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- Committer: Björn Påhlsson
- Date: 2011-11-24 21:32:23 UTC
- mfrom: (237.16.12 client-network-hooks)
- mto: (237.7.73 trunk)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: belorn@fukt.bsnet.se-20111124213223-er6pl323sru1y0sz
merge
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
32
31
# Contact the authors at <mandos@recompile.se>.
33
#
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
65
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
66
81
67
import dbus
82
68
import dbus.service
83
import gi
84
from gi.repository import GLib
69
import gobject
70
import avahi
85
71
from dbus.mainloop.glib import DBusGMainLoop
86
72
import ctypes
87
73
import ctypes.util
88
74
import xml.dom.minidom
89
75
import inspect
90
76
91
# Try to find the value of SO_BINDTODEVICE:
92
77
try:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
95
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
96
79
except AttributeError:
97
80
try:
98
# This is where SO_BINDTODEVICE was up to and including Python
99
# 2.6, and also 3.2:
100
81
from IN import SO_BINDTODEVICE
101
82
except ImportError:
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
104
try:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
"/dev/stdin"],
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
113
# No value found
114
SO_BINDTODEVICE = None
115
116
if sys.version_info.major == 2:
117
str = unicode
118
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
121
122
version = "1.8.5"
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
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
306
103
307
104
class AvahiError(Exception):
308
105
def __init__(self, value, *args, **kwargs):
309
106
self.value = value
310
return super(AvahiError, self).__init__(value, *args,
311
**kwargs)
312
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
313
110
314
111
class AvahiServiceError(AvahiError):
315
112
pass
316
113
317
318
114
class AvahiGroupError(AvahiError):
319
115
pass
320
116
321
117
322
118
class AvahiService(object):
323
119
"""An Avahi (Zeroconf) service.
324
120
325
121
Attributes:
326
122
interface: integer; avahi.IF_UNSPEC or an interface index.
327
123
Used to optionally bind to the specified interface.
328
124
name: string; Example: 'Mandos'
329
125
type: string; Example: '_mandos._tcp'.
330
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
331
127
port: integer; what port to announce
332
128
TXT: list of strings; TXT record for the service
333
129
domain: string; Domain to publish on, default to .local if empty.
339
135
server: D-Bus Server
340
136
bus: dbus.SystemBus()
341
137
"""
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):
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):
354
142
self.interface = interface
355
143
self.name = name
356
144
self.type = servicetype
365
153
self.server = None
366
154
self.bus = bus
367
155
self.entry_group_state_changed_match = None
368
369
def rename(self, remove=True):
156
def rename(self):
370
157
"""Derived from the Avahi example code"""
371
158
if self.rename_count >= self.max_renames:
372
159
logger.critical("No suitable Zeroconf service name found"
373
160
" after %i retries, exiting.",
374
161
self.rename_count)
375
162
raise AvahiServiceError("Too many renames")
376
self.name = str(
377
self.server.GetAlternativeServiceName(self.name))
378
self.rename_count += 1
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
379
165
logger.info("Changing Zeroconf service name to %r ...",
380
166
self.name)
381
if remove:
382
self.remove()
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
383
172
try:
384
173
self.add()
385
174
except dbus.exceptions.DBusException as error:
386
if (error.get_dbus_name()
387
== "org.freedesktop.Avahi.CollisionError"):
388
logger.info("Local Zeroconf service name collision.")
389
return self.rename(remove=False)
390
else:
391
logger.critical("D-Bus Exception", exc_info=error)
392
self.cleanup()
393
os._exit(1)
394
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
395
179
def remove(self):
396
180
"""Derived from the Avahi example code"""
397
181
if self.entry_group_state_changed_match is not None:
399
183
self.entry_group_state_changed_match = None
400
184
if self.group is not None:
401
185
self.group.Reset()
402
403
186
def add(self):
404
187
"""Derived from the Avahi example code"""
405
188
self.remove()
410
193
avahi.DBUS_INTERFACE_ENTRY_GROUP)
411
194
self.entry_group_state_changed_match = (
412
195
self.group.connect_to_signal(
413
'StateChanged', self.entry_group_state_changed))
196
'StateChanged', self .entry_group_state_changed))
414
197
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
415
198
self.name, self.type)
416
199
self.group.AddService(
422
205
dbus.UInt16(self.port),
423
206
avahi.string_array_to_txt_array(self.TXT))
424
207
self.group.Commit()
425
426
208
def entry_group_state_changed(self, state, error):
427
209
"""Derived from the Avahi example code"""
428
210
logger.debug("Avahi entry group state change: %i", state)
429
211
430
212
if state == avahi.ENTRY_GROUP_ESTABLISHED:
431
213
logger.debug("Zeroconf service established.")
432
214
elif state == avahi.ENTRY_GROUP_COLLISION:
434
216
self.rename()
435
217
elif state == avahi.ENTRY_GROUP_FAILURE:
436
218
logger.critical("Avahi: Error in group state changed %s",
437
str(error))
438
raise AvahiGroupError("State changed: {!s}".format(error))
439
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
440
222
def cleanup(self):
441
223
"""Derived from the Avahi example code"""
442
224
if self.group is not None:
443
225
try:
444
226
self.group.Free()
445
227
except (dbus.exceptions.UnknownMethodException,
446
dbus.exceptions.DBusException):
228
dbus.exceptions.DBusException) as e:
447
229
pass
448
230
self.group = None
449
231
self.remove()
450
451
232
def server_state_changed(self, state, error=None):
452
233
"""Derived from the Avahi example code"""
453
234
logger.debug("Avahi server state change: %i", state)
454
bad_states = {
455
avahi.SERVER_INVALID: "Zeroconf server invalid",
456
avahi.SERVER_REGISTERING: None,
457
avahi.SERVER_COLLISION: "Zeroconf server name collision",
458
avahi.SERVER_FAILURE: "Zeroconf server failure",
459
}
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" }
460
242
if state in bad_states:
461
243
if bad_states[state] is not None:
462
244
if error is None:
465
247
logger.error(bad_states[state] + ": %r", error)
466
248
self.cleanup()
467
249
elif state == avahi.SERVER_RUNNING:
468
try:
469
self.add()
470
except dbus.exceptions.DBusException as error:
471
if (error.get_dbus_name()
472
== "org.freedesktop.Avahi.CollisionError"):
473
logger.info("Local Zeroconf service name"
474
" collision.")
475
return self.rename(remove=False)
476
else:
477
logger.critical("D-Bus Exception", exc_info=error)
478
self.cleanup()
479
os._exit(1)
250
self.add()
480
251
else:
481
252
if error is None:
482
253
logger.debug("Unknown state: %r", state)
483
254
else:
484
255
logger.debug("Unknown state: %r: %r", state, error)
485
486
256
def activate(self):
487
257
"""Derived from the Avahi example code"""
488
258
if self.server is None:
492
262
follow_name_owner_changes=True),
493
263
avahi.DBUS_INTERFACE_SERVER)
494
264
self.server.connect_to_signal("StateChanged",
495
self.server_state_changed)
265
self.server_state_changed)
496
266
self.server_state_changed(self.server.GetState())
497
267
498
268
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
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
821
275
class Client(object):
822
276
"""A representation of a client host served by this server.
823
277
824
278
Attributes:
825
approved: bool(); 'None' if not yet approved/disapproved
279
_approved: bool(); 'None' if not yet approved/disapproved
826
280
approval_delay: datetime.timedelta(); Time to wait for approval
827
281
approval_duration: datetime.timedelta(); Duration of one approval
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
830
running.
831
checker_callback_tag: a GLib event source tag, or None
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
832
286
checker_command: string; External command which is run to check
833
287
if client lives. %() expansions are done at
834
288
runtime with vars(self) as dict, so that for
835
289
instance %(name)s can be used in the command.
836
checker_initiator_tag: a GLib event source tag, or None
290
checker_initiator_tag: a gobject event source tag, or None
837
291
created: datetime.datetime(); (UTC) object creation
838
client_structure: Object describing what attributes a client has
839
and is used for storing the client at exit
840
292
current_checker_command: string; current running checker_command
841
disable_initiator_tag: a GLib event source tag, or None
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
842
295
enabled: bool()
843
296
fingerprint: string (40 or 32 hexadecimal digits); used to
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
297
uniquely identify the client
847
298
host: string; available for use by the checker command
848
299
interval: datetime.timedelta(); How often to start a new checker
849
300
last_approval_request: datetime.datetime(); (UTC) or None
850
301
last_checked_ok: datetime.datetime(); (UTC) or None
851
last_checker_status: integer between 0 and 255 reflecting exit
852
status of last checker. -1 reflects crashed
853
checker, -2 means no checker completed yet.
854
last_checker_signal: The signal which killed the last checker, if
855
last_checker_status is -1
856
last_enabled: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
857
303
name: string; from the config file, used in log messages and
858
304
D-Bus identifiers
859
305
secret: bytestring; sent verbatim (over TLS) to client
860
306
timeout: datetime.timedelta(); How long from last_checked_ok
861
307
until this client is disabled
862
extended_timeout: extra long timeout when secret has been sent
308
extended_timeout: extra long timeout when password has been sent
863
309
runtime_expansions: Allowed attributes for runtime expansion.
864
310
expires: datetime.datetime(); time (UTC) when a client will be
865
311
disabled, or None
866
server_settings: The server_settings dict from main()
867
312
"""
868
313
869
314
runtime_expansions = ("approval_delay", "approval_duration",
870
"created", "enabled", "expires", "key_id",
871
"fingerprint", "host", "interval",
872
"last_approval_request", "last_checked_ok",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
873
317
"last_enabled", "name", "timeout")
874
client_defaults = {
875
"timeout": "PT5M",
876
"extended_timeout": "PT15M",
877
"interval": "PT2M",
878
"checker": "fping -q -- %%(host)s",
879
"host": "",
880
"approval_delay": "PT0S",
881
"approval_duration": "PT1S",
882
"approved_by_default": "True",
883
"enabled": "True",
884
}
885
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):
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."""
941
338
self.name = name
942
if server_settings is None:
943
server_settings = {}
944
self.server_settings = server_settings
945
# adding all client settings
946
for setting, value in settings.items():
947
setattr(self, setting, value)
948
949
if self.enabled:
950
if not hasattr(self, "last_enabled"):
951
self.last_enabled = datetime.datetime.utcnow()
952
if not hasattr(self, "expires"):
953
self.expires = (datetime.datetime.utcnow()
954
+ self.timeout)
955
else:
956
self.last_enabled = None
957
self.expires = None
958
339
if config is None:
340
config = {}
959
341
logger.debug("Creating client %r", self.name)
960
logger.debug(" Key ID: %s", self.key_id)
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(" ", ""))
961
347
logger.debug(" Fingerprint: %s", self.fingerprint)
962
self.created = settings.get("created",
963
datetime.datetime.utcnow())
964
965
# attributes specific for this server instance
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
966
369
self.checker = None
967
370
self.checker_initiator_tag = None
968
371
self.disable_initiator_tag = None
372
self.expires = None
969
373
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
970
375
self.current_checker_command = None
971
self.approved = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
972
380
self.approvals_pending = 0
973
self.changedstate = multiprocessing_manager.Condition(
974
multiprocessing_manager.Lock())
975
self.client_structure = [attr
976
for attr in self.__dict__.keys()
977
if not attr.startswith("_")]
978
self.client_structure.append("client_structure")
979
980
for name, t in inspect.getmembers(
981
type(self), lambda obj: isinstance(obj, property)):
982
if not name.startswith("_"):
983
self.client_structure.append(name)
984
985
# Send notice to process children that client state has changed
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
986
389
def send_changedstate(self):
987
with self.changedstate:
988
self.changedstate.notify_all()
989
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
990
394
def enable(self):
991
395
"""Start this client's checker and timeout hooks"""
992
396
if getattr(self, "enabled", False):
993
397
# Already enabled
994
398
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
995
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
996
410
self.enabled = True
997
411
self.last_enabled = datetime.datetime.utcnow()
998
self.init_checker()
999
self.send_changedstate()
1000
412
# Also start a new checker *right now*.
413
self.start_checker()
414
1001
415
def disable(self, quiet=True):
1002
416
"""Disable this client."""
