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- Committer: Björn Påhlsson
- Date: 2011-09-24 14:11:08 UTC
- mto: (237.7.50 mandos)
- mto: This revision was merged to the branch mainline in revision 286.
- Revision ID: belorn@fukt.bsnet.se-20110924141108-uejkiva9fqwt8il8
Refactoring code related to PropertyChanged dbus signal. Made sending
PropertyChanged signal to a python properties of interval variables.
PropertyChanged signal to a python properties of interval variables.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- 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
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.4"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class avahi(object):
279
"""This isn't so much a class as it is a module-like namespace."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
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)
302
102
303
103
class AvahiError(Exception):
304
104
def __init__(self, value, *args, **kwargs):
305
105
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
309
109
310
110
class AvahiServiceError(AvahiError):
311
111
pass
312
112
313
314
113
class AvahiGroupError(AvahiError):
315
114
pass
316
115
317
116
318
117
class AvahiService(object):
319
118
"""An Avahi (Zeroconf) service.
320
119
321
120
Attributes:
322
121
interface: integer; avahi.IF_UNSPEC or an interface index.
323
122
Used to optionally bind to the specified interface.
324
123
name: string; Example: 'Mandos'
325
124
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
126
port: integer; what port to announce
328
127
TXT: list of strings; TXT record for the service
329
128
domain: string; Domain to publish on, default to .local if empty.
335
134
server: D-Bus Server
336
135
bus: dbus.SystemBus()
337
136
"""
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
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):
350
141
self.interface = interface
351
142
self.name = name
352
143
self.type = servicetype
361
152
self.server = None
362
153
self.bus = bus
363
154
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
155
def rename(self):
366
156
"""Derived from the Avahi example code"""
367
157
if self.rename_count >= self.max_renames:
368
158
logger.critical("No suitable Zeroconf service name found"
369
159
" after %i retries, exiting.",
370
160
self.rename_count)
371
161
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
375
163
logger.info("Changing Zeroconf service name to %r ...",
376
164
self.name)
377
if remove:
378
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
379
170
try:
380
171
self.add()
381
172
except dbus.exceptions.DBusException as error:
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
391
177
def remove(self):
392
178
"""Derived from the Avahi example code"""
393
179
if self.entry_group_state_changed_match is not None:
395
181
self.entry_group_state_changed_match = None
396
182
if self.group is not None:
397
183
self.group.Reset()
398
399
184
def add(self):
400
185
"""Derived from the Avahi example code"""
401
186
self.remove()
406
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
192
self.entry_group_state_changed_match = (
408
193
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
410
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
196
self.name, self.type)
412
197
self.group.AddService(
418
203
dbus.UInt16(self.port),
419
204
avahi.string_array_to_txt_array(self.TXT))
420
205
self.group.Commit()
421
422
206
def entry_group_state_changed(self, state, error):
423
207
"""Derived from the Avahi example code"""
424
208
logger.debug("Avahi entry group state change: %i", state)
425
209
426
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
211
logger.debug("Zeroconf service established.")
428
212
elif state == avahi.ENTRY_GROUP_COLLISION:
430
214
self.rename()
431
215
elif state == avahi.ENTRY_GROUP_FAILURE:
432
216
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
436
220
def cleanup(self):
437
221
"""Derived from the Avahi example code"""
438
222
if self.group is not None:
439
223
try:
440
224
self.group.Free()
441
225
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
443
227
pass
444
228
self.group = None
445
229
self.remove()
446
447
230
def server_state_changed(self, state, error=None):
448
231
"""Derived from the Avahi example code"""
449
232
logger.debug("Avahi server state change: %i", state)
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
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" }
456
240
if state in bad_states:
457
241
if bad_states[state] is not None:
458
242
if error is None:
461
245
logger.error(bad_states[state] + ": %r", error)
462
246
self.cleanup()
463
247
elif state == avahi.SERVER_RUNNING:
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
248
self.add()
476
249
else:
477
250
if error is None:
478
251
logger.debug("Unknown state: %r", state)
479
252
else:
480
253
logger.debug("Unknown state: %r: %r", state, error)
481
482
254
def activate(self):
483
255
"""Derived from the Avahi example code"""
484
256
if self.server is None:
488
260
follow_name_owner_changes=True),
489
261
avahi.DBUS_INTERFACE_SERVER)
490
262
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
263
self.server_state_changed)
492
264
self.server_state_changed(self.server.GetState())
493
265
494
266
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
817
273
class Client(object):
818
274
"""A representation of a client host served by this server.
819
275
820
276
Attributes:
821
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
822
278
approval_delay: datetime.timedelta(); Time to wait for approval
823
279
approval_duration: datetime.timedelta(); Duration of one approval
824
280
checker: subprocess.Popen(); a running checker process used
825
281
to see if the client lives.
826
282
'None' if no process is running.
827
checker_callback_tag: a GLib event source tag, or None
283
checker_callback_tag: a gobject event source tag, or None
828
284
checker_command: string; External command which is run to check
829
285
if client lives. %() expansions are done at
830
286
runtime with vars(self) as dict, so that for
831
287
instance %(name)s can be used in the command.
832
checker_initiator_tag: a GLib event source tag, or None
288
checker_initiator_tag: a gobject event source tag, or None
833
289
created: datetime.datetime(); (UTC) object creation
834
client_structure: Object describing what attributes a client has
835
and is used for storing the client at exit
836
290
current_checker_command: string; current running checker_command
837
disable_initiator_tag: a GLib event source tag, or None
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
838
293
enabled: bool()
839
294
fingerprint: string (40 or 32 hexadecimal digits); used to
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
295
uniquely identify the client
843
296
host: string; available for use by the checker command
844
297
interval: datetime.timedelta(); How often to start a new checker
845
298
last_approval_request: datetime.datetime(); (UTC) or None
846
299
last_checked_ok: datetime.datetime(); (UTC) or None
847
last_checker_status: integer between 0 and 255 reflecting exit
848
status of last checker. -1 reflects crashed
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
852
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
853
301
name: string; from the config file, used in log messages and
854
302
D-Bus identifiers
855
303
secret: bytestring; sent verbatim (over TLS) to client
856
304
timeout: datetime.timedelta(); How long from last_checked_ok
857
305
until this client is disabled
858
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
859
307
runtime_expansions: Allowed attributes for runtime expansion.
860
308
expires: datetime.datetime(); time (UTC) when a client will be
861
309
disabled, or None
862
server_settings: The server_settings dict from main()
863
310
"""
864
311
865
312
runtime_expansions = ("approval_delay", "approval_duration",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
869
315
"last_enabled", "name", "timeout")
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
881
882
@staticmethod
883
def config_parser(config):
884
"""Construct a new dict of client settings of this form:
885
{ client_name: {setting_name: value, ...}, ...}
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
890
settings = {}
891
for client_name in config.sections():
892
section = dict(config.items(client_name))
893
client = settings[client_name] = {}
894
895
client["host"] = section["host"]
896
# Reformat values from string types to Python types
897
client["approved_by_default"] = config.getboolean(
898
client_name, "approved_by_default")
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
907
client["fingerprint"] = (section["fingerprint"].upper()
908
.replace(" ", ""))
909
if "secret" in section:
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
913
elif "secfile" in section:
914
with open(os.path.expanduser(os.path.expandvars
915
(section["secfile"])),
916
"rb") as secfile:
917
client["secret"] = secfile.read()
918
else:
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
921
client["timeout"] = string_to_delta(section["timeout"])
922
client["extended_timeout"] = string_to_delta(
923
section["extended_timeout"])
924
client["interval"] = string_to_delta(section["interval"])
925
client["approval_delay"] = string_to_delta(
926
section["approval_delay"])
927
client["approval_duration"] = string_to_delta(
928
section["approval_duration"])
929
client["checker_command"] = section["checker"]
930
client["last_approval_request"] = None
931
client["last_checked_ok"] = None
932
client["last_checker_status"] = -2
933
934
return settings
935
936
def __init__(self, settings, name=None, server_settings=None):
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
937
336
self.name = name
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
941
# adding all client settings
942
for setting, value in settings.items():
943
setattr(self, setting, value)
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
951
else:
952
self.last_enabled = None
953
self.expires = None
954
337
if config is None:
338
config = {}
955
339
logger.debug("Creating client %r", self.name)
956
logger.debug(" Key ID: %s", self.key_id)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
957
345
logger.debug(" Fingerprint: %s", self.fingerprint)
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
960
961
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
962
366
self.checker = None
963
367
self.checker_initiator_tag = None
964
368
self.disable_initiator_tag = None
369
self.expires = None
965
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
966
372
self.current_checker_command = None
967
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
968
377
self.approvals_pending = 0
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
973
if not attr.startswith("_")]
974
self.client_structure.append("client_structure")
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
978
if not name.startswith("_"):
979
self.client_structure.append(name)
980
981
# Send notice to process children that client state has changed
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
982
384
def send_changedstate(self):
983
with self.changedstate:
984
self.changedstate.notify_all()
985
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
986
389
def enable(self):
987
390
"""Start this client's checker and timeout hooks"""
988
391
if getattr(self, "enabled", False):
989
392
# Already enabled
990
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
991
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
992
405
self.enabled = True
993
406
self.last_enabled = datetime.datetime.utcnow()
994
self.init_checker()
995
self.send_changedstate()
996
407
# Also start a new checker *right now*.
408
self.start_checker()
409
997
410
def disable(self, quiet=True):
998
411
"""Disable this client."""
