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- Committer: Teddy Hogeborn
- Date: 2019-08-05 21:03:31 UTC
- Revision ID: teddy@recompile.se-20190805210331-vut4mdrc129c6ycs
Override lintian warning about old debhelper format
* debian/source/lintian-overrides
(package-uses-old-debhelper-compat-version): New; set to "10".
* debian/source/lintian-overrides
(package-uses-old-debhelper-compat-version): New; set to "10".
- 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
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
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# 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
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# 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
68
77
import itertools
78
import collections
79
import codecs
69
80
70
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import dbus
71
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import dbus.service
72
import gobject
73
import avahi
83
import gi
84
from gi.repository import GLib
74
85
from dbus.mainloop.glib import DBusGMainLoop
75
86
import ctypes
76
87
import ctypes.util
77
88
import xml.dom.minidom
78
89
import inspect
79
import GnuPGInterface
80
90
91
# Try to find the value of SO_BINDTODEVICE:
81
92
try:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
82
95
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
83
96
except AttributeError:
84
97
try:
98
# This is where SO_BINDTODEVICE was up to and including Python
99
# 2.6, and also 3.2:
85
100
from IN import SO_BINDTODEVICE
86
101
except ImportError:
87
SO_BINDTODEVICE = None
88
89
version = "1.5.3"
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
104
try:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
"/dev/stdin"],
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
113
# No value found
114
SO_BINDTODEVICE = None
115
116
if sys.version_info.major == 2:
117
str = unicode
118
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
121
122
version = "1.8.6"
90
123
stored_state_file = "clients.pickle"
91
124
92
125
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
126
syslogger = None
96
127
97
128
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
101
131
except (OSError, AttributeError):
132
102
133
def if_nametoindex(interface):
103
134
"Get an interface index the hard way, i.e. using fcntl()"
104
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
136
with contextlib.closing(socket.socket()) as s:
106
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
111
140
return interface_index
112
141
113
142
143
def copy_function(func):
144
"""Make a copy of a function"""
145
if sys.version_info.major == 2:
146
return types.FunctionType(func.func_code,
147
func.func_globals,
148
func.func_name,
149
func.func_defaults,
150
func.func_closure)
151
else:
152
return types.FunctionType(func.__code__,
153
func.__globals__,
154
func.__name__,
155
func.__defaults__,
156
func.__closure__)
157
158
114
159
def initlogger(debug, level=logging.WARNING):
115
160
"""init logger and add loglevel"""
116
161
162
global syslogger
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
165
address="/dev/log"))
117
166
syslogger.setFormatter(logging.Formatter
118
167
('Mandos [%(process)d]: %(levelname)s:'
119
168
' %(message)s'))
120
169
logger.addHandler(syslogger)
121
170
122
171
if debug:
123
172
console = logging.StreamHandler()
124
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
136
185
137
186
class PGPEngine(object):
138
187
"""A simple class for OpenPGP symmetric encryption & decryption"""
188
139
189
def __init__(self):
140
self.gnupg = GnuPGInterface.GnuPG()
141
190
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
142
self.gnupg = GnuPGInterface.GnuPG()
143
self.gnupg.options.meta_interactive = False
144
self.gnupg.options.homedir = self.tempdir
145
self.gnupg.options.extra_args.extend(['--force-mdc',
146
'--quiet',
147
'--no-use-agent'])
148
191
self.gpg = "gpg"
192
try:
193
output = subprocess.check_output(["gpgconf"])
194
for line in output.splitlines():
195
name, text, path = line.split(b":")
196
if name == "gpg":
197
self.gpg = path
198
break
199
except OSError as e:
200
if e.errno != errno.ENOENT:
201
raise
202
self.gnupgargs = ['--batch',
203
'--homedir', self.tempdir,
204
'--force-mdc',
205
'--quiet']
206
# Only GPG version 1 has the --no-use-agent option.
207
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
208
self.gnupgargs.append("--no-use-agent")
209
149
210
def __enter__(self):
150
211
return self
151
152
def __exit__ (self, exc_type, exc_value, traceback):
212
213
def __exit__(self, exc_type, exc_value, traceback):
153
214
self._cleanup()
154
215
return False
155
216
156
217
def __del__(self):
157
218
self._cleanup()
158
219
159
220
def _cleanup(self):
160
221
if self.tempdir is not None:
161
222
# Delete contents of tempdir
162
223
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
224
topdown=False):
164
225
for filename in files:
165
226
os.remove(os.path.join(root, filename))
166
227
for dirname in dirs:
168
229
# Remove tempdir
169
230
os.rmdir(self.tempdir)
170
231
self.tempdir = None
171
232
172
233
def password_encode(self, password):
173
234
# Passphrase can not be empty and can not contain newlines or
174
235
# NUL bytes. So we prefix it and hex encode it.
175
return b"mandos" + binascii.hexlify(password)
176
236
encoded = b"mandos" + binascii.hexlify(password)
237
if len(encoded) > 2048:
238
# GnuPG can't handle long passwords, so encode differently
239
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
240
.replace(b"\n", b"\\n")
241
.replace(b"\0", b"\\x00"))
242
return encoded
243
177
244
def encrypt(self, data, password):
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
180
try:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
185
f.write(data)
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
188
proc.wait()
189
except IOError as e:
190
raise PGPError(e)
191
self.gnupg.passphrase = None
245
passphrase = self.password_encode(password)
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
248
passfile.write(passphrase)
249
passfile.flush()
250
proc = subprocess.Popen([self.gpg, '--symmetric',
251
'--passphrase-file',
252
passfile.name]
253
+ self.gnupgargs,
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
258
if proc.returncode != 0:
259
raise PGPError(err)
192
260
return ciphertext
193
261
194
262
def decrypt(self, data, password):
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
197
try:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
202
f.write(data)
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
205
proc.wait()
206
except IOError as e:
207
raise PGPError(e)
208
self.gnupg.passphrase = None
263
passphrase = self.password_encode(password)
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
266
passfile.write(passphrase)
267
passfile.flush()
268
proc = subprocess.Popen([self.gpg, '--decrypt',
269
'--passphrase-file',
270
passfile.name]
271
+ self.gnupgargs,
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
276
if proc.returncode != 0:
277
raise PGPError(err)
209
278
return decrypted_plaintext
210
279
211
280
281
# Pretend that we have an Avahi module
282
class avahi(object):
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
292
293
@staticmethod
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
305
306
212
307
class AvahiError(Exception):
213
308
def __init__(self, value, *args, **kwargs):
214
309
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
310
return super(AvahiError, self).__init__(value, *args,
311
**kwargs)
312
218
313
219
314
class AvahiServiceError(AvahiError):
220
315
pass
221
316
317
222
318
class AvahiGroupError(AvahiError):
223
319
pass
224
320
225
321
226
322
class AvahiService(object):
227
323
"""An Avahi (Zeroconf) service.
228
324
229
325
Attributes:
230
326
interface: integer; avahi.IF_UNSPEC or an interface index.
231
327
Used to optionally bind to the specified interface.
232
328
name: string; Example: 'Mandos'
233
329
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
330
See <https://www.iana.org/assignments/service-names-port-numbers>
235
331
port: integer; what port to announce
236
332
TXT: list of strings; TXT record for the service
237
333
domain: string; Domain to publish on, default to .local if empty.
243
339
server: D-Bus Server
244
340
bus: dbus.SystemBus()
245
341
"""
246
247
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
248
servicetype = None, port = None, TXT = None,
249
domain = "", host = "", max_renames = 32768,
250
protocol = avahi.PROTO_UNSPEC, bus = None):
342
343
def __init__(self,
344
interface=avahi.IF_UNSPEC,
345
name=None,
346
servicetype=None,
347
port=None,
348
TXT=None,
349
domain="",
350
host="",
351
max_renames=32768,
352
protocol=avahi.PROTO_UNSPEC,
353
bus=None):
251
354
self.interface = interface
252
355
self.name = name
253
356
self.type = servicetype
262
365
self.server = None
263
366
self.bus = bus
264
367
self.entry_group_state_changed_match = None
265
266
def rename(self):
368
369
def rename(self, remove=True):
267
370
"""Derived from the Avahi example code"""
268
371
if self.rename_count >= self.max_renames:
269
372
logger.critical("No suitable Zeroconf service name found"
270
373
" after %i retries, exiting.",
271
374
self.rename_count)
272
375
raise AvahiServiceError("Too many renames")
273
self.name = unicode(self.server
274
.GetAlternativeServiceName(self.name))
376
self.name = str(
377
self.server.GetAlternativeServiceName(self.name))
378
self.rename_count += 1
275
379
logger.info("Changing Zeroconf service name to %r ...",
276
380
self.name)
277
self.remove()
381
if remove:
382
self.remove()
278
383
try:
279
384
self.add()
280
385
except dbus.exceptions.DBusException as error:
281
logger.critical("D-Bus Exception", exc_info=error)
282
self.cleanup()
283
os._exit(1)
284
self.rename_count += 1
285
386
if (error.get_dbus_name()
387
== "org.freedesktop.Avahi.CollisionError"):
388
logger.info("Local Zeroconf service name collision.")
389
return self.rename(remove=False)
390
else:
391
logger.critical("D-Bus Exception", exc_info=error)
392
self.cleanup()
393
os._exit(1)
394
286
395
def remove(self):
287
396
"""Derived from the Avahi example code"""
288
397
if self.entry_group_state_changed_match is not None:
290
399
self.entry_group_state_changed_match = None
291
400
if self.group is not None:
292
401
self.group.Reset()
293
402
294
403
def add(self):
295
404
"""Derived from the Avahi example code"""
296
405
self.remove()
313
422
dbus.UInt16(self.port),
314
423
avahi.string_array_to_txt_array(self.TXT))
315
424
self.group.Commit()
316
425
317
426
def entry_group_state_changed(self, state, error):
318
427
"""Derived from the Avahi example code"""
319
428
logger.debug("Avahi entry group state change: %i", state)
320
429
321
430
if state == avahi.ENTRY_GROUP_ESTABLISHED:
322
431
logger.debug("Zeroconf service established.")
323
432
elif state == avahi.ENTRY_GROUP_COLLISION:
325
434
self.rename()
326
435
elif state == avahi.ENTRY_GROUP_FAILURE:
327
436
logger.critical("Avahi: Error in group state changed %s",
328
unicode(error))
329
raise AvahiGroupError("State changed: {0!s}"
330
.format(error))
331
437
str(error))
438
raise AvahiGroupError("State changed: {!s}".format(error))
439
332
440
def cleanup(self):
333
441
"""Derived from the Avahi example code"""
334
442
if self.group is not None:
339
447
pass
340
448
self.group = None
341
449
self.remove()
342
450
343
451
def server_state_changed(self, state, error=None):
344
452
"""Derived from the Avahi example code"""
345
453
logger.debug("Avahi server state change: %i", state)
346
bad_states = { avahi.SERVER_INVALID:
347
"Zeroconf server invalid",
348
avahi.SERVER_REGISTERING: None,
349
avahi.SERVER_COLLISION:
350
"Zeroconf server name collision",
351
avahi.SERVER_FAILURE:
352
"Zeroconf server failure" }
454
bad_states = {
455
avahi.SERVER_INVALID: "Zeroconf server invalid",
456
avahi.SERVER_REGISTERING: None,
457
avahi.SERVER_COLLISION: "Zeroconf server name collision",
458
avahi.SERVER_FAILURE: "Zeroconf server failure",
459
}
353
460
if state in bad_states:
354
461
if bad_states[state] is not None:
355
462
if error is None:
358
465
logger.error(bad_states[state] + ": %r", error)
359
466
self.cleanup()
360
467
elif state == avahi.SERVER_RUNNING:
361
self.add()
468
try:
469
self.add()
470
except dbus.exceptions.DBusException as error:
471
if (error.get_dbus_name()
472
== "org.freedesktop.Avahi.CollisionError"):
473
logger.info("Local Zeroconf service name"
474
" collision.")
475
return self.rename(remove=False)
476
else:
477
logger.critical("D-Bus Exception", exc_info=error)
478
self.cleanup()
479
os._exit(1)
362
480
else:
363
481
if error is None:
364
482
logger.debug("Unknown state: %r", state)
365
483
else:
366
484
logger.debug("Unknown state: %r: %r", state, error)
367
485
368
486
def activate(self):
369
487
"""Derived from the Avahi example code"""
370
488
if self.server is None:
374
492
follow_name_owner_changes=True),
375
493
avahi.DBUS_INTERFACE_SERVER)
376
494
self.server.connect_to_signal("StateChanged",
377
self.server_state_changed)
495
self.server_state_changed)
378
496
self.server_state_changed(self.server.GetState())
379
497
498
380
499
class AvahiServiceToSyslog(AvahiService):
381
def rename(self):
500
def rename(self, *args, **kwargs):
382
501
"""Add the new name to the syslog messages"""
383
ret = AvahiService.rename(self)
384
syslogger.setFormatter(logging.Formatter
385
('Mandos ({0}) [%(process)d]:'
386
' %(levelname)s: %(message)s'
387
.format(self.name)))
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
505
.format(self.name)))
388
506
return ret
389
507
390
def timedelta_to_milliseconds(td):
391
"Convert a datetime.timedelta() to milliseconds"
392
return ((td.days * 24 * 60 * 60 * 1000)
393
+ (td.seconds * 1000)
394
+ (td.microseconds // 1000))
508
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
512
513
library = ctypes.util.find_library("gnutls")
514
if library is None:
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
517
del library
518
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
521
522
# Constants
523
E_SUCCESS = 0
524
E_INTERRUPTED = -52
525
E_AGAIN = -28
526
CRT_OPENPGP = 2
527
CRT_RAWPK = 3
528
CLIENT = 2
529
SHUT_RDWR = 0
530
CRD_CERTIFICATE = 1
531
E_NO_CERTIFICATE_FOUND = -49
532
X509_FMT_DER = 0
533
NO_TICKETS = 1<<10
534
ENABLE_RAWPK = 1<<18
535
CTYPE_PEERS = 3
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
568
# gnutls.strerror()
569
self.code = code
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
573
message, *args)
574
575
class CertificateSecurityError(Error):
576
pass
577
578
# Classes
579
class Credentials(object):
580
def __init__(self):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
585
586
def __del__(self):
587
gnutls.certificate_free_credentials(self._c_object)
588
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
595
if gnutls.has_rawpk:
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
598
del gnutls_flags
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
602
True)
603
self.socket = socket
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
608
ctypes.c_void_p))
609
self.credentials = credentials
610
611
def __del__(self):
612
gnutls.deinit(self._c_object)
613
614
def handshake(self):
615
return gnutls.handshake(self._c_object)
616
617
def send(self, data):
618
data = bytes(data)
619
data_len = len(data)
620
while data_len > 0:
621
data_len -= gnutls.record_send(self._c_object,
622
data[-data_len:],
623
data_len)
624
625
def bye(self):
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
627
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
632
if result >= 0:
633
return result
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
637
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
641
while result < 0:
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
645
return result
646
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
649
650
# Functions
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
655
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
659
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
663
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
666
ctypes.c_size_t]
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
669
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
675
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
681
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
685
ctypes.c_int]
686
handshake_set_private_extensions.restype = None
687
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
690
ctypes.c_void_p]
691
credentials_set.restype = _error_code
692
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
696
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
700
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
705
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
709
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
713
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
717
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
722
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
726
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
731
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
735
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
740
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
743
744
if has_rawpk:
745
# Types
746
class pubkey_st(ctypes.Structure):
747
_fields = []
748
pubkey_t = ctypes.POINTER(pubkey_st)
749
750
x509_crt_fmt_t = ctypes.c_int
751
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
756
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
759
x509_crt_fmt_t]
760
pubkey_import.restype = _error_code
761
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
767
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
771
else:
772
# All the function declarations below are from gnutls/openpgp.h
773
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
777
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
781
openpgp_crt_fmt_t]
782
openpgp_crt_import.restype = _error_code
783
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
788
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
792
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
796
ctypes.c_void_p,
797
ctypes.POINTER(
798
ctypes.c_size_t)]
799
openpgp_crt_get_fingerprint.restype = _error_code
800
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
805
806
# Remove non-public functions
807
del _error_code, _retry_on_error
808
809
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
813
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
816
"""
817
connection.send(func(*args, **kwargs))
818
connection.close()
819
395
820
396
821
class Client(object):
397
822
"""A representation of a client host served by this server.
