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- Committer: Teddy Hogeborn
- Date: 2015-05-23 12:07:07 UTC
- mto: (237.7.304 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150523120707-t5fq0brh2kxkvw8g
mandos: Some more minor changes to prepare for Python 3.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
37
43
import socket
38
import optparse
44
import argparse
39
45
import datetime
40
46
import errno
41
47
import gnutls.crypto
44
50
import gnutls.library.functions
45
51
import gnutls.library.constants
46
52
import gnutls.library.types
47
import ConfigParser as configparser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
48
57
import sys
49
58
import re
50
59
import os
55
64
import logging
56
65
import logging.handlers
57
66
import pwd
58
from contextlib import closing
67
import contextlib
59
68
import struct
60
69
import fcntl
61
70
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
75
import multiprocessing
76
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
62
81
63
82
import dbus
64
83
import dbus.service
65
import gobject
84
try:
85
import gobject
86
except ImportError:
87
from gi.repository import GObject as gobject
66
88
import avahi
67
89
from dbus.mainloop.glib import DBusGMainLoop
68
90
import ctypes
69
91
import ctypes.util
92
import xml.dom.minidom
93
import inspect
70
94
71
95
try:
72
96
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
100
except ImportError:
77
101
SO_BINDTODEVICE = None
78
102
79
80
version = "1.0.11"
81
82
logger = logging.Logger(u'mandos')
83
syslogger = (logging.handlers.SysLogHandler
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
103
if sys.version_info.major == 2:
104
str = unicode
105
106
version = "1.6.9"
107
stored_state_file = "clients.pickle"
108
109
logger = logging.getLogger()
110
syslogger = None
111
112
try:
113
if_nametoindex = ctypes.cdll.LoadLibrary(
114
ctypes.util.find_library("c")).if_nametoindex
115
except (OSError, AttributeError):
116
117
def if_nametoindex(interface):
118
"Get an interface index the hard way, i.e. using fcntl()"
119
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
120
with contextlib.closing(socket.socket()) as s:
121
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
122
struct.pack(b"16s16x", interface))
123
interface_index = struct.unpack("I", ifreq[16:20])[0]
124
return interface_index
125
126
127
def initlogger(debug, level=logging.WARNING):
128
"""init logger and add loglevel"""
129
130
global syslogger
131
syslogger = (logging.handlers.SysLogHandler(
132
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
address = "/dev/log"))
134
syslogger.setFormatter(logging.Formatter
135
('Mandos [%(process)d]: %(levelname)s:'
136
' %(message)s'))
137
logger.addHandler(syslogger)
138
139
if debug:
140
console = logging.StreamHandler()
141
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
142
' [%(process)d]:'
143
' %(levelname)s:'
144
' %(message)s'))
145
logger.addHandler(console)
146
logger.setLevel(level)
147
148
149
class PGPError(Exception):
150
"""Exception if encryption/decryption fails"""
151
pass
152
153
154
class PGPEngine(object):
155
"""A simple class for OpenPGP symmetric encryption & decryption"""
156
157
def __init__(self):
158
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
159
self.gnupgargs = ['--batch',
160
'--home', self.tempdir,
161
'--force-mdc',
162
'--quiet',
163
'--no-use-agent']
164
165
def __enter__(self):
166
return self
167
168
def __exit__(self, exc_type, exc_value, traceback):
169
self._cleanup()
170
return False
171
172
def __del__(self):
173
self._cleanup()
174
175
def _cleanup(self):
176
if self.tempdir is not None:
177
# Delete contents of tempdir
178
for root, dirs, files in os.walk(self.tempdir,
179
topdown = False):
180
for filename in files:
181
os.remove(os.path.join(root, filename))
182
for dirname in dirs:
183
os.rmdir(os.path.join(root, dirname))
184
# Remove tempdir
185
os.rmdir(self.tempdir)
186
self.tempdir = None
187
188
def password_encode(self, password):
189
# Passphrase can not be empty and can not contain newlines or
190
# NUL bytes. So we prefix it and hex encode it.
191
encoded = b"mandos" + binascii.hexlify(password)
192
if len(encoded) > 2048:
193
# GnuPG can't handle long passwords, so encode differently
194
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
195
.replace(b"\n", b"\\n")
196
.replace(b"\0", b"\\x00"))
197
return encoded
198
199
def encrypt(self, data, password):
200
passphrase = self.password_encode(password)
201
with tempfile.NamedTemporaryFile(
202
dir=self.tempdir) as passfile:
203
passfile.write(passphrase)
204
passfile.flush()
205
proc = subprocess.Popen(['gpg', '--symmetric',
206
'--passphrase-file',
207
passfile.name]
208
+ self.gnupgargs,
209
stdin = subprocess.PIPE,
210
stdout = subprocess.PIPE,
211
stderr = subprocess.PIPE)
212
ciphertext, err = proc.communicate(input = data)
213
if proc.returncode != 0:
214
raise PGPError(err)
215
return ciphertext
216
217
def decrypt(self, data, password):
218
passphrase = self.password_encode(password)
219
with tempfile.NamedTemporaryFile(
220
dir = self.tempdir) as passfile:
221
passfile.write(passphrase)
222
passfile.flush()
223
proc = subprocess.Popen(['gpg', '--decrypt',
224
'--passphrase-file',
225
passfile.name]
226
+ self.gnupgargs,
227
stdin = subprocess.PIPE,
228
stdout = subprocess.PIPE,
229
stderr = subprocess.PIPE)
230
decrypted_plaintext, err = proc.communicate(input = data)
231
if proc.returncode != 0:
232
raise PGPError(err)
233
return decrypted_plaintext
234
96
235
97
236
class AvahiError(Exception):
98
237
def __init__(self, value, *args, **kwargs):
99
238
self.value = value
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
239
return super(AvahiError, self).__init__(value, *args,
240
**kwargs)
241
103
242
104
243
class AvahiServiceError(AvahiError):
105
244
pass
106
245
246
107
247
class AvahiGroupError(AvahiError):
108
248
pass
109
249
114
254
Attributes:
115
255
interface: integer; avahi.IF_UNSPEC or an interface index.
116
256
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
119
See <http://www.dns-sd.org/ServiceTypes.html>
257
name: string; Example: 'Mandos'
258
type: string; Example: '_mandos._tcp'.
259
See <https://www.iana.org/assignments/service-names-port-numbers>
120
260
port: integer; what port to announce
121
261
TXT: list of strings; TXT record for the service
122
262
domain: string; Domain to publish on, default to .local if empty.
128
268
server: D-Bus Server
129
269
bus: dbus.SystemBus()
130
270
"""
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
271
272
def __init__(self,
273
interface = avahi.IF_UNSPEC,
274
name = None,
275
servicetype = None,
276
port = None,
277
TXT = None,
278
domain = "",
279
host = "",
280
max_renames = 32768,
281
protocol = avahi.PROTO_UNSPEC,
282
bus = None):
135
283
self.interface = interface
136
284
self.name = name
137
285
self.type = servicetype
145
293
self.group = None # our entry group
146
294
self.server = None
147
295
self.bus = bus
148
def rename(self):
296
self.entry_group_state_changed_match = None
297
298
def rename(self, remove=True):
149
299
"""Derived from the Avahi example code"""
150
300
if self.rename_count >= self.max_renames:
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
301
logger.critical("No suitable Zeroconf service name found"
302
" after %i retries, exiting.",
153
303
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
162
self.remove()
163
self.add()
304
raise AvahiServiceError("Too many renames")
305
self.name = str(
306
self.server.GetAlternativeServiceName(self.name))
164
307
self.rename_count += 1
308
logger.info("Changing Zeroconf service name to %r ...",
309
self.name)
310
if remove:
311
self.remove()
312
try:
313
self.add()
314
except dbus.exceptions.DBusException as error:
315
if (error.get_dbus_name()
316
== "org.freedesktop.Avahi.CollisionError"):
317
logger.info("Local Zeroconf service name collision.")
318
return self.rename(remove=False)
319
else:
320
logger.critical("D-Bus Exception", exc_info=error)
321
self.cleanup()
322
os._exit(1)
323
165
324
def remove(self):
166
325
"""Derived from the Avahi example code"""
326
if self.entry_group_state_changed_match is not None:
327
self.entry_group_state_changed_match.remove()
328
self.entry_group_state_changed_match = None
167
329
if self.group is not None:
168
330
self.group.Reset()
331
169
332
def add(self):
170
333
"""Derived from the Avahi example code"""
334
self.remove()
171
335
if self.group is None:
172
336
self.group = dbus.Interface(
173
337
self.bus.get_object(avahi.DBUS_NAME,
174
338
self.server.EntryGroupNew()),
175
339
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
340
self.entry_group_state_changed_match = (
341
self.group.connect_to_signal(
342
'StateChanged', self.entry_group_state_changed))
343
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
179
344
self.name, self.type)
180
345
self.group.AddService(
181
346
self.interface,
186
351
dbus.UInt16(self.port),
187
352
avahi.string_array_to_txt_array(self.TXT))
188
353
self.group.Commit()
354
189
355
def entry_group_state_changed(self, state, error):
190
356
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
357
logger.debug("Avahi entry group state change: %i", state)
192
358
193
359
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
360
logger.debug("Zeroconf service established.")
195
361
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
362
logger.info("Zeroconf service name collision.")
197
363
self.rename()
198
364
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
365
logger.critical("Avahi: Error in group state changed %s",
366
str(error))
367
raise AvahiGroupError("State changed: {!s}".format(error))
368
203
369
def cleanup(self):
204
370
"""Derived from the Avahi example code"""
205
371
if self.group is not None:
206
self.group.Free()
372
try:
373
self.group.Free()
374
except (dbus.exceptions.UnknownMethodException,
375
dbus.exceptions.DBusException):
376
pass
207
377
self.group = None
208
def server_state_changed(self, state):
378
self.remove()
379
380
def server_state_changed(self, state, error=None):
209
381
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
382
logger.debug("Avahi server state change: %i", state)
383
bad_states = {
384
avahi.SERVER_INVALID: "Zeroconf server invalid",
385
avahi.SERVER_REGISTERING: None,
386
avahi.SERVER_COLLISION: "Zeroconf server name collision",
387
avahi.SERVER_FAILURE: "Zeroconf server failure",
388
}
389
if state in bad_states:
390
if bad_states[state] is not None:
391
if error is None:
392
logger.error(bad_states[state])
393
else:
394
logger.error(bad_states[state] + ": %r", error)
395
self.cleanup()
213
396
elif state == avahi.SERVER_RUNNING:
214
397
self.add()
398
else:
399
if error is None:
400
logger.debug("Unknown state: %r", state)
401
else:
402
logger.debug("Unknown state: %r: %r", state, error)
403
215
404
def activate(self):
216
405
"""Derived from the Avahi example code"""
217
406
if self.server is None:
218
407
self.server = dbus.Interface(
219
408
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
409
avahi.DBUS_PATH_SERVER,
410
follow_name_owner_changes=True),
221
411
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
412
self.server.connect_to_signal("StateChanged",
413
self.server_state_changed)
224
414
self.server_state_changed(self.server.GetState())
225
415
226
416
417
class AvahiServiceToSyslog(AvahiService):
418
def rename(self, *args, **kwargs):
419
"""Add the new name to the syslog messages"""
420
ret = AvahiService.rename(self, *args, **kwargs)
421
syslogger.setFormatter(logging.Formatter(
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
423
.format(self.name)))
424
return ret
425
426
227
427
class Client(object):
228
428
"""A representation of a client host served by this server.
229
429
230
430
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
431
approved: bool(); 'None' if not yet approved/disapproved
432
approval_delay: datetime.timedelta(); Time to wait for approval
433
approval_duration: datetime.timedelta(); Duration of one approval
245
434
checker: subprocess.Popen(); a running checker process used
246
435
to see if the client lives.
247
436
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
437
checker_callback_tag: a gobject event source tag, or None
438
checker_command: string; External command which is run to check
439
if client lives. %() expansions are done at
253
440
runtime with vars(self) as dict, so that for
254
441
instance %(name)s can be used in the command.
442
checker_initiator_tag: a gobject event source tag, or None
443
created: datetime.datetime(); (UTC) object creation
444
client_structure: Object describing what attributes a client has
445
and is used for storing the client at exit
255
446
current_checker_command: string; current running checker_command
447
disable_initiator_tag: a gobject event source tag, or None
448
enabled: bool()
449
fingerprint: string (40 or 32 hexadecimal digits); used to
450
uniquely identify the client
451
host: string; available for use by the checker command
452
interval: datetime.timedelta(); How often to start a new checker
453
last_approval_request: datetime.datetime(); (UTC) or None
454
last_checked_ok: datetime.datetime(); (UTC) or None
455
last_checker_status: integer between 0 and 255 reflecting exit
456
status of last checker. -1 reflects crashed
457
checker, -2 means no checker completed yet.
