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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
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
import unittest
81
import random
82
import shlex
68
83
69
84
import dbus
70
85
import dbus.service
71
import gobject
72
import avahi
86
import gi
87
from gi.repository import GLib
73
88
from dbus.mainloop.glib import DBusGMainLoop
74
89
import ctypes
75
90
import ctypes.util
76
91
import xml.dom.minidom
77
92
import inspect
78
import GnuPGInterface
79
80
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:
81
122
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
123
except AttributeError:
83
124
try:
125
# This is where SO_BINDTODEVICE was up to and including Python
126
# 2.6, and also 3.2:
84
127
from IN import SO_BINDTODEVICE
85
128
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.5.2"
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"
89
147
stored_state_file = "clients.pickle"
90
148
91
149
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
150
logging.captureWarnings(True) # Show warnings via the logging system
151
syslogger = None
95
152
96
153
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
100
156
except (OSError, AttributeError):
157
101
158
def if_nametoindex(interface):
102
159
"Get an interface index the hard way, i.e. using fcntl()"
103
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
161
with contextlib.closing(socket.socket()) as s:
105
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
165
return interface_index
111
166
112
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
113
184
def initlogger(debug, level=logging.WARNING):
114
185
"""init logger and add loglevel"""
115
186
187
global syslogger
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
190
address="/dev/log"))
116
191
syslogger.setFormatter(logging.Formatter
117
192
('Mandos [%(process)d]: %(levelname)s:'
118
193
' %(message)s'))
119
194
logger.addHandler(syslogger)
120
195
121
196
if debug:
122
197
console = logging.StreamHandler()
123
198
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
133
208
pass
134
209
135
210
136
class PGPEngine(object):
211
class PGPEngine:
137
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
213
138
214
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
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
148
235
def __enter__(self):
149
236
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
237
238
def __exit__(self, exc_type, exc_value, traceback):
152
239
self._cleanup()
153
240
return False
154
241
155
242
def __del__(self):
156
243
self._cleanup()
157
244
158
245
def _cleanup(self):
159
246
if self.tempdir is not None:
160
247
# Delete contents of tempdir
161
248
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
249
topdown=False):
163
250
for filename in files:
164
251
os.remove(os.path.join(root, filename))
165
252
for dirname in dirs:
167
254
# Remove tempdir
168
255
os.rmdir(self.tempdir)
169
256
self.tempdir = None
170
257
171
258
def password_encode(self, password):
172
259
# Passphrase can not be empty and can not contain newlines or
173
260
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
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
176
269
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
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)
191
285
return ciphertext
192
286
193
287
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
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)
208
303
return decrypted_plaintext
209
304
210
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
211
331
212
332
class AvahiError(Exception):
213
333
def __init__(self, value, *args, **kwargs):
214
334
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
335
return super(AvahiError, self).__init__(value, *args,
336
**kwargs)
337
218
338
219
339
class AvahiServiceError(AvahiError):
220
340
pass
221
341
342
222
343
class AvahiGroupError(AvahiError):
223
344
pass
224
345
225
346
226
class AvahiService(object):
347
class AvahiService:
227
348
"""An Avahi (Zeroconf) service.
228
349
229
350
Attributes:
230
351
interface: integer; avahi.IF_UNSPEC or an interface index.
231
352
Used to optionally bind to the specified interface.
232
353
name: string; Example: 'Mandos'
233
354
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
355
See <https://www.iana.org/assignments/service-names-port-numbers>
235
356
port: integer; what port to announce
236
357
TXT: list of strings; TXT record for the service
237
358
domain: string; Domain to publish on, default to .local if empty.
243
364
server: D-Bus Server
244
365
bus: dbus.SystemBus()
245
366
"""
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
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):
250
379
self.interface = interface
251
380
self.name = name
252
381
self.type = servicetype
261
390
self.server = None
262
391
self.bus = bus
263
392
self.entry_group_state_changed_match = None
264
def rename(self):
393
394
def rename(self, remove=True):
265
395
"""Derived from the Avahi example code"""
266
396
if self.rename_count >= self.max_renames:
267
397
logger.critical("No suitable Zeroconf service name found"
268
398
" after %i retries, exiting.",
269
399
self.rename_count)
270
400
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
401
self.name = str(
402
self.server.GetAlternativeServiceName(self.name))
403
self.rename_count += 1
273
404
logger.info("Changing Zeroconf service name to %r ...",
274
405
self.name)
275
self.remove()
406
if remove:
407
self.remove()
276
408
try:
277
409
self.add()
278
410
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
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
283
420
def remove(self):
284
421
"""Derived from the Avahi example code"""
285
422
if self.entry_group_state_changed_match is not None:
287
424
self.entry_group_state_changed_match = None
288
425
if self.group is not None:
289
426
self.group.Reset()
427
290
428
def add(self):
291
429
"""Derived from the Avahi example code"""
292
430
self.remove()
309
447
dbus.UInt16(self.port),
310
448
avahi.string_array_to_txt_array(self.TXT))
311
449
self.group.Commit()
450
312
451
def entry_group_state_changed(self, state, error):
313
452
"""Derived from the Avahi example code"""
314
453
logger.debug("Avahi entry group state change: %i", state)
315
454
316
455
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
456
logger.debug("Zeroconf service established.")
318
457
elif state == avahi.ENTRY_GROUP_COLLISION:
320
459
self.rename()
321
460
elif state == avahi.ENTRY_GROUP_FAILURE:
322
461
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
462
str(error))
463
raise AvahiGroupError("State changed: {!s}".format(error))
464
326
465
def cleanup(self):
327
466
"""Derived from the Avahi example code"""
328
467
if self.group is not None:
333
472
pass
334
473
self.group = None
335
474
self.remove()
475
336
476
def server_state_changed(self, state, error=None):
337
477
"""Derived from the Avahi example code"""
338
478
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"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
}
346
485
if state in bad_states:
347
486
if bad_states[state] is not None:
348
487
if error is None:
351
490
logger.error(bad_states[state] + ": %r", error)
352
491
self.cleanup()
353
492
elif state == avahi.SERVER_RUNNING:
354
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)
355
505
else:
356
506
if error is None:
357
507
logger.debug("Unknown state: %r", state)
358
508
else:
359
509
logger.debug("Unknown state: %r: %r", state, error)
510
360
511
def activate(self):
361
512
"""Derived from the Avahi example code"""
362
513
if self.server is None:
366
517
follow_name_owner_changes=True),
367
518
avahi.DBUS_INTERFACE_SERVER)
368
519
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
520
self.server_state_changed)
370
521
self.server_state_changed(self.server.GetState())
371
522
523
372
524
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
525
def rename(self, *args, **kwargs):
374
526
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% 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)))
380
531
return ret
381
532
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
388
class Client(object):
533
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:
389
847
"""A representation of a client host served by this server.
390
848
391
849
Attributes:
392
850
approved: bool(); 'None' if not yet approved/disapproved
393
851
approval_delay: datetime.timedelta(); Time to wait for approval
394
852
approval_duration: datetime.timedelta(); Duration of one approval
395
checker: subprocess.Popen(); a running checker process used
396
to see if the client lives.
397
'None' if no process is running.
398
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
399
857
checker_command: string; External command which is run to check
400
858
if client lives. %() expansions are done at
401
859
runtime with vars(self) as dict, so that for
402
860
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
861
checker_initiator_tag: a GLib event source tag, or None
404
862
created: datetime.datetime(); (UTC) object creation
405
863
client_structure: Object describing what attributes a client has
406
864
and is used for storing the client at exit
407
865
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
866
disable_initiator_tag: a GLib event source tag, or None
409
867
enabled: bool()
410
868
fingerprint: string (40 or 32 hexadecimal digits); used to
411
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
412
872
host: string; available for use by the checker command
413
873
interval: datetime.timedelta(); How often to start a new checker
414
874
last_approval_request: datetime.datetime(); (UTC) or None
416
876
last_checker_status: integer between 0 and 255 reflecting exit
417
877
status of last checker. -1 reflects crashed
418
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
419
881
last_enabled: datetime.datetime(); (UTC) or None
420
882
name: string; from the config file, used in log messages and
421
883
D-Bus identifiers
426
888
runtime_expansions: Allowed attributes for runtime expansion.
427
889
expires: datetime.datetime(); time (UTC) when a client will be
428
890
disabled, or None
891
server_settings: The server_settings dict from main()
429
892
"""
430
893
431
894
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
895
"created", "enabled", "expires", "key_id",
896
"fingerprint", "host", "interval",
897
"last_approval_request", "last_checked_ok",
434
898
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
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
}
460
910
461
911
@staticmethod
462
912
def config_parser(config):
470
920
for client_name in config.sections():
471
921
section = dict(config.items(client_name))
472
922
client = settings[client_name] = {}
473
923
474
924
client["host"] = section["host"]
475
925
# Reformat values from string types to Python types
476
926
client["approved_by_default"] = config.getboolean(
477
927
client_name, "approved_by_default")
478
928
client["enabled"] = config.getboolean(client_name,
479
929
"enabled")
480
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(" ", ""))
481
936
client["fingerprint"] = (section["fingerprint"].upper()
482
937
.replace(" ", ""))
483
938
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
939
client["secret"] = codecs.decode(section["secret"]
940
.encode("utf-8"),
941
"base64")
485
942
elif "secfile" in section:
486
943
with open(os.path.expanduser(os.path.expandvars
487
944
(section["secfile"])),
488
945
"rb") as secfile:
489
946
client["secret"] = secfile.read()
490
947
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
948
raise TypeError("No secret or secfile for section {}"
949
.format(section))
493
950
client["timeout"] = string_to_delta(section["timeout"])
494
951
client["extended_timeout"] = string_to_delta(
495
952
section["extended_timeout"])
502
959
client["last_approval_request"] = None
503
960
client["last_checked_ok"] = None
504
961
client["last_checker_status"] = -2
505
962
506
963
return settings
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
964
965
def __init__(self, settings, name=None, server_settings=None):
513
966
self.name = name
967
if server_settings is None:
968
server_settings = {}
969
self.server_settings = server_settings
514
970
# adding all client settings
515
for setting, value in settings.iteritems():
971
for setting, value in settings.items():
516
972
setattr(self, setting, value)
517
973
518
974
if self.enabled:
519
975
if not hasattr(self, "last_enabled"):
520
976
self.last_enabled = datetime.datetime.utcnow()
524
980
else:
525
981
self.last_enabled = None
526
982
self.expires = None
527
983
528
984
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
985
logger.debug(" Key ID: %s", self.key_id)
532
986
logger.debug(" Fingerprint: %s", self.fingerprint)
533
987
self.created = settings.get("created",
534
988
datetime.datetime.utcnow())
541
995
self.current_checker_command = None
542
996
self.approved = None
543
997
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
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()
549
1002
if not attr.startswith("_")]
550
1003
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
1004
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
556
1007
if not name.startswith("_"):
557
1008
self.client_structure.append(name)
558
1009
559
1010
# Send notice to process children that client state has changed
560
1011
def send_changedstate(self):
561
1012
with self.changedstate:
562
1013
self.changedstate.notify_all()
563
1014
564
1015
def enable(self):
565
1016
"""Start this client's checker and timeout hooks"""
566
1017
if getattr(self, "enabled", False):
567
1018
# Already enabled
568
1019
return
569
self.send_changedstate()
570
1020
self.expires = datetime.datetime.utcnow() + self.timeout
571
1021
self.enabled = True
572
1022
self.last_enabled = datetime.datetime.utcnow()
573
1023
self.init_checker()
574
1024
self.send_changedstate()
1025
575
1026
def disable(self, quiet=True):
576
1027
"""Disable this client."""
