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- Committer: Teddy Hogeborn
- Date: 2009-01-31 10:33:17 UTC
- mfrom: (24.1.129 mandos)
- Revision ID: teddy@fukt.bsnet.se-20090131103317-wzqvyr532sjcjt7u
Merge from Björn:
* mandos-ctl: New option "--remove-client". Only default to listing
clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
network interface. New option "--delay"
to control the maximum delay to wait for
running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
"--delay".
* mandos-ctl: New option "--remove-client". Only default to listing
clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
network interface. New option "--delay"
to control the maximum delay to wait for
running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
"--delay".
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
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".
12
#
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
13
# Everything else is
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
34
35
from __future__ import (division, absolute_import, print_function,
36
unicode_literals)
37
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
47
37
import socket
48
import argparse
38
import optparse
49
39
import datetime
50
40
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser
55
48
import sys
56
49
import re
57
50
import os
58
51
import signal
52
from sets import Set
59
53
import subprocess
60
54
import atexit
61
55
import stat
62
56
import logging
63
57
import logging.handlers
64
58
import pwd
65
import contextlib
66
import struct
67
import fcntl
68
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
59
from contextlib import closing
80
60
81
61
import dbus
82
62
import dbus.service
83
import gi
84
from gi.repository import GLib
63
import gobject
64
import avahi
85
65
from dbus.mainloop.glib import DBusGMainLoop
86
66
import ctypes
87
67
import ctypes.util
88
import xml.dom.minidom
89
import inspect
90
91
# Try to find the value of SO_BINDTODEVICE:
92
try:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
95
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
96
except AttributeError:
97
try:
98
# This is where SO_BINDTODEVICE was up to and including Python
99
# 2.6, and also 3.2:
100
from IN import SO_BINDTODEVICE
101
except ImportError:
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
104
try:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
"/dev/stdin"],
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
113
# No value found
114
SO_BINDTODEVICE = None
115
116
if sys.version_info.major == 2:
117
str = unicode
118
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
121
122
version = "1.8.6"
123
stored_state_file = "clients.pickle"
124
125
logger = logging.getLogger()
126
syslogger = None
127
128
try:
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
131
except (OSError, AttributeError):
132
133
def if_nametoindex(interface):
134
"Get an interface index the hard way, i.e. using fcntl()"
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
136
with contextlib.closing(socket.socket()) as s:
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
140
return interface_index
141
142
143
def copy_function(func):
144
"""Make a copy of a function"""
145
if sys.version_info.major == 2:
146
return types.FunctionType(func.func_code,
147
func.func_globals,
148
func.func_name,
149
func.func_defaults,
150
func.func_closure)
151
else:
152
return types.FunctionType(func.__code__,
153
func.__globals__,
154
func.__name__,
155
func.__defaults__,
156
func.__closure__)
157
158
159
def initlogger(debug, level=logging.WARNING):
160
"""init logger and add loglevel"""
161
162
global syslogger
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
165
address="/dev/log"))
166
syslogger.setFormatter(logging.Formatter
167
('Mandos [%(process)d]: %(levelname)s:'
168
' %(message)s'))
169
logger.addHandler(syslogger)
170
171
if debug:
172
console = logging.StreamHandler()
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
174
' [%(process)d]:'
175
' %(levelname)s:'
176
' %(message)s'))
177
logger.addHandler(console)
178
logger.setLevel(level)
179
180
181
class PGPError(Exception):
182
"""Exception if encryption/decryption fails"""
183
pass
184
185
186
class PGPEngine(object):
187
"""A simple class for OpenPGP symmetric encryption & decryption"""
188
189
def __init__(self):
190
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
191
self.gpg = "gpg"
192
try:
193
output = subprocess.check_output(["gpgconf"])
194
for line in output.splitlines():
195
name, text, path = line.split(b":")
196
if name == "gpg":
197
self.gpg = path
198
break
199
except OSError as e:
200
if e.errno != errno.ENOENT:
201
raise
202
self.gnupgargs = ['--batch',
203
'--homedir', self.tempdir,
204
'--force-mdc',
205
'--quiet']
206
# Only GPG version 1 has the --no-use-agent option.
207
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
208
self.gnupgargs.append("--no-use-agent")
209
210
def __enter__(self):
211
return self
212
213
def __exit__(self, exc_type, exc_value, traceback):
214
self._cleanup()
215
return False
216
217
def __del__(self):
218
self._cleanup()
219
220
def _cleanup(self):
221
if self.tempdir is not None:
222
# Delete contents of tempdir
223
for root, dirs, files in os.walk(self.tempdir,
224
topdown=False):
225
for filename in files:
226
os.remove(os.path.join(root, filename))
227
for dirname in dirs:
228
os.rmdir(os.path.join(root, dirname))
229
# Remove tempdir
230
os.rmdir(self.tempdir)
231
self.tempdir = None
232
233
def password_encode(self, password):
234
# Passphrase can not be empty and can not contain newlines or
235
# NUL bytes. So we prefix it and hex encode it.
236
encoded = b"mandos" + binascii.hexlify(password)
237
if len(encoded) > 2048:
238
# GnuPG can't handle long passwords, so encode differently
239
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
240
.replace(b"\n", b"\\n")
241
.replace(b"\0", b"\\x00"))
242
return encoded
243
244
def encrypt(self, data, password):
245
passphrase = self.password_encode(password)
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
248
passfile.write(passphrase)
249
passfile.flush()
250
proc = subprocess.Popen([self.gpg, '--symmetric',
251
'--passphrase-file',
252
passfile.name]
253
+ self.gnupgargs,
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
258
if proc.returncode != 0:
259
raise PGPError(err)
260
return ciphertext
261
262
def decrypt(self, data, password):
263
passphrase = self.password_encode(password)
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
266
passfile.write(passphrase)
267
passfile.flush()
268
proc = subprocess.Popen([self.gpg, '--decrypt',
269
'--passphrase-file',
270
passfile.name]
271
+ self.gnupgargs,
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
276
if proc.returncode != 0:
277
raise PGPError(err)
278
return decrypted_plaintext
279
280
281
# Pretend that we have an Avahi module
282
class avahi(object):
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
292
293
@staticmethod
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
305
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
306
83
307
84
class AvahiError(Exception):
308
85
def __init__(self, value, *args, **kwargs):
309
86
self.value = value
310
return super(AvahiError, self).__init__(value, *args,
311
**kwargs)
312
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
313
90
314
91
class AvahiServiceError(AvahiError):
315
92
pass
316
93
317
318
94
class AvahiGroupError(AvahiError):
319
95
pass
320
96
321
97
322
98
class AvahiService(object):
323
99
"""An Avahi (Zeroconf) service.
324
325
100
Attributes:
326
101
interface: integer; avahi.IF_UNSPEC or an interface index.
327
102
Used to optionally bind to the specified interface.
328
103
name: string; Example: 'Mandos'
329
104
type: string; Example: '_mandos._tcp'.
330
See <https://www.iana.org/assignments/service-names-port-numbers>
105
See <http://www.dns-sd.org/ServiceTypes.html>
331
106
port: integer; what port to announce
332
107
TXT: list of strings; TXT record for the service
333
108
domain: string; Domain to publish on, default to .local if empty.
335
110
max_renames: integer; maximum number of renames
336
111
rename_count: integer; counter so we only rename after collisions
337
112
a sensible number of times
338
group: D-Bus Entry Group
339
server: D-Bus Server
340
bus: dbus.SystemBus()
341
113
"""
342
343
def __init__(self,
344
interface=avahi.IF_UNSPEC,
345
name=None,
346
servicetype=None,
347
port=None,
348
TXT=None,
349
domain="",
350
host="",
351
max_renames=32768,
352
protocol=avahi.PROTO_UNSPEC,
353
bus=None):
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
354
117
self.interface = interface
355
118
self.name = name
356
119
self.type = servicetype
360
123
self.host = host
361
124
self.rename_count = 0
362
125
self.max_renames = max_renames
363
self.protocol = protocol
364
self.group = None # our entry group
365
self.server = None
366
self.bus = bus
367
self.entry_group_state_changed_match = None
368
369
def rename(self, remove=True):
126
def rename(self):
370
127
"""Derived from the Avahi example code"""
371
128
if self.rename_count >= self.max_renames:
372
logger.critical("No suitable Zeroconf service name found"
373
" after %i retries, exiting.",
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
374
131
self.rename_count)
375
raise AvahiServiceError("Too many renames")
376
self.name = str(
377
self.server.GetAlternativeServiceName(self.name))
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
378
141
self.rename_count += 1
379
logger.info("Changing Zeroconf service name to %r ...",
380
self.name)
381
if remove:
382
self.remove()
383
try:
384
self.add()
385
except dbus.exceptions.DBusException as error:
386
if (error.get_dbus_name()
387
== "org.freedesktop.Avahi.CollisionError"):
388
logger.info("Local Zeroconf service name collision.")
389
return self.rename(remove=False)
390
else:
391
logger.critical("D-Bus Exception", exc_info=error)
392
self.cleanup()
393
os._exit(1)
394
395
142
def remove(self):
396
143
"""Derived from the Avahi example code"""
397
if self.entry_group_state_changed_match is not None:
398
self.entry_group_state_changed_match.remove()
399
self.entry_group_state_changed_match = None
400
if self.group is not None:
401
self.group.Reset()
402
144
if group is not None:
145
group.Reset()
403
146
def add(self):
404
147
"""Derived from the Avahi example code"""
405
self.remove()
406
if self.group is None:
407
self.group = dbus.Interface(
408
self.bus.get_object(avahi.DBUS_NAME,
409
self.server.EntryGroupNew()),
410
avahi.DBUS_INTERFACE_ENTRY_GROUP)
411
self.entry_group_state_changed_match = (
412
self.group.connect_to_signal(
413
'StateChanged', self.entry_group_state_changed))
414
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
415
self.name, self.type)
416
self.group.AddService(
417
self.interface,
418
self.protocol,
419
dbus.UInt32(0), # flags
420
self.name, self.type,
421
self.domain, self.host,
422
dbus.UInt16(self.port),
423
avahi.string_array_to_txt_array(self.TXT))
424
self.group.Commit()
425
426
def entry_group_state_changed(self, state, error):
427
"""Derived from the Avahi example code"""
428
logger.debug("Avahi entry group state change: %i", state)
429
430
if state == avahi.ENTRY_GROUP_ESTABLISHED:
431
logger.debug("Zeroconf service established.")
432
elif state == avahi.ENTRY_GROUP_COLLISION:
433
logger.info("Zeroconf service name collision.")
434
self.rename()
435
elif state == avahi.ENTRY_GROUP_FAILURE:
436
logger.critical("Avahi: Error in group state changed %s",
437
str(error))
438
raise AvahiGroupError("State changed: {!s}".format(error))
439
440
def cleanup(self):
441
"""Derived from the Avahi example code"""
442
if self.group is not None:
443
try:
444
self.group.Free()
445
except (dbus.exceptions.UnknownMethodException,
446
dbus.exceptions.DBusException):
447
pass
448
self.group = None
449
self.remove()
450
451
def server_state_changed(self, state, error=None):
452
"""Derived from the Avahi example code"""
453
logger.debug("Avahi server state change: %i", state)
454
bad_states = {
455
avahi.SERVER_INVALID: "Zeroconf server invalid",
456
avahi.SERVER_REGISTERING: None,
457
avahi.SERVER_COLLISION: "Zeroconf server name collision",
458
avahi.SERVER_FAILURE: "Zeroconf server failure",
459
}
460
if state in bad_states:
461
if bad_states[state] is not None:
462
if error is None:
463
logger.error(bad_states[state])
464
else:
465
logger.error(bad_states[state] + ": %r", error)
466
self.cleanup()
467
elif state == avahi.SERVER_RUNNING:
468
try:
469
self.add()
470
except dbus.exceptions.DBusException as error:
471
if (error.get_dbus_name()
472
== "org.freedesktop.Avahi.CollisionError"):
473
logger.info("Local Zeroconf service name"
474
" collision.")
