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- Committer: teddy at recompile
- Date: 2020-07-04 08:59:37 UTC
- Revision ID: teddy@recompile.se-20200704085937-r495zb32nfng9lnt
In initramfs-tools boots, only use setsid when available
* initramfs-tools-script: If available, use setsid to start
mandos-to-cryptroot-unlock.
* initramfs-tools-script: If available, use setsid to start
mandos-to-cryptroot-unlock.
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- 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
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
from future_builtins import *
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
38
42
39
import SocketServer as socketserver
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
40
47
import socket
41
48
import argparse
42
49
import datetime
43
50
import errno
44
import gnutls.crypto
45
import gnutls.connection
46
import gnutls.errors
47
import gnutls.library.functions
48
import gnutls.library.constants
49
import gnutls.library.types
50
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
51
55
import sys
52
56
import re
53
57
import os
62
66
import struct
63
67
import fcntl
64
68
import functools
65
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
66
73
import multiprocessing
67
74
import types
68
75
import binascii
69
76
import tempfile
70
77
import itertools
78
import collections
79
import codecs
80
import unittest
81
import random
82
import shlex
71
83
72
84
import dbus
73
85
import dbus.service
74
import gobject
75
import avahi
86
import gi
87
from gi.repository import GLib
76
88
from dbus.mainloop.glib import DBusGMainLoop
77
89
import ctypes
78
90
import ctypes.util
79
91
import xml.dom.minidom
80
92
import inspect
81
import GnuPGInterface
82
83
try:
93
94
if sys.version_info.major == 2:
95
__metaclass__ = type
96
str = unicode
97
98
# Add collections.abc.Callable if it does not exist
99
try:
100
collections.abc.Callable
101
except AttributeError:
102
class abc:
103
Callable = collections.Callable
104
collections.abc = abc
105
del abc
106
107
# Add shlex.quote if it does not exist
108
try:
109
shlex.quote
110
except AttributeError:
111
shlex.quote = re.escape
112
113
# Show warnings by default
114
if not sys.warnoptions:
115
import warnings
116
warnings.simplefilter("default")
117
118
# Try to find the value of SO_BINDTODEVICE:
119
try:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
84
122
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
123
except AttributeError:
86
124
try:
125
# This is where SO_BINDTODEVICE was up to and including Python
126
# 2.6, and also 3.2:
87
127
from IN import SO_BINDTODEVICE
88
128
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.5.3"
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
131
try:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
133
"/dev/stdin"],
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
140
# No value found
141
SO_BINDTODEVICE = None
142
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
145
146
version = "1.8.11"
92
147
stored_state_file = "clients.pickle"
93
148
94
149
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
150
logging.captureWarnings(True) # Show warnings via the logging system
151
syslogger = None
98
152
99
153
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
103
156
except (OSError, AttributeError):
157
104
158
def if_nametoindex(interface):
105
159
"Get an interface index the hard way, i.e. using fcntl()"
106
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
161
with contextlib.closing(socket.socket()) as s:
108
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
165
return interface_index
114
166
115
167
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
172
func.func_globals,
173
func.func_name,
174
func.func_defaults,
175
func.func_closure)
176
else:
177
return types.FunctionType(func.__code__,
178
func.__globals__,
179
func.__name__,
180
func.__defaults__,
181
func.__closure__)
182
183
116
184
def initlogger(debug, level=logging.WARNING):
117
185
"""init logger and add loglevel"""
118
186
187
global syslogger
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
190
address="/dev/log"))
119
191
syslogger.setFormatter(logging.Formatter
120
192
('Mandos [%(process)d]: %(levelname)s:'
121
193
' %(message)s'))
122
194
logger.addHandler(syslogger)
123
195
124
196
if debug:
125
197
console = logging.StreamHandler()
126
198
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
136
208
pass
137
209
138
210
139
class PGPEngine(object):
211
class PGPEngine:
140
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
213
141
214
def __init__(self):
142
self.gnupg = GnuPGInterface.GnuPG()
143
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
148
'--quiet',
149
'--no-use-agent'])
150
216
self.gpg = "gpg"
217
try:
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
221
if name == b"gpg":
222
self.gpg = path
223
break
224
except OSError as e:
225
if e.errno != errno.ENOENT:
226
raise
227
self.gnupgargs = ['--batch',
228
'--homedir', self.tempdir,
229
'--force-mdc',
230
'--quiet']
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
234
151
235
def __enter__(self):
152
236
return self
153
154
def __exit__ (self, exc_type, exc_value, traceback):
237
238
def __exit__(self, exc_type, exc_value, traceback):
155
239
self._cleanup()
156
240
return False
157
241
158
242
def __del__(self):
159
243
self._cleanup()
160
244
161
245
def _cleanup(self):
162
246
if self.tempdir is not None:
163
247
# Delete contents of tempdir
164
248
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
249
topdown=False):
166
250
for filename in files:
167
251
os.remove(os.path.join(root, filename))
168
252
for dirname in dirs:
170
254
# Remove tempdir
171
255
os.rmdir(self.tempdir)
172
256
self.tempdir = None
173
257
174
258
def password_encode(self, password):
175
259
# Passphrase can not be empty and can not contain newlines or
176
260
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
178
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
267
return encoded
268
179
269
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
182
try:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
187
f.write(data)
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
190
proc.wait()
191
except IOError as e:
192
raise PGPError(e)
193
self.gnupg.passphrase = None
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
274
passfile.flush()
275
proc = subprocess.Popen([self.gpg, '--symmetric',
276
'--passphrase-file',
277
passfile.name]
278
+ self.gnupgargs,
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
284
raise PGPError(err)
194
285
return ciphertext
195
286
196
287
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
199
try:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
204
f.write(data)
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
207
proc.wait()
208
except IOError as e:
209
raise PGPError(e)
210
self.gnupg.passphrase = None
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
292
passfile.flush()
293
proc = subprocess.Popen([self.gpg, '--decrypt',
294
'--passphrase-file',
295
passfile.name]
296
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
302
raise PGPError(err)
211
303
return decrypted_plaintext
212
304
213
305
306
# Pretend that we have an Avahi module
307
class avahi:
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
317
318
@staticmethod
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
330
331
214
332
class AvahiError(Exception):
215
333
def __init__(self, value, *args, **kwargs):
216
334
self.value = value
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
335
return super(AvahiError, self).__init__(value, *args,
336
**kwargs)
337
220
338
221
339
class AvahiServiceError(AvahiError):
222
340
pass
223
341
342
224
343
class AvahiGroupError(AvahiError):
225
344
pass
226
345
227
346
228
class AvahiService(object):
347
class AvahiService:
229
348
"""An Avahi (Zeroconf) service.
230
349
231
350
Attributes:
232
351
interface: integer; avahi.IF_UNSPEC or an interface index.
233
352
Used to optionally bind to the specified interface.
234
353
name: string; Example: 'Mandos'
235
354
type: string; Example: '_mandos._tcp'.
236
See <http://www.dns-sd.org/ServiceTypes.html>
355
See <https://www.iana.org/assignments/service-names-port-numbers>
237
356
port: integer; what port to announce
238
357
TXT: list of strings; TXT record for the service
239
358
domain: string; Domain to publish on, default to .local if empty.
245
364
server: D-Bus Server
246
365
bus: dbus.SystemBus()
247
366
"""
248
249
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
servicetype = None, port = None, TXT = None,
251
domain = "", host = "", max_renames = 32768,
252
protocol = avahi.PROTO_UNSPEC, bus = None):
367
368
def __init__(self,
369
interface=avahi.IF_UNSPEC,
370
name=None,
371
servicetype=None,
372
port=None,
373
TXT=None,
374
domain="",
375
host="",
376
max_renames=32768,
377
protocol=avahi.PROTO_UNSPEC,
378
bus=None):
253
379
self.interface = interface
254
380
self.name = name
255
381
self.type = servicetype
264
390
self.server = None
265
391
self.bus = bus
266
392
self.entry_group_state_changed_match = None
267
268
def rename(self):
393
394
def rename(self, remove=True):
269
395
"""Derived from the Avahi example code"""
270
396
if self.rename_count >= self.max_renames:
271
397
logger.critical("No suitable Zeroconf service name found"
272
398
" after %i retries, exiting.",
273
399
self.rename_count)
274
400
raise AvahiServiceError("Too many renames")
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
401
self.name = str(
402
self.server.GetAlternativeServiceName(self.name))
403
self.rename_count += 1
277
404
logger.info("Changing Zeroconf service name to %r ...",
278
405
self.name)
279
self.remove()
406
if remove:
407
self.remove()
280
408
try:
281
409
self.add()
282
410
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
284
self.cleanup()
285
os._exit(1)
286
self.rename_count += 1
287
411
if (error.get_dbus_name()
412
== "org.freedesktop.Avahi.CollisionError"):
413
logger.info("Local Zeroconf service name collision.")
414
return self.rename(remove=False)
415
else:
416
logger.critical("D-Bus Exception", exc_info=error)
417
self.cleanup()
418
os._exit(1)
419
288
420
def remove(self):
289
421
"""Derived from the Avahi example code"""
290
422
if self.entry_group_state_changed_match is not None:
292
424
self.entry_group_state_changed_match = None
293
425
if self.group is not None:
294
426
self.group.Reset()
295
427
296
428
def add(self):
297
429
"""Derived from the Avahi example code"""
298
430
self.remove()
315
447
dbus.UInt16(self.port),
316
448
avahi.string_array_to_txt_array(self.TXT))
317
449
self.group.Commit()
318
450
319
451
def entry_group_state_changed(self, state, error):
320
452
"""Derived from the Avahi example code"""
321
453
logger.debug("Avahi entry group state change: %i", state)
322
454
323
455
if state == avahi.ENTRY_GROUP_ESTABLISHED:
324
456
logger.debug("Zeroconf service established.")
325
457
elif state == avahi.ENTRY_GROUP_COLLISION:
327
459
self.rename()
328
460
elif state == avahi.ENTRY_GROUP_FAILURE:
329
461
logger.critical("Avahi: Error in group state changed %s",
330
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
462
str(error))
463
raise AvahiGroupError("State changed: {!s}".format(error))
464
334
465
def cleanup(self):
335
466
"""Derived from the Avahi example code"""
336
467
if self.group is not None:
341
472
pass
342
473
self.group = None
343
474
self.remove()
344
475
345
476
def server_state_changed(self, state, error=None):
346
477
"""Derived from the Avahi example code"""
347
478
logger.debug("Avahi server state change: %i", state)
348
bad_states = { avahi.SERVER_INVALID:
349
"Zeroconf server invalid",
350
avahi.SERVER_REGISTERING: None,
351
avahi.SERVER_COLLISION:
352
"Zeroconf server name collision",
353
avahi.SERVER_FAILURE:
354
"Zeroconf server failure" }
479
bad_states = {
480
avahi.SERVER_INVALID: "Zeroconf server invalid",
481
avahi.SERVER_REGISTERING: None,
482
avahi.SERVER_COLLISION: "Zeroconf server name collision",
483
avahi.SERVER_FAILURE: "Zeroconf server failure",
484
}
355
485
if state in bad_states:
356
486
if bad_states[state] is not None:
357
487
if error is None:
360
490
logger.error(bad_states[state] + ": %r", error)
361
491
self.cleanup()
362
492
elif state == avahi.SERVER_RUNNING:
363
self.add()
493
try:
494
self.add()
495
except dbus.exceptions.DBusException as error:
496
if (error.get_dbus_name()
497
== "org.freedesktop.Avahi.CollisionError"):
498
logger.info("Local Zeroconf service name"
499
" collision.")
500
return self.rename(remove=False)
501
else:
502
logger.critical("D-Bus Exception", exc_info=error)
503
self.cleanup()
504
os._exit(1)
364
505
else:
365
506
if error is None:
366
507
logger.debug("Unknown state: %r", state)
367
508
else:
368
509
logger.debug("Unknown state: %r: %r", state, error)
369
510
370
511
def activate(self):
371
512
"""Derived from the Avahi example code"""
372
513
if self.server is None:
376
517
follow_name_owner_changes=True),
377
518
avahi.DBUS_INTERFACE_SERVER)
378
519
self.server.connect_to_signal("StateChanged",
379
self.server_state_changed)
520
self.server_state_changed)
380
521
self.server_state_changed(self.server.GetState())
381
522
382
523
383
524
class AvahiServiceToSyslog(AvahiService):
384
def rename(self):
525
def rename(self, *args, **kwargs):
385
526
"""Add the new name to the syslog messages"""
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
390
.format(self.name)))
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
530
.format(self.name)))
391
531
return ret
392
532
393
533
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
399
400
401
class Client(object):
534
# Pretend that we have a GnuTLS module
535
class gnutls:
536
"""This isn't so much a class as it is a module-like namespace."""
537
538
library = ctypes.util.find_library("gnutls")
539
if library is None:
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
542
del library
543
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
546
547
# Constants
548
E_SUCCESS = 0
549
E_INTERRUPTED = -52
550
E_AGAIN = -28
551
CRT_OPENPGP = 2
552
CRT_RAWPK = 3
553
CLIENT = 2
554
SHUT_RDWR = 0
555
CRD_CERTIFICATE = 1
556
E_NO_CERTIFICATE_FOUND = -49
557
X509_FMT_DER = 0
558
NO_TICKETS = 1<<10
559
ENABLE_RAWPK = 1<<18
560
CTYPE_PEERS = 3
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
563
564
# Types
565
class session_int(ctypes.Structure):
566
_fields_ = []
567
session_t = ctypes.POINTER(session_int)
568
569
class certificate_credentials_st(ctypes.Structure):
570
_fields_ = []
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
574
575
class datum_t(ctypes.Structure):
576
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
577
('size', ctypes.c_uint)]
578
579
class openpgp_crt_int(ctypes.Structure):
580
_fields_ = []
581
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
587
588
# Exceptions
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
593
# gnutls.strerror()
594
self.code = code
595
if message is None and code is not None:
596
message = gnutls.strerror(code)
597
return super(gnutls.Error, self).__init__(
598
message, *args)
599
600
class CertificateSecurityError(Error):
601
pass
602
603
# Classes
604
class Credentials:
605
def __init__(self):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
610
611
def __del__(self):
612
gnutls.certificate_free_credentials(self._c_object)
613
614
class ClientSession:
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
620
if gnutls.has_rawpk:
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
623
del gnutls_flags
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
627
True)
628
self.socket = socket
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
633
ctypes.c_void_p))
634
self.credentials = credentials
635
636
def __del__(self):
637
gnutls.deinit(self._c_object)
638
639
def handshake(self):
640
return gnutls.handshake(self._c_object)
641
642
def send(self, data):
643
data = bytes(data)
644
data_len = len(data)
645
while data_len > 0:
646
data_len -= gnutls.record_send(self._c_object,
647
data[-data_len:],
648
data_len)
649
650
def bye(self):
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
652
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
657
if result >= 0:
658
return result
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
662
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
666
while result < 0:
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
670
return result
671
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
674
675
# Functions
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
680
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
684
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
688
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
691
ctypes.c_size_t]
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
694
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
700
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
706
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
710
ctypes.c_int]
711
handshake_set_private_extensions.restype = None
712
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
715
ctypes.c_void_p]
716
credentials_set.restype = _error_code
717
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
721
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
725
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
730
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
734
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
738
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
742
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
747
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
751
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
756
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
760
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
765
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
768
769
if has_rawpk:
770
# Types
771
class pubkey_st(ctypes.Structure):
772
_fields = []
773
pubkey_t = ctypes.POINTER(pubkey_st)
774
775
x509_crt_fmt_t = ctypes.c_int
776
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
781
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
784
x509_crt_fmt_t]
785
pubkey_import.restype = _error_code
786
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
792
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
796
else:
797
# All the function declarations below are from gnutls/openpgp.h
798
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
802
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
806
openpgp_crt_fmt_t]
807
openpgp_crt_import.restype = _error_code
808
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
813
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
817
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
821
ctypes.c_void_p,
822
ctypes.POINTER(
823
ctypes.c_size_t)]
824
openpgp_crt_get_fingerprint.restype = _error_code
825
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
830
831
# Remove non-public functions
832
del _error_code, _retry_on_error
833
834
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
838
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
841
"""
842
connection.send(func(*args, **kwargs))
843
connection.close()
844
845
846
class Client:
402
847
"""A representation of a client host served by this server.
