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- Committer: Teddy Hogeborn
- Date: 2011-08-17 22:46:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110817224635-l83agxniozmovv6m
* Makefile (LDFLAGS): Added "-Xlinker --as-needed".
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2019 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
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
import gi
84
from gi.repository import GLib
68
import gobject
69
import avahi
85
70
from dbus.mainloop.glib import DBusGMainLoop
86
71
import ctypes
87
72
import ctypes.util
88
73
import xml.dom.minidom
89
74
import inspect
90
75
91
# Try to find the value of SO_BINDTODEVICE:
92
76
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:
95
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
96
78
except AttributeError:
97
79
try:
98
# This is where SO_BINDTODEVICE was up to and including Python
99
# 2.6, and also 3.2:
100
80
from IN import SO_BINDTODEVICE
101
81
except ImportError:
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"
123
stored_state_file = "clients.pickle"
124
125
logger = logging.getLogger()
126
syslogger = None
127
128
try:
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
131
except (OSError, AttributeError):
132
133
def if_nametoindex(interface):
134
"Get an interface index the hard way, i.e. using fcntl()"
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
136
with contextlib.closing(socket.socket()) as s:
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
140
return interface_index
141
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
159
def initlogger(debug, level=logging.WARNING):
160
"""init logger and add loglevel"""
161
162
global syslogger
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
165
address="/dev/log"))
166
syslogger.setFormatter(logging.Formatter
167
('Mandos [%(process)d]: %(levelname)s:'
168
' %(message)s'))
169
logger.addHandler(syslogger)
170
171
if debug:
172
console = logging.StreamHandler()
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
174
' [%(process)d]:'
175
' %(levelname)s:'
176
' %(message)s'))
177
logger.addHandler(console)
178
logger.setLevel(level)
179
180
181
class PGPError(Exception):
182
"""Exception if encryption/decryption fails"""
183
pass
184
185
186
class PGPEngine(object):
187
"""A simple class for OpenPGP symmetric encryption & decryption"""
188
189
def __init__(self):
190
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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
210
def __enter__(self):
211
return self
212
213
def __exit__(self, exc_type, exc_value, traceback):
214
self._cleanup()
215
return False
216
217
def __del__(self):
218
self._cleanup()
219
220
def _cleanup(self):
221
if self.tempdir is not None:
222
# Delete contents of tempdir
223
for root, dirs, files in os.walk(self.tempdir,
224
topdown=False):
225
for filename in files:
226
os.remove(os.path.join(root, filename))
227
for dirname in dirs:
228
os.rmdir(os.path.join(root, dirname))
229
# Remove tempdir
230
os.rmdir(self.tempdir)
231
self.tempdir = None
232
233
def password_encode(self, password):
234
# Passphrase can not be empty and can not contain newlines or
235
# NUL bytes. So we prefix it and hex encode it.
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
244
def encrypt(self, data, password):
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)
260
return ciphertext
261
262
def decrypt(self, data, password):
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)
278
return decrypted_plaintext
279
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
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
306
102
307
103
class AvahiError(Exception):
308
104
def __init__(self, value, *args, **kwargs):
309
105
self.value = value
310
return super(AvahiError, self).__init__(value, *args,
311
**kwargs)
312
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
313
109
314
110
class AvahiServiceError(AvahiError):
315
111
pass
316
112
317
318
113
class AvahiGroupError(AvahiError):
319
114
pass
320
115
321
116
322
117
class AvahiService(object):
323
118
"""An Avahi (Zeroconf) service.
324
119
325
120
Attributes:
326
121
interface: integer; avahi.IF_UNSPEC or an interface index.
327
122
Used to optionally bind to the specified interface.
328
123
name: string; Example: 'Mandos'
329
124
type: string; Example: '_mandos._tcp'.
330
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
331
126
port: integer; what port to announce
332
127
TXT: list of strings; TXT record for the service
333
128
domain: string; Domain to publish on, default to .local if empty.
339
134
server: D-Bus Server
340
135
bus: dbus.SystemBus()
341
136
"""
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):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
354
141
self.interface = interface
355
142
self.name = name
356
143
self.type = servicetype
365
152
self.server = None
366
153
self.bus = bus
367
154
self.entry_group_state_changed_match = None
368
369
def rename(self, remove=True):
155
def rename(self):
370
156
"""Derived from the Avahi example code"""
371
157
if self.rename_count >= self.max_renames:
372
158
logger.critical("No suitable Zeroconf service name found"
373
159
" after %i retries, exiting.",
374
160
self.rename_count)
375
161
raise AvahiServiceError("Too many renames")
376
self.name = str(
377
self.server.GetAlternativeServiceName(self.name))
378
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
379
163
logger.info("Changing Zeroconf service name to %r ...",
380
164
self.name)
381
if remove:
382
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
383
170
try:
384
171
self.add()
385
172
except dbus.exceptions.DBusException as error:
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
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
395
177
def remove(self):
396
178
"""Derived from the Avahi example code"""
397
179
if self.entry_group_state_changed_match is not None:
399
181
self.entry_group_state_changed_match = None
400
182
if self.group is not None:
401
183
self.group.Reset()
402
403
184
def add(self):
404
185
"""Derived from the Avahi example code"""
405
186
self.remove()
410
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
411
192
self.entry_group_state_changed_match = (
412
193
self.group.connect_to_signal(
413
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
414
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
415
196
self.name, self.type)
416
197
self.group.AddService(
422
203
dbus.UInt16(self.port),
423
204
avahi.string_array_to_txt_array(self.TXT))
424
205
self.group.Commit()
425
426
206
def entry_group_state_changed(self, state, error):
427
207
"""Derived from the Avahi example code"""
428
208
logger.debug("Avahi entry group state change: %i", state)
429
209
430
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
431
211
logger.debug("Zeroconf service established.")
432
212
elif state == avahi.ENTRY_GROUP_COLLISION:
434
214
self.rename()
435
215
elif state == avahi.ENTRY_GROUP_FAILURE:
436
216
logger.critical("Avahi: Error in group state changed %s",
437
str(error))
438
raise AvahiGroupError("State changed: {!s}".format(error))
439
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
440
220
def cleanup(self):
441
221
"""Derived from the Avahi example code"""
442
222
if self.group is not None:
443
223
try:
444
224
self.group.Free()
445
225
except (dbus.exceptions.UnknownMethodException,
446
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
447
227
pass
448
228
self.group = None
449
229
self.remove()
450
451
230
def server_state_changed(self, state, error=None):
452
231
"""Derived from the Avahi example code"""
453
232
logger.debug("Avahi server state change: %i", state)
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
}
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
460
240
if state in bad_states:
461
241
if bad_states[state] is not None:
462
242
if error is None:
465
245
logger.error(bad_states[state] + ": %r", error)
466
246
self.cleanup()
467
247
elif state == avahi.SERVER_RUNNING:
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)
248
self.add()
480
249
else:
481
250
if error is None:
482
251
logger.debug("Unknown state: %r", state)
483
252
else:
484
253
logger.debug("Unknown state: %r: %r", state, error)
485
486
254
def activate(self):
487
255
"""Derived from the Avahi example code"""
488
256
if self.server is None:
492
260
follow_name_owner_changes=True),
493
261
avahi.DBUS_INTERFACE_SERVER)
494
262
self.server.connect_to_signal("StateChanged",
495
self.server_state_changed)
263
self.server_state_changed)
496
264
self.server_state_changed(self.server.GetState())
497
265
498
266
499
class AvahiServiceToSyslog(AvahiService):
500
def rename(self, *args, **kwargs):
501
"""Add the new name to the syslog messages"""
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)))
506
return ret
507
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
820
821
267
class Client(object):
822
268
"""A representation of a client host served by this server.
823
269
824
270
Attributes:
825
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
826
272
approval_delay: datetime.timedelta(); Time to wait for approval
827
273
approval_duration: datetime.timedelta(); Duration of one approval
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
274
checker: subprocess.Popen(); a running checker process used
275
to see if the client lives.
276
'None' if no process is running.
277
checker_callback_tag: a gobject event source tag, or None
832
278
checker_command: string; External command which is run to check
833
279
if client lives. %() expansions are done at
834
280
runtime with vars(self) as dict, so that for
835
281
instance %(name)s can be used in the command.
836
checker_initiator_tag: a GLib event source tag, or None
282
checker_initiator_tag: a gobject event source tag, or None
837
283
created: datetime.datetime(); (UTC) object creation
838
client_structure: Object describing what attributes a client has
839
and is used for storing the client at exit
840
284
current_checker_command: string; current running checker_command
841
disable_initiator_tag: a GLib event source tag, or None
285
disable_hook: If set, called by disable() as disable_hook(self)
286
disable_initiator_tag: a gobject event source tag, or None
842
287
enabled: bool()
843
288
fingerprint: string (40 or 32 hexadecimal digits); used to
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
289
uniquely identify the client
847
290
host: string; available for use by the checker command
848
291
interval: datetime.timedelta(); How often to start a new checker
849
292
last_approval_request: datetime.datetime(); (UTC) or None
850
293
last_checked_ok: datetime.datetime(); (UTC) or None
851
last_checker_status: integer between 0 and 255 reflecting exit
852
status of last checker. -1 reflects crashed
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
856
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
857
295
name: string; from the config file, used in log messages and
858
296
D-Bus identifiers
859
297
secret: bytestring; sent verbatim (over TLS) to client
860
298
timeout: datetime.timedelta(); How long from last_checked_ok
861
299
until this client is disabled
862
extended_timeout: extra long timeout when secret has been sent
863
300
runtime_expansions: Allowed attributes for runtime expansion.
864
expires: datetime.datetime(); time (UTC) when a client will be
865
disabled, or None
866
server_settings: The server_settings dict from main()
867
301
"""
868
302
869
303
runtime_expansions = ("approval_delay", "approval_duration",
870
"created", "enabled", "expires", "key_id",
871
"fingerprint", "host", "interval",
872
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
873
306
"last_enabled", "name", "timeout")
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
307
886
308
@staticmethod
887
def config_parser(config):
888
"""Construct a new dict of client settings of this form:
889
{ client_name: {setting_name: value, ...}, ...}
890
with exceptions for any special settings as defined above.
891
NOTE: Must be a pure function. Must return the same result
892
value given the same arguments.