475
return self.rename(remove=False)
476
else:
477
logger.critical("D-Bus Exception", exc_info=error)
478
self.cleanup()
479
os._exit(1)
480
else:
481
if error is None:
482
logger.debug("Unknown state: %r", state)
483
else:
484
logger.debug("Unknown state: %r: %r", state, error)
485
486
def activate(self):
487
"""Derived from the Avahi example code"""
488
if self.server is None:
489
self.server = dbus.Interface(
490
self.bus.get_object(avahi.DBUS_NAME,
491
avahi.DBUS_PATH_SERVER,
492
follow_name_owner_changes=True),
493
avahi.DBUS_INTERFACE_SERVER)
494
self.server.connect_to_signal("StateChanged",
495
self.server_state_changed)
496
self.server_state_changed(self.server.GetState())
497
498
499
class AvahiServiceToSyslog(AvahiService):
500
def rename(self, *args, **kwargs):
501
"""Add the new name to the syslog messages"""
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
505
.format(self.name)))
506
return ret
507
508
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
512
513
library = ctypes.util.find_library("gnutls")
514
if library is None:
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
517
del library
518
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
521
522
# Constants
523
E_SUCCESS = 0
524
E_INTERRUPTED = -52
525
E_AGAIN = -28
526
CRT_OPENPGP = 2
527
CRT_RAWPK = 3
528
CLIENT = 2
529
SHUT_RDWR = 0
530
CRD_CERTIFICATE = 1
531
E_NO_CERTIFICATE_FOUND = -49
532
X509_FMT_DER = 0
533
NO_TICKETS = 1<<10
534
ENABLE_RAWPK = 1<<18
535
CTYPE_PEERS = 3
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
568
# gnutls.strerror()
569
self.code = code
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
573
message, *args)
574
575
class CertificateSecurityError(Error):
576
pass
577
578
# Classes
579
class Credentials(object):
580
def __init__(self):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
585
586
def __del__(self):
587
gnutls.certificate_free_credentials(self._c_object)
588
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
595
if gnutls.has_rawpk:
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
598
del gnutls_flags
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
602
True)
603
self.socket = socket
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
608
ctypes.c_void_p))
609
self.credentials = credentials
610
611
def __del__(self):
612
gnutls.deinit(self._c_object)
613
614
def handshake(self):
615
return gnutls.handshake(self._c_object)
616
617
def send(self, data):
618
data = bytes(data)
619
data_len = len(data)
620
while data_len > 0:
621
data_len -= gnutls.record_send(self._c_object,
622
data[-data_len:],
623
data_len)
624
625
def bye(self):
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
627
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
632
if result >= 0:
633
return result
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
637
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
641
while result < 0:
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
645
return result
646
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
649
650
# Functions
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
655
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
659
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
663
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
666
ctypes.c_size_t]
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
669
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
675
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
681
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
685
ctypes.c_int]
686
handshake_set_private_extensions.restype = None
687
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
690
ctypes.c_void_p]
691
credentials_set.restype = _error_code
692
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
696
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
700
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
705
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
709
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
713
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
717
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
722
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
726
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
731
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
735
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
740
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
743
744
if has_rawpk:
745
# Types
746
class pubkey_st(ctypes.Structure):
747
_fields = []
748
pubkey_t = ctypes.POINTER(pubkey_st)
749
750
x509_crt_fmt_t = ctypes.c_int
751
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
756
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
759
x509_crt_fmt_t]
760
pubkey_import.restype = _error_code
761
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
767
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
771
else:
772
# All the function declarations below are from gnutls/openpgp.h
773
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
777
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
781
openpgp_crt_fmt_t]
782
openpgp_crt_import.restype = _error_code
783
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
788
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
792
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
796
ctypes.c_void_p,
797
ctypes.POINTER(
798
ctypes.c_size_t)]
799
openpgp_crt_get_fingerprint.restype = _error_code
800
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
805
806
# Remove non-public functions
807
del _error_code, _retry_on_error
808
809
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
813
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
816
"""
817
connection.send(func(*args, **kwargs))
818
connection.close()
819
820
821
class Client(object):
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
822
179
"""A representation of a client host served by this server.
823
824
180
Attributes:
825
approved: bool(); 'None' if not yet approved/disapproved
826
approval_delay: datetime.timedelta(); Time to wait for approval
827
approval_duration: datetime.timedelta(); Duration of one approval
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
830
running.
831
checker_callback_tag: a GLib event source tag, or None
832
checker_command: string; External command which is run to check
833
if client lives. %() expansions are done at
834
runtime with vars(self) as dict, so that for
835
instance %(name)s can be used in the command.
836
checker_initiator_tag: a GLib event source tag, or None
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
183
fingerprint: string (40 or 32 hexadecimal digits); used to
184
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
837
187
created: datetime.datetime(); (UTC) object creation
838
client_structure: Object describing what attributes a client has
839
and is used for storing the client at exit
840
current_checker_command: string; current running checker_command
841
disable_initiator_tag: a GLib event source tag, or None
188
last_enabled: datetime.datetime(); (UTC)
842
189
enabled: bool()
843
fingerprint: string (40 or 32 hexadecimal digits); used to
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
847
host: string; available for use by the checker command
848
interval: datetime.timedelta(); How often to start a new checker
849
last_approval_request: datetime.datetime(); (UTC) or None
850
190
last_checked_ok: datetime.datetime(); (UTC) or None
851
last_checker_status: integer between 0 and 255 reflecting exit
852
status of last checker. -1 reflects crashed
853
checker, -2 means no checker completed yet.
854
last_checker_signal: The signal which killed the last checker, if
855
last_checker_status is -1
856
last_enabled: datetime.datetime(); (UTC) or None
857
name: string; from the config file, used in log messages and
858
D-Bus identifiers
859
secret: bytestring; sent verbatim (over TLS) to client
860
191
timeout: datetime.timedelta(); How long from last_checked_ok
861
until this client is disabled
862
extended_timeout: extra long timeout when secret has been sent
863
runtime_expansions: Allowed attributes for runtime expansion.
864
expires: datetime.datetime(); time (UTC) when a client will be
865
disabled, or None
866
server_settings: The server_settings dict from main()
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
867
207
"""
868
869
runtime_expansions = ("approval_delay", "approval_duration",
870
"created", "enabled", "expires", "key_id",
871
"fingerprint", "host", "interval",
872
"last_approval_request", "last_checked_ok",
873
"last_enabled", "name", "timeout")
874
client_defaults = {
875
"timeout": "PT5M",
876
"extended_timeout": "PT15M",
877
"interval": "PT2M",
878
"checker": "fping -q -- %%(host)s",
879
"host": "",
880
"approval_delay": "PT0S",
881
"approval_duration": "PT1S",
882
"approved_by_default": "True",
883
"enabled": "True",
884
}
885
886
@staticmethod
887
def config_parser(config):
888
"""Construct a new dict of client settings of this form:
889
{ client_name: {setting_name: value, ...}, ...}
890
with exceptions for any special settings as defined above.
891
NOTE: Must be a pure function. Must return the same result
892
value given the same arguments.
893
"""
894
settings = {}
895
for client_name in config.sections():
896
section = dict(config.items(client_name))
897
client = settings[client_name] = {}
898
899
client["host"] = section["host"]
900
# Reformat values from string types to Python types
901
client["approved_by_default"] = config.getboolean(
902
client_name, "approved_by_default")
903
client["enabled"] = config.getboolean(client_name,
904
"enabled")
905
906
# Uppercase and remove spaces from key_id and fingerprint
907
# for later comparison purposes with return value from the
908
# key_id() and fingerprint() functions
909
client["key_id"] = (section.get("key_id", "").upper()
910
.replace(" ", ""))
911
client["fingerprint"] = (section["fingerprint"].upper()
912
.replace(" ", ""))
913
if "secret" in section:
914
client["secret"] = codecs.decode(section["secret"]
915
.encode("utf-8"),
916
"base64")
917
elif "secfile" in section:
918
with open(os.path.expanduser(os.path.expandvars
919
(section["secfile"])),
920
"rb") as secfile:
921
client["secret"] = secfile.read()
922
else:
923
raise TypeError("No secret or secfile for section {}"
924
.format(section))
925
client["timeout"] = string_to_delta(section["timeout"])
926
client["extended_timeout"] = string_to_delta(
927
section["extended_timeout"])
928
client["interval"] = string_to_delta(section["interval"])
929
client["approval_delay"] = string_to_delta(
930
section["approval_delay"])
931
client["approval_duration"] = string_to_delta(
932
section["approval_duration"])
933
client["checker_command"] = section["checker"]
934
client["last_approval_request"] = None
935
client["last_checked_ok"] = None
936
client["last_checker_status"] = -2
937
938
return settings
939
940
def __init__(self, settings, name=None, server_settings=None):
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
213
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
941
225
self.name = name
942
if server_settings is None:
943
server_settings = {}
944
self.server_settings = server_settings
945
# adding all client settings
946
for setting, value in settings.items():
947
setattr(self, setting, value)
948
949
if self.enabled:
950
if not hasattr(self, "last_enabled"):
951
self.last_enabled = datetime.datetime.utcnow()
952
if not hasattr(self, "expires"):
953
self.expires = (datetime.datetime.utcnow()
954
+ self.timeout)
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
232
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
955
243
else:
956
self.last_enabled = None
957
self.expires = None
958
959
logger.debug("Creating client %r", self.name)
960
logger.debug(" Key ID: %s", self.key_id)
961
logger.debug(" Fingerprint: %s", self.fingerprint)
962
self.created = settings.get("created",
963
datetime.datetime.utcnow())
964
965
# attributes specific for this server instance
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
966
254
self.checker = None
967
255
self.checker_initiator_tag = None
968
256
self.disable_initiator_tag = None
969
257
self.checker_callback_tag = None
970
self.current_checker_command = None
971
self.approved = None
972
self.approvals_pending = 0
973
self.changedstate = multiprocessing_manager.Condition(
974
multiprocessing_manager.Lock())
975
self.client_structure = [attr
976
for attr in self.__dict__.keys()
977
if not attr.startswith("_")]
978
self.client_structure.append("client_structure")
979
980
for name, t in inspect.getmembers(
981
type(self), lambda obj: isinstance(obj, property)):
982
if not name.startswith("_"):
983
self.client_structure.append(name)
984
985
# Send notice to process children that client state has changed
986
def send_changedstate(self):
987
with self.changedstate:
988
self.changedstate.notify_all()
989
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
990
270
def enable(self):
991
271
"""Start this client's checker and timeout hooks"""
992
if getattr(self, "enabled", False):
993
# Already enabled
994
return
995
self.expires = datetime.datetime.utcnow() + self.timeout
996
self.enabled = True
997
272
self.last_enabled = datetime.datetime.utcnow()
998
self.init_checker()
999
self.send_changedstate()
1000
1001
def disable(self, quiet=True):
1002
"""Disable this client."""
1003
if not getattr(self, "enabled", False):
1004
return False
1005
if not quiet:
1006
logger.info("Disabling client %s", self.name)
1007
if getattr(self, "disable_initiator_tag", None) is not None:
1008
GLib.source_remove(self.disable_initiator_tag)
1009
self.disable_initiator_tag = None
1010
self.expires = None
1011
if getattr(self, "checker_initiator_tag", None) is not None:
1012
GLib.source_remove(self.checker_initiator_tag)
1013
self.checker_initiator_tag = None
1014
self.stop_checker()
1015
self.enabled = False
1016
if not quiet:
1017
self.send_changedstate()
1018
# Do not run this again if called by a GLib.timeout_add
1019
return False
1020
1021
def __del__(self):
1022
self.disable()
1023
1024
def init_checker(self):
1025
273
# Schedule a new checker to be started an 'interval' from now,
1026
274
# and every interval from then on.
1027
if self.checker_initiator_tag is not None:
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
1031
self.start_checker)
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
1032
280
# Schedule a disable() when 'timeout' has passed
1033
if self.disable_initiator_tag is not None:
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
1037
# Also start a new checker *right now*.
1038
self.start_checker()
1039
1040
def checker_callback(self, source, condition, connection,
1041
command):
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
302
gobject.source_remove(self.checker_initiator_tag)
303
self.checker_initiator_tag = None
304
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
# Do not run this again if called by a gobject.timeout_add
313
return False
314
315
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
1042
320
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
1045
connection.close()
1046
self.checker.join()
1047
321
self.checker_callback_tag = None
1048
322
self.checker = None
1049
1050
if returncode >= 0:
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
1053
if self.last_checker_status == 0:
1054
logger.info("Checker for %(name)s succeeded",
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
1055
331
vars(self))
1056
332
self.checked_ok()
1057
333
else:
1058
logger.info("Checker for %(name)s failed", vars(self))
334
logger.info(u"Checker for %(name)s failed",
335
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
1059
341
else:
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
1062
logger.warning("Checker for %(name)s crashed?",
342
logger.warning(u"Checker for %(name)s crashed?",
1063
343
vars(self))
1064
return False
1065
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
1066
350
def checked_ok(self):
1067
"""Assert that the client has been seen, alive and well."""
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
1068
355
self.last_checked_ok = datetime.datetime.utcnow()
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
1071
self.bump_timeout()
1072
1073
def bump_timeout(self, timeout=None):
1074
"""Bump up the timeout for this client."""
1075
if timeout is None:
1076
timeout = self.timeout
1077
if self.disable_initiator_tag is not None:
1078
GLib.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1080
if getattr(self, "enabled", False):
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
1083
self.expires = datetime.datetime.utcnow() + timeout
1084
1085
def need_approval(self):
1086
self.last_approval_request = datetime.datetime.utcnow()
1087
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
1088
367
def start_checker(self):
1089
368
"""Start a new checker subprocess if one is not running.
1090
1091
369
If a checker already exists, leave it running and do
1092
370
nothing."""
1093
371
# The reason for not killing a running checker is that if we
1094
# did that, and if a checker (for some reason) started running
1095
# slowly and taking more than 'interval' time, then the client
1096
# would inevitably timeout, since no checker would get a
1097
# chance to run to completion. If we instead leave running
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
1098
376
# checkers alone, the checker would have to take more time
1099
# than 'timeout' for the client to be disabled, which is as it
1100
# should be.
1101
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
1104
self.checker.join()
1105
self.checker = None
1106
# Start a new checker if needed
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
1107
379
if self.checker is None:
1108
# Escape attributes for the shell
1109
escaped_attrs = {
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
1112
try:
1113
command = self.checker_command % escaped_attrs
1114
except TypeError as error:
1115
logger.error('Could not format string "%s"',
1116
self.checker_command,
1117
exc_info=error)
1118
return True # Try again later
1119
self.current_checker_command = command
1120
logger.info("Starting checker %r for %s", command,
1121
self.name)
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1128
# created wnull.
1129
popen_args = {"close_fds": True,
1130
"shell": True,
1131
"cwd": "/"}
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1135
"stderr": wnull})
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1138
target=call_pipe,
1139
args=(pipe[1], subprocess.call, command),
1140
kwargs=popen_args)
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
380
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
383
except TypeError:
384
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
386
for key, val in
387
vars(self).iteritems())
388
try:
389
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
393
return True # Try again later
394
try:
395
logger.info(u"Starting checker %r for %s",
396
command, self.name)
397
# We don't need to redirect stdout and stderr, since
398
# in normal mode, that is already done by daemon(),
399
# and in debug mode we don't want to. (Stdin is
400
# always replaced by /dev/null.)
401
self.checker = subprocess.Popen(command,
402
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
416
error)
417
# Re-run this periodically if run by gobject.timeout_add
1146
418
return True
1147
419
1148
420
def stop_checker(self):
1149
421
"""Force the checker process, if any, to stop."""
