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- Committer: Teddy Hogeborn
- Date: 2019-08-18 00:23:21 UTC
- Revision ID: teddy@recompile.se-20190818002321-qvjsogu0rhoyuwyc
Use the systemd sysusers.d mechanism, if present
* Makefile (SYSUSERS): New.
(install-server): Also install sysusers.d file, if $(SYSUSERS)
exists.
* debian/mandos.dirs (usr/lib/sysusers.d): New.
* sysusers.d-mandos.conf: New.
* Makefile (SYSUSERS): New.
(install-server): Also install sysusers.d file, if $(SYSUSERS)
exists.
* debian/mandos.dirs (usr/lib/sysusers.d): New.
* sysusers.d-mandos.conf: New.
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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
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# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
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
import gi
84
from gi.repository import GLib
71
85
from dbus.mainloop.glib import DBusGMainLoop
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86
import ctypes
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87
import ctypes.util
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import xml.dom.minidom
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89
import inspect
76
90
91
if sys.version_info.major == 2:
92
__metaclass__ = type
93
94
# Try to find the value of SO_BINDTODEVICE:
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95
try:
96
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
97
# newer, and it is also the most natural place for it:
78
98
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
99
except AttributeError:
80
100
try:
101
# This is where SO_BINDTODEVICE was up to and including Python
102
# 2.6, and also 3.2:
81
103
from IN import SO_BINDTODEVICE
82
104
except ImportError:
83
SO_BINDTODEVICE = None
84
85
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version = "1.3.1"
87
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#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
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console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
105
# In Python 2.7 it seems to have been removed entirely.
106
# Try running the C preprocessor:
107
try:
108
cc = subprocess.Popen(["cc", "--language=c", "-E",
109
"/dev/stdin"],
110
stdin=subprocess.PIPE,
111
stdout=subprocess.PIPE)
112
stdout = cc.communicate(
113
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
114
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
115
except (OSError, ValueError, IndexError):
116
# No value found
117
SO_BINDTODEVICE = None
118
119
if sys.version_info.major == 2:
120
str = unicode
121
122
if sys.version_info < (3, 2):
123
configparser.Configparser = configparser.SafeConfigParser
124
125
version = "1.8.7"
126
stored_state_file = "clients.pickle"
127
128
logger = logging.getLogger()
129
syslogger = None
130
131
try:
132
if_nametoindex = ctypes.cdll.LoadLibrary(
133
ctypes.util.find_library("c")).if_nametoindex
134
except (OSError, AttributeError):
135
136
def if_nametoindex(interface):
137
"Get an interface index the hard way, i.e. using fcntl()"
138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
139
with contextlib.closing(socket.socket()) as s:
140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
141
struct.pack(b"16s16x", interface))
142
interface_index = struct.unpack("I", ifreq[16:20])[0]
143
return interface_index
144
145
146
def copy_function(func):
147
"""Make a copy of a function"""
148
if sys.version_info.major == 2:
149
return types.FunctionType(func.func_code,
150
func.func_globals,
151
func.func_name,
152
func.func_defaults,
153
func.func_closure)
154
else:
155
return types.FunctionType(func.__code__,
156
func.__globals__,
157
func.__name__,
158
func.__defaults__,
159
func.__closure__)
160
161
162
def initlogger(debug, level=logging.WARNING):
163
"""init logger and add loglevel"""
164
165
global syslogger
166
syslogger = (logging.handlers.SysLogHandler(
167
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
168
address="/dev/log"))
169
syslogger.setFormatter(logging.Formatter
170
('Mandos [%(process)d]: %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(syslogger)
173
174
if debug:
175
console = logging.StreamHandler()
176
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
177
' [%(process)d]:'
178
' %(levelname)s:'
179
' %(message)s'))
180
logger.addHandler(console)
181
logger.setLevel(level)
182
183
184
class PGPError(Exception):
185
"""Exception if encryption/decryption fails"""
186
pass
187
188
189
class PGPEngine:
190
"""A simple class for OpenPGP symmetric encryption & decryption"""
191
192
def __init__(self):
193
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
194
self.gpg = "gpg"
195
try:
196
output = subprocess.check_output(["gpgconf"])
197
for line in output.splitlines():
198
name, text, path = line.split(b":")
199
if name == "gpg":
200
self.gpg = path
201
break
202
except OSError as e:
203
if e.errno != errno.ENOENT:
204
raise
205
self.gnupgargs = ['--batch',
206
'--homedir', self.tempdir,
207
'--force-mdc',
208
'--quiet']
209
# Only GPG version 1 has the --no-use-agent option.
210
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
211
self.gnupgargs.append("--no-use-agent")
212
213
def __enter__(self):
214
return self
215
216
def __exit__(self, exc_type, exc_value, traceback):
217
self._cleanup()
218
return False
219
220
def __del__(self):
221
self._cleanup()
222
223
def _cleanup(self):
224
if self.tempdir is not None:
225
# Delete contents of tempdir
226
for root, dirs, files in os.walk(self.tempdir,
227
topdown=False):
228
for filename in files:
229
os.remove(os.path.join(root, filename))
230
for dirname in dirs:
231
os.rmdir(os.path.join(root, dirname))
232
# Remove tempdir
233
os.rmdir(self.tempdir)
234
self.tempdir = None
235
236
def password_encode(self, password):
237
# Passphrase can not be empty and can not contain newlines or
238
# NUL bytes. So we prefix it and hex encode it.
239
encoded = b"mandos" + binascii.hexlify(password)
240
if len(encoded) > 2048:
241
# GnuPG can't handle long passwords, so encode differently
242
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
243
.replace(b"\n", b"\\n")
244
.replace(b"\0", b"\\x00"))
245
return encoded
246
247
def encrypt(self, data, password):
248
passphrase = self.password_encode(password)
249
with tempfile.NamedTemporaryFile(
250
dir=self.tempdir) as passfile:
251
passfile.write(passphrase)
252
passfile.flush()
253
proc = subprocess.Popen([self.gpg, '--symmetric',
254
'--passphrase-file',
255
passfile.name]
256
+ self.gnupgargs,
257
stdin=subprocess.PIPE,
258
stdout=subprocess.PIPE,
259
stderr=subprocess.PIPE)
260
ciphertext, err = proc.communicate(input=data)
261
if proc.returncode != 0:
262
raise PGPError(err)
263
return ciphertext
264
265
def decrypt(self, data, password):
266
passphrase = self.password_encode(password)
267
with tempfile.NamedTemporaryFile(
268
dir=self.tempdir) as passfile:
269
passfile.write(passphrase)
270
passfile.flush()
271
proc = subprocess.Popen([self.gpg, '--decrypt',
272
'--passphrase-file',
273
passfile.name]
274
+ self.gnupgargs,
275
stdin=subprocess.PIPE,
276
stdout=subprocess.PIPE,
277
stderr=subprocess.PIPE)
278
decrypted_plaintext, err = proc.communicate(input=data)
279
if proc.returncode != 0:
280
raise PGPError(err)
281
return decrypted_plaintext
282
283
284
# Pretend that we have an Avahi module
285
class avahi:
286
"""This isn't so much a class as it is a module-like namespace."""
287
IF_UNSPEC = -1 # avahi-common/address.h
288
PROTO_UNSPEC = -1 # avahi-common/address.h
289
PROTO_INET = 0 # avahi-common/address.h
290
PROTO_INET6 = 1 # avahi-common/address.h
291
DBUS_NAME = "org.freedesktop.Avahi"
292
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
293
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
294
DBUS_PATH_SERVER = "/"
295
296
@staticmethod
297
def string_array_to_txt_array(t):
298
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
299
for s in t), signature="ay")
300
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
301
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
302
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
303
SERVER_INVALID = 0 # avahi-common/defs.h
304
SERVER_REGISTERING = 1 # avahi-common/defs.h
305
SERVER_RUNNING = 2 # avahi-common/defs.h
306
SERVER_COLLISION = 3 # avahi-common/defs.h
307
SERVER_FAILURE = 4 # avahi-common/defs.h
308
103
309
104
310
class AvahiError(Exception):
105
311
def __init__(self, value, *args, **kwargs):
106
312
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
313
return super(AvahiError, self).__init__(value, *args,
314
**kwargs)
315
110
316
111
317
class AvahiServiceError(AvahiError):
112
318
pass
113
319
320
114
321
class AvahiGroupError(AvahiError):
115
322
pass
116
323
117
324
118
class AvahiService(object):
325
class AvahiService:
119
326
"""An Avahi (Zeroconf) service.
120
327
121
328
Attributes:
122
329
interface: integer; avahi.IF_UNSPEC or an interface index.
123
330
Used to optionally bind to the specified interface.
124
331
name: string; Example: 'Mandos'
125
332
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
333
See <https://www.iana.org/assignments/service-names-port-numbers>
127
334
port: integer; what port to announce
128
335
TXT: list of strings; TXT record for the service
129
336
domain: string; Domain to publish on, default to .local if empty.
135
342
server: D-Bus Server
136
343
bus: dbus.SystemBus()
137
344
"""
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):
345
346
def __init__(self,
347
interface=avahi.IF_UNSPEC,
348
name=None,
349
servicetype=None,
350
port=None,
351
TXT=None,
352
domain="",
353
host="",
354
max_renames=32768,
355
protocol=avahi.PROTO_UNSPEC,
356
bus=None):
142
357
self.interface = interface
143
358
self.name = name
144
359
self.type = servicetype
153
368
self.server = None
154
369
self.bus = bus
155
370
self.entry_group_state_changed_match = None
156
def rename(self):
371
372
def rename(self, remove=True):
157
373
"""Derived from the Avahi example code"""
158
374
if self.rename_count >= self.max_renames:
159
375
logger.critical("No suitable Zeroconf service name found"
160
376
" after %i retries, exiting.",
161
377
self.rename_count)
162
378
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
379
self.name = str(
380
self.server.GetAlternativeServiceName(self.name))
381
self.rename_count += 1
165
382
logger.info("Changing Zeroconf service name to %r ...",
166
383
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
384
if remove:
385
self.remove()
172
386
try:
173
387
self.add()
174
388
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
389
if (error.get_dbus_name()
390
== "org.freedesktop.Avahi.CollisionError"):
391
logger.info("Local Zeroconf service name collision.")
392
return self.rename(remove=False)
393
else:
394
logger.critical("D-Bus Exception", exc_info=error)
395
self.cleanup()
396
os._exit(1)
397
179
398
def remove(self):
180
399
"""Derived from the Avahi example code"""
181
400
if self.entry_group_state_changed_match is not None:
183
402
self.entry_group_state_changed_match = None
184
403
if self.group is not None:
185
404
self.group.Reset()
405
186
406
def add(self):
187
407
"""Derived from the Avahi example code"""
188
408
self.remove()
193
413
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
414
self.entry_group_state_changed_match = (
195
415
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
416
'StateChanged', self.entry_group_state_changed))
197
417
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
418
self.name, self.type)
199
419
self.group.AddService(
205
425
dbus.UInt16(self.port),
206
426
avahi.string_array_to_txt_array(self.TXT))
207
427
self.group.Commit()
428
208
429
def entry_group_state_changed(self, state, error):
209
430
"""Derived from the Avahi example code"""
210
431
logger.debug("Avahi entry group state change: %i", state)
211
432
212
433
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
434
logger.debug("Zeroconf service established.")
214
435
elif state == avahi.ENTRY_GROUP_COLLISION:
216
437
self.rename()
217
438
elif state == avahi.ENTRY_GROUP_FAILURE:
218
439
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
440
str(error))
441
raise AvahiGroupError("State changed: {!s}".format(error))
442
222
443
def cleanup(self):
223
444
"""Derived from the Avahi example code"""
224
445
if self.group is not None:
225
446
try:
226
447
self.group.Free()
227
448
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
449
dbus.exceptions.DBusException):
229
450
pass
230
451
self.group = None
231
452
self.remove()
453
232
454
def server_state_changed(self, state, error=None):
233
455
"""Derived from the Avahi example code"""
234
456
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" }
457
bad_states = {
458
avahi.SERVER_INVALID: "Zeroconf server invalid",
459
avahi.SERVER_REGISTERING: None,
460
avahi.SERVER_COLLISION: "Zeroconf server name collision",
461
avahi.SERVER_FAILURE: "Zeroconf server failure",
462
}
242
463
if state in bad_states:
243
464
if bad_states[state] is not None:
244
465
if error is None:
247
468
logger.error(bad_states[state] + ": %r", error)
248
469
self.cleanup()
249
470
elif state == avahi.SERVER_RUNNING:
250
self.add()
471
try:
472
self.add()
473
except dbus.exceptions.DBusException as error:
474
if (error.get_dbus_name()
475
== "org.freedesktop.Avahi.CollisionError"):
476
logger.info("Local Zeroconf service name"
477
" collision.")
478
return self.rename(remove=False)
479
else:
480
logger.critical("D-Bus Exception", exc_info=error)
481
self.cleanup()
482
os._exit(1)
251
483
else:
252
484
if error is None:
253
485
logger.debug("Unknown state: %r", state)
254
486
else:
255
487
logger.debug("Unknown state: %r: %r", state, error)
488
256
489
def activate(self):
257
490
"""Derived from the Avahi example code"""
258
491
if self.server is None:
262
495
follow_name_owner_changes=True),
263
496
avahi.DBUS_INTERFACE_SERVER)
264
497
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
498
self.server_state_changed)
266
499
self.server_state_changed(self.server.GetState())
267
500
268
501
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
275
class Client(object):
502
class AvahiServiceToSyslog(AvahiService):
503
def rename(self, *args, **kwargs):
504
"""Add the new name to the syslog messages"""
505
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
506
syslogger.setFormatter(logging.Formatter(
507
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
508
.format(self.name)))
509
return ret
510
511
512
# Pretend that we have a GnuTLS module
513
class gnutls:
514
"""This isn't so much a class as it is a module-like namespace."""
515
516
library = ctypes.util.find_library("gnutls")
517
if library is None:
518
library = ctypes.util.find_library("gnutls-deb0")
519
_library = ctypes.cdll.LoadLibrary(library)
520
del library
521
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
524
525
# Constants
526
E_SUCCESS = 0
527
E_INTERRUPTED = -52
528
E_AGAIN = -28
529
CRT_OPENPGP = 2
530
CRT_RAWPK = 3
531
CLIENT = 2
532
SHUT_RDWR = 0
533
CRD_CERTIFICATE = 1
534
E_NO_CERTIFICATE_FOUND = -49
535
X509_FMT_DER = 0
536
NO_TICKETS = 1<<10
537
ENABLE_RAWPK = 1<<18
538
CTYPE_PEERS = 3
539
KEYID_USE_SHA256 = 1 # gnutls/x509.h
540
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
541
542
# Types
543
class session_int(ctypes.Structure):
544
_fields_ = []
545
session_t = ctypes.POINTER(session_int)
546
547
class certificate_credentials_st(ctypes.Structure):
548
_fields_ = []
549
certificate_credentials_t = ctypes.POINTER(
550
certificate_credentials_st)
551
certificate_type_t = ctypes.c_int
552
553
class datum_t(ctypes.Structure):
554
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
555
('size', ctypes.c_uint)]
556
557
class openpgp_crt_int(ctypes.Structure):
558
_fields_ = []
559
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
560
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
561
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
562
credentials_type_t = ctypes.c_int
563
transport_ptr_t = ctypes.c_void_p
564
close_request_t = ctypes.c_int
565
566
# Exceptions
567
class Error(Exception):
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = gnutls.strerror(code)
575
return super(gnutls.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials:
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession:
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls_flags = gnutls.CLIENT
596
if gnutls.check_version(b"3.5.6"):
597
gnutls_flags |= gnutls.NO_TICKETS
598
if gnutls.has_rawpk:
599
gnutls_flags |= gnutls.ENABLE_RAWPK
600
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
601
del gnutls_flags
602
gnutls.set_default_priority(self._c_object)
603
gnutls.transport_set_ptr(self._c_object, socket.fileno())
604
gnutls.handshake_set_private_extensions(self._c_object,
605
True)
606
self.socket = socket
607
if credentials is None:
608
credentials = gnutls.Credentials()
609
gnutls.credentials_set(self._c_object, credentials.type,
610
ctypes.cast(credentials._c_object,
611
ctypes.c_void_p))
612
self.credentials = credentials
613
614
def __del__(self):
615
gnutls.deinit(self._c_object)
616
617
def handshake(self):
618
return gnutls.handshake(self._c_object)
619
620
def send(self, data):
621
data = bytes(data)
622
data_len = len(data)
623
while data_len > 0:
624
data_len -= gnutls.record_send(self._c_object,
625
data[-data_len:],
626
data_len)
627
628
def bye(self):
629
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
630
631
# Error handling functions
632
def _error_code(result):
633
"""A function to raise exceptions on errors, suitable
634
for the 'restype' attribute on ctypes functions"""
635
if result >= 0:
636
return result
637
if result == gnutls.E_NO_CERTIFICATE_FOUND:
638
raise gnutls.CertificateSecurityError(code=result)
639
raise gnutls.Error(code=result)
640
641
def _retry_on_error(result, func, arguments):
642
"""A function to retry on some errors, suitable
643
for the 'errcheck' attribute on ctypes functions"""
644
while result < 0:
645
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
646
return _error_code(result)
647
result = func(*arguments)
