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- Committer: Teddy Hogeborn
- Date: 2012-01-15 21:02:37 UTC
- mfrom: (237.7.106 trunk)
- Revision ID: teddy@recompile.se-20120115210237-6mcl2zuoxyn5smr5
Merge from trunk.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
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29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
from contextlib import closing
59
import contextlib
59
60
import struct
60
61
import fcntl
61
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
62
68
63
69
import dbus
64
70
import dbus.service
67
73
from dbus.mainloop.glib import DBusGMainLoop
68
74
import ctypes
69
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
70
79
71
80
try:
72
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
85
except ImportError:
77
86
SO_BINDTODEVICE = None
78
87
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
88
version = "1.5.2"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
83
92
syslogger = (logging.handlers.SysLogHandler
84
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(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
96
211
97
212
class AvahiError(Exception):
98
213
def __init__(self, value, *args, **kwargs):
114
229
Attributes:
115
230
interface: integer; avahi.IF_UNSPEC or an interface index.
116
231
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
119
234
See <http://www.dns-sd.org/ServiceTypes.html>
120
235
port: integer; what port to announce
121
236
TXT: list of strings; TXT record for the service
130
245
"""
131
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
247
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
248
domain = "", host = "", max_renames = 32768,
134
249
protocol = avahi.PROTO_UNSPEC, bus = None):
135
250
self.interface = interface
136
251
self.name = name
145
260
self.group = None # our entry group
146
261
self.server = None
147
262
self.bus = bus
263
self.entry_group_state_changed_match = None
148
264
def rename(self):
149
265
"""Derived from the Avahi example code"""
150
266
if self.rename_count >= self.max_renames:
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
153
269
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
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)
162
275
self.remove()
163
self.add()
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)
164
282
self.rename_count += 1
165
283
def remove(self):
166
284
"""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
167
288
if self.group is not None:
168
289
self.group.Reset()
169
290
def add(self):
170
291
"""Derived from the Avahi example code"""
292
self.remove()
171
293
if self.group is None:
172
294
self.group = dbus.Interface(
173
295
self.bus.get_object(avahi.DBUS_NAME,
174
296
self.server.EntryGroupNew()),
175
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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' ...",
179
302
self.name, self.type)
180
303
self.group.AddService(
181
304
self.interface,
188
311
self.group.Commit()
189
312
def entry_group_state_changed(self, state, error):
190
313
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
314
logger.debug("Avahi entry group state change: %i", state)
192
315
193
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
317
logger.debug("Zeroconf service established.")
195
318
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
319
logger.info("Zeroconf service name collision.")
197
320
self.rename()
198
321
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
322
logger.critical("Avahi: Error in group state changed %s",
200
323
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
324
raise AvahiGroupError("State changed: %s"
202
325
% unicode(error))
203
326
def cleanup(self):
204
327
"""Derived from the Avahi example code"""
205
328
if self.group is not None:
206
self.group.Free()
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
207
334
self.group = None
208
def server_state_changed(self, state):
335
self.remove()
336
def server_state_changed(self, state, error=None):
209
337
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
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()
213
353
elif state == avahi.SERVER_RUNNING:
214
354
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)
215
360
def activate(self):
216
361
"""Derived from the Avahi example code"""
217
362
if self.server is None:
218
363
self.server = dbus.Interface(
219
364
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
221
367
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
368
self.server.connect_to_signal("StateChanged",
223
369
self.server_state_changed)
224
370
self.server_state_changed(self.server.GetState())
225
371
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
226
381
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
227
388
class Client(object):
228
389
"""A representation of a client host served by this server.
229
390
230
391
Attributes:
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)
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
245
395
checker: subprocess.Popen(); a running checker process used
246
396
to see if the client lives.
247
397
'None' if no process is running.
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
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
253
401
runtime with vars(self) as dict, so that for
254
402
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
255
407
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, -2 means no checker completed yet.
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 secret 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
256
429
"""
257
430
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))
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
}
264
445
265
446
def timeout_milliseconds(self):
266
447
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
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)
268
453
269
454
def interval_milliseconds(self):
270
455
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
456
return timedelta_to_milliseconds(self.interval)
272
457
273
def __init__(self, name = None, disable_hook=None, config=None):
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
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
274
510
"""Note: the 'checker' key in 'config' sets the
275
511
'checker_command' attribute and *not* the 'checker'
276
512
attribute."""
277
513
self.name = name
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
281
529
# Uppercase and remove spaces from fingerprint for later
282
530
# comparison purposes with return value from the fingerprint()
283
531
# function
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
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
305
537
self.checker = None
306
538
self.checker_initiator_tag = None
307
539
self.disable_initiator_tag = None
308
540
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
541
self.current_checker_command = None
311
self.last_connect = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
312
563
313
564
def enable(self):
314
565
"""Start this client's checker and timeout hooks"""
566
if getattr(self, "enabled", False):
567
# Already enabled
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
315
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
316
599
# Schedule a new checker to be started an 'interval' from now,
317
600
# and every interval from then on.
318
601
self.checker_initiator_tag = (gobject.timeout_add
319
602
(self.interval_milliseconds(),
320
603
self.start_checker))
321
# Also start a new checker *right now*.
322
self.start_checker()
323
604
# Schedule a disable() when 'timeout' has passed
324
605
self.disable_initiator_tag = (gobject.timeout_add
325
606
(self.timeout_milliseconds(),
326
607
self.disable))
327
self.enabled = True
328
329
def disable(self):
330
"""Disable this client."""
331
if not getattr(self, "enabled", False):
332
return False
333
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
335
gobject.source_remove(self.disable_initiator_tag)
336
self.disable_initiator_tag = None
337
if getattr(self, u"checker_initiator_tag", False):
338
gobject.source_remove(self.checker_initiator_tag)
339
self.checker_initiator_tag = None
340
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
344
# Do not run this again if called by a gobject.timeout_add
345
return False
346
347
def __del__(self):
348
self.disable_hook = None
349
self.disable()
608
# Also start a new checker *right now*.
609
self.start_checker()
350
610
351
611
def checker_callback(self, pid, condition, command):
352
612
"""The checker has completed, so take appropriate actions."""
353
613
self.checker_callback_tag = None
354
614
self.checker = None
355
615
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
logger.info(u"Checker for %(name)s succeeded",
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
359
619
vars(self))
360
620
self.checked_ok()
361
621
else:
362
logger.info(u"Checker for %(name)s failed",
622
logger.info("Checker for %(name)s failed",
363
623
vars(self))
364
624
else:
365
logger.warning(u"Checker for %(name)s crashed?",
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
366
627
vars(self))
367
628
368
629
def checked_ok(self):
369
"""Bump up the timeout for this client.
370
371
This should only be called when the client has been seen,
372
alive and well.
373
"""
630
"""Assert that the client has been seen, alive and well."""
374
631
self.last_checked_ok = datetime.datetime.utcnow()
375
gobject.source_remove(self.disable_initiator_tag)
376
self.disable_initiator_tag = (gobject.timeout_add
377
(self.timeout_milliseconds(),
378
self.disable))
632
self.last_checker_status = 0
633
self.bump_timeout()
634
635
def bump_timeout(self, timeout=None):
636
"""Bump up the timeout for this client."""
637
if timeout is None:
638
timeout = self.timeout
639
if self.disable_initiator_tag is not None:
640
gobject.source_remove(self.disable_initiator_tag)
641
if getattr(self, "enabled", False):
642
self.disable_initiator_tag = (gobject.timeout_add
643
(timedelta_to_milliseconds
644
(timeout), self.disable))
645
self.expires = datetime.datetime.utcnow() + timeout
646
647
def need_approval(self):
648
self.last_approval_request = datetime.datetime.utcnow()
379
649
380
650
def start_checker(self):
381
651
"""Start a new checker subprocess if one is not running.
388
658
# client would inevitably timeout, since no checker would get
389
659
# a chance to run to completion. If we instead leave running
390
660
# checkers alone, the checker would have to take more time
391
# than 'timeout' for the client to be declared invalid, which
392
# is as it should be.
661
# than 'timeout' for the client to be disabled, which is as it
662
# should be.
393
663
394
664
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
665
try:
396
666
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
667
except (AttributeError, OSError) as error:
668
if (isinstance(error, OSError)
669
and error.errno != errno.ECHILD):
670
raise error
671
else:
397
672
if pid:
398
logger.warning(u"Checker was a zombie")
673
logger.warning("Checker was a zombie")
399
674
gobject.source_remove(self.checker_callback_tag)
400
675
self.checker_callback(pid, status,
401
676
self.current_checker_command)
406
681
command = self.checker_command % self.host
407
682
except TypeError:
408
683
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
413
for key, val in
414
vars(self).iteritems())
684
escaped_attrs = dict(
685
(attr,
686
re.escape(unicode(str(getattr(self, attr, "")),
687
errors=
688
'replace')))
689
for attr in
690
self.runtime_expansions)
691
415
692
try:
416
693
command = self.checker_command % escaped_attrs
417
except TypeError, error:
418
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
694
except TypeError as error:
695
logger.error('Could not format string "%s":'
696
' %s', self.checker_command, error)
420
697
return True # Try again later
421
698
self.current_checker_command = command
422
699
try:
423
logger.info(u"Starting checker %r for %s",
700
logger.info("Starting checker %r for %s",
424
701
command, self.name)
425
702
# We don't need to redirect stdout and stderr, since
426
703
# in normal mode, that is already done by daemon(),
428
705
# always replaced by /dev/null.)
429
706
self.checker = subprocess.Popen(command,
430
707
close_fds=True,
431
shell=True, cwd=u"/")
708
shell=True, cwd="/")
432
709
self.checker_callback_tag = (gobject.child_watch_add
433
710
(self.checker.pid,
434
711
self.checker_callback,
439
716
if pid:
440
717
gobject.source_remove(self.checker_callback_tag)
441
718
self.checker_callback(pid, status, command)
442
except OSError, error:
443
logger.error(u"Failed to start subprocess: %s",
719
except OSError as error:
720
logger.error("Failed to start subprocess: %s",
444
721
error)
445
722
# Re-run this periodically if run by gobject.timeout_add
446
723
return True
450
727
if self.checker_callback_tag:
451
728
gobject.source_remove(self.checker_callback_tag)
452
729
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
730
if getattr(self, "checker", None) is None:
454
731
return
455
logger.debug(u"Stopping checker for %(name)s", vars(self))
732
logger.debug("Stopping checker for %(name)s", vars(self))
456
733
try:
457
734
os.kill(self.checker.pid, signal.SIGTERM)
458
#os.sleep(0.5)
735
#time.sleep(0.5)
459
736
#if self.checker.poll() is None:
460
737
# os.kill(self.checker.pid, signal.SIGKILL)
461
except OSError, error:
738
except OSError as error:
462
739
if error.errno != errno.ESRCH: # No such process
463
740
raise
464
741
self.checker = None
465
466
def still_valid(self):
467
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
469
return False
470
now = datetime.datetime.utcnow()
471
if self.last_checked_ok is None:
472
return now < (self.created + self.timeout)
473
else:
474
return now < (self.last_checked_ok + self.timeout)
475
476
477
class ClientDBus(Client, dbus.service.Object):
742
743
744
def dbus_service_property(dbus_interface, signature="v",
745
access="readwrite", byte_arrays=False):
746
"""Decorators for marking methods of a DBusObjectWithProperties to
747
become properties on the D-Bus.
