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- Committer: teddy at recompile
- Date: 2019-12-05 03:38:07 UTC
- Revision ID: teddy@recompile.se-20191205033807-6awt45zpgp194vl1
From: Frans Spiesschaert <Frans.Spiesschaert@yucom.be>
Add Dutch debconf translation
* debian/po/nl.po: New.
Acked-by: Teddy Hogeborn <teddy@recompile.se>
Add Dutch debconf translation
* debian/po/nl.po: New.
Acked-by: Teddy Hogeborn <teddy@recompile.se>
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
1
#!/usr/bin/python3 -bI
2
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
34
35
from __future__ import (division, absolute_import, print_function,
36
unicode_literals)
37
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
47
import socket
38
import optparse
48
import argparse
39
49
import datetime
40
50
import errno
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
48
55
import sys
49
56
import re
50
57
import os
51
58
import signal
52
from sets import Set
53
59
import subprocess
54
60
import atexit
55
61
import stat
56
62
import logging
57
63
import logging.handlers
58
64
import pwd
59
from contextlib import closing
65
import contextlib
66
import struct
67
import fcntl
68
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
import unittest
60
81
61
82
import dbus
62
83
import dbus.service
63
import gobject
64
import avahi
84
import gi
85
from gi.repository import GLib
65
86
from dbus.mainloop.glib import DBusGMainLoop
66
87
import ctypes
67
88
import ctypes.util
68
69
version = "1.0.6"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
89
import xml.dom.minidom
90
import inspect
91
92
if sys.version_info.major == 2:
93
__metaclass__ = type
94
str = unicode
95
96
# Show warnings by default
97
if not sys.warnoptions:
98
import warnings
99
warnings.simplefilter("default")
100
101
# Try to find the value of SO_BINDTODEVICE:
102
try:
103
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
104
# newer, and it is also the most natural place for it:
105
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
106
except AttributeError:
107
try:
108
# This is where SO_BINDTODEVICE was up to and including Python
109
# 2.6, and also 3.2:
110
from IN import SO_BINDTODEVICE
111
except ImportError:
112
# In Python 2.7 it seems to have been removed entirely.
113
# Try running the C preprocessor:
114
try:
115
cc = subprocess.Popen(["cc", "--language=c", "-E",
116
"/dev/stdin"],
117
stdin=subprocess.PIPE,
118
stdout=subprocess.PIPE)
119
stdout = cc.communicate(
120
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
121
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
122
except (OSError, ValueError, IndexError):
123
# No value found
124
SO_BINDTODEVICE = None
125
126
if sys.version_info < (3, 2):
127
configparser.Configparser = configparser.SafeConfigParser
128
129
version = "1.8.9"
130
stored_state_file = "clients.pickle"
131
132
logger = logging.getLogger()
133
logging.captureWarnings(True) # Show warnings via the logging system
134
syslogger = None
135
136
try:
137
if_nametoindex = ctypes.cdll.LoadLibrary(
138
ctypes.util.find_library("c")).if_nametoindex
139
except (OSError, AttributeError):
140
141
def if_nametoindex(interface):
142
"Get an interface index the hard way, i.e. using fcntl()"
143
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
144
with contextlib.closing(socket.socket()) as s:
145
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
146
struct.pack(b"16s16x", interface))
147
interface_index = struct.unpack("I", ifreq[16:20])[0]
148
return interface_index
149
150
151
def copy_function(func):
152
"""Make a copy of a function"""
153
if sys.version_info.major == 2:
154
return types.FunctionType(func.func_code,
155
func.func_globals,
156
func.func_name,
157
func.func_defaults,
158
func.func_closure)
159
else:
160
return types.FunctionType(func.__code__,
161
func.__globals__,
162
func.__name__,
163
func.__defaults__,
164
func.__closure__)
165
166
167
def initlogger(debug, level=logging.WARNING):
168
"""init logger and add loglevel"""
169
170
global syslogger
171
syslogger = (logging.handlers.SysLogHandler(
172
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
173
address="/dev/log"))
174
syslogger.setFormatter(logging.Formatter
175
('Mandos [%(process)d]: %(levelname)s:'
176
' %(message)s'))
177
logger.addHandler(syslogger)
178
179
if debug:
180
console = logging.StreamHandler()
181
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
182
' [%(process)d]:'
183
' %(levelname)s:'
184
' %(message)s'))
185
logger.addHandler(console)
186
logger.setLevel(level)
187
188
189
class PGPError(Exception):
190
"""Exception if encryption/decryption fails"""
191
pass
192
193
194
class PGPEngine:
195
"""A simple class for OpenPGP symmetric encryption & decryption"""
196
197
def __init__(self):
198
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
199
self.gpg = "gpg"
200
try:
201
output = subprocess.check_output(["gpgconf"])
202
for line in output.splitlines():
203
name, text, path = line.split(b":")
204
if name == b"gpg":
205
self.gpg = path
206
break
207
except OSError as e:
208
if e.errno != errno.ENOENT:
209
raise
210
self.gnupgargs = ['--batch',
211
'--homedir', self.tempdir,
212
'--force-mdc',
213
'--quiet']
214
# Only GPG version 1 has the --no-use-agent option.
215
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
216
self.gnupgargs.append("--no-use-agent")
217
218
def __enter__(self):
219
return self
220
221
def __exit__(self, exc_type, exc_value, traceback):
222
self._cleanup()
223
return False
224
225
def __del__(self):
226
self._cleanup()
227
228
def _cleanup(self):
229
if self.tempdir is not None:
230
# Delete contents of tempdir
231
for root, dirs, files in os.walk(self.tempdir,
232
topdown=False):
233
for filename in files:
234
os.remove(os.path.join(root, filename))
235
for dirname in dirs:
236
os.rmdir(os.path.join(root, dirname))
237
# Remove tempdir
238
os.rmdir(self.tempdir)
239
self.tempdir = None
240
241
def password_encode(self, password):
242
# Passphrase can not be empty and can not contain newlines or
243
# NUL bytes. So we prefix it and hex encode it.
244
encoded = b"mandos" + binascii.hexlify(password)
245
if len(encoded) > 2048:
246
# GnuPG can't handle long passwords, so encode differently
247
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
248
.replace(b"\n", b"\\n")
249
.replace(b"\0", b"\\x00"))
250
return encoded
251
252
def encrypt(self, data, password):
253
passphrase = self.password_encode(password)
254
with tempfile.NamedTemporaryFile(
255
dir=self.tempdir) as passfile:
256
passfile.write(passphrase)
257
passfile.flush()
258
proc = subprocess.Popen([self.gpg, '--symmetric',
259
'--passphrase-file',
260
passfile.name]
261
+ self.gnupgargs,
262
stdin=subprocess.PIPE,
263
stdout=subprocess.PIPE,
264
stderr=subprocess.PIPE)
265
ciphertext, err = proc.communicate(input=data)
266
if proc.returncode != 0:
267
raise PGPError(err)
268
return ciphertext
269
270
def decrypt(self, data, password):
271
passphrase = self.password_encode(password)
272
with tempfile.NamedTemporaryFile(
273
dir=self.tempdir) as passfile:
274
passfile.write(passphrase)
275
passfile.flush()
276
proc = subprocess.Popen([self.gpg, '--decrypt',
277
'--passphrase-file',
278
passfile.name]
279
+ self.gnupgargs,
280
stdin=subprocess.PIPE,
281
stdout=subprocess.PIPE,
282
stderr=subprocess.PIPE)
283
decrypted_plaintext, err = proc.communicate(input=data)
284
if proc.returncode != 0:
285
raise PGPError(err)
286
return decrypted_plaintext
287
288
289
# Pretend that we have an Avahi module
290
class avahi:
291
"""This isn't so much a class as it is a module-like namespace."""
292
IF_UNSPEC = -1 # avahi-common/address.h
293
PROTO_UNSPEC = -1 # avahi-common/address.h
294
PROTO_INET = 0 # avahi-common/address.h
295
PROTO_INET6 = 1 # avahi-common/address.h
296
DBUS_NAME = "org.freedesktop.Avahi"
297
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
298
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
299
DBUS_PATH_SERVER = "/"
300
301
@staticmethod
302
def string_array_to_txt_array(t):
303
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
304
for s in t), signature="ay")
305
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
306
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
307
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
308
SERVER_INVALID = 0 # avahi-common/defs.h
309
SERVER_REGISTERING = 1 # avahi-common/defs.h
310
SERVER_RUNNING = 2 # avahi-common/defs.h
311
SERVER_COLLISION = 3 # avahi-common/defs.h
312
SERVER_FAILURE = 4 # avahi-common/defs.h
313
84
314
85
315
class AvahiError(Exception):
86
316
def __init__(self, value, *args, **kwargs):
87
317
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
318
return super(AvahiError, self).__init__(value, *args,
319
**kwargs)
320
91
321
92
322
class AvahiServiceError(AvahiError):
93
323
pass
94
324
325
95
326
class AvahiGroupError(AvahiError):
96
327
pass
97
328
98
329
99
class AvahiService(object):
330
class AvahiService:
100
331
"""An Avahi (Zeroconf) service.
332
101
333
Attributes:
102
334
interface: integer; avahi.IF_UNSPEC or an interface index.
103
335
Used to optionally bind to the specified interface.
104
336
name: string; Example: 'Mandos'
105
337
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
338
See <https://www.iana.org/assignments/service-names-port-numbers>
107
339
port: integer; what port to announce
108
340
TXT: list of strings; TXT record for the service
109
341
domain: string; Domain to publish on, default to .local if empty.
111
343
max_renames: integer; maximum number of renames
112
344
rename_count: integer; counter so we only rename after collisions
113
345
a sensible number of times
346
group: D-Bus Entry Group
347
server: D-Bus Server
348
bus: dbus.SystemBus()
114
349
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
350
351
def __init__(self,
352
interface=avahi.IF_UNSPEC,
353
name=None,
354
servicetype=None,
355
port=None,
356
TXT=None,
357
domain="",
358
host="",
359
max_renames=32768,
360
protocol=avahi.PROTO_UNSPEC,
361
bus=None):
119
362
self.interface = interface
120
363
self.name = name
121
364
self.type = servicetype
126
369
self.rename_count = 0
127
370
self.max_renames = max_renames
128
371
self.protocol = protocol
129
def rename(self):
372
self.group = None # our entry group
373
self.server = None
374
self.bus = bus
375
self.entry_group_state_changed_match = None
376
377
def rename(self, remove=True):
130
378
"""Derived from the Avahi example code"""
131
379
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
380
logger.critical("No suitable Zeroconf service name found"
381
" after %i retries, exiting.",
134
382
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
383
raise AvahiServiceError("Too many renames")
384
self.name = str(
385
self.server.GetAlternativeServiceName(self.name))
144
386
self.rename_count += 1
387
logger.info("Changing Zeroconf service name to %r ...",
388
self.name)
389
if remove:
390
self.remove()
391
try:
392
self.add()
393
except dbus.exceptions.DBusException as error:
394
if (error.get_dbus_name()
395
== "org.freedesktop.Avahi.CollisionError"):
396
logger.info("Local Zeroconf service name collision.")
397
return self.rename(remove=False)
398
else:
399
logger.critical("D-Bus Exception", exc_info=error)
400
self.cleanup()
401
os._exit(1)
402
145
403
def remove(self):
146
404
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
405
if self.entry_group_state_changed_match is not None:
406
self.entry_group_state_changed_match.remove()
407
self.entry_group_state_changed_match = None
408
if self.group is not None:
409
self.group.Reset()
410
149
411
def add(self):
150
412
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
413
self.remove()
414
if self.group is None:
415
self.group = dbus.Interface(
416
self.bus.get_object(avahi.DBUS_NAME,
417
self.server.EntryGroupNew()),
418
avahi.DBUS_INTERFACE_ENTRY_GROUP)
419
self.entry_group_state_changed_match = (
420
self.group.connect_to_signal(
421
'StateChanged', self.entry_group_state_changed))
422
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
423
self.name, self.type)
424
self.group.AddService(
425
self.interface,
426
self.protocol,
427
dbus.UInt32(0), # flags
428
self.name, self.type,
429
self.domain, self.host,
430
dbus.UInt16(self.port),
431
avahi.string_array_to_txt_array(self.TXT))
432
self.group.Commit()
433
434
def entry_group_state_changed(self, state, error):
435
"""Derived from the Avahi example code"""
436
logger.debug("Avahi entry group state change: %i", state)
437
438
if state == avahi.ENTRY_GROUP_ESTABLISHED:
439
logger.debug("Zeroconf service established.")
440
elif state == avahi.ENTRY_GROUP_COLLISION:
441
logger.info("Zeroconf service name collision.")
442
self.rename()
443
elif state == avahi.ENTRY_GROUP_FAILURE:
444
logger.critical("Avahi: Error in group state changed %s",
445
str(error))
446
raise AvahiGroupError("State changed: {!s}".format(error))
447
448
def cleanup(self):
449
"""Derived from the Avahi example code"""
450
if self.group is not None:
451
try:
452
self.group.Free()
453
except (dbus.exceptions.UnknownMethodException,
454
dbus.exceptions.DBusException):
455
pass
456
self.group = None
457
self.remove()
458
459
def server_state_changed(self, state, error=None):
460
"""Derived from the Avahi example code"""
461
logger.debug("Avahi server state change: %i", state)
462
bad_states = {
463
avahi.SERVER_INVALID: "Zeroconf server invalid",
464
avahi.SERVER_REGISTERING: None,
465
avahi.SERVER_COLLISION: "Zeroconf server name collision",
466
avahi.SERVER_FAILURE: "Zeroconf server failure",
467
}
468
if state in bad_states:
469
if bad_states[state] is not None:
470
if error is None:
471
logger.error(bad_states[state])
472
else:
473
logger.error(bad_states[state] + ": %r", error)
474
self.cleanup()
475
elif state == avahi.SERVER_RUNNING:
476
try:
477
self.add()
478
except dbus.exceptions.DBusException as error:
479
if (error.get_dbus_name()
480
== "org.freedesktop.Avahi.CollisionError"):
481
logger.info("Local Zeroconf service name"
482
" collision.")
483
return self.rename(remove=False)
484
else:
485
logger.critical("D-Bus Exception", exc_info=error)
486
self.cleanup()
487
os._exit(1)
488
else:
489
if error is None:
490
logger.debug("Unknown state: %r", state)
491
else:
492
logger.debug("Unknown state: %r: %r", state, error)
493
494
def activate(self):
495
"""Derived from the Avahi example code"""
496
if self.server is None:
497
self.server = dbus.Interface(
498
self.bus.get_object(avahi.DBUS_NAME,
499
avahi.DBUS_PATH_SERVER,
500
follow_name_owner_changes=True),
501
avahi.DBUS_INTERFACE_SERVER)
502
self.server.connect_to_signal("StateChanged",
503
self.server_state_changed)
504
self.server_state_changed(self.server.GetState())
505
506
507
class AvahiServiceToSyslog(AvahiService):
508
def rename(self, *args, **kwargs):
509
"""Add the new name to the syslog messages"""
510
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
511
syslogger.setFormatter(logging.Formatter(
512
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
513
.format(self.name)))
514
return ret
515
516
517
# Pretend that we have a GnuTLS module
518
class gnutls:
519
"""This isn't so much a class as it is a module-like namespace."""