648
return result
649
650
# Unless otherwise indicated, the function declarations below are
651
# all from the gnutls/gnutls.h C header file.
652
653
# Functions
654
priority_set_direct = _library.gnutls_priority_set_direct
655
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
656
ctypes.POINTER(ctypes.c_char_p)]
657
priority_set_direct.restype = _error_code
658
659
init = _library.gnutls_init
660
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
661
init.restype = _error_code
662
663
set_default_priority = _library.gnutls_set_default_priority
664
set_default_priority.argtypes = [session_t]
665
set_default_priority.restype = _error_code
666
667
record_send = _library.gnutls_record_send
668
record_send.argtypes = [session_t, ctypes.c_void_p,
669
ctypes.c_size_t]
670
record_send.restype = ctypes.c_ssize_t
671
record_send.errcheck = _retry_on_error
672
673
certificate_allocate_credentials = (
674
_library.gnutls_certificate_allocate_credentials)
675
certificate_allocate_credentials.argtypes = [
676
ctypes.POINTER(certificate_credentials_t)]
677
certificate_allocate_credentials.restype = _error_code
678
679
certificate_free_credentials = (
680
_library.gnutls_certificate_free_credentials)
681
certificate_free_credentials.argtypes = [
682
certificate_credentials_t]
683
certificate_free_credentials.restype = None
684
685
handshake_set_private_extensions = (
686
_library.gnutls_handshake_set_private_extensions)
687
handshake_set_private_extensions.argtypes = [session_t,
688
ctypes.c_int]
689
handshake_set_private_extensions.restype = None
690
691
credentials_set = _library.gnutls_credentials_set
692
credentials_set.argtypes = [session_t, credentials_type_t,
693
ctypes.c_void_p]
694
credentials_set.restype = _error_code
695
696
strerror = _library.gnutls_strerror
697
strerror.argtypes = [ctypes.c_int]
698
strerror.restype = ctypes.c_char_p
699
700
certificate_type_get = _library.gnutls_certificate_type_get
701
certificate_type_get.argtypes = [session_t]
702
certificate_type_get.restype = _error_code
703
704
certificate_get_peers = _library.gnutls_certificate_get_peers
705
certificate_get_peers.argtypes = [session_t,
706
ctypes.POINTER(ctypes.c_uint)]
707
certificate_get_peers.restype = ctypes.POINTER(datum_t)
708
709
global_set_log_level = _library.gnutls_global_set_log_level
710
global_set_log_level.argtypes = [ctypes.c_int]
711
global_set_log_level.restype = None
712
713
global_set_log_function = _library.gnutls_global_set_log_function
714
global_set_log_function.argtypes = [log_func]
715
global_set_log_function.restype = None
716
717
deinit = _library.gnutls_deinit
718
deinit.argtypes = [session_t]
719
deinit.restype = None
720
721
handshake = _library.gnutls_handshake
722
handshake.argtypes = [session_t]
723
handshake.restype = _error_code
724
handshake.errcheck = _retry_on_error
725
726
transport_set_ptr = _library.gnutls_transport_set_ptr
727
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
728
transport_set_ptr.restype = None
729
730
bye = _library.gnutls_bye
731
bye.argtypes = [session_t, close_request_t]
732
bye.restype = _error_code
733
bye.errcheck = _retry_on_error
734
735
check_version = _library.gnutls_check_version
736
check_version.argtypes = [ctypes.c_char_p]
737
check_version.restype = ctypes.c_char_p
738
739
_need_version = b"3.3.0"
740
if check_version(_need_version) is None:
741
raise self.Error("Needs GnuTLS {} or later"
742
.format(_need_version))
743
744
_tls_rawpk_version = b"3.6.6"
745
has_rawpk = bool(check_version(_tls_rawpk_version))
746
747
if has_rawpk:
748
# Types
749
class pubkey_st(ctypes.Structure):
750
_fields = []
751
pubkey_t = ctypes.POINTER(pubkey_st)
752
753
x509_crt_fmt_t = ctypes.c_int
754
755
# All the function declarations below are from gnutls/abstract.h
756
pubkey_init = _library.gnutls_pubkey_init
757
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
758
pubkey_init.restype = _error_code
759
760
pubkey_import = _library.gnutls_pubkey_import
761
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
762
x509_crt_fmt_t]
763
pubkey_import.restype = _error_code
764
765
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
766
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
767
ctypes.POINTER(ctypes.c_ubyte),
768
ctypes.POINTER(ctypes.c_size_t)]
769
pubkey_get_key_id.restype = _error_code
770
771
pubkey_deinit = _library.gnutls_pubkey_deinit
772
pubkey_deinit.argtypes = [pubkey_t]
773
pubkey_deinit.restype = None
774
else:
775
# All the function declarations below are from gnutls/openpgp.h
776
777
openpgp_crt_init = _library.gnutls_openpgp_crt_init
778
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
779
openpgp_crt_init.restype = _error_code
780
781
openpgp_crt_import = _library.gnutls_openpgp_crt_import
782
openpgp_crt_import.argtypes = [openpgp_crt_t,
783
ctypes.POINTER(datum_t),
784
openpgp_crt_fmt_t]
785
openpgp_crt_import.restype = _error_code
786
787
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
788
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
789
ctypes.POINTER(ctypes.c_uint)]
790
openpgp_crt_verify_self.restype = _error_code
791
792
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
793
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
794
openpgp_crt_deinit.restype = None
795
796
openpgp_crt_get_fingerprint = (
797
_library.gnutls_openpgp_crt_get_fingerprint)
798
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
ctypes.c_void_p,
800
ctypes.POINTER(
801
ctypes.c_size_t)]
802
openpgp_crt_get_fingerprint.restype = _error_code
803
804
if check_version(b"3.6.4"):
805
certificate_type_get2 = _library.gnutls_certificate_type_get2
806
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
807
certificate_type_get2.restype = _error_code
808
809
# Remove non-public functions
810
del _error_code, _retry_on_error
811
812
813
def call_pipe(connection, # : multiprocessing.Connection
814
func, *args, **kwargs):
815
"""This function is meant to be called by multiprocessing.Process
816
817
This function runs func(*args, **kwargs), and writes the resulting
818
return value on the provided multiprocessing.Connection.
819
"""
820
connection.send(func(*args, **kwargs))
821
connection.close()
822
823
824
class Client:
276
825
"""A representation of a client host served by this server.
277
826
278
827
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
828
approved: bool(); 'None' if not yet approved/disapproved
280
829
approval_delay: datetime.timedelta(); Time to wait for approval
281
830
approval_duration: datetime.timedelta(); Duration of one approval
282
checker: subprocess.Popen(); a running checker process used
283
to see if the client lives.
284
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
831
checker: multiprocessing.Process(); a running checker process used
832
to see if the client lives. 'None' if no process is
833
running.
834
checker_callback_tag: a GLib event source tag, or None
286
835
checker_command: string; External command which is run to check
287
836
if client lives. %() expansions are done at
288
837
runtime with vars(self) as dict, so that for
289
838
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
839
checker_initiator_tag: a GLib event source tag, or None
291
840
created: datetime.datetime(); (UTC) object creation
841
client_structure: Object describing what attributes a client has
842
and is used for storing the client at exit
292
843
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
844
disable_initiator_tag: a GLib event source tag, or None
295
845
enabled: bool()
296
846
fingerprint: string (40 or 32 hexadecimal digits); used to
297
uniquely identify the client
847
uniquely identify an OpenPGP client
848
key_id: string (64 hexadecimal digits); used to uniquely identify
849
a client using raw public keys
298
850
host: string; available for use by the checker command
299
851
interval: datetime.timedelta(); How often to start a new checker
300
852
last_approval_request: datetime.datetime(); (UTC) or None
301
853
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
854
last_checker_status: integer between 0 and 255 reflecting exit
855
status of last checker. -1 reflects crashed
856
checker, -2 means no checker completed yet.
857
last_checker_signal: The signal which killed the last checker, if
858
last_checker_status is -1
859
last_enabled: datetime.datetime(); (UTC) or None
303
860
name: string; from the config file, used in log messages and
304
861
D-Bus identifiers
305
862
secret: bytestring; sent verbatim (over TLS) to client
306
863
timeout: datetime.timedelta(); How long from last_checked_ok
307
864
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
865
extended_timeout: extra long timeout when secret has been sent
309
866
runtime_expansions: Allowed attributes for runtime expansion.
310
867
expires: datetime.datetime(); time (UTC) when a client will be
311
868
disabled, or None
869
server_settings: The server_settings dict from main()
312
870
"""
313
871
314
872
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
873
"created", "enabled", "expires", "key_id",
874
"fingerprint", "host", "interval",
875
"last_approval_request", "last_checked_ok",
317
876
"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."""
877
client_defaults = {
878
"timeout": "PT5M",
879
"extended_timeout": "PT15M",
880
"interval": "PT2M",
881
"checker": "fping -q -- %%(host)s",
882
"host": "",
883
"approval_delay": "PT0S",
884
"approval_duration": "PT1S",
885
"approved_by_default": "True",
886
"enabled": "True",
887
}
888
889
@staticmethod
890
def config_parser(config):
891
"""Construct a new dict of client settings of this form:
892
{ client_name: {setting_name: value, ...}, ...}
893
with exceptions for any special settings as defined above.
894
NOTE: Must be a pure function. Must return the same result
895
value given the same arguments.
896
"""
897
settings = {}
898
for client_name in config.sections():
899
section = dict(config.items(client_name))
900
client = settings[client_name] = {}
901
902
client["host"] = section["host"]
903
# Reformat values from string types to Python types
904
client["approved_by_default"] = config.getboolean(
905
client_name, "approved_by_default")
906
client["enabled"] = config.getboolean(client_name,
907
"enabled")
908
909
# Uppercase and remove spaces from key_id and fingerprint
910
# for later comparison purposes with return value from the
911
# key_id() and fingerprint() functions
912
client["key_id"] = (section.get("key_id", "").upper()
913
.replace(" ", ""))
914
client["fingerprint"] = (section["fingerprint"].upper()
915
.replace(" ", ""))
916
if "secret" in section:
917
client["secret"] = codecs.decode(section["secret"]
918
.encode("utf-8"),
919
"base64")
920
elif "secfile" in section:
921
with open(os.path.expanduser(os.path.expandvars
922
(section["secfile"])),
923
"rb") as secfile:
924
client["secret"] = secfile.read()
925
else:
926
raise TypeError("No secret or secfile for section {}"
927
.format(section))
928
client["timeout"] = string_to_delta(section["timeout"])
929
client["extended_timeout"] = string_to_delta(
930
section["extended_timeout"])
931
client["interval"] = string_to_delta(section["interval"])
932
client["approval_delay"] = string_to_delta(
933
section["approval_delay"])
934
client["approval_duration"] = string_to_delta(
935
section["approval_duration"])
936
client["checker_command"] = section["checker"]
937
client["last_approval_request"] = None
938
client["last_checked_ok"] = None
939
client["last_checker_status"] = -2
940
941
return settings
942
943
def __init__(self, settings, name=None, server_settings=None):
338
944
self.name = name
339
if config is None:
340
config = {}
945
if server_settings is None:
946
server_settings = {}
947
self.server_settings = server_settings
948
# adding all client settings
949
for setting, value in settings.items():
950
setattr(self, setting, value)
951
952
if self.enabled:
953
if not hasattr(self, "last_enabled"):
954
self.last_enabled = datetime.datetime.utcnow()
955
if not hasattr(self, "expires"):
956
self.expires = (datetime.datetime.utcnow()
957
+ self.timeout)
958
else:
959
self.last_enabled = None
960
self.expires = None
961
341
962
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(" ", ""))
963
logger.debug(" Key ID: %s", self.key_id)
347
964
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
965
self.created = settings.get("created",
966
datetime.datetime.utcnow())
967
968
# attributes specific for this server instance
369
969
self.checker = None
370
970
self.checker_initiator_tag = None
371
971
self.disable_initiator_tag = None
372
self.expires = None
373
972
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
973
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)
974
self.approved = None
380
975
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
976
self.changedstate = multiprocessing_manager.Condition(
977
multiprocessing_manager.Lock())
978
self.client_structure = [attr
979
for attr in self.__dict__.keys()
980
if not attr.startswith("_")]
981
self.client_structure.append("client_structure")
982
983
for name, t in inspect.getmembers(
984
type(self), lambda obj: isinstance(obj, property)):
985
if not name.startswith("_"):
986
self.client_structure.append(name)
987
988
# Send notice to process children that client state has changed
389
989
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
990
with self.changedstate:
991
self.changedstate.notify_all()
992
394
993
def enable(self):
395
994
"""Start this client's checker and timeout hooks"""
396
995
if getattr(self, "enabled", False):
397
996
# Already enabled
398
997
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
998
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
999
self.enabled = True
411
1000
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
1001
self.init_checker()
1002
self.send_changedstate()
1003
415
1004
def disable(self, quiet=True):
416
1005
"""Disable this client."""
417
1006
if not getattr(self, "enabled", False):
418
1007
return False
419
1008
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
1009
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1010
if getattr(self, "disable_initiator_tag", None) is not None:
1011
GLib.source_remove(self.disable_initiator_tag)
425
1012
self.disable_initiator_tag = None
426
1013
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1014
if getattr(self, "checker_initiator_tag", None) is not None:
1015
GLib.source_remove(self.checker_initiator_tag)
429
1016
self.checker_initiator_tag = None
430
1017
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
1018
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
1019
if not quiet:
1020
self.send_changedstate()
1021
# Do not run this again if called by a GLib.timeout_add
435
1022
return False
436
1023
437
1024
def __del__(self):
438
self.disable_hook = None
439
1025
self.disable()
440
441
def checker_callback(self, pid, condition, command):
1026
1027
def init_checker(self):
1028
# Schedule a new checker to be started an 'interval' from now,
1029
# and every interval from then on.
1030
if self.checker_initiator_tag is not None:
1031
GLib.source_remove(self.checker_initiator_tag)
1032
self.checker_initiator_tag = GLib.timeout_add(
1033
int(self.interval.total_seconds() * 1000),
1034
self.start_checker)
1035
# Schedule a disable() when 'timeout' has passed
1036
if self.disable_initiator_tag is not None:
1037
GLib.source_remove(self.disable_initiator_tag)
1038
self.disable_initiator_tag = GLib.timeout_add(
1039
int(self.timeout.total_seconds() * 1000), self.disable)
1040
# Also start a new checker *right now*.
1041
self.start_checker()
1042
1043
def checker_callback(self, source, condition, connection,
1044
command):
442
1045
"""The checker has completed, so take appropriate actions."""
1046
# Read return code from connection (see call_pipe)
1047
returncode = connection.recv()
1048
connection.close()
1049
self.checker.join()
443
1050
self.checker_callback_tag = None
444
1051
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1052
1053
if returncode >= 0:
1054
self.last_checker_status = returncode
1055
self.last_checker_signal = None
1056
if self.last_checker_status == 0:
448
1057
logger.info("Checker for %(name)s succeeded",
449
1058
vars(self))
450
1059
self.checked_ok()
451
1060
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1061
logger.info("Checker for %(name)s failed", vars(self))
454
1062
else:
1063
self.last_checker_status = -1
1064
self.last_checker_signal = -returncode
455
1065
logger.warning("Checker for %(name)s crashed?",
456
1066
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
"""
1067
return False
1068
1069
def checked_ok(self):
1070
"""Assert that the client has been seen, alive and well."""