458
last_enabled: datetime.datetime(); (UTC) or None
459
name: string; from the config file, used in log messages and
460
D-Bus identifiers
461
secret: bytestring; sent verbatim (over TLS) to client
462
timeout: datetime.timedelta(); How long from last_checked_ok
463
until this client is disabled
464
extended_timeout: extra long timeout when secret has been sent
465
runtime_expansions: Allowed attributes for runtime expansion.
466
expires: datetime.datetime(); time (UTC) when a client will be
467
disabled, or None
468
server_settings: The server_settings dict from main()
256
469
"""
257
470
471
runtime_expansions = ("approval_delay", "approval_duration",
472
"created", "enabled", "expires",
473
"fingerprint", "host", "interval",
474
"last_approval_request", "last_checked_ok",
475
"last_enabled", "name", "timeout")
476
client_defaults = {
477
"timeout": "PT5M",
478
"extended_timeout": "PT15M",
479
"interval": "PT2M",
480
"checker": "fping -q -- %%(host)s",
481
"host": "",
482
"approval_delay": "PT0S",
483
"approval_duration": "PT1S",
484
"approved_by_default": "True",
485
"enabled": "True",
486
}
487
258
488
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
268
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
276
attribute."""
489
def config_parser(config):
490
"""Construct a new dict of client settings of this form:
491
{ client_name: {setting_name: value, ...}, ...}
492
with exceptions for any special settings as defined above.
493
NOTE: Must be a pure function. Must return the same result
494
value given the same arguments.
495
"""
496
settings = {}
497
for client_name in config.sections():
498
section = dict(config.items(client_name))
499
client = settings[client_name] = {}
500
501
client["host"] = section["host"]
502
# Reformat values from string types to Python types
503
client["approved_by_default"] = config.getboolean(
504
client_name, "approved_by_default")
505
client["enabled"] = config.getboolean(client_name,
506
"enabled")
507
508
# Uppercase and remove spaces from fingerprint for later
509
# comparison purposes with return value from the
510
# fingerprint() function
511
client["fingerprint"] = (section["fingerprint"].upper()
512
.replace(" ", ""))
513
if "secret" in section:
514
client["secret"] = section["secret"].decode("base64")
515
elif "secfile" in section:
516
with open(os.path.expanduser(os.path.expandvars
517
(section["secfile"])),
518
"rb") as secfile:
519
client["secret"] = secfile.read()
520
else:
521
raise TypeError("No secret or secfile for section {}"
522
.format(section))
523
client["timeout"] = string_to_delta(section["timeout"])
524
client["extended_timeout"] = string_to_delta(
525
section["extended_timeout"])
526
client["interval"] = string_to_delta(section["interval"])
527
client["approval_delay"] = string_to_delta(
528
section["approval_delay"])
529
client["approval_duration"] = string_to_delta(
530
section["approval_duration"])
531
client["checker_command"] = section["checker"]
532
client["last_approval_request"] = None
533
client["last_checked_ok"] = None
534
client["last_checker_status"] = -2
535
536
return settings
537
538
def __init__(self, settings, name = None, server_settings=None):
277
539
self.name = name
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
281
# Uppercase and remove spaces from fingerprint for later
282
# comparison purposes with return value from the fingerprint()
283
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
540
if server_settings is None:
541
server_settings = {}
542
self.server_settings = server_settings
543
# adding all client settings
544
for setting, value in settings.items():
545
setattr(self, setting, value)
546
547
if self.enabled:
548
if not hasattr(self, "last_enabled"):
549
self.last_enabled = datetime.datetime.utcnow()
550
if not hasattr(self, "expires"):
551
self.expires = (datetime.datetime.utcnow()
552
+ self.timeout)
294
553
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
554
self.last_enabled = None
555
self.expires = None
556
557
logger.debug("Creating client %r", self.name)
558
logger.debug(" Fingerprint: %s", self.fingerprint)
559
self.created = settings.get("created",
560
datetime.datetime.utcnow())
561
562
# attributes specific for this server instance
305
563
self.checker = None
306
564
self.checker_initiator_tag = None
307
565
self.disable_initiator_tag = None
308
566
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
567
self.current_checker_command = None
311
self.last_connect = None
568
self.approved = None
569
self.approvals_pending = 0
570
self.changedstate = multiprocessing_manager.Condition(
571
multiprocessing_manager.Lock())
572
self.client_structure = [attr
573
for attr in self.__dict__.iterkeys()
574
if not attr.startswith("_")]
575
self.client_structure.append("client_structure")
576
577
for name, t in inspect.getmembers(
578
type(self), lambda obj: isinstance(obj, property)):
579
if not name.startswith("_"):
580
self.client_structure.append(name)
581
582
# Send notice to process children that client state has changed
583
def send_changedstate(self):
584
with self.changedstate:
585
self.changedstate.notify_all()
312
586
313
587
def enable(self):
314
588
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
589
if getattr(self, "enabled", False):
316
590
# Already enabled
317
591
return
592
self.expires = datetime.datetime.utcnow() + self.timeout
593
self.enabled = True
318
594
self.last_enabled = datetime.datetime.utcnow()
319
# Schedule a new checker to be started an 'interval' from now,
320
# and every interval from then on.
321
self.checker_initiator_tag = (gobject.timeout_add
322
(self.interval_milliseconds(),
323
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
326
# Schedule a disable() when 'timeout' has passed
327
self.disable_initiator_tag = (gobject.timeout_add
328
(self.timeout_milliseconds(),
329
self.disable))
330
self.enabled = True
595
self.init_checker()
596
self.send_changedstate()
331
597
332
def disable(self):
598
def disable(self, quiet=True):
333
599
"""Disable this client."""
334
600
if not getattr(self, "enabled", False):
335
601
return False
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
602
if not quiet:
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
338
605
gobject.source_remove(self.disable_initiator_tag)
339
606
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
607
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
341
609
gobject.source_remove(self.checker_initiator_tag)
342
610
self.checker_initiator_tag = None
343
611
self.stop_checker()
344
if self.disable_hook:
345
self.disable_hook(self)
346
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
347
615
# Do not run this again if called by a gobject.timeout_add
348
616
return False
349
617
350
618
def __del__(self):
351
self.disable_hook = None
352
619
self.disable()
353
620
621
def init_checker(self):
622
# Schedule a new checker to be started an 'interval' from now,
623
# and every interval from then on.
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
626
self.checker_initiator_tag = gobject.timeout_add(
627
int(self.interval.total_seconds() * 1000),
628
self.start_checker)
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
self.disable_initiator_tag = gobject.timeout_add(
633
int(self.timeout.total_seconds() * 1000), self.disable)
634
# Also start a new checker *right now*.
635
self.start_checker()
636
354
637
def checker_callback(self, pid, condition, command):
355
638
"""The checker has completed, so take appropriate actions."""
356
639
self.checker_callback_tag = None
357
640
self.checker = None
358
641
if os.WIFEXITED(condition):
359
exitstatus = os.WEXITSTATUS(condition)
360
if exitstatus == 0:
361
logger.info(u"Checker for %(name)s succeeded",
642
self.last_checker_status = os.WEXITSTATUS(condition)
643
if self.last_checker_status == 0:
644
logger.info("Checker for %(name)s succeeded",
362
645
vars(self))
363
646
self.checked_ok()
364
647
else:
365
logger.info(u"Checker for %(name)s failed",
366
vars(self))
648
logger.info("Checker for %(name)s failed", vars(self))
367
649
else:
368
logger.warning(u"Checker for %(name)s crashed?",
650
self.last_checker_status = -1
651
logger.warning("Checker for %(name)s crashed?",
369
652
vars(self))
370
653
371
654
def checked_ok(self):
372
"""Bump up the timeout for this client.
373
374
This should only be called when the client has been seen,
375
alive and well.
376
"""
655
"""Assert that the client has been seen, alive and well."""
377
656
self.last_checked_ok = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
381
self.disable))
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
662
if timeout is None:
663
timeout = self.timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = gobject.timeout_add(
669
int(timeout.total_seconds() * 1000), self.disable)
670
self.expires = datetime.datetime.utcnow() + timeout
671
672
def need_approval(self):
673
self.last_approval_request = datetime.datetime.utcnow()
382
674
383
675
def start_checker(self):
384
676
"""Start a new checker subprocess if one is not running.
386
678
If a checker already exists, leave it running and do
387
679
nothing."""
388
680
# The reason for not killing a running checker is that if we
389
# did that, then if a checker (for some reason) started
390
# running slowly and taking more than 'interval' time, the
391
# client would inevitably timeout, since no checker would get
392
# a chance to run to completion. If we instead leave running
681
# did that, and if a checker (for some reason) started running
682
# slowly and taking more than 'interval' time, then the client
683
# would inevitably timeout, since no checker would get a
684
# chance to run to completion. If we instead leave running
393
685
# checkers alone, the checker would have to take more time
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
686
# than 'timeout' for the client to be disabled, which is as it
687
# should be.
396
688
397
689
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
690
try:
399
691
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
692
except AttributeError:
693
pass
694
except OSError as error:
695
if error.errno != errno.ECHILD:
696
raise
697
else:
400
698
if pid:
401
logger.warning(u"Checker was a zombie")
699
logger.warning("Checker was a zombie")
402
700
gobject.source_remove(self.checker_callback_tag)
403
701
self.checker_callback(pid, status,
404
702
self.current_checker_command)
405
703
# Start a new checker if needed
406
704
if self.checker is None:
705
# Escape attributes for the shell
706
escaped_attrs = {
707
attr: re.escape(str(getattr(self, attr)))
708
for attr in self.runtime_expansions }
407
709
try:
408
# In case checker_command has exactly one % operator
409
command = self.checker_command % self.host
410
except TypeError:
411
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
416
for key, val in
417
vars(self).iteritems())
418
try:
419
command = self.checker_command % escaped_attrs
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
423
return True # Try again later
710
command = self.checker_command % escaped_attrs
711
except TypeError as error:
712
logger.error('Could not format string "%s"',
713
self.checker_command,
714
exc_info=error)
715
return True # Try again later
424
716
self.current_checker_command = command
425
717
try:
426
logger.info(u"Starting checker %r for %s",
427
command, self.name)
718
logger.info("Starting checker %r for %s", command,
719
self.name)
428
720
# We don't need to redirect stdout and stderr, since
429
721
# in normal mode, that is already done by daemon(),
430
722
# and in debug mode we don't want to. (Stdin is
431
723
# always replaced by /dev/null.)
724
# The exception is when not debugging but nevertheless
725
# running in the foreground; use the previously
726
# created wnull.
727
popen_args = {}
728
if (not self.server_settings["debug"]
729
and self.server_settings["foreground"]):
730
popen_args.update({"stdout": wnull,
731
"stderr": wnull })
432
732
self.checker = subprocess.Popen(command,
433
733
close_fds=True,
434
shell=True, cwd=u"/")
435
self.checker_callback_tag = (gobject.child_watch_add
436
(self.checker.pid,
437
self.checker_callback,
438
data=command))
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
734
shell=True,
735
cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = gobject.child_watch_add(
742
self.checker.pid, self.checker_callback, data=command)
743
# The checker may have completed before the gobject
744
# watch was added. Check for this.
745
try:
441
746
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
if pid:
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
447
error)
747
except OSError as error:
748
if error.errno == errno.ECHILD:
749
# This should never happen
750
logger.error("Child process vanished",
751
exc_info=error)
752
return True
753
raise
754
if pid:
755
gobject.source_remove(self.checker_callback_tag)
756
self.checker_callback(pid, status, command)
448
757
# Re-run this periodically if run by gobject.timeout_add
449
758
return True
450
759
453
762
if self.checker_callback_tag:
454
763
gobject.source_remove(self.checker_callback_tag)
455
764
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
765
if getattr(self, "checker", None) is None:
457
766
return
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
767
logger.debug("Stopping checker for %(name)s", vars(self))
459
768
try:
460
os.kill(self.checker.pid, signal.SIGTERM)
461
#os.sleep(0.5)
769
self.checker.terminate()
770
#time.sleep(0.5)
462
771
#if self.checker.poll() is None:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
772
# self.checker.kill()
773
except OSError as error:
465
774
if error.errno != errno.ESRCH: # No such process
466
775
raise
467
776
self.checker = None
468
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
472
return False
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
476
else:
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
777
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
799
def decorator(func):
800
func._dbus_is_property = True
801
func._dbus_interface = dbus_interface
802
func._dbus_signature = signature
803
func._dbus_access = access
804
func._dbus_name = func.__name__
805
if func._dbus_name.endswith("_dbus_property"):
806
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
"""
846
847
def decorator(func):
848
func._dbus_annotations = annotations
849
return func
850
851
return decorator
852
853
854
class DBusPropertyException(dbus.exceptions.DBusException):
855
"""A base class for D-Bus property-related exceptions
856
"""
857
pass
858
859
860
class DBusPropertyAccessException(DBusPropertyException):
861
"""A property's access permissions disallows an operation.
862
"""
863
pass
864
865
866
class DBusPropertyNotFound(DBusPropertyException):
867
"""An attempt was made to access a non-existing property.