398
823
399
824
Attributes:
400
825
approved: bool(); 'None' if not yet approved/disapproved
401
826
approval_delay: datetime.timedelta(); Time to wait for approval
402
827
approval_duration: datetime.timedelta(); Duration of one approval
403
checker: subprocess.Popen(); a running checker process used
404
to see if the client lives.
405
'None' if no process is running.
406
checker_callback_tag: a gobject event source tag, or None
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
830
running.
831
checker_callback_tag: a GLib event source tag, or None
407
832
checker_command: string; External command which is run to check
408
833
if client lives. %() expansions are done at
409
834
runtime with vars(self) as dict, so that for
410
835
instance %(name)s can be used in the command.
411
checker_initiator_tag: a gobject event source tag, or None
836
checker_initiator_tag: a GLib event source tag, or None
412
837
created: datetime.datetime(); (UTC) object creation
413
838
client_structure: Object describing what attributes a client has
414
839
and is used for storing the client at exit
415
840
current_checker_command: string; current running checker_command
416
disable_initiator_tag: a gobject event source tag, or None
841
disable_initiator_tag: a GLib event source tag, or None
417
842
enabled: bool()
418
843
fingerprint: string (40 or 32 hexadecimal digits); used to
419
uniquely identify the client
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
420
847
host: string; available for use by the checker command
421
848
interval: datetime.timedelta(); How often to start a new checker
422
849
last_approval_request: datetime.datetime(); (UTC) or None
424
851
last_checker_status: integer between 0 and 255 reflecting exit
425
852
status of last checker. -1 reflects crashed
426
853
checker, -2 means no checker completed yet.
854
last_checker_signal: The signal which killed the last checker, if
855
last_checker_status is -1
427
856
last_enabled: datetime.datetime(); (UTC) or None
428
857
name: string; from the config file, used in log messages and
429
858
D-Bus identifiers
434
863
runtime_expansions: Allowed attributes for runtime expansion.
435
864
expires: datetime.datetime(); time (UTC) when a client will be
436
865
disabled, or None
866
server_settings: The server_settings dict from main()
437
867
"""
438
868
439
869
runtime_expansions = ("approval_delay", "approval_duration",
440
"created", "enabled", "fingerprint",
441
"host", "interval", "last_checked_ok",
870
"created", "enabled", "expires", "key_id",
871
"fingerprint", "host", "interval",
872
"last_approval_request", "last_checked_ok",
442
873
"last_enabled", "name", "timeout")
443
client_defaults = { "timeout": "5m",
444
"extended_timeout": "15m",
445
"interval": "2m",
446
"checker": "fping -q -- %%(host)s",
447
"host": "",
448
"approval_delay": "0s",
449
"approval_duration": "1s",
450
"approved_by_default": "True",
451
"enabled": "True",
452
}
453
454
def timeout_milliseconds(self):
455
"Return the 'timeout' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.timeout)
457
458
def extended_timeout_milliseconds(self):
459
"Return the 'extended_timeout' attribute in milliseconds"
460
return timedelta_to_milliseconds(self.extended_timeout)
461
462
def interval_milliseconds(self):
463
"Return the 'interval' attribute in milliseconds"
464
return timedelta_to_milliseconds(self.interval)
465
466
def approval_delay_milliseconds(self):
467
return timedelta_to_milliseconds(self.approval_delay)
468
874
client_defaults = {
875
"timeout": "PT5M",
876
"extended_timeout": "PT15M",
877
"interval": "PT2M",
878
"checker": "fping -q -- %%(host)s",
879
"host": "",
880
"approval_delay": "PT0S",
881
"approval_duration": "PT1S",
882
"approved_by_default": "True",
883
"enabled": "True",
884
}
885
469
886
@staticmethod
470
887
def config_parser(config):
471
888
"""Construct a new dict of client settings of this form:
478
895
for client_name in config.sections():
479
896
section = dict(config.items(client_name))
480
897
client = settings[client_name] = {}
481
898
482
899
client["host"] = section["host"]
483
900
# Reformat values from string types to Python types
484
901
client["approved_by_default"] = config.getboolean(
485
902
client_name, "approved_by_default")
486
903
client["enabled"] = config.getboolean(client_name,
487
904
"enabled")
488
905
906
# Uppercase and remove spaces from key_id and fingerprint
907
# for later comparison purposes with return value from the
908
# key_id() and fingerprint() functions
909
client["key_id"] = (section.get("key_id", "").upper()
910
.replace(" ", ""))
489
911
client["fingerprint"] = (section["fingerprint"].upper()
490
912
.replace(" ", ""))
491
913
if "secret" in section:
492
client["secret"] = section["secret"].decode("base64")
914
client["secret"] = codecs.decode(section["secret"]
915
.encode("utf-8"),
916
"base64")
493
917
elif "secfile" in section:
494
918
with open(os.path.expanduser(os.path.expandvars
495
919
(section["secfile"])),
496
920
"rb") as secfile:
497
921
client["secret"] = secfile.read()
498
922
else:
499
raise TypeError("No secret or secfile for section {0}"
923
raise TypeError("No secret or secfile for section {}"
500
924
.format(section))
501
925
client["timeout"] = string_to_delta(section["timeout"])
502
926
client["extended_timeout"] = string_to_delta(
510
934
client["last_approval_request"] = None
511
935
client["last_checked_ok"] = None
512
936
client["last_checker_status"] = -2
513
937
514
938
return settings
515
516
def __init__(self, settings, name = None):
939
940
def __init__(self, settings, name=None, server_settings=None):
517
941
self.name = name
942
if server_settings is None:
943
server_settings = {}
944
self.server_settings = server_settings
518
945
# adding all client settings
519
for setting, value in settings.iteritems():
946
for setting, value in settings.items():
520
947
setattr(self, setting, value)
521
948
522
949
if self.enabled:
523
950
if not hasattr(self, "last_enabled"):
524
951
self.last_enabled = datetime.datetime.utcnow()
528
955
else:
529
956
self.last_enabled = None
530
957
self.expires = None
531
958
532
959
logger.debug("Creating client %r", self.name)
533
# Uppercase and remove spaces from fingerprint for later
534
# comparison purposes with return value from the fingerprint()
535
# function
960
logger.debug(" Key ID: %s", self.key_id)
536
961
logger.debug(" Fingerprint: %s", self.fingerprint)
537
962
self.created = settings.get("created",
538
963
datetime.datetime.utcnow())
539
964
540
965
# attributes specific for this server instance
541
966
self.checker = None
542
967
self.checker_initiator_tag = None
545
970
self.current_checker_command = None
546
971
self.approved = None
547
972
self.approvals_pending = 0
548
self.changedstate = (multiprocessing_manager
549
.Condition(multiprocessing_manager
550
.Lock()))
551
self.client_structure = [attr for attr in
552
self.__dict__.iterkeys()
973
self.changedstate = multiprocessing_manager.Condition(
974
multiprocessing_manager.Lock())
975
self.client_structure = [attr
976
for attr in self.__dict__.keys()
553
977
if not attr.startswith("_")]
554
978
self.client_structure.append("client_structure")
555
556
for name, t in inspect.getmembers(type(self),
557
lambda obj:
558
isinstance(obj,
559
property)):
979
980
for name, t in inspect.getmembers(
981
type(self), lambda obj: isinstance(obj, property)):
560
982
if not name.startswith("_"):
561
983
self.client_structure.append(name)
562
984
563
985
# Send notice to process children that client state has changed
564
986
def send_changedstate(self):
565
987
with self.changedstate:
566
988
self.changedstate.notify_all()
567
989
568
990
def enable(self):
569
991
"""Start this client's checker and timeout hooks"""
570
992
if getattr(self, "enabled", False):
571
993
# Already enabled
572
994
return
573
self.send_changedstate()
574
995
self.expires = datetime.datetime.utcnow() + self.timeout
575
996
self.enabled = True
576
997
self.last_enabled = datetime.datetime.utcnow()
577
998
self.init_checker()
578
999
self.send_changedstate()
1000
579
1001
def disable(self, quiet=True):
580
1002
"""Disable this client."""
581
1003
if not getattr(self, "enabled", False):
582
1004
return False
583
1005
if not quiet:
584
self.send_changedstate()
585
if not quiet:
586
1006
logger.info("Disabling client %s", self.name)
587
if getattr(self, "disable_initiator_tag", False):
588
gobject.source_remove(self.disable_initiator_tag)
1007
if getattr(self, "disable_initiator_tag", None) is not None:
1008
GLib.source_remove(self.disable_initiator_tag)
589
1009
self.disable_initiator_tag = None
590
1010
self.expires = None
591
if getattr(self, "checker_initiator_tag", False):
592
gobject.source_remove(self.checker_initiator_tag)
1011
if getattr(self, "checker_initiator_tag", None) is not None:
1012
GLib.source_remove(self.checker_initiator_tag)
593
1013
self.checker_initiator_tag = None
594
1014
self.stop_checker()
595
1015
self.enabled = False
596
# Do not run this again if called by a gobject.timeout_add
1016
if not quiet:
1017
self.send_changedstate()
1018
# Do not run this again if called by a GLib.timeout_add
597
1019
return False
598
1020
599
1021
def __del__(self):
600
1022
self.disable()
601
1023
602
1024
def init_checker(self):
603
1025
# Schedule a new checker to be started an 'interval' from now,
604
1026
# and every interval from then on.
605
self.checker_initiator_tag = (gobject.timeout_add
606
(self.interval_milliseconds(),
607
self.start_checker))
1027
if self.checker_initiator_tag is not None:
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
1031
self.start_checker)
608
1032
# Schedule a disable() when 'timeout' has passed
609
self.disable_initiator_tag = (gobject.timeout_add
610
(self.timeout_milliseconds(),
611
self.disable))
1033
if self.disable_initiator_tag is not None:
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
612
1037
# Also start a new checker *right now*.
613
1038
self.start_checker()
614
615
def checker_callback(self, pid, condition, command):
1039
1040
def checker_callback(self, source, condition, connection,
1041
command):
616
1042
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
1045
connection.close()
1046
self.checker.join()
617
1047
self.checker_callback_tag = None
618
1048
self.checker = None
619
if os.WIFEXITED(condition):
620
self.last_checker_status = os.WEXITSTATUS(condition)
1049
1050
if returncode >= 0:
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
621
1053
if self.last_checker_status == 0:
622
1054
logger.info("Checker for %(name)s succeeded",
623
1055
vars(self))
624
1056
self.checked_ok()
625
1057
else:
626
logger.info("Checker for %(name)s failed",
627
vars(self))
1058
logger.info("Checker for %(name)s failed", vars(self))
628
1059
else:
629
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
630
1062
logger.warning("Checker for %(name)s crashed?",
631
1063
vars(self))
632
1064
return False
1065
633
1066
def checked_ok(self):
634
1067
"""Assert that the client has been seen, alive and well."""
635
1068
self.last_checked_ok = datetime.datetime.utcnow()
636
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
637
1071
self.bump_timeout()
638
1072
639
1073
def bump_timeout(self, timeout=None):
640
1074
"""Bump up the timeout for this client."""
641
1075
if timeout is None:
642
1076
timeout = self.timeout
643
1077
if self.disable_initiator_tag is not None:
644
gobject.source_remove(self.disable_initiator_tag)
1078
GLib.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
645
1080
if getattr(self, "enabled", False):
646
self.disable_initiator_tag = (gobject.timeout_add
647
(timedelta_to_milliseconds
648
(timeout), self.disable))
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
649
1083
self.expires = datetime.datetime.utcnow() + timeout
650
1084
651
1085
def need_approval(self):
652
1086
self.last_approval_request = datetime.datetime.utcnow()
653
1087
654
1088
def start_checker(self):
655
1089
"""Start a new checker subprocess if one is not running.
656
1090
657
1091
If a checker already exists, leave it running and do
658
1092
nothing."""
659
1093
# The reason for not killing a running checker is that if we
660
# did that, then if a checker (for some reason) started
661
# running slowly and taking more than 'interval' time, the
662
# client would inevitably timeout, since no checker would get
663
# a chance to run to completion. If we instead leave running
1094
# did that, and if a checker (for some reason) started running
1095
# slowly and taking more than 'interval' time, then the client
1096
# would inevitably timeout, since no checker would get a
1097
# chance to run to completion. If we instead leave running
664
1098
# checkers alone, the checker would have to take more time
665
1099
# than 'timeout' for the client to be disabled, which is as it
666
1100
# should be.
667
668
# If a checker exists, make sure it is not a zombie
669
try:
670
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
671
except (AttributeError, OSError) as error:
672
if (isinstance(error, OSError)
673
and error.errno != errno.ECHILD):
674
raise error
675
else:
676
if pid:
677
logger.warning("Checker was a zombie")
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status,
680
self.current_checker_command)
1101
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
1104
self.checker.join()
1105
self.checker = None
681
1106
# Start a new checker if needed
682
1107
if self.checker is None:
1108
# Escape attributes for the shell
1109
escaped_attrs = {
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
683
1112
try:
684
# In case checker_command has exactly one % operator
685
command = self.checker_command % self.host
686
except TypeError:
687
# Escape attributes for the shell
688
escaped_attrs = dict(
689
(attr,
690
re.escape(unicode(str(getattr(self, attr, "")),
691
errors=
692
'replace')))
693
for attr in
694
self.runtime_expansions)
695
696
try:
697
command = self.checker_command % escaped_attrs
698
except TypeError as error:
699
logger.error('Could not format string "%s"',
700
self.checker_command, exc_info=error)
701
return True # Try again later
1113
command = self.checker_command % escaped_attrs
1114
except TypeError as error:
1115
logger.error('Could not format string "%s"',
1116
self.checker_command,
1117
exc_info=error)
1118
return True # Try again later
702
1119
self.current_checker_command = command
703
try:
704
logger.info("Starting checker %r for %s",
705
command, self.name)
706
# We don't need to redirect stdout and stderr, since
707
# in normal mode, that is already done by daemon(),
708
# and in debug mode we don't want to. (Stdin is
709
# always replaced by /dev/null.)
710
self.checker = subprocess.Popen(command,
711
close_fds=True,
712
shell=True, cwd="/")
713
self.checker_callback_tag = (gobject.child_watch_add
714
(self.checker.pid,
715
self.checker_callback,
716
data=command))
717
# The checker may have completed before the gobject
718
# watch was added. Check for this.
719
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
720
if pid:
721
gobject.source_remove(self.checker_callback_tag)
722
self.checker_callback(pid, status, command)
723
except OSError as error:
724
logger.error("Failed to start subprocess",
725
exc_info=error)
726
# Re-run this periodically if run by gobject.timeout_add
1120
logger.info("Starting checker %r for %s", command,
1121
self.name)
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1128
# created wnull.
1129
popen_args = {"close_fds": True,
1130
"shell": True,
1131
"cwd": "/"}
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1135
"stderr": wnull})
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1138
target=call_pipe,
1139
args=(pipe[1], subprocess.call, command),
1140
kwargs=popen_args)
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
727
1146
return True
728
1147
729
1148
def stop_checker(self):
730
1149
"""Force the checker process, if any, to stop."""
731
1150
if self.checker_callback_tag:
732
gobject.source_remove(self.checker_callback_tag)
1151
GLib.source_remove(self.checker_callback_tag)
733
1152
self.checker_callback_tag = None
734
1153
if getattr(self, "checker", None) is None:
735
1154
return
736
1155
logger.debug("Stopping checker for %(name)s", vars(self))
737
try:
738
self.checker.terminate()
739
#time.sleep(0.5)
740
#if self.checker.poll() is None:
741
# self.checker.kill()
742
except OSError as error:
743
if error.errno != errno.ESRCH: # No such process
744
raise
1156
self.checker.terminate()
745
1157
self.checker = None
746
1158
747
1159
748
def dbus_service_property(dbus_interface, signature="v",
749
access="readwrite", byte_arrays=False):
1160
def dbus_service_property(dbus_interface,
1161
signature="v",
1162
access="readwrite",
1163
byte_arrays=False):
750
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
751
1165
become properties on the D-Bus.
