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- Committer: Teddy Hogeborn
- Date: 2014-06-07 21:59:20 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 317.
- Revision ID: teddy@recompile.se-20140607215920-r4qkj7ktnjyqmrn5
Make mandos-client use fexecve().
* plugins.d/mandos-client.d (run_network_hooks): Use fexecve().
* plugins.d/mandos-client.d (run_network_hooks): Use fexecve().
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
31
32
#
32
33
33
from __future__ import division
34
35
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
import SocketServer as socketserver
36
40
import socket
37
from optparse import OptionParser
41
import argparse
38
42
import datetime
39
43
import errno
40
44
import gnutls.crypto
43
47
import gnutls.library.functions
44
48
import gnutls.library.constants
45
49
import gnutls.library.types
46
import ConfigParser
50
import ConfigParser as configparser
47
51
import sys
48
52
import re
49
53
import os
50
54
import signal
51
from sets import Set
52
55
import subprocess
53
56
import atexit
54
57
import stat
55
58
import logging
56
59
import logging.handlers
57
60
import pwd
61
import contextlib
62
import struct
63
import fcntl
64
import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
58
72
59
73
import dbus
74
import dbus.service
60
75
import gobject
61
76
import avahi
62
77
from dbus.mainloop.glib import DBusGMainLoop
63
78
import ctypes
64
79
import ctypes.util
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
80
import xml.dom.minidom
81
import inspect
82
83
try:
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
except AttributeError:
86
try:
87
from IN import SO_BINDTODEVICE
88
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.6.5"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = None
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger = (logging.handlers.SysLogHandler
118
(facility =
119
logging.handlers.SysLogHandler.LOG_DAEMON,
120
address = str("/dev/log")))
121
syslogger.setFormatter(logging.Formatter
122
('Mandos [%(process)d]: %(levelname)s:'
123
' %(message)s'))
124
logger.addHandler(syslogger)
125
126
if debug:
127
console = logging.StreamHandler()
128
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
129
' [%(process)d]:'
130
' %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(console)
133
logger.setLevel(level)
134
135
136
class PGPError(Exception):
137
"""Exception if encryption/decryption fails"""
138
pass
139
140
141
class PGPEngine(object):
142
"""A simple class for OpenPGP symmetric encryption & decryption"""
143
def __init__(self):
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupgargs = ['--batch',
146
'--home', self.tempdir,
147
'--force-mdc',
148
'--quiet',
149
'--no-use-agent']
150
151
def __enter__(self):
152
return self
153
154
def __exit__(self, exc_type, exc_value, traceback):
155
self._cleanup()
156
return False
157
158
def __del__(self):
159
self._cleanup()
160
161
def _cleanup(self):
162
if self.tempdir is not None:
163
# Delete contents of tempdir
164
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
166
for filename in files:
167
os.remove(os.path.join(root, filename))
168
for dirname in dirs:
169
os.rmdir(os.path.join(root, dirname))
170
# Remove tempdir
171
os.rmdir(self.tempdir)
172
self.tempdir = None
173
174
def password_encode(self, password):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
encoded = b"mandos" + binascii.hexlify(password)
178
if len(encoded) > 2048:
179
# GnuPG can't handle long passwords, so encode differently
180
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
.replace(b"\n", b"\\n")
182
.replace(b"\0", b"\\x00"))
183
return encoded
184
185
def encrypt(self, data, password):
186
passphrase = self.password_encode(password)
187
with tempfile.NamedTemporaryFile(dir=self.tempdir
188
) as passfile:
189
passfile.write(passphrase)
190
passfile.flush()
191
proc = subprocess.Popen(['gpg', '--symmetric',
192
'--passphrase-file',
193
passfile.name]
194
+ self.gnupgargs,
195
stdin = subprocess.PIPE,
196
stdout = subprocess.PIPE,
197
stderr = subprocess.PIPE)
198
ciphertext, err = proc.communicate(input = data)
199
if proc.returncode != 0:
200
raise PGPError(err)
201
return ciphertext
202
203
def decrypt(self, data, password):
204
passphrase = self.password_encode(password)
205
with tempfile.NamedTemporaryFile(dir = self.tempdir
206
) as passfile:
207
passfile.write(passphrase)
208
passfile.flush()
209
proc = subprocess.Popen(['gpg', '--decrypt',
210
'--passphrase-file',
211
passfile.name]
212
+ self.gnupgargs,
213
stdin = subprocess.PIPE,
214
stdout = subprocess.PIPE,
215
stderr = subprocess.PIPE)
216
decrypted_plaintext, err = proc.communicate(input
217
= data)
218
if proc.returncode != 0:
219
raise PGPError(err)
220
return decrypted_plaintext
221
80
222
81
223
class AvahiError(Exception):
82
def __init__(self, value):
224
def __init__(self, value, *args, **kwargs):
83
225
self.value = value
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
226
super(AvahiError, self).__init__(value, *args, **kwargs)
227
def __unicode__(self):
228
return unicode(repr(self.value))
87
229
88
230
class AvahiServiceError(AvahiError):
89
231
pass
94
236
95
237
class AvahiService(object):
96
238
"""An Avahi (Zeroconf) service.
239
97
240
Attributes:
98
241
interface: integer; avahi.IF_UNSPEC or an interface index.
99
242
Used to optionally bind to the specified interface.
100
243
name: string; Example: 'Mandos'
101
244
type: string; Example: '_mandos._tcp'.
102
See <http://www.dns-sd.org/ServiceTypes.html>
245
See <https://www.iana.org/assignments/service-names-port-numbers>
103
246
port: integer; what port to announce
104
247
TXT: list of strings; TXT record for the service
105
248
domain: string; Domain to publish on, default to .local if empty.
107
250
max_renames: integer; maximum number of renames
108
251
rename_count: integer; counter so we only rename after collisions
109
252
a sensible number of times
253
group: D-Bus Entry Group
254
server: D-Bus Server
255
bus: dbus.SystemBus()
110
256
"""
257
111
258
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
259
servicetype = None, port = None, TXT = None,
260
domain = "", host = "", max_renames = 32768,
261
protocol = avahi.PROTO_UNSPEC, bus = None):
114
262
self.interface = interface
115
263
self.name = name
116
264
self.type = servicetype
117
265
self.port = port
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
266
self.TXT = TXT if TXT is not None else []
122
267
self.domain = domain
123
268
self.host = host
124
269
self.rename_count = 0
125
270
self.max_renames = max_renames
271
self.protocol = protocol
272
self.group = None # our entry group
273
self.server = None
274
self.bus = bus
275
self.entry_group_state_changed_match = None
276
126
277
def rename(self):
127
278
"""Derived from the Avahi example code"""
128
279
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
280
logger.critical("No suitable Zeroconf service name found"
281
" after %i retries, exiting.",
131
282
self.rename_count)
132
283
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
284
self.name = unicode(self.server
285
.GetAlternativeServiceName(self.name))
286
logger.info("Changing Zeroconf service name to %r ...",
287
self.name)
139
288
self.remove()
140
self.add()
289
try:
290
self.add()
291
except dbus.exceptions.DBusException as error:
292
logger.critical("D-Bus Exception", exc_info=error)
293
self.cleanup()
294
os._exit(1)
141
295
self.rename_count += 1
296
142
297
def remove(self):
143
298
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
299
if self.entry_group_state_changed_match is not None:
300
self.entry_group_state_changed_match.remove()
301
self.entry_group_state_changed_match = None
302
if self.group is not None:
303
self.group.Reset()
304
146
305
def add(self):
147
306
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
307
self.remove()
308
if self.group is None:
309
self.group = dbus.Interface(
310
self.bus.get_object(avahi.DBUS_NAME,
311
self.server.EntryGroupNew()),
312
avahi.DBUS_INTERFACE_ENTRY_GROUP)
313
self.entry_group_state_changed_match = (
314
self.group.connect_to_signal(
315
'StateChanged', self.entry_group_state_changed))
316
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
317
self.name, self.type)
318
self.group.AddService(
319
self.interface,
320
self.protocol,
321
dbus.UInt32(0), # flags
322
self.name, self.type,
323
self.domain, self.host,
324
dbus.UInt16(self.port),
325
avahi.string_array_to_txt_array(self.TXT))
326
self.group.Commit()
327
328
def entry_group_state_changed(self, state, error):
329
"""Derived from the Avahi example code"""
330
logger.debug("Avahi entry group state change: %i", state)
331
332
if state == avahi.ENTRY_GROUP_ESTABLISHED:
333
logger.debug("Zeroconf service established.")
334
elif state == avahi.ENTRY_GROUP_COLLISION:
335
logger.info("Zeroconf service name collision.")
336
self.rename()
337
elif state == avahi.ENTRY_GROUP_FAILURE:
338
logger.critical("Avahi: Error in group state changed %s",
339
unicode(error))
340
raise AvahiGroupError("State changed: {0!s}"
341
.format(error))
342
343
def cleanup(self):
344
"""Derived from the Avahi example code"""
345
if self.group is not None:
346
try:
347
self.group.Free()
348
except (dbus.exceptions.UnknownMethodException,
349
dbus.exceptions.DBusException):
350
pass
351
self.group = None
352
self.remove()
353
354
def server_state_changed(self, state, error=None):
355
"""Derived from the Avahi example code"""
356
logger.debug("Avahi server state change: %i", state)
357
bad_states = { avahi.SERVER_INVALID:
358
"Zeroconf server invalid",
359
avahi.SERVER_REGISTERING: None,
360
avahi.SERVER_COLLISION:
361
"Zeroconf server name collision",
362
avahi.SERVER_FAILURE:
363
"Zeroconf server failure" }
364
if state in bad_states:
365
if bad_states[state] is not None:
366
if error is None:
367
logger.error(bad_states[state])
368
else:
369
logger.error(bad_states[state] + ": %r", error)
370
self.cleanup()
371
elif state == avahi.SERVER_RUNNING:
372
self.add()
373
else:
374
if error is None:
375
logger.debug("Unknown state: %r", state)
376
else:
377
logger.debug("Unknown state: %r: %r", state, error)
378
379
def activate(self):
380
"""Derived from the Avahi example code"""
381
if self.server is None:
382
self.server = dbus.Interface(
383
self.bus.get_object(avahi.DBUS_NAME,
384
avahi.DBUS_PATH_SERVER,
385
follow_name_owner_changes=True),
386
avahi.DBUS_INTERFACE_SERVER)
387
self.server.connect_to_signal("StateChanged",
388
self.server_state_changed)
389
self.server_state_changed(self.server.GetState())
390
391
392
class AvahiServiceToSyslog(AvahiService):
393
def rename(self):
394
"""Add the new name to the syslog messages"""
395
ret = AvahiService.rename(self)
396
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
399
.format(self.name)))
400
return ret
401
402
403
def timedelta_to_milliseconds(td):
404
"Convert a datetime.timedelta() to milliseconds"
405
return ((td.days * 24 * 60 * 60 * 1000)
406
+ (td.seconds * 1000)
407
+ (td.microseconds // 1000))
171
408
172
409
173
410
class Client(object):
174
411
"""A representation of a client host served by this server.
412
175
413
Attributes:
176
name: string; from the config file, used in log messages
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
417
checker: subprocess.Popen(); a running checker process used
418
to see if the client lives.
419
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
423
runtime with vars(self) as dict, so that for
424
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
431
enabled: bool()
177
432
fingerprint: string (40 or 32 hexadecimal digits); used to
178
433
uniquely identify the client
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
190
checker_initiator_tag: a gobject event source tag, or None
191
stop_initiator_tag: - '' -
192
checker_callback_tag: - '' -
193
checker_command: string; External command which is run to check if
194
client lives. %() expansions are done at
195
runtime with vars(self) as dict, so that for
196
instance %(name)s can be used in the command.
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
443
D-Bus identifiers
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
202
452
"""
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
227
"""Note: the 'checker' key in 'config' sets the
228
'checker_command' attribute and *not* the 'checker'
229
attribute."""
