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- Committer: Björn Påhlsson
- Date: 2008-08-04 21:27:53 UTC
- mfrom: (45 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 46.
- Revision ID: belorn@braxen-20080804212753-rdghixnyfxb7w3u5
merge
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
46
35
import socket
47
import argparse
36
import select
37
from optparse import OptionParser
48
38
import datetime
49
39
import errno
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
40
import gnutls.crypto
41
import gnutls.connection
42
import gnutls.errors
43
import gnutls.library.functions
44
import gnutls.library.constants
45
import gnutls.library.types
46
import ConfigParser
54
47
import sys
55
48
import re
56
49
import os
57
50
import signal
51
from sets import Set
58
52
import subprocess
59
53
import atexit
60
54
import stat
61
55
import logging
62
56
import logging.handlers
63
import pwd
64
import contextlib
65
import struct
66
import fcntl
67
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
79
57
80
58
import dbus
81
import dbus.service
82
from gi.repository import GLib
59
import gobject
60
import avahi
83
61
from dbus.mainloop.glib import DBusGMainLoop
84
62
import ctypes
85
import ctypes.util
86
import xml.dom.minidom
87
import inspect
88
89
try:
90
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
91
except AttributeError:
92
try:
93
from IN import SO_BINDTODEVICE
94
except ImportError:
95
SO_BINDTODEVICE = None
96
97
if sys.version_info.major == 2:
98
str = unicode
99
100
version = "1.7.7"
101
stored_state_file = "clients.pickle"
102
103
logger = logging.getLogger()
104
syslogger = None
105
106
try:
107
if_nametoindex = ctypes.cdll.LoadLibrary(
108
ctypes.util.find_library("c")).if_nametoindex
109
except (OSError, AttributeError):
110
111
def if_nametoindex(interface):
112
"Get an interface index the hard way, i.e. using fcntl()"
113
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
114
with contextlib.closing(socket.socket()) as s:
115
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
116
struct.pack(b"16s16x", interface))
117
interface_index = struct.unpack("I", ifreq[16:20])[0]
118
return interface_index
119
120
121
def copy_function(func):
122
"""Make a copy of a function"""
123
if sys.version_info.major == 2:
124
return types.FunctionType(func.func_code,
125
func.func_globals,
126
func.func_name,
127
func.func_defaults,
128
func.func_closure)
129
else:
130
return types.FunctionType(func.__code__,
131
func.__globals__,
132
func.__name__,
133
func.__defaults__,
134
func.__closure__)
135
136
137
def initlogger(debug, level=logging.WARNING):
138
"""init logger and add loglevel"""
139
140
global syslogger
141
syslogger = (logging.handlers.SysLogHandler(
142
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
143
address = "/dev/log"))
144
syslogger.setFormatter(logging.Formatter
145
('Mandos [%(process)d]: %(levelname)s:'
146
' %(message)s'))
147
logger.addHandler(syslogger)
148
149
if debug:
150
console = logging.StreamHandler()
151
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
152
' [%(process)d]:'
153
' %(levelname)s:'
154
' %(message)s'))
155
logger.addHandler(console)
156
logger.setLevel(level)
157
158
159
class PGPError(Exception):
160
"""Exception if encryption/decryption fails"""
161
pass
162
163
164
class PGPEngine(object):
165
"""A simple class for OpenPGP symmetric encryption & decryption"""
166
167
def __init__(self):
168
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
169
self.gpg = "gpg"
170
try:
171
output = subprocess.check_output(["gpgconf"])
172
for line in output.splitlines():
173
name, text, path = line.split(b":")
174
if name == "gpg":
175
self.gpg = path
176
break
177
except OSError as e:
178
if e.errno != errno.ENOENT:
179
raise
180
self.gnupgargs = ['--batch',
181
'--homedir', self.tempdir,
182
'--force-mdc',
183
'--quiet']
184
# Only GPG version 1 has the --no-use-agent option.
185
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
186
self.gnupgargs.append("--no-use-agent")
187
188
def __enter__(self):
189
return self
190
191
def __exit__(self, exc_type, exc_value, traceback):
192
self._cleanup()
193
return False
194
195
def __del__(self):
196
self._cleanup()
197
198
def _cleanup(self):
199
if self.tempdir is not None:
200
# Delete contents of tempdir
201
for root, dirs, files in os.walk(self.tempdir,
202
topdown = False):
203
for filename in files:
204
os.remove(os.path.join(root, filename))
205
for dirname in dirs:
206
os.rmdir(os.path.join(root, dirname))
207
# Remove tempdir
208
os.rmdir(self.tempdir)
209
self.tempdir = None
210
211
def password_encode(self, password):
212
# Passphrase can not be empty and can not contain newlines or
213
# NUL bytes. So we prefix it and hex encode it.
214
encoded = b"mandos" + binascii.hexlify(password)
215
if len(encoded) > 2048:
216
# GnuPG can't handle long passwords, so encode differently
217
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
218
.replace(b"\n", b"\\n")
219
.replace(b"\0", b"\\x00"))
220
return encoded
221
222
def encrypt(self, data, password):
223
passphrase = self.password_encode(password)
224
with tempfile.NamedTemporaryFile(
225
dir=self.tempdir) as passfile:
226
passfile.write(passphrase)
227
passfile.flush()
228
proc = subprocess.Popen([self.gpg, '--symmetric',
229
'--passphrase-file',
230
passfile.name]
231
+ self.gnupgargs,
232
stdin = subprocess.PIPE,
233
stdout = subprocess.PIPE,
234
stderr = subprocess.PIPE)
235
ciphertext, err = proc.communicate(input = data)
236
if proc.returncode != 0:
237
raise PGPError(err)
238
return ciphertext
239
240
def decrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir = self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--decrypt',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin = subprocess.PIPE,
251
stdout = subprocess.PIPE,
252
stderr = subprocess.PIPE)
253
decrypted_plaintext, err = proc.communicate(input = data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return decrypted_plaintext
257
258
# Pretend that we have an Avahi module
259
class Avahi(object):
260
"""This isn't so much a class as it is a module-like namespace.
261
It is instantiated once, and simulates having an Avahi module."""
262
IF_UNSPEC = -1 # avahi-common/address.h
263
PROTO_UNSPEC = -1 # avahi-common/address.h
264
PROTO_INET = 0 # avahi-common/address.h
265
PROTO_INET6 = 1 # avahi-common/address.h
266
DBUS_NAME = "org.freedesktop.Avahi"
267
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
268
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
269
DBUS_PATH_SERVER = "/"
270
def string_array_to_txt_array(self, t):
271
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
272
for s in t), signature="ay")
273
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
274
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
275
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
276
SERVER_INVALID = 0 # avahi-common/defs.h
277
SERVER_REGISTERING = 1 # avahi-common/defs.h
278
SERVER_RUNNING = 2 # avahi-common/defs.h
279
SERVER_COLLISION = 3 # avahi-common/defs.h
280
SERVER_FAILURE = 4 # avahi-common/defs.h
281
avahi = Avahi()
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
81
logger.addHandler(syslogger)
82
del syslogger
83
282
84
283
85
class AvahiError(Exception):
284
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
285
87
self.value = value
286
return super(AvahiError, self).__init__(value, *args,
287
**kwargs)
288
88
def __str__(self):
89
return repr(self.value)
289
90
290
91
class AvahiServiceError(AvahiError):
291
92
pass
292
93
293
294
94
class AvahiGroupError(AvahiError):
295
95
pass
296
96
297
97
298
98
class AvahiService(object):
299
99
"""An Avahi (Zeroconf) service.
300
301
100
Attributes:
302
101
interface: integer; avahi.IF_UNSPEC or an interface index.
303
102
Used to optionally bind to the specified interface.
304
103
name: string; Example: 'Mandos'
305
104
type: string; Example: '_mandos._tcp'.
306
See <https://www.iana.org/assignments/service-names-port-numbers>
105
See <http://www.dns-sd.org/ServiceTypes.html>
307
106
port: integer; what port to announce
308
107
TXT: list of strings; TXT record for the service
309
108
domain: string; Domain to publish on, default to .local if empty.
311
110
max_renames: integer; maximum number of renames
312
111
rename_count: integer; counter so we only rename after collisions
313
112
a sensible number of times
314
group: D-Bus Entry Group
315
server: D-Bus Server
316
bus: dbus.SystemBus()
317
113
"""
318
319
def __init__(self,
320
interface = avahi.IF_UNSPEC,
321
name = None,
322
servicetype = None,
323
port = None,
324
TXT = None,
325
domain = "",
326
host = "",
327
max_renames = 32768,
328
protocol = avahi.PROTO_UNSPEC,
329
bus = None):
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
330
117
self.interface = interface
331
118
self.name = name
332
self.type = servicetype
119
self.type = type
333
120
self.port = port
334
self.TXT = TXT if TXT is not None else []
121
if TXT is None:
122
self.TXT = []
123
else:
124
self.TXT = TXT
335
125
self.domain = domain
336
126
self.host = host
337
127
self.rename_count = 0
338
self.max_renames = max_renames
339
self.protocol = protocol
340
self.group = None # our entry group
341
self.server = None
342
self.bus = bus
343
self.entry_group_state_changed_match = None
344
345
def rename(self, remove=True):
128
def rename(self):
346
129
"""Derived from the Avahi example code"""
347
130
if self.rename_count >= self.max_renames:
348
logger.critical("No suitable Zeroconf service name found"
349
" after %i retries, exiting.",
350
self.rename_count)
131
logger.critical(u"No suitable service name found after %i"
132
u" retries, exiting.", rename_count)
351
133
raise AvahiServiceError("Too many renames")
352
self.name = str(
353
self.server.GetAlternativeServiceName(self.name))
134
name = server.GetAlternativeServiceName(name)
135
logger.error(u"Changing name to %r ...", name)
136
self.remove()
137
self.add()
354
138
self.rename_count += 1
355
logger.info("Changing Zeroconf service name to %r ...",
356
self.name)
357
if remove:
358
self.remove()
359
try:
360
self.add()
361
except dbus.exceptions.DBusException as error:
362
if (error.get_dbus_name()
363
== "org.freedesktop.Avahi.CollisionError"):
364
logger.info("Local Zeroconf service name collision.")
365
return self.rename(remove=False)
366
else:
367
logger.critical("D-Bus Exception", exc_info=error)
368
self.cleanup()
369
os._exit(1)
370
371
139
def remove(self):
372
140
"""Derived from the Avahi example code"""
373
if self.entry_group_state_changed_match is not None:
374
self.entry_group_state_changed_match.remove()
375
self.entry_group_state_changed_match = None
376
if self.group is not None:
377
self.group.Reset()
378
141
if group is not None:
142
group.Reset()
379
143
def add(self):
380
144
"""Derived from the Avahi example code"""
381
self.remove()
382
if self.group is None:
383
self.group = dbus.Interface(
384
self.bus.get_object(avahi.DBUS_NAME,
385
self.server.EntryGroupNew()),
386
avahi.DBUS_INTERFACE_ENTRY_GROUP)
387
self.entry_group_state_changed_match = (
388
self.group.connect_to_signal(
389
'StateChanged', self.entry_group_state_changed))
390
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
391
self.name, self.type)
392
self.group.AddService(
393
self.interface,
394
self.protocol,
395
dbus.UInt32(0), # flags
396
self.name, self.type,
397
self.domain, self.host,
398
dbus.UInt16(self.port),
399
avahi.string_array_to_txt_array(self.TXT))
400
self.group.Commit()
401
402
def entry_group_state_changed(self, state, error):
403
"""Derived from the Avahi example code"""
404
logger.debug("Avahi entry group state change: %i", state)
405
406
if state == avahi.ENTRY_GROUP_ESTABLISHED:
407
logger.debug("Zeroconf service established.")
408
elif state == avahi.ENTRY_GROUP_COLLISION:
409
logger.info("Zeroconf service name collision.")
410
self.rename()
411
elif state == avahi.ENTRY_GROUP_FAILURE:
412
logger.critical("Avahi: Error in group state changed %s",
413
str(error))
414
raise AvahiGroupError("State changed: {!s}".format(error))
415
416
def cleanup(self):
417
"""Derived from the Avahi example code"""
418
if self.group is not None:
419
try:
420
self.group.Free()
421
except (dbus.exceptions.UnknownMethodException,
422
dbus.exceptions.DBusException):
423
pass
424
self.group = None
425
self.remove()
426
427
def server_state_changed(self, state, error=None):
428
"""Derived from the Avahi example code"""
429
logger.debug("Avahi server state change: %i", state)
430
bad_states = {
431
avahi.SERVER_INVALID: "Zeroconf server invalid",
432
avahi.SERVER_REGISTERING: None,
433
avahi.SERVER_COLLISION: "Zeroconf server name collision",
434
avahi.SERVER_FAILURE: "Zeroconf server failure",
435
}
436
if state in bad_states:
437
if bad_states[state] is not None:
438
if error is None:
439
logger.error(bad_states[state])
440
else:
441
logger.error(bad_states[state] + ": %r", error)
442
self.cleanup()
443
elif state == avahi.SERVER_RUNNING:
444
try:
445
self.add()
446
except dbus.exceptions.DBusException as error:
447
if (error.get_dbus_name()
448
== "org.freedesktop.Avahi.CollisionError"):
449
logger.info("Local Zeroconf service name"
450
" collision.")
451
return self.rename(remove=False)
452
else:
453
logger.critical("D-Bus Exception", exc_info=error)
454
self.cleanup()
455
os._exit(1)
456
else:
457
if error is None:
458
logger.debug("Unknown state: %r", state)
459
else:
460
logger.debug("Unknown state: %r: %r", state, error)
461
462
def activate(self):
463
"""Derived from the Avahi example code"""
464
if self.server is None:
465
self.server = dbus.Interface(
466
self.bus.get_object(avahi.DBUS_NAME,
467
avahi.DBUS_PATH_SERVER,
468
follow_name_owner_changes=True),
469
avahi.DBUS_INTERFACE_SERVER)
470
self.server.connect_to_signal("StateChanged",
471
self.server_state_changed)
472
self.server_state_changed(self.server.GetState())
473
474
475
class AvahiServiceToSyslog(AvahiService):
476
def rename(self, *args, **kwargs):
477
"""Add the new name to the syslog messages"""
478
ret = AvahiService.rename(self, *args, **kwargs)
479
syslogger.setFormatter(logging.Formatter(
480
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
481
.format(self.name)))
482
return ret
483
484
# Pretend that we have a GnuTLS module
485
class GnuTLS(object):
486
"""This isn't so much a class as it is a module-like namespace.
487
It is instantiated once, and simulates having a GnuTLS module."""