577
1028
if not getattr(self, "enabled", False):
578
1029
return False
579
1030
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
1031
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
1032
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
585
1034
self.disable_initiator_tag = None
586
1035
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
1036
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
589
1038
self.checker_initiator_tag = None
590
1039
self.stop_checker()
591
1040
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
1041
if not quiet:
1042
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
593
1044
return False
594
1045
595
1046
def __del__(self):
596
1047
self.disable()
597
1048
598
1049
def init_checker(self):
599
1050
# Schedule a new checker to be started an 'interval' from now,
600
1051
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
1052
if self.checker_initiator_tag is not None:
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)
604
1058
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
1059
if self.disable_initiator_tag is not None:
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)
608
1063
# Also start a new checker *right now*.
609
1064
self.start_checker()
610
611
def checker_callback(self, pid, condition, command):
1065
1066
def checker_callback(self, source, condition, connection,
1067
command):
612
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()
613
1074
self.checker_callback_tag = None
614
1075
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
1076
1077
if returncode >= 0:
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
617
1080
if self.last_checker_status == 0:
618
1081
logger.info("Checker for %(name)s succeeded",
619
1082
vars(self))
620
1083
self.checked_ok()
621
1084
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
1085
logger.info("Checker for %(name)s failed", vars(self))
624
1086
else:
625
1087
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
626
1089
logger.warning("Checker for %(name)s crashed?",
627
1090
vars(self))
628
1091
return False
1092
629
1093
def checked_ok(self):
630
1094
"""Assert that the client has been seen, alive and well."""
631
1095
self.last_checked_ok = datetime.datetime.utcnow()
632
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
633
1098
self.bump_timeout()
634
1099
635
1100
def bump_timeout(self, timeout=None):
636
1101
"""Bump up the timeout for this client."""
637
1102
if timeout is None:
638
1103
timeout = self.timeout
639
1104
if self.disable_initiator_tag is not None:
640
gobject.source_remove(self.disable_initiator_tag)
1105
GLib.source_remove(self.disable_initiator_tag)
1106
self.disable_initiator_tag = None
641
1107
if getattr(self, "enabled", False):
642
self.disable_initiator_tag = (gobject.timeout_add
643
(timedelta_to_milliseconds
644
(timeout), self.disable))
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
645
1110
self.expires = datetime.datetime.utcnow() + timeout
646
1111
647
1112
def need_approval(self):
648
1113
self.last_approval_request = datetime.datetime.utcnow()
649
1114
650
1115
def start_checker(self):
651
1116
"""Start a new checker subprocess if one is not running.
652
1117
653
1118
If a checker already exists, leave it running and do
654
1119
nothing."""
655
1120
# The reason for not killing a running checker is that if we
656
# did that, then if a checker (for some reason) started
657
# running slowly and taking more than 'interval' time, the
658
# client would inevitably timeout, since no checker would get
659
# a chance to run to completion. If we instead leave running
1121
# did that, and if a checker (for some reason) started running
1122
# slowly and taking more than 'interval' time, then the client
1123
# would inevitably timeout, since no checker would get a
1124
# chance to run to completion. If we instead leave running
660
1125
# checkers alone, the checker would have to take more time
661
1126
# than 'timeout' for the client to be disabled, which is as it
662
1127
# should be.
663
664
# If a checker exists, make sure it is not a zombie
665
try:
666
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
667
except (AttributeError, OSError) as error:
668
if (isinstance(error, OSError)
669
and error.errno != errno.ECHILD):
670
raise error
671
else:
672
if pid:
673
logger.warning("Checker was a zombie")
674
gobject.source_remove(self.checker_callback_tag)
675
self.checker_callback(pid, status,
676
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
677
1133
# Start a new checker if needed
678
1134
if self.checker is None:
1135
# Escape attributes for the shell
1136
escaped_attrs = {
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
679
1139
try:
680
# In case checker_command has exactly one % operator
681
command = self.checker_command % self.host
682
except TypeError:
683
# Escape attributes for the shell
684
escaped_attrs = dict(
685
(attr,
686
re.escape(unicode(str(getattr(self, attr, "")),
687
errors=
688
'replace')))
689
for attr in
690
self.runtime_expansions)
691
692
try:
693
command = self.checker_command % escaped_attrs
694
except TypeError as error:
695
logger.error('Could not format string "%s":'
696
' %s', self.checker_command, error)
697
return True # Try again later
1140
command = self.checker_command % escaped_attrs
1141
except TypeError as error:
1142
logger.error('Could not format string "%s"',
1143
self.checker_command,
1144
exc_info=error)
1145
return True # Try again later
698
1146
self.current_checker_command = command
699
try:
700
logger.info("Starting checker %r for %s",
701
command, self.name)
702
# We don't need to redirect stdout and stderr, since
703
# in normal mode, that is already done by daemon(),
704
# and in debug mode we don't want to. (Stdin is
705
# always replaced by /dev/null.)
706
self.checker = subprocess.Popen(command,
707
close_fds=True,
708
shell=True, cwd="/")
709
self.checker_callback_tag = (gobject.child_watch_add
710
(self.checker.pid,
711
self.checker_callback,
712
data=command))
713
# The checker may have completed before the gobject
714
# watch was added. Check for this.
715
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
716
if pid:
717
gobject.source_remove(self.checker_callback_tag)
718
self.checker_callback(pid, status, command)
719
except OSError as error:
720
logger.error("Failed to start subprocess: %s",
721
error)
722
# 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
723
1174
return True
724
1175
725
1176
def stop_checker(self):
726
1177
"""Force the checker process, if any, to stop."""
727
1178
if self.checker_callback_tag:
728
gobject.source_remove(self.checker_callback_tag)
1179
GLib.source_remove(self.checker_callback_tag)
729
1180
self.checker_callback_tag = None
730
1181
if getattr(self, "checker", None) is None:
731
1182
return
732
1183
logger.debug("Stopping checker for %(name)s", vars(self))
733
try:
734
os.kill(self.checker.pid, signal.SIGTERM)
735
#time.sleep(0.5)
736
#if self.checker.poll() is None:
737
# os.kill(self.checker.pid, signal.SIGKILL)
738
except OSError as error:
739
if error.errno != errno.ESRCH: # No such process
740
raise
1184
self.checker.terminate()
741
1185
self.checker = None
742
1186
743
1187
744
def dbus_service_property(dbus_interface, signature="v",
745
access="readwrite", byte_arrays=False):
1188
def dbus_service_property(dbus_interface,
1189
signature="v",
1190
access="readwrite",
1191
byte_arrays=False):
746
1192
"""Decorators for marking methods of a DBusObjectWithProperties to
747
1193
become properties on the D-Bus.
748
1194
749
1195
The decorated method will be called with no arguments by "Get"
750
1196
and with one argument by "Set".
751
1197
752
1198
The parameters, where they are supported, are the same as
753
1199
dbus.service.method, except there is only "signature", since the
754
1200
type from Get() and the type sent to Set() is the same.
757
1203
# "Set" method, so we fail early here:
758
1204
if byte_arrays and signature != "ay":
759
1205
raise ValueError("Byte arrays not supported for non-'ay'"
760
" signature %r" % signature)
1206
" signature {!r}".format(signature))
1207
761
1208
def decorator(func):
762
1209
func._dbus_is_property = True
763
1210
func._dbus_interface = dbus_interface
766
1213
func._dbus_name = func.__name__
767
1214
if func._dbus_name.endswith("_dbus_property"):
768
1215
func._dbus_name = func._dbus_name[:-14]
769
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
770
return func
1216
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1217
return func
1218
1219
return decorator
1220
1221
1222
def dbus_interface_annotations(dbus_interface):
1223
"""Decorator for marking functions returning interface annotations
1224
1225
Usage:
1226
1227
@dbus_interface_annotations("org.example.Interface")
1228
def _foo(self): # Function name does not matter
1229
return {"org.freedesktop.DBus.Deprecated": "true",
1230
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1231
"false"}
1232
"""
1233
1234
def decorator(func):
1235
func._dbus_is_interface = True
1236
func._dbus_interface = dbus_interface
1237
func._dbus_name = dbus_interface
1238
return func
1239
1240
return decorator
1241
1242
1243
def dbus_annotations(annotations):
1244
"""Decorator to annotate D-Bus methods, signals or properties
1245
Usage:
1246
1247
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1248
"org.freedesktop.DBus.Property."
1249
"EmitsChangedSignal": "false"})
1250
@dbus_service_property("org.example.Interface", signature="b",
1251
access="r")
1252
def Property_dbus_property(self):
1253
return dbus.Boolean(False)
1254
1255
See also the DBusObjectWithAnnotations class.
1256
"""
1257
1258
def decorator(func):
1259
func._dbus_annotations = annotations
1260
return func
1261
771
1262
return decorator
772
1263
773
1264
774
1265
class DBusPropertyException(dbus.exceptions.DBusException):
775
1266
"""A base class for D-Bus property-related exceptions
776
1267
"""
777
def __unicode__(self):
778
return unicode(str(self))
1268
pass
779
1269
780
1270
781
1271
class DBusPropertyAccessException(DBusPropertyException):
790
1280
pass
791
1281
792
1282
793
class DBusObjectWithProperties(dbus.service.Object):
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.
1288
"""
1289
1290
@staticmethod
1291
def _is_dbus_thing(thing):
1292
"""Returns a function testing if an attribute is a D-Bus thing
1293
1294
If called like _is_dbus_thing("method") it returns a function
1295
suitable for use as predicate to inspect.getmembers().
1296
"""
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1298
False)
1299
1300
def _get_all_dbus_things(self, thing):
1301
"""Returns a generator of (name, attribute) pairs
1302
"""
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
1304
athing.__get__(self))
1305
for cls in self.__class__.__mro__
1306
for name, athing in
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):
794
1373
"""A D-Bus object with properties.
795
1374
796
1375
Classes inheriting from this can use the dbus_service_property
797
1376
decorator to expose methods as D-Bus properties. It exposes the
798
1377
standard Get(), Set(), and GetAll() methods on the D-Bus.
799
1378
"""
800
801
@staticmethod
802
def _is_dbus_property(obj):
803
return getattr(obj, "_dbus_is_property", False)
804
805
def _get_all_dbus_properties(self):
806
"""Returns a generator of (name, attribute) pairs
807
"""
808
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
809
for cls in self.__class__.__mro__
810
for name, prop in
811
inspect.getmembers(cls, self._is_dbus_property))
812
1379
813
1380
def _get_dbus_property(self, interface_name, property_name):
814
1381
"""Returns a bound method if one exists which is a D-Bus
815
1382
property with the specified name and interface.
816
1383
"""
817
for cls in self.__class__.__mro__:
818
for name, value in (inspect.getmembers
819
(cls, self._is_dbus_property)):
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
820
1387
if (value._dbus_name == property_name
821
1388
and value._dbus_interface == interface_name):
822
1389
return value.__get__(self)
823
1390
824
1391
# No such property
825
raise DBusPropertyNotFound(self.dbus_object_path + ":"
826
+ interface_name + "."
827
+ property_name)
828
829
@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",
830
1406
out_signature="v")
831
1407
def Get(self, interface_name, property_name):
832
1408
"""Standard D-Bus property Get() method, see D-Bus standard.
838
1414
if not hasattr(value, "variant_level"):
839
1415
return value
840
1416
return type(value)(value, variant_level=value.variant_level+1)
841
1417
842
1418
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
843
1419
def Set(self, interface_name, property_name, value):
844
1420
"""Standard D-Bus property Set() method, see D-Bus standard.
850
1426
# The byte_arrays option is not supported yet on
851
1427
# signatures other than "ay".
852
1428
if prop._dbus_signature != "ay":
853
raise ValueError
854
value = dbus.ByteArray(b''.join(chr(byte)
855
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))
856
1433
prop(value)
857
858
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1434
1435
@dbus.service.method(dbus.PROPERTIES_IFACE,
1436
in_signature="s",
859
1437
out_signature="a{sv}")
860
1438
def GetAll(self, interface_name):
861
1439
"""Standard D-Bus property GetAll() method, see D-Bus
862
1440
standard.
