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- Committer: Teddy Hogeborn
- Date: 2009-09-22 20:18:43 UTC
- mto: (24.1.146 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20090922201843-cd5uqnthf3eegg4l
* mandos (Client.start_checker): Bug fix: Fix race condition with
short intervals.
short intervals.
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
30
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#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
36
import SocketServer as socketserver
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
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41
import gnutls.crypto
56
55
import logging
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56
import logging.handlers
58
57
import pwd
59
import contextlib
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from contextlib import closing
60
59
import struct
61
60
import fcntl
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61
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
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import tempfile
68
62
69
63
import dbus
70
64
import dbus.service
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69
import ctypes.util
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70
import xml.dom.minidom
77
71
import inspect
78
import GnuPGInterface
79
72
80
73
try:
81
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
78
except ImportError:
86
79
SO_BINDTODEVICE = None
87
80
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
81
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version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
92
85
syslogger = (logging.handlers.SysLogHandler
93
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
209
98
210
99
class AvahiError(Exception):
211
100
def __init__(self, value, *args, **kwargs):
227
116
Attributes:
228
117
interface: integer; avahi.IF_UNSPEC or an interface index.
229
118
Used to optionally bind to the specified interface.
230
name: string; Example: 'Mandos'
231
type: string; Example: '_mandos._tcp'.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
232
121
See <http://www.dns-sd.org/ServiceTypes.html>
233
122
port: integer; what port to announce
234
123
TXT: list of strings; TXT record for the service
243
132
"""
244
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
134
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
135
domain = u"", host = u"", max_renames = 32768,
247
136
protocol = avahi.PROTO_UNSPEC, bus = None):
248
137
self.interface = interface
249
138
self.name = name
258
147
self.group = None # our entry group
259
148
self.server = None
260
149
self.bus = bus
261
self.entry_group_state_changed_match = None
262
150
def rename(self):
263
151
"""Derived from the Avahi example code"""
264
152
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
267
155
self.rename_count)
268
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
273
164
self.remove()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
165
self.add()
280
166
self.rename_count += 1
281
167
def remove(self):
282
168
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
169
if self.group is not None:
287
170
self.group.Reset()
288
171
def add(self):
289
172
"""Derived from the Avahi example code"""
290
self.remove()
291
173
if self.group is None:
292
174
self.group = dbus.Interface(
293
175
self.bus.get_object(avahi.DBUS_NAME,
294
176
self.server.EntryGroupNew()),
295
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
300
182
self.name, self.type)
301
183
self.group.AddService(
302
184
self.interface,
309
191
self.group.Commit()
310
192
def entry_group_state_changed(self, state, error):
311
193
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
194
logger.debug(u"Avahi state change: %i", state)
313
195
314
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
197
logger.debug(u"Zeroconf service established.")
316
198
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
199
logger.warning(u"Zeroconf service name collision.")
318
200
self.rename()
319
201
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
202
logger.critical(u"Avahi: Error in group state changed %s",
321
203
unicode(error))
322
raise AvahiGroupError("State changed: %s"
204
raise AvahiGroupError(u"State changed: %s"
323
205
% unicode(error))
324
206
def cleanup(self):
325
207
"""Derived from the Avahi example code"""
326
208
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
209
self.group.Free()
332
210
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
211
def server_state_changed(self, state):
335
212
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
351
216
elif state == avahi.SERVER_RUNNING:
352
217
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
218
def activate(self):
359
219
"""Derived from the Avahi example code"""
360
220
if self.server is None:
361
221
self.server = dbus.Interface(
362
222
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
223
avahi.DBUS_PATH_SERVER),
365
224
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
225
self.server.connect_to_signal(u"StateChanged",
367
226
self.server_state_changed)
368
227
self.server_state_changed(self.server.GetState())
369
228
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
229
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
386
230
class Client(object):
387
231
"""A representation of a client host served by this server.
388
232
389
233
Attributes:
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
393
248
checker: subprocess.Popen(); a running checker process used
394
249
to see if the client lives.
395
250
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
399
256
runtime with vars(self) as dict, so that for
400
257
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
258
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
last_checker_status: integer between 0 and 255 reflecting exit
415
status of last checker. -1 reflects crashed
416
checker, or None.
417
last_enabled: datetime.datetime(); (UTC) or None
418
name: string; from the config file, used in log messages and
419
D-Bus identifiers
420
secret: bytestring; sent verbatim (over TLS) to client
421
timeout: datetime.timedelta(); How long from last_checked_ok
422
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
424
runtime_expansions: Allowed attributes for runtime expansion.
425
expires: datetime.datetime(); time (UTC) when a client will be
426
disabled, or None
427
259
"""
428
260
429
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
432
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
443
267
444
268
def timeout_milliseconds(self):
445
269
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
270
return self._timedelta_to_milliseconds(self.timeout)
451
271
452
272
def interval_milliseconds(self):
453
273
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
274
return self._timedelta_to_milliseconds(self.interval)
455
275
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
459
@staticmethod
460
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
462
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
464
settings = {}
465
for client_name in config.sections():
466
section = dict(config.items(client_name))
467
client = settings[client_name] = {}
468
469
client["host"] = section["host"]
470
# Reformat values from string types to Python types
471
client["approved_by_default"] = config.getboolean(
472
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
475
client["fingerprint"] = (section["fingerprint"].upper()
476
.replace(" ", ""))
477
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
479
elif "secfile" in section:
480
with open(os.path.expanduser(os.path.expandvars
481
(section["secfile"])),
482
"rb") as secfile:
483
client["secret"] = secfile.read()
484
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
487
client["timeout"] = string_to_delta(section["timeout"])
488
client["extended_timeout"] = string_to_delta(
489
section["extended_timeout"])
490
client["interval"] = string_to_delta(section["interval"])
491
client["approval_delay"] = string_to_delta(
492
section["approval_delay"])
493
client["approval_duration"] = string_to_delta(
494
section["approval_duration"])
495
client["checker_command"] = section["checker"]
496
client["last_approval_request"] = None
497
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
276
def __init__(self, name = None, disable_hook=None, config=None):
511
277
"""Note: the 'checker' key in 'config' sets the
512
278
'checker_command' attribute and *not* the 'checker'
513
279
attribute."""
514
280
self.name = name
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
logger.debug("Creating client %r", self.name)
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
520
284
# Uppercase and remove spaces from fingerprint for later
521
285
# comparison purposes with return value from the fingerprint()
522
286
# function
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# attributes specific for this server instance
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
297
else:
298
raise TypeError(u"No secret or secfile for client %s"
299
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
304
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
527
308
self.checker = None
528
309
self.checker_initiator_tag = None
529
310
self.disable_initiator_tag = None
530
311
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
531
313
self.current_checker_command = None
532
self.approved = None
533
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
539
if not attr.startswith("_")]
540
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
546
if not name.startswith("_"):
547
self.client_structure.append(name)
548
549
# Send notice to process children that client state has changed
550
def send_changedstate(self):
551
with self.changedstate:
552
self.changedstate.notify_all()
314
self.last_connect = None
553
315
554
316
def enable(self):
555
317
"""Start this client's checker and timeout hooks"""
556
if getattr(self, "enabled", False):
318
if getattr(self, u"enabled", False):
557
319
# Already enabled
558
320
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
562
321
self.last_enabled = datetime.datetime.utcnow()
563
self.init_checker()
564
565
def disable(self, quiet=True):
566
"""Disable this client."""
567
if not getattr(self, "enabled", False):
568
return False
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
575
self.disable_initiator_tag = None
576
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
579
self.checker_initiator_tag = None
580
self.stop_checker()
581
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
583
return False
584
585
def __del__(self):
586
self.disable()
587
588
def init_checker(self):
589
322
# Schedule a new checker to be started an 'interval' from now,
590
323
# and every interval from then on.
591
324
self.checker_initiator_tag = (gobject.timeout_add
592
325
(self.interval_milliseconds(),
593
326
self.start_checker))
327
# Also start a new checker *right now*.
328
self.start_checker()
594
329
# Schedule a disable() when 'timeout' has passed
595
330
self.disable_initiator_tag = (gobject.timeout_add
596
331
(self.timeout_milliseconds(),
597
332
self.disable))
598
# Also start a new checker *right now*.
599
self.start_checker()
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
338
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
344
gobject.source_remove(self.checker_initiator_tag)
345
self.checker_initiator_tag = None
346
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
350
# Do not run this again if called by a gobject.timeout_add
351
return False
352
353
def __del__(self):
354
self.disable_hook = None
355
self.disable()
600
356
601
357
def checker_callback(self, pid, condition, command):
602
358
"""The checker has completed, so take appropriate actions."""
603
359
self.checker_callback_tag = None
604
360
self.checker = None
605
361
if os.WIFEXITED(condition):
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
609
365
vars(self))
610
366
self.checked_ok()
611
367
else:
612
logger.info("Checker for %(name)s failed",
368
logger.info(u"Checker for %(name)s failed",
613
369
vars(self))
614
370
else:
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
371
logger.warning(u"Checker for %(name)s crashed?",
617
372
vars(self))
618
373
619
def checked_ok(self, timeout=None):
374
def checked_ok(self):
620
375
"""Bump up the timeout for this client.
621
376
622
377
This should only be called when the client has been seen,
623
378
alive and well.