488
489
_library = ctypes.cdll.LoadLibrary(
490
ctypes.util.find_library("gnutls"))
491
_need_version = b"3.3.0"
492
def __init__(self):
493
# Need to use class name "GnuTLS" here, since this method is
494
# called before the assignment to the "gnutls" global variable
495
# happens.
496
if GnuTLS.check_version(self._need_version) is None:
497
raise GnuTLS.Error("Needs GnuTLS {} or later"
498
.format(self._need_version))
499
500
# Unless otherwise indicated, the constants and types below are
501
# all from the gnutls/gnutls.h C header file.
502
503
# Constants
504
E_SUCCESS = 0
505
E_INTERRUPTED = -52
506
E_AGAIN = -28
507
CRT_OPENPGP = 2
508
CLIENT = 2
509
SHUT_RDWR = 0
510
CRD_CERTIFICATE = 1
511
E_NO_CERTIFICATE_FOUND = -49
512
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
513
514
# Types
515
class session_int(ctypes.Structure):
516
_fields_ = []
517
session_t = ctypes.POINTER(session_int)
518
class certificate_credentials_st(ctypes.Structure):
519
_fields_ = []
520
certificate_credentials_t = ctypes.POINTER(
521
certificate_credentials_st)
522
certificate_type_t = ctypes.c_int
523
class datum_t(ctypes.Structure):
524
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
525
('size', ctypes.c_uint)]
526
class openpgp_crt_int(ctypes.Structure):
527
_fields_ = []
528
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
529
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
530
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
531
credentials_type_t = ctypes.c_int
532
transport_ptr_t = ctypes.c_void_p
533
close_request_t = ctypes.c_int
534
535
# Exceptions
536
class Error(Exception):
537
# We need to use the class name "GnuTLS" here, since this
538
# exception might be raised from within GnuTLS.__init__,
539
# which is called before the assignment to the "gnutls"
540
# global variable has happened.
541
def __init__(self, message = None, code = None, args=()):
542
# Default usage is by a message string, but if a return
543
# code is passed, convert it to a string with
544
# gnutls.strerror()
545
self.code = code
546
if message is None and code is not None:
547
message = GnuTLS.strerror(code)
548
return super(GnuTLS.Error, self).__init__(
549
message, *args)
550
551
class CertificateSecurityError(Error):
552
pass
553
554
# Classes
555
class Credentials(object):
556
def __init__(self):
557
self._c_object = gnutls.certificate_credentials_t()
558
gnutls.certificate_allocate_credentials(
559
ctypes.byref(self._c_object))
560
self.type = gnutls.CRD_CERTIFICATE
561
562
def __del__(self):
563
gnutls.certificate_free_credentials(self._c_object)
564
565
class ClientSession(object):
566
def __init__(self, socket, credentials = None):
567
self._c_object = gnutls.session_t()
568
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
569
gnutls.set_default_priority(self._c_object)
570
gnutls.transport_set_ptr(self._c_object, socket.fileno())
571
gnutls.handshake_set_private_extensions(self._c_object,
572
True)
573
self.socket = socket
574
if credentials is None:
575
credentials = gnutls.Credentials()
576
gnutls.credentials_set(self._c_object, credentials.type,
577
ctypes.cast(credentials._c_object,
578
ctypes.c_void_p))
579
self.credentials = credentials
580
581
def __del__(self):
582
gnutls.deinit(self._c_object)
583
584
def handshake(self):
585
return gnutls.handshake(self._c_object)
586
587
def send(self, data):
588
data = bytes(data)
589
data_len = len(data)
590
while data_len > 0:
591
data_len -= gnutls.record_send(self._c_object,
592
data[-data_len:],
593
data_len)
594
595
def bye(self):
596
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
597
598
# Error handling functions
599
def _error_code(result):
600
"""A function to raise exceptions on errors, suitable
601
for the 'restype' attribute on ctypes functions"""
602
if result >= 0:
603
return result
604
if result == gnutls.E_NO_CERTIFICATE_FOUND:
605
raise gnutls.CertificateSecurityError(code = result)
606
raise gnutls.Error(code = result)
607
608
def _retry_on_error(result, func, arguments):
609
"""A function to retry on some errors, suitable
610
for the 'errcheck' attribute on ctypes functions"""
611
while result < 0:
612
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
613
return _error_code(result)
614
result = func(*arguments)
615
return result
616
617
# Unless otherwise indicated, the function declarations below are
618
# all from the gnutls/gnutls.h C header file.
619
620
# Functions
621
priority_set_direct = _library.gnutls_priority_set_direct
622
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
623
ctypes.POINTER(ctypes.c_char_p)]
624
priority_set_direct.restype = _error_code
625
626
init = _library.gnutls_init
627
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
628
init.restype = _error_code
629
630
set_default_priority = _library.gnutls_set_default_priority
631
set_default_priority.argtypes = [session_t]
632
set_default_priority.restype = _error_code
633
634
record_send = _library.gnutls_record_send
635
record_send.argtypes = [session_t, ctypes.c_void_p,
636
ctypes.c_size_t]
637
record_send.restype = ctypes.c_ssize_t
638
record_send.errcheck = _retry_on_error
639
640
certificate_allocate_credentials = (
641
_library.gnutls_certificate_allocate_credentials)
642
certificate_allocate_credentials.argtypes = [
643
ctypes.POINTER(certificate_credentials_t)]
644
certificate_allocate_credentials.restype = _error_code
645
646
certificate_free_credentials = (
647
_library.gnutls_certificate_free_credentials)
648
certificate_free_credentials.argtypes = [certificate_credentials_t]
649
certificate_free_credentials.restype = None
650
651
handshake_set_private_extensions = (
652
_library.gnutls_handshake_set_private_extensions)
653
handshake_set_private_extensions.argtypes = [session_t,
654
ctypes.c_int]
655
handshake_set_private_extensions.restype = None
656
657
credentials_set = _library.gnutls_credentials_set
658
credentials_set.argtypes = [session_t, credentials_type_t,
659
ctypes.c_void_p]
660
credentials_set.restype = _error_code
661
662
strerror = _library.gnutls_strerror
663
strerror.argtypes = [ctypes.c_int]
664
strerror.restype = ctypes.c_char_p
665
666
certificate_type_get = _library.gnutls_certificate_type_get
667
certificate_type_get.argtypes = [session_t]
668
certificate_type_get.restype = _error_code
669
670
certificate_get_peers = _library.gnutls_certificate_get_peers
671
certificate_get_peers.argtypes = [session_t,
672
ctypes.POINTER(ctypes.c_uint)]
673
certificate_get_peers.restype = ctypes.POINTER(datum_t)
674
675
global_set_log_level = _library.gnutls_global_set_log_level
676
global_set_log_level.argtypes = [ctypes.c_int]
677
global_set_log_level.restype = None
678
679
global_set_log_function = _library.gnutls_global_set_log_function
680
global_set_log_function.argtypes = [log_func]
681
global_set_log_function.restype = None
682
683
deinit = _library.gnutls_deinit
684
deinit.argtypes = [session_t]
685
deinit.restype = None
686
687
handshake = _library.gnutls_handshake
688
handshake.argtypes = [session_t]
689
handshake.restype = _error_code
690
handshake.errcheck = _retry_on_error
691
692
transport_set_ptr = _library.gnutls_transport_set_ptr
693
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
694
transport_set_ptr.restype = None
695
696
bye = _library.gnutls_bye
697
bye.argtypes = [session_t, close_request_t]
698
bye.restype = _error_code
699
bye.errcheck = _retry_on_error
700
701
check_version = _library.gnutls_check_version
702
check_version.argtypes = [ctypes.c_char_p]
703
check_version.restype = ctypes.c_char_p
704
705
# All the function declarations below are from gnutls/openpgp.h
706
707
openpgp_crt_init = _library.gnutls_openpgp_crt_init
708
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
709
openpgp_crt_init.restype = _error_code
710
711
openpgp_crt_import = _library.gnutls_openpgp_crt_import
712
openpgp_crt_import.argtypes = [openpgp_crt_t,
713
ctypes.POINTER(datum_t),
714
openpgp_crt_fmt_t]
715
openpgp_crt_import.restype = _error_code
716
717
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
718
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
719
ctypes.POINTER(ctypes.c_uint)]
720
openpgp_crt_verify_self.restype = _error_code
721
722
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
723
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
724
openpgp_crt_deinit.restype = None
725
726
openpgp_crt_get_fingerprint = (
727
_library.gnutls_openpgp_crt_get_fingerprint)
728
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
729
ctypes.c_void_p,
730
ctypes.POINTER(
731
ctypes.c_size_t)]
732
openpgp_crt_get_fingerprint.restype = _error_code
733
734
# Remove non-public functions
735
del _error_code, _retry_on_error
736
# Create the global "gnutls" object, simulating a module
737
gnutls = GnuTLS()
738
739
def call_pipe(connection, # : multiprocessing.Connection
740
func, *args, **kwargs):
741
"""This function is meant to be called by multiprocessing.Process
742
743
This function runs func(*args, **kwargs), and writes the resulting
744
return value on the provided multiprocessing.Connection.
745
"""
746
connection.send(func(*args, **kwargs))
747
connection.close()
145
global group
146
if group is None:
147
group = dbus.Interface\
148
(bus.get_object(avahi.DBUS_NAME,
149
server.EntryGroupNew()),
150
avahi.DBUS_INTERFACE_ENTRY_GROUP)
151
group.connect_to_signal('StateChanged',
152
entry_group_state_changed)
153
logger.debug(u"Adding service '%s' of type '%s' ...",
154
service.name, service.type)
155
group.AddService(
156
self.interface, # interface
157
avahi.PROTO_INET6, # protocol
158
dbus.UInt32(0), # flags
159
self.name, self.type,
160
self.domain, self.host,
161
dbus.UInt16(self.port),
162
avahi.string_array_to_txt_array(self.TXT))
163
group.Commit()
164
165
# From the Avahi example code:
166
group = None # our entry group
167
# End of Avahi example code
168
748
169
749
170
class Client(object):
750
171
"""A representation of a client host served by this server.
751
752
172
Attributes:
753
approved: bool(); 'None' if not yet approved/disapproved
754
approval_delay: datetime.timedelta(); Time to wait for approval
755
approval_duration: datetime.timedelta(); Duration of one approval
756
checker: subprocess.Popen(); a running checker process used
757
to see if the client lives.
758
'None' if no process is running.
759
checker_callback_tag: a GLib event source tag, or None
760
checker_command: string; External command which is run to check
761
if client lives. %() expansions are done at
173
name: string; from the config file, used in log messages
174
fingerprint: string (40 or 32 hexadecimal digits); used to
175
uniquely identify the client
176
secret: bytestring; sent verbatim (over TLS) to client
177
fqdn: string (FQDN); available for use by the checker command
178
created: datetime.datetime(); object creation, not client host
179
last_checked_ok: datetime.datetime() or None if not yet checked OK
180
timeout: datetime.timedelta(); How long from last_checked_ok
181
until this client is invalid
182
interval: datetime.timedelta(); How often to start a new checker
183
stop_hook: If set, called by stop() as stop_hook(self)
184
checker: subprocess.Popen(); a running checker process used
185
to see if the client lives.
186
'None' if no process is running.
187
checker_initiator_tag: a gobject event source tag, or None
188
stop_initiator_tag: - '' -
189
checker_callback_tag: - '' -
190
checker_command: string; External command which is run to check if
191
client lives. %() expansions are done at
762
192
runtime with vars(self) as dict, so that for
763
193
instance %(name)s can be used in the command.
764
checker_initiator_tag: a GLib event source tag, or None
765
created: datetime.datetime(); (UTC) object creation
766
client_structure: Object describing what attributes a client has
767
and is used for storing the client at exit
768
current_checker_command: string; current running checker_command
769
disable_initiator_tag: a GLib event source tag, or None
770
enabled: bool()
771
fingerprint: string (40 or 32 hexadecimal digits); used to
772
uniquely identify the client
773
host: string; available for use by the checker command
774
interval: datetime.timedelta(); How often to start a new checker
775
last_approval_request: datetime.datetime(); (UTC) or None
776
last_checked_ok: datetime.datetime(); (UTC) or None
777
last_checker_status: integer between 0 and 255 reflecting exit
778
status of last checker. -1 reflects crashed
779
checker, -2 means no checker completed yet.
780
last_checker_signal: The signal which killed the last checker, if
781
last_checker_status is -1
782
last_enabled: datetime.datetime(); (UTC) or None
783
name: string; from the config file, used in log messages and
784
D-Bus identifiers
785
secret: bytestring; sent verbatim (over TLS) to client
786
timeout: datetime.timedelta(); How long from last_checked_ok
787
until this client is disabled
788
extended_timeout: extra long timeout when secret has been sent
789
runtime_expansions: Allowed attributes for runtime expansion.
790
expires: datetime.datetime(); time (UTC) when a client will be
791
disabled, or None
792
server_settings: The server_settings dict from main()
194
Private attibutes:
195
_timeout: Real variable for 'timeout'
196
_interval: Real variable for 'interval'
197
_timeout_milliseconds: Used when calling gobject.timeout_add()
198
_interval_milliseconds: - '' -
793
199
"""
794
795
runtime_expansions = ("approval_delay", "approval_duration",
796
"created", "enabled", "expires",
797
"fingerprint", "host", "interval",
798
"last_approval_request", "last_checked_ok",
799
"last_enabled", "name", "timeout")
800
client_defaults = {
801
"timeout": "PT5M",
802
"extended_timeout": "PT15M",
803
"interval": "PT2M",
804
"checker": "fping -q -- %%(host)s",
805
"host": "",
806
"approval_delay": "PT0S",
807
"approval_duration": "PT1S",
808
"approved_by_default": "True",
809
"enabled": "True",
810
}
811
812
@staticmethod
813
def config_parser(config):
814
"""Construct a new dict of client settings of this form:
815
{ client_name: {setting_name: value, ...}, ...}
816
with exceptions for any special settings as defined above.
817
NOTE: Must be a pure function. Must return the same result
818
value given the same arguments.
819
"""
820
settings = {}
821
for client_name in config.sections():
822
section = dict(config.items(client_name))
823
client = settings[client_name] = {}
824
825
client["host"] = section["host"]
826
# Reformat values from string types to Python types
827
client["approved_by_default"] = config.getboolean(
828
client_name, "approved_by_default")
829
client["enabled"] = config.getboolean(client_name,
830
"enabled")
831
832
# Uppercase and remove spaces from fingerprint for later
833
# comparison purposes with return value from the
834
# fingerprint() function
835
client["fingerprint"] = (section["fingerprint"].upper()
836
.replace(" ", ""))
837
if "secret" in section:
838
client["secret"] = codecs.decode(section["secret"]
839
.encode("utf-8"),
840
"base64")
841
elif "secfile" in section:
842
with open(os.path.expanduser(os.path.expandvars
843
(section["secfile"])),
844
"rb") as secfile:
845
client["secret"] = secfile.read()
846
else:
847
raise TypeError("No secret or secfile for section {}"
848
.format(section))
849
client["timeout"] = string_to_delta(section["timeout"])
850
client["extended_timeout"] = string_to_delta(
851
section["extended_timeout"])
852
client["interval"] = string_to_delta(section["interval"])
853
client["approval_delay"] = string_to_delta(
854
section["approval_delay"])
855
client["approval_duration"] = string_to_delta(
856
section["approval_duration"])
857
client["checker_command"] = section["checker"]
858
client["last_approval_request"] = None
859
client["last_checked_ok"] = None
860
client["last_checker_status"] = -2
861
862
return settings
863
864
def __init__(self, settings, name = None, server_settings=None):
200
def _set_timeout(self, timeout):
201
"Setter function for 'timeout' attribute"
202
self._timeout = timeout
203
self._timeout_milliseconds = ((self.timeout.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.timeout.seconds * 1000)
206
+ (self.timeout.microseconds
207
// 1000))
208
timeout = property(lambda self: self._timeout,
209
_set_timeout)
210
del _set_timeout
211
def _set_interval(self, interval):
212
"Setter function for 'interval' attribute"
213
self._interval = interval
214
self._interval_milliseconds = ((self.interval.days
215
* 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds
217
* 1000)
218
+ (self.interval.microseconds
219
// 1000))
220
interval = property(lambda self: self._interval,
221
_set_interval)
222
del _set_interval
223
def __init__(self, name = None, stop_hook=None, config={}):
224
"""Note: the 'checker' key in 'config' sets the
225
'checker_command' attribute and *not* the 'checker'
226
attribute."""
865
227
self.name = name
866
if server_settings is None:
867
server_settings = {}
868
self.server_settings = server_settings
869
# adding all client settings
870
for setting, value in settings.items():
871
setattr(self, setting, value)
872
873
if self.enabled:
874
if not hasattr(self, "last_enabled"):
875
self.last_enabled = datetime.datetime.utcnow()
876
if not hasattr(self, "expires"):
877
self.expires = (datetime.datetime.utcnow()
878
+ self.timeout)
228
logger.debug(u"Creating client %r", self.name)
229
# Uppercase and remove spaces from fingerprint for later
230
# comparison purposes with return value from the fingerprint()
231
# function
232
self.fingerprint = config["fingerprint"].upper()\
233
.replace(u" ", u"")
234
logger.debug(u" Fingerprint: %s", self.fingerprint)
235
if "secret" in config:
236
self.secret = config["secret"].decode(u"base64")
237
elif "secfile" in config:
238
sf = open(config["secfile"])
239
self.secret = sf.read()
240
sf.close()
879
241
else:
880
self.last_enabled = None
881
self.expires = None
882
883
logger.debug("Creating client %r", self.name)
884
logger.debug(" Fingerprint: %s", self.fingerprint)
885
self.created = settings.get("created",
886
datetime.datetime.utcnow())
887
888
# attributes specific for this server instance
242
raise TypeError(u"No secret or secfile for client %s"
243
% self.name)
244
self.fqdn = config.get("fqdn", "")
245
self.created = datetime.datetime.now()
246
self.last_checked_ok = None
247
self.timeout = string_to_delta(config["timeout"])
248
self.interval = string_to_delta(config["interval"])
249
self.stop_hook = stop_hook
889
250
self.checker = None
890
251
self.checker_initiator_tag = None
891
self.disable_initiator_tag = None
252
self.stop_initiator_tag = None
892
253
self.checker_callback_tag = None
893
self.current_checker_command = None
894
self.approved = None
895
self.approvals_pending = 0
896
self.changedstate = multiprocessing_manager.Condition(
897
multiprocessing_manager.Lock())
898
self.client_structure = [attr
899
for attr in self.__dict__.keys()
900
if not attr.startswith("_")]
901
self.client_structure.append("client_structure")
902
903
for name, t in inspect.getmembers(
904
type(self), lambda obj: isinstance(obj, property)):
905
if not name.startswith("_"):
906
self.client_structure.append(name)
907
908
# Send notice to process children that client state has changed
909
def send_changedstate(self):
910
with self.changedstate:
911
self.changedstate.notify_all()
912
913
def enable(self):
254
self.check_command = config["checker"]
255
def start(self):
914
256
"""Start this client's checker and timeout hooks"""
915
if getattr(self, "enabled", False):
916
# Already enabled
917
return
918
self.expires = datetime.datetime.utcnow() + self.timeout
919
self.enabled = True
920
self.last_enabled = datetime.datetime.utcnow()
921
self.init_checker()
922
self.send_changedstate()
923
924
def disable(self, quiet=True):
925
"""Disable this client."""
