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- Committer: Teddy Hogeborn
- Date: 2019-08-05 14:31:51 UTC
- Revision ID: teddy@recompile.se-20190805143151-lt5d97wqif3t8250
Client: Debian package fix: Make uninstall when using dracut(8) work
Use the same logic to rebuild the initramfs image when uninstalling as
when installing the package.
* debian/mandos-client.postrm (update_initramfs): Use the same logic
as the update_initramfs function in debian/mandos-client.postinst.
Use the same logic to rebuild the initramfs image when uninstalling as
when installing the package.
* debian/mandos-client.postrm (update_initramfs): Use the same logic
as the update_initramfs function in debian/mandos-client.postinst.
- 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
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
66
80
67
81
import dbus
68
82
import dbus.service
69
import gobject
70
import avahi
83
import gi
84
from gi.repository import GLib
71
85
from dbus.mainloop.glib import DBusGMainLoop
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86
import ctypes
73
87
import ctypes.util
74
88
import xml.dom.minidom
75
89
import inspect
76
90
91
# Try to find the value of SO_BINDTODEVICE:
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92
try:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
78
95
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
96
except AttributeError:
80
97
try:
98
# This is where SO_BINDTODEVICE was up to and including Python
99
# 2.6, and also 3.2:
81
100
from IN import SO_BINDTODEVICE
82
101
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
104
try:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
"/dev/stdin"],
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
113
# No value found
114
SO_BINDTODEVICE = None
115
116
if sys.version_info.major == 2:
117
str = unicode
118
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
121
122
version = "1.8.6"
123
stored_state_file = "clients.pickle"
124
125
logger = logging.getLogger()
126
syslogger = None
127
128
try:
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
131
except (OSError, AttributeError):
132
133
def if_nametoindex(interface):
134
"Get an interface index the hard way, i.e. using fcntl()"
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
136
with contextlib.closing(socket.socket()) as s:
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
140
return interface_index
141
142
143
def copy_function(func):
144
"""Make a copy of a function"""
145
if sys.version_info.major == 2:
146
return types.FunctionType(func.func_code,
147
func.func_globals,
148
func.func_name,
149
func.func_defaults,
150
func.func_closure)
151
else:
152
return types.FunctionType(func.__code__,
153
func.__globals__,
154
func.__name__,
155
func.__defaults__,
156
func.__closure__)
157
158
159
def initlogger(debug, level=logging.WARNING):
160
"""init logger and add loglevel"""
161
162
global syslogger
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
165
address="/dev/log"))
166
syslogger.setFormatter(logging.Formatter
167
('Mandos [%(process)d]: %(levelname)s:'
168
' %(message)s'))
169
logger.addHandler(syslogger)
170
171
if debug:
172
console = logging.StreamHandler()
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
174
' [%(process)d]:'
175
' %(levelname)s:'
176
' %(message)s'))
177
logger.addHandler(console)
178
logger.setLevel(level)
179
180
181
class PGPError(Exception):
182
"""Exception if encryption/decryption fails"""
183
pass
184
185
186
class PGPEngine(object):
187
"""A simple class for OpenPGP symmetric encryption & decryption"""
188
189
def __init__(self):
190
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
191
self.gpg = "gpg"
192
try:
193
output = subprocess.check_output(["gpgconf"])
194
for line in output.splitlines():
195
name, text, path = line.split(b":")
196
if name == "gpg":
197
self.gpg = path
198
break
199
except OSError as e:
200
if e.errno != errno.ENOENT:
201
raise
202
self.gnupgargs = ['--batch',
203
'--homedir', self.tempdir,
204
'--force-mdc',
205
'--quiet']
206
# Only GPG version 1 has the --no-use-agent option.
207
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
208
self.gnupgargs.append("--no-use-agent")
209
210
def __enter__(self):
211
return self
212
213
def __exit__(self, exc_type, exc_value, traceback):
214
self._cleanup()
215
return False
216
217
def __del__(self):
218
self._cleanup()
219
220
def _cleanup(self):
221
if self.tempdir is not None:
222
# Delete contents of tempdir
223
for root, dirs, files in os.walk(self.tempdir,
224
topdown=False):
225
for filename in files:
226
os.remove(os.path.join(root, filename))
227
for dirname in dirs:
228
os.rmdir(os.path.join(root, dirname))
229
# Remove tempdir
230
os.rmdir(self.tempdir)
231
self.tempdir = None
232
233
def password_encode(self, password):
234
# Passphrase can not be empty and can not contain newlines or
235
# NUL bytes. So we prefix it and hex encode it.
236
encoded = b"mandos" + binascii.hexlify(password)
237
if len(encoded) > 2048:
238
# GnuPG can't handle long passwords, so encode differently
239
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
240
.replace(b"\n", b"\\n")
241
.replace(b"\0", b"\\x00"))
242
return encoded
243
244
def encrypt(self, data, password):
245
passphrase = self.password_encode(password)
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
248
passfile.write(passphrase)
249
passfile.flush()
250
proc = subprocess.Popen([self.gpg, '--symmetric',
251
'--passphrase-file',
252
passfile.name]
253
+ self.gnupgargs,
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
258
if proc.returncode != 0:
259
raise PGPError(err)
260
return ciphertext
261
262
def decrypt(self, data, password):
263
passphrase = self.password_encode(password)
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
266
passfile.write(passphrase)
267
passfile.flush()
268
proc = subprocess.Popen([self.gpg, '--decrypt',
269
'--passphrase-file',
270
passfile.name]
271
+ self.gnupgargs,
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
276
if proc.returncode != 0:
277
raise PGPError(err)
278
return decrypted_plaintext
279
280
281
# Pretend that we have an Avahi module
282
class avahi(object):
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
292
293
@staticmethod
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
305
103
306
104
307
class AvahiError(Exception):
105
308
def __init__(self, value, *args, **kwargs):
106
309
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
310
return super(AvahiError, self).__init__(value, *args,
311
**kwargs)
312
110
313
111
314
class AvahiServiceError(AvahiError):
112
315
pass
113
316
317
114
318
class AvahiGroupError(AvahiError):
115
319
pass
116
320
117
321
118
322
class AvahiService(object):
119
323
"""An Avahi (Zeroconf) service.
120
324
121
325
Attributes:
122
326
interface: integer; avahi.IF_UNSPEC or an interface index.
123
327
Used to optionally bind to the specified interface.
124
328
name: string; Example: 'Mandos'
125
329
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
330
See <https://www.iana.org/assignments/service-names-port-numbers>
127
331
port: integer; what port to announce
128
332
TXT: list of strings; TXT record for the service
129
333
domain: string; Domain to publish on, default to .local if empty.
135
339
server: D-Bus Server
136
340
bus: dbus.SystemBus()
137
341
"""
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):
342
343
def __init__(self,
344
interface=avahi.IF_UNSPEC,
345
name=None,
346
servicetype=None,
347
port=None,
348
TXT=None,
349
domain="",
350
host="",
351
max_renames=32768,
352
protocol=avahi.PROTO_UNSPEC,
353
bus=None):
142
354
self.interface = interface
143
355
self.name = name
144
356
self.type = servicetype
153
365
self.server = None
154
366
self.bus = bus
155
367
self.entry_group_state_changed_match = None
156
def rename(self):
368
369
def rename(self, remove=True):
157
370
"""Derived from the Avahi example code"""
158
371
if self.rename_count >= self.max_renames:
159
372
logger.critical("No suitable Zeroconf service name found"
160
373
" after %i retries, exiting.",
161
374
self.rename_count)
162
375
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
376
self.name = str(
377
self.server.GetAlternativeServiceName(self.name))
378
self.rename_count += 1
165
379
logger.info("Changing Zeroconf service name to %r ...",
166
380
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
381
if remove:
382
self.remove()
172
383
try:
173
384
self.add()
174
385
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
386
if (error.get_dbus_name()
387
== "org.freedesktop.Avahi.CollisionError"):
388
logger.info("Local Zeroconf service name collision.")
389
return self.rename(remove=False)
390
else:
391
logger.critical("D-Bus Exception", exc_info=error)
392
self.cleanup()
393
os._exit(1)
394
179
395
def remove(self):
180
396
"""Derived from the Avahi example code"""
181
397
if self.entry_group_state_changed_match is not None:
183
399
self.entry_group_state_changed_match = None
184
400
if self.group is not None:
185
401
self.group.Reset()
402
186
403
def add(self):
187
404
"""Derived from the Avahi example code"""
188
405
self.remove()
193
410
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
411
self.entry_group_state_changed_match = (
195
412
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
413
'StateChanged', self.entry_group_state_changed))
197
414
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
415
self.name, self.type)
199
416
self.group.AddService(
205
422
dbus.UInt16(self.port),
206
423
avahi.string_array_to_txt_array(self.TXT))
207
424
self.group.Commit()
425
208
426
def entry_group_state_changed(self, state, error):
209
427
"""Derived from the Avahi example code"""
210
428
logger.debug("Avahi entry group state change: %i", state)
211
429
212
430
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
431
logger.debug("Zeroconf service established.")
214
432
elif state == avahi.ENTRY_GROUP_COLLISION:
216
434
self.rename()
217
435
elif state == avahi.ENTRY_GROUP_FAILURE:
218
436
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
437
str(error))
438
raise AvahiGroupError("State changed: {!s}".format(error))
439
222
440
def cleanup(self):
223
441
"""Derived from the Avahi example code"""
224
442
if self.group is not None:
225
443
try:
226
444
self.group.Free()
227
445
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
446
dbus.exceptions.DBusException):
229
447
pass
230
448
self.group = None
231
449
self.remove()
450
232
451
def server_state_changed(self, state, error=None):
233
452
"""Derived from the Avahi example code"""
234
453
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" }
454
bad_states = {
455
avahi.SERVER_INVALID: "Zeroconf server invalid",
456
avahi.SERVER_REGISTERING: None,
457
avahi.SERVER_COLLISION: "Zeroconf server name collision",
458
avahi.SERVER_FAILURE: "Zeroconf server failure",
459
}
242
460
if state in bad_states:
243
461
if bad_states[state] is not None:
244
462
if error is None:
247
465
logger.error(bad_states[state] + ": %r", error)
248
466
self.cleanup()
249
467
elif state == avahi.SERVER_RUNNING:
250
self.add()
468
try:
469
self.add()
470
except dbus.exceptions.DBusException as error:
471
if (error.get_dbus_name()
472
== "org.freedesktop.Avahi.CollisionError"):
473
logger.info("Local Zeroconf service name"
474
" collision.")
475
return self.rename(remove=False)
476
else:
477
logger.critical("D-Bus Exception", exc_info=error)
478
self.cleanup()
479
os._exit(1)
251
480
else:
252
481
if error is None:
253
482
logger.debug("Unknown state: %r", state)
254
483
else:
255
484
logger.debug("Unknown state: %r: %r", state, error)
485
256
486
def activate(self):
257
487
"""Derived from the Avahi example code"""
258
488
if self.server is None:
262
492
follow_name_owner_changes=True),
263
493
avahi.DBUS_INTERFACE_SERVER)
264
494
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
495
self.server_state_changed)
266
496
self.server_state_changed(self.server.GetState())
267
497
268
498
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
499
class AvahiServiceToSyslog(AvahiService):
500
def rename(self, *args, **kwargs):
501
"""Add the new name to the syslog messages"""
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
505
.format(self.name)))
506
return ret
507
508
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
512
513
library = ctypes.util.find_library("gnutls")
514
if library is None:
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
517
del library
518
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
521
522
# Constants
523
E_SUCCESS = 0
524
E_INTERRUPTED = -52
525
E_AGAIN = -28
526
CRT_OPENPGP = 2
527
CRT_RAWPK = 3
528
CLIENT = 2
529
SHUT_RDWR = 0
530
CRD_CERTIFICATE = 1
531
E_NO_CERTIFICATE_FOUND = -49
532
X509_FMT_DER = 0
533
NO_TICKETS = 1<<10
534
ENABLE_RAWPK = 1<<18
535
CTYPE_PEERS = 3
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
568
# gnutls.strerror()
569
self.code = code
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
573
message, *args)
574
575
class CertificateSecurityError(Error):
576
pass
577
578
# Classes
579
class Credentials(object):
580
def __init__(self):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
585
586
def __del__(self):
587
gnutls.certificate_free_credentials(self._c_object)
588
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
595
if gnutls.has_rawpk:
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
598
del gnutls_flags
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
602
True)
603
self.socket = socket
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
608
ctypes.c_void_p))
609
self.credentials = credentials
610
611
def __del__(self):
612
gnutls.deinit(self._c_object)
613
614
def handshake(self):
615
return gnutls.handshake(self._c_object)
616
617
def send(self, data):
618
data = bytes(data)
619
data_len = len(data)
620
while data_len > 0:
621
data_len -= gnutls.record_send(self._c_object,
622
data[-data_len:],
623
data_len)
624
625
def bye(self):
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
627
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
632
if result >= 0:
633
return result
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
637
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
641
while result < 0:
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
645
return result
646
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
649
650
# Functions
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
655
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
659
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
663
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
666
ctypes.c_size_t]
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
669
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
675
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
681
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
685
ctypes.c_int]
686
handshake_set_private_extensions.restype = None
687
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
690
ctypes.c_void_p]
691
credentials_set.restype = _error_code
692
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
696
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
700
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
705
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
709
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
713
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
717
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
722
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
726
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
731
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
735
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
740
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
743
744
if has_rawpk:
745
# Types
746
class pubkey_st(ctypes.Structure):
747
_fields = []
748
pubkey_t = ctypes.POINTER(pubkey_st)
749
750
x509_crt_fmt_t = ctypes.c_int
751
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
756
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
759
x509_crt_fmt_t]
760
pubkey_import.restype = _error_code
761
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
767
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
771
else:
772
# All the function declarations below are from gnutls/openpgp.h
773
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
777
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
781
openpgp_crt_fmt_t]
782
openpgp_crt_import.restype = _error_code
783
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
788
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
792
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
796
ctypes.c_void_p,
797
ctypes.POINTER(
798
ctypes.c_size_t)]
799
openpgp_crt_get_fingerprint.restype = _error_code
800
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
805
806
# Remove non-public functions
807
del _error_code, _retry_on_error
808
809
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
813
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
816
"""
817
connection.send(func(*args, **kwargs))
818
connection.close()
819
820
275
821
class Client(object):
276
822
"""A representation of a client host served by this server.