752
1166
753
1167
The decorated method will be called with no arguments by "Get"
754
1168
and with one argument by "Set".
755
1169
756
1170
The parameters, where they are supported, are the same as
757
1171
dbus.service.method, except there is only "signature", since the
758
1172
type from Get() and the type sent to Set() is the same.
761
1175
# "Set" method, so we fail early here:
762
1176
if byte_arrays and signature != "ay":
763
1177
raise ValueError("Byte arrays not supported for non-'ay'"
764
" signature {0!r}".format(signature))
1178
" signature {!r}".format(signature))
1179
765
1180
def decorator(func):
766
1181
func._dbus_is_property = True
767
1182
func._dbus_interface = dbus_interface
770
1185
func._dbus_name = func.__name__
771
1186
if func._dbus_name.endswith("_dbus_property"):
772
1187
func._dbus_name = func._dbus_name[:-14]
773
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1188
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
774
1189
return func
1190
775
1191
return decorator
776
1192
777
1193
778
1194
def dbus_interface_annotations(dbus_interface):
779
1195
"""Decorator for marking functions returning interface annotations
780
1196
781
1197
Usage:
782
1198
783
1199
@dbus_interface_annotations("org.example.Interface")
784
1200
def _foo(self): # Function name does not matter
785
1201
return {"org.freedesktop.DBus.Deprecated": "true",
786
1202
"org.freedesktop.DBus.Property.EmitsChangedSignal":
787
1203
"false"}
788
1204
"""
1205
789
1206
def decorator(func):
790
1207
func._dbus_is_interface = True
791
1208
func._dbus_interface = dbus_interface
792
1209
func._dbus_name = dbus_interface
793
1210
return func
1211
794
1212
return decorator
795
1213
796
1214
797
1215
def dbus_annotations(annotations):
798
1216
"""Decorator to annotate D-Bus methods, signals or properties
799
1217
Usage:
800
1218
1219
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1220
"org.freedesktop.DBus.Property."
1221
"EmitsChangedSignal": "false"})
801
1222
@dbus_service_property("org.example.Interface", signature="b",
802
1223
access="r")
803
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
804
"org.freedesktop.DBus.Property."
805
"EmitsChangedSignal": "false"})
806
1224
def Property_dbus_property(self):
807
1225
return dbus.Boolean(False)
1226
1227
See also the DBusObjectWithAnnotations class.
808
1228
"""
1229
809
1230
def decorator(func):
810
1231
func._dbus_annotations = annotations
811
1232
return func
1233
812
1234
return decorator
813
1235
814
1236
815
1237
class DBusPropertyException(dbus.exceptions.DBusException):
816
1238
"""A base class for D-Bus property-related exceptions
817
1239
"""
818
def __unicode__(self):
819
return unicode(str(self))
1240
pass
820
1241
821
1242
822
1243
class DBusPropertyAccessException(DBusPropertyException):
831
1252
pass
832
1253
833
1254
834
class DBusObjectWithProperties(dbus.service.Object):
835
"""A D-Bus object with properties.
836
837
Classes inheriting from this can use the dbus_service_property
838
decorator to expose methods as D-Bus properties. It exposes the
839
standard Get(), Set(), and GetAll() methods on the D-Bus.
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1257
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
840
1260
"""
841
1261
842
1262
@staticmethod
843
1263
def _is_dbus_thing(thing):
844
1264
"""Returns a function testing if an attribute is a D-Bus thing
845
1265
846
1266
If called like _is_dbus_thing("method") it returns a function
847
1267
suitable for use as predicate to inspect.getmembers().
848
1268
"""
849
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
850
1270
False)
851
1271
852
1272
def _get_all_dbus_things(self, thing):
853
1273
"""Returns a generator of (name, attribute) pairs
854
1274
"""
855
return ((getattr(athing.__get__(self), "_dbus_name",
856
name),
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
857
1276
athing.__get__(self))
858
1277
for cls in self.__class__.__mro__
859
1278
for name, athing in
860
inspect.getmembers(cls,
861
self._is_dbus_thing(thing)))
862
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1280
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1282
out_signature="s",
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1287
1288
Inserts annotation tags on methods and signals.
1289
"""
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1291
connection)
1292
try:
1293
document = xml.dom.minidom.parseString(xmlstring)
1294
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1299
annots = dict()
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1309
"annotation")
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1320
)).items():
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1332
== "out"):
1333
arg.setAttribute("name",
1334
"xml_data")
1335
xmlstring = document.toxml("utf-8")
1336
document.unlink()
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1340
exc_info=error)
1341
return xmlstring
1342
1343
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1345
"""A D-Bus object with properties.
1346
1347
Classes inheriting from this can use the dbus_service_property
1348
decorator to expose methods as D-Bus properties. It exposes the
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
1350
"""
1351
863
1352
def _get_dbus_property(self, interface_name, property_name):
864
1353
"""Returns a bound method if one exists which is a D-Bus
865
1354
property with the specified name and interface.
866
1355
"""
867
for cls in self.__class__.__mro__:
868
for name, value in (inspect.getmembers
869
(cls,
870
self._is_dbus_thing("property"))):
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
871
1359
if (value._dbus_name == property_name
872
1360
and value._dbus_interface == interface_name):
873
1361
return value.__get__(self)
874
1362
875
1363
# No such property
876
raise DBusPropertyNotFound(self.dbus_object_path + ":"
877
+ interface_name + "."
878
+ property_name)
879
880
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1366
1367
@classmethod
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1373
for attr in dir(x))
1374
if name is not None)
1375
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
1377
in_signature="ss",
881
1378
out_signature="v")
882
1379
def Get(self, interface_name, property_name):
883
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
889
1386
if not hasattr(value, "variant_level"):
890
1387
return value
891
1388
return type(value)(value, variant_level=value.variant_level+1)
892
1389
893
1390
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
894
1391
def Set(self, interface_name, property_name, value):
895
1392
"""Standard D-Bus property Set() method, see D-Bus standard.
901
1398
# The byte_arrays option is not supported yet on
902
1399
# signatures other than "ay".
903
1400
if prop._dbus_signature != "ay":
904
raise ValueError
1401
raise ValueError("Byte arrays not supported for non-"
1402
"'ay' signature {!r}"
1403
.format(prop._dbus_signature))
905
1404
value = dbus.ByteArray(b''.join(chr(byte)
906
1405
for byte in value))
907
1406
prop(value)
908
909
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1407
1408
@dbus.service.method(dbus.PROPERTIES_IFACE,
1409
in_signature="s",
910
1410
out_signature="a{sv}")
911
1411
def GetAll(self, interface_name):
912
1412
"""Standard D-Bus property GetAll() method, see D-Bus
913
1413
standard.
914
1414
915
1415
Note: Will not include properties with access="write".
916
1416
"""
917
1417
properties = {}
927
1427
if not hasattr(value, "variant_level"):
928
1428
properties[name] = value
929
1429
continue
930
properties[name] = type(value)(value, variant_level=
931
value.variant_level+1)
1430
properties[name] = type(value)(
1431
value, variant_level=value.variant_level + 1)
932
1432
return dbus.Dictionary(properties, signature="sv")
933
1433
1434
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1435
def PropertiesChanged(self, interface_name, changed_properties,
1436
invalidated_properties):
1437
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1438
standard.
1439
"""
1440
pass
1441
934
1442
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
935
1443
out_signature="s",
936
1444
path_keyword='object_path',
937
1445
connection_keyword='connection')
938
1446
def Introspect(self, object_path, connection):
939
1447
"""Overloading of standard D-Bus method.
940
1448
941
1449
Inserts property tags and interface annotation tags.
942
1450
"""
943
xmlstring = dbus.service.Object.Introspect(self, object_path,
944
connection)
1451
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1452
object_path,
1453
connection)
945
1454
try:
946
1455
document = xml.dom.minidom.parseString(xmlstring)
1456
947
1457
def make_tag(document, name, prop):
948
1458
e = document.createElement("property")
949
1459
e.setAttribute("name", name)
950
1460
e.setAttribute("type", prop._dbus_signature)
951
1461
e.setAttribute("access", prop._dbus_access)
952
1462
return e
1463
953
1464
for if_tag in document.getElementsByTagName("interface"):
954
1465
# Add property tags
955
1466
for tag in (make_tag(document, name, prop)
958
1469
if prop._dbus_interface
959
1470
== if_tag.getAttribute("name")):
960
1471
if_tag.appendChild(tag)
961
# Add annotation tags
962
for typ in ("method", "signal", "property"):
963
for tag in if_tag.getElementsByTagName(typ):
964
annots = dict()
965
for name, prop in (self.
966
_get_all_dbus_things(typ)):
967
if (name == tag.getAttribute("name")
968
and prop._dbus_interface
969
== if_tag.getAttribute("name")):
970
annots.update(getattr
971
(prop,
972
"_dbus_annotations",
973
{}))
974
for name, value in annots.iteritems():
975
ann_tag = document.createElement(
976
"annotation")
977
ann_tag.setAttribute("name", name)
978
ann_tag.setAttribute("value", value)
979
tag.appendChild(ann_tag)
980
# Add interface annotation tags
981
for annotation, value in dict(
982
itertools.chain(
983
*(annotations().iteritems()
984
for name, annotations in
985
self._get_all_dbus_things("interface")
986
if name == if_tag.getAttribute("name")
987
))).iteritems():
988
ann_tag = document.createElement("annotation")
989
ann_tag.setAttribute("name", annotation)
990
ann_tag.setAttribute("value", value)
991
if_tag.appendChild(ann_tag)
1472
# Add annotation tags for properties
1473
for tag in if_tag.getElementsByTagName("property"):
1474
annots = dict()
1475
for name, prop in self._get_all_dbus_things(
1476
"property"):
1477
if (name == tag.getAttribute("name")
1478
and prop._dbus_interface
1479
== if_tag.getAttribute("name")):
1480
annots.update(getattr(
1481
prop, "_dbus_annotations", {}))
1482
for name, value in annots.items():
1483
ann_tag = document.createElement(
1484
"annotation")
1485
ann_tag.setAttribute("name", name)
1486
ann_tag.setAttribute("value", value)
1487
tag.appendChild(ann_tag)
992
1488
# Add the names to the return values for the
993
1489
# "org.freedesktop.DBus.Properties" methods
994
1490
if (if_tag.getAttribute("name")
1013
1509
return xmlstring
1014
1510
1015
1511
1016
def datetime_to_dbus (dt, variant_level=0):
1512
try:
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1516
1517
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1520
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1525
1526
Note: No signals are sent automatically; they must be sent
1527
manually.
1528
"""
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1538
pass
1539
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1542
pass
1543
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1545
out_signature="s",
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1550
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1553
"""
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1555
object_path,
1556
connection)
1557
try:
1558
document = xml.dom.minidom.parseString(xmlstring)
1559
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1569
== "out"):
1570
arg.setAttribute(
1571
"name",
1572
"objpath_interfaces"
1573
"_and_properties")
1574
xmlstring = document.toxml("utf-8")
1575
document.unlink()
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1579
exc_info=error)
1580
return xmlstring
1581
1582
1583
def datetime_to_dbus(dt, variant_level=0):
1017
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1018
1585
if dt is None:
1019
return dbus.String("", variant_level = variant_level)
1020
return dbus.String(dt.isoformat(),
1021
variant_level=variant_level)
1022
1023
1024
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1025
.__metaclass__):
1026
"""Applied to an empty subclass of a D-Bus object, this metaclass
1027
will add additional D-Bus attributes matching a certain pattern.
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1588
1589
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1591
"""A class decorator; applied to a subclass of
1592
dbus.service.Object, it will add alternate D-Bus attributes with
1593
interface names according to the "alt_interface_names" mapping.
1594
Usage:
1595
1596
@alternate_dbus_interfaces({"org.example.Interface":
1597
"net.example.AlternateInterface"})
1598
class SampleDBusObject(dbus.service.Object):
1599
@dbus.service.method("org.example.Interface")
1600
def SampleDBusMethod():
1601
pass
1602
1603
The above "SampleDBusMethod" on "SampleDBusObject" will be
1604
reachable via two interfaces: "org.example.Interface" and
1605
"net.example.AlternateInterface", the latter of which will have
1606
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1607
"true", unless "deprecate" is passed with a False value.
1608
1609
This works for methods and signals, and also for D-Bus properties
1610
(from DBusObjectWithProperties) and interfaces (from the
1611
dbus_interface_annotations decorator).
1028
1612
"""
1029
def __new__(mcs, name, bases, attr):
1030
# Go through all the base classes which could have D-Bus
1031
# methods, signals, or properties in them
1032
old_interface_names = []
1033
for base in (b for b in bases
1034
if issubclass(b, dbus.service.Object)):
1035
# Go though all attributes of the base class
1036
for attrname, attribute in inspect.getmembers(base):
1613
1614
def wrapper(cls):
1615
for orig_interface_name, alt_interface_name in (
1616
alt_interface_names.items()):
1617
attr = {}
1618
interface_names = set()
1619
# Go though all attributes of the class
1620
for attrname, attribute in inspect.getmembers(cls):
1037
1621
# Ignore non-D-Bus attributes, and D-Bus attributes
1038
1622
# with the wrong interface name
1039
1623
if (not hasattr(attribute, "_dbus_interface")
1040
or not attribute._dbus_interface
1041
.startswith("se.recompile.Mandos")):
1624
or not attribute._dbus_interface.startswith(
1625
orig_interface_name)):
1042
1626
continue
1043
1627
# Create an alternate D-Bus interface name based on
1044
1628
# the current name
1045
alt_interface = (attribute._dbus_interface
1046
.replace("se.recompile.Mandos",
1047
"se.bsnet.fukt.Mandos"))
1048
if alt_interface != attribute._dbus_interface:
1049
old_interface_names.append(alt_interface)
1629
alt_interface = attribute._dbus_interface.replace(
1630
orig_interface_name, alt_interface_name)
1631
interface_names.add(alt_interface)
1050
1632
# Is this a D-Bus signal?
1051
1633
if getattr(attribute, "_dbus_is_signal", False):
1052
# Extract the original non-method function by
1053
# black magic
1054
nonmethod_func = (dict(
1634
# Extract the original non-method undecorated
1635
# function by black magic
1636
if sys.version_info.major == 2:
1637
nonmethod_func = (dict(
1055
1638
zip(attribute.func_code.co_freevars,
1056
attribute.__closure__))["func"]
1057
.cell_contents)
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
else:
1642
nonmethod_func = (dict(
1643
zip(attribute.__code__.co_freevars,
1644
attribute.__closure__))
1645
["func"].cell_contents)
1058
1646
# Create a new, but exactly alike, function
1059
1647
# object, and decorate it to be a new D-Bus signal
1060
1648
# with the alternate D-Bus interface name
1061
new_function = (dbus.service.signal
1062
(alt_interface,
1063
attribute._dbus_signature)
1064
(types.FunctionType(
1065
nonmethod_func.func_code,
1066
nonmethod_func.func_globals,
1067
nonmethod_func.func_name,
1068
nonmethod_func.func_defaults,
1069
nonmethod_func.func_closure)))
1649
new_function = copy_function(nonmethod_func)
1650
new_function = (dbus.service.signal(
1651
alt_interface,
1652
attribute._dbus_signature)(new_function))
1070
1653
# Copy annotations, if any
1071
1654
try:
1072
new_function._dbus_annotations = (
1073
dict(attribute._dbus_annotations))
1655
new_function._dbus_annotations = dict(
1656
attribute._dbus_annotations)
1074
1657
except AttributeError:
1075
1658
pass
1659
1076
1660
# Define a creator of a function to call both the
1077
# old and new functions, so both the old and new
1078
# signals gets sent when the function is called
1661
# original and alternate functions, so both the
1662
# original and alternate signals gets sent when
1663
# the function is called
1079
1664
def fixscope(func1, func2):
1080
1665
"""This function is a scope container to pass
1081
1666
func1 and func2 to the "call_both" function
1082
1667
outside of its arguments"""
1668
1669
@functools.wraps(func2)
1083
1670
def call_both(*args, **kwargs):
1084
1671
"""This function will emit two D-Bus
1085
1672
signals by calling func1 and func2"""
1086
1673
func1(*args, **kwargs)
1087
1674
func2(*args, **kwargs)
1675
# Make wrapper function look like a D-Bus
1676
# signal
1677
for name, attr in inspect.getmembers(func2):
1678
if name.startswith("_dbus_"):
1679
setattr(call_both, name, attr)
1680
1088
1681
return call_both
1089
1682
# Create the "call_both" function and add it to
1090
1683
# the class
1091
attr[attrname] = fixscope(attribute,
1092
new_function)
1684
attr[attrname] = fixscope(attribute, new_function)
