To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 1100
- compare with another revision
- download diff
- download tarball
- view history from revision 1100
- Committer: Teddy Hogeborn
- Date: 2019-04-09 20:37:18 UTC
- mfrom: (237.4.114 release)
- Revision ID: teddy@recompile.se-20190409203718-2h1z7km2g9kozxaw
Merge from release branch
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- 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 © 2008-2011 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
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
66
80
67
81
import dbus
68
82
import dbus.service
69
import gobject
70
import avahi
83
from gi.repository import GLib
71
84
from dbus.mainloop.glib import DBusGMainLoop
72
85
import ctypes
73
86
import ctypes.util
74
87
import xml.dom.minidom
75
88
import inspect
76
89
90
# Try to find the value of SO_BINDTODEVICE:
77
91
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:
78
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
95
except AttributeError:
80
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
81
99
from IN import SO_BINDTODEVICE
82
100
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
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
103
302
104
303
class AvahiError(Exception):
105
304
def __init__(self, value, *args, **kwargs):
106
305
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
110
309
111
310
class AvahiServiceError(AvahiError):
112
311
pass
113
312
313
114
314
class AvahiGroupError(AvahiError):
115
315
pass
116
316
117
317
118
318
class AvahiService(object):
119
319
"""An Avahi (Zeroconf) service.
120
320
121
321
Attributes:
122
322
interface: integer; avahi.IF_UNSPEC or an interface index.
123
323
Used to optionally bind to the specified interface.
124
324
name: string; Example: 'Mandos'
125
325
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
127
327
port: integer; what port to announce
128
328
TXT: list of strings; TXT record for the service
129
329
domain: string; Domain to publish on, default to .local if empty.
135
335
server: D-Bus Server
136
336
bus: dbus.SystemBus()
137
337
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
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):
142
350
self.interface = interface
143
351
self.name = name
144
352
self.type = servicetype
153
361
self.server = None
154
362
self.bus = bus
155
363
self.entry_group_state_changed_match = None
156
def rename(self):
364
365
def rename(self, remove=True):
157
366
"""Derived from the Avahi example code"""
158
367
if self.rename_count >= self.max_renames:
159
368
logger.critical("No suitable Zeroconf service name found"
160
369
" after %i retries, exiting.",
161
370
self.rename_count)
162
371
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
165
375
logger.info("Changing Zeroconf service name to %r ...",
166
376
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
377
if remove:
378
self.remove()
172
379
try:
173
380
self.add()
174
381
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
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
179
391
def remove(self):
180
392
"""Derived from the Avahi example code"""
181
393
if self.entry_group_state_changed_match is not None:
183
395
self.entry_group_state_changed_match = None
184
396
if self.group is not None:
185
397
self.group.Reset()
398
186
399
def add(self):
187
400
"""Derived from the Avahi example code"""
188
401
self.remove()
193
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
407
self.entry_group_state_changed_match = (
195
408
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
409
'StateChanged', self.entry_group_state_changed))
197
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
411
self.name, self.type)
199
412
self.group.AddService(
205
418
dbus.UInt16(self.port),
206
419
avahi.string_array_to_txt_array(self.TXT))
207
420
self.group.Commit()
421
208
422
def entry_group_state_changed(self, state, error):
209
423
"""Derived from the Avahi example code"""
210
424
logger.debug("Avahi entry group state change: %i", state)
211
425
212
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
427
logger.debug("Zeroconf service established.")
214
428
elif state == avahi.ENTRY_GROUP_COLLISION:
216
430
self.rename()
217
431
elif state == avahi.ENTRY_GROUP_FAILURE:
218
432
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
222
436
def cleanup(self):
223
437
"""Derived from the Avahi example code"""
224
438
if self.group is not None:
225
439
try:
226
440
self.group.Free()
227
441
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
442
dbus.exceptions.DBusException):
229
443
pass
230
444
self.group = None
231
445
self.remove()
446
232
447
def server_state_changed(self, state, error=None):
233
448
"""Derived from the Avahi example code"""
234
449
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
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
}
242
456
if state in bad_states:
243
457
if bad_states[state] is not None:
244
458
if error is None:
247
461
logger.error(bad_states[state] + ": %r", error)
248
462
self.cleanup()
249
463
elif state == avahi.SERVER_RUNNING:
250
self.add()
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)
251
476
else:
252
477
if error is None:
253
478
logger.debug("Unknown state: %r", state)
254
479
else:
255
480
logger.debug("Unknown state: %r: %r", state, error)
481
256
482
def activate(self):
257
483
"""Derived from the Avahi example code"""
258
484
if self.server is None:
262
488
follow_name_owner_changes=True),
263
489
avahi.DBUS_INTERFACE_SERVER)
264
490
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
491
self.server_state_changed)
266
492
self.server_state_changed(self.server.GetState())
267
493
268
494
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
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
275
817
class Client(object):
276
818
"""A representation of a client host served by this server.
277
819
278
820
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
821
approved: bool(); 'None' if not yet approved/disapproved
280
822
approval_delay: datetime.timedelta(); Time to wait for approval
281
823
approval_duration: datetime.timedelta(); Duration of one approval
282
824
checker: subprocess.Popen(); a running checker process used
283
825
to see if the client lives.
284
826
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
286
828
checker_command: string; External command which is run to check
287
829
if client lives. %() expansions are done at
288
830
runtime with vars(self) as dict, so that for
289
831
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
291
833
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
292
836
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
295
838
enabled: bool()
296
839
fingerprint: string (40 or 32 hexadecimal digits); used to
297
uniquely identify the client
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
298
843
host: string; available for use by the checker command
299
844
interval: datetime.timedelta(); How often to start a new checker
300
845
last_approval_request: datetime.datetime(); (UTC) or None
301
846
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
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
303
853
name: string; from the config file, used in log messages and
304
854
D-Bus identifiers
305
855
secret: bytestring; sent verbatim (over TLS) to client
306
856
timeout: datetime.timedelta(); How long from last_checked_ok
307
857
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
309
859
runtime_expansions: Allowed attributes for runtime expansion.
310
860
expires: datetime.datetime(); time (UTC) when a client will be
311
861
disabled, or None
862
server_settings: The server_settings dict from main()
312
863
"""
313
864
314
865
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
317
869
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
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):
338
937
self.name = name
339
if config is None:
340
config = {}
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
341
955
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
956
logger.debug(" Key ID: %s", self.key_id)
347
957
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
960
961
# attributes specific for this server instance
369
962
self.checker = None
370
963
self.checker_initiator_tag = None
371
964
self.disable_initiator_tag = None
372
self.expires = None
373
965
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
966
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
967
self.approved = None
380
968
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
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
389
982
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
983
with self.changedstate:
984
self.changedstate.notify_all()
985
394
986
def enable(self):
395
987
"""Start this client's checker and timeout hooks"""
396
988
if getattr(self, "enabled", False):
397
989
# Already enabled
398
990
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
991
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
992
self.enabled = True
411
993
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
994
self.init_checker()
995
self.send_changedstate()
996
415
997
def disable(self, quiet=True):
416
998
"""Disable this client."""
417
999
if not getattr(self, "enabled", False):
418
1000
return False
419
1001
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
1002
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
425
1005
self.disable_initiator_tag = None
426
1006
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
429
1009
self.checker_initiator_tag = None
430
1010
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
1011
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
435
1015
return False
436
1016
437
1017
def __del__(self):
438
self.disable_hook = None
439
1018
self.disable()
440
441
def checker_callback(self, pid, condition, command):
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):
442
1038
"""The checker has completed, so take appropriate actions."""
443
1039
self.checker_callback_tag = None
444
1040
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
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:
448
1049
logger.info("Checker for %(name)s succeeded",
449
1050
vars(self))
450
1051
self.checked_ok()
451
1052
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1053
logger.info("Checker for %(name)s failed", vars(self))
454
1054
else:
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
455
1057
logger.warning("Checker for %(name)s crashed?",
456
1058
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
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."""
464
1070
if timeout is None:
465
1071
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
1072
if self.disable_initiator_tag is not None:
468
gobject.source_remove(self.disable_initiator_tag)
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
469
1075
if getattr(self, "enabled", False):
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
473
1078
self.expires = datetime.datetime.utcnow() + timeout
474
1079
475
1080
def need_approval(self):
476
1081
self.last_approval_request = datetime.datetime.utcnow()
477
1082
478
1083
def start_checker(self):
479
1084
"""Start a new checker subprocess if one is not running.