893
"""
894
settings = {}
895
for client_name in config.sections():
896
section = dict(config.items(client_name))
897
client = settings[client_name] = {}
898
899
client["host"] = section["host"]
900
# Reformat values from string types to Python types
901
client["approved_by_default"] = config.getboolean(
902
client_name, "approved_by_default")
903
client["enabled"] = config.getboolean(client_name,
904
"enabled")
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(" ", ""))
911
client["fingerprint"] = (section["fingerprint"].upper()
912
.replace(" ", ""))
913
if "secret" in section:
914
client["secret"] = codecs.decode(section["secret"]
915
.encode("utf-8"),
916
"base64")
917
elif "secfile" in section:
918
with open(os.path.expanduser(os.path.expandvars
919
(section["secfile"])),
920
"rb") as secfile:
921
client["secret"] = secfile.read()
922
else:
923
raise TypeError("No secret or secfile for section {}"
924
.format(section))
925
client["timeout"] = string_to_delta(section["timeout"])
926
client["extended_timeout"] = string_to_delta(
927
section["extended_timeout"])
928
client["interval"] = string_to_delta(section["interval"])
929
client["approval_delay"] = string_to_delta(
930
section["approval_delay"])
931
client["approval_duration"] = string_to_delta(
932
section["approval_duration"])
933
client["checker_command"] = section["checker"]
934
client["last_approval_request"] = None
935
client["last_checked_ok"] = None
936
client["last_checker_status"] = -2
937
938
return settings
939
940
def __init__(self, settings, name=None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
314
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
318
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
322
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
941
330
self.name = name
942
if server_settings is None:
943
server_settings = {}
944
self.server_settings = server_settings
945
# adding all client settings
946
for setting, value in settings.items():
947
setattr(self, setting, value)
948
949
if self.enabled:
950
if not hasattr(self, "last_enabled"):
951
self.last_enabled = datetime.datetime.utcnow()
952
if not hasattr(self, "expires"):
953
self.expires = (datetime.datetime.utcnow()
954
+ self.timeout)
955
else:
956
self.last_enabled = None
957
self.expires = None
958
331
if config is None:
332
config = {}
959
333
logger.debug("Creating client %r", self.name)
960
logger.debug(" Key ID: %s", self.key_id)
334
# Uppercase and remove spaces from fingerprint for later
335
# comparison purposes with return value from the fingerprint()
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
961
339
logger.debug(" Fingerprint: %s", self.fingerprint)
962
self.created = settings.get("created",
963
datetime.datetime.utcnow())
964
965
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
966
359
self.checker = None
967
360
self.checker_initiator_tag = None
968
361
self.disable_initiator_tag = None
969
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
970
364
self.current_checker_command = None
971
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
972
369
self.approvals_pending = 0
973
self.changedstate = multiprocessing_manager.Condition(
974
multiprocessing_manager.Lock())
975
self.client_structure = [attr
976
for attr in self.__dict__.keys()
977
if not attr.startswith("_")]
978
self.client_structure.append("client_structure")
979
980
for name, t in inspect.getmembers(
981
type(self), lambda obj: isinstance(obj, property)):
982
if not name.startswith("_"):
983
self.client_structure.append(name)
984
985
# Send notice to process children that client state has changed
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
375
986
376
def send_changedstate(self):
987
with self.changedstate:
988
self.changedstate.notify_all()
989
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
990
381
def enable(self):
991
382
"""Start this client's checker and timeout hooks"""
992
383
if getattr(self, "enabled", False):
993
384
# Already enabled
994
385
return
995
self.expires = datetime.datetime.utcnow() + self.timeout
996
self.enabled = True
386
self.send_changedstate()
997
387
self.last_enabled = datetime.datetime.utcnow()
998
self.init_checker()
999
self.send_changedstate()
1000
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
396
self.disable))
397
self.enabled = True
398
# Also start a new checker *right now*.
399
self.start_checker()
400
1001
401
def disable(self, quiet=True):
1002
402
"""Disable this client."""
1003
403
if not getattr(self, "enabled", False):
1004
404
return False
1005
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
1006
408
logger.info("Disabling client %s", self.name)
1007
if getattr(self, "disable_initiator_tag", None) is not None:
1008
GLib.source_remove(self.disable_initiator_tag)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
1009
411
self.disable_initiator_tag = None
1010
self.expires = None
1011
if getattr(self, "checker_initiator_tag", None) is not None:
1012
GLib.source_remove(self.checker_initiator_tag)
412
if getattr(self, "checker_initiator_tag", False):
413
gobject.source_remove(self.checker_initiator_tag)
1013
414
self.checker_initiator_tag = None
1014
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
1015
418
self.enabled = False
1016
if not quiet:
1017
self.send_changedstate()
1018
# Do not run this again if called by a GLib.timeout_add
419
# Do not run this again if called by a gobject.timeout_add
1019
420
return False
1020
421
1021
422
def __del__(self):
423
self.disable_hook = None
1022
424
self.disable()
1023
1024
def init_checker(self):
1025
# Schedule a new checker to be started an 'interval' from now,
1026
# and every interval from then on.
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)
1032
# Schedule a disable() when 'timeout' has passed
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)
1037
# Also start a new checker *right now*.
1038
self.start_checker()
1039
1040
def checker_callback(self, source, condition, connection,
1041
command):
425
426
def checker_callback(self, pid, condition, command):
1042
427
"""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()
1047
428
self.checker_callback_tag = None
1048
429
self.checker = None
1049
1050
if returncode >= 0:
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
1053
if self.last_checker_status == 0:
430
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
1054
433
logger.info("Checker for %(name)s succeeded",
1055
434
vars(self))
1056
435
self.checked_ok()
1057
436
else:
1058
logger.info("Checker for %(name)s failed", vars(self))
437
logger.info("Checker for %(name)s failed",
438
vars(self))
1059
439
else:
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
1062
440
logger.warning("Checker for %(name)s crashed?",
1063
441
vars(self))
1064
return False
1065
442
1066
443
def checked_ok(self):
1067
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
1068
449
self.last_checked_ok = datetime.datetime.utcnow()
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
1071
self.bump_timeout()
1072
1073
def bump_timeout(self, timeout=None):
1074
"""Bump up the timeout for this client."""
1075
if timeout is None:
1076
timeout = self.timeout
1077
if self.disable_initiator_tag is not None:
1078
GLib.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1080
if getattr(self, "enabled", False):
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
1083
self.expires = datetime.datetime.utcnow() + timeout
1084
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
454
1085
455
def need_approval(self):
1086
456
self.last_approval_request = datetime.datetime.utcnow()
1087
457
1088
458
def start_checker(self):
1089
459
"""Start a new checker subprocess if one is not running.
1090
460
1091
461
If a checker already exists, leave it running and do
1092
462
nothing."""
1093
463
# The reason for not killing a running checker is that if we
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
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
1098
468
# checkers alone, the checker would have to take more time
1099
469
# than 'timeout' for the client to be disabled, which is as it
1100
470
# should be.
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
471
472
# If a checker exists, make sure it is not a zombie
473
try:
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
479
else:
480
if pid:
481
logger.warning("Checker was a zombie")
482
gobject.source_remove(self.checker_callback_tag)
483
self.checker_callback(pid, status,
484
self.current_checker_command)
1106
485
# Start a new checker if needed
1107
486
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}
1112
487
try:
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
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
1119
506
self.current_checker_command = command
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
507
try:
508
logger.info("Starting checker %r for %s",
509
command, self.name)
510
# We don't need to redirect stdout and stderr, since
511
# in normal mode, that is already done by daemon(),
512
# and in debug mode we don't want to. (Stdin is
513
# always replaced by /dev/null.)
514
self.checker = subprocess.Popen(command,
515
close_fds=True,
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
527
except OSError as error:
528
logger.error("Failed to start subprocess: %s",
529
error)
530
# Re-run this periodically if run by gobject.timeout_add
1146
531
return True
1147
532
1148
533
def stop_checker(self):
1149
534
"""Force the checker process, if any, to stop."""
1150
535
if self.checker_callback_tag:
1151
GLib.source_remove(self.checker_callback_tag)
536
gobject.source_remove(self.checker_callback_tag)
1152
537
self.checker_callback_tag = None
1153
538
if getattr(self, "checker", None) is None:
1154
539
return
1155
540
logger.debug("Stopping checker for %(name)s", vars(self))
1156
self.checker.terminate()
541
try:
542
os.kill(self.checker.pid, signal.SIGTERM)
543
#time.sleep(0.5)
544
#if self.checker.poll() is None:
545
# os.kill(self.checker.pid, signal.SIGKILL)
546
except OSError as error:
547
if error.errno != errno.ESRCH: # No such process
548
raise
1157
549
self.checker = None
1158
550
1159
1160
def dbus_service_property(dbus_interface,
1161
signature="v",
1162
access="readwrite",
1163
byte_arrays=False):
551
def dbus_service_property(dbus_interface, signature="v",
552
access="readwrite", byte_arrays=False):
1164
553
"""Decorators for marking methods of a DBusObjectWithProperties to
1165
554
become properties on the D-Bus.
1166
555
1167
556
The decorated method will be called with no arguments by "Get"
1168
557
and with one argument by "Set".
1169
558
1170
559
The parameters, where they are supported, are the same as
1171
560
dbus.service.method, except there is only "signature", since the
1172
561
type from Get() and the type sent to Set() is the same.
1175
564
# "Set" method, so we fail early here:
1176
565
if byte_arrays and signature != "ay":
1177
566
raise ValueError("Byte arrays not supported for non-'ay'"
1178
" signature {!r}".format(signature))
1179
567
" signature %r" % signature)
1180
568
def decorator(func):
1181
569
func._dbus_is_property = True
1182
570
func._dbus_interface = dbus_interface
1185
573
func._dbus_name = func.__name__
1186
574
if func._dbus_name.endswith("_dbus_property"):
1187
575
func._dbus_name = func._dbus_name[:-14]
1188
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1189
return func
1190
1191
return decorator
1192
1193
1194
def dbus_interface_annotations(dbus_interface):
1195
"""Decorator for marking functions returning interface annotations
1196
1197
Usage:
1198
1199
@dbus_interface_annotations("org.example.Interface")
1200
def _foo(self): # Function name does not matter
1201
return {"org.freedesktop.DBus.Deprecated": "true",
1202
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1203
"false"}
1204
"""
1205
1206
def decorator(func):
1207
func._dbus_is_interface = True
1208
func._dbus_interface = dbus_interface
1209
func._dbus_name = dbus_interface
1210
return func
1211
1212
return decorator
1213
1214
1215
def dbus_annotations(annotations):
1216
"""Decorator to annotate D-Bus methods, signals or properties
1217
Usage:
1218
1219
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1220
"org.freedesktop.DBus.Property."