520
521
library = ctypes.util.find_library("gnutls")
522
if library is None:
523
library = ctypes.util.find_library("gnutls-deb0")
524
_library = ctypes.cdll.LoadLibrary(library)
525
del library
526
527
# Unless otherwise indicated, the constants and types below are
528
# all from the gnutls/gnutls.h C header file.
529
530
# Constants
531
E_SUCCESS = 0
532
E_INTERRUPTED = -52
533
E_AGAIN = -28
534
CRT_OPENPGP = 2
535
CRT_RAWPK = 3
536
CLIENT = 2
537
SHUT_RDWR = 0
538
CRD_CERTIFICATE = 1
539
E_NO_CERTIFICATE_FOUND = -49
540
X509_FMT_DER = 0
541
NO_TICKETS = 1<<10
542
ENABLE_RAWPK = 1<<18
543
CTYPE_PEERS = 3
544
KEYID_USE_SHA256 = 1 # gnutls/x509.h
545
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
546
547
# Types
548
class session_int(ctypes.Structure):
549
_fields_ = []
550
session_t = ctypes.POINTER(session_int)
551
552
class certificate_credentials_st(ctypes.Structure):
553
_fields_ = []
554
certificate_credentials_t = ctypes.POINTER(
555
certificate_credentials_st)
556
certificate_type_t = ctypes.c_int
557
558
class datum_t(ctypes.Structure):
559
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
560
('size', ctypes.c_uint)]
561
562
class openpgp_crt_int(ctypes.Structure):
563
_fields_ = []
564
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
565
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
566
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
567
credentials_type_t = ctypes.c_int
568
transport_ptr_t = ctypes.c_void_p
569
close_request_t = ctypes.c_int
570
571
# Exceptions
572
class Error(Exception):
573
def __init__(self, message=None, code=None, args=()):
574
# Default usage is by a message string, but if a return
575
# code is passed, convert it to a string with
576
# gnutls.strerror()
577
self.code = code
578
if message is None and code is not None:
579
message = gnutls.strerror(code)
580
return super(gnutls.Error, self).__init__(
581
message, *args)
582
583
class CertificateSecurityError(Error):
584
pass
585
586
# Classes
587
class Credentials:
588
def __init__(self):
589
self._c_object = gnutls.certificate_credentials_t()
590
gnutls.certificate_allocate_credentials(
591
ctypes.byref(self._c_object))
592
self.type = gnutls.CRD_CERTIFICATE
593
594
def __del__(self):
595
gnutls.certificate_free_credentials(self._c_object)
596
597
class ClientSession:
598
def __init__(self, socket, credentials=None):
599
self._c_object = gnutls.session_t()
600
gnutls_flags = gnutls.CLIENT
601
if gnutls.check_version(b"3.5.6"):
602
gnutls_flags |= gnutls.NO_TICKETS
603
if gnutls.has_rawpk:
604
gnutls_flags |= gnutls.ENABLE_RAWPK
605
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
606
del gnutls_flags
607
gnutls.set_default_priority(self._c_object)
608
gnutls.transport_set_ptr(self._c_object, socket.fileno())
609
gnutls.handshake_set_private_extensions(self._c_object,
610
True)
611
self.socket = socket
612
if credentials is None:
613
credentials = gnutls.Credentials()
614
gnutls.credentials_set(self._c_object, credentials.type,
615
ctypes.cast(credentials._c_object,
616
ctypes.c_void_p))
617
self.credentials = credentials
618
619
def __del__(self):
620
gnutls.deinit(self._c_object)
621
622
def handshake(self):
623
return gnutls.handshake(self._c_object)
624
625
def send(self, data):
626
data = bytes(data)
627
data_len = len(data)
628
while data_len > 0:
629
data_len -= gnutls.record_send(self._c_object,
630
data[-data_len:],
631
data_len)
632
633
def bye(self):
634
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
635
636
# Error handling functions
637
def _error_code(result):
638
"""A function to raise exceptions on errors, suitable
639
for the 'restype' attribute on ctypes functions"""
640
if result >= 0:
641
return result
642
if result == gnutls.E_NO_CERTIFICATE_FOUND:
643
raise gnutls.CertificateSecurityError(code=result)
644
raise gnutls.Error(code=result)
645
646
def _retry_on_error(result, func, arguments):
647
"""A function to retry on some errors, suitable
648
for the 'errcheck' attribute on ctypes functions"""
649
while result < 0:
650
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
651
return _error_code(result)
652
result = func(*arguments)
653
return result
654
655
# Unless otherwise indicated, the function declarations below are
656
# all from the gnutls/gnutls.h C header file.
657
658
# Functions
659
priority_set_direct = _library.gnutls_priority_set_direct
660
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
661
ctypes.POINTER(ctypes.c_char_p)]
662
priority_set_direct.restype = _error_code
663
664
init = _library.gnutls_init
665
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
666
init.restype = _error_code
667
668
set_default_priority = _library.gnutls_set_default_priority
669
set_default_priority.argtypes = [session_t]
670
set_default_priority.restype = _error_code
671
672
record_send = _library.gnutls_record_send
673
record_send.argtypes = [session_t, ctypes.c_void_p,
674
ctypes.c_size_t]
675
record_send.restype = ctypes.c_ssize_t
676
record_send.errcheck = _retry_on_error
677
678
certificate_allocate_credentials = (
679
_library.gnutls_certificate_allocate_credentials)
680
certificate_allocate_credentials.argtypes = [
681
ctypes.POINTER(certificate_credentials_t)]
682
certificate_allocate_credentials.restype = _error_code
683
684
certificate_free_credentials = (
685
_library.gnutls_certificate_free_credentials)
686
certificate_free_credentials.argtypes = [
687
certificate_credentials_t]
688
certificate_free_credentials.restype = None
689
690
handshake_set_private_extensions = (
691
_library.gnutls_handshake_set_private_extensions)
692
handshake_set_private_extensions.argtypes = [session_t,
693
ctypes.c_int]
694
handshake_set_private_extensions.restype = None
695
696
credentials_set = _library.gnutls_credentials_set
697
credentials_set.argtypes = [session_t, credentials_type_t,
698
ctypes.c_void_p]
699
credentials_set.restype = _error_code
700
701
strerror = _library.gnutls_strerror
702
strerror.argtypes = [ctypes.c_int]
703
strerror.restype = ctypes.c_char_p
704
705
certificate_type_get = _library.gnutls_certificate_type_get
706
certificate_type_get.argtypes = [session_t]
707
certificate_type_get.restype = _error_code
708
709
certificate_get_peers = _library.gnutls_certificate_get_peers
710
certificate_get_peers.argtypes = [session_t,
711
ctypes.POINTER(ctypes.c_uint)]
712
certificate_get_peers.restype = ctypes.POINTER(datum_t)
713
714
global_set_log_level = _library.gnutls_global_set_log_level
715
global_set_log_level.argtypes = [ctypes.c_int]
716
global_set_log_level.restype = None
717
718
global_set_log_function = _library.gnutls_global_set_log_function
719
global_set_log_function.argtypes = [log_func]
720
global_set_log_function.restype = None
721
722
deinit = _library.gnutls_deinit
723
deinit.argtypes = [session_t]
724
deinit.restype = None
725
726
handshake = _library.gnutls_handshake
727
handshake.argtypes = [session_t]
728
handshake.restype = _error_code
729
handshake.errcheck = _retry_on_error
730
731
transport_set_ptr = _library.gnutls_transport_set_ptr
732
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
733
transport_set_ptr.restype = None
734
735
bye = _library.gnutls_bye
736
bye.argtypes = [session_t, close_request_t]
737
bye.restype = _error_code
738
bye.errcheck = _retry_on_error
739
740
check_version = _library.gnutls_check_version
741
check_version.argtypes = [ctypes.c_char_p]
742
check_version.restype = ctypes.c_char_p
743
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
748
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
751
752
if has_rawpk:
753
# Types
754
class pubkey_st(ctypes.Structure):
755
_fields = []
756
pubkey_t = ctypes.POINTER(pubkey_st)
757
758
x509_crt_fmt_t = ctypes.c_int
759
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
764
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
767
x509_crt_fmt_t]
768
pubkey_import.restype = _error_code
769
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
775
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
779
else:
780
# All the function declarations below are from gnutls/openpgp.h
781
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
785
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
789
openpgp_crt_fmt_t]
790
openpgp_crt_import.restype = _error_code
791
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
796
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
800
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
ctypes.c_void_p,
805
ctypes.POINTER(
806
ctypes.c_size_t)]
807
openpgp_crt_get_fingerprint.restype = _error_code
808
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
certificate_type_get2.restype = _error_code
813
814
# Remove non-public functions
815
del _error_code, _retry_on_error
816
817
818
def call_pipe(connection, # : multiprocessing.Connection
819
func, *args, **kwargs):
820
"""This function is meant to be called by multiprocessing.Process
821
822
This function runs func(*args, **kwargs), and writes the resulting
823
return value on the provided multiprocessing.Connection.
824
"""
825
connection.send(func(*args, **kwargs))
826
connection.close()
827
828
829
class Client:
182
830
"""A representation of a client host served by this server.
831
183
832
Attributes:
833
approved: bool(); 'None' if not yet approved/disapproved
834
approval_delay: datetime.timedelta(); Time to wait for approval
835
approval_duration: datetime.timedelta(); Duration of one approval
836
checker: multiprocessing.Process(); a running checker process used
837
to see if the client lives. 'None' if no process is
838
running.
839
checker_callback_tag: a GLib event source tag, or None
840
checker_command: string; External command which is run to check
841
if client lives. %() expansions are done at
842
runtime with vars(self) as dict, so that for
843
instance %(name)s can be used in the command.
844
checker_initiator_tag: a GLib event source tag, or None
845
created: datetime.datetime(); (UTC) object creation
846
client_structure: Object describing what attributes a client has
847
and is used for storing the client at exit
848
current_checker_command: string; current running checker_command
849
disable_initiator_tag: a GLib event source tag, or None
850
enabled: bool()
851
fingerprint: string (40 or 32 hexadecimal digits); used to
852
uniquely identify an OpenPGP client
853
key_id: string (64 hexadecimal digits); used to uniquely identify
854
a client using raw public keys
855
host: string; available for use by the checker command
856
interval: datetime.timedelta(); How often to start a new checker
857
last_approval_request: datetime.datetime(); (UTC) or None
858
last_checked_ok: datetime.datetime(); (UTC) or None
859
last_checker_status: integer between 0 and 255 reflecting exit
860
status of last checker. -1 reflects crashed
861
checker, -2 means no checker completed yet.
862
last_checker_signal: The signal which killed the last checker, if
863
last_checker_status is -1
864
last_enabled: datetime.datetime(); (UTC) or None
184
865
name: string; from the config file, used in log messages and
185
866
D-Bus identifiers
186
fingerprint: string (40 or 32 hexadecimal digits); used to
187
uniquely identify the client
188
867
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
868
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
198
checker: subprocess.Popen(); a running checker process used
199
to see if the client lives.
200
'None' if no process is running.
201
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
203
checker_callback_tag: - '' -
204
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
206
runtime with vars(self) as dict, so that for
207
instance %(name)s can be used in the command.
208
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
869
until this client is disabled
870
extended_timeout: extra long timeout when secret has been sent
871
runtime_expansions: Allowed attributes for runtime expansion.
872
expires: datetime.datetime(); time (UTC) when a client will be
873
disabled, or None
874
server_settings: The server_settings dict from main()
211
875
"""
212
def timeout_milliseconds(self):
213
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
217
218
def interval_milliseconds(self):
219
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
876
877
runtime_expansions = ("approval_delay", "approval_duration",
878
"created", "enabled", "expires", "key_id",
879
"fingerprint", "host", "interval",
880
"last_approval_request", "last_checked_ok",
881
"last_enabled", "name", "timeout")
882
client_defaults = {
883
"timeout": "PT5M",
884
"extended_timeout": "PT15M",
885
"interval": "PT2M",
886
"checker": "fping -q -- %%(host)s",
887
"host": "",
888
"approval_delay": "PT0S",
889
"approval_duration": "PT1S",
890
"approved_by_default": "True",
891
"enabled": "True",
892
}
893
894
@staticmethod
895
def config_parser(config):
896
"""Construct a new dict of client settings of this form:
897
{ client_name: {setting_name: value, ...}, ...}
898
with exceptions for any special settings as defined above.
899
NOTE: Must be a pure function. Must return the same result
900
value given the same arguments.
901
"""
902
settings = {}
903
for client_name in config.sections():
904
section = dict(config.items(client_name))
905
client = settings[client_name] = {}
906
907
client["host"] = section["host"]
908
# Reformat values from string types to Python types
909
client["approved_by_default"] = config.getboolean(
910
client_name, "approved_by_default")
911
client["enabled"] = config.getboolean(client_name,
912
"enabled")
913
914
# Uppercase and remove spaces from key_id and fingerprint
915
# for later comparison purposes with return value from the
916
# key_id() and fingerprint() functions
917
client["key_id"] = (section.get("key_id", "").upper()
918
.replace(" ", ""))
919
client["fingerprint"] = (section["fingerprint"].upper()
920
.replace(" ", ""))
921
if "secret" in section:
922
client["secret"] = codecs.decode(section["secret"]
923
.encode("utf-8"),
924
"base64")
925
elif "secfile" in section:
926
with open(os.path.expanduser(os.path.expandvars
927
(section["secfile"])),
928
"rb") as secfile:
929
client["secret"] = secfile.read()
930
else:
931
raise TypeError("No secret or secfile for section {}"
932
.format(section))
933
client["timeout"] = string_to_delta(section["timeout"])
934
client["extended_timeout"] = string_to_delta(
935
section["extended_timeout"])
936
client["interval"] = string_to_delta(section["interval"])
937
client["approval_delay"] = string_to_delta(
938
section["approval_delay"])
939
client["approval_duration"] = string_to_delta(
940
section["approval_duration"])
941
client["checker_command"] = section["checker"]
942
client["last_approval_request"] = None
943
client["last_checked_ok"] = None
944
client["last_checker_status"] = -2
945
946
return settings
947
948
def __init__(self, settings, name=None, server_settings=None):
229
949
self.name = name
230
if config is None:
231
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
950
if server_settings is None:
951
server_settings = {}
952
self.server_settings = server_settings
953
# adding all client settings
954
for setting, value in settings.items():
955
setattr(self, setting, value)
956
957
if self.enabled:
958
if not hasattr(self, "last_enabled"):
959
self.last_enabled = datetime.datetime.utcnow()
960
if not hasattr(self, "expires"):
961
self.expires = (datetime.datetime.utcnow()
962
+ self.timeout)
247
963
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
964
self.last_enabled = None
965
self.expires = None
966
967
logger.debug("Creating client %r", self.name)
968
logger.debug(" Key ID: %s", self.key_id)
969
logger.debug(" Fingerprint: %s", self.fingerprint)
970
self.created = settings.get("created",
971
datetime.datetime.utcnow())
972
973
# attributes specific for this server instance
258
974
self.checker = None
259
975
self.checker_initiator_tag = None
260
976
self.disable_initiator_tag = None
261
977
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
263
978
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
274
979
self.approved = None
980
self.approvals_pending = 0
981
self.changedstate = multiprocessing_manager.Condition(
982
multiprocessing_manager.Lock())
983
self.client_structure = [attr
984
for attr in self.__dict__.keys()
985
if not attr.startswith("_")]
986
self.client_structure.append("client_structure")
987
988
for name, t in inspect.getmembers(
989
type(self), lambda obj: isinstance(obj, property)):
990
if not name.startswith("_"):
991
self.client_structure.append(name)
992
993
# Send notice to process children that client state has changed
994
def send_changedstate(self):
995
with self.changedstate:
996
self.changedstate.notify_all()
997
275
998
def enable(self):
276
999
"""Start this client's checker and timeout hooks"""
1000
if getattr(self, "enabled", False):
1001
# Already enabled
1002
return
1003
self.expires = datetime.datetime.utcnow() + self.timeout
1004
self.enabled = True
277
1005
self.last_enabled = datetime.datetime.utcnow()
1006
self.init_checker()
1007
self.send_changedstate()
1008
1009
def disable(self, quiet=True):
1010
"""Disable this client."""