480
1085
481
1086
If a checker already exists, leave it running and do
482
1087
nothing."""
483
1088
# The reason for not killing a running checker is that if we
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
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
488
1093
# checkers alone, the checker would have to take more time
489
1094
# than 'timeout' for the client to be disabled, which is as it
490
1095
# should be.
491
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
self.current_checker_command)
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
505
1101
# Start a new checker if needed
506
1102
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}
507
1107
try:
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
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
526
1114
self.current_checker_command = command
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
550
# Re-run this periodically if run by gobject.timeout_add
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
551
1141
return True
552
1142
553
1143
def stop_checker(self):
554
1144
"""Force the checker process, if any, to stop."""
555
1145
if self.checker_callback_tag:
556
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
557
1147
self.checker_callback_tag = None
558
1148
if getattr(self, "checker", None) is None:
559
1149
return
560
1150
logger.debug("Stopping checker for %(name)s", vars(self))
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
1151
self.checker.terminate()
569
1152
self.checker = None
570
1153
571
1154
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
574
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
575
1160
become properties on the D-Bus.
576
1161
577
1162
The decorated method will be called with no arguments by "Get"
578
1163
and with one argument by "Set".
579
1164
580
1165
The parameters, where they are supported, are the same as
581
1166
dbus.service.method, except there is only "signature", since the
582
1167
type from Get() and the type sent to Set() is the same.
585
1170
# "Set" method, so we fail early here:
586
1171
if byte_arrays and signature != "ay":
587
1172
raise ValueError("Byte arrays not supported for non-'ay'"
588
" signature %r" % signature)
1173
" signature {!r}".format(signature))
1174
589
1175
def decorator(func):
590
1176
func._dbus_is_property = True
591
1177
func._dbus_interface = dbus_interface
594
1180
func._dbus_name = func.__name__
595
1181
if func._dbus_name.endswith("_dbus_property"):
596
1182
func._dbus_name = func._dbus_name[:-14]
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
598
return func
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
599
1229
return decorator
600
1230
601
1231
602
1232
class DBusPropertyException(dbus.exceptions.DBusException):
603
1233
"""A base class for D-Bus property-related exceptions
604
1234
"""
605
def __unicode__(self):
606
return unicode(str(self))
1235
pass
607
1236
608
1237
609
1238
class DBusPropertyAccessException(DBusPropertyException):
618
1247
pass
619
1248
620
1249
621
class DBusObjectWithProperties(dbus.service.Object):
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):
622
1340
"""A D-Bus object with properties.
623
1341
624
1342
Classes inheriting from this can use the dbus_service_property
625
1343
decorator to expose methods as D-Bus properties. It exposes the
626
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
627
1345
"""
628
629
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
632
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
635
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
640
1346
641
1347
def _get_dbus_property(self, interface_name, property_name):
642
1348
"""Returns a bound method if one exists which is a D-Bus
643
1349
property with the specified name and interface.
644
1350
"""
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
648
1354
if (value._dbus_name == property_name
649
1355
and value._dbus_interface == interface_name):
650
1356
return value.__get__(self)
651
1357
652
1358
# No such property
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
656
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
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",
658
1373
out_signature="v")
659
1374
def Get(self, interface_name, property_name):
660
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
666
1381
if not hasattr(value, "variant_level"):
667
1382
return value
668
1383
return type(value)(value, variant_level=value.variant_level+1)
669
1384
670
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
671
1386
def Set(self, interface_name, property_name, value):
672
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
678
1393
# The byte_arrays option is not supported yet on
679
1394
# signatures other than "ay".
680
1395
if prop._dbus_signature != "ay":
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
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))
684
1401
prop(value)
685
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
687
1405
out_signature="a{sv}")
688
1406
def GetAll(self, interface_name):
689
1407
"""Standard D-Bus property GetAll() method, see D-Bus
690
1408
standard.
691
1409
692
1410
Note: Will not include properties with access="write".
693
1411
"""
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
1412
properties = {}
1413
for name, prop in self._get_all_dbus_things("property"):
696
1414
if (interface_name
697
1415
and interface_name != prop._dbus_interface):
698
1416
# Interface non-empty but did not match
702
1420
continue
703
1421
value = prop()
704
1422
if not hasattr(value, "variant_level"):
705
all[name] = value
1423
properties[name] = value
706
1424
continue
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
710
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
711
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
712
1438
out_signature="s",
713
1439
path_keyword='object_path',
714
1440
connection_keyword='connection')
715
1441
def Introspect(self, object_path, connection):
716
"""Standard D-Bus method, overloaded to insert property tags.
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
717
1445
"""
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
connection)
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
720
1449
try:
721
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
722
1452
def make_tag(document, name, prop):
723
1453
e = document.createElement("property")
724
1454
e.setAttribute("name", name)
725
1455
e.setAttribute("type", prop._dbus_signature)
726
1456
e.setAttribute("access", prop._dbus_access)
727
1457
return e
1458
728
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
729
1461
for tag in (make_tag(document, name, prop)
730
1462
for name, prop
731
in self._get_all_dbus_properties()
1463
in self._get_all_dbus_things("property")
732
1464
if prop._dbus_interface
733
1465
== if_tag.getAttribute("name")):
734
1466
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)
735
1483
# Add the names to the return values for the
736
1484
# "org.freedesktop.DBus.Properties" methods
737
1485
if (if_tag.getAttribute("name")
752
1500
except (AttributeError, xml.dom.DOMException,
753
1501
xml.parsers.expat.ExpatError) as error:
754
1502
logger.error("Failed to override Introspection method",
755
error)
756
return xmlstring
757
758
759
def datetime_to_dbus (dt, variant_level=0):
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):
760
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
761
1580
if dt is None:
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
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).
770
1607
"""
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
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):
778
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
779
1617
# with the wrong interface name
780
1618
if (not hasattr(attribute, "_dbus_interface")
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
783
1621
continue
784
1622
# Create an alternate D-Bus interface name based on
785
1623
# the current name
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
789
1627
# Is this a D-Bus signal?
790
1628
if getattr(attribute, "_dbus_is_signal", False):
791
# Extract the original non-method function by
792
# black magic
793
nonmethod_func = (dict(
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
794
1633
zip(attribute.func_code.co_freevars,
795
attribute.__closure__))["func"]
796
.cell_contents)
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)
797
1641
# Create a new, but exactly alike, function
798
1642
# object, and decorate it to be a new D-Bus signal
799
1643
# with the alternate D-Bus interface name
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
803
(types.FunctionType(
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
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
809
1655
# Define a creator of a function to call both the
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
812
1659
def fixscope(func1, func2):
813
1660
"""This function is a scope container to pass
814
1661
func1 and func2 to the "call_both" function
815
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
816
1665
def call_both(*args, **kwargs):
817
1666
"""This function will emit two D-Bus
818
1667
signals by calling func1 and func2"""
819
1668
func1(*args, **kwargs)
820
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
821
1676
return call_both
822
1677
# Create the "call_both" function and add it to
823
1678
# the class
824
attr[attrname] = fixscope(attribute,
825
new_function)
1679
attr[attrname] = fixscope(attribute, new_function)
826
1680
# Is this a D-Bus method?
827
1681
elif getattr(attribute, "_dbus_is_method", False):
828
1682
# Create a new, but exactly alike, function
829
1683
# object. Decorate it to be a new D-Bus method
830
1684
# with the alternate D-Bus interface name. Add it
831
1685
# to the class.
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
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
842
1698
# Is this a D-Bus property?
843
1699
elif getattr(attribute, "_dbus_is_property", False):
844
1700
# Create a new, but exactly alike, function
845
1701
# object, and decorate it to be a new D-Bus
846
1702
# property with the alternate D-Bus interface
847
1703
# name. Add it to the class.
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
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"})
863
1756
class ClientDBus(Client, DBusObjectWithProperties):
864
1757
"""A Client class using D-Bus
865
1758
866
1759
Attributes:
867
1760
dbus_object_path: dbus.ObjectPath
868
1761
bus: dbus.SystemBus()
869
1762
"""
870
1763
871
1764
runtime_expansions = (Client.runtime_expansions
872
+ ("dbus_object_path",))
873
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
874
1769
# dbus.service.Object doesn't use super(), so we can't either.
875
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1770
1771
def __init__(self, bus=None, *args, **kwargs):
878
1772
self.bus = bus
879
1773
Client.__init__(self, *args, **kwargs)
880
1774
# Only now, when this client is initialized, can it show up on
881
1775
# the D-Bus
882
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
883
1777
{ord("."): ord("_"),
884
1778
ord("-"): ord("_")})
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
887
1781
DBusObjectWithProperties.__init__(self, self.bus,
888
1782
self.dbus_object_path)
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
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):
893
1789
""" Modify a variable so that it's a property which announces
894
1790
its changes to DBus.