403
848
404
849
Attributes:
405
850
approved: bool(); 'None' if not yet approved/disapproved
406
851
approval_delay: datetime.timedelta(); Time to wait for approval
407
852
approval_duration: datetime.timedelta(); Duration of one approval
408
checker: subprocess.Popen(); a running checker process used
409
to see if the client lives.
410
'None' if no process is running.
411
checker_callback_tag: a gobject event source tag, or None
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
855
running.
856
checker_callback_tag: a GLib event source tag, or None
412
857
checker_command: string; External command which is run to check
413
858
if client lives. %() expansions are done at
414
859
runtime with vars(self) as dict, so that for
415
860
instance %(name)s can be used in the command.
416
checker_initiator_tag: a gobject event source tag, or None
861
checker_initiator_tag: a GLib event source tag, or None
417
862
created: datetime.datetime(); (UTC) object creation
418
863
client_structure: Object describing what attributes a client has
419
864
and is used for storing the client at exit
420
865
current_checker_command: string; current running checker_command
421
disable_initiator_tag: a gobject event source tag, or None
866
disable_initiator_tag: a GLib event source tag, or None
422
867
enabled: bool()
423
868
fingerprint: string (40 or 32 hexadecimal digits); used to
424
uniquely identify the client
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
425
872
host: string; available for use by the checker command
426
873
interval: datetime.timedelta(); How often to start a new checker
427
874
last_approval_request: datetime.datetime(); (UTC) or None
429
876
last_checker_status: integer between 0 and 255 reflecting exit
430
877
status of last checker. -1 reflects crashed
431
878
checker, -2 means no checker completed yet.
879
last_checker_signal: The signal which killed the last checker, if
880
last_checker_status is -1
432
881
last_enabled: datetime.datetime(); (UTC) or None
433
882
name: string; from the config file, used in log messages and
434
883
D-Bus identifiers
439
888
runtime_expansions: Allowed attributes for runtime expansion.
440
889
expires: datetime.datetime(); time (UTC) when a client will be
441
890
disabled, or None
891
server_settings: The server_settings dict from main()
442
892
"""
443
893
444
894
runtime_expansions = ("approval_delay", "approval_duration",
445
"created", "enabled", "expires",
895
"created", "enabled", "expires", "key_id",
446
896
"fingerprint", "host", "interval",
447
897
"last_approval_request", "last_checked_ok",
448
898
"last_enabled", "name", "timeout")
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
451
"interval": "2m",
452
"checker": "fping -q -- %%(host)s",
453
"host": "",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
457
"enabled": "True",
458
}
459
460
def timeout_milliseconds(self):
461
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
463
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
467
468
def interval_milliseconds(self):
469
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
471
472
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
474
899
client_defaults = {
900
"timeout": "PT5M",
901
"extended_timeout": "PT15M",
902
"interval": "PT2M",
903
"checker": "fping -q -- %%(host)s",
904
"host": "",
905
"approval_delay": "PT0S",
906
"approval_duration": "PT1S",
907
"approved_by_default": "True",
908
"enabled": "True",
909
}
910
475
911
@staticmethod
476
912
def config_parser(config):
477
913
"""Construct a new dict of client settings of this form:
484
920
for client_name in config.sections():
485
921
section = dict(config.items(client_name))
486
922
client = settings[client_name] = {}
487
923
488
924
client["host"] = section["host"]
489
925
# Reformat values from string types to Python types
490
926
client["approved_by_default"] = config.getboolean(
491
927
client_name, "approved_by_default")
492
928
client["enabled"] = config.getboolean(client_name,
493
929
"enabled")
494
930
931
# Uppercase and remove spaces from key_id and fingerprint
932
# for later comparison purposes with return value from the
933
# key_id() and fingerprint() functions
934
client["key_id"] = (section.get("key_id", "").upper()
935
.replace(" ", ""))
495
936
client["fingerprint"] = (section["fingerprint"].upper()
496
937
.replace(" ", ""))
497
938
if "secret" in section:
498
client["secret"] = section["secret"].decode("base64")
939
client["secret"] = codecs.decode(section["secret"]
940
.encode("utf-8"),
941
"base64")
499
942
elif "secfile" in section:
500
943
with open(os.path.expanduser(os.path.expandvars
501
944
(section["secfile"])),
502
945
"rb") as secfile:
503
946
client["secret"] = secfile.read()
504
947
else:
505
raise TypeError("No secret or secfile for section {0}"
948
raise TypeError("No secret or secfile for section {}"
506
949
.format(section))
507
950
client["timeout"] = string_to_delta(section["timeout"])
508
951
client["extended_timeout"] = string_to_delta(
516
959
client["last_approval_request"] = None
517
960
client["last_checked_ok"] = None
518
961
client["last_checker_status"] = -2
519
962
520
963
return settings
521
522
def __init__(self, settings, name = None):
964
965
def __init__(self, settings, name=None, server_settings=None):
523
966
self.name = name
967
if server_settings is None:
968
server_settings = {}
969
self.server_settings = server_settings
524
970
# adding all client settings
525
for setting, value in settings.iteritems():
971
for setting, value in settings.items():
526
972
setattr(self, setting, value)
527
973
528
974
if self.enabled:
529
975
if not hasattr(self, "last_enabled"):
530
976
self.last_enabled = datetime.datetime.utcnow()
534
980
else:
535
981
self.last_enabled = None
536
982
self.expires = None
537
983
538
984
logger.debug("Creating client %r", self.name)
539
# Uppercase and remove spaces from fingerprint for later
540
# comparison purposes with return value from the fingerprint()
541
# function
985
logger.debug(" Key ID: %s", self.key_id)
542
986
logger.debug(" Fingerprint: %s", self.fingerprint)
543
987
self.created = settings.get("created",
544
988
datetime.datetime.utcnow())
545
989
546
990
# attributes specific for this server instance
547
991
self.checker = None
548
992
self.checker_initiator_tag = None
551
995
self.current_checker_command = None
552
996
self.approved = None
553
997
self.approvals_pending = 0
554
self.changedstate = (multiprocessing_manager
555
.Condition(multiprocessing_manager
556
.Lock()))
557
self.client_structure = [attr for attr in
558
self.__dict__.iterkeys()
998
self.changedstate = multiprocessing_manager.Condition(
999
multiprocessing_manager.Lock())
1000
self.client_structure = [attr
1001
for attr in self.__dict__.keys()
559
1002
if not attr.startswith("_")]
560
1003
self.client_structure.append("client_structure")
561
562
for name, t in inspect.getmembers(type(self),
563
lambda obj:
564
isinstance(obj,
565
property)):
1004
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
566
1007
if not name.startswith("_"):
567
1008
self.client_structure.append(name)
568
1009
569
1010
# Send notice to process children that client state has changed
570
1011
def send_changedstate(self):
571
1012
with self.changedstate:
572
1013
self.changedstate.notify_all()
573
1014
574
1015
def enable(self):
575
1016
"""Start this client's checker and timeout hooks"""
576
1017
if getattr(self, "enabled", False):
581
1022
self.last_enabled = datetime.datetime.utcnow()
582
1023
self.init_checker()
583
1024
self.send_changedstate()
584
1025
585
1026
def disable(self, quiet=True):
586
1027
"""Disable this client."""
587
1028
if not getattr(self, "enabled", False):
589
1030
if not quiet:
590
1031
logger.info("Disabling client %s", self.name)
591
1032
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
1033
GLib.source_remove(self.disable_initiator_tag)
593
1034
self.disable_initiator_tag = None
594
1035
self.expires = None
595
1036
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
1037
GLib.source_remove(self.checker_initiator_tag)
597
1038
self.checker_initiator_tag = None
598
1039
self.stop_checker()
599
1040
self.enabled = False
600
1041
if not quiet:
601
1042
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
1043
# Do not run this again if called by a GLib.timeout_add
603
1044
return False
604
1045
605
1046
def __del__(self):
606
1047
self.disable()
607
1048
608
1049
def init_checker(self):
609
1050
# Schedule a new checker to be started an 'interval' from now,
610
1051
# and every interval from then on.
611
1052
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
615
self.start_checker))
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
1056
+ 1)),
1057
self.start_checker)
616
1058
# Schedule a disable() when 'timeout' has passed
617
1059
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
621
self.disable))
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
622
1063
# Also start a new checker *right now*.
623
1064
self.start_checker()
624
625
def checker_callback(self, pid, condition, command):
1065
1066
def checker_callback(self, source, condition, connection,
1067
command):
626
1068
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1071
connection.close()
1072
if self.checker is not None:
1073
self.checker.join()
627
1074
self.checker_callback_tag = None
628
1075
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1076
1077
if returncode >= 0:
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
631
1080
if self.last_checker_status == 0:
632
1081
logger.info("Checker for %(name)s succeeded",
633
1082
vars(self))
634
1083
self.checked_ok()
635
1084
else:
636
logger.info("Checker for %(name)s failed",
637
vars(self))
1085
logger.info("Checker for %(name)s failed", vars(self))
638
1086
else:
639
1087
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
640
1089
logger.warning("Checker for %(name)s crashed?",
641
1090
vars(self))
642
1091
return False
1092
643
1093
def checked_ok(self):
644
1094
"""Assert that the client has been seen, alive and well."""
645
1095
self.last_checked_ok = datetime.datetime.utcnow()
646
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
647
1098
self.bump_timeout()
648
1099
649
1100
def bump_timeout(self, timeout=None):
650
1101
"""Bump up the timeout for this client."""
651
1102
if timeout is None:
652
1103
timeout = self.timeout
653
1104
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1105
GLib.source_remove(self.disable_initiator_tag)
655
1106
self.disable_initiator_tag = None
656
1107
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
660
1110
self.expires = datetime.datetime.utcnow() + timeout
661
1111
662
1112
def need_approval(self):
663
1113
self.last_approval_request = datetime.datetime.utcnow()
664
1114
665
1115
def start_checker(self):
666
1116
"""Start a new checker subprocess if one is not running.
667
1117
668
1118
If a checker already exists, leave it running and do
669
1119
nothing."""
670
1120
# The reason for not killing a running checker is that if we
675
1125
# checkers alone, the checker would have to take more time
676
1126
# than 'timeout' for the client to be disabled, which is as it
677
1127
# should be.
678
679
# If a checker exists, make sure it is not a zombie
680
try:
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
685
raise error
686
else:
687
if pid:
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
1128
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
1131
self.checker.join()
1132
self.checker = None
692
1133
# Start a new checker if needed
693
1134
if self.checker is None:
694
1135
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
697
for attr in
698
self.runtime_expansions)
1136
escaped_attrs = {
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
699
1139
try:
700
1140
command = self.checker_command % escaped_attrs
701
1141
except TypeError as error:
702
1142
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1143
self.checker_command,
1144
exc_info=error)
1145
return True # Try again later
705
1146
self.current_checker_command = command
706
try:
707
logger.info("Starting checker %r for %s",
708
command, self.name)
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
714
close_fds=True,
715
shell=True, cwd="/")
716
except OSError as error:
717
logger.error("Failed to start subprocess",
718
exc_info=error)
719
self.checker_callback_tag = (gobject.child_watch_add
720
(self.checker.pid,
721
self.checker_callback,
722
data=command))
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
726
if pid:
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
1147
logger.info("Starting checker %r for %s", command,
1148
self.name)
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1155
# created wnull.
1156
popen_args = {"close_fds": True,
1157
"shell": True,
1158
"cwd": "/"}
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1162
"stderr": wnull})
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1165
target=call_pipe,
1166
args=(pipe[1], subprocess.call, command),
1167
kwargs=popen_args)
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
730
1174
return True
731
1175
732
1176
def stop_checker(self):
733
1177
"""Force the checker process, if any, to stop."""
734
1178
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1179
GLib.source_remove(self.checker_callback_tag)
736
1180
self.checker_callback_tag = None
737
1181
if getattr(self, "checker", None) is None:
738
1182
return
739
1183
logger.debug("Stopping checker for %(name)s", vars(self))
740
try:
741
self.checker.terminate()
742
#time.sleep(0.5)
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
747
raise
1184
self.checker.terminate()
748
1185
self.checker = None
749
1186
750
1187
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1188
def dbus_service_property(dbus_interface,
1189
signature="v",
1190
access="readwrite",
1191
byte_arrays=False):
753
1192
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1193
become properties on the D-Bus.
755
1194
756
1195
The decorated method will be called with no arguments by "Get"
757
1196
and with one argument by "Set".
758
1197
759
1198
The parameters, where they are supported, are the same as
760
1199
dbus.service.method, except there is only "signature", since the
761
1200
type from Get() and the type sent to Set() is the same.
764
1203
# "Set" method, so we fail early here:
765
1204
if byte_arrays and signature != "ay":
766
1205
raise ValueError("Byte arrays not supported for non-'ay'"
767
" signature {0!r}".format(signature))
1206
" signature {!r}".format(signature))
1207
768
1208
def decorator(func):
769
1209
func._dbus_is_property = True
770
1210
func._dbus_interface = dbus_interface
773
1213
func._dbus_name = func.__name__
774
1214
if func._dbus_name.endswith("_dbus_property"):
775
1215
func._dbus_name = func._dbus_name[:-14]
776
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1216
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
777
1217
return func
1218
778
1219
return decorator
779
1220
780
1221
781
1222
def dbus_interface_annotations(dbus_interface):
782
1223
"""Decorator for marking functions returning interface annotations
783
1224
784
1225
Usage:
785
1226
786
1227
@dbus_interface_annotations("org.example.Interface")
787
1228
def _foo(self): # Function name does not matter
788
1229
return {"org.freedesktop.DBus.Deprecated": "true",
789
1230
"org.freedesktop.DBus.Property.EmitsChangedSignal":
790
1231
"false"}
791
1232
"""
1233
792
1234
def decorator(func):
793
1235
func._dbus_is_interface = True
794
1236
func._dbus_interface = dbus_interface
795
1237
func._dbus_name = dbus_interface
796
1238
return func
1239
797
1240
return decorator
798
1241
799
1242
800
1243
def dbus_annotations(annotations):
801
1244
"""Decorator to annotate D-Bus methods, signals or properties
802
1245
Usage:
803
1246
1247
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1248
"org.freedesktop.DBus.Property."