748
749
The decorated method will be called with no arguments by "Get"
750
and with one argument by "Set".
751
752
The parameters, where they are supported, are the same as
753
dbus.service.method, except there is only "signature", since the
754
type from Get() and the type sent to Set() is the same.
755
"""
756
# Encoding deeply encoded byte arrays is not supported yet by the
757
# "Set" method, so we fail early here:
758
if byte_arrays and signature != "ay":
759
raise ValueError("Byte arrays not supported for non-'ay'"
760
" signature %r" % signature)
761
def decorator(func):
762
func._dbus_is_property = True
763
func._dbus_interface = dbus_interface
764
func._dbus_signature = signature
765
func._dbus_access = access
766
func._dbus_name = func.__name__
767
if func._dbus_name.endswith("_dbus_property"):
768
func._dbus_name = func._dbus_name[:-14]
769
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
770
return func
771
return decorator
772
773
774
class DBusPropertyException(dbus.exceptions.DBusException):
775
"""A base class for D-Bus property-related exceptions
776
"""
777
def __unicode__(self):
778
return unicode(str(self))
779
780
781
class DBusPropertyAccessException(DBusPropertyException):
782
"""A property's access permissions disallows an operation.
783
"""
784
pass
785
786
787
class DBusPropertyNotFound(DBusPropertyException):
788
"""An attempt was made to access a non-existing property.
789
"""
790
pass
791
792
793
class DBusObjectWithProperties(dbus.service.Object):
794
"""A D-Bus object with properties.
795
796
Classes inheriting from this can use the dbus_service_property
797
decorator to expose methods as D-Bus properties. It exposes the
798
standard Get(), Set(), and GetAll() methods on the D-Bus.
799
"""
800
801
@staticmethod
802
def _is_dbus_property(obj):
803
return getattr(obj, "_dbus_is_property", False)
804
805
def _get_all_dbus_properties(self):
806
"""Returns a generator of (name, attribute) pairs
807
"""
808
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
809
for cls in self.__class__.__mro__
810
for name, prop in
811
inspect.getmembers(cls, self._is_dbus_property))
812
813
def _get_dbus_property(self, interface_name, property_name):
814
"""Returns a bound method if one exists which is a D-Bus
815
property with the specified name and interface.
816
"""
817
for cls in self.__class__.__mro__:
818
for name, value in (inspect.getmembers
819
(cls, self._is_dbus_property)):
820
if (value._dbus_name == property_name
821
and value._dbus_interface == interface_name):
822
return value.__get__(self)
823
824
# No such property
825
raise DBusPropertyNotFound(self.dbus_object_path + ":"
826
+ interface_name + "."
827
+ property_name)
828
829
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
830
out_signature="v")
831
def Get(self, interface_name, property_name):
832
"""Standard D-Bus property Get() method, see D-Bus standard.
833
"""
834
prop = self._get_dbus_property(interface_name, property_name)
835
if prop._dbus_access == "write":
836
raise DBusPropertyAccessException(property_name)
837
value = prop()
838
if not hasattr(value, "variant_level"):
839
return value
840
return type(value)(value, variant_level=value.variant_level+1)
841
842
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
843
def Set(self, interface_name, property_name, value):
844
"""Standard D-Bus property Set() method, see D-Bus standard.
845
"""
846
prop = self._get_dbus_property(interface_name, property_name)
847
if prop._dbus_access == "read":
848
raise DBusPropertyAccessException(property_name)
849
if prop._dbus_get_args_options["byte_arrays"]:
850
# The byte_arrays option is not supported yet on
851
# signatures other than "ay".
852
if prop._dbus_signature != "ay":
853
raise ValueError
854
value = dbus.ByteArray(b''.join(chr(byte)
855
for byte in value))
856
prop(value)
857
858
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
859
out_signature="a{sv}")
860
def GetAll(self, interface_name):
861
"""Standard D-Bus property GetAll() method, see D-Bus
862
standard.
863
864
Note: Will not include properties with access="write".
865
"""
866
properties = {}
867
for name, prop in self._get_all_dbus_properties():
868
if (interface_name
869
and interface_name != prop._dbus_interface):
870
# Interface non-empty but did not match
871
continue
872
# Ignore write-only properties
873
if prop._dbus_access == "write":
874
continue
875
value = prop()
876
if not hasattr(value, "variant_level"):
877
properties[name] = value
878
continue
879
properties[name] = type(value)(value, variant_level=
880
value.variant_level+1)
881
return dbus.Dictionary(properties, signature="sv")
882
883
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
884
out_signature="s",
885
path_keyword='object_path',
886
connection_keyword='connection')
887
def Introspect(self, object_path, connection):
888
"""Standard D-Bus method, overloaded to insert property tags.
889
"""
890
xmlstring = dbus.service.Object.Introspect(self, object_path,
891
connection)
892
try:
893
document = xml.dom.minidom.parseString(xmlstring)
894
def make_tag(document, name, prop):
895
e = document.createElement("property")
896
e.setAttribute("name", name)
897
e.setAttribute("type", prop._dbus_signature)
898
e.setAttribute("access", prop._dbus_access)
899
return e
900
for if_tag in document.getElementsByTagName("interface"):
901
for tag in (make_tag(document, name, prop)
902
for name, prop
903
in self._get_all_dbus_properties()
904
if prop._dbus_interface
905
== if_tag.getAttribute("name")):
906
if_tag.appendChild(tag)
907
# Add the names to the return values for the
908
# "org.freedesktop.DBus.Properties" methods
909
if (if_tag.getAttribute("name")
910
== "org.freedesktop.DBus.Properties"):
911
for cn in if_tag.getElementsByTagName("method"):
912
if cn.getAttribute("name") == "Get":
913
for arg in cn.getElementsByTagName("arg"):
914
if (arg.getAttribute("direction")
915
== "out"):
916
arg.setAttribute("name", "value")
917
elif cn.getAttribute("name") == "GetAll":
918
for arg in cn.getElementsByTagName("arg"):
919
if (arg.getAttribute("direction")
920
== "out"):
921
arg.setAttribute("name", "props")
922
xmlstring = document.toxml("utf-8")
923
document.unlink()
924
except (AttributeError, xml.dom.DOMException,
925
xml.parsers.expat.ExpatError) as error:
926
logger.error("Failed to override Introspection method",
927
error)
928
return xmlstring
929
930
931
def datetime_to_dbus (dt, variant_level=0):
932
"""Convert a UTC datetime.datetime() to a D-Bus type."""
933
if dt is None:
934
return dbus.String("", variant_level = variant_level)
935
return dbus.String(dt.isoformat(),
936
variant_level=variant_level)
937
938
939
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
.__metaclass__):
941
"""Applied to an empty subclass of a D-Bus object, this metaclass
942
will add additional D-Bus attributes matching a certain pattern.
943
"""
944
def __new__(mcs, name, bases, attr):
945
# Go through all the base classes which could have D-Bus
946
# methods, signals, or properties in them
947
for base in (b for b in bases
948
if issubclass(b, dbus.service.Object)):
949
# Go though all attributes of the base class
950
for attrname, attribute in inspect.getmembers(base):
951
# Ignore non-D-Bus attributes, and D-Bus attributes
952
# with the wrong interface name
953
if (not hasattr(attribute, "_dbus_interface")
954
or not attribute._dbus_interface
955
.startswith("se.recompile.Mandos")):
956
continue
957
# Create an alternate D-Bus interface name based on
958
# the current name
959
alt_interface = (attribute._dbus_interface
960
.replace("se.recompile.Mandos",
961
"se.bsnet.fukt.Mandos"))
962
# Is this a D-Bus signal?
963
if getattr(attribute, "_dbus_is_signal", False):
964
# Extract the original non-method function by
965
# black magic
966
nonmethod_func = (dict(
967
zip(attribute.func_code.co_freevars,
968
attribute.__closure__))["func"]
969
.cell_contents)
970
# Create a new, but exactly alike, function
971
# object, and decorate it to be a new D-Bus signal
972
# with the alternate D-Bus interface name
973
new_function = (dbus.service.signal
974
(alt_interface,
975
attribute._dbus_signature)
976
(types.FunctionType(
977
nonmethod_func.func_code,
978
nonmethod_func.func_globals,
979
nonmethod_func.func_name,
980
nonmethod_func.func_defaults,
981
nonmethod_func.func_closure)))
982
# Define a creator of a function to call both the
983
# old and new functions, so both the old and new
984
# signals gets sent when the function is called
985
def fixscope(func1, func2):
986
"""This function is a scope container to pass
987
func1 and func2 to the "call_both" function
988
outside of its arguments"""
989
def call_both(*args, **kwargs):
990
"""This function will emit two D-Bus
991
signals by calling func1 and func2"""
992
func1(*args, **kwargs)
993
func2(*args, **kwargs)
994
return call_both
995
# Create the "call_both" function and add it to
996
# the class
997
attr[attrname] = fixscope(attribute,
998
new_function)
999
# Is this a D-Bus method?
1000
elif getattr(attribute, "_dbus_is_method", False):
1001
# Create a new, but exactly alike, function
1002
# object. Decorate it to be a new D-Bus method
1003
# with the alternate D-Bus interface name. Add it
1004
# to the class.
1005
attr[attrname] = (dbus.service.method
1006
(alt_interface,
1007
attribute._dbus_in_signature,
1008
attribute._dbus_out_signature)
1009
(types.FunctionType
1010
(attribute.func_code,
1011
attribute.func_globals,
1012
attribute.func_name,
1013
attribute.func_defaults,
1014
attribute.func_closure)))
1015
# Is this a D-Bus property?
1016
elif getattr(attribute, "_dbus_is_property", False):