1071
self.last_checked_ok = datetime.datetime.utcnow()
1072
self.last_checker_status = 0
1073
self.last_checker_signal = None
1074
self.bump_timeout()
1075
1076
def bump_timeout(self, timeout=None):
1077
"""Bump up the timeout for this client."""
464
1078
if timeout is None:
465
1079
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
472
1080
if self.disable_initiator_tag is not None:
1081
GLib.source_remove(self.disable_initiator_tag)
1082
self.disable_initiator_tag = None
1083
if getattr(self, "enabled", False):
1084
self.disable_initiator_tag = GLib.timeout_add(
1085
int(timeout.total_seconds() * 1000), self.disable)
1086
self.expires = datetime.datetime.utcnow() + timeout
1087
473
1088
def need_approval(self):
474
1089
self.last_approval_request = datetime.datetime.utcnow()
475
1090
476
1091
def start_checker(self):
477
1092
"""Start a new checker subprocess if one is not running.
478
1093
479
1094
If a checker already exists, leave it running and do
480
1095
nothing."""
481
1096
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
1097
# did that, and if a checker (for some reason) started running
1098
# slowly and taking more than 'interval' time, then the client
1099
# would inevitably timeout, since no checker would get a
1100
# chance to run to completion. If we instead leave running
486
1101
# checkers alone, the checker would have to take more time
487
1102
# than 'timeout' for the client to be disabled, which is as it
488
1103
# should be.
489
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
1104
1105
if self.checker is not None and not self.checker.is_alive():
1106
logger.warning("Checker was not alive; joining")
1107
self.checker.join()
1108
self.checker = None
503
1109
# Start a new checker if needed
504
1110
if self.checker is None:
1111
# Escape attributes for the shell
1112
escaped_attrs = {
1113
attr: re.escape(str(getattr(self, attr)))
1114
for attr in self.runtime_expansions}
505
1115
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
1116
command = self.checker_command % escaped_attrs
1117
except TypeError as error:
1118
logger.error('Could not format string "%s"',
1119
self.checker_command,
1120
exc_info=error)
1121
return True # Try again later
524
1122
self.current_checker_command = command
525
try:
526
logger.info("Starting checker %r for %s",
527
command, self.name)
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
533
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
error)
548
# Re-run this periodically if run by gobject.timeout_add
1123
logger.info("Starting checker %r for %s", command,
1124
self.name)
1125
# We don't need to redirect stdout and stderr, since
1126
# in normal mode, that is already done by daemon(),
1127
# and in debug mode we don't want to. (Stdin is
1128
# always replaced by /dev/null.)
1129
# The exception is when not debugging but nevertheless
1130
# running in the foreground; use the previously
1131
# created wnull.
1132
popen_args = {"close_fds": True,
1133
"shell": True,
1134
"cwd": "/"}
1135
if (not self.server_settings["debug"]
1136
and self.server_settings["foreground"]):
1137
popen_args.update({"stdout": wnull,
1138
"stderr": wnull})
1139
pipe = multiprocessing.Pipe(duplex=False)
1140
self.checker = multiprocessing.Process(
1141
target=call_pipe,
1142
args=(pipe[1], subprocess.call, command),
1143
kwargs=popen_args)
1144
self.checker.start()
1145
self.checker_callback_tag = GLib.io_add_watch(
1146
pipe[0].fileno(), GLib.IO_IN,
1147
self.checker_callback, pipe[0], command)
1148
# Re-run this periodically if run by GLib.timeout_add
549
1149
return True
550
1150
551
1151
def stop_checker(self):
552
1152
"""Force the checker process, if any, to stop."""
553
1153
if self.checker_callback_tag:
554
gobject.source_remove(self.checker_callback_tag)
1154
GLib.source_remove(self.checker_callback_tag)
555
1155
self.checker_callback_tag = None
556
1156
if getattr(self, "checker", None) is None:
557
1157
return
558
1158
logger.debug("Stopping checker for %(name)s", vars(self))
559
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
561
#time.sleep(0.5)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
566
raise
1159
self.checker.terminate()
567
1160
self.checker = None
568
1161
569
1162
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1163
def dbus_service_property(dbus_interface,
1164
signature="v",
1165
access="readwrite",
1166
byte_arrays=False):
572
1167
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1168
become properties on the D-Bus.
574
1169
575
1170
The decorated method will be called with no arguments by "Get"
576
1171
and with one argument by "Set".
577
1172
578
1173
The parameters, where they are supported, are the same as
579
1174
dbus.service.method, except there is only "signature", since the
580
1175
type from Get() and the type sent to Set() is the same.
583
1178
# "Set" method, so we fail early here:
584
1179
if byte_arrays and signature != "ay":
585
1180
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
1181
" signature {!r}".format(signature))
1182
587
1183
def decorator(func):
588
1184
func._dbus_is_property = True
589
1185
func._dbus_interface = dbus_interface
592
1188
func._dbus_name = func.__name__
593
1189
if func._dbus_name.endswith("_dbus_property"):
594
1190
func._dbus_name = func._dbus_name[:-14]
595
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
return func
1191
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1192
return func
1193
1194
return decorator
1195
1196
1197
def dbus_interface_annotations(dbus_interface):
1198
"""Decorator for marking functions returning interface annotations
1199
1200
Usage:
1201
1202
@dbus_interface_annotations("org.example.Interface")
1203
def _foo(self): # Function name does not matter
1204
return {"org.freedesktop.DBus.Deprecated": "true",
1205
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1206
"false"}
1207
"""
1208
1209
def decorator(func):
1210
func._dbus_is_interface = True
1211
func._dbus_interface = dbus_interface
1212
func._dbus_name = dbus_interface
1213
return func
1214
1215
return decorator
1216
1217
1218
def dbus_annotations(annotations):
1219
"""Decorator to annotate D-Bus methods, signals or properties
1220
Usage:
1221
1222
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1223
"org.freedesktop.DBus.Property."
1224
"EmitsChangedSignal": "false"})
1225
@dbus_service_property("org.example.Interface", signature="b",
1226
access="r")
1227
def Property_dbus_property(self):
1228
return dbus.Boolean(False)
1229
1230
See also the DBusObjectWithAnnotations class.
1231
"""
1232
1233
def decorator(func):
1234
func._dbus_annotations = annotations
1235
return func
1236
597
1237
return decorator
598
1238
599
1239
600
1240
class DBusPropertyException(dbus.exceptions.DBusException):
601
1241
"""A base class for D-Bus property-related exceptions
602
1242
"""
603
def __unicode__(self):
604
return unicode(str(self))
1243
pass
605
1244
606
1245
607
1246
class DBusPropertyAccessException(DBusPropertyException):
616
1255
pass
617
1256
618
1257
619
class DBusObjectWithProperties(dbus.service.Object):
1258
class DBusObjectWithAnnotations(dbus.service.Object):
1259
"""A D-Bus object with annotations.
1260
1261
Classes inheriting from this can use the dbus_annotations
1262
decorator to add annotations to methods or signals.
1263
"""
1264
1265
@staticmethod
1266
def _is_dbus_thing(thing):
1267
"""Returns a function testing if an attribute is a D-Bus thing
1268
1269
If called like _is_dbus_thing("method") it returns a function
1270
suitable for use as predicate to inspect.getmembers().
1271
"""
1272
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1273
False)
1274
1275
def _get_all_dbus_things(self, thing):
1276
"""Returns a generator of (name, attribute) pairs
1277
"""
1278
return ((getattr(athing.__get__(self), "_dbus_name", name),
1279
athing.__get__(self))
1280
for cls in self.__class__.__mro__
1281
for name, athing in
1282
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1283
1284
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1285
out_signature="s",
1286
path_keyword='object_path',
1287
connection_keyword='connection')
1288
def Introspect(self, object_path, connection):
1289
"""Overloading of standard D-Bus method.
1290
1291
Inserts annotation tags on methods and signals.
1292
"""
1293
xmlstring = dbus.service.Object.Introspect(self, object_path,
1294
connection)
1295
try:
1296
document = xml.dom.minidom.parseString(xmlstring)
1297
1298
for if_tag in document.getElementsByTagName("interface"):
1299
# Add annotation tags
1300
for typ in ("method", "signal"):
1301
for tag in if_tag.getElementsByTagName(typ):
1302
annots = dict()
1303
for name, prop in (self.
1304
_get_all_dbus_things(typ)):
1305
if (name == tag.getAttribute("name")
1306
and prop._dbus_interface
1307
== if_tag.getAttribute("name")):
1308
annots.update(getattr(
1309
prop, "_dbus_annotations", {}))
1310
for name, value in annots.items():
1311
ann_tag = document.createElement(
1312
"annotation")
1313
ann_tag.setAttribute("name", name)
1314
ann_tag.setAttribute("value", value)
1315
tag.appendChild(ann_tag)
1316
# Add interface annotation tags
1317
for annotation, value in dict(
1318
itertools.chain.from_iterable(
1319
annotations().items()
1320
for name, annotations
1321
in self._get_all_dbus_things("interface")
1322
if name == if_tag.getAttribute("name")
1323
)).items():
1324
ann_tag = document.createElement("annotation")
1325
ann_tag.setAttribute("name", annotation)
1326
ann_tag.setAttribute("value", value)
1327
if_tag.appendChild(ann_tag)
1328
# Fix argument name for the Introspect method itself
1329
if (if_tag.getAttribute("name")
1330
== dbus.INTROSPECTABLE_IFACE):
1331
for cn in if_tag.getElementsByTagName("method"):
1332
if cn.getAttribute("name") == "Introspect":
1333
for arg in cn.getElementsByTagName("arg"):
1334
if (arg.getAttribute("direction")
1335
== "out"):
1336
arg.setAttribute("name",
1337
"xml_data")
1338
xmlstring = document.toxml("utf-8")
1339
document.unlink()
1340
except (AttributeError, xml.dom.DOMException,
1341
xml.parsers.expat.ExpatError) as error:
1342
logger.error("Failed to override Introspection method",
1343
exc_info=error)
1344
return xmlstring
1345
1346
1347
class DBusObjectWithProperties(DBusObjectWithAnnotations):
620
1348
"""A D-Bus object with properties.
621
1349
622
1350
Classes inheriting from this can use the dbus_service_property
623
1351
decorator to expose methods as D-Bus properties. It exposes the
624
1352
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
1353
"""
626
627
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
630
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
633
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
638
1354
639
1355
def _get_dbus_property(self, interface_name, property_name):
640
1356
"""Returns a bound method if one exists which is a D-Bus
641
1357
property with the specified name and interface.
642
1358
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
1359
for cls in self.__class__.__mro__:
1360
for name, value in inspect.getmembers(
1361
cls, self._is_dbus_thing("property")):
646
1362
if (value._dbus_name == property_name
647
1363
and value._dbus_interface == interface_name):
648
1364
return value.__get__(self)
649
1365
650
1366
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
654
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1367
raise DBusPropertyNotFound("{}:{}.{}".format(
1368
self.dbus_object_path, interface_name, property_name))
1369
1370
@classmethod
1371
def _get_all_interface_names(cls):
1372
"""Get a sequence of all interfaces supported by an object"""
1373
return (name for name in set(getattr(getattr(x, attr),
1374
"_dbus_interface", None)
1375
for x in (inspect.getmro(cls))
1376
for attr in dir(x))
1377
if name is not None)
1378
1379
@dbus.service.method(dbus.PROPERTIES_IFACE,
1380
in_signature="ss",
656
1381
out_signature="v")
657
1382
def Get(self, interface_name, property_name):
658
1383
"""Standard D-Bus property Get() method, see D-Bus standard.
664
1389
if not hasattr(value, "variant_level"):
665
1390
return value
666
1391
return type(value)(value, variant_level=value.variant_level+1)
667
1392
668
1393
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
669
1394
def Set(self, interface_name, property_name, value):
670
1395
"""Standard D-Bus property Set() method, see D-Bus standard.
676
1401
# The byte_arrays option is not supported yet on
677
1402
# signatures other than "ay".
678
1403
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
1404
raise ValueError("Byte arrays not supported for non-"
1405
"'ay' signature {!r}"
1406
.format(prop._dbus_signature))
1407
value = dbus.ByteArray(b''.join(chr(byte)
1408
for byte in value))
682
1409
prop(value)
683
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1410
1411
@dbus.service.method(dbus.PROPERTIES_IFACE,
1412
in_signature="s",
685
1413
out_signature="a{sv}")
686
1414
def GetAll(self, interface_name):
687
1415
"""Standard D-Bus property GetAll() method, see D-Bus
688
1416
standard.
689
1417
690
1418
Note: Will not include properties with access="write".
691
1419
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
1420
properties = {}
1421
for name, prop in self._get_all_dbus_things("property"):
694
1422
if (interface_name
695
1423
and interface_name != prop._dbus_interface):
696
1424
# Interface non-empty but did not match
700
1428
continue
701
1429
value = prop()
702
1430
if not hasattr(value, "variant_level"):
703
all[name] = value
1431
properties[name] = value
704
1432
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
708
1433
properties[name] = type(value)(
1434
value, variant_level=value.variant_level + 1)
1435
return dbus.Dictionary(properties, signature="sv")
1436
1437
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1438
def PropertiesChanged(self, interface_name, changed_properties,
1439
invalidated_properties):
1440
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1441
standard.
1442
"""
1443
pass
1444
709
1445
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
1446
out_signature="s",
711
1447
path_keyword='object_path',
712
1448
connection_keyword='connection')
713
1449
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
1450
"""Overloading of standard D-Bus method.
1451
1452
Inserts property tags and interface annotation tags.
715
1453
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
1454
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1455
object_path,
1456
connection)
718
1457
try:
719
1458
document = xml.dom.minidom.parseString(xmlstring)
1459
720
1460
def make_tag(document, name, prop):
721
1461
e = document.createElement("property")
722
1462
e.setAttribute("name", name)
723
1463
e.setAttribute("type", prop._dbus_signature)
724
1464
e.setAttribute("access", prop._dbus_access)
725
1465
return e
1466
726
1467
for if_tag in document.getElementsByTagName("interface"):
1468
# Add property tags
727
1469
for tag in (make_tag(document, name, prop)
728
1470
for name, prop
729
in self._get_all_dbus_properties()
1471
in self._get_all_dbus_things("property")
730
1472
if prop._dbus_interface
731
1473
== if_tag.getAttribute("name")):
732
1474
if_tag.appendChild(tag)
1475
# Add annotation tags for properties
1476
for tag in if_tag.getElementsByTagName("property"):
1477
annots = dict()
1478
for name, prop in self._get_all_dbus_things(
1479
"property"):
1480
if (name == tag.getAttribute("name")
1481
and prop._dbus_interface
1482
== if_tag.getAttribute("name")):
1483
annots.update(getattr(
1484
prop, "_dbus_annotations", {}))
1485
for name, value in annots.items():
1486
ann_tag = document.createElement(
1487
"annotation")
1488
ann_tag.setAttribute("name", name)
1489
ann_tag.setAttribute("value", value)
1490
tag.appendChild(ann_tag)
733
1491
# Add the names to the return values for the
734
1492
# "org.freedesktop.DBus.Properties" methods
735
1493
if (if_tag.getAttribute("name")
750
1508
except (AttributeError, xml.dom.DOMException,
751
1509
xml.parsers.expat.ExpatError) as error:
752
1510
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
def datetime_to_dbus (dt, variant_level=0):
1511
exc_info=error)
1512
return xmlstring
1513
1514
1515
try:
1516
dbus.OBJECT_MANAGER_IFACE
1517
except AttributeError:
1518
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1519
1520
1521
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1522
"""A D-Bus object with an ObjectManager.
1523
1524
Classes inheriting from this exposes the standard
1525
GetManagedObjects call and the InterfacesAdded and
1526
InterfacesRemoved signals on the standard
1527
"org.freedesktop.DBus.ObjectManager" interface.
1528
1529
Note: No signals are sent automatically; they must be sent
1530
manually.
1531
"""
1532
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1533
out_signature="a{oa{sa{sv}}}")
1534
def GetManagedObjects(self):
1535
"""This function must be overridden"""
1536
raise NotImplementedError()
1537
1538
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1539
signature="oa{sa{sv}}")
1540
def InterfacesAdded(self, object_path, interfaces_and_properties):
1541
pass
1542
1543
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1544
def InterfacesRemoved(self, object_path, interfaces):
1545
pass
1546
1547
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1548
out_signature="s",
1549
path_keyword='object_path',
1550
connection_keyword='connection')
1551
def Introspect(self, object_path, connection):
1552
"""Overloading of standard D-Bus method.