868
"""
869
pass
870
871
872
class DBusObjectWithProperties(dbus.service.Object):
873
"""A D-Bus object with properties.
874
875
Classes inheriting from this can use the dbus_service_property
876
decorator to expose methods as D-Bus properties. It exposes the
877
standard Get(), Set(), and GetAll() methods on the D-Bus.
878
"""
879
880
@staticmethod
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
883
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
886
"""
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
False)
889
890
def _get_all_dbus_things(self, thing):
891
"""Returns a generator of (name, attribute) pairs
892
"""
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
895
for cls in self.__class__.__mro__
896
for name, athing in
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
899
def _get_dbus_property(self, interface_name, property_name):
900
"""Returns a bound method if one exists which is a D-Bus
901
property with the specified name and interface.
902
"""
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
913
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
948
out_signature="a{sv}")
949
def GetAll(self, interface_name):
950
"""Standard D-Bus property GetAll() method, see D-Bus
951
standard.
952
953
Note: Will not include properties with access="write".
954
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
957
if (interface_name
958
and interface_name != prop._dbus_interface):
959
# Interface non-empty but did not match
960
continue
961
# Ignore write-only properties
962
if prop._dbus_access == "write":
963
continue
964
value = prop()
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
967
continue
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
970
return dbus.Dictionary(properties, signature="sv")
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
out_signature="s",
982
path_keyword='object_path',
983
connection_keyword='connection')
984
def Introspect(self, object_path, connection):
985
"""Overloading of standard D-Bus method.
986
987
Inserts property tags and interface annotation tags.
988
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
991
try:
992
document = xml.dom.minidom.parseString(xmlstring)
993
994
def make_tag(document, name, prop):
995
e = document.createElement("property")
996
e.setAttribute("name", name)
997
e.setAttribute("type", prop._dbus_signature)
998
e.setAttribute("access", prop._dbus_access)
999
return e
1000
1001
for if_tag in document.getElementsByTagName("interface"):
1002
# Add property tags
1003
for tag in (make_tag(document, name, prop)
1004
for name, prop
1005
in self._get_all_dbus_things("property")
1006
if prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1012
annots = dict()
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1022
"annotation")
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1033
)).items():
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1038
# Add the names to the return values for the
1039
# "org.freedesktop.DBus.Properties" methods
1040
if (if_tag.getAttribute("name")
1041
== "org.freedesktop.DBus.Properties"):
1042
for cn in if_tag.getElementsByTagName("method"):
1043
if cn.getAttribute("name") == "Get":
1044
for arg in cn.getElementsByTagName("arg"):
1045
if (arg.getAttribute("direction")
1046
== "out"):
1047
arg.setAttribute("name", "value")
1048
elif cn.getAttribute("name") == "GetAll":
1049
for arg in cn.getElementsByTagName("arg"):
1050
if (arg.getAttribute("direction")
1051
== "out"):
1052
arg.setAttribute("name", "props")
1053
xmlstring = document.toxml("utf-8")
1054
document.unlink()
1055
except (AttributeError, xml.dom.DOMException,
1056
xml.parsers.expat.ExpatError) as error:
1057
logger.error("Failed to override Introspection method",
1058
exc_info=error)
1059
return xmlstring
1060
1061
1062
def datetime_to_dbus(dt, variant_level=0):
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1064
if dt is None:
1065
return dbus.String("", variant_level = variant_level)
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1067
1068
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1073
Usage:
1074
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1080
pass
1081
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1087
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
1091
"""
1092
1093
def wrapper(cls):
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1096
attr = {}
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
for attrname, attribute in inspect.getmembers(cls):
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
1101
# with the wrong interface name
1102
if (not hasattr(attribute, "_dbus_interface")
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
1105
continue
1106
# Create an alternate D-Bus interface name based on
1107
# the current name
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
1111
# Is this a D-Bus signal?
1112
if getattr(attribute, "_dbus_is_signal", False):
1113
# Extract the original non-method undecorated
1114
# function by black magic
1115
nonmethod_func = (dict(
1116
zip(attribute.func_code.co_freevars,
1117
attribute.__closure__))
1118
["func"].cell_contents)
1119
# Create a new, but exactly alike, function
1120
# object, and decorate it to be a new D-Bus signal
1121
# with the alternate D-Bus interface name
1122
new_function = (dbus.service.signal(
1123
alt_interface, attribute._dbus_signature)
1124
(types.FunctionType(
1125
nonmethod_func.func_code,
1126
nonmethod_func.func_globals,
1127
nonmethod_func.func_name,
1128
nonmethod_func.func_defaults,
1129
nonmethod_func.func_closure)))
1130
# Copy annotations, if any
1131
try:
1132
new_function._dbus_annotations = dict(
1133
attribute._dbus_annotations)
1134
except AttributeError:
1135
pass
1136
# Define a creator of a function to call both the
1137
# original and alternate functions, so both the
1138
# original and alternate signals gets sent when
1139
# the function is called
1140
def fixscope(func1, func2):
1141
"""This function is a scope container to pass
1142
func1 and func2 to the "call_both" function
1143
outside of its arguments"""
1144
1145
def call_both(*args, **kwargs):
1146
"""This function will emit two D-Bus
1147
signals by calling func1 and func2"""
1148
func1(*args, **kwargs)
1149
func2(*args, **kwargs)
1150
1151
return call_both
1152
# Create the "call_both" function and add it to
1153
# the class
1154
attr[attrname] = fixscope(attribute, new_function)
1155
# Is this a D-Bus method?
1156
elif getattr(attribute, "_dbus_is_method", False):
1157
# Create a new, but exactly alike, function
1158
# object. Decorate it to be a new D-Bus method
1159
# with the alternate D-Bus interface name. Add it
1160
# to the class.
1161
attr[attrname] = (
1162
dbus.service.method(
1163
alt_interface,
1164
attribute._dbus_in_signature,
1165
attribute._dbus_out_signature)
1166
(types.FunctionType(attribute.func_code,
1167
attribute.func_globals,
1168
attribute.func_name,
1169
attribute.func_defaults,
1170
attribute.func_closure)))
1171
# Copy annotations, if any
1172
try:
1173
attr[attrname]._dbus_annotations = dict(
1174
attribute._dbus_annotations)
1175
except AttributeError:
1176
pass
1177
# Is this a D-Bus property?
1178
elif getattr(attribute, "_dbus_is_property", False):
1179
# Create a new, but exactly alike, function
1180
# object, and decorate it to be a new D-Bus
1181
# property with the alternate D-Bus interface
1182
# name. Add it to the class.
1183
attr[attrname] = (dbus_service_property(
1184
alt_interface, attribute._dbus_signature,
1185
attribute._dbus_access,
1186
attribute._dbus_get_args_options
1187
["byte_arrays"])
1188
(types.FunctionType(
1189
attribute.func_code,
1190
attribute.func_globals,
1191
attribute.func_name,
1192
attribute.func_defaults,
1193
attribute.func_closure)))
1194
# Copy annotations, if any
1195
try:
1196
attr[attrname]._dbus_annotations = dict(
1197
attribute._dbus_annotations)
1198
except AttributeError:
1199
pass
1200
# Is this a D-Bus interface?
1201
elif getattr(attribute, "_dbus_is_interface", False):
1202
# Create a new, but exactly alike, function
1203
# object. Decorate it to be a new D-Bus interface
1204
# with the alternate D-Bus interface name. Add it
1205
# to the class.
1206
attr[attrname] = (
1207
dbus_interface_annotations(alt_interface)
1208
(types.FunctionType(attribute.func_code,
1209
attribute.func_globals,
1210
attribute.func_name,
1211
attribute.func_defaults,
1212
attribute.func_closure)))
1213
if deprecate:
1214
# Deprecate all alternate interfaces
1215
iname="_AlternateDBusNames_interface_annotation{}"
1216
for interface_name in interface_names:
1217
1218
@dbus_interface_annotations(interface_name)
1219
def func(self):
1220
return { "org.freedesktop.DBus.Deprecated":
1221
"true" }
1222
# Find an unused name
1223
for aname in (iname.format(i)
1224
for i in itertools.count()):
1225
if aname not in attr:
1226
attr[aname] = func
1227
break
1228
if interface_names:
1229
# Replace the class with a new subclass of it with
1230
# methods, signals, etc. as created above.
1231
cls = type(b"{}Alternate".format(cls.__name__),
1232
(cls, ), attr)
1233
return cls
1234
1235
return wrapper
1236
1237
1238
@alternate_dbus_interfaces({"se.recompile.Mandos":
1239
"se.bsnet.fukt.Mandos"})
1240
class ClientDBus(Client, DBusObjectWithProperties):
481
1241
"""A Client class using D-Bus
482
1242
483
1243
Attributes:
484
1244
dbus_object_path: dbus.ObjectPath
485
1245
bus: dbus.SystemBus()
486
1246
"""
1247
1248
runtime_expansions = (Client.runtime_expansions
1249
+ ("dbus_object_path", ))
1250
1251
_interface = "se.recompile.Mandos.Client"
1252
487
1253
# dbus.service.Object doesn't use super(), so we can't either.
488
1254
489
1255
def __init__(self, bus = None, *args, **kwargs):
491
1257
Client.__init__(self, *args, **kwargs)
492
1258
# Only now, when this client is initialized, can it show up on
493
1259
# the D-Bus
494
self.dbus_object_path = (dbus.ObjectPath
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
1260
client_object_name = str(self.name).translate(
1261
{ord("."): ord("_"),
1262
ord("-"): ord("_")})
1263
self.dbus_object_path = dbus.ObjectPath(
1264
"/clients/" + client_object_name)
1265
DBusObjectWithProperties.__init__(self, self.bus,
1266
self.dbus_object_path)
1267
1268
def notifychangeproperty(transform_func, dbus_name,
1269
type_func=lambda x: x,
1270
variant_level=1,
1271
invalidate_only=False,
1272
_interface=_interface):
1273
""" Modify a variable so that it's a property which announces
1274
its changes to DBus.
1275
1276
transform_fun: Function that takes a value and a variant_level
1277
and transforms it to a D-Bus type.