1150
422
if self.checker_callback_tag:
1151
GLib.source_remove(self.checker_callback_tag)
423
gobject.source_remove(self.checker_callback_tag)
1152
424
self.checker_callback_tag = None
1153
425
if getattr(self, "checker", None) is None:
1154
426
return
1155
logger.debug("Stopping checker for %(name)s", vars(self))
1156
self.checker.terminate()
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
try:
429
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
431
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
434
if error.errno != errno.ESRCH: # No such process
435
raise
1157
436
self.checker = None
1158
1159
1160
def dbus_service_property(dbus_interface,
1161
signature="v",
1162
access="readwrite",
1163
byte_arrays=False):
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
1165
become properties on the D-Bus.
1166
1167
The decorated method will be called with no arguments by "Get"
1168
and with one argument by "Set".
1169
1170
The parameters, where they are supported, are the same as
1171
dbus.service.method, except there is only "signature", since the
1172
type from Get() and the type sent to Set() is the same.
1173
"""
1174
# Encoding deeply encoded byte arrays is not supported yet by the
1175
# "Set" method, so we fail early here:
1176
if byte_arrays and signature != "ay":
1177
raise ValueError("Byte arrays not supported for non-'ay'"
1178
" signature {!r}".format(signature))
1179
1180
def decorator(func):
1181
func._dbus_is_property = True
1182
func._dbus_interface = dbus_interface
1183
func._dbus_signature = signature
1184
func._dbus_access = access
1185
func._dbus_name = func.__name__
1186
if func._dbus_name.endswith("_dbus_property"):
1187
func._dbus_name = func._dbus_name[:-14]
1188
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1189
return func
1190
1191
return decorator
1192
1193
1194
def dbus_interface_annotations(dbus_interface):
1195
"""Decorator for marking functions returning interface annotations
1196
1197
Usage:
1198
1199
@dbus_interface_annotations("org.example.Interface")
1200
def _foo(self): # Function name does not matter
1201
return {"org.freedesktop.DBus.Deprecated": "true",
1202
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1203
"false"}
1204
"""
1205
1206
def decorator(func):
1207
func._dbus_is_interface = True
1208
func._dbus_interface = dbus_interface
1209
func._dbus_name = dbus_interface
1210
return func
1211
1212
return decorator
1213
1214
1215
def dbus_annotations(annotations):
1216
"""Decorator to annotate D-Bus methods, signals or properties
1217
Usage:
1218
1219
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1220
"org.freedesktop.DBus.Property."
1221
"EmitsChangedSignal": "false"})
1222
@dbus_service_property("org.example.Interface", signature="b",
1223
access="r")
1224
def Property_dbus_property(self):
1225
return dbus.Boolean(False)
1226
1227
See also the DBusObjectWithAnnotations class.
1228
"""
1229
1230
def decorator(func):
1231
func._dbus_annotations = annotations
1232
return func
1233
1234
return decorator
1235
1236
1237
class DBusPropertyException(dbus.exceptions.DBusException):
1238
"""A base class for D-Bus property-related exceptions
1239
"""
1240
pass
1241
1242
1243
class DBusPropertyAccessException(DBusPropertyException):
1244
"""A property's access permissions disallows an operation.
1245
"""
1246
pass
1247
1248
1249
class DBusPropertyNotFound(DBusPropertyException):
1250
"""An attempt was made to access a non-existing property.
1251
"""
1252
pass
1253
1254
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1257
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
1260
"""
1261
1262
@staticmethod
1263
def _is_dbus_thing(thing):
1264
"""Returns a function testing if an attribute is a D-Bus thing
1265
1266
If called like _is_dbus_thing("method") it returns a function
1267
suitable for use as predicate to inspect.getmembers().
1268
"""
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1270
False)
1271
1272
def _get_all_dbus_things(self, thing):
1273
"""Returns a generator of (name, attribute) pairs
1274
"""
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
1276
athing.__get__(self))
1277
for cls in self.__class__.__mro__
1278
for name, athing in
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1280
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1282
out_signature="s",
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1287
1288
Inserts annotation tags on methods and signals.
1289
"""
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1291
connection)
1292
try:
1293
document = xml.dom.minidom.parseString(xmlstring)
1294
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1299
annots = dict()
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1309
"annotation")
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1320
)).items():
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1332
== "out"):
1333
arg.setAttribute("name",
1334
"xml_data")
1335
xmlstring = document.toxml("utf-8")
1336
document.unlink()
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1340
exc_info=error)
1341
return xmlstring
1342
1343
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1345
"""A D-Bus object with properties.
1346
1347
Classes inheriting from this can use the dbus_service_property
1348
decorator to expose methods as D-Bus properties. It exposes the
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
1350
"""
1351
1352
def _get_dbus_property(self, interface_name, property_name):
1353
"""Returns a bound method if one exists which is a D-Bus
1354
property with the specified name and interface.
1355
"""
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
1359
if (value._dbus_name == property_name
1360
and value._dbus_interface == interface_name):
1361
return value.__get__(self)
1362
1363
# No such property
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1366
1367
@classmethod
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1373
for attr in dir(x))
1374
if name is not None)
1375
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
1377
in_signature="ss",
1378
out_signature="v")
1379
def Get(self, interface_name, property_name):
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
1381
"""
1382
prop = self._get_dbus_property(interface_name, property_name)
1383
if prop._dbus_access == "write":
1384
raise DBusPropertyAccessException(property_name)
1385
value = prop()
1386
if not hasattr(value, "variant_level"):
1387
return value
1388
return type(value)(value, variant_level=value.variant_level+1)
1389
1390
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1391
def Set(self, interface_name, property_name, value):
1392
"""Standard D-Bus property Set() method, see D-Bus standard.
1393
"""
1394
prop = self._get_dbus_property(interface_name, property_name)
1395
if prop._dbus_access == "read":
1396
raise DBusPropertyAccessException(property_name)
1397
if prop._dbus_get_args_options["byte_arrays"]:
1398
# The byte_arrays option is not supported yet on
1399
# signatures other than "ay".
1400
if prop._dbus_signature != "ay":
1401
raise ValueError("Byte arrays not supported for non-"
1402
"'ay' signature {!r}"
1403
.format(prop._dbus_signature))
1404
value = dbus.ByteArray(b''.join(chr(byte)
1405
for byte in value))
1406
prop(value)
1407
1408
@dbus.service.method(dbus.PROPERTIES_IFACE,
1409
in_signature="s",
1410
out_signature="a{sv}")
1411
def GetAll(self, interface_name):
1412
"""Standard D-Bus property GetAll() method, see D-Bus
1413
standard.
1414
1415
Note: Will not include properties with access="write".
1416
"""
1417
properties = {}
1418
for name, prop in self._get_all_dbus_things("property"):
1419
if (interface_name
1420
and interface_name != prop._dbus_interface):
1421
# Interface non-empty but did not match
1422
continue
1423
# Ignore write-only properties
1424
if prop._dbus_access == "write":
1425
continue
1426
value = prop()
1427
if not hasattr(value, "variant_level"):
1428
properties[name] = value
1429
continue
1430
properties[name] = type(value)(
1431
value, variant_level=value.variant_level + 1)
1432
return dbus.Dictionary(properties, signature="sv")
1433
1434
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1435
def PropertiesChanged(self, interface_name, changed_properties,
1436
invalidated_properties):
1437
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1438
standard.
1439
"""
1440
pass
1441
1442
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1443
out_signature="s",
1444
path_keyword='object_path',
1445
connection_keyword='connection')
1446
def Introspect(self, object_path, connection):
1447
"""Overloading of standard D-Bus method.
1448
1449
Inserts property tags and interface annotation tags.
1450
"""
1451
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1452
object_path,
1453
connection)
1454
try:
1455
document = xml.dom.minidom.parseString(xmlstring)
1456
1457
def make_tag(document, name, prop):
1458
e = document.createElement("property")
1459
e.setAttribute("name", name)
1460
e.setAttribute("type", prop._dbus_signature)
1461
e.setAttribute("access", prop._dbus_access)
1462
return e
1463
1464
for if_tag in document.getElementsByTagName("interface"):
1465
# Add property tags
1466
for tag in (make_tag(document, name, prop)
1467
for name, prop
1468
in self._get_all_dbus_things("property")
1469
if prop._dbus_interface
1470
== if_tag.getAttribute("name")):
1471
if_tag.appendChild(tag)
1472
# Add annotation tags for properties
1473
for tag in if_tag.getElementsByTagName("property"):
1474
annots = dict()
1475
for name, prop in self._get_all_dbus_things(
1476
"property"):
1477
if (name == tag.getAttribute("name")
1478
and prop._dbus_interface
1479
== if_tag.getAttribute("name")):
1480
annots.update(getattr(
1481
prop, "_dbus_annotations", {}))
1482
for name, value in annots.items():
1483
ann_tag = document.createElement(
1484
"annotation")
1485
ann_tag.setAttribute("name", name)
1486
ann_tag.setAttribute("value", value)
1487
tag.appendChild(ann_tag)
1488
# Add the names to the return values for the
1489
# "org.freedesktop.DBus.Properties" methods
1490
if (if_tag.getAttribute("name")
1491
== "org.freedesktop.DBus.Properties"):
1492
for cn in if_tag.getElementsByTagName("method"):
1493
if cn.getAttribute("name") == "Get":
1494
for arg in cn.getElementsByTagName("arg"):
1495
if (arg.getAttribute("direction")
1496
== "out"):
1497
arg.setAttribute("name", "value")
1498
elif cn.getAttribute("name") == "GetAll":
1499
for arg in cn.getElementsByTagName("arg"):
1500
if (arg.getAttribute("direction")
1501
== "out"):
1502
arg.setAttribute("name", "props")
1503
xmlstring = document.toxml("utf-8")
1504
document.unlink()
1505
except (AttributeError, xml.dom.DOMException,
1506
xml.parsers.expat.ExpatError) as error:
1507
logger.error("Failed to override Introspection method",
1508
exc_info=error)
1509
return xmlstring
1510
1511
1512
try:
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1516
1517
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1520
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1525
1526
Note: No signals are sent automatically; they must be sent
1527
manually.
1528
"""
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1538
pass
1539
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1542
pass
1543
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1545
out_signature="s",
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1550
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1553
"""
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1555
object_path,
1556
connection)
1557
try:
1558
document = xml.dom.minidom.parseString(xmlstring)
1559
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1569
== "out"):
1570
arg.setAttribute(
1571
"name",
1572
"objpath_interfaces"
1573
"_and_properties")
1574
xmlstring = document.toxml("utf-8")
1575
document.unlink()
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1579
exc_info=error)
1580
return xmlstring
1581
1582
1583
def datetime_to_dbus(dt, variant_level=0):
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1585
if dt is None:
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1588
1589
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1591
"""A class decorator; applied to a subclass of
1592
dbus.service.Object, it will add alternate D-Bus attributes with
1593
interface names according to the "alt_interface_names" mapping.
1594
Usage:
1595
1596
@alternate_dbus_interfaces({"org.example.Interface":
1597
"net.example.AlternateInterface"})
1598
class SampleDBusObject(dbus.service.Object):
1599
@dbus.service.method("org.example.Interface")
1600
def SampleDBusMethod():
1601
pass
1602
1603
The above "SampleDBusMethod" on "SampleDBusObject" will be
1604
reachable via two interfaces: "org.example.Interface" and
1605
"net.example.AlternateInterface", the latter of which will have
1606
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1607
"true", unless "deprecate" is passed with a False value.
1608
1609
This works for methods and signals, and also for D-Bus properties
1610
(from DBusObjectWithProperties) and interfaces (from the
1611
dbus_interface_annotations decorator).
1612
"""
1613
1614
def wrapper(cls):
1615
for orig_interface_name, alt_interface_name in (
1616
alt_interface_names.items()):
1617
attr = {}
1618
interface_names = set()
1619
# Go though all attributes of the class
1620
for attrname, attribute in inspect.getmembers(cls):
1621
# Ignore non-D-Bus attributes, and D-Bus attributes
1622
# with the wrong interface name
1623
if (not hasattr(attribute, "_dbus_interface")
1624
or not attribute._dbus_interface.startswith(
1625
orig_interface_name)):
1626
continue
1627
# Create an alternate D-Bus interface name based on
1628
# the current name
1629
alt_interface = attribute._dbus_interface.replace(
1630
orig_interface_name, alt_interface_name)
1631
interface_names.add(alt_interface)
1632
# Is this a D-Bus signal?
1633
if getattr(attribute, "_dbus_is_signal", False):
1634
# Extract the original non-method undecorated
1635
# function by black magic
1636
if sys.version_info.major == 2:
1637
nonmethod_func = (dict(
1638
zip(attribute.func_code.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
else:
1642
nonmethod_func = (dict(
1643
zip(attribute.__code__.co_freevars,
1644
attribute.__closure__))
1645
["func"].cell_contents)
1646
# Create a new, but exactly alike, function
1647
# object, and decorate it to be a new D-Bus signal
1648
# with the alternate D-Bus interface name
1649
new_function = copy_function(nonmethod_func)
1650
new_function = (dbus.service.signal(
1651
alt_interface,
1652
attribute._dbus_signature)(new_function))
1653
# Copy annotations, if any
1654
try:
1655
new_function._dbus_annotations = dict(
1656
attribute._dbus_annotations)
1657
except AttributeError:
1658
pass
1659
1660
# Define a creator of a function to call both the
1661
# original and alternate functions, so both the
1662
# original and alternate signals gets sent when
1663
# the function is called
1664
def fixscope(func1, func2):
1665
"""This function is a scope container to pass
1666
func1 and func2 to the "call_both" function
1667
outside of its arguments"""
1668
1669
@functools.wraps(func2)
1670
def call_both(*args, **kwargs):
1671
"""This function will emit two D-Bus
1672
signals by calling func1 and func2"""
1673
func1(*args, **kwargs)
1674
func2(*args, **kwargs)
1675
# Make wrapper function look like a D-Bus
1676
# signal
1677
for name, attr in inspect.getmembers(func2):
1678
if name.startswith("_dbus_"):
1679
setattr(call_both, name, attr)
1680
1681
return call_both
1682
# Create the "call_both" function and add it to
1683
# the class
1684
attr[attrname] = fixscope(attribute, new_function)
