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- Committer: Björn Påhlsson
- Date: 2011-11-11 14:14:24 UTC
- mto: (518.2.5 persistent-state-gpgme)
- mto: This revision was merged to the branch mainline in revision 524.
- Revision ID: belorn@fukt.bsnet.se-20111111141424-405blpt3kwrla6lw
new signal: NewRequest(IP_address)
Sent when a client ask for its password
Sent when a client ask for its password
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python3 -bI
2
# -*- coding: utf-8; lexical-binding: t -*-
3
#
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
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 © 2008-2022 Teddy Hogeborn
15
# Copyright © 2008-2022 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
#
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
import sys
43
import unittest
37
import SocketServer as socketserver
38
import socket
44
39
import argparse
45
import logging
46
import os
47
try:
48
import SocketServer as socketserver
49
except ImportError:
50
import socketserver
51
import socket
52
40
import datetime
53
41
import errno
54
try:
55
import ConfigParser as configparser
56
except ImportError:
57
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
49
import sys
58
50
import re
51
import os
59
52
import signal
60
53
import subprocess
61
54
import atexit
62
55
import stat
56
import logging
63
57
import logging.handlers
64
58
import pwd
65
59
import contextlib
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
import random
81
import shlex
66
import hashlib
82
67
83
68
import dbus
84
69
import dbus.service
85
import gi
86
from gi.repository import GLib
70
import gobject
71
import avahi
87
72
from dbus.mainloop.glib import DBusGMainLoop
88
73
import ctypes
89
74
import ctypes.util
90
75
import xml.dom.minidom
91
76
import inspect
92
93
if sys.version_info.major == 2:
94
__metaclass__ = type
95
str = unicode
96
input = raw_input
97
98
# Add collections.abc.Callable if it does not exist
99
try:
100
collections.abc.Callable
101
except AttributeError:
102
class abc:
103
Callable = collections.Callable
104
collections.abc = abc
105
del abc
106
107
# Add shlex.quote if it does not exist
108
try:
109
shlex.quote
110
except AttributeError:
111
shlex.quote = re.escape
112
113
# Show warnings by default
114
if not sys.warnoptions:
115
import warnings
116
warnings.simplefilter("default")
117
118
# Try to find the value of SO_BINDTODEVICE:
119
try:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
77
import Crypto.Cipher.AES
78
79
try:
122
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
81
except AttributeError:
124
82
try:
125
# This is where SO_BINDTODEVICE was up to and including Python
126
# 2.6, and also 3.2:
127
83
from IN import SO_BINDTODEVICE
128
84
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
131
try:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
133
"/dev/stdin"],
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
140
# No value found
141
SO_BINDTODEVICE = None
142
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
145
146
version = "1.8.17"
147
stored_state_file = "clients.pickle"
148
149
log = logging.getLogger(os.path.basename(sys.argv[0]))
150
logging.captureWarnings(True) # Show warnings via the logging system
151
syslogger = None
152
153
try:
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
156
except (OSError, AttributeError):
157
158
def if_nametoindex(interface):
159
"Get an interface index the hard way, i.e. using fcntl()"
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
with contextlib.closing(socket.socket()) as s:
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
165
return interface_index
166
167
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
172
func.func_globals,
173
func.func_name,
174
func.func_defaults,
175
func.func_closure)
176
else:
177
return types.FunctionType(func.__code__,
178
func.__globals__,
179
func.__name__,
180
func.__defaults__,
181
func.__closure__)
182
183
184
def initlogger(debug, level=logging.WARNING):
185
"""init logger and add loglevel"""
186
187
global syslogger
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
190
address="/dev/log"))
191
syslogger.setFormatter(logging.Formatter
192
("Mandos [%(process)d]: %(levelname)s:"
193
" %(message)s"))
194
log.addHandler(syslogger)
195
196
if debug:
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter("%(asctime)s %(name)s"
199
" [%(process)d]:"
200
" %(levelname)s:"
201
" %(message)s"))
202
log.addHandler(console)
203
log.setLevel(level)
204
205
206
class PGPError(Exception):
207
"""Exception if encryption/decryption fails"""
208
pass
209
210
211
class PGPEngine:
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
213
214
def __init__(self):
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
216
self.gpg = "gpg"
217
try:
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
221
if name == b"gpg":
222
self.gpg = path
223
break
224
except OSError as e:
225
if e.errno != errno.ENOENT:
226
raise
227
self.gnupgargs = ["--batch",
228
"--homedir", self.tempdir,
229
"--force-mdc",
230
"--quiet"]
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
234
235
def __enter__(self):
236
return self
237
238
def __exit__(self, exc_type, exc_value, traceback):
239
self._cleanup()
240
return False
241
242
def __del__(self):
243
self._cleanup()
244
245
def _cleanup(self):
246
if self.tempdir is not None:
247
# Delete contents of tempdir
248
for root, dirs, files in os.walk(self.tempdir,
249
topdown=False):
250
for filename in files:
251
os.remove(os.path.join(root, filename))
252
for dirname in dirs:
253
os.rmdir(os.path.join(root, dirname))
254
# Remove tempdir
255
os.rmdir(self.tempdir)
256
self.tempdir = None
257
258
def password_encode(self, password):
259
# Passphrase can not be empty and can not contain newlines or
260
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
267
return encoded
268
269
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
274
passfile.flush()
275
proc = subprocess.Popen([self.gpg, "--symmetric",
276
"--passphrase-file",
277
passfile.name]
278
+ self.gnupgargs,
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
284
raise PGPError(err)
285
return ciphertext
286
287
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
292
passfile.flush()
293
proc = subprocess.Popen([self.gpg, "--decrypt",
294
"--passphrase-file",
295
passfile.name]
296
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
302
raise PGPError(err)
303
return decrypted_plaintext
304
305
306
# Pretend that we have an Avahi module
307
class avahi:
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
317
318
@staticmethod
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
85
SO_BINDTODEVICE = None
86
87
88
version = "1.4.1"
89
90
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
98
' %(message)s'))
99
logger.addHandler(syslogger)
100
101
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
106
logger.addHandler(console)
330
107
331
108
332
109
class AvahiError(Exception):
333
110
def __init__(self, value, *args, **kwargs):
334
111
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
336
**kwargs)
337
112
super(AvahiError, self).__init__(value, *args, **kwargs)
113
def __unicode__(self):
114
return unicode(repr(self.value))
338
115
339
116
class AvahiServiceError(AvahiError):
340
117
pass
341
118
342
343
119
class AvahiGroupError(AvahiError):
344
120
pass
345
121
346
122
347
class AvahiService:
123
class AvahiService(object):
348
124
"""An Avahi (Zeroconf) service.
349
125
350
126
Attributes:
351
127
interface: integer; avahi.IF_UNSPEC or an interface index.
352
128
Used to optionally bind to the specified interface.
353
name: string; Example: "Mandos"
354
type: string; Example: "_mandos._tcp".
355
See <https://www.iana.org/assignments/service-names-port-numbers>
129
name: string; Example: 'Mandos'
130
type: string; Example: '_mandos._tcp'.
131
See <http://www.dns-sd.org/ServiceTypes.html>
356
132
port: integer; what port to announce
357
133
TXT: list of strings; TXT record for the service
358
134
domain: string; Domain to publish on, default to .local if empty.
364
140
server: D-Bus Server
365
141
bus: dbus.SystemBus()
366
142
"""
367
368
def __init__(self,
369
interface=avahi.IF_UNSPEC,
370
name=None,
371
servicetype=None,
372
port=None,
373
TXT=None,
374
domain="",
375
host="",
376
max_renames=32768,
377
protocol=avahi.PROTO_UNSPEC,
378
bus=None):
143
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
servicetype = None, port = None, TXT = None,
145
domain = "", host = "", max_renames = 32768,
146
protocol = avahi.PROTO_UNSPEC, bus = None):
379
147
self.interface = interface
380
148
self.name = name
381
149
self.type = servicetype
390
158
self.server = None
391
159
self.bus = bus
392
160
self.entry_group_state_changed_match = None
393
394
def rename(self, remove=True):
161
def rename(self):
395
162
"""Derived from the Avahi example code"""
396
163
if self.rename_count >= self.max_renames:
397
log.critical("No suitable Zeroconf service name found"
398
" after %i retries, exiting.",
399
self.rename_count)
164
logger.critical("No suitable Zeroconf service name found"
165
" after %i retries, exiting.",
166
self.rename_count)
400
167
raise AvahiServiceError("Too many renames")
401
self.name = str(
402
self.server.GetAlternativeServiceName(self.name))
168
self.name = unicode(self.server
169
.GetAlternativeServiceName(self.name))
170
logger.info("Changing Zeroconf service name to %r ...",
171
self.name)
172
self.remove()
173
try:
174
self.add()
175
except dbus.exceptions.DBusException as error:
176
logger.critical("DBusException: %s", error)
177
self.cleanup()
178
os._exit(1)
403
179
self.rename_count += 1
404
log.info("Changing Zeroconf service name to %r ...",
405
self.name)
406
if remove:
407
self.remove()
408
try:
409
self.add()
410
except dbus.exceptions.DBusException as error:
411
if (error.get_dbus_name()
412
== "org.freedesktop.Avahi.CollisionError"):
413
log.info("Local Zeroconf service name collision.")
414
return self.rename(remove=False)
415
else:
416
log.critical("D-Bus Exception", exc_info=error)
417
self.cleanup()
418
os._exit(1)
419
420
180
def remove(self):
421
181
"""Derived from the Avahi example code"""
422
182
if self.entry_group_state_changed_match is not None:
424
184
self.entry_group_state_changed_match = None
425
185
if self.group is not None:
426
186
self.group.Reset()
427
428
187
def add(self):
429
188
"""Derived from the Avahi example code"""
430
189
self.remove()
435
194
avahi.DBUS_INTERFACE_ENTRY_GROUP)
436
195
self.entry_group_state_changed_match = (
437
196
self.group.connect_to_signal(
438
"StateChanged", self.entry_group_state_changed))
439
log.debug("Adding Zeroconf service '%s' of type '%s' ...",
440
self.name, self.type)
197
'StateChanged', self.entry_group_state_changed))
198
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
199
self.name, self.type)
441
200
self.group.AddService(
442
201
self.interface,
443
202
self.protocol,
447
206
dbus.UInt16(self.port),
448
207
avahi.string_array_to_txt_array(self.TXT))
449
208
self.group.Commit()
450
451
209
def entry_group_state_changed(self, state, error):
452
210
"""Derived from the Avahi example code"""
453
log.debug("Avahi entry group state change: %i", state)
454
211
logger.debug("Avahi entry group state change: %i", state)
212
455
213
if state == avahi.ENTRY_GROUP_ESTABLISHED:
456
log.debug("Zeroconf service established.")
214
logger.debug("Zeroconf service established.")
457
215
elif state == avahi.ENTRY_GROUP_COLLISION:
458
log.info("Zeroconf service name collision.")
216
logger.info("Zeroconf service name collision.")
459
217
self.rename()
460
218
elif state == avahi.ENTRY_GROUP_FAILURE:
461
log.critical("Avahi: Error in group state changed %s",
462
str(error))
463
raise AvahiGroupError("State changed: {!s}".format(error))
464
219
logger.critical("Avahi: Error in group state changed %s",
220
unicode(error))
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
465
223
def cleanup(self):
466
224
"""Derived from the Avahi example code"""
467
225
if self.group is not None:
468
226
try:
469
227
self.group.Free()
470
228
except (dbus.exceptions.UnknownMethodException,
471
dbus.exceptions.DBusException):
229
dbus.exceptions.DBusException) as e:
472
230
pass
473
231
self.group = None
474
232
self.remove()
475
476
233
def server_state_changed(self, state, error=None):
477
234
"""Derived from the Avahi example code"""
478
log.debug("Avahi server state change: %i", state)
479
bad_states = {
480
avahi.SERVER_INVALID: "Zeroconf server invalid",
481
avahi.SERVER_REGISTERING: None,
482
avahi.SERVER_COLLISION: "Zeroconf server name collision",
483
avahi.SERVER_FAILURE: "Zeroconf server failure",
484
}
235
logger.debug("Avahi server state change: %i", state)
236
bad_states = { avahi.SERVER_INVALID:
237
"Zeroconf server invalid",
238
avahi.SERVER_REGISTERING: None,
239
avahi.SERVER_COLLISION:
240
"Zeroconf server name collision",
241
avahi.SERVER_FAILURE:
242
"Zeroconf server failure" }
485
243
if state in bad_states:
486
244
if bad_states[state] is not None:
487
245
if error is None:
488
log.error(bad_states[state])
246
logger.error(bad_states[state])
489
247
else:
490
log.error(bad_states[state] + ": %r", error)
248
logger.error(bad_states[state] + ": %r", error)
491
249
self.cleanup()
492
250
elif state == avahi.SERVER_RUNNING:
493
try:
494
self.add()
495
except dbus.exceptions.DBusException as error:
496
if (error.get_dbus_name()
497
== "org.freedesktop.Avahi.CollisionError"):
498
log.info("Local Zeroconf service name collision.")
499
return self.rename(remove=False)
500
else:
501
log.critical("D-Bus Exception", exc_info=error)
502
self.cleanup()
503
os._exit(1)
251
self.add()
504
252
else:
505
253
if error is None:
506
log.debug("Unknown state: %r", state)
254
logger.debug("Unknown state: %r", state)
507
255
else:
508
log.debug("Unknown state: %r: %r", state, error)
509
256
logger.debug("Unknown state: %r: %r", state, error)
510
257
def activate(self):
511
258
"""Derived from the Avahi example code"""
512
259
if self.server is None:
516
263
follow_name_owner_changes=True),
517
264
avahi.DBUS_INTERFACE_SERVER)
518
265
self.server.connect_to_signal("StateChanged",
519
self.server_state_changed)
266
self.server_state_changed)
520
267
self.server_state_changed(self.server.GetState())
521
268
522
523
269
class AvahiServiceToSyslog(AvahiService):
524
def rename(self, *args, **kwargs):
270
def rename(self):
525
271
"""Add the new name to the syslog messages"""
526
ret = super(AvahiServiceToSyslog, self).rename(*args,
527
**kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
"Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"
530
.format(self.name)))
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
531
277
return ret
532
278
533
534
# Pretend that we have a GnuTLS module
535
class gnutls:
536
"""This isn't so much a class as it is a module-like namespace."""
537
538
library = ctypes.util.find_library("gnutls")
539
if library is None:
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
542
del library
543
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
546
547
# Constants
548
E_SUCCESS = 0
549
E_INTERRUPTED = -52
550
E_AGAIN = -28
551
CRT_OPENPGP = 2
552
CRT_RAWPK = 3
553
CLIENT = 2
554
SHUT_RDWR = 0
555
CRD_CERTIFICATE = 1
556
E_NO_CERTIFICATE_FOUND = -49
557
X509_FMT_DER = 0
558
NO_TICKETS = 1<<10
559
ENABLE_RAWPK = 1<<18
560
CTYPE_PEERS = 3
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
563
564
# Types
565
class _session_int(ctypes.Structure):
566
_fields_ = []
567
session_t = ctypes.POINTER(_session_int)
568
569
class certificate_credentials_st(ctypes.Structure):
570
_fields_ = []
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
574
575
class datum_t(ctypes.Structure):
576
_fields_ = [("data", ctypes.POINTER(ctypes.c_ubyte)),
577
("size", ctypes.c_uint)]
578
579
class _openpgp_crt_int(ctypes.Structure):
580
_fields_ = []
581
openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
587
588
# Exceptions
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
593
# gnutls.strerror()
594
self.code = code
595
if message is None and code is not None:
596
message = gnutls.strerror(code).decode(
597
"utf-8", errors="replace")
598
return super(gnutls.Error, self).__init__(
599
message, *args)
600
601
class CertificateSecurityError(Error):
602
pass
603
604
class PointerTo:
605
def __init__(self, cls):
606
self.cls = cls
607
608
def from_param(self, obj):
609
if not isinstance(obj, self.cls):
610
raise TypeError("Not of type {}: {!r}"
611
.format(self.cls.__name__, obj))
612
return ctypes.byref(obj.from_param(obj))
613
614
class CastToVoidPointer:
615
def __init__(self, cls):
616
self.cls = cls
617
618
def from_param(self, obj):
619
if not isinstance(obj, self.cls):
620
raise TypeError("Not of type {}: {!r}"
621
.format(self.cls.__name__, obj))
622
return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)
623
624
class With_from_param:
625
@classmethod
626
def from_param(cls, obj):
627
return obj._as_parameter_
628
629
# Classes
630
class Credentials(With_from_param):
631
def __init__(self):
632
self._as_parameter_ = gnutls.certificate_credentials_t()
633
gnutls.certificate_allocate_credentials(self)
634
self.type = gnutls.CRD_CERTIFICATE
635
636
def __del__(self):
637
gnutls.certificate_free_credentials(self)
638
639
class ClientSession(With_from_param):
640
def __init__(self, socket, credentials=None):
641
self._as_parameter_ = gnutls.session_t()
642
gnutls_flags = gnutls.CLIENT
643
if gnutls.check_version(b"3.5.6"):
644
gnutls_flags |= gnutls.NO_TICKETS
645
if gnutls.has_rawpk:
646
gnutls_flags |= gnutls.ENABLE_RAWPK
647
gnutls.init(self, gnutls_flags)
648
del gnutls_flags
649
gnutls.set_default_priority(self)
650
gnutls.transport_set_ptr(self, socket.fileno())
651
gnutls.handshake_set_private_extensions(self, True)
652
self.socket = socket
653
if credentials is None:
654
credentials = gnutls.Credentials()
655
gnutls.credentials_set(self, credentials.type,
656
credentials)
657
self.credentials = credentials
658
659
def __del__(self):
660
gnutls.deinit(self)
661
662
def handshake(self):
663
return gnutls.handshake(self)
664
665
def send(self, data):
666
data = bytes(data)
667
data_len = len(data)
668
while data_len > 0:
669
data_len -= gnutls.record_send(self, data[-data_len:],
670
data_len)
671
672
def bye(self):
673
return gnutls.bye(self, gnutls.SHUT_RDWR)
674
675
# Error handling functions
676
def _error_code(result):
677
"""A function to raise exceptions on errors, suitable
678
for the "restype" attribute on ctypes functions"""
679
if result >= gnutls.E_SUCCESS:
680
return result
681
if result == gnutls.E_NO_CERTIFICATE_FOUND:
682
raise gnutls.CertificateSecurityError(code=result)
683
raise gnutls.Error(code=result)
684
685
def _retry_on_error(result, func, arguments,
686
_error_code=_error_code):
687
"""A function to retry on some errors, suitable
688
for the "errcheck" attribute on ctypes functions"""
689
while result < gnutls.E_SUCCESS:
690
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
691
return _error_code(result)
692
result = func(*arguments)