1278
dbus_name: D-Bus name of the variable
1279
type_func: Function that transform the value before sending it
1280
to the D-Bus. Default: no transform
1281
variant_level: D-Bus variant level. Default: 1
1282
"""
1283
attrname = "_{}".format(dbus_name)
1284
1285
def setter(self, value):
1286
if hasattr(self, "dbus_object_path"):
1287
if (not hasattr(self, attrname) or
1288
type_func(getattr(self, attrname, None))
1289
!= type_func(value)):
1290
if invalidate_only:
1291
self.PropertiesChanged(
1292
_interface, dbus.Dictionary(),
1293
dbus.Array((dbus_name, )))
1294
else:
1295
dbus_value = transform_func(
1296
type_func(value),
1297
variant_level = variant_level)
1298
self.PropertyChanged(dbus.String(dbus_name),
1299
dbus_value)
1300
self.PropertiesChanged(
1301
_interface,
1302
dbus.Dictionary({ dbus.String(dbus_name):
1303
dbus_value }),
1304
dbus.Array())
1305
setattr(self, attrname, value)
1306
1307
return property(lambda self: getattr(self, attrname), setter)
1308
1309
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1310
approvals_pending = notifychangeproperty(dbus.Boolean,
1311
"ApprovalPending",
1312
type_func = bool)
1313
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1314
last_enabled = notifychangeproperty(datetime_to_dbus,
1315
"LastEnabled")
1316
checker = notifychangeproperty(
1317
dbus.Boolean, "CheckerRunning",
1318
type_func = lambda checker: checker is not None)
1319
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1320
"LastCheckedOK")
1321
last_checker_status = notifychangeproperty(dbus.Int16,
1322
"LastCheckerStatus")
1323
last_approval_request = notifychangeproperty(
1324
datetime_to_dbus, "LastApprovalRequest")
1325
approved_by_default = notifychangeproperty(dbus.Boolean,
1326
"ApprovedByDefault")
1327
approval_delay = notifychangeproperty(
1328
dbus.UInt64, "ApprovalDelay",
1329
type_func = lambda td: td.total_seconds() * 1000)
1330
approval_duration = notifychangeproperty(
1331
dbus.UInt64, "ApprovalDuration",
1332
type_func = lambda td: td.total_seconds() * 1000)
1333
host = notifychangeproperty(dbus.String, "Host")
1334
timeout = notifychangeproperty(
1335
dbus.UInt64, "Timeout",
1336
type_func = lambda td: td.total_seconds() * 1000)
1337
extended_timeout = notifychangeproperty(
1338
dbus.UInt64, "ExtendedTimeout",
1339
type_func = lambda td: td.total_seconds() * 1000)
1340
interval = notifychangeproperty(
1341
dbus.UInt64, "Interval",
1342
type_func = lambda td: td.total_seconds() * 1000)
1343
checker_command = notifychangeproperty(dbus.String, "Checker")
1344
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1345
invalidate_only=True)
1346
1347
del notifychangeproperty
527
1348
528
1349
def __del__(self, *args, **kwargs):
529
1350
try:
530
1351
self.remove_from_connection()
531
1352
except LookupError:
532
1353
pass
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1354
if hasattr(DBusObjectWithProperties, "__del__"):
1355
DBusObjectWithProperties.__del__(self, *args, **kwargs)
535
1356
Client.__del__(self, *args, **kwargs)
536
1357
537
1358
def checker_callback(self, pid, condition, command,
538
1359
*args, **kwargs):
539
1360
self.checker_callback_tag = None
540
1361
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
1362
if os.WIFEXITED(condition):
545
1363
exitstatus = os.WEXITSTATUS(condition)
546
1364
# Emit D-Bus signal
556
1374
return Client.checker_callback(self, pid, condition, command,
557
1375
*args, **kwargs)
558
1376
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
568
1377
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
572
else:
573
old_checker_pid = None
1378
old_checker_pid = getattr(self.checker, "pid", None)
574
1379
r = Client.start_checker(self, *args, **kwargs)
575
1380
# Only if new checker process was started
576
1381
if (self.checker is not None
577
1382
and old_checker_pid != self.checker.pid):
578
1383
# Emit D-Bus signal
579
1384
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
593
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
596
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
1385
return r
1386
1387
def _reset_approved(self):
1388
self.approved = None
1389
return False
1390
1391
def approve(self, value=True):
1392
self.approved = value
1393
gobject.timeout_add(int(self.approval_duration.total_seconds()
1394
* 1000), self._reset_approved)
1395
self.send_changedstate()
1396
1397
## D-Bus methods, signals & properties
1398
1399
## Interfaces
1400
1401
## Signals
601
1402
602
1403
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
1404
@dbus.service.signal(_interface, signature="nxs")
604
1405
def CheckerCompleted(self, exitcode, waitstatus, command):
605
1406
"D-Bus signal"
606
1407
pass
607
1408
608
1409
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
1410
@dbus.service.signal(_interface, signature="s")
610
1411
def CheckerStarted(self, command):
611
1412
"D-Bus signal"
612
1413
pass
613
1414
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
617
"D-Bus method"
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
642
variant_level=1),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
645
variant_level=1),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
648
variant_level=1),
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
651
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
656
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
661
662
1415
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
1416
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1417
@dbus.service.signal(_interface, signature="sv")
664
1418
def PropertyChanged(self, property, value):
665
1419
"D-Bus signal"
666
1420
pass
667
1421
668
# ReceivedSecret - signal
1422
# GotSecret - signal
669
1423
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
671
"D-Bus signal"
1424
def GotSecret(self):
1425
"""D-Bus signal
1426
Is sent after a successful transfer of secret from the Mandos
1427
server to mandos-client
1428
"""
672
1429
pass
673
1430
674
1431
# Rejected - signal
675
@dbus.service.signal(_interface)
676
def Rejected(self):
1432
@dbus.service.signal(_interface, signature="s")
1433
def Rejected(self, reason):
677
1434
"D-Bus signal"
678
1435
pass
679
1436
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
685
# Emit D-Bus signal
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
688
variant_level=1))
689
690
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
694
self.host = host
695
# Emit D-Bus signal
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
698
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
# Emit D-Bus signal
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
706
variant_level=1)))
707
708
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
710
byte_arrays=True)
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
714
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
# Emit D-Bus signal
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
722
variant_level=1)))
1437
# NeedApproval - signal
1438
@dbus.service.signal(_interface, signature="tb")
1439
def NeedApproval(self, timeout, default):
1440
"D-Bus signal"
1441
return self.need_approval()
1442
1443
## Methods
1444
1445
# Approve - method
1446
@dbus.service.method(_interface, in_signature="b")
1447
def Approve(self, value):
1448
self.approve(value)
1449
1450
# CheckedOK - method
1451
@dbus.service.method(_interface)
1452
def CheckedOK(self):
1453
self.checked_ok()
723
1454
724
1455
# Enable - method
725
1456
@dbus.service.method(_interface)
744
1475
def StopChecker(self):
745
1476
self.stop_checker()
746
1477
1478
## Properties
1479
1480
# ApprovalPending - property
1481
@dbus_service_property(_interface, signature="b", access="read")
1482
def ApprovalPending_dbus_property(self):
1483
return dbus.Boolean(bool(self.approvals_pending))
1484
1485
# ApprovedByDefault - property
1486
@dbus_service_property(_interface,
1487
signature="b",
1488
access="readwrite")
1489
def ApprovedByDefault_dbus_property(self, value=None):
1490
if value is None: # get
1491
return dbus.Boolean(self.approved_by_default)
1492
self.approved_by_default = bool(value)
1493
1494
# ApprovalDelay - property
1495
@dbus_service_property(_interface,
1496
signature="t",
1497
access="readwrite")
1498
def ApprovalDelay_dbus_property(self, value=None):
1499
if value is None: # get
1500
return dbus.UInt64(self.approval_delay.total_seconds()
1501
* 1000)
1502
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1503
1504
# ApprovalDuration - property
1505
@dbus_service_property(_interface,
1506
signature="t",
1507
access="readwrite")
1508
def ApprovalDuration_dbus_property(self, value=None):
1509
if value is None: # get
1510
return dbus.UInt64(self.approval_duration.total_seconds()
1511
* 1000)
1512
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1513
1514
# Name - property
1515
@dbus_service_property(_interface, signature="s", access="read")
1516
def Name_dbus_property(self):
1517
return dbus.String(self.name)
1518
1519
# Fingerprint - property
1520
@dbus_service_property(_interface, signature="s", access="read")
1521
def Fingerprint_dbus_property(self):
1522
return dbus.String(self.fingerprint)
1523
1524
# Host - property
1525
@dbus_service_property(_interface,
1526
signature="s",
1527
access="readwrite")
1528
def Host_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.String(self.host)
1531
self.host = str(value)
1532
1533
# Created - property
1534
@dbus_service_property(_interface, signature="s", access="read")
1535
def Created_dbus_property(self):
1536
return datetime_to_dbus(self.created)
1537
1538
# LastEnabled - property
1539
@dbus_service_property(_interface, signature="s", access="read")
1540
def LastEnabled_dbus_property(self):
1541
return datetime_to_dbus(self.last_enabled)
1542
1543
# Enabled - property
1544
@dbus_service_property(_interface,
1545
signature="b",
1546
access="readwrite")
1547
def Enabled_dbus_property(self, value=None):
1548
if value is None: # get
1549
return dbus.Boolean(self.enabled)
1550
if value:
1551
self.enable()
1552
else:
1553
self.disable()
1554
1555
# LastCheckedOK - property
1556
@dbus_service_property(_interface,
1557
signature="s",
1558
access="readwrite")
1559
def LastCheckedOK_dbus_property(self, value=None):
1560
if value is not None:
1561
self.checked_ok()
1562
return
1563
return datetime_to_dbus(self.last_checked_ok)
1564
1565
# LastCheckerStatus - property
1566
@dbus_service_property(_interface, signature="n", access="read")
1567
def LastCheckerStatus_dbus_property(self):
1568
return dbus.Int16(self.last_checker_status)
1569
1570
# Expires - property
1571
@dbus_service_property(_interface, signature="s", access="read")
1572
def Expires_dbus_property(self):
1573
return datetime_to_dbus(self.expires)
1574
1575
# LastApprovalRequest - property
1576
@dbus_service_property(_interface, signature="s", access="read")
1577
def LastApprovalRequest_dbus_property(self):
1578
return datetime_to_dbus(self.last_approval_request)
1579
1580
# Timeout - property
1581
@dbus_service_property(_interface,
1582
signature="t",
1583
access="readwrite")
1584
def Timeout_dbus_property(self, value=None):
1585
if value is None: # get
1586
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1587
old_timeout = self.timeout
1588
self.timeout = datetime.timedelta(0, 0, 0, value)
1589
# Reschedule disabling
1590
if self.enabled:
1591
now = datetime.datetime.utcnow()
1592
self.expires += self.timeout - old_timeout
1593
if self.expires <= now:
1594
# The timeout has passed
1595
self.disable()
1596
else:
1597
if (getattr(self, "disable_initiator_tag", None)
1598
is None):
1599
return
1600
gobject.source_remove(self.disable_initiator_tag)
1601
self.disable_initiator_tag = gobject.timeout_add(
1602
int((self.expires - now).total_seconds() * 1000),
1603
self.disable)
1604
1605
# ExtendedTimeout - property
1606
@dbus_service_property(_interface,
1607
signature="t",
1608
access="readwrite")
1609
def ExtendedTimeout_dbus_property(self, value=None):
1610
if value is None: # get
1611
return dbus.UInt64(self.extended_timeout.total_seconds()
1612
* 1000)
1613
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1614
1615
# Interval - property
1616
@dbus_service_property(_interface,
1617
signature="t",
1618
access="readwrite")
1619
def Interval_dbus_property(self, value=None):
1620
if value is None: # get
1621
return dbus.UInt64(self.interval.total_seconds() * 1000)
1622
self.interval = datetime.timedelta(0, 0, 0, value)
1623
if getattr(self, "checker_initiator_tag", None) is None:
1624
return
1625
if self.enabled:
1626
# Reschedule checker run
1627
gobject.source_remove(self.checker_initiator_tag)
1628
self.checker_initiator_tag = gobject.timeout_add(
1629
value, self.start_checker)
1630
self.start_checker() # Start one now, too
1631
1632
# Checker - property
1633
@dbus_service_property(_interface,
1634
signature="s",
1635
access="readwrite")
1636
def Checker_dbus_property(self, value=None):
1637
if value is None: # get
1638
return dbus.String(self.checker_command)
1639
self.checker_command = str(value)
1640
1641
# CheckerRunning - property
1642
@dbus_service_property(_interface,
1643
signature="b",
1644
access="readwrite")
1645
def CheckerRunning_dbus_property(self, value=None):
1646
if value is None: # get
1647
return dbus.Boolean(self.checker is not None)
1648
if value:
1649
self.start_checker()
1650
else:
1651
self.stop_checker()
1652
1653
# ObjectPath - property
1654
@dbus_service_property(_interface, signature="o", access="read")
1655
def ObjectPath_dbus_property(self):
1656
return self.dbus_object_path # is already a dbus.ObjectPath
1657
1658
# Secret = property
1659
@dbus_service_property(_interface,
1660
signature="ay",
1661
access="write",
1662
byte_arrays=True)
1663
def Secret_dbus_property(self, value):
1664
self.secret = bytes(value)
1665
747
1666
del _interface
748
1667
749
1668
1669
class ProxyClient(object):
1670
def __init__(self, child_pipe, fpr, address):
1671
self._pipe = child_pipe
1672
self._pipe.send(('init', fpr, address))
1673
if not self._pipe.recv():
1674
raise KeyError()
1675
1676
def __getattribute__(self, name):
1677
if name == '_pipe':
1678
return super(ProxyClient, self).__getattribute__(name)
1679
self._pipe.send(('getattr', name))
1680
data = self._pipe.recv()
1681
if data[0] == 'data':
1682
return data[1]
1683
if data[0] == 'function':
1684
1685
def func(*args, **kwargs):
1686
self._pipe.send(('funcall', name, args, kwargs))
1687
return self._pipe.recv()[1]
1688
1689
return func
1690
1691
def __setattr__(self, name, value):
1692
if name == '_pipe':
1693
return super(ProxyClient, self).__setattr__(name, value)
1694
self._pipe.send(('setattr', name, value))
1695
1696
750
1697
class ClientHandler(socketserver.BaseRequestHandler, object):
751
1698
"""A class to handle client connections.
752
1699
754
1701
Note: This will run in its own forked process."""
