To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 634
- compare with another revision
- download diff
- download tarball
- view history from revision 634
- Committer: Teddy Hogeborn
- Date: 2013-10-24 20:21:45 UTC
- Revision ID: teddy@recompile.se-20131024202145-456a9y6x910a2vhb
* debian/control (Build-Depends): Changed debhelper version to (>= 9)
to match debian/compat.
* mandos-options.xml (priority): Changed back to normal priority.
(priority_compat): New option; for the server which needs to a
priority string compatible with old keys.
* mandos-conf.xml (OPTIONS/priority): Include "priority_compat".
* mandos.xml (OPTIONS/priority): - '' -
to match debian/compat.
* mandos-options.xml (priority): Changed back to normal priority.
(priority_compat): New option; for the server which needs to a
priority string compatible with old keys.
* mandos-conf.xml (OPTIONS/priority): Include "priority_compat".
* mandos.xml (OPTIONS/priority): - '' -
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- 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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2013 Teddy Hogeborn
15
# Copyright © 2008-2013 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
import select
38
from optparse import OptionParser
41
import argparse
39
42
import datetime
40
43
import errno
41
44
import gnutls.crypto
44
47
import gnutls.library.functions
45
48
import gnutls.library.constants
46
49
import gnutls.library.types
47
import ConfigParser
50
import ConfigParser as configparser
48
51
import sys
49
52
import re
50
53
import os
51
54
import signal
52
from sets import Set
53
55
import subprocess
54
56
import atexit
55
57
import stat
56
58
import logging
57
59
import logging.handlers
58
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
59
72
60
73
import dbus
74
import dbus.service
61
75
import gobject
62
76
import avahi
63
77
from dbus.mainloop.glib import DBusGMainLoop
64
78
import ctypes
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)
79
import ctypes.util
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 = "1.6.1"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
98
99
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
103
except (OSError, AttributeError):
104
def if_nametoindex(interface):
105
"Get an interface index the hard way, i.e. using fcntl()"
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
with contextlib.closing(socket.socket()) as s:
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
113
return interface_index
114
115
116
def initlogger(debug, level=logging.WARNING):
117
"""init logger and add loglevel"""
118
119
syslogger.setFormatter(logging.Formatter
120
('Mandos [%(process)d]: %(levelname)s:'
121
' %(message)s'))
122
logger.addHandler(syslogger)
123
124
if debug:
125
console = logging.StreamHandler()
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
' [%(process)d]:'
128
' %(levelname)s:'
129
' %(message)s'))
130
logger.addHandler(console)
131
logger.setLevel(level)
132
133
134
class PGPError(Exception):
135
"""Exception if encryption/decryption fails"""
136
pass
137
138
139
class PGPEngine(object):
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
141
def __init__(self):
142
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
self.gnupgargs = ['--batch',
144
'--home', self.tempdir,
145
'--force-mdc',
146
'--quiet',
147
'--no-use-agent']
148
149
def __enter__(self):
150
return self
151
152
def __exit__(self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
181
return encoded
182
183
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
186
) as passfile:
187
passfile.write(passphrase)
188
passfile.flush()
189
proc = subprocess.Popen(['gpg', '--symmetric',
190
'--passphrase-file',
191
passfile.name]
192
+ self.gnupgargs,
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
if proc.returncode != 0:
198
raise PGPError(err)
199
return ciphertext
200
201
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
204
) as passfile:
205
passfile.write(passphrase)
206
passfile.flush()
207
proc = subprocess.Popen(['gpg', '--decrypt',
208
'--passphrase-file',
209
passfile.name]
210
+ self.gnupgargs,
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
215
= data)
216
if proc.returncode != 0:
217
raise PGPError(err)
218
return decrypted_plaintext
219
80
220
81
221
class AvahiError(Exception):
82
def __init__(self, value):
222
def __init__(self, value, *args, **kwargs):
83
223
self.value = value
84
def __str__(self):
85
return repr(self.value)
224
super(AvahiError, self).__init__(value, *args, **kwargs)
225
def __unicode__(self):
226
return unicode(repr(self.value))
86
227
87
228
class AvahiServiceError(AvahiError):
88
229
pass
93
234
94
235
class AvahiService(object):
95
236
"""An Avahi (Zeroconf) service.
237
96
238
Attributes:
97
239
interface: integer; avahi.IF_UNSPEC or an interface index.
98
240
Used to optionally bind to the specified interface.
99
241
name: string; Example: 'Mandos'
100
242
type: string; Example: '_mandos._tcp'.
101
See <http://www.dns-sd.org/ServiceTypes.html>
243
See <https://www.iana.org/assignments/service-names-port-numbers>
102
244
port: integer; what port to announce
103
245
TXT: list of strings; TXT record for the service
104
246
domain: string; Domain to publish on, default to .local if empty.
106
248
max_renames: integer; maximum number of renames
107
249
rename_count: integer; counter so we only rename after collisions
108
250
a sensible number of times
251
group: D-Bus Entry Group
252
server: D-Bus Server
253
bus: dbus.SystemBus()
109
254
"""
255
110
256
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
257
servicetype = None, port = None, TXT = None,
258
domain = "", host = "", max_renames = 32768,
259
protocol = avahi.PROTO_UNSPEC, bus = None):
113
260
self.interface = interface
114
261
self.name = name
115
self.type = type
262
self.type = servicetype
116
263
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
264
self.TXT = TXT if TXT is not None else []
121
265
self.domain = domain
122
266
self.host = host
123
267
self.rename_count = 0
124
268
self.max_renames = max_renames
269
self.protocol = protocol
270
self.group = None # our entry group
271
self.server = None
272
self.bus = bus
273
self.entry_group_state_changed_match = None
274
125
275
def rename(self):
126
276
"""Derived from the Avahi example code"""
127
277
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
278
logger.critical("No suitable Zeroconf service name found"
279
" after %i retries, exiting.",
280
self.rename_count)
131
281
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
284
logger.info("Changing Zeroconf service name to %r ...",
285
self.name)
138
286
self.remove()
139
self.add()
287
try:
288
self.add()
289
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
291
self.cleanup()
292
os._exit(1)
140
293
self.rename_count += 1
294
141
295
def remove(self):
142
296
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
297
if self.entry_group_state_changed_match is not None:
298
self.entry_group_state_changed_match.remove()
299
self.entry_group_state_changed_match = None
300
if self.group is not None:
301
self.group.Reset()
302
145
303
def add(self):
146
304
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
305
self.remove()
306
if self.group is None:
307
self.group = dbus.Interface(
308
self.bus.get_object(avahi.DBUS_NAME,
309
self.server.EntryGroupNew()),
310
avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
self.entry_group_state_changed_match = (
312
self.group.connect_to_signal(
313
'StateChanged', self.entry_group_state_changed))
314
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
self.name, self.type)
316
self.group.AddService(
317
self.interface,
318
self.protocol,
319
dbus.UInt32(0), # flags
320
self.name, self.type,
321
self.domain, self.host,
322
dbus.UInt16(self.port),
323
avahi.string_array_to_txt_array(self.TXT))
324
self.group.Commit()
325
326
def entry_group_state_changed(self, state, error):
327
"""Derived from the Avahi example code"""
328
logger.debug("Avahi entry group state change: %i", state)
329
330
if state == avahi.ENTRY_GROUP_ESTABLISHED:
331
logger.debug("Zeroconf service established.")
332
elif state == avahi.ENTRY_GROUP_COLLISION:
333
logger.info("Zeroconf service name collision.")
334
self.rename()
335
elif state == avahi.ENTRY_GROUP_FAILURE:
336
logger.critical("Avahi: Error in group state changed %s",
337
unicode(error))
338
raise AvahiGroupError("State changed: {0!s}"
339
.format(error))
340
341
def cleanup(self):
342
"""Derived from the Avahi example code"""
343
if self.group is not None:
344
try:
345
self.group.Free()
346
except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
348
pass
349
self.group = None
350
self.remove()
351
352
def server_state_changed(self, state, error=None):
353
"""Derived from the Avahi example code"""
354
logger.debug("Avahi server state change: %i", state)
355
bad_states = { avahi.SERVER_INVALID:
356
"Zeroconf server invalid",
357
avahi.SERVER_REGISTERING: None,
358
avahi.SERVER_COLLISION:
359
"Zeroconf server name collision",
360
avahi.SERVER_FAILURE:
361
"Zeroconf server failure" }
362
if state in bad_states:
363
if bad_states[state] is not None:
364
if error is None:
365
logger.error(bad_states[state])
366
else:
367
logger.error(bad_states[state] + ": %r", error)
368
self.cleanup()
369
elif state == avahi.SERVER_RUNNING:
370
self.add()
371
else:
372
if error is None:
373
logger.debug("Unknown state: %r", state)
374
else:
375
logger.debug("Unknown state: %r: %r", state, error)
376
377
def activate(self):
378
"""Derived from the Avahi example code"""
379
if self.server is None:
380
self.server = dbus.Interface(
381
self.bus.get_object(avahi.DBUS_NAME,
382
avahi.DBUS_PATH_SERVER,
383
follow_name_owner_changes=True),
384
avahi.DBUS_INTERFACE_SERVER)
385
self.server.connect_to_signal("StateChanged",
386
self.server_state_changed)
387
self.server_state_changed(self.server.GetState())
388
389
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
401
def timedelta_to_milliseconds(td):
402
"Convert a datetime.timedelta() to milliseconds"
403
return ((td.days * 24 * 60 * 60 * 1000)
404
+ (td.seconds * 1000)
405
+ (td.microseconds // 1000))
170
406
171
407
172
408
class Client(object):
173
409
"""A representation of a client host served by this server.
410
174
411
Attributes:
175
name: string; from the config file, used in log messages
412
approved: bool(); 'None' if not yet approved/disapproved
413
approval_delay: datetime.timedelta(); Time to wait for approval
414
approval_duration: datetime.timedelta(); Duration of one approval
415
checker: subprocess.Popen(); a running checker process used
416
to see if the client lives.
417
'None' if no process is running.
418
checker_callback_tag: a gobject event source tag, or None
419
checker_command: string; External command which is run to check
420
if client lives. %() expansions are done at
421
runtime with vars(self) as dict, so that for
422
instance %(name)s can be used in the command.
423
checker_initiator_tag: a gobject event source tag, or None
424
created: datetime.datetime(); (UTC) object creation
425
client_structure: Object describing what attributes a client has
426
and is used for storing the client at exit
427
current_checker_command: string; current running checker_command
428
disable_initiator_tag: a gobject event source tag, or None
429
enabled: bool()
176
430
fingerprint: string (40 or 32 hexadecimal digits); used to
177
431
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
191
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
194
runtime with vars(self) as dict, so that for
195
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
432
host: string; available for use by the checker command
433
interval: datetime.timedelta(); How often to start a new checker
434
last_approval_request: datetime.datetime(); (UTC) or None
435
last_checked_ok: datetime.datetime(); (UTC) or None
436
last_checker_status: integer between 0 and 255 reflecting exit
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
last_enabled: datetime.datetime(); (UTC) or None
440
name: string; from the config file, used in log messages and
441
D-Bus identifiers
442
secret: bytestring; sent verbatim (over TLS) to client
443
timeout: datetime.timedelta(); How long from last_checked_ok
444
until this client is disabled
445
extended_timeout: extra long timeout when secret has been sent
446
runtime_expansions: Allowed attributes for runtime expansion.