1017
# Create a new, but exactly alike, function
1018
# object, and decorate it to be a new D-Bus
1019
# property with the alternate D-Bus interface
1020
# name. Add it to the class.
1021
attr[attrname] = (dbus_service_property
1022
(alt_interface,
1023
attribute._dbus_signature,
1024
attribute._dbus_access,
1025
attribute
1026
._dbus_get_args_options
1027
["byte_arrays"])
1028
(types.FunctionType
1029
(attribute.func_code,
1030
attribute.func_globals,
1031
attribute.func_name,
1032
attribute.func_defaults,
1033
attribute.func_closure)))
1034
return type.__new__(mcs, name, bases, attr)
1035
1036
1037
class ClientDBus(Client, DBusObjectWithProperties):
478
1038
"""A Client class using D-Bus
479
1039
480
1040
Attributes:
481
1041
dbus_object_path: dbus.ObjectPath
482
1042
bus: dbus.SystemBus()
483
1043
"""
1044
1045
runtime_expansions = (Client.runtime_expansions
1046
+ ("dbus_object_path",))
1047
484
1048
# dbus.service.Object doesn't use super(), so we can't either.
485
1049
486
1050
def __init__(self, bus = None, *args, **kwargs):
488
1052
Client.__init__(self, *args, **kwargs)
489
1053
# Only now, when this client is initialized, can it show up on
490
1054
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1056
{ord("."): ord("_"),
1057
ord("-"): ord("_")})
491
1058
self.dbus_object_path = (dbus.ObjectPath
492
(u"/clients/"
493
+ self.name.replace(u".", u"_")))
494
dbus.service.Object.__init__(self, self.bus,
495
self.dbus_object_path)
496
497
@staticmethod
498
def _datetime_to_dbus(dt, variant_level=0):
499
"""Convert a UTC datetime.datetime() to a D-Bus type."""
500
return dbus.String(dt.isoformat(),
501
variant_level=variant_level)
502
503
def enable(self):
504
oldstate = getattr(self, u"enabled", False)
505
r = Client.enable(self)
506
if oldstate != self.enabled:
507
# Emit D-Bus signals
508
self.PropertyChanged(dbus.String(u"enabled"),
509
dbus.Boolean(True, variant_level=1))
510
self.PropertyChanged(
511
dbus.String(u"last_enabled"),
512
self._datetime_to_dbus(self.last_enabled,
513
variant_level=1))
514
return r
515
516
def disable(self, signal = True):
517
oldstate = getattr(self, u"enabled", False)
518
r = Client.disable(self)
519
if signal and oldstate != self.enabled:
520
# Emit D-Bus signal
521
self.PropertyChanged(dbus.String(u"enabled"),
522
dbus.Boolean(False, variant_level=1))
523
return r
1059
("/clients/" + client_object_name))
1060
DBusObjectWithProperties.__init__(self, self.bus,
1061
self.dbus_object_path)
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
variant_level=1):
1066
""" Modify a variable so that it's a property which announces
1067
its changes to DBus.
1068
1069
transform_fun: Function that takes a value and a variant_level
1070
and transforms it to a D-Bus type.
1071
dbus_name: D-Bus name of the variable
1072
type_func: Function that transform the value before sending it
1073
to the D-Bus. Default: no transform
1074
variant_level: D-Bus variant level. Default: 1
1075
"""
1076
attrname = "_{0}".format(dbus_name)
1077
def setter(self, value):
1078
if hasattr(self, "dbus_object_path"):
1079
if (not hasattr(self, attrname) or
1080
type_func(getattr(self, attrname, None))
1081
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
dbus_value)
1087
setattr(self, attrname, value)
1088
1089
return property(lambda self: getattr(self, attrname), setter)
1090
1091
1092
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
"ApprovalPending",
1095
type_func = bool)
1096
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1102
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
"LastCheckedOK")
1104
last_checker_status = notifychangeproperty(dbus.Int16,
1105
"LastCheckerStatus")
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1130
del notifychangeproperty
524
1131
525
1132
def __del__(self, *args, **kwargs):
526
1133
try:
527
1134
self.remove_from_connection()
528
1135
except LookupError:
529
1136
pass
530
if hasattr(dbus.service.Object, u"__del__"):
531
dbus.service.Object.__del__(self, *args, **kwargs)
1137
if hasattr(DBusObjectWithProperties, "__del__"):
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
532
1139
Client.__del__(self, *args, **kwargs)
533
1140
534
1141
def checker_callback(self, pid, condition, command,
535
1142
*args, **kwargs):
536
1143
self.checker_callback_tag = None
537
1144
self.checker = None
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"checker_running"),
540
dbus.Boolean(False, variant_level=1))
541
1145
if os.WIFEXITED(condition):
542
1146
exitstatus = os.WEXITSTATUS(condition)
543
1147
# Emit D-Bus signal
553
1157
return Client.checker_callback(self, pid, condition, command,
554
1158
*args, **kwargs)
555
1159
556
def checked_ok(self, *args, **kwargs):
557
r = Client.checked_ok(self, *args, **kwargs)
558
# Emit D-Bus signal
559
self.PropertyChanged(
560
dbus.String(u"last_checked_ok"),
561
(self._datetime_to_dbus(self.last_checked_ok,
562
variant_level=1)))
563
return r
564
565
1160
def start_checker(self, *args, **kwargs):
566
1161
old_checker = self.checker
567
1162
if self.checker is not None:
574
1169
and old_checker_pid != self.checker.pid):
575
1170
# Emit D-Bus signal
576
1171
self.CheckerStarted(self.current_checker_command)
577
self.PropertyChanged(
578
dbus.String(u"checker_running"),
579
dbus.Boolean(True, variant_level=1))
580
return r
581
582
def stop_checker(self, *args, **kwargs):
583
old_checker = getattr(self, u"checker", None)
584
r = Client.stop_checker(self, *args, **kwargs)
585
if (old_checker is not None
586
and getattr(self, u"checker", None) is None):
587
self.PropertyChanged(dbus.String(u"checker_running"),
588
dbus.Boolean(False, variant_level=1))
589
return r
590
591
## D-Bus methods & signals
592
_interface = u"se.bsnet.fukt.Mandos.Client"
593
594
# CheckedOK - method
595
@dbus.service.method(_interface)
596
def CheckedOK(self):
597
return self.checked_ok()
1172
return r
1173
1174
def _reset_approved(self):
1175
self.approved = None
1176
return False
1177
1178
def approve(self, value=True):
1179
self.send_changedstate()
1180
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
598
1190
599
1191
# CheckerCompleted - signal
600
@dbus.service.signal(_interface, signature=u"nxs")
1192
@dbus.service.signal(_interface, signature="nxs")
601
1193
def CheckerCompleted(self, exitcode, waitstatus, command):
602
1194
"D-Bus signal"
603
1195
pass
604
1196
605
1197
# CheckerStarted - signal
606
@dbus.service.signal(_interface, signature=u"s")
1198
@dbus.service.signal(_interface, signature="s")
607
1199
def CheckerStarted(self, command):
608
1200
"D-Bus signal"
609
1201
pass
610
1202
611
# GetAllProperties - method
612
@dbus.service.method(_interface, out_signature=u"a{sv}")
613
def GetAllProperties(self):
614
"D-Bus method"
615
return dbus.Dictionary({
616
dbus.String(u"name"):
617
dbus.String(self.name, variant_level=1),
618
dbus.String(u"fingerprint"):
619
dbus.String(self.fingerprint, variant_level=1),
620
dbus.String(u"host"):
621
dbus.String(self.host, variant_level=1),
622
dbus.String(u"created"):
623
self._datetime_to_dbus(self.created,
624
variant_level=1),
625
dbus.String(u"last_enabled"):
626
(self._datetime_to_dbus(self.last_enabled,
627
variant_level=1)
628
if self.last_enabled is not None
629
else dbus.Boolean(False, variant_level=1)),
630
dbus.String(u"enabled"):
631
dbus.Boolean(self.enabled, variant_level=1),
632
dbus.String(u"last_checked_ok"):
633
(self._datetime_to_dbus(self.last_checked_ok,
634
variant_level=1)
635
if self.last_checked_ok is not None
636
else dbus.Boolean (False, variant_level=1)),
637
dbus.String(u"timeout"):
638
dbus.UInt64(self.timeout_milliseconds(),
639
variant_level=1),
640
dbus.String(u"interval"):
641
dbus.UInt64(self.interval_milliseconds(),
642
variant_level=1),
643
dbus.String(u"checker"):
644
dbus.String(self.checker_command,
645
variant_level=1),
646
dbus.String(u"checker_running"):
647
dbus.Boolean(self.checker is not None,
648
variant_level=1),
649
dbus.String(u"object_path"):
650
dbus.ObjectPath(self.dbus_object_path,
651
variant_level=1)
652
}, signature=u"sv")
653
654
# IsStillValid - method
655
@dbus.service.method(_interface, out_signature=u"b")
656
def IsStillValid(self):
657
return self.still_valid()
658
659
1203
# PropertyChanged - signal
660
@dbus.service.signal(_interface, signature=u"sv")
1204
@dbus.service.signal(_interface, signature="sv")
661
1205
def PropertyChanged(self, property, value):
662
1206
"D-Bus signal"
663
1207
pass
664
1208
665
# ReceivedSecret - signal
1209
# GotSecret - signal
666
1210
@dbus.service.signal(_interface)
667
def ReceivedSecret(self):
668
"D-Bus signal"
1211
def GotSecret(self):
1212
"""D-Bus signal
1213
Is sent after a successful transfer of secret from the Mandos
1214
server to mandos-client
1215
"""
669
1216
pass
670
1217
671
1218
# Rejected - signal
672
@dbus.service.signal(_interface)
673
def Rejected(self):
1219
@dbus.service.signal(_interface, signature="s")
1220
def Rejected(self, reason):
674
1221
"D-Bus signal"
675
1222
pass
676
1223
677
# SetChecker - method
678
@dbus.service.method(_interface, in_signature=u"s")
679
def SetChecker(self, checker):
680
"D-Bus setter method"
681
self.checker_command = checker
682
# Emit D-Bus signal
683
self.PropertyChanged(dbus.String(u"checker"),
684
dbus.String(self.checker_command,
685
variant_level=1))
686
687
# SetHost - method
688
@dbus.service.method(_interface, in_signature=u"s")
689
def SetHost(self, host):
690
"D-Bus setter method"
691
self.host = host
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"host"),
694
dbus.String(self.host, variant_level=1))
695
696
# SetInterval - method
697
@dbus.service.method(_interface, in_signature=u"t")
698
def SetInterval(self, milliseconds):
699
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
700
# Emit D-Bus signal
701
self.PropertyChanged(dbus.String(u"interval"),
702
(dbus.UInt64(self.interval_milliseconds(),
703
variant_level=1)))
704
705
# SetSecret - method
706
@dbus.service.method(_interface, in_signature=u"ay",
707
byte_arrays=True)
708
def SetSecret(self, secret):
709
"D-Bus setter method"
710
self.secret = str(secret)
711
712
# SetTimeout - method
713
@dbus.service.method(_interface, in_signature=u"t")
714
def SetTimeout(self, milliseconds):
715
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
716
# Emit D-Bus signal
717
self.PropertyChanged(dbus.String(u"timeout"),
718
(dbus.UInt64(self.timeout_milliseconds(),
719
variant_level=1)))
1224
# NeedApproval - signal
1225
@dbus.service.signal(_interface, signature="tb")
1226