1093
1685
# Is this a D-Bus method?
1094
1686
elif getattr(attribute, "_dbus_is_method", False):
1095
1687
# Create a new, but exactly alike, function
1096
1688
# object. Decorate it to be a new D-Bus method
1097
1689
# with the alternate D-Bus interface name. Add it
1098
1690
# to the class.
1099
attr[attrname] = (dbus.service.method
1100
(alt_interface,
1101
attribute._dbus_in_signature,
1102
attribute._dbus_out_signature)
1103
(types.FunctionType
1104
(attribute.func_code,
1105
attribute.func_globals,
1106
attribute.func_name,
1107
attribute.func_defaults,
1108
attribute.func_closure)))
1691
attr[attrname] = (
1692
dbus.service.method(
1693
alt_interface,
1694
attribute._dbus_in_signature,
1695
attribute._dbus_out_signature)
1696
(copy_function(attribute)))
1109
1697
# Copy annotations, if any
1110
1698
try:
1111
attr[attrname]._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1699
attr[attrname]._dbus_annotations = dict(
1700
attribute._dbus_annotations)
1113
1701
except AttributeError:
1114
1702
pass
1115
1703
# Is this a D-Bus property?
1118
1706
# object, and decorate it to be a new D-Bus
1119
1707
# property with the alternate D-Bus interface
1120
1708
# name. Add it to the class.
1121
attr[attrname] = (dbus_service_property
1122
(alt_interface,
1123
attribute._dbus_signature,
1124
attribute._dbus_access,
1125
attribute
1126
._dbus_get_args_options
1127
["byte_arrays"])
1128
(types.FunctionType
1129
(attribute.func_code,
1130
attribute.func_globals,
1131
attribute.func_name,
1132
attribute.func_defaults,
1133
attribute.func_closure)))
1709
attr[attrname] = (dbus_service_property(
1710
alt_interface, attribute._dbus_signature,
1711
attribute._dbus_access,
1712
attribute._dbus_get_args_options
1713
["byte_arrays"])
1714
(copy_function(attribute)))
1134
1715
# Copy annotations, if any
1135
1716
try:
1136
attr[attrname]._dbus_annotations = (
1137
dict(attribute._dbus_annotations))
1717
attr[attrname]._dbus_annotations = dict(
1718
attribute._dbus_annotations)
1138
1719
except AttributeError:
1139
1720
pass
1140
1721
# Is this a D-Bus interface?
1143
1724
# object. Decorate it to be a new D-Bus interface
1144
1725
# with the alternate D-Bus interface name. Add it
1145
1726
# to the class.
1146
attr[attrname] = (dbus_interface_annotations
1147
(alt_interface)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Deprecate all old interfaces
1155
iname="_AlternateDBusNamesMetaclass_interface_annotation{0}"
1156
for old_interface_name in old_interface_names:
1157
@dbus_interface_annotations(old_interface_name)
1158
def func(self):
1159
return { "org.freedesktop.DBus.Deprecated": "true" }
1160
# Find an unused name
1161
for aname in (iname.format(i) for i in itertools.count()):
1162
if aname not in attr:
1163
attr[aname] = func
1164
break
1165
return type.__new__(mcs, name, bases, attr)
1166
1167
1727
attr[attrname] = (
1728
dbus_interface_annotations(alt_interface)
1729
(copy_function(attribute)))
1730
if deprecate:
1731
# Deprecate all alternate interfaces
1732
iname = "_AlternateDBusNames_interface_annotation{}"
1733
for interface_name in interface_names:
1734
1735
@dbus_interface_annotations(interface_name)
1736
def func(self):
1737
return {"org.freedesktop.DBus.Deprecated":
1738
"true"}
1739
# Find an unused name
1740
for aname in (iname.format(i)
1741
for i in itertools.count()):
1742
if aname not in attr:
1743
attr[aname] = func
1744
break
1745
if interface_names:
1746
# Replace the class with a new subclass of it with
1747
# methods, signals, etc. as created above.
1748
if sys.version_info.major == 2:
1749
cls = type(b"{}Alternate".format(cls.__name__),
1750
(cls, ), attr)
1751
else:
1752
cls = type("{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
return cls
1755
1756
return wrapper
1757
1758
1759
@alternate_dbus_interfaces({"se.recompile.Mandos":
1760
"se.bsnet.fukt.Mandos"})
1168
1761
class ClientDBus(Client, DBusObjectWithProperties):
1169
1762
"""A Client class using D-Bus
1170
1763
1171
1764
Attributes:
1172
1765
dbus_object_path: dbus.ObjectPath
1173
1766
bus: dbus.SystemBus()
1174
1767
"""
1175
1768
1176
1769
runtime_expansions = (Client.runtime_expansions
1177
+ ("dbus_object_path",))
1178
1770
+ ("dbus_object_path", ))
1771
1772
_interface = "se.recompile.Mandos.Client"
1773
1179
1774
# dbus.service.Object doesn't use super(), so we can't either.
1180
1181
def __init__(self, bus = None, *args, **kwargs):
1775
1776
def __init__(self, bus=None, *args, **kwargs):
1182
1777
self.bus = bus
1183
1778
Client.__init__(self, *args, **kwargs)
1184
1779
# Only now, when this client is initialized, can it show up on
1185
1780
# the D-Bus
1186
client_object_name = unicode(self.name).translate(
1781
client_object_name = str(self.name).translate(
1187
1782
{ord("."): ord("_"),
1188
1783
ord("-"): ord("_")})
1189
self.dbus_object_path = (dbus.ObjectPath
1190
("/clients/" + client_object_name))
1784
self.dbus_object_path = dbus.ObjectPath(
1785
"/clients/" + client_object_name)
1191
1786
DBusObjectWithProperties.__init__(self, self.bus,
1192
1787
self.dbus_object_path)
1193
1194
def notifychangeproperty(transform_func,
1195
dbus_name, type_func=lambda x: x,
1196
variant_level=1):
1788
1789
def notifychangeproperty(transform_func, dbus_name,
1790
type_func=lambda x: x,
1791
variant_level=1,
1792
invalidate_only=False,
1793
_interface=_interface):
1197
1794
""" Modify a variable so that it's a property which announces
1198
1795
its changes to DBus.
1199
1796
1200
1797
transform_fun: Function that takes a value and a variant_level
1201
1798
and transforms it to a D-Bus type.
1202
1799
dbus_name: D-Bus name of the variable
1204
1801
to the D-Bus. Default: no transform
1205
1802
variant_level: D-Bus variant level. Default: 1
1206
1803
"""
1207
attrname = "_{0}".format(dbus_name)
1804
attrname = "_{}".format(dbus_name)
1805
1208
1806
def setter(self, value):
1209
1807
if hasattr(self, "dbus_object_path"):
1210
1808
if (not hasattr(self, attrname) or
1211
1809
type_func(getattr(self, attrname, None))
1212
1810
!= type_func(value)):
1213
dbus_value = transform_func(type_func(value),
1214
variant_level
1215
=variant_level)
1216
self.PropertyChanged(dbus.String(dbus_name),
1217
dbus_value)
1811
if invalidate_only:
1812
self.PropertiesChanged(
1813
_interface, dbus.Dictionary(),
1814
dbus.Array((dbus_name, )))
1815
else:
1816
dbus_value = transform_func(
1817
type_func(value),
1818
variant_level=variant_level)
1819
self.PropertyChanged(dbus.String(dbus_name),
1820
dbus_value)
1821
self.PropertiesChanged(
1822
_interface,
1823
dbus.Dictionary({dbus.String(dbus_name):
1824
dbus_value}),
1825
dbus.Array())
1218
1826
setattr(self, attrname, value)
1219
1827
1220
1828
return property(lambda self: getattr(self, attrname), setter)
1221
1829
1222
1830
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1223
1831
approvals_pending = notifychangeproperty(dbus.Boolean,
1224
1832
"ApprovalPending",
1225
type_func = bool)
1833
type_func=bool)
1226
1834
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1227
1835
last_enabled = notifychangeproperty(datetime_to_dbus,
1228
1836
"LastEnabled")
1229
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1230
type_func = lambda checker:
1231
checker is not None)
1837
checker = notifychangeproperty(
1838
dbus.Boolean, "CheckerRunning",
1839
type_func=lambda checker: checker is not None)
1232
1840
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1233
1841
"LastCheckedOK")
1234
1842
last_checker_status = notifychangeproperty(dbus.Int16,
1237
1845
datetime_to_dbus, "LastApprovalRequest")
1238
1846
approved_by_default = notifychangeproperty(dbus.Boolean,
1239
1847
"ApprovedByDefault")
1240
approval_delay = notifychangeproperty(dbus.UInt64,
1241
"ApprovalDelay",
1242
type_func =
1243
timedelta_to_milliseconds)
1848
approval_delay = notifychangeproperty(
1849
dbus.UInt64, "ApprovalDelay",
1850
type_func=lambda td: td.total_seconds() * 1000)
1244
1851
approval_duration = notifychangeproperty(
1245
1852
dbus.UInt64, "ApprovalDuration",
1246
type_func = timedelta_to_milliseconds)
1853
type_func=lambda td: td.total_seconds() * 1000)
1247
1854
host = notifychangeproperty(dbus.String, "Host")
1248
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1249
type_func =
1250
timedelta_to_milliseconds)
1855
timeout = notifychangeproperty(
1856
dbus.UInt64, "Timeout",
1857
type_func=lambda td: td.total_seconds() * 1000)
1251
1858
extended_timeout = notifychangeproperty(
1252
1859
dbus.UInt64, "ExtendedTimeout",
1253
type_func = timedelta_to_milliseconds)
1254
interval = notifychangeproperty(dbus.UInt64,
1255
"Interval",
1256
type_func =
1257
timedelta_to_milliseconds)
1860
type_func=lambda td: td.total_seconds() * 1000)
1861
interval = notifychangeproperty(
1862
dbus.UInt64, "Interval",
1863
type_func=lambda td: td.total_seconds() * 1000)
1258
1864
checker_command = notifychangeproperty(dbus.String, "Checker")
1259
1865
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1866
invalidate_only=True)
1867
1260
1868
del notifychangeproperty
1261
1869
1262
1870
def __del__(self, *args, **kwargs):
1263
1871
try:
1264
1872
self.remove_from_connection()
1267
1875
if hasattr(DBusObjectWithProperties, "__del__"):
1268
1876
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1269
1877
Client.__del__(self, *args, **kwargs)
1270
1271
def checker_callback(self, pid, condition, command,
1272
*args, **kwargs):
1273
self.checker_callback_tag = None
1274
self.checker = None
1275
if os.WIFEXITED(condition):
1276
exitstatus = os.WEXITSTATUS(condition)
1878
1879
def checker_callback(self, source, condition,
1880
connection, command, *args, **kwargs):
1881
ret = Client.checker_callback(self, source, condition,
1882
connection, command, *args,
1883
**kwargs)
1884
exitstatus = self.last_checker_status
1885
if exitstatus >= 0:
1277
1886
# Emit D-Bus signal
1278
1887
self.CheckerCompleted(dbus.Int16(exitstatus),
1279
dbus.Int64(condition),
1888
# This is specific to GNU libC
1889
dbus.Int64(exitstatus << 8),
1280
1890
dbus.String(command))
1281
1891
else:
1282
1892
# Emit D-Bus signal
1283
1893
self.CheckerCompleted(dbus.Int16(-1),
1284
dbus.Int64(condition),
1894
dbus.Int64(
1895
# This is specific to GNU libC
1896
(exitstatus << 8)
1897
| self.last_checker_signal),
1285
1898
dbus.String(command))
1286
1287
return Client.checker_callback(self, pid, condition, command,
1288
*args, **kwargs)
1289
1899
return ret
1900
1290
1901
def start_checker(self, *args, **kwargs):
1291
old_checker = self.checker
1292
if self.checker is not None:
1293
old_checker_pid = self.checker.pid
1294
else:
1295
old_checker_pid = None
1902
old_checker_pid = getattr(self.checker, "pid", None)
1296
1903
r = Client.start_checker(self, *args, **kwargs)
1297
1904
# Only if new checker process was started
1298
1905
if (self.checker is not None
1300
1907
# Emit D-Bus signal
1301
1908
self.CheckerStarted(self.current_checker_command)
1302
1909
return r
1303
1910
1304
1911
def _reset_approved(self):
1305
1912
self.approved = None
1306
1913
return False
1307
1914
1308
1915
def approve(self, value=True):
1309
self.send_changedstate()
1310
1916
self.approved = value
1311
gobject.timeout_add(timedelta_to_milliseconds
1312
(self.approval_duration),
1313
self._reset_approved)
1314
1315
## D-Bus methods, signals & properties
1316
_interface = "se.recompile.Mandos.Client"
1317
1318
## Interfaces
1319
1320
@dbus_interface_annotations(_interface)
1321
def _foo(self):
1322
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1323
"false"}
1324
1325
## Signals
1326
1917
GLib.timeout_add(int(self.approval_duration.total_seconds()
1918
* 1000), self._reset_approved)
1919
self.send_changedstate()
1920
1921
# D-Bus methods, signals & properties
1922
1923
# Interfaces
1924
1925
# Signals
1926
1327
1927
# CheckerCompleted - signal
1328
1928
@dbus.service.signal(_interface, signature="nxs")
1329
1929
def CheckerCompleted(self, exitcode, waitstatus, command):
1330
1930
"D-Bus signal"
1331
1931
pass
1332
1932
1333
1933
# CheckerStarted - signal
1334
1934
@dbus.service.signal(_interface, signature="s")
1335
1935
def CheckerStarted(self, command):
1336
1936
"D-Bus signal"
1337
1937
pass
1338
1938
1339
1939
# PropertyChanged - signal
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1340
1941
@dbus.service.signal(_interface, signature="sv")
1341
1942
def PropertyChanged(self, property, value):
1342
1943
"D-Bus signal"
1343
1944
pass
1344
1945
1345
1946
# GotSecret - signal
1346
1947
@dbus.service.signal(_interface)
1347
1948
def GotSecret(self):
1350
1951
server to mandos-client
1351
1952
"""
1352
1953
pass
1353
1954
1354
1955
# Rejected - signal
1355
1956
@dbus.service.signal(_interface, signature="s")
1356
1957
def Rejected(self, reason):
1357
1958
"D-Bus signal"
1358
1959
pass
1359
1960
1360
1961
# NeedApproval - signal
1361
1962
@dbus.service.signal(_interface, signature="tb")
1362
1963
def NeedApproval(self, timeout, default):
1363
1964
"D-Bus signal"
1364
1965
return self.need_approval()
1365
1366
## Methods
1367
1966
1967
# Methods
1968
1368
1969
# Approve - method
1369
1970
@dbus.service.method(_interface, in_signature="b")
1370
1971
def Approve(self, value):
1371
1972
self.approve(value)
1372
1973
1373
1974
# CheckedOK - method
1374
1975
@dbus.service.method(_interface)
1375
1976
def CheckedOK(self):
1376
1977
self.checked_ok()
1377
1978
1378
1979
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1379
1981
@dbus.service.method(_interface)
1380
1982
def Enable(self):
1381
1983
"D-Bus method"
1382
1984
self.enable()
1383
1985
1384
1986
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1385
1988
@dbus.service.method(_interface)
1386
1989
def StartChecker(self):
1387
1990
"D-Bus method"
1388
1991
self.start_checker()
1389
1992
1390
1993
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1391
1995
@dbus.service.method(_interface)
1392
1996
def Disable(self):
1393
1997
"D-Bus method"
1394
1998
self.disable()
1395
1999
1396
2000
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
2002
@dbus.service.method(_interface)
1398
2003
def StopChecker(self):
1399
2004
self.stop_checker()
1400
1401
## Properties
1402
2005
2006
# Properties
2007
1403
2008
# ApprovalPending - property
1404
2009
@dbus_service_property(_interface, signature="b", access="read")
1405
2010
def ApprovalPending_dbus_property(self):
1406
2011
return dbus.Boolean(bool(self.approvals_pending))
1407
2012
1408
2013
# ApprovedByDefault - property
1409
@dbus_service_property(_interface, signature="b",
2014
@dbus_service_property(_interface,
2015
signature="b",
1410
2016
access="readwrite")
1411
2017
def ApprovedByDefault_dbus_property(self, value=None):
1412
2018
if value is None: # get
1413
2019
return dbus.Boolean(self.approved_by_default)
1414
2020
self.approved_by_default = bool(value)
1415
2021
1416
2022
# ApprovalDelay - property
1417
@dbus_service_property(_interface, signature="t",
2023
@dbus_service_property(_interface,
2024
signature="t",
1418
2025
access="readwrite")
1419
2026
def ApprovalDelay_dbus_property(self, value=None):
1420
2027
if value is None: # get
1421
return dbus.UInt64(self.approval_delay_milliseconds())
2028
return dbus.UInt64(self.approval_delay.total_seconds()