1003
417
if not getattr(self, "enabled", False):
1004
418
return False
1005
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
1006
422
logger.info("Disabling client %s", self.name)
1007
if getattr(self, "disable_initiator_tag", None) is not None:
1008
GLib.source_remove(self.disable_initiator_tag)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1009
425
self.disable_initiator_tag = None
1010
426
self.expires = None
1011
if getattr(self, "checker_initiator_tag", None) is not None:
1012
GLib.source_remove(self.checker_initiator_tag)
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1013
429
self.checker_initiator_tag = None
1014
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
1015
433
self.enabled = False
1016
if not quiet:
1017
self.send_changedstate()
1018
# Do not run this again if called by a GLib.timeout_add
434
# Do not run this again if called by a gobject.timeout_add
1019
435
return False
1020
436
1021
437
def __del__(self):
438
self.disable_hook = None
1022
439
self.disable()
1023
1024
def init_checker(self):
1025
# Schedule a new checker to be started an 'interval' from now,
1026
# and every interval from then on.
1027
if self.checker_initiator_tag is not None:
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
1031
self.start_checker)
1032
# Schedule a disable() when 'timeout' has passed
1033
if self.disable_initiator_tag is not None:
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
1037
# Also start a new checker *right now*.
1038
self.start_checker()
1039
1040
def checker_callback(self, source, condition, connection,
1041
command):
440
441
def checker_callback(self, pid, condition, command):
1042
442
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
1045
connection.close()
1046
self.checker.join()
1047
443
self.checker_callback_tag = None
1048
444
self.checker = None
1049
1050
if returncode >= 0:
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
1053
if self.last_checker_status == 0:
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1054
448
logger.info("Checker for %(name)s succeeded",
1055
449
vars(self))
1056
450
self.checked_ok()
1057
451
else:
1058
logger.info("Checker for %(name)s failed", vars(self))
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1059
454
else:
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
1062
455
logger.warning("Checker for %(name)s crashed?",
1063
456
vars(self))
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."""
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
"""
1075
464
if timeout is None:
1076
465
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
1077
467
if self.disable_initiator_tag is not None:
1078
GLib.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
468
gobject.source_remove(self.disable_initiator_tag)
1080
469
if getattr(self, "enabled", False):
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
1083
473
self.expires = datetime.datetime.utcnow() + timeout
1084
474
1085
475
def need_approval(self):
1086
476
self.last_approval_request = datetime.datetime.utcnow()
1087
477
1088
478
def start_checker(self):
1089
479
"""Start a new checker subprocess if one is not running.
1090
480
1091
481
If a checker already exists, leave it running and do
1092
482
nothing."""
1093
483
# The reason for not killing a running checker is that if we
1094
# did that, and if a checker (for some reason) started running
1095
# slowly and taking more than 'interval' time, then the client
1096
# would inevitably timeout, since no checker would get a
1097
# chance to run to completion. If we instead leave running
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
1098
488
# checkers alone, the checker would have to take more time
1099
489
# than 'timeout' for the client to be disabled, which is as it
1100
490
# should be.
1101
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
1104
self.checker.join()
1105
self.checker = None
491
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
self.current_checker_command)
1106
505
# Start a new checker if needed
1107
506
if self.checker is None:
1108
# Escape attributes for the shell
1109
escaped_attrs = {
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
1112
507
try:
1113
command = self.checker_command % escaped_attrs
1114
except TypeError as error:
1115
logger.error('Could not format string "%s"',
1116
self.checker_command,
1117
exc_info=error)
1118
return True # Try again later
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
1119
526
self.current_checker_command = command
1120
logger.info("Starting checker %r for %s", command,
1121
self.name)
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1128
# created wnull.
1129
popen_args = {"close_fds": True,
1130
"shell": True,
1131
"cwd": "/"}
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1135
"stderr": wnull})
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1138
target=call_pipe,
1139
args=(pipe[1], subprocess.call, command),
1140
kwargs=popen_args)
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
550
# Re-run this periodically if run by gobject.timeout_add
1146
551
return True
1147
552
1148
553
def stop_checker(self):
1149
554
"""Force the checker process, if any, to stop."""
1150
555
if self.checker_callback_tag:
1151
GLib.source_remove(self.checker_callback_tag)
556
gobject.source_remove(self.checker_callback_tag)
1152
557
self.checker_callback_tag = None
1153
558
if getattr(self, "checker", None) is None:
1154
559
return
1155
560
logger.debug("Stopping checker for %(name)s", vars(self))
1156
self.checker.terminate()
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
1157
569
self.checker = None
1158
570
1159
571
1160
def dbus_service_property(dbus_interface,
1161
signature="v",
1162
access="readwrite",
1163
byte_arrays=False):
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
1164
574
"""Decorators for marking methods of a DBusObjectWithProperties to
1165
575
become properties on the D-Bus.
1166
576
1167
577
The decorated method will be called with no arguments by "Get"
1168
578
and with one argument by "Set".
1169
579
1170
580
The parameters, where they are supported, are the same as
1171
581
dbus.service.method, except there is only "signature", since the
1172
582
type from Get() and the type sent to Set() is the same.
1175
585
# "Set" method, so we fail early here:
1176
586
if byte_arrays and signature != "ay":
1177
587
raise ValueError("Byte arrays not supported for non-'ay'"
1178
" signature {!r}".format(signature))
1179
588
" signature %r" % signature)
1180
589
def decorator(func):
1181
590
func._dbus_is_property = True
1182
591
func._dbus_interface = dbus_interface
1185
594
func._dbus_name = func.__name__
1186
595
if func._dbus_name.endswith("_dbus_property"):
1187
596
func._dbus_name = func._dbus_name[:-14]
1188
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1189
return func
1190
1191
return decorator
1192
1193
1194
def dbus_interface_annotations(dbus_interface):
1195
"""Decorator for marking functions returning interface annotations
1196
1197
Usage:
1198
1199
@dbus_interface_annotations("org.example.Interface")
1200
def _foo(self): # Function name does not matter
1201
return {"org.freedesktop.DBus.Deprecated": "true",
1202
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1203
"false"}
1204
"""
1205
1206
def decorator(func):
1207
func._dbus_is_interface = True
1208
func._dbus_interface = dbus_interface
1209
func._dbus_name = dbus_interface
1210
return func
1211
1212
return decorator
1213
1214
1215
def dbus_annotations(annotations):
1216
"""Decorator to annotate D-Bus methods, signals or properties
1217
Usage:
1218
1219
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1220
"org.freedesktop.DBus.Property."
1221
"EmitsChangedSignal": "false"})
1222
@dbus_service_property("org.example.Interface", signature="b",
1223
access="r")
1224
def Property_dbus_property(self):
1225
return dbus.Boolean(False)
1226
1227
See also the DBusObjectWithAnnotations class.
1228
"""
1229
1230
def decorator(func):
1231
func._dbus_annotations = annotations
1232
return func
1233
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
598
return func
1234
599
return decorator
1235
600
1236
601
1237
602
class DBusPropertyException(dbus.exceptions.DBusException):
1238
603
"""A base class for D-Bus property-related exceptions
1239
604
"""
1240
pass
605
def __unicode__(self):
606
return unicode(str(self))
1241
607
1242
608
1243
609
class DBusPropertyAccessException(DBusPropertyException):
1252
618
pass
1253
619
1254
620
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):
621
class DBusObjectWithProperties(dbus.service.Object):
1345
622
"""A D-Bus object with properties.
1346
623
1347
624
Classes inheriting from this can use the dbus_service_property
1348
625
decorator to expose methods as D-Bus properties. It exposes the
1349
626
standard Get(), Set(), and GetAll() methods on the D-Bus.
1350
627
"""
1351
628
629
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
632
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
635
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
640
1352
641
def _get_dbus_property(self, interface_name, property_name):
1353
642
"""Returns a bound method if one exists which is a D-Bus
1354
643
property with the specified name and interface.
1355
644
"""
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
1359
648
if (value._dbus_name == property_name
1360
649
and value._dbus_interface == interface_name):
1361
650
return value.__get__(self)
1362
651
1363
652
# No such property
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1366
1367
@classmethod
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1373
for attr in dir(x))
1374
if name is not None)
1375
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
1377
in_signature="ss",
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
656
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1378
658
out_signature="v")
1379
659
def Get(self, interface_name, property_name):
1380
660
"""Standard D-Bus property Get() method, see D-Bus standard.
1386
666
if not hasattr(value, "variant_level"):
1387
667
return value
1388
668
return type(value)(value, variant_level=value.variant_level+1)
1389
669
1390
670
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1391
671
def Set(self, interface_name, property_name, value):
1392
672
"""Standard D-Bus property Set() method, see D-Bus standard.
1398
678
# The byte_arrays option is not supported yet on
1399
679
# signatures other than "ay".
1400
680
if prop._dbus_signature != "ay":
1401
raise ValueError("Byte arrays not supported for non-"
1402
"'ay' signature {!r}"
1403
.format(prop._dbus_signature))
1404
value = dbus.ByteArray(b''.join(chr(byte)
1405
for byte in value))
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
1406
684
prop(value)
1407
1408
@dbus.service.method(dbus.PROPERTIES_IFACE,
1409
in_signature="s",
685
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1410
687
out_signature="a{sv}")
1411
688
def GetAll(self, interface_name):
1412
689
"""Standard D-Bus property GetAll() method, see D-Bus
1413
690
standard.
1414
691
1415
692
Note: Will not include properties with access="write".
1416
693
"""
1417
properties = {}
1418
for name, prop in self._get_all_dbus_things("property"):
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
1419
696
if (interface_name
1420
697
and interface_name != prop._dbus_interface):
1421
698
# Interface non-empty but did not match
1425
702
continue
1426
703
value = prop()
1427
704
if not hasattr(value, "variant_level"):
1428
properties[name] = value
705
all[name] = value
1429
706
continue
1430
properties[name] = type(value)(
1431
value, variant_level=value.variant_level + 1)
1432
return dbus.Dictionary(properties, signature="sv")
1433
1434
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1435
def PropertiesChanged(self, interface_name, changed_properties,
1436
invalidated_properties):
1437
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1438
standard.
1439
"""
1440
pass
1441
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
710
1442
711
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1443
712
out_signature="s",
1444
713
path_keyword='object_path',
1445
714
connection_keyword='connection')
1446
715
def Introspect(self, object_path, connection):
1447
"""Overloading of standard D-Bus method.
1448
1449
Inserts property tags and interface annotation tags.
716
"""Standard D-Bus method, overloaded to insert property tags.