926
if not getattr(self, "enabled", False):
927
return False
928
if not quiet:
929
logger.info("Disabling client %s", self.name)
930
if getattr(self, "disable_initiator_tag", None) is not None:
931
GLib.source_remove(self.disable_initiator_tag)
932
self.disable_initiator_tag = None
933
self.expires = None
934
if getattr(self, "checker_initiator_tag", None) is not None:
935
GLib.source_remove(self.checker_initiator_tag)
936
self.checker_initiator_tag = None
937
self.stop_checker()
938
self.enabled = False
939
if not quiet:
940
self.send_changedstate()
941
# Do not run this again if called by a GLib.timeout_add
942
return False
943
944
def __del__(self):
945
self.disable()
946
947
def init_checker(self):
948
257
# Schedule a new checker to be started an 'interval' from now,
949
258
# and every interval from then on.
950
if self.checker_initiator_tag is not None:
951
GLib.source_remove(self.checker_initiator_tag)
952
self.checker_initiator_tag = GLib.timeout_add(
953
int(self.interval.total_seconds() * 1000),
954
self.start_checker)
955
# Schedule a disable() when 'timeout' has passed
956
if self.disable_initiator_tag is not None:
957
GLib.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = GLib.timeout_add(
959
int(self.timeout.total_seconds() * 1000), self.disable)
259
self.checker_initiator_tag = gobject.timeout_add\
260
(self._interval_milliseconds,
261
self.start_checker)
960
262
# Also start a new checker *right now*.
961
263
self.start_checker()
962
963
def checker_callback(self, source, condition, connection,
964
command):
264
# Schedule a stop() when 'timeout' has passed
265
self.stop_initiator_tag = gobject.timeout_add\
266
(self._timeout_milliseconds,
267
self.stop)
268
def stop(self):
269
"""Stop this client.
270
The possibility that a client might be restarted is left open,
271
but not currently used."""
272
# If this client doesn't have a secret, it is already stopped.
273
if self.secret:
274
logger.info(u"Stopping client %s", self.name)
275
self.secret = None
276
else:
277
return False
278
if getattr(self, "stop_initiator_tag", False):
279
gobject.source_remove(self.stop_initiator_tag)
280
self.stop_initiator_tag = None
281
if getattr(self, "checker_initiator_tag", False):
282
gobject.source_remove(self.checker_initiator_tag)
283
self.checker_initiator_tag = None
284
self.stop_checker()
285
if self.stop_hook:
286
self.stop_hook(self)
287
# Do not run this again if called by a gobject.timeout_add
288
return False
289
def __del__(self):
290
self.stop_hook = None
291
self.stop()
292
def checker_callback(self, pid, condition):
965
293
"""The checker has completed, so take appropriate actions."""
294
now = datetime.datetime.now()
966
295
self.checker_callback_tag = None
967
296
self.checker = None
968
# Read return code from connection (see call_pipe)
969
returncode = connection.recv()
970
connection.close()
971
972
if returncode >= 0:
973
self.last_checker_status = returncode
974
self.last_checker_signal = None
975
if self.last_checker_status == 0:
976
logger.info("Checker for %(name)s succeeded",
977
vars(self))
978
self.checked_ok()
979
else:
980
logger.info("Checker for %(name)s failed", vars(self))
981
else:
982
self.last_checker_status = -1
983
self.last_checker_signal = -returncode
984
logger.warning("Checker for %(name)s crashed?",
297
if os.WIFEXITED(condition) \
298
and (os.WEXITSTATUS(condition) == 0):
299
logger.info(u"Checker for %(name)s succeeded",
300
vars(self))
301
self.last_checked_ok = now
302
gobject.source_remove(self.stop_initiator_tag)
303
self.stop_initiator_tag = gobject.timeout_add\
304
(self._timeout_milliseconds,
305
self.stop)
306
elif not os.WIFEXITED(condition):
307
logger.warning(u"Checker for %(name)s crashed?",
985
308
vars(self))
986
return False
987
988
def checked_ok(self):
989
"""Assert that the client has been seen, alive and well."""
990
self.last_checked_ok = datetime.datetime.utcnow()
991
self.last_checker_status = 0
992
self.last_checker_signal = None
993
self.bump_timeout()
994
995
def bump_timeout(self, timeout=None):
996
"""Bump up the timeout for this client."""
997
if timeout is None:
998
timeout = self.timeout
999
if self.disable_initiator_tag is not None:
1000
GLib.source_remove(self.disable_initiator_tag)
1001
self.disable_initiator_tag = None
1002
if getattr(self, "enabled", False):
1003
self.disable_initiator_tag = GLib.timeout_add(
1004
int(timeout.total_seconds() * 1000), self.disable)
1005
self.expires = datetime.datetime.utcnow() + timeout
1006
1007
def need_approval(self):
1008
self.last_approval_request = datetime.datetime.utcnow()
1009
309
else:
310
logger.info(u"Checker for %(name)s failed",
311
vars(self))
1010
312
def start_checker(self):
1011
313
"""Start a new checker subprocess if one is not running.
1012
1013
314
If a checker already exists, leave it running and do
1014
315
nothing."""
1015
316
# The reason for not killing a running checker is that if we
1016
# did that, and if a checker (for some reason) started running
1017
# slowly and taking more than 'interval' time, then the client
1018
# would inevitably timeout, since no checker would get a
1019
# chance to run to completion. If we instead leave running
317
# did that, then if a checker (for some reason) started
318
# running slowly and taking more than 'interval' time, the
319
# client would inevitably timeout, since no checker would get
320
# a chance to run to completion. If we instead leave running
1020
321
# checkers alone, the checker would have to take more time
1021
# than 'timeout' for the client to be disabled, which is as it
1022
# should be.
1023
1024
if self.checker is not None and not self.checker.is_alive():
1025
logger.warning("Checker was not alive; joining")
1026
self.checker.join()
1027
self.checker = None
1028
# Start a new checker if needed
322
# than 'timeout' for the client to be declared invalid, which
323
# is as it should be.
1029
324
if self.checker is None:
1030
# Escape attributes for the shell
1031
escaped_attrs = {
1032
attr: re.escape(str(getattr(self, attr)))
1033
for attr in self.runtime_expansions }
1034
try:
1035
command = self.checker_command % escaped_attrs
1036
except TypeError as error:
1037
logger.error('Could not format string "%s"',
1038
self.checker_command,
1039
exc_info=error)
1040
return True # Try again later
1041
self.current_checker_command = command
1042
logger.info("Starting checker %r for %s", command,
1043
self.name)
1044
# We don't need to redirect stdout and stderr, since
1045
# in normal mode, that is already done by daemon(),
1046
# and in debug mode we don't want to. (Stdin is
1047
# always replaced by /dev/null.)
1048
# The exception is when not debugging but nevertheless
1049
# running in the foreground; use the previously
1050
# created wnull.
1051
popen_args = { "close_fds": True,
1052
"shell": True,
1053
"cwd": "/" }
1054
if (not self.server_settings["debug"]
1055
and self.server_settings["foreground"]):
1056
popen_args.update({"stdout": wnull,
1057
"stderr": wnull })
1058
pipe = multiprocessing.Pipe(duplex = False)
1059
self.checker = multiprocessing.Process(
1060
target = call_pipe,
1061
args = (pipe[1], subprocess.call, command),
1062
kwargs = popen_args)
1063
self.checker.start()
1064
self.checker_callback_tag = GLib.io_add_watch(
1065
pipe[0].fileno(), GLib.IO_IN,
1066
self.checker_callback, pipe[0], command)
1067
# Re-run this periodically if run by GLib.timeout_add
325
try:
326
# In case check_command has exactly one % operator
327
command = self.check_command % self.fqdn
328
except TypeError:
329
# Escape attributes for the shell
330
escaped_attrs = dict((key, re.escape(str(val)))
331
for key, val in
332
vars(self).iteritems())
333
try:
334
command = self.check_command % escaped_attrs
335
except TypeError, error:
336
logger.error(u'Could not format string "%s":'
337
u' %s', self.check_command, error)
338
return True # Try again later
339
try:
340
logger.info(u"Starting checker %r for %s",
341
command, self.name)
342
self.checker = subprocess.Popen(command,
343
close_fds=True,
344
shell=True, cwd="/")
345
self.checker_callback_tag = gobject.child_watch_add\
346
(self.checker.pid,
347
self.checker_callback)
348
except subprocess.OSError, error:
349
logger.error(u"Failed to start subprocess: %s",
350
error)
351
# Re-run this periodically if run by gobject.timeout_add
1068
352
return True
1069
1070
353
def stop_checker(self):
1071
354
"""Force the checker process, if any, to stop."""
1072
355
if self.checker_callback_tag:
1073
GLib.source_remove(self.checker_callback_tag)
356
gobject.source_remove(self.checker_callback_tag)
1074
357
self.checker_callback_tag = None
1075
358
if getattr(self, "checker", None) is None:
1076
359
return
1077
360
logger.debug("Stopping checker for %(name)s", vars(self))
1078
self.checker.terminate()
361
try:
362
os.kill(self.checker.pid, signal.SIGTERM)
363
#os.sleep(0.5)
364
#if self.checker.poll() is None:
365
# os.kill(self.checker.pid, signal.SIGKILL)
366
except OSError, error:
367
if error.errno != errno.ESRCH: # No such process
368
raise
1079
369
self.checker = None
1080
1081
1082
def dbus_service_property(dbus_interface,
1083
signature="v",
1084
access="readwrite",
1085
byte_arrays=False):
1086
"""Decorators for marking methods of a DBusObjectWithProperties to
1087
become properties on the D-Bus.
1088
1089
The decorated method will be called with no arguments by "Get"
1090
and with one argument by "Set".
1091
1092
The parameters, where they are supported, are the same as
1093
dbus.service.method, except there is only "signature", since the
1094
type from Get() and the type sent to Set() is the same.
1095
"""
1096
# Encoding deeply encoded byte arrays is not supported yet by the
1097
# "Set" method, so we fail early here:
1098
if byte_arrays and signature != "ay":
1099
raise ValueError("Byte arrays not supported for non-'ay'"
1100
" signature {!r}".format(signature))
1101
1102
def decorator(func):
1103
func._dbus_is_property = True
1104
func._dbus_interface = dbus_interface
1105
func._dbus_signature = signature
1106
func._dbus_access = access
1107
func._dbus_name = func.__name__
1108
if func._dbus_name.endswith("_dbus_property"):
1109
func._dbus_name = func._dbus_name[:-14]
1110
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1111
return func
1112
1113
return decorator
1114
1115
1116
def dbus_interface_annotations(dbus_interface):
1117
"""Decorator for marking functions returning interface annotations
1118
1119
Usage:
1120
1121
@dbus_interface_annotations("org.example.Interface")
1122
def _foo(self): # Function name does not matter
1123
return {"org.freedesktop.DBus.Deprecated": "true",
1124
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1125
"false"}
1126
"""
1127
1128
def decorator(func):
1129
func._dbus_is_interface = True
1130
func._dbus_interface = dbus_interface
1131
func._dbus_name = dbus_interface
1132
return func
1133
1134
return decorator
1135
1136
1137
def dbus_annotations(annotations):
1138
"""Decorator to annotate D-Bus methods, signals or properties
1139
Usage:
1140
1141
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1142
"org.freedesktop.DBus.Property."
1143
"EmitsChangedSignal": "false"})
1144
@dbus_service_property("org.example.Interface", signature="b",
1145
access="r")
1146
def Property_dbus_property(self):
1147
return dbus.Boolean(False)
1148
1149
See also the DBusObjectWithAnnotations class.
1150
"""
1151
1152
def decorator(func):
1153
func._dbus_annotations = annotations
1154
return func
1155
1156
return decorator
1157
1158
1159
class DBusPropertyException(dbus.exceptions.DBusException):
1160
"""A base class for D-Bus property-related exceptions
1161
"""
1162
pass
1163
1164
1165
class DBusPropertyAccessException(DBusPropertyException):
1166
"""A property's access permissions disallows an operation.
1167
"""
1168
pass
1169
1170
1171
class DBusPropertyNotFound(DBusPropertyException):
1172
"""An attempt was made to access a non-existing property.
1173
"""
1174
pass
1175
1176
1177
class DBusObjectWithAnnotations(dbus.service.Object):
1178
"""A D-Bus object with annotations.
1179
1180
Classes inheriting from this can use the dbus_annotations
1181
decorator to add annotations to methods or signals.
1182
"""
1183
1184
@staticmethod
1185
def _is_dbus_thing(thing):
1186
"""Returns a function testing if an attribute is a D-Bus thing
1187
1188
If called like _is_dbus_thing("method") it returns a function
1189
suitable for use as predicate to inspect.getmembers().
1190
"""
1191
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1192
False)
1193
1194
def _get_all_dbus_things(self, thing):
1195
"""Returns a generator of (name, attribute) pairs
1196
"""
1197
return ((getattr(athing.__get__(self), "_dbus_name", name),
1198
athing.__get__(self))
1199
for cls in self.__class__.__mro__
1200
for name, athing in
1201
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1202
1203
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1204
out_signature = "s",
1205
path_keyword = 'object_path',
1206
connection_keyword = 'connection')
1207
def Introspect(self, object_path, connection):
1208
"""Overloading of standard D-Bus method.
1209
1210
Inserts annotation tags on methods and signals.
1211
"""
1212
xmlstring = dbus.service.Object.Introspect(self, object_path,
1213
connection)
1214
try:
1215
document = xml.dom.minidom.parseString(xmlstring)
1216
1217
for if_tag in document.getElementsByTagName("interface"):
1218
# Add annotation tags
1219
for typ in ("method", "signal"):
1220
for tag in if_tag.getElementsByTagName(typ):
1221
annots = dict()
1222
for name, prop in (self.
1223
_get_all_dbus_things(typ)):
1224
if (name == tag.getAttribute("name")
1225
and prop._dbus_interface
1226
== if_tag.getAttribute("name")):
1227
annots.update(getattr(
1228
prop, "_dbus_annotations", {}))
1229
for name, value in annots.items():
1230
ann_tag = document.createElement(
1231
"annotation")
1232
ann_tag.setAttribute("name", name)
1233
ann_tag.setAttribute("value", value)
1234
tag.appendChild(ann_tag)
1235
# Add interface annotation tags
1236
for annotation, value in dict(
1237
itertools.chain.from_iterable(
1238
annotations().items()
1239
for name, annotations
1240
in self._get_all_dbus_things("interface")
1241
if name == if_tag.getAttribute("name")
1242
)).items():
1243
ann_tag = document.createElement("annotation")
1244
ann_tag.setAttribute("name", annotation)
1245
ann_tag.setAttribute("value", value)
1246
if_tag.appendChild(ann_tag)
1247
# Fix argument name for the Introspect method itself
1248
if (if_tag.getAttribute("name")
1249
== dbus.INTROSPECTABLE_IFACE):
1250
for cn in if_tag.getElementsByTagName("method"):
1251
if cn.getAttribute("name") == "Introspect":
1252
for arg in cn.getElementsByTagName("arg"):
1253
if (arg.getAttribute("direction")
1254
== "out"):
1255
arg.setAttribute("name",
1256
"xml_data")
1257
xmlstring = document.toxml("utf-8")
1258
document.unlink()
1259
except (AttributeError, xml.dom.DOMException,
1260
xml.parsers.expat.ExpatError) as error:
1261
logger.error("Failed to override Introspection method",
1262
exc_info=error)
1263
return xmlstring
1264
1265
1266
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1267
"""A D-Bus object with properties.