2029
* 1000)
1422
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1423
2031
1424
2032
# ApprovalDuration - property
1425
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
2034
signature="t",
1426
2035
access="readwrite")
1427
2036
def ApprovalDuration_dbus_property(self, value=None):
1428
2037
if value is None: # get
1429
return dbus.UInt64(timedelta_to_milliseconds(
1430
self.approval_duration))
2038
return dbus.UInt64(self.approval_duration.total_seconds()
2039
* 1000)
1431
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1432
2041
1433
2042
# Name - property
2043
@dbus_annotations(
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1434
2045
@dbus_service_property(_interface, signature="s", access="read")
1435
2046
def Name_dbus_property(self):
1436
2047
return dbus.String(self.name)
1437
2048
2049
# KeyID - property
2050
@dbus_annotations(
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
2055
1438
2056
# Fingerprint - property
2057
@dbus_annotations(
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1439
2059
@dbus_service_property(_interface, signature="s", access="read")
1440
2060
def Fingerprint_dbus_property(self):
1441
2061
return dbus.String(self.fingerprint)
1442
2062
1443
2063
# Host - property
1444
@dbus_service_property(_interface, signature="s",
2064
@dbus_service_property(_interface,
2065
signature="s",
1445
2066
access="readwrite")
1446
2067
def Host_dbus_property(self, value=None):
1447
2068
if value is None: # get
1448
2069
return dbus.String(self.host)
1449
self.host = unicode(value)
1450
2070
self.host = str(value)
2071
1451
2072
# Created - property
2073
@dbus_annotations(
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1452
2075
@dbus_service_property(_interface, signature="s", access="read")
1453
2076
def Created_dbus_property(self):
1454
2077
return datetime_to_dbus(self.created)
1455
2078
1456
2079
# LastEnabled - property
1457
2080
@dbus_service_property(_interface, signature="s", access="read")
1458
2081
def LastEnabled_dbus_property(self):
1459
2082
return datetime_to_dbus(self.last_enabled)
1460
2083
1461
2084
# Enabled - property
1462
@dbus_service_property(_interface, signature="b",
2085
@dbus_service_property(_interface,
2086
signature="b",
1463
2087
access="readwrite")
1464
2088
def Enabled_dbus_property(self, value=None):
1465
2089
if value is None: # get
1468
2092
self.enable()
1469
2093
else:
1470
2094
self.disable()
1471
2095
1472
2096
# LastCheckedOK - property
1473
@dbus_service_property(_interface, signature="s",
2097
@dbus_service_property(_interface,
2098
signature="s",
1474
2099
access="readwrite")
1475
2100
def LastCheckedOK_dbus_property(self, value=None):
1476
2101
if value is not None:
1477
2102
self.checked_ok()
1478
2103
return
1479
2104
return datetime_to_dbus(self.last_checked_ok)
1480
2105
1481
2106
# LastCheckerStatus - property
1482
@dbus_service_property(_interface, signature="n",
1483
access="read")
2107
@dbus_service_property(_interface, signature="n", access="read")
1484
2108
def LastCheckerStatus_dbus_property(self):
1485
2109
return dbus.Int16(self.last_checker_status)
1486
2110
1487
2111
# Expires - property
1488
2112
@dbus_service_property(_interface, signature="s", access="read")
1489
2113
def Expires_dbus_property(self):
1490
2114
return datetime_to_dbus(self.expires)
1491
2115
1492
2116
# LastApprovalRequest - property
1493
2117
@dbus_service_property(_interface, signature="s", access="read")
1494
2118
def LastApprovalRequest_dbus_property(self):
1495
2119
return datetime_to_dbus(self.last_approval_request)
1496
2120
1497
2121
# Timeout - property
1498
@dbus_service_property(_interface, signature="t",
2122
@dbus_service_property(_interface,
2123
signature="t",
1499
2124
access="readwrite")
1500
2125
def Timeout_dbus_property(self, value=None):
1501
2126
if value is None: # get
1502
return dbus.UInt64(self.timeout_milliseconds())
2127
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2128
old_timeout = self.timeout
1503
2129
self.timeout = datetime.timedelta(0, 0, 0, value)
1504
# Reschedule timeout
2130
# Reschedule disabling
1505
2131
if self.enabled:
1506
2132
now = datetime.datetime.utcnow()
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
2133
self.expires += self.timeout - old_timeout
2134
if self.expires <= now:
1510
2135
# The timeout has passed
1511
2136
self.disable()
1512
2137
else:
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
1515
time_to_die))
1516
2138
if (getattr(self, "disable_initiator_tag", None)
1517
2139
is None):
1518
2140
return
1519
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
1521
(time_to_die,
1522
self.disable))
1523
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
2144
self.disable)
2145
1524
2146
# ExtendedTimeout - property
1525
@dbus_service_property(_interface, signature="t",
2147
@dbus_service_property(_interface,
2148
signature="t",
1526
2149
access="readwrite")
1527
2150
def ExtendedTimeout_dbus_property(self, value=None):
1528
2151
if value is None: # get
1529
return dbus.UInt64(self.extended_timeout_milliseconds())
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
2153
* 1000)
1530
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1531
2155
1532
2156
# Interval - property
1533
@dbus_service_property(_interface, signature="t",
2157
@dbus_service_property(_interface,
2158
signature="t",
1534
2159
access="readwrite")
1535
2160
def Interval_dbus_property(self, value=None):
1536
2161
if value is None: # get
1537
return dbus.UInt64(self.interval_milliseconds())
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1538
2163
self.interval = datetime.timedelta(0, 0, 0, value)
1539
2164
if getattr(self, "checker_initiator_tag", None) is None:
1540
2165
return
1541
2166
if self.enabled:
1542
2167
# Reschedule checker run
1543
gobject.source_remove(self.checker_initiator_tag)
1544
self.checker_initiator_tag = (gobject.timeout_add
1545
(value, self.start_checker))
1546
self.start_checker() # Start one now, too
1547
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
2172
1548
2173
# Checker - property
1549
@dbus_service_property(_interface, signature="s",
2174
@dbus_service_property(_interface,
2175
signature="s",
1550
2176
access="readwrite")
1551
2177
def Checker_dbus_property(self, value=None):
1552
2178
if value is None: # get
1553
2179
return dbus.String(self.checker_command)
1554
self.checker_command = unicode(value)
1555
2180
self.checker_command = str(value)
2181
1556
2182
# CheckerRunning - property
1557
@dbus_service_property(_interface, signature="b",
2183
@dbus_service_property(_interface,
2184
signature="b",
1558
2185
access="readwrite")
1559
2186
def CheckerRunning_dbus_property(self, value=None):
1560
2187
if value is None: # get
1563
2190
self.start_checker()
1564
2191
else:
1565
2192
self.stop_checker()
1566
2193
1567
2194
# ObjectPath - property
2195
@dbus_annotations(
2196
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2197
"org.freedesktop.DBus.Deprecated": "true"})
1568
2198
@dbus_service_property(_interface, signature="o", access="read")
1569
2199
def ObjectPath_dbus_property(self):
1570
return self.dbus_object_path # is already a dbus.ObjectPath
1571
2200
return self.dbus_object_path # is already a dbus.ObjectPath
2201
1572
2202
# Secret = property
1573
@dbus_service_property(_interface, signature="ay",
1574
access="write", byte_arrays=True)
2203
@dbus_annotations(
2204
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2205
"invalidates"})
2206
@dbus_service_property(_interface,
2207
signature="ay",
2208
access="write",
2209
byte_arrays=True)
1575
2210
def Secret_dbus_property(self, value):
1576
self.secret = str(value)
1577
2211
self.secret = bytes(value)
2212
1578
2213
del _interface
1579
2214
1580
2215
1581
2216
class ProxyClient(object):
1582
def __init__(self, child_pipe, fpr, address):
2217
def __init__(self, child_pipe, key_id, fpr, address):
1583
2218
self._pipe = child_pipe
1584
self._pipe.send(('init', fpr, address))
2219
self._pipe.send(('init', key_id, fpr, address))
1585
2220
if not self._pipe.recv():
1586
raise KeyError()
1587
2221
raise KeyError(key_id or fpr)
2222
1588
2223
def __getattribute__(self, name):
1589
2224
if name == '_pipe':
1590
2225
return super(ProxyClient, self).__getattribute__(name)
1593
2228
if data[0] == 'data':
1594
2229
return data[1]
1595
2230
if data[0] == 'function':
2231
1596
2232
def func(*args, **kwargs):
1597
2233
self._pipe.send(('funcall', name, args, kwargs))
1598
2234
return self._pipe.recv()[1]
2235
1599
2236
return func
1600
2237
1601
2238
def __setattr__(self, name, value):
1602
2239
if name == '_pipe':
1603
2240
return super(ProxyClient, self).__setattr__(name, value)
1604
2241
self._pipe.send(('setattr', name, value))
1605
2242
1606
2243
1607
class ClientDBusTransitional(ClientDBus):
1608
__metaclass__ = AlternateDBusNamesMetaclass
1609
1610
1611
2244
class ClientHandler(socketserver.BaseRequestHandler, object):
1612
2245
"""A class to handle client connections.
1613
2246
1614
2247
Instantiated once for each connection to handle it.
1615
2248
Note: This will run in its own forked process."""
1616
2249
1617
2250
def handle(self):
1618
2251
with contextlib.closing(self.server.child_pipe) as child_pipe:
1619
2252
logger.info("TCP connection from: %s",
1620
unicode(self.client_address))
2253
str(self.client_address))
1621
2254
logger.debug("Pipe FD: %d",
1622
2255
self.server.child_pipe.fileno())
1623
1624
session = (gnutls.connection
1625
.ClientSession(self.request,
1626
gnutls.connection
1627
.X509Credentials()))
1628
1629
# Note: gnutls.connection.X509Credentials is really a
1630
# generic GnuTLS certificate credentials object so long as
1631
# no X.509 keys are added to it. Therefore, we can use it
1632
# here despite using OpenPGP certificates.
1633
1634
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1635
# "+AES-256-CBC", "+SHA1",
1636
# "+COMP-NULL", "+CTYPE-OPENPGP",
1637
# "+DHE-DSS"))
2256
2257
session = gnutls.ClientSession(self.request)
2258
2259
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2260
# "+AES-256-CBC", "+SHA1",
2261
# "+COMP-NULL", "+CTYPE-OPENPGP",
2262
# "+DHE-DSS"))
1638
2263
# Use a fallback default, since this MUST be set.
1639
2264
priority = self.server.gnutls_priority
1640
2265
if priority is None:
1641
2266
priority = "NORMAL"
1642
(gnutls.library.functions
1643
.gnutls_priority_set_direct(session._c_object,
1644
priority, None))
1645
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
2269
None)
2270
1646
2271
# Start communication using the Mandos protocol
1647
2272
# Get protocol number
1648
2273
line = self.request.makefile().readline()
1649
2274
logger.debug("Protocol version: %r", line)
1650
2275
try:
1651
2276
if int(line.strip().split()[0]) > 1:
1652
raise RuntimeError
2277
raise RuntimeError(line)
1653
2278
except (ValueError, IndexError, RuntimeError) as error:
1654
2279
logger.error("Unknown protocol version: %s", error)
1655
2280
return
1656
2281
1657
2282
# Start GnuTLS connection
1658
2283
try:
1659
2284
session.handshake()
1660
except gnutls.errors.GNUTLSError as error:
2285
except gnutls.Error as error:
1661
2286
logger.warning("Handshake failed: %s", error)
1662
2287
# Do not run session.bye() here: the session is not
1663
2288
# established. Just abandon the request.
1664
2289
return
1665
2290
logger.debug("Handshake succeeded")
1666
2291
1667
2292
approval_required = False
1668
2293
try:
1669
try:
1670
fpr = self.fingerprint(self.peer_certificate
1671
(session))
1672
except (TypeError,
1673
gnutls.errors.GNUTLSError) as error:
1674
logger.warning("Bad certificate: %s", error)
1675
return
1676
logger.debug("Fingerprint: %s", fpr)
1677
1678
try:
1679
client = ProxyClient(child_pipe, fpr,
2294
if gnutls.has_rawpk:
2295
fpr = b""
2296
try:
2297
key_id = self.key_id(
2298
self.peer_certificate(session))
2299
except (TypeError, gnutls.Error) as error:
2300
logger.warning("Bad certificate: %s", error)
2301
return
2302
logger.debug("Key ID: %s", key_id)
2303
2304
else:
2305
key_id = b""
2306
try:
2307
fpr = self.fingerprint(
2308
self.peer_certificate(session))
2309
except (TypeError, gnutls.Error) as error:
2310
logger.warning("Bad certificate: %s", error)
2311
return
2312
logger.debug("Fingerprint: %s", fpr)
2313
2314
try:
2315
client = ProxyClient(child_pipe, key_id, fpr,
1680
2316
self.client_address)
1681
2317
except KeyError:
1682
2318
return
1683
2319
1684
2320
if client.approval_delay:
1685
2321
delay = client.approval_delay
1686
2322
client.approvals_pending += 1
1687
2323
approval_required = True
1688
2324
1689
2325
while True:
1690
2326
if not client.enabled:
1691
2327
logger.info("Client %s is disabled",
1692
client.name)
2328
client.name)
1693
2329
if self.server.use_dbus:
1694
2330
# Emit D-Bus signal
1695
2331
client.Rejected("Disabled")
1696
2332
return
1697
2333
1698
2334
if client.approved or not client.approval_delay:
1699
#We are approved or approval is disabled
2335
# We are approved or approval is disabled
1700
2336
break
1701
2337
elif client.approved is None:
1702
2338
logger.info("Client %s needs approval",
1704
2340
if self.server.use_dbus:
1705
2341
# Emit D-Bus signal
1706
2342
client.NeedApproval(
1707
client.approval_delay_milliseconds(),
1708
client.approved_by_default)
2343
client.approval_delay.total_seconds()
2344
* 1000, client.approved_by_default)
1709
2345
else:
1710
2346
logger.warning("Client %s was not approved",
1711
2347
client.name)
1713
2349
# Emit D-Bus signal
1714
2350
client.Rejected("Denied")
1715
2351
return
1716
1717
#wait until timeout or approved
2352
2353
# wait until timeout or approved
1718
2354
time = datetime.datetime.now()
1719
2355
client.changedstate.acquire()
1720
(client.changedstate.wait
1721
(float(client.timedelta_to_milliseconds(delay)
1722
/ 1000)))
2356
client.changedstate.wait(delay.total_seconds())
1723
2357
client.changedstate.release()
1724
2358
time2 = datetime.datetime.now()
1725
2359
if (time2 - time) >= delay:
1735
2369
break
1736
2370
else:
1737
2371
delay -= time2 - time
1738
1739
sent_size = 0
1740
while sent_size < len(client.secret):
1741
try:
1742
sent = session.send(client.secret[sent_size:])
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("gnutls send failed",
1745
exc_info=error)
1746
return
1747
logger.debug("Sent: %d, remaining: %d",
1748
sent, len(client.secret)
1749
- (sent_size + sent))
1750
sent_size += sent
1751
2372
2373
try:
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
2377
exc_info=error)
2378
return
2379
1752
2380
logger.info("Sending secret to %s", client.name)
1753
2381
# bump the timeout using extended_timeout
1754
2382
client.bump_timeout(client.extended_timeout)
1755
2383
if self.server.use_dbus:
1756
2384
# Emit D-Bus signal
1757
2385
client.GotSecret()
1758
2386
1759
2387
finally:
1760
2388
if approval_required:
1761
2389
client.approvals_pending -= 1
1762
2390
try:
1763
2391
session.bye()
1764
except gnutls.errors.GNUTLSError as error:
2392
except gnutls.Error as error:
1765
2393
logger.warning("GnuTLS bye failed",
1766
2394
exc_info=error)
1767
2395
1768
2396
@staticmethod
1769
2397
def peer_certificate(session):
1770
"Return the peer's OpenPGP certificate as a bytestring"