def NeedApproval(self, timeout, default):
1227
"D-Bus signal"
1228
return self.need_approval()
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()
720
1241
721
1242
# Enable - method
722
1243
@dbus.service.method(_interface)
741
1262
def StopChecker(self):
742
1263
self.stop_checker()
743
1264
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
# LastCheckerStatus - property
1346
@dbus_service_property(_interface, signature="n",
1347
access="read")
1348
def LastCheckerStatus_dbus_property(self):
1349
return dbus.Int16(self.last_checker_status)
1350
1351
# Expires - property
1352
@dbus_service_property(_interface, signature="s", access="read")
1353
def Expires_dbus_property(self):
1354
return datetime_to_dbus(self.expires)
1355
1356
# LastApprovalRequest - property
1357
@dbus_service_property(_interface, signature="s", access="read")
1358
def LastApprovalRequest_dbus_property(self):
1359
return datetime_to_dbus(self.last_approval_request)
1360
1361
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
1363
access="readwrite")
1364
def Timeout_dbus_property(self, value=None):
1365
if value is None: # get
1366
return dbus.UInt64(self.timeout_milliseconds())
1367
self.timeout = datetime.timedelta(0, 0, 0, value)
1368
# Reschedule timeout
1369
if self.enabled:
1370
now = datetime.datetime.utcnow()
1371
time_to_die = timedelta_to_milliseconds(
1372
(self.last_checked_ok + self.timeout) - now)
1373
if time_to_die <= 0:
1374
# The timeout has passed
1375
self.disable()
1376
else:
1377
self.expires = (now +
1378
datetime.timedelta(milliseconds =
1379
time_to_die))
1380
if (getattr(self, "disable_initiator_tag", None)
1381
is None):
1382
return
1383
gobject.source_remove(self.disable_initiator_tag)
1384
self.disable_initiator_tag = (gobject.timeout_add
1385
(time_to_die,
1386
self.disable))
1387
1388
# ExtendedTimeout - property
1389
@dbus_service_property(_interface, signature="t",
1390
access="readwrite")
1391
def ExtendedTimeout_dbus_property(self, value=None):
1392
if value is None: # get
1393
return dbus.UInt64(self.extended_timeout_milliseconds())
1394
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1395
1396
# Interval - property
1397
@dbus_service_property(_interface, signature="t",
1398
access="readwrite")
1399
def Interval_dbus_property(self, value=None):
1400
if value is None: # get
1401
return dbus.UInt64(self.interval_milliseconds())
1402
self.interval = datetime.timedelta(0, 0, 0, value)
1403
if getattr(self, "checker_initiator_tag", None) is None:
1404
return
1405
if self.enabled:
1406
# Reschedule checker run
1407
gobject.source_remove(self.checker_initiator_tag)
1408
self.checker_initiator_tag = (gobject.timeout_add
1409
(value, self.start_checker))
1410
self.start_checker() # Start one now, too
1411
1412
# Checker - property
1413
@dbus_service_property(_interface, signature="s",
1414
access="readwrite")
1415
def Checker_dbus_property(self, value=None):
1416
if value is None: # get
1417
return dbus.String(self.checker_command)
1418
self.checker_command = unicode(value)
1419
1420
# CheckerRunning - property
1421
@dbus_service_property(_interface, signature="b",
1422
access="readwrite")
1423
def CheckerRunning_dbus_property(self, value=None):
1424
if value is None: # get
1425
return dbus.Boolean(self.checker is not None)
1426
if value:
1427
self.start_checker()
1428
else:
1429
self.stop_checker()
1430
1431
# ObjectPath - property
1432
@dbus_service_property(_interface, signature="o", access="read")
1433
def ObjectPath_dbus_property(self):
1434
return self.dbus_object_path # is already a dbus.ObjectPath
1435
1436
# Secret = property
1437
@dbus_service_property(_interface, signature="ay",
1438
access="write", byte_arrays=True)
1439
def Secret_dbus_property(self, value):
1440
self.secret = str(value)
1441
744
1442
del _interface
745
1443
746
1444
1445
class ProxyClient(object):
1446
def __init__(self, child_pipe, fpr, address):
1447
self._pipe = child_pipe
1448
self._pipe.send(('init', fpr, address))
1449
if not self._pipe.recv():
1450
raise KeyError()
1451
1452
def __getattribute__(self, name):
1453
if name == '_pipe':
1454
return super(ProxyClient, self).__getattribute__(name)
1455
self._pipe.send(('getattr', name))
1456
data = self._pipe.recv()
1457
if data[0] == 'data':
1458
return data[1]
1459
if data[0] == 'function':
1460
def func(*args, **kwargs):
1461
self._pipe.send(('funcall', name, args, kwargs))
1462
return self._pipe.recv()[1]
1463
return func
1464
1465
def __setattr__(self, name, value):
1466
if name == '_pipe':
1467
return super(ProxyClient, self).__setattr__(name, value)
1468
self._pipe.send(('setattr', name, value))
1469
1470
1471
class ClientDBusTransitional(ClientDBus):
1472
__metaclass__ = AlternateDBusNamesMetaclass
1473
1474
747
1475
class ClientHandler(socketserver.BaseRequestHandler, object):
748
1476
"""A class to handle client connections.
749
1477
751
1479
Note: This will run in its own forked process."""
752
1480
753
1481
def handle(self):
754
logger.info(u"TCP connection from: %s",
755
unicode(self.client_address))
756
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
757
# Open IPC pipe to parent process
758
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1482
with contextlib.closing(self.server.child_pipe) as child_pipe:
1483
logger.info("TCP connection from: %s",
1484
unicode(self.client_address))
1485
logger.debug("Pipe FD: %d",
1486
self.server.child_pipe.fileno())
1487
759
1488
session = (gnutls.connection
760
1489
.ClientSession(self.request,
761
1490
gnutls.connection
762
1491
.X509Credentials()))
763
1492
764
line = self.request.makefile().readline()
765
logger.debug(u"Protocol version: %r", line)
766
try:
767
if int(line.strip().split()[0]) > 1:
768
raise RuntimeError
769
except (ValueError, IndexError, RuntimeError), error:
770
logger.error(u"Unknown protocol version: %s", error)
771
return
772
773
1493
# Note: gnutls.connection.X509Credentials is really a
774
1494
# generic GnuTLS certificate credentials object so long as
775
1495
# no X.509 keys are added to it. Therefore, we can use it
776
1496
# here despite using OpenPGP certificates.
777
1497
778
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
779
# u"+AES-256-CBC", u"+SHA1",
780
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
781
# u"+DHE-DSS"))
1498
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1499
# "+AES-256-CBC", "+SHA1",
1500
# "+COMP-NULL", "+CTYPE-OPENPGP",
1501
# "+DHE-DSS"))
782
1502
# Use a fallback default, since this MUST be set.
783
1503
priority = self.server.gnutls_priority
784
1504
if priority is None:
785
priority = u"NORMAL"
1505
priority = "NORMAL"
786
1506
(gnutls.library.functions
787
1507
.gnutls_priority_set_direct(session._c_object,
788
1508
priority, None))
789
1509
1510
# Start communication using the Mandos protocol
1511
# Get protocol number
1512
line = self.request.makefile().readline()
1513
logger.debug("Protocol version: %r", line)
1514
try:
1515
if int(line.strip().split()[0]) > 1:
1516
raise RuntimeError
1517
except (ValueError, IndexError, RuntimeError) as error:
1518
logger.error("Unknown protocol version: %s", error)
1519
return
1520
1521
# Start GnuTLS connection
790
1522
try:
791
1523
session.handshake()
792
except gnutls.errors.GNUTLSError, error:
793
logger.warning(u"Handshake failed: %s", error)
1524
except gnutls.errors.GNUTLSError as error:
1525
logger.warning("Handshake failed: %s", error)
794
1526
# Do not run session.bye() here: the session is not
795
1527
# established. Just abandon the request.
796
1528
return
797
logger.debug(u"Handshake succeeded")
1529
logger.debug("Handshake succeeded")
1530
1531
approval_required = False
798
1532
try:
799
fpr = self.fingerprint(self.peer_certificate(session))
800
except (TypeError, gnutls.errors.GNUTLSError), error:
801
logger.warning(u"Bad certificate: %s", error)
802
session.bye()
803
return
804
logger.debug(u"Fingerprint: %s", fpr)
1533
try:
1534
fpr = self.fingerprint(self.peer_certificate
1535
(session))
1536
except (TypeError,
1537
gnutls.errors.GNUTLSError) as error:
1538
logger.warning("Bad certificate: %s", error)
1539
return
1540
logger.debug("Fingerprint: %s", fpr)
1541
1542
try:
1543
client = ProxyClient(child_pipe, fpr,
1544
self.client_address)
1545
except KeyError:
1546
return
1547
1548
if client.approval_delay:
1549
delay = client.approval_delay
1550
client.approvals_pending += 1
1551
approval_required = True
1552
1553
while True:
1554
if not client.enabled:
1555
logger.info("Client %s is disabled",
1556
client.name)
1557
if self.server.use_dbus:
1558
# Emit D-Bus signal
1559
client.Rejected("Disabled")
1560
return
1561
1562
if client.approved or not client.approval_delay:
1563
#We are approved or approval is disabled
1564
break
1565
elif client.approved is None:
1566
logger.info("Client %s needs approval",
1567
client.name)
1568
if self.server.use_dbus:
1569
# Emit D-Bus signal
1570
client.NeedApproval(
1571
client.approval_delay_milliseconds(),
1572
client.approved_by_default)
1573
else:
1574
logger.warning("Client %s was not approved",
1575
client.name)
1576
if self.server.use_dbus:
1577
# Emit D-Bus signal
1578
client.Rejected("Denied")
1579
return
1580
1581
#wait until timeout or approved
1582
time = datetime.datetime.now()
1583
client.changedstate.acquire()
1584
(client.changedstate.wait
1585
(float(client.timedelta_to_milliseconds(delay)
1586
/ 1000)))
1587
client.changedstate.release()
1588
time2 = datetime.datetime.now()
1589
if (time2 - time) >= delay:
1590
if not client.approved_by_default:
1591
logger.warning("Client %s timed out while"
1592
" waiting for approval",
1593
client.name)
1594
if self.server.use_dbus:
1595
# Emit D-Bus signal
1596
client.Rejected("Approval timed out")
1597
return
1598
else:
1599
break
1600
else:
1601
delay -= time2 - time
1602
1603
sent_size = 0
1604
while sent_size < len(client.secret):
1605
try:
1606
sent = session.send(client.secret[sent_size:])
1607
except gnutls.errors.GNUTLSError as error:
1608
logger.warning("gnutls send failed")
1609
return
1610
logger.debug("Sent: %d, remaining: %d",
1611
sent, len(client.secret)
1612
- (sent_size + sent))
1613
sent_size += sent
1614
1615
logger.info("Sending secret to %s", client.name)
1616
# bump the timeout using extended_timeout
1617
client.bump_timeout(client.extended_timeout)
1618
if self.server.use_dbus:
1619
# Emit D-Bus signal
1620
client.GotSecret()
805
1621
806
for c in self.server.clients:
807
if c.fingerprint == fpr:
808
client = c
809
break
810
else:
811
ipc.write(u"NOTFOUND %s\n" % fpr)
812
session.bye()