1221
"EmitsChangedSignal": "false"})
1222
@dbus_service_property("org.example.Interface", signature="b",
1223
access="r")
1224
def Property_dbus_property(self):
1225
return dbus.Boolean(False)
1226
1227
See also the DBusObjectWithAnnotations class.
1228
"""
1229
1230
def decorator(func):
1231
func._dbus_annotations = annotations
1232
return func
1233
576
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
577
return func
1234
578
return decorator
1235
579
1236
580
1237
581
class DBusPropertyException(dbus.exceptions.DBusException):
1238
582
"""A base class for D-Bus property-related exceptions
1239
583
"""
1240
pass
584
def __unicode__(self):
585
return unicode(str(self))
1241
586
1242
587
1243
588
class DBusPropertyAccessException(DBusPropertyException):
1252
597
pass
1253
598
1254
599
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.
1260
"""
1261
1262
@staticmethod
1263
def _is_dbus_thing(thing):
1264
"""Returns a function testing if an attribute is a D-Bus thing
1265
1266
If called like _is_dbus_thing("method") it returns a function
1267
suitable for use as predicate to inspect.getmembers().
1268
"""
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1270
False)
1271
1272
def _get_all_dbus_things(self, thing):
1273
"""Returns a generator of (name, attribute) pairs
1274
"""
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
1276
athing.__get__(self))
1277
for cls in self.__class__.__mro__
1278
for name, athing in
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):
600
class DBusObjectWithProperties(dbus.service.Object):
1345
601
"""A D-Bus object with properties.
1346
602
1347
603
Classes inheriting from this can use the dbus_service_property
1348
604
decorator to expose methods as D-Bus properties. It exposes the
1349
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
1350
606
"""
1351
607
608
@staticmethod
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
611
612
def _get_all_dbus_properties(self):
613
"""Returns a generator of (name, attribute) pairs
614
"""
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
618
1352
619
def _get_dbus_property(self, interface_name, property_name):
1353
620
"""Returns a bound method if one exists which is a D-Bus
1354
621
property with the specified name and interface.
1355
622
"""
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
1359
if (value._dbus_name == property_name
1360
and value._dbus_interface == interface_name):
1361
return value.__get__(self)
1362
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
1363
633
# No such property
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",
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
+ interface_name + "."
636
+ property_name)
637
638
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1378
639
out_signature="v")
1379
640
def Get(self, interface_name, property_name):
1380
641
"""Standard D-Bus property Get() method, see D-Bus standard.
1386
647
if not hasattr(value, "variant_level"):
1387
648
return value
1388
649
return type(value)(value, variant_level=value.variant_level+1)
1389
650
1390
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1391
652
def Set(self, interface_name, property_name, value):
1392
653
"""Standard D-Bus property Set() method, see D-Bus standard.
1398
659
# The byte_arrays option is not supported yet on
1399
660
# signatures other than "ay".
1400
661
if prop._dbus_signature != "ay":
1401
raise ValueError("Byte arrays not supported for non-"
1402
"'ay' signature {!r}"
1403
.format(prop._dbus_signature))
1404
value = dbus.ByteArray(b''.join(chr(byte)
1405
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
1406
665
prop(value)
1407
1408
@dbus.service.method(dbus.PROPERTIES_IFACE,
1409
in_signature="s",
666
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1410
668
out_signature="a{sv}")
1411
669
def GetAll(self, interface_name):
1412
670
"""Standard D-Bus property GetAll() method, see D-Bus
1414
672
1415
673
Note: Will not include properties with access="write".
1416
674
"""
1417
properties = {}
1418
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
1419
677
if (interface_name
1420
678
and interface_name != prop._dbus_interface):
1421
679
# Interface non-empty but did not match
1425
683
continue
1426
684
value = prop()
1427
685
if not hasattr(value, "variant_level"):
1428
properties[name] = value
686
all[name] = value
1429
687
continue
1430
properties[name] = type(value)(
1431
value, variant_level=value.variant_level + 1)
1432
return dbus.Dictionary(properties, signature="sv")
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
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
691
1442
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1443
693
out_signature="s",
1444
694
path_keyword='object_path',
1445
695
connection_keyword='connection')
1446
696
def Introspect(self, object_path, connection):
1447
"""Overloading of standard D-Bus method.
1448
1449
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
1450
698
"""
1451
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1452
object_path,
1453
connection)
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
700
connection)
1454
701
try:
1455
702
document = xml.dom.minidom.parseString(xmlstring)
1456
1457
703
def make_tag(document, name, prop):
1458
704
e = document.createElement("property")
1459
705
e.setAttribute("name", name)
1460
706
e.setAttribute("type", prop._dbus_signature)
1461
707
e.setAttribute("access", prop._dbus_access)
1462
708
return e
1463
1464
709
for if_tag in document.getElementsByTagName("interface"):
1465
# Add property tags
1466
710
for tag in (make_tag(document, name, prop)
1467
711
for name, prop
1468
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
1469
713
if prop._dbus_interface
1470
714
== if_tag.getAttribute("name")):
1471
715
if_tag.appendChild(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)
1488
716
# Add the names to the return values for the
1489
717
# "org.freedesktop.DBus.Properties" methods
1490
718
if (if_tag.getAttribute("name")
1505
733
except (AttributeError, xml.dom.DOMException,
1506
734
xml.parsers.expat.ExpatError) as error:
1507
735
logger.error("Failed to override Introspection method",
1508
exc_info=error)
1509
return xmlstring
1510
1511
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):
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1585
if dt is None:
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).
1612
"""
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):
1621
# Ignore non-D-Bus attributes, and D-Bus attributes
1622
# with the wrong interface name
1623
if (not hasattr(attribute, "_dbus_interface")
1624
or not attribute._dbus_interface.startswith(
1625
orig_interface_name)):
1626
continue
1627
# Create an alternate D-Bus interface name based on
1628
# the current name
1629
alt_interface = attribute._dbus_interface.replace(
1630
orig_interface_name, alt_interface_name)
1631
interface_names.add(alt_interface)
1632
# Is this a D-Bus signal?
1633
if getattr(attribute, "_dbus_is_signal", False):
1634
# Extract the original non-method undecorated
1635
# function by black magic
1636
if sys.version_info.major == 2:
1637
nonmethod_func = (dict(
1638
zip(attribute.func_code.co_freevars,
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)
1646
# Create a new, but exactly alike, function
1647
# object, and decorate it to be a new D-Bus signal
1648
# with the alternate D-Bus interface name
1649
new_function = copy_function(nonmethod_func)
1650
new_function = (dbus.service.signal(
1651
alt_interface,
1652
attribute._dbus_signature)(new_function))
1653
# Copy annotations, if any
1654
try:
1655
new_function._dbus_annotations = dict(
1656
attribute._dbus_annotations)
1657
except AttributeError:
1658
pass
1659
1660
# Define a creator of a function to call both the
1661
# original and alternate functions, so both the
1662
# original and alternate signals gets sent when
1663
# the function is called
1664
def fixscope(func1, func2):
1665
"""This function is a scope container to pass
1666
func1 and func2 to the "call_both" function
1667
outside of its arguments"""
1668
1669
@functools.wraps(func2)
1670
def call_both(*args, **kwargs):
1671
"""This function will emit two D-Bus
1672
signals by calling func1 and func2"""
1673
func1(*args, **kwargs)
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
1681
return call_both
1682
# Create the "call_both" function and add it to
1683
# the class
1684
attr[attrname] = fixscope(attribute, new_function)
1685
# Is this a D-Bus method?
1686
elif getattr(attribute, "_dbus_is_method", False):
1687
# Create a new, but exactly alike, function
1688
# object. Decorate it to be a new D-Bus method
1689
# with the alternate D-Bus interface name. Add it
1690
# to the class.
1691
attr[attrname] = (
1692
dbus.service.method(
1693
alt_interface,
1694
attribute._dbus_in_signature,
1695
attribute._dbus_out_signature)
1696
(copy_function(attribute)))
1697
# Copy annotations, if any
1698
try:
1699
attr[attrname]._dbus_annotations = dict(
1700
attribute._dbus_annotations)
1701
except AttributeError:
1702
pass
1703
# Is this a D-Bus property?
1704
elif getattr(attribute, "_dbus_is_property", False):
1705
# Create a new, but exactly alike, function
1706
# object, and decorate it to be a new D-Bus
1707
# property with the alternate D-Bus interface
1708
# name. Add it to the class.
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)))
1715
# Copy annotations, if any
1716
try:
1717
attr[attrname]._dbus_annotations = dict(
1718
attribute._dbus_annotations)
1719
except AttributeError:
1720
pass
1721
# Is this a D-Bus interface?
1722
elif getattr(attribute, "_dbus_is_interface", False):
1723
# Create a new, but exactly alike, function
1724
# object. Decorate it to be a new D-Bus interface
1725
# with the alternate D-Bus interface name. Add it
1726
# to the class.
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"})
736
error)
737
return xmlstring
738
739
1761
740
class ClientDBus(Client, DBusObjectWithProperties):
1762
741
"""A Client class using D-Bus
1763
742
1764
743
Attributes:
1765
744
dbus_object_path: dbus.ObjectPath
1766
745
bus: dbus.SystemBus()
1767
746
"""
1768
747
1769
748
runtime_expansions = (Client.runtime_expansions
1770
+ ("dbus_object_path", ))
1771
1772
_interface = "se.recompile.Mandos.Client"
1773
749
+ ("dbus_object_path",))
750
1774
751
# dbus.service.Object doesn't use super(), so we can't either.
1775
1776
def __init__(self, bus=None, *args, **kwargs):
752
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1777
755
self.bus = bus
1778
756
Client.__init__(self, *args, **kwargs)
1779
757
# Only now, when this client is initialized, can it show up on
1780
758
# the D-Bus
1781
client_object_name = str(self.name).translate(
759
client_object_name = unicode(self.name).translate(
1782
760
{ord("."): ord("_"),
1783
761
ord("-"): ord("_")})
1784
self.dbus_object_path = dbus.ObjectPath(
1785
"/clients/" + client_object_name)
762
self.dbus_object_path = (dbus.ObjectPath
763
("/clients/" + client_object_name))
1786
764
DBusObjectWithProperties.__init__(self, self.bus,
1787
765
self.dbus_object_path)
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):
1794
""" Modify a variable so that it's a property which announces
1795
its changes to DBus.