863
1441
864
1442
Note: Will not include properties with access="write".
865
1443
"""
866
1444
properties = {}
867
for name, prop in self._get_all_dbus_properties():
1445
for name, prop in self._get_all_dbus_things("property"):
868
1446
if (interface_name
869
1447
and interface_name != prop._dbus_interface):
870
1448
# Interface non-empty but did not match
876
1454
if not hasattr(value, "variant_level"):
877
1455
properties[name] = value
878
1456
continue
879
properties[name] = type(value)(value, variant_level=
880
value.variant_level+1)
1457
properties[name] = type(value)(
1458
value, variant_level=value.variant_level + 1)
881
1459
return dbus.Dictionary(properties, signature="sv")
882
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
883
1469
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
884
1470
out_signature="s",
885
1471
path_keyword='object_path',
886
1472
connection_keyword='connection')
887
1473
def Introspect(self, object_path, connection):
888
"""Standard D-Bus method, overloaded to insert property tags.
1474
"""Overloading of standard D-Bus method.
1475
1476
Inserts property tags and interface annotation tags.
889
1477
"""
890
xmlstring = dbus.service.Object.Introspect(self, object_path,
891
connection)
1478
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1479
object_path,
1480
connection)
892
1481
try:
893
1482
document = xml.dom.minidom.parseString(xmlstring)
1483
894
1484
def make_tag(document, name, prop):
895
1485
e = document.createElement("property")
896
1486
e.setAttribute("name", name)
897
1487
e.setAttribute("type", prop._dbus_signature)
898
1488
e.setAttribute("access", prop._dbus_access)
899
1489
return e
1490
900
1491
for if_tag in document.getElementsByTagName("interface"):
1492
# Add property tags
901
1493
for tag in (make_tag(document, name, prop)
902
1494
for name, prop
903
in self._get_all_dbus_properties()
1495
in self._get_all_dbus_things("property")
904
1496
if prop._dbus_interface
905
1497
== if_tag.getAttribute("name")):
906
1498
if_tag.appendChild(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)
907
1515
# Add the names to the return values for the
908
1516
# "org.freedesktop.DBus.Properties" methods
909
1517
if (if_tag.getAttribute("name")
924
1532
except (AttributeError, xml.dom.DOMException,
925
1533
xml.parsers.expat.ExpatError) as error:
926
1534
logger.error("Failed to override Introspection method",
927
error)
928
return xmlstring
929
930
931
def datetime_to_dbus (dt, variant_level=0):
1535
exc_info=error)
1536
return xmlstring
1537
1538
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):
932
1611
"""Convert a UTC datetime.datetime() to a D-Bus type."""
933
1612
if dt is None:
934
return dbus.String("", variant_level = variant_level)
935
return dbus.String(dt.isoformat(),
936
variant_level=variant_level)
937
938
939
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
.__metaclass__):
941
"""Applied to an empty subclass of a D-Bus object, this metaclass
942
will add additional D-Bus attributes matching a certain pattern.
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1615
1616
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1618
"""A class decorator; applied to a subclass of
1619
dbus.service.Object, it will add alternate D-Bus attributes with
1620
interface names according to the "alt_interface_names" mapping.
1621
Usage:
1622
1623
@alternate_dbus_interfaces({"org.example.Interface":
1624
"net.example.AlternateInterface"})
1625
class SampleDBusObject(dbus.service.Object):
1626
@dbus.service.method("org.example.Interface")
1627
def SampleDBusMethod():
1628
pass
1629
1630
The above "SampleDBusMethod" on "SampleDBusObject" will be
1631
reachable via two interfaces: "org.example.Interface" and
1632
"net.example.AlternateInterface", the latter of which will have
1633
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1634
"true", unless "deprecate" is passed with a False value.
1635
1636
This works for methods and signals, and also for D-Bus properties
1637
(from DBusObjectWithProperties) and interfaces (from the
1638
dbus_interface_annotations decorator).
943
1639
"""
944
def __new__(mcs, name, bases, attr):
945
# Go through all the base classes which could have D-Bus
946
# methods, signals, or properties in them
947
for base in (b for b in bases
948
if issubclass(b, dbus.service.Object)):
949
# Go though all attributes of the base class
950
for attrname, attribute in inspect.getmembers(base):
1640
1641
def wrapper(cls):
1642
for orig_interface_name, alt_interface_name in (
1643
alt_interface_names.items()):
1644
attr = {}
1645
interface_names = set()
1646
# Go though all attributes of the class
1647
for attrname, attribute in inspect.getmembers(cls):
951
1648
# Ignore non-D-Bus attributes, and D-Bus attributes
952
1649
# with the wrong interface name
953
1650
if (not hasattr(attribute, "_dbus_interface")
954
or not attribute._dbus_interface
955
.startswith("se.recompile.Mandos")):
1651
or not attribute._dbus_interface.startswith(
1652
orig_interface_name)):
956
1653
continue
957
1654
# Create an alternate D-Bus interface name based on
958
1655
# the current name
959
alt_interface = (attribute._dbus_interface
960
.replace("se.recompile.Mandos",
961
"se.bsnet.fukt.Mandos"))
1656
alt_interface = attribute._dbus_interface.replace(
1657
orig_interface_name, alt_interface_name)
1658
interface_names.add(alt_interface)
962
1659
# Is this a D-Bus signal?
963
1660
if getattr(attribute, "_dbus_is_signal", False):
964
# Extract the original non-method function by
965
# black magic
966
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(
967
1665
zip(attribute.func_code.co_freevars,
968
attribute.__closure__))["func"]
969
.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)
970
1673
# Create a new, but exactly alike, function
971
1674
# object, and decorate it to be a new D-Bus signal
972
1675
# with the alternate D-Bus interface name
973
new_function = (dbus.service.signal
974
(alt_interface,
975
attribute._dbus_signature)
976
(types.FunctionType(
977
nonmethod_func.func_code,
978
nonmethod_func.func_globals,
979
nonmethod_func.func_name,
980
nonmethod_func.func_defaults,
981
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))
1680
# Copy annotations, if any
1681
try:
1682
new_function._dbus_annotations = dict(
1683
attribute._dbus_annotations)
1684
except AttributeError:
1685
pass
1686
982
1687
# Define a creator of a function to call both the
983
# old and new functions, so both the old and new
984
# signals gets sent when the function is called
1688
# original and alternate functions, so both the
1689
# original and alternate signals gets sent when
1690
# the function is called
985
1691
def fixscope(func1, func2):
986
1692
"""This function is a scope container to pass
987
1693
func1 and func2 to the "call_both" function
988
1694
outside of its arguments"""
1695
1696
@functools.wraps(func2)
989
1697
def call_both(*args, **kwargs):
990
1698
"""This function will emit two D-Bus
991
1699
signals by calling func1 and func2"""
992
1700
func1(*args, **kwargs)
993
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
994
1708
return call_both
995
1709
# Create the "call_both" function and add it to
996
1710
# the class
997
attr[attrname] = fixscope(attribute,
998
new_function)
1711
attr[attrname] = fixscope(attribute, new_function)
999
1712
# Is this a D-Bus method?
1000
1713
elif getattr(attribute, "_dbus_is_method", False):
1001
1714
# Create a new, but exactly alike, function
1002
1715
# object. Decorate it to be a new D-Bus method
1003
1716
# with the alternate D-Bus interface name. Add it
1004
1717
# to the class.
1005
attr[attrname] = (dbus.service.method
1006
(alt_interface,
1007
attribute._dbus_in_signature,
1008
attribute._dbus_out_signature)
1009
(types.FunctionType
1010
(attribute.func_code,
1011
attribute.func_globals,
1012
attribute.func_name,
1013
attribute.func_defaults,
1014
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)))
1724
# Copy annotations, if any
1725
try:
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
1729
pass
1015
1730
# Is this a D-Bus property?
1016
1731
elif getattr(attribute, "_dbus_is_property", False):
1017
1732
# Create a new, but exactly alike, function
1018
1733
# object, and decorate it to be a new D-Bus
1019
1734
# property with the alternate D-Bus interface
1020
1735
# name. Add it to the class.
1021
attr[attrname] = (dbus_service_property
1022
(alt_interface,
1023
attribute._dbus_signature,
1024
attribute._dbus_access,
1025
attribute
1026
._dbus_get_args_options
1027
["byte_arrays"])
1028
(types.FunctionType
1029
(attribute.func_code,
1030
attribute.func_globals,
1031
attribute.func_name,
1032
attribute.func_defaults,
1033
attribute.func_closure)))
1034
return type.__new__(mcs, name, bases, attr)
1035
1036
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)))
1742
# Copy annotations, if any
1743
try:
1744
attr[attrname]._dbus_annotations = dict(
1745
attribute._dbus_annotations)
1746
except AttributeError:
1747
pass
1748
# Is this a D-Bus interface?
1749
elif getattr(attribute, "_dbus_is_interface", False):
1750
# Create a new, but exactly alike, function
1751
# object. Decorate it to be a new D-Bus interface
1752
# with the alternate D-Bus interface name. Add it
1753
# to the class.
1754
attr[attrname] = (
1755
dbus_interface_annotations(alt_interface)
1756
(copy_function(attribute)))
1757
if deprecate:
1758
# Deprecate all alternate interfaces
1759
iname = "_AlternateDBusNames_interface_annotation{}"
1760
for interface_name in interface_names:
1761
1762
@dbus_interface_annotations(interface_name)
1763
def func(self):
1764
return {"org.freedesktop.DBus.Deprecated":
1765
"true"}
1766
# Find an unused name
1767
for aname in (iname.format(i)
1768
for i in itertools.count()):
1769
if aname not in attr:
1770
attr[aname] = func
1771
break
1772
if interface_names:
1773
# Replace the class with a new subclass of it with
1774
# methods, signals, etc. as created above.
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)
1781
return cls
1782
1783
return wrapper
1784
1785
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1787
"se.bsnet.fukt.Mandos"})
1037
1788
class ClientDBus(Client, DBusObjectWithProperties):
1038
1789
"""A Client class using D-Bus
1039
1790
1040
1791
Attributes:
1041
1792
dbus_object_path: dbus.ObjectPath
1042
1793
bus: dbus.SystemBus()
1043
1794
"""
1044
1795
1045
1796
runtime_expansions = (Client.runtime_expansions
1046
+ ("dbus_object_path",))
1047
1797
+ ("dbus_object_path", ))
1798
1799
_interface = "se.recompile.Mandos.Client"
1800
1048
1801
# dbus.service.Object doesn't use super(), so we can't either.
1049
1050
def __init__(self, bus = None, *args, **kwargs):
1802
1803
def __init__(self, bus=None, *args, **kwargs):
1051
1804
self.bus = bus
1052
1805
Client.__init__(self, *args, **kwargs)
1053
1806
# Only now, when this client is initialized, can it show up on
1054
1807
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1808
client_object_name = str(self.name).translate(
1056
1809
{ord("."): ord("_"),
1057
1810
ord("-"): ord("_")})
1058
self.dbus_object_path = (dbus.ObjectPath
1059
("/clients/" + client_object_name))
1811
self.dbus_object_path = dbus.ObjectPath(
1812
"/clients/" + client_object_name)
1060
1813
DBusObjectWithProperties.__init__(self, self.bus,
1061
1814
self.dbus_object_path)
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
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):
1066
1821
""" Modify a variable so that it's a property which announces
1067
1822
its changes to DBus.
1068
1823
1069
1824
transform_fun: Function that takes a value and a variant_level
1070
1825
and transforms it to a D-Bus type.