447
expires: datetime.datetime(); time (UTC) when a client will be
448
disabled, or None
449
server_settings: The server_settings dict from main()
201
450
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
451
452
runtime_expansions = ("approval_delay", "approval_duration",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
456
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
459
"interval": "PT2M",
460
"checker": "fping -q -- %%(host)s",
461
"host": "",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
465
"enabled": "True",
466
}
467
468
def timeout_milliseconds(self):
469
"Return the 'timeout' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.timeout)
471
472
def extended_timeout_milliseconds(self):
473
"Return the 'extended_timeout' attribute in milliseconds"
474
return timedelta_to_milliseconds(self.extended_timeout)
475
476
def interval_milliseconds(self):
477
"Return the 'interval' attribute in milliseconds"
478
return timedelta_to_milliseconds(self.interval)
479
480
def approval_delay_milliseconds(self):
481
return timedelta_to_milliseconds(self.approval_delay)
482
483
@staticmethod
484
def config_parser(config):
485
"""Construct a new dict of client settings of this form:
486
{ client_name: {setting_name: value, ...}, ...}
487
with exceptions for any special settings as defined above.
488
NOTE: Must be a pure function. Must return the same result
489
value given the same arguments.
490
"""
491
settings = {}
492
for client_name in config.sections():
493
section = dict(config.items(client_name))
494
client = settings[client_name] = {}
495
496
client["host"] = section["host"]
497
# Reformat values from string types to Python types
498
client["approved_by_default"] = config.getboolean(
499
client_name, "approved_by_default")
500
client["enabled"] = config.getboolean(client_name,
501
"enabled")
502
503
client["fingerprint"] = (section["fingerprint"].upper()
504
.replace(" ", ""))
505
if "secret" in section:
506
client["secret"] = section["secret"].decode("base64")
507
elif "secfile" in section:
508
with open(os.path.expanduser(os.path.expandvars
509
(section["secfile"])),
510
"rb") as secfile:
511
client["secret"] = secfile.read()
512
else:
513
raise TypeError("No secret or secfile for section {0}"
514
.format(section))
515
client["timeout"] = string_to_delta(section["timeout"])
516
client["extended_timeout"] = string_to_delta(
517
section["extended_timeout"])
518
client["interval"] = string_to_delta(section["interval"])
519
client["approval_delay"] = string_to_delta(
520
section["approval_delay"])
521
client["approval_duration"] = string_to_delta(
522
section["approval_duration"])
523
client["checker_command"] = section["checker"]
524
client["last_approval_request"] = None
525
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
527
528
return settings
529
530
def __init__(self, settings, name = None, server_settings=None):
229
531
self.name = name
230
logger.debug(u"Creating client %r", self.name)
532
if server_settings is None:
533
server_settings = {}
534
self.server_settings = server_settings
535
# adding all client settings
536
for setting, value in settings.iteritems():
537
setattr(self, setting, value)
538
539
if self.enabled:
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
544
+ self.timeout)
545
else:
546
self.last_enabled = None
547
self.expires = None
548
549
logger.debug("Creating client %r", self.name)
231
550
# Uppercase and remove spaces from fingerprint for later
232
551
# comparison purposes with return value from the fingerprint()
233
552
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
553
logger.debug(" Fingerprint: %s", self.fingerprint)
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
556
557
# attributes specific for this server instance
252
558
self.checker = None
253
559
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
560
self.disable_initiator_tag = None
255
561
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
562
self.current_checker_command = None
563
self.approved = None
564
self.approvals_pending = 0
565
self.changedstate = (multiprocessing_manager
566
.Condition(multiprocessing_manager
567
.Lock()))
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
570
if not attr.startswith("_")]
571
self.client_structure.append("client_structure")
572
573
for name, t in inspect.getmembers(type(self),
574
lambda obj:
575
isinstance(obj,
576
property)):
577
if not name.startswith("_"):
578
self.client_structure.append(name)
579
580
# Send notice to process children that client state has changed
581
def send_changedstate(self):
582
with self.changedstate:
583
self.changedstate.notify_all()
584
585
def enable(self):
258
586
"""Start this client's checker and timeout hooks"""
587
if getattr(self, "enabled", False):
588
# Already enabled
589
return
590
self.expires = datetime.datetime.utcnow() + self.timeout
591
self.enabled = True
592
self.last_enabled = datetime.datetime.utcnow()
593
self.init_checker()
594
self.send_changedstate()
595
596
def disable(self, quiet=True):
597
"""Disable this client."""
598
if not getattr(self, "enabled", False):
599
return False
600
if not quiet:
601
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
603
gobject.source_remove(self.disable_initiator_tag)
604
self.disable_initiator_tag = None
605
self.expires = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
607
gobject.source_remove(self.checker_initiator_tag)
608
self.checker_initiator_tag = None
609
self.stop_checker()
610
self.enabled = False
611
if not quiet:
612
self.send_changedstate()
613
# Do not run this again if called by a gobject.timeout_add
614
return False
615
616
def __del__(self):
617
self.disable()
618
619
def init_checker(self):
259
620
# Schedule a new checker to be started an 'interval' from now,
260
621
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
622
if self.checker_initiator_tag is not None:
623
gobject.source_remove(self.checker_initiator_tag)
624
self.checker_initiator_tag = (gobject.timeout_add
625
(self.interval_milliseconds(),
626
self.start_checker))
627
# Schedule a disable() when 'timeout' has passed
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
self.disable_initiator_tag = (gobject.timeout_add
631
(self.timeout_milliseconds(),
632
self.disable))
264
633
# Also start a new checker *right now*.
265
634
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
279
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
284
gobject.source_remove(self.checker_initiator_tag)
285
self.checker_initiator_tag = None
286
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
289
# Do not run this again if called by a gobject.timeout_add
290
return False
291
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
635
636
def checker_callback(self, pid, condition, command):
295
637
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
638
self.checker_callback_tag = None
298
639
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
309
logger.warning(u"Checker for %(name)s crashed?",
640
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
642
if self.last_checker_status == 0:
643
logger.info("Checker for %(name)s succeeded",
644
vars(self))
645
self.checked_ok()
646
else:
647
logger.info("Checker for %(name)s failed",
648
vars(self))
649
else:
650
self.last_checker_status = -1
651
logger.warning("Checker for %(name)s crashed?",
310
652
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
653
654
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
656
self.last_checked_ok = datetime.datetime.utcnow()
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
662
if timeout is None:
663
timeout = self.timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = (gobject.timeout_add
669
(timedelta_to_milliseconds
670
(timeout), self.disable))
671
self.expires = datetime.datetime.utcnow() + timeout
672
673
def need_approval(self):
674
self.last_approval_request = datetime.datetime.utcnow()
675
314
676
def start_checker(self):
315
677
"""Start a new checker subprocess if one is not running.
678
316
679
If a checker already exists, leave it running and do
317
680
nothing."""
318
681
# The reason for not killing a running checker is that if we
319
# did that, then if a checker (for some reason) started
320
# running slowly and taking more than 'interval' time, the
321
# client would inevitably timeout, since no checker would get
322
# a chance to run to completion. If we instead leave running
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
323
686
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
687
# than 'timeout' for the client to be disabled, which is as it
688
# should be.
689
690
# If a checker exists, make sure it is not a zombie
691
try:
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except (AttributeError, OSError) as error:
694
if (isinstance(error, OSError)
695
and error.errno != errno.ECHILD):
696
raise error
697
else:
698
if pid:
699
logger.warning("Checker was a zombie")
700
gobject.source_remove(self.checker_callback_tag)
701
self.checker_callback(pid, status,
702
self.current_checker_command)
703
# Start a new checker if needed
326
704
if self.checker is None:
327
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
330
except TypeError:
331
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
335
try:
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
340
return True # Try again later
341
try:
342
logger.info(u"Starting checker %r for %s",
705
# Escape attributes for the shell
706
escaped_attrs = dict(
707
(attr, re.escape(unicode(getattr(self, attr))))
708
for attr in
709
self.runtime_expansions)
710
try:
711
command = self.checker_command % escaped_attrs
712
except TypeError as error:
713
logger.error('Could not format string "%s"',
714
self.checker_command, exc_info=error)
715
return True # Try again later
716
self.current_checker_command = command
717
try:
718
logger.info("Starting checker %r for %s",
343
719
command, self.name)
344
720
# We don't need to redirect stdout and stderr, since
345
721
# in normal mode, that is already done by daemon(),
346
722
# and in debug mode we don't want to. (Stdin is
347
723
# always replaced by /dev/null.)
724
# The exception is when not debugging but nevertheless
725
# running in the foreground; use the previously
726
# created wnull.
727
popen_args = {}
728
if (not self.server_settings["debug"]
729
and self.server_settings["foreground"]):
730
popen_args.update({"stdout": wnull,
731
"stderr": wnull })
348
732
self.checker = subprocess.Popen(command,
349
733
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
356
error)
734
shell=True, cwd="/",
735
**popen_args)
736
except OSError as error:
737
logger.error("Failed to start subprocess",
738
exc_info=error)
739
return True
740
self.checker_callback_tag = (gobject.child_watch_add
741
(self.checker.pid,
742
self.checker_callback,
743
data=command))
744
# The checker may have completed before the gobject
745
# watch was added. Check for this.
746
try:
747
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
748
except OSError as error:
749
if error.errno == errno.ECHILD:
750
# This should never happen
751
logger.error("Child process vanished",
752
exc_info=error)
753
return True
754
raise
755
if pid:
756
gobject.source_remove(self.checker_callback_tag)
757
self.checker_callback(pid, status, command)
357
758
# Re-run this periodically if run by gobject.timeout_add
358
759
return True
760
359
761
def stop_checker(self):
360
762
"""Force the checker process, if any, to stop."""
361
763
if self.checker_callback_tag:
363
765
self.checker_callback_tag = None
364
766
if getattr(self, "checker", None) is None:
365
767
return
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
768
logger.debug("Stopping checker for %(name)s", vars(self))
367
769
try:
368
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
770
self.checker.terminate()
771
#time.sleep(0.5)
370
772
#if self.checker.poll() is None:
371
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
773
# self.checker.kill()
774
except OSError as error:
373
775
if error.errno != errno.ESRCH: # No such process
374
776
raise
375
777
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
778
779
780
def dbus_service_property(dbus_interface, signature="v",
781
access="readwrite", byte_arrays=False):
782
"""Decorators for marking methods of a DBusObjectWithProperties to
783
become properties on the D-Bus.
784
785
The decorated method will be called with no arguments by "Get"
786
and with one argument by "Set".
787
788
The parameters, where they are supported, are the same as
789
dbus.service.method, except there is only "signature", since the
790
type from Get() and the type sent to Set() is the same.
791
"""
792
# Encoding deeply encoded byte arrays is not supported yet by the
793
# "Set" method, so we fail early here:
794
if byte_arrays and signature != "ay":
795
raise ValueError("Byte arrays not supported for non-'ay'"
796
" signature {0!r}".format(signature))
797
def decorator(func):
798
func._dbus_is_property = True
799
func._dbus_interface = dbus_interface
800
func._dbus_signature = signature
801
func._dbus_access = access
802
func._dbus_name = func.__name__
803
if func._dbus_name.endswith("_dbus_property"):
804
func._dbus_name = func._dbus_name[:-14]
805
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
806
return func
807
return decorator
808
809
810
def dbus_interface_annotations(dbus_interface):
811
"""Decorator for marking functions returning interface annotations
812
813
Usage:
814
815
@dbus_interface_annotations("org.example.Interface")
816
def _foo(self): # Function name does not matter
817
return {"org.freedesktop.DBus.Deprecated": "true",
818
"org.freedesktop.DBus.Property.EmitsChangedSignal":
819
"false"}
820
"""
821
def decorator(func):
822
func._dbus_is_interface = True
823
func._dbus_interface = dbus_interface
824
func._dbus_name = dbus_interface
825
return func
826
return decorator
827
828
829
def dbus_annotations(annotations):
830
"""Decorator to annotate D-Bus methods, signals or properties
831
Usage:
832
833
@dbus_service_property("org.example.Interface", signature="b",
834
access="r")
835
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
836
"org.freedesktop.DBus.Property."
