
1912
1084
1913
1085
def string_to_delta(interval):
1914
1086
"""Parse a string and return a datetime.timedelta
1915
1087
1916
>>> string_to_delta('7d')
1088
>>> string_to_delta(u'7d')
1917
1089
datetime.timedelta(7)
1918
>>> string_to_delta('60s')
1090
>>> string_to_delta(u'60s')
1919
1091
datetime.timedelta(0, 60)
1920
>>> string_to_delta('60m')
1092
>>> string_to_delta(u'60m')
1921
1093
datetime.timedelta(0, 3600)
1922
>>> string_to_delta('24h')
1094
>>> string_to_delta(u'24h')
1923
1095
datetime.timedelta(1)
1924
>>> string_to_delta('1w')
1096
>>> string_to_delta(u'1w')
1925
1097
datetime.timedelta(7)
1926
>>> string_to_delta('5m 30s')
1098
>>> string_to_delta(u'5m 30s')
1927
1099
datetime.timedelta(0, 330)
1928
1100
"""
1929
1101
timevalue = datetime.timedelta(0)
1931
1103
try:
1932
1104
suffix = unicode(s[-1])
1933
1105
value = int(s[:-1])
1934
if suffix == "d":
1106
if suffix == u"d":
1935
1107
delta = datetime.timedelta(value)
1936
elif suffix == "s":
1108
elif suffix == u"s":
1937
1109
delta = datetime.timedelta(0, value)
1938
elif suffix == "m":
1110
elif suffix == u"m":
1939
1111
delta = datetime.timedelta(0, 0, 0, 0, value)
1940
elif suffix == "h":
1112
elif suffix == u"h":
1941
1113
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1942
elif suffix == "w":
1114
elif suffix == u"w":
1943
1115
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1944
1116
else:
1945
raise ValueError("Unknown suffix %r" % suffix)
1946
except (ValueError, IndexError) as e:
1947
raise ValueError(*(e.args))
1117
raise ValueError
1118
except (ValueError, IndexError):
1119
raise ValueError
1948
1120
timevalue += delta
1949
1121
return timevalue
1950
1122
1951
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
1952
1148
def daemon(nochdir = False, noclose = False):
1953
1149
"""See daemon(3). Standard BSD Unix function.
1954
1150
1957
1153
sys.exit()
1958
1154
os.setsid()
1959
1155
if not nochdir:
1960
os.chdir("/")
1156
os.chdir(u"/")
1961
1157
if os.fork():
1962
1158
sys.exit()
1963
1159
if not noclose:
1965
1161
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1966
1162
if not stat.S_ISCHR(os.fstat(null).st_mode):
1967
1163
raise OSError(errno.ENODEV,
1968
"%s not a character device"
1969
% os.path.devnull)
1164
u"/dev/null not a character device")
1970
1165
os.dup2(null, sys.stdin.fileno())
1971
1166
os.dup2(null, sys.stdout.fileno())
1972
1167
os.dup2(null, sys.stderr.fileno())
1976
1171
1977
1172
def main():
1978
1173
1979
##################################################################
1174
######################################################################
1980
1175
# Parsing of options, both command line and config file
1981
1176
1982
parser = argparse.ArgumentParser()
1983
parser.add_argument("-v", "--version", action="version",
1984
version = "%%(prog)s %s" % version,
1985
help="show version number and exit")
1986
parser.add_argument("-i", "--interface", metavar="IF",
1987
help="Bind to interface IF")
1988
parser.add_argument("-a", "--address",
1989
help="Address to listen for requests on")
1990
parser.add_argument("-p", "--port", type=int,
1991
help="Port number to receive requests on")
1992
parser.add_argument("--check", action="store_true",
1993
help="Run self-test")
1994
parser.add_argument("--debug", action="store_true",
1995
help="Debug mode; run in foreground and log"
1996
" to terminal")
1997
parser.add_argument("--debuglevel", metavar="LEVEL",
1998
help="Debug level for stdout output")
1999
parser.add_argument("--priority", help="GnuTLS"
2000
" priority string (see GnuTLS documentation)")
2001
parser.add_argument("--servicename",
2002
metavar="NAME", help="Zeroconf service name")
2003
parser.add_argument("--configdir",