1071
1826
dbus_name: D-Bus name of the variable
1073
1828
to the D-Bus. Default: no transform
1074
1829
variant_level: D-Bus variant level. Default: 1
1075
1830
"""
1076
attrname = "_{0}".format(dbus_name)
1831
attrname = "_{}".format(dbus_name)
1832
1077
1833
def setter(self, value):
1078
1834
if hasattr(self, "dbus_object_path"):
1079
1835
if (not hasattr(self, attrname) or
1080
1836
type_func(getattr(self, attrname, None))
1081
1837
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
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())
1087
1853
setattr(self, attrname, value)
1088
1854
1089
1855
return property(lambda self: getattr(self, attrname), setter)
1090
1091
1856
1092
1857
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
1858
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
1859
"ApprovalPending",
1095
type_func = bool)
1860
type_func=bool)
1096
1861
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
1862
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
1863
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1864
checker = notifychangeproperty(
1865
dbus.Boolean, "CheckerRunning",
1866
type_func=lambda checker: checker is not None)
1102
1867
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
1868
"LastCheckedOK")
1104
1869
last_checker_status = notifychangeproperty(dbus.Int16,
1107
1872
datetime_to_dbus, "LastApprovalRequest")
1108
1873
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
1874
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1875
approval_delay = notifychangeproperty(
1876
dbus.UInt64, "ApprovalDelay",
1877
type_func=lambda td: td.total_seconds() * 1000)
1114
1878
approval_duration = notifychangeproperty(
1115
1879
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1880
type_func=lambda td: td.total_seconds() * 1000)
1117
1881
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1882
timeout = notifychangeproperty(
1883
dbus.UInt64, "Timeout",
1884
type_func=lambda td: td.total_seconds() * 1000)
1121
1885
extended_timeout = notifychangeproperty(
1122
1886
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
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)
1128
1891
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1892
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1893
invalidate_only=True)
1894
1130
1895
del notifychangeproperty
1131
1896
1132
1897
def __del__(self, *args, **kwargs):
1133
1898
try:
1134
1899
self.remove_from_connection()
1137
1902
if hasattr(DBusObjectWithProperties, "__del__"):
1138
1903
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
1904
Client.__del__(self, *args, **kwargs)
1140
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
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:
1147
1913
# Emit D-Bus signal
1148
1914
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1915
# This is specific to GNU libC
1916
dbus.Int64(exitstatus << 8),
1150
1917
dbus.String(command))
1151
1918
else:
1152
1919
# Emit D-Bus signal
1153
1920
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1921
dbus.Int64(
1922
# This is specific to GNU libC
1923
(exitstatus << 8)
1924
| self.last_checker_signal),
1155
1925
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1159
1926
return ret
1927
1160
1928
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1929
old_checker_pid = getattr(self.checker, "pid", None)
1166
1930
r = Client.start_checker(self, *args, **kwargs)
1167
1931
# Only if new checker process was started
1168
1932
if (self.checker is not None
1170
1934
# Emit D-Bus signal
1171
1935
self.CheckerStarted(self.current_checker_command)
1172
1936
return r
1173
1937
1174
1938
def _reset_approved(self):
1175
1939
self.approved = None
1176
1940
return False
1177
1941
1178
1942
def approve(self, value=True):
1179
self.send_changedstate()
1180
1943
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
1190
1944
GLib.timeout_add(int(self.approval_duration.total_seconds()
1945
* 1000), self._reset_approved)
1946
self.send_changedstate()
1947
1948
# D-Bus methods, signals & properties
1949
1950
# Interfaces
1951
1952
# Signals
1953
1191
1954
# CheckerCompleted - signal
1192
1955
@dbus.service.signal(_interface, signature="nxs")
1193
1956
def CheckerCompleted(self, exitcode, waitstatus, command):
1194
1957
"D-Bus signal"
1195
1958
pass
1196
1959
1197
1960
# CheckerStarted - signal
1198
1961
@dbus.service.signal(_interface, signature="s")
1199
1962
def CheckerStarted(self, command):
1200
1963
"D-Bus signal"
1201
1964
pass
1202
1965
1203
1966
# PropertyChanged - signal
1967
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1204
1968
@dbus.service.signal(_interface, signature="sv")
1205
1969
def PropertyChanged(self, property, value):
1206
1970
"D-Bus signal"
1207
1971
pass
1208
1972
1209
1973
# GotSecret - signal
1210
1974
@dbus.service.signal(_interface)
1211
1975
def GotSecret(self):
1214
1978
server to mandos-client
1215
1979
"""
1216
1980
pass
1217
1981
1218
1982
# Rejected - signal
1219
1983
@dbus.service.signal(_interface, signature="s")
1220
1984
def Rejected(self, reason):
1221
1985
"D-Bus signal"
1222
1986
pass
1223
1987
1224
1988
# NeedApproval - signal
1225
1989
@dbus.service.signal(_interface, signature="tb")
1226
1990
def NeedApproval(self, timeout, default):
1227
1991
"D-Bus signal"
1228
1992
return self.need_approval()
1229
1230
## Methods
1231
1993
1994
# Methods
1995
1232
1996
# Approve - method
1233
1997
@dbus.service.method(_interface, in_signature="b")
1234
1998
def Approve(self, value):
1235
1999
self.approve(value)
1236
2000
1237
2001
# CheckedOK - method
1238
2002
@dbus.service.method(_interface)
1239
2003
def CheckedOK(self):
1240
2004
self.checked_ok()
1241
2005
1242
2006
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1243
2008
@dbus.service.method(_interface)
1244
2009
def Enable(self):
1245
2010
"D-Bus method"
1246
2011
self.enable()
1247
2012
1248
2013
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1249
2015
@dbus.service.method(_interface)
1250
2016
def StartChecker(self):
1251
2017
"D-Bus method"
1252
2018
self.start_checker()
1253
2019
1254
2020
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1255
2022
@dbus.service.method(_interface)
1256
2023
def Disable(self):
1257
2024
"D-Bus method"
1258
2025
self.disable()
1259
2026
1260
2027
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1261
2029
@dbus.service.method(_interface)
1262
2030
def StopChecker(self):
1263
2031
self.stop_checker()
1264
1265
## Properties
1266
2032
2033
# Properties
2034
1267
2035
# ApprovalPending - property
1268
2036
@dbus_service_property(_interface, signature="b", access="read")
1269
2037
def ApprovalPending_dbus_property(self):
1270
2038
return dbus.Boolean(bool(self.approvals_pending))
1271
2039
1272
2040
# ApprovedByDefault - property
1273
@dbus_service_property(_interface, signature="b",
2041
@dbus_service_property(_interface,
2042
signature="b",
1274
2043
access="readwrite")
1275
2044
def ApprovedByDefault_dbus_property(self, value=None):
1276
2045
if value is None: # get
1277
2046
return dbus.Boolean(self.approved_by_default)
1278
2047
self.approved_by_default = bool(value)
1279
2048
1280
2049
# ApprovalDelay - property
1281
@dbus_service_property(_interface, signature="t",
2050
@dbus_service_property(_interface,
2051
signature="t",
1282
2052
access="readwrite")
1283
2053
def ApprovalDelay_dbus_property(self, value=None):
1284
2054
if value is None: # get
1285
return dbus.UInt64(self.approval_delay_milliseconds())
2055
return dbus.UInt64(self.approval_delay.total_seconds()
2056
* 1000)
1286
2057
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1287
2058
1288
2059
# ApprovalDuration - property
1289
@dbus_service_property(_interface, signature="t",
2060
@dbus_service_property(_interface,
2061
signature="t",
1290
2062
access="readwrite")
1291
2063
def ApprovalDuration_dbus_property(self, value=None):
1292
2064
if value is None: # get
1293
return dbus.UInt64(timedelta_to_milliseconds(
1294
self.approval_duration))
2065
return dbus.UInt64(self.approval_duration.total_seconds()
2066
* 1000)
1295
2067
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1296
2068
1297
2069
# Name - property
2070
@dbus_annotations(
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1298
2072
@dbus_service_property(_interface, signature="s", access="read")
1299
2073
def Name_dbus_property(self):
1300
2074
return dbus.String(self.name)
1301
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
1302
2083
# Fingerprint - property
2084
@dbus_annotations(
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1303
2086
@dbus_service_property(_interface, signature="s", access="read")
1304
2087
def Fingerprint_dbus_property(self):
1305
2088
return dbus.String(self.fingerprint)
1306
2089
1307
2090
# Host - property
1308
@dbus_service_property(_interface, signature="s",
2091
@dbus_service_property(_interface,
2092
signature="s",
1309
2093
access="readwrite")
1310
2094
def Host_dbus_property(self, value=None):
1311
2095
if value is None: # get
1312
2096
return dbus.String(self.host)
1313
self.host = unicode(value)
1314
2097
self.host = str(value)
2098
1315
2099
# Created - property
2100
@dbus_annotations(
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1316
2102
@dbus_service_property(_interface, signature="s", access="read")
1317
2103
def Created_dbus_property(self):
1318
2104
return datetime_to_dbus(self.created)
1319
2105
1320
2106
# LastEnabled - property
1321
2107
@dbus_service_property(_interface, signature="s", access="read")
1322
2108
def LastEnabled_dbus_property(self):
1323
2109
return datetime_to_dbus(self.last_enabled)
1324
2110
1325
2111
# Enabled - property
1326
@dbus_service_property(_interface, signature="b",
2112
@dbus_service_property(_interface,
2113
signature="b",
1327
2114
access="readwrite")
1328
2115
def Enabled_dbus_property(self, value=None):
1329
2116
if value is None: # get
1332
2119
self.enable()
1333
2120
else:
1334
2121
self.disable()
1335
2122
1336
2123
# LastCheckedOK - property
1337
@dbus_service_property(_interface, signature="s",
2124
@dbus_service_property(_interface,
2125
signature="s",
1338
2126
access="readwrite")
1339
2127
def LastCheckedOK_dbus_property(self, value=None):
1340
2128
if value is not None:
1341
2129
self.checked_ok()
1342
2130
return
1343
2131
return datetime_to_dbus(self.last_checked_ok)
1344
2132
1345
2133
# LastCheckerStatus - property
1346
@dbus_service_property(_interface, signature="n",
1347
access="read")
2134
@dbus_service_property(_interface, signature="n", access="read")
1348
2135
def LastCheckerStatus_dbus_property(self):
1349
2136
return dbus.Int16(self.last_checker_status)
1350
2137
1351
2138
# Expires - property
1352
2139
@dbus_service_property(_interface, signature="s", access="read")
1353
2140
def Expires_dbus_property(self):
1354
2141
return datetime_to_dbus(self.expires)
1355
2142
1356
2143
# LastApprovalRequest - property
1357
2144