693
return result
694
695
# Unless otherwise indicated, the function declarations below are
696
# all from the gnutls/gnutls.h C header file.
697
698
# Functions
699
priority_set_direct = _library.gnutls_priority_set_direct
700
priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,
701
ctypes.POINTER(ctypes.c_char_p)]
702
priority_set_direct.restype = _error_code
703
704
init = _library.gnutls_init
705
init.argtypes = [PointerTo(ClientSession), ctypes.c_int]
706
init.restype = _error_code
707
708
set_default_priority = _library.gnutls_set_default_priority
709
set_default_priority.argtypes = [ClientSession]
710
set_default_priority.restype = _error_code
711
712
record_send = _library.gnutls_record_send
713
record_send.argtypes = [ClientSession, ctypes.c_void_p,
714
ctypes.c_size_t]
715
record_send.restype = ctypes.c_ssize_t
716
record_send.errcheck = _retry_on_error
717
718
certificate_allocate_credentials = (
719
_library.gnutls_certificate_allocate_credentials)
720
certificate_allocate_credentials.argtypes = [
721
PointerTo(Credentials)]
722
certificate_allocate_credentials.restype = _error_code
723
724
certificate_free_credentials = (
725
_library.gnutls_certificate_free_credentials)
726
certificate_free_credentials.argtypes = [Credentials]
727
certificate_free_credentials.restype = None
728
729
handshake_set_private_extensions = (
730
_library.gnutls_handshake_set_private_extensions)
731
handshake_set_private_extensions.argtypes = [ClientSession,
732
ctypes.c_int]
733
handshake_set_private_extensions.restype = None
734
735
credentials_set = _library.gnutls_credentials_set
736
credentials_set.argtypes = [ClientSession, credentials_type_t,
737
CastToVoidPointer(Credentials)]
738
credentials_set.restype = _error_code
739
740
strerror = _library.gnutls_strerror
741
strerror.argtypes = [ctypes.c_int]
742
strerror.restype = ctypes.c_char_p
743
744
certificate_type_get = _library.gnutls_certificate_type_get
745
certificate_type_get.argtypes = [ClientSession]
746
certificate_type_get.restype = _error_code
747
748
certificate_get_peers = _library.gnutls_certificate_get_peers
749
certificate_get_peers.argtypes = [ClientSession,
750
ctypes.POINTER(ctypes.c_uint)]
751
certificate_get_peers.restype = ctypes.POINTER(datum_t)
752
753
global_set_log_level = _library.gnutls_global_set_log_level
754
global_set_log_level.argtypes = [ctypes.c_int]
755
global_set_log_level.restype = None
756
757
global_set_log_function = _library.gnutls_global_set_log_function
758
global_set_log_function.argtypes = [log_func]
759
global_set_log_function.restype = None
760
761
deinit = _library.gnutls_deinit
762
deinit.argtypes = [ClientSession]
763
deinit.restype = None
764
765
handshake = _library.gnutls_handshake
766
handshake.argtypes = [ClientSession]
767
handshake.restype = ctypes.c_int
768
handshake.errcheck = _retry_on_error
769
770
transport_set_ptr = _library.gnutls_transport_set_ptr
771
transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]
772
transport_set_ptr.restype = None
773
774
bye = _library.gnutls_bye
775
bye.argtypes = [ClientSession, close_request_t]
776
bye.restype = ctypes.c_int
777
bye.errcheck = _retry_on_error
778
779
check_version = _library.gnutls_check_version
780
check_version.argtypes = [ctypes.c_char_p]
781
check_version.restype = ctypes.c_char_p
782
783
_need_version = b"3.3.0"
784
if check_version(_need_version) is None:
785
raise self.Error("Needs GnuTLS {} or later"
786
.format(_need_version))
787
788
_tls_rawpk_version = b"3.6.6"
789
has_rawpk = bool(check_version(_tls_rawpk_version))
790
791
if has_rawpk:
792
# Types
793
class pubkey_st(ctypes.Structure):
794
_fields = []
795
pubkey_t = ctypes.POINTER(pubkey_st)
796
797
x509_crt_fmt_t = ctypes.c_int
798
799
# All the function declarations below are from
800
# gnutls/abstract.h
801
pubkey_init = _library.gnutls_pubkey_init
802
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
803
pubkey_init.restype = _error_code
804
805
pubkey_import = _library.gnutls_pubkey_import
806
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
807
x509_crt_fmt_t]
808
pubkey_import.restype = _error_code
809
810
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
811
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
812
ctypes.POINTER(ctypes.c_ubyte),
813
ctypes.POINTER(ctypes.c_size_t)]
814
pubkey_get_key_id.restype = _error_code
815
816
pubkey_deinit = _library.gnutls_pubkey_deinit
817
pubkey_deinit.argtypes = [pubkey_t]
818
pubkey_deinit.restype = None
819
else:
820
# All the function declarations below are from
821
# gnutls/openpgp.h
822
823
openpgp_crt_init = _library.gnutls_openpgp_crt_init
824
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
825
openpgp_crt_init.restype = _error_code
826
827
openpgp_crt_import = _library.gnutls_openpgp_crt_import
828
openpgp_crt_import.argtypes = [openpgp_crt_t,
829
ctypes.POINTER(datum_t),
830
openpgp_crt_fmt_t]
831
openpgp_crt_import.restype = _error_code
832
833
openpgp_crt_verify_self = \
834
_library.gnutls_openpgp_crt_verify_self
835
openpgp_crt_verify_self.argtypes = [
836
openpgp_crt_t,
837
ctypes.c_uint,
838
ctypes.POINTER(ctypes.c_uint),
839
]
840
openpgp_crt_verify_self.restype = _error_code
841
842
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
843
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
844
openpgp_crt_deinit.restype = None
845
846
openpgp_crt_get_fingerprint = (
847
_library.gnutls_openpgp_crt_get_fingerprint)
848
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
849
ctypes.c_void_p,
850
ctypes.POINTER(
851
ctypes.c_size_t)]
852
openpgp_crt_get_fingerprint.restype = _error_code
853
854
if check_version(b"3.6.4"):
855
certificate_type_get2 = _library.gnutls_certificate_type_get2
856
certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]
857
certificate_type_get2.restype = _error_code
858
859
# Remove non-public functions
860
del _error_code, _retry_on_error
861
862
863
def call_pipe(connection, # : multiprocessing.Connection
864
func, *args, **kwargs):
865
"""This function is meant to be called by multiprocessing.Process
866
867
This function runs func(*args, **kwargs), and writes the resulting
868
return value on the provided multiprocessing.Connection.
869
"""
870
connection.send(func(*args, **kwargs))
871
connection.close()
872
873
874
class Client:
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
284
285
class Client(object):
875
286
"""A representation of a client host served by this server.
876
287
877
288
Attributes:
878
approved: bool(); None if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
879
290
approval_delay: datetime.timedelta(); Time to wait for approval
880
291
approval_duration: datetime.timedelta(); Duration of one approval
881
checker: multiprocessing.Process(); a running checker process used
882
to see if the client lives. None if no process is
883
running.
884
checker_callback_tag: a GLib event source tag, or None
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
885
296
checker_command: string; External command which is run to check
886
297
if client lives. %() expansions are done at
887
298
runtime with vars(self) as dict, so that for
888
299
instance %(name)s can be used in the command.
889
checker_initiator_tag: a GLib event source tag, or None
300
checker_initiator_tag: a gobject event source tag, or None
890
301
created: datetime.datetime(); (UTC) object creation
891
302
client_structure: Object describing what attributes a client has
892
303
and is used for storing the client at exit
893
304
current_checker_command: string; current running checker_command
894
disable_initiator_tag: a GLib event source tag, or None
305
disable_initiator_tag: a gobject event source tag, or None
895
306
enabled: bool()
896
307
fingerprint: string (40 or 32 hexadecimal digits); used to
897
uniquely identify an OpenPGP client
898
key_id: string (64 hexadecimal digits); used to uniquely identify
899
a client using raw public keys
308
uniquely identify the client
900
309
host: string; available for use by the checker command
901
310
interval: datetime.timedelta(); How often to start a new checker
902
311
last_approval_request: datetime.datetime(); (UTC) or None
903
312
last_checked_ok: datetime.datetime(); (UTC) or None
904
last_checker_status: integer between 0 and 255 reflecting exit
905
status of last checker. -1 reflects crashed
906
checker, -2 means no checker completed yet.
907
last_checker_signal: The signal which killed the last checker, if
908
last_checker_status is -1
909
last_enabled: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit status
314
of last checker. -1 reflect crashed checker,
315
or None.
316
last_enabled: datetime.datetime(); (UTC)
910
317
name: string; from the config file, used in log messages and
911
318
D-Bus identifiers
912
319
secret: bytestring; sent verbatim (over TLS) to client
913
320
timeout: datetime.timedelta(); How long from last_checked_ok
914
321
until this client is disabled
915
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
916
323
runtime_expansions: Allowed attributes for runtime expansion.
917
324
expires: datetime.datetime(); time (UTC) when a client will be
918
325
disabled, or None
919
server_settings: The server_settings dict from main()
920
326
"""
921
327
922
328
runtime_expansions = ("approval_delay", "approval_duration",
923
"created", "enabled", "expires", "key_id",
924
"fingerprint", "host", "interval",
925
"last_approval_request", "last_checked_ok",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
926
331
"last_enabled", "name", "timeout")
927
client_defaults = {
928
"timeout": "PT5M",
929
"extended_timeout": "PT15M",
930
"interval": "PT2M",
931
"checker": "fping -q -- %%(host)s",
932
"host": "",
933
"approval_delay": "PT0S",
934
"approval_duration": "PT1S",
935
"approved_by_default": "True",
936
"enabled": "True",
937
}
938
939
@staticmethod
940
def config_parser(config):
941
"""Construct a new dict of client settings of this form:
942
{ client_name: {setting_name: value, ...}, ...}
943
with exceptions for any special settings as defined above.
944
NOTE: Must be a pure function. Must return the same result
945
value given the same arguments.
946
"""
947
settings = {}
948
for client_name in config.sections():
949
section = dict(config.items(client_name))
950
client = settings[client_name] = {}
951
952
client["host"] = section["host"]
953
# Reformat values from string types to Python types
954
client["approved_by_default"] = config.getboolean(
955
client_name, "approved_by_default")
956
client["enabled"] = config.getboolean(client_name,
957
"enabled")
958
959
# Uppercase and remove spaces from key_id and fingerprint
960
# for later comparison purposes with return value from the
961
# key_id() and fingerprint() functions
962
client["key_id"] = (section.get("key_id", "").upper()
963
.replace(" ", ""))
964
client["fingerprint"] = (section.get("fingerprint",
965
"").upper()
966
.replace(" ", ""))
967
if not (client["key_id"] or client["fingerprint"]):
968
log.error("Skipping client %s without key_id or"
969
" fingerprint", client_name)
970
del settings[client_name]
971
continue
972
if "secret" in section:
973
client["secret"] = codecs.decode(section["secret"]
974
.encode("utf-8"),
975
"base64")
976
elif "secfile" in section:
977
with open(os.path.expanduser(os.path.expandvars
978
(section["secfile"])),
979
"rb") as secfile:
980
client["secret"] = secfile.read()
981
else:
982
raise TypeError("No secret or secfile for section {}"
983
.format(section))
984
client["timeout"] = string_to_delta(section["timeout"])
985
client["extended_timeout"] = string_to_delta(
986
section["extended_timeout"])
987
client["interval"] = string_to_delta(section["interval"])
988
client["approval_delay"] = string_to_delta(
989
section["approval_delay"])
990
client["approval_duration"] = string_to_delta(
991
section["approval_duration"])
992
client["checker_command"] = section["checker"]
993
client["last_approval_request"] = None
994
client["last_checked_ok"] = None
995
client["last_checker_status"] = -2
996
997
return settings
998
999
def __init__(self, settings, name=None, server_settings=None):
332
333
def timeout_milliseconds(self):
334
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
336
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
340
341
def interval_milliseconds(self):
342
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
344
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
347
348
def __init__(self, name = None, config=None):
349
"""Note: the 'checker' key in 'config' sets the
350
'checker_command' attribute and *not* the 'checker'
351
attribute."""
1000
352
self.name = name
1001
if server_settings is None:
1002
server_settings = {}
1003
self.server_settings = server_settings
1004
# adding all client settings
1005
for setting, value in settings.items():
1006
setattr(self, setting, value)
1007
1008
if self.enabled:
1009
if not hasattr(self, "last_enabled"):
1010
self.last_enabled = datetime.datetime.utcnow()
1011
if not hasattr(self, "expires"):
1012
self.expires = (datetime.datetime.utcnow()
1013
+ self.timeout)
353
if config is None:
354
config = {}
355
logger.debug("Creating client %r", self.name)
356
# Uppercase and remove spaces from fingerprint for later
357
# comparison purposes with return value from the fingerprint()
358
# function
359
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
361
logger.debug(" Fingerprint: %s", self.fingerprint)
362
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
364
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
367
"rb") as secfile:
368
self.secret = secfile.read()
1014
369
else:
1015
self.last_enabled = None
1016
self.expires = None
1017
1018
log.debug("Creating client %r", self.name)
1019
log.debug(" Key ID: %s", self.key_id)
1020
log.debug(" Fingerprint: %s", self.fingerprint)
1021
self.created = settings.get("created",
1022
datetime.datetime.utcnow())
1023
1024
# attributes specific for this server instance
370
raise TypeError("No secret or secfile for client %s"
371
% self.name)
372
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
377
self.last_checked_ok = None
378
self.last_checker_status = None
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
self.interval = string_to_delta(config["interval"])
1025
383
self.checker = None
1026
384
self.checker_initiator_tag = None
1027
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
1028
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
1029
389
self.current_checker_command = None
1030
self.approved = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
1031
393
self.approvals_pending = 0
1032
self.changedstate = multiprocessing_manager.Condition(
1033
multiprocessing_manager.Lock())
1034
self.client_structure = [attr
1035
for attr in self.__dict__.keys()
1036
if not attr.startswith("_")]
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
400
.Lock()))
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
1037
402
self.client_structure.append("client_structure")
1038
403
1039
for name, t in inspect.getmembers(
1040
type(self), lambda obj: isinstance(obj, property)):
404
405
for name, t in inspect.getmembers(type(self),
406
lambda obj: isinstance(obj, property)):
1041
407
if not name.startswith("_"):
1042
408
self.client_structure.append(name)
1043
409
1044
410
# Send notice to process children that client state has changed
1045
411
def send_changedstate(self):
1046
412
with self.changedstate:
1047
413
self.changedstate.notify_all()
1048
414
1049
415
def enable(self):
1050
416
"""Start this client's checker and timeout hooks"""
1051
417
if getattr(self, "enabled", False):
1052
418
# Already enabled
1053
419
return
420
self.send_changedstate()
421
self.expires = datetime.datetime.utcnow() + self.timeout
1054
422
self.enabled = True
1055
423
self.last_enabled = datetime.datetime.utcnow()
1056
424
self.init_checker()
1057
self.send_changedstate()
1058
425
1059
426
def disable(self, quiet=True):
1060
427
"""Disable this client."""
1061
428
if not getattr(self, "enabled", False):
1062
429
return False
1063
430
if not quiet:
1064
log.info("Disabling client %s", self.name)
1065
if getattr(self, "disable_initiator_tag", None) is not None:
1066
GLib.source_remove(self.disable_initiator_tag)
431
self.send_changedstate()
432
if not quiet:
433
logger.info("Disabling client %s", self.name)
434
if getattr(self, "disable_initiator_tag", False):
435
gobject.source_remove(self.disable_initiator_tag)
1067
436
self.disable_initiator_tag = None
1068
437
self.expires = None
1069
if getattr(self, "checker_initiator_tag", None) is not None:
1070
GLib.source_remove(self.checker_initiator_tag)
438
if getattr(self, "checker_initiator_tag", False):
439
gobject.source_remove(self.checker_initiator_tag)
1071
440
self.checker_initiator_tag = None
1072
441
self.stop_checker()
1073
442
self.enabled = False
1074
if not quiet:
1075
self.send_changedstate()
1076
# Do not run this again if called by a GLib.timeout_add
443
# Do not run this again if called by a gobject.timeout_add
1077
444
return False
1078
445
1079
446
def __del__(self):
1080
447
self.disable()
1081
448
1082
def init_checker(self, randomize_start=False):
1083
# Schedule a new checker to be started a randomly selected
1084
# time (a fraction of 'interval') from now. This spreads out
1085
# the startup of checkers over time when the server is
1086
# started.
1087
if self.checker_initiator_tag is not None:
1088
GLib.source_remove(self.checker_initiator_tag)
1089
interval_milliseconds = int(self.interval.total_seconds()
1090
* 1000)
1091
if randomize_start:
1092
delay_milliseconds = random.randrange(
1093
interval_milliseconds + 1)
1094
else:
1095
delay_milliseconds = interval_milliseconds
1096
self.checker_initiator_tag = GLib.timeout_add(
1097
delay_milliseconds, self.start_checker, randomize_start)
1098
delay = datetime.timedelta(0, 0, 0, delay_milliseconds)
1099
# A checker might take up to an 'interval' of time, so we can
1100
# expire at the soonest one interval after a checker was
1101
# started. Since the initial checker is delayed, the expire
1102
# time might have to be extended.
1103
now = datetime.datetime.utcnow()
1104
self.expires = now + delay + self.interval
1105
# Schedule a disable() at expire time
1106
if self.disable_initiator_tag is not None:
1107
GLib.source_remove(self.disable_initiator_tag)
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int((self.expires - now).total_seconds() * 1000),
1110
self.disable)
449
def init_checker(self):
450
# Schedule a new checker to be started an 'interval' from now,
451
# and every interval from then on.
452
self.checker_initiator_tag = (gobject.timeout_add
453
(self.interval_milliseconds(),
454
self.start_checker))
455
# Schedule a disable() when 'timeout' has passed
456
self.disable_initiator_tag = (gobject.timeout_add
457
(self.timeout_milliseconds(),
458
self.disable))
459
# Also start a new checker *right now*.
460
self.start_checker()
1111
461
1112
def checker_callback(self, source, condition, connection,
1113
command):
462
463
def checker_callback(self, pid, condition, command):
1114
464
"""The checker has completed, so take appropriate actions."""
1115
# Read return code from connection (see call_pipe)
1116
returncode = connection.recv()
1117
connection.close()
1118
if self.checker is not None:
1119
self.checker.join()
1120
465
self.checker_callback_tag = None
1121
466
self.checker = None
1122
1123
if returncode >= 0:
1124
self.last_checker_status = returncode
1125
self.last_checker_signal = None
467
if os.WIFEXITED(condition):
468
self.last_checker_status = os.WEXITSTATUS(condition)
1126
469
if self.last_checker_status == 0:
1127
log.info("Checker for %(name)s succeeded", vars(self))
470
logger.info("Checker for %(name)s succeeded",
471
vars(self))
1128
472
self.checked_ok()
1129
473
else:
1130
log.info("Checker for %(name)s failed", vars(self))
474
logger.info("Checker for %(name)s failed",
475
vars(self))
1131
476
else:
1132
477
self.last_checker_status = -1
1133
self.last_checker_signal = -returncode
1134
log.warning("Checker for %(name)s crashed?", vars(self))
1135
return False
1136
1137
def checked_ok(self):
1138
"""Assert that the client has been seen, alive and well."""
1139
self.last_checked_ok = datetime.datetime.utcnow()
1140
self.last_checker_status = 0
1141
self.last_checker_signal = None
1142
self.bump_timeout()
1143
1144
def bump_timeout(self, timeout=None):
1145
"""Bump up the timeout for this client."""
478
logger.warning("Checker for %(name)s crashed?",
479
vars(self))
480
481
def checked_ok(self, timeout=None):
482
"""Bump up the timeout for this client.
483
484
This should only be called when the client has been seen,
485
alive and well.
486
"""
1146
487
if timeout is None:
1147
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
1148
490
if self.disable_initiator_tag is not None:
1149
GLib.source_remove(self.disable_initiator_tag)
1150
self.disable_initiator_tag = None
491
gobject.source_remove(self.disable_initiator_tag)
1151
492
if getattr(self, "enabled", False):
1152
self.disable_initiator_tag = GLib.timeout_add(
1153
int(timeout.total_seconds() * 1000), self.disable)
493
self.disable_initiator_tag = (gobject.timeout_add
494
(_timedelta_to_milliseconds
495
(timeout), self.disable))
1154
496
self.expires = datetime.datetime.utcnow() + timeout
1155
497
1156
498
def need_approval(self):
1157
499
self.last_approval_request = datetime.datetime.utcnow()
1158
1159
def start_checker(self, start_was_randomized=False):
500
501
def start_checker(self):
1160
502
"""Start a new checker subprocess if one is not running.
1161
503
1162
504
If a checker already exists, leave it running and do
1163
505
nothing."""