624
379
"""
625
if timeout is None:
626
timeout = self.timeout
627
380
self.last_checked_ok = datetime.datetime.utcnow()
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
634
self.expires = datetime.datetime.utcnow() + timeout
635
636
def need_approval(self):
637
self.last_approval_request = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
638
385
639
386
def start_checker(self):
640
387
"""Start a new checker subprocess if one is not running.
647
394
# client would inevitably timeout, since no checker would get
648
395
# a chance to run to completion. If we instead leave running
649
396
# checkers alone, the checker would have to take more time
650
# than 'timeout' for the client to be disabled, which is as it
651
# should be.
397
# than 'timeout' for the client to be declared invalid, which
398
# is as it should be.
652
399
653
400
# If a checker exists, make sure it is not a zombie
654
401
try:
655
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
403
except (AttributeError, OSError), error:
657
404
if (isinstance(error, OSError)
658
405
and error.errno != errno.ECHILD):
659
406
raise error
660
407
else:
661
408
if pid:
662
logger.warning("Checker was a zombie")
409
logger.warning(u"Checker was a zombie")
663
410
gobject.source_remove(self.checker_callback_tag)
664
411
self.checker_callback(pid, status,
665
412
self.current_checker_command)
670
417
command = self.checker_command % self.host
671
418
except TypeError:
672
419
# Escape attributes for the shell
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
420
escaped_attrs = dict((key,
421
re.escape(unicode(str(val),
422
errors=
423
u'replace')))
424
for key, val in
425
vars(self).iteritems())
681
426
try:
682
427
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
428
except TypeError, error:
429
logger.error(u'Could not format string "%s":'
430
u' %s', self.checker_command, error)
686
431
return True # Try again later
687
432
self.current_checker_command = command
688
433
try:
689
logger.info("Starting checker %r for %s",
434
logger.info(u"Starting checker %r for %s",
690
435
command, self.name)
691
436
# We don't need to redirect stdout and stderr, since
692
437
# in normal mode, that is already done by daemon(),
694
439
# always replaced by /dev/null.)
695
440
self.checker = subprocess.Popen(command,
696
441
close_fds=True,
697
shell=True, cwd="/")
442
shell=True, cwd=u"/")
698
443
self.checker_callback_tag = (gobject.child_watch_add
699
444
(self.checker.pid,
700
445
self.checker_callback,
705
450
if pid:
706
451
gobject.source_remove(self.checker_callback_tag)
707
452
self.checker_callback(pid, status, command)
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
453
except OSError, error:
454
logger.error(u"Failed to start subprocess: %s",
710
455
error)
711
456
# Re-run this periodically if run by gobject.timeout_add
712
457
return True
716
461
if self.checker_callback_tag:
717
462
gobject.source_remove(self.checker_callback_tag)
718
463
self.checker_callback_tag = None
719
if getattr(self, "checker", None) is None:
464
if getattr(self, u"checker", None) is None:
720
465
return
721
logger.debug("Stopping checker for %(name)s", vars(self))
466
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
467
try:
723
468
os.kill(self.checker.pid, signal.SIGTERM)
724
#time.sleep(0.5)
469
#os.sleep(0.5)
725
470
#if self.checker.poll() is None:
726
471
# os.kill(self.checker.pid, signal.SIGKILL)
727
except OSError as error:
472
except OSError, error:
728
473
if error.errno != errno.ESRCH: # No such process
729
474
raise
730
475
self.checker = None
731
732
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
476
477
def still_valid(self):
478
"""Has the timeout not yet passed for this client?"""
479
if not getattr(self, u"enabled", False):
480
return False
481
now = datetime.datetime.utcnow()
482
if self.last_checked_ok is None:
483
return now < (self.created + self.timeout)
484
else:
485
return now < (self.last_checked_ok + self.timeout)
486
487
488
def dbus_service_property(dbus_interface, signature=u"v",
489
access=u"readwrite", byte_arrays=False):
735
490
"""Decorators for marking methods of a DBusObjectWithProperties to
736
491
become properties on the D-Bus.
737
492
742
497
dbus.service.method, except there is only "signature", since the
743
498
type from Get() and the type sent to Set() is the same.
744
499
"""
745
# Encoding deeply encoded byte arrays is not supported yet by the
746
# "Set" method, so we fail early here:
747
if byte_arrays and signature != "ay":
748
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
750
500
def decorator(func):
751
501
func._dbus_is_property = True
752
502
func._dbus_interface = dbus_interface
753
503
func._dbus_signature = signature
754
504
func._dbus_access = access
755
505
func._dbus_name = func.__name__
756
if func._dbus_name.endswith("_dbus_property"):
506
if func._dbus_name.endswith(u"_dbus_property"):
757
507
func._dbus_name = func._dbus_name[:-14]
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
508
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
759
509
return func
760
510
return decorator
761
511
781
531
782
532
class DBusObjectWithProperties(dbus.service.Object):
783
533
"""A D-Bus object with properties.
784
534
785
535
Classes inheriting from this can use the dbus_service_property
786
536
decorator to expose methods as D-Bus properties. It exposes the
787
537
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
539
790
540
@staticmethod
791
541
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
542
return getattr(obj, u"_dbus_is_property", False)
793
543
794
544
def _get_all_dbus_properties(self):
795
545
"""Returns a generator of (name, attribute) pairs
796
546
"""
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
547
return ((prop._dbus_name, prop)
799
548
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
549
inspect.getmembers(self, self._is_dbus_property))
801
550
802
551
def _get_dbus_property(self, interface_name, property_name):
803
552
"""Returns a bound method if one exists which is a D-Bus
804
553
property with the specified name and interface.
805
554
"""
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
809
if (value._dbus_name == property_name
810
and value._dbus_interface == interface_name):
811
return value.__get__(self)
812
555
for name in (property_name,
556
property_name + u"_dbus_property"):
557
prop = getattr(self, name, None)
558
if (prop is None
559
or not self._is_dbus_property(prop)
560
or prop._dbus_name != property_name
561
or (interface_name and prop._dbus_interface
562
and interface_name != prop._dbus_interface)):
563
continue
564
return prop
813
565
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
566
raise DBusPropertyNotFound(self.dbus_object_path + u":"
567
+ interface_name + u"."
816
568
+ property_name)
817
569
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
819
out_signature="v")
570
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
571
out_signature=u"v")
820
572
def Get(self, interface_name, property_name):
821
573
"""Standard D-Bus property Get() method, see D-Bus standard.
822
574
"""
823
575
prop = self._get_dbus_property(interface_name, property_name)
824
if prop._dbus_access == "write":
576
if prop._dbus_access == u"write":
825
577
raise DBusPropertyAccessException(property_name)
826
578
value = prop()
827
if not hasattr(value, "variant_level"):
579
if not hasattr(value, u"variant_level"):
828
580
return value
829
581
return type(value)(value, variant_level=value.variant_level+1)
830
582
831
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
583
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
832
584
def Set(self, interface_name, property_name, value):
833
585
"""Standard D-Bus property Set() method, see D-Bus standard.
834
586
"""
835
587
prop = self._get_dbus_property(interface_name, property_name)
836
if prop._dbus_access == "read":
588
if prop._dbus_access == u"read":
837
589
raise DBusPropertyAccessException(property_name)
838
if prop._dbus_get_args_options["byte_arrays"]:
839
# The byte_arrays option is not supported yet on
840
# signatures other than "ay".
841
if prop._dbus_signature != "ay":
842
raise ValueError
590
if prop._dbus_get_args_options[u"byte_arrays"]:
843
591
value = dbus.ByteArray(''.join(unichr(byte)
844
592
for byte in value))
845
593
prop(value)
846
594
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
848
out_signature="a{sv}")
595
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
596
out_signature=u"a{sv}")
849
597
def GetAll(self, interface_name):
850
598
"""Standard D-Bus property GetAll() method, see D-Bus
851
599
standard.
852
600
853
601
Note: Will not include properties with access="write".
854
602
"""
855
properties = {}
603
all = {}
856
604
for name, prop in self._get_all_dbus_properties():
857
605
if (interface_name
858
606
and interface_name != prop._dbus_interface):
859
607
# Interface non-empty but did not match
860
608
continue
861
609
# Ignore write-only properties
862
if prop._dbus_access == "write":
610
if prop._dbus_access == u"write":
863
611
continue
864
612
value = prop()
865
if not hasattr(value, "variant_level"):
866
properties[name] = value
613
if not hasattr(value, u"variant_level"):
614
all[name] = value
867
615
continue
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
870
return dbus.Dictionary(properties, signature="sv")
616
all[name] = type(value)(value, variant_level=
617
value.variant_level+1)
618
return dbus.Dictionary(all, signature=u"sv")
871
619
872
620
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
out_signature="s",
621
out_signature=u"s",
874
622
path_keyword='object_path',
875
623
connection_keyword='connection')
876
624
def Introspect(self, object_path, connection):
877
625
"""Standard D-Bus method, overloaded to insert property tags.