1268
1269
Classes inheriting from this can use the dbus_service_property
1270
decorator to expose methods as D-Bus properties. It exposes the
1271
standard Get(), Set(), and GetAll() methods on the D-Bus.
1272
"""
1273
1274
def _get_dbus_property(self, interface_name, property_name):
1275
"""Returns a bound method if one exists which is a D-Bus
1276
property with the specified name and interface.
1277
"""
1278
for cls in self.__class__.__mro__:
1279
for name, value in inspect.getmembers(
1280
cls, self._is_dbus_thing("property")):
1281
if (value._dbus_name == property_name
1282
and value._dbus_interface == interface_name):
1283
return value.__get__(self)
1284
1285
# No such property
1286
raise DBusPropertyNotFound("{}:{}.{}".format(
1287
self.dbus_object_path, interface_name, property_name))
1288
1289
@classmethod
1290
def _get_all_interface_names(cls):
1291
"""Get a sequence of all interfaces supported by an object"""
1292
return (name for name in set(getattr(getattr(x, attr),
1293
"_dbus_interface", None)
1294
for x in (inspect.getmro(cls))
1295
for attr in dir(x))
1296
if name is not None)
1297
1298
@dbus.service.method(dbus.PROPERTIES_IFACE,
1299
in_signature="ss",
1300
out_signature="v")
1301
def Get(self, interface_name, property_name):
1302
"""Standard D-Bus property Get() method, see D-Bus standard.
1303
"""
1304
prop = self._get_dbus_property(interface_name, property_name)
1305
if prop._dbus_access == "write":
1306
raise DBusPropertyAccessException(property_name)
1307
value = prop()
1308
if not hasattr(value, "variant_level"):
1309
return value
1310
return type(value)(value, variant_level=value.variant_level+1)
1311
1312
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1313
def Set(self, interface_name, property_name, value):
1314
"""Standard D-Bus property Set() method, see D-Bus standard.
1315
"""
1316
prop = self._get_dbus_property(interface_name, property_name)
1317
if prop._dbus_access == "read":
1318
raise DBusPropertyAccessException(property_name)
1319
if prop._dbus_get_args_options["byte_arrays"]:
1320
# The byte_arrays option is not supported yet on
1321
# signatures other than "ay".
1322
if prop._dbus_signature != "ay":
1323
raise ValueError("Byte arrays not supported for non-"
1324
"'ay' signature {!r}"
1325
.format(prop._dbus_signature))
1326
value = dbus.ByteArray(b''.join(chr(byte)
1327
for byte in value))
1328
prop(value)
1329
1330
@dbus.service.method(dbus.PROPERTIES_IFACE,
1331
in_signature="s",
1332
out_signature="a{sv}")
1333
def GetAll(self, interface_name):
1334
"""Standard D-Bus property GetAll() method, see D-Bus
1335
standard.
1336
1337
Note: Will not include properties with access="write".
1338
"""
1339
properties = {}
1340
for name, prop in self._get_all_dbus_things("property"):
1341
if (interface_name
1342
and interface_name != prop._dbus_interface):
1343
# Interface non-empty but did not match
1344
continue
1345
# Ignore write-only properties
1346
if prop._dbus_access == "write":
1347
continue
1348
value = prop()
1349
if not hasattr(value, "variant_level"):
1350
properties[name] = value
1351
continue
1352
properties[name] = type(value)(
1353
value, variant_level = value.variant_level + 1)
1354
return dbus.Dictionary(properties, signature="sv")
1355
1356
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1357
def PropertiesChanged(self, interface_name, changed_properties,
1358
invalidated_properties):
1359
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1360
standard.
1361
"""
1362
pass
1363
1364
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1365
out_signature="s",
1366
path_keyword='object_path',
1367
connection_keyword='connection')
1368
def Introspect(self, object_path, connection):
1369
"""Overloading of standard D-Bus method.
1370
1371
Inserts property tags and interface annotation tags.
1372
"""
1373
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1374
object_path,
1375
connection)
1376
try:
1377
document = xml.dom.minidom.parseString(xmlstring)
1378
1379
def make_tag(document, name, prop):
1380
e = document.createElement("property")
1381
e.setAttribute("name", name)
1382
e.setAttribute("type", prop._dbus_signature)
1383
e.setAttribute("access", prop._dbus_access)
1384
return e
1385
1386
for if_tag in document.getElementsByTagName("interface"):
1387
# Add property tags
1388
for tag in (make_tag(document, name, prop)
1389
for name, prop
1390
in self._get_all_dbus_things("property")
1391
if prop._dbus_interface
1392
== if_tag.getAttribute("name")):
1393
if_tag.appendChild(tag)
1394
# Add annotation tags for properties
1395
for tag in if_tag.getElementsByTagName("property"):
1396
annots = dict()
1397
for name, prop in self._get_all_dbus_things(
1398
"property"):
1399
if (name == tag.getAttribute("name")
1400
and prop._dbus_interface
1401
== if_tag.getAttribute("name")):
1402
annots.update(getattr(
1403
prop, "_dbus_annotations", {}))
1404
for name, value in annots.items():
1405
ann_tag = document.createElement(
1406
"annotation")
1407
ann_tag.setAttribute("name", name)
1408
ann_tag.setAttribute("value", value)
1409
tag.appendChild(ann_tag)
1410
# Add the names to the return values for the
1411
# "org.freedesktop.DBus.Properties" methods
1412
if (if_tag.getAttribute("name")
1413
== "org.freedesktop.DBus.Properties"):
1414
for cn in if_tag.getElementsByTagName("method"):
1415
if cn.getAttribute("name") == "Get":
1416
for arg in cn.getElementsByTagName("arg"):
1417
if (arg.getAttribute("direction")
1418
== "out"):
1419
arg.setAttribute("name", "value")
1420
elif cn.getAttribute("name") == "GetAll":
1421
for arg in cn.getElementsByTagName("arg"):
1422
if (arg.getAttribute("direction")
1423
== "out"):
1424
arg.setAttribute("name", "props")
1425
xmlstring = document.toxml("utf-8")
1426
document.unlink()
1427
except (AttributeError, xml.dom.DOMException,
1428
xml.parsers.expat.ExpatError) as error:
1429
logger.error("Failed to override Introspection method",
1430
exc_info=error)
1431
return xmlstring
1432
1433
try:
1434
dbus.OBJECT_MANAGER_IFACE
1435
except AttributeError:
1436
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1437
1438
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1439
"""A D-Bus object with an ObjectManager.
1440
1441
Classes inheriting from this exposes the standard
1442
GetManagedObjects call and the InterfacesAdded and
1443
InterfacesRemoved signals on the standard
1444
"org.freedesktop.DBus.ObjectManager" interface.
1445
1446
Note: No signals are sent automatically; they must be sent
1447
manually.
1448
"""
1449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1450
out_signature = "a{oa{sa{sv}}}")
1451
def GetManagedObjects(self):
1452
"""This function must be overridden"""
1453
raise NotImplementedError()
1454
1455
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1456
signature = "oa{sa{sv}}")
1457
def InterfacesAdded(self, object_path, interfaces_and_properties):
1458
pass
1459
1460
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1461
def InterfacesRemoved(self, object_path, interfaces):
1462
pass
1463
1464
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1465
out_signature = "s",
1466
path_keyword = 'object_path',
1467
connection_keyword = 'connection')
1468
def Introspect(self, object_path, connection):
1469
"""Overloading of standard D-Bus method.
1470
1471
Override return argument name of GetManagedObjects to be
1472
"objpath_interfaces_and_properties"
1473
"""
1474
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1475
object_path,
1476
connection)
1477
try:
1478
document = xml.dom.minidom.parseString(xmlstring)
1479
1480
for if_tag in document.getElementsByTagName("interface"):
1481
# Fix argument name for the GetManagedObjects method
1482
if (if_tag.getAttribute("name")
1483
== dbus.OBJECT_MANAGER_IFACE):
1484
for cn in if_tag.getElementsByTagName("method"):
1485
if (cn.getAttribute("name")
1486
== "GetManagedObjects"):
1487
for arg in cn.getElementsByTagName("arg"):
1488
if (arg.getAttribute("direction")
1489
== "out"):
1490
arg.setAttribute(
1491
"name",
1492
"objpath_interfaces"
1493
"_and_properties")
1494
xmlstring = document.toxml("utf-8")
1495
document.unlink()
1496
except (AttributeError, xml.dom.DOMException,
1497
xml.parsers.expat.ExpatError) as error:
1498
logger.error("Failed to override Introspection method",
1499
exc_info = error)
1500
return xmlstring
1501
1502
def datetime_to_dbus(dt, variant_level=0):
1503
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1504
if dt is None:
1505
return dbus.String("", variant_level = variant_level)
1506
return dbus.String(dt.isoformat(), variant_level=variant_level)
1507
1508
1509
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1510
"""A class decorator; applied to a subclass of
1511
dbus.service.Object, it will add alternate D-Bus attributes with
1512
interface names according to the "alt_interface_names" mapping.
1513
Usage:
1514
1515
@alternate_dbus_interfaces({"org.example.Interface":
1516
"net.example.AlternateInterface"})
1517
class SampleDBusObject(dbus.service.Object):
1518
@dbus.service.method("org.example.Interface")
1519
def SampleDBusMethod():
1520
pass
1521
1522
The above "SampleDBusMethod" on "SampleDBusObject" will be
1523
reachable via two interfaces: "org.example.Interface" and
1524
"net.example.AlternateInterface", the latter of which will have
1525
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1526
"true", unless "deprecate" is passed with a False value.
1527
1528
This works for methods and signals, and also for D-Bus properties
1529
(from DBusObjectWithProperties) and interfaces (from the
1530
dbus_interface_annotations decorator).
1531
"""
1532
1533
def wrapper(cls):
1534
for orig_interface_name, alt_interface_name in (
1535
alt_interface_names.items()):
1536
attr = {}
1537
interface_names = set()
1538
# Go though all attributes of the class
1539
for attrname, attribute in inspect.getmembers(cls):
1540
# Ignore non-D-Bus attributes, and D-Bus attributes
1541
# with the wrong interface name
1542
if (not hasattr(attribute, "_dbus_interface")
1543
or not attribute._dbus_interface.startswith(
1544
orig_interface_name)):
1545
continue
1546
# Create an alternate D-Bus interface name based on
1547
# the current name
1548
alt_interface = attribute._dbus_interface.replace(
1549
orig_interface_name, alt_interface_name)
1550
interface_names.add(alt_interface)
1551
# Is this a D-Bus signal?
1552
if getattr(attribute, "_dbus_is_signal", False):
1553
# Extract the original non-method undecorated
1554
# function by black magic
1555
if sys.version_info.major == 2:
1556
nonmethod_func = (dict(
1557
zip(attribute.func_code.co_freevars,
1558
attribute.__closure__))
1559
["func"].cell_contents)
1560
else:
1561
nonmethod_func = (dict(
1562
zip(attribute.__code__.co_freevars,
1563
attribute.__closure__))
1564
["func"].cell_contents)
1565
# Create a new, but exactly alike, function
1566
# object, and decorate it to be a new D-Bus signal
1567
# with the alternate D-Bus interface name
1568
new_function = copy_function(nonmethod_func)
1569
new_function = (dbus.service.signal(
1570
alt_interface,
1571
attribute._dbus_signature)(new_function))
1572
# Copy annotations, if any
1573
try:
1574
new_function._dbus_annotations = dict(
1575
attribute._dbus_annotations)
1576
except AttributeError:
1577
pass
1578
# Define a creator of a function to call both the
1579
# original and alternate functions, so both the
1580
# original and alternate signals gets sent when
1581
# the function is called
1582
def fixscope(func1, func2):
1583
"""This function is a scope container to pass
1584
func1 and func2 to the "call_both" function
1585
outside of its arguments"""
1586
1587
@functools.wraps(func2)
1588
def call_both(*args, **kwargs):
1589
"""This function will emit two D-Bus
1590
signals by calling func1 and func2"""
1591
func1(*args, **kwargs)
1592
func2(*args, **kwargs)
1593
# Make wrapper function look like a D-Bus signal
1594
for name, attr in inspect.getmembers(func2):
1595
if name.startswith("_dbus_"):
1596
setattr(call_both, name, attr)
1597
1598
return call_both
1599
# Create the "call_both" function and add it to
1600
# the class
1601
attr[attrname] = fixscope(attribute, new_function)
1602
# Is this a D-Bus method?
1603
elif getattr(attribute, "_dbus_is_method", False):
1604
# Create a new, but exactly alike, function
1605
# object. Decorate it to be a new D-Bus method
1606
# with the alternate D-Bus interface name. Add it
1607
# to the class.
1608
attr[attrname] = (
1609
dbus.service.method(
1610
alt_interface,
1611
attribute._dbus_in_signature,
1612
attribute._dbus_out_signature)
1613
(copy_function(attribute)))
1614
# Copy annotations, if any
1615
try:
1616
attr[attrname]._dbus_annotations = dict(
1617
attribute._dbus_annotations)
1618
except AttributeError:
1619
pass
1620
# Is this a D-Bus property?
1621
elif getattr(attribute, "_dbus_is_property", False):
1622
# Create a new, but exactly alike, function
1623
# object, and decorate it to be a new D-Bus
1624
# property with the alternate D-Bus interface
1625
# name. Add it to the class.
1626
attr[attrname] = (dbus_service_property(
1627
alt_interface, attribute._dbus_signature,
1628
attribute._dbus_access,
1629
attribute._dbus_get_args_options
1630
["byte_arrays"])
1631
(copy_function(attribute)))
1632
# Copy annotations, if any
1633
try:
1634
attr[attrname]._dbus_annotations = dict(
1635
attribute._dbus_annotations)
1636
except AttributeError:
1637
pass
1638
# Is this a D-Bus interface?
1639
elif getattr(attribute, "_dbus_is_interface", False):
1640
# Create a new, but exactly alike, function
1641
# object. Decorate it to be a new D-Bus interface
1642
# with the alternate D-Bus interface name. Add it
1643
# to the class.
1644
attr[attrname] = (
1645
dbus_interface_annotations(alt_interface)
1646
(copy_function(attribute)))
1647
if deprecate:
1648
# Deprecate all alternate interfaces
1649
iname="_AlternateDBusNames_interface_annotation{}"
1650
for interface_name in interface_names:
1651
1652
@dbus_interface_annotations(interface_name)
1653
def func(self):
1654
return { "org.freedesktop.DBus.Deprecated":
1655
"true" }
1656
# Find an unused name
1657
for aname in (iname.format(i)
1658
for i in itertools.count()):
1659
if aname not in attr:
1660
attr[aname] = func
1661
break
1662
if interface_names:
1663
# Replace the class with a new subclass of it with
1664
# methods, signals, etc. as created above.
1665
if sys.version_info.major == 2:
1666
cls = type(b"{}Alternate".format(cls.__name__),
1667
(cls, ), attr)
1668
else:
1669
cls = type("{}Alternate".format(cls.__name__),
1670
(cls, ), attr)
1671
return cls
1672
1673
return wrapper
1674
1675
1676
@alternate_dbus_interfaces({"se.recompile.Mandos":
1677
"se.bsnet.fukt.Mandos"})
1678
class ClientDBus(Client, DBusObjectWithProperties):
1679
"""A Client class using D-Bus
1680
1681
Attributes:
1682
dbus_object_path: dbus.ObjectPath
1683
bus: dbus.SystemBus()
1684
"""
1685
1686
runtime_expansions = (Client.runtime_expansions
1687
+ ("dbus_object_path", ))
1688
1689
_interface = "se.recompile.Mandos.Client"
1690
1691
# dbus.service.Object doesn't use super(), so we can't either.
1692
1693
def __init__(self, bus = None, *args, **kwargs):
1694
self.bus = bus
1695
Client.__init__(self, *args, **kwargs)
1696
# Only now, when this client is initialized, can it show up on
1697
# the D-Bus
1698
client_object_name = str(self.name).translate(
1699
{ord("."): ord("_"),
1700
ord("-"): ord("_")})
1701
self.dbus_object_path = dbus.ObjectPath(
1702
"/clients/" + client_object_name)
1703
DBusObjectWithProperties.__init__(self, self.bus,
1704
self.dbus_object_path)
1705
1706
def notifychangeproperty(transform_func, dbus_name,
1707
type_func=lambda x: x,
1708
variant_level=1,
1709
invalidate_only=False,
1710
_interface=_interface):
1711
""" Modify a variable so that it's a property which announces
1712
its changes to DBus.