2004
default="/etc/mandos", metavar="DIR",
2005
help="Directory to search for configuration"
2006
" files")
2007
parser.add_argument("--no-dbus", action="store_false",
2008
dest="use_dbus", help="Do not provide D-Bus"
2009
" system bus interface")
2010
parser.add_argument("--no-ipv6", action="store_false",
2011
dest="use_ipv6", help="Do not use IPv6")
2012
parser.add_argument("--no-restore", action="store_false",
2013
dest="restore", help="Do not restore stored"
2014
" state")
2015
parser.add_argument("--statedir", metavar="DIR",
2016
help="Directory to save/restore state in")
2017
2018
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]
2019
1203
2020
1204
if options.check:
2021
1205
import doctest
2023
1207
sys.exit()
2024
1208
2025
1209
# Default values for config file for server-global settings
2026
server_defaults = { "interface": "",
2027
"address": "",
2028
"port": "",
2029
"debug": "False",
2030
"priority":
2031
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2032
"servicename": "Mandos",
2033
"use_dbus": "True",
2034
"use_ipv6": "True",
2035
"debuglevel": "",
2036
"restore": "True",
2037
"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",
2038
1219
}
2039
1220
2040
1221
# Parse config file for server-global settings
2041
1222
server_config = configparser.SafeConfigParser(server_defaults)
2042
1223
del server_defaults
2043
1224
server_config.read(os.path.join(options.configdir,
2044
"mandos.conf"))
1225
u"mandos.conf"))
2045
1226
# Convert the SafeConfigParser object to a dict
2046
1227
server_settings = server_config.defaults()
2047
1228
# Use the appropriate methods on the non-string config options
2048
for option in ("debug", "use_dbus", "use_ipv6"):
2049
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",
2050
1231
option)
2051
1232
if server_settings["port"]:
2052
server_settings["port"] = server_config.getint("DEFAULT",
2053
"port")
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
2054
1235
del server_config
2055
1236
2056
1237
# Override the settings from the config file with command line
2057
1238
# options, if set.
2058
for option in ("interface", "address", "port", "debug",
2059
"priority", "servicename", "configdir",
2060
"use_dbus", "use_ipv6", "debuglevel", "restore",
2061
"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"):
2062
1242
value = getattr(options, option)
2063
1243
if value is not None:
2064
1244
server_settings[option] = value
2072
1252
##################################################################
2073
1253
2074
1254
# For convenience
2075
debug = server_settings["debug"]
2076
debuglevel = server_settings["debuglevel"]
2077
use_dbus = server_settings["use_dbus"]
2078
use_ipv6 = server_settings["use_ipv6"]
2079
stored_state_path = os.path.join(server_settings["statedir"],
2080
stored_state_file)
2081
2082
if debug:
2083
initlogger(debug, logging.DEBUG)
2084
else:
2085
if not debuglevel:
2086
initlogger(debug)
2087
else:
2088
level = getattr(logging, debuglevel.upper())
2089
initlogger(debug, level)
2090
2091
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":
2092
1264
syslogger.setFormatter(logging.Formatter
2093
('Mandos (%s) [%%(process)d]:'
2094
' %%(levelname)s: %%(message)s'
2095
% server_settings["servicename"]))
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
2096
1268
2097
1269
# Parse config file with clients
2098
client_config = configparser.SafeConfigParser(Client.client_defaults)
2099
client_config.read(os.path.join(server_settings["configdir"],
2100
"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"))
2101
1278
2102
1279
global mandos_dbus_service
2103
1280
mandos_dbus_service = None
2104
1281
2105