837
"EmitsChangedSignal": "false"})
838
def Property_dbus_property(self):
839
return dbus.Boolean(False)
840
"""
841
def decorator(func):
842
func._dbus_annotations = annotations
843
return func
844
return decorator
845
846
847
class DBusPropertyException(dbus.exceptions.DBusException):
848
"""A base class for D-Bus property-related exceptions
849
"""
850
def __unicode__(self):
851
return unicode(str(self))
852
853
854
class DBusPropertyAccessException(DBusPropertyException):
855
"""A property's access permissions disallows an operation.
856
"""
857
pass
858
859
860
class DBusPropertyNotFound(DBusPropertyException):
861
"""An attempt was made to access a non-existing property.
862
"""
863
pass
864
865
866
class DBusObjectWithProperties(dbus.service.Object):
867
"""A D-Bus object with properties.
868
869
Classes inheriting from this can use the dbus_service_property
870
decorator to expose methods as D-Bus properties. It exposes the
871
standard Get(), Set(), and GetAll() methods on the D-Bus.
872
"""
873
874
@staticmethod
875
def _is_dbus_thing(thing):
876
"""Returns a function testing if an attribute is a D-Bus thing
877
878
If called like _is_dbus_thing("method") it returns a function
879
suitable for use as predicate to inspect.getmembers().
880
"""
881
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
882
False)
883
884
def _get_all_dbus_things(self, thing):
885
"""Returns a generator of (name, attribute) pairs
886
"""
887
return ((getattr(athing.__get__(self), "_dbus_name",
888
name),
889
athing.__get__(self))
890
for cls in self.__class__.__mro__
891
for name, athing in
892
inspect.getmembers(cls,
893
self._is_dbus_thing(thing)))
894
895
def _get_dbus_property(self, interface_name, property_name):
896
"""Returns a bound method if one exists which is a D-Bus
897
property with the specified name and interface.
898
"""
899
for cls in self.__class__.__mro__:
900
for name, value in (inspect.getmembers
901
(cls,
902
self._is_dbus_thing("property"))):
903
if (value._dbus_name == property_name
904
and value._dbus_interface == interface_name):
905
return value.__get__(self)
906
907
# No such property
908
raise DBusPropertyNotFound(self.dbus_object_path + ":"
909
+ interface_name + "."
910
+ property_name)
911
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
913
out_signature="v")
914
def Get(self, interface_name, property_name):
915
"""Standard D-Bus property Get() method, see D-Bus standard.
916
"""
917
prop = self._get_dbus_property(interface_name, property_name)
918
if prop._dbus_access == "write":
919
raise DBusPropertyAccessException(property_name)
920
value = prop()
921
if not hasattr(value, "variant_level"):
922
return value
923
return type(value)(value, variant_level=value.variant_level+1)
924
925
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
926
def Set(self, interface_name, property_name, value):
927
"""Standard D-Bus property Set() method, see D-Bus standard.
928
"""
929
prop = self._get_dbus_property(interface_name, property_name)
930
if prop._dbus_access == "read":
931
raise DBusPropertyAccessException(property_name)
932
if prop._dbus_get_args_options["byte_arrays"]:
933
# The byte_arrays option is not supported yet on
934
# signatures other than "ay".
935
if prop._dbus_signature != "ay":
936
raise ValueError
937
value = dbus.ByteArray(b''.join(chr(byte)
938
for byte in value))
939
prop(value)
940
941
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
942
out_signature="a{sv}")
943
def GetAll(self, interface_name):
944
"""Standard D-Bus property GetAll() method, see D-Bus
945
standard.
946
947
Note: Will not include properties with access="write".
948
"""
949
properties = {}
950
for name, prop in self._get_all_dbus_things("property"):
951
if (interface_name
952
and interface_name != prop._dbus_interface):
953
# Interface non-empty but did not match
954
continue
955
# Ignore write-only properties
956
if prop._dbus_access == "write":
957
continue
958
value = prop()
959
if not hasattr(value, "variant_level"):
960
properties[name] = value
961
continue
962
properties[name] = type(value)(value, variant_level=
963
value.variant_level+1)
964
return dbus.Dictionary(properties, signature="sv")
965
966
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
967
out_signature="s",
968
path_keyword='object_path',
969
connection_keyword='connection')
970
def Introspect(self, object_path, connection):
971
"""Overloading of standard D-Bus method.
972
973
Inserts property tags and interface annotation tags.
974
"""
975
xmlstring = dbus.service.Object.Introspect(self, object_path,
976
connection)
977
try:
978
document = xml.dom.minidom.parseString(xmlstring)
979
def make_tag(document, name, prop):
980
e = document.createElement("property")
981
e.setAttribute("name", name)
982
e.setAttribute("type", prop._dbus_signature)
983
e.setAttribute("access", prop._dbus_access)
984
return e
985
for if_tag in document.getElementsByTagName("interface"):
986
# Add property tags
987
for tag in (make_tag(document, name, prop)
988
for name, prop
989
in self._get_all_dbus_things("property")
990
if prop._dbus_interface
991
== if_tag.getAttribute("name")):
992
if_tag.appendChild(tag)
993
# Add annotation tags
994
for typ in ("method", "signal", "property"):
995
for tag in if_tag.getElementsByTagName(typ):
996
annots = dict()
997
for name, prop in (self.
998
_get_all_dbus_things(typ)):
999
if (name == tag.getAttribute("name")
1000
and prop._dbus_interface
1001
== if_tag.getAttribute("name")):
1002
annots.update(getattr
1003
(prop,
1004
"_dbus_annotations",
1005
{}))
1006
for name, value in annots.iteritems():
1007
ann_tag = document.createElement(
1008
"annotation")
1009
ann_tag.setAttribute("name", name)
1010
ann_tag.setAttribute("value", value)
1011
tag.appendChild(ann_tag)
1012
# Add interface annotation tags
1013
for annotation, value in dict(
1014
itertools.chain.from_iterable(
1015
annotations().iteritems()
1016
for name, annotations in
1017
self._get_all_dbus_things("interface")
1018
if name == if_tag.getAttribute("name")
1019
)).iteritems():
1020
ann_tag = document.createElement("annotation")
1021
ann_tag.setAttribute("name", annotation)
1022
ann_tag.setAttribute("value", value)
1023
if_tag.appendChild(ann_tag)
1024
# Add the names to the return values for the
1025
# "org.freedesktop.DBus.Properties" methods
1026
if (if_tag.getAttribute("name")
1027
== "org.freedesktop.DBus.Properties"):
1028
for cn in if_tag.getElementsByTagName("method"):
1029
if cn.getAttribute("name") == "Get":
1030
for arg in cn.getElementsByTagName("arg"):
1031
if (arg.getAttribute("direction")
1032
== "out"):
1033
arg.setAttribute("name", "value")
1034
elif cn.getAttribute("name") == "GetAll":
1035
for arg in cn.getElementsByTagName("arg"):
1036
if (arg.getAttribute("direction")
1037
== "out"):
1038
arg.setAttribute("name", "props")
1039
xmlstring = document.toxml("utf-8")
1040
document.unlink()
1041
except (AttributeError, xml.dom.DOMException,
1042
xml.parsers.expat.ExpatError) as error:
1043
logger.error("Failed to override Introspection method",
1044
exc_info=error)
1045
return xmlstring
1046
1047
1048
def datetime_to_dbus(dt, variant_level=0):
1049
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1050
if dt is None:
1051
return dbus.String("", variant_level = variant_level)
1052
return dbus.String(dt.isoformat(),
1053
variant_level=variant_level)
1054
1055
1056
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
"""A class decorator; applied to a subclass of
1058
dbus.service.Object, it will add alternate D-Bus attributes with
1059
interface names according to the "alt_interface_names" mapping.
1060
Usage:
1061
1062
@alternate_dbus_interfaces({"org.example.Interface":
1063
"net.example.AlternateInterface"})
1064
class SampleDBusObject(dbus.service.Object):
1065
@dbus.service.method("org.example.Interface")
1066
def SampleDBusMethod():
1067
pass
1068
1069
The above "SampleDBusMethod" on "SampleDBusObject" will be
1070
reachable via two interfaces: "org.example.Interface" and
1071
"net.example.AlternateInterface", the latter of which will have
1072
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1073
"true", unless "deprecate" is passed with a False value.
1074
1075
This works for methods and signals, and also for D-Bus properties
1076
(from DBusObjectWithProperties) and interfaces (from the
1077
dbus_interface_annotations decorator).
1078
"""
1079
def wrapper(cls):
1080
for orig_interface_name, alt_interface_name in (
1081
alt_interface_names.iteritems()):
1082
attr = {}
1083
interface_names = set()
1084
# Go though all attributes of the class
1085
for attrname, attribute in inspect.getmembers(cls):
1086
# Ignore non-D-Bus attributes, and D-Bus attributes
1087
# with the wrong interface name
1088
if (not hasattr(attribute, "_dbus_interface")
1089
or not attribute._dbus_interface
1090
.startswith(orig_interface_name)):
1091
continue
1092
# Create an alternate D-Bus interface name based on
1093
# the current name
1094
alt_interface = (attribute._dbus_interface
1095
.replace(orig_interface_name,
1096
alt_interface_name))
1097
interface_names.add(alt_interface)
1098
# Is this a D-Bus signal?
1099
if getattr(attribute, "_dbus_is_signal", False):
1100
# Extract the original non-method undecorated
1101
# function by black magic
1102
nonmethod_func = (dict(
1103
zip(attribute.func_code.co_freevars,
1104
attribute.__closure__))["func"]
1105
.cell_contents)
1106
# Create a new, but exactly alike, function
1107
# object, and decorate it to be a new D-Bus signal
1108
# with the alternate D-Bus interface name
1109
new_function = (dbus.service.signal
1110
(alt_interface,
1111
attribute._dbus_signature)
1112
(types.FunctionType(
1113
nonmethod_func.func_code,
1114
nonmethod_func.func_globals,
1115
nonmethod_func.func_name,
1116
nonmethod_func.func_defaults,
1117
nonmethod_func.func_closure)))
1118
# Copy annotations, if any
1119
try:
1120
new_function._dbus_annotations = (
1121
dict(attribute._dbus_annotations))
1122
except AttributeError:
1123
pass
1124
# Define a creator of a function to call both the
1125
# original and alternate functions, so both the
1126
# original and alternate signals gets sent when
1127
# the function is called
1128
def fixscope(func1, func2):
1129
"""This function is a scope container to pass
1130
func1 and func2 to the "call_both" function
1131
outside of its arguments"""
1132
def call_both(*args, **kwargs):
1133
"""This function will emit two D-Bus
1134
signals by calling func1 and func2"""
1135
func1(*args, **kwargs)
1136
func2(*args, **kwargs)
1137
return call_both
1138
# Create the "call_both" function and add it to
1139
# the class
1140
attr[attrname] = fixscope(attribute, new_function)
1141
# Is this a D-Bus method?
1142
elif getattr(attribute, "_dbus_is_method", False):
1143
# Create a new, but exactly alike, function
1144
# object. Decorate it to be a new D-Bus method
1145
# with the alternate D-Bus interface name. Add it
1146
# to the class.
1147
attr[attrname] = (dbus.service.method
1148
(alt_interface,
1149
attribute._dbus_in_signature,
1150
attribute._dbus_out_signature)
1151
(types.FunctionType
1152
(attribute.func_code,
1153
attribute.func_globals,
1154
attribute.func_name,
1155
attribute.func_defaults,
1156
attribute.func_closure)))
1157
# Copy annotations, if any
1158
try:
1159
attr[attrname]._dbus_annotations = (
1160
dict(attribute._dbus_annotations))
1161
except AttributeError:
1162
pass
1163
# Is this a D-Bus property?
1164
elif getattr(attribute, "_dbus_is_property", False):
1165
# Create a new, but exactly alike, function
1166
# object, and decorate it to be a new D-Bus
1167
# property with the alternate D-Bus interface
1168
# name. Add it to the class.
1169
attr[attrname] = (dbus_service_property
1170
(alt_interface,
1171
attribute._dbus_signature,
1172
attribute._dbus_access,
1173
attribute
1174
._dbus_get_args_options
1175
["byte_arrays"])
1176
(types.FunctionType
1177
(attribute.func_code,
1178
attribute.func_globals,
1179
attribute.func_name,
1180
attribute.func_defaults,
1181
attribute.func_closure)))
1182
# Copy annotations, if any
1183
try:
1184
attr[attrname]._dbus_annotations = (
1185
dict(attribute._dbus_annotations))
1186
except AttributeError:
1187
pass
1188
# Is this a D-Bus interface?
1189
elif getattr(attribute, "_dbus_is_interface", False):
1190
# Create a new, but exactly alike, function
1191
# object. Decorate it to be a new D-Bus interface
1192
# with the alternate D-Bus interface name. Add it
1193
# to the class.
1194
attr[attrname] = (dbus_interface_annotations
1195
(alt_interface)
1196
(types.FunctionType
1197
(attribute.func_code,
1198
attribute.func_globals,
1199
attribute.func_name,
1200
attribute.func_defaults,
1201
attribute.func_closure)))
1202
if deprecate:
1203
# Deprecate all alternate interfaces
1204
iname="_AlternateDBusNames_interface_annotation{0}"
1205
for interface_name in interface_names:
1206
@dbus_interface_annotations(interface_name)
1207
def func(self):
1208
return { "org.freedesktop.DBus.Deprecated":
1209
"true" }
1210
# Find an unused name
1211
for aname in (iname.format(i)
1212
for i in itertools.count()):
1213
if aname not in attr:
1214
attr[aname] = func
1215
break
1216
if interface_names:
1217
# Replace the class with a new subclass of it with
1218
# methods, signals, etc. as created above.
1219
cls = type(b"{0}Alternate".format(cls.__name__),
1220
(cls,), attr)
1221
return cls
1222
return wrapper
1223
1224
1225
@alternate_dbus_interfaces({"se.recompile.Mandos":
1226
"se.bsnet.fukt.Mandos"})
1227
class ClientDBus(Client, DBusObjectWithProperties):
1228
"""A Client class using D-Bus
1229
1230
Attributes:
1231
dbus_object_path: dbus.ObjectPath
1232
bus: dbus.SystemBus()
1233
"""
1234
1235
runtime_expansions = (Client.runtime_expansions
1236
+ ("dbus_object_path",))
1237
1238
# dbus.service.Object doesn't use super(), so we can't either.
1239
1240
def __init__(self, bus = None, *args, **kwargs):
1241
self.bus = bus
1242
Client.__init__(self, *args, **kwargs)
1243
# Only now, when this client is initialized, can it show up on
1244
# the D-Bus
1245
client_object_name = unicode(self.name).translate(
1246
{ord("."): ord("_"),
1247
ord("-"): ord("_")})
1248
self.dbus_object_path = (dbus.ObjectPath
1249
("/clients/" + client_object_name))
1250
DBusObjectWithProperties.__init__(self, self.bus,
1251
self.dbus_object_path)
1252
1253
def notifychangeproperty(transform_func,
1254
dbus_name, type_func=lambda x: x,
1255
variant_level=1):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1258
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1265
"""
1266
attrname = "_{0}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1272
dbus_value = transform_func(type_func(value),
1273
variant_level
1274
=variant_level)
1275
self.PropertyChanged(dbus.String(dbus_name),
1276
dbus_value)
1277
setattr(self, attrname, value)
1278
1279
return property(lambda self: getattr(self, attrname), setter)
1280
1281
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1282
approvals_pending = notifychangeproperty(dbus.Boolean,
1283
"ApprovalPending",
1284
type_func = bool)
1285
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1286
last_enabled = notifychangeproperty(datetime_to_dbus,
1287
"LastEnabled")
1288
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1289
type_func = lambda checker:
1290
checker is not None)
1291
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1292
"LastCheckedOK")
1293
last_checker_status = notifychangeproperty(dbus.Int16,
1294
"LastCheckerStatus")
1295
last_approval_request = notifychangeproperty(
1296
datetime_to_dbus, "LastApprovalRequest")
1297
approved_by_default = notifychangeproperty(dbus.Boolean,
1298
"ApprovedByDefault")
1299
approval_delay = notifychangeproperty(dbus.UInt64,
1300
"ApprovalDelay",
1301
type_func =
1302
timedelta_to_milliseconds)
1303
approval_duration = notifychangeproperty(
1304
dbus.UInt64, "ApprovalDuration",
1305
type_func = timedelta_to_milliseconds)
1306
host = notifychangeproperty(dbus.String, "Host")
1307
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1308
type_func =
1309
timedelta_to_milliseconds)
1310
extended_timeout = notifychangeproperty(
1311
dbus.UInt64, "ExtendedTimeout",
1312
type_func = timedelta_to_milliseconds)
1313
interval = notifychangeproperty(dbus.UInt64,
1314
"Interval",
1315
type_func =
1316
timedelta_to_milliseconds)
1317
checker_command = notifychangeproperty(dbus.String, "Checker")
1318
1319
del notifychangeproperty
1320
1321
def __del__(self, *args, **kwargs):
1322
try:
1323
self.remove_from_connection()
1324
except LookupError:
1325
pass
1326
if hasattr(DBusObjectWithProperties, "__del__"):
1327
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1328
Client.__del__(self, *args, **kwargs)
1329
1330
def checker_callback(self, pid, condition, command,
1331
*args, **kwargs):
1332
self.checker_callback_tag = None
1333
self.checker = None
1334
if os.WIFEXITED(condition):
1335
exitstatus = os.WEXITSTATUS(condition)
1336
# Emit D-Bus signal
1337
self.CheckerCompleted(dbus.Int16(exitstatus),
1338
dbus.Int64(condition),
1339
dbus.String(command))
1340
else:
1341
# Emit D-Bus signal
1342
self.CheckerCompleted(dbus.Int16(-1),
1343
dbus.Int64(condition),
1344
dbus.String(command))
1345
1346
return Client.checker_callback(self, pid, condition, command,
1347
*args, **kwargs)
1348
1349
def start_checker(self, *args, **kwargs):
1350
old_checker = self.checker
1351
if self.checker is not None:
1352
old_checker_pid = self.checker.pid
1353
else:
1354
old_checker_pid = None
1355
r = Client.start_checker(self, *args, **kwargs)
1356
# Only if new checker process was started
1357
if (self.checker is not None
1358
and old_checker_pid != self.checker.pid):
1359
# Emit D-Bus signal
1360
self.CheckerStarted(self.current_checker_command)
1361
return r
1362
1363
def _reset_approved(self):
1364
self.approved = None
1365
return False
1366
1367
def approve(self, value=True):
1368
self.approved = value
1369
gobject.timeout_add(timedelta_to_milliseconds
1370
(self.approval_duration),
1371
self._reset_approved)
1372
self.send_changedstate()
1373
1374
## D-Bus methods, signals & properties
1375
_interface = "se.recompile.Mandos.Client"
1376
1377
## Interfaces
1378
1379
@dbus_interface_annotations(_interface)
1380
def _foo(self):
1381
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1382
"false"}
1383
1384
## Signals
1385
1386
# CheckerCompleted - signal
1387
@dbus.service.signal(_interface, signature="nxs")
1388
def CheckerCompleted(self, exitcode, waitstatus, command):
1389
"D-Bus signal"
1390
pass
1391
1392
# CheckerStarted - signal
1393
@dbus.service.signal(_interface, signature="s")
1394
def CheckerStarted(self, command):
1395
"D-Bus signal"
1396
pass
1397
1398
# PropertyChanged - signal
1399
@dbus.service.signal(_interface, signature="sv")
1400
def PropertyChanged(self, property, value):
1401
"D-Bus signal"
1402
pass
1403
1404
# GotSecret - signal
1405
@dbus.service.signal(_interface)
1406
def GotSecret(self):
1407
"""D-Bus signal
1408
Is sent after a successful transfer of secret from the Mandos
1409
server to mandos-client
1410
"""
1411
pass
1412
1413
# Rejected - signal
1414
@dbus.service.signal(_interface, signature="s")
1415
def Rejected(self, reason):
1416
"D-Bus signal"
1417
pass
1418
1419
# NeedApproval - signal
1420
@dbus.service.signal(_interface, signature="tb")
1421
def NeedApproval(self, timeout, default):
1422
"D-Bus signal"
1423
return self.need_approval()
1424
1425
## Methods
1426
1427
# Approve - method
1428
@dbus.service.method(_interface, in_signature="b")
1429
def Approve(self, value):
1430
self.approve(value)
1431
1432
# CheckedOK - method
1433
@dbus.service.method(_interface)
1434
def CheckedOK(self):
1435
self.checked_ok()
1436
1437
# Enable - method
1438
@dbus.service.method(_interface)
1439
def Enable(self):
1440
"D-Bus method"
1441
self.enable()
1442
1443
# StartChecker - method
1444
@dbus.service.method(_interface)
1445
def StartChecker(self):
1446
"D-Bus method"
1447
self.start_checker()
1448
1449
# Disable - method
1450
@dbus.service.method(_interface)
1451
def Disable(self):
1452
"D-Bus method"
1453
self.disable()
1454
1455
# StopChecker - method
1456
@dbus.service.method(_interface)
1457
def StopChecker(self):
1458
self.stop_checker()
1459
1460
## Properties
1461
1462
# ApprovalPending - property
1463
@dbus_service_property(_interface, signature="b", access="read")
1464
def ApprovalPending_dbus_property(self):
1465
return dbus.Boolean(bool(self.approvals_pending))
1466
1467
# ApprovedByDefault - property
1468
@dbus_service_property(_interface, signature="b",
1469
access="readwrite")
1470
def ApprovedByDefault_dbus_property(self, value=None):
1471
if value is None: # get
1472
return dbus.Boolean(self.approved_by_default)
1473
self.approved_by_default = bool(value)
1474
1475
# ApprovalDelay - property
1476
@dbus_service_property(_interface, signature="t",
1477
access="readwrite")
1478
def ApprovalDelay_dbus_property(self, value=None):
1479
if value is None: # get
1480
return dbus.UInt64(self.approval_delay_milliseconds())
1481
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1482
1483
# ApprovalDuration - property
1484
@dbus_service_property(_interface, signature="t",
1485
access="readwrite")
1486
def ApprovalDuration_dbus_property(self, value=None):
1487
if value is None: # get
1488
return dbus.UInt64(timedelta_to_milliseconds(
1489
self.approval_duration))
1490
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1491
1492
# Name - property
1493
@dbus_service_property(_interface, signature="s", access="read")
1494
def Name_dbus_property(self):
1495
return dbus.String(self.name)
1496
1497
# Fingerprint - property
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Fingerprint_dbus_property(self):
1500
return dbus.String(self.fingerprint)
1501
1502
# Host - property
1503
@dbus_service_property(_interface, signature="s",
1504
access="readwrite")
1505
def Host_dbus_property(self, value=None):
1506
if value is None: # get
1507
return dbus.String(self.host)
1508
self.host = unicode(value)
1509
1510
# Created - property
1511
@dbus_service_property(_interface, signature="s", access="read")
1512
def Created_dbus_property(self):
1513
return datetime_to_dbus(self.created)
1514
1515
# LastEnabled - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def LastEnabled_dbus_property(self):
1518
return datetime_to_dbus(self.last_enabled)
1519
1520
# Enabled - property
1521
@dbus_service_property(_interface, signature="b",
1522
access="readwrite")
1523
def Enabled_dbus_property(self, value=None):
1524
if value is None: # get
1525
return dbus.Boolean(self.enabled)
1526
if value:
1527
self.enable()
1528
else:
1529
self.disable()
1530
1531
# LastCheckedOK - property
1532
@dbus_service_property(_interface, signature="s",
1533
access="readwrite")
1534
def LastCheckedOK_dbus_property(self, value=None):
1535
if value is not None:
1536
self.checked_ok()
1537
return
1538
return datetime_to_dbus(self.last_checked_ok)
1539
1540
# LastCheckerStatus - property
1541