230
if config is None:
231
config = {}
453
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
470
def timeout_milliseconds(self):
471
"Return the 'timeout' attribute in milliseconds"
472
return timedelta_to_milliseconds(self.timeout)
473
474
def extended_timeout_milliseconds(self):
475
"Return the 'extended_timeout' attribute in milliseconds"
476
return timedelta_to_milliseconds(self.extended_timeout)
477
478
def interval_milliseconds(self):
479
"Return the 'interval' attribute in milliseconds"
480
return timedelta_to_milliseconds(self.interval)
481
482
def approval_delay_milliseconds(self):
483
return timedelta_to_milliseconds(self.approval_delay)
484
485
@staticmethod
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
492
"""
493
settings = {}
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
497
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
503
"enabled")
504
505
client["fingerprint"] = (section["fingerprint"].upper()
506
.replace(" ", ""))
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
512
"rb") as secfile:
513
client["secret"] = secfile.read()
514
else:
515
raise TypeError("No secret or secfile for section {0}"
516
.format(section))
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
529
530
return settings
531
532
def __init__(self, settings, name = None, server_settings=None):
232
533
self.name = name
233
logger.debug(u"Creating client %r", self.name)
534
if server_settings is None:
535
server_settings = {}
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
540
541
if self.enabled:
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
546
+ self.timeout)
547
else:
548
self.last_enabled = None
549
self.expires = None
550
551
logger.debug("Creating client %r", self.name)
234
552
# Uppercase and remove spaces from fingerprint for later
235
553
# comparison purposes with return value from the fingerprint()
236
554
# function
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(config["secfile"])
244
self.secret = secfile.read()
245
secfile.close()
246
else:
247
raise TypeError(u"No secret or secfile for client %s"
248
% self.name)
249
self.host = config.get("host", "")
250
self.created = datetime.datetime.now()
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.stop_hook = stop_hook
555
logger.debug(" Fingerprint: %s", self.fingerprint)
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
558
559
# attributes specific for this server instance
255
560
self.checker = None
256
561
self.checker_initiator_tag = None
257
self.stop_initiator_tag = None
562
self.disable_initiator_tag = None
258
563
self.checker_callback_tag = None
259
self.check_command = config["checker"]
260
def start(self):
564
self.current_checker_command = None
565
self.approved = None
566
self.approvals_pending = 0
567
self.changedstate = (multiprocessing_manager
568
.Condition(multiprocessing_manager
569
.Lock()))
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
573
self.client_structure.append("client_structure")
574
575
for name, t in inspect.getmembers(type(self),
576
lambda obj:
577
isinstance(obj,
578
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()
586
587
def enable(self):
261
588
"""Start this client's checker and timeout hooks"""
589
if getattr(self, "enabled", False):
590
# Already enabled
591
return
592
self.expires = datetime.datetime.utcnow() + self.timeout
593
self.enabled = True
594
self.last_enabled = datetime.datetime.utcnow()
595
self.init_checker()
596
self.send_changedstate()
597
598
def disable(self, quiet=True):
599
"""Disable this client."""
600
if not getattr(self, "enabled", False):
601
return False
602
if not quiet:
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
605
gobject.source_remove(self.disable_initiator_tag)
606
self.disable_initiator_tag = None
607
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
609
gobject.source_remove(self.checker_initiator_tag)
610
self.checker_initiator_tag = None
611
self.stop_checker()
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
615
# Do not run this again if called by a gobject.timeout_add
616
return False
617
618
def __del__(self):
619
self.disable()
620
621
def init_checker(self):
262
622
# Schedule a new checker to be started an 'interval' from now,
263
623
# and every interval from then on.
264
self.checker_initiator_tag = gobject.timeout_add\
265
(self._interval_milliseconds,
266
self.start_checker)
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
(self.interval_milliseconds(),
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
(self.timeout_milliseconds(),
634
self.disable))
267
635
# Also start a new checker *right now*.
268
636
self.start_checker()
269
# Schedule a stop() when 'timeout' has passed
270
self.stop_initiator_tag = gobject.timeout_add\
271
(self._timeout_milliseconds,
272
self.stop)
273
def stop(self):
274
"""Stop this client.
275
The possibility that a client might be restarted is left open,
276
but not currently used."""
277
# If this client doesn't have a secret, it is already stopped.
278
if hasattr(self, "secret") and self.secret:
279
logger.info(u"Stopping client %s", self.name)
280
self.secret = None
281
else:
282
return False
283
if getattr(self, "stop_initiator_tag", False):
284
gobject.source_remove(self.stop_initiator_tag)
285
self.stop_initiator_tag = None
286
if getattr(self, "checker_initiator_tag", False):
287
gobject.source_remove(self.checker_initiator_tag)
288
self.checker_initiator_tag = None
289
self.stop_checker()
290
if self.stop_hook:
291
self.stop_hook(self)
292
# Do not run this again if called by a gobject.timeout_add
293
return False
294
def __del__(self):
295
self.stop_hook = None
296
self.stop()
297
def checker_callback(self, pid, condition):
637
638
def checker_callback(self, pid, condition, command):
298
639
"""The checker has completed, so take appropriate actions."""
299
now = datetime.datetime.now()
300
640
self.checker_callback_tag = None
301
641
self.checker = None
302
if os.WIFEXITED(condition) \
303
and (os.WEXITSTATUS(condition) == 0):
304
logger.info(u"Checker for %(name)s succeeded",
305
vars(self))
306
self.last_checked_ok = now
307
gobject.source_remove(self.stop_initiator_tag)
308
self.stop_initiator_tag = gobject.timeout_add\
309
(self._timeout_milliseconds,
310
self.stop)
311
elif not os.WIFEXITED(condition):
312
logger.warning(u"Checker for %(name)s crashed?",
642
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
645
logger.info("Checker for %(name)s succeeded",
646
vars(self))
647
self.checked_ok()
648
else:
649
logger.info("Checker for %(name)s failed",
650
vars(self))
651
else:
652
self.last_checker_status = -1
653
logger.warning("Checker for %(name)s crashed?",
313
654
vars(self))
314
else:
315
logger.info(u"Checker for %(name)s failed",
316
vars(self))
655
656
def checked_ok(self):
657
"""Assert that the client has been seen, alive and well."""
658
self.last_checked_ok = datetime.datetime.utcnow()
659
self.last_checker_status = 0
660
self.bump_timeout()
661
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
664
if timeout is None:
665
timeout = self.timeout
666
if self.disable_initiator_tag is not None:
667
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
669
if getattr(self, "enabled", False):
670
self.disable_initiator_tag = (gobject.timeout_add
671
(timedelta_to_milliseconds
672
(timeout), self.disable))
673
self.expires = datetime.datetime.utcnow() + timeout
674
675
def need_approval(self):
676
self.last_approval_request = datetime.datetime.utcnow()
677
317
678
def start_checker(self):
318
679
"""Start a new checker subprocess if one is not running.
680
319
681
If a checker already exists, leave it running and do
320
682
nothing."""
321
683
# The reason for not killing a running checker is that if we
322
# did that, then if a checker (for some reason) started
323
# running slowly and taking more than 'interval' time, the
324
# client would inevitably timeout, since no checker would get
325
# a chance to run to completion. If we instead leave running
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
326
688
# checkers alone, the checker would have to take more time
327
# than 'timeout' for the client to be declared invalid, which
328
# is as it should be.
689
# than 'timeout' for the client to be disabled, which is as it
690
# should be.
691
692
# If a checker exists, make sure it is not a zombie
693
try:
694
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
except AttributeError:
696
pass
697
except OSError as error:
698
if error.errno != errno.ECHILD:
699
raise
700
else:
701
if pid:
702
logger.warning("Checker was a zombie")
703
gobject.source_remove(self.checker_callback_tag)
704
self.checker_callback(pid, status,
705
self.current_checker_command)
706
# Start a new checker if needed
329
707
if self.checker is None:
330
try:
331
# In case check_command has exactly one % operator
332
command = self.check_command % self.host
333
except TypeError:
334
# Escape attributes for the shell
335
escaped_attrs = dict((key, re.escape(str(val)))
336
for key, val in
337
vars(self).iteritems())
338
try:
339
command = self.check_command % escaped_attrs
340
except TypeError, error:
341
logger.error(u'Could not format string "%s":'
342
u' %s', self.check_command, error)
343
return True # Try again later
344
try:
345
logger.info(u"Starting checker %r for %s",
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
711
for attr in
712
self.runtime_expansions)
713
try:
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
719
self.current_checker_command = command
720
try:
721
logger.info("Starting checker %r for %s",
346
722
command, self.name)
347
723
# We don't need to redirect stdout and stderr, since
348
724
# in normal mode, that is already done by daemon(),
349
725
# and in debug mode we don't want to. (Stdin is
350
726
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
729
# created wnull.
730
popen_args = {}
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
734
"stderr": wnull })
351
735
self.checker = subprocess.Popen(command,
352
736
close_fds=True,
353
shell=True, cwd="/")
354
self.checker_callback_tag = gobject.child_watch_add\
355
(self.checker.pid,
356
self.checker_callback)
357
except OSError, error:
358
logger.error(u"Failed to start subprocess: %s",
359
error)
737
shell=True, cwd="/",
738
**popen_args)
739
except OSError as error:
740
logger.error("Failed to start subprocess",
741
exc_info=error)
742
return True
743
self.checker_callback_tag = (gobject.child_watch_add
744
(self.checker.pid,
745
self.checker_callback,
746
data=command))
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
749
try:
750
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
751
except OSError as error:
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
755
exc_info=error)
756
return True
757
raise
758
if pid:
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
360
761
# Re-run this periodically if run by gobject.timeout_add
361
762
return True
763
362
764
def stop_checker(self):
363
765
"""Force the checker process, if any, to stop."""
364
766
if self.checker_callback_tag:
366
768
self.checker_callback_tag = None
367
769
if getattr(self, "checker", None) is None:
368
770
return
369
logger.debug(u"Stopping checker for %(name)s", vars(self))
771
logger.debug("Stopping checker for %(name)s", vars(self))
370
772
try:
371
os.kill(self.checker.pid, signal.SIGTERM)
372
#os.sleep(0.5)
773
self.checker.terminate()
774
#time.sleep(0.5)
373
775
#if self.checker.poll() is None:
374
# os.kill(self.checker.pid, signal.SIGKILL)
375
except OSError, error:
776
# self.checker.kill()
777
except OSError as error:
376
778
if error.errno != errno.ESRCH: # No such process
377
779
raise
378
780
self.checker = None
379
def still_valid(self):
380
"""Has the timeout not yet passed for this client?"""
381
now = datetime.datetime.now()
382
if self.last_checked_ok is None:
383
return now < (self.created + self.timeout)
384
else:
385
return now < (self.last_checked_ok + self.timeout)
386
387
388
def peer_certificate(session):
389
"Return the peer's OpenPGP certificate as a bytestring"
390
# If not an OpenPGP certificate...
391
if gnutls.library.functions.gnutls_certificate_type_get\
392
(session._c_object) \
393
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
394
# ...do the normal thing
395
return session.peer_certificate
396
list_size = ctypes.c_uint()
397
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
398
(session._c_object, ctypes.byref(list_size))
399
if list_size.value == 0:
400
return None
401
cert = cert_list[0]
402
return ctypes.string_at(cert.data, cert.size)
403
404
405
def fingerprint(openpgp):
406
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
407
# New GnuTLS "datum" with the OpenPGP public key
408
datum = gnutls.library.types.gnutls_datum_t\
409
(ctypes.cast(ctypes.c_char_p(openpgp),
410
ctypes.POINTER(ctypes.c_ubyte)),
411
ctypes.c_uint(len(openpgp)))
412
# New empty GnuTLS certificate
413
crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
gnutls.library.functions.gnutls_openpgp_crt_init\
415
(ctypes.byref(crt))
416
# Import the OpenPGP public key into the certificate
417
gnutls.library.functions.gnutls_openpgp_crt_import\
418
(crt, ctypes.byref(datum),
419
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
# Verify the self signature in the key
421
crtverify = ctypes.c_uint()
422
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
(crt, 0, ctypes.byref(crtverify))
424
if crtverify.value != 0:
425
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
raise gnutls.errors.CertificateSecurityError("Verify failed")
427
# New buffer for the fingerprint
428
buf = ctypes.create_string_buffer(20)
429
buf_len = ctypes.c_size_t()
430
# Get the fingerprint from the certificate into the buffer
431
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
432
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
433
# Deinit the certificate
434
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
435
# Convert the buffer to a Python bytestring
436
fpr = ctypes.string_at(buf, buf_len.value)
437
# Convert the bytestring to hexadecimal notation
438
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
439
return hex_fpr
440
441
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
443
"""A TCP request handler class.
444
Instantiated by IPv6_TCPServer for each request to handle it.
781
782
783
def dbus_service_property(dbus_interface, signature="v",
784
access="readwrite", byte_arrays=False):
785
"""Decorators for marking methods of a DBusObjectWithProperties to
786
become properties on the D-Bus.
787
788
The decorated method will be called with no arguments by "Get"
789
and with one argument by "Set".
790
791
The parameters, where they are supported, are the same as
792
dbus.service.method, except there is only "signature", since the
793
type from Get() and the type sent to Set() is the same.
