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- Committer: Teddy Hogeborn
- Date: 2011-04-02 06:37:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20110402063718-13ldrcuu0t33sdc4
* mandos: Tolerate restarting Avahi servers. Also Changed to new
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/upstream
- 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
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 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
#
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
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
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
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.20"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
303
102
304
103
class AvahiError(Exception):
305
104
def __init__(self, value, *args, **kwargs):
306
105
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
310
109
311
110
class AvahiServiceError(AvahiError):
312
111
pass
313
112
314
315
113
class AvahiGroupError(AvahiError):
316
114
pass
317
115
318
116
319
117
class AvahiService(object):
320
118
"""An Avahi (Zeroconf) service.
321
119
322
120
Attributes:
323
121
interface: integer; avahi.IF_UNSPEC or an interface index.
324
122
Used to optionally bind to the specified interface.
325
123
name: string; Example: 'Mandos'
326
124
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
328
126
port: integer; what port to announce
329
127
TXT: list of strings; TXT record for the service
330
128
domain: string; Domain to publish on, default to .local if empty.
336
134
server: D-Bus Server
337
135
bus: dbus.SystemBus()
338
136
"""
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
351
141
self.interface = interface
352
142
self.name = name
353
143
self.type = servicetype
362
152
self.server = None
363
153
self.bus = bus
364
154
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
155
def rename(self):
367
156
"""Derived from the Avahi example code"""
368
157
if self.rename_count >= self.max_renames:
369
158
logger.critical("No suitable Zeroconf service name found"
370
159
" after %i retries, exiting.",
371
160
self.rename_count)
372
161
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
376
163
logger.info("Changing Zeroconf service name to %r ...",
377
164
self.name)
378
if remove:
379
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
380
170
try:
381
171
self.add()
382
172
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
392
177
def remove(self):
393
178
"""Derived from the Avahi example code"""
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
394
186
if self.entry_group_state_changed_match is not None:
395
187
self.entry_group_state_changed_match.remove()
396
188
self.entry_group_state_changed_match = None
397
if self.group is not None:
398
self.group.Reset()
399
400
189
def add(self):
401
190
"""Derived from the Avahi example code"""
402
191
self.remove()
403
if self.group is None:
404
self.group = dbus.Interface(
405
self.bus.get_object(avahi.DBUS_NAME,
406
self.server.EntryGroupNew()),
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
197
self.entry_group_state_changed_match = (
409
198
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
199
'StateChanged', self .entry_group_state_changed))
411
200
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
201
self.name, self.type)
413
202
self.group.AddService(
419
208
dbus.UInt16(self.port),
420
209
avahi.string_array_to_txt_array(self.TXT))
421
210
self.group.Commit()
422
423
211
def entry_group_state_changed(self, state, error):
424
212
"""Derived from the Avahi example code"""
425
213
logger.debug("Avahi entry group state change: %i", state)
426
214
427
215
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
216
logger.debug("Zeroconf service established.")
429
217
elif state == avahi.ENTRY_GROUP_COLLISION:
431
219
self.rename()
432
220
elif state == avahi.ENTRY_GROUP_FAILURE:
433
221
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
437
225
def cleanup(self):
438
226
"""Derived from the Avahi example code"""
439
if self.group is not None:
440
try:
441
self.group.Free()
442
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
444
pass
445
self.group = None
446
227
self.remove()
447
448
228
def server_state_changed(self, state, error=None):
449
229
"""Derived from the Avahi example code"""
450
230
logger.debug("Avahi server state change: %i", state)
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
231
bad_states = { avahi.SERVER_INVALID:
232
"Zeroconf server invalid",
233
avahi.SERVER_REGISTERING: None,
234
avahi.SERVER_COLLISION:
235
"Zeroconf server name collision",
236
avahi.SERVER_FAILURE:
237
"Zeroconf server failure" }
457
238
if state in bad_states:
458
if bad_states[state] is not None:
459
if error is None:
460
logger.error(bad_states[state])
461
else:
462
logger.error(bad_states[state] + ": %r", error)
463
self.cleanup()
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
464
242
elif state == avahi.SERVER_RUNNING:
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
243
self.add()
477
244
else:
478
if error is None:
479
logger.debug("Unknown state: %r", state)
480
else:
481
logger.debug("Unknown state: %r: %r", state, error)
482
245
logger.debug("Unknown state: %r", state)
483
246
def activate(self):
484
247
"""Derived from the Avahi example code"""
485
248
if self.server is None:
489
252
follow_name_owner_changes=True),
490
253
avahi.DBUS_INTERFACE_SERVER)
491
254
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
255
self.server_state_changed)
493
256
self.server_state_changed(self.server.GetState())
494
257
495
258
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
828
259
class Client(object):
829
260
"""A representation of a client host served by this server.
830
261
831
262
Attributes:
832
approved: bool(); 'None' if not yet approved/disapproved
263
_approved: bool(); 'None' if not yet approved/disapproved
833
264
approval_delay: datetime.timedelta(); Time to wait for approval
834
265
approval_duration: datetime.timedelta(); Duration of one approval
835
266
checker: subprocess.Popen(); a running checker process used
836
267
to see if the client lives.
837
268
'None' if no process is running.
838
checker_callback_tag: a GLib event source tag, or None
269
checker_callback_tag: a gobject event source tag, or None
839
270
checker_command: string; External command which is run to check
840
271
if client lives. %() expansions are done at
841
272
runtime with vars(self) as dict, so that for
842
273
instance %(name)s can be used in the command.
843
checker_initiator_tag: a GLib event source tag, or None
274
checker_initiator_tag: a gobject event source tag, or None
844
275
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
847
276
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
277
disable_hook: If set, called by disable() as disable_hook(self)
278
disable_initiator_tag: a gobject event source tag, or None
849
279
enabled: bool()
850
280
fingerprint: string (40 or 32 hexadecimal digits); used to
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
281
uniquely identify the client
854
282
host: string; available for use by the checker command
855
283
interval: datetime.timedelta(); How often to start a new checker
856
284
last_approval_request: datetime.datetime(); (UTC) or None
857
285
last_checked_ok: datetime.datetime(); (UTC) or None
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
286
last_enabled: datetime.datetime(); (UTC)
864
287
name: string; from the config file, used in log messages and
865
288
D-Bus identifiers
866
289
secret: bytestring; sent verbatim (over TLS) to client
867
290
timeout: datetime.timedelta(); How long from last_checked_ok
868
291
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
870
292
runtime_expansions: Allowed attributes for runtime expansion.
871
expires: datetime.datetime(); time (UTC) when a client will be
872
disabled, or None
873
server_settings: The server_settings dict from main()
874
293
"""
875
294
876
295
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
880
298
"last_enabled", "name", "timeout")
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
892
299
893
300
@staticmethod
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
900
"""
901
settings = {}
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
905
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
911
"enabled")
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
918
client["fingerprint"] = (section["fingerprint"].upper()
919
.replace(" ", ""))
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
927
"rb") as secfile:
928
client["secret"] = secfile.read()
929
else:
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
944
945
return settings
946
947
def __init__(self, settings, name=None, server_settings=None):
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
307
def timeout_milliseconds(self):
308
"Return the 'timeout' attribute in milliseconds"
309
return self._timedelta_to_milliseconds(self.timeout)
310
311
def interval_milliseconds(self):
312
"Return the 'interval' attribute in milliseconds"
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
317
318
def __init__(self, name = None, disable_hook=None, config=None):
319
"""Note: the 'checker' key in 'config' sets the
320
'checker_command' attribute and *not* the 'checker'
321
attribute."""
948
322
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
955
956
if self.enabled:
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
961
+ self.timeout)
962
else:
963
self.last_enabled = None
964
self.expires = None
965
323
if config is None:
324
config = {}
966
325
logger.debug("Creating client %r", self.name)
967
logger.debug(" Key ID: %s", self.key_id)
326
# Uppercase and remove spaces from fingerprint for later
327
# comparison purposes with return value from the fingerprint()
328
# function
329
self.fingerprint = (config["fingerprint"].upper()
330
.replace(" ", ""))
968
331
logger.debug(" Fingerprint: %s", self.fingerprint)
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
971
972
# attributes specific for this server instance
332
if "secret" in config:
333
self.secret = config["secret"].decode("base64")
334
elif "secfile" in config:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
338
self.secret = secfile.read()
339
else:
340
raise TypeError("No secret or secfile for client %s"
341
% self.name)
342
self.host = config.get("host", "")
343
self.created = datetime.datetime.utcnow()
344
self.enabled = False
345
self.last_approval_request = None
346
self.last_enabled = None
347
self.last_checked_ok = None
348
self.timeout = string_to_delta(config["timeout"])
349
self.interval = string_to_delta(config["interval"])
350
self.disable_hook = disable_hook
973
351
self.checker = None
974
352
self.checker_initiator_tag = None
975
353
self.disable_initiator_tag = None
976
354
self.checker_callback_tag = None
355
self.checker_command = config["checker"]
977
356
self.current_checker_command = None
978
self.approved = None
357
self.last_connect = None
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
979
361
self.approvals_pending = 0
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
991
992
# Send notice to process children that client state has changed
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
367
993
368
def send_changedstate(self):
994
with self.changedstate:
995
self.changedstate.notify_all()
996
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
997
373
def enable(self):
998
374
"""Start this client's checker and timeout hooks"""
999
375
if getattr(self, "enabled", False):
1000
376
# Already enabled
1001
377
return
1002
self.expires = datetime.datetime.utcnow() + self.timeout
1003
self.enabled = True
378
self.send_changedstate()
1004
379
self.last_enabled = datetime.datetime.utcnow()
1005
self.init_checker()
1006
self.send_changedstate()
1007
380
# Schedule a new checker to be started an 'interval' from now,
381
# and every interval from then on.
382
self.checker_initiator_tag = (gobject.timeout_add
383
(self.interval_milliseconds(),
384
self.start_checker))
385
# Schedule a disable() when 'timeout' has passed
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
self.enabled = True
390
# Also start a new checker *right now*.
391
self.start_checker()
392
1008
393
def disable(self, quiet=True):
1009
394
"""Disable this client."""