999
412
if not getattr(self, "enabled", False):
1000
413
return False
1001
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
1002
417
logger.info("Disabling client %s", self.name)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
1005
420
self.disable_initiator_tag = None
1006
421
self.expires = None
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
1009
424
self.checker_initiator_tag = None
1010
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
1011
428
self.enabled = False
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
429
# Do not run this again if called by a gobject.timeout_add
1015
430
return False
1016
431
1017
432
def __del__(self):
433
self.disable_hook = None
1018
434
self.disable()
1019
1020
def init_checker(self):
1021
# Schedule a new checker to be started an 'interval' from now,
1022
# and every interval from then on.
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
1028
# Schedule a disable() when 'timeout' has passed
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
1033
# Also start a new checker *right now*.
1034
self.start_checker()
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
435
436
def checker_callback(self, pid, condition, command):
1038
437
"""The checker has completed, so take appropriate actions."""
1039
438
self.checker_callback_tag = None
1040
439
self.checker = None
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
1048
if self.last_checker_status == 0:
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1049
443
logger.info("Checker for %(name)s succeeded",
1050
444
vars(self))
1051
445
self.checked_ok()
1052
446
else:
1053
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1054
449
else:
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
1057
450
logger.warning("Checker for %(name)s crashed?",
1058
451
vars(self))
1059
return False
1060
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
1063
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1070
459
if timeout is None:
1071
460
timeout = self.timeout
1072
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
1075
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
1078
self.expires = datetime.datetime.utcnow() + timeout
1079
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1080
468
def need_approval(self):
1081
469
self.last_approval_request = datetime.datetime.utcnow()
1082
470
1083
471
def start_checker(self):
1084
472
"""Start a new checker subprocess if one is not running.
1085
473
1086
474
If a checker already exists, leave it running and do
1087
475
nothing."""
1088
476
# The reason for not killing a running checker is that if we
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1093
481
# checkers alone, the checker would have to take more time
1094
482
# than 'timeout' for the client to be disabled, which is as it
1095
483
# should be.
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1101
498
# Start a new checker if needed
1102
499
if self.checker is None:
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
1107
500
try:
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1114
519
self.current_checker_command = command
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1141
544
return True
1142
545
1143
546
def stop_checker(self):
1144
547
"""Force the checker process, if any, to stop."""
1145
548
if self.checker_callback_tag:
1146
GLib.source_remove(self.checker_callback_tag)
549
gobject.source_remove(self.checker_callback_tag)
1147
550
self.checker_callback_tag = None
1148
551
if getattr(self, "checker", None) is None:
1149
552
return
1150
553
logger.debug("Stopping checker for %(name)s", vars(self))
1151
self.checker.terminate()
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1152
562
self.checker = None
1153
563
1154
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
1159
566
"""Decorators for marking methods of a DBusObjectWithProperties to
1160
567
become properties on the D-Bus.
1161
568
1162
569
The decorated method will be called with no arguments by "Get"
1163
570
and with one argument by "Set".
1164
571
1165
572
The parameters, where they are supported, are the same as
1166
573
dbus.service.method, except there is only "signature", since the
1167
574
type from Get() and the type sent to Set() is the same.
1170
577
# "Set" method, so we fail early here:
1171
578
if byte_arrays and signature != "ay":
1172
579
raise ValueError("Byte arrays not supported for non-'ay'"
1173
" signature {!r}".format(signature))
1174
580
" signature %r" % signature)
1175
581
def decorator(func):
1176
582
func._dbus_is_property = True
1177
583
func._dbus_interface = dbus_interface
1180
586
func._dbus_name = func.__name__
1181
587
if func._dbus_name.endswith("_dbus_property"):
1182
588
func._dbus_name = func._dbus_name[:-14]
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
590
return func
1229
591
return decorator
1230
592
1231
593
1232
594
class DBusPropertyException(dbus.exceptions.DBusException):
1233
595
"""A base class for D-Bus property-related exceptions
1234
596
"""
1235
pass
597
def __unicode__(self):
598
return unicode(str(self))
1236
599
1237
600
1238
601
class DBusPropertyAccessException(DBusPropertyException):
1247
610
pass
1248
611
1249
612
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
613
class DBusObjectWithProperties(dbus.service.Object):
1340
614
"""A D-Bus object with properties.
1341
615
1342
616
Classes inheriting from this can use the dbus_service_property
1343
617
decorator to expose methods as D-Bus properties. It exposes the
1344
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
1345
619
"""
1346
620
621
@staticmethod
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
624
625
def _get_all_dbus_properties(self):
626
"""Returns a generator of (name, attribute) pairs
627
"""
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
631
1347
632
def _get_dbus_property(self, interface_name, property_name):
1348
633
"""Returns a bound method if one exists which is a D-Bus
1349
634
property with the specified name and interface.
1350
635
"""
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
1354
if (value._dbus_name == property_name
1355
and value._dbus_interface == interface_name):
1356
return value.__get__(self)
1357
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
1358
646
# No such property
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
650
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1373
652
out_signature="v")
1374
653
def Get(self, interface_name, property_name):
1375
654
"""Standard D-Bus property Get() method, see D-Bus standard.
1381
660
if not hasattr(value, "variant_level"):
1382
661
return value
1383
662
return type(value)(value, variant_level=value.variant_level+1)
1384
663
1385
664
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1386
665
def Set(self, interface_name, property_name, value):
1387
666
"""Standard D-Bus property Set() method, see D-Bus standard.
1393
672
# The byte_arrays option is not supported yet on
1394
673
# signatures other than "ay".
1395
674
if prop._dbus_signature != "ay":
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
1401
678
prop(value)
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
679
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1405
681
out_signature="a{sv}")
1406
682
def GetAll(self, interface_name):
1407
683
"""Standard D-Bus property GetAll() method, see D-Bus
1409
685
1410
686
Note: Will not include properties with access="write".
1411
687
"""
1412
properties = {}
1413
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
1414
690
if (interface_name
1415
691
and interface_name != prop._dbus_interface):
1416
692
# Interface non-empty but did not match
1420
696
continue
1421
697
value = prop()
1422
698
if not hasattr(value, "variant_level"):
1423
properties[name] = value
699
all[name] = value
1424
700
continue
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
1427
return dbus.Dictionary(properties, signature="sv")
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
704
1437
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1438
706
out_signature="s",
1439
707
path_keyword='object_path',
1440
708
connection_keyword='connection')
1441
709
def Introspect(self, object_path, connection):
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
1445
711
"""
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
713
connection)
1449
714
try:
1450
715
document = xml.dom.minidom.parseString(xmlstring)
1451
1452
716
def make_tag(document, name, prop):
1453
717
e = document.createElement("property")
1454
718
e.setAttribute("name", name)
1455
719
e.setAttribute("type", prop._dbus_signature)
1456
720
e.setAttribute("access", prop._dbus_access)
1457
721
return e
1458
1459
722
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
1461
723
for tag in (make_tag(document, name, prop)
1462
724
for name, prop
1463
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
1464
726
if prop._dbus_interface
1465
727
== if_tag.getAttribute("name")):
1466
728
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
1483
729
# Add the names to the return values for the
1484
730
# "org.freedesktop.DBus.Properties" methods
1485
731
if (if_tag.getAttribute("name")
1500
746
except (AttributeError, xml.dom.DOMException,
1501
747
xml.parsers.expat.ExpatError) as error:
1502
748
logger.error("Failed to override Introspection method",
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
749
error)
750
return xmlstring
751
752
753
def datetime_to_dbus (dt, variant_level=0):
1579
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1580
755
if dt is None:
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
1607
"""
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
1617
# with the wrong interface name
1618
if (not hasattr(attribute, "_dbus_interface")
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
1621
continue
1622
# Create an alternate D-Bus interface name based on
1623
# the current name
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
1627
# Is this a D-Bus signal?
1628
if getattr(attribute, "_dbus_is_signal", False):
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
1633
zip(attribute.func_code.co_freevars,
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
# Create a new, but exactly alike, function
1642
# object, and decorate it to be a new D-Bus signal
1643
# with the alternate D-Bus interface name
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
1655
# Define a creator of a function to call both the
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
1659
def fixscope(func1, func2):
1660
"""This function is a scope container to pass
1661
func1 and func2 to the "call_both" function
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
1665
def call_both(*args, **kwargs):
1666
"""This function will emit two D-Bus
1667
signals by calling func1 and func2"""
1668
func1(*args, **kwargs)
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
1676
return call_both
1677
# Create the "call_both" function and add it to
1678
# the class
1679
attr[attrname] = fixscope(attribute, new_function)
1680
# Is this a D-Bus method?
1681
elif getattr(attribute, "_dbus_is_method", False):
1682
# Create a new, but exactly alike, function
1683
# object. Decorate it to be a new D-Bus method
1684
# with the alternate D-Bus interface name. Add it
1685
# to the class.
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
1698
# Is this a D-Bus property?
1699
elif getattr(attribute, "_dbus_is_property", False):
1700
# Create a new, but exactly alike, function
1701
# object, and decorate it to be a new D-Bus
1702
# property with the alternate D-Bus interface
1703
# name. Add it to the class.
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
756
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1756
760
class ClientDBus(Client, DBusObjectWithProperties):
1757
761
"""A Client class using D-Bus
1758
762
1759
763
Attributes:
1760
764
dbus_object_path: dbus.ObjectPath
1761
765
bus: dbus.SystemBus()
1762
766
"""
1763
767
1764
768
runtime_expansions = (Client.runtime_expansions
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
769
+ ("dbus_object_path",))
770
1769
771
# dbus.service.Object doesn't use super(), so we can't either.
1770
1771
def __init__(self, bus=None, *args, **kwargs):
772
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1772
775
self.bus = bus
1773
776
Client.__init__(self, *args, **kwargs)
1774
777
# Only now, when this client is initialized, can it show up on
1775
778
# the D-Bus
1776
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1777
780
{ord("."): ord("_"),
1778
781
ord("-"): ord("_")})
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1781
784
DBusObjectWithProperties.__init__(self, self.bus,
1782
785
self.dbus_object_path)
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
1789
""" Modify a variable so that it's a property which announces
1790
its changes to DBus.
1791
1792
transform_fun: Function that takes a value and a variant_level
1793
and transforms it to a D-Bus type.