794
"""
795
# Encoding deeply encoded byte arrays is not supported yet by the
796
# "Set" method, so we fail early here:
797
if byte_arrays and signature != "ay":
798
raise ValueError("Byte arrays not supported for non-'ay'"
799
" signature {0!r}".format(signature))
800
def decorator(func):
801
func._dbus_is_property = True
802
func._dbus_interface = dbus_interface
803
func._dbus_signature = signature
804
func._dbus_access = access
805
func._dbus_name = func.__name__
806
if func._dbus_name.endswith("_dbus_property"):
807
func._dbus_name = func._dbus_name[:-14]
808
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
return func
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
def decorator(func):
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
828
return func
829
return decorator
830
831
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
834
Usage:
835
836
@dbus_service_property("org.example.Interface", signature="b",
837
access="r")
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
843
"""
844
def decorator(func):
845
func._dbus_annotations = annotations
846
return func
847
return decorator
848
849
850
class DBusPropertyException(dbus.exceptions.DBusException):
851
"""A base class for D-Bus property-related exceptions
852
"""
853
def __unicode__(self):
854
return unicode(str(self))
855
856
857
class DBusPropertyAccessException(DBusPropertyException):
858
"""A property's access permissions disallows an operation.
859
"""
860
pass
861
862
863
class DBusPropertyNotFound(DBusPropertyException):
864
"""An attempt was made to access a non-existing property.
865
"""
866
pass
867
868
869
class DBusObjectWithProperties(dbus.service.Object):
870
"""A D-Bus object with properties.
871
872
Classes inheriting from this can use the dbus_service_property
873
decorator to expose methods as D-Bus properties. It exposes the
874
standard Get(), Set(), and GetAll() methods on the D-Bus.
875
"""
876
877
@staticmethod
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
880
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
883
"""
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
False)
886
887
def _get_all_dbus_things(self, thing):
888
"""Returns a generator of (name, attribute) pairs
889
"""
890
return ((getattr(athing.__get__(self), "_dbus_name",
891
name),
892
athing.__get__(self))
893
for cls in self.__class__.__mro__
894
for name, athing in
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
897
898
def _get_dbus_property(self, interface_name, property_name):
899
"""Returns a bound method if one exists which is a D-Bus
900
property with the specified name and interface.
901
"""
902
for cls in self.__class__.__mro__:
903
for name, value in (inspect.getmembers
904
(cls,
905
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(self.dbus_object_path + ":"
912
+ interface_name + "."
913
+ property_name)
914
915
@dbus.service.method(dbus.PROPERTIES_IFACE, 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 {0!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, in_signature="s",
947
out_signature="a{sv}")
948
def GetAll(self, interface_name):
949
"""Standard D-Bus property GetAll() method, see D-Bus
950
standard.
951
952
Note: Will not include properties with access="write".
953
"""
954
properties = {}
955
for name, prop in self._get_all_dbus_things("property"):
956
if (interface_name
957
and interface_name != prop._dbus_interface):
958
# Interface non-empty but did not match
959
continue
960
# Ignore write-only properties
961
if prop._dbus_access == "write":
962
continue
963
value = prop()
964
if not hasattr(value, "variant_level"):
965
properties[name] = value
966
continue
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
return dbus.Dictionary(properties, signature="sv")
970
971
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
out_signature="s",
973
path_keyword='object_path',
974
connection_keyword='connection')
975
def Introspect(self, object_path, connection):
976
"""Overloading of standard D-Bus method.
977
978
Inserts property tags and interface annotation tags.
979
"""
980
xmlstring = dbus.service.Object.Introspect(self, object_path,
981
connection)
982
try:
983
document = xml.dom.minidom.parseString(xmlstring)
984
def make_tag(document, name, prop):
985
e = document.createElement("property")
986
e.setAttribute("name", name)
987
e.setAttribute("type", prop._dbus_signature)
988
e.setAttribute("access", prop._dbus_access)
989
return e
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
992
for tag in (make_tag(document, name, prop)
993
for name, prop
994
in self._get_all_dbus_things("property")
995
if prop._dbus_interface
996
== if_tag.getAttribute("name")):
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1008
(prop,
1009
"_dbus_annotations",
1010
{}))
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1013
"annotation")
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1024
)).iteritems():
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
1029
# Add the names to the return values for the
1030
# "org.freedesktop.DBus.Properties" methods
1031
if (if_tag.getAttribute("name")
1032
== "org.freedesktop.DBus.Properties"):
1033
for cn in if_tag.getElementsByTagName("method"):
1034
if cn.getAttribute("name") == "Get":
1035
for arg in cn.getElementsByTagName("arg"):
1036
if (arg.getAttribute("direction")
1037
== "out"):
1038
arg.setAttribute("name", "value")
1039
elif cn.getAttribute("name") == "GetAll":
1040
for arg in cn.getElementsByTagName("arg"):
1041
if (arg.getAttribute("direction")
1042
== "out"):
1043
arg.setAttribute("name", "props")
1044
xmlstring = document.toxml("utf-8")
1045
document.unlink()
1046
except (AttributeError, xml.dom.DOMException,
1047
xml.parsers.expat.ExpatError) as error:
1048
logger.error("Failed to override Introspection method",
1049
exc_info=error)
1050
return xmlstring
1051
1052
1053
def datetime_to_dbus(dt, variant_level=0):
1054
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1055
if dt is None:
1056
return dbus.String("", variant_level = variant_level)
1057
return dbus.String(dt.isoformat(),
1058
variant_level=variant_level)
1059
1060
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1065
Usage:
1066
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1072
pass
1073
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1079
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
1083
"""
1084
def wrapper(cls):
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1087
attr = {}
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
1091
# Ignore non-D-Bus attributes, and D-Bus attributes
1092
# with the wrong interface name
1093
if (not hasattr(attribute, "_dbus_interface")
1094
or not attribute._dbus_interface
1095
.startswith(orig_interface_name)):
1096
continue
1097
# Create an alternate D-Bus interface name based on
1098
# the current name
1099
alt_interface = (attribute._dbus_interface
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
1103
# Is this a D-Bus signal?
1104
if getattr(attribute, "_dbus_is_signal", False):
1105
# Extract the original non-method undecorated
1106
# function by black magic
1107
nonmethod_func = (dict(
1108
zip(attribute.func_code.co_freevars,
1109
attribute.__closure__))["func"]
1110
.cell_contents)
1111
# Create a new, but exactly alike, function
1112
# object, and decorate it to be a new D-Bus signal
1113
# with the alternate D-Bus interface name
1114
new_function = (dbus.service.signal
1115
(alt_interface,
1116
attribute._dbus_signature)
1117
(types.FunctionType(
1118
nonmethod_func.func_code,
1119
nonmethod_func.func_globals,
1120
nonmethod_func.func_name,
1121
nonmethod_func.func_defaults,
1122
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1124
try:
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1128
pass
1129
# Define a creator of a function to call both the
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
1133
def fixscope(func1, func2):
1134
"""This function is a scope container to pass
1135
func1 and func2 to the "call_both" function
1136
outside of its arguments"""
1137
def call_both(*args, **kwargs):
1138
"""This function will emit two D-Bus
1139
signals by calling func1 and func2"""
1140
func1(*args, **kwargs)
1141
func2(*args, **kwargs)
1142
return call_both
1143
# Create the "call_both" function and add it to
1144
# the class
1145
attr[attrname] = fixscope(attribute, new_function)
1146
# Is this a D-Bus method?
1147
elif getattr(attribute, "_dbus_is_method", False):
1148
# Create a new, but exactly alike, function
1149
# object. Decorate it to be a new D-Bus method
1150
# with the alternate D-Bus interface name. Add it
1151
# to the class.
1152
attr[attrname] = (dbus.service.method
1153
(alt_interface,
1154
attribute._dbus_in_signature,
1155
attribute._dbus_out_signature)
1156
(types.FunctionType
1157
(attribute.func_code,
1158
attribute.func_globals,
1159
attribute.func_name,
1160
attribute.func_defaults,
1161
attribute.func_closure)))
1162
# Copy annotations, if any
1163
try:
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1167
pass
1168
# Is this a D-Bus property?
1169
elif getattr(attribute, "_dbus_is_property", False):
1170
# Create a new, but exactly alike, function
1171
# object, and decorate it to be a new D-Bus
1172
# property with the alternate D-Bus interface
1173
# name. Add it to the class.
1174
attr[attrname] = (dbus_service_property
1175
(alt_interface,
1176
attribute._dbus_signature,
1177
attribute._dbus_access,
1178
attribute
1179
._dbus_get_args_options
1180
["byte_arrays"])
1181
(types.FunctionType
1182
(attribute.func_code,
1183
attribute.func_globals,
1184
attribute.func_name,
1185
attribute.func_defaults,
1186
attribute.func_closure)))
1187
# Copy annotations, if any
1188
try:
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1192
pass
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1198
# to the class.
1199
attr[attrname] = (dbus_interface_annotations
1200
(alt_interface)
1201
(types.FunctionType
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1207
if deprecate:
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1212
def func(self):
1213
return { "org.freedesktop.DBus.Deprecated":
1214
"true" }
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1219
attr[aname] = func
1220
break
1221
if interface_names:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1225
(cls,), attr)
1226
return cls
1227
return wrapper
1228
1229
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
1232
class ClientDBus(Client, DBusObjectWithProperties):
1233
"""A Client class using D-Bus
1234
1235
Attributes:
1236
dbus_object_path: dbus.ObjectPath
1237
bus: dbus.SystemBus()
1238
"""
1239
1240
runtime_expansions = (Client.runtime_expansions
1241
+ ("dbus_object_path",))