878
626
"""
879
627
xmlstring = dbus.service.Object.Introspect(self, object_path,
880
connection)
881
try:
882
document = xml.dom.minidom.parseString(xmlstring)
883
def make_tag(document, name, prop):
884
e = document.createElement("property")
885
e.setAttribute("name", name)
886
e.setAttribute("type", prop._dbus_signature)
887
e.setAttribute("access", prop._dbus_access)
888
return e
889
for if_tag in document.getElementsByTagName("interface"):
890
for tag in (make_tag(document, name, prop)
891
for name, prop
892
in self._get_all_dbus_properties()
893
if prop._dbus_interface
894
== if_tag.getAttribute("name")):
895
if_tag.appendChild(tag)
896
# Add the names to the return values for the
897
# "org.freedesktop.DBus.Properties" methods
898
if (if_tag.getAttribute("name")
899
== "org.freedesktop.DBus.Properties"):
900
for cn in if_tag.getElementsByTagName("method"):
901
if cn.getAttribute("name") == "Get":
902
for arg in cn.getElementsByTagName("arg"):
903
if (arg.getAttribute("direction")
904
== "out"):
905
arg.setAttribute("name", "value")
906
elif cn.getAttribute("name") == "GetAll":
907
for arg in cn.getElementsByTagName("arg"):
908
if (arg.getAttribute("direction")
909
== "out"):
910
arg.setAttribute("name", "props")
911
xmlstring = document.toxml("utf-8")
912
document.unlink()
913
except (AttributeError, xml.dom.DOMException,
914
xml.parsers.expat.ExpatError) as error:
915
logger.error("Failed to override Introspection method",
916
error)
628
connection)
629
document = xml.dom.minidom.parseString(xmlstring)
630
del xmlstring
631
def make_tag(document, name, prop):
632
e = document.createElement(u"property")
633
e.setAttribute(u"name", name)
634
e.setAttribute(u"type", prop._dbus_signature)
635
e.setAttribute(u"access", prop._dbus_access)
636
return e
637
for if_tag in document.getElementsByTagName(u"interface"):
638
for tag in (make_tag(document, name, prop)
639
for name, prop
640
in self._get_all_dbus_properties()
641
if prop._dbus_interface
642
== if_tag.getAttribute(u"name")):
643
if_tag.appendChild(tag)
644
xmlstring = document.toxml(u"utf-8")
645
document.unlink()
917
646
return xmlstring
918
647
919
648
920
def datetime_to_dbus (dt, variant_level=0):
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
932
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
940
# Ignore non-D-Bus attributes, and D-Bus attributes
941
# with the wrong interface name
942
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
945
continue
946
# Create an alternate D-Bus interface name based on
947
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
951
# Is this a D-Bus signal?
952
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
956
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
959
# Create a new, but exactly alike, function
960
# object, and decorate it to be a new D-Bus signal
961
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
971
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
974
def fixscope(func1, func2):
975
"""This function is a scope container to pass
976
func1 and func2 to the "call_both" function
977
outside of its arguments"""
978
def call_both(*args, **kwargs):
979
"""This function will emit two D-Bus
980
signals by calling func1 and func2"""
981
func1(*args, **kwargs)
982
func2(*args, **kwargs)
983
return call_both
984
# Create the "call_both" function and add it to
985
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
988
# Is this a D-Bus method?
989
elif getattr(attribute, "_dbus_is_method", False):
990
# Create a new, but exactly alike, function
991
# object. Decorate it to be a new D-Bus method
992
# with the alternate D-Bus interface name. Add it
993
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1004
# Is this a D-Bus property?
1005
elif getattr(attribute, "_dbus_is_property", False):
1006
# Create a new, but exactly alike, function
1007
# object, and decorate it to be a new D-Bus
1008
# property with the alternate D-Bus interface
1009
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1026
649
class ClientDBus(Client, DBusObjectWithProperties):
1027
650
"""A Client class using D-Bus
1028
651
1030
653
dbus_object_path: dbus.ObjectPath
1031
654
bus: dbus.SystemBus()
1032
655
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
1037
656
# dbus.service.Object doesn't use super(), so we can't either.
1038
657
1039
658
def __init__(self, bus = None, *args, **kwargs):
1040
659
self.bus = bus
1041
660
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
1045
661
# Only now, when this client is initialized, can it show up on
1046
662
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
1050
663
self.dbus_object_path = (dbus.ObjectPath
1051
("/clients/" + client_object_name))
664
(u"/clients/"
665
+ self.name.replace(u".", u"_")))
1052
666
DBusObjectWithProperties.__init__(self, self.bus,
1053
667
self.dbus_object_path)
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1058
""" Modify a variable so that it's a property which announces
1059
its changes to DBus.
1060
1061
transform_fun: Function that takes a value and a variant_level
1062
and transforms it to a D-Bus type.
1063
dbus_name: D-Bus name of the variable
1064
type_func: Function that transform the value before sending it
1065
to the D-Bus. Default: no transform
1066
variant_level: D-Bus variant level. Default: 1
1067
"""
1068
attrname = "_{0}".format(dbus_name)
1069
def setter(self, value):
1070
if hasattr(self, "dbus_object_path"):
1071
if (not hasattr(self, attrname) or
1072
type_func(getattr(self, attrname, None))
1073
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1079
setattr(self, attrname, value)
1080
1081
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
"ApprovalPending",
1087
type_func = bool)
1088
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
"LastCheckedOK")
1096
last_approval_request = notifychangeproperty(
1097
datetime_to_dbus, "LastApprovalRequest")
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1104
approval_duration = notifychangeproperty(
1105
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1107
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
extended_timeout = notifychangeproperty(
1112
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1120
del notifychangeproperty
668
669
@staticmethod
670
def _datetime_to_dbus(dt, variant_level=0):
671
"""Convert a UTC datetime.datetime() to a D-Bus type."""
672
return dbus.String(dt.isoformat(),
673
variant_level=variant_level)
674
675
def enable(self):
676
oldstate = getattr(self, u"enabled", False)
677
r = Client.enable(self)
678
if oldstate != self.enabled:
679
# Emit D-Bus signals
680
self.PropertyChanged(dbus.String(u"enabled"),
681
dbus.Boolean(True, variant_level=1))
682
self.PropertyChanged(
683
dbus.String(u"last_enabled"),
684
self._datetime_to_dbus(self.last_enabled,
685
variant_level=1))
686
return r
687
688
def disable(self, signal = True):
689
oldstate = getattr(self, u"enabled", False)
690
r = Client.disable(self)
691
if signal and oldstate != self.enabled:
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"enabled"),
694
dbus.Boolean(False, variant_level=1))
695
return r
1121
696
1122
697
def __del__(self, *args, **kwargs):
1123
698
try:
1124
699
self.remove_from_connection()
1125
700
except LookupError:
1126
701
pass
1127
if hasattr(DBusObjectWithProperties, "__del__"):
702
if hasattr(DBusObjectWithProperties, u"__del__"):
1128
703
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1129
704
Client.__del__(self, *args, **kwargs)
1130
705
1132
707
*args, **kwargs):
1133
708
self.checker_callback_tag = None
1134
709
self.checker = None
710
# Emit D-Bus signal
711
self.PropertyChanged(dbus.String(u"checker_running"),
712
dbus.Boolean(False, variant_level=1))
1135
713
if os.WIFEXITED(condition):
1136
714
exitstatus = os.WEXITSTATUS(condition)
1137
715
# Emit D-Bus signal
1147
725
return Client.checker_callback(self, pid, condition, command,
1148
726
*args, **kwargs)
1149
727
728
def checked_ok(self, *args, **kwargs):
729
r = Client.checked_ok(self, *args, **kwargs)
730
# Emit D-Bus signal
731
self.PropertyChanged(
732
dbus.String(u"last_checked_ok"),
733
(self._datetime_to_dbus(self.last_checked_ok,
734
variant_level=1)))
735
return r
736
1150
737
def start_checker(self, *args, **kwargs):
1151
738
old_checker = self.checker
1152
739
if self.checker is not None:
1159
746
and old_checker_pid != self.checker.pid):
1160
747
# Emit D-Bus signal
1161
748
self.CheckerStarted(self.current_checker_command)
1162
return r
1163
1164
def _reset_approved(self):
1165
self.approved = None
1166
return False
1167
1168
def approve(self, value=True):
1169
self.send_changedstate()
1170
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
749
self.PropertyChanged(
750
dbus.String(u"checker_running"),
751
dbus.Boolean(True, variant_level=1))
752
return r
753
754
def stop_checker(self, *args, **kwargs):
755
old_checker = getattr(self, u"checker", None)
756
r = Client.stop_checker(self, *args, **kwargs)
757
if (old_checker is not None
758
and getattr(self, u"checker", None) is None):
759
self.PropertyChanged(dbus.String(u"checker_running"),
760
dbus.Boolean(False, variant_level=1))
761
return r
762
763
## D-Bus methods & signals
764
_interface = u"se.bsnet.fukt.Mandos.Client"
765
766
# CheckedOK - method
767
@dbus.service.method(_interface)
768
def CheckedOK(self):
769
return self.checked_ok()
1180
770
1181
771
# CheckerCompleted - signal
1182
@dbus.service.signal(_interface, signature="nxs")
772
@dbus.service.signal(_interface, signature=u"nxs")
1183
773
def CheckerCompleted(self, exitcode, waitstatus, command):
1184
774
"D-Bus signal"
1185
775
pass
1186
776
1187
777
# CheckerStarted - signal
1188
@dbus.service.signal(_interface, signature="s")
778
@dbus.service.signal(_interface, signature=u"s")
1189
779
def CheckerStarted(self, command):
1190
780
"D-Bus signal"
1191
781
pass
1192
782
1193
783
# PropertyChanged - signal
1194
@dbus.service.signal(_interface, signature="sv")
784
@dbus.service.signal(_interface, signature=u"sv")
1195
785
def PropertyChanged(self, property, value):
1196
786
"D-Bus signal"
1197
787
pass
1198
788
1199
# GotSecret - signal
789
# ReceivedSecret - signal
1200