1771
# If not an OpenPGP certificate...
1772
if (gnutls.library.functions
1773
.gnutls_certificate_type_get(session._c_object)
1774
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1775
# ...do the normal thing
1776
return session.peer_certificate
2398
"Return the peer's certificate as a bytestring"
2399
try:
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2401
gnutls.CTYPE_PEERS)
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2406
else:
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2411
valid_cert_types)
2412
# ...return invalid data
2413
return b""
1777
2414
list_size = ctypes.c_uint(1)
1778
cert_list = (gnutls.library.functions
1779
.gnutls_certificate_get_peers
2415
cert_list = (gnutls.certificate_get_peers
1780
2416
(session._c_object, ctypes.byref(list_size)))
1781
2417
if not bool(cert_list) and list_size.value != 0:
1782
raise gnutls.errors.GNUTLSError("error getting peer"
1783
" certificate")
2418
raise gnutls.Error("error getting peer certificate")
1784
2419
if list_size.value == 0:
1785
2420
return None
1786
2421
cert = cert_list[0]
1787
2422
return ctypes.string_at(cert.data, cert.size)
1788
2423
2424
@staticmethod
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2451
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
2456
return hex_key_id
2457
1789
2458
@staticmethod
1790
2459
def fingerprint(openpgp):
1791
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1792
2461
# New GnuTLS "datum" with the OpenPGP public key
1793
datum = (gnutls.library.types
1794
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1795
ctypes.POINTER
1796
(ctypes.c_ubyte)),
1797
ctypes.c_uint(len(openpgp))))
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1798
2466
# New empty GnuTLS certificate
1799
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1800
(gnutls.library.functions
1801
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1802
2469
# Import the OpenPGP public key into the certificate
1803
(gnutls.library.functions
1804
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1805
gnutls.library.constants
1806
.GNUTLS_OPENPGP_FMT_RAW))
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1807
2472
# Verify the self signature in the key
1808
2473
crtverify = ctypes.c_uint()
1809
(gnutls.library.functions
1810
.gnutls_openpgp_crt_verify_self(crt, 0,
1811
ctypes.byref(crtverify)))
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1812
2476
if crtverify.value != 0:
1813
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1814
raise (gnutls.errors.CertificateSecurityError
1815
("Verify failed"))
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
2479
=crtverify.value)
1816
2480
# New buffer for the fingerprint
1817
2481
buf = ctypes.create_string_buffer(20)
1818
2482
buf_len = ctypes.c_size_t()
1819
2483
# Get the fingerprint from the certificate into the buffer
1820
(gnutls.library.functions
1821
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1822
ctypes.byref(buf_len)))
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1823
2486
# Deinit the certificate
1824
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2487
gnutls.openpgp_crt_deinit(crt)
1825
2488
# Convert the buffer to a Python bytestring
1826
2489
fpr = ctypes.string_at(buf, buf_len.value)
1827
2490
# Convert the bytestring to hexadecimal notation
1831
2494
1832
2495
class MultiprocessingMixIn(object):
1833
2496
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2497
1834
2498
def sub_process_main(self, request, address):
1835
2499
try:
1836
2500
self.finish_request(request, address)
1837
2501
except Exception:
1838
2502
self.handle_error(request, address)
1839
2503
self.close_request(request)
1840
2504
1841
2505
def process_request(self, request, address):
1842
2506
"""Start a new process to process the request."""
1843
proc = multiprocessing.Process(target = self.sub_process_main,
1844
args = (request,
1845
address))
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
1846
2509
proc.start()
1847
2510
return proc
1848
2511
1849
2512
1850
2513
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1851
2514
""" adds a pipe to the MixIn """
2515
1852
2516
def process_request(self, request, client_address):
1853
2517
"""Overrides and wraps the original process_request().
1854
2518
1855
2519
This function creates a new pipe in self.pipe
1856
2520
"""
1857
2521
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1858
2522
1859
2523
proc = MultiprocessingMixIn.process_request(self, request,
1860
2524
client_address)
1861
2525
self.child_pipe.close()
1862
2526
self.add_pipe(parent_pipe, proc)
1863
2527
1864
2528
def add_pipe(self, parent_pipe, proc):
1865
2529
"""Dummy function; override as necessary"""
1866
raise NotImplementedError
2530
raise NotImplementedError()
1867
2531
1868
2532
1869
2533
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1870
2534
socketserver.TCPServer, object):
1871
2535
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1872
2536
1873
2537
Attributes:
1874
2538
enabled: Boolean; whether this server is activated yet
1875
2539
interface: None or a network interface name (string)
1876
2540
use_ipv6: Boolean; to use IPv6 or not
1877
2541
"""
2542
1878
2543
def __init__(self, server_address, RequestHandlerClass,
1879
interface=None, use_ipv6=True):
2544
interface=None,
2545
use_ipv6=True,
2546
socketfd=None):
2547
"""If socketfd is set, use that file descriptor instead of
2548
creating a new one with socket.socket().
2549
"""
1880
2550
self.interface = interface
1881
2551
if use_ipv6:
1882
2552
self.address_family = socket.AF_INET6
2553
if socketfd is not None:
2554
# Save the file descriptor
2555
self.socketfd = socketfd
2556
# Save the original socket.socket() function
2557
self.socket_socket = socket.socket
2558
2559
# To implement --socket, we monkey patch socket.socket.
2560
#
2561
# (When socketserver.TCPServer is a new-style class, we
2562
# could make self.socket into a property instead of monkey
2563
# patching socket.socket.)
2564
#
2565
# Create a one-time-only replacement for socket.socket()
2566
@functools.wraps(socket.socket)
2567
def socket_wrapper(*args, **kwargs):
2568
# Restore original function so subsequent calls are
2569
# not affected.
2570
socket.socket = self.socket_socket
2571
del self.socket_socket
2572
# This time only, return a new socket object from the
2573
# saved file descriptor.
2574
return socket.fromfd(self.socketfd, *args, **kwargs)
2575
# Replace socket.socket() function with wrapper
2576
socket.socket = socket_wrapper
2577
# The socketserver.TCPServer.__init__ will call
2578
# socket.socket(), which might be our replacement,
2579
# socket_wrapper(), if socketfd was set.
1883
2580
socketserver.TCPServer.__init__(self, server_address,
1884
2581
RequestHandlerClass)
2582
1885
2583
def server_bind(self):
1886
2584
"""This overrides the normal server_bind() function
1887
2585
to bind to an interface if one was specified, and also NOT to
1888
2586
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
1889
2588
if self.interface is not None:
1890
2589
if SO_BINDTODEVICE is None:
1891
logger.error("SO_BINDTODEVICE does not exist;"
1892
" cannot bind to interface %s",
1893
self.interface)
1894
else:
1895
try:
1896
self.socket.setsockopt(socket.SOL_SOCKET,
1897
SO_BINDTODEVICE,
1898
str(self.interface
1899
+ '\0'))
1900
except socket.error as error:
1901
if error[0] == errno.EPERM:
1902
logger.error("No permission to"
1903
" bind to interface %s",
1904
self.interface)
1905
elif error[0] == errno.ENOPROTOOPT:
1906
logger.error("SO_BINDTODEVICE not available;"
1907
" cannot bind to interface %s",
1908
self.interface)
1909
else:
1910
raise
2590
# Fall back to a hard-coded value which seems to be
2591
# common enough.
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2594
try:
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2605
self.interface)
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
2609
else:
2610
raise
1911
2611
# Only bind(2) the socket if we really need to.
1912
2612
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
1913
2615
if not self.server_address[0]:
1914
2616
if self.address_family == socket.AF_INET6:
1915
any_address = "::" # in6addr_any
2617
any_address = "::" # in6addr_any
1916
2618
else:
1917
any_address = socket.INADDR_ANY
2619
any_address = "0.0.0.0" # INADDR_ANY
1918
2620
self.server_address = (any_address,
1919
2621
self.server_address[1])
1920
2622
elif not self.server_address[1]:
1921
self.server_address = (self.server_address[0],
1922
0)
2623
self.server_address = (self.server_address[0], 0)
1923
2624
# if self.interface:
1924
2625
# self.server_address = (self.server_address[0],
1925
2626
# 0, # port
1931
2632
1932
2633
class MandosServer(IPv6_TCPServer):
1933
2634
"""Mandos server.
1934
2635
1935
2636
Attributes:
1936
2637
clients: set of Client objects
1937
2638
gnutls_priority GnuTLS priority string
1938
2639
use_dbus: Boolean; to emit D-Bus signals or not
1939
1940
Assumes a gobject.MainLoop event loop.
2640
2641
Assumes a GLib.MainLoop event loop.
1941
2642
"""
2643
1942
2644
def __init__(self, server_address, RequestHandlerClass,
1943
interface=None, use_ipv6=True, clients=None,
1944
gnutls_priority=None, use_dbus=True):
2645
interface=None,
2646
use_ipv6=True,
2647
clients=None,
2648
gnutls_priority=None,
2649
use_dbus=True,
2650
socketfd=None):
1945
2651
self.enabled = False
1946
2652
self.clients = clients
1947
2653
if self.clients is None:
1950
2656
self.gnutls_priority = gnutls_priority
1951
2657
IPv6_TCPServer.__init__(self, server_address,
1952
2658
RequestHandlerClass,
1953
interface = interface,
1954
use_ipv6 = use_ipv6)
2659
interface=interface,
2660
use_ipv6=use_ipv6,
2661
socketfd=socketfd)
2662
1955
2663
def server_activate(self):
1956
2664
if self.enabled:
1957
2665
return socketserver.TCPServer.server_activate(self)
1958
2666
1959
2667
def enable(self):
1960
2668
self.enabled = True
1961
2669
1962
2670
def add_pipe(self, parent_pipe, proc):
1963
2671
# Call "handle_ipc" for both data and EOF events
1964
gobject.io_add_watch(parent_pipe.fileno(),
1965
gobject.IO_IN | gobject.IO_HUP,
1966
functools.partial(self.handle_ipc,
1967
parent_pipe =
1968
parent_pipe,
1969
proc = proc))
1970
1971
def handle_ipc(self, source, condition, parent_pipe=None,
1972
proc = None, client_object=None):
1973
condition_names = {
1974
gobject.IO_IN: "IN", # There is data to read.
1975
gobject.IO_OUT: "OUT", # Data can be written (without
1976
# blocking).
1977
gobject.IO_PRI: "PRI", # There is urgent data to read.
1978
gobject.IO_ERR: "ERR", # Error condition.
1979
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1980
# broken, usually for pipes and
1981
# sockets).
1982
}
1983
conditions_string = ' | '.join(name
1984
for cond, name in
1985
condition_names.iteritems()
1986
if cond & condition)
2672
GLib.io_add_watch(
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2677
proc=proc))
2678
2679
def handle_ipc(self, source, condition,
2680
parent_pipe=None,
2681
proc=None,
2682
client_object=None):
1987
2683
# error, or the other end of multiprocessing.Pipe has closed
1988
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1989
2685
# Wait for other process to exit
1990
2686
proc.join()
1991
2687
return False
1992
2688
1993
2689
# Read a request from the child
1994
2690
request = parent_pipe.recv()
1995
2691
command = request[0]
1996
2692
1997
2693
if command == 'init':
1998
fpr = request[1]
1999
address = request[2]
2000
2001
for c in self.clients.itervalues():
2002
if c.fingerprint == fpr:
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2697
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2700
continue
2701
if key_id and c.key_id == key_id:
2702
client = c
2703
break
2704
if fpr and c.fingerprint == fpr:
2003
2705
client = c
2004
2706
break
2005
2707
else:
2006
logger.info("Client not found for fingerprint: %s, ad"
2007
"dress: %s", fpr, address)
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
2008
2710
if self.use_dbus:
2009
2711
# Emit D-Bus signal
2010
mandos_dbus_service.ClientNotFound(fpr,
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
2011
2713
address[0])
2012
2714
parent_pipe.send(False)
2013
2715
return False
2014
2015
gobject.io_add_watch(parent_pipe.fileno(),
2016
gobject.IO_IN | gobject.IO_HUP,
2017
functools.partial(self.handle_ipc,
2018
parent_pipe =
2019
parent_pipe,
2020
proc = proc,
2021
client_object =
2022
client))
2716
2717
GLib.io_add_watch(
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2722
proc=proc,
2723
client_object=client))
2023
2724
parent_pipe.send(True)
2024
2725
# remove the old hook in favor of the new above hook on
2025
2726
# same fileno
2028
2729
funcname = request[1]
2029
2730
args = request[2]
2030
2731
kwargs = request[3]
2031
2732
2032
2733
parent_pipe.send(('data', getattr(client_object,
2033
2734
funcname)(*args,
2034
**kwargs)))
2035
2735
**kwargs)))
2736
2036
2737
if command == 'getattr':
2037
2738
attrname = request[1]
2038
if callable(client_object.__getattribute__(attrname)):
2039
parent_pipe.send(('function',))
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
2040
2742
else:
2041
parent_pipe.send(('data', client_object
2042
.__getattribute__(attrname)))
2043
2743
parent_pipe.send((
2744
'data', client_object.__getattribute__(attrname)))
2745
2044
2746
if command == 'setattr':
2045
2747
attrname = request[1]
2046
2748
value = request[2]
2047
2749
setattr(client_object, attrname, value)
2048
2750
2049
2751
return True
2050
2752
2051
2753
2754
def rfc3339_duration_to_delta(duration):
2755
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2756
2757
>>> rfc3339_duration_to_delta("P7D")
2758
datetime.timedelta(7)
2759
>>> rfc3339_duration_to_delta("PT60S")
2760
datetime.timedelta(0, 60)
2761
>>> rfc3339_duration_to_delta("PT60M")
2762
datetime.timedelta(0, 3600)
2763
>>> rfc3339_duration_to_delta("PT24H")
2764
datetime.timedelta(1)
2765
>>> rfc3339_duration_to_delta("P1W")
2766
datetime.timedelta(7)
2767
>>> rfc3339_duration_to_delta("PT5M30S")
2768
datetime.timedelta(0, 330)
2769
>>> rfc3339_duration_to_delta("P1DT3M20S")
2770
datetime.timedelta(1, 200)
2771
"""