1450
717
"""
1451
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1452
object_path,
1453
connection)
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
connection)
1454
720
try:
1455
721
document = xml.dom.minidom.parseString(xmlstring)
1456
1457
722
def make_tag(document, name, prop):
1458
723
e = document.createElement("property")
1459
724
e.setAttribute("name", name)
1460
725
e.setAttribute("type", prop._dbus_signature)
1461
726
e.setAttribute("access", prop._dbus_access)
1462
727
return e
1463
1464
728
for if_tag in document.getElementsByTagName("interface"):
1465
# Add property tags
1466
729
for tag in (make_tag(document, name, prop)
1467
730
for name, prop
1468
in self._get_all_dbus_things("property")
731
in self._get_all_dbus_properties()
1469
732
if prop._dbus_interface
1470
733
== if_tag.getAttribute("name")):
1471
734
if_tag.appendChild(tag)
1472
# Add annotation tags for properties
1473
for tag in if_tag.getElementsByTagName("property"):
1474
annots = dict()
1475
for name, prop in self._get_all_dbus_things(
1476
"property"):
1477
if (name == tag.getAttribute("name")
1478
and prop._dbus_interface
1479
== if_tag.getAttribute("name")):
1480
annots.update(getattr(
1481
prop, "_dbus_annotations", {}))
1482
for name, value in annots.items():
1483
ann_tag = document.createElement(
1484
"annotation")
1485
ann_tag.setAttribute("name", name)
1486
ann_tag.setAttribute("value", value)
1487
tag.appendChild(ann_tag)
1488
735
# Add the names to the return values for the
1489
736
# "org.freedesktop.DBus.Properties" methods
1490
737
if (if_tag.getAttribute("name")
1505
752
except (AttributeError, xml.dom.DOMException,
1506
753
xml.parsers.expat.ExpatError) as error:
1507
754
logger.error("Failed to override Introspection method",
1508
exc_info=error)
1509
return xmlstring
1510
1511
1512
try:
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1516
1517
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1520
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1525
1526
Note: No signals are sent automatically; they must be sent
1527
manually.
1528
"""
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1538
pass
1539
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1542
pass
1543
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1545
out_signature="s",
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1550
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1553
"""
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1555
object_path,
1556
connection)
1557
try:
1558
document = xml.dom.minidom.parseString(xmlstring)
1559
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1569
== "out"):
1570
arg.setAttribute(
1571
"name",
1572
"objpath_interfaces"
1573
"_and_properties")
1574
xmlstring = document.toxml("utf-8")
1575
document.unlink()
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1579
exc_info=error)
1580
return xmlstring
1581
1582
1583
def datetime_to_dbus(dt, variant_level=0):
755
error)
756
return xmlstring
757
758
759
def datetime_to_dbus (dt, variant_level=0):
1584
760
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1585
761
if dt is None:
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1588
1589
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1591
"""A class decorator; applied to a subclass of
1592
dbus.service.Object, it will add alternate D-Bus attributes with
1593
interface names according to the "alt_interface_names" mapping.
1594
Usage:
1595
1596
@alternate_dbus_interfaces({"org.example.Interface":
1597
"net.example.AlternateInterface"})
1598
class SampleDBusObject(dbus.service.Object):
1599
@dbus.service.method("org.example.Interface")
1600
def SampleDBusMethod():
1601
pass
1602
1603
The above "SampleDBusMethod" on "SampleDBusObject" will be
1604
reachable via two interfaces: "org.example.Interface" and
1605
"net.example.AlternateInterface", the latter of which will have
1606
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1607
"true", unless "deprecate" is passed with a False value.
1608
1609
This works for methods and signals, and also for D-Bus properties
1610
(from DBusObjectWithProperties) and interfaces (from the
1611
dbus_interface_annotations decorator).
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1612
770
"""
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):
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1621
778
# Ignore non-D-Bus attributes, and D-Bus attributes
1622
779
# with the wrong interface name
1623
780
if (not hasattr(attribute, "_dbus_interface")
1624
or not attribute._dbus_interface.startswith(
1625
orig_interface_name)):
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1626
783
continue
1627
784
# Create an alternate D-Bus interface name based on
1628
785
# the current name
1629
alt_interface = attribute._dbus_interface.replace(
1630
orig_interface_name, alt_interface_name)
1631
interface_names.add(alt_interface)
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1632
789
# Is this a D-Bus signal?
1633
790
if getattr(attribute, "_dbus_is_signal", False):
1634
# Extract the original non-method undecorated
1635
# function by black magic
1636
if sys.version_info.major == 2:
1637
nonmethod_func = (dict(
791
# Extract the original non-method function by
792
# black magic
793
nonmethod_func = (dict(
1638
794
zip(attribute.func_code.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
else:
1642
nonmethod_func = (dict(
1643
zip(attribute.__code__.co_freevars,
1644
attribute.__closure__))
1645
["func"].cell_contents)
795
attribute.__closure__))["func"]
796
.cell_contents)
1646
797
# Create a new, but exactly alike, function
1647
798
# object, and decorate it to be a new D-Bus signal
1648
799
# with the alternate D-Bus interface name
1649
new_function = copy_function(nonmethod_func)
1650
new_function = (dbus.service.signal(
1651
alt_interface,
1652
attribute._dbus_signature)(new_function))
1653
# Copy annotations, if any
1654
try:
1655
new_function._dbus_annotations = dict(
1656
attribute._dbus_annotations)
1657
except AttributeError:
1658
pass
1659
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
803
(types.FunctionType(
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
1660
809
# Define a creator of a function to call both the
1661
# original and alternate functions, so both the
1662
# original and alternate signals gets sent when
1663
# the function is called
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1664
812
def fixscope(func1, func2):
1665
813
"""This function is a scope container to pass
1666
814
func1 and func2 to the "call_both" function
1667
815
outside of its arguments"""
1668
1669
@functools.wraps(func2)
1670
816
def call_both(*args, **kwargs):
1671
817
"""This function will emit two D-Bus
1672
818
signals by calling func1 and func2"""
1673
819
func1(*args, **kwargs)
1674
820
func2(*args, **kwargs)
1675
# Make wrapper function look like a D-Bus
1676
# signal
1677
for name, attr in inspect.getmembers(func2):
1678
if name.startswith("_dbus_"):
1679
setattr(call_both, name, attr)
1680
1681
821
return call_both
1682
822
# Create the "call_both" function and add it to
1683
823
# the class
1684
attr[attrname] = fixscope(attribute, new_function)
824
attr[attrname] = fixscope(attribute,
825
new_function)
1685
826
# Is this a D-Bus method?
1686
827
elif getattr(attribute, "_dbus_is_method", False):
1687
828
# Create a new, but exactly alike, function
1688
829
# object. Decorate it to be a new D-Bus method
1689
830
# with the alternate D-Bus interface name. Add it
1690
831
# to the class.
1691
attr[attrname] = (
1692
dbus.service.method(
1693
alt_interface,
1694
attribute._dbus_in_signature,
1695
attribute._dbus_out_signature)
1696
(copy_function(attribute)))
1697
# Copy annotations, if any
1698
try:
1699
attr[attrname]._dbus_annotations = dict(
1700
attribute._dbus_annotations)
1701
except AttributeError:
1702
pass
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
1703
842
# Is this a D-Bus property?
1704
843
elif getattr(attribute, "_dbus_is_property", False):
1705
844
# Create a new, but exactly alike, function
1706
845
# object, and decorate it to be a new D-Bus
1707
846
# property with the alternate D-Bus interface
1708
847
# name. Add it to the class.
1709
attr[attrname] = (dbus_service_property(
1710
alt_interface, attribute._dbus_signature,
1711
attribute._dbus_access,
1712
attribute._dbus_get_args_options
1713
["byte_arrays"])
1714
(copy_function(attribute)))
1715
# Copy annotations, if any
1716
try:
1717
attr[attrname]._dbus_annotations = dict(
1718
attribute._dbus_annotations)
1719
except AttributeError:
1720
pass
1721
# Is this a D-Bus interface?
1722
elif getattr(attribute, "_dbus_is_interface", False):
1723
# Create a new, but exactly alike, function
1724
# object. Decorate it to be a new D-Bus interface
1725
# with the alternate D-Bus interface name. Add it
1726
# to the class.
1727
attr[attrname] = (
1728
dbus_interface_annotations(alt_interface)
1729
(copy_function(attribute)))
1730
if deprecate:
1731
# Deprecate all alternate interfaces
1732
iname = "_AlternateDBusNames_interface_annotation{}"
1733
for interface_name in interface_names:
1734
1735
@dbus_interface_annotations(interface_name)
1736
def func(self):
1737
return {"org.freedesktop.DBus.Deprecated":
1738
"true"}
1739
# Find an unused name
1740
for aname in (iname.format(i)
1741
for i in itertools.count()):
1742
if aname not in attr:
1743
attr[aname] = func
1744
break
1745
if interface_names:
1746
# Replace the class with a new subclass of it with
1747
# methods, signals, etc. as created above.
1748
if sys.version_info.major == 2:
1749
cls = type(b"{}Alternate".format(cls.__name__),
1750
(cls, ), attr)
1751
else:
1752
cls = type("{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
return cls
1755
1756
return wrapper
1757
1758
1759
@alternate_dbus_interfaces({"se.recompile.Mandos":
1760
"se.bsnet.fukt.Mandos"})
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1761
863
class ClientDBus(Client, DBusObjectWithProperties):
1762
864
"""A Client class using D-Bus
1763
865
1764
866
Attributes:
1765
867
dbus_object_path: dbus.ObjectPath
1766
868
bus: dbus.SystemBus()
1767
869
"""
1768
870
1769
871
runtime_expansions = (Client.runtime_expansions
1770
+ ("dbus_object_path", ))
1771
1772
_interface = "se.recompile.Mandos.Client"
1773
872
+ ("dbus_object_path",))
873
1774
874
# dbus.service.Object doesn't use super(), so we can't either.
1775
1776
def __init__(self, bus=None, *args, **kwargs):
875
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1777
878
self.bus = bus
1778
879
Client.__init__(self, *args, **kwargs)
1779
880
# Only now, when this client is initialized, can it show up on
1780
881
# the D-Bus
1781
client_object_name = str(self.name).translate(
882
client_object_name = unicode(self.name).translate(
1782
883
{ord("."): ord("_"),
1783
884
ord("-"): ord("_")})
1784
self.dbus_object_path = dbus.ObjectPath(
1785
"/clients/" + client_object_name)
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1786
887
DBusObjectWithProperties.__init__(self, self.bus,
1787
888
self.dbus_object_path)
1788
1789
def notifychangeproperty(transform_func, dbus_name,
1790
type_func=lambda x: x,
1791
variant_level=1,
1792
invalidate_only=False,
1793
_interface=_interface):
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
1794
893
""" Modify a variable so that it's a property which announces
1795
894
its changes to DBus.