1713
1714
transform_fun: Function that takes a value and a variant_level
1715
and transforms it to a D-Bus type.
1716
dbus_name: D-Bus name of the variable
1717
type_func: Function that transform the value before sending it
1718
to the D-Bus. Default: no transform
1719
variant_level: D-Bus variant level. Default: 1
1720
"""
1721
attrname = "_{}".format(dbus_name)
1722
1723
def setter(self, value):
1724
if hasattr(self, "dbus_object_path"):
1725
if (not hasattr(self, attrname) or
1726
type_func(getattr(self, attrname, None))
1727
!= type_func(value)):
1728
if invalidate_only:
1729
self.PropertiesChanged(
1730
_interface, dbus.Dictionary(),
1731
dbus.Array((dbus_name, )))
1732
else:
1733
dbus_value = transform_func(
1734
type_func(value),
1735
variant_level = variant_level)
1736
self.PropertyChanged(dbus.String(dbus_name),
1737
dbus_value)
1738
self.PropertiesChanged(
1739
_interface,
1740
dbus.Dictionary({ dbus.String(dbus_name):
1741
dbus_value }),
1742
dbus.Array())
1743
setattr(self, attrname, value)
1744
1745
return property(lambda self: getattr(self, attrname), setter)
1746
1747
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1748
approvals_pending = notifychangeproperty(dbus.Boolean,
1749
"ApprovalPending",
1750
type_func = bool)
1751
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1752
last_enabled = notifychangeproperty(datetime_to_dbus,
1753
"LastEnabled")
1754
checker = notifychangeproperty(
1755
dbus.Boolean, "CheckerRunning",
1756
type_func = lambda checker: checker is not None)
1757
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1758
"LastCheckedOK")
1759
last_checker_status = notifychangeproperty(dbus.Int16,
1760
"LastCheckerStatus")
1761
last_approval_request = notifychangeproperty(
1762
datetime_to_dbus, "LastApprovalRequest")
1763
approved_by_default = notifychangeproperty(dbus.Boolean,
1764
"ApprovedByDefault")
1765
approval_delay = notifychangeproperty(
1766
dbus.UInt64, "ApprovalDelay",
1767
type_func = lambda td: td.total_seconds() * 1000)
1768
approval_duration = notifychangeproperty(
1769
dbus.UInt64, "ApprovalDuration",
1770
type_func = lambda td: td.total_seconds() * 1000)
1771
host = notifychangeproperty(dbus.String, "Host")
1772
timeout = notifychangeproperty(
1773
dbus.UInt64, "Timeout",
1774
type_func = lambda td: td.total_seconds() * 1000)
1775
extended_timeout = notifychangeproperty(
1776
dbus.UInt64, "ExtendedTimeout",
1777
type_func = lambda td: td.total_seconds() * 1000)
1778
interval = notifychangeproperty(
1779
dbus.UInt64, "Interval",
1780
type_func = lambda td: td.total_seconds() * 1000)
1781
checker_command = notifychangeproperty(dbus.String, "Checker")
1782
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1783
invalidate_only=True)
1784
1785
del notifychangeproperty
1786
1787
def __del__(self, *args, **kwargs):
1788
try:
1789
self.remove_from_connection()
1790
except LookupError:
1791
pass
1792
if hasattr(DBusObjectWithProperties, "__del__"):
1793
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1794
Client.__del__(self, *args, **kwargs)
1795
1796
def checker_callback(self, source, condition,
1797
connection, command, *args, **kwargs):
1798
ret = Client.checker_callback(self, source, condition,
1799
connection, command, *args,
1800
**kwargs)
1801
exitstatus = self.last_checker_status
1802
if exitstatus >= 0:
1803
# Emit D-Bus signal
1804
self.CheckerCompleted(dbus.Int16(exitstatus),
1805
# This is specific to GNU libC
1806
dbus.Int64(exitstatus << 8),
1807
dbus.String(command))
1808
else:
1809
# Emit D-Bus signal
1810
self.CheckerCompleted(dbus.Int16(-1),
1811
dbus.Int64(
1812
# This is specific to GNU libC
1813
(exitstatus << 8)
1814
| self.last_checker_signal),
1815
dbus.String(command))
1816
return ret
1817
1818
def start_checker(self, *args, **kwargs):
1819
old_checker_pid = getattr(self.checker, "pid", None)
1820
r = Client.start_checker(self, *args, **kwargs)
1821
# Only if new checker process was started
1822
if (self.checker is not None
1823
and old_checker_pid != self.checker.pid):
1824
# Emit D-Bus signal
1825
self.CheckerStarted(self.current_checker_command)
1826
return r
1827
1828
def _reset_approved(self):
1829
self.approved = None
1830
return False
1831
1832
def approve(self, value=True):
1833
self.approved = value
1834
GLib.timeout_add(int(self.approval_duration.total_seconds()
1835
* 1000), self._reset_approved)
1836
self.send_changedstate()
1837
1838
## D-Bus methods, signals & properties
1839
1840
## Interfaces
1841
1842
## Signals
1843
1844
# CheckerCompleted - signal
1845
@dbus.service.signal(_interface, signature="nxs")
1846
def CheckerCompleted(self, exitcode, waitstatus, command):
1847
"D-Bus signal"
1848
pass
1849
1850
# CheckerStarted - signal
1851
@dbus.service.signal(_interface, signature="s")
1852
def CheckerStarted(self, command):
1853
"D-Bus signal"
1854
pass
1855
1856
# PropertyChanged - signal
1857
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1858
@dbus.service.signal(_interface, signature="sv")
1859
def PropertyChanged(self, property, value):
1860
"D-Bus signal"
1861
pass
1862
1863
# GotSecret - signal
1864
@dbus.service.signal(_interface)
1865
def GotSecret(self):
1866
"""D-Bus signal
1867
Is sent after a successful transfer of secret from the Mandos
1868
server to mandos-client
1869
"""
1870
pass
1871
1872
# Rejected - signal
1873
@dbus.service.signal(_interface, signature="s")
1874
def Rejected(self, reason):
1875
"D-Bus signal"
1876
pass
1877
1878
# NeedApproval - signal
1879
@dbus.service.signal(_interface, signature="tb")
1880
def NeedApproval(self, timeout, default):
1881
"D-Bus signal"
1882
return self.need_approval()
1883
1884
## Methods
1885
1886
# Approve - method
1887
@dbus.service.method(_interface, in_signature="b")
1888
def Approve(self, value):
1889
self.approve(value)
1890
1891
# CheckedOK - method
1892
@dbus.service.method(_interface)
1893
def CheckedOK(self):
1894
self.checked_ok()
1895
1896
# Enable - method
1897
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1898
@dbus.service.method(_interface)
1899
def Enable(self):
1900
"D-Bus method"
1901
self.enable()
1902
1903
# StartChecker - method
1904
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1905
@dbus.service.method(_interface)
1906
def StartChecker(self):
1907
"D-Bus method"
1908
self.start_checker()
1909
1910
# Disable - method
1911
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1912
@dbus.service.method(_interface)
1913
def Disable(self):
1914
"D-Bus method"
1915
self.disable()
1916
1917
# StopChecker - method
1918
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1919
@dbus.service.method(_interface)
1920
def StopChecker(self):
1921
self.stop_checker()
1922
1923
## Properties
1924
1925
# ApprovalPending - property
1926
@dbus_service_property(_interface, signature="b", access="read")
1927
def ApprovalPending_dbus_property(self):
1928
return dbus.Boolean(bool(self.approvals_pending))
1929
1930
# ApprovedByDefault - property
1931
@dbus_service_property(_interface,
1932
signature="b",
1933
access="readwrite")
1934
def ApprovedByDefault_dbus_property(self, value=None):
1935
if value is None: # get
1936
return dbus.Boolean(self.approved_by_default)
1937
self.approved_by_default = bool(value)
1938
1939
# ApprovalDelay - property
1940
@dbus_service_property(_interface,
1941
signature="t",
1942
access="readwrite")
1943
def ApprovalDelay_dbus_property(self, value=None):
1944
if value is None: # get
1945
return dbus.UInt64(self.approval_delay.total_seconds()
1946
* 1000)
1947
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1948
1949
# ApprovalDuration - property
1950
@dbus_service_property(_interface,
1951
signature="t",
1952
access="readwrite")
1953
def ApprovalDuration_dbus_property(self, value=None):
1954
if value is None: # get
1955
return dbus.UInt64(self.approval_duration.total_seconds()
1956
* 1000)
1957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1958
1959
# Name - property
1960
@dbus_annotations(
1961
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1962
@dbus_service_property(_interface, signature="s", access="read")
1963
def Name_dbus_property(self):
1964
return dbus.String(self.name)
1965
1966
# Fingerprint - property
1967
@dbus_annotations(
1968
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1969
@dbus_service_property(_interface, signature="s", access="read")
1970
def Fingerprint_dbus_property(self):
1971
return dbus.String(self.fingerprint)
1972
1973
# Host - property
1974
@dbus_service_property(_interface,
1975
signature="s",
1976
access="readwrite")
1977
def Host_dbus_property(self, value=None):
1978
if value is None: # get
1979
return dbus.String(self.host)
1980
self.host = str(value)
1981
1982
# Created - property
1983
@dbus_annotations(
1984
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1985
@dbus_service_property(_interface, signature="s", access="read")
1986
def Created_dbus_property(self):
1987
return datetime_to_dbus(self.created)
1988
1989
# LastEnabled - property
1990
@dbus_service_property(_interface, signature="s", access="read")
1991
def LastEnabled_dbus_property(self):
1992
return datetime_to_dbus(self.last_enabled)
1993
1994
# Enabled - property
1995
@dbus_service_property(_interface,
1996
signature="b",
1997
access="readwrite")
1998
def Enabled_dbus_property(self, value=None):
1999
if value is None: # get
2000
return dbus.Boolean(self.enabled)
2001
if value:
2002
self.enable()
2003
else:
2004
self.disable()
2005
2006
# LastCheckedOK - property
2007
@dbus_service_property(_interface,
2008
signature="s",
2009
access="readwrite")
2010
def LastCheckedOK_dbus_property(self, value=None):
2011
if value is not None:
2012
self.checked_ok()
2013
return
2014
return datetime_to_dbus(self.last_checked_ok)
2015
2016
# LastCheckerStatus - property
2017
@dbus_service_property(_interface, signature="n", access="read")
2018
def LastCheckerStatus_dbus_property(self):
2019
return dbus.Int16(self.last_checker_status)
2020
2021
# Expires - property
2022
@dbus_service_property(_interface, signature="s", access="read")
2023
def Expires_dbus_property(self):
2024
return datetime_to_dbus(self.expires)
2025
2026
# LastApprovalRequest - property
2027
@dbus_service_property(_interface, signature="s", access="read")
2028
def LastApprovalRequest_dbus_property(self):
2029
return datetime_to_dbus(self.last_approval_request)
2030
2031
# Timeout - property
2032
@dbus_service_property(_interface,
2033
signature="t",
2034
access="readwrite")
2035
def Timeout_dbus_property(self, value=None):
2036
if value is None: # get
2037
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2038
old_timeout = self.timeout
2039
self.timeout = datetime.timedelta(0, 0, 0, value)
2040
# Reschedule disabling
2041
if self.enabled:
2042
now = datetime.datetime.utcnow()
2043
self.expires += self.timeout - old_timeout
2044
if self.expires <= now:
2045
# The timeout has passed
2046
self.disable()
2047
else:
2048
if (getattr(self, "disable_initiator_tag", None)
2049
is None):
2050
return
2051
GLib.source_remove(self.disable_initiator_tag)
2052
self.disable_initiator_tag = GLib.timeout_add(
2053
int((self.expires - now).total_seconds() * 1000),
2054
self.disable)
2055
2056
# ExtendedTimeout - property
2057
@dbus_service_property(_interface,
2058
signature="t",
2059
access="readwrite")
2060
def ExtendedTimeout_dbus_property(self, value=None):
2061
if value is None: # get
2062
return dbus.UInt64(self.extended_timeout.total_seconds()
2063
* 1000)
2064
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2065
2066
# Interval - property
2067
@dbus_service_property(_interface,
2068
signature="t",
2069
access="readwrite")
2070
def Interval_dbus_property(self, value=None):
2071
if value is None: # get
2072
return dbus.UInt64(self.interval.total_seconds() * 1000)
2073
self.interval = datetime.timedelta(0, 0, 0, value)
2074
if getattr(self, "checker_initiator_tag", None) is None:
2075
return
2076
if self.enabled:
2077
# Reschedule checker run
2078
GLib.source_remove(self.checker_initiator_tag)
2079
self.checker_initiator_tag = GLib.timeout_add(
2080
value, self.start_checker)
2081
self.start_checker() # Start one now, too
2082
2083
# Checker - property
2084
@dbus_service_property(_interface,
2085
signature="s",
2086
access="readwrite")
2087
def Checker_dbus_property(self, value=None):
2088
if value is None: # get
2089
return dbus.String(self.checker_command)
2090
self.checker_command = str(value)
2091
2092
# CheckerRunning - property
2093
@dbus_service_property(_interface,
2094
signature="b",
2095
access="readwrite")
2096
def CheckerRunning_dbus_property(self, value=None):
2097
if value is None: # get
2098
return dbus.Boolean(self.checker is not None)
2099
if value:
2100
self.start_checker()
2101
else:
2102
self.stop_checker()
2103
2104
# ObjectPath - property
2105
@dbus_annotations(
2106
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2107
"org.freedesktop.DBus.Deprecated": "true"})
2108
@dbus_service_property(_interface, signature="o", access="read")
2109
def ObjectPath_dbus_property(self):
2110
return self.dbus_object_path # is already a dbus.ObjectPath
2111
2112
# Secret = property
2113
@dbus_annotations(
2114
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2115
"invalidates"})
2116
@dbus_service_property(_interface,
2117
signature="ay",
2118
access="write",
2119
byte_arrays=True)
2120
def Secret_dbus_property(self, value):
2121
self.secret = bytes(value)
2122
2123
del _interface
2124
2125
2126
class ProxyClient(object):
2127
def __init__(self, child_pipe, fpr, address):
2128
self._pipe = child_pipe
2129
self._pipe.send(('init', fpr, address))
2130
if not self._pipe.recv():
2131
raise KeyError(fpr)
2132
2133
def __getattribute__(self, name):
2134
if name == '_pipe':
2135
return super(ProxyClient, self).__getattribute__(name)
2136
self._pipe.send(('getattr', name))
2137
data = self._pipe.recv()
2138
if data[0] == 'data':
2139
return data[1]
2140
if data[0] == 'function':
2141
2142
def func(*args, **kwargs):
2143
self._pipe.send(('funcall', name, args, kwargs))
2144
return self._pipe.recv()[1]
2145
2146
return func
2147
2148
def __setattr__(self, name, value):
2149
if name == '_pipe':
2150
return super(ProxyClient, self).__setattr__(name, value)
2151
self._pipe.send(('setattr', name, value))
2152
2153
2154
class ClientHandler(socketserver.BaseRequestHandler, object):
2155
"""A class to handle client connections.
2156
2157
Instantiated once for each connection to handle it.
370
def still_valid(self):
371
"""Has the timeout not yet passed for this client?"""