tcp_server = MandosServer((server_settings["address"],
2106
server_settings["port"]),
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
2107
1284
ClientHandler,
2108
interface=(server_settings["interface"]
2109
or None),
1285
interface=server_settings[u"interface"],
2110
1286
use_ipv6=use_ipv6,
2111
1287
gnutls_priority=
2112
server_settings["priority"],
1288
server_settings[u"priority"],
2113
1289
use_dbus=use_dbus)
2114
if not debug:
2115
pidfilename = "/var/run/mandos.pid"
2116
try:
2117
pidfile = open(pidfilename, "w")
2118
except IOError:
2119
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)
2120
1295
2121
1296
try:
2122
uid = pwd.getpwnam("_mandos").pw_uid
2123
gid = pwd.getpwnam("_mandos").pw_gid
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
2124
1299
except KeyError:
2125
1300
try:
2126
uid = pwd.getpwnam("mandos").pw_uid
2127
gid = pwd.getpwnam("mandos").pw_gid
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
2128
1303
except KeyError:
2129
1304
try:
2130
uid = pwd.getpwnam("nobody").pw_uid
2131
gid = pwd.getpwnam("nobody").pw_gid
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
2132
1307
except KeyError:
2133
1308
uid = 65534
2134
1309
gid = 65534
2135
1310
try:
2136
1311
os.setgid(gid)
2137
1312
os.setuid(uid)
2138
except OSError as error:
1313
except OSError, error:
2139
1314
if error[0] != errno.EPERM:
2140
1315
raise error
2141
1316
1317
# Enable all possible GnuTLS debugging
2142
1318
if debug:
2143
# Enable all possible GnuTLS debugging
2144
2145
1319
# "Use a log level over 10 to enable all debugging options."
2146
1320
# - GnuTLS manual
2147
1321
gnutls.library.functions.gnutls_global_set_log_level(11)
2148
1322
2149
1323
@gnutls.library.types.gnutls_log_func
2150
1324
def debug_gnutls(level, string):
2151
logger.debug("GnuTLS: %s", string[:-1])
1325
logger.debug(u"GnuTLS: %s", string[:-1])
2152
1326
2153
1327
(gnutls.library.functions
2154
1328
.gnutls_global_set_log_function(debug_gnutls))
2155
2156
# Redirect stdin so all checkers get /dev/null
2157
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2158
os.dup2(null, sys.stdin.fileno())
2159
if null > 2:
2160
os.close(null)
2161
2162
# Need to fork before connecting to D-Bus
2163
if not debug:
2164
# Close all input and output, do double fork, etc.
2165
daemon()
2166
2167
gobject.threads_init()
2168
1329
2169
1330
global main_loop
2170
1331
# From the Avahi example code
2173
1334
bus = dbus.SystemBus()
2174
1335
# End of Avahi example code
2175
1336
if use_dbus:
2176
try:
2177
bus_name = dbus.service.BusName("se.recompile.Mandos",
2178
bus, do_not_queue=True)
2179
old_bus_name = (dbus.service.BusName
2180
("se.bsnet.fukt.Mandos", bus,
2181
do_not_queue=True))
2182
except dbus.exceptions.NameExistsException as e:
2183
logger.error(unicode(e) + ", disabling D-Bus")
2184
use_dbus = False
2185
server_settings["use_dbus"] = False
2186
tcp_server.use_dbus = False
1337
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2187
1338
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2188
service = AvahiServiceToSyslog(name =
2189
server_settings["servicename"],
2190
servicetype = "_mandos._tcp",
2191
protocol = protocol, bus = bus)
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
2192
1342
if server_settings["interface"]:
2193
1343
service.interface = (if_nametoindex
2194
(str(server_settings["interface"])))
2195
2196
global multiprocessing_manager
2197
multiprocessing_manager = multiprocessing.Manager()
1344
(str(server_settings[u"interface"])))
2198
1345
2199
1346
client_class = Client
2200
1347
if use_dbus:
2201
client_class = functools.partial(ClientDBusTransitional,
2202
bus = bus)
2203
2204
client_settings = Client.config_parser(client_config)