895
1791
900
1796
to the D-Bus. Default: no transform
901
1797
variant_level: D-Bus variant level. Default: 1
902
1798
"""
903
attrname = "_{0}".format(dbus_name)
1799
attrname = "_{}".format(dbus_name)
1800
904
1801
def setter(self, value):
905
1802
if hasattr(self, "dbus_object_path"):
906
1803
if (not hasattr(self, attrname) or
907
1804
type_func(getattr(self, attrname, None))
908
1805
!= type_func(value)):
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_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())
914
1821
setattr(self, attrname, value)
915
1822
916
1823
return property(lambda self: getattr(self, attrname), setter)
917
918
1824
919
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
920
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
921
1827
"ApprovalPending",
922
type_func = bool)
1828
type_func=bool)
923
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
924
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
925
1831
"LastEnabled")
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
929
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
930
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
931
1839
last_approval_request = notifychangeproperty(
932
1840
datetime_to_dbus, "LastApprovalRequest")
933
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
934
1842
"ApprovedByDefault")
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
939
1846
approval_duration = notifychangeproperty(
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1847
dbus.UInt64, "ApprovalDuration",
1848
type_func=lambda td: td.total_seconds() * 1000)
942
1849
host = notifychangeproperty(dbus.String, "Host")
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
946
1853
extended_timeout = notifychangeproperty(
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
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)
953
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
954
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
955
1863
del notifychangeproperty
956
1864
957
1865
def __del__(self, *args, **kwargs):
958
1866
try:
959
1867
self.remove_from_connection()
962
1870
if hasattr(DBusObjectWithProperties, "__del__"):
963
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
964
1872
Client.__del__(self, *args, **kwargs)
965
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
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:
972
1881
# Emit D-Bus signal
973
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
974
dbus.Int64(condition),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
975
1885
dbus.String(command))
976
1886
else:
977
1887
# Emit D-Bus signal
978
1888
self.CheckerCompleted(dbus.Int16(-1),
979
dbus.Int64(condition),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
980
1893
dbus.String(command))
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
984
1894
return ret
1895
985
1896
def start_checker(self, *args, **kwargs):
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1897
old_checker_pid = getattr(self.checker, "pid", None)
991
1898
r = Client.start_checker(self, *args, **kwargs)
992
1899
# Only if new checker process was started
993
1900
if (self.checker is not None
995
1902
# Emit D-Bus signal
996
1903
self.CheckerStarted(self.current_checker_command)
997
1904
return r
998
1905
999
1906
def _reset_approved(self):
1000
self._approved = None
1907
self.approved = None
1001
1908
return False
1002
1909
1003
1910
def approve(self, value=True):
1911
self.approved = value
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1004
1914
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1013
1014
## Signals
1015
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
1016
1922
# CheckerCompleted - signal
1017
1923
@dbus.service.signal(_interface, signature="nxs")
1018
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
1019
1925
"D-Bus signal"
1020
1926
pass
1021
1927
1022
1928
# CheckerStarted - signal
1023
1929
@dbus.service.signal(_interface, signature="s")
1024
1930
def CheckerStarted(self, command):
1025
1931
"D-Bus signal"
1026
1932
pass
1027
1933
1028
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1029
1936
@dbus.service.signal(_interface, signature="sv")
1030
1937
def PropertyChanged(self, property, value):
1031
1938
"D-Bus signal"
1032
1939
pass
1033
1940
1034
1941
# GotSecret - signal
1035
1942
@dbus.service.signal(_interface)
1036
1943
def GotSecret(self):
1039
1946
server to mandos-client
1040
1947
"""
1041
1948
pass
1042
1949
1043
1950
# Rejected - signal
1044
1951
@dbus.service.signal(_interface, signature="s")
1045
1952
def Rejected(self, reason):
1046
1953
"D-Bus signal"
1047
1954
pass
1048
1955
1049
1956
# NeedApproval - signal
1050
1957
@dbus.service.signal(_interface, signature="tb")
1051
1958
def NeedApproval(self, timeout, default):
1052
1959
"D-Bus signal"
1053
1960
return self.need_approval()
1054
1055
## Methods
1056
1961
1962
# Methods
1963
1057
1964
# Approve - method
1058
1965
@dbus.service.method(_interface, in_signature="b")
1059
1966
def Approve(self, value):
1060
1967
self.approve(value)
1061
1968
1062
1969
# CheckedOK - method
1063
1970
@dbus.service.method(_interface)
1064
1971
def CheckedOK(self):
1065
1972
self.checked_ok()
1066
1973
1067
1974
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1068
1976
@dbus.service.method(_interface)
1069
1977
def Enable(self):
1070
1978
"D-Bus method"
1071
1979
self.enable()
1072
1980
1073
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1074
1983
@dbus.service.method(_interface)
1075
1984
def StartChecker(self):
1076
1985
"D-Bus method"
1077
1986
self.start_checker()
1078
1987
1079
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1080
1990
@dbus.service.method(_interface)
1081
1991
def Disable(self):
1082
1992
"D-Bus method"
1083
1993
self.disable()
1084
1994
1085
1995
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1086
1997
@dbus.service.method(_interface)
1087
1998
def StopChecker(self):
1088
1999
self.stop_checker()
1089
1090
## Properties
1091
2000
2001
# Properties
2002
1092
2003
# ApprovalPending - property
1093
2004
@dbus_service_property(_interface, signature="b", access="read")
1094
2005
def ApprovalPending_dbus_property(self):
1095
2006
return dbus.Boolean(bool(self.approvals_pending))
1096
2007
1097
2008
# ApprovedByDefault - property
1098
@dbus_service_property(_interface, signature="b",
2009
@dbus_service_property(_interface,
2010
signature="b",
1099
2011
access="readwrite")
1100
2012
def ApprovedByDefault_dbus_property(self, value=None):
1101
2013
if value is None: # get
1102
2014
return dbus.Boolean(self.approved_by_default)
1103
2015
self.approved_by_default = bool(value)
1104
2016
1105
2017
# ApprovalDelay - property
1106
@dbus_service_property(_interface, signature="t",
2018
@dbus_service_property(_interface,
2019
signature="t",
1107
2020
access="readwrite")
1108
2021
def ApprovalDelay_dbus_property(self, value=None):
1109
2022
if value is None: # get
1110
return dbus.UInt64(self.approval_delay_milliseconds())
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
1111
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1112
2026
1113
2027
# ApprovalDuration - property
1114
@dbus_service_property(_interface, signature="t",
2028
@dbus_service_property(_interface,
2029
signature="t",
1115
2030
access="readwrite")
1116
2031
def ApprovalDuration_dbus_property(self, value=None):
1117
2032
if value is None: # get
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1120
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1121
2036
1122
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1123
2040
@dbus_service_property(_interface, signature="s", access="read")
1124
2041
def Name_dbus_property(self):
1125
2042
return dbus.String(self.name)
1126
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
1127
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1128
2054
@dbus_service_property(_interface, signature="s", access="read")
1129
2055