@dbus_service_property(_interface, signature="n",
1542
access="read")
1543
def LastCheckerStatus_dbus_property(self):
1544
return dbus.Int16(self.last_checker_status)
1545
1546
# Expires - property
1547
@dbus_service_property(_interface, signature="s", access="read")
1548
def Expires_dbus_property(self):
1549
return datetime_to_dbus(self.expires)
1550
1551
# LastApprovalRequest - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def LastApprovalRequest_dbus_property(self):
1554
return datetime_to_dbus(self.last_approval_request)
1555
1556
# Timeout - property
1557
@dbus_service_property(_interface, signature="t",
1558
access="readwrite")
1559
def Timeout_dbus_property(self, value=None):
1560
if value is None: # get
1561
return dbus.UInt64(self.timeout_milliseconds())
1562
old_timeout = self.timeout
1563
self.timeout = datetime.timedelta(0, 0, 0, value)
1564
# Reschedule disabling
1565
if self.enabled:
1566
now = datetime.datetime.utcnow()
1567
self.expires += self.timeout - old_timeout
1568
if self.expires <= now:
1569
# The timeout has passed
1570
self.disable()
1571
else:
1572
if (getattr(self, "disable_initiator_tag", None)
1573
is None):
1574
return
1575
gobject.source_remove(self.disable_initiator_tag)
1576
self.disable_initiator_tag = (
1577
gobject.timeout_add(
1578
timedelta_to_milliseconds(self.expires - now),
1579
self.disable))
1580
1581
# ExtendedTimeout - property
1582
@dbus_service_property(_interface, signature="t",
1583
access="readwrite")
1584
def ExtendedTimeout_dbus_property(self, value=None):
1585
if value is None: # get
1586
return dbus.UInt64(self.extended_timeout_milliseconds())
1587
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
1589
# Interval - property
1590
@dbus_service_property(_interface, signature="t",
1591
access="readwrite")
1592
def Interval_dbus_property(self, value=None):
1593
if value is None: # get
1594
return dbus.UInt64(self.interval_milliseconds())
1595
self.interval = datetime.timedelta(0, 0, 0, value)
1596
if getattr(self, "checker_initiator_tag", None) is None:
1597
return
1598
if self.enabled:
1599
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1604
1605
# Checker - property
1606
@dbus_service_property(_interface, signature="s",
1607
access="readwrite")
1608
def Checker_dbus_property(self, value=None):
1609
if value is None: # get
1610
return dbus.String(self.checker_command)
1611
self.checker_command = unicode(value)
1612
1613
# CheckerRunning - property
1614
@dbus_service_property(_interface, signature="b",
1615
access="readwrite")
1616
def CheckerRunning_dbus_property(self, value=None):
1617
if value is None: # get
1618
return dbus.Boolean(self.checker is not None)
1619
if value:
1620
self.start_checker()
1621
else:
1622
self.stop_checker()
1623
1624
# ObjectPath - property
1625
@dbus_service_property(_interface, signature="o", access="read")
1626
def ObjectPath_dbus_property(self):
1627
return self.dbus_object_path # is already a dbus.ObjectPath
1628
1629
# Secret = property
1630
@dbus_service_property(_interface, signature="ay",
1631
access="write", byte_arrays=True)
1632
def Secret_dbus_property(self, value):
1633
self.secret = str(value)
1634
1635
del _interface
1636
1637
1638
class ProxyClient(object):
1639
def __init__(self, child_pipe, fpr, address):
1640
self._pipe = child_pipe
1641
self._pipe.send(('init', fpr, address))
1642
if not self._pipe.recv():
1643
raise KeyError()
1644
1645
def __getattribute__(self, name):
1646
if name == '_pipe':
1647
return super(ProxyClient, self).__getattribute__(name)
1648
self._pipe.send(('getattr', name))
1649
data = self._pipe.recv()
1650
if data[0] == 'data':
1651
return data[1]
1652
if data[0] == 'function':
1653
def func(*args, **kwargs):
1654
self._pipe.send(('funcall', name, args, kwargs))
1655
return self._pipe.recv()[1]
1656
return func
1657
1658
def __setattr__(self, name, value):
1659
if name == '_pipe':
1660
return super(ProxyClient, self).__setattr__(name, value)
1661
self._pipe.send(('setattr', name, value))
1662
1663
1664
class ClientHandler(socketserver.BaseRequestHandler, object):
1665
"""A class to handle client connections.
1666
1667
Instantiated once for each connection to handle it.
442
1668
Note: This will run in its own forked process."""
443
1669
444
1670
def handle(self):
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1671
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
logger.info("TCP connection from: %s",
1673
unicode(self.client_address))
1674
logger.debug("Pipe FD: %d",
1675
self.server.child_pipe.fileno())
1676
1677
session = (gnutls.connection
1678
.ClientSession(self.request,
1679
gnutls.connection
1680
.X509Credentials()))
1681
1682
# Note: gnutls.connection.X509Credentials is really a
1683
# generic GnuTLS certificate credentials object so long as
1684
# no X.509 keys are added to it. Therefore, we can use it
1685
# here despite using OpenPGP certificates.
1686
1687
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
# "+AES-256-CBC", "+SHA1",
1689
# "+COMP-NULL", "+CTYPE-OPENPGP",
1690
# "+DHE-DSS"))
1691
# Use a fallback default, since this MUST be set.
1692
priority = self.server.gnutls_priority
1693
if priority is None:
1694
priority = "NORMAL"
1695
(gnutls.library.functions
1696
.gnutls_priority_set_direct(session._c_object,
1697
priority, None))
1698
1699
# Start communication using the Mandos protocol
1700
# Get protocol number
1701
line = self.request.makefile().readline()
1702
logger.debug("Protocol version: %r", line)
1703
try:
1704
if int(line.strip().split()[0]) > 1:
1705
raise RuntimeError
1706
except (ValueError, IndexError, RuntimeError) as error:
1707
logger.error("Unknown protocol version: %s", error)
1708
return
1709
1710
# Start GnuTLS connection
1711
try:
1712
session.handshake()
1713
except gnutls.errors.GNUTLSError as error:
1714
logger.warning("Handshake failed: %s", error)
1715
# Do not run session.bye() here: the session is not
1716
# established. Just abandon the request.
1717
return
1718
logger.debug("Handshake succeeded")
1719
1720
approval_required = False
1721
try:
1722
try:
1723
fpr = self.fingerprint(self.peer_certificate
1724
(session))
1725
except (TypeError,
1726
gnutls.errors.GNUTLSError) as error:
1727
logger.warning("Bad certificate: %s", error)
1728
return
1729
logger.debug("Fingerprint: %s", fpr)
1730
1731
try:
1732
client = ProxyClient(child_pipe, fpr,
1733
self.client_address)
1734
except KeyError:
1735
return
1736
1737
if client.approval_delay:
1738
delay = client.approval_delay
1739
client.approvals_pending += 1
1740
approval_required = True
1741
1742
while True:
1743
if not client.enabled:
1744
logger.info("Client %s is disabled",
1745
client.name)
1746
if self.server.use_dbus:
1747
# Emit D-Bus signal
1748
client.Rejected("Disabled")
1749
return
1750
1751
if client.approved or not client.approval_delay:
1752
#We are approved or approval is disabled
1753
break
1754
elif client.approved is None:
1755
logger.info("Client %s needs approval",
1756
client.name)
1757
if self.server.use_dbus:
1758
# Emit D-Bus signal
1759
client.NeedApproval(
1760
client.approval_delay_milliseconds(),
1761
client.approved_by_default)
1762
else:
1763
logger.warning("Client %s was not approved",
1764
client.name)
1765
if self.server.use_dbus:
1766
# Emit D-Bus signal
1767
client.Rejected("Denied")
1768
return
1769
1770
#wait until timeout or approved
1771
time = datetime.datetime.now()
1772
client.changedstate.acquire()
1773
client.changedstate.wait(
1774
float(timedelta_to_milliseconds(delay)
1775
/ 1000))
1776
client.changedstate.release()
1777
time2 = datetime.datetime.now()
1778
if (time2 - time) >= delay:
1779
if not client.approved_by_default:
1780
logger.warning("Client %s timed out while"
1781
" waiting for approval",
1782
client.name)
1783
if self.server.use_dbus:
1784
# Emit D-Bus signal
1785
client.Rejected("Approval timed out")
1786
return
1787
else:
1788
break
1789
else:
1790
delay -= time2 - time
1791
1792
sent_size = 0
1793
while sent_size < len(client.secret):
1794
try:
1795
sent = session.send(client.secret[sent_size:])
1796
except gnutls.errors.GNUTLSError as error:
1797
logger.warning("gnutls send failed",
1798
exc_info=error)
1799
return
1800
logger.debug("Sent: %d, remaining: %d",
1801
sent, len(client.secret)
1802
- (sent_size + sent))
1803
sent_size += sent
1804
1805
logger.info("Sending secret to %s", client.name)
1806
# bump the timeout using extended_timeout
1807
client.bump_timeout(client.extended_timeout)
1808
if self.server.use_dbus:
1809
# Emit D-Bus signal
1810
client.GotSecret()
1811
1812
finally:
1813
if approval_required:
1814
client.approvals_pending -= 1
1815
try:
1816
session.bye()
1817
except gnutls.errors.GNUTLSError as error:
1818
logger.warning("GnuTLS bye failed",
1819
exc_info=error)
1820
1821
@staticmethod
1822
def peer_certificate(session):
1823
"Return the peer's OpenPGP certificate as a bytestring"
1824
# If not an OpenPGP certificate...
1825
if (gnutls.library.functions
1826
.gnutls_certificate_type_get(session._c_object)
1827
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1828
# ...do the normal thing
1829
return session.peer_certificate
1830
list_size = ctypes.c_uint(1)
1831
cert_list = (gnutls.library.functions
1832
.gnutls_certificate_get_peers
1833
(session._c_object, ctypes.byref(list_size)))
1834
if not bool(cert_list) and list_size.value != 0:
1835
raise gnutls.errors.GNUTLSError("error getting peer"
1836
" certificate")
1837
if list_size.value == 0:
1838
return None
1839
cert = cert_list[0]
1840
return ctypes.string_at(cert.data, cert.size)
1841
1842
@staticmethod
1843
def fingerprint(openpgp):
1844
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1845
# New GnuTLS "datum" with the OpenPGP public key
1846
datum = (gnutls.library.types
1847
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1848
ctypes.POINTER
1849
(ctypes.c_ubyte)),
1850
ctypes.c_uint(len(openpgp))))
1851
# New empty GnuTLS certificate
1852
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1853
(gnutls.library.functions
1854
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1855
# Import the OpenPGP public key into the certificate
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1858
gnutls.library.constants
1859
.GNUTLS_OPENPGP_FMT_RAW))
1860
# Verify the self signature in the key
1861
crtverify = ctypes.c_uint()
1862
(gnutls.library.functions
1863
.gnutls_openpgp_crt_verify_self(crt, 0,
1864
ctypes.byref(crtverify)))
1865
if crtverify.value != 0:
1866
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1867
raise (gnutls.errors.CertificateSecurityError
1868
("Verify failed"))
1869
# New buffer for the fingerprint
1870
buf = ctypes.create_string_buffer(20)
1871
buf_len = ctypes.c_size_t()
1872
# Get the fingerprint from the certificate into the buffer
1873
(gnutls.library.functions
1874
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1875
ctypes.byref(buf_len)))
1876
# Deinit the certificate
1877
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1878
# Convert the buffer to a Python bytestring
1879
fpr = ctypes.string_at(buf, buf_len.value)
1880
# Convert the bytestring to hexadecimal notation
1881
hex_fpr = binascii.hexlify(fpr).upper()
1882
return hex_fpr
1883
1884
1885
class MultiprocessingMixIn(object):
1886
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1887
def sub_process_main(self, request, address):
1888
try:
1889
self.finish_request(request, address)
1890
except Exception:
1891
self.handle_error(request, address)
1892
self.close_request(request)
1893
1894
def process_request(self, request, address):
1895
"""Start a new process to process the request."""