1242
1243
# dbus.service.Object doesn't use super(), so we can't either.
1244
1245
def __init__(self, bus = None, *args, **kwargs):
1246
self.bus = bus
1247
Client.__init__(self, *args, **kwargs)
1248
# Only now, when this client is initialized, can it show up on
1249
# the D-Bus
1250
client_object_name = unicode(self.name).translate(
1251
{ord("."): ord("_"),
1252
ord("-"): ord("_")})
1253
self.dbus_object_path = (dbus.ObjectPath
1254
("/clients/" + client_object_name))
1255
DBusObjectWithProperties.__init__(self, self.bus,
1256
self.dbus_object_path)
1257
1258
def notifychangeproperty(transform_func,
1259
dbus_name, type_func=lambda x: x,
1260
variant_level=1):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1263
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
1267
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
1270
"""
1271
attrname = "_{0}".format(dbus_name)
1272
def setter(self, value):
1273
if hasattr(self, "dbus_object_path"):
1274
if (not hasattr(self, attrname) or
1275
type_func(getattr(self, attrname, None))
1276
!= type_func(value)):
1277
dbus_value = transform_func(type_func(value),
1278
variant_level
1279
=variant_level)
1280
self.PropertyChanged(dbus.String(dbus_name),
1281
dbus_value)
1282
setattr(self, attrname, value)
1283
1284
return property(lambda self: getattr(self, attrname), setter)
1285
1286
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
approvals_pending = notifychangeproperty(dbus.Boolean,
1288
"ApprovalPending",
1289
type_func = bool)
1290
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
last_enabled = notifychangeproperty(datetime_to_dbus,
1292
"LastEnabled")
1293
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
type_func = lambda checker:
1295
checker is not None)
1296
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
"LastCheckedOK")
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
1300
last_approval_request = notifychangeproperty(
1301
datetime_to_dbus, "LastApprovalRequest")
1302
approved_by_default = notifychangeproperty(dbus.Boolean,
1303
"ApprovedByDefault")
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1305
"ApprovalDelay",
1306
type_func =
1307
timedelta_to_milliseconds)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func =
1314
timedelta_to_milliseconds)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
timedelta_to_milliseconds)
1322
checker_command = notifychangeproperty(dbus.String, "Checker")
1323
1324
del notifychangeproperty
1325
1326
def __del__(self, *args, **kwargs):
1327
try:
1328
self.remove_from_connection()
1329
except LookupError:
1330
pass
1331
if hasattr(DBusObjectWithProperties, "__del__"):
1332
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1333
Client.__del__(self, *args, **kwargs)
1334
1335
def checker_callback(self, pid, condition, command,
1336
*args, **kwargs):
1337
self.checker_callback_tag = None
1338
self.checker = None
1339
if os.WIFEXITED(condition):
1340
exitstatus = os.WEXITSTATUS(condition)
1341
# Emit D-Bus signal
1342
self.CheckerCompleted(dbus.Int16(exitstatus),
1343
dbus.Int64(condition),
1344
dbus.String(command))
1345
else:
1346
# Emit D-Bus signal
1347
self.CheckerCompleted(dbus.Int16(-1),
1348
dbus.Int64(condition),
1349
dbus.String(command))
1350
1351
return Client.checker_callback(self, pid, condition, command,
1352
*args, **kwargs)
1353
1354
def start_checker(self, *args, **kwargs):
1355
old_checker_pid = getattr(self.checker, "pid", None)
1356
r = Client.start_checker(self, *args, **kwargs)
1357
# Only if new checker process was started
1358
if (self.checker is not None
1359
and old_checker_pid != self.checker.pid):
1360
# Emit D-Bus signal
1361
self.CheckerStarted(self.current_checker_command)
1362
return r
1363
1364
def _reset_approved(self):
1365
self.approved = None
1366
return False
1367
1368
def approve(self, value=True):
1369
self.approved = value
1370
gobject.timeout_add(timedelta_to_milliseconds
1371
(self.approval_duration),
1372
self._reset_approved)
1373
self.send_changedstate()
1374
1375
## D-Bus methods, signals & properties
1376
_interface = "se.recompile.Mandos.Client"
1377
1378
## Interfaces
1379
1380
@dbus_interface_annotations(_interface)
1381
def _foo(self):
1382
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1383
"false"}
1384
1385
## Signals
1386
1387
# CheckerCompleted - signal
1388
@dbus.service.signal(_interface, signature="nxs")
1389
def CheckerCompleted(self, exitcode, waitstatus, command):
1390
"D-Bus signal"
1391
pass
1392
1393
# CheckerStarted - signal
1394
@dbus.service.signal(_interface, signature="s")
1395
def CheckerStarted(self, command):
1396
"D-Bus signal"
1397
pass
1398
1399
# PropertyChanged - signal
1400
@dbus.service.signal(_interface, signature="sv")
1401
def PropertyChanged(self, property, value):
1402
"D-Bus signal"
1403
pass
1404
1405
# GotSecret - signal
1406
@dbus.service.signal(_interface)
1407
def GotSecret(self):
1408
"""D-Bus signal
1409
Is sent after a successful transfer of secret from the Mandos
1410
server to mandos-client
1411
"""
1412
pass
1413
1414
# Rejected - signal
1415
@dbus.service.signal(_interface, signature="s")
1416
def Rejected(self, reason):
1417
"D-Bus signal"
1418
pass
1419
1420
# NeedApproval - signal
1421
@dbus.service.signal(_interface, signature="tb")
1422
def NeedApproval(self, timeout, default):
1423
"D-Bus signal"
1424
return self.need_approval()
1425
1426
## Methods
1427
1428
# Approve - method
1429
@dbus.service.method(_interface, in_signature="b")
1430
def Approve(self, value):
1431
self.approve(value)
1432
1433
# CheckedOK - method
1434
@dbus.service.method(_interface)
1435
def CheckedOK(self):
1436
self.checked_ok()
1437
1438
# Enable - method
1439
@dbus.service.method(_interface)
1440
def Enable(self):
1441
"D-Bus method"
1442
self.enable()
1443
1444
# StartChecker - method
1445
@dbus.service.method(_interface)
1446
def StartChecker(self):
1447
"D-Bus method"
1448
self.start_checker()
1449
1450
# Disable - method
1451
@dbus.service.method(_interface)
1452
def Disable(self):
1453
"D-Bus method"
1454
self.disable()
1455
1456
# StopChecker - method
1457
@dbus.service.method(_interface)
1458
def StopChecker(self):
1459
self.stop_checker()
1460
1461
## Properties
1462
1463
# ApprovalPending - property
1464
@dbus_service_property(_interface, signature="b", access="read")
1465
def ApprovalPending_dbus_property(self):
1466
return dbus.Boolean(bool(self.approvals_pending))
1467
1468
# ApprovedByDefault - property
1469
@dbus_service_property(_interface, signature="b",
1470
access="readwrite")
1471
def ApprovedByDefault_dbus_property(self, value=None):
1472
if value is None: # get
1473
return dbus.Boolean(self.approved_by_default)
1474
self.approved_by_default = bool(value)
1475
1476
# ApprovalDelay - property
1477
@dbus_service_property(_interface, signature="t",
1478
access="readwrite")
1479
def ApprovalDelay_dbus_property(self, value=None):
1480
if value is None: # get
1481
return dbus.UInt64(self.approval_delay_milliseconds())
1482
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1483
1484
# ApprovalDuration - property
1485
@dbus_service_property(_interface, signature="t",
1486
access="readwrite")
1487
def ApprovalDuration_dbus_property(self, value=None):
1488
if value is None: # get
1489
return dbus.UInt64(timedelta_to_milliseconds(
1490
self.approval_duration))
1491
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1492
1493
# Name - property
1494
@dbus_service_property(_interface, signature="s", access="read")
1495
def Name_dbus_property(self):
1496
return dbus.String(self.name)
1497
1498
# Fingerprint - property
1499
@dbus_service_property(_interface, signature="s", access="read")
1500
def Fingerprint_dbus_property(self):
1501
return dbus.String(self.fingerprint)
1502
1503
# Host - property
1504
@dbus_service_property(_interface, signature="s",
1505
access="readwrite")
1506
def Host_dbus_property(self, value=None):
1507
if value is None: # get
1508
return dbus.String(self.host)
1509
self.host = unicode(value)
1510
1511
# Created - property
1512
@dbus_service_property(_interface, signature="s", access="read")
1513
def Created_dbus_property(self):
1514
return datetime_to_dbus(self.created)
1515
1516
# LastEnabled - property
1517
@dbus_service_property(_interface, signature="s", access="read")
1518
def LastEnabled_dbus_property(self):
1519
return datetime_to_dbus(self.last_enabled)
1520
1521
# Enabled - property
1522
@dbus_service_property(_interface, signature="b",
1523
access="readwrite")
1524
def Enabled_dbus_property(self, value=None):
1525
if value is None: # get
1526
return dbus.Boolean(self.enabled)
1527
if value:
1528
self.enable()
1529
else:
1530
self.disable()
1531
1532
# LastCheckedOK - property
1533
@dbus_service_property(_interface, signature="s",
1534
access="readwrite")
1535
def LastCheckedOK_dbus_property(self, value=None):
1536
if value is not None:
1537
self.checked_ok()
1538
return
1539
return datetime_to_dbus(self.last_checked_ok)
1540
1541
# LastCheckerStatus - property
1542
@dbus_service_property(_interface, signature="n",
1543
access="read")
1544
def LastCheckerStatus_dbus_property(self):
1545
return dbus.Int16(self.last_checker_status)
1546
1547
# Expires - property
1548
@dbus_service_property(_interface, signature="s", access="read")
1549
def Expires_dbus_property(self):
1550
return datetime_to_dbus(self.expires)
1551
1552
# LastApprovalRequest - property
1553
@dbus_service_property(_interface, signature="s", access="read")
1554
def LastApprovalRequest_dbus_property(self):
1555
return datetime_to_dbus(self.last_approval_request)
1556
1557
# Timeout - property
1558
@dbus_service_property(_interface, signature="t",
1559
access="readwrite")
1560
def Timeout_dbus_property(self, value=None):
1561
if value is None: # get
1562
return dbus.UInt64(self.timeout_milliseconds())
1563
old_timeout = self.timeout
1564
self.timeout = datetime.timedelta(0, 0, 0, value)
1565
# Reschedule disabling
1566
if self.enabled:
1567
now = datetime.datetime.utcnow()
1568
self.expires += self.timeout - old_timeout
1569
if self.expires <= now:
1570
# The timeout has passed
1571
self.disable()
1572
else:
1573
if (getattr(self, "disable_initiator_tag", None)
1574
is None):
1575
return
1576
gobject.source_remove(self.disable_initiator_tag)
1577
self.disable_initiator_tag = (
1578
gobject.timeout_add(
1579
timedelta_to_milliseconds(self.expires - now),
1580
self.disable))
1581
1582
# ExtendedTimeout - property
1583
@dbus_service_property(_interface, signature="t",
1584
access="readwrite")
1585
def ExtendedTimeout_dbus_property(self, value=None):
1586
if value is None: # get
1587
return dbus.UInt64(self.extended_timeout_milliseconds())
1588
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1589
1590
# Interval - property
1591
@dbus_service_property(_interface, signature="t",
1592
access="readwrite")
1593
def Interval_dbus_property(self, value=None):
1594
if value is None: # get
1595
return dbus.UInt64(self.interval_milliseconds())
1596
self.interval = datetime.timedelta(0, 0, 0, value)
1597
if getattr(self, "checker_initiator_tag", None) is None:
1598
return
1599
if self.enabled:
1600
# Reschedule checker run
1601
gobject.source_remove(self.checker_initiator_tag)
1602
self.checker_initiator_tag = (gobject.timeout_add
1603
(value, self.start_checker))
1604
self.start_checker() # Start one now, too
1605
1606
# Checker - property
1607
@dbus_service_property(_interface, signature="s",
1608
access="readwrite")
1609
def Checker_dbus_property(self, value=None):
1610
if value is None: # get
1611
return dbus.String(self.checker_command)
1612
self.checker_command = unicode(value)
1613
1614
# CheckerRunning - property
1615
@dbus_service_property(_interface, signature="b",
1616
access="readwrite")
1617
def CheckerRunning_dbus_property(self, value=None):
1618
if value is None: # get
1619
return dbus.Boolean(self.checker is not None)
1620
if value:
1621
self.start_checker()
1622
else:
1623
self.stop_checker()
1624
1625
# ObjectPath - property
1626
@dbus_service_property(_interface, signature="o", access="read")
1627
def ObjectPath_dbus_property(self):
1628
return self.dbus_object_path # is already a dbus.ObjectPath
1629
1630
# Secret = property
1631
@dbus_service_property(_interface, signature="ay",
1632
access="write", byte_arrays=True)
1633
def Secret_dbus_property(self, value):
1634
self.secret = str(value)
1635
1636
del _interface
1637
1638
1639
class ProxyClient(object):
1640
def __init__(self, child_pipe, fpr, address):
1641
self._pipe = child_pipe
1642
self._pipe.send(('init', fpr, address))
1643
if not self._pipe.recv():
1644
raise KeyError()
1645
1646
def __getattribute__(self, name):
1647
if name == '_pipe':
1648
return super(ProxyClient, self).__getattribute__(name)
1649
self._pipe.send(('getattr', name))
1650
data = self._pipe.recv()
1651
if data[0] == 'data':
1652
return data[1]
1653
if data[0] == 'function':
1654
def func(*args, **kwargs):
1655
self._pipe.send(('funcall', name, args, kwargs))
1656
return self._pipe.recv()[1]
1657
return func
1658
1659
def __setattr__(self, name, value):
1660
if name == '_pipe':
1661
return super(ProxyClient, self).__setattr__(name, value)
1662
self._pipe.send(('setattr', name, value))
1663
1664
1665
class ClientHandler(socketserver.BaseRequestHandler, object):
1666
"""A class to handle client connections.
1667
1668
Instantiated once for each connection to handle it.
445
1669
Note: This will run in its own forked process."""
446
1670
447
1671
def handle(self):
448
logger.info(u"TCP connection from: %s",
449
unicode(self.client_address))
450
session = gnutls.connection.ClientSession\
451
(self.request, gnutls.connection.X509Credentials())
452
453
line = self.request.makefile().readline()
454
logger.debug(u"Protocol version: %r", line)
455
try:
456
if int(line.strip().split()[0]) > 1:
457
raise RuntimeError
458
except (ValueError, IndexError, RuntimeError), error:
459
logger.error(u"Unknown protocol version: %s", error)
460
return
461
462
# Note: gnutls.connection.X509Credentials is really a generic
463
# GnuTLS certificate credentials object so long as no X.509
464
# keys are added to it. Therefore, we can use it here despite
465
# using OpenPGP certificates.
466
467
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
468
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
469
# "+DHE-DSS"))
470
priority = "NORMAL" # Fallback default, since this
471
# MUST be set.
472
if self.server.settings["priority"]:
473
priority = self.server.settings["priority"]
474
gnutls.library.functions.gnutls_priority_set_direct\
475
(session._c_object, priority, None)
476
477
try:
478
session.handshake()
479
except gnutls.errors.GNUTLSError, error:
480
logger.warning(u"Handshake failed: %s", error)
481
# Do not run session.bye() here: the session is not
482
# established. Just abandon the request.
483
return
484
try:
485
fpr = fingerprint(peer_certificate(session))
486
except (TypeError, gnutls.errors.GNUTLSError), error:
487
logger.warning(u"Bad certificate: %s", error)
488
session.bye()
489
return
490
logger.debug(u"Fingerprint: %s", fpr)
491
client = None
492
for c in self.server.clients:
493
if c.fingerprint == fpr:
494
client = c
495
break
496
if not client:
497
logger.warning(u"Client not found for fingerprint: %s",
498
fpr)
499
session.bye()