1796
895
1801
900
to the D-Bus. Default: no transform
1802
901
variant_level: D-Bus variant level. Default: 1
1803
902
"""
1804
attrname = "_{}".format(dbus_name)
1805
903
attrname = "_{0}".format(dbus_name)
1806
904
def setter(self, value):
1807
905
if hasattr(self, "dbus_object_path"):
1808
906
if (not hasattr(self, attrname) or
1809
907
type_func(getattr(self, attrname, None))
1810
908
!= type_func(value)):
1811
if invalidate_only:
1812
self.PropertiesChanged(
1813
_interface, dbus.Dictionary(),
1814
dbus.Array((dbus_name, )))
1815
else:
1816
dbus_value = transform_func(
1817
type_func(value),
1818
variant_level=variant_level)
1819
self.PropertyChanged(dbus.String(dbus_name),
1820
dbus_value)
1821
self.PropertiesChanged(
1822
_interface,
1823
dbus.Dictionary({dbus.String(dbus_name):
1824
dbus_value}),
1825
dbus.Array())
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_value)
1826
914
setattr(self, attrname, value)
1827
915
1828
916
return property(lambda self: getattr(self, attrname), setter)
1829
917
918
1830
919
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1831
920
approvals_pending = notifychangeproperty(dbus.Boolean,
1832
921
"ApprovalPending",
1833
type_func=bool)
922
type_func = bool)
1834
923
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1835
924
last_enabled = notifychangeproperty(datetime_to_dbus,
1836
925
"LastEnabled")
1837
checker = notifychangeproperty(
1838
dbus.Boolean, "CheckerRunning",
1839
type_func=lambda checker: checker is not None)
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1840
929
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1841
930
"LastCheckedOK")
1842
last_checker_status = notifychangeproperty(dbus.Int16,
1843
"LastCheckerStatus")
1844
931
last_approval_request = notifychangeproperty(
1845
932
datetime_to_dbus, "LastApprovalRequest")
1846
933
approved_by_default = notifychangeproperty(dbus.Boolean,
1847
934
"ApprovedByDefault")
1848
approval_delay = notifychangeproperty(
1849
dbus.UInt64, "ApprovalDelay",
1850
type_func=lambda td: td.total_seconds() * 1000)
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1851
939
approval_duration = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDuration",
1853
type_func=lambda td: td.total_seconds() * 1000)
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1854
942
host = notifychangeproperty(dbus.String, "Host")
1855
timeout = notifychangeproperty(
1856
dbus.UInt64, "Timeout",
1857
type_func=lambda td: td.total_seconds() * 1000)
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1858
946
extended_timeout = notifychangeproperty(
1859
dbus.UInt64, "ExtendedTimeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
1861
interval = notifychangeproperty(
1862
dbus.UInt64, "Interval",
1863
type_func=lambda td: td.total_seconds() * 1000)
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
1864
953
checker_command = notifychangeproperty(dbus.String, "Checker")
1865
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1866
invalidate_only=True)
1867
954
1868
955
del notifychangeproperty
1869
956
1870
957
def __del__(self, *args, **kwargs):
1871
958
try:
1872
959
self.remove_from_connection()
1875
962
if hasattr(DBusObjectWithProperties, "__del__"):
1876
963
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1877
964
Client.__del__(self, *args, **kwargs)
1878
1879
def checker_callback(self, source, condition,
1880
connection, command, *args, **kwargs):
1881
ret = Client.checker_callback(self, source, condition,
1882
connection, command, *args,
1883
**kwargs)
1884
exitstatus = self.last_checker_status
1885
if exitstatus >= 0:
965
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
1886
972
# Emit D-Bus signal
1887
973
self.CheckerCompleted(dbus.Int16(exitstatus),
1888
# This is specific to GNU libC
1889
dbus.Int64(exitstatus << 8),
974
dbus.Int64(condition),
1890
975
dbus.String(command))
1891
976
else:
1892
977
# Emit D-Bus signal
1893
978
self.CheckerCompleted(dbus.Int16(-1),
1894
dbus.Int64(
1895
# This is specific to GNU libC
1896
(exitstatus << 8)
1897
| self.last_checker_signal),
979
dbus.Int64(condition),
1898
980
dbus.String(command))
1899
return ret
1900
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
984
1901
985
def start_checker(self, *args, **kwargs):
1902
old_checker_pid = getattr(self.checker, "pid", None)
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1903
991
r = Client.start_checker(self, *args, **kwargs)
1904
992
# Only if new checker process was started
1905
993
if (self.checker is not None
1907
995
# Emit D-Bus signal
1908
996
self.CheckerStarted(self.current_checker_command)
1909
997
return r
1910
998
1911
999
def _reset_approved(self):
1912
self.approved = None
1000
self._approved = None
1913
1001
return False
1914
1002
1915
1003
def approve(self, value=True):
1916
self.approved = value
1917
GLib.timeout_add(int(self.approval_duration.total_seconds()
1918
* 1000), self._reset_approved)
1919
1004
self.send_changedstate()
1920
1921
# D-Bus methods, signals & properties
1922
1923
# Interfaces
1924
1925
# Signals
1926
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1013
1014
## Signals
1015
1927
1016
# CheckerCompleted - signal
1928
1017
@dbus.service.signal(_interface, signature="nxs")
1929
1018
def CheckerCompleted(self, exitcode, waitstatus, command):
1930
1019
"D-Bus signal"
1931
1020
pass
1932
1021
1933
1022
# CheckerStarted - signal
1934
1023
@dbus.service.signal(_interface, signature="s")
1935
1024
def CheckerStarted(self, command):
1936
1025
"D-Bus signal"
1937
1026
pass
1938
1027
1939
1028
# PropertyChanged - signal
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
1029
@dbus.service.signal(_interface, signature="sv")
1942
1030
def PropertyChanged(self, property, value):
1943
1031
"D-Bus signal"
1944
1032
pass
1945
1033
1946
1034
# GotSecret - signal
1947
1035
@dbus.service.signal(_interface)
1948
1036
def GotSecret(self):
1951
1039
server to mandos-client
1952
1040
"""
1953
1041
pass
1954
1042
1955
1043
# Rejected - signal
1956
1044
@dbus.service.signal(_interface, signature="s")
1957
1045
def Rejected(self, reason):
1958
1046
"D-Bus signal"
1959
1047
pass
1960
1048
1961
1049
# NeedApproval - signal
1962
1050
@dbus.service.signal(_interface, signature="tb")
1963
1051
def NeedApproval(self, timeout, default):
1964
1052
"D-Bus signal"
1965
1053
return self.need_approval()
1966
1967
# Methods
1968
1054
1055
## Methods
1056
1969
1057
# Approve - method
1970
1058
@dbus.service.method(_interface, in_signature="b")
1971
1059
def Approve(self, value):
1972
1060
self.approve(value)
1973
1061
1974
1062
# CheckedOK - method
1975
1063
@dbus.service.method(_interface)
1976
1064
def CheckedOK(self):
1977
1065
self.checked_ok()
1978
1066
1979
1067
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1981
1068
@dbus.service.method(_interface)
1982
1069
def Enable(self):
1983
1070
"D-Bus method"
1984
1071
self.enable()
1985
1072
1986
1073
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1988
1074
@dbus.service.method(_interface)
1989
1075
def StartChecker(self):
1990
1076
"D-Bus method"
1991
1077
self.start_checker()
1992
1078
1993
1079
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1995
1080
@dbus.service.method(_interface)
1996
1081
def Disable(self):
1997
1082
"D-Bus method"
1998
1083
self.disable()
1999
1084
2000
1085
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2002
1086
@dbus.service.method(_interface)
2003
1087
def StopChecker(self):
2004
1088
self.stop_checker()
2005
2006
# Properties
2007
1089
1090
## Properties
1091
2008
1092
# ApprovalPending - property
2009
1093
@dbus_service_property(_interface, signature="b", access="read")
2010
1094
def ApprovalPending_dbus_property(self):
2011
1095
return dbus.Boolean(bool(self.approvals_pending))
2012
1096
2013
1097
# ApprovedByDefault - property
2014
@dbus_service_property(_interface,
2015
signature="b",
1098
@dbus_service_property(_interface, signature="b",
2016
1099
access="readwrite")
2017
1100
def ApprovedByDefault_dbus_property(self, value=None):
2018
1101
if value is None: # get
2019
1102
return dbus.Boolean(self.approved_by_default)
2020
1103
self.approved_by_default = bool(value)
2021
1104
2022
1105
# ApprovalDelay - property
2023
@dbus_service_property(_interface,
2024
signature="t",
1106
@dbus_service_property(_interface, signature="t",
2025
1107
access="readwrite")
2026
1108
def ApprovalDelay_dbus_property(self, value=None):
2027
1109
if value is None: # get
2028
return dbus.UInt64(self.approval_delay.total_seconds()
2029
* 1000)
1110
return dbus.UInt64(self.approval_delay_milliseconds())
2030
1111
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2031
1112
2032
1113
# ApprovalDuration - property
2033
@dbus_service_property(_interface,
2034
signature="t",
1114
@dbus_service_property(_interface, signature="t",
2035
1115
access="readwrite")
2036
1116
def ApprovalDuration_dbus_property(self, value=None):
2037
1117
if value is None: # get
2038
return dbus.UInt64(self.approval_duration.total_seconds()
2039
* 1000)
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
2040
1120
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2041
1121
2042
1122
# Name - property
2043
@dbus_annotations(
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2045
1123
@dbus_service_property(_interface, signature="s", access="read")
2046
1124
def Name_dbus_property(self):
2047
1125
return dbus.String(self.name)
2048
2049
# KeyID - property
2050
@dbus_annotations(
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
2055
1126
2056
1127
# Fingerprint - property
2057
@dbus_annotations(
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2059
1128
@dbus_service_property(_interface, signature="s", access="read")
2060
1129
def Fingerprint_dbus_property(self):
2061
1130
return dbus.String(self.fingerprint)
2062
1131
2063
1132
# Host - property
2064
@dbus_service_property(_interface,
2065
signature="s",
1133
@dbus_service_property(_interface, signature="s",
2066
1134
access="readwrite")
2067
1135
def Host_dbus_property(self, value=None):
2068
1136
if value is None: # get
2069
1137
return dbus.String(self.host)
2070
self.host = str(value)
2071
1138
self.host = value
1139
2072
1140
# Created - property
2073
@dbus_annotations(
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2075
1141
@dbus_service_property(_interface, signature="s", access="read")
2076
1142
def Created_dbus_property(self):
2077
return datetime_to_dbus(self.created)
2078
1143
return dbus.String(datetime_to_dbus(self.created))
1144
2079
1145
# LastEnabled - property
2080
1146
@dbus_service_property(_interface, signature="s", access="read")
2081
1147
def LastEnabled_dbus_property(self):
2082
1148
return datetime_to_dbus(self.last_enabled)
2083
1149
2084
1150
# Enabled - property
2085
@dbus_service_property(_interface,
2086
signature="b",
1151
@dbus_service_property(_interface, signature="b",
2087
1152
access="readwrite")
2088
1153
def Enabled_dbus_property(self, value=None):
2089
1154
if value is None: # get
2092
1157
self.enable()
2093
1158
else:
2094
1159
self.disable()
2095
1160
2096
1161
# LastCheckedOK - property
2097
@dbus_service_property(_interface,
2098
signature="s",
1162
@dbus_service_property(_interface, signature="s",
2099
1163
access="readwrite")
2100
1164
def LastCheckedOK_dbus_property(self, value=None):
2101
1165
if value is not None:
2102
1166
self.checked_ok()
2103
1167
return
2104
1168
return datetime_to_dbus(self.last_checked_ok)
2105
2106
# LastCheckerStatus - property
2107
@dbus_service_property(_interface, signature="n", access="read")
2108
def LastCheckerStatus_dbus_property(self):
2109
return dbus.Int16(self.last_checker_status)
2110
1169
2111
1170
# Expires - property
2112
1171
@dbus_service_property(_interface, signature="s", access="read")
2113
1172
def Expires_dbus_property(self):
2114
1173
return datetime_to_dbus(self.expires)
2115
1174
2116
1175
# LastApprovalRequest - property
2117
1176
@dbus_service_property(_interface, signature="s", access="read")
2118
1177
def LastApprovalRequest_dbus_property(self):
2119
1178
return datetime_to_dbus(self.last_approval_request)
2120
1179
2121
1180
# Timeout - property
2122
@dbus_service_property(_interface,
2123
signature="t",
1181
@dbus_service_property(_interface, signature="t",
2124
1182
access="readwrite")
2125
1183
def Timeout_dbus_property(self, value=None):
2126
1184
if value is None: # get
2127
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2128
old_timeout = self.timeout
1185
return dbus.UInt64(self.timeout_milliseconds())
2129
1186
self.timeout = datetime.timedelta(0, 0, 0, value)
2130
# Reschedule disabling
2131
if self.enabled:
2132
now = datetime.datetime.utcnow()
2133
self.expires += self.timeout - old_timeout
2134
if self.expires <= now:
2135
# The timeout has passed
2136
self.disable()
2137
else:
2138
if (getattr(self, "disable_initiator_tag", None)
2139
is None):
2140
return