1011
if not getattr(self, "enabled", False):
1012
return False
1013
if not quiet:
1014
logger.info("Disabling client %s", self.name)
1015
if getattr(self, "disable_initiator_tag", None) is not None:
1016
GLib.source_remove(self.disable_initiator_tag)
1017
self.disable_initiator_tag = None
1018
self.expires = None
1019
if getattr(self, "checker_initiator_tag", None) is not None:
1020
GLib.source_remove(self.checker_initiator_tag)
1021
self.checker_initiator_tag = None
1022
self.stop_checker()
1023
self.enabled = False
1024
if not quiet:
1025
self.send_changedstate()
1026
# Do not run this again if called by a GLib.timeout_add
1027
return False
1028
1029
def __del__(self):
1030
self.disable()
1031
1032
def init_checker(self):
278
1033
# Schedule a new checker to be started an 'interval' from now,
279
1034
# and every interval from then on.
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
1035
if self.checker_initiator_tag is not None:
1036
GLib.source_remove(self.checker_initiator_tag)
1037
self.checker_initiator_tag = GLib.timeout_add(
1038
int(self.interval.total_seconds() * 1000),
1039
self.start_checker)
1040
# Schedule a disable() when 'timeout' has passed
1041
if self.disable_initiator_tag is not None:
1042
GLib.source_remove(self.disable_initiator_tag)
1043
self.disable_initiator_tag = GLib.timeout_add(
1044
int(self.timeout.total_seconds() * 1000), self.disable)
283
1045
# Also start a new checker *right now*.
284
1046
self.start_checker()
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
301
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
307
gobject.source_remove(self.checker_initiator_tag)
308
self.checker_initiator_tag = None
309
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
317
# Do not run this again if called by a gobject.timeout_add
318
return False
319
320
def __del__(self):
321
self.disable_hook = None
322
self.disable()
323
324
def checker_callback(self, pid, condition, command):
1047
1048
def checker_callback(self, source, condition, connection,
1049
command):
325
1050
"""The checker has completed, so take appropriate actions."""
1051
# Read return code from connection (see call_pipe)
1052
returncode = connection.recv()
1053
connection.close()
1054
if self.checker is not None:
1055
self.checker.join()
326
1056
self.checker_callback_tag = None
327
1057
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
1058
1059
if returncode >= 0:
1060
self.last_checker_status = returncode
1061
self.last_checker_signal = None
1062
if self.last_checker_status == 0:
1063
logger.info("Checker for %(name)s succeeded",
336
1064
vars(self))
337
1065
self.checked_ok()
338
1066
else:
339
logger.info(u"Checker for %(name)s failed",
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
1067
logger.info("Checker for %(name)s failed", vars(self))
346
1068
else:
347
logger.warning(u"Checker for %(name)s crashed?",
1069
self.last_checker_status = -1
1070
self.last_checker_signal = -returncode
1071
logger.warning("Checker for %(name)s crashed?",
348
1072
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
1073
return False
1074
355
1075
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
1076
"""Assert that the client has been seen, alive and well."""
360
1077
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
371
1078
self.last_checker_status = 0
1079
self.last_checker_signal = None
1080
self.bump_timeout()
1081
1082
def bump_timeout(self, timeout=None):
1083
"""Bump up the timeout for this client."""
1084
if timeout is None:
1085
timeout = self.timeout
1086
if self.disable_initiator_tag is not None:
1087
GLib.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
if getattr(self, "enabled", False):
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(timeout.total_seconds() * 1000), self.disable)
1092
self.expires = datetime.datetime.utcnow() + timeout
1093
1094
def need_approval(self):
1095
self.last_approval_request = datetime.datetime.utcnow()
1096
372
1097
def start_checker(self):
373
1098
"""Start a new checker subprocess if one is not running.
1099
374
1100
If a checker already exists, leave it running and do
375
1101
nothing."""
376
1102
# The reason for not killing a running checker is that if we
377
# did that, then if a checker (for some reason) started
378
# running slowly and taking more than 'interval' time, the
379
# client would inevitably timeout, since no checker would get
380
# a chance to run to completion. If we instead leave running
1103
# did that, and if a checker (for some reason) started running
1104
# slowly and taking more than 'interval' time, then the client
1105
# would inevitably timeout, since no checker would get a
1106
# chance to run to completion. If we instead leave running
381
1107
# checkers alone, the checker would have to take more time
382
# than 'timeout' for the client to be declared invalid, which
383
# is as it should be.
384
385
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
if pid:
389
logger.warning("Checker was a zombie")
390
gobject.source_remove(self.checker_callback_tag)
391
self.checker_callback(pid, status,
392
self.current_checker_command)
1108
# than 'timeout' for the client to be disabled, which is as it
1109
# should be.
1110
1111
if self.checker is not None and not self.checker.is_alive():
1112
logger.warning("Checker was not alive; joining")
1113
self.checker.join()
1114
self.checker = None
393
1115
# Start a new checker if needed
394
1116
if self.checker is None:
395
try:
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
398
except TypeError:
399
# Escape attributes for the shell
400
escaped_attrs = dict((key, re.escape(str(val)))
401
for key, val in
402
vars(self).iteritems())
403
try:
404
command = self.checker_command % escaped_attrs
405
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
408
return True # Try again later
409
self.current_checker_command = command
410
try:
411
logger.info(u"Starting checker %r for %s",
412
command, self.name)
413
# We don't need to redirect stdout and stderr, since
414
# in normal mode, that is already done by daemon(),
415
# and in debug mode we don't want to. (Stdin is
416
# always replaced by /dev/null.)
417
self.checker = subprocess.Popen(command,
418
close_fds=True,
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
432
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
436
except OSError, error:
437
logger.error(u"Failed to start subprocess: %s",
438
error)
439
# Re-run this periodically if run by gobject.timeout_add
1117
# Escape attributes for the shell
1118
escaped_attrs = {
1119
attr: re.escape(str(getattr(self, attr)))
1120
for attr in self.runtime_expansions}
1121
try:
1122
command = self.checker_command % escaped_attrs
1123
except TypeError as error:
1124
logger.error('Could not format string "%s"',
1125
self.checker_command,
1126
exc_info=error)
1127
return True # Try again later
1128
self.current_checker_command = command
1129
logger.info("Starting checker %r for %s", command,
1130
self.name)
1131
# We don't need to redirect stdout and stderr, since
1132
# in normal mode, that is already done by daemon(),
1133
# and in debug mode we don't want to. (Stdin is
1134
# always replaced by /dev/null.)
1135
# The exception is when not debugging but nevertheless
1136
# running in the foreground; use the previously
1137
# created wnull.
1138
popen_args = {"close_fds": True,
1139
"shell": True,
1140
"cwd": "/"}
1141
if (not self.server_settings["debug"]
1142
and self.server_settings["foreground"]):
1143
popen_args.update({"stdout": wnull,
1144
"stderr": wnull})
1145
pipe = multiprocessing.Pipe(duplex=False)
1146
self.checker = multiprocessing.Process(
1147
target=call_pipe,
1148
args=(pipe[1], subprocess.call, command),
1149
kwargs=popen_args)
1150
self.checker.start()
1151
self.checker_callback_tag = GLib.io_add_watch(
1152
GLib.IOChannel.unix_new(pipe[0].fileno()),
1153
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1154
self.checker_callback, pipe[0], command)
1155
# Re-run this periodically if run by GLib.timeout_add
440
1156
return True
441
1157
442
1158
def stop_checker(self):
443
1159
"""Force the checker process, if any, to stop."""
444
1160
if self.checker_callback_tag:
445
gobject.source_remove(self.checker_callback_tag)
1161
GLib.source_remove(self.checker_callback_tag)
446
1162
self.checker_callback_tag = None
447
1163
if getattr(self, "checker", None) is None:
448
1164
return
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
450
try:
451
os.kill(self.checker.pid, signal.SIGTERM)
452
#os.sleep(0.5)
453
#if self.checker.poll() is None:
454
# os.kill(self.checker.pid, signal.SIGKILL)
455
except OSError, error:
456
if error.errno != errno.ESRCH: # No such process
457
raise
1165
logger.debug("Stopping checker for %(name)s", vars(self))
1166
self.checker.terminate()
458
1167
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
464
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
469
return now < (self.created + self.timeout)
1168
1169
1170
def dbus_service_property(dbus_interface,
1171
signature="v",
1172
access="readwrite",
1173
byte_arrays=False):
1174
"""Decorators for marking methods of a DBusObjectWithProperties to
1175
become properties on the D-Bus.
1176
1177
The decorated method will be called with no arguments by "Get"
1178
and with one argument by "Set".
1179
1180
The parameters, where they are supported, are the same as
1181
dbus.service.method, except there is only "signature", since the
1182
type from Get() and the type sent to Set() is the same.
1183
"""
1184
# Encoding deeply encoded byte arrays is not supported yet by the
1185
# "Set" method, so we fail early here:
1186
if byte_arrays and signature != "ay":
1187
raise ValueError("Byte arrays not supported for non-'ay'"
1188
" signature {!r}".format(signature))
1189
1190
def decorator(func):
1191
func._dbus_is_property = True
1192
func._dbus_interface = dbus_interface
1193
func._dbus_signature = signature
1194
func._dbus_access = access
1195
func._dbus_name = func.__name__
1196
if func._dbus_name.endswith("_dbus_property"):
1197
func._dbus_name = func._dbus_name[:-14]
1198
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1199
return func
1200
1201
return decorator
1202
1203
1204
def dbus_interface_annotations(dbus_interface):
1205
"""Decorator for marking functions returning interface annotations
1206
1207
Usage:
1208
1209
@dbus_interface_annotations("org.example.Interface")
1210
def _foo(self): # Function name does not matter
1211
return {"org.freedesktop.DBus.Deprecated": "true",
1212
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1213
"false"}
1214
"""
1215
1216
def decorator(func):
1217
func._dbus_is_interface = True
1218
func._dbus_interface = dbus_interface
1219
func._dbus_name = dbus_interface
1220
return func
1221
1222
return decorator
1223
1224
1225
def dbus_annotations(annotations):
1226
"""Decorator to annotate D-Bus methods, signals or properties
1227
Usage:
1228
1229
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1230
"org.freedesktop.DBus.Property."
1231
"EmitsChangedSignal": "false"})
1232
@dbus_service_property("org.example.Interface", signature="b",
1233
access="r")
1234
def Property_dbus_property(self):
1235
return dbus.Boolean(False)
1236
1237
See also the DBusObjectWithAnnotations class.
1238
"""
1239
1240
def decorator(func):
1241
func._dbus_annotations = annotations
1242
return func
1243
1244
return decorator
1245
1246
1247
class DBusPropertyException(dbus.exceptions.DBusException):
1248
"""A base class for D-Bus property-related exceptions
1249
"""
1250
pass
1251
1252
1253
class DBusPropertyAccessException(DBusPropertyException):
1254
"""A property's access permissions disallows an operation.
1255
"""
1256
pass
1257
1258
1259
class DBusPropertyNotFound(DBusPropertyException):
1260
"""An attempt was made to access a non-existing property.
1261
"""
1262
pass
1263
1264
1265
class DBusObjectWithAnnotations(dbus.service.Object):
1266
"""A D-Bus object with annotations.
1267
1268
Classes inheriting from this can use the dbus_annotations
1269
decorator to add annotations to methods or signals.
1270
"""
1271
1272
@staticmethod
1273
def _is_dbus_thing(thing):
1274
"""Returns a function testing if an attribute is a D-Bus thing
1275
1276
If called like _is_dbus_thing("method") it returns a function
1277
suitable for use as predicate to inspect.getmembers().
1278
"""
1279
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1280
False)
1281
1282
def _get_all_dbus_things(self, thing):
1283
"""Returns a generator of (name, attribute) pairs
1284
"""
1285
return ((getattr(athing.__get__(self), "_dbus_name", name),
1286
athing.__get__(self))
1287
for cls in self.__class__.__mro__
1288
for name, athing in
1289
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1290
1291
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1292
out_signature="s",
1293
path_keyword='object_path',
1294
connection_keyword='connection')
1295
def Introspect(self, object_path, connection):
1296
"""Overloading of standard D-Bus method.
1297
1298
Inserts annotation tags on methods and signals.
1299
"""
1300
xmlstring = dbus.service.Object.Introspect(self, object_path,
1301
connection)
1302
try:
1303
document = xml.dom.minidom.parseString(xmlstring)
1304
1305
for if_tag in document.getElementsByTagName("interface"):
1306
# Add annotation tags
1307
for typ in ("method", "signal"):
1308
for tag in if_tag.getElementsByTagName(typ):
1309
annots = dict()
1310
for name, prop in (self.
1311
_get_all_dbus_things(typ)):
1312
if (name == tag.getAttribute("name")
1313
and prop._dbus_interface
1314
== if_tag.getAttribute("name")):
1315
annots.update(getattr(
1316
prop, "_dbus_annotations", {}))
1317
for name, value in annots.items():
1318
ann_tag = document.createElement(
1319
"annotation")
1320
ann_tag.setAttribute("name", name)
1321
ann_tag.setAttribute("value", value)
1322
tag.appendChild(ann_tag)
1323
# Add interface annotation tags
1324
for annotation, value in dict(
1325
itertools.chain.from_iterable(
1326
annotations().items()
1327
for name, annotations
1328
in self._get_all_dbus_things("interface")
1329
if name == if_tag.getAttribute("name")
1330
)).items():
1331
ann_tag = document.createElement("annotation")
1332
ann_tag.setAttribute("name", annotation)
1333
ann_tag.setAttribute("value", value)
1334
if_tag.appendChild(ann_tag)
1335
# Fix argument name for the Introspect method itself
1336
if (if_tag.getAttribute("name")
1337
== dbus.INTROSPECTABLE_IFACE):
1338
for cn in if_tag.getElementsByTagName("method"):
1339
if cn.getAttribute("name") == "Introspect":
1340
for arg in cn.getElementsByTagName("arg"):
1341
if (arg.getAttribute("direction")
1342
== "out"):
1343
arg.setAttribute("name",
1344
"xml_data")
1345
xmlstring = document.toxml("utf-8")
1346
document.unlink()
1347
except (AttributeError, xml.dom.DOMException,
1348
xml.parsers.expat.ExpatError) as error:
1349
logger.error("Failed to override Introspection method",
1350
exc_info=error)
1351
return xmlstring
1352
1353
1354
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1355
"""A D-Bus object with properties.
1356
1357
Classes inheriting from this can use the dbus_service_property
1358
decorator to expose methods as D-Bus properties. It exposes the
1359
standard Get(), Set(), and GetAll() methods on the D-Bus.
1360
"""
1361
1362
def _get_dbus_property(self, interface_name, property_name):
1363
"""Returns a bound method if one exists which is a D-Bus
1364
property with the specified name and interface.
1365
"""
1366
for cls in self.__class__.__mro__:
1367
for name, value in inspect.getmembers(
1368
cls, self._is_dbus_thing("property")):
1369
if (value._dbus_name == property_name
1370
and value._dbus_interface == interface_name):
1371
return value.__get__(self)
1372
1373
# No such property
1374
raise DBusPropertyNotFound("{}:{}.{}".format(
1375
self.dbus_object_path, interface_name, property_name))
1376
1377
@classmethod
1378
def _get_all_interface_names(cls):
1379
"""Get a sequence of all interfaces supported by an object"""
1380
return (name for name in set(getattr(getattr(x, attr),
1381
"_dbus_interface", None)
1382
for x in (inspect.getmro(cls))
1383
for attr in dir(x))
1384
if name is not None)
1385
1386
@dbus.service.method(dbus.PROPERTIES_IFACE,
1387
in_signature="ss",
1388
out_signature="v")
1389
def Get(self, interface_name, property_name):
1390
"""Standard D-Bus property Get() method, see D-Bus standard.