1685
# Is this a D-Bus method?
1686
elif getattr(attribute, "_dbus_is_method", False):
1687
# Create a new, but exactly alike, function
1688
# object. Decorate it to be a new D-Bus method
1689
# with the alternate D-Bus interface name. Add it
1690
# to the class.
1691
attr[attrname] = (
1692
dbus.service.method(
1693
alt_interface,
1694
attribute._dbus_in_signature,
1695
attribute._dbus_out_signature)
1696
(copy_function(attribute)))
1697
# Copy annotations, if any
1698
try:
1699
attr[attrname]._dbus_annotations = dict(
1700
attribute._dbus_annotations)
1701
except AttributeError:
1702
pass
1703
# Is this a D-Bus property?
1704
elif getattr(attribute, "_dbus_is_property", False):
1705
# Create a new, but exactly alike, function
1706
# object, and decorate it to be a new D-Bus
1707
# property with the alternate D-Bus interface
1708
# name. Add it to the class.
1709
attr[attrname] = (dbus_service_property(
1710
alt_interface, attribute._dbus_signature,
1711
attribute._dbus_access,
1712
attribute._dbus_get_args_options
1713
["byte_arrays"])
1714
(copy_function(attribute)))
1715
# Copy annotations, if any
1716
try:
1717
attr[attrname]._dbus_annotations = dict(
1718
attribute._dbus_annotations)
1719
except AttributeError:
1720
pass
1721
# Is this a D-Bus interface?
1722
elif getattr(attribute, "_dbus_is_interface", False):
1723
# Create a new, but exactly alike, function
1724
# object. Decorate it to be a new D-Bus interface
1725
# with the alternate D-Bus interface name. Add it
1726
# to the class.
1727
attr[attrname] = (
1728
dbus_interface_annotations(alt_interface)
1729
(copy_function(attribute)))
1730
if deprecate:
1731
# Deprecate all alternate interfaces
1732
iname = "_AlternateDBusNames_interface_annotation{}"
1733
for interface_name in interface_names:
1734
1735
@dbus_interface_annotations(interface_name)
1736
def func(self):
1737
return {"org.freedesktop.DBus.Deprecated":
1738
"true"}
1739
# Find an unused name
1740
for aname in (iname.format(i)
1741
for i in itertools.count()):
1742
if aname not in attr:
1743
attr[aname] = func
1744
break
1745
if interface_names:
1746
# Replace the class with a new subclass of it with
1747
# methods, signals, etc. as created above.
1748
if sys.version_info.major == 2:
1749
cls = type(b"{}Alternate".format(cls.__name__),
1750
(cls, ), attr)
1751
else:
1752
cls = type("{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
return cls
1755
1756
return wrapper
1757
1758
1759
@alternate_dbus_interfaces({"se.recompile.Mandos":
1760
"se.bsnet.fukt.Mandos"})
1761
class ClientDBus(Client, DBusObjectWithProperties):
1762
"""A Client class using D-Bus
1763
1764
Attributes:
1765
dbus_object_path: dbus.ObjectPath
1766
bus: dbus.SystemBus()
1767
"""
1768
1769
runtime_expansions = (Client.runtime_expansions
1770
+ ("dbus_object_path", ))
1771
1772
_interface = "se.recompile.Mandos.Client"
1773
1774
# dbus.service.Object doesn't use super(), so we can't either.
1775
1776
def __init__(self, bus=None, *args, **kwargs):
1777
self.bus = bus
1778
Client.__init__(self, *args, **kwargs)
1779
# Only now, when this client is initialized, can it show up on
1780
# the D-Bus
1781
client_object_name = str(self.name).translate(
1782
{ord("."): ord("_"),
1783
ord("-"): ord("_")})
1784
self.dbus_object_path = dbus.ObjectPath(
1785
"/clients/" + client_object_name)
1786
DBusObjectWithProperties.__init__(self, self.bus,
1787
self.dbus_object_path)
1788
1789
def notifychangeproperty(transform_func, dbus_name,
1790
type_func=lambda x: x,
1791
variant_level=1,
1792
invalidate_only=False,
1793
_interface=_interface):
1794
""" Modify a variable so that it's a property which announces
1795
its changes to DBus.
1796
1797
transform_fun: Function that takes a value and a variant_level
1798
and transforms it to a D-Bus type.
1799
dbus_name: D-Bus name of the variable
1800
type_func: Function that transform the value before sending it
1801
to the D-Bus. Default: no transform
1802
variant_level: D-Bus variant level. Default: 1
1803
"""
1804
attrname = "_{}".format(dbus_name)
1805
1806
def setter(self, value):
1807
if hasattr(self, "dbus_object_path"):
1808
if (not hasattr(self, attrname) or
1809
type_func(getattr(self, attrname, None))
1810
!= type_func(value)):
1811
if invalidate_only:
1812
self.PropertiesChanged(
1813
_interface, dbus.Dictionary(),
1814
dbus.Array((dbus_name, )))
1815
else:
1816
dbus_value = transform_func(
1817
type_func(value),
1818
variant_level=variant_level)
1819
self.PropertyChanged(dbus.String(dbus_name),
1820
dbus_value)
1821
self.PropertiesChanged(
1822
_interface,
1823
dbus.Dictionary({dbus.String(dbus_name):
1824
dbus_value}),
1825
dbus.Array())
1826
setattr(self, attrname, value)
1827
1828
return property(lambda self: getattr(self, attrname), setter)
1829
1830
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1831
approvals_pending = notifychangeproperty(dbus.Boolean,
1832
"ApprovalPending",
1833
type_func=bool)
1834
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1835
last_enabled = notifychangeproperty(datetime_to_dbus,
1836
"LastEnabled")
1837
checker = notifychangeproperty(
1838
dbus.Boolean, "CheckerRunning",
1839
type_func=lambda checker: checker is not None)
1840
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1841
"LastCheckedOK")
1842
last_checker_status = notifychangeproperty(dbus.Int16,
1843
"LastCheckerStatus")
1844
last_approval_request = notifychangeproperty(
1845
datetime_to_dbus, "LastApprovalRequest")
1846
approved_by_default = notifychangeproperty(dbus.Boolean,
1847
"ApprovedByDefault")
1848
approval_delay = notifychangeproperty(
1849
dbus.UInt64, "ApprovalDelay",
1850
type_func=lambda td: td.total_seconds() * 1000)
1851
approval_duration = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDuration",
1853
type_func=lambda td: td.total_seconds() * 1000)
1854
host = notifychangeproperty(dbus.String, "Host")
1855
timeout = notifychangeproperty(
1856
dbus.UInt64, "Timeout",
1857
type_func=lambda td: td.total_seconds() * 1000)
1858
extended_timeout = notifychangeproperty(
1859
dbus.UInt64, "ExtendedTimeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
1861
interval = notifychangeproperty(
1862
dbus.UInt64, "Interval",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
checker_command = notifychangeproperty(dbus.String, "Checker")
1865
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1866
invalidate_only=True)
1867
1868
del notifychangeproperty
1869
1870
def __del__(self, *args, **kwargs):
1871
try:
1872
self.remove_from_connection()
1873
except LookupError:
1874
pass
1875
if hasattr(DBusObjectWithProperties, "__del__"):
1876
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1877
Client.__del__(self, *args, **kwargs)
1878
1879
def checker_callback(self, source, condition,
1880
connection, command, *args, **kwargs):
1881
ret = Client.checker_callback(self, source, condition,
1882
connection, command, *args,
1883
**kwargs)
1884
exitstatus = self.last_checker_status
1885
if exitstatus >= 0:
1886
# Emit D-Bus signal
1887
self.CheckerCompleted(dbus.Int16(exitstatus),
1888
# This is specific to GNU libC
1889
dbus.Int64(exitstatus << 8),
1890
dbus.String(command))
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
1891
448
else:
1892
# Emit D-Bus signal
1893
self.CheckerCompleted(dbus.Int16(-1),
1894
dbus.Int64(
1895
# This is specific to GNU libC
1896
(exitstatus << 8)
1897
| self.last_checker_signal),
1898
dbus.String(command))
1899
return ret
1900
1901
def start_checker(self, *args, **kwargs):
1902
old_checker_pid = getattr(self.checker, "pid", None)
1903
r = Client.start_checker(self, *args, **kwargs)
1904
# Only if new checker process was started
1905
if (self.checker is not None
1906
and old_checker_pid != self.checker.pid):
1907
# Emit D-Bus signal
1908
self.CheckerStarted(self.current_checker_command)
1909
return r
1910
1911
def _reset_approved(self):
1912
self.approved = None
1913
return False
1914
1915
def approve(self, value=True):
1916
self.approved = value
1917
GLib.timeout_add(int(self.approval_duration.total_seconds()
1918
* 1000), self._reset_approved)
1919
self.send_changedstate()
1920
1921
# D-Bus methods, signals & properties
1922
1923
# Interfaces
1924
1925
# Signals
1926
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
457
1927
458
# CheckerCompleted - signal
1928
459
@dbus.service.signal(_interface, signature="nxs")
1929
460
def CheckerCompleted(self, exitcode, waitstatus, command):
1930
461
"D-Bus signal"
1931
462
pass
1932
463
1933
464
# CheckerStarted - signal
1934
465
@dbus.service.signal(_interface, signature="s")
1935
466
def CheckerStarted(self, command):
1936
467
"D-Bus signal"
1937
468
pass
1938
469
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
1939
517
# PropertyChanged - signal
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
518
@dbus.service.signal(_interface, signature="sv")
1942
519
def PropertyChanged(self, property, value):
1943
520
"D-Bus signal"
1944
521
pass
1945
1946
# GotSecret - signal
1947
@dbus.service.signal(_interface)
1948
def GotSecret(self):
1949
"""D-Bus signal
1950
Is sent after a successful transfer of secret from the Mandos
1951
server to mandos-client
1952
"""
1953
pass
1954
1955
# Rejected - signal
1956
@dbus.service.signal(_interface, signature="s")
1957
def Rejected(self, reason):
1958
"D-Bus signal"
1959
pass
1960
1961
# NeedApproval - signal
1962
@dbus.service.signal(_interface, signature="tb")
1963
def NeedApproval(self, timeout, default):
1964
"D-Bus signal"
1965
return self.need_approval()
1966
1967
# Methods
1968
1969
# Approve - method
1970
@dbus.service.method(_interface, in_signature="b")
1971
def Approve(self, value):
1972
self.approve(value)
1973
1974
# CheckedOK - method
1975
@dbus.service.method(_interface)
1976
def CheckedOK(self):
1977
self.checked_ok()
1978
522
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
566
1979
567
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1981
@dbus.service.method(_interface)
1982
def Enable(self):
1983
"D-Bus method"
1984
self.enable()
1985
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
570
1986
571
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1988
572
@dbus.service.method(_interface)
1989
573
def StartChecker(self):
1990
574
"D-Bus method"
1991
575
self.start_checker()
1992
576
1993
577
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1995
578
@dbus.service.method(_interface)
1996
579
def Disable(self):
1997
580
"D-Bus method"
1998
581
self.disable()
1999
582
2000
583
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2002
@dbus.service.method(_interface)
2003
def StopChecker(self):
2004
self.stop_checker()
2005
2006
# Properties
2007
2008
# ApprovalPending - property
2009
@dbus_service_property(_interface, signature="b", access="read")
2010
def ApprovalPending_dbus_property(self):
2011
return dbus.Boolean(bool(self.approvals_pending))
2012
2013
# ApprovedByDefault - property
2014
@dbus_service_property(_interface,
2015
signature="b",
2016
access="readwrite")
2017
def ApprovedByDefault_dbus_property(self, value=None):
2018
if value is None: # get
2019
return dbus.Boolean(self.approved_by_default)
2020
self.approved_by_default = bool(value)
2021
2022
# ApprovalDelay - property
2023
@dbus_service_property(_interface,
2024
signature="t",
2025
access="readwrite")
2026
def ApprovalDelay_dbus_property(self, value=None):
2027
if value is None: # get
2028
return dbus.UInt64(self.approval_delay.total_seconds()
2029
* 1000)
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2031
2032
# ApprovalDuration - property
2033
@dbus_service_property(_interface,
2034
signature="t",
2035
access="readwrite")
2036
def ApprovalDuration_dbus_property(self, value=None):
2037
if value is None: # get
2038
return dbus.UInt64(self.approval_duration.total_seconds()
2039
* 1000)
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2041
2042
# Name - property
2043
@dbus_annotations(
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2045
@dbus_service_property(_interface, signature="s", access="read")
2046
def Name_dbus_property(self):
2047
return dbus.String(self.name)
2048
2049
# KeyID - property
2050
@dbus_annotations(
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
2055
2056
# Fingerprint - property
2057
@dbus_annotations(
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2059
@dbus_service_property(_interface, signature="s", access="read")
2060
def Fingerprint_dbus_property(self):
2061
return dbus.String(self.fingerprint)
2062
2063
# Host - property
2064
@dbus_service_property(_interface,
2065
signature="s",
2066
access="readwrite")
2067
def Host_dbus_property(self, value=None):
2068
if value is None: # get
2069
return dbus.String(self.host)
2070
self.host = str(value)
2071
2072
# Created - property
2073
@dbus_annotations(
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2075
@dbus_service_property(_interface, signature="s", access="read")
2076
def Created_dbus_property(self):
2077
return datetime_to_dbus(self.created)
2078
2079
# LastEnabled - property
2080
@dbus_service_property(_interface, signature="s", access="read")
2081
def LastEnabled_dbus_property(self):
2082
return datetime_to_dbus(self.last_enabled)
2083
2084
# Enabled - property
2085
@dbus_service_property(_interface,
2086
signature="b",
2087
access="readwrite")
2088
def Enabled_dbus_property(self, value=None):
2089
if value is None: # get
2090
return dbus.Boolean(self.enabled)
2091
if value:
2092
self.enable()
2093
else:
2094
self.disable()
2095
2096
# LastCheckedOK - property
2097
@dbus_service_property(_interface,
2098
signature="s",
2099
access="readwrite")
2100
def LastCheckedOK_dbus_property(self, value=None):
2101
if value is not None:
2102
self.checked_ok()