790
@dbus.service.signal(_interface)
1201
def GotSecret(self):
1202
"""D-Bus signal
1203
Is sent after a successful transfer of secret from the Mandos
1204
server to mandos-client
1205
"""
791
def ReceivedSecret(self):
792
"D-Bus signal"
1206
793
pass
1207
794
1208
795
# Rejected - signal
1209
@dbus.service.signal(_interface, signature="s")
1210
def Rejected(self, reason):
1211
"D-Bus signal"
1212
pass
1213
1214
# NeedApproval - signal
1215
@dbus.service.signal(_interface, signature="tb")
1216
def NeedApproval(self, timeout, default):
1217
"D-Bus signal"
1218
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1230
# Approve - method
1231
@dbus.service.method(_interface, in_signature="b")
1232
def Approve(self, value):
1233
self.approve(value)
1234
1235
# CheckedOK - method
1236
@dbus.service.method(_interface)
1237
def CheckedOK(self):
1238
self.checked_ok()
796
@dbus.service.signal(_interface)
797
def Rejected(self):
798
"D-Bus signal"
799
pass
1239
800
1240
801
# Enable - method
1241
802
@dbus.service.method(_interface)
1260
821
def StopChecker(self):
1261
822
self.stop_checker()
1262
823
1263
## Properties
1264
1265
# ApprovalPending - property
1266
@dbus_service_property(_interface, signature="b", access="read")
1267
def ApprovalPending_dbus_property(self):
1268
return dbus.Boolean(bool(self.approvals_pending))
1269
1270
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
1272
access="readwrite")
1273
def ApprovedByDefault_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.Boolean(self.approved_by_default)
1276
self.approved_by_default = bool(value)
1277
1278
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ApprovalDelay_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
1286
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDuration_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
1295
# Name - property
1296
@dbus_service_property(_interface, signature="s", access="read")
1297
def Name_dbus_property(self):
824
# name - property
825
@dbus_service_property(_interface, signature=u"s", access=u"read")
826
def name_dbus_property(self):
1298
827
return dbus.String(self.name)
1299
828
1300
# Fingerprint - property
1301
@dbus_service_property(_interface, signature="s", access="read")
1302
def Fingerprint_dbus_property(self):
829
# fingerprint - property
830
@dbus_service_property(_interface, signature=u"s", access=u"read")
831
def fingerprint_dbus_property(self):
1303
832
return dbus.String(self.fingerprint)
1304
833
1305
# Host - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def Host_dbus_property(self, value=None):
834
# host - property
835
@dbus_service_property(_interface, signature=u"s",
836
access=u"readwrite")
837
def host_dbus_property(self, value=None):
1309
838
if value is None: # get
1310
839
return dbus.String(self.host)
1311
self.host = unicode(value)
1312
1313
# Created - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def Created_dbus_property(self):
1316
return datetime_to_dbus(self.created)
1317
1318
# LastEnabled - property
1319
@dbus_service_property(_interface, signature="s", access="read")
1320
def LastEnabled_dbus_property(self):
1321
return datetime_to_dbus(self.last_enabled)
1322
1323
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
1325
access="readwrite")
1326
def Enabled_dbus_property(self, value=None):
840
self.host = value
841
# Emit D-Bus signal
842
self.PropertyChanged(dbus.String(u"host"),
843
dbus.String(value, variant_level=1))
844
845
# created - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def created_dbus_property(self):
848
return dbus.String(self._datetime_to_dbus(self.created))
849
850
# last_enabled - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def last_enabled_dbus_property(self):
853
if self.last_enabled is None:
854
return dbus.String(u"")
855
return dbus.String(self._datetime_to_dbus(self.last_enabled))
856
857
# enabled - property
858
@dbus_service_property(_interface, signature=u"b",
859
access=u"readwrite")
860
def enabled_dbus_property(self, value=None):
1327
861
if value is None: # get
1328
862
return dbus.Boolean(self.enabled)
1329
863
if value:
1331
865
else:
1332
866
self.disable()
1333
867
1334
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
1336
access="readwrite")
1337
def LastCheckedOK_dbus_property(self, value=None):
868
# last_checked_ok - property
869
@dbus_service_property(_interface, signature=u"s",
870
access=u"readwrite")
871
def last_checked_ok_dbus_property(self, value=None):
1338
872
if value is not None:
1339
873
self.checked_ok()
1340
874
return
1341
return datetime_to_dbus(self.last_checked_ok)
1342
1343
# Expires - property
1344
@dbus_service_property(_interface, signature="s", access="read")
1345
def Expires_dbus_property(self):
1346
return datetime_to_dbus(self.expires)
1347
1348
# LastApprovalRequest - property
1349
@dbus_service_property(_interface, signature="s", access="read")
1350
def LastApprovalRequest_dbus_property(self):
1351
return datetime_to_dbus(self.last_approval_request)
1352
1353
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
1355
access="readwrite")
1356
def Timeout_dbus_property(self, value=None):
875
if self.last_checked_ok is None:
876
return dbus.String(u"")
877
return dbus.String(self._datetime_to_dbus(self
878
.last_checked_ok))
879
880
# timeout - property
881
@dbus_service_property(_interface, signature=u"t",
882
access=u"readwrite")
883
def timeout_dbus_property(self, value=None):
1357
884
if value is None: # get
1358
885
return dbus.UInt64(self.timeout_milliseconds())
1359
886
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
887
# Emit D-Bus signal
888
self.PropertyChanged(dbus.String(u"timeout"),
889
dbus.UInt64(value, variant_level=1))
890
if getattr(self, u"disable_initiator_tag", None) is None:
1361
891
return
1362
892
# Reschedule timeout
1363
893
gobject.source_remove(self.disable_initiator_tag)
1364
894
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
895
time_to_die = (self.
896
_timedelta_to_milliseconds((self
897
.last_checked_ok
898
+ self.timeout)
899
- datetime.datetime
900
.utcnow()))
1371
901
if time_to_die <= 0:
1372
902
# The timeout has passed
1373
903
self.disable()
1374
904
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
905
self.disable_initiator_tag = (gobject.timeout_add
1379
906
(time_to_die, self.disable))
1380
907
1381
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
1383
access="readwrite")
1384
def ExtendedTimeout_dbus_property(self, value=None):
1385
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
1389
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def Interval_dbus_property(self, value=None):
908
# interval - property
909
@dbus_service_property(_interface, signature=u"t",
910
access=u"readwrite")
911
def interval_dbus_property(self, value=None):
1393
912
if value is None: # get
1394
913
return dbus.UInt64(self.interval_milliseconds())
1395
914
self.interval = datetime.timedelta(0, 0, 0, value)
1396
if getattr(self, "checker_initiator_tag", None) is None:
915
# Emit D-Bus signal
916
self.PropertyChanged(dbus.String(u"interval"),
917
dbus.UInt64(value, variant_level=1))
918
if getattr(self, u"checker_initiator_tag", None) is None:
1397
919
return
1398
if self.enabled:
1399
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
1405
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
1407
access="readwrite")
1408
def Checker_dbus_property(self, value=None):
920
# Reschedule checker run
921
gobject.source_remove(self.checker_initiator_tag)
922
self.checker_initiator_tag = (gobject.timeout_add
923
(value, self.start_checker))
924
self.start_checker() # Start one now, too
925
926
# checker - property
927
@dbus_service_property(_interface, signature=u"s",
928
access=u"readwrite")
929
def checker_dbus_property(self, value=None):
1409
930
if value is None: # get
1410
931
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
932
self.checker_command = value
933
# Emit D-Bus signal
934
self.PropertyChanged(dbus.String(u"checker"),
935
dbus.String(self.checker_command,
936
variant_level=1))
1412
937
1413
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
1415
access="readwrite")
1416
def CheckerRunning_dbus_property(self, value=None):
938
# checker_running - property
939
@dbus_service_property(_interface, signature=u"b",
940
access=u"readwrite")
941
def checker_running_dbus_property(self, value=None):
1417
942
if value is None: # get
1418
943
return dbus.Boolean(self.checker is not None)
1419
944
if value:
1421
946
else:
1422
947
self.stop_checker()
1423
948
1424
# ObjectPath - property
1425
@dbus_service_property(_interface, signature="o", access="read")
1426
def ObjectPath_dbus_property(self):
949
# object_path - property
950
@dbus_service_property(_interface, signature=u"o", access=u"read")
951
def object_path_dbus_property(self):
1427
952
return self.dbus_object_path # is already a dbus.ObjectPath
1428
953
1429
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
1432
def Secret_dbus_property(self, value):
954
# secret = property
955
@dbus_service_property(_interface, signature=u"ay",
956
access=u"write", byte_arrays=True)
957
def secret_dbus_property(self, value):
1433
958
self.secret = str(value)
1434
959
1435
960
del _interface
1436
961
1437
962
1438
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
1440
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
1442
if not self._pipe.recv():
1443
raise KeyError()
1444
1445
def __getattribute__(self, name):
1446
if name == '_pipe':
1447
return super(ProxyClient, self).__getattribute__(name)
1448
self._pipe.send(('getattr', name))
1449
data = self._pipe.recv()
1450
if data[0] == 'data':
1451
return data[1]
1452
if data[0] == 'function':
1453
def func(*args, **kwargs):
1454
self._pipe.send(('funcall', name, args, kwargs))
1455
return self._pipe.recv()[1]
1456
return func
1457
1458
def __setattr__(self, name, value):
1459
if name == '_pipe':
1460
return super(ProxyClient, self).__setattr__(name, value)
1461
self._pipe.send(('setattr', name, value))
1462
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
1468
963
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
964
"""A class to handle client connections.