1796
1797
transform_fun: Function that takes a value and a variant_level
1798
and transforms it to a D-Bus type.
1799
dbus_name: D-Bus name of the variable
1800
type_func: Function that transform the value before sending it
1801
to the D-Bus. Default: no transform
1802
variant_level: D-Bus variant level. Default: 1
1803
"""
1804
attrname = "_{}".format(dbus_name)
1805
1806
def setter(self, value):
1807
if hasattr(self, "dbus_object_path"):
1808
if (not hasattr(self, attrname) or
1809
type_func(getattr(self, attrname, None))
1810
!= type_func(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())
1826
setattr(self, attrname, value)
1827
1828
return property(lambda self: getattr(self, attrname), setter)
1829
1830
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1831
approvals_pending = notifychangeproperty(dbus.Boolean,
1832
"ApprovalPending",
1833
type_func=bool)
1834
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1835
last_enabled = notifychangeproperty(datetime_to_dbus,
1836
"LastEnabled")
1837
checker = notifychangeproperty(
1838
dbus.Boolean, "CheckerRunning",
1839
type_func=lambda checker: checker is not None)
1840
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1841
"LastCheckedOK")
1842
last_checker_status = notifychangeproperty(dbus.Int16,
1843
"LastCheckerStatus")
1844
last_approval_request = notifychangeproperty(
1845
datetime_to_dbus, "LastApprovalRequest")
1846
approved_by_default = notifychangeproperty(dbus.Boolean,
1847
"ApprovedByDefault")
1848
approval_delay = notifychangeproperty(
1849
dbus.UInt64, "ApprovalDelay",
1850
type_func=lambda td: td.total_seconds() * 1000)
1851
approval_duration = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDuration",
1853
type_func=lambda td: td.total_seconds() * 1000)
1854
host = notifychangeproperty(dbus.String, "Host")
1855
timeout = notifychangeproperty(
1856
dbus.UInt64, "Timeout",
1857
type_func=lambda td: td.total_seconds() * 1000)
1858
extended_timeout = notifychangeproperty(
1859
dbus.UInt64, "ExtendedTimeout",
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)
1864
checker_command = notifychangeproperty(dbus.String, "Checker")
1865
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1866
invalidate_only=True)
1867
1868
del notifychangeproperty
1869
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
810
1870
811
def __del__(self, *args, **kwargs):
1871
812
try:
1872
813
self.remove_from_connection()
1875
816
if hasattr(DBusObjectWithProperties, "__del__"):
1876
817
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1877
818
Client.__del__(self, *args, **kwargs)
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:
819
820
def checker_callback(self, pid, condition, command,
821
*args, **kwargs):
822
self.checker_callback_tag = None
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
827
if os.WIFEXITED(condition):
828
exitstatus = os.WEXITSTATUS(condition)
1886
829
# Emit D-Bus signal
1887
830
self.CheckerCompleted(dbus.Int16(exitstatus),
1888
# This is specific to GNU libC
1889
dbus.Int64(exitstatus << 8),
831
dbus.Int64(condition),
1890
832
dbus.String(command))
1891
833
else:
1892
834
# Emit D-Bus signal
1893
835
self.CheckerCompleted(dbus.Int16(-1),
1894
dbus.Int64(
1895
# This is specific to GNU libC
1896
(exitstatus << 8)
1897
| self.last_checker_signal),
836
dbus.Int64(condition),
1898
837
dbus.String(command))
1899
return ret
1900
838
839
return Client.checker_callback(self, pid, condition, command,
840
*args, **kwargs)
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
858
1901
859
def start_checker(self, *args, **kwargs):
1902
old_checker_pid = getattr(self.checker, "pid", None)
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
863
else:
864
old_checker_pid = None
1903
865
r = Client.start_checker(self, *args, **kwargs)
1904
866
# Only if new checker process was started
1905
867
if (self.checker is not None
1906
868
and old_checker_pid != self.checker.pid):
1907
869
# Emit D-Bus signal
1908
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
874
return r
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
1909
883
return r
1910
884
1911
885
def _reset_approved(self):
1912
self.approved = None
886
self._approved = None
1913
887
return False
1914
888
1915
889
def approve(self, value=True):
1916
self.approved = value
1917
GLib.timeout_add(int(self.approval_duration.total_seconds()
1918
* 1000), self._reset_approved)
1919
890
self.send_changedstate()
1920
1921
# D-Bus methods, signals & properties
1922
1923
# Interfaces
1924
1925
# Signals
1926
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
899
900
## Signals
901
1927
902
# CheckerCompleted - signal
1928
903
@dbus.service.signal(_interface, signature="nxs")
1929
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1930
905
"D-Bus signal"
1931
906
pass
1932
907
1933
908
# CheckerStarted - signal
1934
909
@dbus.service.signal(_interface, signature="s")
1935
910
def CheckerStarted(self, command):
1936
911
"D-Bus signal"
1937
912
pass
1938
913
1939
914
# PropertyChanged - signal
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
915
@dbus.service.signal(_interface, signature="sv")
1942
916
def PropertyChanged(self, property, value):
1943
917
"D-Bus signal"
1944
918
pass
1945
919
1946
920
# GotSecret - signal
1947
921
@dbus.service.signal(_interface)
1948
922
def GotSecret(self):
1951
925
server to mandos-client
1952
926
"""
1953
927
pass
1954
928
1955
929
# Rejected - signal
1956
930
@dbus.service.signal(_interface, signature="s")
1957
931
def Rejected(self, reason):
1958
932
"D-Bus signal"
1959
933
pass
1960
934
1961
935
# NeedApproval - signal
1962
936
@dbus.service.signal(_interface, signature="tb")
1963
937
def NeedApproval(self, timeout, default):
1964
938
"D-Bus signal"
1965
939
return self.need_approval()
1966
1967
# Methods
1968
940
941
## Methods
942
1969
943
# Approve - method
1970
944
@dbus.service.method(_interface, in_signature="b")
1971
945
def Approve(self, value):
1972
946
self.approve(value)
1973
947
1974
948
# CheckedOK - method
1975
949
@dbus.service.method(_interface)
1976
950
def CheckedOK(self):
1977
951
self.checked_ok()
1978
952
1979
953
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1981
954
@dbus.service.method(_interface)
1982
955
def Enable(self):
1983
956
"D-Bus method"
1984
957
self.enable()
1985
958
1986
959
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1988
960
@dbus.service.method(_interface)
1989
961
def StartChecker(self):
1990
962
"D-Bus method"
1991
963
self.start_checker()
1992
964
1993
965
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1995
966
@dbus.service.method(_interface)
1996
967
def Disable(self):
1997
968
"D-Bus method"
1998
969
self.disable()
1999
970
2000
971
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2002
972
@dbus.service.method(_interface)
2003
973
def StopChecker(self):
2004
974
self.stop_checker()
2005
2006
# Properties
2007
975
976
## Properties
977
2008
978
# ApprovalPending - property
2009
979
@dbus_service_property(_interface, signature="b", access="read")
2010
980
def ApprovalPending_dbus_property(self):
2011
981
return dbus.Boolean(bool(self.approvals_pending))
2012
982
2013
983
# ApprovedByDefault - property
2014
@dbus_service_property(_interface,
2015
signature="b",
984
@dbus_service_property(_interface, signature="b",
2016
985
access="readwrite")
2017
986
def ApprovedByDefault_dbus_property(self, value=None):
2018
987
if value is None: # get
2019
988
return dbus.Boolean(self.approved_by_default)
2020
989
self.approved_by_default = bool(value)
2021
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
993
2022
994
# ApprovalDelay - property
2023
@dbus_service_property(_interface,
2024
signature="t",
995
@dbus_service_property(_interface, signature="t",
2025
996
access="readwrite")
2026
997
def ApprovalDelay_dbus_property(self, value=None):
2027
998
if value is None: # get
2028
return dbus.UInt64(self.approval_delay.total_seconds()
2029
* 1000)
999
return dbus.UInt64(self.approval_delay_milliseconds())
2030
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2031
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1004
2032
1005
# ApprovalDuration - property
2033
@dbus_service_property(_interface,
2034
signature="t",
1006
@dbus_service_property(_interface, signature="t",
2035
1007
access="readwrite")
2036
1008
def ApprovalDuration_dbus_property(self, value=None):
2037
1009
if value is None: # get
2038
return dbus.UInt64(self.approval_duration.total_seconds()
2039
* 1000)
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
2040
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2041
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1016
2042
1017
# Name - property
2043
@dbus_annotations(
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2045
1018
@dbus_service_property(_interface, signature="s", access="read")
2046
1019
def Name_dbus_property(self):
2047
1020
return dbus.String(self.name)
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
1021
2056
1022
# Fingerprint - property
2057
@dbus_annotations(
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2059
1023
@dbus_service_property(_interface, signature="s", access="read")
2060
1024
def Fingerprint_dbus_property(self):
2061
1025
return dbus.String(self.fingerprint)
2062
1026
2063
1027
# Host - property
2064
@dbus_service_property(_interface,
2065
signature="s",
1028
@dbus_service_property(_interface, signature="s",
2066
1029
access="readwrite")
2067
1030
def Host_dbus_property(self, value=None):
2068
1031
if value is None: # get
2069
1032
return dbus.String(self.host)
2070
self.host = str(value)
2071
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1037
2072
1038
# Created - property
2073
@dbus_annotations(
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2075
1039
@dbus_service_property(_interface, signature="s", access="read")
2076
1040
def Created_dbus_property(self):
2077
return datetime_to_dbus(self.created)
2078
1041
return dbus.String(self._datetime_to_dbus(self.created))
1042
2079
1043
# LastEnabled - property
2080
1044
@dbus_service_property(_interface, signature="s", access="read")
2081
1045
def LastEnabled_dbus_property(self):
2082
return datetime_to_dbus(self.last_enabled)
2083
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1049
2084
1050
# Enabled - property
2085
@dbus_service_property(_interface,
2086
signature="b",
1051
@dbus_service_property(_interface, signature="b",
2087
1052
access="readwrite")
2088
1053
def Enabled_dbus_property(self, value=None):
2089
1054
if value is None: # get
2092
1057
self.enable()
2093
1058
else:
2094
1059
self.disable()
2095
1060
2096
1061
# LastCheckedOK - property
2097
@dbus_service_property(_interface,
2098
signature="s",
1062
@dbus_service_property(_interface, signature="s",
2099
1063
access="readwrite")
2100
1064
def LastCheckedOK_dbus_property(self, value=None):
2101
1065
if value is not None:
2102
1066
self.checked_ok()
2103
1067
return
2104
return datetime_to_dbus(self.last_checked_ok)