1896
proc = multiprocessing.Process(target = self.sub_process_main,
1897
args = (request, address))
1898
proc.start()
1899
return proc
1900
1901
1902
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1903
""" adds a pipe to the MixIn """
1904
def process_request(self, request, client_address):
1905
"""Overrides and wraps the original process_request().
1906
1907
This function creates a new pipe in self.pipe
1908
"""
1909
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1910
1911
proc = MultiprocessingMixIn.process_request(self, request,
1912
client_address)
1913
self.child_pipe.close()
1914
self.add_pipe(parent_pipe, proc)
1915
1916
def add_pipe(self, parent_pipe, proc):
1917
"""Dummy function; override as necessary"""
1918
raise NotImplementedError
1919
1920
1921
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1922
socketserver.TCPServer, object):
1923
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1924
518
1925
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1926
enabled: Boolean; whether this server is activated yet
1927
interface: None or a network interface name (string)
1928
use_ipv6: Boolean; to use IPv6 or not
522
1929
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1930
def __init__(self, server_address, RequestHandlerClass,
1931
interface=None, use_ipv6=True, socketfd=None):
1932
"""If socketfd is set, use that file descriptor instead of
1933
creating a new one with socket.socket().
1934
"""
1935
self.interface = interface
1936
if use_ipv6:
1937
self.address_family = socket.AF_INET6
1938
if socketfd is not None:
1939
# Save the file descriptor
1940
self.socketfd = socketfd
1941
# Save the original socket.socket() function
1942
self.socket_socket = socket.socket
1943
# To implement --socket, we monkey patch socket.socket.
1944
#
1945
# (When socketserver.TCPServer is a new-style class, we
1946
# could make self.socket into a property instead of monkey
1947
# patching socket.socket.)
1948
#
1949
# Create a one-time-only replacement for socket.socket()
1950
@functools.wraps(socket.socket)
1951
def socket_wrapper(*args, **kwargs):
1952
# Restore original function so subsequent calls are
1953
# not affected.
1954
socket.socket = self.socket_socket
1955
del self.socket_socket
1956
# This time only, return a new socket object from the
1957
# saved file descriptor.
1958
return socket.fromfd(self.socketfd, *args, **kwargs)
1959
# Replace socket.socket() function with wrapper
1960
socket.socket = socket_wrapper
1961
# The socketserver.TCPServer.__init__ will call
1962
# socket.socket(), which might be our replacement,
1963
# socket_wrapper(), if socketfd was set.
1964
socketserver.TCPServer.__init__(self, server_address,
1965
RequestHandlerClass)
1966
533
1967
def server_bind(self):
534
1968
"""This overrides the normal server_bind() function
535
1969
to bind to an interface if one was specified, and also NOT to
536
1970
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1971
if self.interface is not None:
1972
if SO_BINDTODEVICE is None:
1973
logger.error("SO_BINDTODEVICE does not exist;"
1974
" cannot bind to interface %s",
1975
self.interface)
1976
else:
1977
try:
1978
self.socket.setsockopt(socket.SOL_SOCKET,
1979
SO_BINDTODEVICE,
1980
str(self.interface + '\0'))
1981
except socket.error as error:
1982
if error.errno == errno.EPERM:
1983
logger.error("No permission to bind to"
1984
" interface %s", self.interface)
1985
elif error.errno == errno.ENOPROTOOPT:
1986
logger.error("SO_BINDTODEVICE not available;"
1987
" cannot bind to interface %s",
1988
self.interface)
1989
elif error.errno == errno.ENODEV:
1990
logger.error("Interface %s does not exist,"
1991
" cannot bind", self.interface)
1992
else:
1993
raise
551
1994
# Only bind(2) the socket if we really need to.
552
1995
if self.server_address[0] or self.server_address[1]:
553
1996
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1997
if self.address_family == socket.AF_INET6:
1998
any_address = "::" # in6addr_any
1999
else:
2000
any_address = "0.0.0.0" # INADDR_ANY
2001
self.server_address = (any_address,
556
2002
self.server_address[1])
557
2003
elif not self.server_address[1]:
558
2004
self.server_address = (self.server_address[0],
559
2005
0)
560
# if self.settings["interface"]:
2006
# if self.interface:
561
2007
# self.server_address = (self.server_address[0],
562
2008
# 0, # port
563
2009
# 0, # flowinfo
564
2010
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
2011
# (self.interface))
2012
return socketserver.TCPServer.server_bind(self)
2013
2014
2015
class MandosServer(IPv6_TCPServer):
2016
"""Mandos server.
2017
2018
Attributes:
2019
clients: set of Client objects
2020
gnutls_priority GnuTLS priority string
2021
use_dbus: Boolean; to emit D-Bus signals or not
2022
2023
Assumes a gobject.MainLoop event loop.
2024
"""
2025
def __init__(self, server_address, RequestHandlerClass,
2026
interface=None, use_ipv6=True, clients=None,
2027
gnutls_priority=None, use_dbus=True, socketfd=None):
2028
self.enabled = False
2029
self.clients = clients
2030
if self.clients is None:
2031
self.clients = {}
2032
self.use_dbus = use_dbus
2033
self.gnutls_priority = gnutls_priority
2034
IPv6_TCPServer.__init__(self, server_address,
2035
RequestHandlerClass,
2036
interface = interface,
2037
use_ipv6 = use_ipv6,
2038
socketfd = socketfd)
568
2039
def server_activate(self):
569
2040
if self.enabled:
570
return super(type(self), self).server_activate()
2041
return socketserver.TCPServer.server_activate(self)
2042
571
2043
def enable(self):
572
2044
self.enabled = True
2045
2046
def add_pipe(self, parent_pipe, proc):
2047
# Call "handle_ipc" for both data and EOF events
2048
gobject.io_add_watch(parent_pipe.fileno(),
2049
gobject.IO_IN | gobject.IO_HUP,
2050
functools.partial(self.handle_ipc,
2051
parent_pipe =
2052
parent_pipe,
2053
proc = proc))
2054
2055
def handle_ipc(self, source, condition, parent_pipe=None,
2056
proc = None, client_object=None):
2057
# error, or the other end of multiprocessing.Pipe has closed
2058
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2059
# Wait for other process to exit
2060
proc.join()
2061
return False
2062
2063
# Read a request from the child
2064
request = parent_pipe.recv()
2065
command = request[0]
2066
2067
if command == 'init':
2068
fpr = request[1]
2069
address = request[2]
2070
2071
for c in self.clients.itervalues():
2072
if c.fingerprint == fpr:
2073
client = c
2074
break
2075
else:
2076
logger.info("Client not found for fingerprint: %s, ad"
2077
"dress: %s", fpr, address)
2078
if self.use_dbus:
2079
# Emit D-Bus signal
2080
mandos_dbus_service.ClientNotFound(fpr,
2081
address[0])
2082
parent_pipe.send(False)
2083
return False
2084
2085
gobject.io_add_watch(parent_pipe.fileno(),
2086
gobject.IO_IN | gobject.IO_HUP,
2087
functools.partial(self.handle_ipc,
2088
parent_pipe =
2089
parent_pipe,
2090
proc = proc,
2091
client_object =
2092
client))
2093
parent_pipe.send(True)
2094
# remove the old hook in favor of the new above hook on
2095
# same fileno
2096
return False
2097
if command == 'funcall':
2098
funcname = request[1]
2099
args = request[2]
2100
kwargs = request[3]
2101
2102
parent_pipe.send(('data', getattr(client_object,
2103
funcname)(*args,
2104
**kwargs)))
2105
2106
if command == 'getattr':
2107
attrname = request[1]
2108
if callable(client_object.__getattribute__(attrname)):
2109
parent_pipe.send(('function',))
2110
else:
2111
parent_pipe.send(('data', client_object
2112
.__getattribute__(attrname)))
2113
2114
if command == 'setattr':
2115
attrname = request[1]
2116
value = request[2]
2117
setattr(client_object, attrname, value)
2118
2119
return True
2120
2121
2122
def rfc3339_duration_to_delta(duration):
2123
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2124
2125
>>> rfc3339_duration_to_delta("P7D")
2126
datetime.timedelta(7)
2127
>>> rfc3339_duration_to_delta("PT60S")
2128
datetime.timedelta(0, 60)
2129
>>> rfc3339_duration_to_delta("PT60M")
2130
datetime.timedelta(0, 3600)
2131
>>> rfc3339_duration_to_delta("PT24H")
2132
datetime.timedelta(1)
2133
>>> rfc3339_duration_to_delta("P1W")
2134
datetime.timedelta(7)
2135
>>> rfc3339_duration_to_delta("PT5M30S")
2136
datetime.timedelta(0, 330)
2137
>>> rfc3339_duration_to_delta("P1DT3M20S")
2138
datetime.timedelta(1, 200)
2139
"""