1553
1554
Override return argument name of GetManagedObjects to be
1555
"objpath_interfaces_and_properties"
1556
"""
1557
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1558
object_path,
1559
connection)
1560
try:
1561
document = xml.dom.minidom.parseString(xmlstring)
1562
1563
for if_tag in document.getElementsByTagName("interface"):
1564
# Fix argument name for the GetManagedObjects method
1565
if (if_tag.getAttribute("name")
1566
== dbus.OBJECT_MANAGER_IFACE):
1567
for cn in if_tag.getElementsByTagName("method"):
1568
if (cn.getAttribute("name")
1569
== "GetManagedObjects"):
1570
for arg in cn.getElementsByTagName("arg"):
1571
if (arg.getAttribute("direction")
1572
== "out"):
1573
arg.setAttribute(
1574
"name",
1575
"objpath_interfaces"
1576
"_and_properties")
1577
xmlstring = document.toxml("utf-8")
1578
document.unlink()
1579
except (AttributeError, xml.dom.DOMException,
1580
xml.parsers.expat.ExpatError) as error:
1581
logger.error("Failed to override Introspection method",
1582
exc_info=error)
1583
return xmlstring
1584
1585
1586
def datetime_to_dbus(dt, variant_level=0):
758
1587
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1588
if dt is None:
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1589
return dbus.String("", variant_level=variant_level)
1590
return dbus.String(dt.isoformat(), variant_level=variant_level)
1591
1592
1593
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1594
"""A class decorator; applied to a subclass of
1595
dbus.service.Object, it will add alternate D-Bus attributes with
1596
interface names according to the "alt_interface_names" mapping.
1597
Usage:
1598
1599
@alternate_dbus_interfaces({"org.example.Interface":
1600
"net.example.AlternateInterface"})
1601
class SampleDBusObject(dbus.service.Object):
1602
@dbus.service.method("org.example.Interface")
1603
def SampleDBusMethod():
1604
pass
1605
1606
The above "SampleDBusMethod" on "SampleDBusObject" will be
1607
reachable via two interfaces: "org.example.Interface" and
1608
"net.example.AlternateInterface", the latter of which will have
1609
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1610
"true", unless "deprecate" is passed with a False value.
1611
1612
This works for methods and signals, and also for D-Bus properties
1613
(from DBusObjectWithProperties) and interfaces (from the
1614
dbus_interface_annotations decorator).
768
1615
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1616
1617
def wrapper(cls):
1618
for orig_interface_name, alt_interface_name in (
1619
alt_interface_names.items()):
1620
attr = {}
1621
interface_names = set()
1622
# Go though all attributes of the class
1623
for attrname, attribute in inspect.getmembers(cls):
776
1624
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1625
# with the wrong interface name
778
1626
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1627
or not attribute._dbus_interface.startswith(
1628
orig_interface_name)):
781
1629
continue
782
1630
# Create an alternate D-Bus interface name based on
783
1631
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1632
alt_interface = attribute._dbus_interface.replace(
1633
orig_interface_name, alt_interface_name)
1634
interface_names.add(alt_interface)
787
1635
# Is this a D-Bus signal?
788
1636
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
nonmethod_func = (dict(
1637
# Extract the original non-method undecorated
1638
# function by black magic
1639
if sys.version_info.major == 2:
1640
nonmethod_func = (dict(
792
1641
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1642
attribute.__closure__))
1643
["func"].cell_contents)
1644
else:
1645
nonmethod_func = (dict(
1646
zip(attribute.__code__.co_freevars,
1647
attribute.__closure__))
1648
["func"].cell_contents)
795
1649
# Create a new, but exactly alike, function
796
1650
# object, and decorate it to be a new D-Bus signal
797
1651
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
1652
new_function = copy_function(nonmethod_func)
1653
new_function = (dbus.service.signal(
1654
alt_interface,
1655
attribute._dbus_signature)(new_function))
1656
# Copy annotations, if any
1657
try:
1658
new_function._dbus_annotations = dict(
1659
attribute._dbus_annotations)
1660
except AttributeError:
1661
pass
1662
807
1663
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1664
# original and alternate functions, so both the
1665
# original and alternate signals gets sent when
1666
# the function is called
810
1667
def fixscope(func1, func2):
811
1668
"""This function is a scope container to pass
812
1669
func1 and func2 to the "call_both" function
813
1670
outside of its arguments"""
1671
1672
@functools.wraps(func2)
814
1673
def call_both(*args, **kwargs):
815
1674
"""This function will emit two D-Bus
816
1675
signals by calling func1 and func2"""
817
1676
func1(*args, **kwargs)
818
1677
func2(*args, **kwargs)
1678
# Make wrapper function look like a D-Bus
1679
# signal
1680
for name, attr in inspect.getmembers(func2):
1681
if name.startswith("_dbus_"):
1682
setattr(call_both, name, attr)
1683
819
1684
return call_both
820
1685
# Create the "call_both" function and add it to
821
1686
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1687
attr[attrname] = fixscope(attribute, new_function)
824
1688
# Is this a D-Bus method?
825
1689
elif getattr(attribute, "_dbus_is_method", False):
826
1690
# Create a new, but exactly alike, function
827
1691
# object. Decorate it to be a new D-Bus method
828
1692
# with the alternate D-Bus interface name. Add it
829
1693
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
attribute.func_closure)))
1694
attr[attrname] = (
1695
dbus.service.method(
1696
alt_interface,
1697
attribute._dbus_in_signature,
1698
attribute._dbus_out_signature)
1699
(copy_function(attribute)))
1700
# Copy annotations, if any
1701
try:
1702
attr[attrname]._dbus_annotations = dict(
1703
attribute._dbus_annotations)
1704
except AttributeError:
1705
pass
840
1706
# Is this a D-Bus property?
841
1707
elif getattr(attribute, "_dbus_is_property", False):
842
1708
# Create a new, but exactly alike, function
843
1709
# object, and decorate it to be a new D-Bus
844
1710
# property with the alternate D-Bus interface
845
1711
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
1712
attr[attrname] = (dbus_service_property(
1713
alt_interface, attribute._dbus_signature,
1714
attribute._dbus_access,
1715
attribute._dbus_get_args_options
1716
["byte_arrays"])
1717
(copy_function(attribute)))
1718
# Copy annotations, if any
1719
try:
1720
attr[attrname]._dbus_annotations = dict(
1721
attribute._dbus_annotations)
1722
except AttributeError:
1723
pass
1724
# Is this a D-Bus interface?
1725
elif getattr(attribute, "_dbus_is_interface", False):
1726
# Create a new, but exactly alike, function
1727
# object. Decorate it to be a new D-Bus interface
1728
# with the alternate D-Bus interface name. Add it
1729
# to the class.
1730
attr[attrname] = (
1731
dbus_interface_annotations(alt_interface)
1732
(copy_function(attribute)))
1733
if deprecate:
1734
# Deprecate all alternate interfaces
1735
iname = "_AlternateDBusNames_interface_annotation{}"
1736
for interface_name in interface_names:
1737
1738
@dbus_interface_annotations(interface_name)
1739
def func(self):
1740
return {"org.freedesktop.DBus.Deprecated":
1741
"true"}
1742
# Find an unused name
1743
for aname in (iname.format(i)
1744
for i in itertools.count()):
1745
if aname not in attr:
1746
attr[aname] = func
1747
break
1748
if interface_names:
1749
# Replace the class with a new subclass of it with
1750
# methods, signals, etc. as created above.
1751
if sys.version_info.major == 2:
1752
cls = type(b"{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
else:
1755
cls = type("{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
return cls
1758
1759
return wrapper
1760
1761
1762
@alternate_dbus_interfaces({"se.recompile.Mandos":
1763
"se.bsnet.fukt.Mandos"})
861
1764
class ClientDBus(Client, DBusObjectWithProperties):
862
1765
"""A Client class using D-Bus
863
1766
864
1767
Attributes:
865
1768
dbus_object_path: dbus.ObjectPath
866
1769
bus: dbus.SystemBus()
867
1770
"""
868
1771
869
1772
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
871
1773
+ ("dbus_object_path", ))
1774
1775
_interface = "se.recompile.Mandos.Client"
1776
872
1777
# dbus.service.Object doesn't use super(), so we can't either.
873
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1778
1779
def __init__(self, bus=None, *args, **kwargs):
876
1780
self.bus = bus
877
1781
Client.__init__(self, *args, **kwargs)
878
1782
# Only now, when this client is initialized, can it show up on
879
1783
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1784
client_object_name = str(self.name).translate(
881
1785
{ord("."): ord("_"),
882
1786
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1787
self.dbus_object_path = dbus.ObjectPath(
1788
"/clients/" + client_object_name)
885
1789
DBusObjectWithProperties.__init__(self, self.bus,
886
1790
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
variant_level=1):
1791
1792
def notifychangeproperty(transform_func, dbus_name,
1793
type_func=lambda x: x,
1794
variant_level=1,
1795
invalidate_only=False,
1796
_interface=_interface):
891
1797
""" Modify a variable so that it's a property which announces
892
1798
its changes to DBus.
893
1799
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1800
transform_fun: Function that takes a value and a variant_level
1801
and transforms it to a D-Bus type.
896
1802
dbus_name: D-Bus name of the variable
897
1803
type_func: Function that transform the value before sending it
898
1804
to the D-Bus. Default: no transform
899
1805
variant_level: D-Bus variant level. Default: 1
900
1806
"""
901
attrname = "_{0}".format(dbus_name)
1807
attrname = "_{}".format(dbus_name)
1808
902
1809
def setter(self, value):
903
1810
if hasattr(self, "dbus_object_path"):
904
1811
if (not hasattr(self, attrname) or
905
1812
type_func(getattr(self, attrname, None))
906
1813
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
dbus_value)
1814
if invalidate_only:
1815
self.PropertiesChanged(
1816
_interface, dbus.Dictionary(),
1817
dbus.Array((dbus_name, )))
1818
else:
1819
dbus_value = transform_func(
1820
type_func(value),
1821
variant_level=variant_level)
1822
self.PropertyChanged(dbus.String(dbus_name),
1823
dbus_value)
1824
self.PropertiesChanged(
1825
_interface,
1826
dbus.Dictionary({dbus.String(dbus_name):
1827
dbus_value}),
1828
dbus.Array())
911
1829
setattr(self, attrname, value)
912
1830
913
1831
return property(lambda self: getattr(self, attrname), setter)
914
915
1832
916
1833
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1834
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1835
"ApprovalPending",
919
type_func = bool)
1836
type_func=bool)
920
1837
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1838
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1839
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1840
checker = notifychangeproperty(
1841
dbus.Boolean, "CheckerRunning",
1842
type_func=lambda checker: checker is not None)
926
1843
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1844
"LastCheckedOK")
1845
last_checker_status = notifychangeproperty(dbus.Int16,
1846
"LastCheckerStatus")
928
1847
last_approval_request = notifychangeproperty(
929
1848
datetime_to_dbus, "LastApprovalRequest")
930
1849
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1850
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1851
approval_delay = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDelay",
1853
type_func=lambda td: td.total_seconds() * 1000)
936
1854
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1855
dbus.UInt64, "ApprovalDuration",
1856
type_func=lambda td: td.total_seconds() * 1000)
939
1857
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1858
timeout = notifychangeproperty(
1859
dbus.UInt64, "Timeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
943
1861
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
1862
dbus.UInt64, "ExtendedTimeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
interval = notifychangeproperty(
1865
dbus.UInt64, "Interval",
1866
type_func=lambda td: td.total_seconds() * 1000)
950
1867
checker_command = notifychangeproperty(dbus.String, "Checker")
951
1868
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1869
invalidate_only=True)
1870
952
1871
del notifychangeproperty
953
1872
954
1873
def __del__(self, *args, **kwargs):
955
1874
try:
956
1875
self.remove_from_connection()
959
1878
if hasattr(DBusObjectWithProperties, "__del__"):
960
1879
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1880
Client.__del__(self, *args, **kwargs)
962
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
exitstatus = os.WEXITSTATUS(condition)
1881
1882
def checker_callback(self, source, condition,
1883
connection, command, *args, **kwargs):
1884
ret = Client.checker_callback(self, source, condition,
1885
connection, command, *args,
1886
**kwargs)
1887
exitstatus = self.last_checker_status
1888
if exitstatus >= 0:
969
1889
# Emit D-Bus signal
970
1890
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1891
# This is specific to GNU libC
1892
dbus.Int64(exitstatus << 8),
972
1893
dbus.String(command))
973
1894
else:
974
1895
# Emit D-Bus signal
975
1896
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1897
dbus.Int64(
1898
# This is specific to GNU libC
1899
(exitstatus << 8)
1900
| self.last_checker_signal),
977
1901
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
981
1902
return ret
1903
982
1904
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1905
old_checker_pid = getattr(self.checker, "pid", None)
988
1906
r = Client.start_checker(self, *args, **kwargs)
989
1907
# Only if new checker process was started
990
1908
if (self.checker is not None
992
1910
# Emit D-Bus signal
993
1911
self.CheckerStarted(self.current_checker_command)
994
1912
return r
995
1913
996
1914
def _reset_approved(self):
997
self._approved = None
1915
self.approved = None
998
1916
return False
999
1917
1000
1918
def approve(self, value=True):
1919
self.approved = value
1920
GLib.timeout_add(int(self.approval_duration.total_seconds()
1921
* 1000), self._reset_approved)
1001
1922
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1008
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1010
1011
## Signals
1012
1923
1924
# D-Bus methods, signals & properties
1925
1926
# Interfaces
1927
1928
# Signals
1929
1013
1930
# CheckerCompleted - signal
1014
1931
@dbus.service.signal(_interface, signature="nxs")
1015
1932
def CheckerCompleted(self, exitcode, waitstatus, command):
1016
1933
"D-Bus signal"
1017
1934
pass
1018
1935
1019
1936
# CheckerStarted - signal
1020
1937
@dbus.service.signal(_interface, signature="s")
1021
1938
def CheckerStarted(self, command):
1022
1939
"D-Bus signal"
1023
1940
pass
1024
1941
1025
1942
# PropertyChanged - signal
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1944
@dbus.service.signal(_interface, signature="sv")
1027
1945
def PropertyChanged(self, property, value):
1028
1946
"D-Bus signal"
1029
1947
pass
1030
1948
1031
1949
# GotSecret - signal
1032
1950
@dbus.service.signal(_interface)
1033
1951
def GotSecret(self):
1036
1954
server to mandos-client
1037
1955
"""
1038
1956
pass
1039
1957
1040
1958
# Rejected - signal
1041
1959
@dbus.service.signal(_interface, signature="s")
1042
1960
def Rejected(self, reason):
1043
1961
"D-Bus signal"
1044
1962
pass
1045
1963
1046
1964
# NeedApproval - signal
1047
1965
@dbus.service.signal(_interface, signature="tb")
1048
1966
def NeedApproval(self, timeout, default):
1049
1967
"D-Bus signal"
1050
1968
return self.need_approval()
1051
1052
## Methods
1053
1969
1970
# Methods
1971
1054
1972
# Approve - method
1055
1973
@dbus.service.method(_interface, in_signature="b")
1056
1974
def Approve(self, value):
1057
1975
self.approve(value)
1058
1976
1059
1977
# CheckedOK - method
1060
1978
@dbus.service.method(_interface)
1061
1979
def CheckedOK(self):
1062
1980
self.checked_ok()
1063
1981
1064
1982
# Enable - method
1983
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1065
1984
@dbus.service.method(_interface)
1066
1985
def Enable(self):
1067
1986
"D-Bus method"
1068
1987
self.enable()
1069
1988
1070
1989
# StartChecker - method
1990
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1071
1991
@dbus.service.method(_interface)
1072
1992
def StartChecker(self):
1073
1993
"D-Bus method"
1074
1994
self.start_checker()
1075
1995
1076
1996
# Disable - method
1997
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1077
1998
@dbus.service.method(_interface)
1078
1999
def Disable(self):
1079
2000
"D-Bus method"
1080
2001
self.disable()
1081
2002
1082
2003
# StopChecker - method
2004
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1083
2005
@dbus.service.method(_interface)
1084
2006
def StopChecker(self):
1085
2007
self.stop_checker()
1086
1087
## Properties
1088
2008
2009
# Properties
2010
1089
2011
# ApprovalPending - property
1090
2012
@dbus_service_property(_interface, signature="b", access="read")
1091
2013
def ApprovalPending_dbus_property(self):
1092
2014
return dbus.Boolean(bool(self.approvals_pending))
1093
2015
1094
2016
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
2017
@dbus_service_property(_interface,
2018
signature="b",
1096
2019
access="readwrite")
1097
2020
def ApprovedByDefault_dbus_property(self, value=None):
1098
2021
if value is None: # get
1099
2022
return dbus.Boolean(self.approved_by_default)
1100
2023
self.approved_by_default = bool(value)
1101
2024
1102
2025
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
2026
@dbus_service_property(_interface,
2027
signature="t",
1104
2028
access="readwrite")
1105
2029
def ApprovalDelay_dbus_property(self, value=None):
1106
2030
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
2031
return dbus.UInt64(self.approval_delay.total_seconds()
2032
* 1000)
1108
2033
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
2034
1110
2035
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
2036
@dbus_service_property(_interface,
2037
signature="t",
1112
2038