1470
965
1472
967
Note: This will run in its own forked process."""
1473
968
1474
969
def handle(self):
1475
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
1478
logger.debug("Pipe FD: %d",
1479
self.server.child_pipe.fileno())
1480
970
logger.info(u"TCP connection from: %s",
971
unicode(self.client_address))
972
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
973
# Open IPC pipe to parent process
974
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1481
975
session = (gnutls.connection
1482
976
.ClientSession(self.request,
1483
977
gnutls.connection
1484
978
.X509Credentials()))
1485
979
980
line = self.request.makefile().readline()
981
logger.debug(u"Protocol version: %r", line)
982
try:
983
if int(line.strip().split()[0]) > 1:
984
raise RuntimeError
985
except (ValueError, IndexError, RuntimeError), error:
986
logger.error(u"Unknown protocol version: %s", error)
987
return
988
1486
989
# Note: gnutls.connection.X509Credentials is really a
1487
990
# generic GnuTLS certificate credentials object so long as
1488
991
# no X.509 keys are added to it. Therefore, we can use it
1489
992
# here despite using OpenPGP certificates.
1490
993
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
994
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
995
# u"+AES-256-CBC", u"+SHA1",
996
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
997
# u"+DHE-DSS"))
1495
998
# Use a fallback default, since this MUST be set.
1496
999
priority = self.server.gnutls_priority
1497
1000
if priority is None:
1498
priority = "NORMAL"
1001
priority = u"NORMAL"
1499
1002
(gnutls.library.functions
1500
1003
.gnutls_priority_set_direct(session._c_object,
1501
1004
priority, None))
1502
1005
1503
# Start communication using the Mandos protocol
1504
# Get protocol number
1505
line = self.request.makefile().readline()
1506
logger.debug("Protocol version: %r", line)
1507
try:
1508
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
1510
except (ValueError, IndexError, RuntimeError) as error:
1511
logger.error("Unknown protocol version: %s", error)
1512
return
1513
1514
# Start GnuTLS connection
1515
1006
try:
1516
1007
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
1008
except gnutls.errors.GNUTLSError, error:
1009
logger.warning(u"Handshake failed: %s", error)
1519
1010
# Do not run session.bye() here: the session is not
1520
1011
# established. Just abandon the request.
1521
1012
return
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
1013
logger.debug(u"Handshake succeeded")
1525
1014
try:
1526
try:
1527
fpr = self.fingerprint(self.peer_certificate
1528
(session))
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
1537
self.client_address)
1538
except KeyError:
1539
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1545
if client.approval_delay:
1546
delay = client.approval_delay
1547
client.approvals_pending += 1
1548
approval_required = True
1549
1550
while True:
1551
if not client.enabled:
1552
logger.info("Client %s is disabled",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Disabled")
1557
return
1558
1559
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
1561
break
1562
elif client.approved is None:
1563
logger.info("Client %s needs approval",
1564
client.name)
1565
if self.server.use_dbus:
1566
# Emit D-Bus signal
1567
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1570
else:
1571
logger.warning("Client %s was not approved",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.Rejected("Denied")
1576
return
1577
1578
#wait until timeout or approved
1579
time = datetime.datetime.now()
1580
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1584
client.changedstate.release()
1585
time2 = datetime.datetime.now()
1586
if (time2 - time) >= delay:
1587
if not client.approved_by_default:
1588
logger.warning("Client %s timed out while"
1589
" waiting for approval",
1590
client.name)
1591
if self.server.use_dbus:
1592
# Emit D-Bus signal
1593
client.Rejected("Approval timed out")
1594
return
1595
else:
1596
break
1597
else:
1598
delay -= time2 - time
1599
1600
sent_size = 0
1601
while sent_size < len(client.secret):
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
1610
sent_size += sent
1611
1612
logger.info("Sending secret to %s", client.name)
1613
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
1615
if self.server.use_dbus:
1616
# Emit D-Bus signal
1617
client.GotSecret()
1015
fpr = self.fingerprint(self.peer_certificate(session))
1016
except (TypeError, gnutls.errors.GNUTLSError), error:
1017
logger.warning(u"Bad certificate: %s", error)
1018
session.bye()
1019
return
1020
logger.debug(u"Fingerprint: %s", fpr)
1618
1021
1619
finally:
1620
if approval_required:
1621
client.approvals_pending -= 1
1622
try:
1623
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
1022
for c in self.server.clients:
1023
if c.fingerprint == fpr:
1024
client = c
1025
break
1026
else:
1027
ipc.write(u"NOTFOUND %s %s\n"
1028
% (fpr, unicode(self.client_address)))
1029
session.bye()
1030
return
1031
# Have to check if client.still_valid(), since it is
1032
# possible that the client timed out while establishing
1033
# the GnuTLS session.
1034
if not client.still_valid():
1035
ipc.write(u"INVALID %s\n" % client.name)
1036
session.bye()
1037
return
1038
ipc.write(u"SENDING %s\n" % client.name)
1039
sent_size = 0
1040
while sent_size < len(client.secret):
1041
sent = session.send(client.secret[sent_size:])
1042
logger.debug(u"Sent: %d, remaining: %d",
1043
sent, len(client.secret)
1044
- (sent_size + sent))
1045
sent_size += sent
1046
session.bye()
1626
1047
1627
1048
@staticmethod
1628
1049
def peer_certificate(session):
1638
1059
.gnutls_certificate_get_peers
1639
1060
(session._c_object, ctypes.byref(list_size)))
1640
1061
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
1062
raise gnutls.errors.GNUTLSError(u"error getting peer"
1063
u" certificate")
1643
1064
if list_size.value == 0:
1644
1065
return None
1645
1066
cert = cert_list[0]
1671
1092
if crtverify.value != 0:
1672
1093
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
1094
raise (gnutls.errors.CertificateSecurityError
1674
("Verify failed"))
1095
(u"Verify failed"))
1675
1096
# New buffer for the fingerprint
1676
1097
buf = ctypes.create_string_buffer(20)
1677
1098
buf_len = ctypes.c_size_t()
1684
1105
# Convert the buffer to a Python bytestring
1685
1106
fpr = ctypes.string_at(buf, buf_len.value)
1686
1107
# Convert the bytestring to hexadecimal notation
1687
hex_fpr = binascii.hexlify(fpr).upper()
1108
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1688
1109
return hex_fpr
1689
1110
1690
1111
1691
class MultiprocessingMixIn(object):
1692
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
def sub_process_main(self, request, address):
1694
try:
1695
self.finish_request(request, address)
1696
except Exception:
1697
self.handle_error(request, address)
1698
self.close_request(request)
1699
1700
def process_request(self, request, address):
1701
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
1705
proc.start()
1706
return proc
1707
1708
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
""" adds a pipe to the MixIn """
1112
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1113
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1711
1114
def process_request(self, request, client_address):
1712
1115
"""Overrides and wraps the original process_request().
1713
1116
1714
1117
This function creates a new pipe in self.pipe
1715
1118
"""
1716
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
1718
proc = MultiprocessingMixIn.process_request(self, request,
1719
client_address)
1720
self.child_pipe.close()
1721
self.add_pipe(parent_pipe, proc)
1722
1723
def add_pipe(self, parent_pipe, proc):
1119
self.pipe = os.pipe()
1120
super(ForkingMixInWithPipe,
1121
self).process_request(request, client_address)
1122
os.close(self.pipe[1]) # close write end
1123
self.add_pipe(self.pipe[0])
1124
def add_pipe(self, pipe):
1724
1125
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1126
os.close(pipe)
1127
1128
1129
class IPv6_TCPServer(ForkingMixInWithPipe,
1729
1130
socketserver.TCPServer, object):
1730
1131
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1731
1132
1747
1148
bind to an address or port if they were not specified."""