1164
506
# The reason for not killing a running checker is that if we
1165
# did that, and if a checker (for some reason) started running
1166
# slowly and taking more than 'interval' time, then the client
1167
# would inevitably timeout, since no checker would get a
1168
# chance to run to completion. If we instead leave running
507
# did that, then if a checker (for some reason) started
508
# running slowly and taking more than 'interval' time, the
509
# client would inevitably timeout, since no checker would get
510
# a chance to run to completion. If we instead leave running
1169
511
# checkers alone, the checker would have to take more time
1170
512
# than 'timeout' for the client to be disabled, which is as it
1171
513
# should be.
1172
1173
if self.checker is not None and not self.checker.is_alive():
1174
log.warning("Checker was not alive; joining")
1175
self.checker.join()
1176
self.checker = None
514
515
# If a checker exists, make sure it is not a zombie
516
try:
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
522
else:
523
if pid:
524
logger.warning("Checker was a zombie")
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status,
527
self.current_checker_command)
1177
528
# Start a new checker if needed
1178
529
if self.checker is None:
1179
# Escape attributes for the shell
1180
escaped_attrs = {
1181
attr: shlex.quote(str(getattr(self, attr)))
1182
for attr in self.runtime_expansions}
1183
530
try:
1184
command = self.checker_command % escaped_attrs
1185
except TypeError as error:
1186
log.error('Could not format string "%s"',
1187
self.checker_command, exc_info=error)
1188
return True # Try again later
531
# In case checker_command has exactly one % operator
532
command = self.checker_command % self.host
533
except TypeError:
534
# Escape attributes for the shell
535
escaped_attrs = dict(
536
(attr,
537
re.escape(unicode(str(getattr(self, attr, "")),
538
errors=
539
'replace')))
540
for attr in
541
self.runtime_expansions)
542
543
try:
544
command = self.checker_command % escaped_attrs
545
except TypeError as error:
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
548
return True # Try again later
1189
549
self.current_checker_command = command
1190
log.info("Starting checker %r for %s", command, self.name)
1191
# We don't need to redirect stdout and stderr, since
1192
# in normal mode, that is already done by daemon(),
1193
# and in debug mode we don't want to. (Stdin is
1194
# always replaced by /dev/null.)
1195
# The exception is when not debugging but nevertheless
1196
# running in the foreground; use the previously
1197
# created wnull.
1198
popen_args = {"close_fds": True,
1199
"shell": True,
1200
"cwd": "/"}
1201
if (not self.server_settings["debug"]
1202
and self.server_settings["foreground"]):
1203
popen_args.update({"stdout": wnull,
1204
"stderr": wnull})
1205
pipe = multiprocessing.Pipe(duplex=False)
1206
self.checker = multiprocessing.Process(
1207
target=call_pipe,
1208
args=(pipe[1], subprocess.call, command),
1209
kwargs=popen_args)
1210
self.checker.start()
1211
self.checker_callback_tag = GLib.io_add_watch(
1212
GLib.IOChannel.unix_new(pipe[0].fileno()),
1213
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1214
self.checker_callback, pipe[0], command)
1215
if start_was_randomized:
1216
# We were started after a random delay; Schedule a new
1217
# checker to be started an 'interval' from now, and every
1218
# interval from then on.
1219
now = datetime.datetime.utcnow()
1220
self.checker_initiator_tag = GLib.timeout_add(
1221
int(self.interval.total_seconds() * 1000),
1222
self.start_checker)
1223
self.expires = max(self.expires, now + self.interval)
1224
# Don't start a new checker again after same random delay
1225
return False
1226
# Re-run this periodically if run by GLib.timeout_add
550
try:
551
logger.info("Starting checker %r for %s",
552
command, self.name)
553
# We don't need to redirect stdout and stderr, since
554
# in normal mode, that is already done by daemon(),
555
# and in debug mode we don't want to. (Stdin is
556
# always replaced by /dev/null.)
557
self.checker = subprocess.Popen(command,
558
close_fds=True,
559
shell=True, cwd="/")
560
self.checker_callback_tag = (gobject.child_watch_add
561
(self.checker.pid,
562
self.checker_callback,
563
data=command))
564
# The checker may have completed before the gobject
565
# watch was added. Check for this.
566
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
567
if pid:
568
gobject.source_remove(self.checker_callback_tag)
569
self.checker_callback(pid, status, command)
570
except OSError as error:
571
logger.error("Failed to start subprocess: %s",
572
error)
573
# Re-run this periodically if run by gobject.timeout_add
1227
574
return True
1228
575
1229
576
def stop_checker(self):
1230
577
"""Force the checker process, if any, to stop."""
1231
578
if self.checker_callback_tag:
1232
GLib.source_remove(self.checker_callback_tag)
579
gobject.source_remove(self.checker_callback_tag)
1233
580
self.checker_callback_tag = None
1234
581
if getattr(self, "checker", None) is None:
1235
582
return
1236
log.debug("Stopping checker for %(name)s", vars(self))
1237
self.checker.terminate()
583
logger.debug("Stopping checker for %(name)s", vars(self))
584
try:
585
os.kill(self.checker.pid, signal.SIGTERM)
586
#time.sleep(0.5)
587
#if self.checker.poll() is None:
588
# os.kill(self.checker.pid, signal.SIGKILL)
589
except OSError as error:
590
if error.errno != errno.ESRCH: # No such process
591
raise
1238
592
self.checker = None
1239
593
1240
1241
def dbus_service_property(dbus_interface,
1242
signature="v",
1243
access="readwrite",
1244
byte_arrays=False):
594
# Encrypts a client secret and stores it in a varible encrypted_secret
595
def encrypt_secret(self, key):
596
# Encryption-key need to be of a specific size, so we hash inputed key
597
hasheng = hashlib.sha256()
598
hasheng.update(key)
599
encryptionkey = hasheng.digest()
600
601
# Create validation hash so we know at decryption if it was sucessful
602
hasheng = hashlib.sha256()
603
hasheng.update(self.secret)
604
validationhash = hasheng.digest()
605
606
# Encrypt secret
607
iv = os.urandom(Crypto.Cipher.AES.block_size)
608
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
Crypto.Cipher.AES.MODE_CFB, iv)
610
ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
self.encrypted_secret = (ciphertext, iv)
612
613
# Decrypt a encrypted client secret
614
def decrypt_secret(self, key):
615
# Decryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
617
hasheng.update(key)
618
encryptionkey = hasheng.digest()
619
620
# Decrypt encrypted secret
621
ciphertext, iv = self.encrypted_secret
622
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
Crypto.Cipher.AES.MODE_CFB, iv)
624
plain = ciphereng.decrypt(ciphertext)
625
626
# Validate decrypted secret to know if it was succesful
627
hasheng = hashlib.sha256()
628
validationhash = plain[:hasheng.digest_size]
629
secret = plain[hasheng.digest_size:]
630
hasheng.update(secret)
631
632
# if validation fails, we use key as new secret. Otherwhise, we use
633
# the decrypted secret
634
if hasheng.digest() == validationhash:
635
self.secret = secret
636
else:
637
self.secret = key
638
del self.encrypted_secret
639
640
641
def dbus_service_property(dbus_interface, signature="v",
642
access="readwrite", byte_arrays=False):
1245
643
"""Decorators for marking methods of a DBusObjectWithProperties to
1246
644
become properties on the D-Bus.
1247
645
1248
646
The decorated method will be called with no arguments by "Get"
1249
647
and with one argument by "Set".
1250
648
1251
649
The parameters, where they are supported, are the same as
1252
650
dbus.service.method, except there is only "signature", since the
1253
651
type from Get() and the type sent to Set() is the same.
1256
654
# "Set" method, so we fail early here:
1257
655
if byte_arrays and signature != "ay":
1258
656
raise ValueError("Byte arrays not supported for non-'ay'"
1259
" signature {!r}".format(signature))
1260
657
" signature %r" % signature)
1261
658
def decorator(func):
1262
659
func._dbus_is_property = True
1263
660
func._dbus_interface = dbus_interface
1266
663
func._dbus_name = func.__name__
1267
664
if func._dbus_name.endswith("_dbus_property"):
1268
665
func._dbus_name = func._dbus_name[:-14]
1269
func._dbus_get_args_options = {"byte_arrays": byte_arrays}
1270
return func
1271
1272
return decorator
1273
1274
1275
def dbus_interface_annotations(dbus_interface):
1276
"""Decorator for marking functions returning interface annotations
1277
1278
Usage:
1279
1280
@dbus_interface_annotations("org.example.Interface")
1281
def _foo(self): # Function name does not matter
1282
return {"org.freedesktop.DBus.Deprecated": "true",
1283
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1284
"false"}
1285
"""
1286
1287
def decorator(func):
1288
func._dbus_is_interface = True
1289
func._dbus_interface = dbus_interface
1290
func._dbus_name = dbus_interface
1291
return func
1292
1293
return decorator
1294
1295
1296
def dbus_annotations(annotations):
1297
"""Decorator to annotate D-Bus methods, signals or properties
1298
Usage:
1299
1300
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1301
"org.freedesktop.DBus.Property."
1302
"EmitsChangedSignal": "false"})
1303
@dbus_service_property("org.example.Interface", signature="b",
1304
access="r")
1305
def Property_dbus_property(self):
1306
return dbus.Boolean(False)
1307
1308
See also the DBusObjectWithAnnotations class.
1309
"""
1310
1311
def decorator(func):
1312
func._dbus_annotations = annotations
1313
return func
1314
666
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
667
return func
1315
668
return decorator
1316
669
1317
670
1318
671
class DBusPropertyException(dbus.exceptions.DBusException):
1319
672
"""A base class for D-Bus property-related exceptions
1320
673
"""
1321
pass
674
def __unicode__(self):
675
return unicode(str(self))
1322
676
1323
677
1324
678
class DBusPropertyAccessException(DBusPropertyException):
1333
687
pass
1334
688
1335
689
1336
class DBusObjectWithAnnotations(dbus.service.Object):
1337
"""A D-Bus object with annotations.
1338
1339
Classes inheriting from this can use the dbus_annotations
1340
decorator to add annotations to methods or signals.
1341
"""
1342
1343
@staticmethod
1344
def _is_dbus_thing(thing):
1345
"""Returns a function testing if an attribute is a D-Bus thing
1346
1347
If called like _is_dbus_thing("method") it returns a function
1348
suitable for use as predicate to inspect.getmembers().
1349
"""
1350
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1351
False)
1352
1353
def _get_all_dbus_things(self, thing):
1354
"""Returns a generator of (name, attribute) pairs
1355
"""
1356
return ((getattr(athing.__get__(self), "_dbus_name", name),
1357
athing.__get__(self))
1358
for cls in self.__class__.__mro__
1359
for name, athing in
1360
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1361
1362
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1363
out_signature="s",
1364
path_keyword="object_path",
1365
connection_keyword="connection")
1366
def Introspect(self, object_path, connection):
1367
"""Overloading of standard D-Bus method.
1368
1369
Inserts annotation tags on methods and signals.
1370
"""
1371
xmlstring = dbus.service.Object.Introspect(self, object_path,
1372
connection)
1373
try:
1374
document = xml.dom.minidom.parseString(xmlstring)
1375
1376
for if_tag in document.getElementsByTagName("interface"):
1377
# Add annotation tags
1378
for typ in ("method", "signal"):
1379
for tag in if_tag.getElementsByTagName(typ):
1380
annots = dict()
1381
for name, prop in (self.
1382
_get_all_dbus_things(typ)):
1383
if (name == tag.getAttribute("name")
1384
and prop._dbus_interface
1385
== if_tag.getAttribute("name")):
1386
annots.update(getattr(
1387
prop, "_dbus_annotations", {}))
1388
for name, value in annots.items():
1389
ann_tag = document.createElement(
1390
"annotation")
1391
ann_tag.setAttribute("name", name)
1392
ann_tag.setAttribute("value", value)
1393
tag.appendChild(ann_tag)
1394
# Add interface annotation tags
1395
for annotation, value in dict(
1396
itertools.chain.from_iterable(
1397
annotations().items()
1398
for name, annotations
1399
in self._get_all_dbus_things("interface")
1400
if name == if_tag.getAttribute("name")
1401
)).items():
1402
ann_tag = document.createElement("annotation")
1403
ann_tag.setAttribute("name", annotation)
1404
ann_tag.setAttribute("value", value)
1405
if_tag.appendChild(ann_tag)
1406
# Fix argument name for the Introspect method itself
1407
if (if_tag.getAttribute("name")
1408
== dbus.INTROSPECTABLE_IFACE):
1409
for cn in if_tag.getElementsByTagName("method"):
1410
if cn.getAttribute("name") == "Introspect":
1411
for arg in cn.getElementsByTagName("arg"):
1412
if (arg.getAttribute("direction")
1413
== "out"):
1414
arg.setAttribute("name",
1415
"xml_data")
1416
xmlstring = document.toxml("utf-8")
1417
document.unlink()
1418
except (AttributeError, xml.dom.DOMException,
1419
xml.parsers.expat.ExpatError) as error:
1420
log.error("Failed to override Introspection method",
1421
exc_info=error)
1422
return xmlstring
1423
1424
1425
class DBusObjectWithProperties(DBusObjectWithAnnotations):
690
class DBusObjectWithProperties(dbus.service.Object):
1426
691
"""A D-Bus object with properties.
1427
692
1428
693
Classes inheriting from this can use the dbus_service_property
1429
694
decorator to expose methods as D-Bus properties. It exposes the
1430
695
standard Get(), Set(), and GetAll() methods on the D-Bus.
1431
696
"""
1432
697
698
@staticmethod
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
701
702
def _get_all_dbus_properties(self):
703
"""Returns a generator of (name, attribute) pairs
704
"""
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
706
for cls in self.__class__.__mro__
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
709
1433
710
def _get_dbus_property(self, interface_name, property_name):
1434
711
"""Returns a bound method if one exists which is a D-Bus
1435
712
property with the specified name and interface.
1436
713
"""
1437
for cls in self.__class__.__mro__:
1438
for name, value in inspect.getmembers(
1439
cls, self._is_dbus_thing("property")):
714
for cls in self.__class__.__mro__:
715
for name, value in (inspect.getmembers
716
(cls, self._is_dbus_property)):
1440
717
if (value._dbus_name == property_name
1441
718
and value._dbus_interface == interface_name):
1442
719
return value.__get__(self)
1443
720
1444
721
# No such property
1445
raise DBusPropertyNotFound("{}:{}.{}".format(
1446
self.dbus_object_path, interface_name, property_name))
1447
1448
@classmethod
1449
def _get_all_interface_names(cls):
1450
"""Get a sequence of all interfaces supported by an object"""
1451
return (name for name in set(getattr(getattr(x, attr),
1452
"_dbus_interface", None)
1453
for x in (inspect.getmro(cls))
1454
for attr in dir(x))
1455
if name is not None)
1456
1457
@dbus.service.method(dbus.PROPERTIES_IFACE,
1458
in_signature="ss",
722
raise DBusPropertyNotFound(self.dbus_object_path + ":"
723
+ interface_name + "."
724
+ property_name)
725
726
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1459
727
out_signature="v")
1460
728
def Get(self, interface_name, property_name):
1461
729
"""Standard D-Bus property Get() method, see D-Bus standard.
1467
735
if not hasattr(value, "variant_level"):
1468
736
return value
1469
737
return type(value)(value, variant_level=value.variant_level+1)
1470
738
1471
739
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1472
740
def Set(self, interface_name, property_name, value):
1473
741
"""Standard D-Bus property Set() method, see D-Bus standard.
1479
747
# The byte_arrays option is not supported yet on
1480
748
# signatures other than "ay".
1481
749
if prop._dbus_signature != "ay":
1482
raise ValueError("Byte arrays not supported for non-"
1483
"'ay' signature {!r}"
1484
.format(prop._dbus_signature))
1485
value = dbus.ByteArray(bytes(value))
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
1486
753
prop(value)
1487
1488
@dbus.service.method(dbus.PROPERTIES_IFACE,
1489
in_signature="s",
754
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1490
756
out_signature="a{sv}")
1491
757
def GetAll(self, interface_name):
1492
758
"""Standard D-Bus property GetAll() method, see D-Bus
1493
759
standard.
1494
760
1495
761
Note: Will not include properties with access="write".
1496
762
"""
1497
properties = {}
1498
for name, prop in self._get_all_dbus_things("property"):
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
1499
765
if (interface_name
1500
766
and interface_name != prop._dbus_interface):
1501
767
# Interface non-empty but did not match
1505
771
continue
1506
772
value = prop()
1507
773
if not hasattr(value, "variant_level"):
1508
properties[name] = value
774
all[name] = value
1509
775
continue
1510
properties[name] = type(value)(
1511
value, variant_level=value.variant_level + 1)
1512
return dbus.Dictionary(properties, signature="sv")
1513
1514
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1515
def PropertiesChanged(self, interface_name, changed_properties,
1516
invalidated_properties):
1517
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1518
standard.
1519
"""
1520
pass
1521
776
all[name] = type(value)(value, variant_level=
777
value.variant_level+1)
778
return dbus.Dictionary(all, signature="sv")
779
1522
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1523
781
out_signature="s",
1524
path_keyword="object_path",
1525
connection_keyword="connection")
782
path_keyword='object_path',
783
connection_keyword='connection')
1526
784
def Introspect(self, object_path, connection):
1527
"""Overloading of standard D-Bus method.
1528
1529
Inserts property tags and interface annotation tags.
785
"""Standard D-Bus method, overloaded to insert property tags.
1530
786
"""
1531
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1532
object_path,
1533
connection)
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
788
connection)
1534
789
try:
1535
790
document = xml.dom.minidom.parseString(xmlstring)
1536
1537
791
def make_tag(document, name, prop):
1538
792
e = document.createElement("property")
1539
793
e.setAttribute("name", name)
1540
794
e.setAttribute("type", prop._dbus_signature)
1541
795
e.setAttribute("access", prop._dbus_access)
1542
796
return e
1543
1544
797
for if_tag in document.getElementsByTagName("interface"):
1545
# Add property tags
1546
798
for tag in (make_tag(document, name, prop)
1547
799
for name, prop
1548
in self._get_all_dbus_things("property")
800
in self._get_all_dbus_properties()
1549
801
if prop._dbus_interface
1550
802
== if_tag.getAttribute("name")):
1551
803
if_tag.appendChild(tag)
1552
# Add annotation tags for properties
1553
for tag in if_tag.getElementsByTagName("property"):
1554
annots = dict()
1555
for name, prop in self._get_all_dbus_things(
1556
"property"):
1557
if (name == tag.getAttribute("name")
1558
and prop._dbus_interface
1559
== if_tag.getAttribute("name")):
1560
annots.update(getattr(
1561
prop, "_dbus_annotations", {}))
1562
for name, value in annots.items():
1563
ann_tag = document.createElement(
1564
"annotation")
1565
ann_tag.setAttribute("name", name)
1566
ann_tag.setAttribute("value", value)
1567
tag.appendChild(ann_tag)
1568
804
# Add the names to the return values for the
1569
805
# "org.freedesktop.DBus.Properties" methods
1570
806
if (if_tag.getAttribute("name")
1584
820
document.unlink()
1585
821
except (AttributeError, xml.dom.DOMException,
1586
822
xml.parsers.expat.ExpatError) as error:
1587
log.error("Failed to override Introspection method",
1588
exc_info=error)
1589
return xmlstring
1590
1591
1592
try:
1593
dbus.OBJECT_MANAGER_IFACE
1594
except AttributeError:
1595
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1596
1597
1598
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1599
"""A D-Bus object with an ObjectManager.
1600
1601
Classes inheriting from this exposes the standard
1602
GetManagedObjects call and the InterfacesAdded and
1603
InterfacesRemoved signals on the standard
1604
"org.freedesktop.DBus.ObjectManager" interface.
1605
1606
Note: No signals are sent automatically; they must be sent
1607
manually.
1608
"""
1609
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1610
out_signature="a{oa{sa{sv}}}")
1611
def GetManagedObjects(self):
1612
"""This function must be overridden"""
1613
raise NotImplementedError()
1614
1615
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1616
signature="oa{sa{sv}}")
1617
def InterfacesAdded(self, object_path, interfaces_and_properties):
1618
pass
1619
1620
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1621
def InterfacesRemoved(self, object_path, interfaces):
1622
pass
1623
1624
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1625
out_signature="s",
1626
path_keyword="object_path",
1627
connection_keyword="connection")
1628
def Introspect(self, object_path, connection):
1629
"""Overloading of standard D-Bus method.
1630
1631
Override return argument name of GetManagedObjects to be
1632
"objpath_interfaces_and_properties"
1633
"""
1634
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1635
object_path,
1636
connection)
1637
try:
1638
document = xml.dom.minidom.parseString(xmlstring)
1639
1640
for if_tag in document.getElementsByTagName("interface"):
1641
# Fix argument name for the GetManagedObjects method
1642
if (if_tag.getAttribute("name")
1643
== dbus.OBJECT_MANAGER_IFACE):
1644
for cn in if_tag.getElementsByTagName("method"):
1645
if (cn.getAttribute("name")
1646
== "GetManagedObjects"):
1647
for arg in cn.getElementsByTagName("arg"):
1648
if (arg.getAttribute("direction")
1649
== "out"):
1650
arg.setAttribute(
1651
"name",
1652
"objpath_interfaces"
1653
"_and_properties")
1654
xmlstring = document.toxml("utf-8")
1655
document.unlink()
1656
except (AttributeError, xml.dom.DOMException,
1657
xml.parsers.expat.ExpatError) as error:
1658
log.error("Failed to override Introspection method",
1659
exc_info=error)
1660
return xmlstring
1661
1662
1663
def datetime_to_dbus(dt, variant_level=0):
823
logger.error("Failed to override Introspection method",
824
error)
825
return xmlstring
826
827
828
def datetime_to_dbus (dt, variant_level=0):
1664
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1665
830
if dt is None:
1666
return dbus.String("", variant_level=variant_level)
1667
return dbus.String(dt.isoformat(), variant_level=variant_level)
1668
1669
1670
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1671
"""A class decorator; applied to a subclass of
1672
dbus.service.Object, it will add alternate D-Bus attributes with
1673
interface names according to the "alt_interface_names" mapping.
