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- Committer: Teddy Hogeborn
- Date: 2014-02-16 02:42:42 UTC
- Revision ID: teddy@recompile.se-20140216024242-9wiw1nkxgt7ohovj
Fix running of self-tests.
* debian/control (Build-Depends): Add Python dependencies to
successfully run self-tests.
* debian/copyright: GPLv3 now has its own license file - use it.
* debian/watch: Set PGP signature URL.
* mandos (main): Bug fix: When running self-tests, set exit code.
* mandos-ctl (main): Cosmetic fix; use os.EX_OK instead of plain 0.
* debian/control (Build-Depends): Add Python dependencies to
successfully run self-tests.
* debian/copyright: GPLv3 now has its own license file - use it.
* debian/watch: Set PGP signature URL.
* mandos (main): Bug fix: When running self-tests, set exit code.
* mandos-ctl (main): Cosmetic fix; use os.EX_OK instead of plain 0.
- 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 © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
31
32
#
32
33
33
from __future__ import division
34
35
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
import SocketServer as socketserver
36
40
import socket
37
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
60
import pwd
61
import contextlib
62
import struct
63
import fcntl
64
import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
58
72
59
73
import dbus
74
import dbus.service
60
75
import gobject
61
76
import avahi
62
77
from dbus.mainloop.glib import DBusGMainLoop
63
78
import ctypes
64
65
version = "1.0"
66
67
logger = logging.Logger('mandos')
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
73
logger.addHandler(syslogger)
74
75
console = logging.StreamHandler()
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
78
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 = "1.6.3"
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
79
220
80
221
class AvahiError(Exception):
81
def __init__(self, value):
222
def __init__(self, value, *args, **kwargs):
82
223
self.value = value
83
def __str__(self):
84
return repr(self.value)
224
super(AvahiError, self).__init__(value, *args, **kwargs)
225
def __unicode__(self):
226
return unicode(repr(self.value))
85
227
86
228
class AvahiServiceError(AvahiError):
87
229
pass
92
234
93
235
class AvahiService(object):
94
236
"""An Avahi (Zeroconf) service.
237
95
238
Attributes:
96
239
interface: integer; avahi.IF_UNSPEC or an interface index.
97
240
Used to optionally bind to the specified interface.
98
241
name: string; Example: 'Mandos'
99
242
type: string; Example: '_mandos._tcp'.
100
See <http://www.dns-sd.org/ServiceTypes.html>
243
See <https://www.iana.org/assignments/service-names-port-numbers>
101
244
port: integer; what port to announce
102
245
TXT: list of strings; TXT record for the service
103
246
domain: string; Domain to publish on, default to .local if empty.
105
248
max_renames: integer; maximum number of renames
106
249
rename_count: integer; counter so we only rename after collisions
107
250
a sensible number of times
251
group: D-Bus Entry Group
252
server: D-Bus Server
253
bus: dbus.SystemBus()
108
254
"""
255
109
256
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
257
servicetype = None, port = None, TXT = None,
258
domain = "", host = "", max_renames = 32768,
259
protocol = avahi.PROTO_UNSPEC, bus = None):
112
260
self.interface = interface
113
261
self.name = name
114
self.type = type
262
self.type = servicetype
115
263
self.port = port
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
264
self.TXT = TXT if TXT is not None else []
120
265
self.domain = domain
121
266
self.host = host
122
267
self.rename_count = 0
123
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
124
275
def rename(self):
125
276
"""Derived from the Avahi example code"""
126
277
if self.rename_count >= self.max_renames:
127
logger.critical(u"No suitable Zeroconf service name found"
128
u" after %i retries, exiting.",
129
rename_count)
278
logger.critical("No suitable Zeroconf service name found"
279
" after %i retries, exiting.",
280
self.rename_count)
130
281
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
132
logger.info(u"Changing Zeroconf service name to %r ...",
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(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)
137
286
self.remove()
138
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)
139
293
self.rename_count += 1
294
140
295
def remove(self):
141
296
"""Derived from the Avahi example code"""
142
if group is not None:
143
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
144
303
def add(self):
145
304
"""Derived from the Avahi example code"""
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# 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))
169
406
170
407
171
408
class Client(object):
172
409
"""A representation of a client host served by this server.
410
173
411
Attributes:
174
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()
175
430
fingerprint: string (40 or 32 hexadecimal digits); used to
176
431
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
193
runtime with vars(self) as dict, so that for
194
instance %(name)s can be used in the command.
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_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()
200
450
"""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
225
"""Note: the 'checker' key in 'config' sets the
226
'checker_command' attribute and *not* the 'checker'
227
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):
228
531
self.name = name
229
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)
230
550
# Uppercase and remove spaces from fingerprint for later
231
551
# comparison purposes with return value from the fingerprint()
232
552
# function
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
242
else:
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(config["timeout"])
249
self.interval = string_to_delta(config["interval"])
250
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
251
558
self.checker = None
252
559
self.checker_initiator_tag = None
253
self.stop_initiator_tag = None
560
self.disable_initiator_tag = None
254
561
self.checker_callback_tag = None
255
self.check_command = config["checker"]
256
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):
257
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):
258
620
# Schedule a new checker to be started an 'interval' from now,
259
621
# and every interval from then on.
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
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))
263
633
# Also start a new checker *right now*.
264
634
self.start_checker()
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
278
return False
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
283
gobject.source_remove(self.checker_initiator_tag)
284
self.checker_initiator_tag = None
285
self.stop_checker()
286
if self.stop_hook:
287
self.stop_hook(self)
288
# Do not run this again if called by a gobject.timeout_add
289
return False
290
def __del__(self):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
635
636
def checker_callback(self, pid, condition, command):
294
637
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
296
638
self.checker_callback_tag = None
297
639
self.checker = None
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
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?",
309
652
vars(self))
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
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
313
676
def start_checker(self):
314
677
"""Start a new checker subprocess if one is not running.
678
315
679
If a checker already exists, leave it running and do
316
680
nothing."""
317
681
# The reason for not killing a running checker is that if we
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# 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
322
686
# checkers alone, the checker would have to take more time
323
# than 'timeout' for the client to be declared invalid, which
324
# 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:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
698
else:
699
if pid:
700
logger.warning("Checker was a zombie")
701
gobject.source_remove(self.checker_callback_tag)
702
self.checker_callback(pid, status,
703
self.current_checker_command)
704
# Start a new checker if needed
325
705
if self.checker is None:
326
try:
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
329
except TypeError:
330
# Escape attributes for the shell
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
334
try:
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
339
return True # Try again later
340
try:
341
logger.info(u"Starting checker %r for %s",
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
709
for attr in
710
self.runtime_expansions)
711
try:
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
717
self.current_checker_command = command
718
try:
719
logger.info("Starting checker %r for %s",
342
720
command, self.name)
343
721
# We don't need to redirect stdout and stderr, since
344
722
# in normal mode, that is already done by daemon(),
345
723
# and in debug mode we don't want to. (Stdin is
346
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
347
733
self.checker = subprocess.Popen(command,
348
734
close_fds=True,
349
shell=True, cwd="/")
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
353
except OSError, error:
354
logger.error(u"Failed to start subprocess: %s",
355
error)
735
shell=True, cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = (gobject.child_watch_add
742
(self.checker.pid,
743
self.checker_callback,
744
data=command))
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
747
try:
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
749
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
753
exc_info=error)
754
return True
755
raise
756
if pid:
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
356
759
# Re-run this periodically if run by gobject.timeout_add
357
760
return True
761
358
762
def stop_checker(self):
359
763
"""Force the checker process, if any, to stop."""
360
764
if self.checker_callback_tag:
362
766
self.checker_callback_tag = None
363
767
if getattr(self, "checker", None) is None:
364
768
return
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
769
logger.debug("Stopping checker for %(name)s", vars(self))
366
770
try:
367
os.kill(self.checker.pid, signal.SIGTERM)
368
#os.sleep(0.5)
771
self.checker.terminate()
772
#time.sleep(0.5)
369
773
#if self.checker.poll() is None:
370
# os.kill(self.checker.pid, signal.SIGKILL)
371
except OSError, error:
774
# self.checker.kill()
775
except OSError as error:
372
776
if error.errno != errno.ESRCH: # No such process
373
777
raise
374
778
self.checker = None
375
def still_valid(self):
376
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
378
if self.last_checked_ok is None:
379
return now < (self.created + self.timeout)
380
else:
381
return now < (self.last_checked_ok + self.timeout)
382
383
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
779
780
781
def dbus_service_property(dbus_interface, signature="v",
782
access="readwrite", byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {0!r}".format(signature))
798
def decorator(func):
799
func._dbus_is_property = True
800
func._dbus_interface = dbus_interface
801
func._dbus_signature = signature
802
func._dbus_access = access
803
func._dbus_name = func.__name__
804
if func._dbus_name.endswith("_dbus_property"):
805
func._dbus_name = func._dbus_name[:-14]
806
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
807
return func
808
return decorator
809
810
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
813
814
Usage:
815
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
820
"false"}
821
"""
822
def decorator(func):
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
826
return func
827
return decorator
828
829
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
832
Usage:
833
834
@dbus_service_property("org.example.Interface", signature="b",
835
access="r")
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
841
"""
842
def decorator(func):
843
func._dbus_annotations = annotations
844
return func
845
return decorator
846
847
848
class DBusPropertyException(dbus.exceptions.DBusException):
849
"""A base class for D-Bus property-related exceptions
850
"""
851
def __unicode__(self):
852
return unicode(str(self))
853
854
855
class DBusPropertyAccessException(DBusPropertyException):
856
"""A property's access permissions disallows an operation.
857
"""
858
pass
859
860
861
class DBusPropertyNotFound(DBusPropertyException):
862
"""An attempt was made to access a non-existing property.
863
"""
864
pass
865
866
867
class DBusObjectWithProperties(dbus.service.Object):
868
"""A D-Bus object with properties.