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
2144
self.disable)
2145
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1207
2146
1208
# ExtendedTimeout - property
2147
@dbus_service_property(_interface,
2148
signature="t",
1209
@dbus_service_property(_interface, signature="t",
2149
1210
access="readwrite")
2150
1211
def ExtendedTimeout_dbus_property(self, value=None):
2151
1212
if value is None: # get
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
2153
* 1000)
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
2154
1214
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2155
1215
2156
1216
# Interval - property
2157
@dbus_service_property(_interface,
2158
signature="t",
1217
@dbus_service_property(_interface, signature="t",
2159
1218
access="readwrite")
2160
1219
def Interval_dbus_property(self, value=None):
2161
1220
if value is None: # get
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1221
return dbus.UInt64(self.interval_milliseconds())
2163
1222
self.interval = datetime.timedelta(0, 0, 0, value)
2164
1223
if getattr(self, "checker_initiator_tag", None) is None:
2165
1224
return
2166
if self.enabled:
2167
# Reschedule checker run
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
2172
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1230
2173
1231
# Checker - property
2174
@dbus_service_property(_interface,
2175
signature="s",
1232
@dbus_service_property(_interface, signature="s",
2176
1233
access="readwrite")
2177
1234
def Checker_dbus_property(self, value=None):
2178
1235
if value is None: # get
2179
1236
return dbus.String(self.checker_command)
2180
self.checker_command = str(value)
2181
1237
self.checker_command = value
1238
2182
1239
# CheckerRunning - property
2183
@dbus_service_property(_interface,
2184
signature="b",
1240
@dbus_service_property(_interface, signature="b",
2185
1241
access="readwrite")
2186
1242
def CheckerRunning_dbus_property(self, value=None):
2187
1243
if value is None: # get
2190
1246
self.start_checker()
2191
1247
else:
2192
1248
self.stop_checker()
2193
1249
2194
1250
# ObjectPath - property
2195
@dbus_annotations(
2196
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2197
"org.freedesktop.DBus.Deprecated": "true"})
2198
1251
@dbus_service_property(_interface, signature="o", access="read")
2199
1252
def ObjectPath_dbus_property(self):
2200
return self.dbus_object_path # is already a dbus.ObjectPath
2201
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1254
2202
1255
# Secret = property
2203
@dbus_annotations(
2204
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2205
"invalidates"})
2206
@dbus_service_property(_interface,
2207
signature="ay",
2208
access="write",
2209
byte_arrays=True)
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
2210
1258
def Secret_dbus_property(self, value):
2211
self.secret = bytes(value)
2212
1259
self.secret = str(value)
1260
2213
1261
del _interface
2214
1262
2215
1263
2216
1264
class ProxyClient(object):
2217
def __init__(self, child_pipe, key_id, fpr, address):
1265
def __init__(self, child_pipe, fpr, address):
2218
1266
self._pipe = child_pipe
2219
self._pipe.send(('init', key_id, fpr, address))
1267
self._pipe.send(('init', fpr, address))
2220
1268
if not self._pipe.recv():
2221
raise KeyError(key_id or fpr)
2222
1269
raise KeyError()
1270
2223
1271
def __getattribute__(self, name):
2224
if name == '_pipe':
1272
if(name == '_pipe'):
2225
1273
return super(ProxyClient, self).__getattribute__(name)
2226
1274
self._pipe.send(('getattr', name))
2227
1275
data = self._pipe.recv()
2228
1276
if data[0] == 'data':
2229
1277
return data[1]
2230
1278
if data[0] == 'function':
2231
2232
1279
def func(*args, **kwargs):
2233
1280
self._pipe.send(('funcall', name, args, kwargs))
2234
1281
return self._pipe.recv()[1]
2235
2236
1282
return func
2237
1283
2238
1284
def __setattr__(self, name, value):
2239
if name == '_pipe':
1285
if(name == '_pipe'):
2240
1286
return super(ProxyClient, self).__setattr__(name, value)
2241
1287
self._pipe.send(('setattr', name, value))
2242
1288
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
2243
1291
2244
1292
class ClientHandler(socketserver.BaseRequestHandler, object):
2245
1293
"""A class to handle client connections.
2246
1294
2247
1295
Instantiated once for each connection to handle it.
2248
1296
Note: This will run in its own forked process."""
2249
1297
2250
1298
def handle(self):
2251
1299
with contextlib.closing(self.server.child_pipe) as child_pipe:
2252
1300
logger.info("TCP connection from: %s",
2253
str(self.client_address))
1301
unicode(self.client_address))
2254
1302
logger.debug("Pipe FD: %d",
2255
1303
self.server.child_pipe.fileno())
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"))
1304
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1309
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1314
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1318
# "+DHE-DSS"))
2263
1319
# Use a fallback default, since this MUST be set.
2264
1320
priority = self.server.gnutls_priority
2265
1321
if priority is None:
2266
1322
priority = "NORMAL"
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
2269
None)
2270
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1326
2271
1327
# Start communication using the Mandos protocol
2272
1328
# Get protocol number
2273
1329
line = self.request.makefile().readline()
2274
1330
logger.debug("Protocol version: %r", line)
2275
1331
try:
2276
1332
if int(line.strip().split()[0]) > 1:
2277
raise RuntimeError(line)
1333
raise RuntimeError
2278
1334
except (ValueError, IndexError, RuntimeError) as error:
2279
1335
logger.error("Unknown protocol version: %s", error)
2280
1336
return
2281
1337
2282
1338
# Start GnuTLS connection
2283
1339
try:
2284
1340
session.handshake()
2285
except gnutls.Error as error:
1341
except gnutls.errors.GNUTLSError as error:
2286
1342
logger.warning("Handshake failed: %s", error)
2287
1343
# Do not run session.bye() here: the session is not
2288
1344
# established. Just abandon the request.
2289
1345
return
2290
1346
logger.debug("Handshake succeeded")
2291
1347
2292
1348
approval_required = False
2293
1349
try:
2294
if gnutls.has_rawpk:
2295
fpr = b""
2296
try:
2297
key_id = self.key_id(
2298
self.peer_certificate(session))
2299
except (TypeError, gnutls.Error) as error:
2300
logger.warning("Bad certificate: %s", error)
2301
return
2302
logger.debug("Key ID: %s", key_id)
2303
2304
else:
2305
key_id = b""
2306
try:
2307
fpr = self.fingerprint(
2308
self.peer_certificate(session))
2309
except (TypeError, gnutls.Error) as error:
2310
logger.warning("Bad certificate: %s", error)
2311
return
2312
logger.debug("Fingerprint: %s", fpr)
2313
2314
try:
2315
client = ProxyClient(child_pipe, key_id, fpr,
1350
try:
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1353
except (TypeError,
1354
gnutls.errors.GNUTLSError) as error:
1355
logger.warning("Bad certificate: %s", error)
1356
return
1357
logger.debug("Fingerprint: %s", fpr)
1358
1359
try:
1360
client = ProxyClient(child_pipe, fpr,
2316
1361
self.client_address)
2317
1362
except KeyError:
2318
1363
return
2319
1364
2320
1365
if client.approval_delay:
2321
1366
delay = client.approval_delay
2322
1367
client.approvals_pending += 1
2323
1368
approval_required = True
2324
1369
2325
1370
while True:
2326
1371
if not client.enabled:
2327
1372
logger.info("Client %s is disabled",
2328
client.name)
1373
client.name)
2329
1374
if self.server.use_dbus:
2330
1375
# Emit D-Bus signal
2331
1376
client.Rejected("Disabled")
2332
1377
return
2333
2334
if client.approved or not client.approval_delay:
2335
# We are approved or approval is disabled
1378
1379
if client._approved or not client.approval_delay:
1380
#We are approved or approval is disabled
2336
1381
break
2337
elif client.approved is None:
1382
elif client._approved is None:
2338
1383
logger.info("Client %s needs approval",
2339
1384
client.name)
2340
1385
if self.server.use_dbus:
2341
1386
# Emit D-Bus signal
2342
1387
client.NeedApproval(
2343
client.approval_delay.total_seconds()
2344
* 1000, client.approved_by_default)
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
2345
1390
else:
2346
1391
logger.warning("Client %s was not approved",
2347
1392
client.name)
2349
1394
# Emit D-Bus signal
2350
1395
client.Rejected("Denied")
2351
1396
return
2352
2353
# wait until timeout or approved
1397
1398
#wait until timeout or approved
2354
1399
time = datetime.datetime.now()
2355
1400
client.changedstate.acquire()
2356
client.changedstate.wait(delay.total_seconds())
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2357
1404
client.changedstate.release()
2358
1405
time2 = datetime.datetime.now()
2359
1406
if (time2 - time) >= delay:
2369
1416
break
2370
1417
else:
2371
1418
delay -= time2 - time
2372
2373
try:
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
2377
exc_info=error)
2378
return
2379
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
2380
1432
logger.info("Sending secret to %s", client.name)
2381
1433
# bump the timeout using extended_timeout
2382
client.bump_timeout(client.extended_timeout)
1434
client.checked_ok(client.extended_timeout)
2383
1435
if self.server.use_dbus:
2384
1436
# Emit D-Bus signal
2385
1437
client.GotSecret()
2386
1438
2387
1439
finally:
2388
1440
if approval_required:
2389
1441
client.approvals_pending -= 1
2390
1442
try:
2391
1443
session.bye()
2392
except gnutls.Error as error:
2393
logger.warning("GnuTLS bye failed",
2394
exc_info=error)
2395
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2396
1447
@staticmethod
2397
1448
def peer_certificate(session):
2398
"Return the peer's certificate as a bytestring"
2399
try:
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2401
gnutls.CTYPE_PEERS)
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2406
else:
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2411
valid_cert_types)
2412
# ...return invalid data
2413
return b""
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2414
1456
list_size = ctypes.c_uint(1)
2415
cert_list = (gnutls.certificate_get_peers
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2416
1459
(session._c_object, ctypes.byref(list_size)))
2417
1460
if not bool(cert_list) and list_size.value != 0:
2418
raise gnutls.Error("error getting peer certificate")
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2419
1463
if list_size.value == 0:
2420
1464
return None
2421
1465
cert = cert_list[0]
2422
1466
return ctypes.string_at(cert.data, cert.size)
2423
2424
@staticmethod
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2451
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
2456
return hex_key_id
2457
1467
2458
1468
@staticmethod
2459
1469
def fingerprint(openpgp):
2460
1470
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2461
1471
# New GnuTLS "datum" with the OpenPGP public key
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
2466
1477
# New empty GnuTLS certificate
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2469
1481
# Import the OpenPGP public key into the certificate
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2472
1486
# Verify the self signature in the key
2473
1487
crtverify = ctypes.c_uint()
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2476
1491
if crtverify.value != 0:
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
2479
=crtverify.value)
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2480
1495
# New buffer for the fingerprint
2481
1496
buf = ctypes.create_string_buffer(20)
2482
1497
buf_len = ctypes.c_size_t()
2483
1498
# Get the fingerprint from the certificate into the buffer
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2486
1502
# Deinit the certificate
2487
gnutls.openpgp_crt_deinit(crt)
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2488
1504
# Convert the buffer to a Python bytestring
2489
1505
fpr = ctypes.string_at(buf, buf_len.value)
2490
1506
# Convert the bytestring to hexadecimal notation
2491
hex_fpr = binascii.hexlify(fpr).upper()
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2492
1508
return hex_fpr
2493
1509
2494
1510
2495
1511
class MultiprocessingMixIn(object):
2496
1512
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2497
2498
1513
def sub_process_main(self, request, address):
2499
1514
try:
2500
1515
self.finish_request(request, address)
2501
except Exception:
1516
except:
2502
1517
self.handle_error(request, address)
2503
1518
self.close_request(request)
2504
1519
2505
1520
def process_request(self, request, address):
2506
1521
"""Start a new process to process the request."""
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
2509
1525
proc.start()
2510
1526
return proc
2511
1527
2512
1528
2513
1529
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2514
1530
""" adds a pipe to the MixIn """
2515
2516
1531
def process_request(self, request, client_address):
2517
1532
"""Overrides and wraps the original process_request().