2103
return
2104
return datetime_to_dbus(self.last_checked_ok)
2105
2106
# LastCheckerStatus - property
2107
@dbus_service_property(_interface, signature="n", access="read")
2108
def LastCheckerStatus_dbus_property(self):
2109
return dbus.Int16(self.last_checker_status)
2110
2111
# Expires - property
2112
@dbus_service_property(_interface, signature="s", access="read")
2113
def Expires_dbus_property(self):
2114
return datetime_to_dbus(self.expires)
2115
2116
# LastApprovalRequest - property
2117
@dbus_service_property(_interface, signature="s", access="read")
2118
def LastApprovalRequest_dbus_property(self):
2119
return datetime_to_dbus(self.last_approval_request)
2120
2121
# Timeout - property
2122
@dbus_service_property(_interface,
2123
signature="t",
2124
access="readwrite")
2125
def Timeout_dbus_property(self, value=None):
2126
if value is None: # get
2127
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2128
old_timeout = self.timeout
2129
self.timeout = datetime.timedelta(0, 0, 0, value)
2130
# Reschedule disabling
2131
if self.enabled:
2132
now = datetime.datetime.utcnow()
2133
self.expires += self.timeout - old_timeout
2134
if self.expires <= now:
2135
# The timeout has passed
2136
self.disable()
2137
else:
2138
if (getattr(self, "disable_initiator_tag", None)
2139
is None):
2140
return
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
2144
self.disable)
2145
2146
# ExtendedTimeout - property
2147
@dbus_service_property(_interface,
2148
signature="t",
2149
access="readwrite")
2150
def ExtendedTimeout_dbus_property(self, value=None):
2151
if value is None: # get
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
2153
* 1000)
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2155
2156
# Interval - property
2157
@dbus_service_property(_interface,
2158
signature="t",
2159
access="readwrite")
2160
def Interval_dbus_property(self, value=None):
2161
if value is None: # get
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
2163
self.interval = datetime.timedelta(0, 0, 0, value)
2164
if getattr(self, "checker_initiator_tag", None) is None:
2165
return
2166
if self.enabled:
2167
# Reschedule checker run
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
2172
2173
# Checker - property
2174
@dbus_service_property(_interface,
2175
signature="s",
2176
access="readwrite")
2177
def Checker_dbus_property(self, value=None):
2178
if value is None: # get
2179
return dbus.String(self.checker_command)
2180
self.checker_command = str(value)
2181
2182
# CheckerRunning - property
2183
@dbus_service_property(_interface,
2184
signature="b",
2185
access="readwrite")
2186
def CheckerRunning_dbus_property(self, value=None):
2187
if value is None: # get
2188
return dbus.Boolean(self.checker is not None)
2189
if value:
2190
self.start_checker()
2191
else:
2192
self.stop_checker()
2193
2194
# ObjectPath - property
2195
@dbus_annotations(
2196
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2197
"org.freedesktop.DBus.Deprecated": "true"})
2198
@dbus_service_property(_interface, signature="o", access="read")
2199
def ObjectPath_dbus_property(self):
2200
return self.dbus_object_path # is already a dbus.ObjectPath
2201
2202
# Secret = property
2203
@dbus_annotations(
2204
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2205
"invalidates"})
2206
@dbus_service_property(_interface,
2207
signature="ay",
2208
access="write",
2209
byte_arrays=True)
2210
def Secret_dbus_property(self, value):
2211
self.secret = bytes(value)
2212
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
586
2213
587
del _interface
2214
588
2215
589
2216
class ProxyClient(object):
2217
def __init__(self, child_pipe, key_id, fpr, address):
2218
self._pipe = child_pipe
2219
self._pipe.send(('init', key_id, fpr, address))
2220
if not self._pipe.recv():
2221
raise KeyError(key_id or fpr)
2222
2223
def __getattribute__(self, name):
2224
if name == '_pipe':
2225
return super(ProxyClient, self).__getattribute__(name)
2226
self._pipe.send(('getattr', name))
2227
data = self._pipe.recv()
2228
if data[0] == 'data':
2229
return data[1]
2230
if data[0] == 'function':
2231
2232
def func(*args, **kwargs):
2233
self._pipe.send(('funcall', name, args, kwargs))
2234
return self._pipe.recv()[1]
2235
2236
return func
2237
2238
def __setattr__(self, name, value):
2239
if name == '_pipe':
2240
return super(ProxyClient, self).__setattr__(name, value)
2241
self._pipe.send(('setattr', name, value))
2242
2243
2244
class ClientHandler(socketserver.BaseRequestHandler, object):
2245
"""A class to handle client connections.
2246
2247
Instantiated once for each connection to handle it.
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
2248
654
Note: This will run in its own forked process."""
2249
655
2250
656
def handle(self):
2251
with contextlib.closing(self.server.child_pipe) as child_pipe:
2252
logger.info("TCP connection from: %s",
2253
str(self.client_address))
2254
logger.debug("Pipe FD: %d",
2255
self.server.child_pipe.fileno())
2256
2257
session = gnutls.ClientSession(self.request)
2258
2259
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2260
# "+AES-256-CBC", "+SHA1",
2261
# "+COMP-NULL", "+CTYPE-OPENPGP",
2262
# "+DHE-DSS"))
2263
# Use a fallback default, since this MUST be set.
2264
priority = self.server.gnutls_priority
2265
if priority is None:
2266
priority = "NORMAL"
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
2269
None)
2270
2271
# Start communication using the Mandos protocol
2272
# Get protocol number
2273
line = self.request.makefile().readline()
2274
logger.debug("Protocol version: %r", line)
2275
try:
2276
if int(line.strip().split()[0]) > 1:
2277
raise RuntimeError(line)
2278
except (ValueError, IndexError, RuntimeError) as error:
2279
logger.error("Unknown protocol version: %s", error)
2280
return
2281
2282
# Start GnuTLS connection
2283
try:
2284
session.handshake()
2285
except gnutls.Error as error:
2286
logger.warning("Handshake failed: %s", error)
2287
# Do not run session.bye() here: the session is not
2288
# established. Just abandon the request.
2289
return
2290
logger.debug("Handshake succeeded")
2291
2292
approval_required = False
2293
try:
2294
if gnutls.has_rawpk:
2295
fpr = b""
2296
try:
2297
key_id = self.key_id(
2298
self.peer_certificate(session))
2299
except (TypeError, gnutls.Error) as error:
2300
logger.warning("Bad certificate: %s", error)
2301
return
2302
logger.debug("Key ID: %s", key_id)
2303
2304
else:
2305
key_id = b""
2306
try:
2307
fpr = self.fingerprint(
2308
self.peer_certificate(session))
2309
except (TypeError, gnutls.Error) as error:
2310
logger.warning("Bad certificate: %s", error)
2311
return
2312
logger.debug("Fingerprint: %s", fpr)
2313
2314
try:
2315
client = ProxyClient(child_pipe, key_id, fpr,
2316
self.client_address)
2317
except KeyError:
2318
return
2319
2320
if client.approval_delay:
2321
delay = client.approval_delay
2322
client.approvals_pending += 1
2323
approval_required = True
2324
2325
while True:
2326
if not client.enabled:
2327
logger.info("Client %s is disabled",
2328
client.name)
2329
if self.server.use_dbus:
2330
# Emit D-Bus signal
2331
client.Rejected("Disabled")
2332
return
2333
2334
if client.approved or not client.approval_delay:
2335
# We are approved or approval is disabled
2336
break
2337
elif client.approved is None:
2338
logger.info("Client %s needs approval",
2339
client.name)
2340
if self.server.use_dbus:
2341
# Emit D-Bus signal
2342
client.NeedApproval(
2343
client.approval_delay.total_seconds()
2344
* 1000, client.approved_by_default)
2345
else:
2346
logger.warning("Client %s was not approved",
2347
client.name)
2348
if self.server.use_dbus:
2349
# Emit D-Bus signal
2350
client.Rejected("Denied")
2351
return
2352
2353
# wait until timeout or approved
2354
time = datetime.datetime.now()
2355
client.changedstate.acquire()
2356
client.changedstate.wait(delay.total_seconds())
2357
client.changedstate.release()
2358
time2 = datetime.datetime.now()
2359
if (time2 - time) >= delay:
2360
if not client.approved_by_default:
2361
logger.warning("Client %s timed out while"
2362
" waiting for approval",
2363
client.name)
2364
if self.server.use_dbus:
2365
# Emit D-Bus signal
2366
client.Rejected("Approval timed out")
2367
return
2368
else:
2369
break
2370
else:
2371
delay -= time2 - time
2372
2373
try:
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
2377
exc_info=error)
2378
return
2379
2380
logger.info("Sending secret to %s", client.name)
2381
# bump the timeout using extended_timeout
2382
client.bump_timeout(client.extended_timeout)
2383
if self.server.use_dbus:
2384
# Emit D-Bus signal
2385
client.GotSecret()
2386
2387
finally:
2388
if approval_required:
2389
client.approvals_pending -= 1
2390
try:
2391
session.bye()
2392
except gnutls.Error as error:
2393
logger.warning("GnuTLS bye failed",
2394
exc_info=error)
2395
2396
@staticmethod
2397
def peer_certificate(session):
2398
"Return the peer's certificate as a bytestring"
2399
try:
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2401
gnutls.CTYPE_PEERS)
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
703
for c in self.server.clients:
704
if c.fingerprint == fpr:
705
client = c
706
break
2406
707
else:
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2411
valid_cert_types)
2412
# ...return invalid data
2413
return b""
2414
list_size = ctypes.c_uint(1)
2415
cert_list = (gnutls.certificate_get_peers
2416
(session._c_object, ctypes.byref(list_size)))
2417
if not bool(cert_list) and list_size.value != 0:
2418
raise gnutls.Error("error getting peer certificate")
2419
if list_size.value == 0:
2420
return None
2421
cert = cert_list[0]
2422
return ctypes.string_at(cert.data, cert.size)
2423
2424
@staticmethod
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2451
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
2456
return hex_key_id
2457
2458
@staticmethod
2459
def fingerprint(openpgp):
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2461
# New GnuTLS "datum" with the OpenPGP public key
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
2466
# New empty GnuTLS certificate
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
2469
# Import the OpenPGP public key into the certificate
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
2472
# Verify the self signature in the key
2473
crtverify = ctypes.c_uint()
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
2476
if crtverify.value != 0:
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
2479
=crtverify.value)
2480
# New buffer for the fingerprint
2481
buf = ctypes.create_string_buffer(20)
2482
buf_len = ctypes.c_size_t()
2483
# Get the fingerprint from the certificate into the buffer
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
2486
# Deinit the certificate
2487
gnutls.openpgp_crt_deinit(crt)
2488
# Convert the buffer to a Python bytestring
2489
fpr = ctypes.string_at(buf, buf_len.value)
2490
# Convert the bytestring to hexadecimal notation
2491
hex_fpr = binascii.hexlify(fpr).upper()
2492
return hex_fpr
2493
2494
2495
class MultiprocessingMixIn(object):
2496
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2497
2498
def sub_process_main(self, request, address):
2499
try:
2500
self.finish_request(request, address)
2501
except Exception:
2502
self.handle_error(request, address)
2503
self.close_request(request)
2504
2505
def process_request(self, request, address):
2506
"""Start a new process to process the request."""
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
2509
proc.start()
2510
return proc
2511
2512
2513
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2514
""" adds a pipe to the MixIn """
2515
2516
def process_request(self, request, client_address):
2517
"""Overrides and wraps the original process_request().
2518
2519
This function creates a new pipe in self.pipe
2520
"""
2521
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2522
2523
proc = MultiprocessingMixIn.process_request(self, request,
2524
client_address)
2525
self.child_pipe.close()
2526
self.add_pipe(parent_pipe, proc)
2527
2528
def add_pipe(self, parent_pipe, proc):
2529
"""Dummy function; override as necessary"""
2530
raise NotImplementedError()
2531
2532
2533
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2534
socketserver.TCPServer, object):
2535
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2536
708
logger.warning(u"Client not found for fingerprint: %s",
709
fpr)
710
session.bye()
711
return
712
# Have to check if client.still_valid(), since it is possible
713
# that the client timed out while establishing the GnuTLS
714
# session.
715
if not client.still_valid():
716
logger.warning(u"Client %(name)s is invalid",
717
vars(client))
718
session.bye()
719
return
720
## This won't work here, since we're in a fork.
721
# client.checked_ok()
722
sent_size = 0
723
while sent_size < len(client.secret):
724
sent = session.send(client.secret[sent_size:])
725
logger.debug(u"Sent: %d, remaining: %d",
726
sent, len(client.secret)
727
- (sent_size + sent))
728
sent_size += sent
729
session.bye()
730
731
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
SocketServer.TCPServer, object):
734
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2537
735
Attributes:
736
settings: Server settings
737
clients: Set() of Client objects
2538
738
enabled: Boolean; whether this server is activated yet
2539
interface: None or a network interface name (string)
2540
use_ipv6: Boolean; to use IPv6 or not
2541
739
"""
2542
2543
def __init__(self, server_address, RequestHandlerClass,
2544
interface=None,
2545
use_ipv6=True,
2546
socketfd=None):
2547
"""If socketfd is set, use that file descriptor instead of
2548
creating a new one with socket.socket().