1391
"""
1392
prop = self._get_dbus_property(interface_name, property_name)
1393
if prop._dbus_access == "write":
1394
raise DBusPropertyAccessException(property_name)
1395
value = prop()
1396
if not hasattr(value, "variant_level"):
1397
return value
1398
return type(value)(value, variant_level=value.variant_level+1)
1399
1400
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1401
def Set(self, interface_name, property_name, value):
1402
"""Standard D-Bus property Set() method, see D-Bus standard.
1403
"""
1404
prop = self._get_dbus_property(interface_name, property_name)
1405
if prop._dbus_access == "read":
1406
raise DBusPropertyAccessException(property_name)
1407
if prop._dbus_get_args_options["byte_arrays"]:
1408
# The byte_arrays option is not supported yet on
1409
# signatures other than "ay".
1410
if prop._dbus_signature != "ay":
1411
raise ValueError("Byte arrays not supported for non-"
1412
"'ay' signature {!r}"
1413
.format(prop._dbus_signature))
1414
value = dbus.ByteArray(bytes(value))
1415
prop(value)
1416
1417
@dbus.service.method(dbus.PROPERTIES_IFACE,
1418
in_signature="s",
1419
out_signature="a{sv}")
1420
def GetAll(self, interface_name):
1421
"""Standard D-Bus property GetAll() method, see D-Bus
1422
standard.
1423
1424
Note: Will not include properties with access="write".
1425
"""
1426
properties = {}
1427
for name, prop in self._get_all_dbus_things("property"):
1428
if (interface_name
1429
and interface_name != prop._dbus_interface):
1430
# Interface non-empty but did not match
1431
continue
1432
# Ignore write-only properties
1433
if prop._dbus_access == "write":
1434
continue
1435
value = prop()
1436
if not hasattr(value, "variant_level"):
1437
properties[name] = value
1438
continue
1439
properties[name] = type(value)(
1440
value, variant_level=value.variant_level + 1)
1441
return dbus.Dictionary(properties, signature="sv")
1442
1443
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1444
def PropertiesChanged(self, interface_name, changed_properties,
1445
invalidated_properties):
1446
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1447
standard.
1448
"""
1449
pass
1450
1451
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1452
out_signature="s",
1453
path_keyword='object_path',
1454
connection_keyword='connection')
1455
def Introspect(self, object_path, connection):
1456
"""Overloading of standard D-Bus method.
1457
1458
Inserts property tags and interface annotation tags.
1459
"""
1460
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1461
object_path,
1462
connection)
1463
try:
1464
document = xml.dom.minidom.parseString(xmlstring)
1465
1466
def make_tag(document, name, prop):
1467
e = document.createElement("property")
1468
e.setAttribute("name", name)
1469
e.setAttribute("type", prop._dbus_signature)
1470
e.setAttribute("access", prop._dbus_access)
1471
return e
1472
1473
for if_tag in document.getElementsByTagName("interface"):
1474
# Add property tags
1475
for tag in (make_tag(document, name, prop)
1476
for name, prop
1477
in self._get_all_dbus_things("property")
1478
if prop._dbus_interface
1479
== if_tag.getAttribute("name")):
1480
if_tag.appendChild(tag)
1481
# Add annotation tags for properties
1482
for tag in if_tag.getElementsByTagName("property"):
1483
annots = dict()
1484
for name, prop in self._get_all_dbus_things(
1485
"property"):
1486
if (name == tag.getAttribute("name")
1487
and prop._dbus_interface
1488
== if_tag.getAttribute("name")):
1489
annots.update(getattr(
1490
prop, "_dbus_annotations", {}))
1491
for name, value in annots.items():
1492
ann_tag = document.createElement(
1493
"annotation")
1494
ann_tag.setAttribute("name", name)
1495
ann_tag.setAttribute("value", value)
1496
tag.appendChild(ann_tag)
1497
# Add the names to the return values for the
1498
# "org.freedesktop.DBus.Properties" methods
1499
if (if_tag.getAttribute("name")
1500
== "org.freedesktop.DBus.Properties"):
1501
for cn in if_tag.getElementsByTagName("method"):
1502
if cn.getAttribute("name") == "Get":
1503
for arg in cn.getElementsByTagName("arg"):
1504
if (arg.getAttribute("direction")
1505
== "out"):
1506
arg.setAttribute("name", "value")
1507
elif cn.getAttribute("name") == "GetAll":
1508
for arg in cn.getElementsByTagName("arg"):
1509
if (arg.getAttribute("direction")
1510
== "out"):
1511
arg.setAttribute("name", "props")
1512
xmlstring = document.toxml("utf-8")
1513
document.unlink()
1514
except (AttributeError, xml.dom.DOMException,
1515
xml.parsers.expat.ExpatError) as error:
1516
logger.error("Failed to override Introspection method",
1517
exc_info=error)
1518
return xmlstring
1519
1520
1521
try:
1522
dbus.OBJECT_MANAGER_IFACE
1523
except AttributeError:
1524
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1525
1526
1527
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1528
"""A D-Bus object with an ObjectManager.
1529
1530
Classes inheriting from this exposes the standard
1531
GetManagedObjects call and the InterfacesAdded and
1532
InterfacesRemoved signals on the standard
1533
"org.freedesktop.DBus.ObjectManager" interface.
1534
1535
Note: No signals are sent automatically; they must be sent
1536
manually.
1537
"""
1538
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1539
out_signature="a{oa{sa{sv}}}")
1540
def GetManagedObjects(self):
1541
"""This function must be overridden"""
1542
raise NotImplementedError()
1543
1544
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1545
signature="oa{sa{sv}}")
1546
def InterfacesAdded(self, object_path, interfaces_and_properties):
1547
pass
1548
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1550
def InterfacesRemoved(self, object_path, interfaces):
1551
pass
1552
1553
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1554
out_signature="s",
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1557
def Introspect(self, object_path, connection):
1558
"""Overloading of standard D-Bus method.
1559
1560
Override return argument name of GetManagedObjects to be
1561
"objpath_interfaces_and_properties"
1562
"""
1563
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
object_path,
1565
connection)
1566
try:
1567
document = xml.dom.minidom.parseString(xmlstring)
1568
1569
for if_tag in document.getElementsByTagName("interface"):
1570
# Fix argument name for the GetManagedObjects method
1571
if (if_tag.getAttribute("name")
1572
== dbus.OBJECT_MANAGER_IFACE):
1573
for cn in if_tag.getElementsByTagName("method"):
1574
if (cn.getAttribute("name")
1575
== "GetManagedObjects"):
1576
for arg in cn.getElementsByTagName("arg"):
1577
if (arg.getAttribute("direction")
1578
== "out"):
1579
arg.setAttribute(
1580
"name",
1581
"objpath_interfaces"
1582
"_and_properties")
1583
xmlstring = document.toxml("utf-8")
1584
document.unlink()
1585
except (AttributeError, xml.dom.DOMException,
1586
xml.parsers.expat.ExpatError) as error:
1587
logger.error("Failed to override Introspection method",
1588
exc_info=error)
1589
return xmlstring
1590
1591
1592
def datetime_to_dbus(dt, variant_level=0):
1593
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1594
if dt is None:
1595
return dbus.String("", variant_level=variant_level)
1596
return dbus.String(dt.isoformat(), variant_level=variant_level)
1597
1598
1599
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1600
"""A class decorator; applied to a subclass of
1601
dbus.service.Object, it will add alternate D-Bus attributes with
1602
interface names according to the "alt_interface_names" mapping.
1603
Usage:
1604
1605
@alternate_dbus_interfaces({"org.example.Interface":
1606
"net.example.AlternateInterface"})
1607
class SampleDBusObject(dbus.service.Object):
1608
@dbus.service.method("org.example.Interface")
1609
def SampleDBusMethod():
1610
pass
1611
1612
The above "SampleDBusMethod" on "SampleDBusObject" will be
1613
reachable via two interfaces: "org.example.Interface" and
1614
"net.example.AlternateInterface", the latter of which will have
1615
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1616
"true", unless "deprecate" is passed with a False value.
1617
1618
This works for methods and signals, and also for D-Bus properties
1619
(from DBusObjectWithProperties) and interfaces (from the
1620
dbus_interface_annotations decorator).
1621
"""
1622
1623
def wrapper(cls):
1624
for orig_interface_name, alt_interface_name in (
1625
alt_interface_names.items()):
1626
attr = {}
1627
interface_names = set()
1628
# Go though all attributes of the class
1629
for attrname, attribute in inspect.getmembers(cls):
1630
# Ignore non-D-Bus attributes, and D-Bus attributes
1631
# with the wrong interface name
1632
if (not hasattr(attribute, "_dbus_interface")
1633
or not attribute._dbus_interface.startswith(
1634
orig_interface_name)):
1635
continue
1636
# Create an alternate D-Bus interface name based on
1637
# the current name
1638
alt_interface = attribute._dbus_interface.replace(
1639
orig_interface_name, alt_interface_name)
1640
interface_names.add(alt_interface)
1641
# Is this a D-Bus signal?
1642
if getattr(attribute, "_dbus_is_signal", False):
1643
# Extract the original non-method undecorated
1644
# function by black magic
1645
if sys.version_info.major == 2:
1646
nonmethod_func = (dict(
1647
zip(attribute.func_code.co_freevars,
1648
attribute.__closure__))
1649
["func"].cell_contents)
1650
else:
1651
nonmethod_func = (dict(
1652
zip(attribute.__code__.co_freevars,
1653
attribute.__closure__))
1654
["func"].cell_contents)
1655
# Create a new, but exactly alike, function
1656
# object, and decorate it to be a new D-Bus signal
1657
# with the alternate D-Bus interface name
1658
new_function = copy_function(nonmethod_func)
1659
new_function = (dbus.service.signal(
1660
alt_interface,
1661
attribute._dbus_signature)(new_function))
1662
# Copy annotations, if any
1663
try:
1664
new_function._dbus_annotations = dict(
1665
attribute._dbus_annotations)
1666
except AttributeError:
1667
pass
1668
1669
# Define a creator of a function to call both the
1670
# original and alternate functions, so both the
1671
# original and alternate signals gets sent when
1672
# the function is called
1673
def fixscope(func1, func2):
1674
"""This function is a scope container to pass
1675
func1 and func2 to the "call_both" function
1676
outside of its arguments"""
1677
1678
@functools.wraps(func2)
1679
def call_both(*args, **kwargs):
1680
"""This function will emit two D-Bus
1681
signals by calling func1 and func2"""
1682
func1(*args, **kwargs)
1683
func2(*args, **kwargs)
1684
# Make wrapper function look like a D-Bus
1685
# signal
1686
for name, attr in inspect.getmembers(func2):
1687
if name.startswith("_dbus_"):
1688
setattr(call_both, name, attr)
1689
1690
return call_both
1691
# Create the "call_both" function and add it to
1692
# the class
1693
attr[attrname] = fixscope(attribute, new_function)
1694
# Is this a D-Bus method?
1695
elif getattr(attribute, "_dbus_is_method", False):
1696
# Create a new, but exactly alike, function
1697
# object. Decorate it to be a new D-Bus method
1698
# with the alternate D-Bus interface name. Add it
1699
# to the class.
1700
attr[attrname] = (
1701
dbus.service.method(
1702
alt_interface,
1703
attribute._dbus_in_signature,
1704
attribute._dbus_out_signature)
1705
(copy_function(attribute)))
1706
# Copy annotations, if any
1707
try:
1708
attr[attrname]._dbus_annotations = dict(
1709
attribute._dbus_annotations)
1710
except AttributeError:
1711
pass
1712
# Is this a D-Bus property?
1713
elif getattr(attribute, "_dbus_is_property", False):
1714
# Create a new, but exactly alike, function
1715
# object, and decorate it to be a new D-Bus
1716
# property with the alternate D-Bus interface
1717
# name. Add it to the class.
1718
attr[attrname] = (dbus_service_property(
1719
alt_interface, attribute._dbus_signature,
1720
attribute._dbus_access,
1721
attribute._dbus_get_args_options
1722
["byte_arrays"])
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1725
try:
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
1729
pass
1730
# Is this a D-Bus interface?
1731
elif getattr(attribute, "_dbus_is_interface", False):
1732
# Create a new, but exactly alike, function
1733
# object. Decorate it to be a new D-Bus interface
1734
# with the alternate D-Bus interface name. Add it
1735
# to the class.
1736
attr[attrname] = (
1737
dbus_interface_annotations(alt_interface)
1738
(copy_function(attribute)))
1739
if deprecate:
1740
# Deprecate all alternate interfaces
1741
iname = "_AlternateDBusNames_interface_annotation{}"
1742
for interface_name in interface_names:
1743
1744
@dbus_interface_annotations(interface_name)
1745
def func(self):
1746
return {"org.freedesktop.DBus.Deprecated":
1747
"true"}
1748
# Find an unused name
1749
for aname in (iname.format(i)
1750
for i in itertools.count()):
1751
if aname not in attr:
1752
attr[aname] = func
1753
break
1754
if interface_names:
1755
# Replace the class with a new subclass of it with
1756
# methods, signals, etc. as created above.
1757
if sys.version_info.major == 2:
1758
cls = type(b"{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
else:
1761
cls = type("{}Alternate".format(cls.__name__),
1762
(cls, ), attr)
1763
return cls
1764
1765
return wrapper
1766
1767
1768
@alternate_dbus_interfaces({"se.recompile.Mandos":
1769
"se.bsnet.fukt.Mandos"})
1770
class ClientDBus(Client, DBusObjectWithProperties):
1771
"""A Client class using D-Bus
1772
1773
Attributes:
1774
dbus_object_path: dbus.ObjectPath
1775
bus: dbus.SystemBus()
1776
"""
1777
1778
runtime_expansions = (Client.runtime_expansions
1779
+ ("dbus_object_path", ))
1780
1781
_interface = "se.recompile.Mandos.Client"
1782
1783
# dbus.service.Object doesn't use super(), so we can't either.
1784
1785
def __init__(self, bus=None, *args, **kwargs):
1786
self.bus = bus
1787
Client.__init__(self, *args, **kwargs)
1788
# Only now, when this client is initialized, can it show up on
1789
# the D-Bus
1790
client_object_name = str(self.name).translate(
1791
{ord("."): ord("_"),
1792
ord("-"): ord("_")})
1793
self.dbus_object_path = dbus.ObjectPath(
1794
"/clients/" + client_object_name)
1795
DBusObjectWithProperties.__init__(self, self.bus,
1796
self.dbus_object_path)
1797
1798
def notifychangeproperty(transform_func, dbus_name,
1799
type_func=lambda x: x,
1800
variant_level=1,
1801
invalidate_only=False,
1802
_interface=_interface):
1803
""" Modify a variable so that it's a property which announces
1804
its changes to DBus.
1805
1806
transform_fun: Function that takes a value and a variant_level
1807
and transforms it to a D-Bus type.