869
870
Classes inheriting from this can use the dbus_service_property
871
decorator to expose methods as D-Bus properties. It exposes the
872
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
"""
874
875
@staticmethod
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
878
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
881
"""
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
883
False)
884
885
def _get_all_dbus_things(self, thing):
886
"""Returns a generator of (name, attribute) pairs
887
"""
888
return ((getattr(athing.__get__(self), "_dbus_name",
889
name),
890
athing.__get__(self))
891
for cls in self.__class__.__mro__
892
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
895
896
def _get_dbus_property(self, interface_name, property_name):
897
"""Returns a bound method if one exists which is a D-Bus
898
property with the specified name and interface.
899
"""
900
for cls in self.__class__.__mro__:
901
for name, value in (inspect.getmembers
902
(cls,
903
self._is_dbus_thing("property"))):
904
if (value._dbus_name == property_name
905
and value._dbus_interface == interface_name):
906
return value.__get__(self)
907
908
# No such property
909
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
+ interface_name + "."
911
+ property_name)
912
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
914
out_signature="v")
915
def Get(self, interface_name, property_name):
916
"""Standard D-Bus property Get() method, see D-Bus standard.
917
"""
918
prop = self._get_dbus_property(interface_name, property_name)
919
if prop._dbus_access == "write":
920
raise DBusPropertyAccessException(property_name)
921
value = prop()
922
if not hasattr(value, "variant_level"):
923
return value
924
return type(value)(value, variant_level=value.variant_level+1)
925
926
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
927
def Set(self, interface_name, property_name, value):
928
"""Standard D-Bus property Set() method, see D-Bus standard.
929
"""
930
prop = self._get_dbus_property(interface_name, property_name)
931
if prop._dbus_access == "read":
932
raise DBusPropertyAccessException(property_name)
933
if prop._dbus_get_args_options["byte_arrays"]:
934
# The byte_arrays option is not supported yet on
935
# signatures other than "ay".
936
if prop._dbus_signature != "ay":
937
raise ValueError("Byte arrays not supported for non-"
938
"'ay' signature {0!r}"
939
.format(prop._dbus_signature))
940
value = dbus.ByteArray(b''.join(chr(byte)
941
for byte in value))
942
prop(value)
943
944
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
945
out_signature="a{sv}")
946
def GetAll(self, interface_name):
947
"""Standard D-Bus property GetAll() method, see D-Bus
948
standard.
949
950
Note: Will not include properties with access="write".
951
"""
952
properties = {}
953
for name, prop in self._get_all_dbus_things("property"):
954
if (interface_name
955
and interface_name != prop._dbus_interface):
956
# Interface non-empty but did not match
957
continue
958
# Ignore write-only properties
959
if prop._dbus_access == "write":
960
continue
961
value = prop()
962
if not hasattr(value, "variant_level"):
963
properties[name] = value
964
continue
965
properties[name] = type(value)(value, variant_level=
966
value.variant_level+1)
967
return dbus.Dictionary(properties, signature="sv")
968
969
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
out_signature="s",
971
path_keyword='object_path',
972
connection_keyword='connection')
973
def Introspect(self, object_path, connection):
974
"""Overloading of standard D-Bus method.
975
976
Inserts property tags and interface annotation tags.
977
"""
978
xmlstring = dbus.service.Object.Introspect(self, object_path,
979
connection)
980
try:
981
document = xml.dom.minidom.parseString(xmlstring)
982
def make_tag(document, name, prop):
983
e = document.createElement("property")
984
e.setAttribute("name", name)
985
e.setAttribute("type", prop._dbus_signature)
986
e.setAttribute("access", prop._dbus_access)
987
return e
988
for if_tag in document.getElementsByTagName("interface"):
989
# Add property tags
990
for tag in (make_tag(document, name, prop)
991
for name, prop
992
in self._get_all_dbus_things("property")
993
if prop._dbus_interface
994
== if_tag.getAttribute("name")):
995
if_tag.appendChild(tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
999
annots = dict()
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr
1006
(prop,
1007
"_dbus_annotations",
1008
{}))
1009
for name, value in annots.iteritems():
1010
ann_tag = document.createElement(
1011
"annotation")
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().iteritems()
1019
for name, annotations in
1020
self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1022
)).iteritems():
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
1027
# Add the names to the return values for the
1028
# "org.freedesktop.DBus.Properties" methods
1029
if (if_tag.getAttribute("name")
1030
== "org.freedesktop.DBus.Properties"):
1031
for cn in if_tag.getElementsByTagName("method"):
1032
if cn.getAttribute("name") == "Get":
1033
for arg in cn.getElementsByTagName("arg"):
1034
if (arg.getAttribute("direction")
1035
== "out"):
1036
arg.setAttribute("name", "value")
1037
elif cn.getAttribute("name") == "GetAll":
1038
for arg in cn.getElementsByTagName("arg"):
1039
if (arg.getAttribute("direction")
1040
== "out"):
1041
arg.setAttribute("name", "props")
1042
xmlstring = document.toxml("utf-8")
1043
document.unlink()
1044
except (AttributeError, xml.dom.DOMException,
1045
xml.parsers.expat.ExpatError) as error:
1046
logger.error("Failed to override Introspection method",
1047
exc_info=error)
1048
return xmlstring
1049
1050
1051
def datetime_to_dbus(dt, variant_level=0):
1052
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
if dt is None:
1054
return dbus.String("", variant_level = variant_level)
1055
return dbus.String(dt.isoformat(),
1056
variant_level=variant_level)
1057
1058
1059
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1060
"""A class decorator; applied to a subclass of
1061
dbus.service.Object, it will add alternate D-Bus attributes with
1062
interface names according to the "alt_interface_names" mapping.
1063
Usage:
1064
1065
@alternate_dbus_interfaces({"org.example.Interface":
1066
"net.example.AlternateInterface"})
1067
class SampleDBusObject(dbus.service.Object):
1068
@dbus.service.method("org.example.Interface")
1069
def SampleDBusMethod():
1070
pass
1071
1072
The above "SampleDBusMethod" on "SampleDBusObject" will be
1073
reachable via two interfaces: "org.example.Interface" and
1074
"net.example.AlternateInterface", the latter of which will have
1075
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1076
"true", unless "deprecate" is passed with a False value.
1077
1078
This works for methods and signals, and also for D-Bus properties
1079
(from DBusObjectWithProperties) and interfaces (from the
1080
dbus_interface_annotations decorator).
1081
"""
1082
def wrapper(cls):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.iteritems()):
1085
attr = {}
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
1089
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
# with the wrong interface name
1091
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface
1093
.startswith(orig_interface_name)):
1094
continue
1095
# Create an alternate D-Bus interface name based on
1096
# the current name
1097
alt_interface = (attribute._dbus_interface
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1100
interface_names.add(alt_interface)
1101
# Is this a D-Bus signal?
1102
if getattr(attribute, "_dbus_is_signal", False):
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
1106
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))["func"]
1108
.cell_contents)
1109
# Create a new, but exactly alike, function
1110
# object, and decorate it to be a new D-Bus signal
1111
# with the alternate D-Bus interface name
1112
new_function = (dbus.service.signal
1113
(alt_interface,
1114
attribute._dbus_signature)
1115
(types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)))
1121
# Copy annotations, if any
1122
try:
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1125
except AttributeError:
1126
pass
1127
# Define a creator of a function to call both the
1128
# original and alternate functions, so both the
1129
# original and alternate signals gets sent when
1130
# the function is called
1131
def fixscope(func1, func2):
1132
"""This function is a scope container to pass
1133
func1 and func2 to the "call_both" function
1134
outside of its arguments"""
1135
def call_both(*args, **kwargs):
1136
"""This function will emit two D-Bus
1137
signals by calling func1 and func2"""
1138
func1(*args, **kwargs)
1139
func2(*args, **kwargs)
1140
return call_both
1141
# Create the "call_both" function and add it to
1142
# the class
1143
attr[attrname] = fixscope(attribute, new_function)
1144
# Is this a D-Bus method?
1145
elif getattr(attribute, "_dbus_is_method", False):
1146
# Create a new, but exactly alike, function
1147
# object. Decorate it to be a new D-Bus method
1148
# with the alternate D-Bus interface name. Add it
1149
# to the class.
1150
attr[attrname] = (dbus.service.method
1151
(alt_interface,
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1154
(types.FunctionType
1155
(attribute.func_code,
1156
attribute.func_globals,
1157
attribute.func_name,
1158
attribute.func_defaults,
1159
attribute.func_closure)))
1160
# Copy annotations, if any
1161
try:
1162
attr[attrname]._dbus_annotations = (
1163
dict(attribute._dbus_annotations))
1164
except AttributeError:
1165
pass
1166
# Is this a D-Bus property?
1167
elif getattr(attribute, "_dbus_is_property", False):
1168
# Create a new, but exactly alike, function
1169
# object, and decorate it to be a new D-Bus
1170
# property with the alternate D-Bus interface
1171
# name. Add it to the class.
1172
attr[attrname] = (dbus_service_property
1173
(alt_interface,
1174
attribute._dbus_signature,
1175
attribute._dbus_access,
1176
attribute
1177
._dbus_get_args_options
1178
["byte_arrays"])
1179
(types.FunctionType
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1185
# Copy annotations, if any
1186
try:
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1189
except AttributeError:
1190
pass
1191
# Is this a D-Bus interface?
1192
elif getattr(attribute, "_dbus_is_interface", False):