1249
"EmitsChangedSignal": "false"})
804
1250
@dbus_service_property("org.example.Interface", signature="b",
805
1251
access="r")
806
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property."
808
"EmitsChangedSignal": "false"})
809
1252
def Property_dbus_property(self):
810
1253
return dbus.Boolean(False)
1254
1255
See also the DBusObjectWithAnnotations class.
811
1256
"""
1257
812
1258
def decorator(func):
813
1259
func._dbus_annotations = annotations
814
1260
return func
1261
815
1262
return decorator
816
1263
817
1264
818
1265
class DBusPropertyException(dbus.exceptions.DBusException):
819
1266
"""A base class for D-Bus property-related exceptions
820
1267
"""
821
def __unicode__(self):
822
return unicode(str(self))
1268
pass
823
1269
824
1270
825
1271
class DBusPropertyAccessException(DBusPropertyException):
834
1280
pass
835
1281
836
1282
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
839
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
1283
class DBusObjectWithAnnotations(dbus.service.Object):
1284
"""A D-Bus object with annotations.
1285
1286
Classes inheriting from this can use the dbus_annotations
1287
decorator to add annotations to methods or signals.
843
1288
"""
844
1289
845
1290
@staticmethod
846
1291
def _is_dbus_thing(thing):
847
1292
"""Returns a function testing if an attribute is a D-Bus thing
848
1293
849
1294
If called like _is_dbus_thing("method") it returns a function
850
1295
suitable for use as predicate to inspect.getmembers().
851
1296
"""
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
853
1298
False)
854
1299
855
1300
def _get_all_dbus_things(self, thing):
856
1301
"""Returns a generator of (name, attribute) pairs
857
1302
"""
858
return ((getattr(athing.__get__(self), "_dbus_name",
859
name),
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1304
athing.__get__(self))
861
1305
for cls in self.__class__.__mro__
862
1306
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
865
1307
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1308
1309
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1310
out_signature="s",
1311
path_keyword='object_path',
1312
connection_keyword='connection')
1313
def Introspect(self, object_path, connection):
1314
"""Overloading of standard D-Bus method.
1315
1316
Inserts annotation tags on methods and signals.
1317
"""
1318
xmlstring = dbus.service.Object.Introspect(self, object_path,
1319
connection)
1320
try:
1321
document = xml.dom.minidom.parseString(xmlstring)
1322
1323
for if_tag in document.getElementsByTagName("interface"):
1324
# Add annotation tags
1325
for typ in ("method", "signal"):
1326
for tag in if_tag.getElementsByTagName(typ):
1327
annots = dict()
1328
for name, prop in (self.
1329
_get_all_dbus_things(typ)):
1330
if (name == tag.getAttribute("name")
1331
and prop._dbus_interface
1332
== if_tag.getAttribute("name")):
1333
annots.update(getattr(
1334
prop, "_dbus_annotations", {}))
1335
for name, value in annots.items():
1336
ann_tag = document.createElement(
1337
"annotation")
1338
ann_tag.setAttribute("name", name)
1339
ann_tag.setAttribute("value", value)
1340
tag.appendChild(ann_tag)
1341
# Add interface annotation tags
1342
for annotation, value in dict(
1343
itertools.chain.from_iterable(
1344
annotations().items()
1345
for name, annotations
1346
in self._get_all_dbus_things("interface")
1347
if name == if_tag.getAttribute("name")
1348
)).items():
1349
ann_tag = document.createElement("annotation")
1350
ann_tag.setAttribute("name", annotation)
1351
ann_tag.setAttribute("value", value)
1352
if_tag.appendChild(ann_tag)
1353
# Fix argument name for the Introspect method itself
1354
if (if_tag.getAttribute("name")
1355
== dbus.INTROSPECTABLE_IFACE):
1356
for cn in if_tag.getElementsByTagName("method"):
1357
if cn.getAttribute("name") == "Introspect":
1358
for arg in cn.getElementsByTagName("arg"):
1359
if (arg.getAttribute("direction")
1360
== "out"):
1361
arg.setAttribute("name",
1362
"xml_data")
1363
xmlstring = document.toxml("utf-8")
1364
document.unlink()
1365
except (AttributeError, xml.dom.DOMException,
1366
xml.parsers.expat.ExpatError) as error:
1367
logger.error("Failed to override Introspection method",
1368
exc_info=error)
1369
return xmlstring
1370
1371
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1373
"""A D-Bus object with properties.
1374
1375
Classes inheriting from this can use the dbus_service_property
1376
decorator to expose methods as D-Bus properties. It exposes the
1377
standard Get(), Set(), and GetAll() methods on the D-Bus.
1378
"""
1379
866
1380
def _get_dbus_property(self, interface_name, property_name):
867
1381
"""Returns a bound method if one exists which is a D-Bus
868
1382
property with the specified name and interface.
869
1383
"""
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
872
(cls,
873
self._is_dbus_thing("property"))):
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
874
1387
if (value._dbus_name == property_name
875
1388
and value._dbus_interface == interface_name):
876
1389
return value.__get__(self)
877
1390
878
1391
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
881
+ property_name)
882
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1392
raise DBusPropertyNotFound("{}:{}.{}".format(
1393
self.dbus_object_path, interface_name, property_name))
1394
1395
@classmethod
1396
def _get_all_interface_names(cls):
1397
"""Get a sequence of all interfaces supported by an object"""
1398
return (name for name in set(getattr(getattr(x, attr),
1399
"_dbus_interface", None)
1400
for x in (inspect.getmro(cls))
1401
for attr in dir(x))
1402
if name is not None)
1403
1404
@dbus.service.method(dbus.PROPERTIES_IFACE,
1405
in_signature="ss",
884
1406
out_signature="v")
885
1407
def Get(self, interface_name, property_name):
886
1408
"""Standard D-Bus property Get() method, see D-Bus standard.
892
1414
if not hasattr(value, "variant_level"):
893
1415
return value
894
1416
return type(value)(value, variant_level=value.variant_level+1)
895
1417
896
1418
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
897
1419
def Set(self, interface_name, property_name, value):
898
1420
"""Standard D-Bus property Set() method, see D-Bus standard.
904
1426
# The byte_arrays option is not supported yet on
905
1427
# signatures other than "ay".
906
1428
if prop._dbus_signature != "ay":
907
raise ValueError
908
value = dbus.ByteArray(b''.join(chr(byte)
909
for byte in value))
1429
raise ValueError("Byte arrays not supported for non-"
1430
"'ay' signature {!r}"
1431
.format(prop._dbus_signature))
1432
value = dbus.ByteArray(bytes(value))
910
1433
prop(value)
911
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1434
1435
@dbus.service.method(dbus.PROPERTIES_IFACE,
1436
in_signature="s",
913
1437
out_signature="a{sv}")
914
1438
def GetAll(self, interface_name):
915
1439
"""Standard D-Bus property GetAll() method, see D-Bus
916
1440
standard.
917
1441
918
1442
Note: Will not include properties with access="write".
919
1443
"""
920
1444
properties = {}
930
1454
if not hasattr(value, "variant_level"):
931
1455
properties[name] = value
932
1456
continue
933
properties[name] = type(value)(value, variant_level=
934
value.variant_level+1)
1457
properties[name] = type(value)(
1458
value, variant_level=value.variant_level + 1)
935
1459
return dbus.Dictionary(properties, signature="sv")
936
1460
1461
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1462
def PropertiesChanged(self, interface_name, changed_properties,
1463
invalidated_properties):
1464
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1465
standard.
1466
"""
1467
pass
1468
937
1469
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
938
1470
out_signature="s",
939
1471
path_keyword='object_path',
940
1472
connection_keyword='connection')
941
1473
def Introspect(self, object_path, connection):
942
1474
"""Overloading of standard D-Bus method.
943
1475
944
1476
Inserts property tags and interface annotation tags.
945
1477
"""
946
xmlstring = dbus.service.Object.Introspect(self, object_path,
947
connection)
1478
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1479
object_path,
1480
connection)
948
1481
try:
949
1482
document = xml.dom.minidom.parseString(xmlstring)
1483
950
1484
def make_tag(document, name, prop):
951
1485
e = document.createElement("property")
952
1486
e.setAttribute("name", name)
953
1487
e.setAttribute("type", prop._dbus_signature)
954
1488
e.setAttribute("access", prop._dbus_access)
955
1489
return e
1490
956
1491
for if_tag in document.getElementsByTagName("interface"):
957
1492
# Add property tags
958
1493
for tag in (make_tag(document, name, prop)
961
1496
if prop._dbus_interface
962
1497
== if_tag.getAttribute("name")):
963
1498
if_tag.appendChild(tag)
964
# Add annotation tags
965
for typ in ("method", "signal", "property"):
966
for tag in if_tag.getElementsByTagName(typ):
967
annots = dict()
968
for name, prop in (self.
969
_get_all_dbus_things(typ)):
970
if (name == tag.getAttribute("name")
971
and prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
annots.update(getattr
974
(prop,
975
"_dbus_annotations",
976
{}))
977
for name, value in annots.iteritems():
978
ann_tag = document.createElement(
979
"annotation")
980
ann_tag.setAttribute("name", name)
981
ann_tag.setAttribute("value", value)
982
tag.appendChild(ann_tag)
983
# Add interface annotation tags
984
for annotation, value in dict(
985
itertools.chain.from_iterable(
986
annotations().iteritems()
987
for name, annotations in
988
self._get_all_dbus_things("interface")
989
if name == if_tag.getAttribute("name")
990
)).iteritems():
991
ann_tag = document.createElement("annotation")
992
ann_tag.setAttribute("name", annotation)
993
ann_tag.setAttribute("value", value)
994
if_tag.appendChild(ann_tag)
1499
# Add annotation tags for properties
1500
for tag in if_tag.getElementsByTagName("property"):
1501
annots = dict()
1502
for name, prop in self._get_all_dbus_things(
1503
"property"):
1504
if (name == tag.getAttribute("name")
1505
and prop._dbus_interface
1506
== if_tag.getAttribute("name")):
1507
annots.update(getattr(
1508
prop, "_dbus_annotations", {}))
1509
for name, value in annots.items():
1510
ann_tag = document.createElement(
1511
"annotation")
1512
ann_tag.setAttribute("name", name)
1513
ann_tag.setAttribute("value", value)
1514
tag.appendChild(ann_tag)
995
1515
# Add the names to the return values for the
996
1516
# "org.freedesktop.DBus.Properties" methods
997
1517
if (if_tag.getAttribute("name")
1016
1536
return xmlstring
1017
1537
1018
1538
1019
def datetime_to_dbus (dt, variant_level=0):
1539
try:
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1543
1544
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1547
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1552
1553
Note: No signals are sent automatically; they must be sent
1554
manually.
1555
"""
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1561
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1565
pass
1566
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1569
pass
1570
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1572
out_signature="s",
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1577
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1580
"""
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1582
object_path,
1583
connection)
1584
try:
1585
document = xml.dom.minidom.parseString(xmlstring)
1586
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1596
== "out"):
1597
arg.setAttribute(
1598
"name",
1599
"objpath_interfaces"
1600
"_and_properties")
1601
xmlstring = document.toxml("utf-8")
1602
document.unlink()
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1606
exc_info=error)
1607
return xmlstring
1608
1609
1610
def datetime_to_dbus(dt, variant_level=0):
1020
1611
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1021
1612
if dt is None:
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1025
1615
1026
1616
1027
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1029
1619
dbus.service.Object, it will add alternate D-Bus attributes with
1030
1620
interface names according to the "alt_interface_names" mapping.
1031
1621
Usage:
1032
1033
@alternate_dbus_names({"org.example.Interface":
1034
"net.example.AlternateInterface"})
1622
1623
@alternate_dbus_interfaces({"org.example.Interface":
1624
"net.example.AlternateInterface"})
1035
1625
class SampleDBusObject(dbus.service.Object):
1036
1626
@dbus.service.method("org.example.Interface")
1037
1627
def SampleDBusMethod():
1038
1628
pass
1039
1629
1040
1630
The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
1631
reachable via two interfaces: "org.example.Interface" and
1042
1632
"net.example.AlternateInterface", the latter of which will have
1043
1633
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
1634
"true", unless "deprecate" is passed with a False value.
1045
1635
1046
1636
This works for methods and signals, and also for D-Bus properties
1047
1637
(from DBusObjectWithProperties) and interfaces (from the
1048
1638
dbus_interface_annotations decorator).