1808
dbus_name: D-Bus name of the variable
1809
type_func: Function that transform the value before sending it
1810
to the D-Bus. Default: no transform
1811
variant_level: D-Bus variant level. Default: 1
1812
"""
1813
attrname = "_{}".format(dbus_name)
1814
1815
def setter(self, value):
1816
if hasattr(self, "dbus_object_path"):
1817
if (not hasattr(self, attrname) or
1818
type_func(getattr(self, attrname, None))
1819
!= type_func(value)):
1820
if invalidate_only:
1821
self.PropertiesChanged(
1822
_interface, dbus.Dictionary(),
1823
dbus.Array((dbus_name, )))
1824
else:
1825
dbus_value = transform_func(
1826
type_func(value),
1827
variant_level=variant_level)
1828
self.PropertyChanged(dbus.String(dbus_name),
1829
dbus_value)
1830
self.PropertiesChanged(
1831
_interface,
1832
dbus.Dictionary({dbus.String(dbus_name):
1833
dbus_value}),
1834
dbus.Array())
1835
setattr(self, attrname, value)
1836
1837
return property(lambda self: getattr(self, attrname), setter)
1838
1839
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1840
approvals_pending = notifychangeproperty(dbus.Boolean,
1841
"ApprovalPending",
1842
type_func=bool)
1843
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1844
last_enabled = notifychangeproperty(datetime_to_dbus,
1845
"LastEnabled")
1846
checker = notifychangeproperty(
1847
dbus.Boolean, "CheckerRunning",
1848
type_func=lambda checker: checker is not None)
1849
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1850
"LastCheckedOK")
1851
last_checker_status = notifychangeproperty(dbus.Int16,
1852
"LastCheckerStatus")
1853
last_approval_request = notifychangeproperty(
1854
datetime_to_dbus, "LastApprovalRequest")
1855
approved_by_default = notifychangeproperty(dbus.Boolean,
1856
"ApprovedByDefault")
1857
approval_delay = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDelay",
1859
type_func=lambda td: td.total_seconds() * 1000)
1860
approval_duration = notifychangeproperty(
1861
dbus.UInt64, "ApprovalDuration",
1862
type_func=lambda td: td.total_seconds() * 1000)
1863
host = notifychangeproperty(dbus.String, "Host")
1864
timeout = notifychangeproperty(
1865
dbus.UInt64, "Timeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
extended_timeout = notifychangeproperty(
1868
dbus.UInt64, "ExtendedTimeout",
1869
type_func=lambda td: td.total_seconds() * 1000)
1870
interval = notifychangeproperty(
1871
dbus.UInt64, "Interval",
1872
type_func=lambda td: td.total_seconds() * 1000)
1873
checker_command = notifychangeproperty(dbus.String, "Checker")
1874
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1875
invalidate_only=True)
1876
1877
del notifychangeproperty
1878
1879
def __del__(self, *args, **kwargs):
1880
try:
1881
self.remove_from_connection()
1882
except LookupError:
1883
pass
1884
if hasattr(DBusObjectWithProperties, "__del__"):
1885
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1886
Client.__del__(self, *args, **kwargs)
1887
1888
def checker_callback(self, source, condition,
1889
connection, command, *args, **kwargs):
1890
ret = Client.checker_callback(self, source, condition,
1891
connection, command, *args,
1892
**kwargs)
1893
exitstatus = self.last_checker_status
1894
if exitstatus >= 0:
1895
# Emit D-Bus signal
1896
self.CheckerCompleted(dbus.Int16(exitstatus),
1897
# This is specific to GNU libC
1898
dbus.Int64(exitstatus << 8),
1899
dbus.String(command))
470
1900
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
479
1901
# Emit D-Bus signal
1902
self.CheckerCompleted(dbus.Int16(-1),
1903
dbus.Int64(
1904
# This is specific to GNU libC
1905
(exitstatus << 8)
1906
| self.last_checker_signal),
1907
dbus.String(command))
1908
return ret
1909
1910
def start_checker(self, *args, **kwargs):
1911
old_checker_pid = getattr(self.checker, "pid", None)
1912
r = Client.start_checker(self, *args, **kwargs)
1913
# Only if new checker process was started
1914
if (self.checker is not None
1915
and old_checker_pid != self.checker.pid):
1916
# Emit D-Bus signal
1917
self.CheckerStarted(self.current_checker_command)
1918
return r
1919
1920
def _reset_approved(self):
1921
self.approved = None
1922
return False
1923
1924
def approve(self, value=True):
1925
self.approved = value
1926
GLib.timeout_add(int(self.approval_duration.total_seconds()
1927
* 1000), self._reset_approved)
1928
self.send_changedstate()
1929
1930
# D-Bus methods, signals & properties
1931
1932
# Interfaces
1933
1934
# Signals
1935
480
1936
# CheckerCompleted - signal
481
1937
@dbus.service.signal(_interface, signature="nxs")
482
1938
def CheckerCompleted(self, exitcode, waitstatus, command):
483
1939
"D-Bus signal"
484
1940
pass
485
1941
486
1942
# CheckerStarted - signal
487
1943
@dbus.service.signal(_interface, signature="s")
488
1944
def CheckerStarted(self, command):
489
1945
"D-Bus signal"
490
1946
pass
491
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
1947
539
1948
# PropertyChanged - signal
1949
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
540
1950
@dbus.service.signal(_interface, signature="sv")
541
1951
def PropertyChanged(self, property, value):
542
1952
"D-Bus signal"
543
1953
pass
544
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
588
1954
1955
# GotSecret - signal
1956
@dbus.service.signal(_interface)
1957
def GotSecret(self):
1958
"""D-Bus signal
1959
Is sent after a successful transfer of secret from the Mandos
1960
server to mandos-client
1961
"""
1962
pass
1963
1964
# Rejected - signal
1965
@dbus.service.signal(_interface, signature="s")
1966
def Rejected(self, reason):
1967
"D-Bus signal"
1968
pass
1969
1970
# NeedApproval - signal
1971
@dbus.service.signal(_interface, signature="tb")
1972
def NeedApproval(self, timeout, default):
1973
"D-Bus signal"
1974
return self.need_approval()
1975
1976
# Methods
1977
1978
# Approve - method
1979
@dbus.service.method(_interface, in_signature="b")
1980
def Approve(self, value):
1981
self.approve(value)
1982
1983
# CheckedOK - method
1984
@dbus.service.method(_interface)
1985
def CheckedOK(self):
1986
self.checked_ok()
1987
589
1988
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
592
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1990
@dbus.service.method(_interface)
1991
def Enable(self):
1992
"D-Bus method"
1993
self.enable()
1994
593
1995
# StartChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
594
1997
@dbus.service.method(_interface)
595
1998
def StartChecker(self):
596
1999
"D-Bus method"
597
2000
self.start_checker()
598
2001
599
2002
# Disable - method
2003
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
600
2004
@dbus.service.method(_interface)
601
2005
def Disable(self):
602
2006
"D-Bus method"
603
2007
self.disable()
604
2008
605
2009
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
608
2010
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2011
@dbus.service.method(_interface)
2012
def StopChecker(self):
2013
self.stop_checker()
2014
2015
# Properties
2016
2017
# ApprovalPending - property
2018
@dbus_service_property(_interface, signature="b", access="read")
2019
def ApprovalPending_dbus_property(self):
2020
return dbus.Boolean(bool(self.approvals_pending))
2021
2022
# ApprovedByDefault - property
2023
@dbus_service_property(_interface,
2024
signature="b",
2025
access="readwrite")
2026
def ApprovedByDefault_dbus_property(self, value=None):
2027
if value is None: # get
2028
return dbus.Boolean(self.approved_by_default)
2029
self.approved_by_default = bool(value)
2030
2031
# ApprovalDelay - property
2032
@dbus_service_property(_interface,
2033
signature="t",
2034
access="readwrite")
2035
def ApprovalDelay_dbus_property(self, value=None):
2036
if value is None: # get
2037
return dbus.UInt64(self.approval_delay.total_seconds()
2038
* 1000)
2039
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2040
2041
# ApprovalDuration - property
2042
@dbus_service_property(_interface,
2043
signature="t",
2044
access="readwrite")
2045
def ApprovalDuration_dbus_property(self, value=None):
2046
if value is None: # get
2047
return dbus.UInt64(self.approval_duration.total_seconds()
2048
* 1000)
2049
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2050
2051
# Name - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
@dbus_service_property(_interface, signature="s", access="read")
2055
def Name_dbus_property(self):
2056
return dbus.String(self.name)
2057
2058
# KeyID - property
2059
@dbus_annotations(
2060
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2061
@dbus_service_property(_interface, signature="s", access="read")
2062
def KeyID_dbus_property(self):
2063
return dbus.String(self.key_id)
2064
2065
# Fingerprint - property
2066
@dbus_annotations(
2067
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2068
@dbus_service_property(_interface, signature="s", access="read")
2069
def Fingerprint_dbus_property(self):
2070
return dbus.String(self.fingerprint)
2071
2072
# Host - property
2073
@dbus_service_property(_interface,
2074
signature="s",
2075
access="readwrite")
2076
def Host_dbus_property(self, value=None):
2077
if value is None: # get
2078
return dbus.String(self.host)
2079
self.host = str(value)
2080
2081
# Created - property
2082
@dbus_annotations(
2083
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2084
@dbus_service_property(_interface, signature="s", access="read")
2085
def Created_dbus_property(self):
2086
return datetime_to_dbus(self.created)
2087
2088
# LastEnabled - property
2089
@dbus_service_property(_interface, signature="s", access="read")
2090
def LastEnabled_dbus_property(self):
2091
return datetime_to_dbus(self.last_enabled)
2092
2093
# Enabled - property
2094
@dbus_service_property(_interface,
2095
signature="b",
2096
access="readwrite")
2097
def Enabled_dbus_property(self, value=None):
2098
if value is None: # get
2099
return dbus.Boolean(self.enabled)
2100
if value:
2101
self.enable()
2102
else:
2103
self.disable()
2104
2105
# LastCheckedOK - property
2106
@dbus_service_property(_interface,
2107
signature="s",
2108
access="readwrite")
2109
def LastCheckedOK_dbus_property(self, value=None):
2110
if value is not None:
2111
self.checked_ok()
2112
return
2113
return datetime_to_dbus(self.last_checked_ok)
2114
2115
# LastCheckerStatus - property
2116
@dbus_service_property(_interface, signature="n", access="read")
2117
def LastCheckerStatus_dbus_property(self):
2118
return dbus.Int16(self.last_checker_status)
2119
2120
# Expires - property
2121
@dbus_service_property(_interface, signature="s", access="read")
2122
def Expires_dbus_property(self):
2123
return datetime_to_dbus(self.expires)
2124
2125
# LastApprovalRequest - property
2126
@dbus_service_property(_interface, signature="s", access="read")
2127
def LastApprovalRequest_dbus_property(self):
2128
return datetime_to_dbus(self.last_approval_request)
2129
2130
# Timeout - property
2131
@dbus_service_property(_interface,
2132
signature="t",
2133
access="readwrite")
2134
def Timeout_dbus_property(self, value=None):
2135
if value is None: # get
2136
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2137
old_timeout = self.timeout
2138
self.timeout = datetime.timedelta(0, 0, 0, value)
2139
# Reschedule disabling
2140
if self.enabled:
2141
now = datetime.datetime.utcnow()
2142
self.expires += self.timeout - old_timeout
2143
if self.expires <= now:
2144
# The timeout has passed
2145
self.disable()
2146
else:
2147
if (getattr(self, "disable_initiator_tag", None)
2148
is None):
2149
return
2150
GLib.source_remove(self.disable_initiator_tag)
2151
self.disable_initiator_tag = GLib.timeout_add(
2152
int((self.expires - now).total_seconds() * 1000),
2153
self.disable)
2154
2155
# ExtendedTimeout - property
2156
@dbus_service_property(_interface,
2157
signature="t",
2158
access="readwrite")
2159
def ExtendedTimeout_dbus_property(self, value=None):
2160
if value is None: # get
2161
return dbus.UInt64(self.extended_timeout.total_seconds()
2162
* 1000)
2163
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2164
2165
# Interval - property
2166
@dbus_service_property(_interface,
2167
signature="t",
2168
access="readwrite")
2169
def Interval_dbus_property(self, value=None):
2170
if value is None: # get
2171
return dbus.UInt64(self.interval.total_seconds() * 1000)
2172
self.interval = datetime.timedelta(0, 0, 0, value)
2173
if getattr(self, "checker_initiator_tag", None) is None:
2174
return
2175
if self.enabled:
2176
# Reschedule checker run
2177
GLib.source_remove(self.checker_initiator_tag)
2178
self.checker_initiator_tag = GLib.timeout_add(
2179
value, self.start_checker)
2180
self.start_checker() # Start one now, too
2181
2182
# Checker - property
2183
@dbus_service_property(_interface,
2184
signature="s",
2185
access="readwrite")
2186
def Checker_dbus_property(self, value=None):
2187
if value is None: # get
2188
return dbus.String(self.checker_command)
2189
self.checker_command = str(value)
2190
2191
# CheckerRunning - property
2192
@dbus_service_property(_interface,
2193
signature="b",
2194
access="readwrite")
2195
def CheckerRunning_dbus_property(self, value=None):
2196
if value is None: # get
2197
return dbus.Boolean(self.checker is not None)
2198
if value:
2199
self.start_checker()
2200
else:
2201
self.stop_checker()
2202
2203
# ObjectPath - property
2204
@dbus_annotations(
2205
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2206
"org.freedesktop.DBus.Deprecated": "true"})
2207
@dbus_service_property(_interface, signature="o", access="read")
2208
def ObjectPath_dbus_property(self):
2209
return self.dbus_object_path # is already a dbus.ObjectPath
2210
2211
# Secret = property
2212
@dbus_annotations(
2213
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2214
"invalidates"})
2215
@dbus_service_property(_interface,
2216
signature="ay",
2217
access="write",
2218
byte_arrays=True)
2219
def Secret_dbus_property(self, value):
2220
self.secret = bytes(value)
2221
609
2222
del _interface
610
2223
611
2224
612
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
618
# ...do the normal thing
619
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
627
if list_size.value == 0:
628
return None
629
cert = cert_list[0]
630
return ctypes.string_at(cert.data, cert.size)
631
632
633
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
# New empty GnuTLS certificate
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
645
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
657
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
660
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
664
# Deinit the certificate
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
668
# Convert the bytestring to hexadecimal notation
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
return hex_fpr
671
672
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
674
"""A TCP request handler class.
675
Instantiated by IPv6_TCPServer for each request to handle it.
2225
class ProxyClient:
2226
def __init__(self, child_pipe, key_id, fpr, address):
2227
self._pipe = child_pipe
2228
self._pipe.send(('init', key_id, fpr, address))
2229
if not self._pipe.recv():
2230
raise KeyError(key_id or fpr)
2231
2232
def __getattribute__(self, name):
2233
if name == '_pipe':
2234
return super(ProxyClient, self).__getattribute__(name)
2235
self._pipe.send(('getattr', name))
2236
data = self._pipe.recv()
2237
if data[0] == 'data':
2238
return data[1]
2239
if data[0] == 'function':
2240
2241
def func(*args, **kwargs):
2242
self._pipe.send(('funcall', name, args, kwargs))
2243
return self._pipe.recv()[1]
2244
2245
return func
2246
2247
def __setattr__(self, name, value):
2248
if name == '_pipe':
2249
return super(ProxyClient, self).__setattr__(name, value)
2250
self._pipe.send(('setattr', name, value))
2251
2252
2253
class ClientHandler(socketserver.BaseRequestHandler, object):
2254
"""A class to handle client connections.
2255
2256
Instantiated once for each connection to handle it.
676
2257
Note: This will run in its own forked process."""