1674
Usage:
1675
1676
@alternate_dbus_interfaces({"org.example.Interface":
1677
"net.example.AlternateInterface"})
1678
class SampleDBusObject(dbus.service.Object):
1679
@dbus.service.method("org.example.Interface")
1680
def SampleDBusMethod():
1681
pass
1682
1683
The above "SampleDBusMethod" on "SampleDBusObject" will be
1684
reachable via two interfaces: "org.example.Interface" and
1685
"net.example.AlternateInterface", the latter of which will have
1686
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1687
"true", unless "deprecate" is passed with a False value.
1688
1689
This works for methods and signals, and also for D-Bus properties
1690
(from DBusObjectWithProperties) and interfaces (from the
1691
dbus_interface_annotations decorator).
831
return dbus.String("", variant_level = variant_level)
832
return dbus.String(dt.isoformat(),
833
variant_level=variant_level)
834
835
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
.__metaclass__):
837
"""Applied to an empty subclass of a D-Bus object, this metaclass
838
will add additional D-Bus attributes matching a certain pattern.
1692
839
"""
1693
1694
def wrapper(cls):
1695
for orig_interface_name, alt_interface_name in (
1696
alt_interface_names.items()):
1697
attr = {}
1698
interface_names = set()
1699
# Go though all attributes of the class
1700
for attrname, attribute in inspect.getmembers(cls):
840
def __new__(mcs, name, bases, attr):
841
# Go through all the base classes which could have D-Bus
842
# methods, signals, or properties in them
843
for base in (b for b in bases
844
if issubclass(b, dbus.service.Object)):
845
# Go though all attributes of the base class
846
for attrname, attribute in inspect.getmembers(base):
1701
847
# Ignore non-D-Bus attributes, and D-Bus attributes
1702
848
# with the wrong interface name
1703
849
if (not hasattr(attribute, "_dbus_interface")
1704
or not attribute._dbus_interface.startswith(
1705
orig_interface_name)):
850
or not attribute._dbus_interface
851
.startswith("se.recompile.Mandos")):
1706
852
continue
1707
853
# Create an alternate D-Bus interface name based on
1708
854
# the current name
1709
alt_interface = attribute._dbus_interface.replace(
1710
orig_interface_name, alt_interface_name)
1711
interface_names.add(alt_interface)
855
alt_interface = (attribute._dbus_interface
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
1712
858
# Is this a D-Bus signal?
1713
859
if getattr(attribute, "_dbus_is_signal", False):
1714
# Extract the original non-method undecorated
1715
# function by black magic
1716
if sys.version_info.major == 2:
1717
nonmethod_func = (dict(
860
# Extract the original non-method function by
861
# black magic
862
nonmethod_func = (dict(
1718
863
zip(attribute.func_code.co_freevars,
1719
attribute.__closure__))
1720
["func"].cell_contents)
1721
else:
1722
nonmethod_func = (dict(
1723
zip(attribute.__code__.co_freevars,
1724
attribute.__closure__))
1725
["func"].cell_contents)
864
attribute.__closure__))["func"]
865
.cell_contents)
1726
866
# Create a new, but exactly alike, function
1727
867
# object, and decorate it to be a new D-Bus signal
1728
868
# with the alternate D-Bus interface name
1729
new_function = copy_function(nonmethod_func)
1730
new_function = (dbus.service.signal(
1731
alt_interface,
1732
attribute._dbus_signature)(new_function))
1733
# Copy annotations, if any
1734
try:
1735
new_function._dbus_annotations = dict(
1736
attribute._dbus_annotations)
1737
except AttributeError:
1738
pass
1739
869
new_function = (dbus.service.signal
870
(alt_interface,
871
attribute._dbus_signature)
872
(types.FunctionType(
873
nonmethod_func.func_code,
874
nonmethod_func.func_globals,
875
nonmethod_func.func_name,
876
nonmethod_func.func_defaults,
877
nonmethod_func.func_closure)))
1740
878
# Define a creator of a function to call both the
1741
# original and alternate functions, so both the
1742
# original and alternate signals gets sent when
1743
# the function is called
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
1744
881
def fixscope(func1, func2):
1745
882
"""This function is a scope container to pass
1746
883
func1 and func2 to the "call_both" function
1747
884
outside of its arguments"""
1748
1749
@functools.wraps(func2)
1750
885
def call_both(*args, **kwargs):
1751
886
"""This function will emit two D-Bus
1752
887
signals by calling func1 and func2"""
1753
888
func1(*args, **kwargs)
1754
889
func2(*args, **kwargs)
1755
# Make wrapper function look like a D-Bus
1756
# signal
1757
for name, attr in inspect.getmembers(func2):
1758
if name.startswith("_dbus_"):
1759
setattr(call_both, name, attr)
1760
1761
890
return call_both
1762
891
# Create the "call_both" function and add it to
1763
892
# the class
1764
attr[attrname] = fixscope(attribute, new_function)
893
attr[attrname] = fixscope(attribute,
894
new_function)
1765
895
# Is this a D-Bus method?
1766
896
elif getattr(attribute, "_dbus_is_method", False):
1767
897
# Create a new, but exactly alike, function
1768
898
# object. Decorate it to be a new D-Bus method
1769
899
# with the alternate D-Bus interface name. Add it
1770
900
# to the class.
1771
attr[attrname] = (
1772
dbus.service.method(
1773
alt_interface,
1774
attribute._dbus_in_signature,
1775
attribute._dbus_out_signature)
1776
(copy_function(attribute)))
1777
# Copy annotations, if any
1778
try:
1779
attr[attrname]._dbus_annotations = dict(
1780
attribute._dbus_annotations)
1781
except AttributeError:
1782
pass
901
attr[attrname] = (dbus.service.method
902
(alt_interface,
903
attribute._dbus_in_signature,
904
attribute._dbus_out_signature)
905
(types.FunctionType
906
(attribute.func_code,
907
attribute.func_globals,
908
attribute.func_name,
909
attribute.func_defaults,
910
attribute.func_closure)))
1783
911
# Is this a D-Bus property?
1784
912
elif getattr(attribute, "_dbus_is_property", False):
1785
913
# Create a new, but exactly alike, function
1786
914
# object, and decorate it to be a new D-Bus
1787
915
# property with the alternate D-Bus interface
1788
916
# name. Add it to the class.
1789
attr[attrname] = (dbus_service_property(
1790
alt_interface, attribute._dbus_signature,
1791
attribute._dbus_access,
1792
attribute._dbus_get_args_options
1793
["byte_arrays"])
1794
(copy_function(attribute)))
1795
# Copy annotations, if any
1796
try:
1797
attr[attrname]._dbus_annotations = dict(
1798
attribute._dbus_annotations)
1799
except AttributeError:
1800
pass
1801
# Is this a D-Bus interface?
1802
elif getattr(attribute, "_dbus_is_interface", False):
1803
# Create a new, but exactly alike, function
1804
# object. Decorate it to be a new D-Bus interface
1805
# with the alternate D-Bus interface name. Add it
1806
# to the class.
1807
attr[attrname] = (
1808
dbus_interface_annotations(alt_interface)
1809
(copy_function(attribute)))
1810
if deprecate:
1811
# Deprecate all alternate interfaces
1812
iname = "_AlternateDBusNames_interface_annotation{}"
1813
for interface_name in interface_names:
1814
1815
@dbus_interface_annotations(interface_name)
1816
def func(self):
1817
return {"org.freedesktop.DBus.Deprecated":
1818
"true"}
1819
# Find an unused name
1820
for aname in (iname.format(i)
1821
for i in itertools.count()):
1822
if aname not in attr:
1823
attr[aname] = func
1824
break
1825
if interface_names:
1826
# Replace the class with a new subclass of it with
1827
# methods, signals, etc. as created above.
1828
if sys.version_info.major == 2:
1829
cls = type(b"{}Alternate".format(cls.__name__),
1830
(cls, ), attr)
1831
else:
1832
cls = type("{}Alternate".format(cls.__name__),
1833
(cls, ), attr)
1834
return cls
1835
1836
return wrapper
1837
1838
1839
@alternate_dbus_interfaces({"se.recompile.Mandos":
1840
"se.bsnet.fukt.Mandos"})
917
attr[attrname] = (dbus_service_property
918
(alt_interface,
919
attribute._dbus_signature,
920
attribute._dbus_access,
921
attribute
922
._dbus_get_args_options
923
["byte_arrays"])
924
(types.FunctionType
925
(attribute.func_code,
926
attribute.func_globals,
927
attribute.func_name,
928
attribute.func_defaults,
929
attribute.func_closure)))
930
return type.__new__(mcs, name, bases, attr)
931
1841
932
class ClientDBus(Client, DBusObjectWithProperties):
1842
933
"""A Client class using D-Bus
1843
934
1844
935
Attributes:
1845
936
dbus_object_path: dbus.ObjectPath
1846
937
bus: dbus.SystemBus()
1847
938
"""
1848
939
1849
940
runtime_expansions = (Client.runtime_expansions
1850
+ ("dbus_object_path", ))
1851
1852
_interface = "se.recompile.Mandos.Client"
1853
941
+ ("dbus_object_path",))
942
1854
943
# dbus.service.Object doesn't use super(), so we can't either.
1855
1856
def __init__(self, bus=None, *args, **kwargs):
944
945
def __init__(self, bus = None, *args, **kwargs):
1857
946
self.bus = bus
1858
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
1859
950
# Only now, when this client is initialized, can it show up on
1860
951
# the D-Bus
1861
client_object_name = str(self.name).translate(
952
client_object_name = unicode(self.name).translate(
1862
953
{ord("."): ord("_"),
1863
954
ord("-"): ord("_")})
1864
self.dbus_object_path = dbus.ObjectPath(
1865
"/clients/" + client_object_name)
955
self.dbus_object_path = (dbus.ObjectPath
956
("/clients/" + client_object_name))
1866
957
DBusObjectWithProperties.__init__(self, self.bus,
1867
958
self.dbus_object_path)
1868
1869
def notifychangeproperty(transform_func, dbus_name,
1870
type_func=lambda x: x,
1871
variant_level=1,
1872
invalidate_only=False,
1873
_interface=_interface):
959
960
def notifychangeproperty(transform_func,
961
dbus_name, type_func=lambda x: x,
962
variant_level=1):
1874
963
""" Modify a variable so that it's a property which announces
1875
964
its changes to DBus.
1876
965
1881
970
to the D-Bus. Default: no transform
1882
971
variant_level: D-Bus variant level. Default: 1
1883
972
"""
1884
attrname = "_{}".format(dbus_name)
1885
973
attrname = "_{0}".format(dbus_name)
1886
974
def setter(self, value):
1887
975
if hasattr(self, "dbus_object_path"):
1888
976
if (not hasattr(self, attrname) or
1889
977
type_func(getattr(self, attrname, None))
1890
978
!= type_func(value)):
1891
if invalidate_only:
1892
self.PropertiesChanged(
1893
_interface, dbus.Dictionary(),
1894
dbus.Array((dbus_name, )))
1895
else:
1896
dbus_value = transform_func(
1897
type_func(value),
1898
variant_level=variant_level)
1899
self.PropertyChanged(dbus.String(dbus_name),
1900
dbus_value)
1901
self.PropertiesChanged(
1902
_interface,
1903
dbus.Dictionary({dbus.String(dbus_name):
1904
dbus_value}),
1905
dbus.Array())
979
dbus_value = transform_func(type_func(value),
980
variant_level
981
=variant_level)
982
self.PropertyChanged(dbus.String(dbus_name),
983
dbus_value)
1906
984
setattr(self, attrname, value)
1907
985
1908
986
return property(lambda self: getattr(self, attrname), setter)
1909
987
988
1910
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1911
990
approvals_pending = notifychangeproperty(dbus.Boolean,
1912
991
"ApprovalPending",
1913
type_func=bool)
992
type_func = bool)
1914
993
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1915
994
last_enabled = notifychangeproperty(datetime_to_dbus,
1916
995
"LastEnabled")
1917
checker = notifychangeproperty(
1918
dbus.Boolean, "CheckerRunning",
1919
type_func=lambda checker: checker is not None)
996
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
997
type_func = lambda checker:
998
checker is not None)
1920
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1921
1000
"LastCheckedOK")
1922
last_checker_status = notifychangeproperty(dbus.Int16,
1923
"LastCheckerStatus")
1924
1001
last_approval_request = notifychangeproperty(
1925
1002
datetime_to_dbus, "LastApprovalRequest")
1926
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1927
1004
"ApprovedByDefault")
1928
approval_delay = notifychangeproperty(
1929
dbus.UInt64, "ApprovalDelay",
1930
type_func=lambda td: td.total_seconds() * 1000)
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1006
"ApprovalDelay",
1007
type_func =
1008
_timedelta_to_milliseconds)
1931
1009
approval_duration = notifychangeproperty(
1932
dbus.UInt64, "ApprovalDuration",
1933
type_func=lambda td: td.total_seconds() * 1000)
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1934
1012
host = notifychangeproperty(dbus.String, "Host")
1935
timeout = notifychangeproperty(
1936
dbus.UInt64, "Timeout",
1937
type_func=lambda td: td.total_seconds() * 1000)
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1014
type_func =
1015
_timedelta_to_milliseconds)
1938
1016
extended_timeout = notifychangeproperty(
1939
dbus.UInt64, "ExtendedTimeout",
1940
type_func=lambda td: td.total_seconds() * 1000)
1941
interval = notifychangeproperty(
1942
dbus.UInt64, "Interval",
1943
type_func=lambda td: td.total_seconds() * 1000)
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1020
"Interval",
1021
type_func =
1022
_timedelta_to_milliseconds)
1944
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1945
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1946
invalidate_only=True)
1947
1024
1948
1025
del notifychangeproperty
1949
1026
1950
1027
def __del__(self, *args, **kwargs):
1951
1028
try:
1952
1029
self.remove_from_connection()
1955
1032
if hasattr(DBusObjectWithProperties, "__del__"):
1956
1033
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1957
1034
Client.__del__(self, *args, **kwargs)
1958
1959
def checker_callback(self, source, condition,
1960
connection, command, *args, **kwargs):
1961
ret = Client.checker_callback(self, source, condition,
1962
connection, command, *args,
1963
**kwargs)
1964
exitstatus = self.last_checker_status
1965
if exitstatus >= 0:
1035
1036
def checker_callback(self, pid, condition, command,
1037
*args, **kwargs):
1038
self.checker_callback_tag = None
1039
self.checker = None
1040
if os.WIFEXITED(condition):
1041
exitstatus = os.WEXITSTATUS(condition)
1966
1042
# Emit D-Bus signal
1967
1043
self.CheckerCompleted(dbus.Int16(exitstatus),
1968
# This is specific to GNU libC
1969
dbus.Int64(exitstatus << 8),
1044
dbus.Int64(condition),
1970
1045
dbus.String(command))
1971
1046
else:
1972
1047
# Emit D-Bus signal
1973
1048
self.CheckerCompleted(dbus.Int16(-1),
1974
dbus.Int64(
1975
# This is specific to GNU libC
1976
(exitstatus << 8)
1977
| self.last_checker_signal),
1049
dbus.Int64(condition),
1978
1050
dbus.String(command))
1979
return ret
1980
1051
1052
return Client.checker_callback(self, pid, condition, command,
1053
*args, **kwargs)
1054
1981
1055
def start_checker(self, *args, **kwargs):
1982
old_checker_pid = getattr(self.checker, "pid", None)
1056
old_checker = self.checker
1057
if self.checker is not None:
1058
old_checker_pid = self.checker.pid
1059
else:
1060
old_checker_pid = None
1983
1061
r = Client.start_checker(self, *args, **kwargs)
1984
1062
# Only if new checker process was started
1985
1063
if (self.checker is not None
1987
1065
# Emit D-Bus signal
1988
1066
self.CheckerStarted(self.current_checker_command)
1989
1067
return r
1990
1068
1991
1069
def _reset_approved(self):
1992
self.approved = None
1070
self._approved = None
1993
1071
return False
1994
1072
1995
1073
def approve(self, value=True):
1996
self.approved = value
1997
GLib.timeout_add(int(self.approval_duration.total_seconds()
1998
* 1000), self._reset_approved)
1999
1074
self.send_changedstate()
2000
2001
# D-Bus methods, signals & properties
2002
2003
# Interfaces
2004
2005
# Signals
2006
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1077
(self.approval_duration),
1078
self._reset_approved)
1079
1080
1081
## D-Bus methods, signals & properties
1082
_interface = "se.recompile.Mandos.Client"
1083
1084
## Signals
1085
2007
1086
# CheckerCompleted - signal
2008
1087
@dbus.service.signal(_interface, signature="nxs")
2009
1088
def CheckerCompleted(self, exitcode, waitstatus, command):
2010
1089
"D-Bus signal"
2011
1090
pass
2012
1091
2013
1092
# CheckerStarted - signal
2014
1093
@dbus.service.signal(_interface, signature="s")
2015
1094
def CheckerStarted(self, command):
2016
1095
"D-Bus signal"
2017
1096
pass
2018
1097
2019
1098
# PropertyChanged - signal
2020
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2021
1099
@dbus.service.signal(_interface, signature="sv")
2022
1100
def PropertyChanged(self, property, value):
2023
1101
"D-Bus signal"
2024
1102
pass
2025
1103
2026
1104
# GotSecret - signal
2027
1105
@dbus.service.signal(_interface)
2028
1106
def GotSecret(self):
2031
1109
server to mandos-client
2032
1110
"""
2033
1111
pass
2034
1112
2035
1113
# Rejected - signal
2036
1114
@dbus.service.signal(_interface, signature="s")
2037
1115
def Rejected(self, reason):
2038
1116
"D-Bus signal"
2039
1117
pass
2040
1118
2041
1119
# NeedApproval - signal
2042
1120
@dbus.service.signal(_interface, signature="tb")
2043
1121
def NeedApproval(self, timeout, default):
2044
1122
"D-Bus signal"
2045
1123
return self.need_approval()
2046
2047
# Methods
2048
1124
1125
# NeRwequest - signal
1126
@dbus.service.signal(_interface, signature="s")
1127
def NewRequest(self, ip):
1128
"""D-Bus signal
1129
Is sent after a client request a password.