2518
1533
2519
1534
This function creates a new pipe in self.pipe
2520
1535
"""
2521
1536
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2522
1537
2523
1538
proc = MultiprocessingMixIn.process_request(self, request,
2524
1539
client_address)
2525
1540
self.child_pipe.close()
2526
1541
self.add_pipe(parent_pipe, proc)
2527
1542
2528
1543
def add_pipe(self, parent_pipe, proc):
2529
1544
"""Dummy function; override as necessary"""
2530
raise NotImplementedError()
1545
raise NotImplementedError
2531
1546
2532
1547
2533
1548
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2534
1549
socketserver.TCPServer, object):
2535
1550
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2536
1551
2537
1552
Attributes:
2538
1553
enabled: Boolean; whether this server is activated yet
2539
1554
interface: None or a network interface name (string)
2540
1555
use_ipv6: Boolean; to use IPv6 or not
2541
1556
"""
2542
2543
1557
def __init__(self, server_address, RequestHandlerClass,
2544
interface=None,
2545
use_ipv6=True,
2546
socketfd=None):
2547
"""If socketfd is set, use that file descriptor instead of
2548
creating a new one with socket.socket().
2549
"""
1558
interface=None, use_ipv6=True):
2550
1559
self.interface = interface
2551
1560
if use_ipv6:
2552
1561
self.address_family = socket.AF_INET6
2553
if socketfd is not None:
2554
# Save the file descriptor
2555
self.socketfd = socketfd
2556
# Save the original socket.socket() function
2557
self.socket_socket = socket.socket
2558
2559
# To implement --socket, we monkey patch socket.socket.
2560
#
2561
# (When socketserver.TCPServer is a new-style class, we
2562
# could make self.socket into a property instead of monkey
2563
# patching socket.socket.)
2564
#
2565
# Create a one-time-only replacement for socket.socket()
2566
@functools.wraps(socket.socket)
2567
def socket_wrapper(*args, **kwargs):
2568
# Restore original function so subsequent calls are
2569
# not affected.
2570
socket.socket = self.socket_socket
2571
del self.socket_socket
2572
# This time only, return a new socket object from the
2573
# saved file descriptor.
2574
return socket.fromfd(self.socketfd, *args, **kwargs)
2575
# Replace socket.socket() function with wrapper
2576
socket.socket = socket_wrapper
2577
# The socketserver.TCPServer.__init__ will call
2578
# socket.socket(), which might be our replacement,
2579
# socket_wrapper(), if socketfd was set.
2580
1562
socketserver.TCPServer.__init__(self, server_address,
2581
1563
RequestHandlerClass)
2582
2583
1564
def server_bind(self):
2584
1565
"""This overrides the normal server_bind() function
2585
1566
to bind to an interface if one was specified, and also NOT to
2586
1567
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
2588
1568
if self.interface is not None:
2589
1569
if SO_BINDTODEVICE is None:
2590
# Fall back to a hard-coded value which seems to be
2591
# common enough.
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2594
try:
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2605
self.interface)
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
2609
else:
2610
raise
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1572
self.interface)
1573
else:
1574
try:
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
1587
self.interface)
1588
else:
1589
raise
2611
1590
# Only bind(2) the socket if we really need to.
2612
1591
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
2615
1592
if not self.server_address[0]:
2616
1593
if self.address_family == socket.AF_INET6:
2617
any_address = "::" # in6addr_any
1594
any_address = "::" # in6addr_any
2618
1595
else:
2619
any_address = "0.0.0.0" # INADDR_ANY
1596
any_address = socket.INADDR_ANY
2620
1597
self.server_address = (any_address,
2621
1598
self.server_address[1])
2622
1599
elif not self.server_address[1]:
2623
self.server_address = (self.server_address[0], 0)
1600
self.server_address = (self.server_address[0],
1601
0)
2624
1602
# if self.interface:
2625
1603
# self.server_address = (self.server_address[0],
2626
1604
# 0, # port
2632
1610
2633
1611
class MandosServer(IPv6_TCPServer):
2634
1612
"""Mandos server.
2635
1613
2636
1614
Attributes:
2637
1615
clients: set of Client objects
2638
1616
gnutls_priority GnuTLS priority string
2639
1617
use_dbus: Boolean; to emit D-Bus signals or not
2640
2641
Assumes a GLib.MainLoop event loop.
1618
1619
Assumes a gobject.MainLoop event loop.
2642
1620
"""
2643
2644
1621
def __init__(self, server_address, RequestHandlerClass,
2645
interface=None,
2646
use_ipv6=True,
2647
clients=None,
2648
gnutls_priority=None,
2649
use_dbus=True,
2650
socketfd=None):
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2651
1624
self.enabled = False
2652
1625
self.clients = clients
2653
1626
if self.clients is None:
2654
self.clients = {}
1627
self.clients = set()
2655
1628
self.use_dbus = use_dbus
2656
1629
self.gnutls_priority = gnutls_priority
2657
1630
IPv6_TCPServer.__init__(self, server_address,
2658
1631
RequestHandlerClass,
2659
interface=interface,
2660
use_ipv6=use_ipv6,
2661
socketfd=socketfd)
2662
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
2663
1634
def server_activate(self):
2664
1635
if self.enabled:
2665
1636
return socketserver.TCPServer.server_activate(self)
2666
1637
2667
1638
def enable(self):
2668
1639
self.enabled = True
2669
1640
2670
1641
def add_pipe(self, parent_pipe, proc):
2671
1642
# Call "handle_ipc" for both data and EOF events
2672
GLib.io_add_watch(
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2677
proc=proc))
2678
2679
def handle_ipc(self, source, condition,
2680
parent_pipe=None,
2681
proc=None,
2682
client_object=None):
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
1649
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
2683
1666
# error, or the other end of multiprocessing.Pipe has closed
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2685
1668
# Wait for other process to exit
2686
1669
proc.join()
2687
1670
return False
2688
1671
2689
1672
# Read a request from the child
2690
1673
request = parent_pipe.recv()
2691
1674
command = request[0]
2692
1675
2693
1676
if command == 'init':
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2697
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2700
continue
2701
if key_id and c.key_id == key_id:
2702
client = c
2703
break
2704
if fpr and c.fingerprint == fpr:
1677
fpr = request[1]
1678
address = request[2]
1679
1680
for c in self.clients:
1681
if c.fingerprint == fpr:
2705
1682
client = c
2706
1683
break
2707
1684
else:
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
1685
logger.info("Client not found for fingerprint: %s, ad"
1686
"dress: %s", fpr, address)
2710
1687
if self.use_dbus:
2711
1688
# Emit D-Bus signal
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
1689
mandos_dbus_service.ClientNotFound(fpr,
2713
1690
address[0])
2714
1691
parent_pipe.send(False)
2715
1692
return False
2716
2717
GLib.io_add_watch(
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2722
proc=proc,
2723
client_object=client))
1693
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
client))
2724
1702
parent_pipe.send(True)
2725
1703
# remove the old hook in favor of the new above hook on
2726
1704
# same fileno
2729
1707
funcname = request[1]
2730
1708
args = request[2]
2731
1709
kwargs = request[3]
2732
1710
2733
1711
parent_pipe.send(('data', getattr(client_object,
2734
1712
funcname)(*args,
2735
**kwargs)))
2736
1713
**kwargs)))
1714
2737
1715
if command == 'getattr':
2738
1716
attrname = request[1]
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
2742
1719
else:
2743
parent_pipe.send((
2744
'data', client_object.__getattribute__(attrname)))
2745
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1722
2746
1723
if command == 'setattr':
2747
1724
attrname = request[1]
2748
1725
value = request[2]
2749
1726
setattr(client_object, attrname, value)
2750
1727
2751
1728
return True
2752
1729
2753
1730
2754
def rfc3339_duration_to_delta(duration):
2755
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2756
2757
>>> rfc3339_duration_to_delta("P7D")
2758
datetime.timedelta(7)
2759
>>> rfc3339_duration_to_delta("PT60S")
2760
datetime.timedelta(0, 60)
2761
>>> rfc3339_duration_to_delta("PT60M")
2762
datetime.timedelta(0, 3600)
2763
>>> rfc3339_duration_to_delta("PT24H")
2764
datetime.timedelta(1)
2765
>>> rfc3339_duration_to_delta("P1W")
2766
datetime.timedelta(7)
2767
>>> rfc3339_duration_to_delta("PT5M30S")
2768
datetime.timedelta(0, 330)
2769
>>> rfc3339_duration_to_delta("P1DT3M20S")
2770
datetime.timedelta(1, 200)
2771
"""
2772
2773
# Parsing an RFC 3339 duration with regular expressions is not
2774
# possible - there would have to be multiple places for the same
2775
# values, like seconds. The current code, while more esoteric, is
2776
# cleaner without depending on a parsing library. If Python had a
2777
# built-in library for parsing we would use it, but we'd like to
2778
# avoid excessive use of external libraries.
2779
2780
# New type for defining tokens, syntax, and semantics all-in-one
2781
Token = collections.namedtuple("Token", (
2782
"regexp", # To match token; if "value" is not None, must have
2783
# a "group" containing digits
2784
"value", # datetime.timedelta or None
2785
"followers")) # Tokens valid after this token
2786
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2787
# the "duration" ABNF definition in RFC 3339, Appendix A.
2788
token_end = Token(re.compile(r"$"), None, frozenset())
2789
token_second = Token(re.compile(r"(\d+)S"),
2790
datetime.timedelta(seconds=1),
2791
frozenset((token_end, )))
2792
token_minute = Token(re.compile(r"(\d+)M"),
2793
datetime.timedelta(minutes=1),
2794
frozenset((token_second, token_end)))
2795
token_hour = Token(re.compile(r"(\d+)H"),
2796
datetime.timedelta(hours=1),
2797
frozenset((token_minute, token_end)))
2798
token_time = Token(re.compile(r"T"),
2799
None,
2800
frozenset((token_hour, token_minute,
2801
token_second)))
2802
token_day = Token(re.compile(r"(\d+)D"),
2803
datetime.timedelta(days=1),
2804
frozenset((token_time, token_end)))
2805
token_month = Token(re.compile(r"(\d+)M"),
2806
datetime.timedelta(weeks=4),
2807
frozenset((token_day, token_end)))
2808
token_year = Token(re.compile(r"(\d+)Y"),
2809
datetime.timedelta(weeks=52),
2810
frozenset((token_month, token_end)))
2811
token_week = Token(re.compile(r"(\d+)W"),
2812
datetime.timedelta(weeks=1),
2813
frozenset((token_end, )))
2814
token_duration = Token(re.compile(r"P"), None,
2815
frozenset((token_year, token_month,
2816
token_day, token_time,
2817
token_week)))
2818
# Define starting values:
2819
# Value so far
2820
value = datetime.timedelta()
2821
found_token = None
2822
# Following valid tokens
2823
followers = frozenset((token_duration, ))
2824
# String left to parse
2825
s = duration
2826
# Loop until end token is found
2827
while found_token is not token_end:
2828
# Search for any currently valid tokens
2829
for token in followers:
2830
match = token.regexp.match(s)
2831
if match is not None:
2832
# Token found
2833
if token.value is not None:
2834
# Value found, parse digits
2835
factor = int(match.group(1), 10)
2836
# Add to value so far
2837
value += factor * token.value
2838
# Strip token from string
2839
s = token.regexp.sub("", s, 1)
2840
# Go to found token
2841
found_token = token
2842
# Set valid next tokens
2843
followers = found_token.followers
2844
break
2845
else:
2846
# No currently valid tokens were found
2847
raise ValueError("Invalid RFC 3339 duration: {!r}"
2848
.format(duration))
2849
# End token found
2850
return value
2851
2852
2853
1731
def string_to_delta(interval):
2854
1732
"""Parse a string and return a datetime.timedelta
2855
1733
2856
1734
>>> string_to_delta('7d')
2857
1735
datetime.timedelta(7)
2858
1736
>>> string_to_delta('60s')
2866
1744
>>> string_to_delta('5m 30s')
2867
1745
datetime.timedelta(0, 330)
2868
1746
"""
2869
2870
try:
2871
return rfc3339_duration_to_delta(interval)
2872
except ValueError:
2873
pass
2874
2875
1747
timevalue = datetime.timedelta(0)
2876
1748
for s in interval.split():
2877
1749
try:
2878
suffix = s[-1]
1750
suffix = unicode(s[-1])
2879
1751
value = int(s[:-1])
2880
1752
if suffix == "d":
2881
1753
delta = datetime.timedelta(value)
2888
1760
elif suffix == "w":
2889
1761
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2890
1762
else:
2891
raise ValueError("Unknown suffix {!r}".format(suffix))
2892
except IndexError as e:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2893
1765
raise ValueError(*(e.args))
2894
1766
timevalue += delta
2895
1767
return timevalue
2896
1768
2897
1769
2898
def daemon(nochdir=False, noclose=False):
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
def daemon(nochdir = False, noclose = False):
2899
1795
"""See daemon(3). Standard BSD Unix function.