@dbus_service_property(_interface, signature="s", access="read")
1358
2145
def LastApprovalRequest_dbus_property(self):
1359
2146
return datetime_to_dbus(self.last_approval_request)
1360
2147
1361
2148
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
2149
@dbus_service_property(_interface,
2150
signature="t",
1363
2151
access="readwrite")
1364
2152
def Timeout_dbus_property(self, value=None):
1365
2153
if value is None: # get
1366
return dbus.UInt64(self.timeout_milliseconds())
2154
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2155
old_timeout = self.timeout
1367
2156
self.timeout = datetime.timedelta(0, 0, 0, value)
1368
# Reschedule timeout
2157
# Reschedule disabling
1369
2158
if self.enabled:
1370
2159
now = datetime.datetime.utcnow()
1371
time_to_die = timedelta_to_milliseconds(
1372
(self.last_checked_ok + self.timeout) - now)
1373
if time_to_die <= 0:
2160
self.expires += self.timeout - old_timeout
2161
if self.expires <= now:
1374
2162
# The timeout has passed
1375
2163
self.disable()
1376
2164
else:
1377
self.expires = (now +
1378
datetime.timedelta(milliseconds =
1379
time_to_die))
1380
2165
if (getattr(self, "disable_initiator_tag", None)
1381
2166
is None):
1382
2167
return
1383
gobject.source_remove(self.disable_initiator_tag)
1384
self.disable_initiator_tag = (gobject.timeout_add
1385
(time_to_die,
1386
self.disable))
1387
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
1388
2173
# ExtendedTimeout - property
1389
@dbus_service_property(_interface, signature="t",
2174
@dbus_service_property(_interface,
2175
signature="t",
1390
2176
access="readwrite")
1391
2177
def ExtendedTimeout_dbus_property(self, value=None):
1392
2178
if value is None: # get
1393
return dbus.UInt64(self.extended_timeout_milliseconds())
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
2180
* 1000)
1394
2181
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1395
2182
1396
2183
# Interval - property
1397
@dbus_service_property(_interface, signature="t",
2184
@dbus_service_property(_interface,
2185
signature="t",
1398
2186
access="readwrite")
1399
2187
def Interval_dbus_property(self, value=None):
1400
2188
if value is None: # get
1401
return dbus.UInt64(self.interval_milliseconds())
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
1402
2190
self.interval = datetime.timedelta(0, 0, 0, value)
1403
2191
if getattr(self, "checker_initiator_tag", None) is None:
1404
2192
return
1405
2193
if self.enabled:
1406
2194
# Reschedule checker run
1407
gobject.source_remove(self.checker_initiator_tag)
1408
self.checker_initiator_tag = (gobject.timeout_add
1409
(value, self.start_checker))
1410
self.start_checker() # Start one now, too
1411
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
1412
2200
# Checker - property
1413
@dbus_service_property(_interface, signature="s",
2201
@dbus_service_property(_interface,
2202
signature="s",
1414
2203
access="readwrite")
1415
2204
def Checker_dbus_property(self, value=None):
1416
2205
if value is None: # get
1417
2206
return dbus.String(self.checker_command)
1418
self.checker_command = unicode(value)
1419
2207
self.checker_command = str(value)
2208
1420
2209
# CheckerRunning - property
1421
@dbus_service_property(_interface, signature="b",
2210
@dbus_service_property(_interface,
2211
signature="b",
1422
2212
access="readwrite")
1423
2213
def CheckerRunning_dbus_property(self, value=None):
1424
2214
if value is None: # get
1427
2217
self.start_checker()
1428
2218
else:
1429
2219
self.stop_checker()
1430
2220
1431
2221
# ObjectPath - property
2222
@dbus_annotations(
2223
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2224
"org.freedesktop.DBus.Deprecated": "true"})
1432
2225
@dbus_service_property(_interface, signature="o", access="read")
1433
2226
def ObjectPath_dbus_property(self):
1434
return self.dbus_object_path # is already a dbus.ObjectPath
1435
2227
return self.dbus_object_path # is already a dbus.ObjectPath
2228
1436
2229
# Secret = property
1437
@dbus_service_property(_interface, signature="ay",
1438
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)
1439
2237
def Secret_dbus_property(self, value):
1440
self.secret = str(value)
1441
2238
self.secret = bytes(value)
2239
1442
2240
del _interface
1443
2241
1444
2242
1445
class ProxyClient(object):
1446
def __init__(self, child_pipe, fpr, address):
2243
class ProxyClient:
2244
def __init__(self, child_pipe, key_id, fpr, address):
1447
2245
self._pipe = child_pipe
1448
self._pipe.send(('init', fpr, address))
2246
self._pipe.send(('init', key_id, fpr, address))
1449
2247
if not self._pipe.recv():
1450
raise KeyError()
1451
2248
raise KeyError(key_id or fpr)
2249
1452
2250
def __getattribute__(self, name):
1453
2251
if name == '_pipe':
1454
2252
return super(ProxyClient, self).__getattribute__(name)
1457
2255
if data[0] == 'data':
1458
2256
return data[1]
1459
2257
if data[0] == 'function':
2258
1460
2259
def func(*args, **kwargs):
1461
2260
self._pipe.send(('funcall', name, args, kwargs))
1462
2261
return self._pipe.recv()[1]
2262
1463
2263
return func
1464
2264
1465
2265
def __setattr__(self, name, value):
1466
2266
if name == '_pipe':
1467
2267
return super(ProxyClient, self).__setattr__(name, value)
1468
2268
self._pipe.send(('setattr', name, value))
1469
2269
1470
2270
1471
class ClientDBusTransitional(ClientDBus):
1472
__metaclass__ = AlternateDBusNamesMetaclass
1473
1474
1475
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
1476
2272
"""A class to handle client connections.
1477
2273
1478
2274
Instantiated once for each connection to handle it.
1479
2275
Note: This will run in its own forked process."""
1480
2276
1481
2277
def handle(self):
1482
2278
with contextlib.closing(self.server.child_pipe) as child_pipe:
1483
2279
logger.info("TCP connection from: %s",
1484
unicode(self.client_address))
2280
str(self.client_address))
1485
2281
logger.debug("Pipe FD: %d",
1486
2282
self.server.child_pipe.fileno())
1487
1488
session = (gnutls.connection
1489
.ClientSession(self.request,
1490
gnutls.connection
1491
.X509Credentials()))
1492
1493
# Note: gnutls.connection.X509Credentials is really a
1494
# generic GnuTLS certificate credentials object so long as
1495
# no X.509 keys are added to it. Therefore, we can use it
1496
# here despite using OpenPGP certificates.
1497
1498
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1499
# "+AES-256-CBC", "+SHA1",
1500
# "+COMP-NULL", "+CTYPE-OPENPGP",
1501
# "+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"))
1502
2290
# Use a fallback default, since this MUST be set.
1503
2291
priority = self.server.gnutls_priority
1504
2292
if priority is None:
1505
2293
priority = "NORMAL"
1506
(gnutls.library.functions
1507
.gnutls_priority_set_direct(session._c_object,
1508
priority, None))
1509
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
2296
None)
2297
1510
2298
# Start communication using the Mandos protocol
1511
2299
# Get protocol number
1512
2300
line = self.request.makefile().readline()
1513
2301
logger.debug("Protocol version: %r", line)
1514
2302
try:
1515
2303
if int(line.strip().split()[0]) > 1:
1516
raise RuntimeError
2304
raise RuntimeError(line)
1517
2305
except (ValueError, IndexError, RuntimeError) as error:
1518
2306
logger.error("Unknown protocol version: %s", error)
1519
2307
return
1520
2308
1521
2309
# Start GnuTLS connection
1522
2310
try:
1523
2311
session.handshake()
1524
except gnutls.errors.GNUTLSError as error:
2312
except gnutls.Error as error:
1525
2313
logger.warning("Handshake failed: %s", error)
1526
2314
# Do not run session.bye() here: the session is not
1527
2315
# established. Just abandon the request.
1528
2316
return
1529
2317
logger.debug("Handshake succeeded")
1530
2318
1531
2319
approval_required = False
1532
2320
try:
1533
try:
1534
fpr = self.fingerprint(self.peer_certificate
1535
(session))
1536
except (TypeError,
1537
gnutls.errors.GNUTLSError) as error:
1538
logger.warning("Bad certificate: %s", error)
1539
return
1540
logger.debug("Fingerprint: %s", fpr)
1541
1542
try:
1543
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,
1544
2343
self.client_address)
1545
2344
except KeyError:
1546
2345
return
1547
2346
1548
2347
if client.approval_delay:
1549
2348
delay = client.approval_delay
1550
2349
client.approvals_pending += 1
1551
2350
approval_required = True
1552
2351
1553
2352
while True:
1554
2353
if not client.enabled:
1555
2354
logger.info("Client %s is disabled",
1556
client.name)
2355
client.name)
1557
2356
if self.server.use_dbus:
1558
2357
# Emit D-Bus signal
1559
2358
client.Rejected("Disabled")
1560
2359
return
1561
2360
1562
2361
if client.approved or not client.approval_delay:
1563
#We are approved or approval is disabled
2362
# We are approved or approval is disabled
1564
2363
break
1565
2364
elif client.approved is None:
1566
2365
logger.info("Client %s needs approval",
1568
2367
if self.server.use_dbus:
1569
2368
# Emit D-Bus signal
1570
2369
client.NeedApproval(
1571
client.approval_delay_milliseconds(),
1572
client.approved_by_default)
2370
client.approval_delay.total_seconds()
2371
* 1000, client.approved_by_default)
1573
2372
else:
1574
2373
logger.warning("Client %s was not approved",
1575
2374
client.name)
1577
2376
# Emit D-Bus signal
1578
2377
client.Rejected("Denied")
1579
2378
return
1580
1581
#wait until timeout or approved
2379
2380
# wait until timeout or approved
1582
2381
time = datetime.datetime.now()
1583
2382
client.changedstate.acquire()
1584
(client.changedstate.wait
1585
(float(client.timedelta_to_milliseconds(delay)
1586
/ 1000)))
2383
client.changedstate.wait(delay.total_seconds())
1587
2384
client.changedstate.release()
1588
2385
time2 = datetime.datetime.now()
1589
2386
if (time2 - time) >= delay:
1599
2396
break
1600
2397
else:
1601
2398
delay -= time2 - time
1602
1603
sent_size = 0
1604
while sent_size < len(client.secret):
1605
try:
1606
sent = session.send(client.secret[sent_size:])
1607
except gnutls.errors.GNUTLSError as error:
1608
logger.warning("gnutls send failed")
1609
return
1610
logger.debug("Sent: %d, remaining: %d",
1611
sent, len(client.secret)
1612
- (sent_size + sent))
1613
sent_size += sent
1614
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
1615
2407
logger.info("Sending secret to %s", client.name)
1616
2408
# bump the timeout using extended_timeout
1617
2409
client.bump_timeout(client.extended_timeout)
1618
2410
if self.server.use_dbus:
1619
2411
# Emit D-Bus signal
1620
2412
client.GotSecret()
1621
2413
1622
2414
finally:
1623
2415
if approval_required:
1624
2416
client.approvals_pending -= 1
1625
2417
try:
1626
2418
session.bye()
1627
except gnutls.errors.GNUTLSError as error:
1628
logger.warning("GnuTLS bye failed")
1629
2419
except gnutls.Error as error:
2420
logger.warning("GnuTLS bye failed",
2421
exc_info=error)
2422
1630
2423
@staticmethod
1631
2424
def peer_certificate(session):
1632
"Return the peer's OpenPGP certificate as a bytestring"