1193
# Create a new, but exactly alike, function
1194
# object. Decorate it to be a new D-Bus interface
1195
# with the alternate D-Bus interface name. Add it
1196
# to the class.
1197
attr[attrname] = (dbus_interface_annotations
1198
(alt_interface)
1199
(types.FunctionType
1200
(attribute.func_code,
1201
attribute.func_globals,
1202
attribute.func_name,
1203
attribute.func_defaults,
1204
attribute.func_closure)))
1205
if deprecate:
1206
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1208
for interface_name in interface_names:
1209
@dbus_interface_annotations(interface_name)
1210
def func(self):
1211
return { "org.freedesktop.DBus.Deprecated":
1212
"true" }
1213
# Find an unused name
1214
for aname in (iname.format(i)
1215
for i in itertools.count()):
1216
if aname not in attr:
1217
attr[aname] = func
1218
break
1219
if interface_names:
1220
# Replace the class with a new subclass of it with
1221
# methods, signals, etc. as created above.
1222
cls = type(b"{0}Alternate".format(cls.__name__),
1223
(cls,), attr)
1224
return cls
1225
return wrapper
1226
1227
1228
@alternate_dbus_interfaces({"se.recompile.Mandos":
1229
"se.bsnet.fukt.Mandos"})
1230
class ClientDBus(Client, DBusObjectWithProperties):
1231
"""A Client class using D-Bus
1232
1233
Attributes:
1234
dbus_object_path: dbus.ObjectPath
1235
bus: dbus.SystemBus()
1236
"""
1237
1238
runtime_expansions = (Client.runtime_expansions
1239
+ ("dbus_object_path",))
1240
1241
# dbus.service.Object doesn't use super(), so we can't either.
1242
1243
def __init__(self, bus = None, *args, **kwargs):
1244
self.bus = bus
1245
Client.__init__(self, *args, **kwargs)
1246
# Only now, when this client is initialized, can it show up on
1247
# the D-Bus
1248
client_object_name = unicode(self.name).translate(
1249
{ord("."): ord("_"),
1250
ord("-"): ord("_")})
1251
self.dbus_object_path = (dbus.ObjectPath
1252
("/clients/" + client_object_name))
1253
DBusObjectWithProperties.__init__(self, self.bus,
1254
self.dbus_object_path)
1255
1256
def notifychangeproperty(transform_func,
1257
dbus_name, type_func=lambda x: x,
1258
variant_level=1):
1259
""" Modify a variable so that it's a property which announces
1260
its changes to DBus.
1261
1262
transform_fun: Function that takes a value and a variant_level
1263
and transforms it to a D-Bus type.
1264
dbus_name: D-Bus name of the variable
1265
type_func: Function that transform the value before sending it
1266
to the D-Bus. Default: no transform
1267
variant_level: D-Bus variant level. Default: 1
1268
"""
1269
attrname = "_{0}".format(dbus_name)
1270
def setter(self, value):
1271
if hasattr(self, "dbus_object_path"):
1272
if (not hasattr(self, attrname) or
1273
type_func(getattr(self, attrname, None))
1274
!= type_func(value)):
1275
dbus_value = transform_func(type_func(value),
1276
variant_level
1277
=variant_level)
1278
self.PropertyChanged(dbus.String(dbus_name),
1279
dbus_value)
1280
setattr(self, attrname, value)
1281
1282
return property(lambda self: getattr(self, attrname), setter)
1283
1284
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1285
approvals_pending = notifychangeproperty(dbus.Boolean,
1286
"ApprovalPending",
1287
type_func = bool)
1288
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1289
last_enabled = notifychangeproperty(datetime_to_dbus,
1290
"LastEnabled")
1291
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1292
type_func = lambda checker:
1293
checker is not None)
1294
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1295
"LastCheckedOK")
1296
last_checker_status = notifychangeproperty(dbus.Int16,
1297
"LastCheckerStatus")
1298
last_approval_request = notifychangeproperty(
1299
datetime_to_dbus, "LastApprovalRequest")
1300
approved_by_default = notifychangeproperty(dbus.Boolean,
1301
"ApprovedByDefault")
1302
approval_delay = notifychangeproperty(dbus.UInt64,
1303
"ApprovalDelay",
1304
type_func =
1305
timedelta_to_milliseconds)
1306
approval_duration = notifychangeproperty(
1307
dbus.UInt64, "ApprovalDuration",
1308
type_func = timedelta_to_milliseconds)
1309
host = notifychangeproperty(dbus.String, "Host")
1310
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1311
type_func =
1312
timedelta_to_milliseconds)
1313
extended_timeout = notifychangeproperty(
1314
dbus.UInt64, "ExtendedTimeout",
1315
type_func = timedelta_to_milliseconds)
1316
interval = notifychangeproperty(dbus.UInt64,
1317
"Interval",
1318
type_func =
1319
timedelta_to_milliseconds)
1320
checker_command = notifychangeproperty(dbus.String, "Checker")
1321
1322
del notifychangeproperty
1323
1324
def __del__(self, *args, **kwargs):
1325
try:
1326
self.remove_from_connection()
1327
except LookupError:
1328
pass
1329
if hasattr(DBusObjectWithProperties, "__del__"):
1330
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1331
Client.__del__(self, *args, **kwargs)
1332
1333
def checker_callback(self, pid, condition, command,
1334
*args, **kwargs):
1335
self.checker_callback_tag = None
1336
self.checker = None
1337
if os.WIFEXITED(condition):
1338
exitstatus = os.WEXITSTATUS(condition)
1339
# Emit D-Bus signal
1340
self.CheckerCompleted(dbus.Int16(exitstatus),
1341
dbus.Int64(condition),
1342
dbus.String(command))
1343
else:
1344
# Emit D-Bus signal
1345
self.CheckerCompleted(dbus.Int16(-1),
1346
dbus.Int64(condition),
1347
dbus.String(command))
1348
1349
return Client.checker_callback(self, pid, condition, command,
1350
*args, **kwargs)
1351
1352
def start_checker(self, *args, **kwargs):
1353
old_checker = self.checker
1354
if self.checker is not None:
1355
old_checker_pid = self.checker.pid
1356
else:
1357
old_checker_pid = None
1358
r = Client.start_checker(self, *args, **kwargs)
1359
# Only if new checker process was started
1360
if (self.checker is not None
1361
and old_checker_pid != self.checker.pid):
1362
# Emit D-Bus signal
1363
self.CheckerStarted(self.current_checker_command)
1364
return r
1365
1366
def _reset_approved(self):
1367
self.approved = None
1368
return False
1369
1370
def approve(self, value=True):
1371
self.approved = value
1372
gobject.timeout_add(timedelta_to_milliseconds
1373
(self.approval_duration),
1374
self._reset_approved)
1375
self.send_changedstate()
1376
1377
## D-Bus methods, signals & properties
1378
_interface = "se.recompile.Mandos.Client"
1379
1380
## Interfaces
1381
1382
@dbus_interface_annotations(_interface)
1383
def _foo(self):
1384
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1385
"false"}
1386
1387
## Signals
1388
1389
# CheckerCompleted - signal
1390
@dbus.service.signal(_interface, signature="nxs")
1391
def CheckerCompleted(self, exitcode, waitstatus, command):
1392
"D-Bus signal"
1393
pass
1394
1395
# CheckerStarted - signal
1396
@dbus.service.signal(_interface, signature="s")
1397
def CheckerStarted(self, command):
1398
"D-Bus signal"
1399
pass
1400
1401
# PropertyChanged - signal
1402
@dbus.service.signal(_interface, signature="sv")
1403
def PropertyChanged(self, property, value):
1404
"D-Bus signal"
1405
pass
1406
1407
# GotSecret - signal
1408
@dbus.service.signal(_interface)
1409
def GotSecret(self):
1410
"""D-Bus signal
1411
Is sent after a successful transfer of secret from the Mandos
1412
server to mandos-client
1413
"""
1414
pass
1415
1416
# Rejected - signal
1417
@dbus.service.signal(_interface, signature="s")
1418
def Rejected(self, reason):
1419
"D-Bus signal"
1420
pass
1421
1422
# NeedApproval - signal
1423
@dbus.service.signal(_interface, signature="tb")
1424
def NeedApproval(self, timeout, default):
1425
"D-Bus signal"
1426
return self.need_approval()
1427
1428
## Methods
1429
1430
# Approve - method
1431
@dbus.service.method(_interface, in_signature="b")
1432
def Approve(self, value):
1433
self.approve(value)
1434
1435
# CheckedOK - method
1436
@dbus.service.method(_interface)
1437
def CheckedOK(self):
1438
self.checked_ok()
1439
1440
# Enable - method
1441
@dbus.service.method(_interface)
1442
def Enable(self):
1443
"D-Bus method"
1444
self.enable()
1445
1446
# StartChecker - method
1447
@dbus.service.method(_interface)
1448
def StartChecker(self):
1449
"D-Bus method"
1450
self.start_checker()
1451
1452
# Disable - method
1453
@dbus.service.method(_interface)
1454
def Disable(self):
1455
"D-Bus method"
1456
self.disable()
1457
1458
# StopChecker - method
1459
@dbus.service.method(_interface)
1460
def StopChecker(self):
1461
self.stop_checker()
1462
1463
## Properties
1464
1465
# ApprovalPending - property
1466
@dbus_service_property(_interface, signature="b", access="read")
1467
def ApprovalPending_dbus_property(self):
1468
return dbus.Boolean(bool(self.approvals_pending))
1469
1470
# ApprovedByDefault - property
1471
@dbus_service_property(_interface, signature="b",
1472
access="readwrite")
1473
def ApprovedByDefault_dbus_property(self, value=None):
1474
if value is None: # get
1475
return dbus.Boolean(self.approved_by_default)
1476
self.approved_by_default = bool(value)
1477
1478
# ApprovalDelay - property
1479
@dbus_service_property(_interface, signature="t",
1480
access="readwrite")
1481
def ApprovalDelay_dbus_property(self, value=None):
1482
if value is None: # get
1483
return dbus.UInt64(self.approval_delay_milliseconds())
1484
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1485
1486
# ApprovalDuration - property
1487
@dbus_service_property(_interface, signature="t",
1488
access="readwrite")
1489
def ApprovalDuration_dbus_property(self, value=None):
1490
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1492
self.approval_duration))
1493
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1494
1495
# Name - property
1496
@dbus_service_property(_interface, signature="s", access="read")
1497
def Name_dbus_property(self):
1498
return dbus.String(self.name)
1499
1500
# Fingerprint - property
1501
@dbus_service_property(_interface, signature="s", access="read")
1502
def Fingerprint_dbus_property(self):
1503
return dbus.String(self.fingerprint)
1504
1505
# Host - property
1506
@dbus_service_property(_interface, signature="s",
1507
access="readwrite")
1508
def Host_dbus_property(self, value=None):
1509
if value is None: # get