def Fingerprint_dbus_property(self):
1130
2056
return dbus.String(self.fingerprint)
1131
2057
1132
2058
# Host - property
1133
@dbus_service_property(_interface, signature="s",
2059
@dbus_service_property(_interface,
2060
signature="s",
1134
2061
access="readwrite")
1135
2062
def Host_dbus_property(self, value=None):
1136
2063
if value is None: # get
1137
2064
return dbus.String(self.host)
1138
self.host = value
1139
2065
self.host = str(value)
2066
1140
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1141
2070
@dbus_service_property(_interface, signature="s", access="read")
1142
2071
def Created_dbus_property(self):
1143
return dbus.String(datetime_to_dbus(self.created))
1144
2072
return datetime_to_dbus(self.created)
2073
1145
2074
# LastEnabled - property
1146
2075
@dbus_service_property(_interface, signature="s", access="read")
1147
2076
def LastEnabled_dbus_property(self):
1148
2077
return datetime_to_dbus(self.last_enabled)
1149
2078
1150
2079
# Enabled - property
1151
@dbus_service_property(_interface, signature="b",
2080
@dbus_service_property(_interface,
2081
signature="b",
1152
2082
access="readwrite")
1153
2083
def Enabled_dbus_property(self, value=None):
1154
2084
if value is None: # get
1157
2087
self.enable()
1158
2088
else:
1159
2089
self.disable()
1160
2090
1161
2091
# LastCheckedOK - property
1162
@dbus_service_property(_interface, signature="s",
2092
@dbus_service_property(_interface,
2093
signature="s",
1163
2094
access="readwrite")
1164
2095
def LastCheckedOK_dbus_property(self, value=None):
1165
2096
if value is not None:
1166
2097
self.checked_ok()
1167
2098
return
1168
2099
return datetime_to_dbus(self.last_checked_ok)
1169
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
1170
2106
# Expires - property
1171
2107
@dbus_service_property(_interface, signature="s", access="read")
1172
2108
def Expires_dbus_property(self):
1173
2109
return datetime_to_dbus(self.expires)
1174
2110
1175
2111
# LastApprovalRequest - property
1176
2112
@dbus_service_property(_interface, signature="s", access="read")
1177
2113
def LastApprovalRequest_dbus_property(self):
1178
2114
return datetime_to_dbus(self.last_approval_request)
1179
2115
1180
2116
# Timeout - property
1181
@dbus_service_property(_interface, signature="t",
2117
@dbus_service_property(_interface,
2118
signature="t",
1182
2119
access="readwrite")
1183
2120
def Timeout_dbus_property(self, value=None):
1184
2121
if value is None: # get
1185
return dbus.UInt64(self.timeout_milliseconds())
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1186
2124
self.timeout = datetime.timedelta(0, 0, 0, value)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1207
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)
2140
1208
2141
# ExtendedTimeout - property
1209
@dbus_service_property(_interface, signature="t",
2142
@dbus_service_property(_interface,
2143
signature="t",
1210
2144
access="readwrite")
1211
2145
def ExtendedTimeout_dbus_property(self, value=None):
1212
2146
if value is None: # get
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1214
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1215
2150
1216
2151
# Interval - property
1217
@dbus_service_property(_interface, signature="t",
2152
@dbus_service_property(_interface,
2153
signature="t",
1218
2154
access="readwrite")
1219
2155
def Interval_dbus_property(self, value=None):
1220
2156
if value is None: # get
1221
return dbus.UInt64(self.interval_milliseconds())
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1222
2158
self.interval = datetime.timedelta(0, 0, 0, value)
1223
2159
if getattr(self, "checker_initiator_tag", None) is None:
1224
2160
return
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1230
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
2167
1231
2168
# Checker - property
1232
@dbus_service_property(_interface, signature="s",
2169
@dbus_service_property(_interface,
2170
signature="s",
1233
2171
access="readwrite")
1234
2172
def Checker_dbus_property(self, value=None):
1235
2173
if value is None: # get
1236
2174
return dbus.String(self.checker_command)
1237
self.checker_command = value
1238
2175
self.checker_command = str(value)
2176
1239
2177
# CheckerRunning - property
1240
@dbus_service_property(_interface, signature="b",
2178
@dbus_service_property(_interface,
2179
signature="b",
1241
2180
access="readwrite")
1242
2181
def CheckerRunning_dbus_property(self, value=None):
1243
2182
if value is None: # get
1246
2185
self.start_checker()
1247
2186
else:
1248
2187
self.stop_checker()
1249
2188
1250
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1251
2193
@dbus_service_property(_interface, signature="o", access="read")
1252
2194
def ObjectPath_dbus_property(self):
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1254
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1255
2197
# Secret = property
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
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)
1258
2205
def Secret_dbus_property(self, value):
1259
self.secret = str(value)
1260
2206
self.secret = bytes(value)
2207
1261
2208
del _interface
1262
2209
1263
2210
1264
2211
class ProxyClient(object):
1265
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1266
2213
self._pipe = child_pipe
1267
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1268
2215
if not self._pipe.recv():
1269
raise KeyError()
1270
2216
raise KeyError(key_id or fpr)
2217
1271
2218
def __getattribute__(self, name):
1272
if(name == '_pipe'):
2219
if name == '_pipe':
1273
2220
return super(ProxyClient, self).__getattribute__(name)
1274
2221
self._pipe.send(('getattr', name))
1275
2222
data = self._pipe.recv()
1276
2223
if data[0] == 'data':
1277
2224
return data[1]
1278
2225
if data[0] == 'function':
2226
1279
2227
def func(*args, **kwargs):
1280
2228
self._pipe.send(('funcall', name, args, kwargs))
1281
2229
return self._pipe.recv()[1]
2230
1282
2231
return func
1283
2232
1284
2233
def __setattr__(self, name, value):
1285
if(name == '_pipe'):
2234
if name == '_pipe':
1286
2235
return super(ProxyClient, self).__setattr__(name, value)
1287
2236
self._pipe.send(('setattr', name, value))
1288
2237
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1291
2238
1292
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1293
2240
"""A class to handle client connections.
1294
2241
1295
2242
Instantiated once for each connection to handle it.
1296
2243
Note: This will run in its own forked process."""
1297
2244
1298
2245
def handle(self):
1299
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1300
2247
logger.info("TCP connection from: %s",
1301
unicode(self.client_address))
2248
str(self.client_address))
1302
2249
logger.debug("Pipe FD: %d",
1303
2250
self.server.child_pipe.fileno())
1304
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1309
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1314
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1318
# "+DHE-DSS"))
2251
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"))
1319
2258
# Use a fallback default, since this MUST be set.
1320
2259
priority = self.server.gnutls_priority
1321
2260
if priority is None:
1322
2261
priority = "NORMAL"
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1326
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
1327
2266
# Start communication using the Mandos protocol
1328
2267
# Get protocol number
1329
2268
line = self.request.makefile().readline()
1330
2269
logger.debug("Protocol version: %r", line)
1331
2270
try:
1332
2271
if int(line.strip().split()[0]) > 1:
1333
raise RuntimeError
2272
raise RuntimeError(line)
1334
2273
except (ValueError, IndexError, RuntimeError) as error:
1335
2274
logger.error("Unknown protocol version: %s", error)
1336
2275
return
1337
2276
1338
2277
# Start GnuTLS connection
1339
2278
try:
1340
2279
session.handshake()
1341
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1342
2281
logger.warning("Handshake failed: %s", error)