2105
2106
# LastCheckerStatus - property
2107
@dbus_service_property(_interface, signature="n", access="read")
2108
def LastCheckerStatus_dbus_property(self):
2109
return dbus.Int16(self.last_checker_status)
2110
2111
# Expires - property
2112
@dbus_service_property(_interface, signature="s", access="read")
2113
def Expires_dbus_property(self):
2114
return datetime_to_dbus(self.expires)
2115
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1072
2116
1073
# LastApprovalRequest - property
2117
1074
@dbus_service_property(_interface, signature="s", access="read")
2118
1075
def LastApprovalRequest_dbus_property(self):
2119
return datetime_to_dbus(self.last_approval_request)
2120
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1081
2121
1082
# Timeout - property
2122
@dbus_service_property(_interface,
2123
signature="t",
1083
@dbus_service_property(_interface, signature="t",
2124
1084
access="readwrite")
2125
1085
def Timeout_dbus_property(self, value=None):
2126
1086
if value is None: # get
2127
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2128
old_timeout = self.timeout
1087
return dbus.UInt64(self.timeout_milliseconds())
2129
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
2130
# Reschedule disabling
2131
if self.enabled:
2132
now = datetime.datetime.utcnow()
2133
self.expires += self.timeout - old_timeout
2134
if self.expires <= now:
2135
# The timeout has passed
2136
self.disable()
2137
else:
2138
if (getattr(self, "disable_initiator_tag", None)
2139
is None):
2140
return
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
2146
# ExtendedTimeout - property
2147
@dbus_service_property(_interface,
2148
signature="t",
2149
access="readwrite")
2150
def ExtendedTimeout_dbus_property(self, value=None):
2151
if value is None: # get
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
2153
* 1000)
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2155
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1109
2156
1110
# Interval - property
2157
@dbus_service_property(_interface,
2158
signature="t",
1111
@dbus_service_property(_interface, signature="t",
2159
1112
access="readwrite")
2160
1113
def Interval_dbus_property(self, value=None):
2161
1114
if value is None: # get
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1115
return dbus.UInt64(self.interval_milliseconds())
2163
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
2164
1120
if getattr(self, "checker_initiator_tag", None) is None:
2165
1121
return
2166
if self.enabled:
2167
# Reschedule checker run
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
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
2172
1127
2173
1128
# Checker - property
2174
@dbus_service_property(_interface,
2175
signature="s",
1129
@dbus_service_property(_interface, signature="s",
2176
1130
access="readwrite")
2177
1131
def Checker_dbus_property(self, value=None):
2178
1132
if value is None: # get
2179
1133
return dbus.String(self.checker_command)
2180
self.checker_command = str(value)
2181
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1139
2182
1140
# CheckerRunning - property
2183
@dbus_service_property(_interface,
2184
signature="b",
1141
@dbus_service_property(_interface, signature="b",
2185
1142
access="readwrite")
2186
1143
def CheckerRunning_dbus_property(self, value=None):
2187
1144
if value is None: # get
2190
1147
self.start_checker()
2191
1148
else:
2192
1149
self.stop_checker()
2193
1150
2194
1151
# ObjectPath - property
2195
@dbus_annotations(
2196
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2197
"org.freedesktop.DBus.Deprecated": "true"})
2198
1152
@dbus_service_property(_interface, signature="o", access="read")
2199
1153
def ObjectPath_dbus_property(self):
2200
return self.dbus_object_path # is already a dbus.ObjectPath
2201
1154
return self.dbus_object_path # is already a dbus.ObjectPath
1155
2202
1156
# Secret = property
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)
1157
@dbus_service_property(_interface, signature="ay",
1158
access="write", byte_arrays=True)
2210
1159
def Secret_dbus_property(self, value):
2211
self.secret = bytes(value)
2212
1160
self.secret = str(value)
1161
2213
1162
del _interface
2214
1163
2215
1164
2216
1165
class ProxyClient(object):
2217
def __init__(self, child_pipe, key_id, fpr, address):
1166
def __init__(self, child_pipe, fpr, address):
2218
1167
self._pipe = child_pipe
2219
self._pipe.send(('init', key_id, fpr, address))
1168
self._pipe.send(('init', fpr, address))
2220
1169
if not self._pipe.recv():
2221
raise KeyError(key_id or fpr)
1170
raise KeyError()
2222
1171
2223
1172
def __getattribute__(self, name):
2224
if name == '_pipe':
1173
if(name == '_pipe'):
2225
1174
return super(ProxyClient, self).__getattribute__(name)
2226
1175
self._pipe.send(('getattr', name))
2227
1176
data = self._pipe.recv()
2228
1177
if data[0] == 'data':
2229
1178
return data[1]
2230
1179
if data[0] == 'function':
2231
2232
1180
def func(*args, **kwargs):
2233
1181
self._pipe.send(('funcall', name, args, kwargs))
2234
1182
return self._pipe.recv()[1]
2235
2236
1183
return func
2237
1184
2238
1185
def __setattr__(self, name, value):
2239
if name == '_pipe':
1186
if(name == '_pipe'):
2240
1187
return super(ProxyClient, self).__setattr__(name, value)
2241
1188
self._pipe.send(('setattr', name, value))
2242
1189
2243
1190
2244
1191
class ClientHandler(socketserver.BaseRequestHandler, object):
2245
1192
"""A class to handle client connections.
2246
1193
2247
1194
Instantiated once for each connection to handle it.
2248
1195
Note: This will run in its own forked process."""
2249
1196
2250
1197
def handle(self):
2251
1198
with contextlib.closing(self.server.child_pipe) as child_pipe:
2252
1199
logger.info("TCP connection from: %s",
2253
str(self.client_address))
1200
unicode(self.client_address))
2254
1201
logger.debug("Pipe FD: %d",
2255
1202
self.server.child_pipe.fileno())
2256
1203
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"))
1204
session = (gnutls.connection
1205
.ClientSession(self.request,
1206
gnutls.connection
1207
.X509Credentials()))
1208
1209
# Note: gnutls.connection.X509Credentials is really a
1210
# generic GnuTLS certificate credentials object so long as
1211
# no X.509 keys are added to it. Therefore, we can use it
1212
# here despite using OpenPGP certificates.
1213
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1215
# "+AES-256-CBC", "+SHA1",
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1217
# "+DHE-DSS"))
2263
1218
# Use a fallback default, since this MUST be set.
2264
1219
priority = self.server.gnutls_priority
2265
1220
if priority is None:
2266
1221
priority = "NORMAL"
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
2269
None)
1222
(gnutls.library.functions
1223
.gnutls_priority_set_direct(session._c_object,
1224
priority, None))
2270
1225
2271
1226
# Start communication using the Mandos protocol
2272
1227
# Get protocol number
2274
1229
logger.debug("Protocol version: %r", line)
2275
1230
try:
2276
1231
if int(line.strip().split()[0]) > 1:
2277
raise RuntimeError(line)
1232
raise RuntimeError
2278
1233
except (ValueError, IndexError, RuntimeError) as error:
2279
1234
logger.error("Unknown protocol version: %s", error)
2280
1235
return
2282
1237
# Start GnuTLS connection
2283
1238
try:
2284
1239
session.handshake()
2285
except gnutls.Error as error:
1240
except gnutls.errors.GNUTLSError as error:
2286
1241
logger.warning("Handshake failed: %s", error)
2287
1242
# Do not run session.bye() here: the session is not
2288
1243
# established. Just abandon the request.
2291
1246
2292
1247
approval_required = False
2293
1248
try:
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,
1249
try:
1250
fpr = self.fingerprint(self.peer_certificate
1251
(session))
1252
except (TypeError,
1253
gnutls.errors.GNUTLSError) as error:
1254
logger.warning("Bad certificate: %s", error)
1255
return
1256
logger.debug("Fingerprint: %s", fpr)
1257
1258
try:
1259
client = ProxyClient(child_pipe, fpr,
2316
1260
self.client_address)
2317
1261
except KeyError:
2318
1262
return
2319
1263
2320
1264
if client.approval_delay:
2321
1265
delay = client.approval_delay
2322
1266
client.approvals_pending += 1
2323
1267
approval_required = True
2324
1268
2325
1269
while True:
2326
1270
if not client.enabled:
2327
1271
logger.info("Client %s is disabled",
2328
client.name)
1272
client.name)
2329
1273
if self.server.use_dbus:
2330
1274
# Emit D-Bus signal
2331
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
2332
1276
return
2333
2334
if client.approved or not client.approval_delay:
2335
# We are approved or approval is disabled
1277
1278
if client._approved or not client.approval_delay:
1279
#We are approved or approval is disabled
2336
1280
break
2337
elif client.approved is None:
1281
elif client._approved is None:
2338
1282
logger.info("Client %s needs approval",
2339
1283
client.name)
2340
1284
if self.server.use_dbus:
2341
1285
# Emit D-Bus signal
2342
1286
client.NeedApproval(
2343
client.approval_delay.total_seconds()
2344
* 1000, client.approved_by_default)
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
2345
1289
else:
2346
1290
logger.warning("Client %s was not approved",
2347
1291
client.name)
2349
1293
# Emit D-Bus signal
2350
1294
client.Rejected("Denied")
2351
1295
return
2352
2353
# wait until timeout or approved
1296
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
2354
1299
time = datetime.datetime.now()
2355
1300
client.changedstate.acquire()
2356
client.changedstate.wait(delay.total_seconds())
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2357
1302
client.changedstate.release()
2358
1303
time2 = datetime.datetime.now()
2359
1304
if (time2 - time) >= delay:
2369
1314
break
2370
1315
else:
2371
1316
delay -= time2 - time
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
1317
1318
sent_size = 0
1319
while sent_size < len(client.secret):
1320
try:
1321
sent = session.send(client.secret[sent_size:])
1322
except gnutls.errors.GNUTLSError as error:
1323
logger.warning("gnutls send failed")
1324
return
1325
logger.debug("Sent: %d, remaining: %d",
1326
sent, len(client.secret)
1327
- (sent_size + sent))
1328
sent_size += sent
2379
1329
2380
1330
logger.info("Sending secret to %s", client.name)
2381
# bump the timeout using extended_timeout
2382
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
2383
1333
if self.server.use_dbus:
2384
1334
# Emit D-Bus signal
2385
1335
client.GotSecret()
2386
1336
2387
1337
finally:
2388
1338
if approval_required:
2389
1339
client.approvals_pending -= 1
2390
1340
try:
2391
1341
session.bye()
2392
except gnutls.Error as error:
2393
logger.warning("GnuTLS bye failed",
2394
exc_info=error)
2395
1342
except gnutls.errors.GNUTLSError as error:
1343
logger.warning("GnuTLS bye failed")
1344
2396
1345
@staticmethod
2397
1346
def peer_certificate(session):
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""
1347
"Return the peer's OpenPGP certificate as a bytestring"