1510
return dbus.String(self.host)
1511
self.host = unicode(value)
1512
1513
# Created - property
1514
@dbus_service_property(_interface, signature="s", access="read")
1515
def Created_dbus_property(self):
1516
return datetime_to_dbus(self.created)
1517
1518
# LastEnabled - property
1519
@dbus_service_property(_interface, signature="s", access="read")
1520
def LastEnabled_dbus_property(self):
1521
return datetime_to_dbus(self.last_enabled)
1522
1523
# Enabled - property
1524
@dbus_service_property(_interface, signature="b",
1525
access="readwrite")
1526
def Enabled_dbus_property(self, value=None):
1527
if value is None: # get
1528
return dbus.Boolean(self.enabled)
1529
if value:
1530
self.enable()
1531
else:
1532
self.disable()
1533
1534
# LastCheckedOK - property
1535
@dbus_service_property(_interface, signature="s",
1536
access="readwrite")
1537
def LastCheckedOK_dbus_property(self, value=None):
1538
if value is not None:
1539
self.checked_ok()
1540
return
1541
return datetime_to_dbus(self.last_checked_ok)
1542
1543
# LastCheckerStatus - property
1544
@dbus_service_property(_interface, signature="n",
1545
access="read")
1546
def LastCheckerStatus_dbus_property(self):
1547
return dbus.Int16(self.last_checker_status)
1548
1549
# Expires - property
1550
@dbus_service_property(_interface, signature="s", access="read")
1551
def Expires_dbus_property(self):
1552
return datetime_to_dbus(self.expires)
1553
1554
# LastApprovalRequest - property
1555
@dbus_service_property(_interface, signature="s", access="read")
1556
def LastApprovalRequest_dbus_property(self):
1557
return datetime_to_dbus(self.last_approval_request)
1558
1559
# Timeout - property
1560
@dbus_service_property(_interface, signature="t",
1561
access="readwrite")
1562
def Timeout_dbus_property(self, value=None):
1563
if value is None: # get
1564
return dbus.UInt64(self.timeout_milliseconds())
1565
old_timeout = self.timeout
1566
self.timeout = datetime.timedelta(0, 0, 0, value)
1567
# Reschedule disabling
1568
if self.enabled:
1569
now = datetime.datetime.utcnow()
1570
self.expires += self.timeout - old_timeout
1571
if self.expires <= now:
1572
# The timeout has passed
1573
self.disable()
1574
else:
1575
if (getattr(self, "disable_initiator_tag", None)
1576
is None):
1577
return
1578
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1582
self.disable))
1583
1584
# ExtendedTimeout - property
1585
@dbus_service_property(_interface, signature="t",
1586
access="readwrite")
1587
def ExtendedTimeout_dbus_property(self, value=None):
1588
if value is None: # get
1589
return dbus.UInt64(self.extended_timeout_milliseconds())
1590
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1591
1592
# Interval - property
1593
@dbus_service_property(_interface, signature="t",
1594
access="readwrite")
1595
def Interval_dbus_property(self, value=None):
1596
if value is None: # get
1597
return dbus.UInt64(self.interval_milliseconds())
1598
self.interval = datetime.timedelta(0, 0, 0, value)
1599
if getattr(self, "checker_initiator_tag", None) is None:
1600
return
1601
if self.enabled:
1602
# Reschedule checker run
1603
gobject.source_remove(self.checker_initiator_tag)
1604
self.checker_initiator_tag = (gobject.timeout_add
1605
(value, self.start_checker))
1606
self.start_checker() # Start one now, too
1607
1608
# Checker - property
1609
@dbus_service_property(_interface, signature="s",
1610
access="readwrite")
1611
def Checker_dbus_property(self, value=None):
1612
if value is None: # get
1613
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
1615
1616
# CheckerRunning - property
1617
@dbus_service_property(_interface, signature="b",
1618
access="readwrite")
1619
def CheckerRunning_dbus_property(self, value=None):
1620
if value is None: # get
1621
return dbus.Boolean(self.checker is not None)
1622
if value:
1623
self.start_checker()
1624
else:
1625
self.stop_checker()
1626
1627
# ObjectPath - property
1628
@dbus_service_property(_interface, signature="o", access="read")
1629
def ObjectPath_dbus_property(self):
1630
return self.dbus_object_path # is already a dbus.ObjectPath
1631
1632
# Secret = property
1633
@dbus_service_property(_interface, signature="ay",
1634
access="write", byte_arrays=True)
1635
def Secret_dbus_property(self, value):
1636
self.secret = str(value)
1637
1638
del _interface
1639
1640
1641
class ProxyClient(object):
1642
def __init__(self, child_pipe, fpr, address):
1643
self._pipe = child_pipe
1644
self._pipe.send(('init', fpr, address))
1645
if not self._pipe.recv():
1646
raise KeyError()
1647
1648
def __getattribute__(self, name):
1649
if name == '_pipe':
1650
return super(ProxyClient, self).__getattribute__(name)
1651
self._pipe.send(('getattr', name))
1652
data = self._pipe.recv()
1653
if data[0] == 'data':
1654
return data[1]
1655
if data[0] == 'function':
1656
def func(*args, **kwargs):
1657
self._pipe.send(('funcall', name, args, kwargs))
1658
return self._pipe.recv()[1]
1659
return func
1660
1661
def __setattr__(self, name, value):
1662
if name == '_pipe':
1663
return super(ProxyClient, self).__setattr__(name, value)
1664
self._pipe.send(('setattr', name, value))
1665
1666
1667
class ClientHandler(socketserver.BaseRequestHandler, object):
1668
"""A class to handle client connections.
1669
1670
Instantiated once for each connection to handle it.
441
1671
Note: This will run in its own forked process."""
442
1672
443
1673
def handle(self):
444
logger.info(u"TCP connection from: %s",
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1674
with contextlib.closing(self.server.child_pipe) as child_pipe:
1675
logger.info("TCP connection from: %s",
1676
unicode(self.client_address))
1677
logger.debug("Pipe FD: %d",
1678
self.server.child_pipe.fileno())
1679
1680
session = (gnutls.connection
1681
.ClientSession(self.request,
1682
gnutls.connection
1683
.X509Credentials()))
1684
1685
# Note: gnutls.connection.X509Credentials is really a
1686
# generic GnuTLS certificate credentials object so long as
1687
# no X.509 keys are added to it. Therefore, we can use it
1688
# here despite using OpenPGP certificates.
1689
1690
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1691
# "+AES-256-CBC", "+SHA1",
1692
# "+COMP-NULL", "+CTYPE-OPENPGP",
1693
# "+DHE-DSS"))
1694
# Use a fallback default, since this MUST be set.
1695
priority = self.server.gnutls_priority
1696
if priority is None:
1697
priority = "NORMAL"
1698
(gnutls.library.functions
1699
.gnutls_priority_set_direct(session._c_object,
1700
priority, None))
1701
1702
# Start communication using the Mandos protocol
1703
# Get protocol number
1704
line = self.request.makefile().readline()
1705
logger.debug("Protocol version: %r", line)
1706
try:
1707
if int(line.strip().split()[0]) > 1:
1708
raise RuntimeError(line)
1709
except (ValueError, IndexError, RuntimeError) as error:
1710
logger.error("Unknown protocol version: %s", error)
1711
return
1712
1713
# Start GnuTLS connection
1714
try:
1715
session.handshake()
1716
except gnutls.errors.GNUTLSError as error:
1717
logger.warning("Handshake failed: %s", error)
1718
# Do not run session.bye() here: the session is not
1719
# established. Just abandon the request.
1720
return
1721
logger.debug("Handshake succeeded")
1722
1723
approval_required = False
1724
try:
1725
try:
1726
fpr = self.fingerprint(self.peer_certificate
1727
(session))
1728
except (TypeError,
1729
gnutls.errors.GNUTLSError) as error:
1730
logger.warning("Bad certificate: %s", error)
1731
return
1732
logger.debug("Fingerprint: %s", fpr)
1733
1734
try:
1735
client = ProxyClient(child_pipe, fpr,
1736
self.client_address)
1737
except KeyError:
1738
return
1739
1740
if client.approval_delay:
1741
delay = client.approval_delay
1742
client.approvals_pending += 1
1743
approval_required = True
1744
1745
while True:
1746
if not client.enabled:
1747
logger.info("Client %s is disabled",
1748
client.name)
1749
if self.server.use_dbus:
1750
# Emit D-Bus signal
1751
client.Rejected("Disabled")
1752
return
1753
1754
if client.approved or not client.approval_delay:
1755
#We are approved or approval is disabled
1756
break
1757
elif client.approved is None:
1758
logger.info("Client %s needs approval",
1759
client.name)
1760
if self.server.use_dbus:
1761
# Emit D-Bus signal
1762
client.NeedApproval(
1763
client.approval_delay_milliseconds(),
1764
client.approved_by_default)
1765
else:
1766
logger.warning("Client %s was not approved",
1767
client.name)
1768
if self.server.use_dbus:
1769
# Emit D-Bus signal
1770
client.Rejected("Denied")
1771
return
1772
1773
#wait until timeout or approved
1774
time = datetime.datetime.now()
1775
client.changedstate.acquire()
1776
client.changedstate.wait(
1777
float(timedelta_to_milliseconds(delay)
1778
/ 1000))
1779
client.changedstate.release()
1780
time2 = datetime.datetime.now()
1781
if (time2 - time) >= delay:
1782
if not client.approved_by_default:
1783
logger.warning("Client %s timed out while"
1784
" waiting for approval",
1785
client.name)
1786
if self.server.use_dbus:
1787
# Emit D-Bus signal
1788
client.Rejected("Approval timed out")
1789
return
1790
else:
1791
break
1792
else:
1793
delay -= time2 - time
1794
1795
sent_size = 0
1796
while sent_size < len(client.secret):
1797
try:
1798
sent = session.send(client.secret[sent_size:])
1799
except gnutls.errors.GNUTLSError as error:
1800
logger.warning("gnutls send failed",
1801
exc_info=error)
1802
return
1803
logger.debug("Sent: %d, remaining: %d",
1804
sent, len(client.secret)
1805
- (sent_size + sent))
1806
sent_size += sent
1807
1808
logger.info("Sending secret to %s", client.name)
1809
# bump the timeout using extended_timeout
1810
client.bump_timeout(client.extended_timeout)
1811
if self.server.use_dbus:
1812
# Emit D-Bus signal
1813
client.GotSecret()
1814
1815
finally:
1816
if approval_required:
1817
client.approvals_pending -= 1
1818
try:
1819
session.bye()
1820
except gnutls.errors.GNUTLSError as error:
1821
logger.warning("GnuTLS bye failed",
1822
exc_info=error)
1823
1824
@staticmethod
1825
def peer_certificate(session):
1826
"Return the peer's OpenPGP certificate as a bytestring"