1633
# If not an OpenPGP certificate...
1634
if (gnutls.library.functions
1635
.gnutls_certificate_type_get(session._c_object)
1636
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1637
# ...do the normal thing
1638
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""
1639
2441
list_size = ctypes.c_uint(1)
1640
cert_list = (gnutls.library.functions
1641
.gnutls_certificate_get_peers
2442
cert_list = (gnutls.certificate_get_peers
1642
2443
(session._c_object, ctypes.byref(list_size)))
1643
2444
if not bool(cert_list) and list_size.value != 0:
1644
raise gnutls.errors.GNUTLSError("error getting peer"
1645
" certificate")
2445
raise gnutls.Error("error getting peer certificate")
1646
2446
if list_size.value == 0:
1647
2447
return None
1648
2448
cert = cert_list[0]
1649
2449
return ctypes.string_at(cert.data, cert.size)
1650
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
1651
2485
@staticmethod
1652
2486
def fingerprint(openpgp):
1653
2487
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1654
2488
# New GnuTLS "datum" with the OpenPGP public key
1655
datum = (gnutls.library.types
1656
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1657
ctypes.POINTER
1658
(ctypes.c_ubyte)),
1659
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)))
1660
2493
# New empty GnuTLS certificate
1661
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1664
2496
# Import the OpenPGP public key into the certificate
1665
(gnutls.library.functions
1666
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1667
gnutls.library.constants
1668
.GNUTLS_OPENPGP_FMT_RAW))
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1669
2499
# Verify the self signature in the key
1670
2500
crtverify = ctypes.c_uint()
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_verify_self(crt, 0,
1673
ctypes.byref(crtverify)))
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1674
2503
if crtverify.value != 0:
1675
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1676
raise (gnutls.errors.CertificateSecurityError
1677
("Verify failed"))
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
2506
=crtverify.value)
1678
2507
# New buffer for the fingerprint
1679
2508
buf = ctypes.create_string_buffer(20)
1680
2509
buf_len = ctypes.c_size_t()
1681
2510
# Get the fingerprint from the certificate into the buffer
1682
(gnutls.library.functions
1683
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1684
ctypes.byref(buf_len)))
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1685
2513
# Deinit the certificate
1686
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2514
gnutls.openpgp_crt_deinit(crt)
1687
2515
# Convert the buffer to a Python bytestring
1688
2516
fpr = ctypes.string_at(buf, buf_len.value)
1689
2517
# Convert the bytestring to hexadecimal notation
1691
2519
return hex_fpr
1692
2520
1693
2521
1694
class MultiprocessingMixIn(object):
2522
class MultiprocessingMixIn:
1695
2523
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2524
1696
2525
def sub_process_main(self, request, address):
1697
2526
try:
1698
2527
self.finish_request(request, address)
1699
2528
except Exception:
1700
2529
self.handle_error(request, address)
1701
2530
self.close_request(request)
1702
2531
1703
2532
def process_request(self, request, address):
1704
2533
"""Start a new process to process the request."""
1705
proc = multiprocessing.Process(target = self.sub_process_main,
1706
args = (request,
1707
address))
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
1708
2536
proc.start()
1709
2537
return proc
1710
2538
1711
2539
1712
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1713
2541
""" adds a pipe to the MixIn """
2542
1714
2543
def process_request(self, request, client_address):
1715
2544
"""Overrides and wraps the original process_request().
1716
2545
1717
2546
This function creates a new pipe in self.pipe
1718
2547
"""
1719
2548
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1720
2549
1721
2550
proc = MultiprocessingMixIn.process_request(self, request,
1722
2551
client_address)
1723
2552
self.child_pipe.close()
1724
2553
self.add_pipe(parent_pipe, proc)
1725
2554
1726
2555
def add_pipe(self, parent_pipe, proc):
1727
2556
"""Dummy function; override as necessary"""
1728
raise NotImplementedError
2557
raise NotImplementedError()
1729
2558
1730
2559
1731
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1732
socketserver.TCPServer, object):
2561
socketserver.TCPServer):
1733
2562
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1734
2563
1735
2564
Attributes:
1736
2565
enabled: Boolean; whether this server is activated yet
1737
2566
interface: None or a network interface name (string)
1738
2567
use_ipv6: Boolean; to use IPv6 or not
1739
2568
"""
2569
1740
2570
def __init__(self, server_address, RequestHandlerClass,
1741
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
"""
1742
2577
self.interface = interface
1743
2578
if use_ipv6:
1744
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.
1745
2607
socketserver.TCPServer.__init__(self, server_address,
1746
2608
RequestHandlerClass)
2609
1747
2610
def server_bind(self):
1748
2611
"""This overrides the normal server_bind() function
1749
2612
to bind to an interface if one was specified, and also NOT to
1750
2613
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
1751
2615
if self.interface is not None:
1752
2616
if SO_BINDTODEVICE is None:
1753
logger.error("SO_BINDTODEVICE does not exist;"
1754
" cannot bind to interface %s",
1755
self.interface)
1756
else:
1757
try:
1758
self.socket.setsockopt(socket.SOL_SOCKET,
1759
SO_BINDTODEVICE,
1760
str(self.interface
1761
+ '\0'))
1762
except socket.error as error:
1763
if error[0] == errno.EPERM:
1764
logger.error("No permission to"
1765
" bind to interface %s",
1766
self.interface)
1767
elif error[0] == errno.ENOPROTOOPT:
1768
logger.error("SO_BINDTODEVICE not available;"
1769
" cannot bind to interface %s",
1770
self.interface)
1771
else:
1772
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
1773
2638
# Only bind(2) the socket if we really need to.
1774
2639
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
1775
2642
if not self.server_address[0]:
1776
2643
if self.address_family == socket.AF_INET6:
1777
any_address = "::" # in6addr_any
2644
any_address = "::" # in6addr_any
1778
2645
else:
1779
any_address = socket.INADDR_ANY
2646
any_address = "0.0.0.0" # INADDR_ANY
1780
2647
self.server_address = (any_address,
1781
2648
self.server_address[1])
1782
2649
elif not self.server_address[1]:
1783
self.server_address = (self.server_address[0],
1784
0)
2650
self.server_address = (self.server_address[0], 0)
1785
2651
# if self.interface:
1786
2652
# self.server_address = (self.server_address[0],
1787
2653
# 0, # port
1793
2659
1794
2660
class MandosServer(IPv6_TCPServer):
1795
2661
"""Mandos server.
1796
2662
1797
2663
Attributes:
1798
2664
clients: set of Client objects
1799
2665
gnutls_priority GnuTLS priority string
1800
2666
use_dbus: Boolean; to emit D-Bus signals or not
1801
1802
Assumes a gobject.MainLoop event loop.
2667
2668
Assumes a GLib.MainLoop event loop.
1803
2669
"""
2670
1804
2671
def __init__(self, server_address, RequestHandlerClass,
1805
interface=None, use_ipv6=True, clients=None,
1806
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):
1807
2678
self.enabled = False
1808
2679
self.clients = clients
1809
2680
if self.clients is None:
1812
2683
self.gnutls_priority = gnutls_priority
1813
2684
IPv6_TCPServer.__init__(self, server_address,
1814
2685
RequestHandlerClass,
1815
interface = interface,
1816
use_ipv6 = use_ipv6)
2686
interface=interface,
2687
use_ipv6=use_ipv6,
2688
socketfd=socketfd)
2689
1817
2690
def server_activate(self):
1818
2691
if self.enabled:
1819
2692
return socketserver.TCPServer.server_activate(self)
1820
2693
1821
2694
def enable(self):
1822
2695
self.enabled = True
1823
2696
1824
2697
def add_pipe(self, parent_pipe, proc):
1825
2698
# Call "handle_ipc" for both data and EOF events
1826
gobject.io_add_watch(parent_pipe.fileno(),
1827
gobject.IO_IN | gobject.IO_HUP,
1828
functools.partial(self.handle_ipc,
1829
parent_pipe =
1830
parent_pipe,
1831
proc = proc))
1832
1833
def handle_ipc(self, source, condition, parent_pipe=None,
1834
proc = None, client_object=None):
1835
condition_names = {
1836
gobject.IO_IN: "IN", # There is data to read.
1837
gobject.IO_OUT: "OUT", # Data can be written (without
1838
# blocking).
1839
gobject.IO_PRI: "PRI", # There is urgent data to read.
1840
gobject.IO_ERR: "ERR", # Error condition.
1841
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1842
# broken, usually for pipes and
1843
# sockets).
1844
}
1845
conditions_string = ' | '.join(name
1846
for cond, name in
1847
condition_names.iteritems()
1848
if cond & condition)
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):
1849
2710
# error, or the other end of multiprocessing.Pipe has closed
1850
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1851
2712
# Wait for other process to exit
1852
2713
proc.join()
1853
2714
return False
1854
2715
1855
2716
# Read a request from the child
1856
2717
request = parent_pipe.recv()
1857
2718
command = request[0]
1858
2719
1859
2720
if command == 'init':
1860
fpr = request[1]
1861
address = request[2]
1862
1863
for c in self.clients.itervalues():
1864
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:
1865
2732
client = c
1866
2733
break
1867
2734
else:
1868
logger.info("Client not found for fingerprint: %s, ad"
1869
"dress: %s", fpr, address)
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
1870
2737
if self.use_dbus:
1871
2738
# Emit D-Bus signal
1872
mandos_dbus_service.ClientNotFound(fpr,
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
1873
2740
address[0])
1874
2741
parent_pipe.send(False)
1875
2742
return False
1876
1877
gobject.io_add_watch(parent_pipe.fileno(),
1878
gobject.IO_IN | gobject.IO_HUP,
1879
functools.partial(self.handle_ipc,
1880
parent_pipe =
1881
parent_pipe,
1882
proc = proc,
1883
client_object =
1884
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))
1885
2751
parent_pipe.send(True)
1886
2752
# remove the old hook in favor of the new above hook on
1887
2753
# same fileno
1890
2756
funcname = request[1]
1891
2757
args = request[2]
1892
2758
kwargs = request[3]
1893
2759
1894
2760
parent_pipe.send(('data', getattr(client_object,
1895
2761
funcname)(*args,
1896
**kwargs)))
1897
2762
**kwargs)))
2763
1898
2764
if command == 'getattr':
1899
2765
attrname = request[1]
1900
if callable(client_object.__getattribute__(attrname)):
1901
parent_pipe.send(('function',))
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
1902
2769
else:
1903
parent_pipe.send(('data', client_object
1904
.__getattribute__(attrname)))
1905
2770
parent_pipe.send((
2771
'data', client_object.__getattribute__(attrname)))
2772
1906
2773
if command == 'setattr':
1907
2774
attrname = request[1]
1908
2775
value = request[2]
1909
2776
setattr(client_object, attrname, value)
1910
2777
1911
2778
return True
1912
2779
1913
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
1914
2880
def string_to_delta(interval):
1915
2881
"""Parse a string and return a datetime.timedelta
1916
1917
>>> string_to_delta('7d')
1918
datetime.timedelta(7)
1919
>>> string_to_delta('60s')
1920
datetime.timedelta(0, 60)
1921
>>> string_to_delta('60m')
1922
datetime.timedelta(0, 3600)
1923
>>> string_to_delta('24h')
1924
datetime.timedelta(1)
1925
>>> string_to_delta('1w')
1926
datetime.timedelta(7)
1927
>>> string_to_delta('5m 30s')
1928
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
1929
2895
"""
2896
2897
try:
2898
return rfc3339_duration_to_delta(interval)
2899
except ValueError:
2900
pass
2901
1930
2902
timevalue = datetime.timedelta(0)
1931
2903
for s in interval.split():
1932
2904
try:
1933
suffix = unicode(s[-1])
2905
suffix = s[-1]
1934
2906
value = int(s[:-1])
1935
2907
if suffix == "d":
1936
2908
delta = datetime.timedelta(value)
1943
2915
elif suffix == "w":
1944
2916
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1945
2917
else:
1946
raise ValueError("Unknown suffix %r" % suffix)
1947
except (ValueError, IndexError) as e:
2918
raise ValueError("Unknown suffix {!r}".format(suffix))
2919
except IndexError as e:
1948
2920
raise ValueError(*(e.args))
1949
2921
timevalue += delta
1950
2922
return timevalue
1951
2923
1952
2924
1953
def daemon(nochdir = False, noclose = False):
2925
def daemon(nochdir=False, noclose=False):
1954
2926
"""See daemon(3). Standard BSD Unix function.
1955
2927
1956
2928
This should really exist as os.daemon, but it doesn't (yet)."""