1010
395
if not getattr(self, "enabled", False):
1011
396
return False
1012
397
if not quiet:
398
self.send_changedstate()
399
if not quiet:
1013
400
logger.info("Disabling client %s", self.name)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
401
if getattr(self, "disable_initiator_tag", False):
402
gobject.source_remove(self.disable_initiator_tag)
1016
403
self.disable_initiator_tag = None
1017
self.expires = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
404
if getattr(self, "checker_initiator_tag", False):
405
gobject.source_remove(self.checker_initiator_tag)
1020
406
self.checker_initiator_tag = None
1021
407
self.stop_checker()
408
if self.disable_hook:
409
self.disable_hook(self)
1022
410
self.enabled = False
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
411
# Do not run this again if called by a gobject.timeout_add
1026
412
return False
1027
413
1028
414
def __del__(self):
415
self.disable_hook = None
1029
416
self.disable()
1030
1031
def init_checker(self):
1032
# Schedule a new checker to be started an 'interval' from now,
1033
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
1044
# Also start a new checker *right now*.
1045
self.start_checker()
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
417
418
def checker_callback(self, pid, condition, command):
1049
419
"""The checker has completed, so take appropriate actions."""
1050
420
self.checker_callback_tag = None
1051
421
self.checker = None
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
422
if os.WIFEXITED(condition):
423
exitstatus = os.WEXITSTATUS(condition)
424
if exitstatus == 0:
1060
425
logger.info("Checker for %(name)s succeeded",
1061
426
vars(self))
1062
427
self.checked_ok()
1063
428
else:
1064
logger.info("Checker for %(name)s failed", vars(self))
429
logger.info("Checker for %(name)s failed",
430
vars(self))
1065
431
else:
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
432
logger.warning("Checker for %(name)s crashed?",
1069
433
vars(self))
1070
return False
1071
434
1072
435
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
436
"""Bump up the timeout for this client.
437
438
This should only be called when the client has been seen,
439
alive and well.
440
"""
1074
441
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
1081
if timeout is None:
1082
timeout = self.timeout
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
1090
442
gobject.source_remove(self.disable_initiator_tag)
443
self.disable_initiator_tag = (gobject.timeout_add
444
(self.timeout_milliseconds(),
445
self.disable))
446
1091
447
def need_approval(self):
1092
448
self.last_approval_request = datetime.datetime.utcnow()
1093
449
1094
450
def start_checker(self):
1095
451
"""Start a new checker subprocess if one is not running.
1096
452
1097
453
If a checker already exists, leave it running and do
1098
454
nothing."""
1099
455
# The reason for not killing a running checker is that if we
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
456
# did that, then if a checker (for some reason) started
457
# running slowly and taking more than 'interval' time, the
458
# client would inevitably timeout, since no checker would get
459
# a chance to run to completion. If we instead leave running
1104
460
# checkers alone, the checker would have to take more time
1105
461
# than 'timeout' for the client to be disabled, which is as it
1106
462
# should be.
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
463
464
# If a checker exists, make sure it is not a zombie
465
try:
466
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
471
else:
472
if pid:
473
logger.warning("Checker was a zombie")
474
gobject.source_remove(self.checker_callback_tag)
475
self.checker_callback(pid, status,
476
self.current_checker_command)
1112
477
# Start a new checker if needed
1113
478
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
1118
479
try:
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
480
# In case checker_command has exactly one % operator
481
command = self.checker_command % self.host
482
except TypeError:
483
# Escape attributes for the shell
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
492
try:
493
command = self.checker_command % escaped_attrs
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
497
return True # Try again later
1125
498
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
499
try:
500
logger.info("Starting checker %r for %s",
501
command, self.name)
502
# We don't need to redirect stdout and stderr, since
503
# in normal mode, that is already done by daemon(),
504
# and in debug mode we don't want to. (Stdin is
505
# always replaced by /dev/null.)
506
self.checker = subprocess.Popen(command,
507
close_fds=True,
508
shell=True, cwd="/")
509
self.checker_callback_tag = (gobject.child_watch_add
510
(self.checker.pid,
511
self.checker_callback,
512
data=command))
513
# The checker may have completed before the gobject
514
# watch was added. Check for this.
515
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
516
if pid:
517
gobject.source_remove(self.checker_callback_tag)
518
self.checker_callback(pid, status, command)
519
except OSError as error:
520
logger.error("Failed to start subprocess: %s",
521
error)
522
# Re-run this periodically if run by gobject.timeout_add
1152
523
return True
1153
524
1154
525
def stop_checker(self):
1155
526
"""Force the checker process, if any, to stop."""
1156
527
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
528
gobject.source_remove(self.checker_callback_tag)
1158
529
self.checker_callback_tag = None
1159
530
if getattr(self, "checker", None) is None:
1160
531
return
1161
532
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
533
try:
534
os.kill(self.checker.pid, signal.SIGTERM)
535
#time.sleep(0.5)
536
#if self.checker.poll() is None:
537
# os.kill(self.checker.pid, signal.SIGKILL)
538
except OSError as error:
539
if error.errno != errno.ESRCH: # No such process
540
raise
1163
541
self.checker = None
1164
542
1165
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
543
def dbus_service_property(dbus_interface, signature="v",
544
access="readwrite", byte_arrays=False):
1170
545
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
546
become properties on the D-Bus.
1172
547
1173
548
The decorated method will be called with no arguments by "Get"
1174
549
and with one argument by "Set".
1175
550
1176
551
The parameters, where they are supported, are the same as
1177
552
dbus.service.method, except there is only "signature", since the
1178
553
type from Get() and the type sent to Set() is the same.
1181
556
# "Set" method, so we fail early here:
1182
557
if byte_arrays and signature != "ay":
1183
558
raise ValueError("Byte arrays not supported for non-'ay'"
1184
" signature {!r}".format(signature))
1185
559
" signature %r" % signature)
1186
560
def decorator(func):
1187
561
func._dbus_is_property = True
1188
562
func._dbus_interface = dbus_interface
1191
565
func._dbus_name = func.__name__
1192
566
if func._dbus_name.endswith("_dbus_property"):
1193
567
func._dbus_name = func._dbus_name[:-14]
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
568
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
569
return func
1240
570
return decorator
1241
571
1242
572
1243
573
class DBusPropertyException(dbus.exceptions.DBusException):
1244
574
"""A base class for D-Bus property-related exceptions
1245
575
"""
1246
pass
576
def __unicode__(self):
577
return unicode(str(self))
1247
578
1248
579
1249
580
class DBusPropertyAccessException(DBusPropertyException):
1258
589
pass
1259
590
1260
591
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
592
class DBusObjectWithProperties(dbus.service.Object):
1351
593
"""A D-Bus object with properties.
1352
594
1353
595
Classes inheriting from this can use the dbus_service_property
1354
596
decorator to expose methods as D-Bus properties. It exposes the
1355
597
standard Get(), Set(), and GetAll() methods on the D-Bus.
1356
598
"""
1357
599
600
@staticmethod
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
603
604
def _get_all_dbus_properties(self):
605
"""Returns a generator of (name, attribute) pairs
606
"""
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
610
1358
611
def _get_dbus_property(self, interface_name, property_name):
1359
612
"""Returns a bound method if one exists which is a D-Bus
1360
613
property with the specified name and interface.
1361
614
"""
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
1365
if (value._dbus_name == property_name
1366
and value._dbus_interface == interface_name):
1367
return value.__get__(self)
1368
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
1369
625
# No such property
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
627
+ interface_name + "."
628
+ property_name)
629
630
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1384
631
out_signature="v")
1385
632
def Get(self, interface_name, property_name):
1386
633
"""Standard D-Bus property Get() method, see D-Bus standard.
1392
639
if not hasattr(value, "variant_level"):
1393
640
return value
1394
641
return type(value)(value, variant_level=value.variant_level+1)
1395
642
1396
643
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1397
644
def Set(self, interface_name, property_name, value):
1398
645
"""Standard D-Bus property Set() method, see D-Bus standard.
1404
651
# The byte_arrays option is not supported yet on
1405
652
# signatures other than "ay".
1406
653
if prop._dbus_signature != "ay":
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1411
for byte in value))
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
1412
657
prop(value)
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
658
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1416
660
out_signature="a{sv}")
1417
661
def GetAll(self, interface_name):
1418
662
"""Standard D-Bus property GetAll() method, see D-Bus
1420
664
1421
665
Note: Will not include properties with access="write".
1422
666
"""
1423
properties = {}
1424
for name, prop in self._get_all_dbus_things("property"):
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
1425
669
if (interface_name
1426
670
and interface_name != prop._dbus_interface):
1427
671
# Interface non-empty but did not match
1431
675
continue
1432
676
value = prop()
1433
677
if not hasattr(value, "variant_level"):
1434
properties[name] = value
678
all[name] = value
1435
679
continue
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
1438
return dbus.Dictionary(properties, signature="sv")
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
683
1448
684
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1449
685
out_signature="s",
1450
686
path_keyword='object_path',
1451
687
connection_keyword='connection')
1452
688
def Introspect(self, object_path, connection):
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
689
"""Standard D-Bus method, overloaded to insert property tags.