755
1702
756
1703
def handle(self):
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
session = (gnutls.connection
763
.ClientSession(self.request,
764
gnutls.connection
765
.X509Credentials()))
1704
with contextlib.closing(self.server.child_pipe) as child_pipe:
1705
logger.info("TCP connection from: %s",
1706
str(self.client_address))
1707
logger.debug("Pipe FD: %d",
1708
self.server.child_pipe.fileno())
766
1709
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
1710
session = gnutls.connection.ClientSession(
1711
self.request, gnutls.connection .X509Credentials())
775
1712
776
1713
# Note: gnutls.connection.X509Credentials is really a
777
1714
# generic GnuTLS certificate credentials object so long as
778
1715
# no X.509 keys are added to it. Therefore, we can use it
779
1716
# here despite using OpenPGP certificates.
780
1717
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
1718
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1719
# "+AES-256-CBC", "+SHA1",
1720
# "+COMP-NULL", "+CTYPE-OPENPGP",
1721
# "+DHE-DSS"))
785
1722
# Use a fallback default, since this MUST be set.
786
1723
priority = self.server.gnutls_priority
787
1724
if priority is None:
788
priority = u"NORMAL"
789
(gnutls.library.functions
790
.gnutls_priority_set_direct(session._c_object,
791
priority, None))
792
1725
priority = "NORMAL"
1726
gnutls.library.functions.gnutls_priority_set_direct(
1727
session._c_object, priority, None)
1728
1729
# Start communication using the Mandos protocol
1730
# Get protocol number
1731
line = self.request.makefile().readline()
1732
logger.debug("Protocol version: %r", line)
1733
try:
1734
if int(line.strip().split()[0]) > 1:
1735
raise RuntimeError(line)
1736
except (ValueError, IndexError, RuntimeError) as error:
1737
logger.error("Unknown protocol version: %s", error)
1738
return
1739
1740
# Start GnuTLS connection
793
1741
try:
794
1742
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("Handshake failed: %s", error)
797
1745
# Do not run session.bye() here: the session is not
798
1746
# established. Just abandon the request.
799
1747
return
800
logger.debug(u"Handshake succeeded")
1748
logger.debug("Handshake succeeded")
1749
1750
approval_required = False
801
1751
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
1752
try:
1753
fpr = self.fingerprint(
1754
self.peer_certificate(session))
1755
except (TypeError,
1756
gnutls.errors.GNUTLSError) as error:
1757
logger.warning("Bad certificate: %s", error)
1758
return
1759
logger.debug("Fingerprint: %s", fpr)
1760
1761
try:
1762
client = ProxyClient(child_pipe, fpr,
1763
self.client_address)
1764
except KeyError:
1765
return
1766
1767
if client.approval_delay:
1768
delay = client.approval_delay
1769
client.approvals_pending += 1
1770
approval_required = True
1771
1772
while True:
1773
if not client.enabled:
1774
logger.info("Client %s is disabled",
1775
client.name)
1776
if self.server.use_dbus:
1777
# Emit D-Bus signal
1778
client.Rejected("Disabled")
1779
return
1780
1781
if client.approved or not client.approval_delay:
1782
#We are approved or approval is disabled
1783
break
1784
elif client.approved is None:
1785
logger.info("Client %s needs approval",
1786
client.name)
1787
if self.server.use_dbus:
1788
# Emit D-Bus signal
1789
client.NeedApproval(
1790
client.approval_delay.total_seconds()
1791
* 1000, client.approved_by_default)
1792
else:
1793
logger.warning("Client %s was not approved",
1794
client.name)
1795
if self.server.use_dbus:
1796
# Emit D-Bus signal
1797
client.Rejected("Denied")
1798
return
1799
1800
#wait until timeout or approved
1801
time = datetime.datetime.now()
1802
client.changedstate.acquire()
1803
client.changedstate.wait(delay.total_seconds())
1804
client.changedstate.release()
1805
time2 = datetime.datetime.now()
1806
if (time2 - time) >= delay:
1807
if not client.approved_by_default:
1808
logger.warning("Client %s timed out while"
1809
" waiting for approval",
1810
client.name)
1811
if self.server.use_dbus:
1812
# Emit D-Bus signal
1813
client.Rejected("Approval timed out")
1814
return
1815
else:
1816
break
1817
else:
1818
delay -= time2 - time
1819
1820
sent_size = 0
1821
while sent_size < len(client.secret):
1822
try:
1823
sent = session.send(client.secret[sent_size:])
1824
except gnutls.errors.GNUTLSError as error:
1825
logger.warning("gnutls send failed",
1826
exc_info=error)
1827
return
1828
logger.debug("Sent: %d, remaining: %d", sent,
1829
len(client.secret) - (sent_size
1830
+ sent))
1831
sent_size += sent
1832
1833
logger.info("Sending secret to %s", client.name)
1834
# bump the timeout using extended_timeout
1835
client.bump_timeout(client.extended_timeout)
1836
if self.server.use_dbus:
1837
# Emit D-Bus signal
1838
client.GotSecret()
808
1839
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
816
session.bye()
817
return
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
823
session.bye()
824
return
825
ipc.write(u"SENDING %s\n" % client.name)
826
sent_size = 0
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
832
sent_size += sent
833
session.bye()
1840
finally:
1841
if approval_required:
1842
client.approvals_pending -= 1
1843
try:
1844
session.bye()
1845
except gnutls.errors.GNUTLSError as error:
1846
logger.warning("GnuTLS bye failed",
1847
exc_info=error)
834
1848
835
1849
@staticmethod
836
1850
def peer_certificate(session):
837
1851
"Return the peer's OpenPGP certificate as a bytestring"
838
1852
# If not an OpenPGP certificate...
839
if (gnutls.library.functions
840
.gnutls_certificate_type_get(session._c_object)
1853
if (gnutls.library.functions.gnutls_certificate_type_get(
1854
session._c_object)
841
1855
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
842
1856
# ...do the normal thing
843
1857
return session.peer_certificate
846
1860
.gnutls_certificate_get_peers
847
1861
(session._c_object, ctypes.byref(list_size)))
848
1862
if not bool(cert_list) and list_size.value != 0:
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
850
u" certificate")
1863
raise gnutls.errors.GNUTLSError("error getting peer"
1864
" certificate")
851
1865
if list_size.value == 0:
852
1866
return None
853
1867
cert = cert_list[0]
857
1871
def fingerprint(openpgp):
858
1872
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
859
1873
# New GnuTLS "datum" with the OpenPGP public key
860
datum = (gnutls.library.types
861
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
862
ctypes.POINTER
863
(ctypes.c_ubyte)),
864
ctypes.c_uint(len(openpgp))))
1874
datum = gnutls.library.types.gnutls_datum_t(
1875
ctypes.cast(ctypes.c_char_p(openpgp),
1876
ctypes.POINTER(ctypes.c_ubyte)),
1877
ctypes.c_uint(len(openpgp)))
865
1878
# New empty GnuTLS certificate
866
1879
crt = gnutls.library.types.gnutls_openpgp_crt_t()
867
(gnutls.library.functions
868
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1880
gnutls.library.functions.gnutls_openpgp_crt_init(
1881
ctypes.byref(crt))
869
1882
# Import the OpenPGP public key into the certificate
870
(gnutls.library.functions
871
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
872
gnutls.library.constants
873
.GNUTLS_OPENPGP_FMT_RAW))
1883
gnutls.library.functions.gnutls_openpgp_crt_import(
1884
crt, ctypes.byref(datum),
1885
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
874
1886
# Verify the self signature in the key
875
1887
crtverify = ctypes.c_uint()
876
(gnutls.library.functions
877
.gnutls_openpgp_crt_verify_self(crt, 0,
878
ctypes.byref(crtverify)))
1888
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1889
crt, 0, ctypes.byref(crtverify))
879
1890
if crtverify.value != 0:
880
1891
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
881
raise (gnutls.errors.CertificateSecurityError
882
(u"Verify failed"))
1892
raise gnutls.errors.CertificateSecurityError(
1893
"Verify failed")
883
1894
# New buffer for the fingerprint
884
1895
buf = ctypes.create_string_buffer(20)
885
1896
buf_len = ctypes.c_size_t()
886
1897
# Get the fingerprint from the certificate into the buffer
887
(gnutls.library.functions
888
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
889
ctypes.byref(buf_len)))
1898
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1899
crt, ctypes.byref(buf), ctypes.byref(buf_len))
890
1900
# Deinit the certificate
891
1901
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
892
1902
# Convert the buffer to a Python bytestring
893
1903
fpr = ctypes.string_at(buf, buf_len.value)
894
1904
# Convert the bytestring to hexadecimal notation
895
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1905
hex_fpr = binascii.hexlify(fpr).upper()
896
1906
return hex_fpr
897
1907
898
1908
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
900
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1909
class MultiprocessingMixIn(object):
1910
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1911
1912
def sub_process_main(self, request, address):
1913
try:
1914
self.finish_request(request, address)
1915
except Exception:
1916
self.handle_error(request, address)
1917
self.close_request(request)
1918
1919
def process_request(self, request, address):
1920
"""Start a new process to process the request."""
1921
proc = multiprocessing.Process(target = self.sub_process_main,
1922
args = (request, address))
1923
proc.start()
1924
return proc
1925
1926
1927
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1928
""" adds a pipe to the MixIn """
1929
901
1930
def process_request(self, request, client_address):
902
1931
"""Overrides and wraps the original process_request().
903
1932
904
This function creates a new pipe in self.pipe
1933
This function creates a new pipe in self.pipe
905
1934
"""
906
self.pipe = os.pipe()
907
super(ForkingMixInWithPipe,
908
self).process_request(request, client_address)
909
os.close(self.pipe[1]) # close write end
910
self.add_pipe(self.pipe[0])
911
def add_pipe(self, pipe):
1935
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1936
1937
proc = MultiprocessingMixIn.process_request(self, request,
1938
client_address)
1939
self.child_pipe.close()
1940
self.add_pipe(parent_pipe, proc)
1941
1942
def add_pipe(self, parent_pipe, proc):
912
1943
"""Dummy function; override as necessary"""
913
os.close(pipe)
914
915
916
class IPv6_TCPServer(ForkingMixInWithPipe,
1944
raise NotImplementedError()
1945
1946
1947
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
917
1948
socketserver.TCPServer, object):
918
1949
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
919
1950
922
1953
interface: None or a network interface name (string)
923
1954
use_ipv6: Boolean; to use IPv6 or not
924
1955
"""
1956
925
1957
def __init__(self, server_address, RequestHandlerClass,
926
interface=None, use_ipv6=True):
1958
interface=None,
1959
use_ipv6=True,
1960
socketfd=None):
1961
"""If socketfd is set, use that file descriptor instead of
1962
creating a new one with socket.socket().
1963
"""
927
1964
self.interface = interface
928
1965
if use_ipv6:
929
1966
self.address_family = socket.AF_INET6
1967
if socketfd is not None:
1968
# Save the file descriptor
1969
self.socketfd = socketfd
1970
# Save the original socket.socket() function
1971
self.socket_socket = socket.socket
1972
# To implement --socket, we monkey patch socket.socket.
1973
#
1974
# (When socketserver.TCPServer is a new-style class, we
1975
# could make self.socket into a property instead of monkey
1976
# patching socket.socket.)
1977
#
1978
# Create a one-time-only replacement for socket.socket()
1979
@functools.wraps(socket.socket)
1980
def socket_wrapper(*args, **kwargs):
1981
# Restore original function so subsequent calls are
1982
# not affected.
1983
socket.socket = self.socket_socket
1984
del self.socket_socket
1985
# This time only, return a new socket object from the
1986
# saved file descriptor.
1987
return socket.fromfd(self.socketfd, *args, **kwargs)
1988
# Replace socket.socket() function with wrapper
1989
socket.socket = socket_wrapper
1990
# The socketserver.TCPServer.__init__ will call
1991
# socket.socket(), which might be our replacement,
1992
# socket_wrapper(), if socketfd was set.
930
1993
socketserver.TCPServer.__init__(self, server_address,
931
1994
RequestHandlerClass)
1995
932
1996
def server_bind(self):
933
1997
"""This overrides the normal server_bind() function
934
1998
to bind to an interface if one was specified, and also NOT to
935
1999
bind to an address or port if they were not specified."""
936
2000
if self.interface is not None:
937
2001
if SO_BINDTODEVICE is None:
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
2002
logger.error("SO_BINDTODEVICE does not exist;"
2003
" cannot bind to interface %s",
940
2004
self.interface)
941
2005
else:
942
2006
try:
943
self.socket.setsockopt(socket.SOL_SOCKET,
944
SO_BINDTODEVICE,
945
str(self.interface
946
+ u'\0'))
947
except socket.error, error:
948
if error[0] == errno.EPERM:
949
logger.error(u"No permission to"
950
u" bind to interface %s",
951
self.interface)
952
elif error[0] == errno.ENOPROTOOPT:
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
955
self.interface)
2007
self.socket.setsockopt(
2008
socket.SOL_SOCKET, SO_BINDTODEVICE,
2009
(self.interface + "\0").encode("utf-8"))
2010
except socket.error as error:
2011
if error.errno == errno.EPERM:
2012
logger.error("No permission to bind to"
2013
" interface %s", self.interface)
2014
elif error.errno == errno.ENOPROTOOPT:
2015
logger.error("SO_BINDTODEVICE not available;"
2016
" cannot bind to interface %s",
2017
self.interface)
2018
elif error.errno == errno.ENODEV:
2019
logger.error("Interface %s does not exist,"
2020
" cannot bind", self.interface)
956
2021
else:
957
2022
raise
958
2023
# Only bind(2) the socket if we really need to.
959
2024
if self.server_address[0] or self.server_address[1]:
960
2025
if not self.server_address[0]:
961
2026
if self.address_family == socket.AF_INET6:
962
any_address = u"::" # in6addr_any
2027
any_address = "::" # in6addr_any
963
2028
else:
964
any_address = socket.INADDR_ANY
2029
any_address = "0.0.0.0" # INADDR_ANY
965
2030
self.server_address = (any_address,
966
2031
self.server_address[1])
967
2032
elif not self.server_address[1]:
968
self.server_address = (self.server_address[0],
969
0)
2033
self.server_address = (self.server_address[0], 0)
970
2034
# if self.interface:
971
2035
# self.server_address = (self.server_address[0],
972
2036
# 0, # port
983
2047
clients: set of Client objects
984
2048
gnutls_priority GnuTLS priority string
985
2049
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
989
2050
990
2051
Assumes a gobject.MainLoop event loop.