277
823
278
824
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
825
approved: bool(); 'None' if not yet approved/disapproved
280
826
approval_delay: datetime.timedelta(); Time to wait for approval
281
827
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
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
830
running.
831
checker_callback_tag: a GLib event source tag, or None
286
832
checker_command: string; External command which is run to check
287
833
if client lives. %() expansions are done at
288
834
runtime with vars(self) as dict, so that for
289
835
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
836
checker_initiator_tag: a GLib event source tag, or None
291
837
created: datetime.datetime(); (UTC) object creation
838
client_structure: Object describing what attributes a client has
839
and is used for storing the client at exit
292
840
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
841
disable_initiator_tag: a GLib event source tag, or None
295
842
enabled: bool()
296
843
fingerprint: string (40 or 32 hexadecimal digits); used to
297
uniquely identify the client
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
298
847
host: string; available for use by the checker command
299
848
interval: datetime.timedelta(); How often to start a new checker
300
849
last_approval_request: datetime.datetime(); (UTC) or None
301
850
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
851
last_checker_status: integer between 0 and 255 reflecting exit
852
status of last checker. -1 reflects crashed
853
checker, -2 means no checker completed yet.
854
last_checker_signal: The signal which killed the last checker, if
855
last_checker_status is -1
856
last_enabled: datetime.datetime(); (UTC) or None
303
857
name: string; from the config file, used in log messages and
304
858
D-Bus identifiers
305
859
secret: bytestring; sent verbatim (over TLS) to client
306
860
timeout: datetime.timedelta(); How long from last_checked_ok
307
861
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
862
extended_timeout: extra long timeout when secret has been sent
309
863
runtime_expansions: Allowed attributes for runtime expansion.
310
864
expires: datetime.datetime(); time (UTC) when a client will be
311
865
disabled, or None
866
server_settings: The server_settings dict from main()
312
867
"""
313
868
314
869
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
870
"created", "enabled", "expires", "key_id",
871
"fingerprint", "host", "interval",
872
"last_approval_request", "last_checked_ok",
317
873
"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."""
874
client_defaults = {
875
"timeout": "PT5M",
876
"extended_timeout": "PT15M",
877
"interval": "PT2M",
878
"checker": "fping -q -- %%(host)s",
879
"host": "",
880
"approval_delay": "PT0S",
881
"approval_duration": "PT1S",
882
"approved_by_default": "True",
883
"enabled": "True",
884
}
885
886
@staticmethod
887
def config_parser(config):
888
"""Construct a new dict of client settings of this form:
889
{ client_name: {setting_name: value, ...}, ...}
890
with exceptions for any special settings as defined above.
891
NOTE: Must be a pure function. Must return the same result
892
value given the same arguments.
893
"""
894
settings = {}
895
for client_name in config.sections():
896
section = dict(config.items(client_name))
897
client = settings[client_name] = {}
898
899
client["host"] = section["host"]
900
# Reformat values from string types to Python types
901
client["approved_by_default"] = config.getboolean(
902
client_name, "approved_by_default")
903
client["enabled"] = config.getboolean(client_name,
904
"enabled")
905
906
# Uppercase and remove spaces from key_id and fingerprint
907
# for later comparison purposes with return value from the
908
# key_id() and fingerprint() functions
909
client["key_id"] = (section.get("key_id", "").upper()
910
.replace(" ", ""))
911
client["fingerprint"] = (section["fingerprint"].upper()
912
.replace(" ", ""))
913
if "secret" in section:
914
client["secret"] = codecs.decode(section["secret"]
915
.encode("utf-8"),
916
"base64")
917
elif "secfile" in section:
918
with open(os.path.expanduser(os.path.expandvars
919
(section["secfile"])),
920
"rb") as secfile:
921
client["secret"] = secfile.read()
922
else:
923
raise TypeError("No secret or secfile for section {}"
924
.format(section))
925
client["timeout"] = string_to_delta(section["timeout"])
926
client["extended_timeout"] = string_to_delta(
927
section["extended_timeout"])
928
client["interval"] = string_to_delta(section["interval"])
929
client["approval_delay"] = string_to_delta(
930
section["approval_delay"])
931
client["approval_duration"] = string_to_delta(
932
section["approval_duration"])
933
client["checker_command"] = section["checker"]
934
client["last_approval_request"] = None
935
client["last_checked_ok"] = None
936
client["last_checker_status"] = -2
937
938
return settings
939
940
def __init__(self, settings, name=None, server_settings=None):
338
941
self.name = name
339
if config is None:
340
config = {}
942
if server_settings is None:
943
server_settings = {}
944
self.server_settings = server_settings
945
# adding all client settings
946
for setting, value in settings.items():
947
setattr(self, setting, value)
948
949
if self.enabled:
950
if not hasattr(self, "last_enabled"):
951
self.last_enabled = datetime.datetime.utcnow()
952
if not hasattr(self, "expires"):
953
self.expires = (datetime.datetime.utcnow()
954
+ self.timeout)
955
else:
956
self.last_enabled = None
957
self.expires = None
958
341
959
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(" ", ""))
960
logger.debug(" Key ID: %s", self.key_id)
347
961
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
962
self.created = settings.get("created",
963
datetime.datetime.utcnow())
964
965
# attributes specific for this server instance
369
966
self.checker = None
370
967
self.checker_initiator_tag = None
371
968
self.disable_initiator_tag = None
372
self.expires = None
373
969
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
970
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)
971
self.approved = None
380
972
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
973
self.changedstate = multiprocessing_manager.Condition(
974
multiprocessing_manager.Lock())
975
self.client_structure = [attr
976
for attr in self.__dict__.keys()
977
if not attr.startswith("_")]
978
self.client_structure.append("client_structure")
979
980
for name, t in inspect.getmembers(
981
type(self), lambda obj: isinstance(obj, property)):
982
if not name.startswith("_"):
983
self.client_structure.append(name)
984
985
# Send notice to process children that client state has changed
389
986
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
987
with self.changedstate:
988
self.changedstate.notify_all()
989
394
990
def enable(self):
395
991
"""Start this client's checker and timeout hooks"""
396
992
if getattr(self, "enabled", False):
397
993
# Already enabled
398
994
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
995
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
996
self.enabled = True
411
997
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
998
self.init_checker()
999
self.send_changedstate()
1000
415
1001
def disable(self, quiet=True):
416
1002
"""Disable this client."""
417
1003
if not getattr(self, "enabled", False):
418
1004
return False
419
1005
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
1006
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1007
if getattr(self, "disable_initiator_tag", None) is not None:
1008
GLib.source_remove(self.disable_initiator_tag)
425
1009
self.disable_initiator_tag = None
426
1010
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1011
if getattr(self, "checker_initiator_tag", None) is not None:
1012
GLib.source_remove(self.checker_initiator_tag)
429
1013
self.checker_initiator_tag = None
430
1014
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
1015
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
1016
if not quiet:
1017
self.send_changedstate()
1018
# Do not run this again if called by a GLib.timeout_add
435
1019
return False
436
1020
437
1021
def __del__(self):
438
self.disable_hook = None
439
1022
self.disable()
440
441
def checker_callback(self, pid, condition, command):
1023
1024
def init_checker(self):
1025
# Schedule a new checker to be started an 'interval' from now,
1026
# and every interval from then on.
1027
if self.checker_initiator_tag is not None:
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
1031
self.start_checker)
1032
# Schedule a disable() when 'timeout' has passed
1033
if self.disable_initiator_tag is not None:
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
1037
# Also start a new checker *right now*.
1038
self.start_checker()
1039
1040
def checker_callback(self, source, condition, connection,
1041
command):
442
1042
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
1045
connection.close()
1046
self.checker.join()
443
1047
self.checker_callback_tag = None
444
1048
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1049
1050
if returncode >= 0:
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
1053
if self.last_checker_status == 0:
448
1054
logger.info("Checker for %(name)s succeeded",
449
1055
vars(self))
450
1056
self.checked_ok()
451
1057
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1058
logger.info("Checker for %(name)s failed", vars(self))
454
1059
else:
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
455
1062
logger.warning("Checker for %(name)s crashed?",
456
1063
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
"""
1064
return False
1065
1066
def checked_ok(self):
1067
"""Assert that the client has been seen, alive and well."""
1068
self.last_checked_ok = datetime.datetime.utcnow()
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
1071
self.bump_timeout()
1072
1073
def bump_timeout(self, timeout=None):
1074
"""Bump up the timeout for this client."""
464
1075
if timeout is None:
465
1076
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.disable_initiator_tag = (gobject.timeout_add
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
472
1077
if self.disable_initiator_tag is not None:
1078
GLib.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1080
if getattr(self, "enabled", False):
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
1083
self.expires = datetime.datetime.utcnow() + timeout
1084
473
1085
def need_approval(self):
474
1086
self.last_approval_request = datetime.datetime.utcnow()
475
1087
476
1088
def start_checker(self):
477
1089
"""Start a new checker subprocess if one is not running.
478
1090
479
1091
If a checker already exists, leave it running and do
480
1092
nothing."""
481
1093
# 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
1094
# did that, and if a checker (for some reason) started running
1095
# slowly and taking more than 'interval' time, then the client
1096
# would inevitably timeout, since no checker would get a
1097
# chance to run to completion. If we instead leave running
486
1098
# checkers alone, the checker would have to take more time
487
1099
# than 'timeout' for the client to be disabled, which is as it
488
1100
# 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)
1101
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
1104
self.checker.join()
1105
self.checker = None
503
1106
# Start a new checker if needed
504
1107
if self.checker is None:
1108
# Escape attributes for the shell
1109
escaped_attrs = {
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
505
1112
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
1113
command = self.checker_command % escaped_attrs
1114
except TypeError as error:
1115
logger.error('Could not format string "%s"',
1116
self.checker_command,
1117
exc_info=error)
1118
return True # Try again later
524
1119
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
1120
logger.info("Starting checker %r for %s", command,
1121
self.name)
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1128
# created wnull.
1129
popen_args = {"close_fds": True,
1130
"shell": True,
1131
"cwd": "/"}
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1135
"stderr": wnull})
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1138
target=call_pipe,
1139
args=(pipe[1], subprocess.call, command),
1140
kwargs=popen_args)
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
549
1146
return True
550
1147
551
1148
def stop_checker(self):
552
1149
"""Force the checker process, if any, to stop."""
553
1150
if self.checker_callback_tag:
554
gobject.source_remove(self.checker_callback_tag)
1151
GLib.source_remove(self.checker_callback_tag)
555
1152
self.checker_callback_tag = None
556
1153
if getattr(self, "checker", None) is None:
557
1154
return
558
1155
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
1156
self.checker.terminate()
567
1157
self.checker = None
568
1158
569
1159
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1160
def dbus_service_property(dbus_interface,
1161
signature="v",
1162
access="readwrite",
1163
byte_arrays=False):
572
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1165
become properties on the D-Bus.
574
1166
575
1167
The decorated method will be called with no arguments by "Get"
576
1168
and with one argument by "Set".
577
1169
578
1170
The parameters, where they are supported, are the same as
579
1171
dbus.service.method, except there is only "signature", since the
580
1172
type from Get() and the type sent to Set() is the same.
583
1175
# "Set" method, so we fail early here:
584
1176
if byte_arrays and signature != "ay":
585
1177
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
1178
" signature {!r}".format(signature))
1179
587
1180
def decorator(func):
588
1181
func._dbus_is_property = True
589
1182
func._dbus_interface = dbus_interface
592
1185
func._dbus_name = func.__name__
593
1186
if func._dbus_name.endswith("_dbus_property"):
594
1187
func._dbus_name = func._dbus_name[:-14]
595
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
return func
1188
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1189
return func
1190
1191
return decorator
1192
1193
1194
def dbus_interface_annotations(dbus_interface):
1195
"""Decorator for marking functions returning interface annotations
1196
1197
Usage:
1198
1199
@dbus_interface_annotations("org.example.Interface")
1200
def _foo(self): # Function name does not matter
1201
return {"org.freedesktop.DBus.Deprecated": "true",
1202
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1203
"false"}
1204
"""
1205
1206
def decorator(func):
1207
func._dbus_is_interface = True
1208
func._dbus_interface = dbus_interface
1209
func._dbus_name = dbus_interface
1210
return func
1211
1212
return decorator
1213
1214
1215
def dbus_annotations(annotations):
1216
"""Decorator to annotate D-Bus methods, signals or properties
1217
Usage:
1218
1219
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1220
"org.freedesktop.DBus.Property."
1221
"EmitsChangedSignal": "false"})
1222
@dbus_service_property("org.example.Interface", signature="b",
1223
access="r")
1224
def Property_dbus_property(self):
1225
return dbus.Boolean(False)
1226
1227
See also the DBusObjectWithAnnotations class.
1228
"""
1229
1230
def decorator(func):
1231
func._dbus_annotations = annotations
1232
return func
1233
597
1234
return decorator
598
1235
599
1236
600
1237
class DBusPropertyException(dbus.exceptions.DBusException):
601
1238
"""A base class for D-Bus property-related exceptions
602
1239
"""
603
def __unicode__(self):
604
return unicode(str(self))
1240
pass
605
1241
606
1242
607
1243
class DBusPropertyAccessException(DBusPropertyException):
616
1252
pass
617
1253
618
1254
619
class DBusObjectWithProperties(dbus.service.Object):
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1257
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
1260
"""
1261
1262
@staticmethod
1263
def _is_dbus_thing(thing):
1264
"""Returns a function testing if an attribute is a D-Bus thing
1265
1266
If called like _is_dbus_thing("method") it returns a function
1267
suitable for use as predicate to inspect.getmembers().