1456
690
"""
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
692
connection)
1460
693
try:
1461
694
document = xml.dom.minidom.parseString(xmlstring)
1462
1463
695
def make_tag(document, name, prop):
1464
696
e = document.createElement("property")
1465
697
e.setAttribute("name", name)
1466
698
e.setAttribute("type", prop._dbus_signature)
1467
699
e.setAttribute("access", prop._dbus_access)
1468
700
return e
1469
1470
701
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
1472
702
for tag in (make_tag(document, name, prop)
1473
703
for name, prop
1474
in self._get_all_dbus_things("property")
704
in self._get_all_dbus_properties()
1475
705
if prop._dbus_interface
1476
706
== if_tag.getAttribute("name")):
1477
707
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
1494
708
# Add the names to the return values for the
1495
709
# "org.freedesktop.DBus.Properties" methods
1496
710
if (if_tag.getAttribute("name")
1511
725
except (AttributeError, xml.dom.DOMException,
1512
726
xml.parsers.expat.ExpatError) as error:
1513
727
logger.error("Failed to override Introspection method",
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1591
if dt is None:
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
1618
"""
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
# with the wrong interface name
1629
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1632
continue
1633
# Create an alternate D-Bus interface name based on
1634
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
1638
# Is this a D-Bus signal?
1639
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1644
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
# Create a new, but exactly alike, function
1653
# object, and decorate it to be a new D-Bus signal
1654
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
1666
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
1670
def fixscope(func1, func2):
1671
"""This function is a scope container to pass
1672
func1 and func2 to the "call_both" function
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
1676
def call_both(*args, **kwargs):
1677
"""This function will emit two D-Bus
1678
signals by calling func1 and func2"""
1679
func1(*args, **kwargs)
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
1687
return call_both
1688
# Create the "call_both" function and add it to
1689
# the class
1690
attr[attrname] = fixscope(attribute, new_function)
1691
# Is this a D-Bus method?
1692
elif getattr(attribute, "_dbus_is_method", False):
1693
# Create a new, but exactly alike, function
1694
# object. Decorate it to be a new D-Bus method
1695
# with the alternate D-Bus interface name. Add it
1696
# to the class.
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
1709
# Is this a D-Bus property?
1710
elif getattr(attribute, "_dbus_is_property", False):
1711
# Create a new, but exactly alike, function
1712
# object, and decorate it to be a new D-Bus
1713
# property with the alternate D-Bus interface
1714
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
728
error)
729
return xmlstring
730
731
1767
732
class ClientDBus(Client, DBusObjectWithProperties):
1768
733
"""A Client class using D-Bus
1769
734
1770
735
Attributes:
1771
736
dbus_object_path: dbus.ObjectPath
1772
737
bus: dbus.SystemBus()
1773
738
"""
1774
739
1775
740
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
741
+ ("dbus_object_path",))
742
1780
743
# dbus.service.Object doesn't use super(), so we can't either.
1781
1782
def __init__(self, bus=None, *args, **kwargs):
744
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
1783
747
self.bus = bus
1784
748
Client.__init__(self, *args, **kwargs)
1785
749
# Only now, when this client is initialized, can it show up on
1786
750
# the D-Bus
1787
client_object_name = str(self.name).translate(
751
client_object_name = unicode(self.name).translate(
1788
752
{ord("."): ord("_"),
1789
753
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
754
self.dbus_object_path = (dbus.ObjectPath
755
("/clients/" + client_object_name))
1792
756
DBusObjectWithProperties.__init__(self, self.bus,
1793
757
self.dbus_object_path)
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1800
""" Modify a variable so that it's a property which announces
1801
its changes to DBus.
1802
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
1805
dbus_name: D-Bus name of the variable
1806
type_func: Function that transform the value before sending it
1807
to the D-Bus. Default: no transform
1808
variant_level: D-Bus variant level. Default: 1
1809
"""
1810
attrname = "_{}".format(dbus_name)
1811
1812
def setter(self, value):
1813
if hasattr(self, "dbus_object_path"):
1814
if (not hasattr(self, attrname) or
1815
type_func(getattr(self, attrname, None))
1816
!= type_func(value)):
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1832
setattr(self, attrname, value)
1833
1834
return property(lambda self: getattr(self, attrname), setter)
1835
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1838
"ApprovalPending",
1839
type_func=bool)
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1842
"LastEnabled")
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1850
last_approval_request = notifychangeproperty(
1851
datetime_to_dbus, "LastApprovalRequest")
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1853
"ApprovedByDefault")
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1857
approval_duration = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
1860
host = notifychangeproperty(dbus.String, "Host")
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
extended_timeout = notifychangeproperty(
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
1874
del notifychangeproperty
1875
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
802
1876
803
def __del__(self, *args, **kwargs):
1877
804
try:
1878
805
self.remove_from_connection()
1881
808
if hasattr(DBusObjectWithProperties, "__del__"):
1882
809
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1883
810
Client.__del__(self, *args, **kwargs)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
811
812
def checker_callback(self, pid, condition, command,
813
*args, **kwargs):
814
self.checker_callback_tag = None
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
819
if os.WIFEXITED(condition):
820
exitstatus = os.WEXITSTATUS(condition)
1892
821
# Emit D-Bus signal
1893
822
self.CheckerCompleted(dbus.Int16(exitstatus),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
823
dbus.Int64(condition),
1896
824
dbus.String(command))
1897
825
else:
1898
826
# Emit D-Bus signal
1899
827
self.CheckerCompleted(dbus.Int16(-1),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
828
dbus.Int64(condition),
1904
829
dbus.String(command))
1905
return ret
1906
830
831
return Client.checker_callback(self, pid, condition, command,
832
*args, **kwargs)
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
850
1907
851
def start_checker(self, *args, **kwargs):
1908
old_checker_pid = getattr(self.checker, "pid", None)
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
1909
857
r = Client.start_checker(self, *args, **kwargs)
1910
858
# Only if new checker process was started
1911
859
if (self.checker is not None
1912
860
and old_checker_pid != self.checker.pid):
1913
861
# Emit D-Bus signal
1914
862
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
866
return r
867
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
1915
875
return r
1916
876
1917
877
def _reset_approved(self):
1918
self.approved = None
878
self._approved = None
1919
879
return False
1920
880
1921
881
def approve(self, value=True):
1922
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
882
self.send_changedstate()
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
888
889
## D-Bus methods, signals & properties
890
_interface = "se.bsnet.fukt.Mandos.Client"
891
892
## Signals
893
1933
894
# CheckerCompleted - signal
1934
895
@dbus.service.signal(_interface, signature="nxs")
1935
896
def CheckerCompleted(self, exitcode, waitstatus, command):
1936
897
"D-Bus signal"
1937
898
pass
1938
899
1939
900
# CheckerStarted - signal
1940
901
@dbus.service.signal(_interface, signature="s")
1941
902
def CheckerStarted(self, command):
1942
903
"D-Bus signal"
1943
904
pass
1944
905
1945
906
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
907
@dbus.service.signal(_interface, signature="sv")
1948
908
def PropertyChanged(self, property, value):
1949
909
"D-Bus signal"
1950
910
pass
1951
911
1952
912
# GotSecret - signal
1953
913
@dbus.service.signal(_interface)
1954
914
def GotSecret(self):
1957
917
server to mandos-client
1958
918
"""
1959
919
pass
1960
920
1961
921
# Rejected - signal
1962
922
@dbus.service.signal(_interface, signature="s")
1963
923
def Rejected(self, reason):
1964
924
"D-Bus signal"
1965
925
pass
1966
926
1967
927
# NeedApproval - signal
1968
928
@dbus.service.signal(_interface, signature="tb")
1969
929
def NeedApproval(self, timeout, default):
1970
930
"D-Bus signal"
1971
931
return self.need_approval()
1972
1973
# Methods
1974
932
933
## Methods
934
1975
935
# Approve - method
1976
936
@dbus.service.method(_interface, in_signature="b")
1977
937
def Approve(self, value):
1978
938
self.approve(value)
1979
939
1980
940
# CheckedOK - method
1981
941
@dbus.service.method(_interface)
1982
942
def CheckedOK(self):
1983
943
self.checked_ok()
1984
944
1985
945
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1987
946
@dbus.service.method(_interface)
1988
947
def Enable(self):
1989
948
"D-Bus method"
1990
949
self.enable()
1991
950
1992
951
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1994
952
@dbus.service.method(_interface)
1995
953
def StartChecker(self):
1996
954
"D-Bus method"
1997
955
self.start_checker()
1998
956
1999
957
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2001
958
@dbus.service.method(_interface)
2002
959
def Disable(self):
2003
960
"D-Bus method"
2004
961
self.disable()
2005
962
2006
963
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
964
@dbus.service.method(_interface)
2009
965
def StopChecker(self):
2010
966
self.stop_checker()
2011
2012
# Properties
2013
967
968
## Properties
969
2014
970
# ApprovalPending - property
2015
971
@dbus_service_property(_interface, signature="b", access="read")
2016
972
def ApprovalPending_dbus_property(self):
2017
973
return dbus.Boolean(bool(self.approvals_pending))
2018
974
2019
975
# ApprovedByDefault - property
2020
@dbus_service_property(_interface,
2021
signature="b",
976
@dbus_service_property(_interface, signature="b",
2022
977
access="readwrite")
2023
978
def ApprovedByDefault_dbus_property(self, value=None):
2024
979
if value is None: # get
2025
980
return dbus.Boolean(self.approved_by_default)
2026
981
self.approved_by_default = bool(value)
2027
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
985
2028
986
# ApprovalDelay - property
2029
@dbus_service_property(_interface,
2030
signature="t",
987
@dbus_service_property(_interface, signature="t",
2031
988
access="readwrite")
2032
989
def ApprovalDelay_dbus_property(self, value=None):
2033
990
if value is None: # get
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
991
return dbus.UInt64(self.approval_delay_milliseconds())
2036
992
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2037
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
996
2038
997
# ApprovalDuration - property
2039
@dbus_service_property(_interface,
2040
signature="t",
998
@dbus_service_property(_interface, signature="t",
2041
999
access="readwrite")
2042
1000
def ApprovalDuration_dbus_property(self, value=None):
2043
1001
if value is None: # get
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
2046
1004
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2047
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1008
2048
1009
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2051
1010
@dbus_service_property(_interface, signature="s", access="read")
2052
1011
def Name_dbus_property(self):
2053
1012
return dbus.String(self.name)