1794
dbus_name: D-Bus name of the variable
786
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1795
795
type_func: Function that transform the value before sending it
1796
to the D-Bus. Default: no transform
1797
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1798
798
"""
1799
attrname = "_{}".format(dbus_name)
1800
799
real_value = [None,]
1801
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1802
803
if hasattr(self, "dbus_object_path"):
1803
if (not hasattr(self, attrname) or
1804
type_func(getattr(self, attrname, None))
1805
!= type_func(value)):
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
1821
setattr(self, attrname, value)
1822
1823
return property(lambda self: getattr(self, attrname), setter)
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
1824
812
1825
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1826
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1827
815
"ApprovalPending",
1828
type_func=bool)
816
type_func = bool)
1829
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1830
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1831
819
"LastEnabled")
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1835
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1836
823
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1839
last_approval_request = notifychangeproperty(
1840
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1841
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1842
827
"ApprovedByDefault")
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1846
approval_duration = notifychangeproperty(
1847
dbus.UInt64, "ApprovalDuration",
1848
type_func=lambda td: td.total_seconds() * 1000)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1849
832
host = notifychangeproperty(dbus.String, "Host")
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1853
extended_timeout = notifychangeproperty(
1854
dbus.UInt64, "ExtendedTimeout",
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1859
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
840
1863
841
del notifychangeproperty
1864
842
1865
843
def __del__(self, *args, **kwargs):
1866
844
try:
1867
845
self.remove_from_connection()
1870
848
if hasattr(DBusObjectWithProperties, "__del__"):
1871
849
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1872
850
Client.__del__(self, *args, **kwargs)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
851
852
def checker_callback(self, pid, condition, command,
853
*args, **kwargs):
854
self.checker_callback_tag = None
855
self.checker = None
856
if os.WIFEXITED(condition):
857
exitstatus = os.WEXITSTATUS(condition)
1881
858
# Emit D-Bus signal
1882
859
self.CheckerCompleted(dbus.Int16(exitstatus),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
860
dbus.Int64(condition),
1885
861
dbus.String(command))
1886
862
else:
1887
863
# Emit D-Bus signal
1888
864
self.CheckerCompleted(dbus.Int16(-1),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
865
dbus.Int64(condition),
1893
866
dbus.String(command))
1894
return ret
867
868
return Client.checker_callback(self, pid, condition, command,
869
*args, **kwargs)
1895
870
1896
871
def start_checker(self, *args, **kwargs):
1897
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1898
877
r = Client.start_checker(self, *args, **kwargs)
1899
878
# Only if new checker process was started
1900
879
if (self.checker is not None
1902
881
# Emit D-Bus signal
1903
882
self.CheckerStarted(self.current_checker_command)
1904
883
return r
1905
884
1906
885
def _reset_approved(self):
1907
self.approved = None
886
self._approved = None
1908
887
return False
1909
888
1910
889
def approve(self, value=True):
1911
self.approved = value
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1914
890
self.send_changedstate()
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
891
self._approved = value
892
gobject.timeout_add(_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
1922
902
# CheckerCompleted - signal
1923
903
@dbus.service.signal(_interface, signature="nxs")
1924
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1925
905
"D-Bus signal"
1926
906
pass
1927
907
1928
908
# CheckerStarted - signal
1929
909
@dbus.service.signal(_interface, signature="s")
1930
910
def CheckerStarted(self, command):
1931
911
"D-Bus signal"
1932
912
pass
1933
913
1934
914
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1936
915
@dbus.service.signal(_interface, signature="sv")
1937
916
def PropertyChanged(self, property, value):
1938
917
"D-Bus signal"
1939
918
pass
1940
919
1941
920
# GotSecret - signal
1942
921
@dbus.service.signal(_interface)
1943
922
def GotSecret(self):
1946
925
server to mandos-client
1947
926
"""
1948
927
pass
1949
928
1950
929
# Rejected - signal
1951
930
@dbus.service.signal(_interface, signature="s")
1952
931
def Rejected(self, reason):
1953
932
"D-Bus signal"
1954
933
pass
1955
934
1956
935
# NeedApproval - signal
1957
936
@dbus.service.signal(_interface, signature="tb")
1958
937
def NeedApproval(self, timeout, default):
1959
938
"D-Bus signal"
1960
939
return self.need_approval()
1961
1962
# Methods
1963
940
941
## Methods
942
1964
943
# Approve - method
1965
944
@dbus.service.method(_interface, in_signature="b")
1966
945
def Approve(self, value):
1967
946
self.approve(value)
1968
947
1969
948
# CheckedOK - method
1970
949
@dbus.service.method(_interface)
1971
950
def CheckedOK(self):
1972
951
self.checked_ok()
1973
952
1974
953
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1976
954
@dbus.service.method(_interface)
1977
955
def Enable(self):
1978
956
"D-Bus method"
1979
957
self.enable()
1980
958
1981
959
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1983
960
@dbus.service.method(_interface)
1984
961
def StartChecker(self):
1985
962
"D-Bus method"
1986
963
self.start_checker()
1987
964
1988
965
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1990
966
@dbus.service.method(_interface)
1991
967
def Disable(self):
1992
968
"D-Bus method"
1993
969
self.disable()
1994
970
1995
971
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
972
@dbus.service.method(_interface)
1998
973
def StopChecker(self):
1999
974
self.stop_checker()
2000
2001
# Properties
2002
975
976
## Properties
977
2003
978
# ApprovalPending - property
2004
979
@dbus_service_property(_interface, signature="b", access="read")
2005
980
def ApprovalPending_dbus_property(self):
2006
981
return dbus.Boolean(bool(self.approvals_pending))
2007
982
2008
983
# ApprovedByDefault - property
2009
@dbus_service_property(_interface,
2010
signature="b",
984
@dbus_service_property(_interface, signature="b",
2011
985
access="readwrite")
2012
986
def ApprovedByDefault_dbus_property(self, value=None):
2013
987
if value is None: # get
2014
988
return dbus.Boolean(self.approved_by_default)
2015
989
self.approved_by_default = bool(value)
2016
990
2017
991
# ApprovalDelay - property
2018
@dbus_service_property(_interface,
2019
signature="t",
992
@dbus_service_property(_interface, signature="t",
2020
993
access="readwrite")
2021
994
def ApprovalDelay_dbus_property(self, value=None):
2022
995
if value is None: # get
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
2025
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2026
998
2027
999
# ApprovalDuration - property
2028
@dbus_service_property(_interface,
2029
signature="t",
1000
@dbus_service_property(_interface, signature="t",
2030
1001
access="readwrite")
2031
1002
def ApprovalDuration_dbus_property(self, value=None):
2032
1003
if value is None: # get
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
2035
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2036
1007
2037
1008
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2040
1009
@dbus_service_property(_interface, signature="s", access="read")
2041
1010
def Name_dbus_property(self):
2042
1011
return dbus.String(self.name)
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
1012
2051
1013
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
1014
@dbus_service_property(_interface, signature="s", access="read")
2055
1015
def Fingerprint_dbus_property(self):
2056
1016
return dbus.String(self.fingerprint)
2057
1017
2058
1018
# Host - property
2059
@dbus_service_property(_interface,
2060
signature="s",
1019
@dbus_service_property(_interface, signature="s",
2061
1020
access="readwrite")
2062
1021
def Host_dbus_property(self, value=None):
2063
1022
if value is None: # get
2064
1023
return dbus.String(self.host)
2065
self.host = str(value)
2066
1024
self.host = value
1025
2067
1026
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
1027
@dbus_service_property(_interface, signature="s", access="read")
2071
1028
def Created_dbus_property(self):
2072
return datetime_to_dbus(self.created)
2073
1029
return dbus.String(datetime_to_dbus(self.created))
1030
2074
1031
# LastEnabled - property
2075
1032
@dbus_service_property(_interface, signature="s", access="read")
2076
1033
def LastEnabled_dbus_property(self):
2077
1034
return datetime_to_dbus(self.last_enabled)
2078
1035
2079
1036
# Enabled - property
2080
@dbus_service_property(_interface,
2081
signature="b",
1037
@dbus_service_property(_interface, signature="b",
2082
1038
access="readwrite")
2083
1039
def Enabled_dbus_property(self, value=None):
2084
1040
if value is None: # get
2087
1043
self.enable()
2088
1044
else:
2089
1045
self.disable()
2090
1046
2091
1047
# LastCheckedOK - property
2092
@dbus_service_property(_interface,
2093
signature="s",
1048
@dbus_service_property(_interface, signature="s",
2094
1049
access="readwrite")
2095
1050
def LastCheckedOK_dbus_property(self, value=None):
2096
1051
if value is not None:
2097
1052
self.checked_ok()
2098
1053
return
2099
1054
return datetime_to_dbus(self.last_checked_ok)
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
1055
2106
1056
# Expires - property
2107
1057
@dbus_service_property(_interface, signature="s", access="read")
2108
1058
def Expires_dbus_property(self):
2109
1059
return datetime_to_dbus(self.expires)
2110
1060
2111
1061
# LastApprovalRequest - property
2112
1062
@dbus_service_property(_interface, signature="s", access="read")
2113
1063
def LastApprovalRequest_dbus_property(self):
2114
1064
return datetime_to_dbus(self.last_approval_request)
2115
1065
2116
1066
# Timeout - property
2117
@dbus_service_property(_interface,
2118
signature="t",
1067
@dbus_service_property(_interface, signature="t",
2119
1068
access="readwrite")
2120
1069
def Timeout_dbus_property(self, value=None):
2121
1070
if value is None: # get
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
2124
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
2140
1093
2141
1094
# ExtendedTimeout - property
2142
@dbus_service_property(_interface,
2143
signature="t",
1095
@dbus_service_property(_interface, signature="t",
2144
1096
access="readwrite")
2145
1097