1827
# If not an OpenPGP certificate...
1828
if (gnutls.library.functions
1829
.gnutls_certificate_type_get(session._c_object)
1830
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1831
# ...do the normal thing
1832
return session.peer_certificate
1833
list_size = ctypes.c_uint(1)
1834
cert_list = (gnutls.library.functions
1835
.gnutls_certificate_get_peers
1836
(session._c_object, ctypes.byref(list_size)))
1837
if not bool(cert_list) and list_size.value != 0:
1838
raise gnutls.errors.GNUTLSError("error getting peer"
1839
" certificate")
1840
if list_size.value == 0:
1841
return None
1842
cert = cert_list[0]
1843
return ctypes.string_at(cert.data, cert.size)
1844
1845
@staticmethod
1846
def fingerprint(openpgp):
1847
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1848
# New GnuTLS "datum" with the OpenPGP public key
1849
datum = (gnutls.library.types
1850
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1851
ctypes.POINTER
1852
(ctypes.c_ubyte)),
1853
ctypes.c_uint(len(openpgp))))
1854
# New empty GnuTLS certificate
1855
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1858
# Import the OpenPGP public key into the certificate
1859
(gnutls.library.functions
1860
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1861
gnutls.library.constants
1862
.GNUTLS_OPENPGP_FMT_RAW))
1863
# Verify the self signature in the key
1864
crtverify = ctypes.c_uint()
1865
(gnutls.library.functions
1866
.gnutls_openpgp_crt_verify_self(crt, 0,
1867
ctypes.byref(crtverify)))
1868
if crtverify.value != 0:
1869
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1870
raise (gnutls.errors.CertificateSecurityError
1871
("Verify failed"))
1872
# New buffer for the fingerprint
1873
buf = ctypes.create_string_buffer(20)
1874
buf_len = ctypes.c_size_t()
1875
# Get the fingerprint from the certificate into the buffer
1876
(gnutls.library.functions
1877
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1878
ctypes.byref(buf_len)))
1879
# Deinit the certificate
1880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1881
# Convert the buffer to a Python bytestring
1882
fpr = ctypes.string_at(buf, buf_len.value)
1883
# Convert the bytestring to hexadecimal notation
1884
hex_fpr = binascii.hexlify(fpr).upper()
1885
return hex_fpr
1886
1887
1888
class MultiprocessingMixIn(object):
1889
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1890
def sub_process_main(self, request, address):
1891
try:
1892
self.finish_request(request, address)
1893
except Exception:
1894
self.handle_error(request, address)
1895
self.close_request(request)
1896
1897
def process_request(self, request, address):
1898
"""Start a new process to process the request."""
1899
proc = multiprocessing.Process(target = self.sub_process_main,
1900
args = (request, address))
1901
proc.start()
1902
return proc
1903
1904
1905
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1906
""" adds a pipe to the MixIn """
1907
def process_request(self, request, client_address):
1908
"""Overrides and wraps the original process_request().
1909
1910
This function creates a new pipe in self.pipe
1911
"""
1912
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1913
1914
proc = MultiprocessingMixIn.process_request(self, request,
1915
client_address)
1916
self.child_pipe.close()
1917
self.add_pipe(parent_pipe, proc)
1918
1919
def add_pipe(self, parent_pipe, proc):
1920
"""Dummy function; override as necessary"""
1921
raise NotImplementedError()
1922
1923
1924
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1925
socketserver.TCPServer, object):
1926
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1927
517
1928
Attributes:
518
settings: Server settings
519
clients: Set() of Client objects
1929
enabled: Boolean; whether this server is activated yet
1930
interface: None or a network interface name (string)
1931
use_ipv6: Boolean; to use IPv6 or not
520
1932
"""
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1933
def __init__(self, server_address, RequestHandlerClass,
1934
interface=None, use_ipv6=True, socketfd=None):
1935
"""If socketfd is set, use that file descriptor instead of
1936
creating a new one with socket.socket().
1937
"""
1938
self.interface = interface
1939
if use_ipv6:
1940
self.address_family = socket.AF_INET6
1941
if socketfd is not None:
1942
# Save the file descriptor
1943
self.socketfd = socketfd
1944
# Save the original socket.socket() function
1945
self.socket_socket = socket.socket
1946
# To implement --socket, we monkey patch socket.socket.
1947
#
1948
# (When socketserver.TCPServer is a new-style class, we
1949
# could make self.socket into a property instead of monkey
1950
# patching socket.socket.)
1951
#
1952
# Create a one-time-only replacement for socket.socket()
1953
@functools.wraps(socket.socket)
1954
def socket_wrapper(*args, **kwargs):
1955
# Restore original function so subsequent calls are
1956
# not affected.
1957
socket.socket = self.socket_socket
1958
del self.socket_socket
1959
# This time only, return a new socket object from the
1960
# saved file descriptor.
1961
return socket.fromfd(self.socketfd, *args, **kwargs)
1962
# Replace socket.socket() function with wrapper
1963
socket.socket = socket_wrapper
1964
# The socketserver.TCPServer.__init__ will call
1965
# socket.socket(), which might be our replacement,
1966
# socket_wrapper(), if socketfd was set.
1967
socketserver.TCPServer.__init__(self, server_address,
1968
RequestHandlerClass)
1969
530
1970
def server_bind(self):
531
1971
"""This overrides the normal server_bind() function
532
1972
to bind to an interface if one was specified, and also NOT to
533
1973
bind to an address or port if they were not specified."""
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1974
if self.interface is not None:
1975
if SO_BINDTODEVICE is None:
1976
logger.error("SO_BINDTODEVICE does not exist;"
1977
" cannot bind to interface %s",
1978
self.interface)
1979
else:
1980
try:
1981
self.socket.setsockopt(socket.SOL_SOCKET,
1982
SO_BINDTODEVICE,
1983
str(self.interface + '\0'))
1984
except socket.error as error:
1985
if error.errno == errno.EPERM:
1986
logger.error("No permission to bind to"
1987
" interface %s", self.interface)
1988
elif error.errno == errno.ENOPROTOOPT:
1989
logger.error("SO_BINDTODEVICE not available;"
1990
" cannot bind to interface %s",
1991
self.interface)
1992
elif error.errno == errno.ENODEV:
1993
logger.error("Interface %s does not exist,"
1994
" cannot bind", self.interface)
1995
else:
1996
raise
548
1997
# Only bind(2) the socket if we really need to.
549
1998
if self.server_address[0] or self.server_address[1]:
550
1999
if not self.server_address[0]:
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
2000
if self.address_family == socket.AF_INET6:
2001
any_address = "::" # in6addr_any
2002
else:
2003
any_address = "0.0.0.0" # INADDR_ANY
2004
self.server_address = (any_address,
553
2005
self.server_address[1])
554
2006
elif not self.server_address[1]:
555
2007
self.server_address = (self.server_address[0],
556
2008
0)
557
# if self.settings["interface"]:
2009
# if self.interface:
558
2010
# self.server_address = (self.server_address[0],
559
2011
# 0, # port
560
2012
# 0, # flowinfo
561
2013
# if_nametoindex
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
2014
# (self.interface))
2015
return socketserver.TCPServer.server_bind(self)
2016
2017
2018
class MandosServer(IPv6_TCPServer):
2019
"""Mandos server.
2020
2021
Attributes:
2022
clients: set of Client objects
2023
gnutls_priority GnuTLS priority string
2024
use_dbus: Boolean; to emit D-Bus signals or not
2025
2026
Assumes a gobject.MainLoop event loop.