1748
1149
if self.interface is not None:
1749
1150
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1151
logger.error(u"SO_BINDTODEVICE does not exist;"
1152
u" cannot bind to interface %s",
1752
1153
self.interface)
1753
1154
else:
1754
1155
try:
1755
1156
self.socket.setsockopt(socket.SOL_SOCKET,
1756
1157
SO_BINDTODEVICE,
1757
1158
str(self.interface
1758
+ '\0'))
1759
except socket.error as error:
1159
+ u'\0'))
1160
except socket.error, error:
1760
1161
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1162
logger.error(u"No permission to"
1163
u" bind to interface %s",
1763
1164
self.interface)
1764
1165
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
1166
logger.error(u"SO_BINDTODEVICE not available;"
1167
u" cannot bind to interface %s",
1767
1168
self.interface)
1768
1169
else:
1769
1170
raise
1771
1172
if self.server_address[0] or self.server_address[1]:
1772
1173
if not self.server_address[0]:
1773
1174
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
1175
any_address = u"::" # in6addr_any
1775
1176
else:
1776
1177
any_address = socket.INADDR_ANY
1777
1178
self.server_address = (any_address,
1804
1205
self.enabled = False
1805
1206
self.clients = clients
1806
1207
if self.clients is None:
1807
self.clients = {}
1208
self.clients = set()
1808
1209
self.use_dbus = use_dbus
1809
1210
self.gnutls_priority = gnutls_priority
1810
1211
IPv6_TCPServer.__init__(self, server_address,
1814
1215
def server_activate(self):
1815
1216
if self.enabled:
1816
1217
return socketserver.TCPServer.server_activate(self)
1817
1818
1218
def enable(self):
1819
1219
self.enabled = True
1820
1821
def add_pipe(self, parent_pipe, proc):
1220
def add_pipe(self, pipe):
1822
1221
# Call "handle_ipc" for both data and EOF events
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1222
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1223
self.handle_ipc)
1224
def handle_ipc(self, source, condition, file_objects={}):
1832
1225
condition_names = {
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1226
gobject.IO_IN: u"IN", # There is data to read.
1227
gobject.IO_OUT: u"OUT", # Data can be written (without
1835
1228
# blocking).
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1229
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1230
gobject.IO_ERR: u"ERR", # Error condition.
1231
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1839
1232
# broken, usually for pipes and
1840
1233
# sockets).
1841
1234
}
1843
1236
for cond, name in
1844
1237
condition_names.iteritems()
1845
1238
if cond & condition)
1846
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1848
# Wait for other process to exit
1849
proc.join()
1850
return False
1851
1852
# Read a request from the child
1853
request = parent_pipe.recv()
1854
command = request[0]
1855
1856
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
1862
client = c
1863
break
1864
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
1867
if self.use_dbus:
1868
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
1870
address[0])
1871
parent_pipe.send(False)
1872
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
1882
parent_pipe.send(True)
1883
# remove the old hook in favor of the new above hook on
1884
# same fileno
1885
return False
1886
if command == 'funcall':
1887
funcname = request[1]
1888
args = request[2]
1889
kwargs = request[3]
1890
1891
parent_pipe.send(('data', getattr(client_object,
1892
funcname)(*args,
1893
**kwargs)))
1894
1895
if command == 'getattr':
1896
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
1899
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
1903
if command == 'setattr':
1904
attrname = request[1]
1905
value = request[2]
1906
setattr(client_object, attrname, value)
1907
1239
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1240
conditions_string)
1241
1242
# Turn the pipe file descriptor into a Python file object
1243
if source not in file_objects:
1244
file_objects[source] = os.fdopen(source, u"r", 1)
1245
1246
# Read a line from the file object
1247
cmdline = file_objects[source].readline()
1248
if not cmdline: # Empty line means end of file
1249
# close the IPC pipe
1250
file_objects[source].close()
1251
del file_objects[source]
1252
1253
# Stop calling this function
1254
return False
1255
1256
logger.debug(u"IPC command: %r", cmdline)
1257
1258
# Parse and act on command
1259
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1260
1261
if cmd == u"NOTFOUND":
1262
logger.warning(u"Client not found for fingerprint: %s",
1263
args)
1264
if self.use_dbus:
1265
# Emit D-Bus signal
1266
mandos_dbus_service.ClientNotFound(args)
1267
elif cmd == u"INVALID":
1268
for client in self.clients:
1269
if client.name == args:
1270
logger.warning(u"Client %s is invalid", args)
1271
if self.use_dbus:
1272
# Emit D-Bus signal
1273
client.Rejected()
1274
break
1275
else:
1276
logger.error(u"Unknown client %s is invalid", args)
1277
elif cmd == u"SENDING":
1278
for client in self.clients:
1279
if client.name == args:
1280
logger.info(u"Sending secret to %s", client.name)
1281
client.checked_ok()
1282
if self.use_dbus:
1283
# Emit D-Bus signal
1284
client.ReceivedSecret()
1285
break
1286
else:
1287
logger.error(u"Sending secret to unknown client %s",
1288
args)
1289
else:
1290
logger.error(u"Unknown IPC command: %r", cmdline)
1291
1292
# Keep calling this function
1908
1293
return True
1909
1294
1910
1295
1911
1296
def string_to_delta(interval):
1912
1297
"""Parse a string and return a datetime.timedelta
1913
1298
1914
>>> string_to_delta('7d')
1299
>>> string_to_delta(u'7d')
1915
1300
datetime.timedelta(7)
1916
>>> string_to_delta('60s')
1301
>>> string_to_delta(u'60s')
1917
1302
datetime.timedelta(0, 60)
1918
>>> string_to_delta('60m')
1303
>>> string_to_delta(u'60m')
1919
1304
datetime.timedelta(0, 3600)
1920
>>> string_to_delta('24h')
1305
>>> string_to_delta(u'24h')
1921
1306
datetime.timedelta(1)
1922
>>> string_to_delta('1w')
1307
>>> string_to_delta(u'1w')
1923
1308
datetime.timedelta(7)
1924
>>> string_to_delta('5m 30s')
1309
>>> string_to_delta(u'5m 30s')
1925
1310
datetime.timedelta(0, 330)
1926
1311
"""
1927
1312
timevalue = datetime.timedelta(0)
1929
1314
try:
1930
1315
suffix = unicode(s[-1])
1931
1316
value = int(s[:-1])
1932
if suffix == "d":
1317
if suffix == u"d":
1933
1318
delta = datetime.timedelta(value)
1934
elif suffix == "s":
1319
elif suffix == u"s":
1935
1320
delta = datetime.timedelta(0, value)
1936
elif suffix == "m":
1321
elif suffix == u"m":
1937
1322
delta = datetime.timedelta(0, 0, 0, 0, value)
1938
elif suffix == "h":
1323
elif suffix == u"h":
1939
1324
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1940
elif suffix == "w":
1325
elif suffix == u"w":
1941
1326
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1942
1327
else:
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1328
raise ValueError
1329
except (ValueError, IndexError):
1330
raise ValueError
1946
1331
timevalue += delta
1947
1332
return timevalue
1948
1333
1949
1334
1335
def if_nametoindex(interface):
1336
"""Call the C function if_nametoindex(), or equivalent
1337
1338
Note: This function cannot accept a unicode string."""
1339
global if_nametoindex
1340
try:
1341
if_nametoindex = (ctypes.cdll.LoadLibrary
1342
(ctypes.util.find_library(u"c"))
1343
.if_nametoindex)
1344
except (OSError, AttributeError):
1345
logger.warning(u"Doing if_nametoindex the hard way")
1346
def if_nametoindex(interface):
1347
"Get an interface index the hard way, i.e. using fcntl()"
1348
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1349
with closing(socket.socket()) as s:
1350
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1351
struct.pack(str(u"16s16x"),
1352
interface))
1353
interface_index = struct.unpack(str(u"I"),
1354
ifreq[16:20])[0]
1355
return interface_index
1356
return if_nametoindex(interface)
1357
1358
1950
1359
def daemon(nochdir = False, noclose = False):
1951
1360
"""See daemon(3). Standard BSD Unix function.