2549
"""
2550
self.interface = interface
2551
if use_ipv6:
2552
self.address_family = socket.AF_INET6
2553
if socketfd is not None:
2554
# Save the file descriptor
2555
self.socketfd = socketfd
2556
# Save the original socket.socket() function
2557
self.socket_socket = socket.socket
2558
2559
# To implement --socket, we monkey patch socket.socket.
2560
#
2561
# (When socketserver.TCPServer is a new-style class, we
2562
# could make self.socket into a property instead of monkey
2563
# patching socket.socket.)
2564
#
2565
# Create a one-time-only replacement for socket.socket()
2566
@functools.wraps(socket.socket)
2567
def socket_wrapper(*args, **kwargs):
2568
# Restore original function so subsequent calls are
2569
# not affected.
2570
socket.socket = self.socket_socket
2571
del self.socket_socket
2572
# This time only, return a new socket object from the
2573
# saved file descriptor.
2574
return socket.fromfd(self.socketfd, *args, **kwargs)
2575
# Replace socket.socket() function with wrapper
2576
socket.socket = socket_wrapper
2577
# The socketserver.TCPServer.__init__ will call
2578
# socket.socket(), which might be our replacement,
2579
# socket_wrapper(), if socketfd was set.
2580
socketserver.TCPServer.__init__(self, server_address,
2581
RequestHandlerClass)
2582
740
address_family = socket.AF_INET6
741
def __init__(self, *args, **kwargs):
742
if "settings" in kwargs:
743
self.settings = kwargs["settings"]
744
del kwargs["settings"]
745
if "clients" in kwargs:
746
self.clients = kwargs["clients"]
747
del kwargs["clients"]
748
self.enabled = False
749
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2583
750
def server_bind(self):
2584
751
"""This overrides the normal server_bind() function
2585
752
to bind to an interface if one was specified, and also NOT to
2586
753
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
2588
if self.interface is not None:
2589
if SO_BINDTODEVICE is None:
2590
# Fall back to a hard-coded value which seems to be
2591
# common enough.
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
754
if self.settings["interface"]:
755
# 25 is from /usr/include/asm-i486/socket.h
756
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2594
757
try:
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2605
self.interface)
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
758
self.socket.setsockopt(socket.SOL_SOCKET,
759
SO_BINDTODEVICE,
760
self.settings["interface"])
761
except socket.error, error:
762
if error[0] == errno.EPERM:
763
logger.error(u"No permission to"
764
u" bind to interface %s",
765
self.settings["interface"])
2609
766
else:
2610
raise
767
raise error
2611
768
# Only bind(2) the socket if we really need to.
2612
769
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
2615
770
if not self.server_address[0]:
2616
if self.address_family == socket.AF_INET6:
2617
any_address = "::" # in6addr_any
2618
else:
2619
any_address = "0.0.0.0" # INADDR_ANY
2620
self.server_address = (any_address,
771
in6addr_any = "::"
772
self.server_address = (in6addr_any,
2621
773
self.server_address[1])
2622
774
elif not self.server_address[1]:
2623
self.server_address = (self.server_address[0], 0)
2624
# if self.interface:
775
self.server_address = (self.server_address[0],
776
0)
777
# if self.settings["interface"]:
2625
778
# self.server_address = (self.server_address[0],
2626
779
# 0, # port
2627
780
# 0, # flowinfo
2628
781
# if_nametoindex
2629
# (self.interface))
2630
return socketserver.TCPServer.server_bind(self)
2631
2632
2633
class MandosServer(IPv6_TCPServer):
2634
"""Mandos server.
2635
2636
Attributes:
2637
clients: set of Client objects
2638
gnutls_priority GnuTLS priority string
2639
use_dbus: Boolean; to emit D-Bus signals or not
2640
2641
Assumes a GLib.MainLoop event loop.
2642
"""
2643
2644
def __init__(self, server_address, RequestHandlerClass,
2645
interface=None,
2646
use_ipv6=True,
2647
clients=None,
2648
gnutls_priority=None,
2649
use_dbus=True,
2650
socketfd=None):
2651
self.enabled = False
2652
self.clients = clients
2653
if self.clients is None:
2654
self.clients = {}
2655
self.use_dbus = use_dbus
2656
self.gnutls_priority = gnutls_priority
2657
IPv6_TCPServer.__init__(self, server_address,
2658
RequestHandlerClass,
2659
interface=interface,
2660
use_ipv6=use_ipv6,
2661
socketfd=socketfd)
2662
782
# (self.settings
783
# ["interface"]))
784
return super(IPv6_TCPServer, self).server_bind()
2663
785
def server_activate(self):
2664
786
if self.enabled:
2665
return socketserver.TCPServer.server_activate(self)
2666
787
return super(IPv6_TCPServer, self).server_activate()
2667
788
def enable(self):
2668
789
self.enabled = True
2669
790
2670
def add_pipe(self, parent_pipe, proc):
2671
# Call "handle_ipc" for both data and EOF events
2672
GLib.io_add_watch(
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2677
proc=proc))
2678
2679
def handle_ipc(self, source, condition,
2680
parent_pipe=None,
2681
proc=None,
2682
client_object=None):
2683
# error, or the other end of multiprocessing.Pipe has closed
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2685
# Wait for other process to exit
2686
proc.join()
2687
return False
2688
2689
# Read a request from the child
2690
request = parent_pipe.recv()
2691
command = request[0]
2692
2693
if command == 'init':
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2697
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2700
continue
2701
if key_id and c.key_id == key_id:
2702
client = c
2703
break
2704
if fpr and c.fingerprint == fpr:
2705
client = c
2706
break
2707
else:
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
2710
if self.use_dbus:
2711
# Emit D-Bus signal
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
2713
address[0])
2714
parent_pipe.send(False)
2715
return False
2716
2717
GLib.io_add_watch(
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2722
proc=proc,
2723
client_object=client))
2724
parent_pipe.send(True)
2725
# remove the old hook in favor of the new above hook on
2726
# same fileno
2727
return False
2728
if command == 'funcall':
2729
funcname = request[1]
2730
args = request[2]
2731
kwargs = request[3]
2732
2733
parent_pipe.send(('data', getattr(client_object,
2734
funcname)(*args,
2735
**kwargs)))
2736
2737
if command == 'getattr':
2738
attrname = request[1]
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
2742
else:
2743
parent_pipe.send((
2744
'data', client_object.__getattribute__(attrname)))
2745
2746
if command == 'setattr':
2747
attrname = request[1]
2748
value = request[2]
2749
setattr(client_object, attrname, value)
2750
2751
return True
2752
2753
2754
def rfc3339_duration_to_delta(duration):
2755
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2756
2757
>>> rfc3339_duration_to_delta("P7D")
2758
datetime.timedelta(7)
2759
>>> rfc3339_duration_to_delta("PT60S")
2760
datetime.timedelta(0, 60)
2761
>>> rfc3339_duration_to_delta("PT60M")
2762
datetime.timedelta(0, 3600)
2763
>>> rfc3339_duration_to_delta("PT24H")
2764
datetime.timedelta(1)
2765
>>> rfc3339_duration_to_delta("P1W")
2766
datetime.timedelta(7)
2767
>>> rfc3339_duration_to_delta("PT5M30S")
2768
datetime.timedelta(0, 330)
2769
>>> rfc3339_duration_to_delta("P1DT3M20S")
2770
datetime.timedelta(1, 200)
2771
"""
2772
2773
# Parsing an RFC 3339 duration with regular expressions is not
2774
# possible - there would have to be multiple places for the same
2775
# values, like seconds. The current code, while more esoteric, is
2776
# cleaner without depending on a parsing library. If Python had a
2777
# built-in library for parsing we would use it, but we'd like to
2778
# avoid excessive use of external libraries.
2779
2780
# New type for defining tokens, syntax, and semantics all-in-one
2781
Token = collections.namedtuple("Token", (
2782
"regexp", # To match token; if "value" is not None, must have
2783
# a "group" containing digits
2784
"value", # datetime.timedelta or None
2785
"followers")) # Tokens valid after this token
2786
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2787
# the "duration" ABNF definition in RFC 3339, Appendix A.
2788
token_end = Token(re.compile(r"$"), None, frozenset())
2789
token_second = Token(re.compile(r"(\d+)S"),
2790
datetime.timedelta(seconds=1),
2791
frozenset((token_end, )))
2792
token_minute = Token(re.compile(r"(\d+)M"),
2793
datetime.timedelta(minutes=1),
2794
frozenset((token_second, token_end)))
2795
token_hour = Token(re.compile(r"(\d+)H"),
2796
datetime.timedelta(hours=1),
2797
frozenset((token_minute, token_end)))
2798
token_time = Token(re.compile(r"T"),
2799
None,
2800
frozenset((token_hour, token_minute,
2801
token_second)))
2802
token_day = Token(re.compile(r"(\d+)D"),
2803
datetime.timedelta(days=1),
2804
frozenset((token_time, token_end)))
2805
token_month = Token(re.compile(r"(\d+)M"),
2806
datetime.timedelta(weeks=4),
2807
frozenset((token_day, token_end)))
2808
token_year = Token(re.compile(r"(\d+)Y"),
2809
datetime.timedelta(weeks=52),
2810
frozenset((token_month, token_end)))
2811
token_week = Token(re.compile(r"(\d+)W"),
2812
datetime.timedelta(weeks=1),
2813
frozenset((token_end, )))
2814
token_duration = Token(re.compile(r"P"), None,
2815
frozenset((token_year, token_month,
2816
token_day, token_time,
2817
token_week)))
2818
# Define starting values:
2819
# Value so far
2820
value = datetime.timedelta()
2821
found_token = None
2822
# Following valid tokens
2823
followers = frozenset((token_duration, ))
2824
# String left to parse
2825
s = duration
2826
# Loop until end token is found
2827
while found_token is not token_end:
2828
# Search for any currently valid tokens
2829
for token in followers:
2830
match = token.regexp.match(s)
2831
if match is not None:
2832
# Token found
2833
if token.value is not None:
2834
# Value found, parse digits
2835
factor = int(match.group(1), 10)
2836
# Add to value so far
2837
value += factor * token.value
2838
# Strip token from string
2839
s = token.regexp.sub("", s, 1)
2840
# Go to found token
2841
found_token = token
2842
# Set valid next tokens
2843
followers = found_token.followers
2844
break
2845
else:
2846
# No currently valid tokens were found
2847
raise ValueError("Invalid RFC 3339 duration: {!r}"
2848
.format(duration))
2849
# End token found
2850
return value
2851
2852
791
2853
792
def string_to_delta(interval):
2854
793
"""Parse a string and return a datetime.timedelta
2855
794
2856
795
>>> string_to_delta('7d')
2857
796
datetime.timedelta(7)
2858
797
>>> string_to_delta('60s')
2861
800
datetime.timedelta(0, 3600)
2862
801
>>> string_to_delta('24h')
2863
802
datetime.timedelta(1)
2864
>>> string_to_delta('1w')
803
>>> string_to_delta(u'1w')
2865
804
datetime.timedelta(7)
2866
805
>>> string_to_delta('5m 30s')
2867
806
datetime.timedelta(0, 330)
2868
807
"""
2869
2870
try:
2871
return rfc3339_duration_to_delta(interval)
2872
except ValueError:
2873
pass
2874
2875
808
timevalue = datetime.timedelta(0)
2876
809
for s in interval.split():
2877
810
try:
2878
suffix = s[-1]
811
suffix = unicode(s[-1])
2879
812
value = int(s[:-1])
2880
if suffix == "d":
813
if suffix == u"d":
2881
814
delta = datetime.timedelta(value)
2882
elif suffix == "s":
815
elif suffix == u"s":
2883
816
delta = datetime.timedelta(0, value)
2884
elif suffix == "m":
817
elif suffix == u"m":
2885
818
delta = datetime.timedelta(0, 0, 0, 0, value)
2886
elif suffix == "h":
819
elif suffix == u"h":
2887
820
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2888
elif suffix == "w":
821
elif suffix == u"w":
2889
822
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2890
823
else:
2891
raise ValueError("Unknown suffix {!r}".format(suffix))
2892
except IndexError as e:
2893
raise ValueError(*(e.args))
824
raise ValueError
825
except (ValueError, IndexError):
826
raise ValueError
2894
827
timevalue += delta
2895
828
return timevalue
2896
829
2897
830
2898
def daemon(nochdir=False, noclose=False):
831
def server_state_changed(state):
832
"""Derived from the Avahi example code"""
833
if state == avahi.SERVER_COLLISION:
834
logger.error(u"Zeroconf server name collision")
835
service.remove()
836
elif state == avahi.SERVER_RUNNING:
837
service.add()
838
839
840
def entry_group_state_changed(state, error):
841
"""Derived from the Avahi example code"""
842
logger.debug(u"Avahi state change: %i", state)
843
844
if state == avahi.ENTRY_GROUP_ESTABLISHED:
845
logger.debug(u"Zeroconf service established.")
846
elif state == avahi.ENTRY_GROUP_COLLISION:
847
logger.warning(u"Zeroconf service name collision.")
848
service.rename()
849
elif state == avahi.ENTRY_GROUP_FAILURE:
850
logger.critical(u"Avahi: Error in group state changed %s",
851
unicode(error))
852
raise AvahiGroupError(u"State changed: %s" % unicode(error))
853
854
def if_nametoindex(interface):
855
"""Call the C function if_nametoindex(), or equivalent"""
856
global if_nametoindex
857
try:
858
if_nametoindex = (ctypes.cdll.LoadLibrary
859
(ctypes.util.find_library("c"))
860
.if_nametoindex)
861
except (OSError, AttributeError):
862
if "struct" not in sys.modules:
863
import struct
864
if "fcntl" not in sys.modules:
865
import fcntl
866
def if_nametoindex(interface):
867
"Get an interface index the hard way, i.e. using fcntl()"
868
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
869
with closing(socket.socket()) as s:
870
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
struct.pack("16s16x", interface))
872
interface_index = struct.unpack("I", ifreq[16:20])[0]
873
return interface_index
874
return if_nametoindex(interface)
875
876
877
def daemon(nochdir = False, noclose = False):
2899
878
"""See daemon(3). Standard BSD Unix function.
2900
2901
879
This should really exist as os.daemon, but it doesn't (yet)."""