2205
old_client_settings = {}
2206
clients_data = {}
2207
2208
# Get client data and settings from last running state.
2209
if server_settings["restore"]:
2210
try:
2211
with open(stored_state_path, "rb") as stored_state:
2212
clients_data, old_client_settings = (pickle.load
2213
(stored_state))
2214
os.remove(stored_state_path)
2215
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2217
.format(e))
2218
if e.errno != errno.ENOENT:
2219
raise
2220
except EOFError as e:
2221
logger.warning("Could not load persistent state: "
2222
"EOFError: {0}".format(e))
2223
2224
with PGPEngine() as pgp:
2225
for client_name, client in clients_data.iteritems():
2226
# Decide which value to use after restoring saved state.
2227
# We have three different values: Old config file,
2228
# new config file, and saved state.
2229
# New config value takes precedence if it differs from old
2230
# config value, otherwise use saved state.
2231
for name, value in client_settings[client_name].items():
2232
try:
2233
# For each value in new config, check if it
2234
# differs from the old config value (Except for
2235
# the "secret" attribute)
2236
if (name != "secret" and
2237
value != old_client_settings[client_name]
2238
[name]):
2239
client[name] = value
2240
except KeyError:
2241
pass
2242
2243
# Clients who has passed its expire date can still be
2244
# enabled if its last checker was successful. Clients
2245
# whose checker failed before we stored its state is
2246
# assumed to have failed all checkers during downtime.
2247
if client["enabled"]:
2248
if datetime.datetime.utcnow() >= client["expires"]:
2249
if not client["last_checked_ok"]:
2250
logger.warning(
2251
"disabling client {0} - Client never "
2252
"performed a successfull checker"
2253
.format(client["name"]))
2254
client["enabled"] = False
2255
elif client["last_checker_status"] != 0:
2256
logger.warning(
2257
"disabling client {0} - Client "
2258
"last checker failed with error code {1}"
2259
.format(client["name"],
2260
client["last_checker_status"]))
2261
client["enabled"] = False
2262
else:
2263
client["expires"] = (datetime.datetime
2264
.utcnow()
2265
+ client["timeout"])
2266
2267
try:
2268
client["secret"] = (
2269
pgp.decrypt(client["encrypted_secret"],
2270
client_settings[client_name]
2271
["secret"]))
2272
except PGPError:
2273
# If decryption fails, we use secret from new settings
2274
logger.debug("Failed to decrypt {0} old secret"
2275
.format(client_name))
2276
client["secret"] = (
2277
client_settings[client_name]["secret"])
2278
2279
2280
# Add/remove clients based on new changes made to config
2281
for client_name in set(old_client_settings) - set(client_settings):
2282
del clients_data[client_name]
2283
for client_name in set(client_settings) - set(old_client_settings):
2284
clients_data[client_name] = client_settings[client_name]
2285
2286
# Create clients all clients
2287
for client_name, client in clients_data.iteritems():
2288
tcp_server.clients[client_name] = client_class(
2289
name = client_name, settings = client)
2290
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()))
2291
1353
if not tcp_server.clients:
2292
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()
2293
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
2294
1392
if not debug:
2295
try:
2296
with pidfile:
2297
pid = os.getpid()
2298