1348
# If not an OpenPGP certificate...
1349
if (gnutls.library.functions
1350
.gnutls_certificate_type_get(session._c_object)
1351
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1352
# ...do the normal thing
1353
return session.peer_certificate
2414
1354
list_size = ctypes.c_uint(1)
2415
cert_list = (gnutls.certificate_get_peers
1355
cert_list = (gnutls.library.functions
1356
.gnutls_certificate_get_peers
2416
1357
(session._c_object, ctypes.byref(list_size)))
2417
1358
if not bool(cert_list) and list_size.value != 0:
2418
raise gnutls.Error("error getting peer certificate")
1359
raise gnutls.errors.GNUTLSError("error getting peer"
1360
" certificate")
2419
1361
if list_size.value == 0:
2420
1362
return None
2421
1363
cert = cert_list[0]
2422
1364
return ctypes.string_at(cert.data, cert.size)
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
1365
2458
1366
@staticmethod
2459
1367
def fingerprint(openpgp):
2460
1368
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2461
1369
# New GnuTLS "datum" with the OpenPGP public key
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)))
1370
datum = (gnutls.library.types
1371
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1372
ctypes.POINTER
1373
(ctypes.c_ubyte)),
1374
ctypes.c_uint(len(openpgp))))
2466
1375
# New empty GnuTLS certificate
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1376
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1377
(gnutls.library.functions
1378
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2469
1379
# Import the OpenPGP public key into the certificate
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1380
(gnutls.library.functions
1381
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
gnutls.library.constants
1383
.GNUTLS_OPENPGP_FMT_RAW))
2472
1384
# Verify the self signature in the key
2473
1385
crtverify = ctypes.c_uint()
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1386
(gnutls.library.functions
1387
.gnutls_openpgp_crt_verify_self(crt, 0,
1388
ctypes.byref(crtverify)))
2476
1389
if crtverify.value != 0:
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
2479
=crtverify.value)
1390
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1391
raise (gnutls.errors.CertificateSecurityError
1392
("Verify failed"))
2480
1393
# New buffer for the fingerprint
2481
1394
buf = ctypes.create_string_buffer(20)
2482
1395
buf_len = ctypes.c_size_t()
2483
1396
# Get the fingerprint from the certificate into the buffer
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1397
(gnutls.library.functions
1398
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
ctypes.byref(buf_len)))
2486
1400
# Deinit the certificate
2487
gnutls.openpgp_crt_deinit(crt)
1401
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2488
1402
# Convert the buffer to a Python bytestring
2489
1403
fpr = ctypes.string_at(buf, buf_len.value)
2490
1404
# Convert the bytestring to hexadecimal notation
2491
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2492
1406
return hex_fpr
2493
1407
2494
1408
2495
1409
class MultiprocessingMixIn(object):
2496
1410
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2497
2498
1411
def sub_process_main(self, request, address):
2499
1412
try:
2500
1413
self.finish_request(request, address)
2501
except Exception:
1414
except:
2502
1415
self.handle_error(request, address)
2503
1416
self.close_request(request)
2504
1417
2505
1418
def process_request(self, request, address):
2506
1419
"""Start a new process to process the request."""
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
2509
proc.start()
2510
return proc
2511
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
2512
1422
2513
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2514
1424
""" adds a pipe to the MixIn """
2515
2516
1425
def process_request(self, request, client_address):
2517
1426
"""Overrides and wraps the original process_request().
2518
1427
2519
1428
This function creates a new pipe in self.pipe
2520
1429
"""
2521
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2522
1431
2523
proc = MultiprocessingMixIn.process_request(self, request,
2524
client_address)
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
2525
1434
self.child_pipe.close()
2526
self.add_pipe(parent_pipe, proc)
1435
self.add_pipe(parent_pipe)
2527
1436
2528
def add_pipe(self, parent_pipe, proc):
1437
def add_pipe(self, parent_pipe):
2529
1438
"""Dummy function; override as necessary"""
2530
raise NotImplementedError()
2531
1439
raise NotImplementedError
2532
1440
2533
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2534
1442
socketserver.TCPServer, object):
2535
1443
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2536
1444
2537
1445
Attributes:
2538
1446
enabled: Boolean; whether this server is activated yet
2539
1447
interface: None or a network interface name (string)
2540
1448
use_ipv6: Boolean; to use IPv6 or not
2541
1449
"""
2542
2543
1450
def __init__(self, server_address, RequestHandlerClass,
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
"""
1451
interface=None, use_ipv6=True):
2550
1452
self.interface = interface
2551
1453
if use_ipv6:
2552
1454
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.
2580
1455
socketserver.TCPServer.__init__(self, server_address,
2581
1456
RequestHandlerClass)
2582
2583
1457
def server_bind(self):
2584
1458
"""This overrides the normal server_bind() function
2585
1459
to bind to an interface if one was specified, and also NOT to
2586
1460
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
2588
1461
if self.interface is not None:
2589
1462
if SO_BINDTODEVICE is None:
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
1463
logger.error("SO_BINDTODEVICE does not exist;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
try:
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1469
SO_BINDTODEVICE,
1470
str(self.interface
1471
+ '\0'))
1472
except socket.error as error:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
1478
logger.error("SO_BINDTODEVICE not available;"
1479
" cannot bind to interface %s",
1480
self.interface)
1481
else:
1482
raise
2611
1483
# Only bind(2) the socket if we really need to.
2612
1484
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
2615
1485
if not self.server_address[0]:
2616
1486
if self.address_family == socket.AF_INET6:
2617
any_address = "::" # in6addr_any
1487
any_address = "::" # in6addr_any
2618
1488
else:
2619
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2620
1490
self.server_address = (any_address,
2621
1491
self.server_address[1])
2622
1492
elif not self.server_address[1]:
2623
self.server_address = (self.server_address[0], 0)
1493
self.server_address = (self.server_address[0],
1494
0)
2624
1495
# if self.interface:
2625
1496
# self.server_address = (self.server_address[0],
2626
1497
# 0, # port
2632
1503
2633
1504
class MandosServer(IPv6_TCPServer):
2634
1505
"""Mandos server.
2635
1506
2636
1507
Attributes:
2637
1508
clients: set of Client objects
2638
1509
gnutls_priority GnuTLS priority string
2639
1510
use_dbus: Boolean; to emit D-Bus signals or not
2640
2641
Assumes a GLib.MainLoop event loop.
1511
1512
Assumes a gobject.MainLoop event loop.
2642
1513
"""
2643
2644
1514
def __init__(self, server_address, RequestHandlerClass,
2645
interface=None,
2646
use_ipv6=True,
2647
clients=None,
2648
gnutls_priority=None,
2649
use_dbus=True,
2650
socketfd=None):
1515
interface=None, use_ipv6=True, clients=None,
1516
gnutls_priority=None, use_dbus=True):
2651
1517
self.enabled = False
2652
1518
self.clients = clients
2653
1519
if self.clients is None:
2654
self.clients = {}
1520
self.clients = set()
2655
1521
self.use_dbus = use_dbus
2656
1522
self.gnutls_priority = gnutls_priority
2657
1523
IPv6_TCPServer.__init__(self, server_address,
2658
1524
RequestHandlerClass,
2659
interface=interface,
2660
use_ipv6=use_ipv6,
2661
socketfd=socketfd)
2662
1525
interface = interface,
1526
use_ipv6 = use_ipv6)
2663
1527
def server_activate(self):
2664
1528
if self.enabled:
2665
1529
return socketserver.TCPServer.server_activate(self)
2666
2667
1530
def enable(self):
2668
1531
self.enabled = True
2669
2670
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2671
1533
# Call "handle_ipc" for both data and EOF events
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,
1534
gobject.io_add_watch(parent_pipe.fileno(),
1535
gobject.IO_IN | gobject.IO_HUP,
1536
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
1538
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2682
1540
client_object=None):
2683
# error, or the other end of multiprocessing.Pipe has closed
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2685
# Wait for other process to exit
2686
proc.join()
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2687
1557
return False
2688
1558
2689
1559
# Read a request from the child
2690
1560
request = parent_pipe.recv()
2691
1561
command = request[0]
2692
1562
2693
1563
if command == 'init':
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:
1564
fpr = request[1]
1565
address = request[2]
1566
1567
for c in self.clients:
1568
if c.fingerprint == fpr:
2705
1569
client = c
2706
1570
break
2707
1571
else:
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
1572
logger.info("Client not found for fingerprint: %s, ad"
1573
"dress: %s", fpr, address)
2710
1574
if self.use_dbus:
2711
1575
# Emit D-Bus signal
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
2713
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2714
1577
parent_pipe.send(False)
2715
1578
return False
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))
1579
1580
gobject.io_add_watch(parent_pipe.fileno(),
1581
gobject.IO_IN | gobject.IO_HUP,
1582
functools.partial(self.handle_ipc,
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2724
1585
parent_pipe.send(True)
2725
# remove the old hook in favor of the new above hook on
2726
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2727
1587
return False
2728
1588
if command == 'funcall':
2729
1589
funcname = request[1]
2730
1590
args = request[2]
2731
1591
kwargs = request[3]
2732
2733
parent_pipe.send(('data', getattr(client_object,
2734
funcname)(*args,
2735
**kwargs)))
1592
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2736
1594
2737
1595
if command == 'getattr':
2738
1596
attrname = request[1]
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
1597
if callable(client_object.__getattribute__(attrname)):
1598
parent_pipe.send(('function',))
2742
1599
else:
2743
parent_pipe.send((
2744
'data', client_object.__getattribute__(attrname)))
2745
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1601
2746
1602
if command == 'setattr':
2747
1603
attrname = request[1]
2748
1604
value = request[2]
2751
1607
return True
2752
1608
2753
1609
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
2853
1610
def string_to_delta(interval):
2854
1611
"""Parse a string and return a datetime.timedelta
2855
1612
2856
1613
>>> string_to_delta('7d')
2857
1614
datetime.timedelta(7)
2858
1615
>>> string_to_delta('60s')
2866
1623
>>> string_to_delta('5m 30s')
2867
1624
datetime.timedelta(0, 330)
2868
1625
"""
2869
2870
try:
2871
return rfc3339_duration_to_delta(interval)
2872
except ValueError:
2873
pass
2874
2875
1626
timevalue = datetime.timedelta(0)
2876
1627
for s in interval.split():
2877
1628
try:
2878
suffix = s[-1]
1629
suffix = unicode(s[-1])
2879
1630
value = int(s[:-1])
2880
1631
if suffix == "d":
2881
1632
delta = datetime.timedelta(value)
2888
1639
elif suffix == "w":
2889
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2890
1641
else:
2891
raise ValueError("Unknown suffix {!r}".format(suffix))
2892
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2893
1644
raise ValueError(*(e.args))
2894
1645
timevalue += delta
2895
1646
return timevalue
2896
1647
2897
1648
2898
def daemon(nochdir=False, noclose=False):
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
1673
def daemon(nochdir = False, noclose = False):
2899
1674
"""See daemon(3). Standard BSD Unix function.