2772
2773
# Parsing an RFC 3339 duration with regular expressions is not
2774
# possible - there would have to be multiple places for the same
2775
# values, like seconds. The current code, while more esoteric, is
2776
# cleaner without depending on a parsing library. If Python had a
2777
# built-in library for parsing we would use it, but we'd like to
2778
# avoid excessive use of external libraries.
2779
2780
# New type for defining tokens, syntax, and semantics all-in-one
2781
Token = collections.namedtuple("Token", (
2782
"regexp", # To match token; if "value" is not None, must have
2783
# a "group" containing digits
2784
"value", # datetime.timedelta or None
2785
"followers")) # Tokens valid after this token
2786
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2787
# the "duration" ABNF definition in RFC 3339, Appendix A.
2788
token_end = Token(re.compile(r"$"), None, frozenset())
2789
token_second = Token(re.compile(r"(\d+)S"),
2790
datetime.timedelta(seconds=1),
2791
frozenset((token_end, )))
2792
token_minute = Token(re.compile(r"(\d+)M"),
2793
datetime.timedelta(minutes=1),
2794
frozenset((token_second, token_end)))
2795
token_hour = Token(re.compile(r"(\d+)H"),
2796
datetime.timedelta(hours=1),
2797
frozenset((token_minute, token_end)))
2798
token_time = Token(re.compile(r"T"),
2799
None,
2800
frozenset((token_hour, token_minute,
2801
token_second)))
2802
token_day = Token(re.compile(r"(\d+)D"),
2803
datetime.timedelta(days=1),
2804
frozenset((token_time, token_end)))
2805
token_month = Token(re.compile(r"(\d+)M"),
2806
datetime.timedelta(weeks=4),
2807
frozenset((token_day, token_end)))
2808
token_year = Token(re.compile(r"(\d+)Y"),
2809
datetime.timedelta(weeks=52),
2810
frozenset((token_month, token_end)))
2811
token_week = Token(re.compile(r"(\d+)W"),
2812
datetime.timedelta(weeks=1),
2813
frozenset((token_end, )))
2814
token_duration = Token(re.compile(r"P"), None,
2815
frozenset((token_year, token_month,
2816
token_day, token_time,
2817
token_week)))
2818
# Define starting values:
2819
# Value so far
2820
value = datetime.timedelta()
2821
found_token = None
2822
# Following valid tokens
2823
followers = frozenset((token_duration, ))
2824
# String left to parse
2825
s = duration
2826
# Loop until end token is found
2827
while found_token is not token_end:
2828
# Search for any currently valid tokens
2829
for token in followers:
2830
match = token.regexp.match(s)
2831
if match is not None:
2832
# Token found
2833
if token.value is not None:
2834
# Value found, parse digits
2835
factor = int(match.group(1), 10)
2836
# Add to value so far
2837
value += factor * token.value
2838
# Strip token from string
2839
s = token.regexp.sub("", s, 1)
2840
# Go to found token
2841
found_token = token
2842
# Set valid next tokens
2843
followers = found_token.followers
2844
break
2845
else:
2846
# No currently valid tokens were found
2847
raise ValueError("Invalid RFC 3339 duration: {!r}"
2848
.format(duration))
2849
# End token found
2850
return value
2851
2852
2052
2853
def string_to_delta(interval):
2053
2854
"""Parse a string and return a datetime.timedelta
2054
2855
2055
2856
>>> string_to_delta('7d')
2056
2857
datetime.timedelta(7)
2057
2858
>>> string_to_delta('60s')
2065
2866
>>> string_to_delta('5m 30s')
2066
2867
datetime.timedelta(0, 330)
2067
2868
"""
2869
2870
try:
2871
return rfc3339_duration_to_delta(interval)
2872
except ValueError:
2873
pass
2874
2068
2875
timevalue = datetime.timedelta(0)
2069
2876
for s in interval.split():
2070
2877
try:
2071
suffix = unicode(s[-1])
2878
suffix = s[-1]
2072
2879
value = int(s[:-1])
2073
2880
if suffix == "d":
2074
2881
delta = datetime.timedelta(value)
2081
2888
elif suffix == "w":
2082
2889
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2083
2890
else:
2084
raise ValueError("Unknown suffix {0!r}"
2085
.format(suffix))
2086
except (ValueError, IndexError) as e:
2891
raise ValueError("Unknown suffix {!r}".format(suffix))
2892
except IndexError as e:
2087
2893
raise ValueError(*(e.args))
2088
2894
timevalue += delta
2089
2895
return timevalue
2090
2896
2091
2897
2092
def daemon(nochdir = False, noclose = False):
2898
def daemon(nochdir=False, noclose=False):
2093
2899
"""See daemon(3). Standard BSD Unix function.
2094
2900
2095
2901
This should really exist as os.daemon, but it doesn't (yet)."""
2096
2902
if os.fork():
2097
2903
sys.exit()
2105
2911
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2106
2912
if not stat.S_ISCHR(os.fstat(null).st_mode):
2107
2913
raise OSError(errno.ENODEV,
2108
"{0} not a character device"
2914
"{} not a character device"
2109
2915
.format(os.devnull))
2110
2916
os.dup2(null, sys.stdin.fileno())
2111
2917
os.dup2(null, sys.stdout.fileno())
2115
2921
2116
2922
2117
2923
def main():
2118
2924
2119
2925
##################################################################
2120
2926
# Parsing of options, both command line and config file
2121
2927
2122
2928
parser = argparse.ArgumentParser()
2123
2929
parser.add_argument("-v", "--version", action="version",
2124
version = "%(prog)s {0}".format(version),
2930
version="%(prog)s {}".format(version),
2125
2931
help="show version number and exit")
2126
2932
parser.add_argument("-i", "--interface", metavar="IF",
2127
2933
help="Bind to interface IF")
2133
2939
help="Run self-test")
2134
2940
parser.add_argument("--debug", action="store_true",
2135
2941
help="Debug mode; run in foreground and log"
2136
" to terminal")
2942
" to terminal", default=None)
2137
2943
parser.add_argument("--debuglevel", metavar="LEVEL",
2138
2944
help="Debug level for stdout output")
2139
2945
parser.add_argument("--priority", help="GnuTLS"
2146
2952
" files")
2147
2953
parser.add_argument("--no-dbus", action="store_false",
2148
2954
dest="use_dbus", help="Do not provide D-Bus"
2149
" system bus interface")
2955
" system bus interface", default=None)
2150
2956
parser.add_argument("--no-ipv6", action="store_false",
2151
dest="use_ipv6", help="Do not use IPv6")
2957
dest="use_ipv6", help="Do not use IPv6",
2958
default=None)
2152
2959
parser.add_argument("--no-restore", action="store_false",
2153
2960
dest="restore", help="Do not restore stored"
2154
" state")
2961
" state", default=None)
2962
parser.add_argument("--socket", type=int,
2963
help="Specify a file descriptor to a network"
2964
" socket to use instead of creating one")
2155
2965
parser.add_argument("--statedir", metavar="DIR",
2156
2966
help="Directory to save/restore state in")
2157
2967
parser.add_argument("--foreground", action="store_true",
2968
help="Run in foreground", default=None)
2969
parser.add_argument("--no-zeroconf", action="store_false",
2970
dest="zeroconf", help="Do not use Zeroconf",
2971
default=None)
2972
2158
2973
options = parser.parse_args()
2159
2974
2160
2975
if options.check:
2161
2976
import doctest
2162
doctest.testmod()
2163
sys.exit()
2164
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2979
2165
2980
# Default values for config file for server-global settings
2166
server_defaults = { "interface": "",
2167
"address": "",
2168
"port": "",
2169
"debug": "False",
2170
"priority":
2171
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2172
"servicename": "Mandos",
2173
"use_dbus": "True",
2174
"use_ipv6": "True",
2175
"debuglevel": "",
2176
"restore": "True",
2177
"statedir": "/var/lib/mandos"
2178
}
2179
2981
if gnutls.has_rawpk:
2982
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2983
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2984
else:
2985
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2986
":+SIGN-DSA-SHA256")
2987
server_defaults = {"interface": "",
2988
"address": "",
2989
"port": "",
2990
"debug": "False",
2991
"priority": priority,
2992
"servicename": "Mandos",
2993
"use_dbus": "True",
2994
"use_ipv6": "True",
2995
"debuglevel": "",
2996
"restore": "True",
2997
"socket": "",
2998
"statedir": "/var/lib/mandos",
2999
"foreground": "False",
3000
"zeroconf": "True",
3001
}
3002
del priority
3003
2180
3004
# Parse config file for server-global settings
2181
server_config = configparser.SafeConfigParser(server_defaults)
3005
server_config = configparser.ConfigParser(server_defaults)
2182
3006
del server_defaults
2183
server_config.read(os.path.join(options.configdir,
2184
"mandos.conf"))
2185
# Convert the SafeConfigParser object to a dict
3007
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
2186
3009
server_settings = server_config.defaults()
2187
3010
# Use the appropriate methods on the non-string config options
2188
for option in ("debug", "use_dbus", "use_ipv6"):
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
2189
3013
server_settings[option] = server_config.getboolean("DEFAULT",
2190
3014
option)
2191
3015
if server_settings["port"]:
2192
3016
server_settings["port"] = server_config.getint("DEFAULT",
2193
3017
"port")
3018
if server_settings["socket"]:
3019
server_settings["socket"] = server_config.getint("DEFAULT",
3020
"socket")
3021
# Later, stdin will, and stdout and stderr might, be dup'ed
3022
# over with an opened os.devnull. But we don't want this to
3023
# happen with a supplied network socket.
3024
if 0 <= server_settings["socket"] <= 2:
3025
server_settings["socket"] = os.dup(server_settings
3026
["socket"])
2194
3027
del server_config
2195
3028
2196
3029
# Override the settings from the config file with command line
2197
3030
# options, if set.
2198
3031
for option in ("interface", "address", "port", "debug",
2199
"priority", "servicename", "configdir",
2200
"use_dbus", "use_ipv6", "debuglevel", "restore",
2201
"statedir"):
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
2202
3035
value = getattr(options, option)
2203
3036
if value is not None:
2204
3037
server_settings[option] = value
2205
3038
del options
2206
3039
# Force all strings to be unicode
2207
3040
for option in server_settings.keys():
2208
if type(server_settings[option]) is str:
2209
server_settings[option] = unicode(server_settings[option])
3041
if isinstance(server_settings[option], bytes):
3042
server_settings[option] = (server_settings[option]
3043
.decode("utf-8"))
3044
# Force all boolean options to be boolean
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
3047
server_settings[option] = bool(server_settings[option])
3048
# Debug implies foreground
3049
if server_settings["debug"]:
3050
server_settings["foreground"] = True
2210
3051
# Now we have our good server settings in "server_settings"
2211
3052
2212
3053
##################################################################
2213
3054
3055
if (not server_settings["zeroconf"]
3056
and not (server_settings["port"]
3057
or server_settings["socket"] != "")):
3058
parser.error("Needs port or socket to work without Zeroconf")
3059
2214
3060
# For convenience
2215
3061
debug = server_settings["debug"]
2216
3062
debuglevel = server_settings["debuglevel"]
2218
3064
use_ipv6 = server_settings["use_ipv6"]
2219
3065
stored_state_path = os.path.join(server_settings["statedir"],
2220
3066
stored_state_file)
2221
3067
foreground = server_settings["foreground"]
3068
zeroconf = server_settings["zeroconf"]
3069
2222
3070
if debug:
2223
3071
initlogger(debug, logging.DEBUG)
2224
3072
else:
2227
3075
else:
2228
3076
level = getattr(logging, debuglevel.upper())
2229
3077
initlogger(debug, level)
2230
3078
2231
3079
if server_settings["servicename"] != "Mandos":
2232
syslogger.setFormatter(logging.Formatter
2233
('Mandos ({0}) [%(process)d]:'
2234
' %(levelname)s: %(message)s'
2235
.format(server_settings
2236
["servicename"])))
2237
3080
syslogger.setFormatter(
3081
logging.Formatter('Mandos ({}) [%(process)d]:'
3082
' %(levelname)s: %(message)s'.format(
3083
server_settings["servicename"])))
3084
2238
3085
# Parse config file with clients
2239
client_config = configparser.SafeConfigParser(Client
2240
.client_defaults)
3086
client_config = configparser.ConfigParser(Client.client_defaults)
2241
3087
client_config.read(os.path.join(server_settings["configdir"],
2242
3088
"clients.conf"))
2243
3089
2244
3090
global mandos_dbus_service
2245
3091
mandos_dbus_service = None
2246
2247
tcp_server = MandosServer((server_settings["address"],
2248
server_settings["port"]),
2249
ClientHandler,
2250
interface=(server_settings["interface"]
2251
or None),
2252
use_ipv6=use_ipv6,
2253
gnutls_priority=
2254
server_settings["priority"],
2255
use_dbus=use_dbus)
2256
if not debug:
2257
pidfilename = "/var/run/mandos.pid"
3092
3093
socketfd = None
3094
if server_settings["socket"] != "":
3095
socketfd = server_settings["socket"]
3096
tcp_server = MandosServer(
3097
(server_settings["address"], server_settings["port"]),
3098
ClientHandler,
3099
interface=(server_settings["interface"] or None),
3100
use_ipv6=use_ipv6,
3101
gnutls_priority=server_settings["priority"],
3102
use_dbus=use_dbus,
3103
socketfd=socketfd)
3104
if not foreground:
3105
pidfilename = "/run/mandos.pid"
3106
if not os.path.isdir("/run/."):
3107
pidfilename = "/var/run/mandos.pid"
3108
pidfile = None
2258
3109
try:
2259
pidfile = open(pidfilename, "w")
3110
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2260
3111
except IOError as e:
2261
3112
logger.error("Could not open file %r", pidfilename,
2262
3113
exc_info=e)
2263
2264
for name in ("_mandos", "mandos", "nobody"):
3114
3115
for name, group in (("_mandos", "_mandos"),
3116
("mandos", "mandos"),
3117
("nobody", "nogroup")):
2265
3118
try:
2266
3119
uid = pwd.getpwnam(name).pw_uid
2267
gid = pwd.getpwnam(name).pw_gid
3120
gid = pwd.getpwnam(group).pw_gid
2268
3121
break
2269
3122
except KeyError:
2270
3123
continue
2274
3127
try:
2275
3128
os.setgid(gid)
2276
3129
os.setuid(uid)
3130
if debug:
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3132
gid))
2277
3133
except OSError as error:
2278
if error[0] != errno.EPERM:
2279
raise error
2280
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
3137
raise
3138
2281
3139
if debug:
2282
3140
# Enable all possible GnuTLS debugging
2283
3141
2284
3142
# "Use a log level over 10 to enable all debugging options."
2285
3143
# - GnuTLS manual
2286
gnutls.library.functions.gnutls_global_set_log_level(11)
2287
2288
@gnutls.library.types.gnutls_log_func
3144
gnutls.global_set_log_level(11)
3145
3146
@gnutls.log_func
2289
3147
def debug_gnutls(level, string):
2290
3148
logger.debug("GnuTLS: %s", string[:-1])
2291
2292
(gnutls.library.functions
2293
.gnutls_global_set_log_function(debug_gnutls))
2294
3149
3150
gnutls.global_set_log_function(debug_gnutls)
3151
2295
3152
# Redirect stdin so all checkers get /dev/null
2296
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2297
3154
os.dup2(null, sys.stdin.fileno())
2298
3155
if null > 2:
2299
3156
os.close(null)
2300
3157
2301
3158
# Need to fork before connecting to D-Bus
2302
if not debug:
3159
if not foreground:
2303
3160
# Close all input and output, do double fork, etc.
2304
3161
daemon()
2305
2306
gobject.threads_init()
2307
3162
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
3166
GLib.threads_init()
3167
2308
3168
global main_loop
2309
3169
# From the Avahi example code
2310
3170
DBusGMainLoop(set_as_default=True)
2311
main_loop = gobject.MainLoop()
3171
main_loop = GLib.MainLoop()
2312
3172
bus = dbus.SystemBus()
2313
3173
# End of Avahi example code
2314
3174
if use_dbus:
2315
3175
try:
2316
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2317
bus, do_not_queue=True)
2318
old_bus_name = (dbus.service.BusName
2319
("se.bsnet.fukt.Mandos", bus,
2320
do_not_queue=True))
2321
except dbus.exceptions.NameExistsException as e:
3177
bus,
3178
do_not_queue=True)
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3181
do_not_queue=True)
3182
except dbus.exceptions.DBusException as e:
2322
3183
logger.error("Disabling D-Bus:", exc_info=e)
2323
3184
use_dbus = False
2324
3185
server_settings["use_dbus"] = False
2325
3186
tcp_server.use_dbus = False
2326
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2327
service = AvahiServiceToSyslog(name =
2328
server_settings["servicename"],
2329
servicetype = "_mandos._tcp",
2330
protocol = protocol, bus = bus)
2331
if server_settings["interface"]:
2332
service.interface = (if_nametoindex
2333
(str(server_settings["interface"])))
2334
3187
if zeroconf:
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3192
protocol=protocol,
3193
bus=bus)
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
3197
2335
3198
global multiprocessing_manager
2336
3199
multiprocessing_manager = multiprocessing.Manager()
2337
3200
2338
3201
client_class = Client
2339
3202
if use_dbus:
2340
client_class = functools.partial(ClientDBusTransitional,
2341
bus = bus)
2342
3203
client_class = functools.partial(ClientDBus, bus=bus)
3204
2343
3205
client_settings = Client.config_parser(client_config)
2344
3206
old_client_settings = {}
2345
3207
clients_data = {}
2346
3208
3209
# This is used to redirect stdout and stderr for checker processes
3210
global wnull
3211
wnull = open(os.devnull, "w") # A writable /dev/null
3212
# Only used if server is running in foreground but not in debug
3213
# mode
3214
if debug or not foreground:
3215
wnull.close()