1952
1361
1955
1364
sys.exit()
1956
1365
os.setsid()
1957
1366
if not nochdir:
1958
os.chdir("/")
1367
os.chdir(u"/")
1959
1368
if os.fork():
1960
1369
sys.exit()
1961
1370
if not noclose:
1963
1372
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1964
1373
if not stat.S_ISCHR(os.fstat(null).st_mode):
1965
1374
raise OSError(errno.ENODEV,
1966
"%s not a character device"
1967
% os.path.devnull)
1375
u"/dev/null not a character device")
1968
1376
os.dup2(null, sys.stdin.fileno())
1969
1377
os.dup2(null, sys.stdout.fileno())
1970
1378
os.dup2(null, sys.stderr.fileno())
1977
1385
##################################################################
1978
1386
# Parsing of options, both command line and config file
1979
1387
1980
parser = argparse.ArgumentParser()
1981
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
1983
help="show version number and exit")
1984
parser.add_argument("-i", "--interface", metavar="IF",
1985
help="Bind to interface IF")
1986
parser.add_argument("-a", "--address",
1987
help="Address to listen for requests on")
1988
parser.add_argument("-p", "--port", type=int,
1989
help="Port number to receive requests on")
1990
parser.add_argument("--check", action="store_true",
1991
help="Run self-test")
1992
parser.add_argument("--debug", action="store_true",
1993
help="Debug mode; run in foreground and log"
1994
" to terminal")
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
help="Debug level for stdout output")
1997
parser.add_argument("--priority", help="GnuTLS"
1998
" priority string (see GnuTLS documentation)")
1999
parser.add_argument("--servicename",
2000
metavar="NAME", help="Zeroconf service name")
2001
parser.add_argument("--configdir",
2002
default="/etc/mandos", metavar="DIR",
2003
help="Directory to search for configuration"
2004
" files")
2005
parser.add_argument("--no-dbus", action="store_false",
2006
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2008
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2010
parser.add_argument("--no-restore", action="store_false",
2011
dest="restore", help="Do not restore stored"
2012
" state")
2013
parser.add_argument("--statedir", metavar="DIR",
2014
help="Directory to save/restore state in")
2015
2016
options = parser.parse_args()
1388
parser = optparse.OptionParser(version = "%%prog %s" % version)
1389
parser.add_option("-i", u"--interface", type=u"string",
1390
metavar="IF", help=u"Bind to interface IF")
1391
parser.add_option("-a", u"--address", type=u"string",
1392
help=u"Address to listen for requests on")
1393
parser.add_option("-p", u"--port", type=u"int",
1394
help=u"Port number to receive requests on")
1395
parser.add_option("--check", action=u"store_true",
1396
help=u"Run self-test")
1397
parser.add_option("--debug", action=u"store_true",
1398
help=u"Debug mode; run in foreground and log to"
1399
u" terminal")
1400
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1401
u" priority string (see GnuTLS documentation)")
1402
parser.add_option("--servicename", type=u"string",
1403
metavar=u"NAME", help=u"Zeroconf service name")
1404
parser.add_option("--configdir", type=u"string",
1405
default=u"/etc/mandos", metavar=u"DIR",
1406
help=u"Directory to search for configuration"
1407
u" files")
1408
parser.add_option("--no-dbus", action=u"store_false",
1409
dest=u"use_dbus", help=u"Do not provide D-Bus"
1410
u" system bus interface")
1411
parser.add_option("--no-ipv6", action=u"store_false",
1412
dest=u"use_ipv6", help=u"Do not use IPv6")
1413
options = parser.parse_args()[0]
2017
1414
2018
1415
if options.check:
2019
1416
import doctest
2021
1418
sys.exit()
2022
1419
2023
1420
# Default values for config file for server-global settings
2024
server_defaults = { "interface": "",
2025
"address": "",
2026
"port": "",
2027
"debug": "False",
2028
"priority":
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
1421
server_defaults = { u"interface": u"",
1422
u"address": u"",
1423
u"port": u"",
1424
u"debug": u"False",
1425
u"priority":
1426
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1427
u"servicename": u"Mandos",
1428
u"use_dbus": u"True",
1429
u"use_ipv6": u"True",
2036
1430
}
2037
1431
2038
1432
# Parse config file for server-global settings
2039
1433
server_config = configparser.SafeConfigParser(server_defaults)
2040
1434
del server_defaults
2041
1435
server_config.read(os.path.join(options.configdir,
2042
"mandos.conf"))
1436
u"mandos.conf"))
2043
1437
# Convert the SafeConfigParser object to a dict
2044
1438
server_settings = server_config.defaults()
2045
1439
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
1440
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1441
server_settings[option] = server_config.getboolean(u"DEFAULT",
2048
1442
option)
2049
1443
if server_settings["port"]:
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
1444
server_settings["port"] = server_config.getint(u"DEFAULT",
1445
u"port")
2052
1446
del server_config
2053
1447
2054
1448
# Override the settings from the config file with command line
2055
1449
# options, if set.
2056
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
1450
for option in (u"interface", u"address", u"port", u"debug",
1451
u"priority", u"servicename", u"configdir",
1452
u"use_dbus", u"use_ipv6"):
2060
1453
value = getattr(options, option)
2061
1454
if value is not None:
2062
1455
server_settings[option] = value
2070
1463
##################################################################
2071
1464
2072
1465
# For convenience
2073
debug = server_settings["debug"]
2074
debuglevel = server_settings["debuglevel"]
2075
use_dbus = server_settings["use_dbus"]
2076
use_ipv6 = server_settings["use_ipv6"]
2077
stored_state_path = os.path.join(server_settings["statedir"],
2078
stored_state_file)
2079
2080
if debug:
2081
initlogger(logging.DEBUG)
2082
else:
2083
if not debuglevel:
2084
initlogger()
2085
else:
2086
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
2088
2089
if server_settings["servicename"] != "Mandos":
1466
debug = server_settings[u"debug"]
1467
use_dbus = server_settings[u"use_dbus"]
1468
use_ipv6 = server_settings[u"use_ipv6"]
1469
1470
if not debug:
1471
syslogger.setLevel(logging.WARNING)
1472
console.setLevel(logging.WARNING)
1473
1474
if server_settings[u"servicename"] != u"Mandos":
2090
1475
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
1476
(u'Mandos (%s) [%%(process)d]:'
1477
u' %%(levelname)s: %%(message)s'
1478
% server_settings[u"servicename"]))
2094
1479
2095
1480
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
2097
client_config.read(os.path.join(server_settings["configdir"],
2098
"clients.conf"))
1481
client_defaults = { u"timeout": u"1h",
1482
u"interval": u"5m",
1483
u"checker": u"fping -q -- %%(host)s",
1484
u"host": u"",
1485
}
1486
client_config = configparser.SafeConfigParser(client_defaults)
1487
client_config.read(os.path.join(server_settings[u"configdir"],
1488
u"clients.conf"))
2099
1489
2100
1490
global mandos_dbus_service
2101
1491
mandos_dbus_service = None
2102
1492
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
1493
tcp_server = MandosServer((server_settings[u"address"],
1494
server_settings[u"port"]),
2105
1495
ClientHandler,
2106
interface=(server_settings["interface"]
2107
or None),
1496
interface=server_settings[u"interface"],
2108
1497
use_ipv6=use_ipv6,
2109
1498
gnutls_priority=
2110
server_settings["priority"],
1499
server_settings[u"priority"],
2111
1500
use_dbus=use_dbus)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
1501
pidfilename = u"/var/run/mandos.pid"
1502
try:
1503
pidfile = open(pidfilename, u"w")
1504
except IOError:
1505
logger.error(u"Could not open file %r", pidfilename)
2118
1506
2119
1507
try:
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
1508
uid = pwd.getpwnam(u"_mandos").pw_uid
1509
gid = pwd.getpwnam(u"_mandos").pw_gid
2122
1510
except KeyError:
2123
1511
try:
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
1512
uid = pwd.getpwnam(u"mandos").pw_uid
1513
gid = pwd.getpwnam(u"mandos").pw_gid
2126
1514
except KeyError:
2127
1515
try:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
1516
uid = pwd.getpwnam(u"nobody").pw_uid
1517
gid = pwd.getpwnam(u"nobody").pw_gid
2130
1518
except KeyError:
2131
1519
uid = 65534
2132
1520
gid = 65534
2133
1521
try:
2134
1522
os.setgid(gid)
2135
1523
os.setuid(uid)
2136
except OSError as error:
1524
except OSError, error:
2137
1525
if error[0] != errno.EPERM:
2138
1526
raise error
2139
1527
1528
# Enable all possible GnuTLS debugging
2140
1529
if debug:
2141
# Enable all possible GnuTLS debugging
2142
2143
1530
# "Use a log level over 10 to enable all debugging options."
2144
1531
# - GnuTLS manual
2145
1532
gnutls.library.functions.gnutls_global_set_log_level(11)
2146
1533
2147
1534
@gnutls.library.types.gnutls_log_func
2148
1535
def debug_gnutls(level, string):
2149
logger.debug("GnuTLS: %s", string[:-1])
1536
logger.debug(u"GnuTLS: %s", string[:-1])
2150
1537
2151
1538
(gnutls.library.functions
2152
1539
.gnutls_global_set_log_function(debug_gnutls))
2153
2154
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2156
os.dup2(null, sys.stdin.fileno())
2157
if null > 2:
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
2163
# Need to fork before connecting to D-Bus
2164
if not debug:
2165
# Close all input and output, do double fork, etc.
2166
daemon()
2167
1540
2168
1541
global main_loop
2169
1542
# From the Avahi example code
2172
1545
bus = dbus.SystemBus()
2173
1546
# End of Avahi example code
2174
1547
if use_dbus:
2175
try:
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
2183
use_dbus = False
2184
server_settings["use_dbus"] = False
2185
tcp_server.use_dbus = False
1548
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2186
1549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1550
service = AvahiService(name = server_settings[u"servicename"],
1551
servicetype = u"_mandos._tcp",
1552
protocol = protocol, bus = bus)
2191
1553
if server_settings["interface"]:
2192
1554
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1555
(str(server_settings[u"interface"])))