1343
2282
# Do not run session.bye() here: the session is not
1344
2283
# established. Just abandon the request.
1345
2284
return
1346
2285
logger.debug("Handshake succeeded")
1347
2286
1348
2287
approval_required = False
1349
2288
try:
1350
try:
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1353
except (TypeError,
1354
gnutls.errors.GNUTLSError) as error:
1355
logger.warning("Bad certificate: %s", error)
1356
return
1357
logger.debug("Fingerprint: %s", fpr)
1358
1359
try:
1360
client = ProxyClient(child_pipe, fpr,
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,
1361
2311
self.client_address)
1362
2312
except KeyError:
1363
2313
return
1364
2314
1365
2315
if client.approval_delay:
1366
2316
delay = client.approval_delay
1367
2317
client.approvals_pending += 1
1368
2318
approval_required = True
1369
2319
1370
2320
while True:
1371
2321
if not client.enabled:
1372
2322
logger.info("Client %s is disabled",
1373
client.name)
2323
client.name)
1374
2324
if self.server.use_dbus:
1375
2325
# Emit D-Bus signal
1376
2326
client.Rejected("Disabled")
1377
2327
return
1378
1379
if client._approved or not client.approval_delay:
1380
#We are approved or approval is disabled
2328
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1381
2331
break
1382
elif client._approved is None:
2332
elif client.approved is None:
1383
2333
logger.info("Client %s needs approval",
1384
2334
client.name)
1385
2335
if self.server.use_dbus:
1386
2336
# Emit D-Bus signal
1387
2337
client.NeedApproval(
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1390
2340
else:
1391
2341
logger.warning("Client %s was not approved",
1392
2342
client.name)
1394
2344
# Emit D-Bus signal
1395
2345
client.Rejected("Denied")
1396
2346
return
1397
1398
#wait until timeout or approved
2347
2348
# wait until timeout or approved
1399
2349
time = datetime.datetime.now()
1400
2350
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2351
client.changedstate.wait(delay.total_seconds())
1404
2352
client.changedstate.release()
1405
2353
time2 = datetime.datetime.now()
1406
2354
if (time2 - time) >= delay:
1416
2364
break
1417
2365
else:
1418
2366
delay -= time2 - time
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
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
2374
1432
2375
logger.info("Sending secret to %s", client.name)
1433
2376
# bump the timeout using extended_timeout
1434
client.checked_ok(client.extended_timeout)
2377
client.bump_timeout(client.extended_timeout)
1435
2378
if self.server.use_dbus:
1436
2379
# Emit D-Bus signal
1437
2380
client.GotSecret()
1438
2381
1439
2382
finally:
1440
2383
if approval_required:
1441
2384
client.approvals_pending -= 1
1442
2385
try:
1443
2386
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1447
2391
@staticmethod
1448
2392
def peer_certificate(session):
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
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""
1456
2409
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2410
cert_list = (gnutls.certificate_get_peers
1459
2411
(session._c_object, ctypes.byref(list_size)))
1460
2412
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2413
raise gnutls.Error("error getting peer certificate")
1463
2414
if list_size.value == 0:
1464
2415
return None
1465
2416
cert = cert_list[0]
1466
2417
return ctypes.string_at(cert.data, cert.size)
1467
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
1468
2453
@staticmethod
1469
2454
def fingerprint(openpgp):
1470
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2456
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
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)))
1477
2461
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2464
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1486
2467
# Verify the self signature in the key
1487
2468
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1491
2471
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1495
2475
# New buffer for the fingerprint
1496
2476
buf = ctypes.create_string_buffer(20)
1497
2477
buf_len = ctypes.c_size_t()
1498
2478
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1502
2481
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2482
gnutls.openpgp_crt_deinit(crt)
1504
2483
# Convert the buffer to a Python bytestring
1505
2484
fpr = ctypes.string_at(buf, buf_len.value)
1506
2485
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2486
hex_fpr = binascii.hexlify(fpr).upper()
1508
2487
return hex_fpr
1509
2488
1510
2489
1511
2490
class MultiprocessingMixIn(object):
1512
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
1513
2493
def sub_process_main(self, request, address):
1514
2494
try:
1515
2495
self.finish_request(request, address)
1516
except:
2496
except Exception:
1517
2497
self.handle_error(request, address)
1518
2498
self.close_request(request)
1519
2499
1520
2500
def process_request(self, request, address):
1521
2501
"""Start a new process to process the request."""
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
1525
2504
proc.start()
1526
2505
return proc
1527
2506
1528
2507
1529
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1530
2509
""" adds a pipe to the MixIn """
2510
1531
2511
def process_request(self, request, client_address):
1532
2512
"""Overrides and wraps the original process_request().
1533
2513
1534
2514
This function creates a new pipe in self.pipe
1535
2515
"""
1536
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1537
2517
1538
2518
proc = MultiprocessingMixIn.process_request(self, request,
1539
2519
client_address)
1540
2520
self.child_pipe.close()
1541
2521
self.add_pipe(parent_pipe, proc)
1542
2522
1543
2523
def add_pipe(self, parent_pipe, proc):
1544
2524
"""Dummy function; override as necessary"""
1545
raise NotImplementedError
2525
raise NotImplementedError()
1546
2526
1547
2527
1548
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1549
2529
socketserver.TCPServer, object):
1550
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1551
2531
1552
2532
Attributes:
1553
2533
enabled: Boolean; whether this server is activated yet
1554
2534
interface: None or a network interface name (string)
1555
2535
use_ipv6: Boolean; to use IPv6 or not
1556
2536
"""
2537
1557
2538
def __init__(self, server_address, RequestHandlerClass,
1558
interface=None, use_ipv6=True):
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
"""
1559
2545
self.interface = interface
1560
2546
if use_ipv6:
1561
2547
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.
1562
2575
socketserver.TCPServer.__init__(self, server_address,
1563
2576
RequestHandlerClass)
2577
1564
2578
def server_bind(self):
1565
2579
"""This overrides the normal server_bind() function
1566
2580
to bind to an interface if one was specified, and also NOT to
1567
2581
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
1568
2583
if self.interface is not None:
1569
2584
if SO_BINDTODEVICE is None:
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1572
self.interface)
1573
else:
1574
try:
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
1587
self.interface)
1588
else:
1589
raise
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
1590
2606
# Only bind(2) the socket if we really need to.
1591
2607
if self.server_address[0] or self.server_address[1]:
1592
2608
if not self.server_address[0]:
1593
2609
if self.address_family == socket.AF_INET6:
1594
any_address = "::" # in6addr_any
2610
any_address = "::" # in6addr_any
1595
2611
else:
1596
any_address = socket.INADDR_ANY
2612
any_address = "0.0.0.0" # INADDR_ANY
1597
2613
self.server_address = (any_address,
1598
2614
self.server_address[1])
1599
2615
elif not self.server_address[1]:
1600
self.server_address = (self.server_address[0],
1601
0)
2616
self.server_address = (self.server_address[0], 0)
1602
2617
# if self.interface:
1603
2618
# self.server_address = (self.server_address[0],
1604
2619
# 0, # port
1610
2625
1611
2626
class MandosServer(IPv6_TCPServer):
1612
2627
"""Mandos server.
1613
2628
1614
2629
Attributes:
1615
2630
clients: set of Client objects
1616
2631
gnutls_priority GnuTLS priority string
1617
2632
use_dbus: Boolean; to emit D-Bus signals or not
1618
1619
Assumes a gobject.MainLoop event loop.
2633
2634
Assumes a GLib.MainLoop event loop.
1620
2635
"""
2636
1621
2637
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2638
interface=None,
2639
use_ipv6=True,
2640
clients=None,
2641
gnutls_priority=None,
2642
use_dbus=True,
2643
socketfd=None):
1624
2644
self.enabled = False
1625
2645
self.clients = clients
1626
2646
if self.clients is None:
1627
self.clients = set()
2647
self.clients = {}
1628
2648
self.use_dbus = use_dbus
1629
2649
self.gnutls_priority = gnutls_priority
1630
2650
IPv6_TCPServer.__init__(self, server_address,
1631
2651
RequestHandlerClass,
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
2652
interface=interface,
2653
use_ipv6=use_ipv6,
2654
socketfd=socketfd)
2655
1634
2656
def server_activate(self):
1635
2657
if self.enabled:
1636
2658
return socketserver.TCPServer.server_activate(self)
1637
2659
1638
2660
def enable(self):
1639
2661
self.enabled = True
1640
2662
1641
2663
def add_pipe(self, parent_pipe, proc):
1642
2664
# Call "handle_ipc" for both data and EOF events
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
1649
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
2665
GLib.io_add_watch(
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2670
proc=proc))
2671
2672
def handle_ipc(self, source, condition,
2673
parent_pipe=None,
2674
proc=None,
2675
client_object=None):
1666
2676
# error, or the other end of multiprocessing.Pipe has closed
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1668
2678
# Wait for other process to exit
1669
2679
proc.join()
1670
2680
return False
1671
2681
1672
2682
# Read a request from the child
1673
2683
request = parent_pipe.recv()
1674
2684
command = request[0]
1675
2685
1676
2686
if command == 'init':
1677
fpr = request[1]
1678
address = request[2]
1679
1680
for c in self.clients:
1681
if c.fingerprint == fpr:
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2690
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2693
continue
2694
if key_id and c.key_id == key_id:
2695
client = c
2696
break
2697
if fpr and c.fingerprint == fpr:
1682
2698
client = c
1683
2699
break
1684
2700
else:
1685
logger.info("Client not found for fingerprint: %s, ad"
1686
"dress: %s", fpr, address)
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
1687
2703
if self.use_dbus:
1688
2704
# Emit D-Bus signal
1689
mandos_dbus_service.ClientNotFound(fpr,
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
1690
2706
address[0])
1691
2707
parent_pipe.send(False)
1692
2708
return False
1693
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
client))
2709
2710
GLib.io_add_watch(
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2715
proc=proc,
2716
client_object=client))
1702
2717
parent_pipe.send(True)
1703
2718
# remove the old hook in favor of the new above hook on
1704
2719
# same fileno
1707
2722
funcname = request[1]
1708
2723
args = request[2]
1709
2724
kwargs = request[3]
1710
2725
1711
2726
parent_pipe.send(('data', getattr(client_object,
1712
2727
funcname)(*args,
1713
**kwargs)))
1714
2728
**kwargs)))
2729
1715
2730
if command == 'getattr':
1716
2731
attrname = request[1]
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
1719
2735
else:
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1722
2736
parent_pipe.send((
2737
'data', client_object.__getattribute__(attrname)))
2738
1723
2739
if command == 'setattr':
1724
2740
attrname = request[1]
1725
2741
value = request[2]
1726
2742
setattr(client_object, attrname, value)
1727
2743
1728
2744
return True
1729
2745
1730
2746
2747
def rfc3339_duration_to_delta(duration):
2748
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2749
2750
>>> rfc3339_duration_to_delta("P7D")
2751
datetime.timedelta(7)
2752
>>> rfc3339_duration_to_delta("PT60S")
2753
datetime.timedelta(0, 60)
2754
>>> rfc3339_duration_to_delta("PT60M")
2755
datetime.timedelta(0, 3600)
2756
>>> rfc3339_duration_to_delta("PT24H")
2757
datetime.timedelta(1)
2758
>>> rfc3339_duration_to_delta("P1W")
2759
datetime.timedelta(7)
2760
>>> rfc3339_duration_to_delta("PT5M30S")
2761
datetime.timedelta(0, 330)
2762
>>> rfc3339_duration_to_delta("P1DT3M20S")
2763
datetime.timedelta(1, 200)
2764
"""