1268
"""
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1270
False)
1271
1272
def _get_all_dbus_things(self, thing):
1273
"""Returns a generator of (name, attribute) pairs
1274
"""
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
1276
athing.__get__(self))
1277
for cls in self.__class__.__mro__
1278
for name, athing in
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1280
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1282
out_signature="s",
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1287
1288
Inserts annotation tags on methods and signals.
1289
"""
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1291
connection)
1292
try:
1293
document = xml.dom.minidom.parseString(xmlstring)
1294
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1299
annots = dict()
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1309
"annotation")
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1320
)).items():
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1332
== "out"):
1333
arg.setAttribute("name",
1334
"xml_data")
1335
xmlstring = document.toxml("utf-8")
1336
document.unlink()
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1340
exc_info=error)
1341
return xmlstring
1342
1343
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
620
1345
"""A D-Bus object with properties.
621
1346
622
1347
Classes inheriting from this can use the dbus_service_property
623
1348
decorator to expose methods as D-Bus properties. It exposes the
624
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
1350
"""
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
1351
639
1352
def _get_dbus_property(self, interface_name, property_name):
640
1353
"""Returns a bound method if one exists which is a D-Bus
641
1354
property with the specified name and interface.
642
1355
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
646
1359
if (value._dbus_name == property_name
647
1360
and value._dbus_interface == interface_name):
648
1361
return value.__get__(self)
649
1362
650
1363
# 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",
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1366
1367
@classmethod
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1373
for attr in dir(x))
1374
if name is not None)
1375
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
1377
in_signature="ss",
656
1378
out_signature="v")
657
1379
def Get(self, interface_name, property_name):
658
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
664
1386
if not hasattr(value, "variant_level"):
665
1387
return value
666
1388
return type(value)(value, variant_level=value.variant_level+1)
667
1389
668
1390
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
669
1391
def Set(self, interface_name, property_name, value):
670
1392
"""Standard D-Bus property Set() method, see D-Bus standard.
676
1398
# The byte_arrays option is not supported yet on
677
1399
# signatures other than "ay".
678
1400
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
1401
raise ValueError("Byte arrays not supported for non-"
1402
"'ay' signature {!r}"
1403
.format(prop._dbus_signature))
1404
value = dbus.ByteArray(b''.join(chr(byte)
1405
for byte in value))
682
1406
prop(value)
683
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1407
1408
@dbus.service.method(dbus.PROPERTIES_IFACE,
1409
in_signature="s",
685
1410
out_signature="a{sv}")
686
1411
def GetAll(self, interface_name):
687
1412
"""Standard D-Bus property GetAll() method, see D-Bus
688
1413
standard.
689
1414
690
1415
Note: Will not include properties with access="write".
691
1416
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
1417
properties = {}
1418
for name, prop in self._get_all_dbus_things("property"):
694
1419
if (interface_name
695
1420
and interface_name != prop._dbus_interface):
696
1421
# Interface non-empty but did not match
700
1425
continue
701
1426
value = prop()
702
1427
if not hasattr(value, "variant_level"):
703
all[name] = value
1428
properties[name] = value
704
1429
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
708
1430
properties[name] = type(value)(
1431
value, variant_level=value.variant_level + 1)
1432
return dbus.Dictionary(properties, signature="sv")
1433
1434
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1435
def PropertiesChanged(self, interface_name, changed_properties,
1436
invalidated_properties):
1437
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1438
standard.
1439
"""
1440
pass
1441
709
1442
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
1443
out_signature="s",
711
1444
path_keyword='object_path',
712
1445
connection_keyword='connection')
713
1446
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
1447
"""Overloading of standard D-Bus method.
1448
1449
Inserts property tags and interface annotation tags.
715
1450
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
1451
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1452
object_path,
1453
connection)
718
1454
try:
719
1455
document = xml.dom.minidom.parseString(xmlstring)
1456
720
1457
def make_tag(document, name, prop):
721
1458
e = document.createElement("property")
722
1459
e.setAttribute("name", name)
723
1460
e.setAttribute("type", prop._dbus_signature)
724
1461
e.setAttribute("access", prop._dbus_access)
725
1462
return e
1463
726
1464
for if_tag in document.getElementsByTagName("interface"):
1465
# Add property tags
727
1466
for tag in (make_tag(document, name, prop)
728
1467
for name, prop
729
in self._get_all_dbus_properties()
1468
in self._get_all_dbus_things("property")
730
1469
if prop._dbus_interface
731
1470
== if_tag.getAttribute("name")):
732
1471
if_tag.appendChild(tag)
1472
# Add annotation tags for properties
1473
for tag in if_tag.getElementsByTagName("property"):
1474
annots = dict()
1475
for name, prop in self._get_all_dbus_things(
1476
"property"):
1477
if (name == tag.getAttribute("name")
1478
and prop._dbus_interface
1479
== if_tag.getAttribute("name")):
1480
annots.update(getattr(
1481
prop, "_dbus_annotations", {}))
1482
for name, value in annots.items():
1483
ann_tag = document.createElement(
1484
"annotation")
1485
ann_tag.setAttribute("name", name)
1486
ann_tag.setAttribute("value", value)
1487
tag.appendChild(ann_tag)
733
1488
# Add the names to the return values for the
734
1489
# "org.freedesktop.DBus.Properties" methods
735
1490
if (if_tag.getAttribute("name")
750
1505
except (AttributeError, xml.dom.DOMException,
751
1506
xml.parsers.expat.ExpatError) as error:
752
1507
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
def datetime_to_dbus (dt, variant_level=0):
1508
exc_info=error)
1509
return xmlstring
1510
1511
1512
try:
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1516
1517
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1520
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1525
1526
Note: No signals are sent automatically; they must be sent
1527
manually.
1528
"""
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1538
pass
1539
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1542
pass
1543
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1545
out_signature="s",
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1550
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1553
"""
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1555
object_path,
1556
connection)
1557
try:
1558
document = xml.dom.minidom.parseString(xmlstring)
1559
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1569
== "out"):
1570
arg.setAttribute(
1571
"name",
1572
"objpath_interfaces"
1573
"_and_properties")
1574
xmlstring = document.toxml("utf-8")
1575
document.unlink()
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1579
exc_info=error)
1580
return xmlstring
1581
1582
1583
def datetime_to_dbus(dt, variant_level=0):
758
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1585
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.
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1588
1589
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1591
"""A class decorator; applied to a subclass of
1592
dbus.service.Object, it will add alternate D-Bus attributes with
1593
interface names according to the "alt_interface_names" mapping.
1594
Usage:
1595
1596
@alternate_dbus_interfaces({"org.example.Interface":
1597
"net.example.AlternateInterface"})
1598
class SampleDBusObject(dbus.service.Object):
1599
@dbus.service.method("org.example.Interface")
1600
def SampleDBusMethod():
1601
pass
1602
1603
The above "SampleDBusMethod" on "SampleDBusObject" will be
1604
reachable via two interfaces: "org.example.Interface" and
1605
"net.example.AlternateInterface", the latter of which will have
1606
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1607
"true", unless "deprecate" is passed with a False value.
1608
1609
This works for methods and signals, and also for D-Bus properties
1610
(from DBusObjectWithProperties) and interfaces (from the
1611
dbus_interface_annotations decorator).
768
1612
"""
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):
1613
1614
def wrapper(cls):
1615
for orig_interface_name, alt_interface_name in (
1616
alt_interface_names.items()):
1617
attr = {}
1618
interface_names = set()
1619
# Go though all attributes of the class
1620
for attrname, attribute in inspect.getmembers(cls):
776
1621
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1622
# with the wrong interface name
778
1623
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1624
or not attribute._dbus_interface.startswith(
1625
orig_interface_name)):
781
1626
continue
782
1627
# Create an alternate D-Bus interface name based on
783
1628
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1629
alt_interface = attribute._dbus_interface.replace(
1630
orig_interface_name, alt_interface_name)
1631
interface_names.add(alt_interface)
787
1632
# Is this a D-Bus signal?
788
1633
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
nonmethod_func = (dict(
1634
# Extract the original non-method undecorated
1635
# function by black magic
1636
if sys.version_info.major == 2:
1637
nonmethod_func = (dict(
792
1638
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
else:
1642
nonmethod_func = (dict(
1643
zip(attribute.__code__.co_freevars,
1644
attribute.__closure__))
1645
["func"].cell_contents)
795
1646
# Create a new, but exactly alike, function
796
1647
# object, and decorate it to be a new D-Bus signal
797
1648
# 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)))
1649
new_function = copy_function(nonmethod_func)
1650
new_function = (dbus.service.signal(
1651
alt_interface,
1652
attribute._dbus_signature)(new_function))
1653
# Copy annotations, if any
1654
try:
1655
new_function._dbus_annotations = dict(
1656
attribute._dbus_annotations)
1657
except AttributeError:
1658
pass
1659
807
1660
# 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
1661
# original and alternate functions, so both the
1662
# original and alternate signals gets sent when
1663
# the function is called
810
1664
def fixscope(func1, func2):
811
1665
"""This function is a scope container to pass
812
1666
func1 and func2 to the "call_both" function
813
1667
outside of its arguments"""
1668
1669
@functools.wraps(func2)
814
1670
def call_both(*args, **kwargs):
815
1671
"""This function will emit two D-Bus
816
1672
signals by calling func1 and func2"""
817
1673
func1(*args, **kwargs)
818
1674
func2(*args, **kwargs)
1675
# Make wrapper function look like a D-Bus
1676
# signal
1677
for name, attr in inspect.getmembers(func2):
1678
if name.startswith("_dbus_"):
1679
setattr(call_both, name, attr)
1680
819
1681
return call_both
820
1682
# Create the "call_both" function and add it to
821
1683
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1684
attr[attrname] = fixscope(attribute, new_function)
824
1685
# Is this a D-Bus method?
825
1686
elif getattr(attribute, "_dbus_is_method", False):
826
1687
# Create a new, but exactly alike, function
827
1688
# object. Decorate it to be a new D-Bus method
828
1689
# with the alternate D-Bus interface name. Add it
829
1690
# 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)))
1691
attr[attrname] = (
1692
dbus.service.method(
1693
alt_interface,
1694
attribute._dbus_in_signature,
1695
attribute._dbus_out_signature)
1696
(copy_function(attribute)))
1697
# Copy annotations, if any
1698
try:
1699
attr[attrname]._dbus_annotations = dict(
1700
attribute._dbus_annotations)
1701
except AttributeError:
1702
pass
840
1703
# Is this a D-Bus property?
841
1704
elif getattr(attribute, "_dbus_is_property", False):
842
1705
# Create a new, but exactly alike, function
843
1706
# object, and decorate it to be a new D-Bus
844
1707
# property with the alternate D-Bus interface
845
1708
# 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
1709
attr[attrname] = (dbus_service_property(
1710
alt_interface, attribute._dbus_signature,
1711
attribute._dbus_access,
1712
attribute._dbus_get_args_options
1713
["byte_arrays"])
1714
(copy_function(attribute)))
1715
# Copy annotations, if any
1716
try:
1717
attr[attrname]._dbus_annotations = dict(
1718
attribute._dbus_annotations)
1719
except AttributeError:
1720
pass
1721
# Is this a D-Bus interface?
1722
elif getattr(attribute, "_dbus_is_interface", False):
1723
# Create a new, but exactly alike, function
1724
# object. Decorate it to be a new D-Bus interface
1725
# with the alternate D-Bus interface name. Add it
1726
# to the class.
1727
attr[attrname] = (
1728
dbus_interface_annotations(alt_interface)
1729
(copy_function(attribute)))
1730
if deprecate:
1731
# Deprecate all alternate interfaces
1732
iname = "_AlternateDBusNames_interface_annotation{}"
1733
for interface_name in interface_names:
1734
1735
@dbus_interface_annotations(interface_name)
1736
def func(self):
1737
return {"org.freedesktop.DBus.Deprecated":
1738
"true"}
1739
# Find an unused name
1740
for aname in (iname.format(i)
1741
for i in itertools.count()):
1742
if aname not in attr:
1743
attr[aname] = func
1744
break
1745
if interface_names:
1746
# Replace the class with a new subclass of it with
1747
# methods, signals, etc. as created above.
1748
if sys.version_info.major == 2:
1749
cls = type(b"{}Alternate".format(cls.__name__),
1750
(cls, ), attr)
1751
else:
1752
cls = type("{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
return cls
1755
1756
return wrapper
1757
1758
1759
@alternate_dbus_interfaces({"se.recompile.Mandos":
1760
"se.bsnet.fukt.Mandos"})
861
1761
class ClientDBus(Client, DBusObjectWithProperties):
862
1762
"""A Client class using D-Bus
863
1763
864
1764
Attributes:
865
1765
dbus_object_path: dbus.ObjectPath
866
1766
bus: dbus.SystemBus()
867
1767
"""
868
1768
869
1769
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
871
1770
+ ("dbus_object_path", ))
1771
1772
_interface = "se.recompile.Mandos.Client"
1773
872
1774
# 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
1775
1776
def __init__(self, bus=None, *args, **kwargs):
876
1777
self.bus = bus
877
1778
Client.__init__(self, *args, **kwargs)
878
1779
# Only now, when this client is initialized, can it show up on
879
1780
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1781
client_object_name = str(self.name).translate(
881
1782
{ord("."): ord("_"),
882
1783
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1784
self.dbus_object_path = dbus.ObjectPath(
1785
"/clients/" + client_object_name)
885
1786
DBusObjectWithProperties.__init__(self, self.bus,
886
1787
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
variant_level=1):
1788
1789
def notifychangeproperty(transform_func, dbus_name,
1790
type_func=lambda x: x,
1791
variant_level=1,
1792
invalidate_only=False,
1793
_interface=_interface):
891
1794
""" Modify a variable so that it's a property which announces
892
1795
its changes to DBus.