def ExtendedTimeout_dbus_property(self, value=None):
2146
1098
if value is None: # get
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2149
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2150
1101
2151
1102
# Interval - property
2152
@dbus_service_property(_interface,
2153
signature="t",
1103
@dbus_service_property(_interface, signature="t",
2154
1104
access="readwrite")
2155
1105
def Interval_dbus_property(self, value=None):
2156
1106
if value is None: # get
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2158
1108
self.interval = datetime.timedelta(0, 0, 0, value)
2159
1109
if getattr(self, "checker_initiator_tag", None) is None:
2160
1110
return
2161
if self.enabled:
2162
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
2167
1116
2168
1117
# Checker - property
2169
@dbus_service_property(_interface,
2170
signature="s",
1118
@dbus_service_property(_interface, signature="s",
2171
1119
access="readwrite")
2172
1120
def Checker_dbus_property(self, value=None):
2173
1121
if value is None: # get
2174
1122
return dbus.String(self.checker_command)
2175
self.checker_command = str(value)
2176
1123
self.checker_command = value
1124
2177
1125
# CheckerRunning - property
2178
@dbus_service_property(_interface,
2179
signature="b",
1126
@dbus_service_property(_interface, signature="b",
2180
1127
access="readwrite")
2181
1128
def CheckerRunning_dbus_property(self, value=None):
2182
1129
if value is None: # get
2185
1132
self.start_checker()
2186
1133
else:
2187
1134
self.stop_checker()
2188
1135
2189
1136
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
2193
1137
@dbus_service_property(_interface, signature="o", access="read")
2194
1138
def ObjectPath_dbus_property(self):
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1140
2197
1141
# Secret = property
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
2205
1144
def Secret_dbus_property(self, value):
2206
self.secret = bytes(value)
2207
1145
self.secret = str(value)
1146
2208
1147
del _interface
2209
1148
2210
1149
2211
1150
class ProxyClient(object):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1151
def __init__(self, child_pipe, fpr, address):
2213
1152
self._pipe = child_pipe
2214
self._pipe.send(('init', key_id, fpr, address))
1153
self._pipe.send(('init', fpr, address))
2215
1154
if not self._pipe.recv():
2216
raise KeyError(key_id or fpr)
1155
raise KeyError()
2217
1156
2218
1157
def __getattribute__(self, name):
2219
if name == '_pipe':
1158
if(name == '_pipe'):
2220
1159
return super(ProxyClient, self).__getattribute__(name)
2221
1160
self._pipe.send(('getattr', name))
2222
1161
data = self._pipe.recv()
2223
1162
if data[0] == 'data':
2224
1163
return data[1]
2225
1164
if data[0] == 'function':
2226
2227
1165
def func(*args, **kwargs):
2228
1166
self._pipe.send(('funcall', name, args, kwargs))
2229
1167
return self._pipe.recv()[1]
2230
2231
1168
return func
2232
1169
2233
1170
def __setattr__(self, name, value):
2234
if name == '_pipe':
1171
if(name == '_pipe'):
2235
1172
return super(ProxyClient, self).__setattr__(name, value)
2236
1173
self._pipe.send(('setattr', name, value))
2237
1174
2238
1175
2239
1176
class ClientHandler(socketserver.BaseRequestHandler, object):
2240
1177
"""A class to handle client connections.
2241
1178
2242
1179
Instantiated once for each connection to handle it.
2243
1180
Note: This will run in its own forked process."""
2244
1181
2245
1182
def handle(self):
2246
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
2247
1184
logger.info("TCP connection from: %s",
2248
str(self.client_address))
1185
unicode(self.client_address))
2249
1186
logger.debug("Pipe FD: %d",
2250
1187
self.server.child_pipe.fileno())
2251
1188
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1194
# Note: gnutls.connection.X509Credentials is really a
1195
# generic GnuTLS certificate credentials object so long as
1196
# no X.509 keys are added to it. Therefore, we can use it
1197
# here despite using OpenPGP certificates.
1198
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1200
# "+AES-256-CBC", "+SHA1",
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1202
# "+DHE-DSS"))
2258
1203
# Use a fallback default, since this MUST be set.
2259
1204
priority = self.server.gnutls_priority
2260
1205
if priority is None:
2261
1206
priority = "NORMAL"
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
2265
1210
2266
1211
# Start communication using the Mandos protocol
2267
1212
# Get protocol number
2269
1214
logger.debug("Protocol version: %r", line)
2270
1215
try:
2271
1216
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
1217
raise RuntimeError
2273
1218
except (ValueError, IndexError, RuntimeError) as error:
2274
1219
logger.error("Unknown protocol version: %s", error)
2275
1220
return
2277
1222
# Start GnuTLS connection
2278
1223
try:
2279
1224
session.handshake()
2280
except gnutls.Error as error:
1225
except gnutls.errors.GNUTLSError as error:
2281
1226
logger.warning("Handshake failed: %s", error)
2282
1227
# Do not run session.bye() here: the session is not
2283
1228
# established. Just abandon the request.
2286
1231
2287
1232
approval_required = False
2288
1233
try:
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
1234
try:
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1237
except (TypeError,
1238
gnutls.errors.GNUTLSError) as error:
1239
logger.warning("Bad certificate: %s", error)
1240
return
1241
logger.debug("Fingerprint: %s", fpr)
1242
1243
try:
1244
client = ProxyClient(child_pipe, fpr,
2311
1245
self.client_address)
2312
1246
except KeyError:
2313
1247
return
2314
1248
2315
1249
if client.approval_delay:
2316
1250
delay = client.approval_delay
2317
1251
client.approvals_pending += 1
2318
1252
approval_required = True
2319
1253
2320
1254
while True:
2321
1255
if not client.enabled:
2322
1256
logger.info("Client %s is disabled",
2323
client.name)
1257
client.name)
2324
1258
if self.server.use_dbus:
2325
1259
# Emit D-Bus signal
2326
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
2327
1261
return
2328
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1262
1263
if client._approved or not client.approval_delay:
1264
#We are approved or approval is disabled
2331
1265
break
2332
elif client.approved is None:
1266
elif client._approved is None:
2333
1267
logger.info("Client %s needs approval",
2334
1268
client.name)
2335
1269
if self.server.use_dbus:
2336
1270
# Emit D-Bus signal
2337
1271
client.NeedApproval(
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
2340
1274
else:
2341
1275
logger.warning("Client %s was not approved",
2342
1276
client.name)
2344
1278
# Emit D-Bus signal
2345
1279
client.Rejected("Denied")
2346
1280
return
2347
2348
# wait until timeout or approved
1281
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
2349
1284
time = datetime.datetime.now()
2350
1285
client.changedstate.acquire()
2351
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2352
1287
client.changedstate.release()
2353
1288
time2 = datetime.datetime.now()
2354
1289
if (time2 - time) >= delay:
2364
1299
break
2365
1300
else:
2366
1301
delay -= time2 - time
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
1302
1303
sent_size = 0
1304
while sent_size < len(client.secret):
1305
try:
1306
sent = session.send(client.secret[sent_size:])
1307
except gnutls.errors.GNUTLSError as error:
1308
logger.warning("gnutls send failed")
1309
return
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1313
sent_size += sent
2374
1314
2375
1315
logger.info("Sending secret to %s", client.name)
2376
# bump the timeout using extended_timeout
2377
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
2378
1318
if self.server.use_dbus:
2379
1319
# Emit D-Bus signal
2380
1320
client.GotSecret()
2381
1321
2382
1322
finally:
2383
1323
if approval_required:
2384
1324
client.approvals_pending -= 1
2385
1325
try:
2386
1326
session.bye()
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1327
except gnutls.errors.GNUTLSError as error:
1328
logger.warning("GnuTLS bye failed")
1329
2391
1330
@staticmethod
2392
1331
def peer_certificate(session):
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2401
else:
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
1332
"Return the peer's OpenPGP certificate as a bytestring"
1333
# If not an OpenPGP certificate...
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1337
# ...do the normal thing
1338
return session.peer_certificate
2409
1339
list_size = ctypes.c_uint(1)
2410
cert_list = (gnutls.certificate_get_peers
1340
cert_list = (gnutls.library.functions
1341
.gnutls_certificate_get_peers
2411
1342
(session._c_object, ctypes.byref(list_size)))
2412
1343
if not bool(cert_list) and list_size.value != 0:
2413
raise gnutls.Error("error getting peer certificate")
1344
raise gnutls.errors.GNUTLSError("error getting peer"
1345
" certificate")
2414
1346
if list_size.value == 0:
2415
1347
return None
2416
1348
cert = cert_list[0]
2417
1349
return ctypes.string_at(cert.data, cert.size)
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
1350
2453
1351
@staticmethod
2454
1352
def fingerprint(openpgp):
2455
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2456
1354
# New GnuTLS "datum" with the OpenPGP public key
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
2461
1360
# New empty GnuTLS certificate
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2464
1364
# Import the OpenPGP public key into the certificate
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2467
1369
# Verify the self signature in the key
2468
1370
crtverify = ctypes.c_uint()
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2471
1374
if crtverify.value != 0:
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
2475
1378
# New buffer for the fingerprint
2476
1379
buf = ctypes.create_string_buffer(20)
2477
1380
buf_len = ctypes.c_size_t()
2478
1381
# Get the fingerprint from the certificate into the buffer
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2481
1385
# Deinit the certificate
2482
gnutls.openpgp_crt_deinit(crt)
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2483
1387
# Convert the buffer to a Python bytestring
2484
1388
fpr = ctypes.string_at(buf, buf_len.value)
2485
1389
# Convert the bytestring to hexadecimal notation
2486
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2487
1391
return hex_fpr
2488
1392
2489
1393
2490
1394
class MultiprocessingMixIn(object):
2491
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
2493
1396
def sub_process_main(self, request, address):
2494
1397
try:
2495
1398
self.finish_request(request, address)
2496
except Exception:
1399
except:
2497
1400
self.handle_error(request, address)
2498
1401
self.close_request(request)
2499
1402
2500
1403
def process_request(self, request, address):
2501
1404
"""Start a new process to process the request."""