access="readwrite")
1113
2039
def ApprovalDuration_dbus_property(self, value=None):
1114
2040
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
2041
return dbus.UInt64(self.approval_duration.total_seconds()
2042
* 1000)
1117
2043
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
2044
1119
2045
# Name - property
2046
@dbus_annotations(
2047
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1120
2048
@dbus_service_property(_interface, signature="s", access="read")
1121
2049
def Name_dbus_property(self):
1122
2050
return dbus.String(self.name)
1123
2051
2052
# KeyID - property
2053
@dbus_annotations(
2054
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2055
@dbus_service_property(_interface, signature="s", access="read")
2056
def KeyID_dbus_property(self):
2057
return dbus.String(self.key_id)
2058
1124
2059
# Fingerprint - property
2060
@dbus_annotations(
2061
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1125
2062
@dbus_service_property(_interface, signature="s", access="read")
1126
2063
def Fingerprint_dbus_property(self):
1127
2064
return dbus.String(self.fingerprint)
1128
2065
1129
2066
# Host - property
1130
@dbus_service_property(_interface, signature="s",
2067
@dbus_service_property(_interface,
2068
signature="s",
1131
2069
access="readwrite")
1132
2070
def Host_dbus_property(self, value=None):
1133
2071
if value is None: # get
1134
2072
return dbus.String(self.host)
1135
self.host = value
1136
2073
self.host = str(value)
2074
1137
2075
# Created - property
2076
@dbus_annotations(
2077
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1138
2078
@dbus_service_property(_interface, signature="s", access="read")
1139
2079
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1141
2080
return datetime_to_dbus(self.created)
2081
1142
2082
# LastEnabled - property
1143
2083
@dbus_service_property(_interface, signature="s", access="read")
1144
2084
def LastEnabled_dbus_property(self):
1145
2085
return datetime_to_dbus(self.last_enabled)
1146
2086
1147
2087
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
2088
@dbus_service_property(_interface,
2089
signature="b",
1149
2090
access="readwrite")
1150
2091
def Enabled_dbus_property(self, value=None):
1151
2092
if value is None: # get
1154
2095
self.enable()
1155
2096
else:
1156
2097
self.disable()
1157
2098
1158
2099
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
2100
@dbus_service_property(_interface,
2101
signature="s",
1160
2102
access="readwrite")
1161
2103
def LastCheckedOK_dbus_property(self, value=None):
1162
2104
if value is not None:
1163
2105
self.checked_ok()
1164
2106
return
1165
2107
return datetime_to_dbus(self.last_checked_ok)
1166
2108
2109
# LastCheckerStatus - property
2110
@dbus_service_property(_interface, signature="n", access="read")
2111
def LastCheckerStatus_dbus_property(self):
2112
return dbus.Int16(self.last_checker_status)
2113
1167
2114
# Expires - property
1168
2115
@dbus_service_property(_interface, signature="s", access="read")
1169
2116
def Expires_dbus_property(self):
1170
2117
return datetime_to_dbus(self.expires)
1171
2118
1172
2119
# LastApprovalRequest - property
1173
2120
@dbus_service_property(_interface, signature="s", access="read")
1174
2121
def LastApprovalRequest_dbus_property(self):
1175
2122
return datetime_to_dbus(self.last_approval_request)
1176
2123
1177
2124
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
2125
@dbus_service_property(_interface,
2126
signature="t",
1179
2127
access="readwrite")
1180
2128
def Timeout_dbus_property(self, value=None):
1181
2129
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
2130
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2131
old_timeout = self.timeout
1183
2132
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1205
2133
# Reschedule disabling
2134
if self.enabled:
2135
now = datetime.datetime.utcnow()
2136
self.expires += self.timeout - old_timeout
2137
if self.expires <= now:
2138
# The timeout has passed
2139
self.disable()
2140
else:
2141
if (getattr(self, "disable_initiator_tag", None)
2142
is None):
2143
return
2144
GLib.source_remove(self.disable_initiator_tag)
2145
self.disable_initiator_tag = GLib.timeout_add(
2146
int((self.expires - now).total_seconds() * 1000),
2147
self.disable)
2148
1206
2149
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
2150
@dbus_service_property(_interface,
2151
signature="t",
1208
2152
access="readwrite")
1209
2153
def ExtendedTimeout_dbus_property(self, value=None):
1210
2154
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
2155
return dbus.UInt64(self.extended_timeout.total_seconds()
2156
* 1000)
1212
2157
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
2158
1214
2159
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
2160
@dbus_service_property(_interface,
2161
signature="t",
1216
2162
access="readwrite")
1217
2163
def Interval_dbus_property(self, value=None):
1218
2164
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
2165
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
2166
self.interval = datetime.timedelta(0, 0, 0, value)
1221
2167
if getattr(self, "checker_initiator_tag", None) is None:
1222
2168
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1228
2169
if self.enabled:
2170
# Reschedule checker run
2171
GLib.source_remove(self.checker_initiator_tag)
2172
self.checker_initiator_tag = GLib.timeout_add(
2173
value, self.start_checker)
2174
self.start_checker() # Start one now, too
2175
1229
2176
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
2177
@dbus_service_property(_interface,
2178
signature="s",
1231
2179
access="readwrite")
1232
2180
def Checker_dbus_property(self, value=None):
1233
2181
if value is None: # get
1234
2182
return dbus.String(self.checker_command)
1235
self.checker_command = value
1236
2183
self.checker_command = str(value)
2184
1237
2185
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
2186
@dbus_service_property(_interface,
2187
signature="b",
1239
2188
access="readwrite")
1240
2189
def CheckerRunning_dbus_property(self, value=None):
1241
2190
if value is None: # get
1244
2193
self.start_checker()
1245
2194
else:
1246
2195
self.stop_checker()
1247
2196
1248
2197
# ObjectPath - property
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2200
"org.freedesktop.DBus.Deprecated": "true"})
1249
2201
@dbus_service_property(_interface, signature="o", access="read")
1250
2202
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
1252
2203
return self.dbus_object_path # is already a dbus.ObjectPath
2204
1253
2205
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2206
@dbus_annotations(
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2208
"invalidates"})
2209
@dbus_service_property(_interface,
2210
signature="ay",
2211
access="write",
2212
byte_arrays=True)
1256
2213
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
1258
2214
self.secret = bytes(value)
2215
1259
2216
del _interface
1260
2217
1261
2218
1262
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
2219
class ProxyClient:
2220
def __init__(self, child_pipe, key_id, fpr, address):
1264
2221
self._pipe = child_pipe
1265
self._pipe.send(('init', fpr, address))
2222
self._pipe.send(('init', key_id, fpr, address))
1266
2223
if not self._pipe.recv():
1267
raise KeyError()
1268
2224
raise KeyError(key_id or fpr)
2225
1269
2226
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2227
if name == '_pipe':
1271
2228
return super(ProxyClient, self).__getattribute__(name)
1272
2229
self._pipe.send(('getattr', name))
1273
2230
data = self._pipe.recv()
1274
2231
if data[0] == 'data':
1275
2232
return data[1]
1276
2233
if data[0] == 'function':
2234
1277
2235
def func(*args, **kwargs):
1278
2236
self._pipe.send(('funcall', name, args, kwargs))
1279
2237
return self._pipe.recv()[1]
2238
1280
2239
return func
1281
2240
1282
2241
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2242
if name == '_pipe':
1284
2243
return super(ProxyClient, self).__setattr__(name, value)
1285
2244
self._pipe.send(('setattr', name, value))
1286
2245
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
2246
1290
2247
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2248
"""A class to handle client connections.
1292
2249
1293
2250
Instantiated once for each connection to handle it.
1294
2251
Note: This will run in its own forked process."""
1295
2252
1296
2253
def handle(self):
1297
2254
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2255
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2256
str(self.client_address))
1300
2257
logger.debug("Pipe FD: %d",
1301
2258
self.server.child_pipe.fileno())
1302
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1307
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
1312
1313
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
# "+AES-256-CBC", "+SHA1",
1315
# "+COMP-NULL", "+CTYPE-OPENPGP",
1316
# "+DHE-DSS"))
2259
2260
session = gnutls.ClientSession(self.request)
2261
2262
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2263
# "+AES-256-CBC", "+SHA1",
2264
# "+COMP-NULL", "+CTYPE-OPENPGP",
2265
# "+DHE-DSS"))
1317
2266
# Use a fallback default, since this MUST be set.
1318
2267
priority = self.server.gnutls_priority
1319
2268
if priority is None:
1320
2269
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1324
2270
gnutls.priority_set_direct(session._c_object,
2271
priority.encode("utf-8"),
2272
None)
2273
1325
2274
# Start communication using the Mandos protocol
1326
2275
# Get protocol number
1327
2276
line = self.request.makefile().readline()
1328
2277
logger.debug("Protocol version: %r", line)
1329
2278
try:
1330
2279
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
2280
raise RuntimeError(line)
1332
2281
except (ValueError, IndexError, RuntimeError) as error:
1333
2282
logger.error("Unknown protocol version: %s", error)
1334
2283
return
1335
2284
1336
2285
# Start GnuTLS connection
1337
2286
try:
1338
2287
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2288
except gnutls.Error as error:
1340
2289
logger.warning("Handshake failed: %s", error)
1341
2290
# Do not run session.bye() here: the session is not
1342
2291
# established. Just abandon the request.
1343
2292
return
1344
2293
logger.debug("Handshake succeeded")
1345
2294
1346
2295
approval_required = False
1347
2296
try:
1348
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1351
except (TypeError,
1352
gnutls.errors.GNUTLSError) as error:
1353
logger.warning("Bad certificate: %s", error)
1354
return
1355
logger.debug("Fingerprint: %s", fpr)
1356
1357
try:
1358
client = ProxyClient(child_pipe, fpr,
2297
if gnutls.has_rawpk:
2298
fpr = b""
2299
try:
2300
key_id = self.key_id(
2301
self.peer_certificate(session))
2302
except (TypeError, gnutls.Error) as error:
2303
logger.warning("Bad certificate: %s", error)
2304
return
2305
logger.debug("Key ID: %s", key_id)
2306
2307
else:
2308
key_id = b""
2309
try:
2310
fpr = self.fingerprint(
2311
self.peer_certificate(session))
2312
except (TypeError, gnutls.Error) as error:
2313
logger.warning("Bad certificate: %s", error)
2314
return
2315
logger.debug("Fingerprint: %s", fpr)
2316
2317
try:
2318
client = ProxyClient(child_pipe, key_id, fpr,
1359
2319
self.client_address)
1360
2320
except KeyError:
1361
2321
return
1362
2322
1363
2323
if client.approval_delay:
1364
2324
delay = client.approval_delay
1365
2325
client.approvals_pending += 1
1366
2326
approval_required = True
1367
2327
1368
2328
while True:
1369
2329
if not client.enabled:
1370
2330
logger.info("Client %s is disabled",
1371
client.name)
2331
client.name)
1372
2332
if self.server.use_dbus:
1373
2333
# Emit D-Bus signal
1374
2334
client.Rejected("Disabled")
1375
2335
return
1376
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2336
2337
if client.approved or not client.approval_delay:
2338
# We are approved or approval is disabled
1379
2339
break
1380
elif client._approved is None:
2340
elif client.approved is None:
1381
2341
logger.info("Client %s needs approval",
1382
2342
client.name)
1383
2343
if self.server.use_dbus:
1384
2344
# Emit D-Bus signal
1385
2345
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2346
client.approval_delay.total_seconds()
2347
* 1000, client.approved_by_default)
1388
2348
else:
1389
2349
logger.warning("Client %s was not approved",
1390
2350
client.name)
1392
2352
# Emit D-Bus signal
1393
2353
client.Rejected("Denied")
1394
2354
return
1395
1396
#wait until timeout or approved
1397
#x = float(client
1398
# ._timedelta_to_milliseconds(delay))
2355
2356
# wait until timeout or approved
1399
2357
time = datetime.datetime.now()
1400
2358
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2359
client.changedstate.wait(delay.total_seconds())
1404
2360
client.changedstate.release()
1405
2361
time2 = datetime.datetime.now()
1406
2362
if (time2 - time) >= delay:
1416
2372
break
1417
2373
else:
1418
2374
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
2375
2376
try:
2377
session.send(client.secret)
2378
except gnutls.Error as error:
2379
logger.warning("gnutls send failed",
2380
exc_info=error)
2381
return
2382
1432
2383
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
2384
# bump the timeout using extended_timeout
2385
client.bump_timeout(client.extended_timeout)
1435
2386
if self.server.use_dbus:
1436
2387
# Emit D-Bus signal
1437
2388
client.GotSecret()
1438
2389
1439
2390
finally:
1440
2391
if approval_required:
1441
2392
client.approvals_pending -= 1
1442
2393
try:
1443
2394
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2395
except gnutls.Error as error:
2396
logger.warning("GnuTLS bye failed",
2397
exc_info=error)
2398
1447
2399
@staticmethod
1448
2400
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
2401
"Return the peer's certificate as a bytestring"
2402
try:
2403
cert_type = gnutls.certificate_type_get2(session._c_object,
2404
gnutls.CTYPE_PEERS)
2405
except AttributeError:
2406
cert_type = gnutls.certificate_type_get(session._c_object)
2407
if gnutls.has_rawpk:
2408
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2409
else:
2410
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2411
# If not a valid certificate type...
2412
if cert_type not in valid_cert_types:
2413
logger.info("Cert type %r not in %r", cert_type,
2414
valid_cert_types)
2415
# ...return invalid data
2416
return b""
1456
2417
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2418
cert_list = (gnutls.certificate_get_peers
1459
2419
(session._c_object, ctypes.byref(list_size)))
1460
2420
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2421
raise gnutls.Error("error getting peer certificate")
1463
2422
if list_size.value == 0:
1464
2423
return None
1465
2424
cert = cert_list[0]
1466
2425
return ctypes.string_at(cert.data, cert.size)
1467
2426
2427
@staticmethod
2428
def key_id(certificate):
2429
"Convert a certificate bytestring to a hexdigit key ID"
2430
# New GnuTLS "datum" with the public key
2431
datum = gnutls.datum_t(
2432
ctypes.cast(ctypes.c_char_p(certificate),
2433
ctypes.POINTER(ctypes.c_ubyte)),
2434
ctypes.c_uint(len(certificate)))
2435
# XXX all these need to be created in the gnutls "module"
2436
# New empty GnuTLS certificate
2437
pubkey = gnutls.pubkey_t()
2438
gnutls.pubkey_init(ctypes.byref(pubkey))
2439
# Import the raw public key into the certificate
2440
gnutls.pubkey_import(pubkey,
2441
ctypes.byref(datum),
2442
gnutls.X509_FMT_DER)
2443
# New buffer for the key ID
2444
buf = ctypes.create_string_buffer(32)
2445
buf_len = ctypes.c_size_t(len(buf))
2446
# Get the key ID from the raw public key into the buffer
2447
gnutls.pubkey_get_key_id(pubkey,
2448
gnutls.KEYID_USE_SHA256,
2449
ctypes.cast(ctypes.byref(buf),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.byref(buf_len))
2452
# Deinit the certificate
2453
gnutls.pubkey_deinit(pubkey)
2454
2455
# Convert the buffer to a Python bytestring
2456
key_id = ctypes.string_at(buf, buf_len.value)
2457
# Convert the bytestring to hexadecimal notation
2458
hex_key_id = binascii.hexlify(key_id).upper()
2459
return hex_key_id
2460
1468
2461
@staticmethod
1469
2462
def fingerprint(openpgp):
1470
2463
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2464
# 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))))
2465
datum = gnutls.datum_t(
2466
ctypes.cast(ctypes.c_char_p(openpgp),
2467
ctypes.POINTER(ctypes.c_ubyte)),
2468
ctypes.c_uint(len(openpgp)))
1477
2469
# 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)))
2470
crt = gnutls.openpgp_crt_t()
2471
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2472
# 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))
2473
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2474
gnutls.OPENPGP_FMT_RAW)
1486
2475
# Verify the self signature in the key
1487
2476
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2477
gnutls.openpgp_crt_verify_self(crt, 0,
2478
ctypes.byref(crtverify))
1491
2479
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2480
gnutls.openpgp_crt_deinit(crt)
2481
raise gnutls.CertificateSecurityError(code
2482
=crtverify.value)
1495
2483
# New buffer for the fingerprint
1496
2484
buf = ctypes.create_string_buffer(20)
1497
2485
buf_len = ctypes.c_size_t()
1498
2486
# 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)))
2487
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2488
ctypes.byref(buf_len))
1502
2489
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2490
gnutls.openpgp_crt_deinit(crt)
1504
2491
# Convert the buffer to a Python bytestring
1505
2492
fpr = ctypes.string_at(buf, buf_len.value)
1506
2493
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2494
hex_fpr = binascii.hexlify(fpr).upper()
1508
2495
return hex_fpr
1509
2496
1510
2497
1511
class MultiprocessingMixIn(object):
2498
class MultiprocessingMixIn:
1512
2499
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2500
1513
2501
def sub_process_main(self, request, address):
1514
2502
try:
1515
2503
self.finish_request(request, address)
1516
except:
2504
except Exception:
1517
2505
self.handle_error(request, address)
1518
2506
self.close_request(request)
1519
2507
1520
2508
def process_request(self, request, address):
1521
2509
"""Start a new process to process the request."""