893
1796
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1797
transform_fun: Function that takes a value and a variant_level
1798
and transforms it to a D-Bus type.
896
1799
dbus_name: D-Bus name of the variable
897
1800
type_func: Function that transform the value before sending it
898
1801
to the D-Bus. Default: no transform
899
1802
variant_level: D-Bus variant level. Default: 1
900
1803
"""
901
attrname = "_{0}".format(dbus_name)
1804
attrname = "_{}".format(dbus_name)
1805
902
1806
def setter(self, value):
903
1807
if hasattr(self, "dbus_object_path"):
904
1808
if (not hasattr(self, attrname) or
905
1809
type_func(getattr(self, attrname, None))
906
1810
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
dbus_value)
1811
if invalidate_only:
1812
self.PropertiesChanged(
1813
_interface, dbus.Dictionary(),
1814
dbus.Array((dbus_name, )))
1815
else:
1816
dbus_value = transform_func(
1817
type_func(value),
1818
variant_level=variant_level)
1819
self.PropertyChanged(dbus.String(dbus_name),
1820
dbus_value)
1821
self.PropertiesChanged(
1822
_interface,
1823
dbus.Dictionary({dbus.String(dbus_name):
1824
dbus_value}),
1825
dbus.Array())
911
1826
setattr(self, attrname, value)
912
1827
913
1828
return property(lambda self: getattr(self, attrname), setter)
914
915
1829
916
1830
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1831
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1832
"ApprovalPending",
919
type_func = bool)
1833
type_func=bool)
920
1834
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1835
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1836
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1837
checker = notifychangeproperty(
1838
dbus.Boolean, "CheckerRunning",
1839
type_func=lambda checker: checker is not None)
926
1840
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1841
"LastCheckedOK")
1842
last_checker_status = notifychangeproperty(dbus.Int16,
1843
"LastCheckerStatus")
928
1844
last_approval_request = notifychangeproperty(
929
1845
datetime_to_dbus, "LastApprovalRequest")
930
1846
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1847
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1848
approval_delay = notifychangeproperty(
1849
dbus.UInt64, "ApprovalDelay",
1850
type_func=lambda td: td.total_seconds() * 1000)
936
1851
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1852
dbus.UInt64, "ApprovalDuration",
1853
type_func=lambda td: td.total_seconds() * 1000)
939
1854
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1855
timeout = notifychangeproperty(
1856
dbus.UInt64, "Timeout",
1857
type_func=lambda td: td.total_seconds() * 1000)
943
1858
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)
1859
dbus.UInt64, "ExtendedTimeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
1861
interval = notifychangeproperty(
1862
dbus.UInt64, "Interval",
1863
type_func=lambda td: td.total_seconds() * 1000)
950
1864
checker_command = notifychangeproperty(dbus.String, "Checker")
951
1865
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1866
invalidate_only=True)
1867
952
1868
del notifychangeproperty
953
1869
954
1870
def __del__(self, *args, **kwargs):
955
1871
try:
956
1872
self.remove_from_connection()
959
1875
if hasattr(DBusObjectWithProperties, "__del__"):
960
1876
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1877
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)
1878
1879
def checker_callback(self, source, condition,
1880
connection, command, *args, **kwargs):
1881
ret = Client.checker_callback(self, source, condition,
1882
connection, command, *args,
1883
**kwargs)
1884
exitstatus = self.last_checker_status
1885
if exitstatus >= 0:
969
1886
# Emit D-Bus signal
970
1887
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1888
# This is specific to GNU libC
1889
dbus.Int64(exitstatus << 8),
972
1890
dbus.String(command))
973
1891
else:
974
1892
# Emit D-Bus signal
975
1893
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1894
dbus.Int64(
1895
# This is specific to GNU libC
1896
(exitstatus << 8)
1897
| self.last_checker_signal),
977
1898
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
981
1899
return ret
1900
982
1901
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
1902
old_checker_pid = getattr(self.checker, "pid", None)
988
1903
r = Client.start_checker(self, *args, **kwargs)
989
1904
# Only if new checker process was started
990
1905
if (self.checker is not None
992
1907
# Emit D-Bus signal
993
1908
self.CheckerStarted(self.current_checker_command)
994
1909
return r
995
1910
996
1911
def _reset_approved(self):
997
self._approved = None
1912
self.approved = None
998
1913
return False
999
1914
1000
1915
def approve(self, value=True):
1916
self.approved = value
1917
GLib.timeout_add(int(self.approval_duration.total_seconds()
1918
* 1000), self._reset_approved)
1001
1919
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
1920
1921
# D-Bus methods, signals & properties
1922
1923
# Interfaces
1924
1925
# Signals
1926
1013
1927
# CheckerCompleted - signal
1014
1928
@dbus.service.signal(_interface, signature="nxs")
1015
1929
def CheckerCompleted(self, exitcode, waitstatus, command):
1016
1930
"D-Bus signal"
1017
1931
pass
1018
1932
1019
1933
# CheckerStarted - signal
1020
1934
@dbus.service.signal(_interface, signature="s")
1021
1935
def CheckerStarted(self, command):
1022
1936
"D-Bus signal"
1023
1937
pass
1024
1938
1025
1939
# PropertyChanged - signal
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1941
@dbus.service.signal(_interface, signature="sv")
1027
1942
def PropertyChanged(self, property, value):
1028
1943
"D-Bus signal"
1029
1944
pass
1030
1945
1031
1946
# GotSecret - signal
1032
1947
@dbus.service.signal(_interface)
1033
1948
def GotSecret(self):
1036
1951
server to mandos-client
1037
1952
"""
1038
1953
pass
1039
1954
1040
1955
# Rejected - signal
1041
1956
@dbus.service.signal(_interface, signature="s")
1042
1957
def Rejected(self, reason):
1043
1958
"D-Bus signal"
1044
1959
pass
1045
1960
1046
1961
# NeedApproval - signal
1047
1962
@dbus.service.signal(_interface, signature="tb")
1048
1963
def NeedApproval(self, timeout, default):
1049
1964
"D-Bus signal"
1050
1965
return self.need_approval()
1051
1052
## Methods
1053
1966
1967
# Methods
1968
1054
1969
# Approve - method
1055
1970
@dbus.service.method(_interface, in_signature="b")
1056
1971
def Approve(self, value):
1057
1972
self.approve(value)
1058
1973
1059
1974
# CheckedOK - method
1060
1975
@dbus.service.method(_interface)
1061
1976
def CheckedOK(self):
1062
1977
self.checked_ok()
1063
1978
1064
1979
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1065
1981
@dbus.service.method(_interface)
1066
1982
def Enable(self):
1067
1983
"D-Bus method"
1068
1984
self.enable()
1069
1985
1070
1986
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1071
1988
@dbus.service.method(_interface)
1072
1989
def StartChecker(self):
1073
1990
"D-Bus method"
1074
1991
self.start_checker()
1075
1992
1076
1993
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1077
1995
@dbus.service.method(_interface)
1078
1996
def Disable(self):
1079
1997
"D-Bus method"
1080
1998
self.disable()
1081
1999
1082
2000
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1083
2002
@dbus.service.method(_interface)
1084
2003
def StopChecker(self):
1085
2004
self.stop_checker()
1086
1087
## Properties
1088
2005
2006
# Properties
2007
1089
2008
# ApprovalPending - property
1090
2009
@dbus_service_property(_interface, signature="b", access="read")
1091
2010
def ApprovalPending_dbus_property(self):
1092
2011
return dbus.Boolean(bool(self.approvals_pending))
1093
2012
1094
2013
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
2014
@dbus_service_property(_interface,
2015
signature="b",
1096
2016
access="readwrite")
1097
2017
def ApprovedByDefault_dbus_property(self, value=None):
1098
2018
if value is None: # get
1099
2019
return dbus.Boolean(self.approved_by_default)
1100
2020
self.approved_by_default = bool(value)
1101
2021
1102
2022
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
2023
@dbus_service_property(_interface,
2024
signature="t",
1104
2025
access="readwrite")
1105
2026
def ApprovalDelay_dbus_property(self, value=None):
1106
2027
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
2028
return dbus.UInt64(self.approval_delay.total_seconds()
2029
* 1000)
1108
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
2031
1110
2032
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
2034
signature="t",
1112
2035
access="readwrite")
1113
2036
def ApprovalDuration_dbus_property(self, value=None):
1114
2037
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
2038
return dbus.UInt64(self.approval_duration.total_seconds()
2039
* 1000)
1117
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
2041
1119
2042
# Name - property
2043
@dbus_annotations(
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1120
2045
@dbus_service_property(_interface, signature="s", access="read")
1121
2046
def Name_dbus_property(self):
1122
2047
return dbus.String(self.name)
1123
2048
2049
# KeyID - property
2050
@dbus_annotations(
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
2055
1124
2056
# Fingerprint - property
2057
@dbus_annotations(
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1125
2059
@dbus_service_property(_interface, signature="s", access="read")
1126
2060
def Fingerprint_dbus_property(self):
1127
2061
return dbus.String(self.fingerprint)
1128
2062
1129
2063
# Host - property
1130
@dbus_service_property(_interface, signature="s",
2064
@dbus_service_property(_interface,
2065
signature="s",
1131
2066
access="readwrite")
1132
2067
def Host_dbus_property(self, value=None):
1133
2068
if value is None: # get
1134
2069
return dbus.String(self.host)
1135
self.host = value
1136
2070
self.host = str(value)
2071
1137
2072
# Created - property
2073
@dbus_annotations(
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1138
2075
@dbus_service_property(_interface, signature="s", access="read")
1139
2076
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1141
2077
return datetime_to_dbus(self.created)
2078
1142
2079
# LastEnabled - property
1143
2080
@dbus_service_property(_interface, signature="s", access="read")
1144
2081
def LastEnabled_dbus_property(self):
1145
2082
return datetime_to_dbus(self.last_enabled)
1146
2083
1147
2084
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
2085
@dbus_service_property(_interface,
2086
signature="b",
1149
2087
access="readwrite")
1150
2088
def Enabled_dbus_property(self, value=None):
1151
2089
if value is None: # get
1154
2092
self.enable()
1155
2093
else:
1156
2094
self.disable()
1157
2095
1158
2096
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
2097
@dbus_service_property(_interface,
2098
signature="s",
1160
2099
access="readwrite")
1161
2100
def LastCheckedOK_dbus_property(self, value=None):
1162
2101
if value is not None:
1163
2102
self.checked_ok()
1164
2103
return
1165
2104
return datetime_to_dbus(self.last_checked_ok)
1166
2105
2106
# LastCheckerStatus - property
2107
@dbus_service_property(_interface, signature="n", access="read")
2108
def LastCheckerStatus_dbus_property(self):
2109
return dbus.Int16(self.last_checker_status)
2110
1167
2111
# Expires - property
1168
2112
@dbus_service_property(_interface, signature="s", access="read")
1169
2113
def Expires_dbus_property(self):
1170
2114
return datetime_to_dbus(self.expires)
1171
2115
1172
2116
# LastApprovalRequest - property
1173
2117
@dbus_service_property(_interface, signature="s", access="read")
1174
2118
def LastApprovalRequest_dbus_property(self):
1175
2119
return datetime_to_dbus(self.last_approval_request)
1176
2120
1177
2121
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
2122
@dbus_service_property(_interface,
2123
signature="t",
1179
2124
access="readwrite")
1180
2125
def Timeout_dbus_property(self, value=None):
1181
2126
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
2127
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2128
old_timeout = self.timeout
1183
2129
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
2130
# Reschedule disabling
2131
if self.enabled:
2132
now = datetime.datetime.utcnow()
2133
self.expires += self.timeout - old_timeout
2134
if self.expires <= now:
2135
# The timeout has passed
2136
self.disable()
2137
else:
2138
if (getattr(self, "disable_initiator_tag", None)
2139
is None):
2140
return
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
2144
self.disable)
2145
1206
2146
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
2147
@dbus_service_property(_interface,
2148
signature="t",
1208
2149
access="readwrite")
1209
2150
def ExtendedTimeout_dbus_property(self, value=None):
1210
2151
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
2153
* 1000)
1212
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
2155
1214
2156
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
2157
@dbus_service_property(_interface,
2158
signature="t",
1216
2159
access="readwrite")
1217
2160
def Interval_dbus_property(self, value=None):
1218
2161
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
2163
self.interval = datetime.timedelta(0, 0, 0, value)
1221
2164
if getattr(self, "checker_initiator_tag", None) is None:
1222
2165
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
2166
if self.enabled:
2167
# Reschedule checker run
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
2172
1229
2173
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
2174
@dbus_service_property(_interface,
2175
signature="s",
1231
2176
access="readwrite")
1232
2177
def Checker_dbus_property(self, value=None):
1233
2178
if value is None: # get
1234
2179
return dbus.String(self.checker_command)
1235
self.checker_command = value
1236
2180
self.checker_command = str(value)
2181
1237
2182
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
2183
@dbus_service_property(_interface,
2184
signature="b",
1239
2185
access="readwrite")
1240
2186
def CheckerRunning_dbus_property(self, value=None):
1241
2187
if value is None: # get
1244
2190
self.start_checker()
1245
2191
else:
1246
2192
self.stop_checker()
1247
2193
1248
2194
# ObjectPath - property
2195
@dbus_annotations(
2196
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2197
"org.freedesktop.DBus.Deprecated": "true"})
1249
2198
@dbus_service_property(_interface, signature="o", access="read")
1250
2199
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
1252
2200
return self.dbus_object_path # is already a dbus.ObjectPath
2201
1253
2202
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2203
@dbus_annotations(
2204
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2205
"invalidates"})
2206
@dbus_service_property(_interface,
2207
signature="ay",
2208
access="write",
2209
byte_arrays=True)
1256
2210
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
1258
2211
self.secret = bytes(value)
2212
1259
2213
del _interface
1260
2214
1261
2215
1262
2216
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
2217
def __init__(self, child_pipe, key_id, fpr, address):
1264
2218
self._pipe = child_pipe
1265
self._pipe.send(('init', fpr, address))
2219
self._pipe.send(('init', key_id, fpr, address))
1266
2220
if not self._pipe.recv():
1267
raise KeyError()
1268
2221
raise KeyError(key_id or fpr)
2222
1269
2223
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2224
if name == '_pipe':
1271
2225
return super(ProxyClient, self).__getattribute__(name)
1272
2226
self._pipe.send(('getattr', name))
1273
2227
data = self._pipe.recv()
1274
2228
if data[0] == 'data':
1275
2229
return data[1]
1276
2230
if data[0] == 'function':
2231
1277
2232
def func(*args, **kwargs):
1278
2233
self._pipe.send(('funcall', name, args, kwargs))
1279
2234
return self._pipe.recv()[1]
2235
1280
2236
return func
1281
2237
1282
2238
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2239
if name == '_pipe':
1284
2240
return super(ProxyClient, self).__setattr__(name, value)
1285
2241
self._pipe.send(('setattr', name, value))
1286
2242
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
2243
1290
2244
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2245
"""A class to handle client connections.