1049
1639
"""
1640
1050
1641
def wrapper(cls):
1051
1642
for orig_interface_name, alt_interface_name in (
1052
alt_interface_names.iteritems()):
1643
alt_interface_names.items()):
1053
1644
attr = {}
1054
1645
interface_names = set()
1055
1646
# Go though all attributes of the class
1057
1648
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
1649
# with the wrong interface name
1059
1650
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1651
or not attribute._dbus_interface.startswith(
1652
orig_interface_name)):
1062
1653
continue
1063
1654
# Create an alternate D-Bus interface name based on
1064
1655
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1656
alt_interface = attribute._dbus_interface.replace(
1657
orig_interface_name, alt_interface_name)
1068
1658
interface_names.add(alt_interface)
1069
1659
# Is this a D-Bus signal?
1070
1660
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1072
# black magic
1073
nonmethod_func = (dict(
1661
# Extract the original non-method undecorated
1662
# function by black magic
1663
if sys.version_info.major == 2:
1664
nonmethod_func = (dict(
1074
1665
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1076
.cell_contents)
1666
attribute.__closure__))
1667
["func"].cell_contents)
1668
else:
1669
nonmethod_func = (dict(
1670
zip(attribute.__code__.co_freevars,
1671
attribute.__closure__))
1672
["func"].cell_contents)
1077
1673
# Create a new, but exactly alike, function
1078
1674
# object, and decorate it to be a new D-Bus signal
1079
1675
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1081
(alt_interface,
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1676
new_function = copy_function(nonmethod_func)
1677
new_function = (dbus.service.signal(
1678
alt_interface,
1679
attribute._dbus_signature)(new_function))
1089
1680
# Copy annotations, if any
1090
1681
try:
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1682
new_function._dbus_annotations = dict(
1683
attribute._dbus_annotations)
1093
1684
except AttributeError:
1094
1685
pass
1686
1095
1687
# Define a creator of a function to call both the
1096
1688
# original and alternate functions, so both the
1097
1689
# original and alternate signals gets sent when
1100
1692
"""This function is a scope container to pass
1101
1693
func1 and func2 to the "call_both" function
1102
1694
outside of its arguments"""
1695
1696
@functools.wraps(func2)
1103
1697
def call_both(*args, **kwargs):
1104
1698
"""This function will emit two D-Bus
1105
1699
signals by calling func1 and func2"""
1106
1700
func1(*args, **kwargs)
1107
1701
func2(*args, **kwargs)
1702
# Make wrapper function look like a D-Bus
1703
# signal
1704
for name, attr in inspect.getmembers(func2):
1705
if name.startswith("_dbus_"):
1706
setattr(call_both, name, attr)
1707
1108
1708
return call_both
1109
1709
# Create the "call_both" function and add it to
1110
1710
# the class
1115
1715
# object. Decorate it to be a new D-Bus method
1116
1716
# with the alternate D-Bus interface name. Add it
1117
1717
# to the class.
1118
attr[attrname] = (dbus.service.method
1119
(alt_interface,
1120
attribute._dbus_in_signature,
1121
attribute._dbus_out_signature)
1122
(types.FunctionType
1123
(attribute.func_code,
1124
attribute.func_globals,
1125
attribute.func_name,
1126
attribute.func_defaults,
1127
attribute.func_closure)))
1718
attr[attrname] = (
1719
dbus.service.method(
1720
alt_interface,
1721
attribute._dbus_in_signature,
1722
attribute._dbus_out_signature)
1723
(copy_function(attribute)))
1128
1724
# Copy annotations, if any
1129
1725
try:
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1132
1728
except AttributeError:
1133
1729
pass
1134
1730
# Is this a D-Bus property?
1137
1733
# object, and decorate it to be a new D-Bus
1138
1734
# property with the alternate D-Bus interface
1139
1735
# name. Add it to the class.
1140
attr[attrname] = (dbus_service_property
1141
(alt_interface,
1142
attribute._dbus_signature,
1143
attribute._dbus_access,
1144
attribute
1145
._dbus_get_args_options
1146
["byte_arrays"])
1147
(types.FunctionType
1148
(attribute.func_code,
1149
attribute.func_globals,
1150
attribute.func_name,
1151
attribute.func_defaults,
1152
attribute.func_closure)))
1736
attr[attrname] = (dbus_service_property(
1737
alt_interface, attribute._dbus_signature,
1738
attribute._dbus_access,
1739
attribute._dbus_get_args_options
1740
["byte_arrays"])
1741
(copy_function(attribute)))
1153
1742
# Copy annotations, if any
1154
1743
try:
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1744
attr[attrname]._dbus_annotations = dict(
1745
attribute._dbus_annotations)
1157
1746
except AttributeError:
1158
1747
pass
1159
1748
# Is this a D-Bus interface?
1162
1751
# object. Decorate it to be a new D-Bus interface
1163
1752
# with the alternate D-Bus interface name. Add it
1164
1753
# to the class.
1165
attr[attrname] = (dbus_interface_annotations
1166
(alt_interface)
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1754
attr[attrname] = (
1755
dbus_interface_annotations(alt_interface)
1756
(copy_function(attribute)))
1173
1757
if deprecate:
1174
1758
# Deprecate all alternate interfaces
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1759
iname = "_AlternateDBusNames_interface_annotation{}"
1176
1760
for interface_name in interface_names:
1761
1177
1762
@dbus_interface_annotations(interface_name)
1178
1763
def func(self):
1179
return { "org.freedesktop.DBus.Deprecated":
1180
"true" }
1764
return {"org.freedesktop.DBus.Deprecated":
1765
"true"}
1181
1766
# Find an unused name
1182
1767
for aname in (iname.format(i)
1183
1768
for i in itertools.count()):
1187
1772
if interface_names:
1188
1773
# Replace the class with a new subclass of it with
1189
1774
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1191
(cls,), attr)
1775
if sys.version_info.major == 2:
1776
cls = type(b"{}Alternate".format(cls.__name__),
1777
(cls, ), attr)
1778
else:
1779
cls = type("{}Alternate".format(cls.__name__),
1780
(cls, ), attr)
1192
1781
return cls
1782
1193
1783
return wrapper
1194
1784
1195
1785
1196
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
1787
"se.bsnet.fukt.Mandos"})
1198
1788
class ClientDBus(Client, DBusObjectWithProperties):
1199
1789
"""A Client class using D-Bus
1200
1790
1201
1791
Attributes:
1202
1792
dbus_object_path: dbus.ObjectPath
1203
1793
bus: dbus.SystemBus()
1204
1794
"""
1205
1795
1206
1796
runtime_expansions = (Client.runtime_expansions
1207
+ ("dbus_object_path",))
1208
1797
+ ("dbus_object_path", ))
1798
1799
_interface = "se.recompile.Mandos.Client"
1800
1209
1801
# dbus.service.Object doesn't use super(), so we can't either.
1210
1211
def __init__(self, bus = None, *args, **kwargs):
1802
1803
def __init__(self, bus=None, *args, **kwargs):
1212
1804
self.bus = bus
1213
1805
Client.__init__(self, *args, **kwargs)
1214
1806
# Only now, when this client is initialized, can it show up on
1215
1807
# the D-Bus
1216
client_object_name = unicode(self.name).translate(
1808
client_object_name = str(self.name).translate(
1217
1809
{ord("."): ord("_"),
1218
1810
ord("-"): ord("_")})
1219
self.dbus_object_path = (dbus.ObjectPath
1220
("/clients/" + client_object_name))
1811
self.dbus_object_path = dbus.ObjectPath(
1812
"/clients/" + client_object_name)
1221
1813
DBusObjectWithProperties.__init__(self, self.bus,
1222
1814
self.dbus_object_path)
1223
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1226
variant_level=1):
1815
1816
def notifychangeproperty(transform_func, dbus_name,
1817
type_func=lambda x: x,
1818
variant_level=1,
1819
invalidate_only=False,
1820
_interface=_interface):
1227
1821
""" Modify a variable so that it's a property which announces
1228
1822
its changes to DBus.
1229
1823
1230
1824
transform_fun: Function that takes a value and a variant_level
1231
1825
and transforms it to a D-Bus type.
1232
1826
dbus_name: D-Bus name of the variable
1234
1828
to the D-Bus. Default: no transform
1235
1829
variant_level: D-Bus variant level. Default: 1
1236
1830
"""
1237
attrname = "_{0}".format(dbus_name)
1831
attrname = "_{}".format(dbus_name)
1832
1238
1833
def setter(self, value):
1239
1834
if hasattr(self, "dbus_object_path"):
1240
1835
if (not hasattr(self, attrname) or
1241
1836
type_func(getattr(self, attrname, None))
1242
1837
!= type_func(value)):
1243
dbus_value = transform_func(type_func(value),
1244
variant_level
1245
=variant_level)
1246
self.PropertyChanged(dbus.String(dbus_name),
1247
dbus_value)
1838
if invalidate_only:
1839
self.PropertiesChanged(
1840
_interface, dbus.Dictionary(),
1841
dbus.Array((dbus_name, )))
1842
else:
1843
dbus_value = transform_func(
1844
type_func(value),
1845
variant_level=variant_level)
1846
self.PropertyChanged(dbus.String(dbus_name),
1847
dbus_value)
1848
self.PropertiesChanged(
1849
_interface,
1850
dbus.Dictionary({dbus.String(dbus_name):
1851
dbus_value}),
1852
dbus.Array())
1248
1853
setattr(self, attrname, value)
1249
1854
1250
1855
return property(lambda self: getattr(self, attrname), setter)
1251
1856
1252
1857
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1253
1858
approvals_pending = notifychangeproperty(dbus.Boolean,
1254
1859
"ApprovalPending",
1255
type_func = bool)
1860
type_func=bool)
1256
1861
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1257
1862
last_enabled = notifychangeproperty(datetime_to_dbus,
1258
1863
"LastEnabled")
1259
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
type_func = lambda checker:
1261
checker is not None)
1864
checker = notifychangeproperty(
1865
dbus.Boolean, "CheckerRunning",
1866
type_func=lambda checker: checker is not None)
1262
1867
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1263
1868
"LastCheckedOK")
1264
1869
last_checker_status = notifychangeproperty(dbus.Int16,
1267
1872
datetime_to_dbus, "LastApprovalRequest")
1268
1873
approved_by_default = notifychangeproperty(dbus.Boolean,
1269
1874
"ApprovedByDefault")
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1271
"ApprovalDelay",
1272
type_func =
1273
timedelta_to_milliseconds)
1875
approval_delay = notifychangeproperty(
1876
dbus.UInt64, "ApprovalDelay",
1877
type_func=lambda td: td.total_seconds() * 1000)
1274
1878
approval_duration = notifychangeproperty(
1275
1879
dbus.UInt64, "ApprovalDuration",
1276
type_func = timedelta_to_milliseconds)
1880
type_func=lambda td: td.total_seconds() * 1000)
1277
1881
host = notifychangeproperty(dbus.String, "Host")
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1279
type_func =
1280
timedelta_to_milliseconds)
1882
timeout = notifychangeproperty(
1883
dbus.UInt64, "Timeout",
1884
type_func=lambda td: td.total_seconds() * 1000)
1281
1885
extended_timeout = notifychangeproperty(
1282
1886
dbus.UInt64, "ExtendedTimeout",
1283
type_func = timedelta_to_milliseconds)
1284
interval = notifychangeproperty(dbus.UInt64,
1285
"Interval",
1286
type_func =
1287
timedelta_to_milliseconds)
1887
type_func=lambda td: td.total_seconds() * 1000)
1888
interval = notifychangeproperty(
1889
dbus.UInt64, "Interval",
1890
type_func=lambda td: td.total_seconds() * 1000)
1288
1891
checker_command = notifychangeproperty(dbus.String, "Checker")
1289
1892
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1893
invalidate_only=True)
1894
1290
1895
del notifychangeproperty
1291
1896
1292
1897
def __del__(self, *args, **kwargs):
1293
1898
try:
1294
1899
self.remove_from_connection()
1297
1902
if hasattr(DBusObjectWithProperties, "__del__"):
1298
1903
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1299
1904
Client.__del__(self, *args, **kwargs)
1300
1301
def checker_callback(self, pid, condition, command,
1302
*args, **kwargs):
1303
self.checker_callback_tag = None
1304
self.checker = None
1305
if os.WIFEXITED(condition):
1306
exitstatus = os.WEXITSTATUS(condition)
1905
1906
def checker_callback(self, source, condition,
1907
connection, command, *args, **kwargs):
1908
ret = Client.checker_callback(self, source, condition,
1909
connection, command, *args,
1910
**kwargs)
1911
exitstatus = self.last_checker_status
1912
if exitstatus >= 0:
1307
1913
# Emit D-Bus signal
1308
1914
self.CheckerCompleted(dbus.Int16(exitstatus),
1309
dbus.Int64(condition),
1915
# This is specific to GNU libC
1916
dbus.Int64(exitstatus << 8),
1310
1917
dbus.String(command))
1311
1918
else:
1312
1919
# Emit D-Bus signal
1313
1920
self.CheckerCompleted(dbus.Int16(-1),
1314
dbus.Int64(condition),
1921
dbus.Int64(
1922
# This is specific to GNU libC
1923
(exitstatus << 8)
1924
| self.last_checker_signal),
1315
1925
dbus.String(command))
1316
1317
return Client.checker_callback(self, pid, condition, command,
1318
*args, **kwargs)
1319
1926
return ret
1927
1320
1928
def start_checker(self, *args, **kwargs):
1321
old_checker = self.checker
1322
if self.checker is not None:
1323
old_checker_pid = self.checker.pid
1324
else:
1325
old_checker_pid = None
1929
old_checker_pid = getattr(self.checker, "pid", None)
1326
1930
r = Client.start_checker(self, *args, **kwargs)
1327
1931
# Only if new checker process was started
1328
1932
if (self.checker is not None
1330
1934
# Emit D-Bus signal
1331
1935
self.CheckerStarted(self.current_checker_command)
1332
1936
return r
1333
1937
1334
1938
def _reset_approved(self):
1335
1939
self.approved = None
1336
1940
return False
1337
1941
1338
1942
def approve(self, value=True):
1339
1943
self.approved = value
1340
gobject.timeout_add(timedelta_to_milliseconds
1341
(self.approval_duration),
1342
self._reset_approved)
1944
GLib.timeout_add(int(self.approval_duration.total_seconds()
1945
* 1000), self._reset_approved)
1343
1946
self.send_changedstate()
1344
1345
## D-Bus methods, signals & properties
1346
_interface = "se.recompile.Mandos.Client"
1347
1348
## Interfaces
1349
1350
@dbus_interface_annotations(_interface)
1351
def _foo(self):
1352
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1353
"false"}
1354
1355
## Signals
1356
1947
1948
# D-Bus methods, signals & properties
1949
1950
# Interfaces
1951
1952
# Signals
1953
1357
1954
# CheckerCompleted - signal
1358
1955
@dbus.service.signal(_interface, signature="nxs")
1359
1956
def CheckerCompleted(self, exitcode, waitstatus, command):
1360
1957
"D-Bus signal"
1361
1958
pass
1362
1959
1363
1960
# CheckerStarted - signal
1364
1961
@dbus.service.signal(_interface, signature="s")
1365
1962
def CheckerStarted(self, command):
1366
1963
"D-Bus signal"
1367
1964
pass
1368
1965
1369
1966
# PropertyChanged - signal
1967
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1370
1968
@dbus.service.signal(_interface, signature="sv")
1371
1969
def PropertyChanged(self, property, value):
1372
1970
"D-Bus signal"
1373
1971
pass
1374
1972
1375
1973
# GotSecret - signal
1376
1974
@dbus.service.signal(_interface)
1377
1975
def GotSecret(self):
1380
1978
server to mandos-client
1381
1979
"""
1382
1980
pass
1383
1981
1384
1982
# Rejected - signal
1385
1983
@dbus.service.signal(_interface, signature="s")
1386
1984
def Rejected(self, reason):
1387
1985
"D-Bus signal"
1388
1986
pass
1389
1987
1390
1988
# NeedApproval - signal
1391
1989
@dbus.service.signal(_interface, signature="tb")
1392
1990
def NeedApproval(self, timeout, default):
1393
1991
"D-Bus signal"
1394
1992
return self.need_approval()
1395
1396
## Methods
1397
1993
1994
# Methods
1995
1398
1996
# Approve - method
1399
1997
@dbus.service.method(_interface, in_signature="b")
1400
1998
def Approve(self, value):
1401
1999
self.approve(value)
1402
2000
1403
2001
# CheckedOK - method
1404
2002
@dbus.service.method(_interface)
1405
2003
def CheckedOK(self):