813
return
814
# Have to check if client.still_valid(), since it is
815
# possible that the client timed out while establishing
816
# the GnuTLS session.
817
if not client.still_valid():
818
ipc.write(u"INVALID %s\n" % client.name)
819
session.bye()
820
return
821
ipc.write(u"SENDING %s\n" % client.name)
822
sent_size = 0
823
while sent_size < len(client.secret):
824
sent = session.send(client.secret[sent_size:])
825
logger.debug(u"Sent: %d, remaining: %d",
826
sent, len(client.secret)
827
- (sent_size + sent))
828
sent_size += sent
829
session.bye()
1622
finally:
1623
if approval_required:
1624
client.approvals_pending -= 1
1625
try:
1626
session.bye()
1627
except gnutls.errors.GNUTLSError as error:
1628
logger.warning("GnuTLS bye failed")
830
1629
831
1630
@staticmethod
832
1631
def peer_certificate(session):
842
1641
.gnutls_certificate_get_peers
843
1642
(session._c_object, ctypes.byref(list_size)))
844
1643
if not bool(cert_list) and list_size.value != 0:
845
raise gnutls.errors.GNUTLSError(u"error getting peer"
846
u" certificate")
1644
raise gnutls.errors.GNUTLSError("error getting peer"
1645
" certificate")
847
1646
if list_size.value == 0:
848
1647
return None
849
1648
cert = cert_list[0]
875
1674
if crtverify.value != 0:
876
1675
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
877
1676
raise (gnutls.errors.CertificateSecurityError
878
(u"Verify failed"))
1677
("Verify failed"))
879
1678
# New buffer for the fingerprint
880
1679
buf = ctypes.create_string_buffer(20)
881
1680
buf_len = ctypes.c_size_t()
888
1687
# Convert the buffer to a Python bytestring
889
1688
fpr = ctypes.string_at(buf, buf_len.value)
890
1689
# Convert the bytestring to hexadecimal notation
891
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1690
hex_fpr = binascii.hexlify(fpr).upper()
892
1691
return hex_fpr
893
1692
894
1693
895
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
896
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1694
class MultiprocessingMixIn(object):
1695
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1696
def sub_process_main(self, request, address):
1697
try:
1698
self.finish_request(request, address)
1699
except Exception:
1700
self.handle_error(request, address)
1701
self.close_request(request)
1702
1703
def process_request(self, request, address):
1704
"""Start a new process to process the request."""
1705
proc = multiprocessing.Process(target = self.sub_process_main,
1706
args = (request,
1707
address))
1708
proc.start()
1709
return proc
1710
1711
1712
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1713
""" adds a pipe to the MixIn """
897
1714
def process_request(self, request, client_address):
898
1715
"""Overrides and wraps the original process_request().
899
1716
900
This function creates a new pipe in self.pipe
1717
This function creates a new pipe in self.pipe
901
1718
"""
902
self.pipe = os.pipe()
903
super(ForkingMixInWithPipe,
904
self).process_request(request, client_address)
905
os.close(self.pipe[1]) # close write end
906
self.add_pipe(self.pipe[0])
907
def add_pipe(self, pipe):
1719
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1720
1721
proc = MultiprocessingMixIn.process_request(self, request,
1722
client_address)
1723
self.child_pipe.close()
1724
self.add_pipe(parent_pipe, proc)
1725
1726
def add_pipe(self, parent_pipe, proc):
908
1727
"""Dummy function; override as necessary"""
909
os.close(pipe)
910
911
912
class IPv6_TCPServer(ForkingMixInWithPipe,
1728
raise NotImplementedError
1729
1730
1731
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
913
1732
socketserver.TCPServer, object):
914
1733
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
915
1734
931
1750
bind to an address or port if they were not specified."""
932
1751
if self.interface is not None:
933
1752
if SO_BINDTODEVICE is None:
934
logger.error(u"SO_BINDTODEVICE does not exist;"
935
u" cannot bind to interface %s",
1753
logger.error("SO_BINDTODEVICE does not exist;"
1754
" cannot bind to interface %s",
936
1755
self.interface)
937
1756
else:
938
1757
try:
939
1758
self.socket.setsockopt(socket.SOL_SOCKET,
940
1759
SO_BINDTODEVICE,
941
1760
str(self.interface
942
+ u'\0'))
943
except socket.error, error:
1761
+ '\0'))
1762
except socket.error as error:
944
1763
if error[0] == errno.EPERM:
945
logger.error(u"No permission to"
946
u" bind to interface %s",
1764
logger.error("No permission to"
1765
" bind to interface %s",
947
1766
self.interface)
948
1767
elif error[0] == errno.ENOPROTOOPT:
949
logger.error(u"SO_BINDTODEVICE not available;"
950
u" cannot bind to interface %s",
1768
logger.error("SO_BINDTODEVICE not available;"
1769
" cannot bind to interface %s",
951
1770
self.interface)
952
1771
else:
953
1772
raise
955
1774
if self.server_address[0] or self.server_address[1]:
956
1775
if not self.server_address[0]:
957
1776
if self.address_family == socket.AF_INET6:
958
any_address = u"::" # in6addr_any
1777
any_address = "::" # in6addr_any
959
1778
else:
960
1779
any_address = socket.INADDR_ANY
961
1780
self.server_address = (any_address,
979
1798
clients: set of Client objects
980
1799
gnutls_priority GnuTLS priority string
981
1800
use_dbus: Boolean; to emit D-Bus signals or not
982
clients: set of Client objects
983
gnutls_priority GnuTLS priority string
984
use_dbus: Boolean; to emit D-Bus signals or not
985
1801
986
1802
Assumes a gobject.MainLoop event loop.
987
1803
"""
990
1806
gnutls_priority=None, use_dbus=True):
991
1807
self.enabled = False
992
1808
self.clients = clients
1809
if self.clients is None:
1810
self.clients = {}
993
1811
self.use_dbus = use_dbus
994
1812
self.gnutls_priority = gnutls_priority
995
1813
IPv6_TCPServer.__init__(self, server_address,
999
1817
def server_activate(self):
1000
1818
if self.enabled:
1001
1819
return socketserver.TCPServer.server_activate(self)
1820
1002
1821
def enable(self):
1003
1822
self.enabled = True
1004
def add_pipe(self, pipe):
1823
1824
def add_pipe(self, parent_pipe, proc):
1005
1825
# Call "handle_ipc" for both data and EOF events
1006
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1007
self.handle_ipc)
1008
def handle_ipc(self, source, condition, file_objects={}):
1826
gobject.io_add_watch(parent_pipe.fileno(),
1827
gobject.IO_IN | gobject.IO_HUP,
1828
functools.partial(self.handle_ipc,
1829
parent_pipe =
1830
parent_pipe,
1831
proc = proc))
1832
1833
def handle_ipc(self, source, condition, parent_pipe=None,
1834
proc = None, client_object=None):
1009
1835
condition_names = {
1010
gobject.IO_IN: u"IN", # There is data to read.
1011
gobject.IO_OUT: u"OUT", # Data can be written (without
1836
gobject.IO_IN: "IN", # There is data to read.
1837
gobject.IO_OUT: "OUT", # Data can be written (without
1012
1838
# blocking).
1013
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1014
gobject.IO_ERR: u"ERR", # Error condition.
1015
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1839
gobject.IO_PRI: "PRI", # There is urgent data to read.
1840
gobject.IO_ERR: "ERR", # Error condition.