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1013
2062
1014
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2065
1015
@dbus_service_property(_interface, signature="s", access="read")
2066
1016
def Fingerprint_dbus_property(self):
2067
1017
return dbus.String(self.fingerprint)
2068
1018
2069
1019
# Host - property
2070
@dbus_service_property(_interface,
2071
signature="s",
1020
@dbus_service_property(_interface, signature="s",
2072
1021
access="readwrite")
2073
1022
def Host_dbus_property(self, value=None):
2074
1023
if value is None: # get
2075
1024
return dbus.String(self.host)
2076
self.host = str(value)
2077
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1029
2078
1030
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2081
1031
@dbus_service_property(_interface, signature="s", access="read")
2082
1032
def Created_dbus_property(self):
2083
return datetime_to_dbus(self.created)
2084
1033
return dbus.String(self._datetime_to_dbus(self.created))
1034
2085
1035
# LastEnabled - property
2086
1036
@dbus_service_property(_interface, signature="s", access="read")
2087
1037
def LastEnabled_dbus_property(self):
2088
return datetime_to_dbus(self.last_enabled)
2089
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1041
2090
1042
# Enabled - property
2091
@dbus_service_property(_interface,
2092
signature="b",
1043
@dbus_service_property(_interface, signature="b",
2093
1044
access="readwrite")
2094
1045
def Enabled_dbus_property(self, value=None):
2095
1046
if value is None: # get
2098
1049
self.enable()
2099
1050
else:
2100
1051
self.disable()
2101
1052
2102
1053
# LastCheckedOK - property
2103
@dbus_service_property(_interface,
2104
signature="s",
1054
@dbus_service_property(_interface, signature="s",
2105
1055
access="readwrite")
2106
1056
def LastCheckedOK_dbus_property(self, value=None):
2107
1057
if value is not None:
2108
1058
self.checked_ok()
2109
1059
return
2110
return datetime_to_dbus(self.last_checked_ok)
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
2117
# Expires - property
2118
@dbus_service_property(_interface, signature="s", access="read")
2119
def Expires_dbus_property(self):
2120
return datetime_to_dbus(self.expires)
2121
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
1064
2122
1065
# LastApprovalRequest - property
2123
1066
@dbus_service_property(_interface, signature="s", access="read")
2124
1067
def LastApprovalRequest_dbus_property(self):
2125
return datetime_to_dbus(self.last_approval_request)
2126
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
1073
2127
1074
# Timeout - property
2128
@dbus_service_property(_interface,
2129
signature="t",
1075
@dbus_service_property(_interface, signature="t",
2130
1076
access="readwrite")
2131
1077
def Timeout_dbus_property(self, value=None):
2132
1078
if value is None: # get
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1079
return dbus.UInt64(self.timeout_milliseconds())
2135
1080
self.timeout = datetime.timedelta(0, 0, 0, value)
2136
# Reschedule disabling
2137
if self.enabled:
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2142
self.disable()
2143
else:
2144
if (getattr(self, "disable_initiator_tag", None)
2145
is None):
2146
return
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
2151
2152
# ExtendedTimeout - property
2153
@dbus_service_property(_interface,
2154
signature="t",
2155
access="readwrite")
2156
def ExtendedTimeout_dbus_property(self, value=None):
2157
if value is None: # get
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2161
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
1101
2162
1102
# Interval - property
2163
@dbus_service_property(_interface,
2164
signature="t",
1103
@dbus_service_property(_interface, signature="t",
2165
1104
access="readwrite")
2166
1105
def Interval_dbus_property(self, value=None):
2167
1106
if value is None: # get
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2169
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
2170
1112
if getattr(self, "checker_initiator_tag", None) is None:
2171
1113
return
2172
if self.enabled:
2173
# Reschedule checker run
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
2178
1119
2179
1120
# Checker - property
2180
@dbus_service_property(_interface,
2181
signature="s",
1121
@dbus_service_property(_interface, signature="s",
2182
1122
access="readwrite")
2183
1123
def Checker_dbus_property(self, value=None):
2184
1124
if value is None: # get
2185
1125
return dbus.String(self.checker_command)
2186
self.checker_command = str(value)
2187
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
1131
2188
1132
# CheckerRunning - property
2189
@dbus_service_property(_interface,
2190
signature="b",
1133
@dbus_service_property(_interface, signature="b",
2191
1134
access="readwrite")
2192
1135
def CheckerRunning_dbus_property(self, value=None):
2193
1136
if value is None: # get
2196
1139
self.start_checker()
2197
1140
else:
2198
1141
self.stop_checker()
2199
1142
2200
1143
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
1144
@dbus_service_property(_interface, signature="o", access="read")
2205
1145
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1146
return self.dbus_object_path # is already a dbus.ObjectPath
1147
2208
1148
# Secret = property
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1149
@dbus_service_property(_interface, signature="ay",
1150
access="write", byte_arrays=True)
2216
1151
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
2218
1152
self.secret = str(value)
1153
2219
1154
del _interface
2220
1155
2221
1156
2222
1157
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1158
def __init__(self, child_pipe, fpr, address):
2224
1159
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
1160
self._pipe.send(('init', fpr, address))
2226
1161
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
1162
raise KeyError()
2228
1163
2229
1164
def __getattribute__(self, name):
2230
if name == '_pipe':
1165
if(name == '_pipe'):
2231
1166
return super(ProxyClient, self).__getattribute__(name)
2232
1167
self._pipe.send(('getattr', name))
2233
1168
data = self._pipe.recv()
2234
1169
if data[0] == 'data':
2235
1170
return data[1]
2236
1171
if data[0] == 'function':
2237
2238
1172
def func(*args, **kwargs):
2239
1173
self._pipe.send(('funcall', name, args, kwargs))
2240
1174
return self._pipe.recv()[1]
2241
2242
1175
return func
2243
1176
2244
1177
def __setattr__(self, name, value):
2245
if name == '_pipe':
1178
if(name == '_pipe'):
2246
1179
return super(ProxyClient, self).__setattr__(name, value)
2247
1180
self._pipe.send(('setattr', name, value))
2248
1181
2249
1182
2250
1183
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
1184
"""A class to handle client connections.
2252
1185
2253
1186
Instantiated once for each connection to handle it.
2254
1187
Note: This will run in its own forked process."""
2255
1188
2256
1189
def handle(self):
2257
1190
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
1191
logger.info("TCP connection from: %s",
2259
str(self.client_address))
1192
unicode(self.client_address))
2260
1193
logger.debug("Pipe FD: %d",
2261
1194
self.server.child_pipe.fileno())
2262
1195
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1196
session = (gnutls.connection
1197
.ClientSession(self.request,
1198
gnutls.connection
1199
.X509Credentials()))
1200
1201
# Note: gnutls.connection.X509Credentials is really a
1202
# generic GnuTLS certificate credentials object so long as
1203
# no X.509 keys are added to it. Therefore, we can use it
1204
# here despite using OpenPGP certificates.
1205
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1207
# "+AES-256-CBC", "+SHA1",
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1209
# "+DHE-DSS"))
2269
1210
# Use a fallback default, since this MUST be set.
2270
1211
priority = self.server.gnutls_priority
2271
1212
if priority is None:
2272
1213
priority = "NORMAL"
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
1214
(gnutls.library.functions
1215
.gnutls_priority_set_direct(session._c_object,
1216
priority, None))
2276
1217
2277
1218
# Start communication using the Mandos protocol
2278
1219
# Get protocol number
2280
1221
logger.debug("Protocol version: %r", line)
2281
1222
try:
2282
1223
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1224
raise RuntimeError
2284
1225
except (ValueError, IndexError, RuntimeError) as error:
2285
1226
logger.error("Unknown protocol version: %s", error)
2286
1227
return
2288
1229
# Start GnuTLS connection
2289
1230
try:
2290
1231
session.handshake()
2291
except gnutls.Error as error:
1232
except gnutls.errors.GNUTLSError as error:
2292
1233
logger.warning("Handshake failed: %s", error)
2293
1234
# Do not run session.bye() here: the session is not
2294
1235
# established. Just abandon the request.
2297
1238
2298
1239
approval_required = False
2299
1240
try:
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1241
try:
1242
fpr = self.fingerprint(self.peer_certificate
1243
(session))
1244
except (TypeError,
1245
gnutls.errors.GNUTLSError) as error:
1246
logger.warning("Bad certificate: %s", error)
1247
return
1248
logger.debug("Fingerprint: %s", fpr)
1249
1250
try:
1251
client = ProxyClient(child_pipe, fpr,
2322
1252
self.client_address)
2323
1253
except KeyError:
2324
1254
return
2325
1255
2326
1256
if client.approval_delay:
2327
1257
delay = client.approval_delay
2328
1258
client.approvals_pending += 1
2329
1259
approval_required = True
2330
1260
2331
1261
while True:
2332
1262
if not client.enabled:
2333
logger.info("Client %s is disabled",
2334
client.name)
1263
logger.warning("Client %s is disabled",
1264
client.name)
2335
1265
if self.server.use_dbus:
2336
1266
# Emit D-Bus signal
2337
client.Rejected("Disabled")
1267
client.Rejected("Disabled")
2338
1268
return
2339
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1269
1270
if client._approved or not client.approval_delay:
1271
#We are approved or approval is disabled
2342
1272
break
2343
elif client.approved is None:
1273
elif client._approved is None:
2344
1274
logger.info("Client %s needs approval",
2345
1275
client.name)
2346
1276
if self.server.use_dbus:
2347
1277
# Emit D-Bus signal
2348
1278
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
2351
1281
else:
2352
1282
logger.warning("Client %s was not approved",
2353
1283
client.name)
2355
1285
# Emit D-Bus signal
2356
1286
client.Rejected("Denied")
2357
1287
return
2358
2359
# wait until timeout or approved
1288
1289
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
2360
1291
time = datetime.datetime.now()
2361
1292
client.changedstate.acquire()
2362
client.changedstate.wait(delay.total_seconds())
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2363
1294
client.changedstate.release()
2364
1295
time2 = datetime.datetime.now()
2365
1296
if (time2 - time) >= delay:
2375
1306
break
2376
1307
else:
2377
1308
delay -= time2 - time
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
1309
1310
sent_size = 0
1311
while sent_size < len(client.secret):
1312
try:
1313
sent = session.send(client.secret[sent_size:])
1314
except gnutls.errors.GNUTLSError as error:
1315
logger.warning("gnutls send failed")
1316
return
1317
logger.debug("Sent: %d, remaining: %d",
1318
sent, len(client.secret)
1319
- (sent_size + sent))
1320
sent_size += sent
2385
1321
2386
1322
logger.info("Sending secret to %s", client.name)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1323
# bump the timeout as if seen
1324
client.checked_ok()
2389
1325
if self.server.use_dbus:
2390
1326
# Emit D-Bus signal
2391
1327
client.GotSecret()
2392
1328
2393
1329
finally:
2394
1330
if approval_required:
2395
1331
client.approvals_pending -= 1
2396
1332
try:
2397
1333
session.bye()
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1334
except gnutls.errors.GNUTLSError as error:
1335
logger.warning("GnuTLS bye failed")
1336
2402
1337
@staticmethod
2403
1338
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1339
"Return the peer's OpenPGP certificate as a bytestring"