1406
2004
self.checked_ok()
1407
2005
1408
2006
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1409
2008
@dbus.service.method(_interface)
1410
2009
def Enable(self):
1411
2010
"D-Bus method"
1412
2011
self.enable()
1413
2012
1414
2013
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1415
2015
@dbus.service.method(_interface)
1416
2016
def StartChecker(self):
1417
2017
"D-Bus method"
1418
2018
self.start_checker()
1419
2019
1420
2020
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1421
2022
@dbus.service.method(_interface)
1422
2023
def Disable(self):
1423
2024
"D-Bus method"
1424
2025
self.disable()
1425
2026
1426
2027
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1427
2029
@dbus.service.method(_interface)
1428
2030
def StopChecker(self):
1429
2031
self.stop_checker()
1430
1431
## Properties
1432
2032
2033
# Properties
2034
1433
2035
# ApprovalPending - property
1434
2036
@dbus_service_property(_interface, signature="b", access="read")
1435
2037
def ApprovalPending_dbus_property(self):
1436
2038
return dbus.Boolean(bool(self.approvals_pending))
1437
2039
1438
2040
# ApprovedByDefault - property
1439
@dbus_service_property(_interface, signature="b",
2041
@dbus_service_property(_interface,
2042
signature="b",
1440
2043
access="readwrite")
1441
2044
def ApprovedByDefault_dbus_property(self, value=None):
1442
2045
if value is None: # get
1443
2046
return dbus.Boolean(self.approved_by_default)
1444
2047
self.approved_by_default = bool(value)
1445
2048
1446
2049
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
2050
@dbus_service_property(_interface,
2051
signature="t",
1448
2052
access="readwrite")
1449
2053
def ApprovalDelay_dbus_property(self, value=None):
1450
2054
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
2055
return dbus.UInt64(self.approval_delay.total_seconds()
2056
* 1000)
1452
2057
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1453
2058
1454
2059
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
2060
@dbus_service_property(_interface,
2061
signature="t",
1456
2062
access="readwrite")
1457
2063
def ApprovalDuration_dbus_property(self, value=None):
1458
2064
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
2065
return dbus.UInt64(self.approval_duration.total_seconds()
2066
* 1000)
1461
2067
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1462
2068
1463
2069
# Name - property
2070
@dbus_annotations(
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
2072
@dbus_service_property(_interface, signature="s", access="read")
1465
2073
def Name_dbus_property(self):
1466
2074
return dbus.String(self.name)
1467
2075
2076
# KeyID - property
2077
@dbus_annotations(
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
@dbus_service_property(_interface, signature="s", access="read")
2080
def KeyID_dbus_property(self):
2081
return dbus.String(self.key_id)
2082
1468
2083
# Fingerprint - property
2084
@dbus_annotations(
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
2086
@dbus_service_property(_interface, signature="s", access="read")
1470
2087
def Fingerprint_dbus_property(self):
1471
2088
return dbus.String(self.fingerprint)
1472
2089
1473
2090
# Host - property
1474
@dbus_service_property(_interface, signature="s",
2091
@dbus_service_property(_interface,
2092
signature="s",
1475
2093
access="readwrite")
1476
2094
def Host_dbus_property(self, value=None):
1477
2095
if value is None: # get
1478
2096
return dbus.String(self.host)
1479
self.host = unicode(value)
1480
2097
self.host = str(value)
2098
1481
2099
# Created - property
2100
@dbus_annotations(
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
2102
@dbus_service_property(_interface, signature="s", access="read")
1483
2103
def Created_dbus_property(self):
1484
2104
return datetime_to_dbus(self.created)
1485
2105
1486
2106
# LastEnabled - property
1487
2107
@dbus_service_property(_interface, signature="s", access="read")
1488
2108
def LastEnabled_dbus_property(self):
1489
2109
return datetime_to_dbus(self.last_enabled)
1490
2110
1491
2111
# Enabled - property
1492
@dbus_service_property(_interface, signature="b",
2112
@dbus_service_property(_interface,
2113
signature="b",
1493
2114
access="readwrite")
1494
2115
def Enabled_dbus_property(self, value=None):
1495
2116
if value is None: # get
1498
2119
self.enable()
1499
2120
else:
1500
2121
self.disable()
1501
2122
1502
2123
# LastCheckedOK - property
1503
@dbus_service_property(_interface, signature="s",
2124
@dbus_service_property(_interface,
2125
signature="s",
1504
2126
access="readwrite")
1505
2127
def LastCheckedOK_dbus_property(self, value=None):
1506
2128
if value is not None:
1507
2129
self.checked_ok()
1508
2130
return
1509
2131
return datetime_to_dbus(self.last_checked_ok)
1510
2132
1511
2133
# LastCheckerStatus - property
1512
@dbus_service_property(_interface, signature="n",
1513
access="read")
2134
@dbus_service_property(_interface, signature="n", access="read")
1514
2135
def LastCheckerStatus_dbus_property(self):
1515
2136
return dbus.Int16(self.last_checker_status)
1516
2137
1517
2138
# Expires - property
1518
2139
@dbus_service_property(_interface, signature="s", access="read")
1519
2140
def Expires_dbus_property(self):
1520
2141
return datetime_to_dbus(self.expires)
1521
2142
1522
2143
# LastApprovalRequest - property
1523
2144
@dbus_service_property(_interface, signature="s", access="read")
1524
2145
def LastApprovalRequest_dbus_property(self):
1525
2146
return datetime_to_dbus(self.last_approval_request)
1526
2147
1527
2148
# Timeout - property
1528
@dbus_service_property(_interface, signature="t",
2149
@dbus_service_property(_interface,
2150
signature="t",
1529
2151
access="readwrite")
1530
2152
def Timeout_dbus_property(self, value=None):
1531
2153
if value is None: # get
1532
return dbus.UInt64(self.timeout_milliseconds())
2154
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1533
2155
old_timeout = self.timeout
1534
2156
self.timeout = datetime.timedelta(0, 0, 0, value)
1535
2157
# Reschedule disabling
1543
2165
if (getattr(self, "disable_initiator_tag", None)
1544
2166
is None):
1545
2167
return
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1550
self.disable))
1551
2168
GLib.source_remove(self.disable_initiator_tag)
2169
self.disable_initiator_tag = GLib.timeout_add(
2170
int((self.expires - now).total_seconds() * 1000),
2171
self.disable)
2172
1552
2173
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2174
@dbus_service_property(_interface,
2175
signature="t",
1554
2176
access="readwrite")
1555
2177
def ExtendedTimeout_dbus_property(self, value=None):
1556
2178
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
2180
* 1000)
1558
2181
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1559
2182
1560
2183
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2184
@dbus_service_property(_interface,
2185
signature="t",
1562
2186
access="readwrite")
1563
2187
def Interval_dbus_property(self, value=None):
1564
2188
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2190
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2191
if getattr(self, "checker_initiator_tag", None) is None:
1568
2192
return
1569
2193
if self.enabled:
1570
2194
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
1575
2195
GLib.source_remove(self.checker_initiator_tag)
2196
self.checker_initiator_tag = GLib.timeout_add(
2197
value, self.start_checker)
2198
self.start_checker() # Start one now, too
2199
1576
2200
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2201
@dbus_service_property(_interface,
2202
signature="s",
1578
2203
access="readwrite")
1579
2204
def Checker_dbus_property(self, value=None):
1580
2205
if value is None: # get
1581
2206
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
1583
2207
self.checker_command = str(value)
2208
1584
2209
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2210
@dbus_service_property(_interface,
2211
signature="b",
1586
2212
access="readwrite")
1587
2213
def CheckerRunning_dbus_property(self, value=None):
1588
2214
if value is None: # get
1591
2217
self.start_checker()
1592
2218
else:
1593
2219
self.stop_checker()
1594
2220
1595
2221
# ObjectPath - property
2222
@dbus_annotations(
2223
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2224
"org.freedesktop.DBus.Deprecated": "true"})
1596
2225
@dbus_service_property(_interface, signature="o", access="read")
1597
2226
def ObjectPath_dbus_property(self):
1598
return self.dbus_object_path # is already a dbus.ObjectPath
1599
2227
return self.dbus_object_path # is already a dbus.ObjectPath
2228
1600
2229
# Secret = property
1601
@dbus_service_property(_interface, signature="ay",
1602
access="write", byte_arrays=True)
2230
@dbus_annotations(
2231
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2232
"invalidates"})
2233
@dbus_service_property(_interface,
2234
signature="ay",
2235
access="write",
2236
byte_arrays=True)
1603
2237
def Secret_dbus_property(self, value):
1604
self.secret = str(value)
1605
2238
self.secret = bytes(value)
2239
1606
2240
del _interface
1607
2241
1608
2242
1609
class ProxyClient(object):
1610
def __init__(self, child_pipe, fpr, address):
2243
class ProxyClient:
2244
def __init__(self, child_pipe, key_id, fpr, address):
1611
2245
self._pipe = child_pipe
1612
self._pipe.send(('init', fpr, address))
2246
self._pipe.send(('init', key_id, fpr, address))
1613
2247
if not self._pipe.recv():
1614
raise KeyError()
1615
2248
raise KeyError(key_id or fpr)
2249
1616
2250
def __getattribute__(self, name):
1617
2251
if name == '_pipe':
1618
2252
return super(ProxyClient, self).__getattribute__(name)
1621
2255
if data[0] == 'data':
1622
2256
return data[1]
1623
2257
if data[0] == 'function':
2258
1624
2259
def func(*args, **kwargs):
1625
2260
self._pipe.send(('funcall', name, args, kwargs))
1626
2261
return self._pipe.recv()[1]
2262
1627
2263
return func
1628
2264
1629
2265
def __setattr__(self, name, value):
1630
2266
if name == '_pipe':
1631
2267
return super(ProxyClient, self).__setattr__(name, value)
1634
2270
1635
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
2272
"""A class to handle client connections.
1637
2273
1638
2274
Instantiated once for each connection to handle it.
1639
2275
Note: This will run in its own forked process."""
1640
2276
1641
2277
def handle(self):
1642
2278
with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
2279
logger.info("TCP connection from: %s",
1644
unicode(self.client_address))
2280
str(self.client_address))
1645
2281
logger.debug("Pipe FD: %d",
1646
2282
self.server.child_pipe.fileno())
1647
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1650
gnutls.connection
1651
.X509Credentials()))
1652
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1657
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
1661
# "+DHE-DSS"))
2283
2284
session = gnutls.ClientSession(self.request)
2285
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
2289
# "+DHE-DSS"))
1662
2290
# Use a fallback default, since this MUST be set.
1663
2291
priority = self.server.gnutls_priority
1664
2292
if priority is None:
1665
2293
priority = "NORMAL"
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
1668
priority, None))
1669
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
2296
None)
2297
1670
2298
# Start communication using the Mandos protocol
1671
2299
# Get protocol number
1672
2300
line = self.request.makefile().readline()
1673
2301
logger.debug("Protocol version: %r", line)
1674
2302
try:
1675
2303
if int(line.strip().split()[0]) > 1:
1676
raise RuntimeError
2304
raise RuntimeError(line)
1677
2305
except (ValueError, IndexError, RuntimeError) as error:
1678
2306
logger.error("Unknown protocol version: %s", error)
1679
2307
return
1680
2308
1681
2309
# Start GnuTLS connection
1682
2310
try:
1683
2311
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
2312
except gnutls.Error as error:
1685
2313
logger.warning("Handshake failed: %s", error)
1686
2314
# Do not run session.bye() here: the session is not
1687
2315
# established. Just abandon the request.
1688
2316
return
1689
2317
logger.debug("Handshake succeeded")
1690
2318
1691
2319
approval_required = False
1692
2320
try:
1693
try:
1694
fpr = self.fingerprint(self.peer_certificate
1695
(session))
1696
except (TypeError,
1697
gnutls.errors.GNUTLSError) as error:
1698
logger.warning("Bad certificate: %s", error)
1699
return
1700
logger.debug("Fingerprint: %s", fpr)
1701
1702
try:
1703
client = ProxyClient(child_pipe, fpr,
2321
if gnutls.has_rawpk:
2322
fpr = b""
2323
try:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2328
return
2329
logger.debug("Key ID: %s", key_id)
2330
2331
else:
2332
key_id = b""
2333
try:
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2338
return
2339
logger.debug("Fingerprint: %s", fpr)
2340
2341
try:
2342
client = ProxyClient(child_pipe, key_id, fpr,
1704
2343
self.client_address)
1705
2344
except KeyError:
1706
2345
return
1707
2346
1708
2347
if client.approval_delay:
1709
2348
delay = client.approval_delay
1710
2349
client.approvals_pending += 1
1711
2350
approval_required = True
1712
2351
1713
2352
while True:
1714
2353
if not client.enabled:
1715
2354
logger.info("Client %s is disabled",
1716
client.name)
2355
client.name)
1717
2356
if self.server.use_dbus:
1718
2357
# Emit D-Bus signal
1719
2358
client.Rejected("Disabled")
1720
2359
return
1721
2360
1722
2361
if client.approved or not client.approval_delay:
1723
#We are approved or approval is disabled
2362
# We are approved or approval is disabled
1724
2363
break
1725
2364
elif client.approved is None:
1726
2365
logger.info("Client %s needs approval",
1728
2367
if self.server.use_dbus:
1729
2368
# Emit D-Bus signal
1730
2369
client.NeedApproval(
1731
client.approval_delay_milliseconds(),
1732
client.approved_by_default)
2370
client.approval_delay.total_seconds()
2371
* 1000, client.approved_by_default)
1733
2372
else:
1734
2373
logger.warning("Client %s was not approved",
1735
2374
client.name)
1737
2376
# Emit D-Bus signal
1738
2377
client.Rejected("Denied")
1739
2378
return
1740
1741
#wait until timeout or approved
2379
2380
# wait until timeout or approved
1742
2381
time = datetime.datetime.now()
1743
2382
client.changedstate.acquire()
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1746
/ 1000))
2383
client.changedstate.wait(delay.total_seconds())
1747
2384
client.changedstate.release()
1748
2385
time2 = datetime.datetime.now()
1749
2386
if (time2 - time) >= delay:
1759
2396
break
1760
2397
else:
1761
2398
delay -= time2 - time
1762
1763
sent_size = 0
1764
while sent_size < len(client.secret):
1765
try:
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1769
exc_info=error)
1770
return
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
1774
sent_size += sent
1775
2399
2400
try:
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
2404
exc_info=error)
2405
return
2406
1776
2407
logger.info("Sending secret to %s", client.name)
1777
2408
# bump the timeout using extended_timeout
1778
2409
client.bump_timeout(client.extended_timeout)
1779
2410
if self.server.use_dbus:
1780
2411
# Emit D-Bus signal
1781
2412
client.GotSecret()
1782
2413
1783
2414
finally:
1784
2415
if approval_required:
1785
2416
client.approvals_pending -= 1
1786
2417
try:
1787
2418
session.bye()
1788
except gnutls.errors.GNUTLSError as error:
2419
except gnutls.Error as error:
1789
2420
logger.warning("GnuTLS bye failed",
1790
2421
exc_info=error)
1791
2422
1792
2423
@staticmethod
1793
2424
def peer_certificate(session):
1794
"Return the peer's OpenPGP certificate as a bytestring"