500
return
501
# Have to check if client.still_valid(), since it is possible
502
# that the client timed out while establishing the GnuTLS
503
# session.
504
if not client.still_valid():
505
logger.warning(u"Client %(name)s is invalid",
506
vars(client))
507
session.bye()
508
return
509
sent_size = 0
510
while sent_size < len(client.secret):
511
sent = session.send(client.secret[sent_size:])
512
logger.debug(u"Sent: %d, remaining: %d",
513
sent, len(client.secret)
514
- (sent_size + sent))
515
sent_size += sent
516
session.bye()
517
518
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
520
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1672
with contextlib.closing(self.server.child_pipe) as child_pipe:
1673
logger.info("TCP connection from: %s",
1674
unicode(self.client_address))
1675
logger.debug("Pipe FD: %d",
1676
self.server.child_pipe.fileno())
1677
1678
session = (gnutls.connection
1679
.ClientSession(self.request,
1680
gnutls.connection
1681
.X509Credentials()))
1682
1683
# Note: gnutls.connection.X509Credentials is really a
1684
# generic GnuTLS certificate credentials object so long as
1685
# no X.509 keys are added to it. Therefore, we can use it
1686
# here despite using OpenPGP certificates.
1687
1688
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1689
# "+AES-256-CBC", "+SHA1",
1690
# "+COMP-NULL", "+CTYPE-OPENPGP",
1691
# "+DHE-DSS"))
1692
# Use a fallback default, since this MUST be set.
1693
priority = self.server.gnutls_priority
1694
if priority is None:
1695
priority = "NORMAL"
1696
(gnutls.library.functions
1697
.gnutls_priority_set_direct(session._c_object,
1698
priority, None))
1699
1700
# Start communication using the Mandos protocol
1701
# Get protocol number
1702
line = self.request.makefile().readline()
1703
logger.debug("Protocol version: %r", line)
1704
try:
1705
if int(line.strip().split()[0]) > 1:
1706
raise RuntimeError(line)
1707
except (ValueError, IndexError, RuntimeError) as error:
1708
logger.error("Unknown protocol version: %s", error)
1709
return
1710
1711
# Start GnuTLS connection
1712
try:
1713
session.handshake()
1714
except gnutls.errors.GNUTLSError as error:
1715
logger.warning("Handshake failed: %s", error)
1716
# Do not run session.bye() here: the session is not
1717
# established. Just abandon the request.
1718
return
1719
logger.debug("Handshake succeeded")
1720
1721
approval_required = False
1722
try:
1723
try:
1724
fpr = self.fingerprint(self.peer_certificate
1725
(session))
1726
except (TypeError,
1727
gnutls.errors.GNUTLSError) as error:
1728
logger.warning("Bad certificate: %s", error)
1729
return
1730
logger.debug("Fingerprint: %s", fpr)
1731
1732
try:
1733
client = ProxyClient(child_pipe, fpr,
1734
self.client_address)
1735
except KeyError:
1736
return
1737
1738
if client.approval_delay:
1739
delay = client.approval_delay
1740
client.approvals_pending += 1
1741
approval_required = True
1742
1743
while True:
1744
if not client.enabled:
1745
logger.info("Client %s is disabled",
1746
client.name)
1747
if self.server.use_dbus:
1748
# Emit D-Bus signal
1749
client.Rejected("Disabled")
1750
return
1751
1752
if client.approved or not client.approval_delay:
1753
#We are approved or approval is disabled
1754
break
1755
elif client.approved is None:
1756
logger.info("Client %s needs approval",
1757
client.name)
1758
if self.server.use_dbus:
1759
# Emit D-Bus signal
1760
client.NeedApproval(
1761
client.approval_delay_milliseconds(),
1762
client.approved_by_default)
1763
else:
1764
logger.warning("Client %s was not approved",
1765
client.name)
1766
if self.server.use_dbus:
1767
# Emit D-Bus signal
1768
client.Rejected("Denied")
1769
return
1770
1771
#wait until timeout or approved
1772
time = datetime.datetime.now()
1773
client.changedstate.acquire()
1774
client.changedstate.wait(
1775
float(timedelta_to_milliseconds(delay)
1776
/ 1000))
1777
client.changedstate.release()
1778
time2 = datetime.datetime.now()
1779
if (time2 - time) >= delay:
1780
if not client.approved_by_default:
1781
logger.warning("Client %s timed out while"
1782
" waiting for approval",
1783
client.name)
1784
if self.server.use_dbus:
1785
# Emit D-Bus signal
1786
client.Rejected("Approval timed out")
1787
return
1788
else:
1789
break
1790
else:
1791
delay -= time2 - time
1792
1793
sent_size = 0
1794
while sent_size < len(client.secret):
1795
try:
1796
sent = session.send(client.secret[sent_size:])
1797
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("gnutls send failed",
1799
exc_info=error)
1800
return
1801
logger.debug("Sent: %d, remaining: %d",
1802
sent, len(client.secret)
1803
- (sent_size + sent))
1804
sent_size += sent
1805
1806
logger.info("Sending secret to %s", client.name)
1807
# bump the timeout using extended_timeout
1808
client.bump_timeout(client.extended_timeout)
1809
if self.server.use_dbus:
1810
# Emit D-Bus signal
1811
client.GotSecret()
1812
1813
finally:
1814
if approval_required:
1815
client.approvals_pending -= 1
1816
try:
1817
session.bye()
1818
except gnutls.errors.GNUTLSError as error:
1819
logger.warning("GnuTLS bye failed",
1820
exc_info=error)
1821
1822
@staticmethod
1823
def peer_certificate(session):
1824
"Return the peer's OpenPGP certificate as a bytestring"
1825
# If not an OpenPGP certificate...
1826
if (gnutls.library.functions
1827
.gnutls_certificate_type_get(session._c_object)
1828
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1829
# ...do the normal thing
1830
return session.peer_certificate
1831
list_size = ctypes.c_uint(1)
1832
cert_list = (gnutls.library.functions
1833
.gnutls_certificate_get_peers
1834
(session._c_object, ctypes.byref(list_size)))
1835
if not bool(cert_list) and list_size.value != 0:
1836
raise gnutls.errors.GNUTLSError("error getting peer"
1837
" certificate")
1838
if list_size.value == 0:
1839
return None
1840
cert = cert_list[0]
1841
return ctypes.string_at(cert.data, cert.size)
1842
1843
@staticmethod
1844
def fingerprint(openpgp):
1845
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1846
# New GnuTLS "datum" with the OpenPGP public key
1847
datum = (gnutls.library.types
1848
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1849
ctypes.POINTER
1850
(ctypes.c_ubyte)),
1851
ctypes.c_uint(len(openpgp))))
1852
# New empty GnuTLS certificate
1853
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1856
# Import the OpenPGP public key into the certificate
1857
(gnutls.library.functions
1858
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1859
gnutls.library.constants
1860
.GNUTLS_OPENPGP_FMT_RAW))
1861
# Verify the self signature in the key
1862
crtverify = ctypes.c_uint()
1863
(gnutls.library.functions
1864
.gnutls_openpgp_crt_verify_self(crt, 0,
1865
ctypes.byref(crtverify)))
1866
if crtverify.value != 0:
1867
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1868
raise (gnutls.errors.CertificateSecurityError
1869
("Verify failed"))
1870
# New buffer for the fingerprint
1871
buf = ctypes.create_string_buffer(20)
1872
buf_len = ctypes.c_size_t()
1873
# Get the fingerprint from the certificate into the buffer
1874
(gnutls.library.functions
1875
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1876
ctypes.byref(buf_len)))
1877
# Deinit the certificate
1878
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
# Convert the buffer to a Python bytestring
1880
fpr = ctypes.string_at(buf, buf_len.value)
1881
# Convert the bytestring to hexadecimal notation
1882
hex_fpr = binascii.hexlify(fpr).upper()
1883
return hex_fpr
1884
1885
1886
class MultiprocessingMixIn(object):
1887
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1888
def sub_process_main(self, request, address):
1889
try:
1890
self.finish_request(request, address)
1891
except Exception:
1892
self.handle_error(request, address)
1893
self.close_request(request)
1894
1895
def process_request(self, request, address):
1896
"""Start a new process to process the request."""
1897
proc = multiprocessing.Process(target = self.sub_process_main,
1898
args = (request, address))
1899
proc.start()
1900
return proc
1901
1902
1903
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1904
""" adds a pipe to the MixIn """
1905
def process_request(self, request, client_address):
1906
"""Overrides and wraps the original process_request().
1907
1908
This function creates a new pipe in self.pipe
1909
"""
1910
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1911
1912
proc = MultiprocessingMixIn.process_request(self, request,
1913
client_address)
1914
self.child_pipe.close()
1915
self.add_pipe(parent_pipe, proc)
1916
1917
def add_pipe(self, parent_pipe, proc):
1918
"""Dummy function; override as necessary"""
1919
raise NotImplementedError()
1920
1921
1922
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1923
socketserver.TCPServer, object):
1924
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1925
521
1926
Attributes:
522
settings: Server settings
523
clients: Set() of Client objects
524
1927
enabled: Boolean; whether this server is activated yet
1928
interface: None or a network interface name (string)
1929
use_ipv6: Boolean; to use IPv6 or not
525
1930
"""
526
address_family = socket.AF_INET6
527
def __init__(self, *args, **kwargs):
528
if "settings" in kwargs:
529
self.settings = kwargs["settings"]
530
del kwargs["settings"]
531
if "clients" in kwargs:
532
self.clients = kwargs["clients"]
533
del kwargs["clients"]
534
self.enabled = False
535
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1931
def __init__(self, server_address, RequestHandlerClass,
1932
interface=None, use_ipv6=True, socketfd=None):
1933
"""If socketfd is set, use that file descriptor instead of
1934
creating a new one with socket.socket().
1935
"""
1936
self.interface = interface
1937
if use_ipv6:
1938
self.address_family = socket.AF_INET6
1939
if socketfd is not None:
1940
# Save the file descriptor
1941
self.socketfd = socketfd
1942
# Save the original socket.socket() function
1943
self.socket_socket = socket.socket
1944
# To implement --socket, we monkey patch socket.socket.
1945
#
1946
# (When socketserver.TCPServer is a new-style class, we
1947
# could make self.socket into a property instead of monkey
1948
# patching socket.socket.)
1949
#
1950
# Create a one-time-only replacement for socket.socket()
1951
@functools.wraps(socket.socket)
1952
def socket_wrapper(*args, **kwargs):
1953
# Restore original function so subsequent calls are
1954
# not affected.
1955
socket.socket = self.socket_socket
1956
del self.socket_socket
1957
# This time only, return a new socket object from the
1958
# saved file descriptor.
1959
return socket.fromfd(self.socketfd, *args, **kwargs)
1960
# Replace socket.socket() function with wrapper
1961
socket.socket = socket_wrapper
1962
# The socketserver.TCPServer.__init__ will call
1963
# socket.socket(), which might be our replacement,
1964
# socket_wrapper(), if socketfd was set.
1965
socketserver.TCPServer.__init__(self, server_address,
1966
RequestHandlerClass)
1967
536
1968
def server_bind(self):
537
1969
"""This overrides the normal server_bind() function
538
1970
to bind to an interface if one was specified, and also NOT to
539
1971
bind to an address or port if they were not specified."""
540
if self.settings["interface"]:
541
# 25 is from /usr/include/asm-i486/socket.h
542
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
543
try:
544
self.socket.setsockopt(socket.SOL_SOCKET,
545
SO_BINDTODEVICE,
546
self.settings["interface"])
547
except socket.error, error:
548
if error[0] == errno.EPERM:
549
logger.error(u"No permission to"
550
u" bind to interface %s",
551
self.settings["interface"])
552
else:
553
raise error
1972
if self.interface is not None:
1973
if SO_BINDTODEVICE is None:
1974
logger.error("SO_BINDTODEVICE does not exist;"
1975
" cannot bind to interface %s",
1976
self.interface)
1977
else:
1978
try:
1979
self.socket.setsockopt(socket.SOL_SOCKET,
1980
SO_BINDTODEVICE,
1981
str(self.interface + '\0'))
1982
except socket.error as error:
1983
if error.errno == errno.EPERM:
1984
logger.error("No permission to bind to"
1985
" interface %s", self.interface)
1986
elif error.errno == errno.ENOPROTOOPT:
1987
logger.error("SO_BINDTODEVICE not available;"
1988
" cannot bind to interface %s",
1989
self.interface)
1990
elif error.errno == errno.ENODEV:
1991
logger.error("Interface %s does not exist,"
1992
" cannot bind", self.interface)
1993
else:
1994
raise
554
1995
# Only bind(2) the socket if we really need to.
555
1996
if self.server_address[0] or self.server_address[1]:
556
1997
if not self.server_address[0]:
557
in6addr_any = "::"
558
self.server_address = (in6addr_any,
1998
if self.address_family == socket.AF_INET6:
1999
any_address = "::" # in6addr_any
2000
else:
2001
any_address = "0.0.0.0" # INADDR_ANY
2002
self.server_address = (any_address,
559
2003
self.server_address[1])
560
2004
elif not self.server_address[1]:
561
2005
self.server_address = (self.server_address[0],
562
2006
0)
563
# if self.settings["interface"]:
2007
# if self.interface:
564
2008
# self.server_address = (self.server_address[0],
565
2009
# 0, # port
566
2010
# 0, # flowinfo
567
2011
# if_nametoindex
568
# (self.settings
569
# ["interface"]))
570
return super(IPv6_TCPServer, self).server_bind()
2012
# (self.interface))
2013
return socketserver.TCPServer.server_bind(self)
2014
2015
2016
class MandosServer(IPv6_TCPServer):
2017
"""Mandos server.