2027
"""
2028
def __init__(self, server_address, RequestHandlerClass,
2029
interface=None, use_ipv6=True, clients=None,
2030
gnutls_priority=None, use_dbus=True, socketfd=None):
2031
self.enabled = False
2032
self.clients = clients
2033
if self.clients is None:
2034
self.clients = {}
2035
self.use_dbus = use_dbus
2036
self.gnutls_priority = gnutls_priority
2037
IPv6_TCPServer.__init__(self, server_address,
2038
RequestHandlerClass,
2039
interface = interface,
2040
use_ipv6 = use_ipv6,
2041
socketfd = socketfd)
2042
def server_activate(self):
2043
if self.enabled:
2044
return socketserver.TCPServer.server_activate(self)
2045
2046
def enable(self):
2047
self.enabled = True
2048
2049
def add_pipe(self, parent_pipe, proc):
2050
# Call "handle_ipc" for both data and EOF events
2051
gobject.io_add_watch(parent_pipe.fileno(),
2052
gobject.IO_IN | gobject.IO_HUP,
2053
functools.partial(self.handle_ipc,
2054
parent_pipe =
2055
parent_pipe,
2056
proc = proc))
2057
2058
def handle_ipc(self, source, condition, parent_pipe=None,
2059
proc = None, client_object=None):
2060
# error, or the other end of multiprocessing.Pipe has closed
2061
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2062
# Wait for other process to exit
2063
proc.join()
2064
return False
2065
2066
# Read a request from the child
2067
request = parent_pipe.recv()
2068
command = request[0]
2069
2070
if command == 'init':
2071
fpr = request[1]
2072
address = request[2]
2073
2074
for c in self.clients.itervalues():
2075
if c.fingerprint == fpr:
2076
client = c
2077
break
2078
else:
2079
logger.info("Client not found for fingerprint: %s, ad"
2080
"dress: %s", fpr, address)
2081
if self.use_dbus:
2082
# Emit D-Bus signal
2083
mandos_dbus_service.ClientNotFound(fpr,
2084
address[0])
2085
parent_pipe.send(False)
2086
return False
2087
2088
gobject.io_add_watch(parent_pipe.fileno(),
2089
gobject.IO_IN | gobject.IO_HUP,
2090
functools.partial(self.handle_ipc,
2091
parent_pipe =
2092
parent_pipe,
2093
proc = proc,
2094
client_object =
2095
client))
2096
parent_pipe.send(True)
2097
# remove the old hook in favor of the new above hook on
2098
# same fileno
2099
return False
2100
if command == 'funcall':
2101
funcname = request[1]
2102
args = request[2]
2103
kwargs = request[3]
2104
2105
parent_pipe.send(('data', getattr(client_object,
2106
funcname)(*args,
2107
**kwargs)))
2108
2109
if command == 'getattr':
2110
attrname = request[1]
2111
if callable(client_object.__getattribute__(attrname)):
2112
parent_pipe.send(('function',))
2113
else:
2114
parent_pipe.send(('data', client_object
2115
.__getattribute__(attrname)))
2116
2117
if command == 'setattr':
2118
attrname = request[1]
2119
value = request[2]
2120
setattr(client_object, attrname, value)
2121
2122
return True
2123
2124
2125
def rfc3339_duration_to_delta(duration):
2126
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
2128
>>> rfc3339_duration_to_delta("P7D")
2129
datetime.timedelta(7)
2130
>>> rfc3339_duration_to_delta("PT60S")
2131
datetime.timedelta(0, 60)
2132
>>> rfc3339_duration_to_delta("PT60M")
2133
datetime.timedelta(0, 3600)
2134
>>> rfc3339_duration_to_delta("PT24H")
2135
datetime.timedelta(1)
2136
>>> rfc3339_duration_to_delta("P1W")
2137
datetime.timedelta(7)
2138
>>> rfc3339_duration_to_delta("PT5M30S")
2139
datetime.timedelta(0, 330)
2140
>>> rfc3339_duration_to_delta("P1DT3M20S")
2141
datetime.timedelta(1, 200)
2142
"""
2143
2144
# Parsing an RFC 3339 duration with regular expressions is not
2145
# possible - there would have to be multiple places for the same
2146
# values, like seconds. The current code, while more esoteric, is
2147
# cleaner without depending on a parsing library. If Python had a
2148
# built-in library for parsing we would use it, but we'd like to
2149
# avoid excessive use of external libraries.
2150
2151
# New type for defining tokens, syntax, and semantics all-in-one
2152
Token = collections.namedtuple("Token",
2153
("regexp", # To match token; if
2154
# "value" is not None,
2155
# must have a "group"
2156
# containing digits
2157
"value", # datetime.timedelta or
2158
# None
2159
"followers")) # Tokens valid after
2160
# this token
2161
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
token_end = Token(re.compile(r"$"), None, frozenset())
2164
token_second = Token(re.compile(r"(\d+)S"),
2165
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2167
token_minute = Token(re.compile(r"(\d+)M"),
2168
datetime.timedelta(minutes=1),
2169
frozenset((token_second, token_end)))
2170
token_hour = Token(re.compile(r"(\d+)H"),
2171
datetime.timedelta(hours=1),
2172
frozenset((token_minute, token_end)))
2173
token_time = Token(re.compile(r"T"),
2174
None,
2175
frozenset((token_hour, token_minute,
2176
token_second)))
2177
token_day = Token(re.compile(r"(\d+)D"),
2178
datetime.timedelta(days=1),
2179
frozenset((token_time, token_end)))
2180
token_month = Token(re.compile(r"(\d+)M"),
2181
datetime.timedelta(weeks=4),
2182
frozenset((token_day, token_end)))
2183
token_year = Token(re.compile(r"(\d+)Y"),
2184
datetime.timedelta(weeks=52),
2185
frozenset((token_month, token_end)))
2186
token_week = Token(re.compile(r"(\d+)W"),
2187
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2189
token_duration = Token(re.compile(r"P"), None,
2190
frozenset((token_year, token_month,
2191
token_day, token_time,
2192
token_week))),
2193
# Define starting values
2194
value = datetime.timedelta() # Value so far
2195
found_token = None
2196
followers = frozenset(token_duration,) # Following valid tokens
2197
s = duration # String left to parse
2198
# Loop until end token is found
2199
while found_token is not token_end:
2200
# Search for any currently valid tokens
2201
for token in followers:
2202
match = token.regexp.match(s)
2203
if match is not None:
2204
# Token found
2205
if token.value is not None:
2206
# Value found, parse digits
2207
factor = int(match.group(1), 10)
2208
# Add to value so far
2209
value += factor * token.value
2210
# Strip token from string
2211
s = token.regexp.sub("", s, 1)
2212
# Go to found token
2213
found_token = token
2214
# Set valid next tokens
2215
followers = found_token.followers
2216
break
2217
else:
2218
# No currently valid tokens were found
2219
raise ValueError("Invalid RFC 3339 duration")
2220
# End token found
2221
return value
565
2222
566
2223
567
2224
def string_to_delta(interval):
568
2225
"""Parse a string and return a datetime.timedelta
569
2226
570
2227
>>> string_to_delta('7d')
571
2228
datetime.timedelta(7)
572
2229
>>> string_to_delta('60s')
575
2232
datetime.timedelta(0, 3600)
576
2233
>>> string_to_delta('24h')
577
2234
datetime.timedelta(1)
578
>>> string_to_delta(u'1w')
2235
>>> string_to_delta('1w')
579
2236
datetime.timedelta(7)
580
2237
>>> string_to_delta('5m 30s')
581
2238
datetime.timedelta(0, 330)
582
2239
"""
2240
2241
try:
2242
return rfc3339_duration_to_delta(interval)
2243
except ValueError:
2244
pass
2245
583
2246
timevalue = datetime.timedelta(0)
584
2247
for s in interval.split():
585
2248
try:
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
588
if suffix == u"d":
2249
suffix = unicode(s[-1])
2250
value = int(s[:-1])
2251
if suffix == "d":
589
2252
delta = datetime.timedelta(value)
590
elif suffix == u"s":
2253
elif suffix == "s":
591
2254
delta = datetime.timedelta(0, value)
592
elif suffix == u"m":
2255
elif suffix == "m":
593
2256
delta = datetime.timedelta(0, 0, 0, 0, value)
594
elif suffix == u"h":
2257
elif suffix == "h":
595
2258
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
596
elif suffix == u"w":
2259
elif suffix == "w":
597
2260
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
598
2261
else:
599
raise ValueError
600
except (ValueError, IndexError):
601
raise ValueError
2262
raise ValueError("Unknown suffix {0!r}"
2263
.format(suffix))
2264
except IndexError as e:
2265
raise ValueError(*(e.args))
602
2266
timevalue += delta
603
2267
return timevalue
604
2268
605
2269
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
629
def if_nametoindex(interface):
630
"""Call the C function if_nametoindex(), or equivalent"""
631
global if_nametoindex
632
try:
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
637
except (OSError, AttributeError):
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
642
def if_nametoindex(interface):
643
"Get an interface index the hard way, i.e. using fcntl()"
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
650
return interface_index
651
return if_nametoindex(interface)
652
653
654
2270
def daemon(nochdir = False, noclose = False):
655
2271
"""See daemon(3). Standard BSD Unix function.
2272
656
2273
This should really exist as os.daemon, but it doesn't (yet)."""