1795
# If not an OpenPGP certificate...
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
return session.peer_certificate
2425
"Return the peer's certificate as a bytestring"
2426
try:
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2428
gnutls.CTYPE_PEERS)
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2433
else:
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2438
valid_cert_types)
2439
# ...return invalid data
2440
return b""
1801
2441
list_size = ctypes.c_uint(1)
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2442
cert_list = (gnutls.certificate_get_peers
1804
2443
(session._c_object, ctypes.byref(list_size)))
1805
2444
if not bool(cert_list) and list_size.value != 0:
1806
raise gnutls.errors.GNUTLSError("error getting peer"
1807
" certificate")
2445
raise gnutls.Error("error getting peer certificate")
1808
2446
if list_size.value == 0:
1809
2447
return None
1810
2448
cert = cert_list[0]
1811
2449
return ctypes.string_at(cert.data, cert.size)
1812
2450
2451
@staticmethod
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2478
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
2483
return hex_key_id
2484
1813
2485
@staticmethod
1814
2486
def fingerprint(openpgp):
1815
2487
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2488
# New GnuTLS "datum" with the OpenPGP public key
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1819
ctypes.POINTER
1820
(ctypes.c_ubyte)),
1821
ctypes.c_uint(len(openpgp))))
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
1822
2493
# New empty GnuTLS certificate
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2496
# Import the OpenPGP public key into the certificate
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1831
2499
# Verify the self signature in the key
1832
2500
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1836
2503
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
1839
("Verify failed"))
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
2506
=crtverify.value)
1840
2507
# New buffer for the fingerprint
1841
2508
buf = ctypes.create_string_buffer(20)
1842
2509
buf_len = ctypes.c_size_t()
1843
2510
# Get the fingerprint from the certificate into the buffer
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1847
2513
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2514
gnutls.openpgp_crt_deinit(crt)
1849
2515
# Convert the buffer to a Python bytestring
1850
2516
fpr = ctypes.string_at(buf, buf_len.value)
1851
2517
# Convert the bytestring to hexadecimal notation
1853
2519
return hex_fpr
1854
2520
1855
2521
1856
class MultiprocessingMixIn(object):
2522
class MultiprocessingMixIn:
1857
2523
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2524
1858
2525
def sub_process_main(self, request, address):
1859
2526
try:
1860
2527
self.finish_request(request, address)
1861
2528
except Exception:
1862
2529
self.handle_error(request, address)
1863
2530
self.close_request(request)
1864
2531
1865
2532
def process_request(self, request, address):
1866
2533
"""Start a new process to process the request."""
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
1869
2536
proc.start()
1870
2537
return proc
1871
2538
1872
2539
1873
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1874
2541
""" adds a pipe to the MixIn """
2542
1875
2543
def process_request(self, request, client_address):
1876
2544
"""Overrides and wraps the original process_request().
1877
2545
1878
2546
This function creates a new pipe in self.pipe
1879
2547
"""
1880
2548
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1881
2549
1882
2550
proc = MultiprocessingMixIn.process_request(self, request,
1883
2551
client_address)
1884
2552
self.child_pipe.close()
1885
2553
self.add_pipe(parent_pipe, proc)
1886
2554
1887
2555
def add_pipe(self, parent_pipe, proc):
1888
2556
"""Dummy function; override as necessary"""
1889
raise NotImplementedError
2557
raise NotImplementedError()
1890
2558
1891
2559
1892
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
socketserver.TCPServer, object):
2561
socketserver.TCPServer):
1894
2562
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1895
2563
1896
2564
Attributes:
1897
2565
enabled: Boolean; whether this server is activated yet
1898
2566
interface: None or a network interface name (string)
1899
2567
use_ipv6: Boolean; to use IPv6 or not
1900
2568
"""
2569
1901
2570
def __init__(self, server_address, RequestHandlerClass,
1902
interface=None, use_ipv6=True):
2571
interface=None,
2572
use_ipv6=True,
2573
socketfd=None):
2574
"""If socketfd is set, use that file descriptor instead of
2575
creating a new one with socket.socket().
2576
"""
1903
2577
self.interface = interface
1904
2578
if use_ipv6:
1905
2579
self.address_family = socket.AF_INET6
2580
if socketfd is not None:
2581
# Save the file descriptor
2582
self.socketfd = socketfd
2583
# Save the original socket.socket() function
2584
self.socket_socket = socket.socket
2585
2586
# To implement --socket, we monkey patch socket.socket.
2587
#
2588
# (When socketserver.TCPServer is a new-style class, we
2589
# could make self.socket into a property instead of monkey
2590
# patching socket.socket.)
2591
#
2592
# Create a one-time-only replacement for socket.socket()
2593
@functools.wraps(socket.socket)
2594
def socket_wrapper(*args, **kwargs):
2595
# Restore original function so subsequent calls are
2596
# not affected.
2597
socket.socket = self.socket_socket
2598
del self.socket_socket
2599
# This time only, return a new socket object from the
2600
# saved file descriptor.
2601
return socket.fromfd(self.socketfd, *args, **kwargs)
2602
# Replace socket.socket() function with wrapper
2603
socket.socket = socket_wrapper
2604
# The socketserver.TCPServer.__init__ will call
2605
# socket.socket(), which might be our replacement,
2606
# socket_wrapper(), if socketfd was set.
1906
2607
socketserver.TCPServer.__init__(self, server_address,
1907
2608
RequestHandlerClass)
2609
1908
2610
def server_bind(self):
1909
2611
"""This overrides the normal server_bind() function
1910
2612
to bind to an interface if one was specified, and also NOT to
1911
2613
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
1912
2615
if self.interface is not None:
1913
2616
if SO_BINDTODEVICE is None:
1914
logger.error("SO_BINDTODEVICE does not exist;"
1915
" cannot bind to interface %s",
1916
self.interface)
1917
else:
1918
try:
1919
self.socket.setsockopt(socket.SOL_SOCKET,
1920
SO_BINDTODEVICE,
1921
str(self.interface
1922
+ '\0'))
1923
except socket.error as error:
1924
if error.errno == errno.EPERM:
1925
logger.error("No permission to"
1926
" bind to interface %s",
1927
self.interface)
1928
elif error.errno == errno.ENOPROTOOPT:
1929
logger.error("SO_BINDTODEVICE not available;"
1930
" cannot bind to interface %s",
1931
self.interface)
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
1935
self.interface)
1936
else:
1937
raise
2617
# Fall back to a hard-coded value which seems to be
2618
# common enough.
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2621
try:
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2632
self.interface)
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
2636
else:
2637
raise
1938
2638
# Only bind(2) the socket if we really need to.
1939
2639
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
1940
2642
if not self.server_address[0]:
1941
2643
if self.address_family == socket.AF_INET6:
1942
any_address = "::" # in6addr_any
2644
any_address = "::" # in6addr_any
1943
2645
else:
1944
any_address = socket.INADDR_ANY
2646
any_address = "0.0.0.0" # INADDR_ANY
1945
2647
self.server_address = (any_address,
1946
2648
self.server_address[1])
1947
2649
elif not self.server_address[1]:
1948
self.server_address = (self.server_address[0],
1949
0)
2650
self.server_address = (self.server_address[0], 0)
1950
2651
# if self.interface:
1951
2652
# self.server_address = (self.server_address[0],
1952
2653
# 0, # port
1958
2659
1959
2660
class MandosServer(IPv6_TCPServer):
1960
2661
"""Mandos server.
1961
2662
1962
2663
Attributes:
1963
2664
clients: set of Client objects
1964
2665
gnutls_priority GnuTLS priority string
1965
2666
use_dbus: Boolean; to emit D-Bus signals or not
1966
1967
Assumes a gobject.MainLoop event loop.
2667
2668
Assumes a GLib.MainLoop event loop.
1968
2669
"""
2670
1969
2671
def __init__(self, server_address, RequestHandlerClass,
1970
interface=None, use_ipv6=True, clients=None,
1971
gnutls_priority=None, use_dbus=True):
2672
interface=None,
2673
use_ipv6=True,
2674
clients=None,
2675
gnutls_priority=None,
2676
use_dbus=True,
2677
socketfd=None):
1972
2678
self.enabled = False
1973
2679
self.clients = clients
1974
2680
if self.clients is None:
1977
2683
self.gnutls_priority = gnutls_priority
1978
2684
IPv6_TCPServer.__init__(self, server_address,
1979
2685
RequestHandlerClass,
1980
interface = interface,
1981
use_ipv6 = use_ipv6)
2686
interface=interface,
2687
use_ipv6=use_ipv6,
2688
socketfd=socketfd)
2689
1982
2690
def server_activate(self):
1983
2691
if self.enabled:
1984
2692
return socketserver.TCPServer.server_activate(self)
1985
2693
1986
2694
def enable(self):
1987
2695
self.enabled = True
1988
2696
1989
2697
def add_pipe(self, parent_pipe, proc):
1990
2698
# Call "handle_ipc" for both data and EOF events
1991
gobject.io_add_watch(parent_pipe.fileno(),
1992
gobject.IO_IN | gobject.IO_HUP,
1993
functools.partial(self.handle_ipc,
1994
parent_pipe =
1995
parent_pipe,
1996
proc = proc))
1997
1998
def handle_ipc(self, source, condition, parent_pipe=None,
1999
proc = None, client_object=None):
2699
GLib.io_add_watch(
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2702
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2704
proc=proc))
2705
2706
def handle_ipc(self, source, condition,
2707
parent_pipe=None,
2708
proc=None,
2709
client_object=None):
2000
2710
# error, or the other end of multiprocessing.Pipe has closed
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2002
2712
# Wait for other process to exit
2003
2713
proc.join()
2004
2714
return False
2005
2715
2006
2716
# Read a request from the child
2007
2717
request = parent_pipe.recv()
2008
2718
command = request[0]
2009
2719
2010
2720
if command == 'init':
2011
fpr = request[1]
2012
address = request[2]
2013
2014
for c in self.clients.itervalues():
2015
if c.fingerprint == fpr:
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2724
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2727
continue
2728
if key_id and c.key_id == key_id:
2729
client = c
2730
break
2731
if fpr and c.fingerprint == fpr:
2016
2732
client = c
2017
2733
break
2018
2734
else:
2019
logger.info("Client not found for fingerprint: %s, ad"
2020
"dress: %s", fpr, address)
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2021
2737
if self.use_dbus:
2022
2738
# Emit D-Bus signal
2023
mandos_dbus_service.ClientNotFound(fpr,
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2024
2740
address[0])
2025
2741
parent_pipe.send(False)
2026
2742
return False
2027
2028
gobject.io_add_watch(parent_pipe.fileno(),
2029
gobject.IO_IN | gobject.IO_HUP,
2030
functools.partial(self.handle_ipc,
2031
parent_pipe =
2032
parent_pipe,
2033
proc = proc,
2034
client_object =
2035
client))
2743
2744
GLib.io_add_watch(
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2747
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2749
proc=proc,
2750
client_object=client))
2036
2751
parent_pipe.send(True)
2037
2752
# remove the old hook in favor of the new above hook on
2038
2753
# same fileno
2041
2756
funcname = request[1]
2042
2757
args = request[2]
2043
2758
kwargs = request[3]
2044
2759
2045
2760
parent_pipe.send(('data', getattr(client_object,
2046
2761
funcname)(*args,
2047
**kwargs)))
2048
2762
**kwargs)))
2763
2049
2764
if command == 'getattr':
2050
2765
attrname = request[1]
2051
if callable(client_object.__getattribute__(attrname)):
2052
parent_pipe.send(('function',))
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
2053
2769
else:
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
2056
2770
parent_pipe.send((
2771
'data', client_object.__getattribute__(attrname)))
2772
2057
2773
if command == 'setattr':
2058
2774
attrname = request[1]
2059
2775
value = request[2]
2060
2776
setattr(client_object, attrname, value)
2061
2777
2062
2778
return True
2063
2779
2064
2780
2781
def rfc3339_duration_to_delta(duration):
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2783
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2785
True
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2787
True
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2789
True
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2791
True
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2793
True
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2795
True
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2797
True
2798
"""