2018
2019
Attributes:
2020
clients: set of Client objects
2021
gnutls_priority GnuTLS priority string
2022
use_dbus: Boolean; to emit D-Bus signals or not
2023
2024
Assumes a gobject.MainLoop event loop.
2025
"""
2026
def __init__(self, server_address, RequestHandlerClass,
2027
interface=None, use_ipv6=True, clients=None,
2028
gnutls_priority=None, use_dbus=True, socketfd=None):
2029
self.enabled = False
2030
self.clients = clients
2031
if self.clients is None:
2032
self.clients = {}
2033
self.use_dbus = use_dbus
2034
self.gnutls_priority = gnutls_priority
2035
IPv6_TCPServer.__init__(self, server_address,
2036
RequestHandlerClass,
2037
interface = interface,
2038
use_ipv6 = use_ipv6,
2039
socketfd = socketfd)
571
2040
def server_activate(self):
572
2041
if self.enabled:
573
return super(IPv6_TCPServer, self).server_activate()
2042
return socketserver.TCPServer.server_activate(self)
2043
574
2044
def enable(self):
575
2045
self.enabled = True
2046
2047
def add_pipe(self, parent_pipe, proc):
2048
# Call "handle_ipc" for both data and EOF events
2049
gobject.io_add_watch(parent_pipe.fileno(),
2050
gobject.IO_IN | gobject.IO_HUP,
2051
functools.partial(self.handle_ipc,
2052
parent_pipe =
2053
parent_pipe,
2054
proc = proc))
2055
2056
def handle_ipc(self, source, condition, parent_pipe=None,
2057
proc = None, client_object=None):
2058
# error, or the other end of multiprocessing.Pipe has closed
2059
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2060
# Wait for other process to exit
2061
proc.join()
2062
return False
2063
2064
# Read a request from the child
2065
request = parent_pipe.recv()
2066
command = request[0]
2067
2068
if command == 'init':
2069
fpr = request[1]
2070
address = request[2]
2071
2072
for c in self.clients.itervalues():
2073
if c.fingerprint == fpr:
2074
client = c
2075
break
2076
else:
2077
logger.info("Client not found for fingerprint: %s, ad"
2078
"dress: %s", fpr, address)
2079
if self.use_dbus:
2080
# Emit D-Bus signal
2081
mandos_dbus_service.ClientNotFound(fpr,
2082
address[0])
2083
parent_pipe.send(False)
2084
return False
2085
2086
gobject.io_add_watch(parent_pipe.fileno(),
2087
gobject.IO_IN | gobject.IO_HUP,
2088
functools.partial(self.handle_ipc,
2089
parent_pipe =
2090
parent_pipe,
2091
proc = proc,
2092
client_object =
2093
client))
2094
parent_pipe.send(True)
2095
# remove the old hook in favor of the new above hook on
2096
# same fileno
2097
return False
2098
if command == 'funcall':
2099
funcname = request[1]
2100
args = request[2]
2101
kwargs = request[3]
2102
2103
parent_pipe.send(('data', getattr(client_object,
2104
funcname)(*args,
2105
**kwargs)))
2106
2107
if command == 'getattr':
2108
attrname = request[1]
2109
if callable(client_object.__getattribute__(attrname)):
2110
parent_pipe.send(('function',))
2111
else:
2112
parent_pipe.send(('data', client_object
2113
.__getattribute__(attrname)))
2114
2115
if command == 'setattr':
2116
attrname = request[1]
2117
value = request[2]
2118
setattr(client_object, attrname, value)
2119
2120
return True
2121
2122
2123
def rfc3339_duration_to_delta(duration):
2124
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2125
2126
>>> rfc3339_duration_to_delta("P7D")
2127
datetime.timedelta(7)
2128
>>> rfc3339_duration_to_delta("PT60S")
2129
datetime.timedelta(0, 60)
2130
>>> rfc3339_duration_to_delta("PT60M")
2131
datetime.timedelta(0, 3600)
2132
>>> rfc3339_duration_to_delta("PT24H")
2133
datetime.timedelta(1)
2134
>>> rfc3339_duration_to_delta("P1W")
2135
datetime.timedelta(7)
2136
>>> rfc3339_duration_to_delta("PT5M30S")
2137
datetime.timedelta(0, 330)
2138
>>> rfc3339_duration_to_delta("P1DT3M20S")
2139
datetime.timedelta(1, 200)
2140
"""
2141
2142
# Parsing an RFC 3339 duration with regular expressions is not
2143
# possible - there would have to be multiple places for the same
2144
# values, like seconds. The current code, while more esoteric, is
2145
# cleaner without depending on a parsing library. If Python had a
2146
# built-in library for parsing we would use it, but we'd like to
2147
# avoid excessive use of external libraries.
2148
2149
# New type for defining tokens, syntax, and semantics all-in-one
2150
Token = collections.namedtuple("Token",
2151
("regexp", # To match token; if
2152
# "value" is not None,
2153
# must have a "group"
2154
# containing digits
2155
"value", # datetime.timedelta or
2156
# None
2157
"followers")) # Tokens valid after
2158
# this token
2159
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
# the "duration" ABNF definition in RFC 3339, Appendix A.
2161
token_end = Token(re.compile(r"$"), None, frozenset())
2162
token_second = Token(re.compile(r"(\d+)S"),
2163
datetime.timedelta(seconds=1),
2164
frozenset((token_end,)))
2165
token_minute = Token(re.compile(r"(\d+)M"),
2166
datetime.timedelta(minutes=1),
2167
frozenset((token_second, token_end)))
2168
token_hour = Token(re.compile(r"(\d+)H"),
2169
datetime.timedelta(hours=1),
2170
frozenset((token_minute, token_end)))
2171
token_time = Token(re.compile(r"T"),
2172
None,
2173
frozenset((token_hour, token_minute,
2174
token_second)))
2175
token_day = Token(re.compile(r"(\d+)D"),
2176
datetime.timedelta(days=1),
2177
frozenset((token_time, token_end)))
2178
token_month = Token(re.compile(r"(\d+)M"),
2179
datetime.timedelta(weeks=4),
2180
frozenset((token_day, token_end)))
2181
token_year = Token(re.compile(r"(\d+)Y"),
2182
datetime.timedelta(weeks=52),
2183
frozenset((token_month, token_end)))
2184
token_week = Token(re.compile(r"(\d+)W"),
2185
datetime.timedelta(weeks=1),
2186
frozenset((token_end,)))
2187
token_duration = Token(re.compile(r"P"), None,
2188
frozenset((token_year, token_month,
2189
token_day, token_time,
2190
token_week))),
2191
# Define starting values
2192
value = datetime.timedelta() # Value so far
2193
found_token = None
2194
followers = frozenset(token_duration,) # Following valid tokens
2195
s = duration # String left to parse
2196
# Loop until end token is found
2197
while found_token is not token_end:
2198
# Search for any currently valid tokens
2199
for token in followers:
2200
match = token.regexp.match(s)
2201
if match is not None:
2202
# Token found
2203
if token.value is not None:
2204
# Value found, parse digits
2205
factor = int(match.group(1), 10)
2206
# Add to value so far
2207
value += factor * token.value
2208
# Strip token from string
2209
s = token.regexp.sub("", s, 1)
2210
# Go to found token
2211
found_token = token
2212
# Set valid next tokens
2213
followers = found_token.followers
2214
break
2215
else:
2216
# No currently valid tokens were found
2217
raise ValueError("Invalid RFC 3339 duration")
2218
# End token found
2219
return value
576
2220
577
2221
578
2222
def string_to_delta(interval):
579
2223
"""Parse a string and return a datetime.timedelta
580
2224
581
2225
>>> string_to_delta('7d')
582
2226
datetime.timedelta(7)
583
2227
>>> string_to_delta('60s')
586
2230
datetime.timedelta(0, 3600)
587
2231
>>> string_to_delta('24h')
588
2232
datetime.timedelta(1)
589
>>> string_to_delta(u'1w')
2233
>>> string_to_delta('1w')
590
2234
datetime.timedelta(7)
591
2235
>>> string_to_delta('5m 30s')
592
2236
datetime.timedelta(0, 330)
593
2237
"""
2238
2239
try:
2240
return rfc3339_duration_to_delta(interval)
2241
except ValueError:
2242
pass
2243
594
2244
timevalue = datetime.timedelta(0)
595
2245
for s in interval.split():
596
2246
try:
597
2247
suffix = unicode(s[-1])
598
2248
value = int(s[:-1])
599
if suffix == u"d":
2249
if suffix == "d":
600
2250
delta = datetime.timedelta(value)
601
elif suffix == u"s":
2251
elif suffix == "s":
602
2252
delta = datetime.timedelta(0, value)
603
elif suffix == u"m":
2253
elif suffix == "m":
604
2254
delta = datetime.timedelta(0, 0, 0, 0, value)
605
elif suffix == u"h":
2255
elif suffix == "h":
606
2256
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
607
elif suffix == u"w":
2257
elif suffix == "w":
608
2258
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
609
2259
else:
610
raise ValueError
611
except (ValueError, IndexError):
612
raise ValueError
2260
raise ValueError("Unknown suffix {0!r}"
2261
.format(suffix))
2262
except IndexError as e:
2263
raise ValueError(*(e.args))
613
2264
timevalue += delta
614
2265
return timevalue
615
2266
616
2267
617
def server_state_changed(state):
618
"""Derived from the Avahi example code"""
619
if state == avahi.SERVER_COLLISION:
620
logger.error(u"Zeroconf server name collision")
621
service.remove()
622
elif state == avahi.SERVER_RUNNING:
623
service.add()
624
625
626
def entry_group_state_changed(state, error):
627
"""Derived from the Avahi example code"""
628
logger.debug(u"Avahi state change: %i", state)
629
630
if state == avahi.ENTRY_GROUP_ESTABLISHED:
631
logger.debug(u"Zeroconf service established.")
632
elif state == avahi.ENTRY_GROUP_COLLISION:
633
logger.warning(u"Zeroconf service name collision.")
634
service.rename()
635
elif state == avahi.ENTRY_GROUP_FAILURE:
636
logger.critical(u"Avahi: Error in group state changed %s",
637
unicode(error))
638
raise AvahiGroupError("State changed: %s", str(error))
639
640
def if_nametoindex(interface):
641
"""Call the C function if_nametoindex(), or equivalent"""
642
global if_nametoindex
643
try:
644
if_nametoindex = ctypes.cdll.LoadLibrary\
645
(ctypes.util.find_library("c")).if_nametoindex
646
except (OSError, AttributeError):
647
if "struct" not in sys.modules:
648
import struct
649
if "fcntl" not in sys.modules:
650
import fcntl
651
def if_nametoindex(interface):
652
"Get an interface index the hard way, i.e. using fcntl()"
653
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
654
s = socket.socket()
655
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
struct.pack("16s16x", interface))
657
s.close()
658
interface_index = struct.unpack("I", ifreq[16:20])[0]
659
return interface_index
660
return if_nametoindex(interface)
661
662
663
2268
def daemon(nochdir = False, noclose = False):
664
2269
"""See daemon(3). Standard BSD Unix function.
2270
665
2271
This should really exist as os.daemon, but it doesn't (yet)."""