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
1524
1525
1526
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2510
proc = multiprocessing.Process(target=self.sub_process_main,
2511
args=(request, address))
2512
proc.start()
2513
return proc
2514
2515
2516
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1527
2517
""" adds a pipe to the MixIn """
2518
1528
2519
def process_request(self, request, client_address):
1529
2520
"""Overrides and wraps the original process_request().
1530
2521
1531
2522
This function creates a new pipe in self.pipe
1532
2523
"""
1533
2524
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1534
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
2525
2526
proc = MultiprocessingMixIn.process_request(self, request,
2527
client_address)
1537
2528
self.child_pipe.close()
1538
self.add_pipe(parent_pipe)
1539
1540
def add_pipe(self, parent_pipe):
2529
self.add_pipe(parent_pipe, proc)
2530
2531
def add_pipe(self, parent_pipe, proc):
1541
2532
"""Dummy function; override as necessary"""
1542
raise NotImplementedError
2533
raise NotImplementedError()
1543
2534
1544
2535
1545
2536
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1546
socketserver.TCPServer, object):
2537
socketserver.TCPServer):
1547
2538
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1548
2539
1549
2540
Attributes:
1550
2541
enabled: Boolean; whether this server is activated yet
1551
2542
interface: None or a network interface name (string)
1552
2543
use_ipv6: Boolean; to use IPv6 or not
1553
2544
"""
2545
1554
2546
def __init__(self, server_address, RequestHandlerClass,
1555
interface=None, use_ipv6=True):
2547
interface=None,
2548
use_ipv6=True,
2549
socketfd=None):
2550
"""If socketfd is set, use that file descriptor instead of
2551
creating a new one with socket.socket().
2552
"""
1556
2553
self.interface = interface
1557
2554
if use_ipv6:
1558
2555
self.address_family = socket.AF_INET6
2556
if socketfd is not None:
2557
# Save the file descriptor
2558
self.socketfd = socketfd
2559
# Save the original socket.socket() function
2560
self.socket_socket = socket.socket
2561
2562
# To implement --socket, we monkey patch socket.socket.
2563
#
2564
# (When socketserver.TCPServer is a new-style class, we
2565
# could make self.socket into a property instead of monkey
2566
# patching socket.socket.)
2567
#
2568
# Create a one-time-only replacement for socket.socket()
2569
@functools.wraps(socket.socket)
2570
def socket_wrapper(*args, **kwargs):
2571
# Restore original function so subsequent calls are
2572
# not affected.
2573
socket.socket = self.socket_socket
2574
del self.socket_socket
2575
# This time only, return a new socket object from the
2576
# saved file descriptor.
2577
return socket.fromfd(self.socketfd, *args, **kwargs)
2578
# Replace socket.socket() function with wrapper
2579
socket.socket = socket_wrapper
2580
# The socketserver.TCPServer.__init__ will call
2581
# socket.socket(), which might be our replacement,
2582
# socket_wrapper(), if socketfd was set.
1559
2583
socketserver.TCPServer.__init__(self, server_address,
1560
2584
RequestHandlerClass)
2585
1561
2586
def server_bind(self):
1562
2587
"""This overrides the normal server_bind() function
1563
2588
to bind to an interface if one was specified, and also NOT to
1564
2589
bind to an address or port if they were not specified."""
2590
global SO_BINDTODEVICE
1565
2591
if self.interface is not None:
1566
2592
if SO_BINDTODEVICE is None:
1567
logger.error("SO_BINDTODEVICE does not exist;"
1568
" cannot bind to interface %s",
1569
self.interface)
1570
else:
1571
try:
1572
self.socket.setsockopt(socket.SOL_SOCKET,
1573
SO_BINDTODEVICE,
1574
str(self.interface
1575
+ '\0'))
1576
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1580
self.interface)
1581
elif error[0] == errno.ENOPROTOOPT:
1582
logger.error("SO_BINDTODEVICE not available;"
1583
" cannot bind to interface %s",
1584
self.interface)
1585
else:
1586
raise
2593
# Fall back to a hard-coded value which seems to be
2594
# common enough.
2595
logger.warning("SO_BINDTODEVICE not found, trying 25")
2596
SO_BINDTODEVICE = 25
2597
try:
2598
self.socket.setsockopt(
2599
socket.SOL_SOCKET, SO_BINDTODEVICE,
2600
(self.interface + "\0").encode("utf-8"))
2601
except socket.error as error:
2602
if error.errno == errno.EPERM:
2603
logger.error("No permission to bind to"
2604
" interface %s", self.interface)
2605
elif error.errno == errno.ENOPROTOOPT:
2606
logger.error("SO_BINDTODEVICE not available;"
2607
" cannot bind to interface %s",
2608
self.interface)
2609
elif error.errno == errno.ENODEV:
2610
logger.error("Interface %s does not exist,"
2611
" cannot bind", self.interface)
2612
else:
2613
raise
1587
2614
# Only bind(2) the socket if we really need to.
1588
2615
if self.server_address[0] or self.server_address[1]:
2616
if self.server_address[1]:
2617
self.allow_reuse_address = True
1589
2618
if not self.server_address[0]:
1590
2619
if self.address_family == socket.AF_INET6:
1591
any_address = "::" # in6addr_any
2620
any_address = "::" # in6addr_any
1592
2621
else:
1593
any_address = socket.INADDR_ANY
2622
any_address = "0.0.0.0" # INADDR_ANY
1594
2623
self.server_address = (any_address,
1595
2624
self.server_address[1])
1596
2625
elif not self.server_address[1]:
1597
self.server_address = (self.server_address[0],
1598
0)
2626
self.server_address = (self.server_address[0], 0)
1599
2627
# if self.interface:
1600
2628
# self.server_address = (self.server_address[0],
1601
2629
# 0, # port
1607
2635
1608
2636
class MandosServer(IPv6_TCPServer):
1609
2637
"""Mandos server.
1610
2638
1611
2639
Attributes:
1612
2640
clients: set of Client objects
1613
2641
gnutls_priority GnuTLS priority string
1614
2642
use_dbus: Boolean; to emit D-Bus signals or not
1615
1616
Assumes a gobject.MainLoop event loop.
2643
2644
Assumes a GLib.MainLoop event loop.
1617
2645
"""
2646
1618
2647
def __init__(self, server_address, RequestHandlerClass,
1619
interface=None, use_ipv6=True, clients=None,
1620
gnutls_priority=None, use_dbus=True):
2648
interface=None,
2649
use_ipv6=True,
2650
clients=None,
2651
gnutls_priority=None,
2652
use_dbus=True,
2653
socketfd=None):
1621
2654
self.enabled = False
1622
2655
self.clients = clients
1623
2656
if self.clients is None:
1624
self.clients = set()
2657
self.clients = {}
1625
2658
self.use_dbus = use_dbus
1626
2659
self.gnutls_priority = gnutls_priority
1627
2660
IPv6_TCPServer.__init__(self, server_address,
1628
2661
RequestHandlerClass,
1629
interface = interface,
1630
use_ipv6 = use_ipv6)
2662
interface=interface,
2663
use_ipv6=use_ipv6,
2664
socketfd=socketfd)
2665
1631
2666
def server_activate(self):
1632
2667
if self.enabled:
1633
2668
return socketserver.TCPServer.server_activate(self)
2669
1634
2670
def enable(self):
1635
2671
self.enabled = True
1636
def add_pipe(self, parent_pipe):
2672
2673
def add_pipe(self, parent_pipe, proc):
1637
2674
# Call "handle_ipc" for both data and EOF events
1638
gobject.io_add_watch(parent_pipe.fileno(),
1639
gobject.IO_IN | gobject.IO_HUP,
1640
functools.partial(self.handle_ipc,
1641
parent_pipe =
1642
parent_pipe))
1643
1644
def handle_ipc(self, source, condition, parent_pipe=None,
2675
GLib.io_add_watch(
2676
parent_pipe.fileno(),
2677
GLib.IO_IN | GLib.IO_HUP,
2678
functools.partial(self.handle_ipc,
2679
parent_pipe=parent_pipe,
2680
proc=proc))
2681
2682
def handle_ipc(self, source, condition,
2683
parent_pipe=None,
2684
proc=None,
1645
2685
client_object=None):
1646
condition_names = {
1647
gobject.IO_IN: "IN", # There is data to read.
1648
gobject.IO_OUT: "OUT", # Data can be written (without
1649
# blocking).
1650
gobject.IO_PRI: "PRI", # There is urgent data to read.
1651
gobject.IO_ERR: "ERR", # Error condition.
1652
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1653
# broken, usually for pipes and
1654
# sockets).
1655
}
1656
conditions_string = ' | '.join(name
1657
for cond, name in
1658
condition_names.iteritems()
1659
if cond & condition)
1660
# error or the other end of multiprocessing.Pipe has closed
1661
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2686
# error, or the other end of multiprocessing.Pipe has closed
2687
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2688
# Wait for other process to exit
2689
proc.join()
1662
2690
return False
1663
2691
1664
2692
# Read a request from the child
1665
2693
request = parent_pipe.recv()
1666
2694
command = request[0]
1667
2695
1668
2696
if command == 'init':
1669
fpr = request[1]
1670
address = request[2]
1671
1672
for c in self.clients:
1673
if c.fingerprint == fpr:
2697
key_id = request[1].decode("ascii")
2698
fpr = request[2].decode("ascii")
2699
address = request[3]
2700
2701
for c in self.clients.values():
2702
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2703
continue
2704
if key_id and c.key_id == key_id:
2705
client = c
2706
break
2707
if fpr and c.fingerprint == fpr:
1674
2708
client = c
1675
2709
break
1676
2710
else:
1677
logger.info("Client not found for fingerprint: %s, ad"
1678
"dress: %s", fpr, address)
2711
logger.info("Client not found for key ID: %s, address"
2712
": %s", key_id or fpr, address)
1679
2713
if self.use_dbus:
1680
2714
# Emit D-Bus signal
1681
mandos_dbus_service.ClientNotFound(fpr,
2715
mandos_dbus_service.ClientNotFound(key_id or fpr,
1682
2716
address[0])
1683
2717
parent_pipe.send(False)
1684
2718
return False
1685
1686
gobject.io_add_watch(parent_pipe.fileno(),
1687
gobject.IO_IN | gobject.IO_HUP,
1688
functools.partial(self.handle_ipc,
1689
parent_pipe =
1690
parent_pipe,
1691
client_object =
1692
client))
2719
2720
GLib.io_add_watch(
2721
parent_pipe.fileno(),
2722
GLib.IO_IN | GLib.IO_HUP,
2723
functools.partial(self.handle_ipc,
2724
parent_pipe=parent_pipe,
2725
proc=proc,
2726
client_object=client))
1693
2727
parent_pipe.send(True)
1694
2728
# remove the old hook in favor of the new above hook on
1695
2729
# same fileno
1698
2732
funcname = request[1]
1699
2733
args = request[2]
1700
2734
kwargs = request[3]
1701
2735
1702
2736
parent_pipe.send(('data', getattr(client_object,
1703
2737
funcname)(*args,
1704
**kwargs)))
1705
2738
**kwargs)))
2739
1706
2740
if command == 'getattr':
1707
2741
attrname = request[1]
1708
if callable(client_object.__getattribute__(attrname)):
1709
parent_pipe.send(('function',))
2742
if isinstance(client_object.__getattribute__(attrname),
2743
collections.Callable):
2744
parent_pipe.send(('function', ))
1710
2745
else:
1711
parent_pipe.send(('data', client_object
1712
.__getattribute__(attrname)))
1713
2746
parent_pipe.send((
2747
'data', client_object.__getattribute__(attrname)))
2748
1714
2749
if command == 'setattr':
1715
2750
attrname = request[1]
1716
2751
value = request[2]
1717
2752
setattr(client_object, attrname, value)
1718
2753
1719
2754
return True
1720
2755
1721
2756
2757
def rfc3339_duration_to_delta(duration):
2758
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2759
2760
>>> rfc3339_duration_to_delta("P7D")
2761
datetime.timedelta(7)
2762
>>> rfc3339_duration_to_delta("PT60S")
2763
datetime.timedelta(0, 60)
2764
>>> rfc3339_duration_to_delta("PT60M")
2765
datetime.timedelta(0, 3600)
2766
>>> rfc3339_duration_to_delta("PT24H")
2767
datetime.timedelta(1)
2768
>>> rfc3339_duration_to_delta("P1W")
2769
datetime.timedelta(7)
2770
>>> rfc3339_duration_to_delta("PT5M30S")
2771
datetime.timedelta(0, 330)
2772
>>> rfc3339_duration_to_delta("P1DT3M20S")
2773
datetime.timedelta(1, 200)
2774
"""