2765
2766
# Parsing an RFC 3339 duration with regular expressions is not
2767
# possible - there would have to be multiple places for the same
2768
# values, like seconds. The current code, while more esoteric, is
2769
# cleaner without depending on a parsing library. If Python had a
2770
# built-in library for parsing we would use it, but we'd like to
2771
# avoid excessive use of external libraries.
2772
2773
# New type for defining tokens, syntax, and semantics all-in-one
2774
Token = collections.namedtuple("Token", (
2775
"regexp", # To match token; if "value" is not None, must have
2776
# a "group" containing digits
2777
"value", # datetime.timedelta or None
2778
"followers")) # Tokens valid after this token
2779
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2780
# the "duration" ABNF definition in RFC 3339, Appendix A.
2781
token_end = Token(re.compile(r"$"), None, frozenset())
2782
token_second = Token(re.compile(r"(\d+)S"),
2783
datetime.timedelta(seconds=1),
2784
frozenset((token_end, )))
2785
token_minute = Token(re.compile(r"(\d+)M"),
2786
datetime.timedelta(minutes=1),
2787
frozenset((token_second, token_end)))
2788
token_hour = Token(re.compile(r"(\d+)H"),
2789
datetime.timedelta(hours=1),
2790
frozenset((token_minute, token_end)))
2791
token_time = Token(re.compile(r"T"),
2792
None,
2793
frozenset((token_hour, token_minute,
2794
token_second)))
2795
token_day = Token(re.compile(r"(\d+)D"),
2796
datetime.timedelta(days=1),
2797
frozenset((token_time, token_end)))
2798
token_month = Token(re.compile(r"(\d+)M"),
2799
datetime.timedelta(weeks=4),
2800
frozenset((token_day, token_end)))
2801
token_year = Token(re.compile(r"(\d+)Y"),
2802
datetime.timedelta(weeks=52),
2803
frozenset((token_month, token_end)))
2804
token_week = Token(re.compile(r"(\d+)W"),
2805
datetime.timedelta(weeks=1),
2806
frozenset((token_end, )))
2807
token_duration = Token(re.compile(r"P"), None,
2808
frozenset((token_year, token_month,
2809
token_day, token_time,
2810
token_week)))
2811
# Define starting values:
2812
# Value so far
2813
value = datetime.timedelta()
2814
found_token = None
2815
# Following valid tokens
2816
followers = frozenset((token_duration, ))
2817
# String left to parse
2818
s = duration
2819
# Loop until end token is found
2820
while found_token is not token_end:
2821
# Search for any currently valid tokens
2822
for token in followers:
2823
match = token.regexp.match(s)
2824
if match is not None:
2825
# Token found
2826
if token.value is not None:
2827
# Value found, parse digits
2828
factor = int(match.group(1), 10)
2829
# Add to value so far
2830
value += factor * token.value
2831
# Strip token from string
2832
s = token.regexp.sub("", s, 1)
2833
# Go to found token
2834
found_token = token
2835
# Set valid next tokens
2836
followers = found_token.followers
2837
break
2838
else:
2839
# No currently valid tokens were found
2840
raise ValueError("Invalid RFC 3339 duration: {!r}"
2841
.format(duration))
2842
# End token found
2843
return value
2844
2845
1731
2846
def string_to_delta(interval):
1732
2847
"""Parse a string and return a datetime.timedelta
1733
2848
1734
2849
>>> string_to_delta('7d')
1735
2850
datetime.timedelta(7)
1736
2851
>>> string_to_delta('60s')
1744
2859
>>> string_to_delta('5m 30s')
1745
2860
datetime.timedelta(0, 330)
1746
2861
"""
2862
2863
try:
2864
return rfc3339_duration_to_delta(interval)
2865
except ValueError:
2866
pass
2867
1747
2868
timevalue = datetime.timedelta(0)
1748
2869
for s in interval.split():
1749
2870
try:
1750
suffix = unicode(s[-1])
2871
suffix = s[-1]
1751
2872
value = int(s[:-1])
1752
2873
if suffix == "d":
1753
2874
delta = datetime.timedelta(value)
1760
2881
elif suffix == "w":
1761
2882
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1762
2883
else:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2884
raise ValueError("Unknown suffix {!r}".format(suffix))
2885
except IndexError as e:
1765
2886
raise ValueError(*(e.args))
1766
2887
timevalue += delta
1767
2888
return timevalue
1768
2889
1769
2890
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
def daemon(nochdir = False, noclose = False):
2891
def daemon(nochdir=False, noclose=False):
1795
2892
"""See daemon(3). Standard BSD Unix function.
1796
2893
1797
2894
This should really exist as os.daemon, but it doesn't (yet)."""
1798
2895
if os.fork():
1799
2896
sys.exit()
1804
2901
sys.exit()
1805
2902
if not noclose:
1806
2903
# Close all standard open file descriptors
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2904
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1808
2905
if not stat.S_ISCHR(os.fstat(null).st_mode):
1809
2906
raise OSError(errno.ENODEV,
1810
"%s not a character device"
1811
% os.path.devnull)
2907
"{} not a character device"
2908
.format(os.devnull))
1812
2909
os.dup2(null, sys.stdin.fileno())
1813
2910
os.dup2(null, sys.stdout.fileno())
1814
2911
os.dup2(null, sys.stderr.fileno())
1817
2914
1818
2915
1819
2916
def main():
1820
2917
1821
2918
##################################################################
1822
2919
# Parsing of options, both command line and config file
1823
2920
1824
2921
parser = argparse.ArgumentParser()
1825
2922
parser.add_argument("-v", "--version", action="version",
1826
version = "%%(prog)s %s" % version,
2923
version="%(prog)s {}".format(version),
1827
2924
help="show version number and exit")
1828
2925
parser.add_argument("-i", "--interface", metavar="IF",
1829
2926
help="Bind to interface IF")
1835
2932
help="Run self-test")
1836
2933
parser.add_argument("--debug", action="store_true",
1837
2934
help="Debug mode; run in foreground and log"
1838
" to terminal")
2935
" to terminal", default=None)
1839
2936
parser.add_argument("--debuglevel", metavar="LEVEL",
1840
2937
help="Debug level for stdout output")
1841
2938
parser.add_argument("--priority", help="GnuTLS"
1848
2945
" files")
1849
2946
parser.add_argument("--no-dbus", action="store_false",
1850
2947
dest="use_dbus", help="Do not provide D-Bus"
1851
" system bus interface")
2948
" system bus interface", default=None)
1852
2949
parser.add_argument("--no-ipv6", action="store_false",
1853
dest="use_ipv6", help="Do not use IPv6")
2950
dest="use_ipv6", help="Do not use IPv6",
2951
default=None)
2952
parser.add_argument("--no-restore", action="store_false",
2953
dest="restore", help="Do not restore stored"
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2958
parser.add_argument("--statedir", metavar="DIR",
2959
help="Directory to save/restore state in")
2960
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2964
default=None)
2965
1854
2966
options = parser.parse_args()
1855
2967
1856
2968
if options.check:
1857
2969
import doctest
1858
doctest.testmod()
1859
sys.exit()
1860
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2972
1861
2973
# Default values for config file for server-global settings
1862
server_defaults = { "interface": "",
1863
"address": "",
1864
"port": "",
1865
"debug": "False",
1866
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1868
"servicename": "Mandos",
1869
"use_dbus": "True",
1870
"use_ipv6": "True",
1871
"debuglevel": "",
1872
}
1873
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2977
else:
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2981
"address": "",
2982
"port": "",
2983
"debug": "False",
2984
"priority": priority,
2985
"servicename": "Mandos",
2986
"use_dbus": "True",
2987
"use_ipv6": "True",
2988
"debuglevel": "",
2989
"restore": "True",
2990
"socket": "",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2993
"zeroconf": "True",
2994
}
2995
del priority
2996
1874
2997
# Parse config file for server-global settings
1875
2998
server_config = configparser.SafeConfigParser(server_defaults)
1876
2999
del server_defaults
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1879
3001
# Convert the SafeConfigParser object to a dict
1880
3002
server_settings = server_config.defaults()
1881
3003
# Use the appropriate methods on the non-string config options
1882
for option in ("debug", "use_dbus", "use_ipv6"):
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
1883
3006
server_settings[option] = server_config.getboolean("DEFAULT",
1884
3007
option)
1885
3008
if server_settings["port"]:
1886
3009
server_settings["port"] = server_config.getint("DEFAULT",
1887
3010
"port")
3011
if server_settings["socket"]:
3012
server_settings["socket"] = server_config.getint("DEFAULT",
3013
"socket")