666
2272
if os.fork():
667
2273
sys.exit()
672
2278
sys.exit()
673
2279
if not noclose:
674
2280
# Close all standard open file descriptors
675
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2281
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
676
2282
if not stat.S_ISCHR(os.fstat(null).st_mode):
677
2283
raise OSError(errno.ENODEV,
678
"/dev/null not a character device")
2284
"{0} not a character device"
2285
.format(os.devnull))
679
2286
os.dup2(null, sys.stdin.fileno())
680
2287
os.dup2(null, sys.stdout.fileno())
681
2288
os.dup2(null, sys.stderr.fileno())
684
2291
685
2292
686
2293
def main():
687
parser = OptionParser(version = "%%prog %s" % version)
688
parser.add_option("-i", "--interface", type="string",
689
metavar="IF", help="Bind to interface IF")
690
parser.add_option("-a", "--address", type="string",
691
help="Address to listen for requests on")
692
parser.add_option("-p", "--port", type="int",
693
help="Port number to receive requests on")
694
parser.add_option("--check", action="store_true", default=False,
695
help="Run self-test")
696
parser.add_option("--debug", action="store_true",
697
help="Debug mode; run in foreground and log to"
698
" terminal")
699
parser.add_option("--priority", type="string", help="GnuTLS"
700
" priority string (see GnuTLS documentation)")
701
parser.add_option("--servicename", type="string", metavar="NAME",
702
help="Zeroconf service name")
703
parser.add_option("--configdir", type="string",
704
default="/etc/mandos", metavar="DIR",
705
help="Directory to search for configuration"
706
" files")
707
options = parser.parse_args()[0]
2294
2295
##################################################################
2296
# Parsing of options, both command line and config file
2297
2298
parser = argparse.ArgumentParser()
2299
parser.add_argument("-v", "--version", action="version",
2300
version = "%(prog)s {0}".format(version),
2301
help="show version number and exit")
2302
parser.add_argument("-i", "--interface", metavar="IF",
2303
help="Bind to interface IF")
2304
parser.add_argument("-a", "--address",
2305
help="Address to listen for requests on")
2306
parser.add_argument("-p", "--port", type=int,
2307
help="Port number to receive requests on")
2308
parser.add_argument("--check", action="store_true",
2309
help="Run self-test")
2310
parser.add_argument("--debug", action="store_true",
2311
help="Debug mode; run in foreground and log"
2312
" to terminal", default=None)
2313
parser.add_argument("--debuglevel", metavar="LEVEL",
2314
help="Debug level for stdout output")
2315
parser.add_argument("--priority", help="GnuTLS"
2316
" priority string (see GnuTLS documentation)")
2317
parser.add_argument("--servicename",
2318
metavar="NAME", help="Zeroconf service name")
2319
parser.add_argument("--configdir",
2320
default="/etc/mandos", metavar="DIR",
2321
help="Directory to search for configuration"
2322
" files")
2323
parser.add_argument("--no-dbus", action="store_false",
2324
dest="use_dbus", help="Do not provide D-Bus"
2325
" system bus interface", default=None)
2326
parser.add_argument("--no-ipv6", action="store_false",
2327
dest="use_ipv6", help="Do not use IPv6",
2328
default=None)
2329
parser.add_argument("--no-restore", action="store_false",
2330
dest="restore", help="Do not restore stored"
2331
" state", default=None)
2332
parser.add_argument("--socket", type=int,
2333
help="Specify a file descriptor to a network"
2334
" socket to use instead of creating one")
2335
parser.add_argument("--statedir", metavar="DIR",
2336
help="Directory to save/restore state in")
2337
parser.add_argument("--foreground", action="store_true",
2338
help="Run in foreground", default=None)
2339
2340
options = parser.parse_args()
708
2341
709
2342
if options.check:
710
2343
import doctest
711
doctest.testmod()
712
sys.exit()
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
713
2346
714
2347
# Default values for config file for server-global settings
715
2348
server_defaults = { "interface": "",
717
2350
"port": "",
718
2351
"debug": "False",
719
2352
"priority":
720
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
721
2354
"servicename": "Mandos",
2355
"use_dbus": "True",
2356
"use_ipv6": "True",
2357
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
722
2362
}
723
2363
724
2364
# Parse config file for server-global settings
725
server_config = ConfigParser.SafeConfigParser(server_defaults)
2365
server_config = configparser.SafeConfigParser(server_defaults)
726
2366
del server_defaults
727
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2367
server_config.read(os.path.join(options.configdir,
2368
"mandos.conf"))
728
2369
# Convert the SafeConfigParser object to a dict
729
2370
server_settings = server_config.defaults()
730
# Use getboolean on the boolean config option
731
server_settings["debug"] = server_config.getboolean\
732
("DEFAULT", "debug")
2371
# Use the appropriate methods on the non-string config options
2372
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2373
server_settings[option] = server_config.getboolean("DEFAULT",
2374
option)
2375
if server_settings["port"]:
2376
server_settings["port"] = server_config.getint("DEFAULT",
2377
"port")
2378
if server_settings["socket"]:
2379
server_settings["socket"] = server_config.getint("DEFAULT",
2380
"socket")
2381
# Later, stdin will, and stdout and stderr might, be dup'ed
2382
# over with an opened os.devnull. But we don't want this to
2383
# happen with a supplied network socket.
2384
if 0 <= server_settings["socket"] <= 2:
2385
server_settings["socket"] = os.dup(server_settings
2386
["socket"])
733
2387
del server_config
734
2388
735
2389
# Override the settings from the config file with command line
736
2390
# options, if set.
737
2391
for option in ("interface", "address", "port", "debug",
738
"priority", "servicename", "configdir"):
2392
"priority", "servicename", "configdir",
2393
"use_dbus", "use_ipv6", "debuglevel", "restore",
2394
"statedir", "socket", "foreground"):
739
2395
value = getattr(options, option)
740
2396
if value is not None:
741
2397
server_settings[option] = value
742
2398
del options
2399
# Force all strings to be unicode
2400
for option in server_settings.keys():
2401
if type(server_settings[option]) is str:
2402
server_settings[option] = unicode(server_settings[option])
2403
# Force all boolean options to be boolean
2404
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2405
"foreground"):
2406
server_settings[option] = bool(server_settings[option])
2407
# Debug implies foreground
2408
if server_settings["debug"]:
2409
server_settings["foreground"] = True
743
2410
# Now we have our good server settings in "server_settings"
744
2411
2412
##################################################################
2413
2414
# For convenience
745
2415
debug = server_settings["debug"]
2416
debuglevel = server_settings["debuglevel"]
2417
use_dbus = server_settings["use_dbus"]
2418
use_ipv6 = server_settings["use_ipv6"]
2419
stored_state_path = os.path.join(server_settings["statedir"],
2420
stored_state_file)
2421
foreground = server_settings["foreground"]
746
2422
747
if not debug:
748
syslogger.setLevel(logging.WARNING)
749
console.setLevel(logging.WARNING)
2423
if debug:
2424
initlogger(debug, logging.DEBUG)
2425
else:
2426
if not debuglevel:
2427
initlogger(debug)
2428
else:
2429
level = getattr(logging, debuglevel.upper())
2430
initlogger(debug, level)
750
2431
751
2432
if server_settings["servicename"] != "Mandos":
752
syslogger.setFormatter(logging.Formatter\
753
('Mandos (%s): %%(levelname)s:'
754
' %%(message)s'
755
% server_settings["servicename"]))
2433
syslogger.setFormatter(logging.Formatter
2434
('Mandos ({0}) [%(process)d]:'
2435
' %(levelname)s: %(message)s'
2436
.format(server_settings
2437
["servicename"])))
756
2438
757
2439
# Parse config file with clients
758
client_defaults = { "timeout": "1h",
759
"interval": "5m",
760
"checker": "fping -q -- %(host)s",
761
"host": "",
762
}
763
client_config = ConfigParser.SafeConfigParser(client_defaults)
2440
client_config = configparser.SafeConfigParser(Client
2441
.client_defaults)
764
2442
client_config.read(os.path.join(server_settings["configdir"],
765
2443
"clients.conf"))
766
2444
767
clients = Set()
768
tcp_server = IPv6_TCPServer((server_settings["address"],
769
server_settings["port"]),
770
TCP_handler,
771
settings=server_settings,
772
clients=clients)
773
pidfilename = "/var/run/mandos.pid"
774
try:
775
pidfile = open(pidfilename, "w")
776
except IOError, error:
777
logger.error("Could not open file %r", pidfilename)
778
779
uid = 65534
780
gid = 65534
781
try:
782
uid = pwd.getpwnam("mandos").pw_uid
783
except KeyError:
784
try:
785
uid = pwd.getpwnam("nobody").pw_uid
786
except KeyError:
787
pass
788
try:
789
gid = pwd.getpwnam("mandos").pw_gid
790
except KeyError:
791
try:
792
gid = pwd.getpwnam("nogroup").pw_gid
793
except KeyError:
794
pass
795
try:
2445
global mandos_dbus_service
2446
mandos_dbus_service = None
2447
2448
tcp_server = MandosServer((server_settings["address"],
2449
server_settings["port"]),
2450
ClientHandler,
2451
interface=(server_settings["interface"]
2452
or None),
2453
use_ipv6=use_ipv6,
2454
gnutls_priority=
2455
server_settings["priority"],
2456
use_dbus=use_dbus,
2457
socketfd=(server_settings["socket"]
2458
or None))
2459
if not foreground:
2460
pidfilename = "/run/mandos.pid"
2461
if not os.path.isdir("/run/."):
2462
pidfilename = "/var/run/mandos.pid"
2463
pidfile = None
2464
try:
2465
pidfile = open(pidfilename, "w")
2466
except IOError as e:
2467
logger.error("Could not open file %r", pidfilename,
2468
exc_info=e)
2469
2470
for name in ("_mandos", "mandos", "nobody"):
2471
try:
2472
uid = pwd.getpwnam(name).pw_uid
2473
gid = pwd.getpwnam(name).pw_gid
2474
break
2475
except KeyError:
2476
continue
2477
else:
2478
uid = 65534
2479
gid = 65534
2480
try:
2481
os.setgid(gid)
796
2482
os.setuid(uid)
797
os.setgid(gid)
798
except OSError, error:
799
if error[0] != errno.EPERM:
800
raise error
801
802
global service
803
service = AvahiService(name = server_settings["servicename"],
804
servicetype = "_mandos._tcp", )
805
if server_settings["interface"]:
806
service.interface = if_nametoindex\
807
(server_settings["interface"])
2483
except OSError as error:
2484
if error.errno != errno.EPERM:
2485
raise
2486
2487
if debug:
2488
# Enable all possible GnuTLS debugging
2489
2490
# "Use a log level over 10 to enable all debugging options."
2491
# - GnuTLS manual
2492
gnutls.library.functions.gnutls_global_set_log_level(11)
2493
2494
@gnutls.library.types.gnutls_log_func
2495
def debug_gnutls(level, string):
2496
logger.debug("GnuTLS: %s", string[:-1])
2497
2498
(gnutls.library.functions
2499
.gnutls_global_set_log_function(debug_gnutls))
2500
2501
# Redirect stdin so all checkers get /dev/null
2502
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2503
os.dup2(null, sys.stdin.fileno())
2504
if null > 2:
2505
os.close(null)
2506
2507
# Need to fork before connecting to D-Bus
2508
if not foreground:
2509
# Close all input and output, do double fork, etc.
2510
daemon()
2511
2512
# multiprocessing will use threads, so before we use gobject we
2513
# need to inform gobject that threads will be used.
2514
gobject.threads_init()
808
2515
809
2516
global main_loop
810
global bus
811
global server
812
2517
# From the Avahi example code
813
DBusGMainLoop(set_as_default=True )
2518
DBusGMainLoop(set_as_default=True)
814
2519
main_loop = gobject.MainLoop()
815
2520
bus = dbus.SystemBus()
816
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
avahi.DBUS_PATH_SERVER),
818
avahi.DBUS_INTERFACE_SERVER)
819
2521
# End of Avahi example code
820
821
def remove_from_clients(client):
822
clients.remove(client)
823
if not clients:
824
logger.critical(u"No clients left, exiting")
825
sys.exit()
826
827
clients.update(Set(Client(name = section,
828
stop_hook = remove_from_clients,
829
config
830
= dict(client_config.items(section)))
831
for section in client_config.sections()))
832
if not clients:
833
logger.critical(u"No clients defined")
834
sys.exit(1)
835
836
if debug:
837
# Redirect stdin so all checkers get /dev/null
838
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
839
os.dup2(null, sys.stdin.fileno())
840
if null > 2:
841
os.close(null)
842
else:
843
# No console logging
844
logger.removeHandler(console)