1292
2246
1293
2247
Instantiated once for each connection to handle it.
1294
2248
Note: This will run in its own forked process."""
1295
2249
1296
2250
def handle(self):
1297
2251
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2252
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2253
str(self.client_address))
1300
2254
logger.debug("Pipe FD: %d",
1301
2255
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"))
2256
2257
session = gnutls.ClientSession(self.request)
2258
2259
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2260
# "+AES-256-CBC", "+SHA1",
2261
# "+COMP-NULL", "+CTYPE-OPENPGP",
2262
# "+DHE-DSS"))
1317
2263
# Use a fallback default, since this MUST be set.
1318
2264
priority = self.server.gnutls_priority
1319
2265
if priority is None:
1320
2266
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1324
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
2269
None)
2270
1325
2271
# Start communication using the Mandos protocol
1326
2272
# Get protocol number
1327
2273
line = self.request.makefile().readline()
1328
2274
logger.debug("Protocol version: %r", line)
1329
2275
try:
1330
2276
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
2277
raise RuntimeError(line)
1332
2278
except (ValueError, IndexError, RuntimeError) as error:
1333
2279
logger.error("Unknown protocol version: %s", error)
1334
2280
return
1335
2281
1336
2282
# Start GnuTLS connection
1337
2283
try:
1338
2284
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2285
except gnutls.Error as error:
1340
2286
logger.warning("Handshake failed: %s", error)
1341
2287
# Do not run session.bye() here: the session is not
1342
2288
# established. Just abandon the request.
1343
2289
return
1344
2290
logger.debug("Handshake succeeded")
1345
2291
1346
2292
approval_required = False
1347
2293
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,
2294
if gnutls.has_rawpk:
2295
fpr = b""
2296
try:
2297
key_id = self.key_id(
2298
self.peer_certificate(session))
2299
except (TypeError, gnutls.Error) as error:
2300
logger.warning("Bad certificate: %s", error)
2301
return
2302
logger.debug("Key ID: %s", key_id)
2303
2304
else:
2305
key_id = b""
2306
try:
2307
fpr = self.fingerprint(
2308
self.peer_certificate(session))
2309
except (TypeError, gnutls.Error) as error:
2310
logger.warning("Bad certificate: %s", error)
2311
return
2312
logger.debug("Fingerprint: %s", fpr)
2313
2314
try:
2315
client = ProxyClient(child_pipe, key_id, fpr,
1359
2316
self.client_address)
1360
2317
except KeyError:
1361
2318
return
1362
2319
1363
2320
if client.approval_delay:
1364
2321
delay = client.approval_delay
1365
2322
client.approvals_pending += 1
1366
2323
approval_required = True
1367
2324
1368
2325
while True:
1369
2326
if not client.enabled:
1370
2327
logger.info("Client %s is disabled",
1371
client.name)
2328
client.name)
1372
2329
if self.server.use_dbus:
1373
2330
# Emit D-Bus signal
1374
2331
client.Rejected("Disabled")
1375
2332
return
1376
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2333
2334
if client.approved or not client.approval_delay:
2335
# We are approved or approval is disabled
1379
2336
break
1380
elif client._approved is None:
2337
elif client.approved is None:
1381
2338
logger.info("Client %s needs approval",
1382
2339
client.name)
1383
2340
if self.server.use_dbus:
1384
2341
# Emit D-Bus signal
1385
2342
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2343
client.approval_delay.total_seconds()
2344
* 1000, client.approved_by_default)
1388
2345
else:
1389
2346
logger.warning("Client %s was not approved",
1390
2347
client.name)
1392
2349
# Emit D-Bus signal
1393
2350
client.Rejected("Denied")
1394
2351
return
1395
1396
#wait until timeout or approved
2352
2353
# wait until timeout or approved
1397
2354
time = datetime.datetime.now()
1398
2355
client.changedstate.acquire()
1399
(client.changedstate.wait
1400
(float(client._timedelta_to_milliseconds(delay)
1401
/ 1000)))
2356
client.changedstate.wait(delay.total_seconds())
1402
2357
client.changedstate.release()
1403
2358
time2 = datetime.datetime.now()
1404
2359
if (time2 - time) >= delay:
1414
2369
break
1415
2370
else:
1416
2371
delay -= time2 - time
1417
1418
sent_size = 0
1419
while sent_size < len(client.secret):
1420
try:
1421
sent = session.send(client.secret[sent_size:])
1422
except gnutls.errors.GNUTLSError as error:
1423
logger.warning("gnutls send failed")
1424
return
1425
logger.debug("Sent: %d, remaining: %d",
1426
sent, len(client.secret)
1427
- (sent_size + sent))
1428
sent_size += sent
1429
2372
2373
try:
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
2377
exc_info=error)
2378
return
2379
1430
2380
logger.info("Sending secret to %s", client.name)
1431
# bump the timeout as if seen
1432
client.checked_ok(client.extended_timeout)
2381
# bump the timeout using extended_timeout
2382
client.bump_timeout(client.extended_timeout)
1433
2383
if self.server.use_dbus:
1434
2384
# Emit D-Bus signal
1435
2385
client.GotSecret()
1436
2386
1437
2387
finally:
1438
2388
if approval_required:
1439
2389
client.approvals_pending -= 1
1440
2390
try:
1441
2391
session.bye()
1442
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("GnuTLS bye failed")
1444
2392
except gnutls.Error as error:
2393
logger.warning("GnuTLS bye failed",
2394
exc_info=error)
2395
1445
2396
@staticmethod
1446
2397
def peer_certificate(session):
1447
"Return the peer's OpenPGP certificate as a bytestring"
1448
# If not an OpenPGP certificate...
1449
if (gnutls.library.functions
1450
.gnutls_certificate_type_get(session._c_object)
1451
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1452
# ...do the normal thing
1453
return session.peer_certificate
2398
"Return the peer's certificate as a bytestring"
2399
try:
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2401
gnutls.CTYPE_PEERS)
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2406
else:
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2411
valid_cert_types)
2412
# ...return invalid data
2413
return b""
1454
2414
list_size = ctypes.c_uint(1)
1455
cert_list = (gnutls.library.functions
1456
.gnutls_certificate_get_peers
2415
cert_list = (gnutls.certificate_get_peers
1457
2416
(session._c_object, ctypes.byref(list_size)))
1458
2417
if not bool(cert_list) and list_size.value != 0:
1459
raise gnutls.errors.GNUTLSError("error getting peer"
1460
" certificate")
2418
raise gnutls.Error("error getting peer certificate")
1461
2419
if list_size.value == 0:
1462
2420
return None
1463
2421
cert = cert_list[0]
1464
2422
return ctypes.string_at(cert.data, cert.size)
1465
2423
2424
@staticmethod
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2451
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
2456
return hex_key_id
2457
1466
2458
@staticmethod
1467
2459
def fingerprint(openpgp):
1468
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1469
2461
# New GnuTLS "datum" with the OpenPGP public key
1470
datum = (gnutls.library.types
1471
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1472
ctypes.POINTER
1473
(ctypes.c_ubyte)),
1474
ctypes.c_uint(len(openpgp))))
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1475
2466
# New empty GnuTLS certificate
1476
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1477
(gnutls.library.functions
1478
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1479
2469
# Import the OpenPGP public key into the certificate
1480
(gnutls.library.functions
1481
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1482
gnutls.library.constants
1483
.GNUTLS_OPENPGP_FMT_RAW))
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1484
2472
# Verify the self signature in the key
1485
2473
crtverify = ctypes.c_uint()
1486
(gnutls.library.functions
1487
.gnutls_openpgp_crt_verify_self(crt, 0,
1488
ctypes.byref(crtverify)))
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1489
2476
if crtverify.value != 0:
1490
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1491
raise (gnutls.errors.CertificateSecurityError
1492
("Verify failed"))
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
2479
=crtverify.value)
1493
2480
# New buffer for the fingerprint
1494
2481
buf = ctypes.create_string_buffer(20)
1495
2482
buf_len = ctypes.c_size_t()
1496
2483
# Get the fingerprint from the certificate into the buffer
1497
(gnutls.library.functions
1498
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1499
ctypes.byref(buf_len)))
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1500
2486
# Deinit the certificate
1501
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2487
gnutls.openpgp_crt_deinit(crt)
1502
2488
# Convert the buffer to a Python bytestring
1503
2489
fpr = ctypes.string_at(buf, buf_len.value)
1504
2490
# Convert the bytestring to hexadecimal notation
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2491
hex_fpr = binascii.hexlify(fpr).upper()
1506
2492
return hex_fpr
1507
2493
1508
2494
1509
2495
class MultiprocessingMixIn(object):
1510
2496
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2497
1511
2498
def sub_process_main(self, request, address):
1512
2499
try:
1513
2500
self.finish_request(request, address)
1514
except:
2501
except Exception:
1515
2502
self.handle_error(request, address)
1516
2503
self.close_request(request)
1517
2504
1518
2505
def process_request(self, request, address):
1519
2506
"""Start a new process to process the request."""
1520
proc = multiprocessing.Process(target = self.sub_process_main,
1521
args = (request,
1522
address))
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
1523
2509
proc.start()
1524
2510
return proc
1525
2511
1526
2512
1527
2513
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1528
2514
""" adds a pipe to the MixIn """
2515
1529
2516
def process_request(self, request, client_address):
1530
2517
"""Overrides and wraps the original process_request().
1531
2518
1532
2519
This function creates a new pipe in self.pipe
1533
2520
"""
1534
2521
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1535
2522
1536
2523
proc = MultiprocessingMixIn.process_request(self, request,
1537
2524
client_address)
1538
2525
self.child_pipe.close()
1539
2526
self.add_pipe(parent_pipe, proc)
1540
2527
1541
2528
def add_pipe(self, parent_pipe, proc):
1542
2529
"""Dummy function; override as necessary"""
1543
raise NotImplementedError
2530
raise NotImplementedError()
1544
2531
1545
2532
1546
2533
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1547
2534
socketserver.TCPServer, object):
1548
2535
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1549
2536
1550
2537
Attributes:
1551
2538
enabled: Boolean; whether this server is activated yet
1552
2539
interface: None or a network interface name (string)
1553
2540
use_ipv6: Boolean; to use IPv6 or not
1554
2541
"""
2542
1555
2543
def __init__(self, server_address, RequestHandlerClass,
1556
interface=None, use_ipv6=True):
2544
interface=None,
2545
use_ipv6=True,
2546
socketfd=None):
2547
"""If socketfd is set, use that file descriptor instead of
2548
creating a new one with socket.socket().