pidfile.write(str(pid) + "\n".encode("utf-8"))
2299
del pidfile
2300
except IOError:
2301
logger.error("Could not write to file %r with PID %d",
2302
pidfilename, pid)
2303
except NameError:
2304
# "pidfile" was never created
2305
pass
2306
del pidfilename
2307
1393
signal.signal(signal.SIGINT, signal.SIG_IGN)
2308
2309
1394
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2310
1395
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2311
1396
2313
1398
class MandosDBusService(dbus.service.Object):
2314
1399
"""A D-Bus proxy object"""
2315
1400
def __init__(self):
2316
dbus.service.Object.__init__(self, bus, "/")
2317
_interface = "se.recompile.Mandos"
2318
2319
@dbus.service.signal(_interface, signature="o")
2320
def ClientAdded(self, objpath):
2321
"D-Bus signal"
2322
pass
2323
2324
@dbus.service.signal(_interface, signature="ss")
2325
def ClientNotFound(self, fingerprint, address):
2326
"D-Bus signal"
2327
pass
2328
2329
@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")
2330
1415
def ClientRemoved(self, objpath, name):
2331
1416
"D-Bus signal"
2332
1417
pass
2333
1418
2334
@dbus.service.method(_interface, out_signature="ao")
1419
@dbus.service.method(_interface, out_signature=u"ao")
2335
1420
def GetAllClients(self):
2336
1421
"D-Bus method"
2337
1422
return dbus.Array(c.dbus_object_path
2338
for c in
2339
tcp_server.clients.itervalues())
1423
for c in tcp_server.clients)
2340
1424
2341
1425
@dbus.service.method(_interface,
2342
out_signature="a{oa{sv}}")
1426
out_signature=u"a{oa{sv}}")
2343
1427
def GetAllClientsWithProperties(self):
2344
1428
"D-Bus method"
2345
1429
return dbus.Dictionary(
2346
((c.dbus_object_path, c.GetAll(""))
2347
for c in tcp_server.clients.itervalues()),
2348
signature="oa{sv}")
1430
((c.dbus_object_path, c.GetAllProperties())
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
2349
1433
2350
@dbus.service.method(_interface, in_signature="o")
1434
@dbus.service.method(_interface, in_signature=u"o")
2351
1435
def RemoveClient(self, object_path):
2352
1436
"D-Bus method"
2353
for c in tcp_server.clients.itervalues():
1437
for c in tcp_server.clients:
2354
1438
if c.dbus_object_path == object_path:
2355
del tcp_server.clients[c.name]
1439
tcp_server.clients.remove(c)
2356
1440
c.remove_from_connection()
2357
1441
# Don't signal anything except ClientRemoved
2358
c.disable(quiet=True)
1442
c.disable(signal=False)
2359
1443
# Emit D-Bus signal
2360
1444
self.ClientRemoved(object_path, c.name)
2361
1445
return
2362
raise KeyError(object_path)
1446
raise KeyError
2363
1447
2364
1448
del _interface
2365
1449
2366
class MandosDBusServiceTransitional(MandosDBusService):
2367
__metaclass__ = AlternateDBusNamesMetaclass
2368
mandos_dbus_service = MandosDBusServiceTransitional()
2369
2370
def cleanup():
2371
"Cleanup function; run on exit"
2372
service.cleanup()
2373
2374
multiprocessing.active_children()
2375
if not (tcp_server.clients or client_settings):
2376
return
2377
2378
# Store client before exiting. Secrets are encrypted with key
2379
# based on what config file has. If config file is
2380
# removed/edited, old secret will thus be unrecovable.
2381
clients = {}
2382
with PGPEngine() as pgp:
2383
for client in tcp_server.clients.itervalues():
2384
key = client_settings[client.name]["secret"]
2385
client.encrypted_secret = pgp.encrypt(client.secret,
2386
key)