677
2258
678
2259
def handle(self):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
699
700
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
708
709
try:
710
session.handshake()
711
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
713
# Do not run session.bye() here: the session is not
714
# established. Just abandon the request.
715
return
716
logger.debug(u"Handshake succeeded")
717
try:
718
fpr = fingerprint(peer_certificate(session))
719
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
721
session.bye()
722
return
723
logger.debug(u"Fingerprint: %s", fpr)
724
725
for c in self.server.clients:
726
if c.fingerprint == fpr:
727
client = c
728
break
2260
with contextlib.closing(self.server.child_pipe) as child_pipe:
2261
logger.info("TCP connection from: %s",
2262
str(self.client_address))
2263
logger.debug("Pipe FD: %d",
2264
self.server.child_pipe.fileno())
2265
2266
session = gnutls.ClientSession(self.request)
2267
2268
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2269
# "+AES-256-CBC", "+SHA1",
2270
# "+COMP-NULL", "+CTYPE-OPENPGP",
2271
# "+DHE-DSS"))
2272
# Use a fallback default, since this MUST be set.
2273
priority = self.server.gnutls_priority
2274
if priority is None:
2275
priority = "NORMAL"
2276
gnutls.priority_set_direct(session._c_object,
2277
priority.encode("utf-8"),
2278
None)
2279
2280
# Start communication using the Mandos protocol
2281
# Get protocol number
2282
line = self.request.makefile().readline()
2283
logger.debug("Protocol version: %r", line)
2284
try:
2285
if int(line.strip().split()[0]) > 1:
2286
raise RuntimeError(line)
2287
except (ValueError, IndexError, RuntimeError) as error:
2288
logger.error("Unknown protocol version: %s", error)
2289
return
2290
2291
# Start GnuTLS connection
2292
try:
2293
session.handshake()
2294
except gnutls.Error as error:
2295
logger.warning("Handshake failed: %s", error)
2296
# Do not run session.bye() here: the session is not
2297
# established. Just abandon the request.
2298
return
2299
logger.debug("Handshake succeeded")
2300
2301
approval_required = False
2302
try:
2303
if gnutls.has_rawpk:
2304
fpr = b""
2305
try:
2306
key_id = self.key_id(
2307
self.peer_certificate(session))
2308
except (TypeError, gnutls.Error) as error:
2309
logger.warning("Bad certificate: %s", error)
2310
return
2311
logger.debug("Key ID: %s", key_id)
2312
2313
else:
2314
key_id = b""
2315
try:
2316
fpr = self.fingerprint(
2317
self.peer_certificate(session))
2318
except (TypeError, gnutls.Error) as error:
2319
logger.warning("Bad certificate: %s", error)
2320
return
2321
logger.debug("Fingerprint: %s", fpr)
2322
2323
try:
2324
client = ProxyClient(child_pipe, key_id, fpr,
2325
self.client_address)
2326
except KeyError:
2327
return
2328
2329
if client.approval_delay:
2330
delay = client.approval_delay
2331
client.approvals_pending += 1
2332
approval_required = True
2333
2334
while True:
2335
if not client.enabled:
2336
logger.info("Client %s is disabled",
2337
client.name)
2338
if self.server.use_dbus:
2339
# Emit D-Bus signal
2340
client.Rejected("Disabled")
2341
return
2342
2343
if client.approved or not client.approval_delay:
2344
# We are approved or approval is disabled
2345
break
2346
elif client.approved is None:
2347
logger.info("Client %s needs approval",
2348
client.name)
2349
if self.server.use_dbus:
2350
# Emit D-Bus signal
2351
client.NeedApproval(
2352
client.approval_delay.total_seconds()
2353
* 1000, client.approved_by_default)
2354
else:
2355
logger.warning("Client %s was not approved",
2356
client.name)
2357
if self.server.use_dbus:
2358
# Emit D-Bus signal
2359
client.Rejected("Denied")
2360
return
2361
2362
# wait until timeout or approved
2363
time = datetime.datetime.now()
2364
client.changedstate.acquire()
2365
client.changedstate.wait(delay.total_seconds())
2366
client.changedstate.release()
2367
time2 = datetime.datetime.now()
2368
if (time2 - time) >= delay:
2369
if not client.approved_by_default:
2370
logger.warning("Client %s timed out while"
2371
" waiting for approval",
2372
client.name)
2373
if self.server.use_dbus:
2374
# Emit D-Bus signal
2375
client.Rejected("Approval timed out")
2376
return
2377
else:
2378
break
2379
else:
2380
delay -= time2 - time
2381
2382
try:
2383
session.send(client.secret)
2384
except gnutls.Error as error:
2385
logger.warning("gnutls send failed",
2386
exc_info=error)
2387
return
2388
2389
logger.info("Sending secret to %s", client.name)
2390
# bump the timeout using extended_timeout
2391
client.bump_timeout(client.extended_timeout)
2392
if self.server.use_dbus:
2393
# Emit D-Bus signal
2394
client.GotSecret()
2395
2396
finally:
2397
if approval_required:
2398
client.approvals_pending -= 1
2399
try:
2400
session.bye()
2401
except gnutls.Error as error:
2402
logger.warning("GnuTLS bye failed",
2403
exc_info=error)
2404
2405
@staticmethod
2406
def peer_certificate(session):
2407
"Return the peer's certificate as a bytestring"
2408
try:
2409
cert_type = gnutls.certificate_type_get2(session._c_object,
2410
gnutls.CTYPE_PEERS)
2411
except AttributeError:
2412
cert_type = gnutls.certificate_type_get(session._c_object)
2413
if gnutls.has_rawpk:
2414
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
729
2415
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
# Have to check if client.still_valid(), since it is possible
735
# that the client timed out while establishing the GnuTLS
736
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
740
session.bye()
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
sent_size = 0
745
while sent_size < len(client.secret):
746
sent = session.send(client.secret[sent_size:])
747
logger.debug(u"Sent: %d, remaining: %d",
748
sent, len(client.secret)
749
- (sent_size + sent))
750
sent_size += sent
751
session.bye()
752
753
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
2416
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2417
# If not a valid certificate type...
2418
if cert_type not in valid_cert_types:
2419
logger.info("Cert type %r not in %r", cert_type,
2420
valid_cert_types)
2421
# ...return invalid data
2422
return b""
2423
list_size = ctypes.c_uint(1)
2424
cert_list = (gnutls.certificate_get_peers
2425
(session._c_object, ctypes.byref(list_size)))
2426
if not bool(cert_list) and list_size.value != 0:
2427
raise gnutls.Error("error getting peer certificate")
2428
if list_size.value == 0:
2429
return None
2430
cert = cert_list[0]
2431
return ctypes.string_at(cert.data, cert.size)
2432
2433
@staticmethod
2434
def key_id(certificate):
2435
"Convert a certificate bytestring to a hexdigit key ID"
2436
# New GnuTLS "datum" with the public key
2437
datum = gnutls.datum_t(
2438
ctypes.cast(ctypes.c_char_p(certificate),
2439
ctypes.POINTER(ctypes.c_ubyte)),
2440
ctypes.c_uint(len(certificate)))
2441
# XXX all these need to be created in the gnutls "module"
2442
# New empty GnuTLS certificate
2443
pubkey = gnutls.pubkey_t()
2444
gnutls.pubkey_init(ctypes.byref(pubkey))
2445
# Import the raw public key into the certificate
2446
gnutls.pubkey_import(pubkey,
2447
ctypes.byref(datum),
2448
gnutls.X509_FMT_DER)
2449
# New buffer for the key ID
2450
buf = ctypes.create_string_buffer(32)
2451
buf_len = ctypes.c_size_t(len(buf))
2452
# Get the key ID from the raw public key into the buffer
2453
gnutls.pubkey_get_key_id(pubkey,
2454
gnutls.KEYID_USE_SHA256,
2455
ctypes.cast(ctypes.byref(buf),
2456
ctypes.POINTER(ctypes.c_ubyte)),
2457
ctypes.byref(buf_len))
2458
# Deinit the certificate
2459
gnutls.pubkey_deinit(pubkey)
2460
2461
# Convert the buffer to a Python bytestring
2462
key_id = ctypes.string_at(buf, buf_len.value)
2463
# Convert the bytestring to hexadecimal notation
2464
hex_key_id = binascii.hexlify(key_id).upper()
2465
return hex_key_id
2466
2467
@staticmethod
2468
def fingerprint(openpgp):
2469
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2470
# New GnuTLS "datum" with the OpenPGP public key
2471
datum = gnutls.datum_t(
2472
ctypes.cast(ctypes.c_char_p(openpgp),
2473
ctypes.POINTER(ctypes.c_ubyte)),
2474
ctypes.c_uint(len(openpgp)))
2475
# New empty GnuTLS certificate
2476
crt = gnutls.openpgp_crt_t()
2477
gnutls.openpgp_crt_init(ctypes.byref(crt))
2478
# Import the OpenPGP public key into the certificate
2479
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2480
gnutls.OPENPGP_FMT_RAW)
2481
# Verify the self signature in the key
2482
crtverify = ctypes.c_uint()
2483
gnutls.openpgp_crt_verify_self(crt, 0,
2484
ctypes.byref(crtverify))
2485
if crtverify.value != 0:
2486
gnutls.openpgp_crt_deinit(crt)
2487
raise gnutls.CertificateSecurityError(code
2488
=crtverify.value)
2489
# New buffer for the fingerprint
2490
buf = ctypes.create_string_buffer(20)
2491
buf_len = ctypes.c_size_t()
2492
# Get the fingerprint from the certificate into the buffer
2493
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2494
ctypes.byref(buf_len))
2495
# Deinit the certificate
2496
gnutls.openpgp_crt_deinit(crt)
2497
# Convert the buffer to a Python bytestring
2498
fpr = ctypes.string_at(buf, buf_len.value)
2499
# Convert the bytestring to hexadecimal notation
2500
hex_fpr = binascii.hexlify(fpr).upper()
2501
return hex_fpr
2502
2503
2504
class MultiprocessingMixIn:
2505
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2506
2507
def sub_process_main(self, request, address):
2508
try:
2509
self.finish_request(request, address)
2510
except Exception:
2511
self.handle_error(request, address)
2512
self.close_request(request)
2513
2514
def process_request(self, request, address):
2515
"""Start a new process to process the request."""
2516
proc = multiprocessing.Process(target=self.sub_process_main,
2517
args=(request, address))
2518
proc.start()
2519
return proc
2520
2521
2522
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2523
""" adds a pipe to the MixIn """
2524
2525
def process_request(self, request, client_address):
2526
"""Overrides and wraps the original process_request().
2527
2528
This function creates a new pipe in self.pipe
2529
"""
2530
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2531
2532
proc = MultiprocessingMixIn.process_request(self, request,
2533
client_address)
2534
self.child_pipe.close()
2535
self.add_pipe(parent_pipe, proc)
2536
2537
def add_pipe(self, parent_pipe, proc):
2538
"""Dummy function; override as necessary"""
2539
raise NotImplementedError()
2540
2541
2542
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2543
socketserver.TCPServer):
756
2544
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2545
757
2546
Attributes:
758
settings: Server settings
759
clients: Set() of Client objects
760
2547
enabled: Boolean; whether this server is activated yet
2548
interface: None or a network interface name (string)
2549
use_ipv6: Boolean; to use IPv6 or not
761
2550
"""
762
address_family = socket.AF_INET6
763
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
767
if "clients" in kwargs:
768
self.clients = kwargs["clients"]
769
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2551
2552
def __init__(self, server_address, RequestHandlerClass,
2553
interface=None,
2554
use_ipv6=True,
2555
socketfd=None):
2556
"""If socketfd is set, use that file descriptor instead of
2557
creating a new one with socket.socket().
2558
"""
2559
self.interface = interface
2560
if use_ipv6:
2561
self.address_family = socket.AF_INET6
2562
if socketfd is not None:
2563
# Save the file descriptor
2564
self.socketfd = socketfd
2565
# Save the original socket.socket() function
2566
self.socket_socket = socket.socket
2567
2568
# To implement --socket, we monkey patch socket.socket.
2569
#
2570
# (When socketserver.TCPServer is a new-style class, we
2571
# could make self.socket into a property instead of monkey
2572
# patching socket.socket.)
2573
#
2574
# Create a one-time-only replacement for socket.socket()
2575
@functools.wraps(socket.socket)
2576
def socket_wrapper(*args, **kwargs):
2577
# Restore original function so subsequent calls are
2578
# not affected.
2579
socket.socket = self.socket_socket
2580
del self.socket_socket
2581
# This time only, return a new socket object from the
2582
# saved file descriptor.
2583
return socket.fromfd(self.socketfd, *args, **kwargs)
2584
# Replace socket.socket() function with wrapper
2585
socket.socket = socket_wrapper
2586
# The socketserver.TCPServer.__init__ will call
2587
# socket.socket(), which might be our replacement,
2588
# socket_wrapper(), if socketfd was set.
2589
socketserver.TCPServer.__init__(self, server_address,
2590
RequestHandlerClass)
2591
776
2592
def server_bind(self):
777
2593
"""This overrides the normal server_bind() function
778
2594
to bind to an interface if one was specified, and also NOT to
779
2595
bind to an address or port if they were not specified."""
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2596
global SO_BINDTODEVICE
2597
if self.interface is not None:
2598
if SO_BINDTODEVICE is None:
2599
# Fall back to a hard-coded value which seems to be
2600
# common enough.
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
783
2603
try:
784
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
787
except socket.error, error:
788
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2614
self.interface)
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" cannot bind", self.interface)
792
2618
else:
793
2619
raise
794
2620
# Only bind(2) the socket if we really need to.
795
2621
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
796
2624
if not self.server_address[0]:
797
2625
if self.address_family == socket.AF_INET6:
798
any_address = "::" # in6addr_any
2626
any_address = "::" # in6addr_any
799
2627
else:
800
any_address = socket.INADDR_ANY
2628
any_address = "0.0.0.0" # INADDR_ANY
801
2629
self.server_address = (any_address,
802
2630
self.server_address[1])
803
2631
elif not self.server_address[1]:
804
self.server_address = (self.server_address[0],
805
0)
806
# if self.settings["interface"]:
2632
self.server_address = (self.server_address[0], 0)
2633
# if self.interface:
807
2634
# self.server_address = (self.server_address[0],
808
2635
# 0, # port
809
2636
# 0, # flowinfo
810
2637
# if_nametoindex
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
2638
# (self.interface))
2639
return socketserver.TCPServer.server_bind(self)
2640
2641
2642
class MandosServer(IPv6_TCPServer):
2643
"""Mandos server.
2644
2645
Attributes:
2646
clients: set of Client objects
2647
gnutls_priority GnuTLS priority string
2648
use_dbus: Boolean; to emit D-Bus signals or not
2649
2650
Assumes a GLib.MainLoop event loop.