1957
2929
if os.fork():
1958
2930
sys.exit()
1963
2935
sys.exit()
1964
2936
if not noclose:
1965
2937
# Close all standard open file descriptors
1966
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2938
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1967
2939
if not stat.S_ISCHR(os.fstat(null).st_mode):
1968
2940
raise OSError(errno.ENODEV,
1969
"%s not a character device"
1970
% os.path.devnull)
2941
"{} not a character device"
2942
.format(os.devnull))
1971
2943
os.dup2(null, sys.stdin.fileno())
1972
2944
os.dup2(null, sys.stdout.fileno())
1973
2945
os.dup2(null, sys.stderr.fileno())
1976
2948
1977
2949
1978
2950
def main():
1979
2951
1980
2952
##################################################################
1981
2953
# Parsing of options, both command line and config file
1982
2954
1983
2955
parser = argparse.ArgumentParser()
1984
2956
parser.add_argument("-v", "--version", action="version",
1985
version = "%%(prog)s %s" % version,
2957
version="%(prog)s {}".format(version),
1986
2958
help="show version number and exit")
1987
2959
parser.add_argument("-i", "--interface", metavar="IF",
1988
2960
help="Bind to interface IF")
1994
2966
help="Run self-test")
1995
2967
parser.add_argument("--debug", action="store_true",
1996
2968
help="Debug mode; run in foreground and log"
1997
" to terminal")
2969
" to terminal", default=None)
1998
2970
parser.add_argument("--debuglevel", metavar="LEVEL",
1999
2971
help="Debug level for stdout output")
2000
2972
parser.add_argument("--priority", help="GnuTLS"
2007
2979
" files")
2008
2980
parser.add_argument("--no-dbus", action="store_false",
2009
2981
dest="use_dbus", help="Do not provide D-Bus"
2010
" system bus interface")
2982
" system bus interface", default=None)
2011
2983
parser.add_argument("--no-ipv6", action="store_false",
2012
dest="use_ipv6", help="Do not use IPv6")
2984
dest="use_ipv6", help="Do not use IPv6",
2985
default=None)
2013
2986
parser.add_argument("--no-restore", action="store_false",
2014
2987
dest="restore", help="Do not restore stored"
2015
" 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")
2016
2992
parser.add_argument("--statedir", metavar="DIR",
2017
2993
help="Directory to save/restore state in")
2018
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
2019
3000
options = parser.parse_args()
2020
2021
if options.check:
2022
import doctest
2023
doctest.testmod()
2024
sys.exit()
2025
3001
2026
3002
# Default values for config file for server-global settings
2027
server_defaults = { "interface": "",
2028
"address": "",
2029
"port": "",
2030
"debug": "False",
2031
"priority":
2032
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2033
"servicename": "Mandos",
2034
"use_dbus": "True",
2035
"use_ipv6": "True",
2036
"debuglevel": "",
2037
"restore": "True",
2038
"statedir": "/var/lib/mandos"
2039
}
2040
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
2041
3026
# Parse config file for server-global settings
2042
server_config = configparser.SafeConfigParser(server_defaults)
3027
server_config = configparser.ConfigParser(server_defaults)
2043
3028
del server_defaults
2044
server_config.read(os.path.join(options.configdir,
2045
"mandos.conf"))
2046
# 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
2047
3031
server_settings = server_config.defaults()
2048
3032
# Use the appropriate methods on the non-string config options
2049
for option in ("debug", "use_dbus", "use_ipv6"):
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2050
3035
server_settings[option] = server_config.getboolean("DEFAULT",
2051
3036
option)
2052
3037
if server_settings["port"]:
2053
3038
server_settings["port"] = server_config.getint("DEFAULT",
2054
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"])
2055
3049
del server_config
2056
3050
2057
3051
# Override the settings from the config file with command line
2058
3052
# options, if set.
2059
3053
for option in ("interface", "address", "port", "debug",
2060
"priority", "servicename", "configdir",
2061
"use_dbus", "use_ipv6", "debuglevel", "restore",
2062
"statedir"):
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
2063
3057
value = getattr(options, option)
2064
3058
if value is not None:
2065
3059
server_settings[option] = value
2066
3060
del options
2067
3061
# Force all strings to be unicode
2068
3062
for option in server_settings.keys():
2069
if type(server_settings[option]) is str:
2070
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
2071
3073
# Now we have our good server settings in "server_settings"
2072
3074
2073
3075
##################################################################
2074
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
2075
3082
# For convenience
2076
3083
debug = server_settings["debug"]
2077
3084
debuglevel = server_settings["debuglevel"]
2079
3086
use_ipv6 = server_settings["use_ipv6"]
2080
3087
stored_state_path = os.path.join(server_settings["statedir"],
2081
3088
stored_state_file)
2082
3089
foreground = server_settings["foreground"]
3090
zeroconf = server_settings["zeroconf"]
3091
2083
3092
if debug:
2084
3093
initlogger(debug, logging.DEBUG)
2085
3094
else:
2088
3097
else:
2089
3098
level = getattr(logging, debuglevel.upper())
2090
3099
initlogger(debug, level)
2091
3100
2092
3101
if server_settings["servicename"] != "Mandos":
2093
syslogger.setFormatter(logging.Formatter
2094
('Mandos (%s) [%%(process)d]:'
2095
' %%(levelname)s: %%(message)s'
2096
% server_settings["servicename"]))
2097
3102
syslogger.setFormatter(
3103
logging.Formatter('Mandos ({}) [%(process)d]:'
3104
' %(levelname)s: %(message)s'.format(
3105
server_settings["servicename"])))
3106
2098
3107
# Parse config file with clients
2099
client_config = configparser.SafeConfigParser(Client
2100
.client_defaults)
3108
client_config = configparser.ConfigParser(Client.client_defaults)
2101
3109
client_config.read(os.path.join(server_settings["configdir"],
2102
3110
"clients.conf"))
2103
3111
2104
3112
global mandos_dbus_service
2105
3113
mandos_dbus_service = None
2106
2107
tcp_server = MandosServer((server_settings["address"],
2108
server_settings["port"]),
2109
ClientHandler,
2110
interface=(server_settings["interface"]
2111
or None),
2112
use_ipv6=use_ipv6,
2113
gnutls_priority=
2114
server_settings["priority"],
2115
use_dbus=use_dbus)
2116
if not debug:
2117
pidfilename = "/var/run/mandos.pid"
2118
try:
2119
pidfile = open(pidfilename, "w")
2120
except IOError:
2121
logger.error("Could not open file %r", pidfilename)
2122
2123
try:
2124
uid = pwd.getpwnam("_mandos").pw_uid
2125
gid = pwd.getpwnam("_mandos").pw_gid
2126
except KeyError:
2127
try:
2128
uid = pwd.getpwnam("mandos").pw_uid
2129
gid = pwd.getpwnam("mandos").pw_gid
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
3131
try:
3132
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3133
except IOError as e:
3134
logger.error("Could not open file %r", pidfilename,
3135
exc_info=e)
3136
3137
for name, group in (("_mandos", "_mandos"),
3138
("mandos", "mandos"),
3139
("nobody", "nogroup")):
3140
try:
3141
uid = pwd.getpwnam(name).pw_uid
3142
gid = pwd.getpwnam(group).pw_gid
3143
break
2130
3144
except KeyError:
2131
try:
2132
uid = pwd.getpwnam("nobody").pw_uid
2133
gid = pwd.getpwnam("nobody").pw_gid
2134
except KeyError:
2135
uid = 65534
2136
gid = 65534
3145
continue
3146
else:
3147
uid = 65534
3148
gid = 65534
2137
3149
try:
2138
3150
os.setgid(gid)
2139
3151
os.setuid(uid)
3152
if debug:
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3154
gid))
2140
3155
except OSError as error:
2141
if error[0] != errno.EPERM:
2142
raise error
2143
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
if error.errno != errno.EPERM:
3159
raise
3160
2144
3161
if debug:
2145
3162
# Enable all possible GnuTLS debugging
2146
3163
2147
3164
# "Use a log level over 10 to enable all debugging options."
2148
3165
# - GnuTLS manual
2149
gnutls.library.functions.gnutls_global_set_log_level(11)
2150
2151
@gnutls.library.types.gnutls_log_func
3166
gnutls.global_set_log_level(11)
3167
3168
@gnutls.log_func
2152
3169
def debug_gnutls(level, string):
2153
3170
logger.debug("GnuTLS: %s", string[:-1])
2154
2155
(gnutls.library.functions
2156
.gnutls_global_set_log_function(debug_gnutls))
2157
3171
3172
gnutls.global_set_log_function(debug_gnutls)
3173
2158
3174
# Redirect stdin so all checkers get /dev/null
2159
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2160
3176
os.dup2(null, sys.stdin.fileno())
2161
3177
if null > 2:
2162
3178
os.close(null)
2163
3179
2164
3180
# Need to fork before connecting to D-Bus
2165
if not debug:
3181
if not foreground:
2166
3182
# Close all input and output, do double fork, etc.
2167
3183
daemon()
2168
2169
gobject.threads_init()
2170
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
2171
3190
global main_loop
2172
3191
# From the Avahi example code
2173
DBusGMainLoop(set_as_default=True )
2174
main_loop = gobject.MainLoop()
3192
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
2175
3194
bus = dbus.SystemBus()
2176
3195
# End of Avahi example code
2177
3196
if use_dbus:
2178
3197
try:
2179
3198
bus_name = dbus.service.BusName("se.recompile.Mandos",
2180
bus, do_not_queue=True)
2181
old_bus_name = (dbus.service.BusName
2182
("se.bsnet.fukt.Mandos", bus,
2183
do_not_queue=True))
2184
except dbus.exceptions.NameExistsException as e:
2185
logger.error(unicode(e) + ", disabling D-Bus")
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:
3205
logger.error("Disabling D-Bus:", exc_info=e)
2186
3206
use_dbus = False
2187
3207
server_settings["use_dbus"] = False
2188
3208
tcp_server.use_dbus = False
2189
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2190
service = AvahiServiceToSyslog(name =
2191
server_settings["servicename"],
2192
servicetype = "_mandos._tcp",
2193
protocol = protocol, bus = bus)
2194
if server_settings["interface"]:
2195
service.interface = (if_nametoindex
2196
(str(server_settings["interface"])))
2197
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
2198
3220
global multiprocessing_manager
2199
3221
multiprocessing_manager = multiprocessing.Manager()
2200
3222
2201
3223
client_class = Client
2202
3224
if use_dbus:
2203
client_class = functools.partial(ClientDBusTransitional,
2204
bus = bus)
2205
3225
client_class = functools.partial(ClientDBus, bus=bus)
3226
2206
3227
client_settings = Client.config_parser(client_config)
2207
3228
old_client_settings = {}
2208
3229
clients_data = {}
2209
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
2210
3239
# Get client data and settings from last running state.
2211
3240
if server_settings["restore"]:
2212
3241
try:
2213
3242
with open(stored_state_path, "rb") as stored_state:
2214
clients_data, old_client_settings = (pickle.load
2215
(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"))
2216
3293
os.remove(stored_state_path)
2217
3294
except IOError as e:
2218
logger.warning("Could not load persistent state: {0}"
2219
.format(e))
2220
if e.errno != errno.ENOENT:
3295
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
3298
else:
3299
logger.critical("Could not load persistent state:",
3300
exc_info=e)
2221
3301
raise
2222
3302
except EOFError as e:
2223
3303
logger.warning("Could not load persistent state: "
2224
"EOFError: {0}".format(e))
2225
3304
"EOFError:",
3305
exc_info=e)
3306
2226
3307
with PGPEngine() as pgp:
2227
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
2228
3313
# Decide which value to use after restoring saved state.
2229
3314
# We have three different values: Old config file,
2230
3315
# new config file, and saved state.
2235
3320
# For each value in new config, check if it
2236
3321
# differs from the old config value (Except for
2237
3322
# the "secret" attribute)
2238
if (name != "secret" and
2239
value != old_client_settings[client_name]
2240
[name]):
3323
if (name != "secret"
3324
and (value !=
3325
old_client_settings[client_name][name])):
2241
3326
client[name] = value
2242
3327
except KeyError:
2243
3328
pass
2244
3329
2245
3330
# Clients who has passed its expire date can still be
2246
# enabled if its last checker was successful. Clients
3331
# enabled if its last checker was successful. A Client
2247
3332
# whose checker succeeded before we stored its state is
2248
3333
# assumed to have successfully run all checkers during
2249
3334
# downtime.
2251
3336
if datetime.datetime.utcnow() >= client["expires"]:
2252
3337
if not client["last_checked_ok"]:
2253
3338
logger.warning(
2254
"disabling client {0} - Client never "
2255
"performed a successful checker"
2256
.format(client_name))
3339
"disabling client {} - Client never "
3340
"performed a successful checker".format(
3341
client_name))
2257
3342
client["enabled"] = False
2258
3343
elif client["last_checker_status"] != 0:
2259
3344
logger.warning(
2260
"disabling client {0} - Client "
2261
"last checker failed with error code {1}"
2262
.format(client_name,
2263
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"]))
2264
3350
client["enabled"] = False
2265
3351
else:
2266
client["expires"] = (datetime.datetime
2267
.utcnow()
2268
+ client["timeout"])
3352
client["expires"] = (
3353
datetime.datetime.utcnow()
3354
+ client["timeout"])
2269
3355
logger.debug("Last checker succeeded,"
2270
" keeping {0} enabled"
2271
.format(client_name))
3356
" keeping {} enabled".format(
3357
client_name))
2272
3358
try:
2273
client["secret"] = (
2274
pgp.decrypt(client["encrypted_secret"],
2275
client_settings[client_name]
2276
["secret"]))
3359
client["secret"] = pgp.decrypt(
3360
client["encrypted_secret"],
3361
client_settings[client_name]["secret"])
2277
3362
except PGPError:
2278
3363
# If decryption fails, we use secret from new settings
2279
logger.debug("Failed to decrypt {0} old secret"
2280
.format(client_name))
2281
client["secret"] = (
2282
client_settings[client_name]["secret"])
3364
logger.debug("Failed to decrypt {} old secret".format(
3365
client_name))
3366
client["secret"] = (client_settings[client_name]
3367
["secret"])
2283
3368
2284
2285
3369
# Add/remove clients based on new changes made to config
2286
3370
for client_name in (set(old_client_settings)
2287
3371
- set(client_settings)):
2291
3375
clients_data[client_name] = client_settings[client_name]
2292
3376
2293
3377
# Create all client objects
2294
for client_name, client in clients_data.iteritems():
3378
for client_name, client in clients_data.items():
2295
3379
tcp_server.clients[client_name] = client_class(
2296
name = client_name, settings = client)
2297
3380
name=client_name,
3381
settings=client,
3382
server_settings=server_settings)
3383
2298
3384
if not tcp_server.clients:
2299
3385
logger.warning("No clients defined")
2300
2301
if not debug:
2302
try:
2303
with pidfile:
2304
pid = os.getpid()
2305
pidfile.write(str(pid) + "\n".encode("utf-8"))
2306
del pidfile
2307
except IOError:
2308
logger.error("Could not write to file %r with PID %d",
2309
pidfilename, pid)
2310
except NameError:
2311
# "pidfile" was never created
2312
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
2313
3397
del pidfilename
2314
signal.signal(signal.SIGINT, signal.SIG_IGN)
2315
2316
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2317
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2318
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
2319
3403
if use_dbus:
2320
class MandosDBusService(dbus.service.Object):
3404
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2321
3408
"""A D-Bus proxy object"""
3409
2322
3410
def __init__(self):
2323
3411
dbus.service.Object.__init__(self, bus, "/")
3412
2324
3413
_interface = "se.recompile.Mandos"
2325
3414
2326
3415
@dbus.service.signal(_interface, signature="o")
2327
3416
def ClientAdded(self, objpath):
2328
3417
"D-Bus signal"
2329
3418
pass
2330
3419
2331
3420
@dbus.service.signal(_interface, signature="ss")
2332
def ClientNotFound(self, fingerprint, address):
3421
def ClientNotFound(self, key_id, address):
2333
3422
"D-Bus signal"
2334
3423
pass
2335
3424
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3426
"true"})
2336
3427
@dbus.service.signal(_interface, signature="os")
2337
3428
def ClientRemoved(self, objpath, name):
2338
3429
"D-Bus signal"
2339
3430
pass
2340
3431
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3433
"true"})
2341
3434
@dbus.service.method(_interface, out_signature="ao")
2342
3435
def GetAllClients(self):
2343
3436
"D-Bus method"
2344
return dbus.Array(c.dbus_object_path
2345
for c in
2346
tcp_server.clients.itervalues())
2347
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"})
2348
3442
@dbus.service.method(_interface,
2349
3443
out_signature="a{oa{sv}}")
2350
3444
def GetAllClientsWithProperties(self):
2351
3445
"D-Bus method"
2352
3446
return dbus.Dictionary(
2353
((c.dbus_object_path, c.GetAll(""))
2354
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()},
2355
3450
signature="oa{sv}")
2356
3451
2357
3452
@dbus.service.method(_interface, in_signature="o")
2358
3453
def RemoveClient(self, object_path):
2359
3454
"D-Bus method"
2360
for c in tcp_server.clients.itervalues():
3455
for c in tcp_server.clients.values():
2361
3456
if c.dbus_object_path == object_path:
2362
3457
del tcp_server.clients[c.name]
2363
3458
c.remove_from_connection()
2364
# Don't signal anything except ClientRemoved
3459
# Don't signal the disabling
2365
3460
c.disable(quiet=True)
2366
# Emit D-Bus signal
2367
self.ClientRemoved(object_path, c.name)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2368
3463
return
2369
3464
raise KeyError(object_path)
2370
3465
2371
3466
del _interface
2372
2373
class MandosDBusServiceTransitional(MandosDBusService):
2374
__metaclass__ = AlternateDBusNamesMetaclass
2375
mandos_dbus_service = MandosDBusServiceTransitional()
2376
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
3504
mandos_dbus_service = MandosDBusService()
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
2377
3511
def cleanup():
2378
3512
"Cleanup function; run on exit"
2379
service.cleanup()
2380
2381
multiprocessing.active_children()
3513
if zeroconf:
3514
service.cleanup()
3515
3516
mp.active_children()
3517
wn.close()
2382
3518
if not (tcp_server.clients or client_settings):
2383
3519
return
2384
3520
2385
3521
# Store client before exiting. Secrets are encrypted with key
2386
3522
# based on what config file has. If config file is
2387
3523
# removed/edited, old secret will thus be unrecovable.
2388
3524
clients = {}
2389
3525
with PGPEngine() as pgp:
2390
for client in tcp_server.clients.itervalues():
3526
for client in tcp_server.clients.values():
2391
3527
key = client_settings[client.name]["secret"]
2392
3528
client.encrypted_secret = pgp.encrypt(client.secret,
2393
3529
key)
2394
3530
client_dict = {}
2395
3531
2396
3532
# A list of attributes that can not be pickled
2397
3533
# + secret.
2398
exclude = set(("bus", "changedstate", "secret",
2399
"checker"))
2400
for name, typ in (inspect.getmembers
2401
(dbus.service.Object)):
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
3537
.Object):
2402
3538
exclude.add(name)
2403
3539
2404
3540
client_dict["encrypted_secret"] = (client
2405
3541
.encrypted_secret)
2406
3542
for attr in client.client_structure:
2407
3543
if attr not in exclude:
2408
3544
client_dict[attr] = getattr(client, attr)
2409
3545
2410
3546
clients[client.name] = client_dict
2411
3547
del client_settings[client.name]["secret"]
2412
3548
2413
3549
try:
2414
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2415
prefix="clients-",
2416
dir=os.path.dirname
2417
(stored_state_path))
2418
with os.fdopen(tempfd, "wb") as stored_state:
2419
pickle.dump((clients, client_settings), stored_state)
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
2420
3559
os.rename(tempname, stored_state_path)
2421
3560
except (IOError, OSError) as e:
2422
logger.warning("Could not save persistent state: {0}"
2423
.format(e))
2424
3561
if not debug:
2425
3562
try:
2426
3563
os.remove(tempname)
2427
3564
except NameError:
2428
3565
pass
2429
if e.errno not in set((errno.ENOENT, errno.EACCES,
2430
errno.EEXIST)):
2431
raise e
2432
3566
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3567
logger.warning("Could not save persistent state: {}"
3568
.format(os.strerror(e.errno)))
3569
else:
3570
logger.warning("Could not save persistent state:",
3571
exc_info=e)
3572
raise
3573
2433
3574
# Delete all clients, and settings from config
2434
3575
while tcp_server.clients:
2435
3576
name, client = tcp_server.clients.popitem()
2436
3577
if use_dbus:
2437
3578
client.remove_from_connection()
2438
# Don't signal anything except ClientRemoved
3579
# Don't signal the disabling
2439
3580
client.disable(quiet=True)
3581
# Emit D-Bus signal for removal
2440
3582
if use_dbus:
2441
# Emit D-Bus signal
2442
mandos_dbus_service.ClientRemoved(client
2443
.dbus_object_path,
2444
client.name)
3583
mandos_dbus_service.client_removed_signal(client)
2445
3584
client_settings.clear()
2446
3585
2447
3586
atexit.register(cleanup)
2448
2449
for client in tcp_server.clients.itervalues():
3587
3588
for client in tcp_server.clients.values():
2450
3589
if use_dbus:
2451
# Emit D-Bus signal
2452
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3590
# Emit D-Bus signal for adding
3591
mandos_dbus_service.client_added_signal(client)
2453
3592
# Need to initiate checking of clients
2454
3593
if client.enabled:
2455
3594
client.init_checker()
2456
3595
2457
3596
tcp_server.enable()
2458
3597
tcp_server.server_activate()
2459
3598
2460
3599
# Find out what port we got
2461
service.port = tcp_server.socket.getsockname()[1]
3600
if zeroconf:
3601
service.port = tcp_server.socket.getsockname()[1]
2462
3602
if use_ipv6:
2463
3603
logger.info("Now listening on address %r, port %d,"
2464
" flowinfo %d, scope_id %d"
2465
% tcp_server.socket.getsockname())
3604
" flowinfo %d, scope_id %d",
3605
*tcp_server.socket.getsockname())
2466
3606
else: # IPv4
2467
logger.info("Now listening on address %r, port %d"
2468
% tcp_server.socket.getsockname())
2469
2470
#service.interface = tcp_server.socket.getsockname()[3]
2471
3607
logger.info("Now listening on address %r, port %d",
3608
*tcp_server.socket.getsockname())
3609
3610
# service.interface = tcp_server.socket.getsockname()[3]
3611
2472
3612
try:
2473
# From the Avahi example code
2474
try:
2475
service.activate()
2476
except dbus.exceptions.DBusException as error:
2477
logger.critical("DBusException: %s", error)
2478
cleanup()
2479
sys.exit(1)
2480
# End of Avahi example code
2481
2482
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2483
lambda *args, **kwargs:
2484
(tcp_server.handle_request
2485
(*args[2:], **kwargs) or True))
2486
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
2487
3629
logger.debug("Starting main loop")
2488
3630
main_loop.run()
2489
3631
except AvahiError as error:
2490
logger.critical("AvahiError: %s", error)
3632
logger.critical("Avahi Error", exc_info=error)
2491
3633
cleanup()
2492
3634
sys.exit(1)
2493
3635
except KeyboardInterrupt:
2498
3640
# Must run before the D-Bus bus name gets deregistered
2499
3641
cleanup()
2500
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
2501
3660
if __name__ == '__main__':
2502
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