1340
# If not an OpenPGP certificate...
1341
if (gnutls.library.functions
1342
.gnutls_certificate_type_get(session._c_object)
1343
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1344
# ...do the normal thing
1345
return session.peer_certificate
2420
1346
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1347
cert_list = (gnutls.library.functions
1348
.gnutls_certificate_get_peers
2422
1349
(session._c_object, ctypes.byref(list_size)))
2423
1350
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1351
raise gnutls.errors.GNUTLSError("error getting peer"
1352
" certificate")
2425
1353
if list_size.value == 0:
2426
1354
return None
2427
1355
cert = cert_list[0]
2428
1356
return ctypes.string_at(cert.data, cert.size)
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1357
2464
1358
@staticmethod
2465
1359
def fingerprint(openpgp):
2466
1360
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1361
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1362
datum = (gnutls.library.types
1363
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1364
ctypes.POINTER
1365
(ctypes.c_ubyte)),
1366
ctypes.c_uint(len(openpgp))))
2472
1367
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1368
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2475
1371
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1372
(gnutls.library.functions
1373
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1374
gnutls.library.constants
1375
.GNUTLS_OPENPGP_FMT_RAW))
2478
1376
# Verify the self signature in the key
2479
1377
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1378
(gnutls.library.functions
1379
.gnutls_openpgp_crt_verify_self(crt, 0,
1380
ctypes.byref(crtverify)))
2482
1381
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1382
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1383
raise (gnutls.errors.CertificateSecurityError
1384
("Verify failed"))
2486
1385
# New buffer for the fingerprint
2487
1386
buf = ctypes.create_string_buffer(20)
2488
1387
buf_len = ctypes.c_size_t()
2489
1388
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1389
(gnutls.library.functions
1390
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1391
ctypes.byref(buf_len)))
2492
1392
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1393
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1394
# Convert the buffer to a Python bytestring
2495
1395
fpr = ctypes.string_at(buf, buf_len.value)
2496
1396
# Convert the bytestring to hexadecimal notation
2497
hex_fpr = binascii.hexlify(fpr).upper()
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2498
1398
return hex_fpr
2499
1399
2500
1400
2501
1401
class MultiprocessingMixIn(object):
2502
1402
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
2504
1403
def sub_process_main(self, request, address):
2505
1404
try:
2506
1405
self.finish_request(request, address)
2507
except Exception:
1406
except:
2508
1407
self.handle_error(request, address)
2509
1408
self.close_request(request)
2510
1409
2511
1410
def process_request(self, request, address):
2512
1411
"""Start a new process to process the request."""
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2515
proc.start()
2516
return proc
2517
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
2518
1414
2519
1415
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2520
1416
""" adds a pipe to the MixIn """
2521
2522
1417
def process_request(self, request, client_address):
2523
1418
"""Overrides and wraps the original process_request().
2524
1419
2525
1420
This function creates a new pipe in self.pipe
2526
1421
"""
2527
1422
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2528
1423
2529
proc = MultiprocessingMixIn.process_request(self, request,
2530
client_address)
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
2531
1426
self.child_pipe.close()
2532
self.add_pipe(parent_pipe, proc)
1427
self.add_pipe(parent_pipe)
2533
1428
2534
def add_pipe(self, parent_pipe, proc):
1429
def add_pipe(self, parent_pipe):
2535
1430
"""Dummy function; override as necessary"""
2536
raise NotImplementedError()
2537
1431
raise NotImplementedError
2538
1432
2539
1433
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2540
1434
socketserver.TCPServer, object):
2541
1435
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2542
1436
2543
1437
Attributes:
2544
1438
enabled: Boolean; whether this server is activated yet
2545
1439
interface: None or a network interface name (string)
2546
1440
use_ipv6: Boolean; to use IPv6 or not
2547
1441
"""
2548
2549
1442
def __init__(self, server_address, RequestHandlerClass,
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1443
interface=None, use_ipv6=True):
2556
1444
self.interface = interface
2557
1445
if use_ipv6:
2558
1446
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
2586
1447
socketserver.TCPServer.__init__(self, server_address,
2587
1448
RequestHandlerClass)
2588
2589
1449
def server_bind(self):
2590
1450
"""This overrides the normal server_bind() function
2591
1451
to bind to an interface if one was specified, and also NOT to
2592
1452
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1453
if self.interface is not None:
2595
1454
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1455
logger.error("SO_BINDTODEVICE does not exist;"
1456
" cannot bind to interface %s",
1457
self.interface)
1458
else:
1459
try:
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1461
SO_BINDTODEVICE,
1462
str(self.interface
1463
+ '\0'))
1464
except socket.error as error:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1470
logger.error("SO_BINDTODEVICE not available;"
1471
" cannot bind to interface %s",
1472
self.interface)
1473
else:
1474
raise
2617
1475
# Only bind(2) the socket if we really need to.
2618
1476
if self.server_address[0] or self.server_address[1]:
2619
1477
if not self.server_address[0]:
2620
1478
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
1479
any_address = "::" # in6addr_any
2622
1480
else:
2623
any_address = "0.0.0.0" # INADDR_ANY
1481
any_address = socket.INADDR_ANY
2624
1482
self.server_address = (any_address,
2625
1483
self.server_address[1])
2626
1484
elif not self.server_address[1]:
2627
self.server_address = (self.server_address[0], 0)
1485
self.server_address = (self.server_address[0],
1486
0)
2628
1487
# if self.interface:
2629
1488
# self.server_address = (self.server_address[0],
2630
1489
# 0, # port
2636
1495
2637
1496
class MandosServer(IPv6_TCPServer):
2638
1497
"""Mandos server.
2639
1498
2640
1499
Attributes:
2641
1500
clients: set of Client objects
2642
1501
gnutls_priority GnuTLS priority string
2643
1502
use_dbus: Boolean; to emit D-Bus signals or not
2644
2645
Assumes a GLib.MainLoop event loop.
1503
1504
Assumes a gobject.MainLoop event loop.
2646
1505
"""
2647
2648
1506
def __init__(self, server_address, RequestHandlerClass,
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1507
interface=None, use_ipv6=True, clients=None,
1508
gnutls_priority=None, use_dbus=True):
2655
1509
self.enabled = False
2656
1510
self.clients = clients
2657
1511
if self.clients is None:
2658
self.clients = {}
1512
self.clients = set()
2659
1513
self.use_dbus = use_dbus
2660
1514
self.gnutls_priority = gnutls_priority
2661
1515
IPv6_TCPServer.__init__(self, server_address,
2662
1516
RequestHandlerClass,
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1517
interface = interface,
1518
use_ipv6 = use_ipv6)
2667
1519
def server_activate(self):
2668
1520
if self.enabled:
2669
1521
return socketserver.TCPServer.server_activate(self)
2670
2671
1522
def enable(self):
2672
1523
self.enabled = True
2673
2674
def add_pipe(self, parent_pipe, proc):
1524
def add_pipe(self, parent_pipe):
2675
1525
# Call "handle_ipc" for both data and EOF events
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
1526
gobject.io_add_watch(parent_pipe.fileno(),
1527
gobject.IO_IN | gobject.IO_HUP,
1528
functools.partial(self.handle_ipc,
1529
parent_pipe = parent_pipe))
1530
1531
def handle_ipc(self, source, condition, parent_pipe=None,
2686
1532
client_object=None):
2687
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2689
# Wait for other process to exit
2690
proc.join()
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2691
1549
return False
2692
1550
2693
1551
# Read a request from the child
2694
1552
request = parent_pipe.recv()
2695
1553
command = request[0]
2696
1554
2697
1555
if command == 'init':
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id and c.key_id == key_id:
2704
client = c
2705
break
2706
if fpr and c.fingerprint == fpr:
1556
fpr = request[1]
1557
address = request[2]
1558
1559
for c in self.clients:
1560
if c.fingerprint == fpr:
2707
1561
client = c
2708
1562
break
2709
1563
else:
2710
logger.info("Client not found for key ID: %s, address"
2711
": %s", key_id or fpr, address)
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
2712
1566
if self.use_dbus:
2713
1567
# Emit D-Bus signal
2714
mandos_dbus_service.ClientNotFound(key_id or fpr,
2715
address[0])
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
2716
1569
parent_pipe.send(False)
2717
1570
return False
2718
2719
GLib.io_add_watch(
2720
parent_pipe.fileno(),
2721
GLib.IO_IN | GLib.IO_HUP,
2722
functools.partial(self.handle_ipc,
2723
parent_pipe=parent_pipe,
2724
proc=proc,
2725
client_object=client))
1571
1572
gobject.io_add_watch(parent_pipe.fileno(),
1573
gobject.IO_IN | gobject.IO_HUP,
1574
functools.partial(self.handle_ipc,
1575
parent_pipe = parent_pipe,
1576
client_object = client))
2726
1577
parent_pipe.send(True)
2727
# remove the old hook in favor of the new above hook on
2728
# same fileno
1578
# remove the old hook in favor of the new above hook on same fileno
2729
1579
return False
2730
1580
if command == 'funcall':
2731
1581
funcname = request[1]
2732
1582
args = request[2]
2733
1583
kwargs = request[3]
2734
2735
parent_pipe.send(('data', getattr(client_object,
2736
funcname)(*args,
2737
**kwargs)))
1584
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2738
1586
2739
1587
if command == 'getattr':
2740
1588
attrname = request[1]
2741
if isinstance(client_object.__getattribute__(attrname),
2742
collections.Callable):
2743
parent_pipe.send(('function', ))
1589
if callable(client_object.__getattribute__(attrname)):
1590
parent_pipe.send(('function',))
2744
1591
else:
2745
parent_pipe.send((
2746
'data', client_object.__getattribute__(attrname)))
2747
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1593
2748
1594
if command == 'setattr':
2749
1595
attrname = request[1]
2750
1596
value = request[2]
2753
1599
return True
2754
1600
2755
1601
2756
def rfc3339_duration_to_delta(duration):
2757
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2758
2759
>>> rfc3339_duration_to_delta("P7D")
2760
datetime.timedelta(7)
2761
>>> rfc3339_duration_to_delta("PT60S")
2762
datetime.timedelta(0, 60)
2763
>>> rfc3339_duration_to_delta("PT60M")
2764
datetime.timedelta(0, 3600)
2765
>>> rfc3339_duration_to_delta("PT24H")
2766
datetime.timedelta(1)
2767
>>> rfc3339_duration_to_delta("P1W")
2768
datetime.timedelta(7)
2769
>>> rfc3339_duration_to_delta("PT5M30S")
2770
datetime.timedelta(0, 330)
2771
>>> rfc3339_duration_to_delta("P1DT3M20S")
2772
datetime.timedelta(1, 200)
2773
"""