1130
"""
1131
pass
1132
1133
## Methods
1134
2049
1135
# Approve - method
2050
1136
@dbus.service.method(_interface, in_signature="b")
2051
1137
def Approve(self, value):
2052
1138
self.approve(value)
2053
1139
2054
1140
# CheckedOK - method
2055
1141
@dbus.service.method(_interface)
2056
1142
def CheckedOK(self):
2057
1143
self.checked_ok()
2058
1144
2059
1145
# Enable - method
2060
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2061
1146
@dbus.service.method(_interface)
2062
1147
def Enable(self):
2063
1148
"D-Bus method"
2064
1149
self.enable()
2065
1150
2066
1151
# StartChecker - method
2067
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2068
1152
@dbus.service.method(_interface)
2069
1153
def StartChecker(self):
2070
1154
"D-Bus method"
2071
1155
self.start_checker()
2072
1156
2073
1157
# Disable - method
2074
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2075
1158
@dbus.service.method(_interface)
2076
1159
def Disable(self):
2077
1160
"D-Bus method"
2078
1161
self.disable()
2079
1162
2080
1163
# StopChecker - method
2081
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2082
1164
@dbus.service.method(_interface)
2083
1165
def StopChecker(self):
2084
1166
self.stop_checker()
2085
2086
# Properties
2087
1167
1168
## Properties
1169
2088
1170
# ApprovalPending - property
2089
1171
@dbus_service_property(_interface, signature="b", access="read")
2090
1172
def ApprovalPending_dbus_property(self):
2091
1173
return dbus.Boolean(bool(self.approvals_pending))
2092
1174
2093
1175
# ApprovedByDefault - property
2094
@dbus_service_property(_interface,
2095
signature="b",
1176
@dbus_service_property(_interface, signature="b",
2096
1177
access="readwrite")
2097
1178
def ApprovedByDefault_dbus_property(self, value=None):
2098
1179
if value is None: # get
2099
1180
return dbus.Boolean(self.approved_by_default)
2100
1181
self.approved_by_default = bool(value)
2101
1182
2102
1183
# ApprovalDelay - property
2103
@dbus_service_property(_interface,
2104
signature="t",
1184
@dbus_service_property(_interface, signature="t",
2105
1185
access="readwrite")
2106
1186
def ApprovalDelay_dbus_property(self, value=None):
2107
1187
if value is None: # get
2108
return dbus.UInt64(self.approval_delay.total_seconds()
2109
* 1000)
1188
return dbus.UInt64(self.approval_delay_milliseconds())
2110
1189
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2111
1190
2112
1191
# ApprovalDuration - property
2113
@dbus_service_property(_interface,
2114
signature="t",
1192
@dbus_service_property(_interface, signature="t",
2115
1193
access="readwrite")
2116
1194
def ApprovalDuration_dbus_property(self, value=None):
2117
1195
if value is None: # get
2118
return dbus.UInt64(self.approval_duration.total_seconds()
2119
* 1000)
1196
return dbus.UInt64(_timedelta_to_milliseconds(
1197
self.approval_duration))
2120
1198
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2121
1199
2122
1200
# Name - property
2123
@dbus_annotations(
2124
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2125
1201
@dbus_service_property(_interface, signature="s", access="read")
2126
1202
def Name_dbus_property(self):
2127
1203
return dbus.String(self.name)
2128
2129
# KeyID - property
2130
@dbus_annotations(
2131
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2132
@dbus_service_property(_interface, signature="s", access="read")
2133
def KeyID_dbus_property(self):
2134
return dbus.String(self.key_id)
2135
1204
2136
1205
# Fingerprint - property
2137
@dbus_annotations(
2138
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2139
1206
@dbus_service_property(_interface, signature="s", access="read")
2140
1207
def Fingerprint_dbus_property(self):
2141
1208
return dbus.String(self.fingerprint)
2142
1209
2143
1210
# Host - property
2144
@dbus_service_property(_interface,
2145
signature="s",
1211
@dbus_service_property(_interface, signature="s",
2146
1212
access="readwrite")
2147
1213
def Host_dbus_property(self, value=None):
2148
1214
if value is None: # get
2149
1215
return dbus.String(self.host)
2150
self.host = str(value)
2151
1216
self.host = value
1217
2152
1218
# Created - property
2153
@dbus_annotations(
2154
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2155
1219
@dbus_service_property(_interface, signature="s", access="read")
2156
1220
def Created_dbus_property(self):
2157
return datetime_to_dbus(self.created)
2158
1221
return dbus.String(datetime_to_dbus(self.created))
1222
2159
1223
# LastEnabled - property
2160
1224
@dbus_service_property(_interface, signature="s", access="read")
2161
1225
def LastEnabled_dbus_property(self):
2162
1226
return datetime_to_dbus(self.last_enabled)
2163
1227
2164
1228
# Enabled - property
2165
@dbus_service_property(_interface,
2166
signature="b",
1229
@dbus_service_property(_interface, signature="b",
2167
1230
access="readwrite")
2168
1231
def Enabled_dbus_property(self, value=None):
2169
1232
if value is None: # get
2172
1235
self.enable()
2173
1236
else:
2174
1237
self.disable()
2175
1238
2176
1239
# LastCheckedOK - property
2177
@dbus_service_property(_interface,
2178
signature="s",
1240
@dbus_service_property(_interface, signature="s",
2179
1241
access="readwrite")
2180
1242
def LastCheckedOK_dbus_property(self, value=None):
2181
1243
if value is not None:
2182
1244
self.checked_ok()
2183
1245
return
2184
1246
return datetime_to_dbus(self.last_checked_ok)
2185
2186
# LastCheckerStatus - property
2187
@dbus_service_property(_interface, signature="n", access="read")
2188
def LastCheckerStatus_dbus_property(self):
2189
return dbus.Int16(self.last_checker_status)
2190
1247
2191
1248
# Expires - property
2192
1249
@dbus_service_property(_interface, signature="s", access="read")
2193
1250
def Expires_dbus_property(self):
2194
1251
return datetime_to_dbus(self.expires)
2195
1252
2196
1253
# LastApprovalRequest - property
2197
1254
@dbus_service_property(_interface, signature="s", access="read")
2198
1255
def LastApprovalRequest_dbus_property(self):
2199
1256
return datetime_to_dbus(self.last_approval_request)
2200
1257
2201
1258
# Timeout - property
2202
@dbus_service_property(_interface,
2203
signature="t",
1259
@dbus_service_property(_interface, signature="t",
2204
1260
access="readwrite")
2205
1261
def Timeout_dbus_property(self, value=None):
2206
1262
if value is None: # get
2207
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2208
old_timeout = self.timeout
1263
return dbus.UInt64(self.timeout_milliseconds())
2209
1264
self.timeout = datetime.timedelta(0, 0, 0, value)
2210
# Reschedule disabling
2211
if self.enabled:
2212
now = datetime.datetime.utcnow()
2213
self.expires += self.timeout - old_timeout
2214
if self.expires <= now:
2215
# The timeout has passed
2216
self.disable()
2217
else:
2218
if (getattr(self, "disable_initiator_tag", None)
2219
is None):
2220
return
2221
GLib.source_remove(self.disable_initiator_tag)
2222
self.disable_initiator_tag = GLib.timeout_add(
2223
int((self.expires - now).total_seconds() * 1000),
2224
self.disable)
2225
1265
if getattr(self, "disable_initiator_tag", None) is None:
1266
return
1267
# Reschedule timeout
1268
gobject.source_remove(self.disable_initiator_tag)
1269
self.disable_initiator_tag = None
1270
self.expires = None
1271
time_to_die = _timedelta_to_milliseconds((self
1272
.last_checked_ok
1273
+ self.timeout)
1274
- datetime.datetime
1275
.utcnow())
1276
if time_to_die <= 0:
1277
# The timeout has passed
1278
self.disable()
1279
else:
1280
self.expires = (datetime.datetime.utcnow()
1281
+ datetime.timedelta(milliseconds =
1282
time_to_die))
1283
self.disable_initiator_tag = (gobject.timeout_add
1284
(time_to_die, self.disable))
1285
2226
1286
# ExtendedTimeout - property
2227
@dbus_service_property(_interface,
2228
signature="t",
1287
@dbus_service_property(_interface, signature="t",
2229
1288
access="readwrite")
2230
1289
def ExtendedTimeout_dbus_property(self, value=None):
2231
1290
if value is None: # get
2232
return dbus.UInt64(self.extended_timeout.total_seconds()
2233
* 1000)
1291
return dbus.UInt64(self.extended_timeout_milliseconds())
2234
1292
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2235
1293
2236
1294
# Interval - property
2237
@dbus_service_property(_interface,
2238
signature="t",
1295
@dbus_service_property(_interface, signature="t",
2239
1296
access="readwrite")
2240
1297
def Interval_dbus_property(self, value=None):
2241
1298
if value is None: # get
2242
return dbus.UInt64(self.interval.total_seconds() * 1000)
1299
return dbus.UInt64(self.interval_milliseconds())
2243
1300
self.interval = datetime.timedelta(0, 0, 0, value)
2244
1301
if getattr(self, "checker_initiator_tag", None) is None:
2245
1302
return
2246
if self.enabled:
2247
# Reschedule checker run
2248
GLib.source_remove(self.checker_initiator_tag)
2249
self.checker_initiator_tag = GLib.timeout_add(
2250
value, self.start_checker)
2251
self.start_checker() # Start one now, too
2252
1303
# Reschedule checker run
1304
gobject.source_remove(self.checker_initiator_tag)
1305
self.checker_initiator_tag = (gobject.timeout_add
1306
(value, self.start_checker))
1307
self.start_checker() # Start one now, too
1308
2253
1309
# Checker - property
2254
@dbus_service_property(_interface,
2255
signature="s",
1310
@dbus_service_property(_interface, signature="s",
2256
1311
access="readwrite")
2257
1312
def Checker_dbus_property(self, value=None):
2258
1313
if value is None: # get
2259
1314
return dbus.String(self.checker_command)
2260
self.checker_command = str(value)
2261
1315
self.checker_command = value
1316
2262
1317
# CheckerRunning - property
2263
@dbus_service_property(_interface,
2264
signature="b",
1318
@dbus_service_property(_interface, signature="b",
2265
1319
access="readwrite")
2266
1320
def CheckerRunning_dbus_property(self, value=None):
2267
1321
if value is None: # get
2270
1324
self.start_checker()
2271
1325
else:
2272
1326
self.stop_checker()
2273
1327
2274
1328
# ObjectPath - property
2275
@dbus_annotations(
2276
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2277
"org.freedesktop.DBus.Deprecated": "true"})
2278
1329
@dbus_service_property(_interface, signature="o", access="read")
2279
1330
def ObjectPath_dbus_property(self):
2280
return self.dbus_object_path # is already a dbus.ObjectPath
2281
1331
return self.dbus_object_path # is already a dbus.ObjectPath
1332
2282
1333
# Secret = property
2283
@dbus_annotations(
2284
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2285
"invalidates"})
2286
@dbus_service_property(_interface,
2287
signature="ay",
2288
access="write",
2289
byte_arrays=True)
1334
@dbus_service_property(_interface, signature="ay",
1335
access="write", byte_arrays=True)
2290
1336
def Secret_dbus_property(self, value):
2291
self.secret = bytes(value)
2292
1337
self.secret = str(value)
1338
2293
1339
del _interface
2294
1340
2295
1341
2296
class ProxyClient:
2297
def __init__(self, child_pipe, key_id, fpr, address):
1342
class ProxyClient(object):
1343
def __init__(self, child_pipe, fpr, address):
2298
1344
self._pipe = child_pipe
2299
self._pipe.send(("init", key_id, fpr, address))
1345
self._pipe.send(('init', fpr, address))
2300
1346
if not self._pipe.recv():
2301
raise KeyError(key_id or fpr)
2302
1347
raise KeyError()
1348
2303
1349
def __getattribute__(self, name):
2304
if name == "_pipe":
1350
if(name == '_pipe'):
2305
1351
return super(ProxyClient, self).__getattribute__(name)
2306
self._pipe.send(("getattr", name))
1352
self._pipe.send(('getattr', name))
2307
1353
data = self._pipe.recv()
2308
if data[0] == "data":
1354
if data[0] == 'data':
2309
1355
return data[1]
2310
if data[0] == "function":
2311
1356
if data[0] == 'function':
2312
1357
def func(*args, **kwargs):
2313
self._pipe.send(("funcall", name, args, kwargs))
1358
self._pipe.send(('funcall', name, args, kwargs))
2314
1359
return self._pipe.recv()[1]
2315
2316
1360
return func
2317
1361
2318
1362
def __setattr__(self, name, value):
2319
if name == "_pipe":
1363
if(name == '_pipe'):
2320
1364
return super(ProxyClient, self).__setattr__(name, value)
2321
self._pipe.send(("setattr", name, value))
1365
self._pipe.send(('setattr', name, value))
2322
1366
1367
class ClientDBusTransitional(ClientDBus):
1368
__metaclass__ = AlternateDBusNamesMetaclass
2323
1369
2324
1370
class ClientHandler(socketserver.BaseRequestHandler, object):
2325
1371
"""A class to handle client connections.
2326
1372
2327
1373
Instantiated once for each connection to handle it.
2328
1374
Note: This will run in its own forked process."""
2329
1375
2330
1376
def handle(self):
2331
1377
with contextlib.closing(self.server.child_pipe) as child_pipe:
2332
log.info("TCP connection from: %s",
2333
str(self.client_address))
2334
log.debug("Pipe FD: %d", self.server.child_pipe.fileno())
2335
2336
session = gnutls.ClientSession(self.request)
2337
2338
# priority = ":".join(("NONE", "+VERS-TLS1.1",
2339
# "+AES-256-CBC", "+SHA1",
2340
# "+COMP-NULL", "+CTYPE-OPENPGP",
2341
# "+DHE-DSS"))
1378
logger.info("TCP connection from: %s",
1379
unicode(self.client_address))
1380
logger.debug("Pipe FD: %d",
1381
self.server.child_pipe.fileno())
1382
1383
session = (gnutls.connection
1384
.ClientSession(self.request,
1385
gnutls.connection
1386
.X509Credentials()))
1387
1388
# Note: gnutls.connection.X509Credentials is really a
1389
# generic GnuTLS certificate credentials object so long as
1390
# no X.509 keys are added to it. Therefore, we can use it
1391
# here despite using OpenPGP certificates.
1392
1393
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1394
# "+AES-256-CBC", "+SHA1",
1395
# "+COMP-NULL", "+CTYPE-OPENPGP",
1396
# "+DHE-DSS"))
2342
1397
# Use a fallback default, since this MUST be set.
2343
1398
priority = self.server.gnutls_priority
2344
1399
if priority is None:
2345
1400
priority = "NORMAL"
2346
gnutls.priority_set_direct(session,
2347
priority.encode("utf-8"), None)
2348
1401
(gnutls.library.functions
1402
.gnutls_priority_set_direct(session._c_object,
1403
priority, None))
1404
2349
1405
# Start communication using the Mandos protocol
2350
1406
# Get protocol number
2351
1407
line = self.request.makefile().readline()
2352
log.debug("Protocol version: %r", line)
1408
logger.debug("Protocol version: %r", line)
2353
1409
try:
2354
1410
if int(line.strip().split()[0]) > 1:
2355
raise RuntimeError(line)
1411
raise RuntimeError
2356
1412
except (ValueError, IndexError, RuntimeError) as error:
2357
log.error("Unknown protocol version: %s", error)
1413
logger.error("Unknown protocol version: %s", error)
2358
1414
return
2359
1415
2360
1416
# Start GnuTLS connection
2361
1417
try:
2362
1418
session.handshake()
2363
except gnutls.Error as error:
2364
log.warning("Handshake failed: %s", error)
1419
except gnutls.errors.GNUTLSError as error:
1420
logger.warning("Handshake failed: %s", error)
2365
1421
# Do not run session.bye() here: the session is not
2366
1422
# established. Just abandon the request.
2367
1423
return
2368
log.debug("Handshake succeeded")
2369
1424
logger.debug("Handshake succeeded")
1425
2370
1426
approval_required = False
2371
1427
try:
2372
if gnutls.has_rawpk:
2373
fpr = b""
2374
try:
2375
key_id = self.key_id(
2376
self.peer_certificate(session))
2377
except (TypeError, gnutls.Error) as error:
2378
log.warning("Bad certificate: %s", error)
2379
return
2380
log.debug("Key ID: %s",
2381
key_id.decode("utf-8",
2382
errors="replace"))
2383
2384
else:
2385
key_id = b""
2386
try:
2387
fpr = self.fingerprint(
2388
self.peer_certificate(session))
2389
except (TypeError, gnutls.Error) as error:
2390
log.warning("Bad certificate: %s", error)
2391
return
2392
log.debug("Fingerprint: %s", fpr)
2393
2394
try:
2395
client = ProxyClient(child_pipe, key_id, fpr,
1428
try:
1429
fpr = self.fingerprint(self.peer_certificate
1430
(session))
1431
except (TypeError,
1432
gnutls.errors.GNUTLSError) as error:
1433
logger.warning("Bad certificate: %s", error)
1434
return
1435
logger.debug("Fingerprint: %s", fpr)
1436
if self.server.use_dbus:
1437
# Emit D-Bus signal
1438
client.NewRequest(str(self.client_address))
1439
1440
try:
1441
client = ProxyClient(child_pipe, fpr,
2396
1442
self.client_address)
2397
1443
except KeyError:
2398
1444
return
2399
1445
2400
1446
if client.approval_delay:
2401
1447
delay = client.approval_delay
2402
1448
client.approvals_pending += 1
2403
1449
approval_required = True
2404
1450
2405
1451
while True:
2406
1452
if not client.enabled:
2407
log.info("Client %s is disabled", client.name)
1453
logger.info("Client %s is disabled",
1454
client.name)
2408
1455
if self.server.use_dbus:
2409
1456
# Emit D-Bus signal
2410
1457
client.Rejected("Disabled")
2411
1458
return
2412
2413
if client.approved or not client.approval_delay:
2414
# We are approved or approval is disabled
1459
1460
if client._approved or not client.approval_delay:
1461
#We are approved or approval is disabled
2415
1462
break
2416
elif client.approved is None:
2417
log.info("Client %s needs approval",
2418
client.name)
1463
elif client._approved is None:
1464
logger.info("Client %s needs approval",
1465
client.name)
2419
1466
if self.server.use_dbus:
2420
1467
# Emit D-Bus signal
2421
1468
client.NeedApproval(
2422
client.approval_delay.total_seconds()
2423
* 1000, client.approved_by_default)
1469
client.approval_delay_milliseconds(),
1470
client.approved_by_default)
2424
1471
else:
2425
log.warning("Client %s was not approved",
2426
client.name)
1472
logger.warning("Client %s was not approved",
1473
client.name)
2427
1474
if self.server.use_dbus:
2428
1475
# Emit D-Bus signal
2429
1476
client.Rejected("Denied")
2430
1477
return
2431
2432
# wait until timeout or approved
1478
1479
#wait until timeout or approved
2433
1480
time = datetime.datetime.now()
2434
1481
client.changedstate.acquire()
2435
client.changedstate.wait(delay.total_seconds())
1482
(client.changedstate.wait
1483
(float(client._timedelta_to_milliseconds(delay)
1484
/ 1000)))
2436
1485
client.changedstate.release()
2437
1486
time2 = datetime.datetime.now()
2438
1487
if (time2 - time) >= delay:
2439
1488
if not client.approved_by_default:
2440
log.warning("Client %s timed out while"
2441
" waiting for approval",
2442
client.name)
1489
logger.warning("Client %s timed out while"
1490
" waiting for approval",
1491
client.name)
2443
1492
if self.server.use_dbus:
2444
1493
# Emit D-Bus signal
2445
1494
client.Rejected("Approval timed out")
2448
1497
break
2449
1498
else:
2450
1499
delay -= time2 - time
2451
2452
try:
2453
session.send(client.secret)
2454
except gnutls.Error as error:
2455
log.warning("gnutls send failed", exc_info=error)
2456
return
2457
2458
log.info("Sending secret to %s", client.name)
1500
1501
sent_size = 0
1502
while sent_size < len(client.secret):
1503
try:
1504
sent = session.send(client.secret[sent_size:])
1505
except gnutls.errors.GNUTLSError as error:
1506
logger.warning("gnutls send failed")
1507
return
1508
logger.debug("Sent: %d, remaining: %d",
1509
sent, len(client.secret)
1510
- (sent_size + sent))
1511
sent_size += sent
1512
1513
logger.info("Sending secret to %s", client.name)
2459
1514
# bump the timeout using extended_timeout
2460
client.bump_timeout(client.extended_timeout)
1515
client.checked_ok(client.extended_timeout)
2461
1516
if self.server.use_dbus:
2462
1517
# Emit D-Bus signal
2463
1518
client.GotSecret()
2464
1519
2465
1520
finally:
2466
1521
if approval_required:
2467
1522
client.approvals_pending -= 1
2468
1523
try:
2469
1524
session.bye()
2470
except gnutls.Error as error:
2471
log.warning("GnuTLS bye failed", exc_info=error)
2472
1525
except gnutls.errors.GNUTLSError as error:
1526
logger.warning("GnuTLS bye failed")
1527
2473
1528
@staticmethod
2474
1529
def peer_certificate(session):
2475
"Return the peer's certificate as a bytestring"
2476
try:
2477
cert_type = gnutls.certificate_type_get2(
2478
session, gnutls.CTYPE_PEERS)
2479
except AttributeError:
2480
cert_type = gnutls.certificate_type_get(session)
2481
if gnutls.has_rawpk:
2482
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2483
else:
2484
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2485
# If not a valid certificate type...
2486
if cert_type not in valid_cert_types:
2487
log.info("Cert type %r not in %r", cert_type,
2488
valid_cert_types)
2489
# ...return invalid data
2490
return b""
1530
"Return the peer's OpenPGP certificate as a bytestring"