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
2504
proc.start()
2505
return proc
2506
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
2507
1407
2508
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2509
1409
""" adds a pipe to the MixIn """
2510
2511
1410
def process_request(self, request, client_address):
2512
1411
"""Overrides and wraps the original process_request().
2513
1412
2514
1413
This function creates a new pipe in self.pipe
2515
1414
"""
2516
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2517
1416
2518
proc = MultiprocessingMixIn.process_request(self, request,
2519
client_address)
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2520
1419
self.child_pipe.close()
2521
self.add_pipe(parent_pipe, proc)
1420
self.add_pipe(parent_pipe)
2522
1421
2523
def add_pipe(self, parent_pipe, proc):
1422
def add_pipe(self, parent_pipe):
2524
1423
"""Dummy function; override as necessary"""
2525
raise NotImplementedError()
2526
1424
raise NotImplementedError
2527
1425
2528
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2529
1427
socketserver.TCPServer, object):
2530
1428
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2531
1429
2532
1430
Attributes:
2533
1431
enabled: Boolean; whether this server is activated yet
2534
1432
interface: None or a network interface name (string)
2535
1433
use_ipv6: Boolean; to use IPv6 or not
2536
1434
"""
2537
2538
1435
def __init__(self, server_address, RequestHandlerClass,
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
1436
interface=None, use_ipv6=True):
2545
1437
self.interface = interface
2546
1438
if use_ipv6:
2547
1439
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
2575
1440
socketserver.TCPServer.__init__(self, server_address,
2576
1441
RequestHandlerClass)
2577
2578
1442
def server_bind(self):
2579
1443
"""This overrides the normal server_bind() function
2580
1444
to bind to an interface if one was specified, and also NOT to
2581
1445
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
2583
1446
if self.interface is not None:
2584
1447
if SO_BINDTODEVICE is None:
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2589
try:
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
2604
else:
2605
raise
1448
logger.error("SO_BINDTODEVICE does not exist;"
1449
" cannot bind to interface %s",
1450
self.interface)
1451
else:
1452
try:
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
1457
except socket.error as error:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
1463
logger.error("SO_BINDTODEVICE not available;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
raise
2606
1468
# Only bind(2) the socket if we really need to.
2607
1469
if self.server_address[0] or self.server_address[1]:
2608
if self.server_address[1]:
2609
self.allow_reuse_address = True
2610
1470
if not self.server_address[0]:
2611
1471
if self.address_family == socket.AF_INET6:
2612
any_address = "::" # in6addr_any
1472
any_address = "::" # in6addr_any
2613
1473
else:
2614
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2615
1475
self.server_address = (any_address,
2616
1476
self.server_address[1])
2617
1477
elif not self.server_address[1]:
2618
self.server_address = (self.server_address[0], 0)
1478
self.server_address = (self.server_address[0],
1479
0)
2619
1480
# if self.interface:
2620
1481
# self.server_address = (self.server_address[0],
2621
1482
# 0, # port
2627
1488
2628
1489
class MandosServer(IPv6_TCPServer):
2629
1490
"""Mandos server.
2630
1491
2631
1492
Attributes:
2632
1493
clients: set of Client objects
2633
1494
gnutls_priority GnuTLS priority string
2634
1495
use_dbus: Boolean; to emit D-Bus signals or not
2635
2636
Assumes a GLib.MainLoop event loop.
1496
1497
Assumes a gobject.MainLoop event loop.
2637
1498
"""
2638
2639
1499
def __init__(self, server_address, RequestHandlerClass,
2640
interface=None,
2641
use_ipv6=True,
2642
clients=None,
2643
gnutls_priority=None,
2644
use_dbus=True,
2645
socketfd=None):
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2646
1502
self.enabled = False
2647
1503
self.clients = clients
2648
1504
if self.clients is None:
2649
self.clients = {}
1505
self.clients = set()
2650
1506
self.use_dbus = use_dbus
2651
1507
self.gnutls_priority = gnutls_priority
2652
1508
IPv6_TCPServer.__init__(self, server_address,
2653
1509
RequestHandlerClass,
2654
interface=interface,
2655
use_ipv6=use_ipv6,
2656
socketfd=socketfd)
2657
1510
interface = interface,
1511
use_ipv6 = use_ipv6)
2658
1512
def server_activate(self):
2659
1513
if self.enabled:
2660
1514
return socketserver.TCPServer.server_activate(self)
2661
2662
1515
def enable(self):
2663
1516
self.enabled = True
2664
2665
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2666
1518
# Call "handle_ipc" for both data and EOF events
2667
GLib.io_add_watch(
2668
parent_pipe.fileno(),
2669
GLib.IO_IN | GLib.IO_HUP,
2670
functools.partial(self.handle_ipc,
2671
parent_pipe=parent_pipe,
2672
proc=proc))
2673
2674
def handle_ipc(self, source, condition,
2675
parent_pipe=None,
2676
proc=None,
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2677
1525
client_object=None):
2678
# error, or the other end of multiprocessing.Pipe has closed
2679
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2680
# Wait for other process to exit
2681
proc.join()
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2682
1542
return False
2683
1543
2684
1544
# Read a request from the child
2685
1545
request = parent_pipe.recv()
2686
1546
command = request[0]
2687
1547
2688
1548
if command == 'init':
2689
key_id = request[1].decode("ascii")
2690
fpr = request[2].decode("ascii")
2691
address = request[3]
2692
2693
for c in self.clients.values():
2694
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2695
continue
2696
if key_id and c.key_id == key_id:
2697
client = c
2698
break
2699
if fpr and c.fingerprint == fpr:
1549
fpr = request[1]
1550
address = request[2]
1551
1552
for c in self.clients:
1553
if c.fingerprint == fpr:
2700
1554
client = c
2701
1555
break
2702
1556
else:
2703
logger.info("Client not found for key ID: %s, address"
2704
": %s", key_id or fpr, address)
1557
logger.info("Client not found for fingerprint: %s, ad"
1558
"dress: %s", fpr, address)
2705
1559
if self.use_dbus:
2706
1560
# Emit D-Bus signal
2707
mandos_dbus_service.ClientNotFound(key_id or fpr,
2708
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2709
1562
parent_pipe.send(False)
2710
1563
return False
2711
2712
GLib.io_add_watch(
2713
parent_pipe.fileno(),
2714
GLib.IO_IN | GLib.IO_HUP,
2715
functools.partial(self.handle_ipc,
2716
parent_pipe=parent_pipe,
2717
proc=proc,
2718
client_object=client))
1564
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2719
1570
parent_pipe.send(True)
2720
# remove the old hook in favor of the new above hook on
2721
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2722
1572
return False
2723
1573
if command == 'funcall':
2724
1574
funcname = request[1]
2725
1575
args = request[2]
2726
1576
kwargs = request[3]
2727
2728
parent_pipe.send(('data', getattr(client_object,
2729
funcname)(*args,
2730
**kwargs)))
1577
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2731
1579
2732
1580
if command == 'getattr':
2733
1581
attrname = request[1]
2734
if isinstance(client_object.__getattribute__(attrname),
2735
collections.Callable):
2736
parent_pipe.send(('function', ))
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2737
1584
else:
2738
parent_pipe.send((
2739
'data', client_object.__getattribute__(attrname)))
2740
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1586
2741
1587
if command == 'setattr':
2742
1588
attrname = request[1]
2743
1589
value = request[2]
2746
1592
return True
2747
1593
2748
1594
2749
def rfc3339_duration_to_delta(duration):
2750
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2751
2752
>>> rfc3339_duration_to_delta("P7D")
2753
datetime.timedelta(7)
2754
>>> rfc3339_duration_to_delta("PT60S")
2755
datetime.timedelta(0, 60)
2756
>>> rfc3339_duration_to_delta("PT60M")
2757
datetime.timedelta(0, 3600)
2758
>>> rfc3339_duration_to_delta("PT24H")
2759
datetime.timedelta(1)
2760
>>> rfc3339_duration_to_delta("P1W")
2761
datetime.timedelta(7)
2762
>>> rfc3339_duration_to_delta("PT5M30S")
2763
datetime.timedelta(0, 330)
2764
>>> rfc3339_duration_to_delta("P1DT3M20S")
2765
datetime.timedelta(1, 200)
2766
"""