2775
2776
# Parsing an RFC 3339 duration with regular expressions is not
2777
# possible - there would have to be multiple places for the same
2778
# values, like seconds. The current code, while more esoteric, is
2779
# cleaner without depending on a parsing library. If Python had a
2780
# built-in library for parsing we would use it, but we'd like to
2781
# avoid excessive use of external libraries.
2782
2783
# New type for defining tokens, syntax, and semantics all-in-one
2784
Token = collections.namedtuple("Token", (
2785
"regexp", # To match token; if "value" is not None, must have
2786
# a "group" containing digits
2787
"value", # datetime.timedelta or None
2788
"followers")) # Tokens valid after this token
2789
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2790
# the "duration" ABNF definition in RFC 3339, Appendix A.
2791
token_end = Token(re.compile(r"$"), None, frozenset())
2792
token_second = Token(re.compile(r"(\d+)S"),
2793
datetime.timedelta(seconds=1),
2794
frozenset((token_end, )))
2795
token_minute = Token(re.compile(r"(\d+)M"),
2796
datetime.timedelta(minutes=1),
2797
frozenset((token_second, token_end)))
2798
token_hour = Token(re.compile(r"(\d+)H"),
2799
datetime.timedelta(hours=1),
2800
frozenset((token_minute, token_end)))
2801
token_time = Token(re.compile(r"T"),
2802
None,
2803
frozenset((token_hour, token_minute,
2804
token_second)))
2805
token_day = Token(re.compile(r"(\d+)D"),
2806
datetime.timedelta(days=1),
2807
frozenset((token_time, token_end)))
2808
token_month = Token(re.compile(r"(\d+)M"),
2809
datetime.timedelta(weeks=4),
2810
frozenset((token_day, token_end)))
2811
token_year = Token(re.compile(r"(\d+)Y"),
2812
datetime.timedelta(weeks=52),
2813
frozenset((token_month, token_end)))
2814
token_week = Token(re.compile(r"(\d+)W"),
2815
datetime.timedelta(weeks=1),
2816
frozenset((token_end, )))
2817
token_duration = Token(re.compile(r"P"), None,
2818
frozenset((token_year, token_month,
2819
token_day, token_time,
2820
token_week)))
2821
# Define starting values:
2822
# Value so far
2823
value = datetime.timedelta()
2824
found_token = None
2825
# Following valid tokens
2826
followers = frozenset((token_duration, ))
2827
# String left to parse
2828
s = duration
2829
# Loop until end token is found
2830
while found_token is not token_end:
2831
# Search for any currently valid tokens
2832
for token in followers:
2833
match = token.regexp.match(s)
2834
if match is not None:
2835
# Token found
2836
if token.value is not None:
2837
# Value found, parse digits
2838
factor = int(match.group(1), 10)
2839
# Add to value so far
2840
value += factor * token.value
2841
# Strip token from string
2842
s = token.regexp.sub("", s, 1)
2843
# Go to found token
2844
found_token = token
2845
# Set valid next tokens
2846
followers = found_token.followers
2847
break
2848
else:
2849
# No currently valid tokens were found
2850
raise ValueError("Invalid RFC 3339 duration: {!r}"
2851
.format(duration))
2852
# End token found
2853
return value
2854
2855
1722
2856
def string_to_delta(interval):
1723
2857
"""Parse a string and return a datetime.timedelta
1724
2858
1725
2859
>>> string_to_delta('7d')
1726
2860
datetime.timedelta(7)
1727
2861
>>> string_to_delta('60s')
1735
2869
>>> string_to_delta('5m 30s')
1736
2870
datetime.timedelta(0, 330)
1737
2871
"""
2872
2873
try:
2874
return rfc3339_duration_to_delta(interval)
2875
except ValueError:
2876
pass
2877
1738
2878
timevalue = datetime.timedelta(0)
1739
2879
for s in interval.split():
1740
2880
try:
1741
suffix = unicode(s[-1])
2881
suffix = s[-1]
1742
2882
value = int(s[:-1])
1743
2883
if suffix == "d":
1744
2884
delta = datetime.timedelta(value)
1751
2891
elif suffix == "w":
1752
2892
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1753
2893
else:
1754
raise ValueError("Unknown suffix %r" % suffix)
1755
except (ValueError, IndexError) as e:
2894
raise ValueError("Unknown suffix {!r}".format(suffix))
2895
except IndexError as e:
1756
2896
raise ValueError(*(e.args))
1757
2897
timevalue += delta
1758
2898
return timevalue
1759
2899
1760
2900
1761
def if_nametoindex(interface):
1762
"""Call the C function if_nametoindex(), or equivalent
1763
1764
Note: This function cannot accept a unicode string."""
1765
global if_nametoindex
1766
try:
1767
if_nametoindex = (ctypes.cdll.LoadLibrary
1768
(ctypes.util.find_library("c"))
1769
.if_nametoindex)
1770
except (OSError, AttributeError):
1771
logger.warning("Doing if_nametoindex the hard way")
1772
def if_nametoindex(interface):
1773
"Get an interface index the hard way, i.e. using fcntl()"
1774
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1775
with contextlib.closing(socket.socket()) as s:
1776
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1777
struct.pack(str("16s16x"),
1778
interface))
1779
interface_index = struct.unpack(str("I"),
1780
ifreq[16:20])[0]
1781
return interface_index
1782
return if_nametoindex(interface)
1783
1784
1785
def daemon(nochdir = False, noclose = False):
2901
def daemon(nochdir=False, noclose=False):
1786
2902
"""See daemon(3). Standard BSD Unix function.
1787
2903
1788
2904
This should really exist as os.daemon, but it doesn't (yet)."""
1789
2905
if os.fork():
1790
2906
sys.exit()
1795
2911
sys.exit()
1796
2912
if not noclose:
1797
2913
# Close all standard open file descriptors
1798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2914
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1799
2915
if not stat.S_ISCHR(os.fstat(null).st_mode):
1800
2916
raise OSError(errno.ENODEV,
1801
"%s not a character device"
1802
% os.path.devnull)
2917
"{} not a character device"
2918
.format(os.devnull))
1803
2919
os.dup2(null, sys.stdin.fileno())
1804
2920
os.dup2(null, sys.stdout.fileno())
1805
2921
os.dup2(null, sys.stderr.fileno())
1808
2924
1809
2925
1810
2926
def main():
1811
2927
1812
2928
##################################################################
1813
2929
# Parsing of options, both command line and config file
1814
2930
1815
2931
parser = argparse.ArgumentParser()
1816
2932
parser.add_argument("-v", "--version", action="version",
1817
version = "%%(prog)s %s" % version,
2933
version="%(prog)s {}".format(version),
1818
2934
help="show version number and exit")
1819
2935
parser.add_argument("-i", "--interface", metavar="IF",
1820
2936
help="Bind to interface IF")
1826
2942
help="Run self-test")
1827
2943
parser.add_argument("--debug", action="store_true",
1828
2944
help="Debug mode; run in foreground and log"
1829
" to terminal")
2945
" to terminal", default=None)
1830
2946
parser.add_argument("--debuglevel", metavar="LEVEL",
1831
2947
help="Debug level for stdout output")
1832
2948
parser.add_argument("--priority", help="GnuTLS"
1839
2955
" files")
1840
2956
parser.add_argument("--no-dbus", action="store_false",
1841
2957
dest="use_dbus", help="Do not provide D-Bus"
1842
" system bus interface")
2958
" system bus interface", default=None)
1843
2959
parser.add_argument("--no-ipv6", action="store_false",
1844
dest="use_ipv6", help="Do not use IPv6")
2960
dest="use_ipv6", help="Do not use IPv6",
2961
default=None)
2962
parser.add_argument("--no-restore", action="store_false",
2963
dest="restore", help="Do not restore stored"
2964
" state", default=None)
2965
parser.add_argument("--socket", type=int,
2966
help="Specify a file descriptor to a network"
2967
" socket to use instead of creating one")
2968
parser.add_argument("--statedir", metavar="DIR",
2969
help="Directory to save/restore state in")
2970
parser.add_argument("--foreground", action="store_true",
2971
help="Run in foreground", default=None)
2972
parser.add_argument("--no-zeroconf", action="store_false",
2973
dest="zeroconf", help="Do not use Zeroconf",
2974
default=None)
2975
1845
2976
options = parser.parse_args()
1846
2977
1847
2978
if options.check:
1848
2979
import doctest
1849
doctest.testmod()
1850
sys.exit()
1851
2980
fail_count, test_count = doctest.testmod()
2981
sys.exit(os.EX_OK if fail_count == 0 else 1)
2982
1852
2983
# Default values for config file for server-global settings
1853
server_defaults = { "interface": "",
1854
"address": "",
1855
"port": "",
1856
"debug": "False",
1857
"priority":
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1859
"servicename": "Mandos",
1860
"use_dbus": "True",
1861
"use_ipv6": "True",
1862
"debuglevel": "",
1863
}
1864
2984
if gnutls.has_rawpk:
2985
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2986
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
else:
2988
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2989
":+SIGN-DSA-SHA256")
2990
server_defaults = {"interface": "",
2991
"address": "",
2992
"port": "",
2993
"debug": "False",
2994
"priority": priority,
2995
"servicename": "Mandos",
2996
"use_dbus": "True",
2997
"use_ipv6": "True",
2998
"debuglevel": "",
2999
"restore": "True",
3000
"socket": "",
3001
"statedir": "/var/lib/mandos",
3002
"foreground": "False",
3003
"zeroconf": "True",
3004
}
3005
del priority
3006
1865
3007
# Parse config file for server-global settings
1866
server_config = configparser.SafeConfigParser(server_defaults)
3008
server_config = configparser.ConfigParser(server_defaults)
1867
3009
del server_defaults
1868
server_config.read(os.path.join(options.configdir,
1869
"mandos.conf"))
1870
# Convert the SafeConfigParser object to a dict
3010
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3011
# Convert the ConfigParser object to a dict
1871
3012
server_settings = server_config.defaults()
1872
3013
# Use the appropriate methods on the non-string config options
1873
for option in ("debug", "use_dbus", "use_ipv6"):
3014
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3015
"foreground", "zeroconf"):
1874
3016
server_settings[option] = server_config.getboolean("DEFAULT",
1875
3017
option)
1876
3018
if server_settings["port"]:
1877
3019
server_settings["port"] = server_config.getint("DEFAULT",
1878
3020
"port")
3021
if server_settings["socket"]:
3022
server_settings["socket"] = server_config.getint("DEFAULT",
3023
"socket")
3024
# Later, stdin will, and stdout and stderr might, be dup'ed
3025
# over with an opened os.devnull. But we don't want this to
3026
# happen with a supplied network socket.
3027
if 0 <= server_settings["socket"] <= 2:
3028
server_settings["socket"] = os.dup(server_settings
3029
["socket"])
1879
3030
del server_config
1880
3031
1881
3032
# Override the settings from the config file with command line
1882
3033
# options, if set.
1883
3034
for option in ("interface", "address", "port", "debug",
1884
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
3035
"priority", "servicename", "configdir", "use_dbus",
3036
"use_ipv6", "debuglevel", "restore", "statedir",
3037
"socket", "foreground", "zeroconf"):
1886
3038
value = getattr(options, option)
1887
3039
if value is not None:
1888
3040
server_settings[option] = value
1889
3041
del options
1890
3042
# Force all strings to be unicode
1891
3043
for option in server_settings.keys():
1892
if type(server_settings[option]) is str:
1893
server_settings[option] = unicode(server_settings[option])
3044
if isinstance(server_settings[option], bytes):
3045
server_settings[option] = (server_settings[option]
3046
.decode("utf-8"))
3047
# Force all boolean options to be boolean
3048
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3049
"foreground", "zeroconf"):
3050
server_settings[option] = bool(server_settings[option])
3051
# Debug implies foreground
3052
if server_settings["debug"]:
3053
server_settings["foreground"] = True
1894
3054
# Now we have our good server settings in "server_settings"
1895
3055
1896
3056
##################################################################
1897
3057
3058
if (not server_settings["zeroconf"]
3059
and not (server_settings["port"]
3060
or server_settings["socket"] != "")):
3061
parser.error("Needs port or socket to work without Zeroconf")
3062
1898
3063
# For convenience
1899
3064
debug = server_settings["debug"]
1900
3065
debuglevel = server_settings["debuglevel"]
1901
3066
use_dbus = server_settings["use_dbus"]
1902
3067
use_ipv6 = server_settings["use_ipv6"]
1903
3068
stored_state_path = os.path.join(server_settings["statedir"],
3069
stored_state_file)
3070
foreground = server_settings["foreground"]
3071
zeroconf = server_settings["zeroconf"]
3072
3073
if debug:
3074
initlogger(debug, logging.DEBUG)
3075
else:
3076
if not debuglevel:
3077
initlogger(debug)
3078
else:
3079
level = getattr(logging, debuglevel.upper())
3080
initlogger(debug, level)
3081
1904
3082
if server_settings["servicename"] != "Mandos":
1905
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
1909
3083
syslogger.setFormatter(
3084
logging.Formatter('Mandos ({}) [%(process)d]:'
3085
' %(levelname)s: %(message)s'.format(
3086
server_settings["servicename"])))
3087
1910
3088
# Parse config file with clients
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1913
"interval": "2m",
1914
"checker": "fping -q -- %%(host)s",
1915
"host": "",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1918
}
1919
client_config = configparser.SafeConfigParser(client_defaults)
3089
client_config = configparser.ConfigParser(Client.client_defaults)
1920
3090
client_config.read(os.path.join(server_settings["configdir"],
1921
3091
"clients.conf"))
1922
3092
1923
3093
global mandos_dbus_service
1924
3094
mandos_dbus_service = None
1925
1926
tcp_server = MandosServer((server_settings["address"],
1927
server_settings["port"]),
1928
ClientHandler,
1929
interface=(server_settings["interface"]
1930
or None),
1931
use_ipv6=use_ipv6,
1932
gnutls_priority=
1933
server_settings["priority"],
1934
use_dbus=use_dbus)
1935
if not debug:
1936
pidfilename = "/var/run/mandos.pid"
1937
try:
1938
pidfile = open(pidfilename, "w")
1939
except IOError:
1940
logger.error("Could not open file %r", pidfilename)
1941
1942
try:
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1945
except KeyError:
1946
try:
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
3095
3096
socketfd = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3101
ClientHandler,
3102
interface=(server_settings["interface"] or None),
3103
use_ipv6=use_ipv6,
3104
gnutls_priority=server_settings["priority"],
3105
use_dbus=use_dbus,
3106
socketfd=socketfd)
3107
if not foreground:
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3111
pidfile = None
3112
try:
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3116
exc_info=e)
3117
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3121
try:
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
3124
break
1949
3125
except KeyError:
1950
try:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
1953
except KeyError:
1954
uid = 65534
1955
gid = 65534
3126
continue
3127
else:
3128
uid = 65534
3129
gid = 65534
1956
3130
try:
1957
3131
os.setgid(gid)
1958
3132
os.setuid(uid)
3133
if debug:
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3135
gid))
1959
3136
except OSError as error:
1960
if error[0] != errno.EPERM:
1961
raise error
1962
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1966
if debuglevel:
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
1970
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
3140
raise
3141
1971
3142
if debug:
1972
3143
# Enable all possible GnuTLS debugging
1973
3144
1974
3145
# "Use a log level over 10 to enable all debugging options."
1975
3146
# - GnuTLS manual
1976
gnutls.library.functions.gnutls_global_set_log_level(11)
1977
1978
@gnutls.library.types.gnutls_log_func
3147
gnutls.global_set_log_level(11)
3148
3149
@gnutls.log_func
1979
3150
def debug_gnutls(level, string):
1980
3151
logger.debug("GnuTLS: %s", string[:-1])
1981
1982
(gnutls.library.functions
1983
.gnutls_global_set_log_function(debug_gnutls))
1984
3152
3153
gnutls.global_set_log_function(debug_gnutls)
3154
1985
3155
# Redirect stdin so all checkers get /dev/null
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1987
3157
os.dup2(null, sys.stdin.fileno())
1988
3158
if null > 2:
1989
3159
os.close(null)
1990
else:
1991
# No console logging
1992
logger.removeHandler(console)
1993
3160
1994
3161
# Need to fork before connecting to D-Bus
1995
if not debug:
3162
if not foreground:
1996
3163
# Close all input and output, do double fork, etc.
1997
3164
daemon()
1998
3165
3166
if gi.version_info < (3, 10, 2):
3167
# multiprocessing will use threads, so before we use GLib we
3168
# need to inform GLib that threads will be used.
3169
GLib.threads_init()
3170
1999
3171
global main_loop
2000
3172
# From the Avahi example code
2001
DBusGMainLoop(set_as_default=True )
2002
main_loop = gobject.MainLoop()
3173
DBusGMainLoop(set_as_default=True)
3174
main_loop = GLib.MainLoop()
2003
3175
bus = dbus.SystemBus()
2004
3176
# End of Avahi example code
2005
3177
if use_dbus:
2006
3178
try:
2007
3179
bus_name = dbus.service.BusName("se.recompile.Mandos",
2008
bus, do_not_queue=True)
2009
old_bus_name = (dbus.service.BusName
2010
("se.bsnet.fukt.Mandos", bus,
2011
do_not_queue=True))
2012
except dbus.exceptions.NameExistsException as e:
2013
logger.error(unicode(e) + ", disabling D-Bus")
3180
bus,
3181
do_not_queue=True)
3182
old_bus_name = dbus.service.BusName(
3183
"se.bsnet.fukt.Mandos", bus,
3184
do_not_queue=True)
3185
except dbus.exceptions.DBusException as e:
3186
logger.error("Disabling D-Bus:", exc_info=e)
2014
3187
use_dbus = False
2015
3188
server_settings["use_dbus"] = False
2016
3189
tcp_server.use_dbus = False
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(str(server_settings["interface"])))
2024
3190
if zeroconf:
3191
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3192
service = AvahiServiceToSyslog(
3193
name=server_settings["servicename"],
3194
servicetype="_mandos._tcp",
3195
protocol=protocol,
3196
bus=bus)
3197
if server_settings["interface"]:
3198
service.interface = if_nametoindex(
3199
server_settings["interface"].encode("utf-8"))
3200
2025
3201
global multiprocessing_manager
2026
3202
multiprocessing_manager = multiprocessing.Manager()
2027
3203
2028
3204
client_class = Client
2029
3205
if use_dbus:
2030
client_class = functools.partial(ClientDBusTransitional,
2031
bus = bus)
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2037
}
2038
for name, value in config.items(section):
3206
client_class = functools.partial(ClientDBus, bus=bus)
3207
3208
client_settings = Client.config_parser(client_config)
3209
old_client_settings = {}
3210
clients_data = {}
3211
3212
# This is used to redirect stdout and stderr for checker processes
3213
global wnull
3214
wnull = open(os.devnull, "w") # A writable /dev/null
3215
# Only used if server is running in foreground but not in debug
3216
# mode
3217
if debug or not foreground:
3218
wnull.close()