657
2274
if os.fork():
658
2275
sys.exit()
663
2280
sys.exit()
664
2281
if not noclose:
665
2282
# Close all standard open file descriptors
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2283
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
667
2284
if not stat.S_ISCHR(os.fstat(null).st_mode):
668
2285
raise OSError(errno.ENODEV,
669
"/dev/null not a character device")
2286
"{0} not a character device"
2287
.format(os.devnull))
670
2288
os.dup2(null, sys.stdin.fileno())
671
2289
os.dup2(null, sys.stdout.fileno())
672
2290
os.dup2(null, sys.stderr.fileno())
675
2293
676
2294
677
2295
def main():
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
2296
2297
##################################################################
2298
# Parsing of options, both command line and config file
2299
2300
parser = argparse.ArgumentParser()
2301
parser.add_argument("-v", "--version", action="version",
2302
version = "%(prog)s {0}".format(version),
2303
help="show version number and exit")
2304
parser.add_argument("-i", "--interface", metavar="IF",
2305
help="Bind to interface IF")
2306
parser.add_argument("-a", "--address",
2307
help="Address to listen for requests on")
2308
parser.add_argument("-p", "--port", type=int,
2309
help="Port number to receive requests on")
2310
parser.add_argument("--check", action="store_true",
2311
help="Run self-test")
2312
parser.add_argument("--debug", action="store_true",
2313
help="Debug mode; run in foreground and log"
2314
" to terminal", default=None)
2315
parser.add_argument("--debuglevel", metavar="LEVEL",
2316
help="Debug level for stdout output")
2317
parser.add_argument("--priority", help="GnuTLS"
2318
" priority string (see GnuTLS documentation)")
2319
parser.add_argument("--servicename",
2320
metavar="NAME", help="Zeroconf service name")
2321
parser.add_argument("--configdir",
2322
default="/etc/mandos", metavar="DIR",
2323
help="Directory to search for configuration"
2324
" files")
2325
parser.add_argument("--no-dbus", action="store_false",
2326
dest="use_dbus", help="Do not provide D-Bus"
2327
" system bus interface", default=None)
2328
parser.add_argument("--no-ipv6", action="store_false",
2329
dest="use_ipv6", help="Do not use IPv6",
2330
default=None)
2331
parser.add_argument("--no-restore", action="store_false",
2332
dest="restore", help="Do not restore stored"
2333
" state", default=None)
2334
parser.add_argument("--socket", type=int,
2335
help="Specify a file descriptor to a network"
2336
" socket to use instead of creating one")
2337
parser.add_argument("--statedir", metavar="DIR",
2338
help="Directory to save/restore state in")
2339
parser.add_argument("--foreground", action="store_true",
2340
help="Run in foreground", default=None)
2341
2342
options = parser.parse_args()
702
2343
703
2344
if options.check:
704
2345
import doctest
705
doctest.testmod()
706
sys.exit()
2346
fail_count, test_count = doctest.testmod()
2347
sys.exit(os.EX_OK if fail_count == 0 else 1)
707
2348
708
2349
# Default values for config file for server-global settings
709
2350
server_defaults = { "interface": "",
711
2352
"port": "",
712
2353
"debug": "False",
713
2354
"priority":
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2355
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
715
2356
"servicename": "Mandos",
2357
"use_dbus": "True",
2358
"use_ipv6": "True",
2359
"debuglevel": "",
2360
"restore": "True",
2361
"socket": "",
2362
"statedir": "/var/lib/mandos",
2363
"foreground": "False",
716
2364
}
717
2365
718
2366
# Parse config file for server-global settings
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
2367
server_config = configparser.SafeConfigParser(server_defaults)
720
2368
del server_defaults
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2369
server_config.read(os.path.join(options.configdir,
2370
"mandos.conf"))
722
2371
# Convert the SafeConfigParser object to a dict
723
2372
server_settings = server_config.defaults()
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
2373
# Use the appropriate methods on the non-string config options
2374
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2375
server_settings[option] = server_config.getboolean("DEFAULT",
2376
option)
2377
if server_settings["port"]:
2378
server_settings["port"] = server_config.getint("DEFAULT",
2379
"port")
2380
if server_settings["socket"]:
2381
server_settings["socket"] = server_config.getint("DEFAULT",
2382
"socket")
2383
# Later, stdin will, and stdout and stderr might, be dup'ed
2384
# over with an opened os.devnull. But we don't want this to
2385
# happen with a supplied network socket.
2386
if 0 <= server_settings["socket"] <= 2:
2387
server_settings["socket"] = os.dup(server_settings
2388
["socket"])
727
2389
del server_config
728
2390
729
2391
# Override the settings from the config file with command line
730
2392
# options, if set.
731
2393
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
2394
"priority", "servicename", "configdir",
2395
"use_dbus", "use_ipv6", "debuglevel", "restore",
2396
"statedir", "socket", "foreground"):
733
2397
value = getattr(options, option)
734
2398
if value is not None:
735
2399
server_settings[option] = value
736
2400
del options
2401
# Force all strings to be unicode
2402
for option in server_settings.keys():
2403
if type(server_settings[option]) is str:
2404
server_settings[option] = unicode(server_settings[option])
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
737
2412
# Now we have our good server settings in "server_settings"
738
2413
2414
##################################################################
2415
2416
# For convenience
739
2417
debug = server_settings["debug"]
2418
debuglevel = server_settings["debuglevel"]
2419
use_dbus = server_settings["use_dbus"]
2420
use_ipv6 = server_settings["use_ipv6"]
2421
stored_state_path = os.path.join(server_settings["statedir"],
2422
stored_state_file)
2423
foreground = server_settings["foreground"]
740
2424
741
if not debug:
742
syslogger.setLevel(logging.WARNING)
743
console.setLevel(logging.WARNING)
2425
if debug:
2426
initlogger(debug, logging.DEBUG)
2427
else:
2428
if not debuglevel:
2429
initlogger(debug)
2430
else:
2431
level = getattr(logging, debuglevel.upper())
2432
initlogger(debug, level)
744
2433
745
2434
if server_settings["servicename"] != "Mandos":
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
749
% server_settings["servicename"]))
2435
syslogger.setFormatter(logging.Formatter
2436
('Mandos ({0}) [%(process)d]:'
2437
' %(levelname)s: %(message)s'
2438
.format(server_settings
2439
["servicename"])))
750
2440
751
2441
# Parse config file with clients
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
756
}
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
2442
client_config = configparser.SafeConfigParser(Client
2443
.client_defaults)
758
2444
client_config.read(os.path.join(server_settings["configdir"],
759
2445
"clients.conf"))
760
2446
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
2447
global mandos_dbus_service
2448
mandos_dbus_service = None
2449
2450
tcp_server = MandosServer((server_settings["address"],
2451
server_settings["port"]),
2452
ClientHandler,
2453
interface=(server_settings["interface"]
2454
or None),
2455
use_ipv6=use_ipv6,
2456
gnutls_priority=
2457
server_settings["priority"],
2458
use_dbus=use_dbus,
2459
socketfd=(server_settings["socket"]
2460
or None))
2461
if not foreground:
2462
pidfilename = "/run/mandos.pid"
2463
if not os.path.isdir("/run/."):
2464
pidfilename = "/var/run/mandos.pid"
2465
pidfile = None
2466
try:
2467
pidfile = open(pidfilename, "w")
2468
except IOError as e:
2469
logger.error("Could not open file %r", pidfilename,
2470
exc_info=e)
2471
2472
for name in ("_mandos", "mandos", "nobody"):
2473
try:
2474
uid = pwd.getpwnam(name).pw_uid
2475
gid = pwd.getpwnam(name).pw_gid
2476
break
2477
except KeyError:
2478
continue
2479
else:
2480
uid = 65534
2481
gid = 65534
2482
try:
2483
os.setgid(gid)
2484
os.setuid(uid)
2485
except OSError as error:
2486
if error.errno != errno.EPERM:
2487
raise
2488
2489
if debug:
2490
# Enable all possible GnuTLS debugging
2491
2492
# "Use a log level over 10 to enable all debugging options."
2493
# - GnuTLS manual
2494
gnutls.library.functions.gnutls_global_set_log_level(11)
2495
2496
@gnutls.library.types.gnutls_log_func
2497
def debug_gnutls(level, string):
2498
logger.debug("GnuTLS: %s", string[:-1])
2499
2500
(gnutls.library.functions
2501
.gnutls_global_set_log_function(debug_gnutls))
2502
2503
# Redirect stdin so all checkers get /dev/null
2504
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2505
os.dup2(null, sys.stdin.fileno())
2506
if null > 2:
2507
os.close(null)
2508
2509
# Need to fork before connecting to D-Bus
2510
if not foreground:
2511
# Close all input and output, do double fork, etc.
2512
daemon()
2513
2514
# multiprocessing will use threads, so before we use gobject we
2515
# need to inform gobject that threads will be used.
2516
gobject.threads_init()
767
2517
768
2518
global main_loop
769
global bus
770
global server
771
2519
# From the Avahi example code
772
DBusGMainLoop(set_as_default=True )
2520
DBusGMainLoop(set_as_default=True)
773
2521
main_loop = gobject.MainLoop()
774
2522
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
778
2523
# End of Avahi example code
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
795
796
if debug:
797
# Redirect stdin so all checkers get /dev/null
798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
799
os.dup2(null, sys.stdin.fileno())
800
if null > 2:
801
os.close(null)
802
else:
803
# No console logging
804
logger.removeHandler(console)
805
# Close all input and output, do double fork, etc.
806
daemon()
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
810
try:
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
2524
if use_dbus:
2525
try:
2526
bus_name = dbus.service.BusName("se.recompile.Mandos",
2527
bus, do_not_queue=True)
2528
old_bus_name = (dbus.service.BusName
2529
("se.bsnet.fukt.Mandos", bus,
2530
do_not_queue=True))
2531
except dbus.exceptions.NameExistsException as e:
2532
logger.error("Disabling D-Bus:", exc_info=e)
2533
use_dbus = False
2534
server_settings["use_dbus"] = False
2535
tcp_server.use_dbus = False
2536
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2537
service = AvahiServiceToSyslog(name =
2538
server_settings["servicename"],
2539
servicetype = "_mandos._tcp",
2540
protocol = protocol, bus = bus)
2541
if server_settings["interface"]:
2542
service.interface = (if_nametoindex
2543
(str(server_settings["interface"])))
2544
2545
global multiprocessing_manager
2546
multiprocessing_manager = multiprocessing.Manager()
2547
2548
client_class = Client
2549
if use_dbus:
2550
client_class = functools.partial(ClientDBus, bus = bus)
2551
2552
client_settings = Client.config_parser(client_config)
2553
old_client_settings = {}
2554
clients_data = {}
2555
2556
# This is used to redirect stdout and stderr for checker processes
2557
global wnull
2558
wnull = open(os.devnull, "w") # A writable /dev/null
2559
# Only used if server is running in foreground but not in debug
2560
# mode
2561
if debug or not foreground:
2562
wnull.close()