2767
2768
# Parsing an RFC 3339 duration with regular expressions is not
2769
# possible - there would have to be multiple places for the same
2770
# values, like seconds. The current code, while more esoteric, is
2771
# cleaner without depending on a parsing library. If Python had a
2772
# built-in library for parsing we would use it, but we'd like to
2773
# avoid excessive use of external libraries.
2774
2775
# New type for defining tokens, syntax, and semantics all-in-one
2776
Token = collections.namedtuple("Token", (
2777
"regexp", # To match token; if "value" is not None, must have
2778
# a "group" containing digits
2779
"value", # datetime.timedelta or None
2780
"followers")) # Tokens valid after this token
2781
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2782
# the "duration" ABNF definition in RFC 3339, Appendix A.
2783
token_end = Token(re.compile(r"$"), None, frozenset())
2784
token_second = Token(re.compile(r"(\d+)S"),
2785
datetime.timedelta(seconds=1),
2786
frozenset((token_end, )))
2787
token_minute = Token(re.compile(r"(\d+)M"),
2788
datetime.timedelta(minutes=1),
2789
frozenset((token_second, token_end)))
2790
token_hour = Token(re.compile(r"(\d+)H"),
2791
datetime.timedelta(hours=1),
2792
frozenset((token_minute, token_end)))
2793
token_time = Token(re.compile(r"T"),
2794
None,
2795
frozenset((token_hour, token_minute,
2796
token_second)))
2797
token_day = Token(re.compile(r"(\d+)D"),
2798
datetime.timedelta(days=1),
2799
frozenset((token_time, token_end)))
2800
token_month = Token(re.compile(r"(\d+)M"),
2801
datetime.timedelta(weeks=4),
2802
frozenset((token_day, token_end)))
2803
token_year = Token(re.compile(r"(\d+)Y"),
2804
datetime.timedelta(weeks=52),
2805
frozenset((token_month, token_end)))
2806
token_week = Token(re.compile(r"(\d+)W"),
2807
datetime.timedelta(weeks=1),
2808
frozenset((token_end, )))
2809
token_duration = Token(re.compile(r"P"), None,
2810
frozenset((token_year, token_month,
2811
token_day, token_time,
2812
token_week)))
2813
# Define starting values:
2814
# Value so far
2815
value = datetime.timedelta()
2816
found_token = None
2817
# Following valid tokens
2818
followers = frozenset((token_duration, ))
2819
# String left to parse
2820
s = duration
2821
# Loop until end token is found
2822
while found_token is not token_end:
2823
# Search for any currently valid tokens
2824
for token in followers:
2825
match = token.regexp.match(s)
2826
if match is not None:
2827
# Token found
2828
if token.value is not None:
2829
# Value found, parse digits
2830
factor = int(match.group(1), 10)
2831
# Add to value so far
2832
value += factor * token.value
2833
# Strip token from string
2834
s = token.regexp.sub("", s, 1)
2835
# Go to found token
2836
found_token = token
2837
# Set valid next tokens
2838
followers = found_token.followers
2839
break
2840
else:
2841
# No currently valid tokens were found
2842
raise ValueError("Invalid RFC 3339 duration: {!r}"
2843
.format(duration))
2844
# End token found
2845
return value
2846
2847
2848
1595
def string_to_delta(interval):
2849
1596
"""Parse a string and return a datetime.timedelta
2850
1597
2851
1598
>>> string_to_delta('7d')
2852
1599
datetime.timedelta(7)
2853
1600
>>> string_to_delta('60s')
2861
1608
>>> string_to_delta('5m 30s')
2862
1609
datetime.timedelta(0, 330)
2863
1610
"""
2864
2865
try:
2866
return rfc3339_duration_to_delta(interval)
2867
except ValueError:
2868
pass
2869
2870
1611
timevalue = datetime.timedelta(0)
2871
1612
for s in interval.split():
2872
1613
try:
2873
suffix = s[-1]
1614
suffix = unicode(s[-1])
2874
1615
value = int(s[:-1])
2875
1616
if suffix == "d":
2876
1617
delta = datetime.timedelta(value)
2883
1624
elif suffix == "w":
2884
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2885
1626
else:
2886
raise ValueError("Unknown suffix {!r}".format(suffix))
2887
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2888
1629
raise ValueError(*(e.args))
2889
1630
timevalue += delta
2890
1631
return timevalue
2891
1632
2892
1633
2893
def daemon(nochdir=False, noclose=False):
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
1658
def daemon(nochdir = False, noclose = False):
2894
1659
"""See daemon(3). Standard BSD Unix function.
2895
1660
2896
1661
This should really exist as os.daemon, but it doesn't (yet)."""
2897
1662
if os.fork():
2898
1663
sys.exit()
2903
1668
sys.exit()
2904
1669
if not noclose:
2905
1670
# Close all standard open file descriptors
2906
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2907
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2908
1673
raise OSError(errno.ENODEV,
2909
"{} not a character device"
2910
.format(os.devnull))
1674
"%s not a character device"
1675
% os.path.devnull)
2911
1676
os.dup2(null, sys.stdin.fileno())
2912
1677
os.dup2(null, sys.stdout.fileno())
2913
1678
os.dup2(null, sys.stderr.fileno())
2916
1681
2917
1682
2918
1683
def main():
2919
1684
2920
1685
##################################################################
2921
1686
# Parsing of options, both command line and config file
2922
1687
2923
1688
parser = argparse.ArgumentParser()
2924
1689
parser.add_argument("-v", "--version", action="version",
2925
version="%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2926
1691
help="show version number and exit")
2927
1692
parser.add_argument("-i", "--interface", metavar="IF",
2928
1693
help="Bind to interface IF")
2934
1699
help="Run self-test")
2935
1700
parser.add_argument("--debug", action="store_true",
2936
1701
help="Debug mode; run in foreground and log"
2937
" to terminal", default=None)
1702
" to terminal")
2938
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2939
1704
help="Debug level for stdout output")
2940
1705
parser.add_argument("--priority", help="GnuTLS"
2947
1712
" files")
2948
1713
parser.add_argument("--no-dbus", action="store_false",
2949
1714
dest="use_dbus", help="Do not provide D-Bus"
2950
" system bus interface", default=None)
1715
" system bus interface")
2951
1716
parser.add_argument("--no-ipv6", action="store_false",
2952
dest="use_ipv6", help="Do not use IPv6",
2953
default=None)
2954
parser.add_argument("--no-restore", action="store_false",
2955
dest="restore", help="Do not restore stored"
2956
" state", default=None)
2957
parser.add_argument("--socket", type=int,
2958
help="Specify a file descriptor to a network"
2959
" socket to use instead of creating one")
2960
parser.add_argument("--statedir", metavar="DIR",
2961
help="Directory to save/restore state in")
2962
parser.add_argument("--foreground", action="store_true",
2963
help="Run in foreground", default=None)
2964
parser.add_argument("--no-zeroconf", action="store_false",
2965
dest="zeroconf", help="Do not use Zeroconf",
2966
default=None)
2967
1717
dest="use_ipv6", help="Do not use IPv6")
2968
1718
options = parser.parse_args()
2969
1719
2970
1720
if options.check:
2971
1721
import doctest
2972
fail_count, test_count = doctest.testmod()
2973
sys.exit(os.EX_OK if fail_count == 0 else 1)
2974
1722
doctest.testmod()
1723
sys.exit()
1724
2975
1725
# Default values for config file for server-global settings
2976
if gnutls.has_rawpk:
2977
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2978
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2979
else:
2980
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2981
":+SIGN-DSA-SHA256")
2982
server_defaults = {"interface": "",
2983
"address": "",
2984
"port": "",
2985
"debug": "False",
2986
"priority": priority,
2987
"servicename": "Mandos",
2988
"use_dbus": "True",
2989
"use_ipv6": "True",
2990
"debuglevel": "",
2991
"restore": "True",
2992
"socket": "",
2993
"statedir": "/var/lib/mandos",
2994
"foreground": "False",
2995
"zeroconf": "True",
2996
}
2997
del priority
2998
1726
server_defaults = { "interface": "",
1727
"address": "",
1728
"port": "",
1729
"debug": "False",
1730
"priority":
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1732
"servicename": "Mandos",
1733
"use_dbus": "True",
1734
"use_ipv6": "True",
1735
"debuglevel": "",
1736
}
1737
2999
1738
# Parse config file for server-global settings
3000
1739
server_config = configparser.SafeConfigParser(server_defaults)
3001
1740
del server_defaults
3002
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
3003
1743
# Convert the SafeConfigParser object to a dict
3004
1744
server_settings = server_config.defaults()
3005
1745
# Use the appropriate methods on the non-string config options
3006
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3007
"foreground", "zeroconf"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
3008
1747
server_settings[option] = server_config.getboolean("DEFAULT",
3009
1748
option)
3010
1749
if server_settings["port"]:
3011
1750
server_settings["port"] = server_config.getint("DEFAULT",
3012
1751
"port")
3013
if server_settings["socket"]:
3014
server_settings["socket"] = server_config.getint("DEFAULT",
3015
"socket")
3016
# Later, stdin will, and stdout and stderr might, be dup'ed
3017
# over with an opened os.devnull. But we don't want this to
3018
# happen with a supplied network socket.
3019
if 0 <= server_settings["socket"] <= 2:
3020
server_settings["socket"] = os.dup(server_settings
3021
["socket"])