1841
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1016
1842
# broken, usually for pipes and
1017
1843
# sockets).
1018
1844
}
1020
1846
for cond, name in
1021
1847
condition_names.iteritems()
1022
1848
if cond & condition)
1023
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1024
conditions_string)
1025
1026
# Turn the pipe file descriptor into a Python file object
1027
if source not in file_objects:
1028
file_objects[source] = os.fdopen(source, u"r", 1)
1029
1030
# Read a line from the file object
1031
cmdline = file_objects[source].readline()
1032
if not cmdline: # Empty line means end of file
1033
# close the IPC pipe
1034
file_objects[source].close()
1035
del file_objects[source]
1036
1037
# Stop calling this function
1038
return False
1039
1040
logger.debug(u"IPC command: %r", cmdline)
1041
1042
# Parse and act on command
1043
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1044
1045
if cmd == u"NOTFOUND":
1046
logger.warning(u"Client not found for fingerprint: %s",
1047
args)
1048
if self.use_dbus:
1049
# Emit D-Bus signal
1050
mandos_dbus_service.ClientNotFound(args)
1051
elif cmd == u"INVALID":
1052
for client in self.clients:
1053
if client.name == args:
1054
logger.warning(u"Client %s is invalid", args)
1055
if self.use_dbus:
1056
# Emit D-Bus signal
1057
client.Rejected()
1058
break
1059
else:
1060
logger.error(u"Unknown client %s is invalid", args)
1061
elif cmd == u"SENDING":
1062
for client in self.clients:
1063
if client.name == args:
1064
logger.info(u"Sending secret to %s", client.name)
1065
client.checked_ok()
1066
if self.use_dbus:
1067
# Emit D-Bus signal
1068
client.ReceivedSecret()
1069
break
1070
else:
1071
logger.error(u"Sending secret to unknown client %s",
1072
args)
1073
else:
1074
logger.error(u"Unknown IPC command: %r", cmdline)
1075
1076
# Keep calling this function
1849
# error, or the other end of multiprocessing.Pipe has closed
1850
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1851
# Wait for other process to exit
1852
proc.join()
1853
return False
1854
1855
# Read a request from the child
1856
request = parent_pipe.recv()
1857
command = request[0]
1858
1859
if command == 'init':
1860
fpr = request[1]
1861
address = request[2]
1862
1863
for c in self.clients.itervalues():
1864
if c.fingerprint == fpr:
1865
client = c
1866
break
1867
else:
1868
logger.info("Client not found for fingerprint: %s, ad"
1869
"dress: %s", fpr, address)
1870
if self.use_dbus:
1871
# Emit D-Bus signal
1872
mandos_dbus_service.ClientNotFound(fpr,
1873
address[0])
1874
parent_pipe.send(False)
1875
return False
1876
1877
gobject.io_add_watch(parent_pipe.fileno(),
1878
gobject.IO_IN | gobject.IO_HUP,
1879
functools.partial(self.handle_ipc,
1880
parent_pipe =
1881
parent_pipe,
1882
proc = proc,
1883
client_object =
1884
client))
1885
parent_pipe.send(True)
1886
# remove the old hook in favor of the new above hook on
1887
# same fileno
1888
return False
1889
if command == 'funcall':
1890
funcname = request[1]
1891
args = request[2]
1892
kwargs = request[3]
1893
1894
parent_pipe.send(('data', getattr(client_object,
1895
funcname)(*args,
1896
**kwargs)))
1897
1898
if command == 'getattr':
1899
attrname = request[1]
1900
if callable(client_object.__getattribute__(attrname)):
1901
parent_pipe.send(('function',))
1902
else:
1903
parent_pipe.send(('data', client_object
1904
.__getattribute__(attrname)))
1905
1906
if command == 'setattr':
1907
attrname = request[1]
1908
value = request[2]
1909
setattr(client_object, attrname, value)
1910
1077
1911
return True
1078
1912
1079
1913
1080
1914
def string_to_delta(interval):
1081
1915
"""Parse a string and return a datetime.timedelta
1082
1916
1083
>>> string_to_delta(u'7d')
1917
>>> string_to_delta('7d')
1084
1918
datetime.timedelta(7)
1085
>>> string_to_delta(u'60s')
1919
>>> string_to_delta('60s')
1086
1920
datetime.timedelta(0, 60)
1087
>>> string_to_delta(u'60m')
1921
>>> string_to_delta('60m')
1088
1922
datetime.timedelta(0, 3600)
1089
>>> string_to_delta(u'24h')
1923
>>> string_to_delta('24h')
1090
1924
datetime.timedelta(1)
1091
>>> string_to_delta(u'1w')
1925
>>> string_to_delta('1w')
1092
1926
datetime.timedelta(7)
1093
>>> string_to_delta(u'5m 30s')
1927
>>> string_to_delta('5m 30s')
1094
1928
datetime.timedelta(0, 330)
1095
1929
"""
1096
1930
timevalue = datetime.timedelta(0)
1098
1932
try:
1099
1933
suffix = unicode(s[-1])
1100
1934
value = int(s[:-1])
1101
if suffix == u"d":
1935
if suffix == "d":
1102
1936
delta = datetime.timedelta(value)
1103
elif suffix == u"s":
1937
elif suffix == "s":
1104
1938
delta = datetime.timedelta(0, value)
1105
elif suffix == u"m":
1939
elif suffix == "m":
1106
1940
delta = datetime.timedelta(0, 0, 0, 0, value)
1107
elif suffix == u"h":
1941
elif suffix == "h":
1108
1942
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1109
elif suffix == u"w":
1943
elif suffix == "w":
1110
1944
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1111
1945
else:
1112
raise ValueError
1113
except (ValueError, IndexError):
1114
raise ValueError
1946
raise ValueError("Unknown suffix %r" % suffix)
1947
except (ValueError, IndexError) as e:
1948
raise ValueError(*(e.args))
1115
1949
timevalue += delta
1116
1950
return timevalue
1117
1951
1118
1952
1119
def if_nametoindex(interface):
1120
"""Call the C function if_nametoindex(), or equivalent
1121
1122
Note: This function cannot accept a unicode string."""
1123
global if_nametoindex
1124
try:
1125
if_nametoindex = (ctypes.cdll.LoadLibrary
1126
(ctypes.util.find_library(u"c"))
1127
.if_nametoindex)
1128
except (OSError, AttributeError):
1129
logger.warning(u"Doing if_nametoindex the hard way")
1130
def if_nametoindex(interface):
1131
"Get an interface index the hard way, i.e. using fcntl()"
1132
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1133
with closing(socket.socket()) as s:
1134
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1135
struct.pack(str(u"16s16x"),
1136
interface))
1137
interface_index = struct.unpack(str(u"I"),
1138
ifreq[16:20])[0]
1139
return interface_index
1140
return if_nametoindex(interface)
1141
1142
1143
1953
def daemon(nochdir = False, noclose = False):
1144
1954
"""See daemon(3). Standard BSD Unix function.
1145
1955
1148
1958
sys.exit()
1149
1959
os.setsid()
1150
1960
if not nochdir:
1151
os.chdir(u"/")
1961
os.chdir("/")
1152
1962
if os.fork():
1153
1963
sys.exit()
1154
1964
if not noclose:
1156
1966
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1157
1967
if not stat.S_ISCHR(os.fstat(null).st_mode):
1158
1968
raise OSError(errno.ENODEV,
1159
u"/dev/null not a character device")
1969
"%s not a character device"
1970
% os.path.devnull)
1160
1971
os.dup2(null, sys.stdin.fileno())
1161
1972
os.dup2(null, sys.stdout.fileno())
1162
1973
os.dup2(null, sys.stderr.fileno())
1166
1977
1167
1978
def main():
1168
1979
1169
######################################################################
1980
##################################################################
1170
1981
# Parsing of options, both command line and config file
1171
1982
1172
parser = optparse.OptionParser(version = "%%prog %s" % version)
1173
parser.add_option("-i", u"--interface", type=u"string",
1174
metavar="IF", help=u"Bind to interface IF")
1175
parser.add_option("-a", u"--address", type=u"string",
1176
help=u"Address to listen for requests on")
1177
parser.add_option("-p", u"--port", type=u"int",
1178
help=u"Port number to receive requests on")
1179
parser.add_option("--check", action=u"store_true",
1180
help=u"Run self-test")
1181
parser.add_option("--debug", action=u"store_true",
1182
help=u"Debug mode; run in foreground and log to"
1183
u" terminal")
1184
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1185
u" priority string (see GnuTLS documentation)")
1186
parser.add_option("--servicename", type=u"string",
1187
metavar=u"NAME", help=u"Zeroconf service name")
1188
parser.add_option("--configdir", type=u"string",
1189
default=u"/etc/mandos", metavar=u"DIR",
1190
help=u"Directory to search for configuration"
1191
u" files")
1192
parser.add_option("--no-dbus", action=u"store_false",
1193
dest=u"use_dbus", help=u"Do not provide D-Bus"
1194
u" system bus interface")
1195
parser.add_option("--no-ipv6", action=u"store_false",
1196
dest=u"use_ipv6", help=u"Do not use IPv6")
1197
options = parser.parse_args()[0]
1983
parser = argparse.ArgumentParser()
1984
parser.add_argument("-v", "--version", action="version",
1985
version = "%%(prog)s %s" % version,
1986
help="show version number and exit")
1987
parser.add_argument("-i", "--interface", metavar="IF",
1988
help="Bind to interface IF")
1989
parser.add_argument("-a", "--address",
1990
help="Address to listen for requests on")
1991
parser.add_argument("-p", "--port", type=int,
1992
help="Port number to receive requests on")
1993
parser.add_argument("--check", action="store_true",
1994
help="Run self-test")
1995
parser.add_argument("--debug", action="store_true",
1996
help="Debug mode; run in foreground and log"
1997
" to terminal")
1998
parser.add_argument("--debuglevel", metavar="LEVEL",
1999
help="Debug level for stdout output")
2000
parser.add_argument("--priority", help="GnuTLS"
2001
" priority string (see GnuTLS documentation)")
2002
parser.add_argument("--servicename",
2003
metavar="NAME", help="Zeroconf service name")
2004
parser.add_argument("--configdir",
2005
default="/etc/mandos", metavar="DIR",
2006
help="Directory to search for configuration"
2007
" files")
2008
parser.add_argument("--no-dbus", action="store_false",
2009
dest="use_dbus", help="Do not provide D-Bus"
2010
" system bus interface")
2011
parser.add_argument("--no-ipv6", action="store_false",
2012
dest="use_ipv6", help="Do not use IPv6")
2013
parser.add_argument("--no-restore", action="store_false",
2014
dest="restore", help="Do not restore stored"
2015
" state")
2016
parser.add_argument("--statedir", metavar="DIR",
2017
help="Directory to save/restore state in")
2018
2019
options = parser.parse_args()
1198
2020
1199
2021
if options.check:
1200
2022
import doctest
1202
2024
sys.exit()
1203
2025
1204
2026
# Default values for config file for server-global settings
1205
server_defaults = { u"interface": u"",
1206
u"address": u"",
1207
u"port": u"",
1208
u"debug": u"False",
1209
u"priority":
1210
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1211
u"servicename": u"Mandos",
1212
u"use_dbus": u"True",
1213
u"use_ipv6": u"True",
2027
server_defaults = { "interface": "",
2028
"address": "",
2029
"port": "",
2030
"debug": "False",
2031
"priority":
2032
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2033
"servicename": "Mandos",
2034
"use_dbus": "True",
2035
"use_ipv6": "True",
2036
"debuglevel": "",
2037
"restore": "True",
2038
"statedir": "/var/lib/mandos"
1214
2039
}
1215
2040
1216
2041
# Parse config file for server-global settings
1217
2042
server_config = configparser.SafeConfigParser(server_defaults)
1218
2043
del server_defaults
1219
2044
server_config.read(os.path.join(options.configdir,
1220
u"mandos.conf"))
2045
"mandos.conf"))
1221
2046
# Convert the SafeConfigParser object to a dict
1222
2047
server_settings = server_config.defaults()
1223
2048
# Use the appropriate methods on the non-string config options
1224
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1225
server_settings[option] = server_config.getboolean(u"DEFAULT",
2049
for option in ("debug", "use_dbus", "use_ipv6"):
2050
server_settings[option] = server_config.getboolean("DEFAULT",
1226
2051
option)
1227
2052
if server_settings["port"]:
1228
server_settings["port"] = server_config.getint(u"DEFAULT",
1229
u"port")
2053
server_settings["port"] = server_config.getint("DEFAULT",
2054
"port")