2387
client_dict = {}
2388
2389
# A list of attributes that can not be pickled
2390
# + secret.
2391
exclude = set(("bus", "changedstate", "secret",
2392
"checker"))
2393
for name, typ in (inspect.getmembers
2394
(dbus.service.Object)):
2395
exclude.add(name)
2396
2397
client_dict["encrypted_secret"] = (client
2398
.encrypted_secret)
2399
for attr in client.client_structure:
2400
if attr not in exclude:
2401
client_dict[attr] = getattr(client, attr)
2402
2403
clients[client.name] = client_dict
2404
del client_settings[client.name]["secret"]
2405
2406
try:
2407
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2408
prefix="clients-",
2409
dir=os.path.dirname
2410
(stored_state_path))
2411
with os.fdopen(tempfd, "wb") as stored_state:
2412
pickle.dump((clients, client_settings), stored_state)
2413
os.rename(tempname, stored_state_path)
2414
except (IOError, OSError) as e:
2415
logger.warning("Could not save persistent state: {0}"
2416
.format(e))
2417
if not debug:
2418
try:
2419
os.remove(tempname)
2420
except NameError:
2421
pass
2422
if e.errno not in set((errno.ENOENT, errno.EACCES,
2423
errno.EEXIST)):
2424
raise e
2425
2426
# Delete all clients, and settings from config
2427
while tcp_server.clients:
2428
name, client = tcp_server.clients.popitem()
2429
if use_dbus:
2430
client.remove_from_connection()
2431
# Don't signal anything except ClientRemoved
2432
client.disable(quiet=True)
2433
if use_dbus:
2434
# Emit D-Bus signal
2435
mandos_dbus_service.ClientRemoved(client
2436
.dbus_object_path,
2437
client.name)
2438
client_settings.clear()
2439
2440
atexit.register(cleanup)
2441
2442
for client in tcp_server.clients.itervalues():
1450
mandos_dbus_service = MandosDBusService()
1451
1452
for client in tcp_server.clients:
2443
1453
if use_dbus:
2444
1454
# Emit D-Bus signal
2445
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2446
# Need to initiate checking of clients
2447
if client.enabled:
2448
client.init_checker()
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
1457
client.enable()
2449
1458
2450
1459
tcp_server.enable()
2451
1460
tcp_server.server_activate()
2453
1462
# Find out what port we got
2454
1463
service.port = tcp_server.socket.getsockname()[1]
2455
1464
if use_ipv6:
2456
logger.info("Now listening on address %r, port %d,"
1465
logger.info(u"Now listening on address %r, port %d,"
2457
1466
" flowinfo %d, scope_id %d"
2458
1467
% tcp_server.socket.getsockname())
2459
1468
else: # IPv4
2460
logger.info("Now listening on address %r, port %d"
1469
logger.info(u"Now listening on address %r, port %d"
2461
1470
% tcp_server.socket.getsockname())
2462
1471
2463
1472
#service.interface = tcp_server.socket.getsockname()[3]
2466
1475
# From the Avahi example code
2467
1476
try:
2468
1477
service.activate()
2469
except dbus.exceptions.DBusException as error:
2470
logger.critical("DBusException: %s", error)
2471
cleanup()
1478
except dbus.exceptions.DBusException, error:
1479
logger.critical(u"DBusException: %s", error)
2472
1480
sys.exit(1)
2473
1481
# End of Avahi example code
2474
1482
2477
1485
(tcp_server.handle_request
2478
1486
(*args[2:], **kwargs) or True))
2479
1487
2480
logger.debug("Starting main loop")
1488
logger.debug(u"Starting main loop")
2481
1489
main_loop.run()
2482
except AvahiError as error:
2483
logger.critical("AvahiError: %s", error)
2484
cleanup()
1490
except AvahiError, error:
1491
logger.critical(u"AvahiError: %s", error)
2485
1492
sys.exit(1)
2486
1493
except KeyboardInterrupt:
2487
1494
if debug:
2488
print("", file=sys.stderr)
2489
logger.debug("Server received KeyboardInterrupt")
2490
logger.debug("Server exiting")
2491
# Must run before the D-Bus bus name gets deregistered
2492
cleanup()
1495
print >> sys.stderr
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
2493
1498
2494
1499
if __name__ == '__main__':
2495
1500
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0