2900
1796
2901
1797
This should really exist as os.daemon, but it doesn't (yet)."""
2902
1798
if os.fork():
2903
1799
sys.exit()
2908
1804
sys.exit()
2909
1805
if not noclose:
2910
1806
# Close all standard open file descriptors
2911
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2912
1808
if not stat.S_ISCHR(os.fstat(null).st_mode):
2913
1809
raise OSError(errno.ENODEV,
2914
"{} not a character device"
2915
.format(os.devnull))
1810
"%s not a character device"
1811
% os.path.devnull)
2916
1812
os.dup2(null, sys.stdin.fileno())
2917
1813
os.dup2(null, sys.stdout.fileno())
2918
1814
os.dup2(null, sys.stderr.fileno())
2921
1817
2922
1818
2923
1819
def main():
2924
1820
2925
1821
##################################################################
2926
1822
# Parsing of options, both command line and config file
2927
1823
2928
1824
parser = argparse.ArgumentParser()
2929
1825
parser.add_argument("-v", "--version", action="version",
2930
version="%(prog)s {}".format(version),
1826
version = "%%(prog)s %s" % version,
2931
1827
help="show version number and exit")
2932
1828
parser.add_argument("-i", "--interface", metavar="IF",
2933
1829
help="Bind to interface IF")
2939
1835
help="Run self-test")
2940
1836
parser.add_argument("--debug", action="store_true",
2941
1837
help="Debug mode; run in foreground and log"
2942
" to terminal", default=None)
1838
" to terminal")
2943
1839
parser.add_argument("--debuglevel", metavar="LEVEL",
2944
1840
help="Debug level for stdout output")
2945
1841
parser.add_argument("--priority", help="GnuTLS"
2952
1848
" files")
2953
1849
parser.add_argument("--no-dbus", action="store_false",
2954
1850
dest="use_dbus", help="Do not provide D-Bus"
2955
" system bus interface", default=None)
1851
" system bus interface")
2956
1852
parser.add_argument("--no-ipv6", action="store_false",
2957
dest="use_ipv6", help="Do not use IPv6",
2958
default=None)
2959
parser.add_argument("--no-restore", action="store_false",
2960
dest="restore", help="Do not restore stored"
2961
" state", default=None)
2962
parser.add_argument("--socket", type=int,
2963
help="Specify a file descriptor to a network"
2964
" socket to use instead of creating one")
2965
parser.add_argument("--statedir", metavar="DIR",
2966
help="Directory to save/restore state in")
2967
parser.add_argument("--foreground", action="store_true",
2968
help="Run in foreground", default=None)
2969
parser.add_argument("--no-zeroconf", action="store_false",
2970
dest="zeroconf", help="Do not use Zeroconf",
2971
default=None)
2972
1853
dest="use_ipv6", help="Do not use IPv6")
2973
1854
options = parser.parse_args()
2974
1855
2975
1856
if options.check:
2976
1857
import doctest
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2979
1858
doctest.testmod()
1859
sys.exit()
1860
2980
1861
# Default values for config file for server-global settings
2981
if gnutls.has_rawpk:
2982
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2983
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2984
else:
2985
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2986
":+SIGN-DSA-SHA256")
2987
server_defaults = {"interface": "",
2988
"address": "",
2989
"port": "",
2990
"debug": "False",
2991
"priority": priority,
2992
"servicename": "Mandos",
2993
"use_dbus": "True",
2994
"use_ipv6": "True",
2995
"debuglevel": "",
2996
"restore": "True",
2997
"socket": "",
2998
"statedir": "/var/lib/mandos",
2999
"foreground": "False",
3000
"zeroconf": "True",
3001
}
3002
del priority
3003
1862
server_defaults = { "interface": "",
1863
"address": "",
1864
"port": "",
1865
"debug": "False",
1866
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1868
"servicename": "Mandos",
1869
"use_dbus": "True",
1870
"use_ipv6": "True",
1871
"debuglevel": "",
1872
}
1873
3004
1874
# Parse config file for server-global settings
3005
server_config = configparser.ConfigParser(server_defaults)
1875
server_config = configparser.SafeConfigParser(server_defaults)
3006
1876
del server_defaults
3007
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
1879
# Convert the SafeConfigParser object to a dict
3009
1880
server_settings = server_config.defaults()
3010
1881
# Use the appropriate methods on the non-string config options
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
1882
for option in ("debug", "use_dbus", "use_ipv6"):
3013
1883
server_settings[option] = server_config.getboolean("DEFAULT",
3014
1884
option)
3015
1885
if server_settings["port"]:
3016
1886
server_settings["port"] = server_config.getint("DEFAULT",
3017
1887
"port")
3018
if server_settings["socket"]:
3019
server_settings["socket"] = server_config.getint("DEFAULT",
3020
"socket")
3021
# Later, stdin will, and stdout and stderr might, be dup'ed
3022
# over with an opened os.devnull. But we don't want this to
3023
# happen with a supplied network socket.
3024
if 0 <= server_settings["socket"] <= 2:
3025
server_settings["socket"] = os.dup(server_settings
3026
["socket"])
3027
1888
del server_config
3028
1889
3029
1890
# Override the settings from the config file with command line
3030
1891
# options, if set.
3031
1892
for option in ("interface", "address", "port", "debug",
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
3035
1895
value = getattr(options, option)
3036
1896
if value is not None:
3037
1897
server_settings[option] = value
3038
1898
del options
3039
1899
# Force all strings to be unicode
3040
1900
for option in server_settings.keys():
3041
if isinstance(server_settings[option], bytes):
3042
server_settings[option] = (server_settings[option]
3043
.decode("utf-8"))
3044
# Force all boolean options to be boolean
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
3047
server_settings[option] = bool(server_settings[option])
3048
# Debug implies foreground
3049
if server_settings["debug"]:
3050
server_settings["foreground"] = True
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
3051
1903
# Now we have our good server settings in "server_settings"
3052
1904
3053
1905
##################################################################
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
1906
3060
1907
# For convenience
3061
1908
debug = server_settings["debug"]
3062
1909
debuglevel = server_settings["debuglevel"]
3063
1910
use_dbus = server_settings["use_dbus"]
3064
1911
use_ipv6 = server_settings["use_ipv6"]
3065
stored_state_path = os.path.join(server_settings["statedir"],
3066
stored_state_file)
3067
foreground = server_settings["foreground"]
3068
zeroconf = server_settings["zeroconf"]
3069
3070
if debug:
3071
initlogger(debug, logging.DEBUG)
3072
else:
3073
if not debuglevel:
3074
initlogger(debug)
3075
else:
3076
level = getattr(logging, debuglevel.upper())
3077
initlogger(debug, level)
3078
1912
3079
1913
if server_settings["servicename"] != "Mandos":
3080
syslogger.setFormatter(
3081
logging.Formatter('Mandos ({}) [%(process)d]:'
3082
' %(levelname)s: %(message)s'.format(
3083
server_settings["servicename"])))
3084
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
1918
3085
1919
# Parse config file with clients
3086
client_config = configparser.ConfigParser(Client.client_defaults)
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
3087
1929
client_config.read(os.path.join(server_settings["configdir"],
3088
1930
"clients.conf"))
3089
1931
3090
1932
global mandos_dbus_service
3091
1933
mandos_dbus_service = None
3092
3093
socketfd = None
3094
if server_settings["socket"] != "":
3095
socketfd = server_settings["socket"]
3096
tcp_server = MandosServer(
3097
(server_settings["address"], server_settings["port"]),
3098
ClientHandler,
3099
interface=(server_settings["interface"] or None),
3100
use_ipv6=use_ipv6,
3101
gnutls_priority=server_settings["priority"],
3102
use_dbus=use_dbus,
3103
socketfd=socketfd)
3104
if not foreground:
3105
pidfilename = "/run/mandos.pid"
3106
if not os.path.isdir("/run/."):
3107
pidfilename = "/var/run/mandos.pid"
3108
pidfile = None
3109
try:
3110
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3111
except IOError as e:
3112
logger.error("Could not open file %r", pidfilename,
3113
exc_info=e)
3114
3115
for name, group in (("_mandos", "_mandos"),
3116
("mandos", "mandos"),
3117
("nobody", "nogroup")):
3118
try:
3119
uid = pwd.getpwnam(name).pw_uid
3120
gid = pwd.getpwnam(group).pw_gid
3121
break
1934
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
1946
try:
1947
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
1950
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
1955
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
3122
1958
except KeyError:
3123
continue
3124
else:
3125
uid = 65534
3126
gid = 65534
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
3127
1965
try:
3128
1966
os.setgid(gid)
3129
1967
os.setuid(uid)
3130
if debug:
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3132
gid))
3133
1968
except OSError as error:
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
3137
raise
3138
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1979
3139
1980
if debug:
3140
1981
# Enable all possible GnuTLS debugging
3141
1982
3142
1983
# "Use a log level over 10 to enable all debugging options."
3143
1984
# - GnuTLS manual
3144
gnutls.global_set_log_level(11)
3145
3146
@gnutls.log_func
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1986
1987
@gnutls.library.types.gnutls_log_func
3147
1988
def debug_gnutls(level, string):
3148
1989
logger.debug("GnuTLS: %s", string[:-1])
3149
3150
gnutls.global_set_log_function(debug_gnutls)
3151
1990
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1993
3152
1994
# Redirect stdin so all checkers get /dev/null
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3154
1996
os.dup2(null, sys.stdin.fileno())
3155
1997
if null > 2:
3156
1998
os.close(null)
3157
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
3158
2003
# Need to fork before connecting to D-Bus
3159
if not foreground:
2004
if not debug:
3160
2005
# Close all input and output, do double fork, etc.
3161
2006
daemon()
3162
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
3166
GLib.threads_init()
3167
2007
3168
2008
global main_loop
3169
2009
# From the Avahi example code
3170
DBusGMainLoop(set_as_default=True)
3171
main_loop = GLib.MainLoop()
2010
DBusGMainLoop(set_as_default=True )
2011
main_loop = gobject.MainLoop()
3172
2012
bus = dbus.SystemBus()
3173
2013
# End of Avahi example code
3174
2014
if use_dbus:
3175
2015
try:
3176
2016
bus_name = dbus.service.BusName("se.recompile.Mandos",
3177
bus,
3178
do_not_queue=True)
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3181
do_not_queue=True)
3182
except dbus.exceptions.DBusException as e:
3183
logger.error("Disabling D-Bus:", exc_info=e)
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
3184
2023
use_dbus = False
3185
2024
server_settings["use_dbus"] = False
3186
2025
tcp_server.use_dbus = False
3187
if zeroconf:
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3192
protocol=protocol,
3193
bus=bus)
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
3197
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2033
3198
2034
global multiprocessing_manager
3199
2035
multiprocessing_manager = multiprocessing.Manager()
3200
2036
3201
2037
client_class = Client
3202
2038
if use_dbus:
3203
client_class = functools.partial(ClientDBus, bus=bus)
3204
3205
client_settings = Client.config_parser(client_config)
3206
old_client_settings = {}
3207
clients_data = {}
3208
3209
# This is used to redirect stdout and stderr for checker processes
3210
global wnull
3211
wnull = open(os.devnull, "w") # A writable /dev/null
3212
# Only used if server is running in foreground but not in debug
3213
# mode
3214
if debug or not foreground:
3215
wnull.close()