1230
2055
del server_config
1231
2056
1232
2057
# Override the settings from the config file with command line
1233
2058
# options, if set.
1234
for option in (u"interface", u"address", u"port", u"debug",
1235
u"priority", u"servicename", u"configdir",
1236
u"use_dbus", u"use_ipv6"):
2059
for option in ("interface", "address", "port", "debug",
2060
"priority", "servicename", "configdir",
2061
"use_dbus", "use_ipv6", "debuglevel", "restore",
2062
"statedir"):
1237
2063
value = getattr(options, option)
1238
2064
if value is not None:
1239
2065
server_settings[option] = value
1247
2073
##################################################################
1248
2074
1249
2075
# For convenience
1250
debug = server_settings[u"debug"]
1251
use_dbus = server_settings[u"use_dbus"]
1252
use_ipv6 = server_settings[u"use_ipv6"]
1253
1254
if not debug:
1255
syslogger.setLevel(logging.WARNING)
1256
console.setLevel(logging.WARNING)
1257
1258
if server_settings[u"servicename"] != u"Mandos":
2076
debug = server_settings["debug"]
2077
debuglevel = server_settings["debuglevel"]
2078
use_dbus = server_settings["use_dbus"]
2079
use_ipv6 = server_settings["use_ipv6"]
2080
stored_state_path = os.path.join(server_settings["statedir"],
2081
stored_state_file)
2082
2083
if debug:
2084
initlogger(debug, logging.DEBUG)
2085
else:
2086
if not debuglevel:
2087
initlogger(debug)
2088
else:
2089
level = getattr(logging, debuglevel.upper())
2090
initlogger(debug, level)
2091
2092
if server_settings["servicename"] != "Mandos":
1259
2093
syslogger.setFormatter(logging.Formatter
1260
(u'Mandos (%s) [%%(process)d]:'
1261
u' %%(levelname)s: %%(message)s'
1262
% server_settings[u"servicename"]))
2094
('Mandos (%s) [%%(process)d]:'
2095
' %%(levelname)s: %%(message)s'
2096
% server_settings["servicename"]))
1263
2097
1264
2098
# Parse config file with clients
1265
client_defaults = { u"timeout": u"1h",
1266
u"interval": u"5m",
1267
u"checker": u"fping -q -- %%(host)s",
1268
u"host": u"",
1269
}
1270
client_config = configparser.SafeConfigParser(client_defaults)
1271
client_config.read(os.path.join(server_settings[u"configdir"],
1272
u"clients.conf"))
2099
client_config = configparser.SafeConfigParser(Client
2100
.client_defaults)
2101
client_config.read(os.path.join(server_settings["configdir"],
2102
"clients.conf"))
1273
2103
1274
2104
global mandos_dbus_service
1275
2105
mandos_dbus_service = None
1276
2106
1277
clients = set()
1278
tcp_server = MandosServer((server_settings[u"address"],
1279
server_settings[u"port"]),
2107
tcp_server = MandosServer((server_settings["address"],
2108
server_settings["port"]),
1280
2109
ClientHandler,
1281
interface=server_settings[u"interface"],
2110
interface=(server_settings["interface"]
2111
or None),
1282
2112
use_ipv6=use_ipv6,
1283
clients=clients,
1284
2113
gnutls_priority=
1285
server_settings[u"priority"],
2114
server_settings["priority"],
1286
2115
use_dbus=use_dbus)
1287
pidfilename = u"/var/run/mandos.pid"
1288
try:
1289
pidfile = open(pidfilename, u"w")
1290
except IOError:
1291
logger.error(u"Could not open file %r", pidfilename)
2116
if not debug:
2117
pidfilename = "/var/run/mandos.pid"
2118
try:
2119
pidfile = open(pidfilename, "w")
2120
except IOError:
2121
logger.error("Could not open file %r", pidfilename)
1292
2122
1293
2123
try:
1294
uid = pwd.getpwnam(u"_mandos").pw_uid
1295
gid = pwd.getpwnam(u"_mandos").pw_gid
2124
uid = pwd.getpwnam("_mandos").pw_uid
2125
gid = pwd.getpwnam("_mandos").pw_gid
1296
2126
except KeyError:
1297
2127
try:
1298
uid = pwd.getpwnam(u"mandos").pw_uid
1299
gid = pwd.getpwnam(u"mandos").pw_gid
2128
uid = pwd.getpwnam("mandos").pw_uid
2129
gid = pwd.getpwnam("mandos").pw_gid
1300
2130
except KeyError:
1301
2131
try:
1302
uid = pwd.getpwnam(u"nobody").pw_uid
1303
gid = pwd.getpwnam(u"nobody").pw_gid
2132
uid = pwd.getpwnam("nobody").pw_uid
2133
gid = pwd.getpwnam("nobody").pw_gid
1304
2134
except KeyError:
1305
2135
uid = 65534
1306
2136
gid = 65534
1307
2137
try:
1308
2138
os.setgid(gid)
1309
2139
os.setuid(uid)
1310
except OSError, error:
2140
except OSError as error:
1311
2141
if error[0] != errno.EPERM:
1312
2142
raise error
1313
2143
1314
# Enable all possible GnuTLS debugging
1315
2144
if debug:
2145
# Enable all possible GnuTLS debugging
2146
1316
2147
# "Use a log level over 10 to enable all debugging options."
1317
2148
# - GnuTLS manual
1318
2149
gnutls.library.functions.gnutls_global_set_log_level(11)
1319
2150
1320
2151
@gnutls.library.types.gnutls_log_func
1321
2152
def debug_gnutls(level, string):
1322
logger.debug(u"GnuTLS: %s", string[:-1])
2153
logger.debug("GnuTLS: %s", string[:-1])
1323
2154
1324
2155
(gnutls.library.functions
1325
2156
.gnutls_global_set_log_function(debug_gnutls))
2157
2158
# Redirect stdin so all checkers get /dev/null
2159
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2160
os.dup2(null, sys.stdin.fileno())
2161
if null > 2:
2162
os.close(null)
2163
2164
# Need to fork before connecting to D-Bus
2165
if not debug:
2166
# Close all input and output, do double fork, etc.
2167
daemon()
2168
2169
gobject.threads_init()
1326
2170
1327
2171
global main_loop
1328
2172
# From the Avahi example code
1331
2175
bus = dbus.SystemBus()
1332
2176
# End of Avahi example code
1333
2177
if use_dbus:
1334
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2178
try:
2179
bus_name = dbus.service.BusName("se.recompile.Mandos",
2180
bus, do_not_queue=True)
2181
old_bus_name = (dbus.service.BusName
2182
("se.bsnet.fukt.Mandos", bus,
2183
do_not_queue=True))
2184
except dbus.exceptions.NameExistsException as e:
2185
logger.error(unicode(e) + ", disabling D-Bus")
2186
use_dbus = False
2187
server_settings["use_dbus"] = False
2188
tcp_server.use_dbus = False
1335
2189
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1336
service = AvahiService(name = server_settings[u"servicename"],
1337
servicetype = u"_mandos._tcp",
1338
protocol = protocol, bus = bus)
2190
service = AvahiServiceToSyslog(name =
2191
server_settings["servicename"],
2192
servicetype = "_mandos._tcp",
2193
protocol = protocol, bus = bus)
1339
2194
if server_settings["interface"]:
1340
2195
service.interface = (if_nametoindex
1341
(str(server_settings[u"interface"])))
2196
(str(server_settings["interface"])))
2197
2198
global multiprocessing_manager
2199
multiprocessing_manager = multiprocessing.Manager()
1342
2200
1343
2201
client_class = Client
1344
2202
if use_dbus:
1345
client_class = functools.partial(ClientDBus, bus = bus)
1346
clients.update(set(
1347
client_class(name = section,
1348
config= dict(client_config.items(section)))
1349
for section in client_config.sections()))
1350
if not clients:
1351
logger.warning(u"No clients defined")
1352
1353
if debug:
1354
# Redirect stdin so all checkers get /dev/null
1355
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1356
os.dup2(null, sys.stdin.fileno())
1357
if null > 2:
1358
os.close(null)
1359
else:
1360
# No console logging
1361
logger.removeHandler(console)
1362
# Close all input and output, do double fork, etc.
1363
daemon()
1364
1365
try:
1366
with closing(pidfile):
1367
pid = os.getpid()
1368
pidfile.write(str(pid) + "\n")
1369
del pidfile
1370
except IOError:
1371
logger.error(u"Could not write to file %r with PID %d",
1372
pidfilename, pid)
1373
except NameError:
1374
# "pidfile" was never created
1375
pass
1376
del pidfilename
1377
1378
def cleanup():
1379
"Cleanup function; run on exit"
1380
service.cleanup()
2203
client_class = functools.partial(ClientDBusTransitional,
2204
bus = bus)
2205
2206
client_settings = Client.config_parser(client_config)
2207
old_client_settings = {}
2208
clients_data = {}
2209
2210
# Get client data and settings from last running state.
2211
if server_settings["restore"]:
2212
try:
2213
with open(stored_state_path, "rb") as stored_state:
2214
clients_data, old_client_settings = (pickle.load
2215
(stored_state))
2216
os.remove(stored_state_path)
2217
except IOError as e:
2218
logger.warning("Could not load persistent state: {0}"
2219
.format(e))
2220
if e.errno != errno.ENOENT:
2221
raise
2222
except EOFError as e:
2223
logger.warning("Could not load persistent state: "
2224
"EOFError: {0}".format(e))
2225
2226
with PGPEngine() as pgp:
2227
for client_name, client in clients_data.iteritems():
2228
# Decide which value to use after restoring saved state.
2229
# We have three different values: Old config file,
2230
# new config file, and saved state.
2231
# New config value takes precedence if it differs from old
2232
# config value, otherwise use saved state.
2233
for name, value in client_settings[client_name].items():
2234
try:
2235
# For each value in new config, check if it
2236
# differs from the old config value (Except for
2237
# the "secret" attribute)
2238
if (name != "secret" and
2239
value != old_client_settings[client_name]
2240
[name]):
2241
client[name] = value
2242
except KeyError:
2243
pass
2244
2245
# Clients who has passed its expire date can still be
2246
# enabled if its last checker was successful. Clients
2247
# whose checker succeeded before we stored its state is
2248
# assumed to have successfully run all checkers during
2249
# downtime.
2250
if client["enabled"]:
2251
if datetime.datetime.utcnow() >= client["expires"]:
2252
if not client["last_checked_ok"]:
2253
logger.warning(
2254
"disabling client {0} - Client never "
2255
"performed a successful checker"
2256
.format(client_name))
2257
client["enabled"] = False
2258
elif client["last_checker_status"] != 0:
2259
logger.warning(
2260
"disabling client {0} - Client "
2261
"last checker failed with error code {1}"
2262
.format(client_name,
2263
client["last_checker_status"]))
2264
client["enabled"] = False
2265
else:
2266
client["expires"] = (datetime.datetime
2267
.utcnow()
2268
+ client["timeout"])
2269
logger.debug("Last checker succeeded,"
2270
" keeping {0} enabled"
2271
.format(client_name))
2272
try:
2273
client["secret"] = (
2274
pgp.decrypt(client["encrypted_secret"],
2275
client_settings[client_name]
2276
["secret"]))
2277
except PGPError:
2278
# If decryption fails, we use secret from new settings
2279
logger.debug("Failed to decrypt {0} old secret"
2280
.format(client_name))
2281
client["secret"] = (
2282
client_settings[client_name]["secret"])
2283
2284
2285
# Add/remove clients based on new changes made to config
2286
for client_name in (set(old_client_settings)
2287
- set(client_settings)):
2288
del clients_data[client_name]
2289
for client_name in (set(client_settings)
2290
- set(old_client_settings)):
2291
clients_data[client_name] = client_settings[client_name]
2292
2293
# Create all client objects
2294
for client_name, client in clients_data.iteritems():
2295
tcp_server.clients[client_name] = client_class(
2296
name = client_name, settings = client)
2297
2298
if not tcp_server.clients:
2299
logger.warning("No clients defined")
1381
2300
1382
while clients:
1383
client = clients.pop()
1384
client.disable_hook = None
1385
client.disable()
1386
1387
atexit.register(cleanup)
1388
1389
2301
if not debug:
2302
try:
2303
with pidfile:
2304
pid = os.getpid()
2305
pidfile.write(str(pid) + "\n".encode("utf-8"))
2306
del pidfile
2307
except IOError:
2308
logger.error("Could not write to file %r with PID %d",
2309
pidfilename, pid)
2310
except NameError:
2311
# "pidfile" was never created
2312
pass
2313
del pidfilename
1390
2314
signal.signal(signal.SIGINT, signal.SIG_IGN)
2315
1391
2316
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1392
2317
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1393
2318
1395
2320
class MandosDBusService(dbus.service.Object):
1396
2321
"""A D-Bus proxy object"""
1397
2322
def __init__(self):
1398
dbus.service.Object.__init__(self, bus, u"/")
1399
_interface = u"se.bsnet.fukt.Mandos"
1400
1401
@dbus.service.signal(_interface, signature=u"oa{sv}")
1402
def ClientAdded(self, objpath, properties):
1403
"D-Bus signal"
1404
pass
1405
1406
@dbus.service.signal(_interface, signature=u"s")
1407
def ClientNotFound(self, fingerprint):
1408
"D-Bus signal"
1409
pass
1410
1411
@dbus.service.signal(_interface, signature=u"os")
2323
dbus.service.Object.__init__(self, bus, "/")
2324
_interface = "se.recompile.Mandos"
2325
2326
@dbus.service.signal(_interface, signature="o")
2327
def ClientAdded(self, objpath):
2328
"D-Bus signal"
2329
pass
2330
2331
@dbus.service.signal(_interface, signature="ss")
2332
def ClientNotFound(self, fingerprint, address):
2333
"D-Bus signal"
2334
pass
2335
2336
@dbus.service.signal(_interface, signature="os")
1412
2337
def ClientRemoved(self, objpath, name):
1413
2338
"D-Bus signal"
1414
2339
pass
1415
2340
1416
@dbus.service.method(_interface, out_signature=u"ao")
2341
@dbus.service.method(_interface, out_signature="ao")
1417
2342
def GetAllClients(self):
1418
2343
"D-Bus method"
1419
return dbus.Array(c.dbus_object_path for c in clients)
2344
return dbus.Array(c.dbus_object_path
2345
for c in
2346
tcp_server.clients.itervalues())
1420
2347
1421
2348
@dbus.service.method(_interface,
1422
out_signature=u"a{oa{sv}}")
2349
out_signature="a{oa{sv}}")
1423
2350
def GetAllClientsWithProperties(self):
1424
2351
"D-Bus method"
1425
2352
return dbus.Dictionary(
1426
((c.dbus_object_path, c.GetAllProperties())
1427
for c in clients),
1428
signature=u"oa{sv}")
2353
((c.dbus_object_path, c.GetAll(""))
2354
for c in tcp_server.clients.itervalues()),
2355
signature="oa{sv}")
1429
2356
1430
@dbus.service.method(_interface, in_signature=u"o")
2357
@dbus.service.method(_interface, in_signature="o")
1431
2358
def RemoveClient(self, object_path):
1432
2359
"D-Bus method"
1433
for c in clients:
2360
for c in tcp_server.clients.itervalues():
1434
2361
if c.dbus_object_path == object_path:
1435
clients.remove(c)
2362
del tcp_server.clients[c.name]
1436
2363
c.remove_from_connection()
1437
2364
# Don't signal anything except ClientRemoved
1438
c.disable(signal=False)
2365
c.disable(quiet=True)
1439
2366
# Emit D-Bus signal
1440
2367
self.ClientRemoved(object_path, c.name)
1441
2368
return
1442
raise KeyError
2369
raise KeyError(object_path)
1443
2370
1444
2371
del _interface
1445
2372
1446
mandos_dbus_service = MandosDBusService()
1447
1448
for client in clients:
2373
class MandosDBusServiceTransitional(MandosDBusService):
2374
__metaclass__ = AlternateDBusNamesMetaclass
2375
mandos_dbus_service = MandosDBusServiceTransitional()
2376
2377
def cleanup():
2378
"Cleanup function; run on exit"
2379
service.cleanup()
2380
2381
multiprocessing.active_children()
2382
if not (tcp_server.clients or client_settings):
2383
return
2384
2385
# Store client before exiting. Secrets are encrypted with key
2386
# based on what config file has. If config file is
2387
# removed/edited, old secret will thus be unrecovable.
2388
clients = {}
2389
with PGPEngine() as pgp:
2390
for client in tcp_server.clients.itervalues():
2391
key = client_settings[client.name]["secret"]
2392
client.encrypted_secret = pgp.encrypt(client.secret,
2393
key)
2394
client_dict = {}
2395
2396
# A list of attributes that can not be pickled
2397
# + secret.
2398
exclude = set(("bus", "changedstate", "secret",
2399
"checker"))
2400
for name, typ in (inspect.getmembers
2401
(dbus.service.Object)):
2402
exclude.add(name)
2403
2404
client_dict["encrypted_secret"] = (client
2405
.encrypted_secret)
2406
for attr in client.client_structure:
2407
if attr not in exclude:
2408
client_dict[attr] = getattr(client, attr)
2409
2410
clients[client.name] = client_dict
2411
del client_settings[client.name]["secret"]
2412
2413
try:
2414
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2415
prefix="clients-",
2416
dir=os.path.dirname
2417
(stored_state_path))
2418
with os.fdopen(tempfd, "wb") as stored_state:
2419
pickle.dump((clients, client_settings), stored_state)
2420
os.rename(tempname, stored_state_path)
2421
except (IOError, OSError) as e:
2422
logger.warning("Could not save persistent state: {0}"
2423
.format(e))
2424
if not debug:
2425
try:
2426
os.remove(tempname)
2427
except NameError:
2428
pass
2429
if e.errno not in set((errno.ENOENT, errno.EACCES,
2430
errno.EEXIST)):
2431
raise e
2432
2433
# Delete all clients, and settings from config
2434
while tcp_server.clients:
2435
name, client = tcp_server.clients.popitem()
2436
if use_dbus:
2437
client.remove_from_connection()
2438
# Don't signal anything except ClientRemoved
2439
client.disable(quiet=True)
2440
if use_dbus:
2441
# Emit D-Bus signal
2442
mandos_dbus_service.ClientRemoved(client
2443
.dbus_object_path,
2444
client.name)
2445
client_settings.clear()
2446
2447
atexit.register(cleanup)
2448
2449
for client in tcp_server.clients.itervalues():
1449
2450
if use_dbus:
1450
2451
# Emit D-Bus signal
1451
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1452
client.GetAllProperties())
1453
client.enable()
2452
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2453
# Need to initiate checking of clients
2454
if client.enabled:
2455
client.init_checker()
1454
2456
1455
2457
tcp_server.enable()
1456
2458
tcp_server.server_activate()
1458
2460
# Find out what port we got
1459
2461
service.port = tcp_server.socket.getsockname()[1]
1460
2462
if use_ipv6:
1461
logger.info(u"Now listening on address %r, port %d,"
2463
logger.info("Now listening on address %r, port %d,"
1462
2464
" flowinfo %d, scope_id %d"
1463
2465
% tcp_server.socket.getsockname())
1464
2466
else: # IPv4
1465
logger.info(u"Now listening on address %r, port %d"
2467
logger.info("Now listening on address %r, port %d"
1466
2468
% tcp_server.socket.getsockname())
1467
2469
1468
2470
#service.interface = tcp_server.socket.getsockname()[3]
1471
2473
# From the Avahi example code
1472
2474
try:
1473
2475
service.activate()
1474
except dbus.exceptions.DBusException, error:
1475
logger.critical(u"DBusException: %s", error)
2476
except dbus.exceptions.DBusException as error:
2477
logger.critical("DBusException: %s", error)
2478
cleanup()
1476
2479
sys.exit(1)
1477
2480
# End of Avahi example code
1478
2481
1481
2484
(tcp_server.handle_request
1482
2485
(*args[2:], **kwargs) or True))
1483
2486
1484
logger.debug(u"Starting main loop")
2487
logger.debug("Starting main loop")
1485
2488
main_loop.run()
1486
except AvahiError, error:
1487
logger.critical(u"AvahiError: %s", error)
2489
except AvahiError as error:
2490
logger.critical("AvahiError: %s", error)
2491
cleanup()
1488
2492
sys.exit(1)
1489
2493
except KeyboardInterrupt:
1490
2494
if debug:
1491
print >> sys.stderr
1492
logger.debug(u"Server received KeyboardInterrupt")
1493
logger.debug(u"Server exiting")
2495
print("", file=sys.stderr)
2496
logger.debug("Server received KeyboardInterrupt")
2497
logger.debug("Server exiting")
2498
# Must run before the D-Bus bus name gets deregistered
2499
cleanup()
1494
2500
1495
2501
if __name__ == '__main__':
1496
2502
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0