1531
# If not an OpenPGP certificate...
1532
if (gnutls.library.functions
1533
.gnutls_certificate_type_get(session._c_object)
1534
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1535
# ...do the normal thing
1536
return session.peer_certificate
2491
1537
list_size = ctypes.c_uint(1)
2492
cert_list = (gnutls.certificate_get_peers
2493
(session, ctypes.byref(list_size)))
1538
cert_list = (gnutls.library.functions
1539
.gnutls_certificate_get_peers
1540
(session._c_object, ctypes.byref(list_size)))
2494
1541
if not bool(cert_list) and list_size.value != 0:
2495
raise gnutls.Error("error getting peer certificate")
1542
raise gnutls.errors.GNUTLSError("error getting peer"
1543
" certificate")
2496
1544
if list_size.value == 0:
2497
1545
return None
2498
1546
cert = cert_list[0]
2499
1547
return ctypes.string_at(cert.data, cert.size)
2500
2501
@staticmethod
2502
def key_id(certificate):
2503
"Convert a certificate bytestring to a hexdigit key ID"
2504
# New GnuTLS "datum" with the public key
2505
datum = gnutls.datum_t(
2506
ctypes.cast(ctypes.c_char_p(certificate),
2507
ctypes.POINTER(ctypes.c_ubyte)),
2508
ctypes.c_uint(len(certificate)))
2509
# XXX all these need to be created in the gnutls "module"
2510
# New empty GnuTLS certificate
2511
pubkey = gnutls.pubkey_t()
2512
gnutls.pubkey_init(ctypes.byref(pubkey))
2513
# Import the raw public key into the certificate
2514
gnutls.pubkey_import(pubkey,
2515
ctypes.byref(datum),
2516
gnutls.X509_FMT_DER)
2517
# New buffer for the key ID
2518
buf = ctypes.create_string_buffer(32)
2519
buf_len = ctypes.c_size_t(len(buf))
2520
# Get the key ID from the raw public key into the buffer
2521
gnutls.pubkey_get_key_id(
2522
pubkey,
2523
gnutls.KEYID_USE_SHA256,
2524
ctypes.cast(ctypes.byref(buf),
2525
ctypes.POINTER(ctypes.c_ubyte)),
2526
ctypes.byref(buf_len))
2527
# Deinit the certificate
2528
gnutls.pubkey_deinit(pubkey)
2529
2530
# Convert the buffer to a Python bytestring
2531
key_id = ctypes.string_at(buf, buf_len.value)
2532
# Convert the bytestring to hexadecimal notation
2533
hex_key_id = binascii.hexlify(key_id).upper()
2534
return hex_key_id
2535
1548
2536
1549
@staticmethod
2537
1550
def fingerprint(openpgp):
2538
1551
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2539
1552
# New GnuTLS "datum" with the OpenPGP public key
2540
datum = gnutls.datum_t(
2541
ctypes.cast(ctypes.c_char_p(openpgp),
2542
ctypes.POINTER(ctypes.c_ubyte)),
2543
ctypes.c_uint(len(openpgp)))
1553
datum = (gnutls.library.types
1554
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1555
ctypes.POINTER
1556
(ctypes.c_ubyte)),
1557
ctypes.c_uint(len(openpgp))))
2544
1558
# New empty GnuTLS certificate
2545
crt = gnutls.openpgp_crt_t()
2546
gnutls.openpgp_crt_init(ctypes.byref(crt))
1559
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1560
(gnutls.library.functions
1561
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2547
1562
# Import the OpenPGP public key into the certificate
2548
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2549
gnutls.OPENPGP_FMT_RAW)
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1565
gnutls.library.constants
1566
.GNUTLS_OPENPGP_FMT_RAW))
2550
1567
# Verify the self signature in the key
2551
1568
crtverify = ctypes.c_uint()
2552
gnutls.openpgp_crt_verify_self(crt, 0,
2553
ctypes.byref(crtverify))
1569
(gnutls.library.functions
1570
.gnutls_openpgp_crt_verify_self(crt, 0,
1571
ctypes.byref(crtverify)))
2554
1572
if crtverify.value != 0:
2555
gnutls.openpgp_crt_deinit(crt)
2556
raise gnutls.CertificateSecurityError(code
2557
=crtverify.value)
1573
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1574
raise (gnutls.errors.CertificateSecurityError
1575
("Verify failed"))
2558
1576
# New buffer for the fingerprint
2559
1577
buf = ctypes.create_string_buffer(20)
2560
1578
buf_len = ctypes.c_size_t()
2561
1579
# Get the fingerprint from the certificate into the buffer
2562
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2563
ctypes.byref(buf_len))
1580
(gnutls.library.functions
1581
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1582
ctypes.byref(buf_len)))
2564
1583
# Deinit the certificate
2565
gnutls.openpgp_crt_deinit(crt)
1584
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2566
1585
# Convert the buffer to a Python bytestring
2567
1586
fpr = ctypes.string_at(buf, buf_len.value)
2568
1587
# Convert the bytestring to hexadecimal notation
2569
hex_fpr = binascii.hexlify(fpr).upper()
1588
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2570
1589
return hex_fpr
2571
1590
2572
1591
2573
class MultiprocessingMixIn:
1592
class MultiprocessingMixIn(object):
2574
1593
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2575
2576
1594
def sub_process_main(self, request, address):
2577
1595
try:
2578
1596
self.finish_request(request, address)
2579
except Exception:
1597
except:
2580
1598
self.handle_error(request, address)
2581
1599
self.close_request(request)
2582
1600
2583
1601
def process_request(self, request, address):
2584
1602
"""Start a new process to process the request."""
2585
proc = multiprocessing.Process(target=self.sub_process_main,
2586
args=(request, address))
1603
proc = multiprocessing.Process(target = self.sub_process_main,
1604
args = (request,
1605
address))
2587
1606
proc.start()
2588
1607
return proc
2589
1608
2590
1609
2591
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1610
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2592
1611
""" adds a pipe to the MixIn """
2593
2594
1612
def process_request(self, request, client_address):
2595
1613
"""Overrides and wraps the original process_request().
2596
1614
2597
1615
This function creates a new pipe in self.pipe
2598
1616
"""
2599
1617
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2600
1618
2601
1619
proc = MultiprocessingMixIn.process_request(self, request,
2602
1620
client_address)
2603
1621
self.child_pipe.close()
2604
1622
self.add_pipe(parent_pipe, proc)
2605
1623
2606
1624
def add_pipe(self, parent_pipe, proc):
2607
1625
"""Dummy function; override as necessary"""
2608
raise NotImplementedError()
1626
raise NotImplementedError
2609
1627
2610
1628
2611
1629
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2612
socketserver.TCPServer):
2613
"""IPv6-capable TCP server. Accepts None as address and/or port
2614
1630
socketserver.TCPServer, object):
1631
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1632
2615
1633
Attributes:
2616
1634
enabled: Boolean; whether this server is activated yet
2617
1635
interface: None or a network interface name (string)
2618
1636
use_ipv6: Boolean; to use IPv6 or not
2619
1637
"""
2620
2621
1638
def __init__(self, server_address, RequestHandlerClass,
2622
interface=None,
2623
use_ipv6=True,
2624
socketfd=None):
2625
"""If socketfd is set, use that file descriptor instead of
2626
creating a new one with socket.socket().
2627
"""
1639
interface=None, use_ipv6=True):
2628
1640
self.interface = interface
2629
1641
if use_ipv6:
2630
1642
self.address_family = socket.AF_INET6
2631
if socketfd is not None:
2632
# Save the file descriptor
2633
self.socketfd = socketfd
2634
# Save the original socket.socket() function
2635
self.socket_socket = socket.socket
2636
2637
# To implement --socket, we monkey patch socket.socket.
2638
#
2639
# (When socketserver.TCPServer is a new-style class, we
2640
# could make self.socket into a property instead of monkey
2641
# patching socket.socket.)
2642
#
2643
# Create a one-time-only replacement for socket.socket()
2644
@functools.wraps(socket.socket)
2645
def socket_wrapper(*args, **kwargs):
2646
# Restore original function so subsequent calls are
2647
# not affected.
2648
socket.socket = self.socket_socket
2649
del self.socket_socket
2650
# This time only, return a new socket object from the
2651
# saved file descriptor.
2652
return socket.fromfd(self.socketfd, *args, **kwargs)
2653
# Replace socket.socket() function with wrapper
2654
socket.socket = socket_wrapper
2655
# The socketserver.TCPServer.__init__ will call
2656
# socket.socket(), which might be our replacement,
2657
# socket_wrapper(), if socketfd was set.
2658
1643
socketserver.TCPServer.__init__(self, server_address,
2659
1644
RequestHandlerClass)
2660
2661
1645
def server_bind(self):
2662
1646
"""This overrides the normal server_bind() function
2663
1647
to bind to an interface if one was specified, and also NOT to
2664
1648
bind to an address or port if they were not specified."""
2665
global SO_BINDTODEVICE
2666
1649
if self.interface is not None:
2667
1650
if SO_BINDTODEVICE is None:
2668
# Fall back to a hard-coded value which seems to be
2669
# common enough.
2670
log.warning("SO_BINDTODEVICE not found, trying 25")
2671
SO_BINDTODEVICE = 25
2672
try:
2673
self.socket.setsockopt(
2674
socket.SOL_SOCKET, SO_BINDTODEVICE,
2675
(self.interface + "\0").encode("utf-8"))
2676
except socket.error as error:
2677
if error.errno == errno.EPERM:
2678
log.error("No permission to bind to interface %s",
2679
self.interface)
2680
elif error.errno == errno.ENOPROTOOPT:
2681
log.error("SO_BINDTODEVICE not available; cannot"
2682
" bind to interface %s", self.interface)
2683
elif error.errno == errno.ENODEV:
2684
log.error("Interface %s does not exist, cannot"
2685
" bind", self.interface)
2686
else:
2687
raise
1651
logger.error("SO_BINDTODEVICE does not exist;"
1652
" cannot bind to interface %s",
1653
self.interface)
1654
else:
1655
try:
1656
self.socket.setsockopt(socket.SOL_SOCKET,
1657
SO_BINDTODEVICE,
1658
str(self.interface
1659
+ '\0'))
1660
except socket.error as error:
1661
if error[0] == errno.EPERM:
1662
logger.error("No permission to"
1663
" bind to interface %s",
1664
self.interface)
1665
elif error[0] == errno.ENOPROTOOPT:
1666
logger.error("SO_BINDTODEVICE not available;"
1667
" cannot bind to interface %s",
1668
self.interface)
1669
else:
1670
raise
2688
1671
# Only bind(2) the socket if we really need to.
2689
1672
if self.server_address[0] or self.server_address[1]:
2690
if self.server_address[1]:
2691
self.allow_reuse_address = True
2692
1673
if not self.server_address[0]:
2693
1674
if self.address_family == socket.AF_INET6:
2694
any_address = "::" # in6addr_any
1675
any_address = "::" # in6addr_any
2695
1676
else:
2696
any_address = "0.0.0.0" # INADDR_ANY
1677
any_address = socket.INADDR_ANY
2697
1678
self.server_address = (any_address,
2698
1679
self.server_address[1])
2699
1680
elif not self.server_address[1]:
2700
self.server_address = (self.server_address[0], 0)
1681
self.server_address = (self.server_address[0],
1682
0)
2701
1683
# if self.interface:
2702
1684
# self.server_address = (self.server_address[0],
2703
1685
# 0, # port
2709
1691
2710
1692
class MandosServer(IPv6_TCPServer):
2711
1693
"""Mandos server.
2712
1694
2713
1695
Attributes:
2714
1696
clients: set of Client objects
2715
1697
gnutls_priority GnuTLS priority string
2716
1698
use_dbus: Boolean; to emit D-Bus signals or not
2717
2718
Assumes a GLib.MainLoop event loop.
1699
1700
Assumes a gobject.MainLoop event loop.
2719
1701
"""
2720
2721
1702
def __init__(self, server_address, RequestHandlerClass,
2722
interface=None,
2723
use_ipv6=True,
2724
clients=None,
2725
gnutls_priority=None,
2726
use_dbus=True,
2727
socketfd=None):
1703
interface=None, use_ipv6=True, clients=None,
1704
gnutls_priority=None, use_dbus=True):
2728
1705
self.enabled = False
2729
1706
self.clients = clients
2730
1707
if self.clients is None:
2733
1710
self.gnutls_priority = gnutls_priority
2734
1711
IPv6_TCPServer.__init__(self, server_address,
2735
1712
RequestHandlerClass,
2736
interface=interface,
2737
use_ipv6=use_ipv6,
2738
socketfd=socketfd)
2739
1713
interface = interface,
1714
use_ipv6 = use_ipv6)
2740
1715
def server_activate(self):
2741
1716
if self.enabled:
2742
1717
return socketserver.TCPServer.server_activate(self)
2743
1718
2744
1719
def enable(self):
2745
1720
self.enabled = True
2746
1721
2747
1722
def add_pipe(self, parent_pipe, proc):
2748
1723
# Call "handle_ipc" for both data and EOF events
2749
GLib.io_add_watch(
2750
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2751
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2752
functools.partial(self.handle_ipc,
2753
parent_pipe=parent_pipe,
2754
proc=proc))
2755
2756
def handle_ipc(self, source, condition,
2757
parent_pipe=None,
2758
proc=None,
2759
client_object=None):
1724
gobject.io_add_watch(parent_pipe.fileno(),
1725
gobject.IO_IN | gobject.IO_HUP,
1726
functools.partial(self.handle_ipc,
1727
parent_pipe =
1728
parent_pipe,
1729
proc = proc))
1730
1731
def handle_ipc(self, source, condition, parent_pipe=None,
1732
proc = None, client_object=None):
1733
condition_names = {
1734
gobject.IO_IN: "IN", # There is data to read.
1735
gobject.IO_OUT: "OUT", # Data can be written (without
1736
# blocking).
1737
gobject.IO_PRI: "PRI", # There is urgent data to read.
1738
gobject.IO_ERR: "ERR", # Error condition.
1739
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1740
# broken, usually for pipes and
1741
# sockets).
1742
}
1743
conditions_string = ' | '.join(name
1744
for cond, name in
1745
condition_names.iteritems()
1746
if cond & condition)
2760
1747
# error, or the other end of multiprocessing.Pipe has closed
2761
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1748
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2762
1749
# Wait for other process to exit
2763
1750
proc.join()
2764
1751
return False
2765
1752
2766
1753
# Read a request from the child
2767
1754
request = parent_pipe.recv()
2768
1755
command = request[0]
2769
2770
if command == "init":
2771
key_id = request[1].decode("ascii")
2772
fpr = request[2].decode("ascii")
2773
address = request[3]
2774
2775
for c in self.clients.values():
2776
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2777
"27AE41E4649B934CA495991B7852B855"):
2778
continue
2779
if key_id and c.key_id == key_id:
2780
client = c
2781
break
2782
if fpr and c.fingerprint == fpr:
1756
1757
if command == 'init':
1758
fpr = request[1]
1759
address = request[2]
1760
1761
for c in self.clients.itervalues():
1762
if c.fingerprint == fpr:
2783
1763
client = c
2784
1764
break
2785
1765
else:
2786
log.info("Client not found for key ID: %s, address:"
2787
" %s", key_id or fpr, address)
1766
logger.info("Client not found for fingerprint: %s, ad"
1767
"dress: %s", fpr, address)
2788
1768
if self.use_dbus:
2789
1769
# Emit D-Bus signal
2790
mandos_dbus_service.ClientNotFound(key_id or fpr,
1770
mandos_dbus_service.ClientNotFound(fpr,
2791
1771
address[0])
2792
1772
parent_pipe.send(False)
2793
1773
return False
2794
2795
GLib.io_add_watch(
2796
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2797
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2798
functools.partial(self.handle_ipc,
2799
parent_pipe=parent_pipe,
2800
proc=proc,
2801
client_object=client))
1774
1775
gobject.io_add_watch(parent_pipe.fileno(),
1776
gobject.IO_IN | gobject.IO_HUP,
1777
functools.partial(self.handle_ipc,
1778
parent_pipe =
1779
parent_pipe,
1780
proc = proc,
1781
client_object =
1782
client))
2802
1783
parent_pipe.send(True)
2803
1784
# remove the old hook in favor of the new above hook on
2804
1785
# same fileno
2805
1786
return False
2806
if command == "funcall":
1787
if command == 'funcall':
2807
1788
funcname = request[1]
2808
1789
args = request[2]
2809
1790
kwargs = request[3]
2810
2811
parent_pipe.send(("data", getattr(client_object,
1791
1792
parent_pipe.send(('data', getattr(client_object,
2812
1793
funcname)(*args,
2813
**kwargs)))
2814
2815
if command == "getattr":
1794
**kwargs)))
1795
1796
if command == 'getattr':
2816
1797
attrname = request[1]
2817
if isinstance(client_object.__getattribute__(attrname),
2818
collections.abc.Callable):
2819
parent_pipe.send(("function", ))
1798
if callable(client_object.__getattribute__(attrname)):
1799
parent_pipe.send(('function',))
2820
1800
else:
2821
parent_pipe.send((
2822
"data", client_object.__getattribute__(attrname)))
2823
2824
if command == "setattr":
1801
parent_pipe.send(('data', client_object
1802
.__getattribute__(attrname)))
1803
1804
if command == 'setattr':
2825
1805
attrname = request[1]
2826
1806
value = request[2]
2827
1807
setattr(client_object, attrname, value)
2828
1808
2829
1809
return True
2830
1810
2831
1811
2832
def rfc3339_duration_to_delta(duration):
2833
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2834
2835
>>> timedelta = datetime.timedelta
2836
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2837
True
2838
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2839
True
2840
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2841
True
2842
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2843
True
2844
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2845
True
2846
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2847
True
2848
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2849
True
2850
>>> del timedelta
2851
"""
2852
2853
# Parsing an RFC 3339 duration with regular expressions is not
2854
# possible - there would have to be multiple places for the same
2855
# values, like seconds. The current code, while more esoteric, is
2856
# cleaner without depending on a parsing library. If Python had a
2857
# built-in library for parsing we would use it, but we'd like to
2858
# avoid excessive use of external libraries.
2859
2860
# New type for defining tokens, syntax, and semantics all-in-one
2861
Token = collections.namedtuple("Token", (
2862
"regexp", # To match token; if "value" is not None, must have
2863
# a "group" containing digits
2864
"value", # datetime.timedelta or None
2865
"followers")) # Tokens valid after this token
2866
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2867
# the "duration" ABNF definition in RFC 3339, Appendix A.
2868
token_end = Token(re.compile(r"$"), None, frozenset())
2869
token_second = Token(re.compile(r"(\d+)S"),
2870
datetime.timedelta(seconds=1),
2871
frozenset((token_end, )))
2872
token_minute = Token(re.compile(r"(\d+)M"),
2873
datetime.timedelta(minutes=1),
2874
frozenset((token_second, token_end)))
2875
token_hour = Token(re.compile(r"(\d+)H"),
2876
datetime.timedelta(hours=1),
2877
frozenset((token_minute, token_end)))
2878
token_time = Token(re.compile(r"T"),
2879
None,
2880
frozenset((token_hour, token_minute,
2881
token_second)))
2882
token_day = Token(re.compile(r"(\d+)D"),
2883
datetime.timedelta(days=1),
2884
frozenset((token_time, token_end)))
2885
token_month = Token(re.compile(r"(\d+)M"),
2886
datetime.timedelta(weeks=4),
2887
frozenset((token_day, token_end)))
2888
token_year = Token(re.compile(r"(\d+)Y"),
2889
datetime.timedelta(weeks=52),
2890
frozenset((token_month, token_end)))
2891
token_week = Token(re.compile(r"(\d+)W"),
2892
datetime.timedelta(weeks=1),
2893
frozenset((token_end, )))
2894
token_duration = Token(re.compile(r"P"), None,
2895
frozenset((token_year, token_month,
2896
token_day, token_time,
2897
token_week)))
2898
# Define starting values:
2899
# Value so far
2900
value = datetime.timedelta()
2901
found_token = None
2902
# Following valid tokens
2903
followers = frozenset((token_duration, ))
2904
# String left to parse
2905
s = duration
2906
# Loop until end token is found
2907
while found_token is not token_end:
2908
# Search for any currently valid tokens
2909
for token in followers:
2910
match = token.regexp.match(s)
2911
if match is not None:
2912
# Token found
2913
if token.value is not None:
2914
# Value found, parse digits
2915
factor = int(match.group(1), 10)
2916
# Add to value so far
2917
value += factor * token.value
2918
# Strip token from string
2919
s = token.regexp.sub("", s, 1)
2920
# Go to found token
2921
found_token = token
2922
# Set valid next tokens
2923
followers = found_token.followers
2924
break
2925
else:
2926
# No currently valid tokens were found
2927
raise ValueError("Invalid RFC 3339 duration: {!r}"
2928
.format(duration))
2929
# End token found
2930
return value
2931
2932
2933
1812
def string_to_delta(interval):
2934
1813
"""Parse a string and return a datetime.timedelta
2935
2936
>>> string_to_delta("7d") == datetime.timedelta(7)
2937
True
2938
>>> string_to_delta("60s") == datetime.timedelta(0, 60)
2939
True
2940
>>> string_to_delta("60m") == datetime.timedelta(0, 3600)
2941
True
2942
>>> string_to_delta("24h") == datetime.timedelta(1)
2943
True
2944
>>> string_to_delta("1w") == datetime.timedelta(7)
2945
True
2946
>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)
2947
True
1814
1815
>>> string_to_delta('7d')
1816
datetime.timedelta(7)
1817
>>> string_to_delta('60s')
1818
datetime.timedelta(0, 60)
1819
>>> string_to_delta('60m')
1820
datetime.timedelta(0, 3600)
1821
>>> string_to_delta('24h')
1822
datetime.timedelta(1)
1823
>>> string_to_delta('1w')
1824
datetime.timedelta(7)
1825
>>> string_to_delta('5m 30s')
1826
datetime.timedelta(0, 330)
2948
1827
"""
2949
2950
try:
2951
return rfc3339_duration_to_delta(interval)
2952
except ValueError:
2953
pass
2954
2955
1828
timevalue = datetime.timedelta(0)
2956
1829
for s in interval.split():
2957
1830
try:
2958
suffix = s[-1]
1831
suffix = unicode(s[-1])
2959
1832
value = int(s[:-1])
2960
1833
if suffix == "d":
2961
1834
delta = datetime.timedelta(value)
2968
1841
elif suffix == "w":
2969
1842
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2970
1843
else:
2971
raise ValueError("Unknown suffix {!r}".format(suffix))
2972
except IndexError as e:
1844
raise ValueError("Unknown suffix %r" % suffix)
1845
except (ValueError, IndexError) as e:
2973
1846
raise ValueError(*(e.args))
2974
1847
timevalue += delta
2975
1848
return timevalue
2976
1849
2977
1850
2978
def daemon(nochdir=False, noclose=False):
1851
def if_nametoindex(interface):
1852
"""Call the C function if_nametoindex(), or equivalent
1853
1854
Note: This function cannot accept a unicode string."""