2799
2800
# Parsing an RFC 3339 duration with regular expressions is not
2801
# possible - there would have to be multiple places for the same
2802
# values, like seconds. The current code, while more esoteric, is
2803
# cleaner without depending on a parsing library. If Python had a
2804
# built-in library for parsing we would use it, but we'd like to
2805
# avoid excessive use of external libraries.
2806
2807
# New type for defining tokens, syntax, and semantics all-in-one
2808
Token = collections.namedtuple("Token", (
2809
"regexp", # To match token; if "value" is not None, must have
2810
# a "group" containing digits
2811
"value", # datetime.timedelta or None
2812
"followers")) # Tokens valid after this token
2813
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
token_end = Token(re.compile(r"$"), None, frozenset())
2816
token_second = Token(re.compile(r"(\d+)S"),
2817
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2819
token_minute = Token(re.compile(r"(\d+)M"),
2820
datetime.timedelta(minutes=1),
2821
frozenset((token_second, token_end)))
2822
token_hour = Token(re.compile(r"(\d+)H"),
2823
datetime.timedelta(hours=1),
2824
frozenset((token_minute, token_end)))
2825
token_time = Token(re.compile(r"T"),
2826
None,
2827
frozenset((token_hour, token_minute,
2828
token_second)))
2829
token_day = Token(re.compile(r"(\d+)D"),
2830
datetime.timedelta(days=1),
2831
frozenset((token_time, token_end)))
2832
token_month = Token(re.compile(r"(\d+)M"),
2833
datetime.timedelta(weeks=4),
2834
frozenset((token_day, token_end)))
2835
token_year = Token(re.compile(r"(\d+)Y"),
2836
datetime.timedelta(weeks=52),
2837
frozenset((token_month, token_end)))
2838
token_week = Token(re.compile(r"(\d+)W"),
2839
datetime.timedelta(weeks=1),
2840
frozenset((token_end, )))
2841
token_duration = Token(re.compile(r"P"), None,
2842
frozenset((token_year, token_month,
2843
token_day, token_time,
2844
token_week)))
2845
# Define starting values:
2846
# Value so far
2847
value = datetime.timedelta()
2848
found_token = None
2849
# Following valid tokens
2850
followers = frozenset((token_duration, ))
2851
# String left to parse
2852
s = duration
2853
# Loop until end token is found
2854
while found_token is not token_end:
2855
# Search for any currently valid tokens
2856
for token in followers:
2857
match = token.regexp.match(s)
2858
if match is not None:
2859
# Token found
2860
if token.value is not None:
2861
# Value found, parse digits
2862
factor = int(match.group(1), 10)
2863
# Add to value so far
2864
value += factor * token.value
2865
# Strip token from string
2866
s = token.regexp.sub("", s, 1)
2867
# Go to found token
2868
found_token = token
2869
# Set valid next tokens
2870
followers = found_token.followers
2871
break
2872
else:
2873
# No currently valid tokens were found
2874
raise ValueError("Invalid RFC 3339 duration: {!r}"
2875
.format(duration))
2876
# End token found
2877
return value
2878
2879
2065
2880
def string_to_delta(interval):
2066
2881
"""Parse a string and return a datetime.timedelta
2067
2068
>>> string_to_delta('7d')
2069
datetime.timedelta(7)
2070
>>> string_to_delta('60s')
2071
datetime.timedelta(0, 60)
2072
>>> string_to_delta('60m')
2073
datetime.timedelta(0, 3600)
2074
>>> string_to_delta('24h')
2075
datetime.timedelta(1)
2076
>>> string_to_delta('1w')
2077
datetime.timedelta(7)
2078
>>> string_to_delta('5m 30s')
2079
datetime.timedelta(0, 330)
2882
2883
>>> string_to_delta('7d') == datetime.timedelta(7)
2884
True
2885
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2886
True
2887
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2888
True
2889
>>> string_to_delta('24h') == datetime.timedelta(1)
2890
True
2891
>>> string_to_delta('1w') == datetime.timedelta(7)
2892
True
2893
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2894
True
2080
2895
"""
2896
2897
try:
2898
return rfc3339_duration_to_delta(interval)
2899
except ValueError:
2900
pass
2901
2081
2902
timevalue = datetime.timedelta(0)
2082
2903
for s in interval.split():
2083
2904
try:
2084
suffix = unicode(s[-1])
2905
suffix = s[-1]
2085
2906
value = int(s[:-1])
2086
2907
if suffix == "d":
2087
2908
delta = datetime.timedelta(value)
2094
2915
elif suffix == "w":
2095
2916
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2096
2917
else:
2097
raise ValueError("Unknown suffix {0!r}"
2098
.format(suffix))
2099
except (ValueError, IndexError) as e:
2918
raise ValueError("Unknown suffix {!r}".format(suffix))
2919
except IndexError as e:
2100
2920
raise ValueError(*(e.args))
2101
2921
timevalue += delta
2102
2922
return timevalue
2103
2923
2104
2924
2105
def daemon(nochdir = False, noclose = False):
2925
def daemon(nochdir=False, noclose=False):
2106
2926
"""See daemon(3). Standard BSD Unix function.
2107
2927
2108
2928
This should really exist as os.daemon, but it doesn't (yet)."""
2109
2929
if os.fork():
2110
2930
sys.exit()
2118
2938
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2119
2939
if not stat.S_ISCHR(os.fstat(null).st_mode):
2120
2940
raise OSError(errno.ENODEV,
2121
"{0} not a character device"
2941
"{} not a character device"
2122
2942
.format(os.devnull))
2123
2943
os.dup2(null, sys.stdin.fileno())
2124
2944
os.dup2(null, sys.stdout.fileno())
2128
2948
2129
2949
2130
2950
def main():
2131
2951
2132
2952
##################################################################
2133
2953
# Parsing of options, both command line and config file
2134
2954
2135
2955
parser = argparse.ArgumentParser()
2136
2956
parser.add_argument("-v", "--version", action="version",
2137
version = "%(prog)s {0}".format(version),
2957
version="%(prog)s {}".format(version),
2138
2958
help="show version number and exit")
2139
2959
parser.add_argument("-i", "--interface", metavar="IF",
2140
2960
help="Bind to interface IF")
2146
2966
help="Run self-test")
2147
2967
parser.add_argument("--debug", action="store_true",
2148
2968
help="Debug mode; run in foreground and log"
2149
" to terminal")
2969
" to terminal", default=None)
2150
2970
parser.add_argument("--debuglevel", metavar="LEVEL",
2151
2971
help="Debug level for stdout output")
2152
2972
parser.add_argument("--priority", help="GnuTLS"
2159
2979
" files")
2160
2980
parser.add_argument("--no-dbus", action="store_false",
2161
2981
dest="use_dbus", help="Do not provide D-Bus"
2162
" system bus interface")
2982
" system bus interface", default=None)
2163
2983
parser.add_argument("--no-ipv6", action="store_false",
2164
dest="use_ipv6", help="Do not use IPv6")
2984
dest="use_ipv6", help="Do not use IPv6",
2985
default=None)
2165
2986
parser.add_argument("--no-restore", action="store_false",
2166
2987
dest="restore", help="Do not restore stored"
2167
" state")
2988
" state", default=None)
2989
parser.add_argument("--socket", type=int,
2990
help="Specify a file descriptor to a network"
2991
" socket to use instead of creating one")
2168
2992
parser.add_argument("--statedir", metavar="DIR",
2169
2993
help="Directory to save/restore state in")
2170
2994
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
2998
default=None)
2999
2171
3000
options = parser.parse_args()
2172
2173
if options.check:
2174
import doctest
2175
doctest.testmod()
2176
sys.exit()
2177
3001
2178
3002
# Default values for config file for server-global settings
2179
server_defaults = { "interface": "",
2180
"address": "",
2181
"port": "",
2182
"debug": "False",
2183
"priority":
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
"servicename": "Mandos",
2186
"use_dbus": "True",
2187
"use_ipv6": "True",
2188
"debuglevel": "",
2189
"restore": "True",
2190
"statedir": "/var/lib/mandos"
2191
}
2192
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3006
else:
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3010
"address": "",
3011
"port": "",
3012
"debug": "False",
3013
"priority": priority,
3014
"servicename": "Mandos",
3015
"use_dbus": "True",
3016
"use_ipv6": "True",
3017
"debuglevel": "",
3018
"restore": "True",
3019
"socket": "",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
3022
"zeroconf": "True",
3023
}
3024
del priority
3025
2193
3026
# Parse config file for server-global settings
2194
server_config = configparser.SafeConfigParser(server_defaults)
3027
server_config = configparser.ConfigParser(server_defaults)
2195
3028
del server_defaults
2196
server_config.read(os.path.join(options.configdir,
2197
"mandos.conf"))
2198
# Convert the SafeConfigParser object to a dict
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
2199
3031
server_settings = server_config.defaults()
2200
3032
# Use the appropriate methods on the non-string config options
2201
for option in ("debug", "use_dbus", "use_ipv6"):
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2202
3035
server_settings[option] = server_config.getboolean("DEFAULT",
2203
3036
option)
2204
3037
if server_settings["port"]:
2205
3038
server_settings["port"] = server_config.getint("DEFAULT",
2206
3039
"port")
3040
if server_settings["socket"]:
3041
server_settings["socket"] = server_config.getint("DEFAULT",
3042
"socket")
3043
# Later, stdin will, and stdout and stderr might, be dup'ed
3044
# over with an opened os.devnull. But we don't want this to
3045
# happen with a supplied network socket.
3046
if 0 <= server_settings["socket"] <= 2:
3047
server_settings["socket"] = os.dup(server_settings
3048
["socket"])
2207
3049
del server_config
2208
3050
2209
3051
# Override the settings from the config file with command line
2210
3052
# options, if set.
2211
3053
for option in ("interface", "address", "port", "debug",
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2214
"statedir"):
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
2215
3057
value = getattr(options, option)
2216
3058
if value is not None:
2217
3059
server_settings[option] = value
2218
3060
del options
2219
3061
# Force all strings to be unicode
2220
3062
for option in server_settings.keys():
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
3063
if isinstance(server_settings[option], bytes):
3064
server_settings[option] = (server_settings[option]
3065
.decode("utf-8"))
3066
# Force all boolean options to be boolean
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = bool(server_settings[option])
3070
# Debug implies foreground
3071
if server_settings["debug"]:
3072
server_settings["foreground"] = True
2223
3073
# Now we have our good server settings in "server_settings"
2224
3074
2225
3075
##################################################################
2226
3076
3077
if (not server_settings["zeroconf"]
3078
and not (server_settings["port"]
3079
or server_settings["socket"] != "")):
3080
parser.error("Needs port or socket to work without Zeroconf")
3081
2227
3082
# For convenience
2228
3083
debug = server_settings["debug"]
2229
3084
debuglevel = server_settings["debuglevel"]
2231
3086
use_ipv6 = server_settings["use_ipv6"]
2232
3087
stored_state_path = os.path.join(server_settings["statedir"],
2233
3088
stored_state_file)
2234
3089
foreground = server_settings["foreground"]
3090
zeroconf = server_settings["zeroconf"]
3091
2235
3092
if debug:
2236
3093
initlogger(debug, logging.DEBUG)
2237
3094
else:
2240
3097
else:
2241
3098
level = getattr(logging, debuglevel.upper())
2242
3099
initlogger(debug, level)
2243
3100
2244
3101
if server_settings["servicename"] != "Mandos":
2245
syslogger.setFormatter(logging.Formatter
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2249
["servicename"])))
2250
3102
syslogger.setFormatter(
3103
logging.Formatter('Mandos ({}) [%(process)d]:'
3104
' %(levelname)s: %(message)s'.format(
3105
server_settings["servicename"])))
3106
2251
3107
# Parse config file with clients
2252
client_config = configparser.SafeConfigParser(Client
2253
.client_defaults)
3108
client_config = configparser.ConfigParser(Client.client_defaults)
2254
3109
client_config.read(os.path.join(server_settings["configdir"],
2255
3110
"clients.conf"))
2256
3111
2257
3112
global mandos_dbus_service
2258
3113
mandos_dbus_service = None
2259
2260
tcp_server = MandosServer((server_settings["address"],
2261
server_settings["port"]),
2262
ClientHandler,
2263
interface=(server_settings["interface"]
2264
or None),
2265
use_ipv6=use_ipv6,
2266
gnutls_priority=
2267
server_settings["priority"],
2268
use_dbus=use_dbus)
2269
if not debug:
2270
pidfilename = "/var/run/mandos.pid"
3114
3115
socketfd = None
3116
if server_settings["socket"] != "":
3117
socketfd = server_settings["socket"]
3118
tcp_server = MandosServer(
3119
(server_settings["address"], server_settings["port"]),
3120
ClientHandler,
3121
interface=(server_settings["interface"] or None),
3122
use_ipv6=use_ipv6,
3123
gnutls_priority=server_settings["priority"],
3124
use_dbus=use_dbus,
3125
socketfd=socketfd)
3126
if not foreground:
3127
pidfilename = "/run/mandos.pid"
3128
if not os.path.isdir("/run/."):
3129
pidfilename = "/var/run/mandos.pid"
3130
pidfile = None
2271
3131
try:
2272
pidfile = open(pidfilename, "w")
3132
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2273
3133
except IOError as e:
2274
3134
logger.error("Could not open file %r", pidfilename,
2275
3135
exc_info=e)
2276
2277
for name in ("_mandos", "mandos", "nobody"):
3136
3137
for name, group in (("_mandos", "_mandos"),
3138
("mandos", "mandos"),
3139
("nobody", "nogroup")):
2278
3140
try:
2279
3141
uid = pwd.getpwnam(name).pw_uid
2280
gid = pwd.getpwnam(name).pw_gid
3142
gid = pwd.getpwnam(group).pw_gid
2281
3143
break
2282
3144
except KeyError:
2283
3145
continue
2287
3149
try:
2288
3150
os.setgid(gid)
2289
3151
os.setuid(uid)
3152
if debug:
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3154
gid))
2290
3155
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
2291
3158
if error.errno != errno.EPERM:
2292
raise error
2293
3159
raise
3160
2294
3161
if debug:
2295
3162
# Enable all possible GnuTLS debugging
2296
3163
2297
3164
# "Use a log level over 10 to enable all debugging options."
2298
3165
# - GnuTLS manual
2299
gnutls.library.functions.gnutls_global_set_log_level(11)
2300
2301
@gnutls.library.types.gnutls_log_func
3166
gnutls.global_set_log_level(11)
3167
3168
@gnutls.log_func
2302
3169
def debug_gnutls(level, string):
2303
3170
logger.debug("GnuTLS: %s", string[:-1])
2304
2305
(gnutls.library.functions
2306
.gnutls_global_set_log_function(debug_gnutls))
2307
3171
3172
gnutls.global_set_log_function(debug_gnutls)
3173
2308
3174
# Redirect stdin so all checkers get /dev/null
2309
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2310
3176
os.dup2(null, sys.stdin.fileno())
2311
3177
if null > 2:
2312
3178
os.close(null)
2313
3179
2314
3180
# Need to fork before connecting to D-Bus
2315
if not debug:
3181
if not foreground:
2316
3182
# Close all input and output, do double fork, etc.
2317
3183
daemon()
2318
2319
gobject.threads_init()
2320
3184
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
3188
GLib.threads_init()
3189
2321
3190
global main_loop
2322
3191
# From the Avahi example code
2323
3192
DBusGMainLoop(set_as_default=True)
2324
main_loop = gobject.MainLoop()
3193
main_loop = GLib.MainLoop()
2325
3194
bus = dbus.SystemBus()
2326
3195
# End of Avahi example code
2327
3196
if use_dbus:
2328
3197
try:
2329
3198
bus_name = dbus.service.BusName("se.recompile.Mandos",
2330
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2333
do_not_queue=True))
2334
except dbus.exceptions.NameExistsException as e:
3199
bus,
3200
do_not_queue=True)
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3203
do_not_queue=True)
3204
except dbus.exceptions.DBusException as e:
2335
3205
logger.error("Disabling D-Bus:", exc_info=e)
2336
3206
use_dbus = False
2337
3207
server_settings["use_dbus"] = False
2338
3208
tcp_server.use_dbus = False
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
2344
if server_settings["interface"]:
2345
service.interface = (if_nametoindex
2346
(str(server_settings["interface"])))
2347
3209
if zeroconf:
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3214
protocol=protocol,
3215
bus=bus)
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
3219
2348
3220
global multiprocessing_manager
2349
3221
multiprocessing_manager = multiprocessing.Manager()
2350
3222
2351
3223
client_class = Client
2352
3224
if use_dbus:
2353
client_class = functools.partial(ClientDBus, bus = bus)
2354
3225
client_class = functools.partial(ClientDBus, bus=bus)
3226
2355
3227
client_settings = Client.config_parser(client_config)
2356
3228
old_client_settings = {}
2357
3229
clients_data = {}
2358
3230
3231
# This is used to redirect stdout and stderr for checker processes
3232
global wnull
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3235
# mode
3236
if debug or not foreground:
3237
wnull.close()