372
now = datetime.datetime.now()
373
if self.last_checked_ok is None:
374
return now < (self.created + self.timeout)
375
else:
376
return now < (self.last_checked_ok + self.timeout)
377
378
379
def peer_certificate(session):
380
"Return the peer's OpenPGP certificate as a bytestring"
381
# If not an OpenPGP certificate...
382
if gnutls.library.functions.gnutls_certificate_type_get\
383
(session._c_object) \
384
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
385
# ...do the normal thing
386
return session.peer_certificate
387
list_size = ctypes.c_uint()
388
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
389
(session._c_object, ctypes.byref(list_size))
390
if list_size.value == 0:
391
return None
392
cert = cert_list[0]
393
return ctypes.string_at(cert.data, cert.size)
394
395
396
def fingerprint(openpgp):
397
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
398
# New GnuTLS "datum" with the OpenPGP public key
399
datum = gnutls.library.types.gnutls_datum_t\
400
(ctypes.cast(ctypes.c_char_p(openpgp),
401
ctypes.POINTER(ctypes.c_ubyte)),
402
ctypes.c_uint(len(openpgp)))
403
# New empty GnuTLS certificate
404
crt = gnutls.library.types.gnutls_openpgp_crt_t()
405
gnutls.library.functions.gnutls_openpgp_crt_init\
406
(ctypes.byref(crt))
407
# Import the OpenPGP public key into the certificate
408
gnutls.library.functions.gnutls_openpgp_crt_import\
409
(crt, ctypes.byref(datum),
410
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
411
# New buffer for the fingerprint
412
buffer = ctypes.create_string_buffer(20)
413
buffer_length = ctypes.c_size_t()
414
# Get the fingerprint from the certificate into the buffer
415
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
416
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
417
# Deinit the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
# Convert the buffer to a Python bytestring
420
fpr = ctypes.string_at(buffer, buffer_length.value)
421
# Convert the bytestring to hexadecimal notation
422
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
423
return hex_fpr
424
425
426
class tcp_handler(SocketServer.BaseRequestHandler, object):
427
"""A TCP request handler class.
428
Instantiated by IPv6_TCPServer for each request to handle it.
2158
429
Note: This will run in its own forked process."""
2159
430
2160
431
def handle(self):
2161
with contextlib.closing(self.server.child_pipe) as child_pipe:
2162
logger.info("TCP connection from: %s",
2163
str(self.client_address))
2164
logger.debug("Pipe FD: %d",
2165
self.server.child_pipe.fileno())
2166
2167
session = gnutls.ClientSession(self.request)
2168
2169
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2170
# "+AES-256-CBC", "+SHA1",
2171
# "+COMP-NULL", "+CTYPE-OPENPGP",
2172
# "+DHE-DSS"))
2173
# Use a fallback default, since this MUST be set.
2174
priority = self.server.gnutls_priority
2175
if priority is None:
2176
priority = "NORMAL"
2177
gnutls.priority_set_direct(session._c_object,
2178
priority.encode("utf-8"),
2179
None)
2180
2181
# Start communication using the Mandos protocol
2182
# Get protocol number
2183
line = self.request.makefile().readline()
2184
logger.debug("Protocol version: %r", line)
2185
try:
2186
if int(line.strip().split()[0]) > 1:
2187
raise RuntimeError(line)
2188
except (ValueError, IndexError, RuntimeError) as error:
2189
logger.error("Unknown protocol version: %s", error)
2190
return
2191
2192
# Start GnuTLS connection
2193
try:
2194
session.handshake()
2195
except gnutls.Error as error:
2196
logger.warning("Handshake failed: %s", error)
2197
# Do not run session.bye() here: the session is not
2198
# established. Just abandon the request.
2199
return
2200
logger.debug("Handshake succeeded")
2201
2202
approval_required = False
2203
try:
2204
try:
2205
fpr = self.fingerprint(
2206
self.peer_certificate(session))
2207
except (TypeError, gnutls.Error) as error:
2208
logger.warning("Bad certificate: %s", error)
2209
return
2210
logger.debug("Fingerprint: %s", fpr)
2211
2212
try:
2213
client = ProxyClient(child_pipe, fpr,
2214
self.client_address)
2215
except KeyError:
2216
return
2217
2218
if client.approval_delay:
2219
delay = client.approval_delay
2220
client.approvals_pending += 1
2221
approval_required = True
2222
2223
while True:
2224
if not client.enabled:
2225
logger.info("Client %s is disabled",
2226
client.name)
2227
if self.server.use_dbus:
2228
# Emit D-Bus signal
2229
client.Rejected("Disabled")
2230
return
2231
2232
if client.approved or not client.approval_delay:
2233
#We are approved or approval is disabled
2234
break
2235
elif client.approved is None:
2236
logger.info("Client %s needs approval",
2237
client.name)
2238
if self.server.use_dbus:
2239
# Emit D-Bus signal
2240
client.NeedApproval(
2241
client.approval_delay.total_seconds()
2242
* 1000, client.approved_by_default)
2243
else:
2244
logger.warning("Client %s was not approved",
2245
client.name)
2246
if self.server.use_dbus:
2247
# Emit D-Bus signal
2248
client.Rejected("Denied")
2249
return
2250
2251
#wait until timeout or approved
2252
time = datetime.datetime.now()
2253
client.changedstate.acquire()
2254
client.changedstate.wait(delay.total_seconds())
2255
client.changedstate.release()
2256
time2 = datetime.datetime.now()
2257
if (time2 - time) >= delay:
2258
if not client.approved_by_default:
2259
logger.warning("Client %s timed out while"
2260
" waiting for approval",
2261
client.name)
2262
if self.server.use_dbus:
2263
# Emit D-Bus signal
2264
client.Rejected("Approval timed out")
2265
return
2266
else:
2267
break
2268
else:
2269
delay -= time2 - time
2270
2271
try:
2272
session.send(client.secret)
2273
except gnutls.Error as error:
2274
logger.warning("gnutls send failed",
2275
exc_info = error)
2276
return
2277
2278
logger.info("Sending secret to %s", client.name)
2279
# bump the timeout using extended_timeout
2280
client.bump_timeout(client.extended_timeout)
2281
if self.server.use_dbus:
2282
# Emit D-Bus signal
2283
client.GotSecret()
2284
2285
finally:
2286
if approval_required:
2287
client.approvals_pending -= 1
2288
try:
2289
session.bye()
2290
except gnutls.Error as error:
2291
logger.warning("GnuTLS bye failed",
2292
exc_info=error)
2293
2294
@staticmethod
2295
def peer_certificate(session):
2296
"Return the peer's OpenPGP certificate as a bytestring"
2297
# If not an OpenPGP certificate...
2298
if (gnutls.certificate_type_get(session._c_object)
2299
!= gnutls.CRT_OPENPGP):
2300
# ...return invalid data
2301
return b""
2302
list_size = ctypes.c_uint(1)
2303
cert_list = (gnutls.certificate_get_peers
2304
(session._c_object, ctypes.byref(list_size)))
2305
if not bool(cert_list) and list_size.value != 0:
2306
raise gnutls.Error("error getting peer certificate")
2307
if list_size.value == 0:
2308
return None
2309
cert = cert_list[0]
2310
return ctypes.string_at(cert.data, cert.size)
2311
2312
@staticmethod
2313
def fingerprint(openpgp):
2314
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2315
# New GnuTLS "datum" with the OpenPGP public key
2316
datum = gnutls.datum_t(
2317
ctypes.cast(ctypes.c_char_p(openpgp),
2318
ctypes.POINTER(ctypes.c_ubyte)),
2319
ctypes.c_uint(len(openpgp)))
2320
# New empty GnuTLS certificate
2321
crt = gnutls.openpgp_crt_t()
2322
gnutls.openpgp_crt_init(ctypes.byref(crt))
2323
# Import the OpenPGP public key into the certificate
2324
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2325
gnutls.OPENPGP_FMT_RAW)
2326
# Verify the self signature in the key
2327
crtverify = ctypes.c_uint()
2328
gnutls.openpgp_crt_verify_self(crt, 0,
2329
ctypes.byref(crtverify))
2330
if crtverify.value != 0:
2331
gnutls.openpgp_crt_deinit(crt)
2332
raise gnutls.CertificateSecurityError("Verify failed")
2333
# New buffer for the fingerprint
2334
buf = ctypes.create_string_buffer(20)
2335
buf_len = ctypes.c_size_t()
2336
# Get the fingerprint from the certificate into the buffer
2337
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2338
ctypes.byref(buf_len))
2339
# Deinit the certificate
2340
gnutls.openpgp_crt_deinit(crt)
2341
# Convert the buffer to a Python bytestring
2342
fpr = ctypes.string_at(buf, buf_len.value)
2343
# Convert the bytestring to hexadecimal notation
2344
hex_fpr = binascii.hexlify(fpr).upper()
2345
return hex_fpr
2346
2347
2348
class MultiprocessingMixIn(object):
2349
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2350
2351
def sub_process_main(self, request, address):
2352
try:
2353
self.finish_request(request, address)
2354
except Exception:
2355
self.handle_error(request, address)
2356
self.close_request(request)
2357
2358
def process_request(self, request, address):
2359
"""Start a new process to process the request."""
2360
proc = multiprocessing.Process(target = self.sub_process_main,
2361
args = (request, address))
2362
proc.start()
2363
return proc
2364
2365
2366
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2367
""" adds a pipe to the MixIn """
2368
2369
def process_request(self, request, client_address):
2370
"""Overrides and wraps the original process_request().
2371
2372
This function creates a new pipe in self.pipe
2373
"""
2374
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2375
2376
proc = MultiprocessingMixIn.process_request(self, request,
2377
client_address)
2378
self.child_pipe.close()
2379
self.add_pipe(parent_pipe, proc)
2380
2381
def add_pipe(self, parent_pipe, proc):
2382
"""Dummy function; override as necessary"""
2383
raise NotImplementedError()
2384
2385
2386
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2387
socketserver.TCPServer, object):
2388
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2389
432
logger.info(u"TCP connection from: %s",
433
unicode(self.client_address))
434
session = gnutls.connection.ClientSession\
435
(self.request, gnutls.connection.X509Credentials())
436
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
439
try:
440
if int(line.strip().split()[0]) > 1:
441
raise RuntimeError
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
444
return
445
446
# Note: gnutls.connection.X509Credentials is really a generic
447
# GnuTLS certificate credentials object so long as no X.509
448
# keys are added to it. Therefore, we can use it here despite
449
# using OpenPGP certificates.
450
451
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
452
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
453
# "+DHE-DSS"))
454
priority = "NORMAL" # Fallback default, since this
455
# MUST be set.
456
if self.server.settings["priority"]:
457
priority = self.server.settings["priority"]
458
gnutls.library.functions.gnutls_priority_set_direct\
459
(session._c_object, priority, None);
460
461
try:
462
session.handshake()
463
except gnutls.errors.GNUTLSError, error:
464
logger.warning(u"Handshake failed: %s", error)
465
# Do not run session.bye() here: the session is not
466
# established. Just abandon the request.
467
return
468
try:
469
fpr = fingerprint(peer_certificate(session))
470
except (TypeError, gnutls.errors.GNUTLSError), error:
471
logger.warning(u"Bad certificate: %s", error)
472
session.bye()
473
return
474
logger.debug(u"Fingerprint: %s", fpr)
475
client = None
476
for c in self.server.clients:
477
if c.fingerprint == fpr:
478
client = c
479
break
480
if not client:
481
logger.warning(u"Client not found for fingerprint: %s",
482
fpr)
483
session.bye()
484
return
485
# Have to check if client.still_valid(), since it is possible
486
# that the client timed out while establishing the GnuTLS
487
# session.
488
if not client.still_valid():
489
logger.warning(u"Client %(name)s is invalid",
490
vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2390
505
Attributes:
2391
enabled: Boolean; whether this server is activated yet
2392
interface: None or a network interface name (string)
2393
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
2394
508
"""
2395
2396
def __init__(self, server_address, RequestHandlerClass,
2397
interface=None,
2398
use_ipv6=True,
2399
socketfd=None):
2400
"""If socketfd is set, use that file descriptor instead of
2401
creating a new one with socket.socket().
2402
"""
2403
self.interface = interface
2404
if use_ipv6:
2405
self.address_family = socket.AF_INET6
2406
if socketfd is not None:
2407
# Save the file descriptor
2408
self.socketfd = socketfd
2409
# Save the original socket.socket() function
2410
self.socket_socket = socket.socket
2411
# To implement --socket, we monkey patch socket.socket.
2412
#
2413
# (When socketserver.TCPServer is a new-style class, we
2414
# could make self.socket into a property instead of monkey
2415
# patching socket.socket.)
2416
#
2417
# Create a one-time-only replacement for socket.socket()
2418
@functools.wraps(socket.socket)
2419
def socket_wrapper(*args, **kwargs):
2420
# Restore original function so subsequent calls are
2421
# not affected.
2422
socket.socket = self.socket_socket
2423
del self.socket_socket
2424
# This time only, return a new socket object from the
2425
# saved file descriptor.
2426
return socket.fromfd(self.socketfd, *args, **kwargs)
2427
# Replace socket.socket() function with wrapper
2428
socket.socket = socket_wrapper
2429
# The socketserver.TCPServer.__init__ will call
2430
# socket.socket(), which might be our replacement,
2431
# socket_wrapper(), if socketfd was set.
2432
socketserver.TCPServer.__init__(self, server_address,
2433
RequestHandlerClass)
2434
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
2435
518
def server_bind(self):
2436
519
"""This overrides the normal server_bind() function
2437
520
to bind to an interface if one was specified, and also NOT to
2438
521
bind to an address or port if they were not specified."""
2439
if self.interface is not None:
2440
if SO_BINDTODEVICE is None:
2441
logger.error("SO_BINDTODEVICE does not exist;"
2442
" cannot bind to interface %s",
2443
self.interface)
2444
else:
2445
try:
2446
self.socket.setsockopt(
2447
socket.SOL_SOCKET, SO_BINDTODEVICE,
2448
(self.interface + "\0").encode("utf-8"))
2449
except socket.error as error:
2450
if error.errno == errno.EPERM:
2451
logger.error("No permission to bind to"
2452
" interface %s", self.interface)
2453
elif error.errno == errno.ENOPROTOOPT:
2454
logger.error("SO_BINDTODEVICE not available;"
2455
" cannot bind to interface %s",
2456
self.interface)
2457
elif error.errno == errno.ENODEV:
2458
logger.error("Interface %s does not exist,"
2459
" cannot bind", self.interface)
2460
else:
2461
raise
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.error(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
2462
536
# Only bind(2) the socket if we really need to.
2463
537
if self.server_address[0] or self.server_address[1]:
2464
538
if not self.server_address[0]:
2465
if self.address_family == socket.AF_INET6:
2466
any_address = "::" # in6addr_any
2467
else:
2468
any_address = "0.0.0.0" # INADDR_ANY
2469
self.server_address = (any_address,
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
2470
541
self.server_address[1])
2471
elif not self.server_address[1]:
2472
self.server_address = (self.server_address[0], 0)
2473
# if self.interface:
2474
# self.server_address = (self.server_address[0],
2475
# 0, # port
2476
# 0, # flowinfo
2477
# if_nametoindex
2478
# (self.interface))
2479
return socketserver.TCPServer.server_bind(self)
2480
2481
2482
class MandosServer(IPv6_TCPServer):
2483
"""Mandos server.
2484
2485
Attributes:
2486
clients: set of Client objects
2487
gnutls_priority GnuTLS priority string
2488
use_dbus: Boolean; to emit D-Bus signals or not
2489
2490
Assumes a GLib.MainLoop event loop.