991
2052
"""
2053
992
2054
def __init__(self, server_address, RequestHandlerClass,
993
interface=None, use_ipv6=True, clients=None,
994
gnutls_priority=None, use_dbus=True):
2055
interface=None,
2056
use_ipv6=True,
2057
clients=None,
2058
gnutls_priority=None,
2059
use_dbus=True,
2060
socketfd=None):
995
2061
self.enabled = False
996
2062
self.clients = clients
997
2063
if self.clients is None:
998
self.clients = set()
2064
self.clients = {}
999
2065
self.use_dbus = use_dbus
1000
2066
self.gnutls_priority = gnutls_priority
1001
2067
IPv6_TCPServer.__init__(self, server_address,
1002
2068
RequestHandlerClass,
1003
2069
interface = interface,
1004
use_ipv6 = use_ipv6)
2070
use_ipv6 = use_ipv6,
2071
socketfd = socketfd)
2072
1005
2073
def server_activate(self):
1006
2074
if self.enabled:
1007
2075
return socketserver.TCPServer.server_activate(self)
2076
1008
2077
def enable(self):
1009
2078
self.enabled = True
1010
def add_pipe(self, pipe):
2079
2080
def add_pipe(self, parent_pipe, proc):
1011
2081
# Call "handle_ipc" for both data and EOF events
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
self.handle_ipc)
1014
def handle_ipc(self, source, condition, file_objects={}):
1015
condition_names = {
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1018
# blocking).
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1022
# broken, usually for pipes and
1023
# sockets).
1024
}
1025
conditions_string = ' | '.join(name
1026
for cond, name in
1027
condition_names.iteritems()
1028
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1030
conditions_string)
1031
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1035
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1042
1043
# Stop calling this function
1044
return False
1045
1046
logger.debug(u"IPC command: %r", cmdline)
1047
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1053
args)
1054
if self.use_dbus:
1055
# Emit D-Bus signal
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1061
if self.use_dbus:
1062
# Emit D-Bus signal
1063
client.Rejected()
1064
break
1065
else:
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1071
client.checked_ok()
1072
if self.use_dbus:
1073
# Emit D-Bus signal
1074
client.ReceivedSecret()
1075
break
1076
else:
1077
logger.error(u"Sending secret to unknown client %s",
1078
args)
2082
gobject.io_add_watch(
2083
parent_pipe.fileno(),
2084
gobject.IO_IN | gobject.IO_HUP,
2085
functools.partial(self.handle_ipc,
2086
parent_pipe = parent_pipe,
2087
proc = proc))
2088
2089
def handle_ipc(self, source, condition,
2090
parent_pipe=None,
2091
proc = None,
2092
client_object=None):
2093
# error, or the other end of multiprocessing.Pipe has closed
2094
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2095
# Wait for other process to exit
2096
proc.join()
2097
return False
2098
2099
# Read a request from the child
2100
request = parent_pipe.recv()
2101
command = request[0]
2102
2103
if command == 'init':
2104
fpr = request[1]
2105
address = request[2]
2106
2107
for c in self.clients.itervalues():
2108
if c.fingerprint == fpr:
2109
client = c
2110
break
2111
else:
2112
logger.info("Client not found for fingerprint: %s, ad"
2113
"dress: %s", fpr, address)
2114
if self.use_dbus:
2115
# Emit D-Bus signal
2116
mandos_dbus_service.ClientNotFound(fpr,
2117
address[0])
2118
parent_pipe.send(False)
2119
return False
2120
2121
gobject.io_add_watch(
2122
parent_pipe.fileno(),
2123
gobject.IO_IN | gobject.IO_HUP,
2124
functools.partial(self.handle_ipc,
2125
parent_pipe = parent_pipe,
2126
proc = proc,
2127
client_object = client))
2128
parent_pipe.send(True)
2129
# remove the old hook in favor of the new above hook on
2130
# same fileno
2131
return False
2132
if command == 'funcall':
2133
funcname = request[1]
2134
args = request[2]
2135
kwargs = request[3]
2136
2137
parent_pipe.send(('data', getattr(client_object,
2138
funcname)(*args,
2139
**kwargs)))
2140
2141
if command == 'getattr':
2142
attrname = request[1]
2143
if callable(client_object.__getattribute__(attrname)):
2144
parent_pipe.send(('function', ))
2145
else:
2146
parent_pipe.send((
2147
'data', client_object.__getattribute__(attrname)))
2148
2149
if command == 'setattr':
2150
attrname = request[1]
2151
value = request[2]
2152
setattr(client_object, attrname, value)
2153
2154
return True
2155
2156
2157
def rfc3339_duration_to_delta(duration):
2158
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2159
2160
>>> rfc3339_duration_to_delta("P7D")
2161
datetime.timedelta(7)
2162
>>> rfc3339_duration_to_delta("PT60S")
2163
datetime.timedelta(0, 60)
2164
>>> rfc3339_duration_to_delta("PT60M")
2165
datetime.timedelta(0, 3600)
2166
>>> rfc3339_duration_to_delta("PT24H")
2167
datetime.timedelta(1)
2168
>>> rfc3339_duration_to_delta("P1W")
2169
datetime.timedelta(7)
2170
>>> rfc3339_duration_to_delta("PT5M30S")
2171
datetime.timedelta(0, 330)
2172
>>> rfc3339_duration_to_delta("P1DT3M20S")
2173
datetime.timedelta(1, 200)
2174
"""
2175
2176
# Parsing an RFC 3339 duration with regular expressions is not
2177
# possible - there would have to be multiple places for the same
2178
# values, like seconds. The current code, while more esoteric, is
2179
# cleaner without depending on a parsing library. If Python had a
2180
# built-in library for parsing we would use it, but we'd like to
2181
# avoid excessive use of external libraries.
2182
2183
# New type for defining tokens, syntax, and semantics all-in-one
2184
Token = collections.namedtuple("Token",
2185
("regexp", # To match token; if
2186
# "value" is not None,
2187
# must have a "group"
2188
# containing digits
2189
"value", # datetime.timedelta or
2190
# None
2191
"followers")) # Tokens valid after
2192
# this token
2193
Token = collections.namedtuple("Token", (
2194
"regexp", # To match token; if "value" is not None, must have
2195
# a "group" containing digits
2196
"value", # datetime.timedelta or None
2197
"followers")) # Tokens valid after this token
2198
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2199
# the "duration" ABNF definition in RFC 3339, Appendix A.
2200
token_end = Token(re.compile(r"$"), None, frozenset())
2201
token_second = Token(re.compile(r"(\d+)S"),
2202
datetime.timedelta(seconds=1),
2203
frozenset((token_end, )))
2204
token_minute = Token(re.compile(r"(\d+)M"),
2205
datetime.timedelta(minutes=1),
2206
frozenset((token_second, token_end)))
2207
token_hour = Token(re.compile(r"(\d+)H"),
2208
datetime.timedelta(hours=1),
2209
frozenset((token_minute, token_end)))
2210
token_time = Token(re.compile(r"T"),
2211
None,
2212
frozenset((token_hour, token_minute,
2213
token_second)))
2214
token_day = Token(re.compile(r"(\d+)D"),
2215
datetime.timedelta(days=1),
2216
frozenset((token_time, token_end)))
2217
token_month = Token(re.compile(r"(\d+)M"),
2218
datetime.timedelta(weeks=4),
2219
frozenset((token_day, token_end)))
2220
token_year = Token(re.compile(r"(\d+)Y"),
2221
datetime.timedelta(weeks=52),
2222
frozenset((token_month, token_end)))
2223
token_week = Token(re.compile(r"(\d+)W"),
2224
datetime.timedelta(weeks=1),
2225
frozenset((token_end, )))
2226
token_duration = Token(re.compile(r"P"), None,
2227
frozenset((token_year, token_month,
2228
token_day, token_time,
2229
token_week)))
2230
# Define starting values
2231
value = datetime.timedelta() # Value so far
2232
found_token = None
2233
followers = frozenset((token_duration,)) # Following valid tokens
2234
s = duration # String left to parse
2235
# Loop until end token is found
2236
while found_token is not token_end:
2237
# Search for any currently valid tokens
2238
for token in followers:
2239
match = token.regexp.match(s)
2240
if match is not None:
2241
# Token found
2242
if token.value is not None:
2243
# Value found, parse digits
2244
factor = int(match.group(1), 10)
2245
# Add to value so far
2246
value += factor * token.value
2247
# Strip token from string
2248
s = token.regexp.sub("", s, 1)
2249
# Go to found token
2250
found_token = token
2251
# Set valid next tokens
2252
followers = found_token.followers
2253
break
1079
2254
else:
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1081
1082
# Keep calling this function
1083
return True
2255
# No currently valid tokens were found
2256
raise ValueError("Invalid RFC 3339 duration")
2257
# End token found
2258
return value
1084
2259
1085
2260
1086
2261
def string_to_delta(interval):
1087
2262
"""Parse a string and return a datetime.timedelta
1088
2263
1089
>>> string_to_delta(u'7d')
2264
>>> string_to_delta('7d')
1090
2265
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
2266
>>> string_to_delta('60s')
1092
2267
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
2268
>>> string_to_delta('60m')
1094
2269
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
2270
>>> string_to_delta('24h')
1096
2271
datetime.timedelta(1)
1097
>>> string_to_delta(u'1w')
2272
>>> string_to_delta('1w')
1098
2273
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
2274
>>> string_to_delta('5m 30s')
1100
2275
datetime.timedelta(0, 330)
1101
2276
"""
2277
2278
try:
2279
return rfc3339_duration_to_delta(interval)
2280
except ValueError:
2281
pass
2282
1102
2283
timevalue = datetime.timedelta(0)
1103
2284
for s in interval.split():
1104
2285
try:
1105
suffix = unicode(s[-1])
2286
suffix = s[-1]
1106
2287
value = int(s[:-1])
1107
if suffix == u"d":
2288
if suffix == "d":
1108
2289
delta = datetime.timedelta(value)
1109
elif suffix == u"s":
2290
elif suffix == "s":
1110
2291
delta = datetime.timedelta(0, value)
1111
elif suffix == u"m":
2292
elif suffix == "m":
1112
2293
delta = datetime.timedelta(0, 0, 0, 0, value)
1113
elif suffix == u"h":
2294
elif suffix == "h":
1114
2295
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1115
elif suffix == u"w":
2296
elif suffix == "w":
1116
2297
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1117
2298
else:
1118
raise ValueError
1119
except (ValueError, IndexError):
1120
raise ValueError
2299
raise ValueError("Unknown suffix {!r}".format(suffix))
2300
except IndexError as e:
2301
raise ValueError(*(e.args))
1121
2302
timevalue += delta
1122
2303
return timevalue
1123
2304
1124
2305
1125
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
1129
global if_nametoindex
1130
try:
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
1133
.if_nametoindex)
1134
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
1136
def if_nametoindex(interface):
1137
"Get an interface index the hard way, i.e. using fcntl()"
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
with closing(socket.socket()) as s:
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
1145
return interface_index
1146
return if_nametoindex(interface)
1147
1148
1149
2306
def daemon(nochdir = False, noclose = False):
1150
2307
"""See daemon(3). Standard BSD Unix function.