3216
2347
3217
# Get client data and settings from last running state.
2348
3218
if server_settings["restore"]:
2349
3219
try:
2350
3220
with open(stored_state_path, "rb") as stored_state:
2351
clients_data, old_client_settings = (pickle.load
2352
(stored_state))
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3223
stored_state)
3224
else:
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3228
# clients_data
3229
# .keys()
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3232
else key): value
3233
for key, value in
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3239
for k, v in
3240
clients_data[key].items()}
3241
clients_data[key] = value
3242
# .client_structure
3243
value["client_structure"] = [
3244
(s.decode("utf-8")
3245
if isinstance(s, bytes)
3246
else s) for s in
3247
value["client_structure"]]
3248
# .name & .host
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3257
# .keys()
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3261
else key): value
3262
for key, value in
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3265
# .host
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
3269
.decode("utf-8"))
2353
3270
os.remove(stored_state_path)
2354
3271
except IOError as e:
2355
3272
if e.errno == errno.ENOENT:
2356
logger.warning("Could not load persistent state: {0}"
2357
.format(os.strerror(e.errno)))
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
2358
3275
else:
2359
3276
logger.critical("Could not load persistent state:",
2360
3277
exc_info=e)
2361
3278
raise
2362
3279
except EOFError as e:
2363
3280
logger.warning("Could not load persistent state: "
2364
"EOFError:", exc_info=e)
2365
3281
"EOFError:",
3282
exc_info=e)
3283
2366
3284
with PGPEngine() as pgp:
2367
for client_name, client in clients_data.iteritems():
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
3288
continue
3289
2368
3290
# Decide which value to use after restoring saved state.
2369
3291
# We have three different values: Old config file,
2370
3292
# new config file, and saved state.
2375
3297
# For each value in new config, check if it
2376
3298
# differs from the old config value (Except for
2377
3299
# the "secret" attribute)
2378
if (name != "secret" and
2379
value != old_client_settings[client_name]
2380
[name]):
3300
if (name != "secret"
3301
and (value !=
3302
old_client_settings[client_name][name])):
2381
3303
client[name] = value
2382
3304
except KeyError:
2383
3305
pass
2384
3306
2385
3307
# Clients who has passed its expire date can still be
2386
# enabled if its last checker was successful. Clients
3308
# enabled if its last checker was successful. A Client
2387
3309
# whose checker succeeded before we stored its state is
2388
3310
# assumed to have successfully run all checkers during
2389
3311
# downtime.
2391
3313
if datetime.datetime.utcnow() >= client["expires"]:
2392
3314
if not client["last_checked_ok"]:
2393
3315
logger.warning(
2394
"disabling client {0} - Client never "
2395
"performed a successful checker"
2396
.format(client_name))
3316
"disabling client {} - Client never "
3317
"performed a successful checker".format(
3318
client_name))
2397
3319
client["enabled"] = False
2398
3320
elif client["last_checker_status"] != 0:
2399
3321
logger.warning(
2400
"disabling client {0} - Client "
2401
"last checker failed with error code {1}"
2402
.format(client_name,
2403
client["last_checker_status"]))
3322
"disabling client {} - Client last"
3323
" checker failed with error code"
3324
" {}".format(
3325
client_name,
3326
client["last_checker_status"]))
2404
3327
client["enabled"] = False
2405
3328
else:
2406
client["expires"] = (datetime.datetime
2407
.utcnow()
2408
+ client["timeout"])
3329
client["expires"] = (
3330
datetime.datetime.utcnow()
3331
+ client["timeout"])
2409
3332
logger.debug("Last checker succeeded,"
2410
" keeping {0} enabled"
2411
.format(client_name))
3333
" keeping {} enabled".format(
3334
client_name))
2412
3335
try:
2413
client["secret"] = (
2414
pgp.decrypt(client["encrypted_secret"],
2415
client_settings[client_name]
2416
["secret"]))
3336
client["secret"] = pgp.decrypt(
3337
client["encrypted_secret"],
3338
client_settings[client_name]["secret"])
2417
3339
except PGPError:
2418
3340
# If decryption fails, we use secret from new settings
2419
logger.debug("Failed to decrypt {0} old secret"
2420
.format(client_name))
2421
client["secret"] = (
2422
client_settings[client_name]["secret"])
2423
3341
logger.debug("Failed to decrypt {} old secret".format(
3342
client_name))
3343
client["secret"] = (client_settings[client_name]
3344
["secret"])
3345
2424
3346
# Add/remove clients based on new changes made to config
2425
3347
for client_name in (set(old_client_settings)
2426
3348
- set(client_settings)):
2428
3350
for client_name in (set(client_settings)
2429
3351
- set(old_client_settings)):
2430
3352
clients_data[client_name] = client_settings[client_name]
2431
3353
2432
3354
# Create all client objects
2433
for client_name, client in clients_data.iteritems():
3355
for client_name, client in clients_data.items():
2434
3356
tcp_server.clients[client_name] = client_class(
2435
name = client_name, settings = client)
2436
3357
name=client_name,
3358
settings=client,
3359
server_settings=server_settings)
3360
2437
3361
if not tcp_server.clients:
2438
3362
logger.warning("No clients defined")
2439
2440
if not debug:
2441
try:
2442
with pidfile:
2443
pid = os.getpid()
2444
pidfile.write(str(pid) + "\n".encode("utf-8"))
2445
del pidfile
2446
except IOError:
2447
logger.error("Could not write to file %r with PID %d",
2448
pidfilename, pid)
2449
except NameError:
2450
# "pidfile" was never created
2451
pass
3363
3364
if not foreground:
3365
if pidfile is not None:
3366
pid = os.getpid()
3367
try:
3368
with pidfile:
3369
print(pid, file=pidfile)
3370
except IOError:
3371
logger.error("Could not write to file %r with PID %d",
3372
pidfilename, pid)
3373
del pidfile
2452
3374
del pidfilename
2453
signal.signal(signal.SIGINT, signal.SIG_IGN)
2454
2455
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2456
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2457
3375
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
3379
2458
3380
if use_dbus:
2459
class MandosDBusService(DBusObjectWithProperties):
3381
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2460
3385
"""A D-Bus proxy object"""
3386
2461
3387
def __init__(self):
2462
3388
dbus.service.Object.__init__(self, bus, "/")
3389
2463
3390
_interface = "se.recompile.Mandos"
2464
2465
@dbus_interface_annotations(_interface)
2466
def _foo(self):
2467
return { "org.freedesktop.DBus.Property"
2468
".EmitsChangedSignal":
2469
"false"}
2470
3391
2471
3392
@dbus.service.signal(_interface, signature="o")
2472
3393
def ClientAdded(self, objpath):
2473
3394
"D-Bus signal"
2474
3395
pass
2475
3396
2476
3397
@dbus.service.signal(_interface, signature="ss")
2477
def ClientNotFound(self, fingerprint, address):
3398
def ClientNotFound(self, key_id, address):
2478
3399
"D-Bus signal"
2479
3400
pass
2480
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2481
3404
@dbus.service.signal(_interface, signature="os")
2482
3405
def ClientRemoved(self, objpath, name):
2483
3406
"D-Bus signal"
2484
3407
pass
2485
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
2486
3411
@dbus.service.method(_interface, out_signature="ao")
2487
3412
def GetAllClients(self):
2488
3413
"D-Bus method"
2489
return dbus.Array(c.dbus_object_path
2490
for c in
2491
tcp_server.clients.itervalues())
2492
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3416
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3418
"true"})
2493
3419
@dbus.service.method(_interface,
2494
3420
out_signature="a{oa{sv}}")
2495
3421
def GetAllClientsWithProperties(self):
2496
3422
"D-Bus method"
2497
3423
return dbus.Dictionary(
2498
((c.dbus_object_path, c.GetAll(""))
2499
for c in tcp_server.clients.itervalues()),
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2500
3427
signature="oa{sv}")
2501
3428
2502
3429
@dbus.service.method(_interface, in_signature="o")
2503
3430
def RemoveClient(self, object_path):
2504
3431
"D-Bus method"
2505
for c in tcp_server.clients.itervalues():
3432
for c in tcp_server.clients.values():
2506
3433
if c.dbus_object_path == object_path:
2507
3434
del tcp_server.clients[c.name]
2508
3435
c.remove_from_connection()
2509
# Don't signal anything except ClientRemoved
3436
# Don't signal the disabling
2510
3437
c.disable(quiet=True)
2511
# Emit D-Bus signal
2512
self.ClientRemoved(object_path, c.name)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2513
3440
return
2514
3441
raise KeyError(object_path)
2515
3442
2516
3443
del _interface
2517
2518
class MandosDBusServiceTransitional(MandosDBusService):
2519
__metaclass__ = AlternateDBusNamesMetaclass
2520
mandos_dbus_service = MandosDBusServiceTransitional()
2521
3444
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3448
"""D-Bus method"""
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3451
dbus.Dictionary(
3452
{interface: client.GetAll(interface)
3453
for interface in
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3456
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3459
if use_dbus:
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3463
dbus.Dictionary(
3464
{interface: client.GetAll(interface)
3465
for interface in
3466
client._get_all_interface_names()}))
3467
# Old signal
3468
self.ClientAdded(client.dbus_object_path)
3469
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3472
if use_dbus:
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3477
# Old signal
3478
self.ClientRemoved(client.dbus_object_path,
3479
client.name)
3480
3481
mandos_dbus_service = MandosDBusService()
3482
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
3486
wn = wnull
3487
2522
3488
def cleanup():
2523
3489
"Cleanup function; run on exit"
2524
service.cleanup()
2525
2526
multiprocessing.active_children()
3490
if zeroconf:
3491
service.cleanup()
3492
3493
mp.active_children()
3494
wn.close()
2527
3495
if not (tcp_server.clients or client_settings):
2528
3496
return
2529
3497
2530
3498
# Store client before exiting. Secrets are encrypted with key
2531
3499
# based on what config file has. If config file is
2532
3500
# removed/edited, old secret will thus be unrecovable.
2533
3501
clients = {}
2534
3502
with PGPEngine() as pgp:
2535
for client in tcp_server.clients.itervalues():
3503
for client in tcp_server.clients.values():
2536
3504
key = client_settings[client.name]["secret"]
2537
3505
client.encrypted_secret = pgp.encrypt(client.secret,
2538
3506
key)
2539
3507
client_dict = {}
2540
3508
2541
3509
# A list of attributes that can not be pickled
2542
3510
# + secret.
2543
exclude = set(("bus", "changedstate", "secret",
2544
"checker"))
2545
for name, typ in (inspect.getmembers
2546
(dbus.service.Object)):
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
3514
.Object):
2547
3515
exclude.add(name)
2548
3516
2549
3517
client_dict["encrypted_secret"] = (client
2550
3518
.encrypted_secret)
2551
3519
for attr in client.client_structure:
2552
3520
if attr not in exclude:
2553
3521
client_dict[attr] = getattr(client, attr)
2554
3522
2555
3523
clients[client.name] = client_dict
2556
3524
del client_settings[client.name]["secret"]
2557
3525
2558
3526
try:
2559
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2560
prefix="clients-",
2561
dir=os.path.dirname
2562
(stored_state_path))
2563
with os.fdopen(tempfd, "wb") as stored_state:
2564
pickle.dump((clients, client_settings), stored_state)
3527
with tempfile.NamedTemporaryFile(
3528
mode='wb',
3529
suffix=".pickle",
3530
prefix='clients-',
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3534
protocol=2)
3535
tempname = stored_state.name
2565
3536
os.rename(tempname, stored_state_path)
2566
3537
except (IOError, OSError) as e:
2567
3538
if not debug:
2570
3541
except NameError:
2571
3542
pass
2572
3543
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2573
logger.warning("Could not save persistent state: {0}"
3544
logger.warning("Could not save persistent state: {}"
2574
3545
.format(os.strerror(e.errno)))
2575
3546
else:
2576
3547
logger.warning("Could not save persistent state:",
2577
3548
exc_info=e)
2578
raise e
2579
3549
raise
3550
2580
3551
# Delete all clients, and settings from config
2581
3552
while tcp_server.clients:
2582
3553
name, client = tcp_server.clients.popitem()
2583
3554
if use_dbus:
2584
3555
client.remove_from_connection()
2585
# Don't signal anything except ClientRemoved
3556
# Don't signal the disabling
2586
3557
client.disable(quiet=True)
3558
# Emit D-Bus signal for removal
2587
3559
if use_dbus:
2588
# Emit D-Bus signal
2589
mandos_dbus_service.ClientRemoved(client
2590
.dbus_object_path,
2591
client.name)
3560
mandos_dbus_service.client_removed_signal(client)
2592
3561
client_settings.clear()
2593
3562
2594
3563
atexit.register(cleanup)
2595
2596
for client in tcp_server.clients.itervalues():
3564
3565
for client in tcp_server.clients.values():
2597
3566
if use_dbus:
2598
# Emit D-Bus signal
2599
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3567
# Emit D-Bus signal for adding
3568
mandos_dbus_service.client_added_signal(client)
2600
3569
# Need to initiate checking of clients
2601
3570
if client.enabled:
2602
3571
client.init_checker()
2603
3572
2604
3573
tcp_server.enable()
2605
3574
tcp_server.server_activate()
2606
3575
2607
3576
# Find out what port we got
2608
service.port = tcp_server.socket.getsockname()[1]
3577
if zeroconf:
3578
service.port = tcp_server.socket.getsockname()[1]
2609
3579
if use_ipv6:
2610
3580
logger.info("Now listening on address %r, port %d,"
2611
3581
" flowinfo %d, scope_id %d",
2613
3583
else: # IPv4
2614
3584
logger.info("Now listening on address %r, port %d",
2615
3585
*tcp_server.socket.getsockname())
2616
2617
#service.interface = tcp_server.socket.getsockname()[3]
2618
3586
3587
# service.interface = tcp_server.socket.getsockname()[3]
3588
2619
3589
try:
2620
# From the Avahi example code
2621
try:
2622
service.activate()
2623
except dbus.exceptions.DBusException as error:
2624
logger.critical("D-Bus Exception", exc_info=error)
2625
cleanup()
2626
sys.exit(1)
2627
# End of Avahi example code
2628
2629
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2630
lambda *args, **kwargs:
2631
(tcp_server.handle_request
2632
(*args[2:], **kwargs) or True))
2633
3590
if zeroconf:
3591
# From the Avahi example code
3592
try:
3593
service.activate()
3594
except dbus.exceptions.DBusException as error:
3595
logger.critical("D-Bus Exception", exc_info=error)
3596
cleanup()
3597
sys.exit(1)
3598
# End of Avahi example code
3599
3600
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3601
lambda *args, **kwargs:
3602
(tcp_server.handle_request
3603
(*args[2:], **kwargs) or True))
3604
2634
3605
logger.debug("Starting main loop")
2635
3606
main_loop.run()
2636
3607
except AvahiError as error:
2645
3616
# Must run before the D-Bus bus name gets deregistered
2646
3617
cleanup()
2647
3618
3619
2648
3620
if __name__ == '__main__':
2649
3621
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0