2491
"""
2492
2493
def __init__(self, server_address, RequestHandlerClass,
2494
interface=None,
2495
use_ipv6=True,
2496
clients=None,
2497
gnutls_priority=None,
2498
use_dbus=True,
2499
socketfd=None):
2500
self.enabled = False
2501
self.clients = clients
2502
if self.clients is None:
2503
self.clients = {}
2504
self.use_dbus = use_dbus
2505
self.gnutls_priority = gnutls_priority
2506
IPv6_TCPServer.__init__(self, server_address,
2507
RequestHandlerClass,
2508
interface = interface,
2509
use_ipv6 = use_ipv6,
2510
socketfd = socketfd)
2511
2512
def server_activate(self):
2513
if self.enabled:
2514
return socketserver.TCPServer.server_activate(self)
2515
2516
def enable(self):
2517
self.enabled = True
2518
2519
def add_pipe(self, parent_pipe, proc):
2520
# Call "handle_ipc" for both data and EOF events
2521
GLib.io_add_watch(
2522
parent_pipe.fileno(),
2523
GLib.IO_IN | GLib.IO_HUP,
2524
functools.partial(self.handle_ipc,
2525
parent_pipe = parent_pipe,
2526
proc = proc))
2527
2528
def handle_ipc(self, source, condition,
2529
parent_pipe=None,
2530
proc = None,
2531
client_object=None):
2532
# error, or the other end of multiprocessing.Pipe has closed
2533
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2534
# Wait for other process to exit
2535
proc.join()
2536
return False
2537
2538
# Read a request from the child
2539
request = parent_pipe.recv()
2540
command = request[0]
2541
2542
if command == 'init':
2543
fpr = request[1]
2544
address = request[2]
2545
2546
for c in self.clients.values():
2547
if c.fingerprint == fpr:
2548
client = c
2549
break
2550
else:
2551
logger.info("Client not found for fingerprint: %s, ad"
2552
"dress: %s", fpr, address)
2553
if self.use_dbus:
2554
# Emit D-Bus signal
2555
mandos_dbus_service.ClientNotFound(fpr,
2556
address[0])
2557
parent_pipe.send(False)
2558
return False
2559
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe = parent_pipe,
2565
proc = proc,
2566
client_object = client))
2567
parent_pipe.send(True)
2568
# remove the old hook in favor of the new above hook on
2569
# same fileno
2570
return False
2571
if command == 'funcall':
2572
funcname = request[1]
2573
args = request[2]
2574
kwargs = request[3]
2575
2576
parent_pipe.send(('data', getattr(client_object,
2577
funcname)(*args,
2578
**kwargs)))
2579
2580
if command == 'getattr':
2581
attrname = request[1]
2582
if isinstance(client_object.__getattribute__(attrname),
2583
collections.Callable):
2584
parent_pipe.send(('function', ))
2585
else:
2586
parent_pipe.send((
2587
'data', client_object.__getattribute__(attrname)))
2588
2589
if command == 'setattr':
2590
attrname = request[1]
2591
value = request[2]
2592
setattr(client_object, attrname, value)
2593
2594
return True
2595
2596
2597
def rfc3339_duration_to_delta(duration):
2598
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2599
2600
>>> rfc3339_duration_to_delta("P7D")
2601
datetime.timedelta(7)
2602
>>> rfc3339_duration_to_delta("PT60S")
2603
datetime.timedelta(0, 60)
2604
>>> rfc3339_duration_to_delta("PT60M")
2605
datetime.timedelta(0, 3600)
2606
>>> rfc3339_duration_to_delta("PT24H")
2607
datetime.timedelta(1)
2608
>>> rfc3339_duration_to_delta("P1W")
2609
datetime.timedelta(7)
2610
>>> rfc3339_duration_to_delta("PT5M30S")
2611
datetime.timedelta(0, 330)
2612
>>> rfc3339_duration_to_delta("P1DT3M20S")
2613
datetime.timedelta(1, 200)
2614
"""
2615
2616
# Parsing an RFC 3339 duration with regular expressions is not
2617
# possible - there would have to be multiple places for the same
2618
# values, like seconds. The current code, while more esoteric, is
2619
# cleaner without depending on a parsing library. If Python had a
2620
# built-in library for parsing we would use it, but we'd like to
2621
# avoid excessive use of external libraries.
2622
2623
# New type for defining tokens, syntax, and semantics all-in-one
2624
Token = collections.namedtuple("Token", (
2625
"regexp", # To match token; if "value" is not None, must have
2626
# a "group" containing digits
2627
"value", # datetime.timedelta or None
2628
"followers")) # Tokens valid after this token
2629
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2630
# the "duration" ABNF definition in RFC 3339, Appendix A.
2631
token_end = Token(re.compile(r"$"), None, frozenset())
2632
token_second = Token(re.compile(r"(\d+)S"),
2633
datetime.timedelta(seconds=1),
2634
frozenset((token_end, )))
2635
token_minute = Token(re.compile(r"(\d+)M"),
2636
datetime.timedelta(minutes=1),
2637
frozenset((token_second, token_end)))
2638
token_hour = Token(re.compile(r"(\d+)H"),
2639
datetime.timedelta(hours=1),
2640
frozenset((token_minute, token_end)))
2641
token_time = Token(re.compile(r"T"),
2642
None,
2643
frozenset((token_hour, token_minute,
2644
token_second)))
2645
token_day = Token(re.compile(r"(\d+)D"),
2646
datetime.timedelta(days=1),
2647
frozenset((token_time, token_end)))
2648
token_month = Token(re.compile(r"(\d+)M"),
2649
datetime.timedelta(weeks=4),
2650
frozenset((token_day, token_end)))
2651
token_year = Token(re.compile(r"(\d+)Y"),
2652
datetime.timedelta(weeks=52),
2653
frozenset((token_month, token_end)))
2654
token_week = Token(re.compile(r"(\d+)W"),
2655
datetime.timedelta(weeks=1),
2656
frozenset((token_end, )))
2657
token_duration = Token(re.compile(r"P"), None,
2658
frozenset((token_year, token_month,
2659
token_day, token_time,
2660
token_week)))
2661
# Define starting values
2662
value = datetime.timedelta() # Value so far
2663
found_token = None
2664
followers = frozenset((token_duration, )) # Following valid tokens
2665
s = duration # String left to parse
2666
# Loop until end token is found
2667
while found_token is not token_end:
2668
# Search for any currently valid tokens
2669
for token in followers:
2670
match = token.regexp.match(s)
2671
if match is not None:
2672
# Token found
2673
if token.value is not None:
2674
# Value found, parse digits
2675
factor = int(match.group(1), 10)
2676
# Add to value so far
2677
value += factor * token.value
2678
# Strip token from string
2679
s = token.regexp.sub("", s, 1)
2680
# Go to found token
2681
found_token = token
2682
# Set valid next tokens
2683
followers = found_token.followers
2684
break
2685
else:
2686
# No currently valid tokens were found
2687
raise ValueError("Invalid RFC 3339 duration: {!r}"
2688
.format(duration))
2689
# End token found
2690
return value
542
elif self.server_address[1] is None:
543
self.server_address = (self.server_address[0],
544
0)
545
return super(type(self), self).server_bind()
2691
546
2692
547
2693
548
def string_to_delta(interval):
2694
549
"""Parse a string and return a datetime.timedelta
2695
550
2696
551
>>> string_to_delta('7d')
2697
552
datetime.timedelta(7)
2698
553
>>> string_to_delta('60s')
2701
556
datetime.timedelta(0, 3600)
2702
557
>>> string_to_delta('24h')
2703
558
datetime.timedelta(1)
2704
>>> string_to_delta('1w')
559
>>> string_to_delta(u'1w')
2705
560
datetime.timedelta(7)
2706
>>> string_to_delta('5m 30s')
2707
datetime.timedelta(0, 330)
2708
561
"""
2709
2710
try:
2711
return rfc3339_duration_to_delta(interval)
2712
except ValueError:
2713
pass
2714
2715
timevalue = datetime.timedelta(0)
2716
for s in interval.split():
2717
try:
2718
suffix = s[-1]
2719
value = int(s[:-1])
2720
if suffix == "d":
2721
delta = datetime.timedelta(value)
2722
elif suffix == "s":
2723
delta = datetime.timedelta(0, value)
2724
elif suffix == "m":
2725
delta = datetime.timedelta(0, 0, 0, 0, value)
2726
elif suffix == "h":
2727
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2728
elif suffix == "w":
2729
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2730
else:
2731
raise ValueError("Unknown suffix {!r}".format(suffix))
2732
except IndexError as e:
2733
raise ValueError(*(e.args))
2734
timevalue += delta
2735
return timevalue
2736
2737
2738
def daemon(nochdir = False, noclose = False):
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.error(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
604
605
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
global if_nametoindex
608
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
613
except (OSError, AttributeError):
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
618
def if_nametoindex(interface):
619
"Get an interface index the hard way, i.e. using fcntl()"
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
626
return interface_index
627
return if_nametoindex(interface)
628
629
630
def daemon(nochdir, noclose):
2739
631
"""See daemon(3). Standard BSD Unix function.
2740
2741
632
This should really exist as os.daemon, but it doesn't (yet)."""
2742
633
if os.fork():
2743
634
sys.exit()
2744
635
os.setsid()
2745
636
if not nochdir:
2746
637
os.chdir("/")
2747
if os.fork():
2748
sys.exit()
2749
638
if not noclose:
2750
639
# Close all standard open file descriptors
2751
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2752
641
if not stat.S_ISCHR(os.fstat(null).st_mode):
2753
642
raise OSError(errno.ENODEV,
2754
"{} not a character device"
2755
.format(os.devnull))
643
"/dev/null not a character device")
2756
644
os.dup2(null, sys.stdin.fileno())
2757
645
os.dup2(null, sys.stdout.fileno())
2758
646
os.dup2(null, sys.stderr.fileno())
2761
649
2762
650
2763
651
def main():
2764
2765
##################################################################
2766
# Parsing of options, both command line and config file
2767
2768
parser = argparse.ArgumentParser()
2769
parser.add_argument("-v", "--version", action="version",
2770
version = "%(prog)s {}".format(version),
2771
help="show version number and exit")
2772
parser.add_argument("-i", "--interface", metavar="IF",
2773
help="Bind to interface IF")
2774
parser.add_argument("-a", "--address",
2775
help="Address to listen for requests on")
2776
parser.add_argument("-p", "--port", type=int,
2777
help="Port number to receive requests on")
2778
parser.add_argument("--check", action="store_true",
2779
help="Run self-test")
2780
parser.add_argument("--debug", action="store_true",
2781
help="Debug mode; run in foreground and log"
2782
" to terminal", default=None)
2783
parser.add_argument("--debuglevel", metavar="LEVEL",
2784
help="Debug level for stdout output")
2785
parser.add_argument("--priority", help="GnuTLS"
2786
" priority string (see GnuTLS documentation)")
2787
parser.add_argument("--servicename",
2788
metavar="NAME", help="Zeroconf service name")
2789
parser.add_argument("--configdir",
2790
default="/etc/mandos", metavar="DIR",
2791
help="Directory to search for configuration"
2792
" files")
2793
parser.add_argument("--no-dbus", action="store_false",
2794
dest="use_dbus", help="Do not provide D-Bus"
2795
" system bus interface", default=None)
2796
parser.add_argument("--no-ipv6", action="store_false",
2797
dest="use_ipv6", help="Do not use IPv6",
2798
default=None)
2799
parser.add_argument("--no-restore", action="store_false",
2800
dest="restore", help="Do not restore stored"
2801
" state", default=None)
2802
parser.add_argument("--socket", type=int,
2803
help="Specify a file descriptor to a network"
2804
" socket to use instead of creating one")
2805
parser.add_argument("--statedir", metavar="DIR",
2806
help="Directory to save/restore state in")
2807
parser.add_argument("--foreground", action="store_true",
2808
help="Run in foreground", default=None)
2809
parser.add_argument("--no-zeroconf", action="store_false",
2810
dest="zeroconf", help="Do not use Zeroconf",
2811
default=None)
2812
2813
options = parser.parse_args()
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
2814
676
2815
677
if options.check:
2816
678
import doctest
2817
fail_count, test_count = doctest.testmod()
2818
sys.exit(os.EX_OK if fail_count == 0 else 1)
679
doctest.testmod()
680
sys.exit()
2819
681
2820
682
# Default values for config file for server-global settings
2821
683
server_defaults = { "interface": "",
2823
685
"port": "",
2824
686
"debug": "False",
2825
687
"priority":
2826
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2827
":+SIGN-DSA-SHA256",
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2828
689
"servicename": "Mandos",
2829
"use_dbus": "True",
2830
"use_ipv6": "True",
2831
"debuglevel": "",
2832
"restore": "True",
2833
"socket": "",
2834
"statedir": "/var/lib/mandos",
2835
"foreground": "False",
2836
"zeroconf": "True",
2837
}
690
}
2838
691
2839
692
# Parse config file for server-global settings
2840
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
2841
694
del server_defaults
2842
server_config.read(os.path.join(options.configdir, "mandos.conf"))
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
2843
697
# Convert the SafeConfigParser object to a dict
2844
server_settings = server_config.defaults()
2845
# Use the appropriate methods on the non-string config options
2846
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2847
server_settings[option] = server_config.getboolean("DEFAULT",
2848
option)
2849
if server_settings["port"]:
2850
server_settings["port"] = server_config.getint("DEFAULT",
2851
"port")
2852
if server_settings["socket"]:
2853
server_settings["socket"] = server_config.getint("DEFAULT",
2854
"socket")
2855
# Later, stdin will, and stdout and stderr might, be dup'ed
2856
# over with an opened os.devnull. But we don't want this to
2857
# happen with a supplied network socket.
2858
if 0 <= server_settings["socket"] <= 2:
2859
server_settings["socket"] = os.dup(server_settings
2860
["socket"])
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
2861
702
del server_config
2862
703
2863
704
# Override the settings from the config file with command line
2864
705
# options, if set.
2865
706
for option in ("interface", "address", "port", "debug",
2866
"priority", "servicename", "configdir", "use_dbus",
2867
"use_ipv6", "debuglevel", "restore", "statedir",
2868
"socket", "foreground", "zeroconf"):
707
"priority", "servicename", "configdir"):
2869
708
value = getattr(options, option)
2870
709
if value is not None:
2871
710
server_settings[option] = value
2872
711
del options
2873
# Force all strings to be unicode
2874
for option in server_settings.keys():
2875
if isinstance(server_settings[option], bytes):
2876
server_settings[option] = (server_settings[option]
2877
.decode("utf-8"))
2878
# Force all boolean options to be boolean
2879
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2880
"foreground", "zeroconf"):
2881
server_settings[option] = bool(server_settings[option])
2882
# Debug implies foreground
2883
if server_settings["debug"]:
2884
server_settings["foreground"] = True
2885
712
# Now we have our good server settings in "server_settings"
2886
713
2887
##################################################################
2888
2889
if (not server_settings["zeroconf"]
2890
and not (server_settings["port"]
2891
or server_settings["socket"] != "")):
2892
parser.error("Needs port or socket to work without Zeroconf")
2893
2894
# For convenience
2895
debug = server_settings["debug"]
2896
debuglevel = server_settings["debuglevel"]
2897
use_dbus = server_settings["use_dbus"]
2898
use_ipv6 = server_settings["use_ipv6"]
2899
stored_state_path = os.path.join(server_settings["statedir"],
2900
stored_state_file)
2901
foreground = server_settings["foreground"]
2902
zeroconf = server_settings["zeroconf"]
2903
2904
if debug:
2905
initlogger(debug, logging.DEBUG)
2906
else:
2907
if not debuglevel:
2908
initlogger(debug)
2909
else:
2910
level = getattr(logging, debuglevel.upper())
2911
initlogger(debug, level)
2912
2913
if server_settings["servicename"] != "Mandos":
2914
syslogger.setFormatter(
2915
logging.Formatter('Mandos ({}) [%(process)d]:'
2916
' %(levelname)s: %(message)s'.format(
2917
server_settings["servicename"])))
2918
2919
714
# Parse config file with clients
2920
client_config = configparser.SafeConfigParser(Client
2921
.client_defaults)
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
718
}
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
2922
720
client_config.read(os.path.join(server_settings["configdir"],
2923
721
"clients.conf"))
2924
722
2925
global mandos_dbus_service
2926
mandos_dbus_service = None
2927
2928
socketfd = None
2929
if server_settings["socket"] != "":
2930
socketfd = server_settings["socket"]
2931
tcp_server = MandosServer(
2932
(server_settings["address"], server_settings["port"]),
2933
ClientHandler,
2934
interface=(server_settings["interface"] or None),
2935
use_ipv6=use_ipv6,
2936
gnutls_priority=server_settings["priority"],
2937
use_dbus=use_dbus,
2938
socketfd=socketfd)
2939
if not foreground:
2940
pidfilename = "/run/mandos.pid"
2941
if not os.path.isdir("/run/."):
2942
pidfilename = "/var/run/mandos.pid"
2943
pidfile = None
2944
try:
2945
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2946
except IOError as e:
2947
logger.error("Could not open file %r", pidfilename,
2948
exc_info=e)
2949
2950
for name, group in (("_mandos", "_mandos"),
2951
("mandos", "mandos"),
2952
("nobody", "nogroup")):
2953
try:
2954
uid = pwd.getpwnam(name).pw_uid
2955
gid = pwd.getpwnam(group).pw_gid
2956
break
2957
except KeyError:
2958
continue
2959
else:
2960
uid = 65534
2961
gid = 65534
2962
try:
2963
os.setgid(gid)
2964
os.setuid(uid)
2965
if debug:
2966
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2967
gid))
2968
except OSError as error:
2969
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2970
.format(uid, gid, os.strerror(error.errno)))
2971
if error.errno != errno.EPERM:
2972
raise
2973
2974
if debug:
2975
# Enable all possible GnuTLS debugging
2976
2977
# "Use a log level over 10 to enable all debugging options."
2978
# - GnuTLS manual
2979
gnutls.global_set_log_level(11)
2980
2981
@gnutls.log_func
2982
def debug_gnutls(level, string):
2983
logger.debug("GnuTLS: %s", string[:-1])
2984
2985
gnutls.global_set_log_function(debug_gnutls)
2986
2987
# Redirect stdin so all checkers get /dev/null
2988
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2989
os.dup2(null, sys.stdin.fileno())
2990
if null > 2:
2991
os.close(null)
2992
2993
# Need to fork before connecting to D-Bus
2994
if not foreground:
2995
# Close all input and output, do double fork, etc.
2996
daemon()
2997
2998
# multiprocessing will use threads, so before we use GLib we need
2999
# to inform GLib that threads will be used.
3000
GLib.threads_init()
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
3001
728
3002
729
global main_loop
730
global bus
731
global server
3003
732
# From the Avahi example code
3004
DBusGMainLoop(set_as_default=True)
3005
main_loop = GLib.MainLoop()
733
DBusGMainLoop(set_as_default=True )
734
main_loop = gobject.MainLoop()
3006
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
3007
739
# End of Avahi example code
3008
if use_dbus:
3009
try:
3010
bus_name = dbus.service.BusName("se.recompile.Mandos",
3011
bus,
3012
do_not_queue=True)
3013
old_bus_name = dbus.service.BusName(
3014
"se.bsnet.fukt.Mandos", bus,
3015
do_not_queue=True)
3016
except dbus.exceptions.DBusException as e:
3017
logger.error("Disabling D-Bus:", exc_info=e)
3018
use_dbus = False
3019
server_settings["use_dbus"] = False
3020
tcp_server.use_dbus = False
3021
if zeroconf:
3022
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3023
service = AvahiServiceToSyslog(
3024
name = server_settings["servicename"],
3025
servicetype = "_mandos._tcp",
3026
protocol = protocol,
3027
bus = bus)
3028
if server_settings["interface"]:
3029
service.interface = if_nametoindex(
3030
server_settings["interface"].encode("utf-8"))
3031
3032
global multiprocessing_manager
3033
multiprocessing_manager = multiprocessing.Manager()
3034
3035
client_class = Client
3036
if use_dbus:
3037
client_class = functools.partial(ClientDBus, bus = bus)
3038
3039
client_settings = Client.config_parser(client_config)
3040
old_client_settings = {}
3041
clients_data = {}
3042
3043
# This is used to redirect stdout and stderr for checker processes
3044
global wnull
3045
wnull = open(os.devnull, "w") # A writable /dev/null
3046
# Only used if server is running in foreground but not in debug
3047
# mode
3048
if debug or not foreground:
3049
wnull.close()
3050
3051
# Get client data and settings from last running state.
3052
if server_settings["restore"]:
3053
try:
3054
with open(stored_state_path, "rb") as stored_state:
3055
if sys.version_info.major == 2:
3056
clients_data, old_client_settings = pickle.load(
3057
stored_state)
3058
else:
3059
bytes_clients_data, bytes_old_client_settings = (
3060
pickle.load(stored_state, encoding = "bytes"))
3061
### Fix bytes to strings
3062
## clients_data
3063
# .keys()
3064
clients_data = { (key.decode("utf-8")
3065
if isinstance(key, bytes)
3066
else key): value
3067
for key, value in
3068
bytes_clients_data.items() }
3069
del bytes_clients_data
3070
for key in clients_data:
3071
value = { (k.decode("utf-8")
3072
if isinstance(k, bytes) else k): v
3073
for k, v in
3074
clients_data[key].items() }
3075
clients_data[key] = value
3076
# .client_structure
3077
value["client_structure"] = [
3078
(s.decode("utf-8")
3079
if isinstance(s, bytes)
3080
else s) for s in
3081
value["client_structure"] ]
3082
# .name & .host
3083
for k in ("name", "host"):
3084
if isinstance(value[k], bytes):
3085
value[k] = value[k].decode("utf-8")
3086
## old_client_settings
3087
# .keys()
3088
old_client_settings = {
3089
(key.decode("utf-8")
3090
if isinstance(key, bytes)
3091
else key): value
3092
for key, value in
3093
bytes_old_client_settings.items() }
3094
del bytes_old_client_settings
3095
# .host
3096
for value in old_client_settings.values():
3097
if isinstance(value["host"], bytes):
3098
value["host"] = (value["host"]
3099
.decode("utf-8"))
3100
os.remove(stored_state_path)
3101
except IOError as e:
3102
if e.errno == errno.ENOENT:
3103
logger.warning("Could not load persistent state:"
3104
" {}".format(os.strerror(e.errno)))
3105
else:
3106
logger.critical("Could not load persistent state:",
3107
exc_info=e)
3108
raise
3109
except EOFError as e:
3110
logger.warning("Could not load persistent state: "
3111
"EOFError:",
3112
exc_info=e)
3113
3114
with PGPEngine() as pgp:
3115
for client_name, client in clients_data.items():
3116
# Skip removed clients
3117
if client_name not in client_settings:
3118
continue
3119
3120
# Decide which value to use after restoring saved state.
3121
# We have three different values: Old config file,
3122
# new config file, and saved state.
3123
# New config value takes precedence if it differs from old
3124
# config value, otherwise use saved state.
3125
for name, value in client_settings[client_name].items():
3126
try:
3127
# For each value in new config, check if it
3128
# differs from the old config value (Except for
3129
# the "secret" attribute)
3130
if (name != "secret"
3131
and (value !=
3132
old_client_settings[client_name][name])):
3133
client[name] = value
3134
except KeyError:
3135
pass
3136
3137
# Clients who has passed its expire date can still be
3138
# enabled if its last checker was successful. A Client
3139
# whose checker succeeded before we stored its state is
3140
# assumed to have successfully run all checkers during
3141
# downtime.
3142
if client["enabled"]:
3143
if datetime.datetime.utcnow() >= client["expires"]:
3144
if not client["last_checked_ok"]:
3145
logger.warning(
3146
"disabling client {} - Client never "
3147
"performed a successful checker".format(
3148
client_name))
3149
client["enabled"] = False
3150
elif client["last_checker_status"] != 0:
3151
logger.warning(
3152
"disabling client {} - Client last"
3153
" checker failed with error code"
3154
" {}".format(
3155
client_name,
3156
client["last_checker_status"]))
3157
client["enabled"] = False
3158
else:
3159
client["expires"] = (
3160
datetime.datetime.utcnow()
3161
+ client["timeout"])
3162
logger.debug("Last checker succeeded,"
3163
" keeping {} enabled".format(
3164
client_name))
3165
try:
3166
client["secret"] = pgp.decrypt(
3167
client["encrypted_secret"],
3168
client_settings[client_name]["secret"])
3169
except PGPError:
3170
# If decryption fails, we use secret from new settings
3171
logger.debug("Failed to decrypt {} old secret".format(
3172
client_name))
3173
client["secret"] = (client_settings[client_name]
3174
["secret"])
3175
3176
# Add/remove clients based on new changes made to config
3177
for client_name in (set(old_client_settings)
3178
- set(client_settings)):
3179
del clients_data[client_name]
3180
for client_name in (set(client_settings)
3181
- set(old_client_settings)):
3182
clients_data[client_name] = client_settings[client_name]
3183
3184
# Create all client objects
3185
for client_name, client in clients_data.items():
3186
tcp_server.clients[client_name] = client_class(
3187
name = client_name,
3188
settings = client,
3189
server_settings = server_settings)
3190
3191
if not tcp_server.clients:
3192
logger.warning("No clients defined")
3193
3194
if not foreground:
3195
if pidfile is not None:
3196
pid = os.getpid()
3197
try:
3198
with pidfile:
3199
print(pid, file=pidfile)
3200
except IOError:
3201
logger.error("Could not write to file %r with PID %d",
3202
pidfilename, pid)
3203
del pidfile
3204
del pidfilename
3205
3206
for termsig in (signal.SIGHUP, signal.SIGTERM):
3207
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3208
lambda: main_loop.quit() and False)
3209
3210
if use_dbus:
3211
3212
@alternate_dbus_interfaces(
3213
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3214
class MandosDBusService(DBusObjectWithObjectManager):
3215
"""A D-Bus proxy object"""
3216
3217
def __init__(self):
3218
dbus.service.Object.__init__(self, bus, "/")
3219
3220
_interface = "se.recompile.Mandos"
3221
3222
@dbus.service.signal(_interface, signature="o")
3223
def ClientAdded(self, objpath):
3224
"D-Bus signal"
3225
pass
3226
3227
@dbus.service.signal(_interface, signature="ss")
3228
def ClientNotFound(self, fingerprint, address):
3229
"D-Bus signal"
3230
pass
3231
3232
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3233
"true"})
3234
@dbus.service.signal(_interface, signature="os")
3235
def ClientRemoved(self, objpath, name):
3236
"D-Bus signal"
3237
pass
3238
3239
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3240
"true"})
3241
@dbus.service.method(_interface, out_signature="ao")
3242
def GetAllClients(self):
3243
"D-Bus method"
3244
return dbus.Array(c.dbus_object_path for c in
3245
tcp_server.clients.values())
3246
3247
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3248
"true"})
3249
@dbus.service.method(_interface,
3250
out_signature="a{oa{sv}}")
3251
def GetAllClientsWithProperties(self):
3252
"D-Bus method"
3253
return dbus.Dictionary(
3254
{ c.dbus_object_path: c.GetAll(
3255
"se.recompile.Mandos.Client")
3256
for c in tcp_server.clients.values() },
3257
signature="oa{sv}")
3258
3259
@dbus.service.method(_interface, in_signature="o")
3260
def RemoveClient(self, object_path):
3261
"D-Bus method"
3262
for c in tcp_server.clients.values():
3263
if c.dbus_object_path == object_path:
3264
del tcp_server.clients[c.name]
3265
c.remove_from_connection()
3266
# Don't signal the disabling
3267
c.disable(quiet=True)
3268
# Emit D-Bus signal for removal
3269
self.client_removed_signal(c)
3270
return
3271
raise KeyError(object_path)
3272
3273
del _interface
3274
3275
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3276
out_signature = "a{oa{sa{sv}}}")
3277
def GetManagedObjects(self):
3278
"""D-Bus method"""
3279
return dbus.Dictionary(
3280
{ client.dbus_object_path:
3281
dbus.Dictionary(
3282
{ interface: client.GetAll(interface)
3283
for interface in
3284
client._get_all_interface_names()})
3285
for client in tcp_server.clients.values()})
3286
3287
def client_added_signal(self, client):
3288
"""Send the new standard signal and the old signal"""
3289
if use_dbus:
3290
# New standard signal
3291
self.InterfacesAdded(
3292
client.dbus_object_path,
3293
dbus.Dictionary(
3294
{ interface: client.GetAll(interface)
3295
for interface in
3296
client._get_all_interface_names()}))
3297
# Old signal
3298
self.ClientAdded(client.dbus_object_path)
3299
3300
def client_removed_signal(self, client):
3301
"""Send the new standard signal and the old signal"""
3302
if use_dbus:
3303
# New standard signal
3304
self.InterfacesRemoved(
3305
client.dbus_object_path,
3306
client._get_all_interface_names())
3307
# Old signal
3308
self.ClientRemoved(client.dbus_object_path,
3309
client.name)
3310
3311
mandos_dbus_service = MandosDBusService()
3312
3313
# Save modules to variables to exempt the modules from being
3314
# unloaded before the function registered with atexit() is run.
3315
mp = multiprocessing
3316
wn = wnull
740
741
debug = server_settings["debug"]
742
743
if debug:
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.critical(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name = section,
759
stop_hook = remove_from_clients,
760
config
761
= dict(client_config.items(section)))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
766
3317
767
def cleanup():
3318
768
"Cleanup function; run on exit"
3319
if zeroconf:
3320
service.cleanup()
3321
3322
mp.active_children()
3323
wn.close()
3324
if not (tcp_server.clients or client_settings):
3325
return
3326
3327
# Store client before exiting. Secrets are encrypted with key
3328
# based on what config file has. If config file is
3329
# removed/edited, old secret will thus be unrecovable.
3330
clients = {}
3331
with PGPEngine() as pgp:
3332
for client in tcp_server.clients.values():
3333
key = client_settings[client.name]["secret"]
3334
client.encrypted_secret = pgp.encrypt(client.secret,
3335
key)
3336
client_dict = {}
3337
3338
# A list of attributes that can not be pickled
3339
# + secret.
3340
exclude = { "bus", "changedstate", "secret",
3341
"checker", "server_settings" }
3342
for name, typ in inspect.getmembers(dbus.service
3343
.Object):
3344
exclude.add(name)
3345
3346
client_dict["encrypted_secret"] = (client
3347
.encrypted_secret)
3348
for attr in client.client_structure:
3349
if attr not in exclude:
3350
client_dict[attr] = getattr(client, attr)
3351
3352
clients[client.name] = client_dict
3353
del client_settings[client.name]["secret"]
3354
3355
try:
3356
with tempfile.NamedTemporaryFile(
3357
mode='wb',
3358
suffix=".pickle",
3359
prefix='clients-',
3360
dir=os.path.dirname(stored_state_path),
3361
delete=False) as stored_state:
3362
pickle.dump((clients, client_settings), stored_state,
3363
protocol = 2)
3364
tempname = stored_state.name
3365
os.rename(tempname, stored_state_path)
3366
except (IOError, OSError) as e:
3367
if not debug:
3368
try:
3369
os.remove(tempname)
3370
except NameError:
3371
pass
3372
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3373
logger.warning("Could not save persistent state: {}"
3374
.format(os.strerror(e.errno)))
3375
else:
3376
logger.warning("Could not save persistent state:",
3377
exc_info=e)
3378
raise
3379
3380
# Delete all clients, and settings from config
3381
while tcp_server.clients:
3382
name, client = tcp_server.clients.popitem()
3383
if use_dbus:
3384
client.remove_from_connection()
3385
# Don't signal the disabling
3386
client.disable(quiet=True)
3387
# Emit D-Bus signal for removal
3388
if use_dbus:
3389
mandos_dbus_service.client_removed_signal(client)
3390
client_settings.clear()
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
3391
780
3392
781
atexit.register(cleanup)
3393
782
3394
for client in tcp_server.clients.values():
3395
if use_dbus:
3396
# Emit D-Bus signal for adding
3397
mandos_dbus_service.client_added_signal(client)
3398
# Need to initiate checking of clients
3399
if client.enabled:
3400
client.init_checker()
3401
3402
tcp_server.enable()
3403
tcp_server.server_activate()
3404
783
if not debug:
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
787
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
3405
796
# Find out what port we got
3406
if zeroconf:
3407
service.port = tcp_server.socket.getsockname()[1]
3408
if use_ipv6:
3409
logger.info("Now listening on address %r, port %d,"
3410
" flowinfo %d, scope_id %d",
3411
*tcp_server.socket.getsockname())
3412
else: # IPv4
3413
logger.info("Now listening on address %r, port %d",
3414
*tcp_server.socket.getsockname())
797
service.port = tcp_server.socket.getsockname()[1]
798
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
3415
800
3416
801
#service.interface = tcp_server.socket.getsockname()[3]
3417
802
3418
803
try:
3419
if zeroconf:
3420
# From the Avahi example code
3421
try:
3422
service.activate()
3423
except dbus.exceptions.DBusException as error:
3424
logger.critical("D-Bus Exception", exc_info=error)
3425
cleanup()
3426
sys.exit(1)
3427
# End of Avahi example code
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
806
try:
807
server_state_changed(server.GetState())
808
except dbus.exceptions.DBusException, error:
809
logger.critical(u"DBusException: %s", error)
810
sys.exit(1)
811
# End of Avahi example code
3428
812
3429
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3430
lambda *args, **kwargs:
3431
(tcp_server.handle_request
3432
(*args[2:], **kwargs) or True))
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
814
lambda *args, **kwargs:
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
3433
817
3434
818
logger.debug("Starting main loop")
819
main_loop_started = True
3435
820
main_loop.run()
3436
except AvahiError as error:
3437
logger.critical("Avahi Error", exc_info=error)
3438
cleanup()
821
except AvahiError, error:
822
logger.critical(u"AvahiError: %s" + unicode(error))
3439
823
sys.exit(1)
3440
824
except KeyboardInterrupt:
3441
825
if debug:
3442
print("", file=sys.stderr)
3443
logger.debug("Server received KeyboardInterrupt")
3444
logger.debug("Server exiting")
3445
# Must run before the D-Bus bus name gets deregistered
3446
cleanup()
3447
826
print
3448
827
3449
828
if __name__ == '__main__':
3450
829
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0