1151
2308
1154
2311
sys.exit()
1155
2312
os.setsid()
1156
2313
if not nochdir:
1157
os.chdir(u"/")
2314
os.chdir("/")
1158
2315
if os.fork():
1159
2316
sys.exit()
1160
2317
if not noclose:
1161
2318
# Close all standard open file descriptors
1162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2319
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1163
2320
if not stat.S_ISCHR(os.fstat(null).st_mode):
1164
2321
raise OSError(errno.ENODEV,
1165
u"/dev/null not a character device")
2322
"{} not a character device"
2323
.format(os.devnull))
1166
2324
os.dup2(null, sys.stdin.fileno())
1167
2325
os.dup2(null, sys.stdout.fileno())
1168
2326
os.dup2(null, sys.stderr.fileno())
1172
2330
1173
2331
def main():
1174
2332
1175
######################################################################
2333
##################################################################
1176
2334
# Parsing of options, both command line and config file
1177
2335
1178
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
1203
options = parser.parse_args()[0]
2336
parser = argparse.ArgumentParser()
2337
parser.add_argument("-v", "--version", action="version",
2338
version = "%(prog)s {}".format(version),
2339
help="show version number and exit")
2340
parser.add_argument("-i", "--interface", metavar="IF",
2341
help="Bind to interface IF")
2342
parser.add_argument("-a", "--address",
2343
help="Address to listen for requests on")
2344
parser.add_argument("-p", "--port", type=int,
2345
help="Port number to receive requests on")
2346
parser.add_argument("--check", action="store_true",
2347
help="Run self-test")
2348
parser.add_argument("--debug", action="store_true",
2349
help="Debug mode; run in foreground and log"
2350
" to terminal", default=None)
2351
parser.add_argument("--debuglevel", metavar="LEVEL",
2352
help="Debug level for stdout output")
2353
parser.add_argument("--priority", help="GnuTLS"
2354
" priority string (see GnuTLS documentation)")
2355
parser.add_argument("--servicename",
2356
metavar="NAME", help="Zeroconf service name")
2357
parser.add_argument("--configdir",
2358
default="/etc/mandos", metavar="DIR",
2359
help="Directory to search for configuration"
2360
" files")
2361
parser.add_argument("--no-dbus", action="store_false",
2362
dest="use_dbus", help="Do not provide D-Bus"
2363
" system bus interface", default=None)
2364
parser.add_argument("--no-ipv6", action="store_false",
2365
dest="use_ipv6", help="Do not use IPv6",
2366
default=None)
2367
parser.add_argument("--no-restore", action="store_false",
2368
dest="restore", help="Do not restore stored"
2369
" state", default=None)
2370
parser.add_argument("--socket", type=int,
2371
help="Specify a file descriptor to a network"
2372
" socket to use instead of creating one")
2373
parser.add_argument("--statedir", metavar="DIR",
2374
help="Directory to save/restore state in")
2375
parser.add_argument("--foreground", action="store_true",
2376
help="Run in foreground", default=None)
2377
parser.add_argument("--no-zeroconf", action="store_false",
2378
dest="zeroconf", help="Do not use Zeroconf",
2379
default=None)
2380
2381
options = parser.parse_args()
1204
2382
1205
2383
if options.check:
1206
2384
import doctest
1207
doctest.testmod()
1208
sys.exit()
2385
fail_count, test_count = doctest.testmod()
2386
sys.exit(os.EX_OK if fail_count == 0 else 1)
1209
2387
1210
2388
# Default values for config file for server-global settings
1211
server_defaults = { u"interface": u"",
1212
u"address": u"",
1213
u"port": u"",
1214
u"debug": u"False",
1215
u"priority":
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
1220
}
2389
server_defaults = { "interface": "",
2390
"address": "",
2391
"port": "",
2392
"debug": "False",
2393
"priority":
2394
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2395
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2396
"servicename": "Mandos",
2397
"use_dbus": "True",
2398
"use_ipv6": "True",
2399
"debuglevel": "",
2400
"restore": "True",
2401
"socket": "",
2402
"statedir": "/var/lib/mandos",
2403
"foreground": "False",
2404
"zeroconf": "True",
2405
}
1221
2406
1222
2407
# Parse config file for server-global settings
1223
2408
server_config = configparser.SafeConfigParser(server_defaults)
1224
2409
del server_defaults
1225
server_config.read(os.path.join(options.configdir,
1226
u"mandos.conf"))
2410
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1227
2411
# Convert the SafeConfigParser object to a dict
1228
2412
server_settings = server_config.defaults()
1229
2413
# Use the appropriate methods on the non-string config options
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
2414
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2415
server_settings[option] = server_config.getboolean("DEFAULT",
1232
2416
option)
1233
2417
if server_settings["port"]:
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
2418
server_settings["port"] = server_config.getint("DEFAULT",
2419
"port")
2420
if server_settings["socket"]:
2421
server_settings["socket"] = server_config.getint("DEFAULT",
2422
"socket")
2423
# Later, stdin will, and stdout and stderr might, be dup'ed
2424
# over with an opened os.devnull. But we don't want this to
2425
# happen with a supplied network socket.
2426
if 0 <= server_settings["socket"] <= 2:
2427
server_settings["socket"] = os.dup(server_settings
2428
["socket"])
1236
2429
del server_config
1237
2430
1238
2431
# Override the settings from the config file with command line
1239
2432
# options, if set.
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
2433
for option in ("interface", "address", "port", "debug",
2434
"priority", "servicename", "configdir", "use_dbus",
2435
"use_ipv6", "debuglevel", "restore", "statedir",
2436
"socket", "foreground", "zeroconf"):
1243
2437
value = getattr(options, option)
1244
2438
if value is not None:
1245
2439
server_settings[option] = value
1246
2440
del options
1247
2441
# Force all strings to be unicode
1248
2442
for option in server_settings.keys():
1249
if type(server_settings[option]) is str:
1250
server_settings[option] = unicode(server_settings[option])
2443
if isinstance(server_settings[option], bytes):
2444
server_settings[option] = (server_settings[option]
2445
.decode("utf-8"))
2446
# Force all boolean options to be boolean
2447
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2448
"foreground", "zeroconf"):
2449
server_settings[option] = bool(server_settings[option])
2450
# Debug implies foreground
2451
if server_settings["debug"]:
2452
server_settings["foreground"] = True
1251
2453
# Now we have our good server settings in "server_settings"
1252
2454
1253
2455
##################################################################
1254
2456
2457
if (not server_settings["zeroconf"]
2458
and not (server_settings["port"]
2459
or server_settings["socket"] != "")):
2460
parser.error("Needs port or socket to work without Zeroconf")
2461
1255
2462
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
1259
1260
if not debug:
1261
syslogger.setLevel(logging.WARNING)
1262
console.setLevel(logging.WARNING)
1263
1264
if server_settings[u"servicename"] != u"Mandos":
1265
syslogger.setFormatter(logging.Formatter
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
2463
debug = server_settings["debug"]
2464
debuglevel = server_settings["debuglevel"]
2465
use_dbus = server_settings["use_dbus"]
2466
use_ipv6 = server_settings["use_ipv6"]
2467
stored_state_path = os.path.join(server_settings["statedir"],
2468
stored_state_file)
2469
foreground = server_settings["foreground"]
2470
zeroconf = server_settings["zeroconf"]
2471
2472
if debug:
2473
initlogger(debug, logging.DEBUG)
2474
else:
2475
if not debuglevel:
2476
initlogger(debug)
2477
else:
2478
level = getattr(logging, debuglevel.upper())
2479
initlogger(debug, level)
2480
2481
if server_settings["servicename"] != "Mandos":
2482
syslogger.setFormatter(
2483
logging.Formatter('Mandos ({}) [%(process)d]:'
2484
' %(levelname)s: %(message)s'.format(
2485
server_settings["servicename"])))
1269
2486
1270
2487
# Parse config file with clients
1271
client_defaults = { u"timeout": u"1h",
1272
u"interval": u"5m",
1273
u"checker": u"fping -q -- %%(host)s",
1274
u"host": u"",
1275
}
1276
client_config = configparser.SafeConfigParser(client_defaults)
1277
client_config.read(os.path.join(server_settings[u"configdir"],
1278
u"clients.conf"))
2488
client_config = configparser.SafeConfigParser(Client
2489
.client_defaults)
2490
client_config.read(os.path.join(server_settings["configdir"],
2491
"clients.conf"))
1279
2492
1280
2493
global mandos_dbus_service
1281
2494
mandos_dbus_service = None
1282
2495
1283
tcp_server = MandosServer((server_settings[u"address"],
1284
server_settings[u"port"]),
1285
ClientHandler,
1286
interface=server_settings[u"interface"],
1287
use_ipv6=use_ipv6,
1288
gnutls_priority=
1289
server_settings[u"priority"],
1290
use_dbus=use_dbus)
1291
pidfilename = u"/var/run/mandos.pid"
1292
try:
1293
pidfile = open(pidfilename, u"w")
1294
except IOError:
1295
logger.error(u"Could not open file %r", pidfilename)
2496
socketfd = None
2497
if server_settings["socket"] != "":
2498
socketfd = server_settings["socket"]
2499
tcp_server = MandosServer(
2500
(server_settings["address"], server_settings["port"]),
2501
ClientHandler,
2502
interface=(server_settings["interface"] or None),
2503
use_ipv6=use_ipv6,
2504
gnutls_priority=server_settings["priority"],
2505
use_dbus=use_dbus,
2506
socketfd=socketfd)
2507
if not foreground:
2508
pidfilename = "/run/mandos.pid"
2509
if not os.path.isdir("/run/."):
2510
pidfilename = "/var/run/mandos.pid"
2511
pidfile = None
2512
try:
2513
pidfile = open(pidfilename, "w")
2514
except IOError as e:
2515
logger.error("Could not open file %r", pidfilename,
2516
exc_info=e)
1296
2517
1297
try:
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
1300
except KeyError:
2518
for name in ("_mandos", "mandos", "nobody"):
1301
2519
try:
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
2520
uid = pwd.getpwnam(name).pw_uid
2521
gid = pwd.getpwnam(name).pw_gid
2522
break
1304
2523
except KeyError:
1305
try:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1308
except KeyError:
1309
uid = 65534
1310
gid = 65534
2524
continue
2525
else:
2526
uid = 65534
2527
gid = 65534
1311
2528
try:
1312
2529
os.setgid(gid)
1313
2530
os.setuid(uid)
1314
except OSError, error:
1315
if error[0] != errno.EPERM:
1316
raise error
2531
except OSError as error:
2532
if error.errno != errno.EPERM:
2533
raise
1317
2534
1318
# Enable all possible GnuTLS debugging
1319
2535
if debug:
2536
# Enable all possible GnuTLS debugging
2537
1320
2538
# "Use a log level over 10 to enable all debugging options."
1321
2539
# - GnuTLS manual
1322
2540
gnutls.library.functions.gnutls_global_set_log_level(11)
1323
2541
1324
2542
@gnutls.library.types.gnutls_log_func
1325
2543
def debug_gnutls(level, string):
1326
logger.debug(u"GnuTLS: %s", string[:-1])
1327
1328
(gnutls.library.functions
1329
.gnutls_global_set_log_function(debug_gnutls))
2544
logger.debug("GnuTLS: %s", string[:-1])
2545
2546
gnutls.library.functions.gnutls_global_set_log_function(
2547
debug_gnutls)
2548
2549
# Redirect stdin so all checkers get /dev/null
2550
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2551
os.dup2(null, sys.stdin.fileno())
2552
if null > 2:
2553
os.close(null)
2554
2555
# Need to fork before connecting to D-Bus
2556
if not foreground:
2557
# Close all input and output, do double fork, etc.
2558
daemon()
2559
2560
# multiprocessing will use threads, so before we use gobject we
2561
# need to inform gobject that threads will be used.
2562
gobject.threads_init()
1330
2563
1331
2564
global main_loop
1332
2565
# From the Avahi example code
1333
DBusGMainLoop(set_as_default=True )
2566
DBusGMainLoop(set_as_default=True)
1334
2567
main_loop = gobject.MainLoop()
1335
2568
bus = dbus.SystemBus()
1336
2569
# End of Avahi example code
1337
2570
if use_dbus:
1338
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1340
service = AvahiService(name = server_settings[u"servicename"],
1341
servicetype = u"_mandos._tcp",
1342
protocol = protocol, bus = bus)
1343
if server_settings["interface"]:
1344
service.interface = (if_nametoindex
1345
(str(server_settings[u"interface"])))
2571
try:
2572
bus_name = dbus.service.BusName("se.recompile.Mandos",
2573
bus,
2574
do_not_queue=True)
2575
old_bus_name = dbus.service.BusName(
2576
"se.bsnet.fukt.Mandos", bus,
2577
do_not_queue=True)
2578
except dbus.exceptions.NameExistsException as e:
2579
logger.error("Disabling D-Bus:", exc_info=e)
2580
use_dbus = False
2581
server_settings["use_dbus"] = False
2582
tcp_server.use_dbus = False
2583
if zeroconf:
2584
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2585
service = AvahiServiceToSyslog(
2586
name = server_settings["servicename"],
2587
servicetype = "_mandos._tcp",
2588
protocol = protocol,
2589
bus = bus)
2590
if server_settings["interface"]:
2591
service.interface = if_nametoindex(
2592
server_settings["interface"].encode("utf-8"))
2593
2594
global multiprocessing_manager
2595
multiprocessing_manager = multiprocessing.Manager()
1346
2596
1347
2597
client_class = Client
1348
2598
if use_dbus:
1349
2599
client_class = functools.partial(ClientDBus, bus = bus)
1350
tcp_server.clients.update(set(
1351
client_class(name = section,
1352
config= dict(client_config.items(section)))
1353
for section in client_config.sections()))
2600
2601
client_settings = Client.config_parser(client_config)
2602
old_client_settings = {}
2603
clients_data = {}
2604
2605
# This is used to redirect stdout and stderr for checker processes
2606
global wnull
2607
wnull = open(os.devnull, "w") # A writable /dev/null
2608
# Only used if server is running in foreground but not in debug
2609
# mode
2610
if debug or not foreground:
2611
wnull.close()