2549
"""
1557
2550
self.interface = interface
1558
2551
if use_ipv6:
1559
2552
self.address_family = socket.AF_INET6
2553
if socketfd is not None:
2554
# Save the file descriptor
2555
self.socketfd = socketfd
2556
# Save the original socket.socket() function
2557
self.socket_socket = socket.socket
2558
2559
# To implement --socket, we monkey patch socket.socket.
2560
#
2561
# (When socketserver.TCPServer is a new-style class, we
2562
# could make self.socket into a property instead of monkey
2563
# patching socket.socket.)
2564
#
2565
# Create a one-time-only replacement for socket.socket()
2566
@functools.wraps(socket.socket)
2567
def socket_wrapper(*args, **kwargs):
2568
# Restore original function so subsequent calls are
2569
# not affected.
2570
socket.socket = self.socket_socket
2571
del self.socket_socket
2572
# This time only, return a new socket object from the
2573
# saved file descriptor.
2574
return socket.fromfd(self.socketfd, *args, **kwargs)
2575
# Replace socket.socket() function with wrapper
2576
socket.socket = socket_wrapper
2577
# The socketserver.TCPServer.__init__ will call
2578
# socket.socket(), which might be our replacement,
2579
# socket_wrapper(), if socketfd was set.
1560
2580
socketserver.TCPServer.__init__(self, server_address,
1561
2581
RequestHandlerClass)
2582
1562
2583
def server_bind(self):
1563
2584
"""This overrides the normal server_bind() function
1564
2585
to bind to an interface if one was specified, and also NOT to
1565
2586
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
1566
2588
if self.interface is not None:
1567
2589
if SO_BINDTODEVICE is None:
1568
logger.error("SO_BINDTODEVICE does not exist;"
1569
" cannot bind to interface %s",
1570
self.interface)
1571
else:
1572
try:
1573
self.socket.setsockopt(socket.SOL_SOCKET,
1574
SO_BINDTODEVICE,
1575
str(self.interface
1576
+ '\0'))
1577
except socket.error as error:
1578
if error[0] == errno.EPERM:
1579
logger.error("No permission to"
1580
" bind to interface %s",
1581
self.interface)
1582
elif error[0] == errno.ENOPROTOOPT:
1583
logger.error("SO_BINDTODEVICE not available;"
1584
" cannot bind to interface %s",
1585
self.interface)
1586
else:
1587
raise
2590
# Fall back to a hard-coded value which seems to be
2591
# common enough.
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2594
try:
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2605
self.interface)
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
2609
else:
2610
raise
1588
2611
# Only bind(2) the socket if we really need to.
1589
2612
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
1590
2615
if not self.server_address[0]:
1591
2616
if self.address_family == socket.AF_INET6:
1592
any_address = "::" # in6addr_any
2617
any_address = "::" # in6addr_any
1593
2618
else:
1594
any_address = socket.INADDR_ANY
2619
any_address = "0.0.0.0" # INADDR_ANY
1595
2620
self.server_address = (any_address,
1596
2621
self.server_address[1])
1597
2622
elif not self.server_address[1]:
1598
self.server_address = (self.server_address[0],
1599
0)
2623
self.server_address = (self.server_address[0], 0)
1600
2624
# if self.interface:
1601
2625
# self.server_address = (self.server_address[0],
1602
2626
# 0, # port
1608
2632
1609
2633
class MandosServer(IPv6_TCPServer):
1610
2634
"""Mandos server.
1611
2635
1612
2636
Attributes:
1613
2637
clients: set of Client objects
1614
2638
gnutls_priority GnuTLS priority string
1615
2639
use_dbus: Boolean; to emit D-Bus signals or not
1616
1617
Assumes a gobject.MainLoop event loop.
2640
2641
Assumes a GLib.MainLoop event loop.
1618
2642
"""
2643
1619
2644
def __init__(self, server_address, RequestHandlerClass,
1620
interface=None, use_ipv6=True, clients=None,
1621
gnutls_priority=None, use_dbus=True):
2645
interface=None,
2646
use_ipv6=True,
2647
clients=None,
2648
gnutls_priority=None,
2649
use_dbus=True,
2650
socketfd=None):
1622
2651
self.enabled = False
1623
2652
self.clients = clients
1624
2653
if self.clients is None:
1625
self.clients = set()
2654
self.clients = {}
1626
2655
self.use_dbus = use_dbus
1627
2656
self.gnutls_priority = gnutls_priority
1628
2657
IPv6_TCPServer.__init__(self, server_address,
1629
2658
RequestHandlerClass,
1630
interface = interface,
1631
use_ipv6 = use_ipv6)
2659
interface=interface,
2660
use_ipv6=use_ipv6,
2661
socketfd=socketfd)
2662
1632
2663
def server_activate(self):
1633
2664
if self.enabled:
1634
2665
return socketserver.TCPServer.server_activate(self)
1635
2666
1636
2667
def enable(self):
1637
2668
self.enabled = True
1638
2669
1639
2670
def add_pipe(self, parent_pipe, proc):
1640
2671
# Call "handle_ipc" for both data and EOF events
1641
gobject.io_add_watch(parent_pipe.fileno(),
1642
gobject.IO_IN | gobject.IO_HUP,
1643
functools.partial(self.handle_ipc,
1644
parent_pipe =
1645
parent_pipe,
1646
proc = proc))
1647
1648
def handle_ipc(self, source, condition, parent_pipe=None,
1649
proc = None, client_object=None):
1650
condition_names = {
1651
gobject.IO_IN: "IN", # There is data to read.
1652
gobject.IO_OUT: "OUT", # Data can be written (without
1653
# blocking).
1654
gobject.IO_PRI: "PRI", # There is urgent data to read.
1655
gobject.IO_ERR: "ERR", # Error condition.
1656
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1657
# broken, usually for pipes and
1658
# sockets).
1659
}
1660
conditions_string = ' | '.join(name
1661
for cond, name in
1662
condition_names.iteritems()
1663
if cond & condition)
1664
# error or the other end of multiprocessing.Pipe has closed
1665
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2672
GLib.io_add_watch(
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2677
proc=proc))
2678
2679
def handle_ipc(self, source, condition,
2680
parent_pipe=None,
2681
proc=None,
2682
client_object=None):
2683
# error, or the other end of multiprocessing.Pipe has closed
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2685
# Wait for other process to exit
1666
2686
proc.join()
1667
2687
return False
1668
2688
1669
2689
# Read a request from the child
1670
2690
request = parent_pipe.recv()
1671
2691
command = request[0]
1672
2692
1673
2693
if command == 'init':
1674
fpr = request[1]
1675
address = request[2]
1676
1677
for c in self.clients:
1678
if c.fingerprint == fpr:
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2697
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2700
continue
2701
if key_id and c.key_id == key_id:
2702
client = c
2703
break
2704
if fpr and c.fingerprint == fpr:
1679
2705
client = c
1680
2706
break
1681
2707
else:
1682
logger.info("Client not found for fingerprint: %s, ad"
1683
"dress: %s", fpr, address)
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
1684
2710
if self.use_dbus:
1685
2711
# Emit D-Bus signal
1686
mandos_dbus_service.ClientNotFound(fpr,
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
1687
2713
address[0])
1688
2714
parent_pipe.send(False)
1689
2715
return False
1690
1691
gobject.io_add_watch(parent_pipe.fileno(),
1692
gobject.IO_IN | gobject.IO_HUP,
1693
functools.partial(self.handle_ipc,
1694
parent_pipe =
1695
parent_pipe,
1696
proc = proc,
1697
client_object =
1698
client))
2716
2717
GLib.io_add_watch(
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2722
proc=proc,
2723
client_object=client))
1699
2724
parent_pipe.send(True)
1700
2725
# remove the old hook in favor of the new above hook on
1701
2726
# same fileno
1704
2729
funcname = request[1]
1705
2730
args = request[2]
1706
2731
kwargs = request[3]
1707
2732
1708
2733
parent_pipe.send(('data', getattr(client_object,
1709
2734
funcname)(*args,
1710
**kwargs)))
1711
2735
**kwargs)))
2736
1712
2737
if command == 'getattr':
1713
2738
attrname = request[1]
1714
if callable(client_object.__getattribute__(attrname)):
1715
parent_pipe.send(('function',))
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
1716
2742
else:
1717
parent_pipe.send(('data', client_object
1718
.__getattribute__(attrname)))
1719
2743
parent_pipe.send((
2744
'data', client_object.__getattribute__(attrname)))
2745
1720
2746
if command == 'setattr':
1721
2747
attrname = request[1]
1722
2748
value = request[2]
1723
2749
setattr(client_object, attrname, value)
1724
2750
1725
2751
return True
1726
2752
1727
2753
2754
def rfc3339_duration_to_delta(duration):
2755
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2756
2757
>>> rfc3339_duration_to_delta("P7D")
2758
datetime.timedelta(7)
2759
>>> rfc3339_duration_to_delta("PT60S")
2760
datetime.timedelta(0, 60)
2761
>>> rfc3339_duration_to_delta("PT60M")
2762
datetime.timedelta(0, 3600)
2763
>>> rfc3339_duration_to_delta("PT24H")
2764
datetime.timedelta(1)
2765
>>> rfc3339_duration_to_delta("P1W")
2766
datetime.timedelta(7)
2767
>>> rfc3339_duration_to_delta("PT5M30S")
2768
datetime.timedelta(0, 330)
2769
>>> rfc3339_duration_to_delta("P1DT3M20S")
2770
datetime.timedelta(1, 200)
2771
"""
2772
2773
# Parsing an RFC 3339 duration with regular expressions is not
2774
# possible - there would have to be multiple places for the same
2775
# values, like seconds. The current code, while more esoteric, is
2776
# cleaner without depending on a parsing library. If Python had a
2777
# built-in library for parsing we would use it, but we'd like to
2778
# avoid excessive use of external libraries.
2779
2780
# New type for defining tokens, syntax, and semantics all-in-one
2781
Token = collections.namedtuple("Token", (
2782
"regexp", # To match token; if "value" is not None, must have
2783
# a "group" containing digits
2784
"value", # datetime.timedelta or None
2785
"followers")) # Tokens valid after this token
2786
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2787
# the "duration" ABNF definition in RFC 3339, Appendix A.
2788
token_end = Token(re.compile(r"$"), None, frozenset())
2789
token_second = Token(re.compile(r"(\d+)S"),
2790
datetime.timedelta(seconds=1),
2791
frozenset((token_end, )))
2792
token_minute = Token(re.compile(r"(\d+)M"),
2793
datetime.timedelta(minutes=1),
2794
frozenset((token_second, token_end)))
2795
token_hour = Token(re.compile(r"(\d+)H"),
2796
datetime.timedelta(hours=1),
2797
frozenset((token_minute, token_end)))
2798
token_time = Token(re.compile(r"T"),
2799
None,
2800
frozenset((token_hour, token_minute,
2801
token_second)))
2802
token_day = Token(re.compile(r"(\d+)D"),
2803
datetime.timedelta(days=1),
2804
frozenset((token_time, token_end)))
2805
token_month = Token(re.compile(r"(\d+)M"),
2806
datetime.timedelta(weeks=4),
2807
frozenset((token_day, token_end)))
2808
token_year = Token(re.compile(r"(\d+)Y"),
2809
datetime.timedelta(weeks=52),
2810
frozenset((token_month, token_end)))
2811
token_week = Token(re.compile(r"(\d+)W"),
2812
datetime.timedelta(weeks=1),
2813
frozenset((token_end, )))
2814
token_duration = Token(re.compile(r"P"), None,
2815
frozenset((token_year, token_month,
2816
token_day, token_time,
2817
token_week)))
2818
# Define starting values:
2819
# Value so far
2820
value = datetime.timedelta()
2821
found_token = None
2822
# Following valid tokens
2823
followers = frozenset((token_duration, ))
2824
# String left to parse
2825
s = duration
2826
# Loop until end token is found
2827
while found_token is not token_end:
2828
# Search for any currently valid tokens
2829
for token in followers:
2830
match = token.regexp.match(s)
2831
if match is not None:
2832
# Token found
2833
if token.value is not None:
2834
# Value found, parse digits
2835
factor = int(match.group(1), 10)
2836
# Add to value so far
2837
value += factor * token.value
2838
# Strip token from string
2839
s = token.regexp.sub("", s, 1)
2840
# Go to found token
2841
found_token = token
2842
# Set valid next tokens
2843
followers = found_token.followers
2844
break
2845
else:
2846
# No currently valid tokens were found
2847
raise ValueError("Invalid RFC 3339 duration: {!r}"
2848
.format(duration))
2849
# End token found
2850
return value
2851
2852
1728
2853
def string_to_delta(interval):
1729
2854
"""Parse a string and return a datetime.timedelta
1730
2855
1731
2856
>>> string_to_delta('7d')
1732
2857
datetime.timedelta(7)
1733
2858
>>> string_to_delta('60s')
1741
2866
>>> string_to_delta('5m 30s')
1742
2867
datetime.timedelta(0, 330)
1743
2868
"""
2869
2870
try:
2871
return rfc3339_duration_to_delta(interval)
2872
except ValueError:
2873
pass
2874
1744
2875
timevalue = datetime.timedelta(0)
1745
2876
for s in interval.split():
1746
2877
try:
1747
suffix = unicode(s[-1])
2878
suffix = s[-1]
1748
2879
value = int(s[:-1])
1749
2880
if suffix == "d":
1750
2881
delta = datetime.timedelta(value)
1757
2888
elif suffix == "w":
1758
2889
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1759
2890
else:
1760
raise ValueError("Unknown suffix %r" % suffix)
1761
except (ValueError, IndexError) as e:
2891
raise ValueError("Unknown suffix {!r}".format(suffix))
2892
except IndexError as e:
1762
2893
raise ValueError(*(e.args))
1763
2894
timevalue += delta
1764
2895
return timevalue
1765
2896
1766
2897
1767
def if_nametoindex(interface):
1768
"""Call the C function if_nametoindex(), or equivalent
1769
1770
Note: This function cannot accept a unicode string."""
1771
global if_nametoindex
1772
try:
1773
if_nametoindex = (ctypes.cdll.LoadLibrary
1774
(ctypes.util.find_library("c"))
1775
.if_nametoindex)
1776
except (OSError, AttributeError):
1777
logger.warning("Doing if_nametoindex the hard way")
1778
def if_nametoindex(interface):
1779
"Get an interface index the hard way, i.e. using fcntl()"
1780
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1781
with contextlib.closing(socket.socket()) as s:
1782
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1783
struct.pack(str("16s16x"),
1784
interface))
1785
interface_index = struct.unpack(str("I"),
1786
ifreq[16:20])[0]
1787
return interface_index
1788
return if_nametoindex(interface)
1789
1790
1791
def daemon(nochdir = False, noclose = False):
2898
def daemon(nochdir=False, noclose=False):
1792
2899
"""See daemon(3). Standard BSD Unix function.
1793
2900
1794
2901
This should really exist as os.daemon, but it doesn't (yet)."""