845
# Close all input and output, do double fork, etc.
846
daemon()
847
848
try:
849
pid = os.getpid()
850
pidfile.write(str(pid) + "\n")
851
pidfile.close()
2522
if use_dbus:
2523
try:
2524
bus_name = dbus.service.BusName("se.recompile.Mandos",
2525
bus, do_not_queue=True)
2526
old_bus_name = (dbus.service.BusName
2527
("se.bsnet.fukt.Mandos", bus,
2528
do_not_queue=True))
2529
except dbus.exceptions.NameExistsException as e:
2530
logger.error("Disabling D-Bus:", exc_info=e)
2531
use_dbus = False
2532
server_settings["use_dbus"] = False
2533
tcp_server.use_dbus = False
2534
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2535
service = AvahiServiceToSyslog(name =
2536
server_settings["servicename"],
2537
servicetype = "_mandos._tcp",
2538
protocol = protocol, bus = bus)
2539
if server_settings["interface"]:
2540
service.interface = (if_nametoindex
2541
(str(server_settings["interface"])))
2542
2543
global multiprocessing_manager
2544
multiprocessing_manager = multiprocessing.Manager()
2545
2546
client_class = Client
2547
if use_dbus:
2548
client_class = functools.partial(ClientDBus, bus = bus)
2549
2550
client_settings = Client.config_parser(client_config)
2551
old_client_settings = {}
2552
clients_data = {}
2553
2554
# This is used to redirect stdout and stderr for checker processes
2555
global wnull
2556
wnull = open(os.devnull, "w") # A writable /dev/null
2557
# Only used if server is running in foreground but not in debug
2558
# mode
2559
if debug or not foreground:
2560
wnull.close()
2561
2562
# Get client data and settings from last running state.
2563
if server_settings["restore"]:
2564
try:
2565
with open(stored_state_path, "rb") as stored_state:
2566
clients_data, old_client_settings = (pickle.load
2567
(stored_state))
2568
os.remove(stored_state_path)
2569
except IOError as e:
2570
if e.errno == errno.ENOENT:
2571
logger.warning("Could not load persistent state: {0}"
2572
.format(os.strerror(e.errno)))
2573
else:
2574
logger.critical("Could not load persistent state:",
2575
exc_info=e)
2576
raise
2577
except EOFError as e:
2578
logger.warning("Could not load persistent state: "
2579
"EOFError:", exc_info=e)
2580
2581
with PGPEngine() as pgp:
2582
for client_name, client in clients_data.iteritems():
2583
# Skip removed clients
2584
if client_name not in client_settings:
2585
continue
2586
2587
# Decide which value to use after restoring saved state.
2588
# We have three different values: Old config file,
2589
# new config file, and saved state.
2590
# New config value takes precedence if it differs from old
2591
# config value, otherwise use saved state.
2592
for name, value in client_settings[client_name].items():
2593
try:
2594
# For each value in new config, check if it
2595
# differs from the old config value (Except for
2596
# the "secret" attribute)
2597
if (name != "secret" and
2598
value != old_client_settings[client_name]
2599
[name]):
2600
client[name] = value
2601
except KeyError:
2602
pass
2603
2604
# Clients who has passed its expire date can still be
2605
# enabled if its last checker was successful. Clients
2606
# whose checker succeeded before we stored its state is
2607
# assumed to have successfully run all checkers during
2608
# downtime.
2609
if client["enabled"]:
2610
if datetime.datetime.utcnow() >= client["expires"]:
2611
if not client["last_checked_ok"]:
2612
logger.warning(
2613
"disabling client {0} - Client never "
2614
"performed a successful checker"
2615
.format(client_name))
2616
client["enabled"] = False
2617
elif client["last_checker_status"] != 0:
2618
logger.warning(
2619
"disabling client {0} - Client "
2620
"last checker failed with error code {1}"
2621
.format(client_name,
2622
client["last_checker_status"]))
2623
client["enabled"] = False
2624
else:
2625
client["expires"] = (datetime.datetime
2626
.utcnow()
2627
+ client["timeout"])
2628
logger.debug("Last checker succeeded,"
2629
" keeping {0} enabled"
2630
.format(client_name))
2631
try:
2632
client["secret"] = (
2633
pgp.decrypt(client["encrypted_secret"],
2634
client_settings[client_name]
2635
["secret"]))
2636
except PGPError:
2637
# If decryption fails, we use secret from new settings
2638
logger.debug("Failed to decrypt {0} old secret"
2639
.format(client_name))
2640
client["secret"] = (
2641
client_settings[client_name]["secret"])
2642
2643
# Add/remove clients based on new changes made to config
2644
for client_name in (set(old_client_settings)
2645
- set(client_settings)):
2646
del clients_data[client_name]
2647
for client_name in (set(client_settings)
2648
- set(old_client_settings)):
2649
clients_data[client_name] = client_settings[client_name]
2650
2651
# Create all client objects
2652
for client_name, client in clients_data.iteritems():
2653
tcp_server.clients[client_name] = client_class(
2654
name = client_name, settings = client,
2655
server_settings = server_settings)
2656
2657
if not tcp_server.clients:
2658
logger.warning("No clients defined")
2659
2660
if not foreground:
2661
if pidfile is not None:
2662
try:
2663
with pidfile:
2664
pid = os.getpid()
2665
pidfile.write(str(pid) + "\n".encode("utf-8"))
2666
except IOError:
2667
logger.error("Could not write to file %r with PID %d",
2668
pidfilename, pid)
852
2669
del pidfile
853
except IOError:
854
logger.error(u"Could not write to file %r with PID %d",
855
pidfilename, pid)
856
except NameError:
857
# "pidfile" was never created
858
pass
859
del pidfilename
2670
del pidfilename
2671
2672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2674
2675
if use_dbus:
2676
@alternate_dbus_interfaces({"se.recompile.Mandos":
2677
"se.bsnet.fukt.Mandos"})
2678
class MandosDBusService(DBusObjectWithProperties):
2679
"""A D-Bus proxy object"""
2680
def __init__(self):
2681
dbus.service.Object.__init__(self, bus, "/")
2682
_interface = "se.recompile.Mandos"
2683
2684
@dbus_interface_annotations(_interface)
2685
def _foo(self):
2686
return { "org.freedesktop.DBus.Property"
2687
".EmitsChangedSignal":
2688
"false"}
2689
2690
@dbus.service.signal(_interface, signature="o")
2691
def ClientAdded(self, objpath):
2692
"D-Bus signal"
2693
pass
2694
2695
@dbus.service.signal(_interface, signature="ss")
2696
def ClientNotFound(self, fingerprint, address):
2697
"D-Bus signal"
2698
pass
2699
2700
@dbus.service.signal(_interface, signature="os")
2701
def ClientRemoved(self, objpath, name):
2702
"D-Bus signal"
2703
pass
2704
2705
@dbus.service.method(_interface, out_signature="ao")
2706
def GetAllClients(self):
2707
"D-Bus method"
2708
return dbus.Array(c.dbus_object_path
2709
for c in
2710
tcp_server.clients.itervalues())
2711
2712
@dbus.service.method(_interface,
2713
out_signature="a{oa{sv}}")
2714
def GetAllClientsWithProperties(self):
2715
"D-Bus method"
2716
return dbus.Dictionary(
2717
((c.dbus_object_path, c.GetAll(""))
2718
for c in tcp_server.clients.itervalues()),
2719
signature="oa{sv}")
2720
2721
@dbus.service.method(_interface, in_signature="o")
2722
def RemoveClient(self, object_path):
2723
"D-Bus method"
2724
for c in tcp_server.clients.itervalues():
2725
if c.dbus_object_path == object_path:
2726
del tcp_server.clients[c.name]
2727
c.remove_from_connection()
2728
# Don't signal anything except ClientRemoved
2729
c.disable(quiet=True)
2730
# Emit D-Bus signal
2731
self.ClientRemoved(object_path, c.name)
2732
return
2733
raise KeyError(object_path)
2734
2735
del _interface
2736
2737
mandos_dbus_service = MandosDBusService()
860
2738
861
2739
def cleanup():
862
2740
"Cleanup function; run on exit"
863
global group
864
# From the Avahi example code
865
if not group is None:
866
group.Free()
867
group = None
868
# End of Avahi example code
869
870
while clients:
871
client = clients.pop()
872
client.stop_hook = None
873
client.stop()
2741
service.cleanup()
2742
2743
multiprocessing.active_children()
2744
wnull.close()
2745
if not (tcp_server.clients or client_settings):
2746
return
2747
2748
# Store client before exiting. Secrets are encrypted with key
2749
# based on what config file has. If config file is
2750
# removed/edited, old secret will thus be unrecovable.
2751
clients = {}
2752
with PGPEngine() as pgp:
2753
for client in tcp_server.clients.itervalues():
2754
key = client_settings[client.name]["secret"]
2755
client.encrypted_secret = pgp.encrypt(client.secret,
2756
key)
2757
client_dict = {}
2758
2759
# A list of attributes that can not be pickled
2760
# + secret.
2761
exclude = set(("bus", "changedstate", "secret",
2762
"checker", "server_settings"))
2763
for name, typ in (inspect.getmembers
2764
(dbus.service.Object)):
2765
exclude.add(name)
2766
2767
client_dict["encrypted_secret"] = (client
2768
.encrypted_secret)
2769
for attr in client.client_structure:
2770
if attr not in exclude:
2771
client_dict[attr] = getattr(client, attr)
2772
2773
clients[client.name] = client_dict
2774
del client_settings[client.name]["secret"]
2775
2776
try:
2777
with (tempfile.NamedTemporaryFile
2778
(mode='wb', suffix=".pickle", prefix='clients-',
2779
dir=os.path.dirname(stored_state_path),
2780
delete=False)) as stored_state:
2781
pickle.dump((clients, client_settings), stored_state)
2782
tempname=stored_state.name
2783
os.rename(tempname, stored_state_path)
2784
except (IOError, OSError) as e:
2785
if not debug:
2786
try:
2787
os.remove(tempname)
2788
except NameError:
2789
pass
2790
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
logger.warning("Could not save persistent state: {0}"
2792
.format(os.strerror(e.errno)))
2793
else:
2794
logger.warning("Could not save persistent state:",
2795
exc_info=e)
2796
raise
2797
2798
# Delete all clients, and settings from config
2799
while tcp_server.clients:
2800
name, client = tcp_server.clients.popitem()
2801
if use_dbus:
2802
client.remove_from_connection()
2803
# Don't signal anything except ClientRemoved
2804
client.disable(quiet=True)
2805
if use_dbus:
2806
# Emit D-Bus signal
2807
mandos_dbus_service.ClientRemoved(client
2808
.dbus_object_path,
2809
client.name)
2810
client_settings.clear()
874
2811
875
2812
atexit.register(cleanup)
876
2813
877
if not debug:
878
signal.signal(signal.SIGINT, signal.SIG_IGN)
879
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
880
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
881
882
for client in clients:
883
client.start()
2814
for client in tcp_server.clients.itervalues():
2815
if use_dbus:
2816
# Emit D-Bus signal
2817
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2818
# Need to initiate checking of clients
2819
if client.enabled:
2820
client.init_checker()
884
2821
885
2822
tcp_server.enable()
886
2823
tcp_server.server_activate()
887
2824
888
2825
# Find out what port we got
889
2826
service.port = tcp_server.socket.getsockname()[1]
890
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
u" scope_id %d" % tcp_server.socket.getsockname())
2827
if use_ipv6:
2828
logger.info("Now listening on address %r, port %d,"
2829
" flowinfo %d, scope_id %d",
2830
*tcp_server.socket.getsockname())
2831
else: # IPv4
2832
logger.info("Now listening on address %r, port %d",
2833
*tcp_server.socket.getsockname())
892
2834
893
2835
#service.interface = tcp_server.socket.getsockname()[3]
894
2836
895
2837
try:
896
2838
# From the Avahi example code
897
server.connect_to_signal("StateChanged", server_state_changed)
898
2839
try:
899
server_state_changed(server.GetState())
900
except dbus.exceptions.DBusException, error:
901
logger.critical(u"DBusException: %s", error)
2840
service.activate()
2841
except dbus.exceptions.DBusException as error:
2842
logger.critical("D-Bus Exception", exc_info=error)
2843
cleanup()
902
2844
sys.exit(1)
903
2845
# End of Avahi example code
904
2846
905
2847
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
906
2848
lambda *args, **kwargs:
907
tcp_server.handle_request\
908
(*args[2:], **kwargs) or True)
2849
(tcp_server.handle_request
2850
(*args[2:], **kwargs) or True))
909
2851
910
logger.debug(u"Starting main loop")
2852
logger.debug("Starting main loop")
911
2853
main_loop.run()
912
except AvahiError, error:
913
logger.critical(u"AvahiError: %s" + unicode(error))
2854
except AvahiError as error:
2855
logger.critical("Avahi Error", exc_info=error)
2856
cleanup()
914
2857
sys.exit(1)
915
2858
except KeyboardInterrupt:
916
2859
if debug:
917
print
2860
print("", file=sys.stderr)
2861
logger.debug("Server received KeyboardInterrupt")
2862
logger.debug("Server exiting")
2863
# Must run before the D-Bus bus name gets deregistered
2864
cleanup()
918
2865
919
2866
if __name__ == '__main__':
920
2867
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0