2197
1556
2198
1557
client_class = Client
2199
1558
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
2220
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
2222
# Decide which value to use after restoring saved state.
2223
# We have three different values: Old config file,
2224
# new config file, and saved state.
2225
# New config value takes precedence if it differs from old
2226
# config value, otherwise use saved state.
2227
for name, value in client_settings[client_name].items():
2228
try:
2229
# For each value in new config, check if it
2230
# differs from the old config value (Except for
2231
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
2234
[name]):
2235
client[name] = value
2236
except KeyError:
2237
pass
2238
2239
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
2243
if client["enabled"]:
2244
if datetime.datetime.utcnow() >= client["expires"]:
2245
if not client["last_checked_ok"]:
2246
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
2250
client["enabled"] = False
2251
elif client["last_checker_status"] != 0:
2252
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
2257
client["enabled"] = False
2258
else:
2259
client["expires"] = (datetime.datetime
2260
.utcnow()
2261
+ client["timeout"])
2262
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
2278
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
2280
clients_data[client_name] = client_settings[client_name]
2281
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
2284
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
2286
1559
client_class = functools.partial(ClientDBus, bus = bus)
1560
tcp_server.clients.update(set(
1561
client_class(name = section,
1562
config= dict(client_config.items(section)))
1563
for section in client_config.sections()))
2287
1564
if not tcp_server.clients:
2288
logger.warning("No clients defined")
1565
logger.warning(u"No clients defined")
1566
1567
if debug:
1568
# Redirect stdin so all checkers get /dev/null
1569
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1570
os.dup2(null, sys.stdin.fileno())
1571
if null > 2:
1572
os.close(null)
1573
else:
1574
# No console logging
1575
logger.removeHandler(console)
1576
# Close all input and output, do double fork, etc.
1577
daemon()
1578
1579
try:
1580
with closing(pidfile):
1581
pid = os.getpid()
1582
pidfile.write(str(pid) + "\n")
1583
del pidfile
1584
except IOError:
1585
logger.error(u"Could not write to file %r with PID %d",
1586
pidfilename, pid)
1587
except NameError:
1588
# "pidfile" was never created
1589
pass
1590
del pidfilename
1591
1592
def cleanup():
1593
"Cleanup function; run on exit"
1594
service.cleanup()
2289
1595
1596
while tcp_server.clients:
1597
client = tcp_server.clients.pop()
1598
client.disable_hook = None
1599
client.disable()
1600
1601
atexit.register(cleanup)
1602
2290
1603
if not debug:
2291
try:
2292
with pidfile:
2293
pid = os.getpid()
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2295
del pidfile
2296
except IOError:
2297
logger.error("Could not write to file %r with PID %d",
2298
pidfilename, pid)
2299
except NameError:
2300
# "pidfile" was never created
2301
pass
2302
del pidfilename
2303
1604
signal.signal(signal.SIGINT, signal.SIG_IGN)
2304
2305
1605
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2306
1606
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2307
1607
2309
1609
class MandosDBusService(dbus.service.Object):
2310
1610
"""A D-Bus proxy object"""
2311
1611
def __init__(self):
2312
dbus.service.Object.__init__(self, bus, "/")
2313
_interface = "se.recompile.Mandos"
2314
2315
@dbus.service.signal(_interface, signature="o")
2316
def ClientAdded(self, objpath):
2317
"D-Bus signal"
2318
pass
2319
2320
@dbus.service.signal(_interface, signature="ss")
2321
def ClientNotFound(self, fingerprint, address):
2322
"D-Bus signal"
2323
pass
2324
2325
@dbus.service.signal(_interface, signature="os")
1612
dbus.service.Object.__init__(self, bus, u"/")
1613
_interface = u"se.bsnet.fukt.Mandos"
1614
1615
@dbus.service.signal(_interface, signature=u"oa{sv}")
1616
def ClientAdded(self, objpath, properties):
1617
"D-Bus signal"
1618
pass
1619
1620
@dbus.service.signal(_interface, signature=u"s")
1621
def ClientNotFound(self, fingerprint):
1622
"D-Bus signal"
1623
pass
1624
1625
@dbus.service.signal(_interface, signature=u"os")
2326
1626
def ClientRemoved(self, objpath, name):
2327
1627
"D-Bus signal"
2328
1628
pass
2329
1629
2330
@dbus.service.method(_interface, out_signature="ao")
1630
@dbus.service.method(_interface, out_signature=u"ao")
2331
1631
def GetAllClients(self):
2332
1632
"D-Bus method"
2333
1633
return dbus.Array(c.dbus_object_path
2334
for c in
2335
tcp_server.clients.itervalues())
1634
for c in tcp_server.clients)
2336
1635
2337
1636
@dbus.service.method(_interface,
2338
out_signature="a{oa{sv}}")
1637
out_signature=u"a{oa{sv}}")
2339
1638
def GetAllClientsWithProperties(self):
2340
1639
"D-Bus method"
2341
1640
return dbus.Dictionary(
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
2344
signature="oa{sv}")
1641
((c.dbus_object_path, c.GetAll(u""))
1642
for c in tcp_server.clients),
1643
signature=u"oa{sv}")
2345
1644
2346
@dbus.service.method(_interface, in_signature="o")
1645
@dbus.service.method(_interface, in_signature=u"o")
2347
1646
def RemoveClient(self, object_path):
2348
1647
"D-Bus method"
2349
for c in tcp_server.clients.itervalues():
1648
for c in tcp_server.clients:
2350
1649
if c.dbus_object_path == object_path:
2351
del tcp_server.clients[c.name]
1650
tcp_server.clients.remove(c)
2352
1651
c.remove_from_connection()
2353
1652
# Don't signal anything except ClientRemoved
2354
c.disable(quiet=True)
1653
c.disable(signal=False)
2355
1654
# Emit D-Bus signal
2356
1655
self.ClientRemoved(object_path, c.name)
2357
1656
return
2358
raise KeyError(object_path)
1657
raise KeyError
2359
1658
2360
1659
del _interface
2361
1660
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
2365
2366
def cleanup():
2367
"Cleanup function; run on exit"
2368
service.cleanup()
2369
2370
multiprocessing.active_children()
2371
if not (tcp_server.clients or client_settings):
2372
return
2373
2374
# Store client before exiting. Secrets are encrypted with key
2375
# based on what config file has. If config file is
2376
# removed/edited, old secret will thus be unrecovable.
2377
clients = {}
2378
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
2380
key = client_settings[client.name]["secret"]
2381
client.encrypted_secret = pgp.encrypt(client.secret,
2382
key)
2383
client_dict = {}
2384
2385
# A list of attributes that can not be pickled
2386
# + secret.
2387
exclude = set(("bus", "changedstate", "secret",
2388
"checker"))
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
2391
exclude.add(name)
2392
2393
client_dict["encrypted_secret"] = (client
2394
.encrypted_secret)
2395
for attr in client.client_structure:
2396
if attr not in exclude:
2397
client_dict[attr] = getattr(client, attr)
2398
2399
clients[client.name] = client_dict
2400
del client_settings[client.name]["secret"]
2401
2402
try:
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
2407
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2409
.format(e))
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
2411
raise
2412
2413
# Delete all clients, and settings from config
2414
while tcp_server.clients:
2415
name, client = tcp_server.clients.popitem()
2416
if use_dbus:
2417
client.remove_from_connection()
2418
# Don't signal anything except ClientRemoved
2419
client.disable(quiet=True)
2420
if use_dbus:
2421
# Emit D-Bus signal
2422
mandos_dbus_service.ClientRemoved(client
2423
.dbus_object_path,
2424
client.name)
2425
client_settings.clear()
2426
2427
atexit.register(cleanup)
2428
2429
for client in tcp_server.clients.itervalues():
1661
mandos_dbus_service = MandosDBusService()
1662
1663
for client in tcp_server.clients:
2430
1664
if use_dbus:
2431
1665
# Emit D-Bus signal
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2433
# Need to initiate checking of clients
2434
if client.enabled:
2435
client.init_checker()
1666
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1667
client.GetAll(u""))
1668
client.enable()
2436
1669
2437
1670
tcp_server.enable()
2438
1671
tcp_server.server_activate()
2440
1673
# Find out what port we got
2441
1674
service.port = tcp_server.socket.getsockname()[1]
2442
1675
if use_ipv6:
2443
logger.info("Now listening on address %r, port %d,"
1676
logger.info(u"Now listening on address %r, port %d,"
2444
1677
" flowinfo %d, scope_id %d"
2445
1678
% tcp_server.socket.getsockname())
2446
1679
else: # IPv4
2447
logger.info("Now listening on address %r, port %d"
1680
logger.info(u"Now listening on address %r, port %d"
2448
1681
% tcp_server.socket.getsockname())
2449
1682
2450
1683
#service.interface = tcp_server.socket.getsockname()[3]
2453
1686
# From the Avahi example code
2454
1687
try:
2455
1688
service.activate()
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2458
cleanup()
1689
except dbus.exceptions.DBusException, error:
1690
logger.critical(u"DBusException: %s", error)
2459
1691
sys.exit(1)
2460
1692
# End of Avahi example code
2461
1693
2464
1696
(tcp_server.handle_request
2465
1697
(*args[2:], **kwargs) or True))
2466
1698
2467
logger.debug("Starting main loop")
1699
logger.debug(u"Starting main loop")
2468
1700
main_loop.run()
2469
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
2471
cleanup()
1701
except AvahiError, error:
1702
logger.critical(u"AvahiError: %s", error)
2472
1703
sys.exit(1)
2473
1704
except KeyboardInterrupt:
2474
1705
if debug:
2475
print("", file=sys.stderr)
2476
logger.debug("Server received KeyboardInterrupt")
2477
logger.debug("Server exiting")
2478
# Must run before the D-Bus bus name gets deregistered
2479
cleanup()
1706
print >> sys.stderr
1707
logger.debug(u"Server received KeyboardInterrupt")
1708
logger.debug(u"Server exiting")
2480
1709
2481
1710
if __name__ == '__main__':
2482
1711
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0