1795
2902
if os.fork():
1796
2903
sys.exit()
1801
2908
sys.exit()
1802
2909
if not noclose:
1803
2910
# Close all standard open file descriptors
1804
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2911
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1805
2912
if not stat.S_ISCHR(os.fstat(null).st_mode):
1806
2913
raise OSError(errno.ENODEV,
1807
"%s not a character device"
1808
% os.path.devnull)
2914
"{} not a character device"
2915
.format(os.devnull))
1809
2916
os.dup2(null, sys.stdin.fileno())
1810
2917
os.dup2(null, sys.stdout.fileno())
1811
2918
os.dup2(null, sys.stderr.fileno())
1814
2921
1815
2922
1816
2923
def main():
1817
2924
1818
2925
##################################################################
1819
2926
# Parsing of options, both command line and config file
1820
2927
1821
2928
parser = argparse.ArgumentParser()
1822
2929
parser.add_argument("-v", "--version", action="version",
1823
version = "%%(prog)s %s" % version,
2930
version="%(prog)s {}".format(version),
1824
2931
help="show version number and exit")
1825
2932
parser.add_argument("-i", "--interface", metavar="IF",
1826
2933
help="Bind to interface IF")
1832
2939
help="Run self-test")
1833
2940
parser.add_argument("--debug", action="store_true",
1834
2941
help="Debug mode; run in foreground and log"
1835
" to terminal")
2942
" to terminal", default=None)
1836
2943
parser.add_argument("--debuglevel", metavar="LEVEL",
1837
2944
help="Debug level for stdout output")
1838
2945
parser.add_argument("--priority", help="GnuTLS"
1845
2952
" files")
1846
2953
parser.add_argument("--no-dbus", action="store_false",
1847
2954
dest="use_dbus", help="Do not provide D-Bus"
1848
" system bus interface")
2955
" system bus interface", default=None)
1849
2956
parser.add_argument("--no-ipv6", action="store_false",
1850
dest="use_ipv6", help="Do not use IPv6")
2957
dest="use_ipv6", help="Do not use IPv6",
2958
default=None)
2959
parser.add_argument("--no-restore", action="store_false",
2960
dest="restore", help="Do not restore stored"
2961
" state", default=None)
2962
parser.add_argument("--socket", type=int,
2963
help="Specify a file descriptor to a network"
2964
" socket to use instead of creating one")
2965
parser.add_argument("--statedir", metavar="DIR",
2966
help="Directory to save/restore state in")
2967
parser.add_argument("--foreground", action="store_true",
2968
help="Run in foreground", default=None)
2969
parser.add_argument("--no-zeroconf", action="store_false",
2970
dest="zeroconf", help="Do not use Zeroconf",
2971
default=None)
2972
1851
2973
options = parser.parse_args()
1852
2974
1853
2975
if options.check:
1854
2976
import doctest
1855
doctest.testmod()
1856
sys.exit()
1857
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2979
1858
2980
# Default values for config file for server-global settings
1859
server_defaults = { "interface": "",
1860
"address": "",
1861
"port": "",
1862
"debug": "False",
1863
"priority":
1864
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1865
"servicename": "Mandos",
1866
"use_dbus": "True",
1867
"use_ipv6": "True",
1868
"debuglevel": "",
1869
}
1870
2981
if gnutls.has_rawpk:
2982
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2983
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2984
else:
2985
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2986
":+SIGN-DSA-SHA256")
2987
server_defaults = {"interface": "",
2988
"address": "",
2989
"port": "",
2990
"debug": "False",
2991
"priority": priority,
2992
"servicename": "Mandos",
2993
"use_dbus": "True",
2994
"use_ipv6": "True",
2995
"debuglevel": "",
2996
"restore": "True",
2997
"socket": "",
2998
"statedir": "/var/lib/mandos",
2999
"foreground": "False",
3000
"zeroconf": "True",
3001
}
3002
del priority
3003
1871
3004
# Parse config file for server-global settings
1872
server_config = configparser.SafeConfigParser(server_defaults)
3005
server_config = configparser.ConfigParser(server_defaults)
1873
3006
del server_defaults
1874
server_config.read(os.path.join(options.configdir,
1875
"mandos.conf"))
1876
# Convert the SafeConfigParser object to a dict
3007
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
1877
3009
server_settings = server_config.defaults()
1878
3010
# Use the appropriate methods on the non-string config options
1879
for option in ("debug", "use_dbus", "use_ipv6"):
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
1880
3013
server_settings[option] = server_config.getboolean("DEFAULT",
1881
3014
option)
1882
3015
if server_settings["port"]:
1883
3016
server_settings["port"] = server_config.getint("DEFAULT",
1884
3017
"port")
3018
if server_settings["socket"]:
3019
server_settings["socket"] = server_config.getint("DEFAULT",
3020
"socket")
3021
# Later, stdin will, and stdout and stderr might, be dup'ed
3022
# over with an opened os.devnull. But we don't want this to
3023
# happen with a supplied network socket.
3024
if 0 <= server_settings["socket"] <= 2:
3025
server_settings["socket"] = os.dup(server_settings
3026
["socket"])
1885
3027
del server_config
1886
3028
1887
3029
# Override the settings from the config file with command line
1888
3030
# options, if set.
1889
3031
for option in ("interface", "address", "port", "debug",
1890
"priority", "servicename", "configdir",
1891
"use_dbus", "use_ipv6", "debuglevel"):
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
1892
3035
value = getattr(options, option)
1893
3036
if value is not None:
1894
3037
server_settings[option] = value
1895
3038
del options
1896
3039
# Force all strings to be unicode
1897
3040
for option in server_settings.keys():
1898
if type(server_settings[option]) is str:
1899
server_settings[option] = unicode(server_settings[option])
3041
if isinstance(server_settings[option], bytes):
3042
server_settings[option] = (server_settings[option]
3043
.decode("utf-8"))
3044
# Force all boolean options to be boolean
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
3047
server_settings[option] = bool(server_settings[option])
3048
# Debug implies foreground
3049
if server_settings["debug"]:
3050
server_settings["foreground"] = True
1900
3051
# Now we have our good server settings in "server_settings"
1901
3052
1902
3053
##################################################################
1903
3054
3055
if (not server_settings["zeroconf"]
3056
and not (server_settings["port"]
3057
or server_settings["socket"] != "")):
3058
parser.error("Needs port or socket to work without Zeroconf")
3059
1904
3060
# For convenience
1905
3061
debug = server_settings["debug"]
1906
3062
debuglevel = server_settings["debuglevel"]
1907
3063
use_dbus = server_settings["use_dbus"]
1908
3064
use_ipv6 = server_settings["use_ipv6"]
1909
3065
stored_state_path = os.path.join(server_settings["statedir"],
3066
stored_state_file)
3067
foreground = server_settings["foreground"]
3068
zeroconf = server_settings["zeroconf"]
3069
3070
if debug:
3071
initlogger(debug, logging.DEBUG)
3072
else:
3073
if not debuglevel:
3074
initlogger(debug)
3075
else:
3076
level = getattr(logging, debuglevel.upper())
3077
initlogger(debug, level)
3078
1910
3079
if server_settings["servicename"] != "Mandos":
1911
syslogger.setFormatter(logging.Formatter
1912
('Mandos (%s) [%%(process)d]:'
1913
' %%(levelname)s: %%(message)s'
1914
% server_settings["servicename"]))
1915
3080
syslogger.setFormatter(
3081
logging.Formatter('Mandos ({}) [%(process)d]:'
3082
' %(levelname)s: %(message)s'.format(
3083
server_settings["servicename"])))
3084
1916
3085
# Parse config file with clients
1917
client_defaults = { "timeout": "5m",
1918
"extended_timeout": "15m",
1919
"interval": "2m",
1920
"checker": "fping -q -- %%(host)s",
1921
"host": "",
1922
"approval_delay": "0s",
1923
"approval_duration": "1s",
1924
}
1925
client_config = configparser.SafeConfigParser(client_defaults)
3086
client_config = configparser.ConfigParser(Client.client_defaults)
1926
3087
client_config.read(os.path.join(server_settings["configdir"],
1927
3088
"clients.conf"))
1928
3089
1929
3090
global mandos_dbus_service
1930
3091
mandos_dbus_service = None
1931
1932
tcp_server = MandosServer((server_settings["address"],
1933
server_settings["port"]),
1934
ClientHandler,
1935
interface=(server_settings["interface"]
1936
or None),
1937
use_ipv6=use_ipv6,
1938
gnutls_priority=
1939
server_settings["priority"],
1940
use_dbus=use_dbus)
1941
if not debug:
1942
pidfilename = "/var/run/mandos.pid"
1943
try:
1944
pidfile = open(pidfilename, "w")
1945
except IOError:
1946
logger.error("Could not open file %r", pidfilename)
1947
1948
try:
1949
uid = pwd.getpwnam("_mandos").pw_uid
1950
gid = pwd.getpwnam("_mandos").pw_gid
1951
except KeyError:
1952
try:
1953
uid = pwd.getpwnam("mandos").pw_uid
1954
gid = pwd.getpwnam("mandos").pw_gid
3092
3093
socketfd = None
3094
if server_settings["socket"] != "":
3095
socketfd = server_settings["socket"]
3096
tcp_server = MandosServer(
3097
(server_settings["address"], server_settings["port"]),
3098
ClientHandler,
3099
interface=(server_settings["interface"] or None),
3100
use_ipv6=use_ipv6,
3101
gnutls_priority=server_settings["priority"],
3102
use_dbus=use_dbus,
3103
socketfd=socketfd)
3104
if not foreground:
3105
pidfilename = "/run/mandos.pid"
3106
if not os.path.isdir("/run/."):
3107
pidfilename = "/var/run/mandos.pid"
3108
pidfile = None
3109
try:
3110
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3111
except IOError as e:
3112
logger.error("Could not open file %r", pidfilename,
3113
exc_info=e)
3114
3115
for name, group in (("_mandos", "_mandos"),
3116
("mandos", "mandos"),
3117
("nobody", "nogroup")):
3118
try:
3119
uid = pwd.getpwnam(name).pw_uid
3120
gid = pwd.getpwnam(group).pw_gid
3121
break
1955
3122
except KeyError:
1956
try:
1957
uid = pwd.getpwnam("nobody").pw_uid
1958
gid = pwd.getpwnam("nobody").pw_gid
1959
except KeyError:
1960
uid = 65534
1961
gid = 65534
3123
continue
3124
else:
3125
uid = 65534
3126
gid = 65534
1962
3127
try:
1963
3128
os.setgid(gid)
1964
3129
os.setuid(uid)
3130
if debug:
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3132
gid))
1965
3133
except OSError as error:
1966
if error[0] != errno.EPERM:
1967
raise error
1968
1969
if not debug and not debuglevel:
1970
syslogger.setLevel(logging.WARNING)
1971
console.setLevel(logging.WARNING)
1972
if debuglevel:
1973
level = getattr(logging, debuglevel.upper())
1974
syslogger.setLevel(level)
1975
console.setLevel(level)
1976
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
3137
raise
3138
1977
3139
if debug:
1978
3140
# Enable all possible GnuTLS debugging
1979
3141
1980
3142
# "Use a log level over 10 to enable all debugging options."
1981
3143
# - GnuTLS manual
1982
gnutls.library.functions.gnutls_global_set_log_level(11)
1983
1984
@gnutls.library.types.gnutls_log_func
3144
gnutls.global_set_log_level(11)
3145
3146
@gnutls.log_func
1985
3147
def debug_gnutls(level, string):
1986
3148
logger.debug("GnuTLS: %s", string[:-1])
1987
1988
(gnutls.library.functions
1989
.gnutls_global_set_log_function(debug_gnutls))
1990
3149
3150
gnutls.global_set_log_function(debug_gnutls)
3151
1991
3152
# Redirect stdin so all checkers get /dev/null
1992
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1993
3154
os.dup2(null, sys.stdin.fileno())
1994
3155
if null > 2:
1995
3156
os.close(null)
1996
else:
1997
# No console logging
1998
logger.removeHandler(console)
1999
3157
2000
3158
# Need to fork before connecting to D-Bus
2001
if not debug:
3159
if not foreground:
2002
3160
# Close all input and output, do double fork, etc.
2003
3161
daemon()
2004
3162
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
3166
GLib.threads_init()
3167
2005
3168
global main_loop
2006
3169
# From the Avahi example code
2007
DBusGMainLoop(set_as_default=True )
2008
main_loop = gobject.MainLoop()
3170
DBusGMainLoop(set_as_default=True)
3171
main_loop = GLib.MainLoop()
2009
3172
bus = dbus.SystemBus()
2010
3173
# End of Avahi example code
2011
3174
if use_dbus:
2012
3175
try:
2013
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2014
bus, do_not_queue=True)
2015
old_bus_name = (dbus.service.BusName
2016
("se.bsnet.fukt.Mandos", bus,
2017
do_not_queue=True))
2018
except dbus.exceptions.NameExistsException as e:
2019
logger.error(unicode(e) + ", disabling D-Bus")
3177
bus,
3178
do_not_queue=True)
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3181
do_not_queue=True)
3182
except dbus.exceptions.DBusException as e:
3183
logger.error("Disabling D-Bus:", exc_info=e)
2020
3184
use_dbus = False
2021
3185
server_settings["use_dbus"] = False
2022
3186
tcp_server.use_dbus = False
2023
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2024
service = AvahiService(name = server_settings["servicename"],
2025
servicetype = "_mandos._tcp",
2026
protocol = protocol, bus = bus)
2027
if server_settings["interface"]:
2028
service.interface = (if_nametoindex
2029
(str(server_settings["interface"])))
2030
3187
if zeroconf:
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3192
protocol=protocol,
3193
bus=bus)
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
3197
2031
3198
global multiprocessing_manager
2032
3199
multiprocessing_manager = multiprocessing.Manager()
2033
3200
2034
3201
client_class = Client
2035
3202
if use_dbus:
2036
client_class = functools.partial(ClientDBusTransitional,
2037
bus = bus)
2038
def client_config_items(config, section):
2039
special_settings = {
2040
"approved_by_default":
2041
lambda: config.getboolean(section,
2042
"approved_by_default"),
2043
}
2044
for name, value in config.items(section):
3203
client_class = functools.partial(ClientDBus, bus=bus)
3204
3205
client_settings = Client.config_parser(client_config)
3206
old_client_settings = {}
3207
clients_data = {}
3208
3209
# This is used to redirect stdout and stderr for checker processes
3210
global wnull
3211
wnull = open(os.devnull, "w") # A writable /dev/null
3212
# Only used if server is running in foreground but not in debug
3213
# mode
3214
if debug or not foreground:
3215
wnull.close()