3022
1752
del server_config
3023
1753
3024
1754
# Override the settings from the config file with command line
3025
1755
# options, if set.
3026
1756
for option in ("interface", "address", "port", "debug",
3027
"priority", "servicename", "configdir", "use_dbus",
3028
"use_ipv6", "debuglevel", "restore", "statedir",
3029
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
3030
1759
value = getattr(options, option)
3031
1760
if value is not None:
3032
1761
server_settings[option] = value
3033
1762
del options
3034
1763
# Force all strings to be unicode
3035
1764
for option in server_settings.keys():
3036
if isinstance(server_settings[option], bytes):
3037
server_settings[option] = (server_settings[option]
3038
.decode("utf-8"))
3039
# Force all boolean options to be boolean
3040
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3041
"foreground", "zeroconf"):
3042
server_settings[option] = bool(server_settings[option])
3043
# Debug implies foreground
3044
if server_settings["debug"]:
3045
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
3046
1767
# Now we have our good server settings in "server_settings"
3047
1768
3048
1769
##################################################################
3049
3050
if (not server_settings["zeroconf"]
3051
and not (server_settings["port"]
3052
or server_settings["socket"] != "")):
3053
parser.error("Needs port or socket to work without Zeroconf")
3054
1770
3055
1771
# For convenience
3056
1772
debug = server_settings["debug"]
3057
1773
debuglevel = server_settings["debuglevel"]
3058
1774
use_dbus = server_settings["use_dbus"]
3059
1775
use_ipv6 = server_settings["use_ipv6"]
3060
stored_state_path = os.path.join(server_settings["statedir"],
3061
stored_state_file)
3062
foreground = server_settings["foreground"]
3063
zeroconf = server_settings["zeroconf"]
3064
3065
if debug:
3066
initlogger(debug, logging.DEBUG)
3067
else:
3068
if not debuglevel:
3069
initlogger(debug)
3070
else:
3071
level = getattr(logging, debuglevel.upper())
3072
initlogger(debug, level)
3073
1776
3074
1777
if server_settings["servicename"] != "Mandos":
3075
syslogger.setFormatter(
3076
logging.Formatter('Mandos ({}) [%(process)d]:'
3077
' %(levelname)s: %(message)s'.format(
3078
server_settings["servicename"])))
3079
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
1782
3080
1783
# Parse config file with clients
3081
client_config = configparser.SafeConfigParser(Client
3082
.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
3083
1793
client_config.read(os.path.join(server_settings["configdir"],
3084
1794
"clients.conf"))
3085
1795
3086
1796
global mandos_dbus_service
3087
1797
mandos_dbus_service = None
3088
3089
socketfd = None
3090
if server_settings["socket"] != "":
3091
socketfd = server_settings["socket"]
3092
tcp_server = MandosServer(
3093
(server_settings["address"], server_settings["port"]),
3094
ClientHandler,
3095
interface=(server_settings["interface"] or None),
3096
use_ipv6=use_ipv6,
3097
gnutls_priority=server_settings["priority"],
3098
use_dbus=use_dbus,
3099
socketfd=socketfd)
3100
if not foreground:
3101
pidfilename = "/run/mandos.pid"
3102
if not os.path.isdir("/run/."):
3103
pidfilename = "/var/run/mandos.pid"
3104
pidfile = None
3105
try:
3106
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3107
except IOError as e:
3108
logger.error("Could not open file %r", pidfilename,
3109
exc_info=e)
3110
3111
for name, group in (("_mandos", "_mandos"),
3112
("mandos", "mandos"),
3113
("nobody", "nogroup")):
3114
try:
3115
uid = pwd.getpwnam(name).pw_uid
3116
gid = pwd.getpwnam(group).pw_gid
3117
break
1798
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
1810
try:
1811
pidfile = open(pidfilename, "w")
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
1814
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
1819
try:
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
3118
1822
except KeyError:
3119
continue
3120
else:
3121
uid = 65534
3122
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
3123
1829
try:
3124
1830
os.setgid(gid)
3125
1831
os.setuid(uid)
3126
if debug:
3127
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3128
gid))
3129
1832
except OSError as error:
3130
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3131
.format(uid, gid, os.strerror(error.errno)))
3132
if error.errno != errno.EPERM:
3133
raise
1833
if error[0] != errno.EPERM:
1834
raise error
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
3134
1843
3135
1844
if debug:
3136
1845
# Enable all possible GnuTLS debugging
3137
1846
3138
1847
# "Use a log level over 10 to enable all debugging options."
3139
1848
# - GnuTLS manual
3140
gnutls.global_set_log_level(11)
3141
3142
@gnutls.log_func
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1850
1851
@gnutls.library.types.gnutls_log_func
3143
1852
def debug_gnutls(level, string):
3144
1853
logger.debug("GnuTLS: %s", string[:-1])
3145
3146
gnutls.global_set_log_function(debug_gnutls)
3147
1854
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
1857
3148
1858
# Redirect stdin so all checkers get /dev/null
3149
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3150
1860
os.dup2(null, sys.stdin.fileno())
3151
1861
if null > 2:
3152
1862
os.close(null)
3153
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
1866
3154
1867
# Need to fork before connecting to D-Bus
3155
if not foreground:
1868
if not debug:
3156
1869
# Close all input and output, do double fork, etc.
3157
1870
daemon()
3158
3159
# multiprocessing will use threads, so before we use GLib we need
3160
# to inform GLib that threads will be used.
3161
GLib.threads_init()
3162
1871
3163
1872
global main_loop
3164
1873
# From the Avahi example code
3165
DBusGMainLoop(set_as_default=True)
3166
main_loop = GLib.MainLoop()
1874
DBusGMainLoop(set_as_default=True )
1875
main_loop = gobject.MainLoop()
3167
1876
bus = dbus.SystemBus()
3168
1877
# End of Avahi example code
3169
1878
if use_dbus:
3170
1879
try:
3171
bus_name = dbus.service.BusName("se.recompile.Mandos",
3172
bus,
3173
do_not_queue=True)
3174
old_bus_name = dbus.service.BusName(
3175
"se.bsnet.fukt.Mandos", bus,
3176
do_not_queue=True)
3177
except dbus.exceptions.DBusException as e:
3178
logger.error("Disabling D-Bus:", exc_info=e)
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
3179
1884
use_dbus = False
3180
1885
server_settings["use_dbus"] = False
3181
1886
tcp_server.use_dbus = False
3182
if zeroconf:
3183
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3184
service = AvahiServiceToSyslog(
3185
name=server_settings["servicename"],
3186
servicetype="_mandos._tcp",
3187
protocol=protocol,
3188
bus=bus)
3189
if server_settings["interface"]:
3190
service.interface = if_nametoindex(
3191
server_settings["interface"].encode("utf-8"))
3192
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
1894
3193
1895
global multiprocessing_manager
3194
1896
multiprocessing_manager = multiprocessing.Manager()
3195
1897
3196
1898
client_class = Client
3197
1899
if use_dbus:
3198
client_class = functools.partial(ClientDBus, bus=bus)
3199
3200
client_settings = Client.config_parser(client_config)
3201
old_client_settings = {}
3202
clients_data = {}
3203
3204
# This is used to redirect stdout and stderr for checker processes
3205
global wnull
3206
wnull = open(os.devnull, "w") # A writable /dev/null
3207
# Only used if server is running in foreground but not in debug
3208
# mode
3209
if debug or not foreground:
3210
wnull.close()
3211
3212
# Get client data and settings from last running state.
3213
if server_settings["restore"]:
3214
try:
3215
with open(stored_state_path, "rb") as stored_state:
3216
if sys.version_info.major == 2:
3217
clients_data, old_client_settings = pickle.load(
3218
stored_state)
3219
else:
3220
bytes_clients_data, bytes_old_client_settings = (
3221
pickle.load(stored_state, encoding="bytes"))
3222
# Fix bytes to strings
3223
# clients_data
3224
# .keys()
3225
clients_data = {(key.decode("utf-8")
3226
if isinstance(key, bytes)
3227
else key): value
3228
for key, value in
3229
bytes_clients_data.items()}
3230
del bytes_clients_data
3231
for key in clients_data:
3232
value = {(k.decode("utf-8")
3233
if isinstance(k, bytes) else k): v
3234
for k, v in
3235
clients_data[key].items()}
3236
clients_data[key] = value
3237
# .client_structure
3238
value["client_structure"] = [
3239
(s.decode("utf-8")
3240
if isinstance(s, bytes)
3241
else s) for s in
3242
value["client_structure"]]
3243
# .name & .host
3244
for k in ("name", "host"):
3245
if isinstance(value[k], bytes):
3246
value[k] = value[k].decode("utf-8")
3247
if not value.has_key("key_id"):
3248
value["key_id"] = ""
3249
elif not value.has_key("fingerprint"):
3250
value["fingerprint"] = ""
3251
# old_client_settings
3252
# .keys()
3253
old_client_settings = {
3254
(key.decode("utf-8")
3255
if isinstance(key, bytes)
3256
else key): value
3257
for key, value in
3258
bytes_old_client_settings.items()}
3259
del bytes_old_client_settings
3260
# .host
3261
for value in old_client_settings.values():
3262
if isinstance(value["host"], bytes):
3263
value["host"] = (value["host"]
3264
.decode("utf-8"))
3265
os.remove(stored_state_path)
3266
except IOError as e:
3267
if e.errno == errno.ENOENT:
3268
logger.warning("Could not load persistent state:"
3269
" {}".format(os.strerror(e.errno)))
3270
else:
3271
logger.critical("Could not load persistent state:",
3272
exc_info=e)
3273
raise
3274
except EOFError as e:
3275
logger.warning("Could not load persistent state: "
3276
"EOFError:",
3277
exc_info=e)
3278
3279
with PGPEngine() as pgp:
3280
for client_name, client in clients_data.items():
3281
# Skip removed clients
3282
if client_name not in client_settings:
3283
continue
3284
3285
# Decide which value to use after restoring saved state.
3286
# We have three different values: Old config file,
3287
# new config file, and saved state.
3288
# New config value takes precedence if it differs from old
3289
# config value, otherwise use saved state.
3290
for name, value in client_settings[client_name].items():
3291
try:
3292
# For each value in new config, check if it
3293
# differs from the old config value (Except for
3294
# the "secret" attribute)
3295
if (name != "secret"
3296
and (value !=
3297
old_client_settings[client_name][name])):
3298
client[name] = value
3299
except KeyError:
3300
pass
3301
3302
# Clients who has passed its expire date can still be
3303
# enabled if its last checker was successful. A Client
3304
# whose checker succeeded before we stored its state is
3305
# assumed to have successfully run all checkers during
3306
# downtime.
3307
if client["enabled"]:
3308
if datetime.datetime.utcnow() >= client["expires"]:
3309
if not client["last_checked_ok"]:
3310
logger.warning(
3311
"disabling client {} - Client never "
3312
"performed a successful checker".format(
3313
client_name))
3314
client["enabled"] = False
3315
elif client["last_checker_status"] != 0:
3316
logger.warning(
3317
"disabling client {} - Client last"
3318
" checker failed with error code"
3319
" {}".format(
3320
client_name,
3321
client["last_checker_status"]))
3322
client["enabled"] = False
3323
else:
3324
client["expires"] = (
3325
datetime.datetime.utcnow()
3326
+ client["timeout"])
3327
logger.debug("Last checker succeeded,"
3328
" keeping {} enabled".format(
3329
client_name))
1900
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
3330
1908
try:
3331
client["secret"] = pgp.decrypt(
3332
client["encrypted_secret"],
3333
client_settings[client_name]["secret"])
3334
except PGPError:
3335
# If decryption fails, we use secret from new settings
3336
logger.debug("Failed to decrypt {} old secret".format(
3337
client_name))
3338
client["secret"] = (client_settings[client_name]
3339
["secret"])
3340
3341
# Add/remove clients based on new changes made to config
3342
for client_name in (set(old_client_settings)
3343
- set(client_settings)):
3344
del clients_data[client_name]
3345
for client_name in (set(client_settings)
3346
- set(old_client_settings)):
3347
clients_data[client_name] = client_settings[client_name]
3348
3349
# Create all client objects
3350
for client_name, client in clients_data.items():
3351
tcp_server.clients[client_name] = client_class(
3352
name=client_name,
3353
settings=client,
3354
server_settings=server_settings)
3355
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3356
1918
if not tcp_server.clients:
3357
1919
logger.warning("No clients defined")
3358
3359
if not foreground:
3360
if pidfile is not None:
3361
pid = os.getpid()
3362
try:
3363
with pidfile:
3364
print(pid, file=pidfile)
3365
except IOError:
3366
logger.error("Could not write to file %r with PID %d",
3367
pidfilename, pid)
3368
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
3369
1933
del pidfilename
3370
3371
for termsig in (signal.SIGHUP, signal.SIGTERM):
3372
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3373
lambda: main_loop.quit() and False)
3374
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1939
3375
1940
if use_dbus:
3376
3377
@alternate_dbus_interfaces(
3378
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3379
class MandosDBusService(DBusObjectWithObjectManager):
1941
class MandosDBusService(dbus.service.Object):
3380
1942
"""A D-Bus proxy object"""
3381
3382
1943
def __init__(self):
3383
1944
dbus.service.Object.__init__(self, bus, "/")
3384
3385
_interface = "se.recompile.Mandos"
3386
1945
_interface = "se.bsnet.fukt.Mandos"
1946
3387
1947
@dbus.service.signal(_interface, signature="o")
3388
1948
def ClientAdded(self, objpath):
3389
1949
"D-Bus signal"
3390
1950
pass
3391
1951
3392
1952
@dbus.service.signal(_interface, signature="ss")
3393
def ClientNotFound(self, key_id, address):
1953
def ClientNotFound(self, fingerprint, address):
3394
1954
"D-Bus signal"
3395
1955
pass
3396
3397
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3398
"true"})
1956
3399
1957
@dbus.service.signal(_interface, signature="os")
3400
1958
def ClientRemoved(self, objpath, name):
3401
1959
"D-Bus signal"
3402
1960
pass
3403
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3405
"true"})
1961
3406
1962
@dbus.service.method(_interface, out_signature="ao")
3407
1963
def GetAllClients(self):
3408
1964
"D-Bus method"
3409
return dbus.Array(c.dbus_object_path for c in
3410
tcp_server.clients.values())
3411
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
"true"})
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
1967
3414
1968
@dbus.service.method(_interface,
3415
1969
out_signature="a{oa{sv}}")
3416
1970
def GetAllClientsWithProperties(self):
3417
1971
"D-Bus method"
3418
1972
return dbus.Dictionary(
3419
{c.dbus_object_path: c.GetAll(
3420
"se.recompile.Mandos.Client")
3421
for c in tcp_server.clients.values()},
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3422
1975
signature="oa{sv}")
3423
1976
3424
1977
@dbus.service.method(_interface, in_signature="o")
3425
1978
def RemoveClient(self, object_path):
3426
1979
"D-Bus method"
3427
for c in tcp_server.clients.values():
1980
for c in tcp_server.clients:
3428
1981
if c.dbus_object_path == object_path:
3429
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
3430
1983
c.remove_from_connection()
3431
# Don't signal the disabling
1984
# Don't signal anything except ClientRemoved
3432
1985
c.disable(quiet=True)
3433
# Emit D-Bus signal for removal
3434
self.client_removed_signal(c)
1986
# Emit D-Bus signal
1987
self.ClientRemoved(object_path, c.name)
3435
1988
return
3436
1989
raise KeyError(object_path)
3437
1990
3438
1991
del _interface
3439
3440
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3441
out_signature="a{oa{sa{sv}}}")
3442
def GetManagedObjects(self):
3443
"""D-Bus method"""
3444
return dbus.Dictionary(
3445
{client.dbus_object_path:
3446
dbus.Dictionary(
3447
{interface: client.GetAll(interface)
3448
for interface in
3449
client._get_all_interface_names()})
3450
for client in tcp_server.clients.values()})
3451
3452
def client_added_signal(self, client):
3453
"""Send the new standard signal and the old signal"""
3454
if use_dbus:
3455
# New standard signal
3456
self.InterfacesAdded(
3457
client.dbus_object_path,
3458
dbus.Dictionary(
3459
{interface: client.GetAll(interface)
3460
for interface in
3461
client._get_all_interface_names()}))
3462
# Old signal
3463
self.ClientAdded(client.dbus_object_path)
3464
3465
def client_removed_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3467
if use_dbus:
3468
# New standard signal
3469
self.InterfacesRemoved(
3470
client.dbus_object_path,
3471
client._get_all_interface_names())
3472
# Old signal
3473
self.ClientRemoved(client.dbus_object_path,
3474
client.name)
3475
1992
3476
1993
mandos_dbus_service = MandosDBusService()
3477
3478
# Save modules to variables to exempt the modules from being
3479
# unloaded before the function registered with atexit() is run.
3480
mp = multiprocessing
3481
wn = wnull
3482
1994
3483
1995
def cleanup():
3484
1996
"Cleanup function; run on exit"
3485
if zeroconf:
3486
service.cleanup()
3487
3488
mp.active_children()
3489
wn.close()
3490
if not (tcp_server.clients or client_settings):
3491
return
3492
3493
# Store client before exiting. Secrets are encrypted with key
3494
# based on what config file has. If config file is
3495
# removed/edited, old secret will thus be unrecovable.
3496
clients = {}
3497
with PGPEngine() as pgp:
3498
for client in tcp_server.clients.values():
3499
key = client_settings[client.name]["secret"]
3500
client.encrypted_secret = pgp.encrypt(client.secret,
3501
key)
3502
client_dict = {}
3503
3504
# A list of attributes that can not be pickled
3505
# + secret.
3506
exclude = {"bus", "changedstate", "secret",
3507
"checker", "server_settings"}
3508
for name, typ in inspect.getmembers(dbus.service
3509
.Object):
3510
exclude.add(name)
3511
3512
client_dict["encrypted_secret"] = (client
3513
.encrypted_secret)
3514
for attr in client.client_structure:
3515
if attr not in exclude:
3516
client_dict[attr] = getattr(client, attr)
3517
3518
clients[client.name] = client_dict
3519
del client_settings[client.name]["secret"]
3520
3521
try:
3522
with tempfile.NamedTemporaryFile(
3523
mode='wb',
3524
suffix=".pickle",
3525
prefix='clients-',
3526
dir=os.path.dirname(stored_state_path),
3527
delete=False) as stored_state:
3528
pickle.dump((clients, client_settings), stored_state,
3529
protocol=2)
3530
tempname = stored_state.name
3531
os.rename(tempname, stored_state_path)
3532
except (IOError, OSError) as e:
3533
if not debug:
3534
try:
3535
os.remove(tempname)
3536
except NameError:
3537
pass
3538
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3539
logger.warning("Could not save persistent state: {}"
3540
.format(os.strerror(e.errno)))
3541
else:
3542
logger.warning("Could not save persistent state:",
3543
exc_info=e)
3544
raise
3545
3546
# Delete all clients, and settings from config
1997
service.cleanup()
1998
3547
1999
while tcp_server.clients:
3548
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
3549
2001
if use_dbus:
3550
2002
client.remove_from_connection()
3551
# Don't signal the disabling
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3552
2005
client.disable(quiet=True)
3553
# Emit D-Bus signal for removal
3554
2006
if use_dbus:
3555
mandos_dbus_service.client_removed_signal(client)
3556
client_settings.clear()
3557
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2010
3558
2011
atexit.register(cleanup)
3559
3560
for client in tcp_server.clients.values():
2012
2013
for client in tcp_server.clients:
3561
2014
if use_dbus:
3562
# Emit D-Bus signal for adding
3563
mandos_dbus_service.client_added_signal(client)
3564
# Need to initiate checking of clients
3565
if client.enabled:
3566
client.init_checker()
3567
2015
# Emit D-Bus signal
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2017
client.enable()
2018
3568
2019
tcp_server.enable()
3569
2020
tcp_server.server_activate()
3570
2021
3571
2022
# Find out what port we got
3572
if zeroconf:
3573
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
3574
2024
if use_ipv6:
3575
2025
logger.info("Now listening on address %r, port %d,"
3576
" flowinfo %d, scope_id %d",
3577
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3578
2028
else: # IPv4
3579
logger.info("Now listening on address %r, port %d",
3580
*tcp_server.socket.getsockname())
3581
3582
# service.interface = tcp_server.socket.getsockname()[3]
3583
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2031
2032
#service.interface = tcp_server.socket.getsockname()[3]
2033
3584
2034
try:
3585
if zeroconf:
3586
# From the Avahi example code
3587
try:
3588
service.activate()
3589
except dbus.exceptions.DBusException as error:
3590
logger.critical("D-Bus Exception", exc_info=error)
3591
cleanup()
3592
sys.exit(1)
3593
# End of Avahi example code
3594
3595
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3596
lambda *args, **kwargs:
3597
(tcp_server.handle_request
3598
(*args[2:], **kwargs) or True))
3599
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2043
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
lambda *args, **kwargs:
2046
(tcp_server.handle_request
2047
(*args[2:], **kwargs) or True))
2048
3600
2049
logger.debug("Starting main loop")
3601
2050
main_loop.run()
3602
2051
except AvahiError as error:
3603
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
3604
2053
cleanup()
3605
2054
sys.exit(1)
3606
2055
except KeyboardInterrupt:
3611
2060
# Must run before the D-Bus bus name gets deregistered
3612
2061
cleanup()
3613
2062
3614
3615
2063
if __name__ == '__main__':
3616
2064
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0