3219
3220
# Get client data and settings from last running state.
3221
if server_settings["restore"]:
3222
try:
3223
with open(stored_state_path, "rb") as stored_state:
3224
if sys.version_info.major == 2:
3225
clients_data, old_client_settings = pickle.load(
3226
stored_state)
3227
else:
3228
bytes_clients_data, bytes_old_client_settings = (
3229
pickle.load(stored_state, encoding="bytes"))
3230
# Fix bytes to strings
3231
# clients_data
3232
# .keys()
3233
clients_data = {(key.decode("utf-8")
3234
if isinstance(key, bytes)
3235
else key): value
3236
for key, value in
3237
bytes_clients_data.items()}
3238
del bytes_clients_data
3239
for key in clients_data:
3240
value = {(k.decode("utf-8")
3241
if isinstance(k, bytes) else k): v
3242
for k, v in
3243
clients_data[key].items()}
3244
clients_data[key] = value
3245
# .client_structure
3246
value["client_structure"] = [
3247
(s.decode("utf-8")
3248
if isinstance(s, bytes)
3249
else s) for s in
3250
value["client_structure"]]
3251
# .name & .host
3252
for k in ("name", "host"):
3253
if isinstance(value[k], bytes):
3254
value[k] = value[k].decode("utf-8")
3255
if "key_id" not in value:
3256
value["key_id"] = ""
3257
elif "fingerprint" not in value:
3258
value["fingerprint"] = ""
3259
# old_client_settings
3260
# .keys()
3261
old_client_settings = {
3262
(key.decode("utf-8")
3263
if isinstance(key, bytes)
3264
else key): value
3265
for key, value in
3266
bytes_old_client_settings.items()}
3267
del bytes_old_client_settings
3268
# .host
3269
for value in old_client_settings.values():
3270
if isinstance(value["host"], bytes):
3271
value["host"] = (value["host"]
3272
.decode("utf-8"))
3273
os.remove(stored_state_path)
3274
except IOError as e:
3275
if e.errno == errno.ENOENT:
3276
logger.warning("Could not load persistent state:"
3277
" {}".format(os.strerror(e.errno)))
3278
else:
3279
logger.critical("Could not load persistent state:",
3280
exc_info=e)
3281
raise
3282
except EOFError as e:
3283
logger.warning("Could not load persistent state: "
3284
"EOFError:",
3285
exc_info=e)
3286
3287
with PGPEngine() as pgp:
3288
for client_name, client in clients_data.items():
3289
# Skip removed clients
3290
if client_name not in client_settings:
3291
continue
3292
3293
# Decide which value to use after restoring saved state.
3294
# We have three different values: Old config file,
3295
# new config file, and saved state.
3296
# New config value takes precedence if it differs from old
3297
# config value, otherwise use saved state.
3298
for name, value in client_settings[client_name].items():
3299
try:
3300
# For each value in new config, check if it
3301
# differs from the old config value (Except for
3302
# the "secret" attribute)
3303
if (name != "secret"
3304
and (value !=
3305
old_client_settings[client_name][name])):
3306
client[name] = value
3307
except KeyError:
3308
pass
3309
3310
# Clients who has passed its expire date can still be
3311
# enabled if its last checker was successful. A Client
3312
# whose checker succeeded before we stored its state is
3313
# assumed to have successfully run all checkers during
3314
# downtime.
3315
if client["enabled"]:
3316
if datetime.datetime.utcnow() >= client["expires"]:
3317
if not client["last_checked_ok"]:
3318
logger.warning(
3319
"disabling client {} - Client never "
3320
"performed a successful checker".format(
3321
client_name))
3322
client["enabled"] = False
3323
elif client["last_checker_status"] != 0:
3324
logger.warning(
3325
"disabling client {} - Client last"
3326
" checker failed with error code"
3327
" {}".format(
3328
client_name,
3329
client["last_checker_status"]))
3330
client["enabled"] = False
3331
else:
3332
client["expires"] = (
3333
datetime.datetime.utcnow()
3334
+ client["timeout"])
3335
logger.debug("Last checker succeeded,"
3336
" keeping {} enabled".format(
3337
client_name))
2039
3338
try:
2040
yield (name, special_settings[name]())
2041
except KeyError:
2042
yield (name, value)
2043
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
3339
client["secret"] = pgp.decrypt(
3340
client["encrypted_secret"],
3341
client_settings[client_name]["secret"])
3342
except PGPError:
3343
# If decryption fails, we use secret from new settings
3344
logger.debug("Failed to decrypt {} old secret".format(
3345
client_name))
3346
client["secret"] = (client_settings[client_name]
3347
["secret"])
3348
3349
# Add/remove clients based on new changes made to config
3350
for client_name in (set(old_client_settings)
3351
- set(client_settings)):
3352
del clients_data[client_name]
3353
for client_name in (set(client_settings)
3354
- set(old_client_settings)):
3355
clients_data[client_name] = client_settings[client_name]
3356
3357
# Create all client objects
3358
for client_name, client in clients_data.items():
3359
tcp_server.clients[client_name] = client_class(
3360
name=client_name,
3361
settings=client,
3362
server_settings=server_settings)
3363
2049
3364
if not tcp_server.clients:
2050
3365
logger.warning("No clients defined")
2051
2052
if not debug:
2053
try:
2054
with pidfile:
2055
pid = os.getpid()
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2057
del pidfile
2058
except IOError:
2059
logger.error("Could not write to file %r with PID %d",
2060
pidfilename, pid)
2061
except NameError:
2062
# "pidfile" was never created
2063
pass
3366
3367
if not foreground:
3368
if pidfile is not None:
3369
pid = os.getpid()
3370
try:
3371
with pidfile:
3372
print(pid, file=pidfile)
3373
except IOError:
3374
logger.error("Could not write to file %r with PID %d",
3375
pidfilename, pid)
3376
del pidfile
2064
3377
del pidfilename
2065
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2067
2068
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2070
3378
3379
for termsig in (signal.SIGHUP, signal.SIGTERM):
3380
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3381
lambda: main_loop.quit() and False)
3382
2071
3383
if use_dbus:
2072
class MandosDBusService(dbus.service.Object):
3384
3385
@alternate_dbus_interfaces(
3386
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3387
class MandosDBusService(DBusObjectWithObjectManager):
2073
3388
"""A D-Bus proxy object"""
3389
2074
3390
def __init__(self):
2075
3391
dbus.service.Object.__init__(self, bus, "/")
3392
2076
3393
_interface = "se.recompile.Mandos"
2077
3394
2078
3395
@dbus.service.signal(_interface, signature="o")
2079
3396
def ClientAdded(self, objpath):
2080
3397
"D-Bus signal"
2081
3398
pass
2082
3399
2083
3400
@dbus.service.signal(_interface, signature="ss")
2084
def ClientNotFound(self, fingerprint, address):
3401
def ClientNotFound(self, key_id, address):
2085
3402
"D-Bus signal"
2086
3403
pass
2087
3404
3405
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3406
"true"})
2088
3407
@dbus.service.signal(_interface, signature="os")
2089
3408
def ClientRemoved(self, objpath, name):
2090
3409
"D-Bus signal"
2091
3410
pass
2092
3411
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
"true"})
2093
3414
@dbus.service.method(_interface, out_signature="ao")
2094
3415
def GetAllClients(self):
2095
3416
"D-Bus method"
2096
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
2098
3417
return dbus.Array(c.dbus_object_path for c in
3418
tcp_server.clients.values())
3419
3420
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3421
"true"})
2099
3422
@dbus.service.method(_interface,
2100
3423
out_signature="a{oa{sv}}")
2101
3424
def GetAllClientsWithProperties(self):
2102
3425
"D-Bus method"
2103
3426
return dbus.Dictionary(
2104
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
3427
{c.dbus_object_path: c.GetAll(
3428
"se.recompile.Mandos.Client")
3429
for c in tcp_server.clients.values()},
2106
3430
signature="oa{sv}")
2107
3431
2108
3432
@dbus.service.method(_interface, in_signature="o")
2109
3433
def RemoveClient(self, object_path):
2110
3434
"D-Bus method"
2111
for c in tcp_server.clients:
3435
for c in tcp_server.clients.values():
2112
3436
if c.dbus_object_path == object_path:
2113
tcp_server.clients.remove(c)
3437
del tcp_server.clients[c.name]
2114
3438
c.remove_from_connection()
2115
# Don't signal anything except ClientRemoved
3439
# Don't signal the disabling
2116
3440
c.disable(quiet=True)
2117
# Emit D-Bus signal
2118
self.ClientRemoved(object_path, c.name)
3441
# Emit D-Bus signal for removal
3442
self.client_removed_signal(c)
2119
3443
return
2120
3444
raise KeyError(object_path)
2121
3445
2122
3446
del _interface
2123
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
2127
3447
3448
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3449
out_signature="a{oa{sa{sv}}}")
3450
def GetManagedObjects(self):
3451
"""D-Bus method"""
3452
return dbus.Dictionary(
3453
{client.dbus_object_path:
3454
dbus.Dictionary(
3455
{interface: client.GetAll(interface)
3456
for interface in
3457
client._get_all_interface_names()})
3458
for client in tcp_server.clients.values()})
3459
3460
def client_added_signal(self, client):
3461
"""Send the new standard signal and the old signal"""
3462
if use_dbus:
3463
# New standard signal
3464
self.InterfacesAdded(
3465
client.dbus_object_path,
3466
dbus.Dictionary(
3467
{interface: client.GetAll(interface)
3468
for interface in
3469
client._get_all_interface_names()}))
3470
# Old signal
3471
self.ClientAdded(client.dbus_object_path)
3472
3473
def client_removed_signal(self, client):
3474
"""Send the new standard signal and the old signal"""
3475
if use_dbus:
3476
# New standard signal
3477
self.InterfacesRemoved(
3478
client.dbus_object_path,
3479
client._get_all_interface_names())
3480
# Old signal
3481
self.ClientRemoved(client.dbus_object_path,
3482
client.name)
3483
3484
mandos_dbus_service = MandosDBusService()
3485
3486
# Save modules to variables to exempt the modules from being
3487
# unloaded before the function registered with atexit() is run.
3488
mp = multiprocessing
3489
wn = wnull
3490
2128
3491
def cleanup():
2129
3492
"Cleanup function; run on exit"
2130
service.cleanup()
2131
3493
if zeroconf:
3494
service.cleanup()
3495
3496
mp.active_children()
3497
wn.close()
3498
if not (tcp_server.clients or client_settings):
3499
return
3500
3501
# Store client before exiting. Secrets are encrypted with key
3502
# based on what config file has. If config file is
3503
# removed/edited, old secret will thus be unrecovable.
3504
clients = {}
3505
with PGPEngine() as pgp:
3506
for client in tcp_server.clients.values():
3507
key = client_settings[client.name]["secret"]
3508
client.encrypted_secret = pgp.encrypt(client.secret,
3509
key)
3510
client_dict = {}
3511
3512
# A list of attributes that can not be pickled
3513
# + secret.
3514
exclude = {"bus", "changedstate", "secret",
3515
"checker", "server_settings"}
3516
for name, typ in inspect.getmembers(dbus.service
3517
.Object):
3518
exclude.add(name)
3519
3520
client_dict["encrypted_secret"] = (client
3521
.encrypted_secret)
3522
for attr in client.client_structure:
3523
if attr not in exclude:
3524
client_dict[attr] = getattr(client, attr)
3525
3526
clients[client.name] = client_dict
3527
del client_settings[client.name]["secret"]
3528
3529
try:
3530
with tempfile.NamedTemporaryFile(
3531
mode='wb',
3532
suffix=".pickle",
3533
prefix='clients-',
3534
dir=os.path.dirname(stored_state_path),
3535
delete=False) as stored_state:
3536
pickle.dump((clients, client_settings), stored_state,
3537
protocol=2)
3538
tempname = stored_state.name
3539
os.rename(tempname, stored_state_path)
3540
except (IOError, OSError) as e:
3541
if not debug:
3542
try:
3543
os.remove(tempname)
3544
except NameError:
3545
pass
3546
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3547
logger.warning("Could not save persistent state: {}"
3548
.format(os.strerror(e.errno)))
3549
else:
3550
logger.warning("Could not save persistent state:",
3551
exc_info=e)
3552
raise
3553
3554
# Delete all clients, and settings from config
2132
3555
while tcp_server.clients:
2133
client = tcp_server.clients.pop()
3556
name, client = tcp_server.clients.popitem()
2134
3557
if use_dbus:
2135
3558
client.remove_from_connection()
2136
client.disable_hook = None
2137
# Don't signal anything except ClientRemoved
3559
# Don't signal the disabling
2138
3560
client.disable(quiet=True)
3561
# Emit D-Bus signal for removal
2139
3562
if use_dbus:
2140
# Emit D-Bus signal
2141
mandos_dbus_service.ClientRemoved(client
2142
.dbus_object_path,
2143
client.name)
2144
3563
mandos_dbus_service.client_removed_signal(client)
3564
client_settings.clear()
3565
2145
3566
atexit.register(cleanup)
2146
2147
for client in tcp_server.clients:
3567
3568
for client in tcp_server.clients.values():
2148
3569
if use_dbus:
2149
# Emit D-Bus signal
2150
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2151
client.enable()
2152
3570
# Emit D-Bus signal for adding
3571
mandos_dbus_service.client_added_signal(client)
3572
# Need to initiate checking of clients
3573
if client.enabled:
3574
client.init_checker()
3575
2153
3576
tcp_server.enable()
2154
3577
tcp_server.server_activate()
2155
3578
2156
3579
# Find out what port we got
2157
service.port = tcp_server.socket.getsockname()[1]
3580
if zeroconf:
3581
service.port = tcp_server.socket.getsockname()[1]
2158
3582
if use_ipv6:
2159
3583
logger.info("Now listening on address %r, port %d,"
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
3584
" flowinfo %d, scope_id %d",
3585
*tcp_server.socket.getsockname())
2162
3586
else: # IPv4
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
2165
2166
#service.interface = tcp_server.socket.getsockname()[3]
2167
3587
logger.info("Now listening on address %r, port %d",
3588
*tcp_server.socket.getsockname())
3589
3590
# service.interface = tcp_server.socket.getsockname()[3]
3591
2168
3592
try:
2169
# From the Avahi example code
2170
try:
2171
service.activate()
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2174
cleanup()
2175
sys.exit(1)
2176
# End of Avahi example code
2177
2178
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
lambda *args, **kwargs:
2180
(tcp_server.handle_request
2181
(*args[2:], **kwargs) or True))
2182
3593
if zeroconf:
3594
# From the Avahi example code
3595
try:
3596
service.activate()
3597
except dbus.exceptions.DBusException as error:
3598
logger.critical("D-Bus Exception", exc_info=error)
3599
cleanup()
3600
sys.exit(1)
3601
# End of Avahi example code
3602
3603
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3604
lambda *args, **kwargs:
3605
(tcp_server.handle_request
3606
(*args[2:], **kwargs) or True))
3607
2183
3608
logger.debug("Starting main loop")
2184
3609
main_loop.run()
2185
3610
except AvahiError as error:
2186
logger.critical("AvahiError: %s", error)
3611
logger.critical("Avahi Error", exc_info=error)
2187
3612
cleanup()
2188
3613
sys.exit(1)
2189
3614
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0