3238
2359
3239
# Get client data and settings from last running state.
2360
3240
if server_settings["restore"]:
2361
3241
try:
2362
3242
with open(stored_state_path, "rb") as stored_state:
2363
clients_data, old_client_settings = (pickle.load
2364
(stored_state))
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3245
stored_state)
3246
else:
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3250
# clients_data
3251
# .keys()
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3261
for k, v in
3262
clients_data[key].items()}
3263
clients_data[key] = value
3264
# .client_structure
3265
value["client_structure"] = [
3266
(s.decode("utf-8")
3267
if isinstance(s, bytes)
3268
else s) for s in
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3279
# .keys()
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3283
else key): value
3284
for key, value in
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
3292
.decode("utf-8"))
2365
3293
os.remove(stored_state_path)
2366
3294
except IOError as e:
2367
3295
if e.errno == errno.ENOENT:
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
2370
3298
else:
2371
3299
logger.critical("Could not load persistent state:",
2372
3300
exc_info=e)
2373
3301
raise
2374
3302
except EOFError as e:
2375
3303
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
2377
3304
"EOFError:",
3305
exc_info=e)
3306
2378
3307
with PGPEngine() as pgp:
2379
for client_name, client in clients_data.iteritems():
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
3311
continue
3312
2380
3313
# Decide which value to use after restoring saved state.
2381
3314
# We have three different values: Old config file,
2382
3315
# new config file, and saved state.
2387
3320
# For each value in new config, check if it
2388
3321
# differs from the old config value (Except for
2389
3322
# the "secret" attribute)
2390
if (name != "secret" and
2391
value != old_client_settings[client_name]
2392
[name]):
3323
if (name != "secret"
3324
and (value !=
3325
old_client_settings[client_name][name])):
2393
3326
client[name] = value
2394
3327
except KeyError:
2395
3328
pass
2396
3329
2397
3330
# Clients who has passed its expire date can still be
2398
# enabled if its last checker was successful. Clients
3331
# enabled if its last checker was successful. A Client
2399
3332
# whose checker succeeded before we stored its state is
2400
3333
# assumed to have successfully run all checkers during
2401
3334
# downtime.
2403
3336
if datetime.datetime.utcnow() >= client["expires"]:
2404
3337
if not client["last_checked_ok"]:
2405
3338
logger.warning(
2406
"disabling client {0} - Client never "
2407
"performed a successful checker"
2408
.format(client_name))
3339
"disabling client {} - Client never "
3340
"performed a successful checker".format(
3341
client_name))
2409
3342
client["enabled"] = False
2410
3343
elif client["last_checker_status"] != 0:
2411
3344
logger.warning(
2412
"disabling client {0} - Client "
2413
"last checker failed with error code {1}"
2414
.format(client_name,
2415
client["last_checker_status"]))
3345
"disabling client {} - Client last"
3346
" checker failed with error code"
3347
" {}".format(
3348
client_name,
3349
client["last_checker_status"]))
2416
3350
client["enabled"] = False
2417
3351
else:
2418
client["expires"] = (datetime.datetime
2419
.utcnow()
2420
+ client["timeout"])
3352
client["expires"] = (
3353
datetime.datetime.utcnow()
3354
+ client["timeout"])
2421
3355
logger.debug("Last checker succeeded,"
2422
" keeping {0} enabled"
2423
.format(client_name))
3356
" keeping {} enabled".format(
3357
client_name))
2424
3358
try:
2425
client["secret"] = (
2426
pgp.decrypt(client["encrypted_secret"],
2427
client_settings[client_name]
2428
["secret"]))
3359
client["secret"] = pgp.decrypt(
3360
client["encrypted_secret"],
3361
client_settings[client_name]["secret"])
2429
3362
except PGPError:
2430
3363
# If decryption fails, we use secret from new settings
2431
logger.debug("Failed to decrypt {0} old secret"
2432
.format(client_name))
2433
client["secret"] = (
2434
client_settings[client_name]["secret"])
2435
3364
logger.debug("Failed to decrypt {} old secret".format(
3365
client_name))
3366
client["secret"] = (client_settings[client_name]
3367
["secret"])
3368
2436
3369
# Add/remove clients based on new changes made to config
2437
3370
for client_name in (set(old_client_settings)
2438
3371
- set(client_settings)):
2440
3373
for client_name in (set(client_settings)
2441
3374
- set(old_client_settings)):
2442
3375
clients_data[client_name] = client_settings[client_name]
2443
3376
2444
3377
# Create all client objects
2445
for client_name, client in clients_data.iteritems():
3378
for client_name, client in clients_data.items():
2446
3379
tcp_server.clients[client_name] = client_class(
2447
name = client_name, settings = client)
2448
3380
name=client_name,
3381
settings=client,
3382
server_settings=server_settings)
3383
2449
3384
if not tcp_server.clients:
2450
3385
logger.warning("No clients defined")
2451
2452
if not debug:
2453
try:
2454
with pidfile:
2455
pid = os.getpid()
2456
pidfile.write(str(pid) + "\n".encode("utf-8"))
2457
del pidfile
2458
except IOError:
2459
logger.error("Could not write to file %r with PID %d",
2460
pidfilename, pid)
2461
except NameError:
2462
# "pidfile" was never created
2463
pass
3386
3387
if not foreground:
3388
if pidfile is not None:
3389
pid = os.getpid()
3390
try:
3391
with pidfile:
3392
print(pid, file=pidfile)
3393
except IOError:
3394
logger.error("Could not write to file %r with PID %d",
3395
pidfilename, pid)
3396
del pidfile
2464
3397
del pidfilename
2465
2466
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2468
3398
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
3402
2469
3403
if use_dbus:
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
3404
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2473
3408
"""A D-Bus proxy object"""
3409
2474
3410
def __init__(self):
2475
3411
dbus.service.Object.__init__(self, bus, "/")
3412
2476
3413
_interface = "se.recompile.Mandos"
2477
2478
@dbus_interface_annotations(_interface)
2479
def _foo(self):
2480
return { "org.freedesktop.DBus.Property"
2481
".EmitsChangedSignal":
2482
"false"}
2483
3414
2484
3415
@dbus.service.signal(_interface, signature="o")
2485
3416
def ClientAdded(self, objpath):
2486
3417
"D-Bus signal"
2487
3418
pass
2488
3419
2489
3420
@dbus.service.signal(_interface, signature="ss")
2490
def ClientNotFound(self, fingerprint, address):
3421
def ClientNotFound(self, key_id, address):
2491
3422
"D-Bus signal"
2492
3423
pass
2493
3424
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3426
"true"})
2494
3427
@dbus.service.signal(_interface, signature="os")
2495
3428
def ClientRemoved(self, objpath, name):
2496
3429
"D-Bus signal"
2497
3430
pass
2498
3431
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3433
"true"})
2499
3434
@dbus.service.method(_interface, out_signature="ao")
2500
3435
def GetAllClients(self):
2501
3436
"D-Bus method"
2502
return dbus.Array(c.dbus_object_path
2503
for c in
2504
tcp_server.clients.itervalues())
2505
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3439
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3441
"true"})
2506
3442
@dbus.service.method(_interface,
2507
3443
out_signature="a{oa{sv}}")
2508
3444
def GetAllClientsWithProperties(self):
2509
3445
"D-Bus method"
2510
3446
return dbus.Dictionary(
2511
((c.dbus_object_path, c.GetAll(""))
2512
for c in tcp_server.clients.itervalues()),
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2513
3450
signature="oa{sv}")
2514
3451
2515
3452
@dbus.service.method(_interface, in_signature="o")
2516
3453
def RemoveClient(self, object_path):
2517
3454
"D-Bus method"
2518
for c in tcp_server.clients.itervalues():
3455
for c in tcp_server.clients.values():
2519
3456
if c.dbus_object_path == object_path:
2520
3457
del tcp_server.clients[c.name]
2521
3458
c.remove_from_connection()
2522
# Don't signal anything except ClientRemoved
3459
# Don't signal the disabling
2523
3460
c.disable(quiet=True)
2524
# Emit D-Bus signal
2525
self.ClientRemoved(object_path, c.name)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2526
3463
return
2527
3464
raise KeyError(object_path)
2528
3465
2529
3466
del _interface
2530
3467
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3471
"""D-Bus method"""
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3474
dbus.Dictionary(
3475
{interface: client.GetAll(interface)
3476
for interface in
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3479
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3482
if use_dbus:
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3486
dbus.Dictionary(
3487
{interface: client.GetAll(interface)
3488
for interface in
3489
client._get_all_interface_names()}))
3490
# Old signal
3491
self.ClientAdded(client.dbus_object_path)
3492
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3495
if use_dbus:
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3500
# Old signal
3501
self.ClientRemoved(client.dbus_object_path,
3502
client.name)
3503
2531
3504
mandos_dbus_service = MandosDBusService()
2532
3505
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
3509
wn = wnull
3510
2533
3511
def cleanup():
2534
3512
"Cleanup function; run on exit"
2535
service.cleanup()
2536
2537
multiprocessing.active_children()
3513
if zeroconf:
3514
service.cleanup()
3515
3516
mp.active_children()
3517
wn.close()
2538
3518
if not (tcp_server.clients or client_settings):
2539
3519
return
2540
3520
2541
3521
# Store client before exiting. Secrets are encrypted with key
2542
3522
# based on what config file has. If config file is
2543
3523
# removed/edited, old secret will thus be unrecovable.
2544
3524
clients = {}
2545
3525
with PGPEngine() as pgp:
2546
for client in tcp_server.clients.itervalues():
3526
for client in tcp_server.clients.values():
2547
3527
key = client_settings[client.name]["secret"]
2548
3528
client.encrypted_secret = pgp.encrypt(client.secret,
2549
3529
key)
2550
3530
client_dict = {}
2551
3531
2552
3532
# A list of attributes that can not be pickled
2553
3533
# + secret.
2554
exclude = set(("bus", "changedstate", "secret",
2555
"checker"))
2556
for name, typ in (inspect.getmembers
2557
(dbus.service.Object)):
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
3537
.Object):
2558
3538
exclude.add(name)
2559
3539
2560
3540
client_dict["encrypted_secret"] = (client
2561
3541
.encrypted_secret)
2562
3542
for attr in client.client_structure:
2563
3543
if attr not in exclude:
2564
3544
client_dict[attr] = getattr(client, attr)
2565
3545
2566
3546
clients[client.name] = client_dict
2567
3547
del client_settings[client.name]["secret"]
2568
3548
2569
3549
try:
2570
with (tempfile.NamedTemporaryFile
2571
(mode='wb', suffix=".pickle", prefix='clients-',
2572
dir=os.path.dirname(stored_state_path),
2573
delete=False)) as stored_state:
2574
pickle.dump((clients, client_settings), stored_state)
2575
tempname=stored_state.name
3550
with tempfile.NamedTemporaryFile(
3551
mode='wb',
3552
suffix=".pickle",
3553
prefix='clients-',
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3557
protocol=2)
3558
tempname = stored_state.name
2576
3559
os.rename(tempname, stored_state_path)
2577
3560
except (IOError, OSError) as e:
2578
3561
if not debug:
2581
3564
except NameError:
2582
3565
pass
2583
3566
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2584
logger.warning("Could not save persistent state: {0}"
3567
logger.warning("Could not save persistent state: {}"
2585
3568
.format(os.strerror(e.errno)))
2586
3569
else:
2587
3570
logger.warning("Could not save persistent state:",
2588
3571
exc_info=e)
2589
raise e
2590
3572
raise
3573
2591
3574
# Delete all clients, and settings from config
2592
3575
while tcp_server.clients:
2593
3576
name, client = tcp_server.clients.popitem()
2594
3577
if use_dbus:
2595
3578
client.remove_from_connection()
2596
# Don't signal anything except ClientRemoved
3579
# Don't signal the disabling
2597
3580
client.disable(quiet=True)
3581
# Emit D-Bus signal for removal
2598
3582
if use_dbus:
2599
# Emit D-Bus signal
2600
mandos_dbus_service.ClientRemoved(client
2601
.dbus_object_path,
2602
client.name)
3583
mandos_dbus_service.client_removed_signal(client)
2603
3584
client_settings.clear()
2604
3585
2605
3586
atexit.register(cleanup)
2606
2607
for client in tcp_server.clients.itervalues():
3587
3588
for client in tcp_server.clients.values():
2608
3589
if use_dbus:
2609
# Emit D-Bus signal
2610
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3590
# Emit D-Bus signal for adding
3591
mandos_dbus_service.client_added_signal(client)
2611
3592
# Need to initiate checking of clients
2612
3593
if client.enabled:
2613
3594
client.init_checker()
2614
3595
2615
3596
tcp_server.enable()
2616
3597
tcp_server.server_activate()
2617
3598
2618
3599
# Find out what port we got
2619
service.port = tcp_server.socket.getsockname()[1]
3600
if zeroconf:
3601
service.port = tcp_server.socket.getsockname()[1]
2620
3602
if use_ipv6:
2621
3603
logger.info("Now listening on address %r, port %d,"
2622
3604
" flowinfo %d, scope_id %d",
2624
3606
else: # IPv4
2625
3607
logger.info("Now listening on address %r, port %d",
2626
3608
*tcp_server.socket.getsockname())
2627
2628
#service.interface = tcp_server.socket.getsockname()[3]
2629
3609
3610
# service.interface = tcp_server.socket.getsockname()[3]
3611
2630
3612
try:
2631
# From the Avahi example code
2632
try:
2633
service.activate()
2634
except dbus.exceptions.DBusException as error:
2635
logger.critical("D-Bus Exception", exc_info=error)
2636
cleanup()
2637
sys.exit(1)
2638
# End of Avahi example code
2639
2640
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2641
lambda *args, **kwargs:
2642
(tcp_server.handle_request
2643
(*args[2:], **kwargs) or True))
2644
3613
if zeroconf:
3614
# From the Avahi example code
3615
try:
3616
service.activate()
3617
except dbus.exceptions.DBusException as error:
3618
logger.critical("D-Bus Exception", exc_info=error)
3619
cleanup()
3620
sys.exit(1)
3621
# End of Avahi example code
3622
3623
GLib.io_add_watch(
3624
GLib.IOChannel.unix_new(tcp_server.fileno()),
3625
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3626
lambda *args, **kwargs: (tcp_server.handle_request
3627
(*args[2:], **kwargs) or True))
3628
2645
3629
logger.debug("Starting main loop")
2646
3630
main_loop.run()
2647
3631
except AvahiError as error:
2656
3640
# Must run before the D-Bus bus name gets deregistered
2657
3641
cleanup()
2658
3642
3643
3644
def should_only_run_tests():
3645
parser = argparse.ArgumentParser(add_help=False)
3646
parser.add_argument("--check", action='store_true')
3647
args, unknown_args = parser.parse_known_args()
3648
run_tests = args.check
3649
if run_tests:
3650
# Remove --check argument from sys.argv
3651
sys.argv[1:] = unknown_args
3652
return run_tests
3653
3654
# Add all tests from doctest strings
3655
def load_tests(loader, tests, none):
3656
import doctest
3657
tests.addTests(doctest.DocTestSuite())
3658
return tests
3659
2659
3660
if __name__ == '__main__':
2660
main()
3661
try:
3662
if should_only_run_tests():
3663
# Call using ./mandos --check [--verbose]
3664
unittest.main()
3665
else:
3666
main()
3667
finally:
3668
logging.shutdown()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0