2774
2775
# Parsing an RFC 3339 duration with regular expressions is not
2776
# possible - there would have to be multiple places for the same
2777
# values, like seconds. The current code, while more esoteric, is
2778
# cleaner without depending on a parsing library. If Python had a
2779
# built-in library for parsing we would use it, but we'd like to
2780
# avoid excessive use of external libraries.
2781
2782
# New type for defining tokens, syntax, and semantics all-in-one
2783
Token = collections.namedtuple("Token", (
2784
"regexp", # To match token; if "value" is not None, must have
2785
# a "group" containing digits
2786
"value", # datetime.timedelta or None
2787
"followers")) # Tokens valid after this token
2788
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2789
# the "duration" ABNF definition in RFC 3339, Appendix A.
2790
token_end = Token(re.compile(r"$"), None, frozenset())
2791
token_second = Token(re.compile(r"(\d+)S"),
2792
datetime.timedelta(seconds=1),
2793
frozenset((token_end, )))
2794
token_minute = Token(re.compile(r"(\d+)M"),
2795
datetime.timedelta(minutes=1),
2796
frozenset((token_second, token_end)))
2797
token_hour = Token(re.compile(r"(\d+)H"),
2798
datetime.timedelta(hours=1),
2799
frozenset((token_minute, token_end)))
2800
token_time = Token(re.compile(r"T"),
2801
None,
2802
frozenset((token_hour, token_minute,
2803
token_second)))
2804
token_day = Token(re.compile(r"(\d+)D"),
2805
datetime.timedelta(days=1),
2806
frozenset((token_time, token_end)))
2807
token_month = Token(re.compile(r"(\d+)M"),
2808
datetime.timedelta(weeks=4),
2809
frozenset((token_day, token_end)))
2810
token_year = Token(re.compile(r"(\d+)Y"),
2811
datetime.timedelta(weeks=52),
2812
frozenset((token_month, token_end)))
2813
token_week = Token(re.compile(r"(\d+)W"),
2814
datetime.timedelta(weeks=1),
2815
frozenset((token_end, )))
2816
token_duration = Token(re.compile(r"P"), None,
2817
frozenset((token_year, token_month,
2818
token_day, token_time,
2819
token_week)))
2820
# Define starting values:
2821
# Value so far
2822
value = datetime.timedelta()
2823
found_token = None
2824
# Following valid tokens
2825
followers = frozenset((token_duration, ))
2826
# String left to parse
2827
s = duration
2828
# Loop until end token is found
2829
while found_token is not token_end:
2830
# Search for any currently valid tokens
2831
for token in followers:
2832
match = token.regexp.match(s)
2833
if match is not None:
2834
# Token found
2835
if token.value is not None:
2836
# Value found, parse digits
2837
factor = int(match.group(1), 10)
2838
# Add to value so far
2839
value += factor * token.value
2840
# Strip token from string
2841
s = token.regexp.sub("", s, 1)
2842
# Go to found token
2843
found_token = token
2844
# Set valid next tokens
2845
followers = found_token.followers
2846
break
2847
else:
2848
# No currently valid tokens were found
2849
raise ValueError("Invalid RFC 3339 duration: {!r}"
2850
.format(duration))
2851
# End token found
2852
return value
2853
2854
2855
1602
def string_to_delta(interval):
2856
1603
"""Parse a string and return a datetime.timedelta
2857
1604
2858
1605
>>> string_to_delta('7d')
2859
1606
datetime.timedelta(7)
2860
1607
>>> string_to_delta('60s')
2868
1615
>>> string_to_delta('5m 30s')
2869
1616
datetime.timedelta(0, 330)
2870
1617
"""
2871
2872
try:
2873
return rfc3339_duration_to_delta(interval)
2874
except ValueError:
2875
pass
2876
2877
1618
timevalue = datetime.timedelta(0)
2878
1619
for s in interval.split():
2879
1620
try:
2880
suffix = s[-1]
1621
suffix = unicode(s[-1])
2881
1622
value = int(s[:-1])
2882
1623
if suffix == "d":
2883
1624
delta = datetime.timedelta(value)
2890
1631
elif suffix == "w":
2891
1632
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2892
1633
else:
2893
raise ValueError("Unknown suffix {!r}".format(suffix))
2894
except IndexError as e:
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
2895
1636
raise ValueError(*(e.args))
2896
1637
timevalue += delta
2897
1638
return timevalue
2898
1639
2899
1640
2900
def daemon(nochdir=False, noclose=False):
1641
def if_nametoindex(interface):
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
1645
global if_nametoindex
1646
try:
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1648
(ctypes.util.find_library("c"))
1649
.if_nametoindex)
1650
except (OSError, AttributeError):
1651
logger.warning("Doing if_nametoindex the hard way")
1652
def if_nametoindex(interface):
1653
"Get an interface index the hard way, i.e. using fcntl()"
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1655
with contextlib.closing(socket.socket()) as s:
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
1661
return interface_index
1662
return if_nametoindex(interface)
1663
1664
1665
def daemon(nochdir = False, noclose = False):
2901
1666
"""See daemon(3). Standard BSD Unix function.
2902
1667
2903
1668
This should really exist as os.daemon, but it doesn't (yet)."""
2904
1669
if os.fork():
2905
1670
sys.exit()
2910
1675
sys.exit()
2911
1676
if not noclose:
2912
1677
# Close all standard open file descriptors
2913
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2914
1679
if not stat.S_ISCHR(os.fstat(null).st_mode):
2915
1680
raise OSError(errno.ENODEV,
2916
"{} not a character device"
2917
.format(os.devnull))
1681
"%s not a character device"
1682
% os.path.devnull)
2918
1683
os.dup2(null, sys.stdin.fileno())
2919
1684
os.dup2(null, sys.stdout.fileno())
2920
1685
os.dup2(null, sys.stderr.fileno())
2923
1688
2924
1689
2925
1690
def main():
2926
1691
2927
1692
##################################################################
2928
1693
# Parsing of options, both command line and config file
2929
1694
2930
1695
parser = argparse.ArgumentParser()
2931
1696
parser.add_argument("-v", "--version", action="version",
2932
version="%(prog)s {}".format(version),
1697
version = "%%(prog)s %s" % version,
2933
1698
help="show version number and exit")
2934
1699
parser.add_argument("-i", "--interface", metavar="IF",
2935
1700
help="Bind to interface IF")
2941
1706
help="Run self-test")
2942
1707
parser.add_argument("--debug", action="store_true",
2943
1708
help="Debug mode; run in foreground and log"
2944
" to terminal", default=None)
1709
" to terminal")
2945
1710
parser.add_argument("--debuglevel", metavar="LEVEL",
2946
1711
help="Debug level for stdout output")
2947
1712
parser.add_argument("--priority", help="GnuTLS"
2954
1719
" files")
2955
1720
parser.add_argument("--no-dbus", action="store_false",
2956
1721
dest="use_dbus", help="Do not provide D-Bus"
2957
" system bus interface", default=None)
1722
" system bus interface")
2958
1723
parser.add_argument("--no-ipv6", action="store_false",
2959
dest="use_ipv6", help="Do not use IPv6",
2960
default=None)
2961
parser.add_argument("--no-restore", action="store_false",
2962
dest="restore", help="Do not restore stored"
2963
" state", default=None)
2964
parser.add_argument("--socket", type=int,
2965
help="Specify a file descriptor to a network"
2966
" socket to use instead of creating one")
2967
parser.add_argument("--statedir", metavar="DIR",
2968
help="Directory to save/restore state in")
2969
parser.add_argument("--foreground", action="store_true",
2970
help="Run in foreground", default=None)
2971
parser.add_argument("--no-zeroconf", action="store_false",
2972
dest="zeroconf", help="Do not use Zeroconf",
2973
default=None)
2974
1724
dest="use_ipv6", help="Do not use IPv6")
2975
1725
options = parser.parse_args()
2976
1726
2977
1727
if options.check:
2978
1728
import doctest
2979
fail_count, test_count = doctest.testmod()
2980
sys.exit(os.EX_OK if fail_count == 0 else 1)
2981
1729
doctest.testmod()
1730
sys.exit()
1731
2982
1732
# Default values for config file for server-global settings
2983
if gnutls.has_rawpk:
2984
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2985
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2986
else:
2987
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2988
":+SIGN-DSA-SHA256")
2989
server_defaults = {"interface": "",
2990
"address": "",
2991
"port": "",
2992
"debug": "False",
2993
"priority": priority,
2994
"servicename": "Mandos",
2995
"use_dbus": "True",
2996
"use_ipv6": "True",
2997
"debuglevel": "",
2998
"restore": "True",
2999
"socket": "",
3000
"statedir": "/var/lib/mandos",
3001
"foreground": "False",
3002
"zeroconf": "True",
3003
}
3004
del priority
3005
1733
server_defaults = { "interface": "",
1734
"address": "",
1735
"port": "",
1736
"debug": "False",
1737
"priority":
1738
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1739
"servicename": "Mandos",
1740
"use_dbus": "True",
1741
"use_ipv6": "True",
1742
"debuglevel": "",
1743
}
1744
3006
1745
# Parse config file for server-global settings
3007
1746
server_config = configparser.SafeConfigParser(server_defaults)
3008
1747
del server_defaults
3009
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1748
server_config.read(os.path.join(options.configdir,
1749
"mandos.conf"))
3010
1750
# Convert the SafeConfigParser object to a dict
3011
1751
server_settings = server_config.defaults()
3012
1752
# Use the appropriate methods on the non-string config options
3013
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3014
"foreground", "zeroconf"):
1753
for option in ("debug", "use_dbus", "use_ipv6"):
3015
1754
server_settings[option] = server_config.getboolean("DEFAULT",
3016
1755
option)
3017
1756
if server_settings["port"]:
3018
1757
server_settings["port"] = server_config.getint("DEFAULT",
3019
1758
"port")
3020
if server_settings["socket"]:
3021
server_settings["socket"] = server_config.getint("DEFAULT",
3022
"socket")