2612
2613
# Get client data and settings from last running state.
2614
if server_settings["restore"]:
2615
try:
2616
with open(stored_state_path, "rb") as stored_state:
2617
clients_data, old_client_settings = pickle.load(
2618
stored_state)
2619
os.remove(stored_state_path)
2620
except IOError as e:
2621
if e.errno == errno.ENOENT:
2622
logger.warning("Could not load persistent state:"
2623
" {}".format(os.strerror(e.errno)))
2624
else:
2625
logger.critical("Could not load persistent state:",
2626
exc_info=e)
2627
raise
2628
except EOFError as e:
2629
logger.warning("Could not load persistent state: "
2630
"EOFError:",
2631
exc_info=e)
2632
2633
with PGPEngine() as pgp:
2634
for client_name, client in clients_data.items():
2635
# Skip removed clients
2636
if client_name not in client_settings:
2637
continue
2638
2639
# Decide which value to use after restoring saved state.
2640
# We have three different values: Old config file,
2641
# new config file, and saved state.
2642
# New config value takes precedence if it differs from old
2643
# config value, otherwise use saved state.
2644
for name, value in client_settings[client_name].items():
2645
try:
2646
# For each value in new config, check if it
2647
# differs from the old config value (Except for
2648
# the "secret" attribute)
2649
if (name != "secret"
2650
and (value !=
2651
old_client_settings[client_name][name])):
2652
client[name] = value
2653
except KeyError:
2654
pass
2655
2656
# Clients who has passed its expire date can still be
2657
# enabled if its last checker was successful. Clients
2658
# whose checker succeeded before we stored its state is
2659
# assumed to have successfully run all checkers during
2660
# downtime.
2661
if client["enabled"]:
2662
if datetime.datetime.utcnow() >= client["expires"]:
2663
if not client["last_checked_ok"]:
2664
logger.warning(
2665
"disabling client {} - Client never "
2666
"performed a successful checker".format(
2667
client_name))
2668
client["enabled"] = False
2669
elif client["last_checker_status"] != 0:
2670
logger.warning(
2671
"disabling client {} - Client last"
2672
" checker failed with error code"
2673
" {}".format(
2674
client_name,
2675
client["last_checker_status"]))
2676
client["enabled"] = False
2677
else:
2678
client["expires"] = (
2679
datetime.datetime.utcnow()
2680
+ client["timeout"])
2681
logger.debug("Last checker succeeded,"
2682
" keeping {} enabled".format(
2683
client_name))
2684
try:
2685
client["secret"] = pgp.decrypt(
2686
client["encrypted_secret"],
2687
client_settings[client_name]["secret"])
2688
except PGPError:
2689
# If decryption fails, we use secret from new settings
2690
logger.debug("Failed to decrypt {} old secret".format(
2691
client_name))
2692
client["secret"] = (client_settings[client_name]
2693
["secret"])
2694
2695
# Add/remove clients based on new changes made to config
2696
for client_name in (set(old_client_settings)
2697
- set(client_settings)):
2698
del clients_data[client_name]
2699
for client_name in (set(client_settings)
2700
- set(old_client_settings)):
2701
clients_data[client_name] = client_settings[client_name]
2702
2703
# Create all client objects
2704
for client_name, client in clients_data.items():
2705
tcp_server.clients[client_name] = client_class(
2706
name = client_name,
2707
settings = client,
2708
server_settings = server_settings)
2709
1354
2710
if not tcp_server.clients:
1355
logger.warning(u"No clients defined")
1356
1357
if debug:
1358
# Redirect stdin so all checkers get /dev/null
1359
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1360
os.dup2(null, sys.stdin.fileno())
1361
if null > 2:
1362
os.close(null)
1363
else:
1364
# No console logging
1365
logger.removeHandler(console)
1366
# Close all input and output, do double fork, etc.
1367
daemon()
1368
1369
try:
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
2711
logger.warning("No clients defined")
2712
2713
if not foreground:
2714
if pidfile is not None:
2715
try:
2716
with pidfile:
2717
pid = os.getpid()
2718
pidfile.write("{}\n".format(pid).encode("utf-8"))
2719
except IOError:
2720
logger.error("Could not write to file %r with PID %d",
2721
pidfilename, pid)
1373
2722
del pidfile
1374
except IOError:
1375
logger.error(u"Could not write to file %r with PID %d",
1376
pidfilename, pid)
1377
except NameError:
1378
# "pidfile" was never created
1379
pass
1380
del pidfilename
1381
1382
def cleanup():
1383
"Cleanup function; run on exit"
1384
service.cleanup()
1385
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1388
client.disable_hook = None
1389
client.disable()
1390
1391
atexit.register(cleanup)
1392
1393
if not debug:
1394
signal.signal(signal.SIGINT, signal.SIG_IGN)
2723
del pidfilename
2724
1395
2725
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1396
2726
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1397
2727
1398
2728
if use_dbus:
1399
class MandosDBusService(dbus.service.Object):
2729
2730
@alternate_dbus_interfaces(
2731
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2732
class MandosDBusService(DBusObjectWithProperties):
1400
2733
"""A D-Bus proxy object"""
2734
1401
2735
def __init__(self):
1402
dbus.service.Object.__init__(self, bus, u"/")
1403
_interface = u"se.bsnet.fukt.Mandos"
1404
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1406
def ClientAdded(self, objpath, properties):
1407
"D-Bus signal"
1408
pass
1409
1410
@dbus.service.signal(_interface, signature=u"s")
1411
def ClientNotFound(self, fingerprint):
1412
"D-Bus signal"
1413
pass
1414
1415
@dbus.service.signal(_interface, signature=u"os")
2736
dbus.service.Object.__init__(self, bus, "/")
2737
2738
_interface = "se.recompile.Mandos"
2739
2740
@dbus_interface_annotations(_interface)
2741
def _foo(self):
2742
return {
2743
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2744
"false" }
2745
2746
@dbus.service.signal(_interface, signature="o")
2747
def ClientAdded(self, objpath):
2748
"D-Bus signal"
2749
pass
2750
2751
@dbus.service.signal(_interface, signature="ss")
2752
def ClientNotFound(self, fingerprint, address):
2753
"D-Bus signal"
2754
pass
2755
2756
@dbus.service.signal(_interface, signature="os")
1416
2757
def ClientRemoved(self, objpath, name):
1417
2758
"D-Bus signal"
1418
2759
pass
1419
2760
1420
@dbus.service.method(_interface, out_signature=u"ao")
2761
@dbus.service.method(_interface, out_signature="ao")
1421
2762
def GetAllClients(self):
1422
2763
"D-Bus method"
1423
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
2764
return dbus.Array(c.dbus_object_path for c in
2765
tcp_server.clients.itervalues())
1425
2766
1426
2767
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
2768
out_signature="a{oa{sv}}")
1428
2769
def GetAllClientsWithProperties(self):
1429
2770
"D-Bus method"
1430
2771
return dbus.Dictionary(
1431
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
2772
{ c.dbus_object_path: c.GetAll("")
2773
for c in tcp_server.clients.itervalues() },
2774
signature="oa{sv}")
1434
2775
1435
@dbus.service.method(_interface, in_signature=u"o")
2776
@dbus.service.method(_interface, in_signature="o")
1436
2777
def RemoveClient(self, object_path):
1437
2778
"D-Bus method"
1438
for c in tcp_server.clients:
2779
for c in tcp_server.clients.itervalues():
1439
2780
if c.dbus_object_path == object_path:
1440
tcp_server.clients.remove(c)
2781
del tcp_server.clients[c.name]
1441
2782
c.remove_from_connection()
1442
2783
# Don't signal anything except ClientRemoved
1443
c.disable(signal=False)
2784
c.disable(quiet=True)
1444
2785
# Emit D-Bus signal
1445
2786
self.ClientRemoved(object_path, c.name)
1446
2787
return
1447
raise KeyError
2788
raise KeyError(object_path)
1448
2789
1449
2790
del _interface
1450
2791
1451
2792
mandos_dbus_service = MandosDBusService()
1452
2793
1453
for client in tcp_server.clients:
2794
def cleanup():
2795
"Cleanup function; run on exit"
2796
if zeroconf:
2797
service.cleanup()
2798
2799
multiprocessing.active_children()
2800
wnull.close()
2801
if not (tcp_server.clients or client_settings):
2802
return
2803
2804
# Store client before exiting. Secrets are encrypted with key
2805
# based on what config file has. If config file is
2806
# removed/edited, old secret will thus be unrecovable.
2807
clients = {}
2808
with PGPEngine() as pgp:
2809
for client in tcp_server.clients.itervalues():
2810
key = client_settings[client.name]["secret"]
2811
client.encrypted_secret = pgp.encrypt(client.secret,
2812
key)
2813
client_dict = {}
2814
2815
# A list of attributes that can not be pickled
2816
# + secret.
2817
exclude = { "bus", "changedstate", "secret",
2818
"checker", "server_settings" }
2819
for name, typ in inspect.getmembers(dbus.service
2820
.Object):
2821
exclude.add(name)
2822
2823
client_dict["encrypted_secret"] = (client
2824
.encrypted_secret)
2825
for attr in client.client_structure:
2826
if attr not in exclude:
2827
client_dict[attr] = getattr(client, attr)
2828
2829
clients[client.name] = client_dict
2830
del client_settings[client.name]["secret"]
2831
2832
try:
2833
with tempfile.NamedTemporaryFile(
2834
mode='wb',
2835
suffix=".pickle",
2836
prefix='clients-',
2837
dir=os.path.dirname(stored_state_path),
2838
delete=False) as stored_state:
2839
pickle.dump((clients, client_settings), stored_state)
2840
tempname = stored_state.name
2841
os.rename(tempname, stored_state_path)
2842
except (IOError, OSError) as e:
2843
if not debug:
2844
try:
2845
os.remove(tempname)
2846
except NameError:
2847
pass
2848
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2849
logger.warning("Could not save persistent state: {}"
2850
.format(os.strerror(e.errno)))
2851
else:
2852
logger.warning("Could not save persistent state:",
2853
exc_info=e)
2854
raise
2855
2856
# Delete all clients, and settings from config
2857
while tcp_server.clients:
2858
name, client = tcp_server.clients.popitem()
2859
if use_dbus:
2860
client.remove_from_connection()
2861
# Don't signal anything except ClientRemoved
2862
client.disable(quiet=True)
2863
if use_dbus:
2864
# Emit D-Bus signal
2865
mandos_dbus_service.ClientRemoved(
2866
client.dbus_object_path, client.name)
2867
client_settings.clear()
2868
2869
atexit.register(cleanup)
2870
2871
for client in tcp_server.clients.itervalues():
1454
2872
if use_dbus:
1455
2873
# Emit D-Bus signal
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1458
client.enable()
2874
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2875
# Need to initiate checking of clients
2876
if client.enabled:
2877
client.init_checker()
1459
2878
1460
2879
tcp_server.enable()
1461
2880
tcp_server.server_activate()
1462
2881
1463
2882
# Find out what port we got
1464
service.port = tcp_server.socket.getsockname()[1]
2883
if zeroconf:
2884
service.port = tcp_server.socket.getsockname()[1]
1465
2885
if use_ipv6:
1466
logger.info(u"Now listening on address %r, port %d,"
1467
" flowinfo %d, scope_id %d"
1468
% tcp_server.socket.getsockname())
2886
logger.info("Now listening on address %r, port %d,"
2887
" flowinfo %d, scope_id %d",
2888
*tcp_server.socket.getsockname())
1469
2889
else: # IPv4
1470
logger.info(u"Now listening on address %r, port %d"
1471
% tcp_server.socket.getsockname())
2890
logger.info("Now listening on address %r, port %d",
2891
*tcp_server.socket.getsockname())
1472
2892
1473
2893
#service.interface = tcp_server.socket.getsockname()[3]
1474
2894
1475
2895
try:
1476
# From the Avahi example code
1477
try:
1478
service.activate()
1479
except dbus.exceptions.DBusException, error:
1480
logger.critical(u"DBusException: %s", error)
1481
sys.exit(1)
1482
# End of Avahi example code
2896
if zeroconf:
2897
# From the Avahi example code
2898
try:
2899
service.activate()
2900
except dbus.exceptions.DBusException as error:
2901
logger.critical("D-Bus Exception", exc_info=error)
2902
cleanup()
2903
sys.exit(1)
2904
# End of Avahi example code
1483
2905
1484
2906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1485
2907
lambda *args, **kwargs:
1486
2908
(tcp_server.handle_request
1487
2909
(*args[2:], **kwargs) or True))
1488
2910
1489
logger.debug(u"Starting main loop")
2911
logger.debug("Starting main loop")
1490
2912
main_loop.run()
1491
except AvahiError, error:
1492
logger.critical(u"AvahiError: %s", error)
2913
except AvahiError as error:
2914
logger.critical("Avahi Error", exc_info=error)
2915
cleanup()
1493
2916
sys.exit(1)
1494
2917
except KeyboardInterrupt:
1495
2918
if debug:
1496
print >> sys.stderr
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
2919
print("", file=sys.stderr)
2920
logger.debug("Server received KeyboardInterrupt")
2921
logger.debug("Server exiting")
2922
# Must run before the D-Bus bus name gets deregistered
2923
cleanup()
2924
1499
2925
1500
2926
if __name__ == '__main__':
1501
2927
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0