2902
880
if os.fork():
2903
881
sys.exit()
2908
886
sys.exit()
2909
887
if not noclose:
2910
888
# Close all standard open file descriptors
2911
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
889
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2912
890
if not stat.S_ISCHR(os.fstat(null).st_mode):
2913
891
raise OSError(errno.ENODEV,
2914
"{} not a character device"
2915
.format(os.devnull))
892
"/dev/null not a character device")
2916
893
os.dup2(null, sys.stdin.fileno())
2917
894
os.dup2(null, sys.stdout.fileno())
2918
895
os.dup2(null, sys.stderr.fileno())
2921
898
2922
899
2923
900
def main():
2924
2925
##################################################################
2926
# Parsing of options, both command line and config file
2927
2928
parser = argparse.ArgumentParser()
2929
parser.add_argument("-v", "--version", action="version",
2930
version="%(prog)s {}".format(version),
2931
help="show version number and exit")
2932
parser.add_argument("-i", "--interface", metavar="IF",
2933
help="Bind to interface IF")
2934
parser.add_argument("-a", "--address",
2935
help="Address to listen for requests on")
2936
parser.add_argument("-p", "--port", type=int,
2937
help="Port number to receive requests on")
2938
parser.add_argument("--check", action="store_true",
2939
help="Run self-test")
2940
parser.add_argument("--debug", action="store_true",
2941
help="Debug mode; run in foreground and log"
2942
" to terminal", default=None)
2943
parser.add_argument("--debuglevel", metavar="LEVEL",
2944
help="Debug level for stdout output")
2945
parser.add_argument("--priority", help="GnuTLS"
2946
" priority string (see GnuTLS documentation)")
2947
parser.add_argument("--servicename",
2948
metavar="NAME", help="Zeroconf service name")
2949
parser.add_argument("--configdir",
2950
default="/etc/mandos", metavar="DIR",
2951
help="Directory to search for configuration"
2952
" files")
2953
parser.add_argument("--no-dbus", action="store_false",
2954
dest="use_dbus", help="Do not provide D-Bus"
2955
" system bus interface", default=None)
2956
parser.add_argument("--no-ipv6", action="store_false",
2957
dest="use_ipv6", help="Do not use IPv6",
2958
default=None)
2959
parser.add_argument("--no-restore", action="store_false",
2960
dest="restore", help="Do not restore stored"
2961
" state", default=None)
2962
parser.add_argument("--socket", type=int,
2963
help="Specify a file descriptor to a network"
2964
" socket to use instead of creating one")
2965
parser.add_argument("--statedir", metavar="DIR",
2966
help="Directory to save/restore state in")
2967
parser.add_argument("--foreground", action="store_true",
2968
help="Run in foreground", default=None)
2969
parser.add_argument("--no-zeroconf", action="store_false",
2970
dest="zeroconf", help="Do not use Zeroconf",
2971
default=None)
2972
2973
options = parser.parse_args()
2974
901
parser = optparse.OptionParser(version = "%%prog %s" % version)
902
parser.add_option("-i", "--interface", type="string",
903
metavar="IF", help="Bind to interface IF")
904
parser.add_option("-a", "--address", type="string",
905
help="Address to listen for requests on")
906
parser.add_option("-p", "--port", type="int",
907
help="Port number to receive requests on")
908
parser.add_option("--check", action="store_true",
909
help="Run self-test")
910
parser.add_option("--debug", action="store_true",
911
help="Debug mode; run in foreground and log to"
912
" terminal")
913
parser.add_option("--priority", type="string", help="GnuTLS"
914
" priority string (see GnuTLS documentation)")
915
parser.add_option("--servicename", type="string", metavar="NAME",
916
help="Zeroconf service name")
917
parser.add_option("--configdir", type="string",
918
default="/etc/mandos", metavar="DIR",
919
help="Directory to search for configuration"
920
" files")
921
parser.add_option("--no-dbus", action="store_false",
922
dest="use_dbus",
923
help="Do not provide D-Bus system bus"
924
" interface")
925
options = parser.parse_args()[0]
926
2975
927
if options.check:
2976
928
import doctest
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2979
929
doctest.testmod()
930
sys.exit()
931
2980
932
# Default values for config file for server-global settings
2981
if gnutls.has_rawpk:
2982
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2983
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2984
else:
2985
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2986
":+SIGN-DSA-SHA256")
2987
server_defaults = {"interface": "",
2988
"address": "",
2989
"port": "",
2990
"debug": "False",
2991
"priority": priority,
2992
"servicename": "Mandos",
2993
"use_dbus": "True",
2994
"use_ipv6": "True",
2995
"debuglevel": "",
2996
"restore": "True",
2997
"socket": "",
2998
"statedir": "/var/lib/mandos",
2999
"foreground": "False",
3000
"zeroconf": "True",
3001
}
3002
del priority
3003
933
server_defaults = { "interface": "",
934
"address": "",
935
"port": "",
936
"debug": "False",
937
"priority":
938
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
"servicename": "Mandos",
940
"use_dbus": "True",
941
}
942
3004
943
# Parse config file for server-global settings
3005
server_config = configparser.ConfigParser(server_defaults)
944
server_config = ConfigParser.SafeConfigParser(server_defaults)
3006
945
del server_defaults
3007
946
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
947
# Convert the SafeConfigParser object to a dict
3009
948
server_settings = server_config.defaults()
3010
949
# Use the appropriate methods on the non-string config options
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
3013
server_settings[option] = server_config.getboolean("DEFAULT",
3014
option)
950
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
"debug")
952
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
"use_dbus")
3015
954
if server_settings["port"]:
3016
955
server_settings["port"] = server_config.getint("DEFAULT",
3017
956
"port")
3018
if server_settings["socket"]:
3019
server_settings["socket"] = server_config.getint("DEFAULT",
3020
"socket")
3021
# Later, stdin will, and stdout and stderr might, be dup'ed
3022
# over with an opened os.devnull. But we don't want this to
3023
# happen with a supplied network socket.
3024
if 0 <= server_settings["socket"] <= 2:
3025
server_settings["socket"] = os.dup(server_settings
3026
["socket"])
3027
957
del server_config
3028
958
3029
959
# Override the settings from the config file with command line
3030
960
# options, if set.
3031
961
for option in ("interface", "address", "port", "debug",
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
962
"priority", "servicename", "configdir",
963
"use_dbus"):
3035
964
value = getattr(options, option)
3036
965
if value is not None:
3037
966
server_settings[option] = value
3038
967
del options
3039
# Force all strings to be unicode
3040
for option in server_settings.keys():
3041
if isinstance(server_settings[option], bytes):
3042
server_settings[option] = (server_settings[option]
3043
.decode("utf-8"))
3044
# Force all boolean options to be boolean
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
3047
server_settings[option] = bool(server_settings[option])
3048
# Debug implies foreground
3049
if server_settings["debug"]:
3050
server_settings["foreground"] = True
3051
968
# Now we have our good server settings in "server_settings"
3052
3053
##################################################################
3054
3055
if (not server_settings["zeroconf"]
3056
and not (server_settings["port"]
3057
or server_settings["socket"] != "")):
3058
parser.error("Needs port or socket to work without Zeroconf")
3059
969
3060
970
# For convenience
3061
971
debug = server_settings["debug"]
3062
debuglevel = server_settings["debuglevel"]
3063
972
use_dbus = server_settings["use_dbus"]
3064
use_ipv6 = server_settings["use_ipv6"]
3065
stored_state_path = os.path.join(server_settings["statedir"],
3066
stored_state_file)
3067
foreground = server_settings["foreground"]
3068
zeroconf = server_settings["zeroconf"]
3069
973
3070
if debug:
3071
initlogger(debug, logging.DEBUG)
974
def sigsegvhandler(signum, frame):
975
raise RuntimeError('Segmentation fault')
976
977
if not debug:
978
syslogger.setLevel(logging.WARNING)
979
console.setLevel(logging.WARNING)
3072
980
else:
3073
if not debuglevel:
3074
initlogger(debug)
3075
else:
3076
level = getattr(logging, debuglevel.upper())
3077
initlogger(debug, level)
3078
981
signal.signal(signal.SIGSEGV, sigsegvhandler)
982
3079
983
if server_settings["servicename"] != "Mandos":
3080
syslogger.setFormatter(
3081
logging.Formatter('Mandos ({}) [%(process)d]:'
3082
' %(levelname)s: %(message)s'.format(
3083
server_settings["servicename"])))
3084
984
syslogger.setFormatter(logging.Formatter
985
('Mandos (%s): %%(levelname)s:'
986
' %%(message)s'
987
% server_settings["servicename"]))
988
3085
989
# Parse config file with clients
3086
client_config = configparser.ConfigParser(Client.client_defaults)
990
client_defaults = { "timeout": "1h",
991
"interval": "5m",
992
"checker": "fping -q -- %%(host)s",
993
"host": "",
994
}
995
client_config = ConfigParser.SafeConfigParser(client_defaults)
3087
996
client_config.read(os.path.join(server_settings["configdir"],
3088
997
"clients.conf"))
3089
3090
global mandos_dbus_service
3091
mandos_dbus_service = None
3092
3093
socketfd = None
3094
if server_settings["socket"] != "":
3095
socketfd = server_settings["socket"]
3096
tcp_server = MandosServer(
3097
(server_settings["address"], server_settings["port"]),
3098
ClientHandler,
3099
interface=(server_settings["interface"] or None),
3100
use_ipv6=use_ipv6,
3101
gnutls_priority=server_settings["priority"],
3102
use_dbus=use_dbus,
3103
socketfd=socketfd)
3104
if not foreground:
3105
pidfilename = "/run/mandos.pid"
3106
if not os.path.isdir("/run/."):
3107
pidfilename = "/var/run/mandos.pid"
3108
pidfile = None
3109
try:
3110
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3111
except IOError as e:
3112
logger.error("Could not open file %r", pidfilename,
3113
exc_info=e)
3114
3115
for name, group in (("_mandos", "_mandos"),
3116
("mandos", "mandos"),
3117
("nobody", "nogroup")):
3118
try:
3119
uid = pwd.getpwnam(name).pw_uid
3120
gid = pwd.getpwnam(group).pw_gid
3121
break
998
999
clients = Set()
1000
tcp_server = IPv6_TCPServer((server_settings["address"],
1001
server_settings["port"]),
1002
TCP_handler,
1003
settings=server_settings,
1004
clients=clients)
1005
pidfilename = "/var/run/mandos.pid"
1006
try:
1007
pidfile = open(pidfilename, "w")
1008
except IOError, error:
1009
logger.error("Could not open file %r", pidfilename)
1010
1011
try:
1012
uid = pwd.getpwnam("_mandos").pw_uid
1013
gid = pwd.getpwnam("_mandos").pw_gid
1014
except KeyError:
1015
try:
1016
uid = pwd.getpwnam("mandos").pw_uid
1017
gid = pwd.getpwnam("mandos").pw_gid
3122
1018
except KeyError:
3123
continue
3124
else:
3125
uid = 65534
3126
gid = 65534
1019
try:
1020
uid = pwd.getpwnam("nobody").pw_uid
1021
gid = pwd.getpwnam("nogroup").pw_gid
1022
except KeyError:
1023
uid = 65534
1024
gid = 65534
3127
1025
try:
3128
1026
os.setgid(gid)
3129
1027
os.setuid(uid)
3130
if debug:
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3132
gid))
3133
except OSError as error:
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
3137
raise
3138
1028
except OSError, error:
1029
if error[0] != errno.EPERM:
1030
raise error
1031
1032
# Enable all possible GnuTLS debugging
3139
1033
if debug:
3140
# Enable all possible GnuTLS debugging
3141
3142
1034
# "Use a log level over 10 to enable all debugging options."
3143
1035
# - GnuTLS manual
3144
gnutls.global_set_log_level(11)
3145
3146
@gnutls.log_func
1036
gnutls.library.functions.gnutls_global_set_log_level(11)
1037
1038
@gnutls.library.types.gnutls_log_func
3147
1039
def debug_gnutls(level, string):
3148
1040
logger.debug("GnuTLS: %s", string[:-1])
3149
3150
gnutls.global_set_log_function(debug_gnutls)
3151
3152
# Redirect stdin so all checkers get /dev/null
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3154
os.dup2(null, sys.stdin.fileno())
3155
if null > 2:
3156
os.close(null)
3157
3158
# Need to fork before connecting to D-Bus
3159
if not foreground:
3160
# Close all input and output, do double fork, etc.
3161
daemon()
3162
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
3166
GLib.threads_init()
3167
1041
1042
(gnutls.library.functions
1043
.gnutls_global_set_log_function(debug_gnutls))
1044
1045
global service
1046
service = AvahiService(name = server_settings["servicename"],
1047
servicetype = "_mandos._tcp", )
1048
if server_settings["interface"]:
1049
service.interface = (if_nametoindex
1050
(server_settings["interface"]))
1051
3168
1052
global main_loop
1053
global bus
1054
global server
3169
1055
# From the Avahi example code
3170
DBusGMainLoop(set_as_default=True)
3171
main_loop = GLib.MainLoop()
1056
DBusGMainLoop(set_as_default=True )
1057
main_loop = gobject.MainLoop()
3172
1058
bus = dbus.SystemBus()
1059
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
avahi.DBUS_PATH_SERVER),
1061
avahi.DBUS_INTERFACE_SERVER)
3173
1062
# End of Avahi example code
3174
1063
if use_dbus:
3175
try:
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
3177
bus,
3178
do_not_queue=True)
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3181
do_not_queue=True)
3182
except dbus.exceptions.DBusException as e:
3183
logger.error("Disabling D-Bus:", exc_info=e)
3184
use_dbus = False
3185
server_settings["use_dbus"] = False
3186
tcp_server.use_dbus = False
3187
if zeroconf:
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3192
protocol=protocol,
3193
bus=bus)
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
3197
3198
global multiprocessing_manager
3199
multiprocessing_manager = multiprocessing.Manager()
3200
3201
client_class = Client
3202
if use_dbus:
3203
client_class = functools.partial(ClientDBus, bus=bus)
3204
3205
client_settings = Client.config_parser(client_config)
3206
old_client_settings = {}
3207
clients_data = {}
3208
3209
# This is used to redirect stdout and stderr for checker processes
3210
global wnull
3211
wnull = open(os.devnull, "w") # A writable /dev/null
3212
# Only used if server is running in foreground but not in debug
3213
# mode
3214
if debug or not foreground:
3215
wnull.close()