3216
3217
# Get client data and settings from last running state.
3218
if server_settings["restore"]:
3219
try:
3220
with open(stored_state_path, "rb") as stored_state:
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3223
stored_state)
3224
else:
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3228
# clients_data
3229
# .keys()
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3232
else key): value
3233
for key, value in
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3239
for k, v in
3240
clients_data[key].items()}
3241
clients_data[key] = value
3242
# .client_structure
3243
value["client_structure"] = [
3244
(s.decode("utf-8")
3245
if isinstance(s, bytes)
3246
else s) for s in
3247
value["client_structure"]]
3248
# .name & .host
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3257
# .keys()
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3261
else key): value
3262
for key, value in
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3265
# .host
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
3269
.decode("utf-8"))
3270
os.remove(stored_state_path)
3271
except IOError as e:
3272
if e.errno == errno.ENOENT:
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
3275
else:
3276
logger.critical("Could not load persistent state:",
3277
exc_info=e)
3278
raise
3279
except EOFError as e:
3280
logger.warning("Could not load persistent state: "
3281
"EOFError:",
3282
exc_info=e)
3283
3284
with PGPEngine() as pgp:
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
3288
continue
3289
3290
# Decide which value to use after restoring saved state.
3291
# We have three different values: Old config file,
3292
# new config file, and saved state.
3293
# New config value takes precedence if it differs from old
3294
# config value, otherwise use saved state.
3295
for name, value in client_settings[client_name].items():
3296
try:
3297
# For each value in new config, check if it
3298
# differs from the old config value (Except for
3299
# the "secret" attribute)
3300
if (name != "secret"
3301
and (value !=
3302
old_client_settings[client_name][name])):
3303
client[name] = value
3304
except KeyError:
3305
pass
3306
3307
# Clients who has passed its expire date can still be
3308
# enabled if its last checker was successful. A Client
3309
# whose checker succeeded before we stored its state is
3310
# assumed to have successfully run all checkers during
3311
# downtime.
3312
if client["enabled"]:
3313
if datetime.datetime.utcnow() >= client["expires"]:
3314
if not client["last_checked_ok"]:
3315
logger.warning(
3316
"disabling client {} - Client never "
3317
"performed a successful checker".format(
3318
client_name))
3319
client["enabled"] = False
3320
elif client["last_checker_status"] != 0:
3321
logger.warning(
3322
"disabling client {} - Client last"
3323
" checker failed with error code"
3324
" {}".format(
3325
client_name,
3326
client["last_checker_status"]))
3327
client["enabled"] = False
3328
else:
3329
client["expires"] = (
3330
datetime.datetime.utcnow()
3331
+ client["timeout"])
3332
logger.debug("Last checker succeeded,"
3333
" keeping {} enabled".format(
3334
client_name))
2045
3335
try:
2046
yield (name, special_settings[name]())
2047
except KeyError:
2048
yield (name, value)
2049
2050
tcp_server.clients.update(set(
2051
client_class(name = section,
2052
config= dict(client_config_items(
2053
client_config, section)))
2054
for section in client_config.sections()))
3336
client["secret"] = pgp.decrypt(
3337
client["encrypted_secret"],
3338
client_settings[client_name]["secret"])
3339
except PGPError:
3340
# If decryption fails, we use secret from new settings
3341
logger.debug("Failed to decrypt {} old secret".format(
3342
client_name))
3343
client["secret"] = (client_settings[client_name]
3344
["secret"])
3345
3346
# Add/remove clients based on new changes made to config
3347
for client_name in (set(old_client_settings)
3348
- set(client_settings)):
3349
del clients_data[client_name]
3350
for client_name in (set(client_settings)
3351
- set(old_client_settings)):
3352
clients_data[client_name] = client_settings[client_name]
3353
3354
# Create all client objects
3355
for client_name, client in clients_data.items():
3356
tcp_server.clients[client_name] = client_class(
3357
name=client_name,
3358
settings=client,
3359
server_settings=server_settings)
3360
2055
3361
if not tcp_server.clients:
2056
3362
logger.warning("No clients defined")
2057
2058
if not debug:
2059
try:
2060
with pidfile:
2061
pid = os.getpid()
2062
pidfile.write(str(pid) + "\n".encode("utf-8"))
2063
del pidfile
2064
except IOError:
2065
logger.error("Could not write to file %r with PID %d",
2066
pidfilename, pid)
2067
except NameError:
2068
# "pidfile" was never created
2069
pass
3363
3364
if not foreground:
3365
if pidfile is not None:
3366
pid = os.getpid()
3367
try:
3368
with pidfile:
3369
print(pid, file=pidfile)
3370
except IOError:
3371
logger.error("Could not write to file %r with PID %d",
3372
pidfilename, pid)
3373
del pidfile
2070
3374
del pidfilename
2071
2072
signal.signal(signal.SIGINT, signal.SIG_IGN)
2073
2074
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2075
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2076
3375
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
3379
2077
3380
if use_dbus:
2078
class MandosDBusService(dbus.service.Object):
3381
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2079
3385
"""A D-Bus proxy object"""
3386
2080
3387
def __init__(self):
2081
3388
dbus.service.Object.__init__(self, bus, "/")
3389
2082
3390
_interface = "se.recompile.Mandos"
2083
3391
2084
3392
@dbus.service.signal(_interface, signature="o")
2085
3393
def ClientAdded(self, objpath):
2086
3394
"D-Bus signal"
2087
3395
pass
2088
3396
2089
3397
@dbus.service.signal(_interface, signature="ss")
2090
def ClientNotFound(self, fingerprint, address):
3398
def ClientNotFound(self, key_id, address):
2091
3399
"D-Bus signal"
2092
3400
pass
2093
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2094
3404
@dbus.service.signal(_interface, signature="os")
2095
3405
def ClientRemoved(self, objpath, name):
2096
3406
"D-Bus signal"
2097
3407
pass
2098
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
2099
3411
@dbus.service.method(_interface, out_signature="ao")
2100
3412
def GetAllClients(self):
2101
3413
"D-Bus method"
2102
return dbus.Array(c.dbus_object_path
2103
for c in tcp_server.clients)
2104
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3416
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3418
"true"})
2105
3419
@dbus.service.method(_interface,
2106
3420
out_signature="a{oa{sv}}")
2107
3421
def GetAllClientsWithProperties(self):
2108
3422
"D-Bus method"
2109
3423
return dbus.Dictionary(
2110
((c.dbus_object_path, c.GetAll(""))
2111
for c in tcp_server.clients),
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2112
3427
signature="oa{sv}")
2113
3428
2114
3429
@dbus.service.method(_interface, in_signature="o")
2115
3430
def RemoveClient(self, object_path):
2116
3431
"D-Bus method"
2117
for c in tcp_server.clients:
3432
for c in tcp_server.clients.values():
2118
3433
if c.dbus_object_path == object_path:
2119
tcp_server.clients.remove(c)
3434
del tcp_server.clients[c.name]
2120
3435
c.remove_from_connection()
2121
# Don't signal anything except ClientRemoved
3436
# Don't signal the disabling
2122
3437
c.disable(quiet=True)
2123
# Emit D-Bus signal
2124
self.ClientRemoved(object_path, c.name)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2125
3440
return
2126
3441
raise KeyError(object_path)
2127
3442
2128
3443
del _interface
2129
2130
class MandosDBusServiceTransitional(MandosDBusService):
2131
__metaclass__ = AlternateDBusNamesMetaclass
2132
mandos_dbus_service = MandosDBusServiceTransitional()
2133
3444
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3448
"""D-Bus method"""
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3451
dbus.Dictionary(
3452
{interface: client.GetAll(interface)
3453
for interface in
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3456
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3459
if use_dbus:
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3463
dbus.Dictionary(
3464
{interface: client.GetAll(interface)
3465
for interface in
3466
client._get_all_interface_names()}))
3467
# Old signal
3468
self.ClientAdded(client.dbus_object_path)
3469
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3472
if use_dbus:
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3477
# Old signal
3478
self.ClientRemoved(client.dbus_object_path,
3479
client.name)
3480
3481
mandos_dbus_service = MandosDBusService()
3482
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
3486
wn = wnull
3487
2134
3488
def cleanup():
2135
3489
"Cleanup function; run on exit"
2136
service.cleanup()
2137
2138
multiprocessing.active_children()
3490
if zeroconf:
3491
service.cleanup()
3492
3493
mp.active_children()
3494
wn.close()
3495
if not (tcp_server.clients or client_settings):
3496
return
3497
3498
# Store client before exiting. Secrets are encrypted with key
3499
# based on what config file has. If config file is
3500
# removed/edited, old secret will thus be unrecovable.
3501
clients = {}
3502
with PGPEngine() as pgp:
3503
for client in tcp_server.clients.values():
3504
key = client_settings[client.name]["secret"]
3505
client.encrypted_secret = pgp.encrypt(client.secret,
3506
key)
3507
client_dict = {}
3508
3509
# A list of attributes that can not be pickled
3510
# + secret.
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
3514
.Object):
3515
exclude.add(name)
3516
3517
client_dict["encrypted_secret"] = (client
3518
.encrypted_secret)
3519
for attr in client.client_structure:
3520
if attr not in exclude:
3521
client_dict[attr] = getattr(client, attr)
3522
3523
clients[client.name] = client_dict
3524
del client_settings[client.name]["secret"]
3525
3526
try:
3527
with tempfile.NamedTemporaryFile(
3528
mode='wb',
3529
suffix=".pickle",
3530
prefix='clients-',
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3534
protocol=2)
3535
tempname = stored_state.name
3536
os.rename(tempname, stored_state_path)
3537
except (IOError, OSError) as e:
3538
if not debug:
3539
try:
3540
os.remove(tempname)
3541
except NameError:
3542
pass
3543
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3544
logger.warning("Could not save persistent state: {}"
3545
.format(os.strerror(e.errno)))
3546
else:
3547
logger.warning("Could not save persistent state:",
3548
exc_info=e)
3549
raise
3550
3551
# Delete all clients, and settings from config
2139
3552
while tcp_server.clients:
2140
client = tcp_server.clients.pop()
3553
name, client = tcp_server.clients.popitem()
2141
3554
if use_dbus:
2142
3555
client.remove_from_connection()
2143
client.disable_hook = None
2144
# Don't signal anything except ClientRemoved
3556
# Don't signal the disabling
2145
3557
client.disable(quiet=True)
3558
# Emit D-Bus signal for removal
2146
3559
if use_dbus:
2147
# Emit D-Bus signal
2148
mandos_dbus_service.ClientRemoved(client
2149
.dbus_object_path,
2150
client.name)
2151
3560
mandos_dbus_service.client_removed_signal(client)
3561
client_settings.clear()
3562
2152
3563
atexit.register(cleanup)
2153
2154
for client in tcp_server.clients:
3564
3565
for client in tcp_server.clients.values():
2155
3566
if use_dbus:
2156
# Emit D-Bus signal
2157
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2158
client.enable()
2159
3567
# Emit D-Bus signal for adding
3568
mandos_dbus_service.client_added_signal(client)
3569
# Need to initiate checking of clients
3570
if client.enabled:
3571
client.init_checker()
3572
2160
3573
tcp_server.enable()
2161
3574
tcp_server.server_activate()
2162
3575
2163
3576
# Find out what port we got
2164
service.port = tcp_server.socket.getsockname()[1]
3577
if zeroconf:
3578
service.port = tcp_server.socket.getsockname()[1]
2165
3579
if use_ipv6:
2166
3580
logger.info("Now listening on address %r, port %d,"
2167
" flowinfo %d, scope_id %d"
2168
% tcp_server.socket.getsockname())
3581
" flowinfo %d, scope_id %d",
3582
*tcp_server.socket.getsockname())
2169
3583
else: # IPv4
2170
logger.info("Now listening on address %r, port %d"
2171
% tcp_server.socket.getsockname())
2172
2173
#service.interface = tcp_server.socket.getsockname()[3]
2174
3584
logger.info("Now listening on address %r, port %d",
3585
*tcp_server.socket.getsockname())
3586
3587
# service.interface = tcp_server.socket.getsockname()[3]
3588
2175
3589
try:
2176
# From the Avahi example code
2177
try:
2178
service.activate()
2179
except dbus.exceptions.DBusException as error:
2180
logger.critical("DBusException: %s", error)
2181
cleanup()
2182
sys.exit(1)
2183
# End of Avahi example code
2184
2185
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2186
lambda *args, **kwargs:
2187
(tcp_server.handle_request
2188
(*args[2:], **kwargs) or True))
2189
3590
if zeroconf:
3591
# From the Avahi example code
3592
try:
3593
service.activate()
3594
except dbus.exceptions.DBusException as error:
3595
logger.critical("D-Bus Exception", exc_info=error)
3596
cleanup()
3597
sys.exit(1)
3598
# End of Avahi example code
3599
3600
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3601
lambda *args, **kwargs:
3602
(tcp_server.handle_request
3603
(*args[2:], **kwargs) or True))
3604
2190
3605
logger.debug("Starting main loop")
2191
3606
main_loop.run()
2192
3607
except AvahiError as error:
2193
logger.critical("AvahiError: %s", error)
3608
logger.critical("Avahi Error", exc_info=error)
2194
3609
cleanup()
2195
3610
sys.exit(1)
2196
3611
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0