3014
# Later, stdin will, and stdout and stderr might, be dup'ed
3015
# over with an opened os.devnull. But we don't want this to
3016
# happen with a supplied network socket.
3017
if 0 <= server_settings["socket"] <= 2:
3018
server_settings["socket"] = os.dup(server_settings
3019
["socket"])
1888
3020
del server_config
1889
3021
1890
3022
# Override the settings from the config file with command line
1891
3023
# options, if set.
1892
3024
for option in ("interface", "address", "port", "debug",
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
1895
3028
value = getattr(options, option)
1896
3029
if value is not None:
1897
3030
server_settings[option] = value
1898
3031
del options
1899
3032
# Force all strings to be unicode
1900
3033
for option in server_settings.keys():
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3036
.decode("utf-8"))
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
3041
# Debug implies foreground
3042
if server_settings["debug"]:
3043
server_settings["foreground"] = True
1903
3044
# Now we have our good server settings in "server_settings"
1904
3045
1905
3046
##################################################################
1906
3047
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3052
1907
3053
# For convenience
1908
3054
debug = server_settings["debug"]
1909
3055
debuglevel = server_settings["debuglevel"]
1910
3056
use_dbus = server_settings["use_dbus"]
1911
3057
use_ipv6 = server_settings["use_ipv6"]
1912
3058
stored_state_path = os.path.join(server_settings["statedir"],
3059
stored_state_file)
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3062
3063
if debug:
3064
initlogger(debug, logging.DEBUG)
3065
else:
3066
if not debuglevel:
3067
initlogger(debug)
3068
else:
3069
level = getattr(logging, debuglevel.upper())
3070
initlogger(debug, level)
3071
1913
3072
if server_settings["servicename"] != "Mandos":
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
1918
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
3077
1919
3078
# Parse config file with clients
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
3080
.client_defaults)
1929
3081
client_config.read(os.path.join(server_settings["configdir"],
1930
3082
"clients.conf"))
1931
3083
1932
3084
global mandos_dbus_service
1933
3085
mandos_dbus_service = None
1934
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
1946
try:
1947
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
1950
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
1955
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
3086
3087
socketfd = None
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3092
ClientHandler,
3093
interface=(server_settings["interface"] or None),
3094
use_ipv6=use_ipv6,
3095
gnutls_priority=server_settings["priority"],
3096
use_dbus=use_dbus,
3097
socketfd=socketfd)
3098
if not foreground:
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
3102
pidfile = None
3103
try:
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3105
except IOError as e:
3106
logger.error("Could not open file %r", pidfilename,
3107
exc_info=e)
3108
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
3112
try:
3113
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
3115
break
1958
3116
except KeyError:
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
3117
continue
3118
else:
3119
uid = 65534
3120
gid = 65534
1965
3121
try:
1966
3122
os.setgid(gid)
1967
3123
os.setuid(uid)
3124
if debug:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3126
gid))
1968
3127
except OSError as error:
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1979
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
3131
raise
3132
1980
3133
if debug:
1981
3134
# Enable all possible GnuTLS debugging
1982
3135
1983
3136
# "Use a log level over 10 to enable all debugging options."
1984
3137
# - GnuTLS manual
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1986
1987
@gnutls.library.types.gnutls_log_func
3138
gnutls.global_set_log_level(11)
3139
3140
@gnutls.log_func
1988
3141
def debug_gnutls(level, string):
1989
3142
logger.debug("GnuTLS: %s", string[:-1])
1990
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1993
3143
3144
gnutls.global_set_log_function(debug_gnutls)
3145
1994
3146
# Redirect stdin so all checkers get /dev/null
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1996
3148
os.dup2(null, sys.stdin.fileno())
1997
3149
if null > 2:
1998
3150
os.close(null)
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
3151
2003
3152
# Need to fork before connecting to D-Bus
2004
if not debug:
3153
if not foreground:
2005
3154
# Close all input and output, do double fork, etc.
2006
3155
daemon()
2007
3156
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
3159
GLib.threads_init()
3160
2008
3161
global main_loop
2009
3162
# From the Avahi example code
2010
DBusGMainLoop(set_as_default=True )
2011
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2012
3165
bus = dbus.SystemBus()
2013
3166
# End of Avahi example code
2014
3167
if use_dbus:
2015
3168
try:
2016
3169
bus_name = dbus.service.BusName("se.recompile.Mandos",
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
3170
bus,
3171
do_not_queue=True)
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3174
do_not_queue=True)
3175
except dbus.exceptions.DBusException as e:
3176
logger.error("Disabling D-Bus:", exc_info=e)
2023
3177
use_dbus = False
2024
3178
server_settings["use_dbus"] = False
2025
3179
tcp_server.use_dbus = False
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2033
3180
if zeroconf:
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3185
protocol=protocol,
3186
bus=bus)
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
3190
2034
3191
global multiprocessing_manager
2035
3192
multiprocessing_manager = multiprocessing.Manager()
2036
3193
2037
3194
client_class = Client
2038
3195
if use_dbus:
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
3196
client_class = functools.partial(ClientDBus, bus=bus)
3197
3198
client_settings = Client.config_parser(client_config)
3199
old_client_settings = {}
3200
clients_data = {}
3201
3202
# This is used to redirect stdout and stderr for checker processes
3203
global wnull
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3206
# mode
3207
if debug or not foreground:
3208
wnull.close()
3209
3210
# Get client data and settings from last running state.
3211
if server_settings["restore"]:
3212
try:
3213
with open(stored_state_path, "rb") as stored_state:
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3216
stored_state)
3217
else:
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3221
# clients_data
3222
# .keys()
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3225
else key): value
3226
for key, value in
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3232
for k, v in
3233
clients_data[key].items()}
3234
clients_data[key] = value
3235
# .client_structure
3236
value["client_structure"] = [
3237
(s.decode("utf-8")
3238
if isinstance(s, bytes)
3239
else s) for s in
3240
value["client_structure"]]
3241
# .name & .host
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3250
# .keys()
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3258
# .host
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
3262
.decode("utf-8"))
3263
os.remove(stored_state_path)
3264
except IOError as e:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3268
else:
3269
logger.critical("Could not load persistent state:",
3270
exc_info=e)
3271
raise
3272
except EOFError as e:
3273
logger.warning("Could not load persistent state: "
3274
"EOFError:",
3275
exc_info=e)
3276
3277
with PGPEngine() as pgp:
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
3281
continue
3282
3283
# Decide which value to use after restoring saved state.
3284
# We have three different values: Old config file,
3285
# new config file, and saved state.
3286
# New config value takes precedence if it differs from old
3287
# config value, otherwise use saved state.
3288
for name, value in client_settings[client_name].items():
3289
try:
3290
# For each value in new config, check if it
3291
# differs from the old config value (Except for
3292
# the "secret" attribute)
3293
if (name != "secret"
3294
and (value !=
3295
old_client_settings[client_name][name])):
3296
client[name] = value
3297
except KeyError:
3298
pass
3299
3300
# Clients who has passed its expire date can still be
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3304
# downtime.
3305
if client["enabled"]:
3306
if datetime.datetime.utcnow() >= client["expires"]:
3307
if not client["last_checked_ok"]:
3308
logger.warning(
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3311
client_name))
3312
client["enabled"] = False
3313
elif client["last_checker_status"] != 0:
3314
logger.warning(
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3317
" {}".format(
3318
client_name,
3319
client["last_checker_status"]))
3320
client["enabled"] = False
3321
else:
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" keeping {} enabled".format(
3327
client_name))
2048
3328
try:
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
3332
except PGPError:
3333
# If decryption fails, we use secret from new settings
3334
logger.debug("Failed to decrypt {} old secret".format(
3335
client_name))
3336
client["secret"] = (client_settings[client_name]
3337
["secret"])
3338
3339
# Add/remove clients based on new changes made to config
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
3342
del clients_data[client_name]
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
3345
clients_data[client_name] = client_settings[client_name]
3346
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
3349
tcp_server.clients[client_name] = client_class(
3350
name=client_name,
3351
settings=client,
3352
server_settings=server_settings)
3353
2058
3354
if not tcp_server.clients:
2059
3355
logger.warning("No clients defined")
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
3356
3357
if not foreground:
3358
if pidfile is not None:
3359
pid = os.getpid()
3360
try:
3361
with pidfile:
3362
print(pid, file=pidfile)
3363
except IOError:
3364
logger.error("Could not write to file %r with PID %d",
3365
pidfilename, pid)
3366
del pidfile
2073
3367
del pidfilename
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
3368
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
3372
2080
3373
if use_dbus:
2081
class MandosDBusService(dbus.service.Object):
3374
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2082
3378
"""A D-Bus proxy object"""
3379
2083
3380
def __init__(self):
2084
3381
dbus.service.Object.__init__(self, bus, "/")
3382
2085
3383
_interface = "se.recompile.Mandos"
2086
3384
2087
3385
@dbus.service.signal(_interface, signature="o")
2088
3386
def ClientAdded(self, objpath):
2089
3387
"D-Bus signal"
2090
3388
pass
2091
3389
2092
3390
@dbus.service.signal(_interface, signature="ss")
2093
def ClientNotFound(self, fingerprint, address):
3391
def ClientNotFound(self, key_id, address):
2094
3392
"D-Bus signal"
2095
3393
pass
2096
3394
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3396
"true"})
2097
3397
@dbus.service.signal(_interface, signature="os")
2098
3398
def ClientRemoved(self, objpath, name):
2099
3399
"D-Bus signal"
2100
3400
pass
2101
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2102
3404
@dbus.service.method(_interface, out_signature="ao")
2103
3405
def GetAllClients(self):
2104
3406
"D-Bus method"
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2107
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3409
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3411
"true"})
2108
3412
@dbus.service.method(_interface,
2109
3413
out_signature="a{oa{sv}}")
2110
3414
def GetAllClientsWithProperties(self):
2111
3415
"D-Bus method"
2112
3416
return dbus.Dictionary(
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2115
3420
signature="oa{sv}")
2116
3421
2117
3422
@dbus.service.method(_interface, in_signature="o")
2118
3423
def RemoveClient(self, object_path):
2119
3424
"D-Bus method"
2120
for c in tcp_server.clients:
3425
for c in tcp_server.clients.values():
2121
3426
if c.dbus_object_path == object_path:
2122
tcp_server.clients.remove(c)
3427
del tcp_server.clients[c.name]
2123
3428
c.remove_from_connection()
2124
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2125
3430
c.disable(quiet=True)
2126
# Emit D-Bus signal
2127
self.ClientRemoved(object_path, c.name)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2128
3433
return
2129
3434
raise KeyError(object_path)
2130
3435
2131
3436
del _interface
2132
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2136
3437
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3441
"""D-Bus method"""
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3444
dbus.Dictionary(
3445
{interface: client.GetAll(interface)
3446
for interface in
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3449
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3452
if use_dbus:
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3456
dbus.Dictionary(
3457
{interface: client.GetAll(interface)
3458
for interface in
3459
client._get_all_interface_names()}))
3460
# Old signal
3461
self.ClientAdded(client.dbus_object_path)
3462
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3465
if use_dbus:
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3470
# Old signal
3471
self.ClientRemoved(client.dbus_object_path,
3472
client.name)
3473
3474
mandos_dbus_service = MandosDBusService()
3475
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3479
wn = wnull
3480
2137
3481
def cleanup():
2138
3482
"Cleanup function; run on exit"
2139
service.cleanup()
2140
2141
multiprocessing.active_children()
3483
if zeroconf:
3484
service.cleanup()
3485
3486
mp.active_children()
3487
wn.close()
3488
if not (tcp_server.clients or client_settings):
3489
return
3490
3491
# Store client before exiting. Secrets are encrypted with key
3492
# based on what config file has. If config file is
3493
# removed/edited, old secret will thus be unrecovable.
3494
clients = {}
3495
with PGPEngine() as pgp:
3496
for client in tcp_server.clients.values():
3497
key = client_settings[client.name]["secret"]
3498
client.encrypted_secret = pgp.encrypt(client.secret,
3499
key)
3500
client_dict = {}
3501
3502
# A list of attributes that can not be pickled
3503
# + secret.
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
3507
.Object):
3508
exclude.add(name)
3509
3510
client_dict["encrypted_secret"] = (client
3511
.encrypted_secret)
3512
for attr in client.client_structure:
3513
if attr not in exclude:
3514
client_dict[attr] = getattr(client, attr)
3515
3516
clients[client.name] = client_dict
3517
del client_settings[client.name]["secret"]
3518
3519
try:
3520
with tempfile.NamedTemporaryFile(
3521
mode='wb',
3522
suffix=".pickle",
3523
prefix='clients-',
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3527
protocol=2)
3528
tempname = stored_state.name
3529
os.rename(tempname, stored_state_path)
3530
except (IOError, OSError) as e:
3531
if not debug:
3532
try:
3533
os.remove(tempname)
3534
except NameError:
3535
pass
3536
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3537
logger.warning("Could not save persistent state: {}"
3538
.format(os.strerror(e.errno)))
3539
else:
3540
logger.warning("Could not save persistent state:",
3541
exc_info=e)
3542
raise
3543
3544
# Delete all clients, and settings from config
2142
3545
while tcp_server.clients:
2143
client = tcp_server.clients.pop()
3546
name, client = tcp_server.clients.popitem()
2144
3547
if use_dbus:
2145
3548
client.remove_from_connection()
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
3549
# Don't signal the disabling
2148
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
2149
3552
if use_dbus:
2150
# Emit D-Bus signal
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2154
3553
mandos_dbus_service.client_removed_signal(client)
3554
client_settings.clear()
3555
2155
3556
atexit.register(cleanup)
2156
2157
for client in tcp_server.clients:
3557
3558
for client in tcp_server.clients.values():
2158
3559
if use_dbus:
2159
# Emit D-Bus signal
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2162
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
3562
# Need to initiate checking of clients
3563
if client.enabled:
3564
client.init_checker()
3565
2163
3566
tcp_server.enable()
2164
3567
tcp_server.server_activate()
2165
3568
2166
3569
# Find out what port we got
2167
service.port = tcp_server.socket.getsockname()[1]
3570
if zeroconf:
3571
service.port = tcp_server.socket.getsockname()[1]
2168
3572
if use_ipv6:
2169
3573
logger.info("Now listening on address %r, port %d,"
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2172
3576
else: # IPv4
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2175
2176
#service.interface = tcp_server.socket.getsockname()[3]
2177
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3579
3580
# service.interface = tcp_server.socket.getsockname()[3]
3581
2178
3582
try:
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2187
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
lambda *args, **kwargs:
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
2192
3583
if zeroconf:
3584
# From the Avahi example code
3585
try:
3586
service.activate()
3587
except dbus.exceptions.DBusException as error:
3588
logger.critical("D-Bus Exception", exc_info=error)
3589
cleanup()
3590
sys.exit(1)
3591
# End of Avahi example code
3592
3593
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3594
lambda *args, **kwargs:
3595
(tcp_server.handle_request
3596
(*args[2:], **kwargs) or True))
3597
2193
3598
logger.debug("Starting main loop")
2194
3599
main_loop.run()
2195
3600
except AvahiError as error:
2196
logger.critical("AvahiError: %s", error)
3601
logger.critical("Avahi Error", exc_info=error)
2197
3602
cleanup()
2198
3603
sys.exit(1)
2199
3604
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0