3216
3217
# Get client data and settings from last running state.
3218
if server_settings["restore"]:
3219
try:
3220
with open(stored_state_path, "rb") as stored_state:
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3223
stored_state)
3224
else:
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3228
# clients_data
3229
# .keys()
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3232
else key): value
3233
for key, value in
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3239
for k, v in
3240
clients_data[key].items()}
3241
clients_data[key] = value
3242
# .client_structure
3243
value["client_structure"] = [
3244
(s.decode("utf-8")
3245
if isinstance(s, bytes)
3246
else s) for s in
3247
value["client_structure"]]
3248
# .name & .host
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3257
# .keys()
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3261
else key): value
3262
for key, value in
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3265
# .host
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
3269
.decode("utf-8"))
3270
os.remove(stored_state_path)
3271
except IOError as e:
3272
if e.errno == errno.ENOENT:
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
3275
else:
3276
logger.critical("Could not load persistent state:",
3277
exc_info=e)
3278
raise
3279
except EOFError as e:
3280
logger.warning("Could not load persistent state: "
3281
"EOFError:",
3282
exc_info=e)
3283
3284
with PGPEngine() as pgp:
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
3288
continue
3289
3290
# Decide which value to use after restoring saved state.
3291
# We have three different values: Old config file,
3292
# new config file, and saved state.
3293
# New config value takes precedence if it differs from old
3294
# config value, otherwise use saved state.
3295
for name, value in client_settings[client_name].items():
3296
try:
3297
# For each value in new config, check if it
3298
# differs from the old config value (Except for
3299
# the "secret" attribute)
3300
if (name != "secret"
3301
and (value !=
3302
old_client_settings[client_name][name])):
3303
client[name] = value
3304
except KeyError:
3305
pass
3306
3307
# Clients who has passed its expire date can still be
3308
# enabled if its last checker was successful. A Client
3309
# whose checker succeeded before we stored its state is
3310
# assumed to have successfully run all checkers during
3311
# downtime.
3312
if client["enabled"]:
3313
if datetime.datetime.utcnow() >= client["expires"]:
3314
if not client["last_checked_ok"]:
3315
logger.warning(
3316
"disabling client {} - Client never "
3317
"performed a successful checker".format(
3318
client_name))
3319
client["enabled"] = False
3320
elif client["last_checker_status"] != 0:
3321
logger.warning(
3322
"disabling client {} - Client last"
3323
" checker failed with error code"
3324
" {}".format(
3325
client_name,
3326
client["last_checker_status"]))
3327
client["enabled"] = False
3328
else:
3329
client["expires"] = (
3330
datetime.datetime.utcnow()
3331
+ client["timeout"])
3332
logger.debug("Last checker succeeded,"
3333
" keeping {} enabled".format(
3334
client_name))
3335
try:
3336
client["secret"] = pgp.decrypt(
3337
client["encrypted_secret"],
3338
client_settings[client_name]["secret"])
3339
except PGPError:
3340
# If decryption fails, we use secret from new settings
3341
logger.debug("Failed to decrypt {} old secret".format(
3342
client_name))
3343
client["secret"] = (client_settings[client_name]
3344
["secret"])
3345
3346
# Add/remove clients based on new changes made to config
3347
for client_name in (set(old_client_settings)
3348
- set(client_settings)):
3349
del clients_data[client_name]
3350
for client_name in (set(client_settings)
3351
- set(old_client_settings)):
3352
clients_data[client_name] = client_settings[client_name]
3353
3354
# Create all client objects
3355
for client_name, client in clients_data.items():
3356
tcp_server.clients[client_name] = client_class(
3357
name=client_name,
3358
settings=client,
3359
server_settings=server_settings)
3360
3361
if not tcp_server.clients:
3362
logger.warning("No clients defined")
3363
3364
if not foreground:
3365
if pidfile is not None:
3366
pid = os.getpid()
3367
try:
3368
with pidfile:
3369
print(pid, file=pidfile)
3370
except IOError:
3371
logger.error("Could not write to file %r with PID %d",
3372
pidfilename, pid)
1064
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1065
1066
clients.update(Set(Client(name = section,
1067
config
1068
= dict(client_config.items(section)),
1069
use_dbus = use_dbus)
1070
for section in client_config.sections()))
1071
if not clients:
1072
logger.warning(u"No clients defined")
1073
1074
if debug:
1075
# Redirect stdin so all checkers get /dev/null
1076
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1077
os.dup2(null, sys.stdin.fileno())
1078
if null > 2:
1079
os.close(null)
1080
else:
1081
# No console logging
1082
logger.removeHandler(console)
1083
# Close all input and output, do double fork, etc.
1084
daemon()
1085
1086
try:
1087
pid = os.getpid()
1088
pidfile.write(str(pid) + "\n")
1089
pidfile.close()
3373
1090
del pidfile
3374
del pidfilename
3375
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
3379
1091
except IOError:
1092
logger.error(u"Could not write to file %r with PID %d",
1093
pidfilename, pid)
1094
except NameError:
1095
# "pidfile" was never created
1096
pass
1097
del pidfilename
1098
1099
def cleanup():
1100
"Cleanup function; run on exit"
1101
global group
1102
# From the Avahi example code
1103
if not group is None:
1104
group.Free()
1105
group = None
1106
# End of Avahi example code
1107
1108
while clients:
1109
client = clients.pop()
1110
client.disable_hook = None
1111
client.disable()
1112
1113
atexit.register(cleanup)
1114
1115
if not debug:
1116
signal.signal(signal.SIGINT, signal.SIG_IGN)
1117
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
3380
1120
if use_dbus:
3381
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
1121
class MandosServer(dbus.service.Object):
3385
1122
"""A D-Bus proxy object"""
3386
3387
1123
def __init__(self):
3388
1124
dbus.service.Object.__init__(self, bus, "/")
3389
3390
_interface = "se.recompile.Mandos"
3391
3392
@dbus.service.signal(_interface, signature="o")
3393
def ClientAdded(self, objpath):
3394
"D-Bus signal"
3395
pass
3396
3397
@dbus.service.signal(_interface, signature="ss")
3398
def ClientNotFound(self, key_id, address):
3399
"D-Bus signal"
3400
pass
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
1125
_interface = u"se.bsnet.fukt.Mandos"
1126
1127
@dbus.service.signal(_interface, signature="oa{sv}")
1128
def ClientAdded(self, objpath, properties):
1129
"D-Bus signal"
1130
pass
1131
3404
1132
@dbus.service.signal(_interface, signature="os")
3405
1133
def ClientRemoved(self, objpath, name):
3406
1134
"D-Bus signal"
3407
1135
pass
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
1136
3411
1137
@dbus.service.method(_interface, out_signature="ao")
3412
1138
def GetAllClients(self):
3413
1139
"D-Bus method"
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3416
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3418
"true"})
3419
@dbus.service.method(_interface,
3420
out_signature="a{oa{sv}}")
1140
return dbus.Array(c.dbus_object_path for c in clients)
1141
1142
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3421
1143
def GetAllClientsWithProperties(self):
3422
1144
"D-Bus method"
3423
1145
return dbus.Dictionary(
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
1146
((c.dbus_object_path, c.GetAllProperties())
1147
for c in clients),
3427
1148
signature="oa{sv}")
3428
1149
3429
1150
@dbus.service.method(_interface, in_signature="o")
3430
1151
def RemoveClient(self, object_path):
3431
1152
"D-Bus method"
3432
for c in tcp_server.clients.values():
1153
for c in clients:
3433
1154
if c.dbus_object_path == object_path:
3434
del tcp_server.clients[c.name]
3435
c.remove_from_connection()
3436
# Don't signal the disabling
3437
c.disable(quiet=True)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
1155
clients.remove(c)
1156
# Don't signal anything except ClientRemoved
1157
c.use_dbus = False
1158
c.disable()
1159
# Emit D-Bus signal
1160
self.ClientRemoved(object_path, c.name)
3440
1161
return
3441
raise KeyError(object_path)
3442
1162
raise KeyError
1163
3443
1164
del _interface
3444
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3448
"""D-Bus method"""
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3451
dbus.Dictionary(
3452
{interface: client.GetAll(interface)
3453
for interface in
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3456
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3459
if use_dbus:
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3463
dbus.Dictionary(
3464
{interface: client.GetAll(interface)
3465
for interface in
3466
client._get_all_interface_names()}))
3467
# Old signal
3468
self.ClientAdded(client.dbus_object_path)
3469
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3472
if use_dbus:
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3477
# Old signal
3478
self.ClientRemoved(client.dbus_object_path,
3479
client.name)
3480
3481
mandos_dbus_service = MandosDBusService()
3482
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
3486
wn = wnull
3487
3488
def cleanup():
3489
"Cleanup function; run on exit"
3490
if zeroconf:
3491
service.cleanup()
3492
3493
mp.active_children()
3494
wn.close()
3495
if not (tcp_server.clients or client_settings):
3496
return
3497
3498
# Store client before exiting. Secrets are encrypted with key
3499
# based on what config file has. If config file is
3500
# removed/edited, old secret will thus be unrecovable.
3501
clients = {}
3502
with PGPEngine() as pgp:
3503
for client in tcp_server.clients.values():
3504
key = client_settings[client.name]["secret"]
3505
client.encrypted_secret = pgp.encrypt(client.secret,
3506
key)
3507
client_dict = {}
3508
3509
# A list of attributes that can not be pickled
3510
# + secret.
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
3514
.Object):
3515
exclude.add(name)
3516
3517
client_dict["encrypted_secret"] = (client
3518
.encrypted_secret)
3519
for attr in client.client_structure:
3520
if attr not in exclude:
3521
client_dict[attr] = getattr(client, attr)
3522
3523
clients[client.name] = client_dict
3524
del client_settings[client.name]["secret"]
3525
3526
try:
3527
with tempfile.NamedTemporaryFile(
3528
mode='wb',
3529
suffix=".pickle",
3530
prefix='clients-',
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3534
protocol=2)
3535
tempname = stored_state.name
3536
os.rename(tempname, stored_state_path)
3537
except (IOError, OSError) as e:
3538
if not debug:
3539
try:
3540
os.remove(tempname)
3541
except NameError:
3542
pass
3543
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3544
logger.warning("Could not save persistent state: {}"
3545
.format(os.strerror(e.errno)))
3546
else:
3547
logger.warning("Could not save persistent state:",
3548
exc_info=e)
3549
raise
3550
3551
# Delete all clients, and settings from config
3552
while tcp_server.clients:
3553
name, client = tcp_server.clients.popitem()
3554
if use_dbus:
3555
client.remove_from_connection()
3556
# Don't signal the disabling
3557
client.disable(quiet=True)
3558
# Emit D-Bus signal for removal
3559
if use_dbus:
3560
mandos_dbus_service.client_removed_signal(client)
3561
client_settings.clear()
3562
3563
atexit.register(cleanup)
3564
3565
for client in tcp_server.clients.values():
1165
1166
mandos_server = MandosServer()
1167
1168
for client in clients:
3566
1169
if use_dbus:
3567
# Emit D-Bus signal for adding
3568
mandos_dbus_service.client_added_signal(client)
3569
# Need to initiate checking of clients
3570
if client.enabled:
3571
client.init_checker()
3572
1170
# Emit D-Bus signal
1171
mandos_server.ClientAdded(client.dbus_object_path,
1172
client.GetAllProperties())
1173
client.enable()
1174
3573
1175
tcp_server.enable()
3574
1176
tcp_server.server_activate()
3575
1177
3576
1178
# Find out what port we got
3577
if zeroconf:
3578
service.port = tcp_server.socket.getsockname()[1]
3579
if use_ipv6:
3580
logger.info("Now listening on address %r, port %d,"
3581
" flowinfo %d, scope_id %d",
3582
*tcp_server.socket.getsockname())
3583
else: # IPv4
3584
logger.info("Now listening on address %r, port %d",
3585
*tcp_server.socket.getsockname())
3586
3587
# service.interface = tcp_server.socket.getsockname()[3]
3588
1179
service.port = tcp_server.socket.getsockname()[1]
1180
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1181
u" scope_id %d" % tcp_server.socket.getsockname())
1182
1183
#service.interface = tcp_server.socket.getsockname()[3]
1184
3589
1185
try:
3590
if zeroconf:
3591
# From the Avahi example code
3592
try:
3593
service.activate()
3594
except dbus.exceptions.DBusException as error:
3595
logger.critical("D-Bus Exception", exc_info=error)
3596
cleanup()
3597
sys.exit(1)
3598
# End of Avahi example code
3599
3600
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3601
lambda *args, **kwargs:
3602
(tcp_server.handle_request
3603
(*args[2:], **kwargs) or True))
3604
3605
logger.debug("Starting main loop")
1186
# From the Avahi example code
1187
server.connect_to_signal("StateChanged", server_state_changed)
1188
try:
1189
server_state_changed(server.GetState())
1190
except dbus.exceptions.DBusException, error:
1191
logger.critical(u"DBusException: %s", error)
1192
sys.exit(1)
1193
# End of Avahi example code
1194
1195
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1196
lambda *args, **kwargs:
1197
(tcp_server.handle_request
1198
(*args[2:], **kwargs) or True))
1199
1200
logger.debug(u"Starting main loop")
3606
1201
main_loop.run()
3607
except AvahiError as error:
3608
logger.critical("Avahi Error", exc_info=error)
3609
cleanup()
1202
except AvahiError, error:
1203
logger.critical(u"AvahiError: %s", error)
3610
1204
sys.exit(1)
3611
1205
except KeyboardInterrupt:
3612
1206
if debug:
3613
print("", file=sys.stderr)
3614
logger.debug("Server received KeyboardInterrupt")
3615
logger.debug("Server exiting")
3616
# Must run before the D-Bus bus name gets deregistered
3617
cleanup()
3618
1207
print
3619
1208
3620
1209
if __name__ == '__main__':
3621
1210
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0