2140
2141
# Parsing an RFC 3339 duration with regular expressions is not
2142
# possible - there would have to be multiple places for the same
2143
# values, like seconds. The current code, while more esoteric, is
2144
# cleaner without depending on a parsing library. If Python had a
2145
# built-in library for parsing we would use it, but we'd like to
2146
# avoid excessive use of external libraries.
2147
2148
# New type for defining tokens, syntax, and semantics all-in-one
2149
Token = collections.namedtuple("Token",
2150
("regexp", # To match token; if
2151
# "value" is not None,
2152
# must have a "group"
2153
# containing digits
2154
"value", # datetime.timedelta or
2155
# None
2156
"followers")) # Tokens valid after
2157
# this token
2158
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2159
# the "duration" ABNF definition in RFC 3339, Appendix A.
2160
token_end = Token(re.compile(r"$"), None, frozenset())
2161
token_second = Token(re.compile(r"(\d+)S"),
2162
datetime.timedelta(seconds=1),
2163
frozenset((token_end,)))
2164
token_minute = Token(re.compile(r"(\d+)M"),
2165
datetime.timedelta(minutes=1),
2166
frozenset((token_second, token_end)))
2167
token_hour = Token(re.compile(r"(\d+)H"),
2168
datetime.timedelta(hours=1),
2169
frozenset((token_minute, token_end)))
2170
token_time = Token(re.compile(r"T"),
2171
None,
2172
frozenset((token_hour, token_minute,
2173
token_second)))
2174
token_day = Token(re.compile(r"(\d+)D"),
2175
datetime.timedelta(days=1),
2176
frozenset((token_time, token_end)))
2177
token_month = Token(re.compile(r"(\d+)M"),
2178
datetime.timedelta(weeks=4),
2179
frozenset((token_day, token_end)))
2180
token_year = Token(re.compile(r"(\d+)Y"),
2181
datetime.timedelta(weeks=52),
2182
frozenset((token_month, token_end)))
2183
token_week = Token(re.compile(r"(\d+)W"),
2184
datetime.timedelta(weeks=1),
2185
frozenset((token_end,)))
2186
token_duration = Token(re.compile(r"P"), None,
2187
frozenset((token_year, token_month,
2188
token_day, token_time,
2189
token_week))),
2190
# Define starting values
2191
value = datetime.timedelta() # Value so far
2192
found_token = None
2193
followers = frozenset(token_duration,) # Following valid tokens
2194
s = duration # String left to parse
2195
# Loop until end token is found
2196
while found_token is not token_end:
2197
# Search for any currently valid tokens
2198
for token in followers:
2199
match = token.regexp.match(s)
2200
if match is not None:
2201
# Token found
2202
if token.value is not None:
2203
# Value found, parse digits
2204
factor = int(match.group(1), 10)
2205
# Add to value so far
2206
value += factor * token.value
2207
# Strip token from string
2208
s = token.regexp.sub("", s, 1)
2209
# Go to found token
2210
found_token = token
2211
# Set valid next tokens
2212
followers = found_token.followers
2213
break
2214
else:
2215
# No currently valid tokens were found
2216
raise ValueError("Invalid RFC 3339 duration")
2217
# End token found
2218
return value
573
2219
574
2220
575
2221
def string_to_delta(interval):
576
2222
"""Parse a string and return a datetime.timedelta
577
2223
578
2224
>>> string_to_delta('7d')
579
2225
datetime.timedelta(7)
580
2226
>>> string_to_delta('60s')
583
2229
datetime.timedelta(0, 3600)
584
2230
>>> string_to_delta('24h')
585
2231
datetime.timedelta(1)
586
>>> string_to_delta(u'1w')
2232
>>> string_to_delta('1w')
587
2233
datetime.timedelta(7)
588
2234
>>> string_to_delta('5m 30s')
589
2235
datetime.timedelta(0, 330)
590
2236
"""
2237
2238
try:
2239
return rfc3339_duration_to_delta(interval)
2240
except ValueError:
2241
pass
2242
591
2243
timevalue = datetime.timedelta(0)
592
2244
for s in interval.split():
593
2245
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
2246
suffix = unicode(s[-1])
2247
value = int(s[:-1])
2248
if suffix == "d":
597
2249
delta = datetime.timedelta(value)
598
elif suffix == u"s":
2250
elif suffix == "s":
599
2251
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
2252
elif suffix == "m":
601
2253
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
2254
elif suffix == "h":
603
2255
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
2256
elif suffix == "w":
605
2257
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
2258
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
2259
raise ValueError("Unknown suffix {0!r}"
2260
.format(suffix))
2261
except (ValueError, IndexError) as e:
2262
raise ValueError(*(e.args))
610
2263
timevalue += delta
611
2264
return timevalue
612
2265
613
2266
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
640
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
645
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
660
661
662
2267
def daemon(nochdir = False, noclose = False):
663
2268
"""See daemon(3). Standard BSD Unix function.
2269
664
2270
This should really exist as os.daemon, but it doesn't (yet)."""
665
2271
if os.fork():
666
2272
sys.exit()
671
2277
sys.exit()
672
2278
if not noclose:
673
2279
# Close all standard open file descriptors
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2280
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
675
2281
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
2282
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
2283
"{0} not a character device"
2284
.format(os.devnull))
678
2285
os.dup2(null, sys.stdin.fileno())
679
2286
os.dup2(null, sys.stdout.fileno())
680
2287
os.dup2(null, sys.stderr.fileno())
683
2290
684
2291
685
2292
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
2293
2294
##################################################################
2295
# Parsing of options, both command line and config file
2296
2297
parser = argparse.ArgumentParser()
2298
parser.add_argument("-v", "--version", action="version",
2299
version = "%(prog)s {0}".format(version),
2300
help="show version number and exit")
2301
parser.add_argument("-i", "--interface", metavar="IF",
2302
help="Bind to interface IF")
2303
parser.add_argument("-a", "--address",
2304
help="Address to listen for requests on")
2305
parser.add_argument("-p", "--port", type=int,
2306
help="Port number to receive requests on")
2307
parser.add_argument("--check", action="store_true",
2308
help="Run self-test")
2309
parser.add_argument("--debug", action="store_true",
2310
help="Debug mode; run in foreground and log"
2311
" to terminal", default=None)
2312
parser.add_argument("--debuglevel", metavar="LEVEL",
2313
help="Debug level for stdout output")
2314
parser.add_argument("--priority", help="GnuTLS"
2315
" priority string (see GnuTLS documentation)")
2316
parser.add_argument("--servicename",
2317
metavar="NAME", help="Zeroconf service name")
2318
parser.add_argument("--configdir",
2319
default="/etc/mandos", metavar="DIR",
2320
help="Directory to search for configuration"
2321
" files")
2322
parser.add_argument("--no-dbus", action="store_false",
2323
dest="use_dbus", help="Do not provide D-Bus"
2324
" system bus interface", default=None)
2325
parser.add_argument("--no-ipv6", action="store_false",
2326
dest="use_ipv6", help="Do not use IPv6",
2327
default=None)
2328
parser.add_argument("--no-restore", action="store_false",
2329
dest="restore", help="Do not restore stored"
2330
" state", default=None)
2331
parser.add_argument("--socket", type=int,
2332
help="Specify a file descriptor to a network"
2333
" socket to use instead of creating one")
2334
parser.add_argument("--statedir", metavar="DIR",
2335
help="Directory to save/restore state in")
2336
parser.add_argument("--foreground", action="store_true",
2337
help="Run in foreground", default=None)
2338
2339
options = parser.parse_args()
710
2340
711
2341
if options.check:
712
2342
import doctest
719
2349
"port": "",
720
2350
"debug": "False",
721
2351
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2352
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
723
2353
"servicename": "Mandos",
2354
"use_dbus": "True",
2355
"use_ipv6": "True",
2356
"debuglevel": "",
2357
"restore": "True",
2358
"socket": "",
2359
"statedir": "/var/lib/mandos",
2360
"foreground": "False",
724
2361
}
725
2362
726
2363
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
2364
server_config = configparser.SafeConfigParser(server_defaults)
728
2365
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2366
server_config.read(os.path.join(options.configdir,
2367
"mandos.conf"))
730
2368
# Convert the SafeConfigParser object to a dict
731
2369
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
2370
# Use the appropriate methods on the non-string config options
2371
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2372
server_settings[option] = server_config.getboolean("DEFAULT",
2373
option)
2374
if server_settings["port"]:
2375
server_settings["port"] = server_config.getint("DEFAULT",
2376
"port")
2377
if server_settings["socket"]:
2378
server_settings["socket"] = server_config.getint("DEFAULT",
2379
"socket")
2380
# Later, stdin will, and stdout and stderr might, be dup'ed
2381
# over with an opened os.devnull. But we don't want this to
2382
# happen with a supplied network socket.
2383
if 0 <= server_settings["socket"] <= 2:
2384
server_settings["socket"] = os.dup(server_settings
2385
["socket"])
735
2386
del server_config
736
2387
737
2388
# Override the settings from the config file with command line
738
2389
# options, if set.
739
2390
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
2391
"priority", "servicename", "configdir",
2392
"use_dbus", "use_ipv6", "debuglevel", "restore",
2393
"statedir", "socket", "foreground"):
741
2394
value = getattr(options, option)
742
2395
if value is not None:
743
2396
server_settings[option] = value
744
2397
del options
2398
# Force all strings to be unicode
2399
for option in server_settings.keys():
2400
if type(server_settings[option]) is str:
2401
server_settings[option] = unicode(server_settings[option])
2402
# Force all boolean options to be boolean
2403
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2404
"foreground"):
2405
server_settings[option] = bool(server_settings[option])
2406
# Debug implies foreground
2407
if server_settings["debug"]:
2408
server_settings["foreground"] = True
745
2409
# Now we have our good server settings in "server_settings"
746
2410
2411
##################################################################
2412
2413
# For convenience
747
2414
debug = server_settings["debug"]
2415
debuglevel = server_settings["debuglevel"]
2416
use_dbus = server_settings["use_dbus"]
2417
use_ipv6 = server_settings["use_ipv6"]
2418
stored_state_path = os.path.join(server_settings["statedir"],
2419
stored_state_file)
2420
foreground = server_settings["foreground"]
748
2421
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2422
if debug:
2423
initlogger(debug, logging.DEBUG)
2424
else:
2425
if not debuglevel:
2426
initlogger(debug)
2427
else:
2428
level = getattr(logging, debuglevel.upper())
2429
initlogger(debug, level)
752
2430
753
2431
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
2432
syslogger.setFormatter(logging.Formatter
2433
('Mandos ({0}) [%(process)d]:'
2434
' %(levelname)s: %(message)s'
2435
.format(server_settings
2436
["servicename"])))
758
2437
759
2438
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
764
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2439
client_config = configparser.SafeConfigParser(Client
2440
.client_defaults)
766
2441
client_config.read(os.path.join(server_settings["configdir"],
767
2442
"clients.conf"))
768
2443
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
2444
global mandos_dbus_service
2445
mandos_dbus_service = None
2446
2447
tcp_server = MandosServer((server_settings["address"],
2448
server_settings["port"]),
2449
ClientHandler,
2450
interface=(server_settings["interface"]
2451
or None),
2452
use_ipv6=use_ipv6,
2453
gnutls_priority=
2454
server_settings["priority"],
2455
use_dbus=use_dbus,
2456
socketfd=(server_settings["socket"]
2457
or None))
2458
if not foreground:
2459
pidfilename = "/run/mandos.pid"
2460
pidfile = None
2461
try:
2462
pidfile = open(pidfilename, "w")
2463
except IOError as e:
2464
logger.error("Could not open file %r", pidfilename,
2465
exc_info=e)
2466
2467
for name in ("_mandos", "mandos", "nobody"):
2468
try:
2469
uid = pwd.getpwnam(name).pw_uid
2470
gid = pwd.getpwnam(name).pw_gid
2471
break
2472
except KeyError:
2473
continue
2474
else:
2475
uid = 65534
2476
gid = 65534
2477
try:
2478
os.setgid(gid)
798
2479
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
801
if error[0] != errno.EPERM:
2480
except OSError as error:
2481
if error.errno != errno.EPERM:
802
2482
raise error
803
2483
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
2484
if debug:
2485
# Enable all possible GnuTLS debugging
2486
2487
# "Use a log level over 10 to enable all debugging options."
2488
# - GnuTLS manual
2489
gnutls.library.functions.gnutls_global_set_log_level(11)
2490
2491
@gnutls.library.types.gnutls_log_func
2492
def debug_gnutls(level, string):
2493
logger.debug("GnuTLS: %s", string[:-1])
2494
2495
(gnutls.library.functions
2496
.gnutls_global_set_log_function(debug_gnutls))
2497
2498
# Redirect stdin so all checkers get /dev/null
2499
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2500
os.dup2(null, sys.stdin.fileno())
2501
if null > 2:
2502
os.close(null)
2503
2504
# Need to fork before connecting to D-Bus
2505
if not foreground:
2506
# Close all input and output, do double fork, etc.
2507
daemon()