3216
3217
# Get client data and settings from last running state.
3218
if server_settings["restore"]:
3219
try:
3220
with open(stored_state_path, "rb") as stored_state:
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3223
stored_state)
3224
else:
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3228
# clients_data
3229
# .keys()
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3232
else key): value
3233
for key, value in
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3239
for k, v in
3240
clients_data[key].items()}
3241
clients_data[key] = value
3242
# .client_structure
3243
value["client_structure"] = [
3244
(s.decode("utf-8")
3245
if isinstance(s, bytes)
3246
else s) for s in
3247
value["client_structure"]]
3248
# .name & .host
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3257
# .keys()
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3261
else key): value
3262
for key, value in
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3265
# .host
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
3269
.decode("utf-8"))
3270
os.remove(stored_state_path)
3271
except IOError as e:
3272
if e.errno == errno.ENOENT:
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
3275
else:
3276
logger.critical("Could not load persistent state:",
3277
exc_info=e)
3278
raise
3279
except EOFError as e:
3280
logger.warning("Could not load persistent state: "
3281
"EOFError:",
3282
exc_info=e)
3283
3284
with PGPEngine() as pgp:
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
3288
continue
3289
3290
# Decide which value to use after restoring saved state.
3291
# We have three different values: Old config file,
3292
# new config file, and saved state.
3293
# New config value takes precedence if it differs from old
3294
# config value, otherwise use saved state.
3295
for name, value in client_settings[client_name].items():
3296
try:
3297
# For each value in new config, check if it
3298
# differs from the old config value (Except for
3299
# the "secret" attribute)
3300
if (name != "secret"
3301
and (value !=
3302
old_client_settings[client_name][name])):
3303
client[name] = value
3304
except KeyError:
3305
pass
3306
3307
# Clients who has passed its expire date can still be
3308
# enabled if its last checker was successful. A Client
3309
# whose checker succeeded before we stored its state is
3310
# assumed to have successfully run all checkers during
3311
# downtime.
3312
if client["enabled"]:
3313
if datetime.datetime.utcnow() >= client["expires"]:
3314
if not client["last_checked_ok"]:
3315
logger.warning(
3316
"disabling client {} - Client never "
3317
"performed a successful checker".format(
3318
client_name))
3319
client["enabled"] = False
3320
elif client["last_checker_status"] != 0:
3321
logger.warning(
3322
"disabling client {} - Client last"
3323
" checker failed with error code"
3324
" {}".format(
3325
client_name,
3326
client["last_checker_status"]))
3327
client["enabled"] = False
3328
else:
3329
client["expires"] = (
3330
datetime.datetime.utcnow()
3331
+ client["timeout"])
3332
logger.debug("Last checker succeeded,"
3333
" keeping {} enabled".format(
3334
client_name))
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
3335
2048
try:
3336
client["secret"] = pgp.decrypt(
3337
client["encrypted_secret"],
3338
client_settings[client_name]["secret"])
3339
except PGPError:
3340
# If decryption fails, we use secret from new settings
3341
logger.debug("Failed to decrypt {} old secret".format(
3342
client_name))
3343
client["secret"] = (client_settings[client_name]
3344
["secret"])
3345
3346
# Add/remove clients based on new changes made to config
3347
for client_name in (set(old_client_settings)
3348
- set(client_settings)):
3349
del clients_data[client_name]
3350
for client_name in (set(client_settings)
3351
- set(old_client_settings)):
3352
clients_data[client_name] = client_settings[client_name]
3353
3354
# Create all client objects
3355
for client_name, client in clients_data.items():
3356
tcp_server.clients[client_name] = client_class(
3357
name=client_name,
3358
settings=client,
3359
server_settings=server_settings)
3360
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
3361
2058
if not tcp_server.clients:
3362
2059
logger.warning("No clients defined")
3363
3364
if not foreground:
3365
if pidfile is not None:
3366
pid = os.getpid()
3367
try:
3368
with pidfile:
3369
print(pid, file=pidfile)
3370
except IOError:
3371
logger.error("Could not write to file %r with PID %d",
3372
pidfilename, pid)
3373
del pidfile
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
3374
2073
del pidfilename
3375
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
3379
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
3380
2080
if use_dbus:
3381
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2081
class MandosDBusService(dbus.service.Object):
3385
2082
"""A D-Bus proxy object"""
3386
3387
2083
def __init__(self):
3388
2084
dbus.service.Object.__init__(self, bus, "/")
3389
3390
2085
_interface = "se.recompile.Mandos"
3391
2086
3392
2087
@dbus.service.signal(_interface, signature="o")
3393
2088
def ClientAdded(self, objpath):
3394
2089
"D-Bus signal"
3395
2090
pass
3396
2091
3397
2092
@dbus.service.signal(_interface, signature="ss")
3398
def ClientNotFound(self, key_id, address):
2093
def ClientNotFound(self, fingerprint, address):
3399
2094
"D-Bus signal"
3400
2095
pass
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2096
3404
2097
@dbus.service.signal(_interface, signature="os")
3405
2098
def ClientRemoved(self, objpath, name):
3406
2099
"D-Bus signal"
3407
2100
pass
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
2101
3411
2102
@dbus.service.method(_interface, out_signature="ao")
3412
2103
def GetAllClients(self):
3413
2104
"D-Bus method"
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3416
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3418
"true"})
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2107
3419
2108
@dbus.service.method(_interface,
3420
2109
out_signature="a{oa{sv}}")
3421
2110
def GetAllClientsWithProperties(self):
3422
2111
"D-Bus method"
3423
2112
return dbus.Dictionary(
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
3427
2115
signature="oa{sv}")
3428
2116
3429
2117
@dbus.service.method(_interface, in_signature="o")
3430
2118
def RemoveClient(self, object_path):
3431
2119
"D-Bus method"
3432
for c in tcp_server.clients.values():
2120
for c in tcp_server.clients:
3433
2121
if c.dbus_object_path == object_path:
3434
del tcp_server.clients[c.name]
2122
tcp_server.clients.remove(c)
3435
2123
c.remove_from_connection()
3436
# Don't signal the disabling
2124
# Don't signal anything except ClientRemoved
3437
2125
c.disable(quiet=True)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2126
# Emit D-Bus signal
2127
self.ClientRemoved(object_path, c.name)
3440
2128
return
3441
2129
raise KeyError(object_path)
3442
2130
3443
2131
del _interface
3444
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3448
"""D-Bus method"""
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3451
dbus.Dictionary(
3452
{interface: client.GetAll(interface)
3453
for interface in
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3456
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3459
if use_dbus:
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3463
dbus.Dictionary(
3464
{interface: client.GetAll(interface)
3465
for interface in
3466
client._get_all_interface_names()}))
3467
# Old signal
3468
self.ClientAdded(client.dbus_object_path)
3469
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3472
if use_dbus:
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3477
# Old signal
3478
self.ClientRemoved(client.dbus_object_path,
3479
client.name)
3480
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
2132
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2136
3488
2137
def cleanup():
3489
2138
"Cleanup function; run on exit"
3490
if zeroconf:
3491
service.cleanup()
3492
3493
mp.active_children()
3494
wn.close()
3495
if not (tcp_server.clients or client_settings):
3496
return
3497
3498
# Store client before exiting. Secrets are encrypted with key
3499
# based on what config file has. If config file is
3500
# removed/edited, old secret will thus be unrecovable.
3501
clients = {}
3502
with PGPEngine() as pgp:
3503
for client in tcp_server.clients.values():
3504
key = client_settings[client.name]["secret"]
3505
client.encrypted_secret = pgp.encrypt(client.secret,
3506
key)
3507
client_dict = {}
3508
3509
# A list of attributes that can not be pickled
3510
# + secret.
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
3514
.Object):
3515
exclude.add(name)
3516
3517
client_dict["encrypted_secret"] = (client
3518
.encrypted_secret)
3519
for attr in client.client_structure:
3520
if attr not in exclude:
3521
client_dict[attr] = getattr(client, attr)
3522
3523
clients[client.name] = client_dict
3524
del client_settings[client.name]["secret"]
3525
3526
try:
3527
with tempfile.NamedTemporaryFile(
3528
mode='wb',
3529
suffix=".pickle",
3530
prefix='clients-',
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3534
protocol=2)
3535
tempname = stored_state.name
3536
os.rename(tempname, stored_state_path)
3537
except (IOError, OSError) as e:
3538
if not debug:
3539
try:
3540
os.remove(tempname)
3541
except NameError:
3542
pass
3543
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3544
logger.warning("Could not save persistent state: {}"
3545
.format(os.strerror(e.errno)))
3546
else:
3547
logger.warning("Could not save persistent state:",
3548
exc_info=e)
3549
raise
3550
3551
# Delete all clients, and settings from config
2139
service.cleanup()
2140
2141
multiprocessing.active_children()
3552
2142
while tcp_server.clients:
3553
name, client = tcp_server.clients.popitem()
2143
client = tcp_server.clients.pop()
3554
2144
if use_dbus:
3555
2145
client.remove_from_connection()
3556
# Don't signal the disabling
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
3557
2148
client.disable(quiet=True)
3558
# Emit D-Bus signal for removal
3559
2149
if use_dbus:
3560
mandos_dbus_service.client_removed_signal(client)
3561
client_settings.clear()
3562
2150
# Emit D-Bus signal
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2154
3563
2155
atexit.register(cleanup)
3564
3565
for client in tcp_server.clients.values():
2156
2157
for client in tcp_server.clients:
3566
2158
if use_dbus:
3567
# Emit D-Bus signal for adding
3568
mandos_dbus_service.client_added_signal(client)
3569
# Need to initiate checking of clients
3570
if client.enabled:
3571
client.init_checker()
3572
2159
# Emit D-Bus signal
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2162
3573
2163
tcp_server.enable()
3574
2164
tcp_server.server_activate()
3575
2165
3576
2166
# Find out what port we got
3577
if zeroconf:
3578
service.port = tcp_server.socket.getsockname()[1]
2167
service.port = tcp_server.socket.getsockname()[1]
3579
2168
if use_ipv6:
3580
2169
logger.info("Now listening on address %r, port %d,"
3581
" flowinfo %d, scope_id %d",
3582
*tcp_server.socket.getsockname())
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
3583
2172
else: # IPv4
3584
logger.info("Now listening on address %r, port %d",
3585
*tcp_server.socket.getsockname())
3586
3587
# service.interface = tcp_server.socket.getsockname()[3]
3588
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2175
2176
#service.interface = tcp_server.socket.getsockname()[3]
2177
3589
2178
try:
3590
if zeroconf:
3591
# From the Avahi example code
3592
try:
3593
service.activate()
3594
except dbus.exceptions.DBusException as error:
3595
logger.critical("D-Bus Exception", exc_info=error)
3596
cleanup()
3597
sys.exit(1)
3598
# End of Avahi example code
3599
3600
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3601
lambda *args, **kwargs:
3602
(tcp_server.handle_request
3603
(*args[2:], **kwargs) or True))
3604
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2187
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
lambda *args, **kwargs:
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
2192
3605
2193
logger.debug("Starting main loop")
3606
2194
main_loop.run()
3607
2195
except AvahiError as error:
3608
logger.critical("Avahi Error", exc_info=error)
2196
logger.critical("AvahiError: %s", error)
3609
2197
cleanup()
3610
2198
sys.exit(1)
3611
2199
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0