2651
"""
2652
2653
def __init__(self, server_address, RequestHandlerClass,
2654
interface=None,
2655
use_ipv6=True,
2656
clients=None,
2657
gnutls_priority=None,
2658
use_dbus=True,
2659
socketfd=None):
2660
self.enabled = False
2661
self.clients = clients
2662
if self.clients is None:
2663
self.clients = {}
2664
self.use_dbus = use_dbus
2665
self.gnutls_priority = gnutls_priority
2666
IPv6_TCPServer.__init__(self, server_address,
2667
RequestHandlerClass,
2668
interface=interface,
2669
use_ipv6=use_ipv6,
2670
socketfd=socketfd)
2671
814
2672
def server_activate(self):
815
2673
if self.enabled:
816
return super(IPv6_TCPServer, self).server_activate()
2674
return socketserver.TCPServer.server_activate(self)
2675
817
2676
def enable(self):
818
2677
self.enabled = True
819
2678
2679
def add_pipe(self, parent_pipe, proc):
2680
# Call "handle_ipc" for both data and EOF events
2681
GLib.io_add_watch(
2682
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2683
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2684
functools.partial(self.handle_ipc,
2685
parent_pipe=parent_pipe,
2686
proc=proc))
2687
2688
def handle_ipc(self, source, condition,
2689
parent_pipe=None,
2690
proc=None,
2691
client_object=None):
2692
# error, or the other end of multiprocessing.Pipe has closed
2693
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2694
# Wait for other process to exit
2695
proc.join()
2696
return False
2697
2698
# Read a request from the child
2699
request = parent_pipe.recv()
2700
command = request[0]
2701
2702
if command == 'init':
2703
key_id = request[1].decode("ascii")
2704
fpr = request[2].decode("ascii")
2705
address = request[3]
2706
2707
for c in self.clients.values():
2708
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2709
continue
2710
if key_id and c.key_id == key_id:
2711
client = c
2712
break
2713
if fpr and c.fingerprint == fpr:
2714
client = c
2715
break
2716
else:
2717
logger.info("Client not found for key ID: %s, address"
2718
": %s", key_id or fpr, address)
2719
if self.use_dbus:
2720
# Emit D-Bus signal
2721
mandos_dbus_service.ClientNotFound(key_id or fpr,
2722
address[0])
2723
parent_pipe.send(False)
2724
return False
2725
2726
GLib.io_add_watch(
2727
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2728
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2729
functools.partial(self.handle_ipc,
2730
parent_pipe=parent_pipe,
2731
proc=proc,
2732
client_object=client))
2733
parent_pipe.send(True)
2734
# remove the old hook in favor of the new above hook on
2735
# same fileno
2736
return False
2737
if command == 'funcall':
2738
funcname = request[1]
2739
args = request[2]
2740
kwargs = request[3]
2741
2742
parent_pipe.send(('data', getattr(client_object,
2743
funcname)(*args,
2744
**kwargs)))
2745
2746
if command == 'getattr':
2747
attrname = request[1]
2748
if isinstance(client_object.__getattribute__(attrname),
2749
collections.Callable):
2750
parent_pipe.send(('function', ))
2751
else:
2752
parent_pipe.send((
2753
'data', client_object.__getattribute__(attrname)))
2754
2755
if command == 'setattr':
2756
attrname = request[1]
2757
value = request[2]
2758
setattr(client_object, attrname, value)
2759
2760
return True
2761
2762
2763
def rfc3339_duration_to_delta(duration):
2764
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2765
2766
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2767
True
2768
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2769
True
2770
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2771
True
2772
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2773
True
2774
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2775
True
2776
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2777
True
2778
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2779
True
2780
"""
2781
2782
# Parsing an RFC 3339 duration with regular expressions is not
2783
# possible - there would have to be multiple places for the same
2784
# values, like seconds. The current code, while more esoteric, is
2785
# cleaner without depending on a parsing library. If Python had a
2786
# built-in library for parsing we would use it, but we'd like to
2787
# avoid excessive use of external libraries.
2788
2789
# New type for defining tokens, syntax, and semantics all-in-one
2790
Token = collections.namedtuple("Token", (
2791
"regexp", # To match token; if "value" is not None, must have
2792
# a "group" containing digits
2793
"value", # datetime.timedelta or None
2794
"followers")) # Tokens valid after this token
2795
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2796
# the "duration" ABNF definition in RFC 3339, Appendix A.
2797
token_end = Token(re.compile(r"$"), None, frozenset())
2798
token_second = Token(re.compile(r"(\d+)S"),
2799
datetime.timedelta(seconds=1),
2800
frozenset((token_end, )))
2801
token_minute = Token(re.compile(r"(\d+)M"),
2802
datetime.timedelta(minutes=1),
2803
frozenset((token_second, token_end)))
2804
token_hour = Token(re.compile(r"(\d+)H"),
2805
datetime.timedelta(hours=1),
2806
frozenset((token_minute, token_end)))
2807
token_time = Token(re.compile(r"T"),
2808
None,
2809
frozenset((token_hour, token_minute,
2810
token_second)))
2811
token_day = Token(re.compile(r"(\d+)D"),
2812
datetime.timedelta(days=1),
2813
frozenset((token_time, token_end)))
2814
token_month = Token(re.compile(r"(\d+)M"),
2815
datetime.timedelta(weeks=4),
2816
frozenset((token_day, token_end)))
2817
token_year = Token(re.compile(r"(\d+)Y"),
2818
datetime.timedelta(weeks=52),
2819
frozenset((token_month, token_end)))
2820
token_week = Token(re.compile(r"(\d+)W"),
2821
datetime.timedelta(weeks=1),
2822
frozenset((token_end, )))
2823
token_duration = Token(re.compile(r"P"), None,
2824
frozenset((token_year, token_month,
2825
token_day, token_time,
2826
token_week)))
2827
# Define starting values:
2828
# Value so far
2829
value = datetime.timedelta()
2830
found_token = None
2831
# Following valid tokens
2832
followers = frozenset((token_duration, ))
2833
# String left to parse
2834
s = duration
2835
# Loop until end token is found
2836
while found_token is not token_end:
2837
# Search for any currently valid tokens
2838
for token in followers:
2839
match = token.regexp.match(s)
2840
if match is not None:
2841
# Token found
2842
if token.value is not None:
2843
# Value found, parse digits
2844
factor = int(match.group(1), 10)
2845
# Add to value so far
2846
value += factor * token.value
2847
# Strip token from string
2848
s = token.regexp.sub("", s, 1)
2849
# Go to found token
2850
found_token = token
2851
# Set valid next tokens
2852
followers = found_token.followers
2853
break
2854
else:
2855
# No currently valid tokens were found
2856
raise ValueError("Invalid RFC 3339 duration: {!r}"
2857
.format(duration))
2858
# End token found
2859
return value
2860
820
2861
821
2862
def string_to_delta(interval):
822
2863
"""Parse a string and return a datetime.timedelta
823
824
>>> string_to_delta('7d')
825
datetime.timedelta(7)
826
>>> string_to_delta('60s')
827
datetime.timedelta(0, 60)
828
>>> string_to_delta('60m')
829
datetime.timedelta(0, 3600)
830
>>> string_to_delta('24h')
831
datetime.timedelta(1)
832
>>> string_to_delta(u'1w')
833
datetime.timedelta(7)
834
>>> string_to_delta('5m 30s')
835
datetime.timedelta(0, 330)
2864
2865
>>> string_to_delta('7d') == datetime.timedelta(7)
2866
True
2867
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2868
True
2869
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2870
True
2871
>>> string_to_delta('24h') == datetime.timedelta(1)
2872
True
2873
>>> string_to_delta('1w') == datetime.timedelta(7)
2874
True
2875
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2876
True
836
2877
"""
2878
2879
try:
2880
return rfc3339_duration_to_delta(interval)
2881
except ValueError:
2882
pass
2883
837
2884
timevalue = datetime.timedelta(0)
838
2885
for s in interval.split():
839
2886
try:
840
suffix = unicode(s[-1])
2887
suffix = s[-1]
841
2888
value = int(s[:-1])
842
if suffix == u"d":
2889
if suffix == "d":
843
2890
delta = datetime.timedelta(value)
844
elif suffix == u"s":
2891
elif suffix == "s":
845
2892
delta = datetime.timedelta(0, value)
846
elif suffix == u"m":
2893
elif suffix == "m":
847
2894
delta = datetime.timedelta(0, 0, 0, 0, value)
848
elif suffix == u"h":
2895
elif suffix == "h":
849
2896
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
elif suffix == u"w":
2897
elif suffix == "w":
851
2898
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
2899
else:
853
raise ValueError
854
except (ValueError, IndexError):
855
raise ValueError
2900
raise ValueError("Unknown suffix {!r}".format(suffix))
2901
except IndexError as e:
2902
raise ValueError(*(e.args))
856
2903
timevalue += delta
857
2904
return timevalue
858
2905
859
2906
860
def server_state_changed(state):
861
"""Derived from the Avahi example code"""
862
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
865
elif state == avahi.SERVER_RUNNING:
866
service.add()
867
868
869
def entry_group_state_changed(state, error):
870
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
872
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
875
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
878
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
882
883
def if_nametoindex(interface):
884
"""Call the C function if_nametoindex(), or equivalent"""
885
global if_nametoindex
886
try:
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
890
except (OSError, AttributeError):
891
if "struct" not in sys.modules:
892
import struct
893
if "fcntl" not in sys.modules:
894
import fcntl
895
def if_nametoindex(interface):
896
"Get an interface index the hard way, i.e. using fcntl()"
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
return interface_index
903
return if_nametoindex(interface)
904
905
906
def daemon(nochdir = False, noclose = False):
2907
def daemon(nochdir=False, noclose=False):
907
2908
"""See daemon(3). Standard BSD Unix function.
2909
908
2910
This should really exist as os.daemon, but it doesn't (yet)."""
909
2911
if os.fork():
910
2912
sys.exit()
915
2917
sys.exit()
916
2918
if not noclose:
917
2919
# Close all standard open file descriptors
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2920
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
919
2921
if not stat.S_ISCHR(os.fstat(null).st_mode):
920
2922
raise OSError(errno.ENODEV,
921
"/dev/null not a character device")
2923
"{} not a character device"
2924
.format(os.devnull))
922
2925
os.dup2(null, sys.stdin.fileno())
923
2926
os.dup2(null, sys.stdout.fileno())
924
2927
os.dup2(null, sys.stderr.fileno())
927
2930
928
2931
929
2932
def main():
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
931
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
934
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
936
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
938
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
956
options = parser.parse_args()[0]
957
958
if options.check:
959
import doctest
960
doctest.testmod()
961
sys.exit()
962
2933
2934
##################################################################
2935
# Parsing of options, both command line and config file
2936
2937
parser = argparse.ArgumentParser()
2938
parser.add_argument("-v", "--version", action="version",
2939
version="%(prog)s {}".format(version),
2940
help="show version number and exit")
2941
parser.add_argument("-i", "--interface", metavar="IF",
2942
help="Bind to interface IF")
2943
parser.add_argument("-a", "--address",
2944
help="Address to listen for requests on")
2945
parser.add_argument("-p", "--port", type=int,
2946
help="Port number to receive requests on")
2947
parser.add_argument("--check", action="store_true",
2948
help="Run self-test")
2949
parser.add_argument("--debug", action="store_true",
2950
help="Debug mode; run in foreground and log"
2951
" to terminal", default=None)
2952
parser.add_argument("--debuglevel", metavar="LEVEL",
2953
help="Debug level for stdout output")
2954
parser.add_argument("--priority", help="GnuTLS"
2955
" priority string (see GnuTLS documentation)")
2956
parser.add_argument("--servicename",
2957
metavar="NAME", help="Zeroconf service name")
2958
parser.add_argument("--configdir",
2959
default="/etc/mandos", metavar="DIR",
2960
help="Directory to search for configuration"
2961
" files")
2962
parser.add_argument("--no-dbus", action="store_false",
2963
dest="use_dbus", help="Do not provide D-Bus"
2964
" system bus interface", default=None)
2965
parser.add_argument("--no-ipv6", action="store_false",
2966
dest="use_ipv6", help="Do not use IPv6",
2967
default=None)
2968
parser.add_argument("--no-restore", action="store_false",
2969
dest="restore", help="Do not restore stored"
2970
" state", default=None)
2971
parser.add_argument("--socket", type=int,
2972
help="Specify a file descriptor to a network"
2973
" socket to use instead of creating one")
2974
parser.add_argument("--statedir", metavar="DIR",
2975
help="Directory to save/restore state in")
2976
parser.add_argument("--foreground", action="store_true",
2977
help="Run in foreground", default=None)
2978
parser.add_argument("--no-zeroconf", action="store_false",
2979
dest="zeroconf", help="Do not use Zeroconf",
2980
default=None)
2981
2982
options = parser.parse_args()
2983
963
2984
# Default values for config file for server-global settings
964
server_defaults = { "interface": "",
965
"address": "",
966
"port": "",
967
"debug": "False",
968
"priority":
969
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
970
"servicename": "Mandos",
971
"use_dbus": "True",
972
"use_ipv6": "True",
973
}
974
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
975
3008
# Parse config file for server-global settings
976
server_config = ConfigParser.SafeConfigParser(server_defaults)
3009
server_config = configparser.ConfigParser(server_defaults)
977
3010
del server_defaults
978
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
979
# Convert the SafeConfigParser object to a dict
3012
# Convert the ConfigParser object to a dict
980
3013
server_settings = server_config.defaults()
981
3014
# Use the appropriate methods on the non-string config options
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
3017
server_settings[option] = server_config.getboolean("DEFAULT",
3018
option)
988
3019
if server_settings["port"]:
989
3020
server_settings["port"] = server_config.getint("DEFAULT",
990
3021
"port")
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3024
"socket")
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
3030
["socket"])
991
3031
del server_config
992
3032
993
3033
# Override the settings from the config file with command line
994
3034
# options, if set.
995
3035
for option in ("interface", "address", "port", "debug",
996
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
998
3039
value = getattr(options, option)
999
3040
if value is not None:
1000
3041
server_settings[option] = value
1001
3042
del options
3043
# Force all strings to be unicode
3044
for option in server_settings.keys():
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1002
3055
# Now we have our good server settings in "server_settings"
1003
3056
3057
##################################################################
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
1004
3064
# For convenience
1005
3065
debug = server_settings["debug"]
3066
debuglevel = server_settings["debuglevel"]
1006
3067
use_dbus = server_settings["use_dbus"]
1007
3068
use_ipv6 = server_settings["use_ipv6"]
1008
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
1012
3069
stored_state_path = os.path.join(server_settings["statedir"],
3070
stored_state_file)
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
3074
if debug:
3075
initlogger(debug, logging.DEBUG)
3076
else:
3077
if not debuglevel:
3078
initlogger(debug)
3079
else:
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
3082
1013
3083
if server_settings["servicename"] != "Mandos":
1014
syslogger.setFormatter(logging.Formatter
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1017
% server_settings["servicename"]))
1018
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
1019
3089
# Parse config file with clients
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1024
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
3090
client_config = configparser.ConfigParser(Client.client_defaults)
1026
3091
client_config.read(os.path.join(server_settings["configdir"],
1027
3092
"clients.conf"))
1028
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
1040
1041
try:
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1044
except KeyError:
1045
try:
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
3093
3094
global mandos_dbus_service
3095
mandos_dbus_service = None
3096
3097
socketfd = None
3098
if server_settings["socket"] != "":
3099
socketfd = server_settings["socket"]
3100
tcp_server = MandosServer(
3101
(server_settings["address"], server_settings["port"]),
3102
ClientHandler,
3103
interface=(server_settings["interface"] or None),
3104
use_ipv6=use_ipv6,
3105
gnutls_priority=server_settings["priority"],
3106
use_dbus=use_dbus,
3107
socketfd=socketfd)
3108
if not foreground:
3109
pidfilename = "/run/mandos.pid"
3110
if not os.path.isdir("/run/."):
3111
pidfilename = "/var/run/mandos.pid"
3112
pidfile = None
3113
try:
3114
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3115
except IOError as e:
3116
logger.error("Could not open file %r", pidfilename,
3117
exc_info=e)
3118
3119
for name, group in (("_mandos", "_mandos"),
3120
("mandos", "mandos"),
3121
("nobody", "nogroup")):
3122
try:
3123
uid = pwd.getpwnam(name).pw_uid
3124
gid = pwd.getpwnam(group).pw_gid
3125
break
1048
3126
except KeyError:
1049
try:
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1052
except KeyError:
1053
uid = 65534
1054
gid = 65534
3127
continue
3128
else:
3129
uid = 65534
3130
gid = 65534
1055
3131
try:
1056
3132
os.setgid(gid)
1057
3133
os.setuid(uid)
1058
except OSError, error:
1059
if error[0] != errno.EPERM:
1060
raise error
1061
1062
# Enable all possible GnuTLS debugging
3134
if debug:
3135
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3136
gid))
3137
except OSError as error:
3138
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3139
.format(uid, gid, os.strerror(error.errno)))
3140
if error.errno != errno.EPERM:
3141
raise
3142
1063
3143
if debug:
3144
# Enable all possible GnuTLS debugging
3145
1064
3146
# "Use a log level over 10 to enable all debugging options."
1065
3147
# - GnuTLS manual
1066
gnutls.library.functions.gnutls_global_set_log_level(11)
1067
1068
@gnutls.library.types.gnutls_log_func
3148
gnutls.global_set_log_level(11)
3149
3150
@gnutls.log_func
1069
3151
def debug_gnutls(level, string):
1070
3152
logger.debug("GnuTLS: %s", string[:-1])
1071
1072
(gnutls.library.functions
1073
.gnutls_global_set_log_function(debug_gnutls))
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
1083
3153
3154
gnutls.global_set_log_function(debug_gnutls)
3155
3156
# Redirect stdin so all checkers get /dev/null
3157
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3158
os.dup2(null, sys.stdin.fileno())
3159
if null > 2:
3160
os.close(null)
3161
3162
# Need to fork before connecting to D-Bus
3163
if not foreground:
3164
# Close all input and output, do double fork, etc.
3165
daemon()
3166
3167
if gi.version_info < (3, 10, 2):
3168
# multiprocessing will use threads, so before we use GLib we
3169
# need to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
1084
3172
global main_loop
1085
global bus
1086
global server
1087
3173
# From the Avahi example code
1088
DBusGMainLoop(set_as_default=True )
1089
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
1090
3176
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
1094
3177
# End of Avahi example code
1095
3178
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
1102
for section in client_config.sections()))
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
3179
try:
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
3188
use_dbus = False
3189
server_settings["use_dbus"] = False
3190
tcp_server.use_dbus = False
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
3202
global multiprocessing_manager
3203
multiprocessing_manager = multiprocessing.Manager()
3204
3205
client_class = Client
3206
if use_dbus:
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
3209
client_settings = Client.config_parser(client_config)
3210
old_client_settings = {}
3211
clients_data = {}
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
3221
# Get client data and settings from last running state.
3222
if server_settings["restore"]:
3223
try:
3224
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host and .checker_command
3270
for value in old_client_settings.values():
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
3274
.decode("utf-8"))
3275
os.remove(stored_state_path)
3276
except IOError as e:
3277
if e.errno == errno.ENOENT:
3278
logger.warning("Could not load persistent state:"
3279
" {}".format(os.strerror(e.errno)))
3280
else:
3281
logger.critical("Could not load persistent state:",
3282
exc_info=e)
3283
raise
3284
except EOFError as e:
3285
logger.warning("Could not load persistent state: "
3286
"EOFError:",
3287
exc_info=e)
3288
3289
with PGPEngine() as pgp:
3290
for client_name, client in clients_data.items():
3291
# Skip removed clients
3292
if client_name not in client_settings:
3293
continue
3294
3295
# Decide which value to use after restoring saved state.
3296
# We have three different values: Old config file,
3297
# new config file, and saved state.
3298
# New config value takes precedence if it differs from old
3299
# config value, otherwise use saved state.
3300
for name, value in client_settings[client_name].items():
3301
try:
3302
# For each value in new config, check if it
3303
# differs from the old config value (Except for
3304
# the "secret" attribute)
3305
if (name != "secret"
3306
and (value !=
3307
old_client_settings[client_name][name])):
3308
client[name] = value
3309
except KeyError:
3310
pass
3311
3312
# Clients who has passed its expire date can still be
3313
# enabled if its last checker was successful. A Client
3314
# whose checker succeeded before we stored its state is
3315
# assumed to have successfully run all checkers during
3316
# downtime.
3317
if client["enabled"]:
3318
if datetime.datetime.utcnow() >= client["expires"]:
3319
if not client["last_checked_ok"]:
3320
logger.warning(
3321
"disabling client {} - Client never "
3322
"performed a successful checker".format(
3323
client_name))
3324
client["enabled"] = False
3325
elif client["last_checker_status"] != 0:
3326
logger.warning(
3327
"disabling client {} - Client last"
3328
" checker failed with error code"
3329
" {}".format(
3330
client_name,
3331
client["last_checker_status"]))
3332
client["enabled"] = False
3333
else:
3334
client["expires"] = (
3335
datetime.datetime.utcnow()
3336
+ client["timeout"])
3337
logger.debug("Last checker succeeded,"
3338
" keeping {} enabled".format(
3339
client_name))
3340
try:
3341
client["secret"] = pgp.decrypt(
3342
client["encrypted_secret"],
3343
client_settings[client_name]["secret"])
3344
except PGPError:
3345
# If decryption fails, we use secret from new settings
3346
logger.debug("Failed to decrypt {} old secret".format(
3347
client_name))
3348
client["secret"] = (client_settings[client_name]
3349
["secret"])
3350
3351
# Add/remove clients based on new changes made to config
3352
for client_name in (set(old_client_settings)
3353
- set(client_settings)):
3354
del clients_data[client_name]
3355
for client_name in (set(client_settings)
3356
- set(old_client_settings)):
3357
clients_data[client_name] = client_settings[client_name]
3358
3359
# Create all client objects
3360
for client_name, client in clients_data.items():
3361
tcp_server.clients[client_name] = client_class(
3362
name=client_name,
3363
settings=client,
3364
server_settings=server_settings)
3365
3366
if not tcp_server.clients:
3367
logger.warning("No clients defined")
3368
3369
if not foreground:
3370
if pidfile is not None:
3371
pid = os.getpid()
3372
try:
3373
with pidfile:
3374
print(pid, file=pidfile)
3375
except IOError:
3376
logger.error("Could not write to file %r with PID %d",
3377
pidfilename, pid)
1122
3378
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
1130
1131
def cleanup():
1132
"Cleanup function; run on exit"
1133
global group
1134
# From the Avahi example code
1135
if not group is None:
1136
group.Free()
1137
group = None
1138
# End of Avahi example code
1139
1140
while clients:
1141
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
1144
1145
atexit.register(cleanup)
1146
1147
if not debug:
1148
signal.signal(signal.SIGINT, signal.SIG_IGN)
1149
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
3379
del pidfilename
3380
3381
for termsig in (signal.SIGHUP, signal.SIGTERM):
3382
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3383
lambda: main_loop.quit() and False)
3384
1152
3385
if use_dbus:
1153
class MandosServer(dbus.service.Object):
3386
3387
@alternate_dbus_interfaces(
3388
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3389
class MandosDBusService(DBusObjectWithObjectManager):
1154
3390
"""A D-Bus proxy object"""
3391
1155
3392
def __init__(self):
1156
3393
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
1161
"D-Bus signal"
1162
pass
1163
3394
3395
_interface = "se.recompile.Mandos"
3396
3397
@dbus.service.signal(_interface, signature="o")
3398
def ClientAdded(self, objpath):
3399
"D-Bus signal"
3400
pass
3401
3402
@dbus.service.signal(_interface, signature="ss")
3403
def ClientNotFound(self, key_id, address):
3404
"D-Bus signal"
3405
pass
3406
3407
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3408
"true"})
1164
3409
@dbus.service.signal(_interface, signature="os")
1165
3410
def ClientRemoved(self, objpath, name):
1166
3411
"D-Bus signal"
1167
3412
pass
1168
3413
3414
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3415
"true"})
1169
3416
@dbus.service.method(_interface, out_signature="ao")
1170
3417
def GetAllClients(self):
1171
3418
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
1173
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3419
return dbus.Array(c.dbus_object_path for c in
3420
tcp_server.clients.values())
3421
3422
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3423
"true"})
3424
@dbus.service.method(_interface,
3425
out_signature="a{oa{sv}}")
1175
3426
def GetAllClientsWithProperties(self):
1176
3427
"D-Bus method"
1177
3428
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
3429
{c.dbus_object_path: c.GetAll(
3430
"se.recompile.Mandos.Client")
3431
for c in tcp_server.clients.values()},
1180
3432
signature="oa{sv}")
1181
3433
1182
3434
@dbus.service.method(_interface, in_signature="o")
1183
3435
def RemoveClient(self, object_path):
1184
3436
"D-Bus method"
1185
for c in clients:
3437
for c in tcp_server.clients.values():
1186
3438
if c.dbus_object_path == object_path:
1187
clients.remove(c)
1188
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
1191
# Emit D-Bus signal
1192
self.ClientRemoved(object_path, c.name)
3439
del tcp_server.clients[c.name]
3440
c.remove_from_connection()
3441
# Don't signal the disabling
3442
c.disable(quiet=True)
3443
# Emit D-Bus signal for removal
3444
self.client_removed_signal(c)
1193
3445
return
1194
raise KeyError
1195
3446
raise KeyError(object_path)
3447
1196
3448
del _interface
1197
1198
mandos_server = MandosServer()
1199
1200
for client in clients:
3449
3450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3451
out_signature="a{oa{sa{sv}}}")
3452
def GetManagedObjects(self):
3453
"""D-Bus method"""
3454
return dbus.Dictionary(
3455
{client.dbus_object_path:
3456
dbus.Dictionary(
3457
{interface: client.GetAll(interface)
3458
for interface in
3459
client._get_all_interface_names()})
3460
for client in tcp_server.clients.values()})
3461
3462
def client_added_signal(self, client):
3463
"""Send the new standard signal and the old signal"""
3464
if use_dbus:
3465
# New standard signal
3466
self.InterfacesAdded(
3467
client.dbus_object_path,
3468
dbus.Dictionary(
3469
{interface: client.GetAll(interface)
3470
for interface in
3471
client._get_all_interface_names()}))
3472
# Old signal
3473
self.ClientAdded(client.dbus_object_path)
3474
3475
def client_removed_signal(self, client):
3476
"""Send the new standard signal and the old signal"""
3477
if use_dbus:
3478
# New standard signal
3479
self.InterfacesRemoved(
3480
client.dbus_object_path,
3481
client._get_all_interface_names())
3482
# Old signal
3483
self.ClientRemoved(client.dbus_object_path,
3484
client.name)
3485
3486
mandos_dbus_service = MandosDBusService()
3487
3488
# Save modules to variables to exempt the modules from being
3489
# unloaded before the function registered with atexit() is run.
3490
mp = multiprocessing
3491
wn = wnull
3492
3493
def cleanup():
3494
"Cleanup function; run on exit"
3495
if zeroconf:
3496
service.cleanup()
3497
3498
mp.active_children()
3499
wn.close()
3500
if not (tcp_server.clients or client_settings):
3501
return
3502
3503
# Store client before exiting. Secrets are encrypted with key
3504
# based on what config file has. If config file is
3505
# removed/edited, old secret will thus be unrecovable.
3506
clients = {}
3507
with PGPEngine() as pgp:
3508
for client in tcp_server.clients.values():
3509
key = client_settings[client.name]["secret"]
3510
client.encrypted_secret = pgp.encrypt(client.secret,
3511
key)
3512
client_dict = {}
3513
3514
# A list of attributes that can not be pickled
3515
# + secret.
3516
exclude = {"bus", "changedstate", "secret",
3517
"checker", "server_settings"}
3518
for name, typ in inspect.getmembers(dbus.service
3519
.Object):
3520
exclude.add(name)
3521
3522
client_dict["encrypted_secret"] = (client
3523
.encrypted_secret)
3524
for attr in client.client_structure:
3525
if attr not in exclude:
3526
client_dict[attr] = getattr(client, attr)
3527
3528
clients[client.name] = client_dict
3529
del client_settings[client.name]["secret"]
3530
3531
try:
3532
with tempfile.NamedTemporaryFile(
3533
mode='wb',
3534
suffix=".pickle",
3535
prefix='clients-',
3536
dir=os.path.dirname(stored_state_path),
3537
delete=False) as stored_state:
3538
pickle.dump((clients, client_settings), stored_state,
3539
protocol=2)
3540
tempname = stored_state.name
3541
os.rename(tempname, stored_state_path)
3542
except (IOError, OSError) as e:
3543
if not debug:
3544
try:
3545
os.remove(tempname)
3546
except NameError:
3547
pass
3548
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3549
logger.warning("Could not save persistent state: {}"
3550
.format(os.strerror(e.errno)))
3551
else:
3552
logger.warning("Could not save persistent state:",
3553
exc_info=e)
3554
raise
3555
3556
# Delete all clients, and settings from config
3557
while tcp_server.clients:
3558
name, client = tcp_server.clients.popitem()
3559
if use_dbus:
3560
client.remove_from_connection()
3561
# Don't signal the disabling
3562
client.disable(quiet=True)
3563
# Emit D-Bus signal for removal
3564
if use_dbus:
3565
mandos_dbus_service.client_removed_signal(client)
3566
client_settings.clear()
3567
3568
atexit.register(cleanup)
3569
3570
for client in tcp_server.clients.values():
1201
3571
if use_dbus:
1202
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
1206
3572
# Emit D-Bus signal for adding
3573
mandos_dbus_service.client_added_signal(client)
3574
# Need to initiate checking of clients
3575
if client.enabled:
3576
client.init_checker()
3577
1207
3578
tcp_server.enable()
1208
3579
tcp_server.server_activate()
1209
3580
1210
3581
# Find out what port we got
1211
service.port = tcp_server.socket.getsockname()[1]
3582
if zeroconf:
3583
service.port = tcp_server.socket.getsockname()[1]
1212
3584
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
1214
" flowinfo %d, scope_id %d"
1215
% tcp_server.socket.getsockname())
3585
logger.info("Now listening on address %r, port %d,"
3586
" flowinfo %d, scope_id %d",
3587
*tcp_server.socket.getsockname())
1216
3588
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
1218
% tcp_server.socket.getsockname())
1219
1220
#service.interface = tcp_server.socket.getsockname()[3]
1221
3589
logger.info("Now listening on address %r, port %d",
3590
*tcp_server.socket.getsockname())
3591
3592
# service.interface = tcp_server.socket.getsockname()[3]
3593
1222
3594
try:
1223
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1225
try:
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
1229
sys.exit(1)
1230
# End of Avahi example code
1231
1232
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1233
lambda *args, **kwargs:
1234
(tcp_server.handle_request
1235
(*args[2:], **kwargs) or True))
1236
1237
logger.debug(u"Starting main loop")
3595
if zeroconf:
3596
# From the Avahi example code
3597
try:
3598
service.activate()
3599
except dbus.exceptions.DBusException as error:
3600
logger.critical("D-Bus Exception", exc_info=error)
3601
cleanup()
3602
sys.exit(1)
3603
# End of Avahi example code
3604
3605
GLib.io_add_watch(
3606
GLib.IOChannel.unix_new(tcp_server.fileno()),
3607
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3608
lambda *args, **kwargs: (tcp_server.handle_request
3609
(*args[2:], **kwargs) or True))
3610
3611
logger.debug("Starting main loop")
1238
3612
main_loop.run()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
3613
except AvahiError as error:
3614
logger.critical("Avahi Error", exc_info=error)
3615
cleanup()
1241
3616
sys.exit(1)
1242
3617
except KeyboardInterrupt:
1243
3618
if debug:
1244
print >> sys.stderr
3619
print("", file=sys.stderr)
1245
3620
logger.debug("Server received KeyboardInterrupt")
1246
3621
logger.debug("Server exiting")
3622
# Must run before the D-Bus bus name gets deregistered
3623
cleanup()
3624
3625
3626
def should_only_run_tests():
3627
parser = argparse.ArgumentParser(add_help=False)
3628
parser.add_argument("--check", action='store_true')
3629
args, unknown_args = parser.parse_known_args()
3630
run_tests = args.check
3631
if run_tests:
3632
# Remove --check argument from sys.argv
3633
sys.argv[1:] = unknown_args
3634
return run_tests
3635
3636
# Add all tests from doctest strings
3637
def load_tests(loader, tests, none):
3638
import doctest
3639
tests.addTests(doctest.DocTestSuite())
3640
return tests
1247
3641
1248
3642
if __name__ == '__main__':
1249
main()
3643
try:
3644
if should_only_run_tests():
3645
# Call using ./mandos --check [--verbose]
3646
unittest.main()
3647
else:
3648
main()
3649
finally:
3650
logging.shutdown()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0