2508
2509
# multiprocessing will use threads, so before we use gobject we
2510
# need to inform gobject that threads will be used.
2511
gobject.threads_init()
810
2512
811
2513
global main_loop
812
global bus
813
global server
814
2514
# From the Avahi example code
815
DBusGMainLoop(set_as_default=True )
2515
DBusGMainLoop(set_as_default=True)
816
2516
main_loop = gobject.MainLoop()
817
2517
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
2518
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
2519
if use_dbus:
2520
try:
2521
bus_name = dbus.service.BusName("se.recompile.Mandos",
2522
bus, do_not_queue=True)
2523
old_bus_name = (dbus.service.BusName
2524
("se.bsnet.fukt.Mandos", bus,
2525
do_not_queue=True))
2526
except dbus.exceptions.NameExistsException as e:
2527
logger.error("Disabling D-Bus:", exc_info=e)
2528
use_dbus = False
2529
server_settings["use_dbus"] = False
2530
tcp_server.use_dbus = False
2531
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2532
service = AvahiServiceToSyslog(name =
2533
server_settings["servicename"],
2534
servicetype = "_mandos._tcp",
2535
protocol = protocol, bus = bus)
2536
if server_settings["interface"]:
2537
service.interface = (if_nametoindex
2538
(str(server_settings["interface"])))
2539
2540
global multiprocessing_manager
2541
multiprocessing_manager = multiprocessing.Manager()
2542
2543
client_class = Client
2544
if use_dbus:
2545
client_class = functools.partial(ClientDBus, bus = bus)
2546
2547
client_settings = Client.config_parser(client_config)
2548
old_client_settings = {}
2549
clients_data = {}
2550
2551
# This is used to redirect stdout and stderr for checker processes
2552
global wnull
2553
wnull = open(os.devnull, "w") # A writable /dev/null
2554
# Only used if server is running in foreground but not in debug
2555
# mode
2556
if debug or not foreground:
2557
wnull.close()
2558
2559
# Get client data and settings from last running state.
2560
if server_settings["restore"]:
2561
try:
2562
with open(stored_state_path, "rb") as stored_state:
2563
clients_data, old_client_settings = (pickle.load
2564
(stored_state))
2565
os.remove(stored_state_path)
2566
except IOError as e:
2567
if e.errno == errno.ENOENT:
2568
logger.warning("Could not load persistent state: {0}"
2569
.format(os.strerror(e.errno)))
2570
else:
2571
logger.critical("Could not load persistent state:",
2572
exc_info=e)
2573
raise
2574
except EOFError as e:
2575
logger.warning("Could not load persistent state: "
2576
"EOFError:", exc_info=e)
2577
2578
with PGPEngine() as pgp:
2579
for client_name, client in clients_data.iteritems():
2580
# Skip removed clients
2581
if client_name not in client_settings:
2582
continue
2583
2584
# Decide which value to use after restoring saved state.
2585
# We have three different values: Old config file,
2586
# new config file, and saved state.
2587
# New config value takes precedence if it differs from old
2588
# config value, otherwise use saved state.
2589
for name, value in client_settings[client_name].items():
2590
try:
2591
# For each value in new config, check if it
2592
# differs from the old config value (Except for
2593
# the "secret" attribute)
2594
if (name != "secret" and
2595
value != old_client_settings[client_name]
2596
[name]):
2597
client[name] = value
2598
except KeyError:
2599
pass
2600
2601
# Clients who has passed its expire date can still be
2602
# enabled if its last checker was successful. Clients
2603
# whose checker succeeded before we stored its state is
2604
# assumed to have successfully run all checkers during
2605
# downtime.
2606
if client["enabled"]:
2607
if datetime.datetime.utcnow() >= client["expires"]:
2608
if not client["last_checked_ok"]:
2609
logger.warning(
2610
"disabling client {0} - Client never "
2611
"performed a successful checker"
2612
.format(client_name))
2613
client["enabled"] = False
2614
elif client["last_checker_status"] != 0:
2615
logger.warning(
2616
"disabling client {0} - Client "
2617
"last checker failed with error code {1}"
2618
.format(client_name,
2619
client["last_checker_status"]))
2620
client["enabled"] = False
2621
else:
2622
client["expires"] = (datetime.datetime
2623
.utcnow()
2624
+ client["timeout"])
2625
logger.debug("Last checker succeeded,"
2626
" keeping {0} enabled"
2627
.format(client_name))
2628
try:
2629
client["secret"] = (
2630
pgp.decrypt(client["encrypted_secret"],
2631
client_settings[client_name]
2632
["secret"]))
2633
except PGPError:
2634
# If decryption fails, we use secret from new settings
2635
logger.debug("Failed to decrypt {0} old secret"
2636
.format(client_name))
2637
client["secret"] = (
2638
client_settings[client_name]["secret"])
2639
2640
# Add/remove clients based on new changes made to config
2641
for client_name in (set(old_client_settings)
2642
- set(client_settings)):
2643
del clients_data[client_name]
2644
for client_name in (set(client_settings)
2645
- set(old_client_settings)):
2646
clients_data[client_name] = client_settings[client_name]
2647
2648
# Create all client objects
2649
for client_name, client in clients_data.iteritems():
2650
tcp_server.clients[client_name] = client_class(
2651
name = client_name, settings = client,
2652
server_settings = server_settings)
2653
2654
if not tcp_server.clients:
2655
logger.warning("No clients defined")
2656
2657
if not foreground:
2658
if pidfile is not None:
2659
try:
2660
with pidfile:
2661
pid = os.getpid()
2662
pidfile.write(str(pid) + "\n".encode("utf-8"))
2663
except IOError:
2664
logger.error("Could not write to file %r with PID %d",
2665
pidfilename, pid)
854
2666
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
2667
del pidfilename
2668
2669
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2670
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2671
2672
if use_dbus:
2673
@alternate_dbus_interfaces({"se.recompile.Mandos":
2674
"se.bsnet.fukt.Mandos"})
2675
class MandosDBusService(DBusObjectWithProperties):
2676
"""A D-Bus proxy object"""
2677
def __init__(self):
2678
dbus.service.Object.__init__(self, bus, "/")
2679
_interface = "se.recompile.Mandos"
2680
2681
@dbus_interface_annotations(_interface)
2682
def _foo(self):
2683
return { "org.freedesktop.DBus.Property"
2684
".EmitsChangedSignal":
2685
"false"}
2686
2687
@dbus.service.signal(_interface, signature="o")
2688
def ClientAdded(self, objpath):
2689
"D-Bus signal"
2690
pass
2691
2692
@dbus.service.signal(_interface, signature="ss")
2693
def ClientNotFound(self, fingerprint, address):
2694
"D-Bus signal"
2695
pass
2696
2697
@dbus.service.signal(_interface, signature="os")
2698
def ClientRemoved(self, objpath, name):
2699
"D-Bus signal"
2700
pass
2701
2702
@dbus.service.method(_interface, out_signature="ao")
2703
def GetAllClients(self):
2704
"D-Bus method"
2705
return dbus.Array(c.dbus_object_path
2706
for c in
2707
tcp_server.clients.itervalues())
2708
2709
@dbus.service.method(_interface,
2710
out_signature="a{oa{sv}}")
2711
def GetAllClientsWithProperties(self):
2712
"D-Bus method"
2713
return dbus.Dictionary(
2714
((c.dbus_object_path, c.GetAll(""))
2715
for c in tcp_server.clients.itervalues()),
2716
signature="oa{sv}")
2717
2718
@dbus.service.method(_interface, in_signature="o")
2719
def RemoveClient(self, object_path):
2720
"D-Bus method"
2721
for c in tcp_server.clients.itervalues():
2722
if c.dbus_object_path == object_path:
2723
del tcp_server.clients[c.name]
2724
c.remove_from_connection()
2725
# Don't signal anything except ClientRemoved
2726
c.disable(quiet=True)
2727
# Emit D-Bus signal
2728
self.ClientRemoved(object_path, c.name)
2729
return
2730
raise KeyError(object_path)
2731
2732
del _interface
2733
2734
mandos_dbus_service = MandosDBusService()
862
2735
863
2736
def cleanup():
864
2737
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
2738
service.cleanup()
2739
2740
multiprocessing.active_children()
2741
wnull.close()
2742
if not (tcp_server.clients or client_settings):
2743
return
2744
2745
# Store client before exiting. Secrets are encrypted with key
2746
# based on what config file has. If config file is
2747
# removed/edited, old secret will thus be unrecovable.
2748
clients = {}
2749
with PGPEngine() as pgp:
2750
for client in tcp_server.clients.itervalues():
2751
key = client_settings[client.name]["secret"]
2752
client.encrypted_secret = pgp.encrypt(client.secret,
2753
key)
2754
client_dict = {}
2755
2756
# A list of attributes that can not be pickled
2757
# + secret.
2758
exclude = set(("bus", "changedstate", "secret",
2759
"checker", "server_settings"))
2760
for name, typ in (inspect.getmembers
2761
(dbus.service.Object)):
2762
exclude.add(name)
2763
2764
client_dict["encrypted_secret"] = (client
2765
.encrypted_secret)
2766
for attr in client.client_structure:
2767
if attr not in exclude:
2768
client_dict[attr] = getattr(client, attr)
2769
2770
clients[client.name] = client_dict
2771
del client_settings[client.name]["secret"]
2772
2773
try:
2774
with (tempfile.NamedTemporaryFile
2775
(mode='wb', suffix=".pickle", prefix='clients-',
2776
dir=os.path.dirname(stored_state_path),
2777
delete=False)) as stored_state:
2778
pickle.dump((clients, client_settings), stored_state)
2779
tempname=stored_state.name
2780
os.rename(tempname, stored_state_path)
2781
except (IOError, OSError) as e:
2782
if not debug:
2783
try:
2784
os.remove(tempname)
2785
except NameError:
2786
pass
2787
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2788
logger.warning("Could not save persistent state: {0}"
2789
.format(os.strerror(e.errno)))
2790
else:
2791
logger.warning("Could not save persistent state:",
2792
exc_info=e)
2793
raise e
2794
2795
# Delete all clients, and settings from config
2796
while tcp_server.clients:
2797
name, client = tcp_server.clients.popitem()
2798
if use_dbus:
2799
client.remove_from_connection()
2800
# Don't signal anything except ClientRemoved
2801
client.disable(quiet=True)
2802
if use_dbus:
2803
# Emit D-Bus signal
2804
mandos_dbus_service.ClientRemoved(client
2805
.dbus_object_path,
2806
client.name)
2807
client_settings.clear()
876
2808
877
2809
atexit.register(cleanup)
878
2810
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
2811
for client in tcp_server.clients.itervalues():
2812
if use_dbus:
2813
# Emit D-Bus signal
2814
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2815
# Need to initiate checking of clients
2816
if client.enabled:
2817
client.init_checker()
886
2818
887
2819
tcp_server.enable()
888
2820
tcp_server.server_activate()
889
2821
890
2822
# Find out what port we got
891
2823
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2824
if use_ipv6:
2825
logger.info("Now listening on address %r, port %d,"
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2828
else: # IPv4
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
894
2831
895
2832
#service.interface = tcp_server.socket.getsockname()[3]
896
2833
897
2834
try:
898
2835
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
2836
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2837
service.activate()
2838
except dbus.exceptions.DBusException as error:
2839
logger.critical("D-Bus Exception", exc_info=error)
2840
cleanup()
904
2841
sys.exit(1)
905
2842
# End of Avahi example code
906
2843
907
2844
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2845
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2846
(tcp_server.handle_request
2847
(*args[2:], **kwargs) or True))
911
2848
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2849
logger.debug("Starting main loop")
914
2850
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2851
except AvahiError as error:
2852
logger.critical("Avahi Error", exc_info=error)
2853
cleanup()
917
2854
sys.exit(1)
918
2855
except KeyboardInterrupt:
919
2856
if debug:
920
print
2857
print("", file=sys.stderr)
2858
logger.debug("Server received KeyboardInterrupt")
2859
logger.debug("Server exiting")
2860
# Must run before the D-Bus bus name gets deregistered
2861
cleanup()
921
2862
922
2863
if __name__ == '__main__':
923
2864
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0