2563
2564
# Get client data and settings from last running state.
2565
if server_settings["restore"]:
2566
try:
2567
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
2569
(stored_state))
2570
os.remove(stored_state_path)
2571
except IOError as e:
2572
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2575
else:
2576
logger.critical("Could not load persistent state:",
2577
exc_info=e)
2578
raise
2579
except EOFError as e:
2580
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2582
2583
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
2585
# Skip removed clients
2586
if client_name not in client_settings:
2587
continue
2588
2589
# Decide which value to use after restoring saved state.
2590
# We have three different values: Old config file,
2591
# new config file, and saved state.
2592
# New config value takes precedence if it differs from old
2593
# config value, otherwise use saved state.
2594
for name, value in client_settings[client_name].items():
2595
try:
2596
# For each value in new config, check if it
2597
# differs from the old config value (Except for
2598
# the "secret" attribute)
2599
if (name != "secret" and
2600
value != old_client_settings[client_name]
2601
[name]):
2602
client[name] = value
2603
except KeyError:
2604
pass
2605
2606
# Clients who has passed its expire date can still be
2607
# enabled if its last checker was successful. Clients
2608
# whose checker succeeded before we stored its state is
2609
# assumed to have successfully run all checkers during
2610
# downtime.
2611
if client["enabled"]:
2612
if datetime.datetime.utcnow() >= client["expires"]:
2613
if not client["last_checked_ok"]:
2614
logger.warning(
2615
"disabling client {0} - Client never "
2616
"performed a successful checker"
2617
.format(client_name))
2618
client["enabled"] = False
2619
elif client["last_checker_status"] != 0:
2620
logger.warning(
2621
"disabling client {0} - Client "
2622
"last checker failed with error code {1}"
2623
.format(client_name,
2624
client["last_checker_status"]))
2625
client["enabled"] = False
2626
else:
2627
client["expires"] = (datetime.datetime
2628
.utcnow()
2629
+ client["timeout"])
2630
logger.debug("Last checker succeeded,"
2631
" keeping {0} enabled"
2632
.format(client_name))
2633
try:
2634
client["secret"] = (
2635
pgp.decrypt(client["encrypted_secret"],
2636
client_settings[client_name]
2637
["secret"]))
2638
except PGPError:
2639
# If decryption fails, we use secret from new settings
2640
logger.debug("Failed to decrypt {0} old secret"
2641
.format(client_name))
2642
client["secret"] = (
2643
client_settings[client_name]["secret"])
2644
2645
# Add/remove clients based on new changes made to config
2646
for client_name in (set(old_client_settings)
2647
- set(client_settings)):
2648
del clients_data[client_name]
2649
for client_name in (set(client_settings)
2650
- set(old_client_settings)):
2651
clients_data[client_name] = client_settings[client_name]
2652
2653
# Create all client objects
2654
for client_name, client in clients_data.iteritems():
2655
tcp_server.clients[client_name] = client_class(
2656
name = client_name, settings = client,
2657
server_settings = server_settings)
2658
2659
if not tcp_server.clients:
2660
logger.warning("No clients defined")
2661
2662
if not foreground:
2663
if pidfile is not None:
2664
try:
2665
with pidfile:
2666
pid = os.getpid()
2667
pidfile.write(str(pid) + "\n".encode("utf-8"))
2668
except IOError:
2669
logger.error("Could not write to file %r with PID %d",
2670
pidfilename, pid)
814
2671
del pidfile
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
2672
del pidfilename
2673
2674
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2675
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2676
2677
if use_dbus:
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2680
class MandosDBusService(DBusObjectWithProperties):
2681
"""A D-Bus proxy object"""
2682
def __init__(self):
2683
dbus.service.Object.__init__(self, bus, "/")
2684
_interface = "se.recompile.Mandos"
2685
2686
@dbus_interface_annotations(_interface)
2687
def _foo(self):
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2690
"false"}
2691
2692
@dbus.service.signal(_interface, signature="o")
2693
def ClientAdded(self, objpath):
2694
"D-Bus signal"
2695
pass
2696
2697
@dbus.service.signal(_interface, signature="ss")
2698
def ClientNotFound(self, fingerprint, address):
2699
"D-Bus signal"
2700
pass
2701
2702
@dbus.service.signal(_interface, signature="os")
2703
def ClientRemoved(self, objpath, name):
2704
"D-Bus signal"
2705
pass
2706
2707
@dbus.service.method(_interface, out_signature="ao")
2708
def GetAllClients(self):
2709
"D-Bus method"
2710
return dbus.Array(c.dbus_object_path
2711
for c in
2712
tcp_server.clients.itervalues())
2713
2714
@dbus.service.method(_interface,
2715
out_signature="a{oa{sv}}")
2716
def GetAllClientsWithProperties(self):
2717
"D-Bus method"
2718
return dbus.Dictionary(
2719
((c.dbus_object_path, c.GetAll(""))
2720
for c in tcp_server.clients.itervalues()),
2721
signature="oa{sv}")
2722
2723
@dbus.service.method(_interface, in_signature="o")
2724
def RemoveClient(self, object_path):
2725
"D-Bus method"
2726
for c in tcp_server.clients.itervalues():
2727
if c.dbus_object_path == object_path:
2728
del tcp_server.clients[c.name]
2729
c.remove_from_connection()
2730
# Don't signal anything except ClientRemoved
2731
c.disable(quiet=True)
2732
# Emit D-Bus signal
2733
self.ClientRemoved(object_path, c.name)
2734
return
2735
raise KeyError(object_path)
2736
2737
del _interface
2738
2739
mandos_dbus_service = MandosDBusService()
818
2740
819
2741
def cleanup():
820
2742
"Cleanup function; run on exit"
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
827
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
2743
service.cleanup()
2744
2745
multiprocessing.active_children()
2746
wnull.close()
2747
if not (tcp_server.clients or client_settings):
2748
return
2749
2750
# Store client before exiting. Secrets are encrypted with key
2751
# based on what config file has. If config file is
2752
# removed/edited, old secret will thus be unrecovable.
2753
clients = {}
2754
with PGPEngine() as pgp:
2755
for client in tcp_server.clients.itervalues():
2756
key = client_settings[client.name]["secret"]
2757
client.encrypted_secret = pgp.encrypt(client.secret,
2758
key)
2759
client_dict = {}
2760
2761
# A list of attributes that can not be pickled
2762
# + secret.
2763
exclude = set(("bus", "changedstate", "secret",
2764
"checker", "server_settings"))
2765
for name, typ in (inspect.getmembers
2766
(dbus.service.Object)):
2767
exclude.add(name)
2768
2769
client_dict["encrypted_secret"] = (client
2770
.encrypted_secret)
2771
for attr in client.client_structure:
2772
if attr not in exclude:
2773
client_dict[attr] = getattr(client, attr)
2774
2775
clients[client.name] = client_dict
2776
del client_settings[client.name]["secret"]
2777
2778
try:
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2783
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2785
os.rename(tempname, stored_state_path)
2786
except (IOError, OSError) as e:
2787
if not debug:
2788
try:
2789
os.remove(tempname)
2790
except NameError:
2791
pass
2792
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2793
logger.warning("Could not save persistent state: {0}"
2794
.format(os.strerror(e.errno)))
2795
else:
2796
logger.warning("Could not save persistent state:",
2797
exc_info=e)
2798
raise
2799
2800
# Delete all clients, and settings from config
2801
while tcp_server.clients:
2802
name, client = tcp_server.clients.popitem()
2803
if use_dbus:
2804
client.remove_from_connection()
2805
# Don't signal anything except ClientRemoved
2806
client.disable(quiet=True)
2807
if use_dbus:
2808
# Emit D-Bus signal
2809
mandos_dbus_service.ClientRemoved(client
2810
.dbus_object_path,
2811
client.name)
2812
client_settings.clear()
832
2813
833
2814
atexit.register(cleanup)
834
2815
835
if not debug:
836
signal.signal(signal.SIGINT, signal.SIG_IGN)
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
839
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
2816
for client in tcp_server.clients.itervalues():
2817
if use_dbus:
2818
# Emit D-Bus signal
2819
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2820
# Need to initiate checking of clients
2821
if client.enabled:
2822
client.init_checker()
2823
2824
tcp_server.enable()
2825
tcp_server.server_activate()
2826
848
2827
# Find out what port we got
849
2828
service.port = tcp_server.socket.getsockname()[1]
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
2829
if use_ipv6:
2830
logger.info("Now listening on address %r, port %d,"
2831
" flowinfo %d, scope_id %d",
2832
*tcp_server.socket.getsockname())
2833
else: # IPv4
2834
logger.info("Now listening on address %r, port %d",
2835
*tcp_server.socket.getsockname())
852
2836
853
2837
#service.interface = tcp_server.socket.getsockname()[3]
854
2838
855
2839
try:
856
2840
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
858
2841
try:
859
server_state_changed(server.GetState())
860
except dbus.exceptions.DBusException, error:
861
logger.critical(u"DBusException: %s", error)
2842
service.activate()
2843
except dbus.exceptions.DBusException as error:
2844
logger.critical("D-Bus Exception", exc_info=error)
2845
cleanup()
862
2846
sys.exit(1)
863
2847
# End of Avahi example code
864
2848
865
2849
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
866
2850
lambda *args, **kwargs:
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
2851
(tcp_server.handle_request
2852
(*args[2:], **kwargs) or True))
869
2853
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
2854
logger.debug("Starting main loop")
872
2855
main_loop.run()
873
except AvahiError, error:
874
logger.critical(u"AvahiError: %s" + unicode(error))
2856
except AvahiError as error:
2857
logger.critical("Avahi Error", exc_info=error)
2858
cleanup()
875
2859
sys.exit(1)
876
2860
except KeyboardInterrupt:
877
2861
if debug:
878
print
2862
print("", file=sys.stderr)
2863
logger.debug("Server received KeyboardInterrupt")
2864
logger.debug("Server exiting")
2865
# Must run before the D-Bus bus name gets deregistered
2866
cleanup()
879
2867
880
2868
if __name__ == '__main__':
881
2869
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0