2900
1675
2901
1676
This should really exist as os.daemon, but it doesn't (yet)."""
2902
1677
if os.fork():
2903
1678
sys.exit()
2908
1683
sys.exit()
2909
1684
if not noclose:
2910
1685
# Close all standard open file descriptors
2911
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2912
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2913
1688
raise OSError(errno.ENODEV,
2914
"{} not a character device"
2915
.format(os.devnull))
1689
"%s not a character device"
1690
% os.path.devnull)
2916
1691
os.dup2(null, sys.stdin.fileno())
2917
1692
os.dup2(null, sys.stdout.fileno())
2918
1693
os.dup2(null, sys.stderr.fileno())
2921
1696
2922
1697
2923
1698
def main():
2924
1699
2925
1700
##################################################################
2926
1701
# Parsing of options, both command line and config file
2927
1702
2928
1703
parser = argparse.ArgumentParser()
2929
1704
parser.add_argument("-v", "--version", action="version",
2930
version="%(prog)s {}".format(version),
1705
version = "%%(prog)s %s" % version,
2931
1706
help="show version number and exit")
2932
1707
parser.add_argument("-i", "--interface", metavar="IF",
2933
1708
help="Bind to interface IF")
2939
1714
help="Run self-test")
2940
1715
parser.add_argument("--debug", action="store_true",
2941
1716
help="Debug mode; run in foreground and log"
2942
" to terminal", default=None)
1717
" to terminal")
2943
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2944
1719
help="Debug level for stdout output")
2945
1720
parser.add_argument("--priority", help="GnuTLS"
2952
1727
" files")
2953
1728
parser.add_argument("--no-dbus", action="store_false",
2954
1729
dest="use_dbus", help="Do not provide D-Bus"
2955
" system bus interface", default=None)
1730
" system bus interface")
2956
1731
parser.add_argument("--no-ipv6", action="store_false",
2957
dest="use_ipv6", help="Do not use IPv6",
2958
default=None)
2959
parser.add_argument("--no-restore", action="store_false",
2960
dest="restore", help="Do not restore stored"
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")
2965
parser.add_argument("--statedir", metavar="DIR",
2966
help="Directory to save/restore state in")
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
1732
dest="use_ipv6", help="Do not use IPv6")
2973
1733
options = parser.parse_args()
2974
1734
2975
1735
if options.check:
2976
1736
import doctest
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2979
1737
doctest.testmod()
1738
sys.exit()
1739
2980
1740
# Default values for config file for server-global settings
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
1741
server_defaults = { "interface": "",
1742
"address": "",
1743
"port": "",
1744
"debug": "False",
1745
"priority":
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1747
"servicename": "Mandos",
1748
"use_dbus": "True",
1749
"use_ipv6": "True",
1750
"debuglevel": "",
1751
}
1752
3004
1753
# Parse config file for server-global settings
3005
server_config = configparser.ConfigParser(server_defaults)
1754
server_config = configparser.SafeConfigParser(server_defaults)
3006
1755
del server_defaults
3007
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
1756
server_config.read(os.path.join(options.configdir,
1757
"mandos.conf"))
1758
# Convert the SafeConfigParser object to a dict
3009
1759
server_settings = server_config.defaults()
3010
1760
# Use the appropriate methods on the non-string config options
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
3013
1762
server_settings[option] = server_config.getboolean("DEFAULT",
3014
1763
option)
3015
1764
if server_settings["port"]:
3016
1765
server_settings["port"] = server_config.getint("DEFAULT",
3017
1766
"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"])
3027
1767
del server_config
3028
1768
3029
1769
# Override the settings from the config file with command line
3030
1770
# options, if set.
3031
1771
for option in ("interface", "address", "port", "debug",
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
1772
"priority", "servicename", "configdir",
1773
"use_dbus", "use_ipv6", "debuglevel"):
3035
1774
value = getattr(options, option)
3036
1775
if value is not None:
3037
1776
server_settings[option] = value
3038
1777
del options
3039
1778
# Force all strings to be unicode
3040
1779
for option in server_settings.keys():
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
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
3051
1782
# Now we have our good server settings in "server_settings"
3052
1783
3053
1784
##################################################################
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
1785
3060
1786
# For convenience
3061
1787
debug = server_settings["debug"]
3062
1788
debuglevel = server_settings["debuglevel"]
3063
1789
use_dbus = server_settings["use_dbus"]
3064
1790
use_ipv6 = server_settings["use_ipv6"]
3065
stored_state_path = os.path.join(server_settings["statedir"],
3066
stored_state_file)
3067
foreground = server_settings["foreground"]
3068
zeroconf = server_settings["zeroconf"]
3069
3070
if debug:
3071
initlogger(debug, logging.DEBUG)
3072
else:
3073
if not debuglevel:
3074
initlogger(debug)
3075
else:
3076
level = getattr(logging, debuglevel.upper())
3077
initlogger(debug, level)
3078
1791
3079
1792
if server_settings["servicename"] != "Mandos":
3080
syslogger.setFormatter(
3081
logging.Formatter('Mandos ({}) [%(process)d]:'
3082
' %(levelname)s: %(message)s'.format(
3083
server_settings["servicename"])))
3084
1793
syslogger.setFormatter(logging.Formatter
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
1797
3085
1798
# Parse config file with clients
3086
client_config = configparser.ConfigParser(Client.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
3087
1807
client_config.read(os.path.join(server_settings["configdir"],
3088
1808
"clients.conf"))
3089
1809
3090
1810
global mandos_dbus_service
3091
1811
mandos_dbus_service = None
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
3109
try:
3110
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3111
except IOError as e:
3112
logger.error("Could not open file %r", pidfilename,
3113
exc_info=e)
3114
3115
for name, group in (("_mandos", "_mandos"),
3116
("mandos", "mandos"),
3117
("nobody", "nogroup")):
3118
try:
3119
uid = pwd.getpwnam(name).pw_uid
3120
gid = pwd.getpwnam(group).pw_gid
3121
break
1812
1813
tcp_server = MandosServer((server_settings["address"],
1814
server_settings["port"]),
1815
ClientHandler,
1816
interface=(server_settings["interface"]
1817
or None),
1818
use_ipv6=use_ipv6,
1819
gnutls_priority=
1820
server_settings["priority"],
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
1824
try:
1825
pidfile = open(pidfilename, "w")
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
1828
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
1833
try:
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
3122
1836
except KeyError:
3123
continue
3124
else:
3125
uid = 65534
3126
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
3127
1843
try:
3128
1844
os.setgid(gid)
3129
1845
os.setuid(uid)
3130
if debug:
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3132
gid))
3133
1846
except OSError as error:
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
3137
raise
1847
if error[0] != errno.EPERM:
1848
raise error
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
3138
1857
3139
1858
if debug:
3140
1859
# Enable all possible GnuTLS debugging
3141
1860
3142
1861
# "Use a log level over 10 to enable all debugging options."
3143
1862
# - GnuTLS manual
3144
gnutls.global_set_log_level(11)
3145
3146
@gnutls.log_func
1863
gnutls.library.functions.gnutls_global_set_log_level(11)
1864
1865
@gnutls.library.types.gnutls_log_func
3147
1866
def debug_gnutls(level, string):
3148
1867
logger.debug("GnuTLS: %s", string[:-1])
3149
3150
gnutls.global_set_log_function(debug_gnutls)
3151
1868
1869
(gnutls.library.functions
1870
.gnutls_global_set_log_function(debug_gnutls))
1871
3152
1872
# Redirect stdin so all checkers get /dev/null
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3154
1874
os.dup2(null, sys.stdin.fileno())
3155
1875
if null > 2:
3156
1876
os.close(null)
3157
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
1880
3158
1881
# Need to fork before connecting to D-Bus
3159
if not foreground:
1882
if not debug:
3160
1883
# Close all input and output, do double fork, etc.
3161
1884
daemon()
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
1885
3168
1886
global main_loop
3169
1887
# From the Avahi example code
3170
DBusGMainLoop(set_as_default=True)
3171
main_loop = GLib.MainLoop()
1888
DBusGMainLoop(set_as_default=True )
1889
main_loop = gobject.MainLoop()
3172
1890
bus = dbus.SystemBus()
3173
1891
# End of Avahi example code
3174
1892
if use_dbus:
3175
1893
try:
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
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:
3183
logger.error("Disabling D-Bus:", exc_info=e)
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1895
bus, do_not_queue=True)
1896
except dbus.exceptions.NameExistsException as e:
1897
logger.error(unicode(e) + ", disabling D-Bus")
3184
1898
use_dbus = False
3185
1899
server_settings["use_dbus"] = False
3186
1900
tcp_server.use_dbus = False
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
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
1908
3198
1909
global multiprocessing_manager
3199
1910
multiprocessing_manager = multiprocessing.Manager()
3200
1911
3201
1912
client_class = Client
3202
1913
if use_dbus:
3203
client_class = functools.partial(ClientDBus, bus=bus)
3204
3205
client_settings = Client.config_parser(client_config)
3206
old_client_settings = {}
3207
clients_data = {}
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
3217
# Get client data and settings from last running state.
3218
if server_settings["restore"]:
3219
try:
3220
with open(stored_state_path, "rb") as 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"))
3270
os.remove(stored_state_path)
3271
except IOError as e:
3272
if e.errno == errno.ENOENT:
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
3275
else:
3276
logger.critical("Could not load persistent state:",
3277
exc_info=e)
3278
raise
3279
except EOFError as e:
3280
logger.warning("Could not load persistent state: "
3281
"EOFError:",
3282
exc_info=e)
3283
3284
with PGPEngine() as pgp:
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
3288
continue
3289
3290
# Decide which value to use after restoring saved state.
3291
# We have three different values: Old config file,
3292
# new config file, and saved state.
3293
# New config value takes precedence if it differs from old
3294
# config value, otherwise use saved state.
3295
for name, value in client_settings[client_name].items():
3296
try:
3297
# For each value in new config, check if it
3298
# differs from the old config value (Except for
3299
# the "secret" attribute)
3300
if (name != "secret"
3301
and (value !=
3302
old_client_settings[client_name][name])):
3303
client[name] = value
3304
except KeyError:
3305
pass
3306
3307
# Clients who has passed its expire date can still be
3308
# enabled if its last checker was successful. A Client
3309
# whose checker succeeded before we stored its state is
3310
# assumed to have successfully run all checkers during
3311
# downtime.
3312
if client["enabled"]:
3313
if datetime.datetime.utcnow() >= client["expires"]:
3314
if not client["last_checked_ok"]:
3315
logger.warning(
3316
"disabling client {} - Client never "
3317
"performed a successful checker".format(
3318
client_name))
3319
client["enabled"] = False
3320
elif client["last_checker_status"] != 0:
3321
logger.warning(
3322
"disabling client {} - Client last"
3323
" checker failed with error code"
3324
" {}".format(
3325
client_name,
3326
client["last_checker_status"]))
3327
client["enabled"] = False
3328
else:
3329
client["expires"] = (
3330
datetime.datetime.utcnow()
3331
+ client["timeout"])
3332
logger.debug("Last checker succeeded,"
3333
" keeping {} enabled".format(
3334
client_name))
1914
client_class = functools.partial(ClientDBus, bus = bus)
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
3335
1922
try:
3336
client["secret"] = pgp.decrypt(
3337
client["encrypted_secret"],
3338
client_settings[client_name]["secret"])
3339
except PGPError:
3340
# If decryption fails, we use secret from new settings
3341
logger.debug("Failed to decrypt {} old secret".format(
3342
client_name))
3343
client["secret"] = (client_settings[client_name]
3344
["secret"])
3345
3346
# Add/remove clients based on new changes made to config
3347
for client_name in (set(old_client_settings)
3348
- set(client_settings)):
3349
del clients_data[client_name]
3350
for client_name in (set(client_settings)
3351
- set(old_client_settings)):
3352
clients_data[client_name] = client_settings[client_name]
3353
3354
# Create all client objects
3355
for client_name, client in clients_data.items():
3356
tcp_server.clients[client_name] = client_class(
3357
name=client_name,
3358
settings=client,
3359
server_settings=server_settings)
3360
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
3361
1932
if not tcp_server.clients:
3362
1933
logger.warning("No clients defined")
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
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
3374
1947
del pidfilename
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
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1953
3380
1954
if use_dbus:
3381
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
1955
class MandosDBusService(dbus.service.Object):
3385
1956
"""A D-Bus proxy object"""
3386
3387
1957
def __init__(self):
3388
1958
dbus.service.Object.__init__(self, bus, "/")
3389
3390
_interface = "se.recompile.Mandos"
3391
1959
_interface = "se.bsnet.fukt.Mandos"
1960
3392
1961
@dbus.service.signal(_interface, signature="o")
3393
1962
def ClientAdded(self, objpath):
3394
1963
"D-Bus signal"
3395
1964
pass
3396
1965
3397
1966
@dbus.service.signal(_interface, signature="ss")
3398
def ClientNotFound(self, key_id, address):
1967
def ClientNotFound(self, fingerprint, address):
3399
1968
"D-Bus signal"
3400
1969
pass
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
1970
3404
1971
@dbus.service.signal(_interface, signature="os")
3405
1972
def ClientRemoved(self, objpath, name):
3406
1973
"D-Bus signal"
3407
1974
pass
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
1975
3411
1976
@dbus.service.method(_interface, out_signature="ao")
3412
1977
def GetAllClients(self):
3413
1978
"D-Bus method"
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"})
1979
return dbus.Array(c.dbus_object_path
1980
for c in tcp_server.clients)
1981
3419
1982
@dbus.service.method(_interface,
3420
1983
out_signature="a{oa{sv}}")
3421
1984
def GetAllClientsWithProperties(self):
3422
1985
"D-Bus method"
3423
1986
return dbus.Dictionary(
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
3427
1989
signature="oa{sv}")
3428
1990
3429
1991
@dbus.service.method(_interface, in_signature="o")
3430
1992
def RemoveClient(self, object_path):
3431
1993
"D-Bus method"
3432
for c in tcp_server.clients.values():
1994
for c in tcp_server.clients:
3433
1995
if c.dbus_object_path == object_path:
3434
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
3435
1997
c.remove_from_connection()
3436
# Don't signal the disabling
1998
# Don't signal anything except ClientRemoved
3437
1999
c.disable(quiet=True)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2000
# Emit D-Bus signal
2001
self.ClientRemoved(object_path, c.name)
3440
2002
return
3441
2003
raise KeyError(object_path)
3442
2004
3443
2005
del _interface
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
2006
3481
2007
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
2008
3488
2009
def cleanup():
3489
2010
"Cleanup function; run on exit"
3490
if zeroconf:
3491
service.cleanup()
3492
3493
mp.active_children()
3494
wn.close()
3495
if not (tcp_server.clients or client_settings):
3496
return
3497
3498
# Store client before exiting. Secrets are encrypted with key
3499
# based on what config file has. If config file is
3500
# removed/edited, old secret will thus be unrecovable.
3501
clients = {}
3502
with PGPEngine() as pgp:
3503
for client in tcp_server.clients.values():
3504
key = client_settings[client.name]["secret"]
3505
client.encrypted_secret = pgp.encrypt(client.secret,
3506
key)
3507
client_dict = {}
3508
3509
# A list of attributes that can not be pickled
3510
# + secret.
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
3514
.Object):
3515
exclude.add(name)
3516
3517
client_dict["encrypted_secret"] = (client
3518
.encrypted_secret)
3519
for attr in client.client_structure:
3520
if attr not in exclude:
3521
client_dict[attr] = getattr(client, attr)
3522
3523
clients[client.name] = client_dict
3524
del client_settings[client.name]["secret"]
3525
3526
try:
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
3536
os.rename(tempname, stored_state_path)
3537
except (IOError, OSError) as e:
3538
if not debug:
3539
try:
3540
os.remove(tempname)
3541
except NameError:
3542
pass
3543
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3544
logger.warning("Could not save persistent state: {}"
3545
.format(os.strerror(e.errno)))
3546
else:
3547
logger.warning("Could not save persistent state:",
3548
exc_info=e)
3549
raise
3550
3551
# Delete all clients, and settings from config
2011
service.cleanup()
2012
3552
2013
while tcp_server.clients:
3553
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
3554
2015
if use_dbus:
3555
2016
client.remove_from_connection()
3556
# Don't signal the disabling
2017
client.disable_hook = None
2018
# Don't signal anything except ClientRemoved
3557
2019
client.disable(quiet=True)
3558
# Emit D-Bus signal for removal
3559
2020
if use_dbus:
3560
mandos_dbus_service.client_removed_signal(client)
3561
client_settings.clear()
3562
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2023
client.name)
2024
3563
2025
atexit.register(cleanup)
3564
3565
for client in tcp_server.clients.values():
2026
2027
for client in tcp_server.clients:
3566
2028
if use_dbus:
3567
# Emit D-Bus signal for adding
3568
mandos_dbus_service.client_added_signal(client)
3569
# Need to initiate checking of clients
3570
if client.enabled:
3571
client.init_checker()
3572
2029
# Emit D-Bus signal
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2031
client.enable()
2032
3573
2033
tcp_server.enable()
3574
2034
tcp_server.server_activate()
3575
2035
3576
2036
# Find out what port we got
3577
if zeroconf:
3578
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
3579
2038
if use_ipv6:
3580
2039
logger.info("Now listening on address %r, port %d,"
3581
" flowinfo %d, scope_id %d",
3582
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
3583
2042
else: # IPv4
3584
logger.info("Now listening on address %r, port %d",
3585
*tcp_server.socket.getsockname())
3586
3587
# service.interface = tcp_server.socket.getsockname()[3]
3588
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2045
2046
#service.interface = tcp_server.socket.getsockname()[3]
2047
3589
2048
try:
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
2049
# From the Avahi example code
2050
try:
2051
service.activate()
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2054
cleanup()
2055
sys.exit(1)
2056
# End of Avahi example code
2057
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2059
lambda *args, **kwargs:
2060
(tcp_server.handle_request
2061
(*args[2:], **kwargs) or True))
2062
3605
2063
logger.debug("Starting main loop")
3606
2064
main_loop.run()
3607
2065
except AvahiError as error:
3608
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
3609
2067
cleanup()
3610
2068
sys.exit(1)
3611
2069
except KeyboardInterrupt:
3616
2074
# Must run before the D-Bus bus name gets deregistered
3617
2075
cleanup()
3618
2076
3619
3620
2077
if __name__ == '__main__':
3621
2078
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0