1855
global if_nametoindex
1856
try:
1857
if_nametoindex = (ctypes.cdll.LoadLibrary
1858
(ctypes.util.find_library("c"))
1859
.if_nametoindex)
1860
except (OSError, AttributeError):
1861
logger.warning("Doing if_nametoindex the hard way")
1862
def if_nametoindex(interface):
1863
"Get an interface index the hard way, i.e. using fcntl()"
1864
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1865
with contextlib.closing(socket.socket()) as s:
1866
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1867
struct.pack(str("16s16x"),
1868
interface))
1869
interface_index = struct.unpack(str("I"),
1870
ifreq[16:20])[0]
1871
return interface_index
1872
return if_nametoindex(interface)
1873
1874
1875
def daemon(nochdir = False, noclose = False):
2979
1876
"""See daemon(3). Standard BSD Unix function.
2980
1877
2981
1878
This should really exist as os.daemon, but it doesn't (yet)."""
2982
1879
if os.fork():
2983
1880
sys.exit()
2988
1885
sys.exit()
2989
1886
if not noclose:
2990
1887
# Close all standard open file descriptors
2991
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1888
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2992
1889
if not stat.S_ISCHR(os.fstat(null).st_mode):
2993
1890
raise OSError(errno.ENODEV,
2994
"{} not a character device"
2995
.format(os.devnull))
1891
"%s not a character device"
1892
% os.path.devnull)
2996
1893
os.dup2(null, sys.stdin.fileno())
2997
1894
os.dup2(null, sys.stdout.fileno())
2998
1895
os.dup2(null, sys.stderr.fileno())
3001
1898
3002
1899
3003
1900
def main():
3004
1901
3005
1902
##################################################################
3006
1903
# Parsing of options, both command line and config file
3007
1904
3008
1905
parser = argparse.ArgumentParser()
3009
1906
parser.add_argument("-v", "--version", action="version",
3010
version="%(prog)s {}".format(version),
1907
version = "%%(prog)s %s" % version,
3011
1908
help="show version number and exit")
3012
1909
parser.add_argument("-i", "--interface", metavar="IF",
3013
1910
help="Bind to interface IF")
3019
1916
help="Run self-test")
3020
1917
parser.add_argument("--debug", action="store_true",
3021
1918
help="Debug mode; run in foreground and log"
3022
" to terminal", default=None)
1919
" to terminal")
3023
1920
parser.add_argument("--debuglevel", metavar="LEVEL",
3024
1921
help="Debug level for stdout output")
3025
1922
parser.add_argument("--priority", help="GnuTLS"
3032
1929
" files")
3033
1930
parser.add_argument("--no-dbus", action="store_false",
3034
1931
dest="use_dbus", help="Do not provide D-Bus"
3035
" system bus interface", default=None)
1932
" system bus interface")
3036
1933
parser.add_argument("--no-ipv6", action="store_false",
3037
dest="use_ipv6", help="Do not use IPv6",
3038
default=None)
1934
dest="use_ipv6", help="Do not use IPv6")
3039
1935
parser.add_argument("--no-restore", action="store_false",
3040
dest="restore", help="Do not restore stored"
3041
" state", default=None)
3042
parser.add_argument("--socket", type=int,
3043
help="Specify a file descriptor to a network"
3044
" socket to use instead of creating one")
3045
parser.add_argument("--statedir", metavar="DIR",
3046
help="Directory to save/restore state in")
3047
parser.add_argument("--foreground", action="store_true",
3048
help="Run in foreground", default=None)
3049
parser.add_argument("--no-zeroconf", action="store_false",
3050
dest="zeroconf", help="Do not use Zeroconf",
3051
default=None)
1936
dest="restore", help="Do not restore stored state",
1937
default=True)
3052
1938
3053
1939
options = parser.parse_args()
3054
1940
1941
if options.check:
1942
import doctest
1943
doctest.testmod()
1944
sys.exit()
1945
3055
1946
# Default values for config file for server-global settings
3056
if gnutls.has_rawpk:
3057
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3058
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3059
else:
3060
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3061
":+SIGN-DSA-SHA256")
3062
server_defaults = {"interface": "",
3063
"address": "",
3064
"port": "",
3065
"debug": "False",
3066
"priority": priority,
3067
"servicename": "Mandos",
3068
"use_dbus": "True",
3069
"use_ipv6": "True",
3070
"debuglevel": "",
3071
"restore": "True",
3072
"socket": "",
3073
"statedir": "/var/lib/mandos",
3074
"foreground": "False",
3075
"zeroconf": "True",
3076
}
3077
del priority
3078
1947
server_defaults = { "interface": "",
1948
"address": "",
1949
"port": "",
1950
"debug": "False",
1951
"priority":
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
"servicename": "Mandos",
1954
"use_dbus": "True",
1955
"use_ipv6": "True",
1956
"debuglevel": "",
1957
}
1958
3079
1959
# Parse config file for server-global settings
3080
server_config = configparser.ConfigParser(server_defaults)
1960
server_config = configparser.SafeConfigParser(server_defaults)
3081
1961
del server_defaults
3082
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3083
# Convert the ConfigParser object to a dict
1962
server_config.read(os.path.join(options.configdir,
1963
"mandos.conf"))
1964
# Convert the SafeConfigParser object to a dict
3084
1965
server_settings = server_config.defaults()
3085
1966
# Use the appropriate methods on the non-string config options
3086
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3087
"foreground", "zeroconf"):
1967
for option in ("debug", "use_dbus", "use_ipv6"):
3088
1968
server_settings[option] = server_config.getboolean("DEFAULT",
3089
1969
option)
3090
1970
if server_settings["port"]:
3091
1971
server_settings["port"] = server_config.getint("DEFAULT",
3092
1972
"port")
3093
if server_settings["socket"]:
3094
server_settings["socket"] = server_config.getint("DEFAULT",
3095
"socket")
3096
# Later, stdin will, and stdout and stderr might, be dup'ed
3097
# over with an opened os.devnull. But we don't want this to
3098
# happen with a supplied network socket.
3099
if 0 <= server_settings["socket"] <= 2:
3100
server_settings["socket"] = os.dup(server_settings
3101
["socket"])
3102
1973
del server_config
3103
1974
3104
1975
# Override the settings from the config file with command line
3105
1976
# options, if set.
3106
1977
for option in ("interface", "address", "port", "debug",
3107
"priority", "servicename", "configdir", "use_dbus",
3108
"use_ipv6", "debuglevel", "restore", "statedir",
3109
"socket", "foreground", "zeroconf"):
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3110
1980
value = getattr(options, option)
3111
1981
if value is not None:
3112
1982
server_settings[option] = value
3113
1983
del options
3114
1984
# Force all strings to be unicode
3115
1985
for option in server_settings.keys():
3116
if isinstance(server_settings[option], bytes):
3117
server_settings[option] = (server_settings[option]
3118
.decode("utf-8"))
3119
# Force all boolean options to be boolean
3120
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3121
"foreground", "zeroconf"):
3122
server_settings[option] = bool(server_settings[option])
3123
# Debug implies foreground
3124
if server_settings["debug"]:
3125
server_settings["foreground"] = True
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
3126
1988
# Now we have our good server settings in "server_settings"
3127
1989
3128
1990
##################################################################
3129
3130
if (not server_settings["zeroconf"]
3131
and not (server_settings["port"]
3132
or server_settings["socket"] != "")):
3133
parser.error("Needs port or socket to work without Zeroconf")
3134
1991
3135
1992
# For convenience
3136
1993
debug = server_settings["debug"]
3137
1994
debuglevel = server_settings["debuglevel"]
3138
1995
use_dbus = server_settings["use_dbus"]
3139
1996
use_ipv6 = server_settings["use_ipv6"]
3140
stored_state_path = os.path.join(server_settings["statedir"],
3141
stored_state_file)
3142
foreground = server_settings["foreground"]
3143
zeroconf = server_settings["zeroconf"]
3144
3145
if debug:
3146
initlogger(debug, logging.DEBUG)
3147
else:
3148
if not debuglevel:
3149
initlogger(debug)
3150
else:
3151
level = getattr(logging, debuglevel.upper())
3152
initlogger(debug, level)
3153
1997
3154
1998
if server_settings["servicename"] != "Mandos":
3155
syslogger.setFormatter(
3156
logging.Formatter("Mandos ({}) [%(process)d]:"
3157
" %(levelname)s: %(message)s".format(
3158
server_settings["servicename"])))
3159
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
2003
3160
2004
# Parse config file with clients
3161
client_config = configparser.ConfigParser(Client.client_defaults)
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2007
"interval": "2m",
2008
"checker": "fping -q -- %%(host)s",
2009
"host": "",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2012
}
2013
client_config = configparser.SafeConfigParser(client_defaults)
3162
2014
client_config.read(os.path.join(server_settings["configdir"],
3163
2015
"clients.conf"))
3164
2016
3165
2017
global mandos_dbus_service
3166
2018
mandos_dbus_service = None
3167
3168
socketfd = None
3169
if server_settings["socket"] != "":
3170
socketfd = server_settings["socket"]
3171
tcp_server = MandosServer(
3172
(server_settings["address"], server_settings["port"]),
3173
ClientHandler,
3174
interface=(server_settings["interface"] or None),
3175
use_ipv6=use_ipv6,
3176
gnutls_priority=server_settings["priority"],
3177
use_dbus=use_dbus,
3178
socketfd=socketfd)
3179
if not foreground:
3180
pidfilename = "/run/mandos.pid"
3181
if not os.path.isdir("/run/."):
3182
pidfilename = "/var/run/mandos.pid"
3183
pidfile = None
3184
try:
3185
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3186
except IOError as e:
3187
log.error("Could not open file %r", pidfilename,
3188
exc_info=e)
3189
3190
for name, group in (("_mandos", "_mandos"),
3191
("mandos", "mandos"),
3192
("nobody", "nogroup")):
3193
try:
3194
uid = pwd.getpwnam(name).pw_uid
3195
gid = pwd.getpwnam(group).pw_gid
3196
break
2019
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2022
ClientHandler,
2023
interface=(server_settings["interface"]
2024
or None),
2025
use_ipv6=use_ipv6,
2026
gnutls_priority=
2027
server_settings["priority"],
2028
use_dbus=use_dbus)
2029
if not debug:
2030
pidfilename = "/var/run/mandos.pid"
2031
try:
2032
pidfile = open(pidfilename, "w")
2033
except IOError:
2034
logger.error("Could not open file %r", pidfilename)
2035
2036
try:
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2039
except KeyError:
2040
try:
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
3197
2043
except KeyError:
3198
continue
3199
else:
3200
uid = 65534
3201
gid = 65534
2044
try:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
2047
except KeyError:
2048
uid = 65534
2049
gid = 65534
3202
2050
try:
3203
2051
os.setgid(gid)
3204
2052
os.setuid(uid)
3205
log.debug("Did setuid/setgid to %s:%s", uid, gid)
3206
2053
except OSError as error:
3207
log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,
3208
os.strerror(error.errno))
3209
if error.errno != errno.EPERM:
3210
raise
3211
2054
if error[0] != errno.EPERM:
2055
raise error
2056
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2059
if debuglevel:
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
2062
3212
2063
if debug:
2064
logger.setLevel(logging.DEBUG)
3213
2065
# Enable all possible GnuTLS debugging
3214
2066
3215
2067
# "Use a log level over 10 to enable all debugging options."
3216
2068
# - GnuTLS manual
3217
gnutls.global_set_log_level(11)
3218
3219
@gnutls.log_func
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2070
2071
@gnutls.library.types.gnutls_log_func
3220
2072
def debug_gnutls(level, string):
3221
log.debug("GnuTLS: %s",
3222
string[:-1].decode("utf-8", errors="replace"))
3223
3224
gnutls.global_set_log_function(debug_gnutls)
3225
2073
logger.debug("GnuTLS: %s", string[:-1])
2074
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
2077
3226
2078
# Redirect stdin so all checkers get /dev/null
3227
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3228
2080
os.dup2(null, sys.stdin.fileno())
3229
2081
if null > 2:
3230
2082
os.close(null)
3231
2083
else:
2084
# No console logging
2085
logger.removeHandler(console)
2086
3232
2087
# Need to fork before connecting to D-Bus
3233
if not foreground:
2088
if not debug:
3234
2089
# Close all input and output, do double fork, etc.
3235
2090
daemon()
3236
3237
if gi.version_info < (3, 10, 2):
3238
# multiprocessing will use threads, so before we use GLib we
3239
# need to inform GLib that threads will be used.
3240
GLib.threads_init()
3241
2091
3242
2092
global main_loop
3243
2093
# From the Avahi example code
3244
DBusGMainLoop(set_as_default=True)
3245
main_loop = GLib.MainLoop()
3246
if use_dbus or zeroconf:
3247
bus = dbus.SystemBus()
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
2096
bus = dbus.SystemBus()
3248
2097
# End of Avahi example code
3249
2098
if use_dbus:
3250
2099
try:
3251
2100
bus_name = dbus.service.BusName("se.recompile.Mandos",
3252
bus,
3253
do_not_queue=True)
3254
old_bus_name = dbus.service.BusName(
3255
"se.bsnet.fukt.Mandos", bus,
3256
do_not_queue=True)
3257
except dbus.exceptions.DBusException as e:
3258
log.error("Disabling D-Bus:", exc_info=e)
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2104
do_not_queue=True))
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
3259
2107
use_dbus = False
3260
2108
server_settings["use_dbus"] = False
3261
2109
tcp_server.use_dbus = False
3262
if zeroconf:
3263
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3264
service = AvahiServiceToSyslog(
3265
name=server_settings["servicename"],
3266
servicetype="_mandos._tcp",
3267
protocol=protocol,
3268
bus=bus)
3269
if server_settings["interface"]:
3270
service.interface = if_nametoindex(
3271
server_settings["interface"].encode("utf-8"))
3272
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
2118
3273
2119
global multiprocessing_manager
3274
2120
multiprocessing_manager = multiprocessing.Manager()
3275
2121
3276
2122
client_class = Client
3277
2123
if use_dbus:
3278
client_class = functools.partial(ClientDBus, bus=bus)
3279
3280
client_settings = Client.config_parser(client_config)
2124
client_class = functools.partial(ClientDBusTransitional,
2125
bus = bus)
2126
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2131
lambda section:
2132
client_config.getboolean(section, "approved_by_default"),
2133
}
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2138
dict((setting,
2139
(value if setting not in special_settings
2140
else special_settings[setting](clientname)))
2141
for setting, value in client_config.items(clientname)))
2142
for clientname in client_config.sections())
2143
3281
2144
old_client_settings = {}
3282
clients_data = {}
3283
3284
# This is used to redirect stdout and stderr for checker processes
3285
global wnull
3286
wnull = open(os.devnull, "w") # A writable /dev/null
3287
# Only used if server is running in foreground but not in debug
3288
# mode
3289
if debug or not foreground:
3290
wnull.close()
3291
3292
# Get client data and settings from last running state.
2145
clients_data = []
2146
2147
# Get client data and settings from last running state.
3293
2148
if server_settings["restore"]:
3294
2149
try:
3295
2150
with open(stored_state_path, "rb") as stored_state:
3296
if sys.version_info.major == 2:
3297
clients_data, old_client_settings = pickle.load(
3298
stored_state)
3299
else:
3300
bytes_clients_data, bytes_old_client_settings = (
3301
pickle.load(stored_state, encoding="bytes"))
3302
# Fix bytes to strings
3303
# clients_data
3304
# .keys()
3305
clients_data = {(key.decode("utf-8")
3306
if isinstance(key, bytes)
3307
else key): value
3308
for key, value in
3309
bytes_clients_data.items()}
3310
del bytes_clients_data
3311
for key in clients_data:
3312
value = {(k.decode("utf-8")
3313
if isinstance(k, bytes) else k): v
3314
for k, v in
3315
clients_data[key].items()}
3316
clients_data[key] = value
3317
# .client_structure
3318
value["client_structure"] = [
3319
(s.decode("utf-8")
3320
if isinstance(s, bytes)
3321
else s) for s in
3322
value["client_structure"]]
3323
# .name, .host, and .checker_command
3324
for k in ("name", "host", "checker_command"):
3325
if isinstance(value[k], bytes):
3326
value[k] = value[k].decode("utf-8")
3327
if "key_id" not in value:
3328
value["key_id"] = ""
3329
elif "fingerprint" not in value:
3330
value["fingerprint"] = ""
3331
# old_client_settings
3332
# .keys()
3333
old_client_settings = {
3334
(key.decode("utf-8")
3335
if isinstance(key, bytes)
3336
else key): value
3337
for key, value in
3338
bytes_old_client_settings.items()}
3339
del bytes_old_client_settings
3340
# .host and .checker_command
3341
for value in old_client_settings.values():
3342
for attribute in ("host", "checker_command"):
3343
if isinstance(value[attribute], bytes):
3344
value[attribute] = (value[attribute]
3345
.decode("utf-8"))
2151
clients_data, old_client_settings = pickle.load(stored_state)
3346
2152
os.remove(stored_state_path)
3347
2153
except IOError as e:
3348
if e.errno == errno.ENOENT:
3349
log.warning("Could not load persistent state:"
3350
" %s", os.strerror(e.errno))
3351
else:
3352
log.critical("Could not load persistent state:",
3353
exc_info=e)
2154
logger.warning("Could not load persistant state: {0}".format(e))
2155
if e.errno != errno.ENOENT:
3354
2156
raise
3355
except EOFError as e:
3356
log.warning("Could not load persistent state: EOFError:",
3357
exc_info=e)
3358
3359
with PGPEngine() as pgp:
3360
for client_name, client in clients_data.items():
3361
# Skip removed clients
3362
if client_name not in client_settings:
3363
continue
3364
3365
# Decide which value to use after restoring saved state.
3366
# We have three different values: Old config file,
3367
# new config file, and saved state.
3368
# New config value takes precedence if it differs from old
3369
# config value, otherwise use saved state.
3370
for name, value in client_settings[client_name].items():
3371
try:
3372
# For each value in new config, check if it
3373
# differs from the old config value (Except for
3374
# the "secret" attribute)
3375
if (name != "secret"
3376
and (value !=
3377
old_client_settings[client_name][name])):
3378
client[name] = value
3379
except KeyError:
3380
pass
3381
3382
# Clients who has passed its expire date can still be
3383
# enabled if its last checker was successful. A Client
3384
# whose checker succeeded before we stored its state is
3385
# assumed to have successfully run all checkers during
3386
# downtime.
3387
if client["enabled"]:
3388
if datetime.datetime.utcnow() >= client["expires"]:
3389
if not client["last_checked_ok"]:
3390
log.warning("disabling client %s - Client"
3391
" never performed a successful"
3392
" checker", client_name)
3393
client["enabled"] = False
3394
elif client["last_checker_status"] != 0:
3395
log.warning("disabling client %s - Client"
3396
" last checker failed with error"
3397
" code %s", client_name,
3398
client["last_checker_status"])
3399
client["enabled"] = False
3400
else:
3401
client["expires"] = (
3402
datetime.datetime.utcnow()
3403
+ client["timeout"])
3404
log.debug("Last checker succeeded, keeping %s"
3405
" enabled", client_name)
2157
2158
for client in clients_data:
2159
client_name = client["name"]
2160
2161
# Decide which value to use after restoring saved state.
2162
# We have three different values: Old config file,
2163
# new config file, and saved state.
2164
# New config value takes precedence if it differs from old
2165
# config value, otherwise use saved state.
2166
for name, value in client_settings[client_name].items():
3406
2167
try:
3407
client["secret"] = pgp.decrypt(
3408
client["encrypted_secret"],
3409
client_settings[client_name]["secret"])
3410
except PGPError:
3411
# If decryption fails, we use secret from new settings
3412
log.debug("Failed to decrypt %s old secret",
3413
client_name)
3414
client["secret"] = (client_settings[client_name]
3415
["secret"])
3416
3417
# Add/remove clients based on new changes made to config
3418
for client_name in (set(old_client_settings)
3419
- set(client_settings)):
3420
del clients_data[client_name]
3421
for client_name in (set(client_settings)
3422
- set(old_client_settings)):
3423
clients_data[client_name] = client_settings[client_name]
3424
3425
# Create all client objects
3426
for client_name, client in clients_data.items():
3427
tcp_server.clients[client_name] = client_class(
3428
name=client_name,
3429
settings=client,
3430
server_settings=server_settings)
2168
# For each value in new config, check if it differs
2169
# from the old config value (Except for the "secret"
2170
# attribute)
2171
if name != "secret" and value != old_client_settings[client_name][name]:
2172
setattr(client, name, value)
2173
except KeyError:
2174
pass
2175
2176
# Clients who has passed its expire date, can still be enabled if its
2177
# last checker was sucessful. Clients who checkers failed before we
2178
# stored it state is asumed to had failed checker during downtime.
2179
if client["enabled"] and client["last_checked_ok"]:
2180
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2181
> client["interval"]):
2182
if client["last_checker_status"] != 0:
2183
client["enabled"] = False
2184
else:
2185
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2186
2187
client["changedstate"] = (multiprocessing_manager
2188
.Condition(multiprocessing_manager
2189
.Lock()))
2190
if use_dbus:
2191
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2192
tcp_server.clients[client_name] = new_client
2193
new_client.bus = bus
2194
for name, value in client.iteritems():
2195
setattr(new_client, name, value)
2196
client_object_name = unicode(client_name).translate(
2197
{ord("."): ord("_"),
2198
ord("-"): ord("_")})
2199
new_client.dbus_object_path = (dbus.ObjectPath
2200
("/clients/" + client_object_name))
2201
DBusObjectWithProperties.__init__(new_client,
2202
new_client.bus,
2203
new_client.dbus_object_path)
2204
else:
2205
tcp_server.clients[client_name] = Client.__new__(Client)
2206
for name, value in client.iteritems():
2207
setattr(tcp_server.clients[client_name], name, value)
2208
2209
tcp_server.clients[client_name].decrypt_secret(
2210
client_settings[client_name]["secret"])
2211
2212
# Create/remove clients based on new changes made to config
2213
for clientname in set(old_client_settings) - set(client_settings):
2214
del tcp_server.clients[clientname]
2215
for clientname in set(client_settings) - set(old_client_settings):
2216
tcp_server.clients[clientname] = (client_class(name = clientname,
2217
config =
2218
client_settings
2219
[clientname]))
2220
3431
2221
3432
2222
if not tcp_server.clients:
3433
log.warning("No clients defined")
3434
3435
if not foreground:
3436
if pidfile is not None:
3437
pid = os.getpid()
3438
try:
3439
with pidfile:
3440
print(pid, file=pidfile)
3441
except IOError:
3442
log.error("Could not write to file %r with PID %d",
3443
pidfilename, pid)
3444
del pidfile
2223
logger.warning("No clients defined")
2224
2225
if not debug:
2226
try:
2227
with pidfile:
2228
pid = os.getpid()
2229
pidfile.write(str(pid) + "\n".encode("utf-8"))
2230
del pidfile
2231
except IOError:
2232
logger.error("Could not write to file %r with PID %d",
2233
pidfilename, pid)
2234
except NameError:
2235
# "pidfile" was never created
2236
pass
3445
2237
del pidfilename
3446
3447
for termsig in (signal.SIGHUP, signal.SIGTERM):
3448
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3449
lambda: main_loop.quit() and False)
3450
2238
2239
signal.signal(signal.SIGINT, signal.SIG_IGN)
2240
2241
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2242
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2243
3451
2244
if use_dbus:
3452
3453
@alternate_dbus_interfaces(
3454
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3455
class MandosDBusService(DBusObjectWithObjectManager):
2245
class MandosDBusService(dbus.service.Object):
3456
2246
"""A D-Bus proxy object"""
3457
3458
2247
def __init__(self):
3459
2248
dbus.service.Object.__init__(self, bus, "/")
3460
3461
2249
_interface = "se.recompile.Mandos"
3462
2250
3463
2251
@dbus.service.signal(_interface, signature="o")
3464
2252
def ClientAdded(self, objpath):
3465
2253
"D-Bus signal"
3466
2254
pass
3467
2255
3468
2256
@dbus.service.signal(_interface, signature="ss")
3469
def ClientNotFound(self, key_id, address):
2257
def ClientNotFound(self, fingerprint, address):
3470
2258
"D-Bus signal"
3471
2259
pass
3472
3473
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3474
"true"})
2260
3475
2261
@dbus.service.signal(_interface, signature="os")
3476
2262
def ClientRemoved(self, objpath, name):
3477
2263
"D-Bus signal"
3478
2264
pass
3479
3480
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3481
"true"})
2265
3482
2266
@dbus.service.method(_interface, out_signature="ao")
3483
2267
def GetAllClients(self):
3484
2268
"D-Bus method"
3485
return dbus.Array(c.dbus_object_path for c in
3486
tcp_server.clients.values())
3487
3488
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3489
"true"})
2269
return dbus.Array(c.dbus_object_path
2270
for c in
2271
tcp_server.clients.itervalues())
2272
3490
2273
@dbus.service.method(_interface,
3491
2274
out_signature="a{oa{sv}}")
3492
2275
def GetAllClientsWithProperties(self):
3493
2276
"D-Bus method"
3494
2277
return dbus.Dictionary(
3495
{c.dbus_object_path: c.GetAll(
3496
"se.recompile.Mandos.Client")
3497
for c in tcp_server.clients.values()},
2278
((c.dbus_object_path, c.GetAll(""))
2279
for c in tcp_server.clients.itervalues()),
3498
2280
signature="oa{sv}")
3499
2281
3500
2282
@dbus.service.method(_interface, in_signature="o")
3501
2283
def RemoveClient(self, object_path):
3502
2284
"D-Bus method"
3503
for c in tcp_server.clients.values():
2285
for c in tcp_server.clients.itervalues():
3504
2286
if c.dbus_object_path == object_path:
3505
2287
del tcp_server.clients[c.name]
3506
2288
c.remove_from_connection()
3507
# Don't signal the disabling
2289
# Don't signal anything except ClientRemoved
3508
2290
c.disable(quiet=True)
3509
# Emit D-Bus signal for removal
3510
self.client_removed_signal(c)
2291
# Emit D-Bus signal
2292
self.ClientRemoved(object_path, c.name)
3511
2293
return
3512
2294
raise KeyError(object_path)
3513
2295
3514
2296
del _interface
3515
3516
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3517
out_signature="a{oa{sa{sv}}}")
3518
def GetManagedObjects(self):
3519
"""D-Bus method"""
3520
return dbus.Dictionary(
3521
{client.dbus_object_path:
3522
dbus.Dictionary(
3523
{interface: client.GetAll(interface)
3524
for interface in
3525
client._get_all_interface_names()})
3526
for client in tcp_server.clients.values()})
3527
3528
def client_added_signal(self, client):
3529
"""Send the new standard signal and the old signal"""
3530
if use_dbus:
3531
# New standard signal
3532
self.InterfacesAdded(
3533
client.dbus_object_path,
3534
dbus.Dictionary(
3535
{interface: client.GetAll(interface)
3536
for interface in
3537
client._get_all_interface_names()}))
3538
# Old signal
3539
self.ClientAdded(client.dbus_object_path)
3540
3541
def client_removed_signal(self, client):
3542
"""Send the new standard signal and the old signal"""
3543
if use_dbus:
3544
# New standard signal
3545
self.InterfacesRemoved(
3546
client.dbus_object_path,
3547
client._get_all_interface_names())
3548
# Old signal
3549
self.ClientRemoved(client.dbus_object_path,
3550
client.name)
3551
3552
mandos_dbus_service = MandosDBusService()
3553
3554
# Save modules to variables to exempt the modules from being
3555
# unloaded before the function registered with atexit() is run.
3556
mp = multiprocessing
3557
wn = wnull
3558
2297
2298
class MandosDBusServiceTransitional(MandosDBusService):
2299
__metaclass__ = AlternateDBusNamesMetaclass
2300
mandos_dbus_service = MandosDBusServiceTransitional()
2301
3559
2302
def cleanup():
3560
2303
"Cleanup function; run on exit"
3561
if zeroconf:
3562
service.cleanup()
3563
3564
mp.active_children()
3565
wn.close()
2304
service.cleanup()
2305
2306
multiprocessing.active_children()
3566
2307
if not (tcp_server.clients or client_settings):
3567
2308
return
3568
2309
3569
# Store client before exiting. Secrets are encrypted with key
3570
# based on what config file has. If config file is
3571
# removed/edited, old secret will thus be unrecovable.
3572
clients = {}
3573
with PGPEngine() as pgp:
3574
for client in tcp_server.clients.values():
3575
key = client_settings[client.name]["secret"]
3576
client.encrypted_secret = pgp.encrypt(client.secret,
3577
key)
3578
client_dict = {}
3579
3580
# A list of attributes that can not be pickled
3581
# + secret.
3582
exclude = {"bus", "changedstate", "secret",
3583
"checker", "server_settings"}
3584
for name, typ in inspect.getmembers(dbus.service
3585
.Object):
3586
exclude.add(name)
3587
3588
client_dict["encrypted_secret"] = (client
3589
.encrypted_secret)
3590
for attr in client.client_structure:
3591
if attr not in exclude:
3592
client_dict[attr] = getattr(client, attr)
3593
3594
clients[client.name] = client_dict
3595
del client_settings[client.name]["secret"]
3596
2310
# Store client before exiting. Secrets are encrypted with key based
2311
# on what config file has. If config file is removed/edited, old
2312
# secret will thus be unrecovable.
2313
clients = []
2314
for client in tcp_server.clients.itervalues():
2315
client.encrypt_secret(client_settings[client.name]["secret"])
2316
2317
client_dict = {}
2318
2319
# A list of attributes that will not be stored when shuting down.
2320
exclude = set(("bus", "changedstate", "secret"))
2321
for name, typ in inspect.getmembers(dbus.service.Object):
2322
exclude.add(name)
2323
2324
client_dict["encrypted_secret"] = client.encrypted_secret
2325
for attr in client.client_structure:
2326
if attr not in exclude:
2327
client_dict[attr] = getattr(client, attr)
2328
2329
clients.append(client_dict)
2330
del client_settings[client.name]["secret"]
2331
3597
2332
try:
3598
with tempfile.NamedTemporaryFile(
3599
mode="wb",
3600
suffix=".pickle",
3601
prefix="clients-",
3602
dir=os.path.dirname(stored_state_path),
3603
delete=False) as stored_state:
3604
pickle.dump((clients, client_settings), stored_state,
3605
protocol=2)
3606
tempname = stored_state.name
3607
os.rename(tempname, stored_state_path)
3608
except (IOError, OSError) as e:
3609
if not debug:
3610
try:
3611
os.remove(tempname)
3612
except NameError:
3613
pass
3614
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3615
log.warning("Could not save persistent state: %s",
3616
os.strerror(e.errno))
3617
else:
3618
log.warning("Could not save persistent state:",
3619
exc_info=e)
2333
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2334
pickle.dump((clients, client_settings), stored_state)
2335
except IOError as e:
2336
logger.warning("Could not save persistant state: {0}".format(e))
2337
if e.errno != errno.ENOENT:
3620
2338
raise
3621
2339
3622
2340
# Delete all clients, and settings from config
3624
2342
name, client = tcp_server.clients.popitem()
3625
2343
if use_dbus:
3626
2344
client.remove_from_connection()
3627
# Don't signal the disabling
2345
# Don't signal anything except ClientRemoved
3628
2346
client.disable(quiet=True)
3629
# Emit D-Bus signal for removal
3630
2347
if use_dbus:
3631
mandos_dbus_service.client_removed_signal(client)
2348
# Emit D-Bus signal
2349
mandos_dbus_service.ClientRemoved(client
2350
.dbus_object_path,
2351
client.name)
3632
2352
client_settings.clear()
3633
2353
3634
2354
atexit.register(cleanup)
3635
3636
for client in tcp_server.clients.values():
2355
2356
for client in tcp_server.clients.itervalues():
3637
2357
if use_dbus:
3638
# Emit D-Bus signal for adding
3639
mandos_dbus_service.client_added_signal(client)
2358
# Emit D-Bus signal
2359
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3640
2360
# Need to initiate checking of clients
3641
2361
if client.enabled:
3642
client.init_checker(randomize_start=True)
2362
client.init_checker()
3643
2363
2364
3644
2365
tcp_server.enable()
3645
2366
tcp_server.server_activate()
3646
2367
3647
2368
# Find out what port we got
3648
if zeroconf:
3649
service.port = tcp_server.socket.getsockname()[1]
2369
service.port = tcp_server.socket.getsockname()[1]
3650
2370
if use_ipv6:
3651
log.info("Now listening on address %r, port %d, flowinfo %d,"
3652
" scope_id %d", *tcp_server.socket.getsockname())
2371
logger.info("Now listening on address %r, port %d,"
2372
" flowinfo %d, scope_id %d"
2373
% tcp_server.socket.getsockname())
3653
2374
else: # IPv4
3654
log.info("Now listening on address %r, port %d",
3655
*tcp_server.socket.getsockname())
3656
3657
# service.interface = tcp_server.socket.getsockname()[3]
3658
2375
logger.info("Now listening on address %r, port %d"
2376
% tcp_server.socket.getsockname())
2377
2378
#service.interface = tcp_server.socket.getsockname()[3]
2379
3659
2380
try:
3660
if zeroconf:
3661
# From the Avahi example code
3662
try:
3663
service.activate()
3664
except dbus.exceptions.DBusException as error:
3665
log.critical("D-Bus Exception", exc_info=error)
3666
cleanup()
3667
sys.exit(1)
3668
# End of Avahi example code
3669
3670
GLib.io_add_watch(
3671
GLib.IOChannel.unix_new(tcp_server.fileno()),
3672
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3673
lambda *args, **kwargs: (tcp_server.handle_request
3674
(*args[2:], **kwargs) or True))
3675
3676
log.debug("Starting main loop")
2381
# From the Avahi example code
2382
try:
2383
service.activate()
2384
except dbus.exceptions.DBusException as error:
2385
logger.critical("DBusException: %s", error)
2386
cleanup()
2387
sys.exit(1)
2388
# End of Avahi example code
2389
2390
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2391
lambda *args, **kwargs:
2392
(tcp_server.handle_request
2393
(*args[2:], **kwargs) or True))
2394
2395
logger.debug("Starting main loop")
3677
2396
main_loop.run()
3678
2397
except AvahiError as error:
3679
log.critical("Avahi Error", exc_info=error)
2398
logger.critical("AvahiError: %s", error)
3680
2399
cleanup()
3681
2400
sys.exit(1)
3682
2401
except KeyboardInterrupt:
3683
2402
if debug:
3684
2403
print("", file=sys.stderr)
3685
log.debug("Server received KeyboardInterrupt")
3686
log.debug("Server exiting")
2404
logger.debug("Server received KeyboardInterrupt")
2405
logger.debug("Server exiting")
3687
2406
# Must run before the D-Bus bus name gets deregistered
3688
2407
cleanup()
3689
2408
3690
3691
def parse_test_args():
3692
# type: () -> argparse.Namespace
3693
parser = argparse.ArgumentParser(add_help=False)
3694
parser.add_argument("--check", action="store_true")
3695
parser.add_argument("--prefix", )
3696
args, unknown_args = parser.parse_known_args()
3697
if args.check:
3698
# Remove test options from sys.argv
3699
sys.argv[1:] = unknown_args
3700
return args
3701
3702
# Add all tests from doctest strings
3703
def load_tests(loader, tests, none):
3704
import doctest
3705
tests.addTests(doctest.DocTestSuite())
3706
return tests
3707
3708
if __name__ == "__main__":
3709
options = parse_test_args()
3710
try:
3711
if options.check:
3712
extra_test_prefix = options.prefix
3713
if extra_test_prefix is not None:
3714
if not (unittest.main(argv=[""], exit=False)
3715
.result.wasSuccessful()):
3716
sys.exit(1)
3717
class ExtraTestLoader(unittest.TestLoader):
3718
testMethodPrefix = extra_test_prefix
3719
# Call using ./scriptname --test [--verbose]
3720
unittest.main(argv=[""], testLoader=ExtraTestLoader())
3721
else:
3722
unittest.main(argv=[""])
3723
else:
3724
main()
3725
finally:
3726
logging.shutdown()
3727
3728
# Local Variables:
3729
# run-tests:
3730
# (lambda (&optional extra)
3731
# (if (not (funcall run-tests-in-test-buffer default-directory
3732
# extra))
3733
# (funcall show-test-buffer-in-test-window)
3734
# (funcall remove-test-window)
3735
# (if extra (message "Extra tests run successfully!"))))
3736
# run-tests-in-test-buffer:
3737
# (lambda (dir &optional extra)
3738
# (with-current-buffer (get-buffer-create "*Test*")
3739
# (setq buffer-read-only nil
3740
# default-directory dir)
3741
# (erase-buffer)
3742
# (compilation-mode))
3743
# (let ((process-result
3744
# (let ((inhibit-read-only t))
3745
# (process-file-shell-command
3746
# (funcall get-command-line extra) nil "*Test*"))))
3747
# (and (numberp process-result)
3748
# (= process-result 0))))
3749
# get-command-line:
3750
# (lambda (&optional extra)
3751
# (let ((quoted-script
3752
# (shell-quote-argument (funcall get-script-name))))
3753
# (format
3754
# (concat "%s --check" (if extra " --prefix=atest" ""))
3755
# quoted-script)))
3756
# get-script-name:
3757
# (lambda ()
3758
# (if (fboundp 'file-local-name)
3759
# (file-local-name (buffer-file-name))
3760
# (or (file-remote-p (buffer-file-name) 'localname)
3761
# (buffer-file-name))))
3762
# remove-test-window:
3763
# (lambda ()
3764
# (let ((test-window (get-buffer-window "*Test*")))
3765
# (if test-window (delete-window test-window))))
3766
# show-test-buffer-in-test-window:
3767
# (lambda ()
3768
# (when (not (get-buffer-window-list "*Test*"))
3769
# (setq next-error-last-buffer (get-buffer "*Test*"))
3770
# (let* ((side (if (>= (window-width) 146) 'right 'bottom))
3771
# (display-buffer-overriding-action
3772
# `((display-buffer-in-side-window) (side . ,side)
3773
# (window-height . fit-window-to-buffer)
3774
# (window-width . fit-window-to-buffer))))
3775
# (display-buffer "*Test*"))))
3776
# eval:
3777
# (progn
3778
# (let* ((run-extra-tests (lambda () (interactive)
3779
# (funcall run-tests t)))
3780
# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t
3781
# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c
3782
# (setq minor-mode-overriding-map-alist
3783
# (cons `(run-tests . ,outer-keymap)
3784
# minor-mode-overriding-map-alist)))
3785
# (add-hook 'after-save-hook run-tests 90 t))
3786
# End:
2409
2410
if __name__ == '__main__':
2411
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0