3023
# Later, stdin will, and stdout and stderr might, be dup'ed
3024
# over with an opened os.devnull. But we don't want this to
3025
# happen with a supplied network socket.
3026
if 0 <= server_settings["socket"] <= 2:
3027
server_settings["socket"] = os.dup(server_settings
3028
["socket"])
3029
1759
del server_config
3030
1760
3031
1761
# Override the settings from the config file with command line
3032
1762
# options, if set.
3033
1763
for option in ("interface", "address", "port", "debug",
3034
"priority", "servicename", "configdir", "use_dbus",
3035
"use_ipv6", "debuglevel", "restore", "statedir",
3036
"socket", "foreground", "zeroconf"):
1764
"priority", "servicename", "configdir",
1765
"use_dbus", "use_ipv6", "debuglevel"):
3037
1766
value = getattr(options, option)
3038
1767
if value is not None:
3039
1768
server_settings[option] = value
3040
1769
del options
3041
1770
# Force all strings to be unicode
3042
1771
for option in server_settings.keys():
3043
if isinstance(server_settings[option], bytes):
3044
server_settings[option] = (server_settings[option]
3045
.decode("utf-8"))
3046
# Force all boolean options to be boolean
3047
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3048
"foreground", "zeroconf"):
3049
server_settings[option] = bool(server_settings[option])
3050
# Debug implies foreground
3051
if server_settings["debug"]:
3052
server_settings["foreground"] = True
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
3053
1774
# Now we have our good server settings in "server_settings"
3054
1775
3055
1776
##################################################################
3056
3057
if (not server_settings["zeroconf"]
3058
and not (server_settings["port"]
3059
or server_settings["socket"] != "")):
3060
parser.error("Needs port or socket to work without Zeroconf")
3061
1777
3062
1778
# For convenience
3063
1779
debug = server_settings["debug"]
3064
1780
debuglevel = server_settings["debuglevel"]
3065
1781
use_dbus = server_settings["use_dbus"]
3066
1782
use_ipv6 = server_settings["use_ipv6"]
3067
stored_state_path = os.path.join(server_settings["statedir"],
3068
stored_state_file)
3069
foreground = server_settings["foreground"]
3070
zeroconf = server_settings["zeroconf"]
3071
3072
if debug:
3073
initlogger(debug, logging.DEBUG)
3074
else:
3075
if not debuglevel:
3076
initlogger(debug)
3077
else:
3078
level = getattr(logging, debuglevel.upper())
3079
initlogger(debug, level)
3080
1783
3081
1784
if server_settings["servicename"] != "Mandos":
3082
syslogger.setFormatter(
3083
logging.Formatter('Mandos ({}) [%(process)d]:'
3084
' %(levelname)s: %(message)s'.format(
3085
server_settings["servicename"])))
3086
1785
syslogger.setFormatter(logging.Formatter
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1788
% server_settings["servicename"]))
1789
3087
1790
# Parse config file with clients
3088
client_config = configparser.SafeConfigParser(Client
3089
.client_defaults)
1791
client_defaults = { "timeout": "1h",
1792
"interval": "5m",
1793
"checker": "fping -q -- %%(host)s",
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1797
}
1798
client_config = configparser.SafeConfigParser(client_defaults)
3090
1799
client_config.read(os.path.join(server_settings["configdir"],
3091
1800
"clients.conf"))
3092
1801
3093
1802
global mandos_dbus_service
3094
1803
mandos_dbus_service = None
3095
3096
socketfd = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3101
ClientHandler,
3102
interface=(server_settings["interface"] or None),
3103
use_ipv6=use_ipv6,
3104
gnutls_priority=server_settings["priority"],
3105
use_dbus=use_dbus,
3106
socketfd=socketfd)
3107
if not foreground:
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3111
pidfile = None
3112
try:
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3116
exc_info=e)
3117
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3121
try:
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
3124
break
1804
1805
tcp_server = MandosServer((server_settings["address"],
1806
server_settings["port"]),
1807
ClientHandler,
1808
interface=(server_settings["interface"]
1809
or None),
1810
use_ipv6=use_ipv6,
1811
gnutls_priority=
1812
server_settings["priority"],
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
1816
try:
1817
pidfile = open(pidfilename, "w")
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
1820
1821
try:
1822
uid = pwd.getpwnam("_mandos").pw_uid
1823
gid = pwd.getpwnam("_mandos").pw_gid
1824
except KeyError:
1825
try:
1826
uid = pwd.getpwnam("mandos").pw_uid
1827
gid = pwd.getpwnam("mandos").pw_gid
3125
1828
except KeyError:
3126
continue
3127
else:
3128
uid = 65534
3129
gid = 65534
1829
try:
1830
uid = pwd.getpwnam("nobody").pw_uid
1831
gid = pwd.getpwnam("nobody").pw_gid
1832
except KeyError:
1833
uid = 65534
1834
gid = 65534
3130
1835
try:
3131
1836
os.setgid(gid)
3132
1837
os.setuid(uid)
3133
if debug:
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3135
gid))
3136
1838
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
3140
raise
1839
if error[0] != errno.EPERM:
1840
raise error
1841
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
3141
1849
3142
1850
if debug:
3143
1851
# Enable all possible GnuTLS debugging
3144
1852
3145
1853
# "Use a log level over 10 to enable all debugging options."
3146
1854
# - GnuTLS manual
3147
gnutls.global_set_log_level(11)
3148
3149
@gnutls.log_func
1855
gnutls.library.functions.gnutls_global_set_log_level(11)
1856
1857
@gnutls.library.types.gnutls_log_func
3150
1858
def debug_gnutls(level, string):
3151
1859
logger.debug("GnuTLS: %s", string[:-1])
3152
3153
gnutls.global_set_log_function(debug_gnutls)
3154
1860
1861
(gnutls.library.functions
1862
.gnutls_global_set_log_function(debug_gnutls))
1863
3155
1864
# Redirect stdin so all checkers get /dev/null
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
1866
os.dup2(null, sys.stdin.fileno())
3158
1867
if null > 2:
3159
1868
os.close(null)
3160
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
1872
3161
1873
# Need to fork before connecting to D-Bus
3162
if not foreground:
1874
if not debug:
3163
1875
# Close all input and output, do double fork, etc.
3164
1876
daemon()
3165
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
3168
GLib.threads_init()
3169
1877
3170
1878
global main_loop
3171
1879
# From the Avahi example code
3172
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
1880
DBusGMainLoop(set_as_default=True )
1881
main_loop = gobject.MainLoop()
3174
1882
bus = dbus.SystemBus()
3175
1883
# End of Avahi example code
3176
1884
if use_dbus:
3177
1885
try:
3178
bus_name = dbus.service.BusName("se.recompile.Mandos",
3179
bus,
3180
do_not_queue=True)
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3183
do_not_queue=True)
3184
except dbus.exceptions.DBusException as e:
3185
logger.error("Disabling D-Bus:", exc_info=e)
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1887
bus, do_not_queue=True)
1888
except dbus.exceptions.NameExistsException as e:
1889
logger.error(unicode(e) + ", disabling D-Bus")
3186
1890
use_dbus = False
3187
1891
server_settings["use_dbus"] = False
3188
1892
tcp_server.use_dbus = False
3189
if zeroconf:
3190
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
3194
protocol=protocol,
3195
bus=bus)
3196
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
server_settings["interface"].encode("utf-8"))
3199
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
1900
3200
1901
global multiprocessing_manager
3201
1902
multiprocessing_manager = multiprocessing.Manager()
3202
1903
3203
1904
client_class = Client
3204
1905
if use_dbus:
3205
client_class = functools.partial(ClientDBus, bus=bus)
3206
3207
client_settings = Client.config_parser(client_config)
3208
old_client_settings = {}
3209
clients_data = {}
3210
3211
# This is used to redirect stdout and stderr for checker processes
3212
global wnull
3213
wnull = open(os.devnull, "w") # A writable /dev/null
3214
# Only used if server is running in foreground but not in debug
3215
# mode
3216
if debug or not foreground:
3217
wnull.close()
3218
3219
# Get client data and settings from last running state.
3220
if server_settings["restore"]:
3221
try:
3222
with open(stored_state_path, "rb") as stored_state:
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3225
stored_state)
3226
else:
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3230
# clients_data
3231
# .keys()
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3234
else key): value
3235
for key, value in
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3241
for k, v in
3242
clients_data[key].items()}
3243
clients_data[key] = value
3244
# .client_structure
3245
value["client_structure"] = [
3246
(s.decode("utf-8")
3247
if isinstance(s, bytes)
3248
else s) for s in
3249
value["client_structure"]]
3250
# .name & .host
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3259
# .keys()
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3263
else key): value
3264
for key, value in
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3267
# .host
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
3271
.decode("utf-8"))
3272
os.remove(stored_state_path)
3273
except IOError as e:
3274
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
3277
else:
3278
logger.critical("Could not load persistent state:",
3279
exc_info=e)
3280
raise
3281
except EOFError as e:
3282
logger.warning("Could not load persistent state: "
3283
"EOFError:",
3284
exc_info=e)
3285
3286
with PGPEngine() as pgp:
3287
for client_name, client in clients_data.items():
3288
# Skip removed clients
3289
if client_name not in client_settings:
3290
continue
3291
3292
# Decide which value to use after restoring saved state.
3293
# We have three different values: Old config file,
3294
# new config file, and saved state.
3295
# New config value takes precedence if it differs from old
3296
# config value, otherwise use saved state.
3297
for name, value in client_settings[client_name].items():
3298
try:
3299
# For each value in new config, check if it
3300
# differs from the old config value (Except for
3301
# the "secret" attribute)
3302
if (name != "secret"
3303
and (value !=
3304
old_client_settings[client_name][name])):
3305
client[name] = value
3306
except KeyError:
3307
pass
3308
3309
# Clients who has passed its expire date can still be
3310
# enabled if its last checker was successful. A Client
3311
# whose checker succeeded before we stored its state is
3312
# assumed to have successfully run all checkers during
3313
# downtime.
3314
if client["enabled"]:
3315
if datetime.datetime.utcnow() >= client["expires"]:
3316
if not client["last_checked_ok"]:
3317
logger.warning(
3318
"disabling client {} - Client never "
3319
"performed a successful checker".format(
3320
client_name))
3321
client["enabled"] = False
3322
elif client["last_checker_status"] != 0:
3323
logger.warning(
3324
"disabling client {} - Client last"
3325
" checker failed with error code"
3326
" {}".format(
3327
client_name,
3328
client["last_checker_status"]))
3329
client["enabled"] = False
3330
else:
3331
client["expires"] = (
3332
datetime.datetime.utcnow()
3333
+ client["timeout"])
3334
logger.debug("Last checker succeeded,"
3335
" keeping {} enabled".format(
3336
client_name))
1906
client_class = functools.partial(ClientDBus, bus = bus)
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
3337
1914
try:
3338
client["secret"] = pgp.decrypt(
3339
client["encrypted_secret"],
3340
client_settings[client_name]["secret"])
3341
except PGPError:
3342
# If decryption fails, we use secret from new settings
3343
logger.debug("Failed to decrypt {} old secret".format(
3344
client_name))
3345
client["secret"] = (client_settings[client_name]
3346
["secret"])
3347
3348
# Add/remove clients based on new changes made to config
3349
for client_name in (set(old_client_settings)
3350
- set(client_settings)):
3351
del clients_data[client_name]
3352
for client_name in (set(client_settings)
3353
- set(old_client_settings)):
3354
clients_data[client_name] = client_settings[client_name]
3355
3356
# Create all client objects
3357
for client_name, client in clients_data.items():
3358
tcp_server.clients[client_name] = client_class(
3359
name=client_name,
3360
settings=client,
3361
server_settings=server_settings)
3362
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
3363
1924
if not tcp_server.clients:
3364
1925
logger.warning("No clients defined")
3365
3366
if not foreground:
3367
if pidfile is not None:
3368
pid = os.getpid()
3369
try:
3370
with pidfile:
3371
print(pid, file=pidfile)
3372
except IOError:
3373
logger.error("Could not write to file %r with PID %d",
3374
pidfilename, pid)
3375
del pidfile
1926
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
3376
1939
del pidfilename
3377
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
lambda: main_loop.quit() and False)
3381
1940
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1945
3382
1946
if use_dbus:
3383
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
1947
class MandosDBusService(dbus.service.Object):
3387
1948
"""A D-Bus proxy object"""
3388
3389
1949
def __init__(self):
3390
1950
dbus.service.Object.__init__(self, bus, "/")
3391
3392
_interface = "se.recompile.Mandos"
3393
1951
_interface = "se.bsnet.fukt.Mandos"
1952
3394
1953
@dbus.service.signal(_interface, signature="o")
3395
1954
def ClientAdded(self, objpath):
3396
1955
"D-Bus signal"
3397
1956
pass
3398
1957
3399
1958
@dbus.service.signal(_interface, signature="ss")
3400
def ClientNotFound(self, key_id, address):
1959
def ClientNotFound(self, fingerprint, address):
3401
1960
"D-Bus signal"
3402
1961
pass
3403
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3405
"true"})
1962
3406
1963
@dbus.service.signal(_interface, signature="os")
3407
1964
def ClientRemoved(self, objpath, name):
3408
1965
"D-Bus signal"
3409
1966
pass
3410
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3412
"true"})
1967
3413
1968
@dbus.service.method(_interface, out_signature="ao")
3414
1969
def GetAllClients(self):
3415
1970
"D-Bus method"
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3418
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3420
"true"})
1971
return dbus.Array(c.dbus_object_path
1972
for c in tcp_server.clients)
1973
3421
1974
@dbus.service.method(_interface,
3422
1975
out_signature="a{oa{sv}}")
3423
1976
def GetAllClientsWithProperties(self):
3424
1977
"D-Bus method"
3425
1978
return dbus.Dictionary(
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
3429
1981
signature="oa{sv}")
3430
1982
3431
1983
@dbus.service.method(_interface, in_signature="o")
3432
1984
def RemoveClient(self, object_path):
3433
1985
"D-Bus method"
3434
for c in tcp_server.clients.values():
1986
for c in tcp_server.clients:
3435
1987
if c.dbus_object_path == object_path:
3436
del tcp_server.clients[c.name]
1988
tcp_server.clients.remove(c)
3437
1989
c.remove_from_connection()
3438
# Don't signal the disabling
1990
# Don't signal anything except ClientRemoved
3439
1991
c.disable(quiet=True)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
1992
# Emit D-Bus signal
1993
self.ClientRemoved(object_path, c.name)
3442
1994
return
3443
1995
raise KeyError(object_path)
3444
1996
3445
1997
del _interface
3446
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3450
"""D-Bus method"""
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3453
dbus.Dictionary(
3454
{interface: client.GetAll(interface)
3455
for interface in
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3458
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3461
if use_dbus:
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3465
dbus.Dictionary(
3466
{interface: client.GetAll(interface)
3467
for interface in
3468
client._get_all_interface_names()}))
3469
# Old signal
3470
self.ClientAdded(client.dbus_object_path)
3471
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3474
if use_dbus:
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3479
# Old signal
3480
self.ClientRemoved(client.dbus_object_path,
3481
client.name)
3482
1998
3483
1999
mandos_dbus_service = MandosDBusService()
3484
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
3488
wn = wnull
3489
2000
3490
2001
def cleanup():
3491
2002
"Cleanup function; run on exit"
3492
if zeroconf:
3493
service.cleanup()
3494
3495
mp.active_children()
3496
wn.close()
3497
if not (tcp_server.clients or client_settings):
3498
return
3499
3500
# Store client before exiting. Secrets are encrypted with key
3501
# based on what config file has. If config file is
3502
# removed/edited, old secret will thus be unrecovable.
3503
clients = {}
3504
with PGPEngine() as pgp:
3505
for client in tcp_server.clients.values():
3506
key = client_settings[client.name]["secret"]
3507
client.encrypted_secret = pgp.encrypt(client.secret,
3508
key)
3509
client_dict = {}
3510
3511
# A list of attributes that can not be pickled
3512
# + secret.
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
for name, typ in inspect.getmembers(dbus.service
3516
.Object):
3517
exclude.add(name)
3518
3519
client_dict["encrypted_secret"] = (client
3520
.encrypted_secret)
3521
for attr in client.client_structure:
3522
if attr not in exclude:
3523
client_dict[attr] = getattr(client, attr)
3524
3525
clients[client.name] = client_dict
3526
del client_settings[client.name]["secret"]
3527
3528
try:
3529
with tempfile.NamedTemporaryFile(
3530
mode='wb',
3531
suffix=".pickle",
3532
prefix='clients-',
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3536
protocol=2)
3537
tempname = stored_state.name
3538
os.rename(tempname, stored_state_path)
3539
except (IOError, OSError) as e:
3540
if not debug:
3541
try:
3542
os.remove(tempname)
3543
except NameError:
3544
pass
3545
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3546
logger.warning("Could not save persistent state: {}"
3547
.format(os.strerror(e.errno)))
3548
else:
3549
logger.warning("Could not save persistent state:",
3550
exc_info=e)
3551
raise
3552
3553
# Delete all clients, and settings from config
2003
service.cleanup()
2004
3554
2005
while tcp_server.clients:
3555
name, client = tcp_server.clients.popitem()
2006
client = tcp_server.clients.pop()
3556
2007
if use_dbus:
3557
2008
client.remove_from_connection()
3558
# Don't signal the disabling
2009
client.disable_hook = None
2010
# Don't signal anything except ClientRemoved
3559
2011
client.disable(quiet=True)
3560
# Emit D-Bus signal for removal
3561
2012
if use_dbus:
3562
mandos_dbus_service.client_removed_signal(client)
3563
client_settings.clear()
3564
2013
# Emit D-Bus signal
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2015
client.name)
2016
3565
2017
atexit.register(cleanup)
3566
3567
for client in tcp_server.clients.values():
2018
2019
for client in tcp_server.clients:
3568
2020
if use_dbus:
3569
# Emit D-Bus signal for adding
3570
mandos_dbus_service.client_added_signal(client)
3571
# Need to initiate checking of clients
3572
if client.enabled:
3573
client.init_checker()
3574
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2023
client.enable()
2024
3575
2025
tcp_server.enable()
3576
2026
tcp_server.server_activate()
3577
2027
3578
2028
# Find out what port we got
3579
if zeroconf:
3580
service.port = tcp_server.socket.getsockname()[1]
2029
service.port = tcp_server.socket.getsockname()[1]
3581
2030
if use_ipv6:
3582
2031
logger.info("Now listening on address %r, port %d,"
3583
" flowinfo %d, scope_id %d",
3584
*tcp_server.socket.getsockname())
2032
" flowinfo %d, scope_id %d"
2033
% tcp_server.socket.getsockname())
3585
2034
else: # IPv4
3586
logger.info("Now listening on address %r, port %d",
3587
*tcp_server.socket.getsockname())
3588
3589
# service.interface = tcp_server.socket.getsockname()[3]
3590
2035
logger.info("Now listening on address %r, port %d"
2036
% tcp_server.socket.getsockname())
2037
2038
#service.interface = tcp_server.socket.getsockname()[3]
2039
3591
2040
try:
3592
if zeroconf:
3593
# From the Avahi example code
3594
try:
3595
service.activate()
3596
except dbus.exceptions.DBusException as error:
3597
logger.critical("D-Bus Exception", exc_info=error)
3598
cleanup()
3599
sys.exit(1)
3600
# End of Avahi example code
3601
3602
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3603
lambda *args, **kwargs:
3604
(tcp_server.handle_request
3605
(*args[2:], **kwargs) or True))
3606
2041
# From the Avahi example code
2042
try:
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
2047
sys.exit(1)
2048
# End of Avahi example code
2049
2050
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2051
lambda *args, **kwargs:
2052
(tcp_server.handle_request
2053
(*args[2:], **kwargs) or True))
2054
3607
2055
logger.debug("Starting main loop")
3608
2056
main_loop.run()
3609
2057
except AvahiError as error:
3610
logger.critical("Avahi Error", exc_info=error)
2058
logger.critical("AvahiError: %s", error)
3611
2059
cleanup()
3612
2060
sys.exit(1)
3613
2061
except KeyboardInterrupt:
3618
2066
# Must run before the D-Bus bus name gets deregistered
3619
2067
cleanup()
3620
2068
3621
3622
2069
if __name__ == '__main__':
3623
2070
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0